From: Chet Ramey Date: Mon, 9 Jan 2012 13:31:05 +0000 (-0500) Subject: commit bash-20111028 snapshot X-Git-Tag: bash-4.3-alpha~100 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=77638cbf4e221523f02dde91fcf3f8b802bea13a;p=thirdparty%2Fbash.git commit bash-20111028 snapshot --- diff --git a/CWRU/CWRU.chlog b/CWRU/CWRU.chlog index 825908ed2..1ee709d6b 100644 --- a/CWRU/CWRU.chlog +++ b/CWRU/CWRU.chlog @@ -12369,4 +12369,41 @@ lib/readline/complete.c instead of straight return; add same call at end of function. Placeholder for future work in deinstalling signal handlers when readline is not active - + + 10/25 + ----- +expr.c + - exp2: catch arithmetic overflow when val1 == INTMAX_MIN and val2 == -1 + for DIV and MOD and avoid SIGFPE. Bug report and pointer to fix + from Jaak Ristioja + - expassign: same changes for arithmetic overflow for DIV and MOD + + 10/28 + ----- +subst.c + - parameter_brace_expand: allow pattern substitution when there is an + expansion of the form ${var/} as a no-op: replacing nothing with + nothing + - parameter_brace_patsub: don't need to check for PATSUB being NULL; + it never is + +flags.c + - if STRICT_POSIX is defined, initialize history_expansion to 0, since + history expansion (and its treatment of ! within double quotes) is + not a conforming posix environment. From austin-group issue 500 + +lib/readline/histexpand.c + - history_expand: when processing a string within double quotes + (DQUOTE == 1), make the closing double quote inhibit history + expansion, as if the word were outside double quotes. In effect, + we assume that the double quote is followed by a character in + history_no_expand_chars. tcsh and csh seem to do this. This + answers a persistent complaint about history expansion + + 10/29 + ----- +make_cmd.c + - make_arith_for_command: use skip_to_delim to find the next `;' + when breaking the string between the double parens into three + separate components instead of a simple character loop. Fixes + bug reported by Dan Douglas diff --git a/CWRU/CWRU.chlog~ b/CWRU/CWRU.chlog~ index 85003595e..c284216af 100644 --- a/CWRU/CWRU.chlog~ +++ b/CWRU/CWRU.chlog~ @@ -12363,3 +12363,39 @@ builtins/history.def try to delete the last history entry -- the `history -s' command might not have been saved. Fixes bug reported by lester@vmw-les.eng.vmware.com + +lib/readline/complete.c + - rl_callback_read_char: add calls to a macro CALLBACK_READ_RETURN + instead of straight return; add same call at end of function. + Placeholder for future work in deinstalling signal handlers when + readline is not active + + 10/25 + ----- +expr.c + - exp2: catch arithmetic overflow when val1 == INTMAX_MIN and val2 == -1 + for DIV and MOD and avoid SIGFPE. Bug report and pointer to fix + from Jaak Ristioja + - expassign: same changes for arithmetic overflow for DIV and MOD + + 10/28 + ----- +subst.c + - parameter_brace_expand: allow pattern substitution when there is an + expansion of the form ${var/} as a no-op: replacing nothing with + nothing + - parameter_brace_patsub: don't need to check for PATSUB being NULL; + it never is + +flags.c + - if STRICT_POSIX is defined, initialize history_expansion to 0, since + history expansion (and its treatment of ! within double quotes) is + not a conforming posix environment. From austin-group issue 500 + +lib/readline/histexpand.c + - history_expand: when processing a string within double quotes + (DQUOTE == 1), make the closing double quote inhibit history + expansion, as if the word were outside double quotes. In effect, + we assume that the double quote is followed by a character in + history_no_expand_chars. tcsh and csh seem to do this. This + answers a persistent complaint about history expansion diff --git a/MANIFEST b/MANIFEST index 2e2163b9b..6129556c9 100644 --- a/MANIFEST +++ b/MANIFEST @@ -760,6 +760,7 @@ tests/arith1.sub f tests/arith2.sub f tests/arith3.sub f tests/arith4.sub f +tests/arith5.sub f tests/array.tests f tests/array.right f tests/array1.sub f diff --git a/builtins/mkbuiltins.c b/builtins/mkbuiltins.c index cdfdfb18a..c05cf30f5 100644 --- a/builtins/mkbuiltins.c +++ b/builtins/mkbuiltins.c @@ -537,7 +537,7 @@ extract_info (filename, structfile, externfile) { array_add (&buffer[i], defs->lines); - while (buffer[i] != '\n' && i < file_size) + while (i < file_size && buffer[i] != '\n') i++; buffer[i++] = '\0'; } diff --git a/doc/bash.0 b/doc/bash.0 index 7aa7f0bd9..ceb581bf1 100644 --- a/doc/bash.0 +++ b/doc/bash.0 @@ -1890,7 +1890,9 @@ RREEDDIIRREECCTTIIOONN >>_w_o_r_d 2>>&&1 - (see DDuupplliiccaattiinngg FFiillee DDeessccrriippttoorrss below). + When using the second form, _w_o_r_d may not expand to a number or --. If + it does, other redirection operators apply (see DDuupplliiccaattiinngg FFiillee + DDeessccrriippttoorrss below) for compatibility reasons. AAppppeennddiinngg SSttaannddaarrdd OOuuttppuutt aanndd SSttaannddaarrdd EErrrroorr This construct allows both the standard output (file descriptor 1) and @@ -1963,16 +1965,17 @@ RREEDDIIRREECCTTIIOONN is used similarly to duplicate output file descriptors. If _n is not specified, the standard output (file descriptor 1) is used. If the digits in _w_o_r_d do not specify a file descriptor open for output, a re- - direction error occurs. As a special case, if _n is omitted, and _w_o_r_d - does not expand to one or more digits, the standard output and standard - error are redirected as described previously. + direction error occurs. If _w_o_r_d evaluates to --, file descriptor _n is + closed. As a special case, if _n is omitted, and _w_o_r_d does not expand + to one or more digits or --, the standard output and standard error are + redirected as described previously. MMoovviinngg FFiillee DDeessccrriippttoorrss The redirection operator [_n]<<&&_d_i_g_i_t-- - moves the file descriptor _d_i_g_i_t to file descriptor _n, or the standard + moves the file descriptor _d_i_g_i_t to file descriptor _n, or the standard input (file descriptor 0) if _n is not specified. _d_i_g_i_t is closed after being duplicated to _n. @@ -1980,7 +1983,7 @@ RREEDDIIRREECCTTIIOONN [_n]>>&&_d_i_g_i_t-- - moves the file descriptor _d_i_g_i_t to file descriptor _n, or the standard + moves the file descriptor _d_i_g_i_t to file descriptor _n, or the standard output (file descriptor 1) if _n is not specified. OOppeenniinngg FFiillee DDeessccrriippttoorrss ffoorr RReeaaddiinngg aanndd WWrriittiinngg @@ -1988,117 +1991,117 @@ RREEDDIIRREECCTTIIOONN [_n]<<>>_w_o_r_d - causes the file whose name is the expansion of _w_o_r_d to be opened for - both reading and writing on file descriptor _n, or on file descriptor 0 + causes the file whose name is the expansion of _w_o_r_d to be opened for + both reading and writing on file descriptor _n, or on file descriptor 0 if _n is not specified. If the file does not exist, it is created. AALLIIAASSEESS - _A_l_i_a_s_e_s allow a string to be substituted for a word when it is used as - the first word of a simple command. The shell maintains a list of - aliases that may be set and unset with the aalliiaass and uunnaalliiaass builtin - commands (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). The first word of each - simple command, if unquoted, is checked to see if it has an alias. If - so, that word is replaced by the text of the alias. The characters //, - $$, ``, and == and any of the shell _m_e_t_a_c_h_a_r_a_c_t_e_r_s or quoting characters + _A_l_i_a_s_e_s allow a string to be substituted for a word when it is used as + the first word of a simple command. The shell maintains a list of + aliases that may be set and unset with the aalliiaass and uunnaalliiaass builtin + commands (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). The first word of each + simple command, if unquoted, is checked to see if it has an alias. If + so, that word is replaced by the text of the alias. The characters //, + $$, ``, and == and any of the shell _m_e_t_a_c_h_a_r_a_c_t_e_r_s or quoting characters listed above may not appear in an alias name. The replacement text may - contain any valid shell input, including shell metacharacters. The - first word of the replacement text is tested for aliases, but a word - that is identical to an alias being expanded is not expanded a second - time. This means that one may alias llss to llss --FF, for instance, and - bbaasshh does not try to recursively expand the replacement text. If the - last character of the alias value is a _b_l_a_n_k, then the next command + contain any valid shell input, including shell metacharacters. The + first word of the replacement text is tested for aliases, but a word + that is identical to an alias being expanded is not expanded a second + time. This means that one may alias llss to llss --FF, for instance, and + bbaasshh does not try to recursively expand the replacement text. If the + last character of the alias value is a _b_l_a_n_k, then the next command word following the alias is also checked for alias expansion. Aliases are created and listed with the aalliiaass command, and removed with the uunnaalliiaass command. - There is no mechanism for using arguments in the replacement text. If - arguments are needed, a shell function should be used (see FFUUNNCCTTIIOONNSS + There is no mechanism for using arguments in the replacement text. If + arguments are needed, a shell function should be used (see FFUUNNCCTTIIOONNSS below). - Aliases are not expanded when the shell is not interactive, unless the - eexxppaanndd__aalliiaasseess shell option is set using sshhoopptt (see the description of + Aliases are not expanded when the shell is not interactive, unless the + eexxppaanndd__aalliiaasseess shell option is set using sshhoopptt (see the description of sshhoopptt under SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). - The rules concerning the definition and use of aliases are somewhat - confusing. BBaasshh always reads at least one complete line of input - before executing any of the commands on that line. Aliases are - expanded when a command is read, not when it is executed. Therefore, - an alias definition appearing on the same line as another command does - not take effect until the next line of input is read. The commands + The rules concerning the definition and use of aliases are somewhat + confusing. BBaasshh always reads at least one complete line of input + before executing any of the commands on that line. Aliases are + expanded when a command is read, not when it is executed. Therefore, + an alias definition appearing on the same line as another command does + not take effect until the next line of input is read. The commands following the alias definition on that line are not affected by the new - alias. This behavior is also an issue when functions are executed. - Aliases are expanded when a function definition is read, not when the - function is executed, because a function definition is itself a com- + alias. This behavior is also an issue when functions are executed. + Aliases are expanded when a function definition is read, not when the + function is executed, because a function definition is itself a com- pound command. As a consequence, aliases defined in a function are not - available until after that function is executed. To be safe, always - put alias definitions on a separate line, and do not use aalliiaass in com- + available until after that function is executed. To be safe, always + put alias definitions on a separate line, and do not use aalliiaass in com- pound commands. For almost every purpose, aliases are superseded by shell functions. FFUUNNCCTTIIOONNSS - A shell function, defined as described above under SSHHEELLLL GGRRAAMMMMAARR, - stores a series of commands for later execution. When the name of a - shell function is used as a simple command name, the list of commands + A shell function, defined as described above under SSHHEELLLL GGRRAAMMMMAARR, + stores a series of commands for later execution. When the name of a + shell function is used as a simple command name, the list of commands associated with that function name is executed. Functions are executed - in the context of the current shell; no new process is created to - interpret them (contrast this with the execution of a shell script). - When a function is executed, the arguments to the function become the + in the context of the current shell; no new process is created to + interpret them (contrast this with the execution of a shell script). + When a function is executed, the arguments to the function become the positional parameters during its execution. The special parameter ## is - updated to reflect the change. Special parameter 00 is unchanged. The - first element of the FFUUNNCCNNAAMMEE variable is set to the name of the func- + updated to reflect the change. Special parameter 00 is unchanged. The + first element of the FFUUNNCCNNAAMMEE variable is set to the name of the func- tion while the function is executing. - All other aspects of the shell execution environment are identical + All other aspects of the shell execution environment are identical between a function and its caller with these exceptions: the DDEEBBUUGG and - RREETTUURRNN traps (see the description of the ttrraapp builtin under SSHHEELLLL - BBUUIILLTTIINN CCOOMMMMAANNDDSS below) are not inherited unless the function has been - given the ttrraaccee attribute (see the description of the ddeeccllaarree builtin - below) or the --oo ffuunnccttrraaccee shell option has been enabled with the sseett - builtin (in which case all functions inherit the DDEEBBUUGG and RREETTUURRNN - traps), and the EERRRR trap is not inherited unless the --oo eerrrrttrraaccee shell + RREETTUURRNN traps (see the description of the ttrraapp builtin under SSHHEELLLL + BBUUIILLTTIINN CCOOMMMMAANNDDSS below) are not inherited unless the function has been + given the ttrraaccee attribute (see the description of the ddeeccllaarree builtin + below) or the --oo ffuunnccttrraaccee shell option has been enabled with the sseett + builtin (in which case all functions inherit the DDEEBBUUGG and RREETTUURRNN + traps), and the EERRRR trap is not inherited unless the --oo eerrrrttrraaccee shell option has been enabled. - Variables local to the function may be declared with the llooccaall builtin + Variables local to the function may be declared with the llooccaall builtin command. Ordinarily, variables and their values are shared between the function and its caller. - The FFUUNNCCNNEESSTT variable, if set to a numeric value greater than 0, - defines a maximum function nesting level. Function invocations that + The FFUUNNCCNNEESSTT variable, if set to a numeric value greater than 0, + defines a maximum function nesting level. Function invocations that exceed the limit cause the entire command to abort. - If the builtin command rreettuurrnn is executed in a function, the function - completes and execution resumes with the next command after the func- - tion call. Any command associated with the RREETTUURRNN trap is executed + If the builtin command rreettuurrnn is executed in a function, the function + completes and execution resumes with the next command after the func- + tion call. Any command associated with the RREETTUURRNN trap is executed before execution resumes. When a function completes, the values of the - positional parameters and the special parameter ## are restored to the + positional parameters and the special parameter ## are restored to the values they had prior to the function's execution. - Function names and definitions may be listed with the --ff option to the + Function names and definitions may be listed with the --ff option to the ddeeccllaarree or ttyyppeesseett builtin commands. The --FF option to ddeeccllaarree or ttyyppee-- - sseett will list the function names only (and optionally the source file - and line number, if the eexxttddeebbuugg shell option is enabled). Functions - may be exported so that subshells automatically have them defined with - the --ff option to the eexxppoorrtt builtin. A function definition may be - deleted using the --ff option to the uunnsseett builtin. Note that shell + sseett will list the function names only (and optionally the source file + and line number, if the eexxttddeebbuugg shell option is enabled). Functions + may be exported so that subshells automatically have them defined with + the --ff option to the eexxppoorrtt builtin. A function definition may be + deleted using the --ff option to the uunnsseett builtin. Note that shell functions and variables with the same name may result in multiple iden- - tically-named entries in the environment passed to the shell's chil- + tically-named entries in the environment passed to the shell's chil- dren. Care should be taken in cases where this may cause a problem. Functions may be recursive. The FFUUNNCCNNEESSTT variable may be used to limit - the depth of the function call stack and restrict the number of func- - tion invocations. By default, no limit is imposed on the number of + the depth of the function call stack and restrict the number of func- + tion invocations. By default, no limit is imposed on the number of recursive calls. AARRIITTHHMMEETTIICC EEVVAALLUUAATTIIOONN - The shell allows arithmetic expressions to be evaluated, under certain - circumstances (see the lleett and ddeeccllaarree builtin commands and AArriitthhmmeettiicc - EExxppaannssiioonn). Evaluation is done in fixed-width integers with no check - for overflow, though division by 0 is trapped and flagged as an error. - The operators and their precedence, associativity, and values are the - same as in the C language. The following list of operators is grouped - into levels of equal-precedence operators. The levels are listed in + The shell allows arithmetic expressions to be evaluated, under certain + circumstances (see the lleett and ddeeccllaarree builtin commands and AArriitthhmmeettiicc + EExxppaannssiioonn). Evaluation is done in fixed-width integers with no check + for overflow, though division by 0 is trapped and flagged as an error. + The operators and their precedence, associativity, and values are the + same as in the C language. The following list of operators is grouped + into levels of equal-precedence operators. The levels are listed in order of decreasing precedence. _i_d++++ _i_d---- @@ -2126,46 +2129,46 @@ AARRIITTHHMMEETTIICC EEVVAALLUUAATTIIOONN _e_x_p_r_1 ,, _e_x_p_r_2 comma - Shell variables are allowed as operands; parameter expansion is per- + Shell variables are allowed as operands; parameter expansion is per- formed before the expression is evaluated. Within an expression, shell - variables may also be referenced by name without using the parameter - expansion syntax. A shell variable that is null or unset evaluates to + variables may also be referenced by name without using the parameter + expansion syntax. A shell variable that is null or unset evaluates to 0 when referenced by name without using the parameter expansion syntax. - The value of a variable is evaluated as an arithmetic expression when - it is referenced, or when a variable which has been given the _i_n_t_e_g_e_r + The value of a variable is evaluated as an arithmetic expression when + it is referenced, or when a variable which has been given the _i_n_t_e_g_e_r attribute using ddeeccllaarree --ii is assigned a value. A null value evaluates - to 0. A shell variable need not have its _i_n_t_e_g_e_r attribute turned on + to 0. A shell variable need not have its _i_n_t_e_g_e_r attribute turned on to be used in an expression. Constants with a leading 0 are interpreted as octal numbers. A leading - 0x or 0X denotes hexadecimal. Otherwise, numbers take the form - [_b_a_s_e_#]n, where the optional _b_a_s_e is a decimal number between 2 and 64 - representing the arithmetic base, and _n is a number in that base. If - _b_a_s_e_# is omitted, then base 10 is used. The digits greater than 9 are - represented by the lowercase letters, the uppercase letters, @, and _, - in that order. If _b_a_s_e is less than or equal to 36, lowercase and - uppercase letters may be used interchangeably to represent numbers + 0x or 0X denotes hexadecimal. Otherwise, numbers take the form + [_b_a_s_e_#]n, where the optional _b_a_s_e is a decimal number between 2 and 64 + representing the arithmetic base, and _n is a number in that base. If + _b_a_s_e_# is omitted, then base 10 is used. The digits greater than 9 are + represented by the lowercase letters, the uppercase letters, @, and _, + in that order. If _b_a_s_e is less than or equal to 36, lowercase and + uppercase letters may be used interchangeably to represent numbers between 10 and 35. - Operators are evaluated in order of precedence. Sub-expressions in - parentheses are evaluated first and may override the precedence rules + Operators are evaluated in order of precedence. Sub-expressions in + parentheses are evaluated first and may override the precedence rules above. CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS - Conditional expressions are used by the [[[[ compound command and the - tteesstt and [[ builtin commands to test file attributes and perform string - and arithmetic comparisons. Expressions are formed from the following - unary or binary primaries. If any _f_i_l_e argument to one of the pri- + Conditional expressions are used by the [[[[ compound command and the + tteesstt and [[ builtin commands to test file attributes and perform string + and arithmetic comparisons. Expressions are formed from the following + unary or binary primaries. If any _f_i_l_e argument to one of the pri- maries is of the form _/_d_e_v_/_f_d_/_n, then file descriptor _n is checked. If - the _f_i_l_e argument to one of the primaries is one of _/_d_e_v_/_s_t_d_i_n, - _/_d_e_v_/_s_t_d_o_u_t, or _/_d_e_v_/_s_t_d_e_r_r, file descriptor 0, 1, or 2, respectively, + the _f_i_l_e argument to one of the primaries is one of _/_d_e_v_/_s_t_d_i_n, + _/_d_e_v_/_s_t_d_o_u_t, or _/_d_e_v_/_s_t_d_e_r_r, file descriptor 0, 1, or 2, respectively, is checked. Unless otherwise specified, primaries that operate on files follow sym- bolic links and operate on the target of the link, rather than the link itself. - When used with [[[[, the << and >> operators sort lexicographically using + When used with [[[[, the << and >> operators sort lexicographically using the current locale. The tteesstt command sorts using ASCII ordering. --aa _f_i_l_e @@ -2204,27 +2207,27 @@ CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS --LL _f_i_l_e True if _f_i_l_e exists and is a symbolic link. --NN _f_i_l_e - True if _f_i_l_e exists and has been modified since it was last + True if _f_i_l_e exists and has been modified since it was last read. --OO _f_i_l_e True if _f_i_l_e exists and is owned by the effective user id. --SS _f_i_l_e True if _f_i_l_e exists and is a socket. _f_i_l_e_1 --eeff _f_i_l_e_2 - True if _f_i_l_e_1 and _f_i_l_e_2 refer to the same device and inode num- + True if _f_i_l_e_1 and _f_i_l_e_2 refer to the same device and inode num- bers. _f_i_l_e_1 -nntt _f_i_l_e_2 - True if _f_i_l_e_1 is newer (according to modification date) than + True if _f_i_l_e_1 is newer (according to modification date) than _f_i_l_e_2, or if _f_i_l_e_1 exists and _f_i_l_e_2 does not. _f_i_l_e_1 -oott _f_i_l_e_2 - True if _f_i_l_e_1 is older than _f_i_l_e_2, or if _f_i_l_e_2 exists and _f_i_l_e_1 + True if _f_i_l_e_1 is older than _f_i_l_e_2, or if _f_i_l_e_2 exists and _f_i_l_e_1 does not. --oo _o_p_t_n_a_m_e - True if the shell option _o_p_t_n_a_m_e is enabled. See the list of - options under the description of the --oo option to the sseett + True if the shell option _o_p_t_n_a_m_e is enabled. See the list of + options under the description of the --oo option to the sseett builtin below. --vv _v_a_r_n_a_m_e - True if the shell variable _v_a_r_n_a_m_e is set (has been assigned a + True if the shell variable _v_a_r_n_a_m_e is set (has been assigned a value). --zz _s_t_r_i_n_g True if the length of _s_t_r_i_n_g is zero. @@ -2234,7 +2237,7 @@ CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS _s_t_r_i_n_g_1 ==== _s_t_r_i_n_g_2 _s_t_r_i_n_g_1 == _s_t_r_i_n_g_2 - True if the strings are equal. == should be used with the tteesstt + True if the strings are equal. == should be used with the tteesstt command for POSIX conformance. _s_t_r_i_n_g_1 !!== _s_t_r_i_n_g_2 @@ -2247,106 +2250,106 @@ CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS True if _s_t_r_i_n_g_1 sorts after _s_t_r_i_n_g_2 lexicographically. _a_r_g_1 OOPP _a_r_g_2 - OOPP is one of --eeqq, --nnee, --lltt, --llee, --ggtt, or --ggee. These arithmetic - binary operators return true if _a_r_g_1 is equal to, not equal to, - less than, less than or equal to, greater than, or greater than - or equal to _a_r_g_2, respectively. _A_r_g_1 and _a_r_g_2 may be positive + OOPP is one of --eeqq, --nnee, --lltt, --llee, --ggtt, or --ggee. These arithmetic + binary operators return true if _a_r_g_1 is equal to, not equal to, + less than, less than or equal to, greater than, or greater than + or equal to _a_r_g_2, respectively. _A_r_g_1 and _a_r_g_2 may be positive or negative integers. SSIIMMPPLLEE CCOOMMMMAANNDD EEXXPPAANNSSIIOONN - When a simple command is executed, the shell performs the following + When a simple command is executed, the shell performs the following expansions, assignments, and redirections, from left to right. - 1. The words that the parser has marked as variable assignments - (those preceding the command name) and redirections are saved + 1. The words that the parser has marked as variable assignments + (those preceding the command name) and redirections are saved for later processing. - 2. The words that are not variable assignments or redirections are - expanded. If any words remain after expansion, the first word - is taken to be the name of the command and the remaining words + 2. The words that are not variable assignments or redirections are + expanded. If any words remain after expansion, the first word + is taken to be the name of the command and the remaining words are the arguments. 3. Redirections are performed as described above under RREEDDIIRREECCTTIIOONN. 4. The text after the == in each variable assignment undergoes tilde expansion, parameter expansion, command substitution, arithmetic - expansion, and quote removal before being assigned to the vari- + expansion, and quote removal before being assigned to the vari- able. If no command name results, the variable assignments affect the current - shell environment. Otherwise, the variables are added to the environ- - ment of the executed command and do not affect the current shell envi- - ronment. If any of the assignments attempts to assign a value to a - readonly variable, an error occurs, and the command exits with a non- + shell environment. Otherwise, the variables are added to the environ- + ment of the executed command and do not affect the current shell envi- + ronment. If any of the assignments attempts to assign a value to a + readonly variable, an error occurs, and the command exits with a non- zero status. - If no command name results, redirections are performed, but do not - affect the current shell environment. A redirection error causes the + If no command name results, redirections are performed, but do not + affect the current shell environment. A redirection error causes the command to exit with a non-zero status. - If there is a command name left after expansion, execution proceeds as - described below. Otherwise, the command exits. If one of the expan- - sions contained a command substitution, the exit status of the command - is the exit status of the last command substitution performed. If + If there is a command name left after expansion, execution proceeds as + described below. Otherwise, the command exits. If one of the expan- + sions contained a command substitution, the exit status of the command + is the exit status of the last command substitution performed. If there were no command substitutions, the command exits with a status of zero. CCOOMMMMAANNDD EEXXEECCUUTTIIOONN - After a command has been split into words, if it results in a simple - command and an optional list of arguments, the following actions are + After a command has been split into words, if it results in a simple + command and an optional list of arguments, the following actions are taken. - If the command name contains no slashes, the shell attempts to locate - it. If there exists a shell function by that name, that function is - invoked as described above in FFUUNNCCTTIIOONNSS. If the name does not match a - function, the shell searches for it in the list of shell builtins. If + If the command name contains no slashes, the shell attempts to locate + it. If there exists a shell function by that name, that function is + invoked as described above in FFUUNNCCTTIIOONNSS. If the name does not match a + function, the shell searches for it in the list of shell builtins. If a match is found, that builtin is invoked. - If the name is neither a shell function nor a builtin, and contains no - slashes, bbaasshh searches each element of the PPAATTHH for a directory con- - taining an executable file by that name. BBaasshh uses a hash table to - remember the full pathnames of executable files (see hhaasshh under SSHHEELLLL - BBUUIILLTTIINN CCOOMMMMAANNDDSS below). A full search of the directories in PPAATTHH is - performed only if the command is not found in the hash table. If the + If the name is neither a shell function nor a builtin, and contains no + slashes, bbaasshh searches each element of the PPAATTHH for a directory con- + taining an executable file by that name. BBaasshh uses a hash table to + remember the full pathnames of executable files (see hhaasshh under SSHHEELLLL + BBUUIILLTTIINN CCOOMMMMAANNDDSS below). A full search of the directories in PPAATTHH is + performed only if the command is not found in the hash table. If the search is unsuccessful, the shell searches for a defined shell function named ccoommmmaanndd__nnoott__ffoouunndd__hhaannddllee. If that function exists, it is invoked - with the original command and the original command's arguments as its - arguments, and the function's exit status becomes the exit status of - the shell. If that function is not defined, the shell prints an error + with the original command and the original command's arguments as its + arguments, and the function's exit status becomes the exit status of + the shell. If that function is not defined, the shell prints an error message and returns an exit status of 127. - If the search is successful, or if the command name contains one or + If the search is successful, or if the command name contains one or more slashes, the shell executes the named program in a separate execu- tion environment. Argument 0 is set to the name given, and the remain- ing arguments to the command are set to the arguments given, if any. - If this execution fails because the file is not in executable format, - and the file is not a directory, it is assumed to be a _s_h_e_l_l _s_c_r_i_p_t, a - file containing shell commands. A subshell is spawned to execute it. - This subshell reinitializes itself, so that the effect is as if a new - shell had been invoked to handle the script, with the exception that - the locations of commands remembered by the parent (see hhaasshh below + If this execution fails because the file is not in executable format, + and the file is not a directory, it is assumed to be a _s_h_e_l_l _s_c_r_i_p_t, a + file containing shell commands. A subshell is spawned to execute it. + This subshell reinitializes itself, so that the effect is as if a new + shell had been invoked to handle the script, with the exception that + the locations of commands remembered by the parent (see hhaasshh below under SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS) are retained by the child. - If the program is a file beginning with ##!!, the remainder of the first - line specifies an interpreter for the program. The shell executes the + If the program is a file beginning with ##!!, the remainder of the first + line specifies an interpreter for the program. The shell executes the specified interpreter on operating systems that do not handle this exe- cutable format themselves. The arguments to the interpreter consist of - a single optional argument following the interpreter name on the first - line of the program, followed by the name of the program, followed by + a single optional argument following the interpreter name on the first + line of the program, followed by the name of the program, followed by the command arguments, if any. CCOOMMMMAANNDD EEXXEECCUUTTIIOONN EENNVVIIRROONNMMEENNTT - The shell has an _e_x_e_c_u_t_i_o_n _e_n_v_i_r_o_n_m_e_n_t, which consists of the follow- + The shell has an _e_x_e_c_u_t_i_o_n _e_n_v_i_r_o_n_m_e_n_t, which consists of the follow- ing: - +o open files inherited by the shell at invocation, as modified by + +o open files inherited by the shell at invocation, as modified by redirections supplied to the eexxeecc builtin - +o the current working directory as set by ccdd, ppuusshhdd, or ppooppdd, or + +o the current working directory as set by ccdd, ppuusshhdd, or ppooppdd, or inherited by the shell at invocation - +o the file creation mode mask as set by uummaasskk or inherited from + +o the file creation mode mask as set by uummaasskk or inherited from the shell's parent +o current traps set by ttrraapp @@ -2354,242 +2357,242 @@ CCOOMMMMAANNDD EEXXEECCUUTTIIOONN EENNVVIIRROONNMMEENN +o shell parameters that are set by variable assignment or with sseett or inherited from the shell's parent in the environment - +o shell functions defined during execution or inherited from the + +o shell functions defined during execution or inherited from the shell's parent in the environment - +o options enabled at invocation (either by default or with com- + +o options enabled at invocation (either by default or with com- mand-line arguments) or by sseett +o options enabled by sshhoopptt +o shell aliases defined with aalliiaass - +o various process IDs, including those of background jobs, the + +o various process IDs, including those of background jobs, the value of $$$$, and the value of PPPPIIDD - When a simple command other than a builtin or shell function is to be - executed, it is invoked in a separate execution environment that con- - sists of the following. Unless otherwise noted, the values are inher- + When a simple command other than a builtin or shell function is to be + executed, it is invoked in a separate execution environment that con- + sists of the following. Unless otherwise noted, the values are inher- ited from the shell. - +o the shell's open files, plus any modifications and additions + +o the shell's open files, plus any modifications and additions specified by redirections to the command +o the current working directory +o the file creation mode mask - +o shell variables and functions marked for export, along with + +o shell variables and functions marked for export, along with variables exported for the command, passed in the environment +o traps caught by the shell are reset to the values inherited from the shell's parent, and traps ignored by the shell are ignored - A command invoked in this separate environment cannot affect the + A command invoked in this separate environment cannot affect the shell's execution environment. - Command substitution, commands grouped with parentheses, and asynchro- + Command substitution, commands grouped with parentheses, and asynchro- nous commands are invoked in a subshell environment that is a duplicate - of the shell environment, except that traps caught by the shell are + of the shell environment, except that traps caught by the shell are reset to the values that the shell inherited from its parent at invoca- tion. Builtin commands that are invoked as part of a pipeline are also executed in a subshell environment. Changes made to the subshell envi- ronment cannot affect the shell's execution environment. Subshells spawned to execute command substitutions inherit the value of - the --ee option from the parent shell. When not in _p_o_s_i_x mode, bbaasshh + the --ee option from the parent shell. When not in _p_o_s_i_x mode, bbaasshh clears the --ee option in such subshells. - If a command is followed by a && and job control is not active, the - default standard input for the command is the empty file _/_d_e_v_/_n_u_l_l. - Otherwise, the invoked command inherits the file descriptors of the + If a command is followed by a && and job control is not active, the + default standard input for the command is the empty file _/_d_e_v_/_n_u_l_l. + Otherwise, the invoked command inherits the file descriptors of the calling shell as modified by redirections. EENNVVIIRROONNMMEENNTT - When a program is invoked it is given an array of strings called the + When a program is invoked it is given an array of strings called the _e_n_v_i_r_o_n_m_e_n_t. This is a list of _n_a_m_e-_v_a_l_u_e pairs, of the form _n_a_m_e=_v_a_l_u_e. - The shell provides several ways to manipulate the environment. On + The shell provides several ways to manipulate the environment. On invocation, the shell scans its own environment and creates a parameter - for each name found, automatically marking it for _e_x_p_o_r_t to child pro- - cesses. Executed commands inherit the environment. The eexxppoorrtt and - ddeeccllaarree --xx commands allow parameters and functions to be added to and + for each name found, automatically marking it for _e_x_p_o_r_t to child pro- + cesses. Executed commands inherit the environment. The eexxppoorrtt and + ddeeccllaarree --xx commands allow parameters and functions to be added to and deleted from the environment. If the value of a parameter in the envi- - ronment is modified, the new value becomes part of the environment, - replacing the old. The environment inherited by any executed command - consists of the shell's initial environment, whose values may be modi- - fied in the shell, less any pairs removed by the uunnsseett command, plus + ronment is modified, the new value becomes part of the environment, + replacing the old. The environment inherited by any executed command + consists of the shell's initial environment, whose values may be modi- + fied in the shell, less any pairs removed by the uunnsseett command, plus any additions via the eexxppoorrtt and ddeeccllaarree --xx commands. - The environment for any _s_i_m_p_l_e _c_o_m_m_a_n_d or function may be augmented - temporarily by prefixing it with parameter assignments, as described + The environment for any _s_i_m_p_l_e _c_o_m_m_a_n_d or function may be augmented + temporarily by prefixing it with parameter assignments, as described above in PPAARRAAMMEETTEERRSS. These assignment statements affect only the envi- ronment seen by that command. - If the --kk option is set (see the sseett builtin command below), then _a_l_l - parameter assignments are placed in the environment for a command, not + If the --kk option is set (see the sseett builtin command below), then _a_l_l + parameter assignments are placed in the environment for a command, not just those that precede the command name. - When bbaasshh invokes an external command, the variable __ is set to the + When bbaasshh invokes an external command, the variable __ is set to the full filename of the command and passed to that command in its environ- ment. EEXXIITT SSTTAATTUUSS - The exit status of an executed command is the value returned by the + The exit status of an executed command is the value returned by the _w_a_i_t_p_i_d system call or equivalent function. Exit statuses fall between - 0 and 255, though, as explained below, the shell may use values above + 0 and 255, though, as explained below, the shell may use values above 125 specially. Exit statuses from shell builtins and compound commands - are also limited to this range. Under certain circumstances, the shell + are also limited to this range. Under certain circumstances, the shell will use special values to indicate specific failure modes. For the shell's purposes, a command which exits with a zero exit status - has succeeded. An exit status of zero indicates success. A non-zero - exit status indicates failure. When a command terminates on a fatal + has succeeded. An exit status of zero indicates success. A non-zero + exit status indicates failure. When a command terminates on a fatal signal _N, bbaasshh uses the value of 128+_N as the exit status. - If a command is not found, the child process created to execute it - returns a status of 127. If a command is found but is not executable, + If a command is not found, the child process created to execute it + returns a status of 127. If a command is found but is not executable, the return status is 126. If a command fails because of an error during expansion or redirection, the exit status is greater than zero. - Shell builtin commands return a status of 0 (_t_r_u_e) if successful, and - non-zero (_f_a_l_s_e) if an error occurs while they execute. All builtins + Shell builtin commands return a status of 0 (_t_r_u_e) if successful, and + non-zero (_f_a_l_s_e) if an error occurs while they execute. All builtins return an exit status of 2 to indicate incorrect usage. - BBaasshh itself returns the exit status of the last command executed, - unless a syntax error occurs, in which case it exits with a non-zero + BBaasshh itself returns the exit status of the last command executed, + unless a syntax error occurs, in which case it exits with a non-zero value. See also the eexxiitt builtin command below. SSIIGGNNAALLSS - When bbaasshh is interactive, in the absence of any traps, it ignores + When bbaasshh is interactive, in the absence of any traps, it ignores SSIIGGTTEERRMM (so that kkiillll 00 does not kill an interactive shell), and SSIIGGIINNTT - is caught and handled (so that the wwaaiitt builtin is interruptible). In - all cases, bbaasshh ignores SSIIGGQQUUIITT. If job control is in effect, bbaasshh + is caught and handled (so that the wwaaiitt builtin is interruptible). In + all cases, bbaasshh ignores SSIIGGQQUUIITT. If job control is in effect, bbaasshh ignores SSIIGGTTTTIINN, SSIIGGTTTTOOUU, and SSIIGGTTSSTTPP. Non-builtin commands run by bbaasshh have signal handlers set to the values - inherited by the shell from its parent. When job control is not in - effect, asynchronous commands ignore SSIIGGIINNTT and SSIIGGQQUUIITT in addition to - these inherited handlers. Commands run as a result of command substi- + inherited by the shell from its parent. When job control is not in + effect, asynchronous commands ignore SSIIGGIINNTT and SSIIGGQQUUIITT in addition to + these inherited handlers. Commands run as a result of command substi- tution ignore the keyboard-generated job control signals SSIIGGTTTTIINN, SSIIGGTT-- TTOOUU, and SSIIGGTTSSTTPP. - The shell exits by default upon receipt of a SSIIGGHHUUPP. Before exiting, - an interactive shell resends the SSIIGGHHUUPP to all jobs, running or + The shell exits by default upon receipt of a SSIIGGHHUUPP. Before exiting, + an interactive shell resends the SSIIGGHHUUPP to all jobs, running or stopped. Stopped jobs are sent SSIIGGCCOONNTT to ensure that they receive the - SSIIGGHHUUPP. To prevent the shell from sending the signal to a particular - job, it should be removed from the jobs table with the ddiissoowwnn builtin - (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below) or marked to not receive SSIIGGHHUUPP + SSIIGGHHUUPP. To prevent the shell from sending the signal to a particular + job, it should be removed from the jobs table with the ddiissoowwnn builtin + (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below) or marked to not receive SSIIGGHHUUPP using ddiissoowwnn --hh. - If the hhuuppoonneexxiitt shell option has been set with sshhoopptt, bbaasshh sends a + If the hhuuppoonneexxiitt shell option has been set with sshhoopptt, bbaasshh sends a SSIIGGHHUUPP to all jobs when an interactive login shell exits. - If bbaasshh is waiting for a command to complete and receives a signal for + If bbaasshh is waiting for a command to complete and receives a signal for which a trap has been set, the trap will not be executed until the com- - mand completes. When bbaasshh is waiting for an asynchronous command via - the wwaaiitt builtin, the reception of a signal for which a trap has been + mand completes. When bbaasshh is waiting for an asynchronous command via + the wwaaiitt builtin, the reception of a signal for which a trap has been set will cause the wwaaiitt builtin to return immediately with an exit sta- tus greater than 128, immediately after which the trap is executed. JJOOBB CCOONNTTRROOLL - _J_o_b _c_o_n_t_r_o_l refers to the ability to selectively stop (_s_u_s_p_e_n_d) the + _J_o_b _c_o_n_t_r_o_l refers to the ability to selectively stop (_s_u_s_p_e_n_d) the execution of processes and continue (_r_e_s_u_m_e) their execution at a later - point. A user typically employs this facility via an interactive - interface supplied jointly by the operating system kernel's terminal + point. A user typically employs this facility via an interactive + interface supplied jointly by the operating system kernel's terminal driver and bbaasshh. - The shell associates a _j_o_b with each pipeline. It keeps a table of - currently executing jobs, which may be listed with the jjoobbss command. - When bbaasshh starts a job asynchronously (in the _b_a_c_k_g_r_o_u_n_d), it prints a + The shell associates a _j_o_b with each pipeline. It keeps a table of + currently executing jobs, which may be listed with the jjoobbss command. + When bbaasshh starts a job asynchronously (in the _b_a_c_k_g_r_o_u_n_d), it prints a line that looks like: [1] 25647 indicating that this job is job number 1 and that the process ID of the last process in the pipeline associated with this job is 25647. All of - the processes in a single pipeline are members of the same job. BBaasshh + the processes in a single pipeline are members of the same job. BBaasshh uses the _j_o_b abstraction as the basis for job control. - To facilitate the implementation of the user interface to job control, + To facilitate the implementation of the user interface to job control, the operating system maintains the notion of a _c_u_r_r_e_n_t _t_e_r_m_i_n_a_l _p_r_o_c_e_s_s _g_r_o_u_p _I_D. Members of this process group (processes whose process group ID is equal to the current terminal process group ID) receive keyboard- - generated signals such as SSIIGGIINNTT. These processes are said to be in - the _f_o_r_e_g_r_o_u_n_d. _B_a_c_k_g_r_o_u_n_d processes are those whose process group ID + generated signals such as SSIIGGIINNTT. These processes are said to be in + the _f_o_r_e_g_r_o_u_n_d. _B_a_c_k_g_r_o_u_n_d processes are those whose process group ID differs from the terminal's; such processes are immune to keyboard-gen- erated signals. Only foreground processes are allowed to read from or, - if the user so specifies with stty tostop, write to the terminal. - Background processes which attempt to read from (write to when stty - tostop is in effect) the terminal are sent a SSIIGGTTTTIINN ((SSIIGGTTTTOOUU)) signal - by the kernel's terminal driver, which, unless caught, suspends the + if the user so specifies with stty tostop, write to the terminal. + Background processes which attempt to read from (write to when stty + tostop is in effect) the terminal are sent a SSIIGGTTTTIINN ((SSIIGGTTTTOOUU)) signal + by the kernel's terminal driver, which, unless caught, suspends the process. - If the operating system on which bbaasshh is running supports job control, + If the operating system on which bbaasshh is running supports job control, bbaasshh contains facilities to use it. Typing the _s_u_s_p_e_n_d character (typ- ically ^^ZZ, Control-Z) while a process is running causes that process to - be stopped and returns control to bbaasshh. Typing the _d_e_l_a_y_e_d _s_u_s_p_e_n_d - character (typically ^^YY, Control-Y) causes the process to be stopped - when it attempts to read input from the terminal, and control to be - returned to bbaasshh. The user may then manipulate the state of this job, - using the bbgg command to continue it in the background, the ffgg command + be stopped and returns control to bbaasshh. Typing the _d_e_l_a_y_e_d _s_u_s_p_e_n_d + character (typically ^^YY, Control-Y) causes the process to be stopped + when it attempts to read input from the terminal, and control to be + returned to bbaasshh. The user may then manipulate the state of this job, + using the bbgg command to continue it in the background, the ffgg command to continue it in the foreground, or the kkiillll command to kill it. A ^^ZZ takes effect immediately, and has the additional side effect of causing pending output and typeahead to be discarded. There are a number of ways to refer to a job in the shell. The charac- - ter %% introduces a job specification (_j_o_b_s_p_e_c). Job number _n may be + ter %% introduces a job specification (_j_o_b_s_p_e_c). Job number _n may be referred to as %%nn. A job may also be referred to using a prefix of the name used to start it, or using a substring that appears in its command - line. For example, %%ccee refers to a stopped ccee job. If a prefix - matches more than one job, bbaasshh reports an error. Using %%??ccee, on the - other hand, refers to any job containing the string ccee in its command - line. If the substring matches more than one job, bbaasshh reports an - error. The symbols %%%% and %%++ refer to the shell's notion of the _c_u_r_- - _r_e_n_t _j_o_b, which is the last job stopped while it was in the foreground + line. For example, %%ccee refers to a stopped ccee job. If a prefix + matches more than one job, bbaasshh reports an error. Using %%??ccee, on the + other hand, refers to any job containing the string ccee in its command + line. If the substring matches more than one job, bbaasshh reports an + error. The symbols %%%% and %%++ refer to the shell's notion of the _c_u_r_- + _r_e_n_t _j_o_b, which is the last job stopped while it was in the foreground or started in the background. The _p_r_e_v_i_o_u_s _j_o_b may be referenced using %%--. If there is only a single job, %%++ and %%-- can both be used to refer - to that job. In output pertaining to jobs (e.g., the output of the + to that job. In output pertaining to jobs (e.g., the output of the jjoobbss command), the current job is always flagged with a ++, and the pre- - vious job with a --. A single % (with no accompanying job specifica- + vious job with a --. A single % (with no accompanying job specifica- tion) also refers to the current job. - Simply naming a job can be used to bring it into the foreground: %%11 is - a synonym for ````ffgg %%11'''', bringing job 1 from the background into the - foreground. Similarly, ````%%11 &&'''' resumes job 1 in the background, + Simply naming a job can be used to bring it into the foreground: %%11 is + a synonym for ````ffgg %%11'''', bringing job 1 from the background into the + foreground. Similarly, ````%%11 &&'''' resumes job 1 in the background, equivalent to ````bbgg %%11''''. - The shell learns immediately whenever a job changes state. Normally, + The shell learns immediately whenever a job changes state. Normally, bbaasshh waits until it is about to print a prompt before reporting changes - in a job's status so as to not interrupt any other output. If the --bb + in a job's status so as to not interrupt any other output. If the --bb option to the sseett builtin command is enabled, bbaasshh reports such changes - immediately. Any trap on SSIIGGCCHHLLDD is executed for each child that + immediately. Any trap on SSIIGGCCHHLLDD is executed for each child that exits. - If an attempt to exit bbaasshh is made while jobs are stopped (or, if the - cchheecckkjjoobbss shell option has been enabled using the sshhoopptt builtin, run- + If an attempt to exit bbaasshh is made while jobs are stopped (or, if the + cchheecckkjjoobbss shell option has been enabled using the sshhoopptt builtin, run- ning), the shell prints a warning message, and, if the cchheecckkjjoobbss option - is enabled, lists the jobs and their statuses. The jjoobbss command may - then be used to inspect their status. If a second attempt to exit is - made without an intervening command, the shell does not print another + is enabled, lists the jobs and their statuses. The jjoobbss command may + then be used to inspect their status. If a second attempt to exit is + made without an intervening command, the shell does not print another warning, and any stopped jobs are terminated. PPRROOMMPPTTIINNGG When executing interactively, bbaasshh displays the primary prompt PPSS11 when - it is ready to read a command, and the secondary prompt PPSS22 when it - needs more input to complete a command. BBaasshh allows these prompt - strings to be customized by inserting a number of backslash-escaped + it is ready to read a command, and the secondary prompt PPSS22 when it + needs more input to complete a command. BBaasshh allows these prompt + strings to be customized by inserting a number of backslash-escaped special characters that are decoded as follows: \\aa an ASCII bell character (07) - \\dd the date in "Weekday Month Date" format (e.g., "Tue May + \\dd the date in "Weekday Month Date" format (e.g., "Tue May 26") \\DD{{_f_o_r_m_a_t}} - the _f_o_r_m_a_t is passed to _s_t_r_f_t_i_m_e(3) and the result is - inserted into the prompt string; an empty _f_o_r_m_a_t results + the _f_o_r_m_a_t is passed to _s_t_r_f_t_i_m_e(3) and the result is + inserted into the prompt string; an empty _f_o_r_m_a_t results in a locale-specific time representation. The braces are required \\ee an ASCII escape character (033) @@ -2599,7 +2602,7 @@ PPRROOMMPPTTIINNGG \\ll the basename of the shell's terminal device name \\nn newline \\rr carriage return - \\ss the name of the shell, the basename of $$00 (the portion + \\ss the name of the shell, the basename of $$00 (the portion following the final slash) \\tt the current time in 24-hour HH:MM:SS format \\TT the current time in 12-hour HH:MM:SS format @@ -2608,8 +2611,8 @@ PPRROOMMPPTTIINNGG \\uu the username of the current user \\vv the version of bbaasshh (e.g., 2.00) \\VV the release of bbaasshh, version + patch level (e.g., 2.00.0) - \\ww the current working directory, with $$HHOOMMEE abbreviated - with a tilde (uses the value of the PPRROOMMPPTT__DDIIRRTTRRIIMM vari- + \\ww the current working directory, with $$HHOOMMEE abbreviated + with a tilde (uses the value of the PPRROOMMPPTT__DDIIRRTTRRIIMM vari- able) \\WW the basename of the current working directory, with $$HHOOMMEE abbreviated with a tilde @@ -2618,66 +2621,66 @@ PPRROOMMPPTTIINNGG \\$$ if the effective UID is 0, a ##, otherwise a $$ \\_n_n_n the character corresponding to the octal number _n_n_n \\\\ a backslash - \\[[ begin a sequence of non-printing characters, which could - be used to embed a terminal control sequence into the + \\[[ begin a sequence of non-printing characters, which could + be used to embed a terminal control sequence into the prompt \\]] end a sequence of non-printing characters - The command number and the history number are usually different: the - history number of a command is its position in the history list, which - may include commands restored from the history file (see HHIISSTTOORRYY - below), while the command number is the position in the sequence of - commands executed during the current shell session. After the string - is decoded, it is expanded via parameter expansion, command substitu- - tion, arithmetic expansion, and quote removal, subject to the value of - the pprroommppttvvaarrss shell option (see the description of the sshhoopptt command + The command number and the history number are usually different: the + history number of a command is its position in the history list, which + may include commands restored from the history file (see HHIISSTTOORRYY + below), while the command number is the position in the sequence of + commands executed during the current shell session. After the string + is decoded, it is expanded via parameter expansion, command substitu- + tion, arithmetic expansion, and quote removal, subject to the value of + the pprroommppttvvaarrss shell option (see the description of the sshhoopptt command under SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). RREEAADDLLIINNEE - This is the library that handles reading input when using an interac- + This is the library that handles reading input when using an interac- tive shell, unless the ----nnooeeddiittiinngg option is given at shell invocation. Line editing is also used when using the --ee option to the rreeaadd builtin. By default, the line editing commands are similar to those of Emacs. A vi-style line editing interface is also available. Line editing can be - enabled at any time using the --oo eemmaaccss or --oo vvii options to the sseett - builtin (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). To turn off line editing - after the shell is running, use the ++oo eemmaaccss or ++oo vvii options to the + enabled at any time using the --oo eemmaaccss or --oo vvii options to the sseett + builtin (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). To turn off line editing + after the shell is running, use the ++oo eemmaaccss or ++oo vvii options to the sseett builtin. RReeaaddlliinnee NNoottaattiioonn In this section, the Emacs-style notation is used to denote keystrokes. - Control keys are denoted by C-_k_e_y, e.g., C-n means Control-N. Simi- - larly, _m_e_t_a keys are denoted by M-_k_e_y, so M-x means Meta-X. (On key- - boards without a _m_e_t_a key, M-_x means ESC _x, i.e., press the Escape key + Control keys are denoted by C-_k_e_y, e.g., C-n means Control-N. Simi- + larly, _m_e_t_a keys are denoted by M-_k_e_y, so M-x means Meta-X. (On key- + boards without a _m_e_t_a key, M-_x means ESC _x, i.e., press the Escape key then the _x key. This makes ESC the _m_e_t_a _p_r_e_f_i_x. The combination M-C-_x - means ESC-Control-_x, or press the Escape key then hold the Control key + means ESC-Control-_x, or press the Escape key then hold the Control key while pressing the _x key.) Readline commands may be given numeric _a_r_g_u_m_e_n_t_s, which normally act as - a repeat count. Sometimes, however, it is the sign of the argument - that is significant. Passing a negative argument to a command that - acts in the forward direction (e.g., kkiillll--lliinnee) causes that command to - act in a backward direction. Commands whose behavior with arguments + a repeat count. Sometimes, however, it is the sign of the argument + that is significant. Passing a negative argument to a command that + acts in the forward direction (e.g., kkiillll--lliinnee) causes that command to + act in a backward direction. Commands whose behavior with arguments deviates from this are noted below. - When a command is described as _k_i_l_l_i_n_g text, the text deleted is saved + When a command is described as _k_i_l_l_i_n_g text, the text deleted is saved for possible future retrieval (_y_a_n_k_i_n_g). The killed text is saved in a _k_i_l_l _r_i_n_g. Consecutive kills cause the text to be accumulated into one unit, which can be yanked all at once. Commands which do not kill text separate the chunks of text on the kill ring. RReeaaddlliinnee IInniittiiaalliizzaattiioonn - Readline is customized by putting commands in an initialization file - (the _i_n_p_u_t_r_c file). The name of this file is taken from the value of - the IINNPPUUTTRRCC variable. If that variable is unset, the default is - _~_/_._i_n_p_u_t_r_c. When a program which uses the readline library starts up, + Readline is customized by putting commands in an initialization file + (the _i_n_p_u_t_r_c file). The name of this file is taken from the value of + the IINNPPUUTTRRCC variable. If that variable is unset, the default is + _~_/_._i_n_p_u_t_r_c. When a program which uses the readline library starts up, the initialization file is read, and the key bindings and variables are - set. There are only a few basic constructs allowed in the readline - initialization file. Blank lines are ignored. Lines beginning with a - ## are comments. Lines beginning with a $$ indicate conditional con- + set. There are only a few basic constructs allowed in the readline + initialization file. Blank lines are ignored. Lines beginning with a + ## are comments. Lines beginning with a $$ indicate conditional con- structs. Other lines denote key bindings and variable settings. - The default key-bindings may be changed with an _i_n_p_u_t_r_c file. Other + The default key-bindings may be changed with an _i_n_p_u_t_r_c file. Other programs that use this library may add their own commands and bindings. For example, placing @@ -2685,19 +2688,19 @@ RREEAADDLLIINNEE M-Control-u: universal-argument or C-Meta-u: universal-argument - into the _i_n_p_u_t_r_c would make M-C-u execute the readline command _u_n_i_v_e_r_- + into the _i_n_p_u_t_r_c would make M-C-u execute the readline command _u_n_i_v_e_r_- _s_a_l_-_a_r_g_u_m_e_n_t. - The following symbolic character names are recognized: _R_U_B_O_U_T, _D_E_L, + The following symbolic character names are recognized: _R_U_B_O_U_T, _D_E_L, _E_S_C, _L_F_D, _N_E_W_L_I_N_E, _R_E_T, _R_E_T_U_R_N, _S_P_C, _S_P_A_C_E, and _T_A_B. - In addition to command names, readline allows keys to be bound to a + In addition to command names, readline allows keys to be bound to a string that is inserted when the key is pressed (a _m_a_c_r_o). RReeaaddlliinnee KKeeyy BBiinnddiinnggss - The syntax for controlling key bindings in the _i_n_p_u_t_r_c file is simple. - All that is required is the name of the command or the text of a macro - and a key sequence to which it should be bound. The name may be speci- + The syntax for controlling key bindings in the _i_n_p_u_t_r_c file is simple. + All that is required is the name of the command or the text of a macro + and a key sequence to which it should be bound. The name may be speci- fied in one of two ways: as a symbolic key name, possibly with _M_e_t_a_- or _C_o_n_t_r_o_l_- prefixes, or as a key sequence. @@ -2708,15 +2711,15 @@ RREEAADDLLIINNEE Meta-Rubout: backward-kill-word Control-o: "> output" - In the above example, _C_-_u is bound to the function uunniivveerrssaall--aarrgguummeenntt, - _M_-_D_E_L is bound to the function bbaacckkwwaarrdd--kkiillll--wwoorrdd, and _C_-_o is bound to - run the macro expressed on the right hand side (that is, to insert the + In the above example, _C_-_u is bound to the function uunniivveerrssaall--aarrgguummeenntt, + _M_-_D_E_L is bound to the function bbaacckkwwaarrdd--kkiillll--wwoorrdd, and _C_-_o is bound to + run the macro expressed on the right hand side (that is, to insert the text ``> output'' into the line). - In the second form, ""kkeeyysseeqq"":_f_u_n_c_t_i_o_n_-_n_a_m_e or _m_a_c_r_o, kkeeyysseeqq differs - from kkeeyynnaammee above in that strings denoting an entire key sequence may - be specified by placing the sequence within double quotes. Some GNU - Emacs style key escapes can be used, as in the following example, but + In the second form, ""kkeeyysseeqq"":_f_u_n_c_t_i_o_n_-_n_a_m_e or _m_a_c_r_o, kkeeyysseeqq differs + from kkeeyynnaammee above in that strings denoting an entire key sequence may + be specified by placing the sequence within double quotes. Some GNU + Emacs style key escapes can be used, as in the following example, but the symbolic character names are not recognized. "\C-u": universal-argument @@ -2724,7 +2727,7 @@ RREEAADDLLIINNEE "\e[11~": "Function Key 1" In this example, _C_-_u is again bound to the function uunniivveerrssaall--aarrgguummeenntt. - _C_-_x _C_-_r is bound to the function rree--rreeaadd--iinniitt--ffiillee, and _E_S_C _[ _1 _1 _~ is + _C_-_x _C_-_r is bound to the function rree--rreeaadd--iinniitt--ffiillee, and _E_S_C _[ _1 _1 _~ is bound to insert the text ``Function Key 1''. The full set of GNU Emacs style escape sequences is @@ -2735,7 +2738,7 @@ RREEAADDLLIINNEE \\"" literal " \\'' literal ' - In addition to the GNU Emacs style escape sequences, a second set of + In addition to the GNU Emacs style escape sequences, a second set of backslash escapes is available: \\aa alert (bell) \\bb backspace @@ -2745,20 +2748,20 @@ RREEAADDLLIINNEE \\rr carriage return \\tt horizontal tab \\vv vertical tab - \\_n_n_n the eight-bit character whose value is the octal value + \\_n_n_n the eight-bit character whose value is the octal value _n_n_n (one to three digits) - \\xx_H_H the eight-bit character whose value is the hexadecimal + \\xx_H_H the eight-bit character whose value is the hexadecimal value _H_H (one or two hex digits) When entering the text of a macro, single or double quotes must be used to indicate a macro definition. Unquoted text is assumed to be a func- - tion name. In the macro body, the backslash escapes described above - are expanded. Backslash will quote any other character in the macro + tion name. In the macro body, the backslash escapes described above + are expanded. Backslash will quote any other character in the macro text, including " and '. - BBaasshh allows the current readline key bindings to be displayed or modi- - fied with the bbiinndd builtin command. The editing mode may be switched - during interactive use by using the --oo option to the sseett builtin com- + BBaasshh allows the current readline key bindings to be displayed or modi- + fied with the bbiinndd builtin command. The editing mode may be switched + during interactive use by using the --oo option to the sseett builtin com- mand (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). RReeaaddlliinnee VVaarriiaabblleess @@ -2768,190 +2771,190 @@ RREEAADDLLIINNEE sseett _v_a_r_i_a_b_l_e_-_n_a_m_e _v_a_l_u_e - Except where noted, readline variables can take the values OOnn or OOffff - (without regard to case). Unrecognized variable names are ignored. - When a variable value is read, empty or null values, "on" (case-insen- + Except where noted, readline variables can take the values OOnn or OOffff + (without regard to case). Unrecognized variable names are ignored. + When a variable value is read, empty or null values, "on" (case-insen- sitive), and "1" are equivalent to OOnn. All other values are equivalent to OOffff. The variables and their default values are: bbeellll--ssttyyllee ((aauuddiibbllee)) - Controls what happens when readline wants to ring the terminal + Controls what happens when readline wants to ring the terminal bell. If set to nnoonnee, readline never rings the bell. If set to - vviissiibbllee, readline uses a visible bell if one is available. If + vviissiibbllee, readline uses a visible bell if one is available. If set to aauuddiibbllee, readline attempts to ring the terminal's bell. bbiinndd--ttttyy--ssppeecciiaall--cchhaarrss ((OOnn)) - If set to OOnn, readline attempts to bind the control characters + If set to OOnn, readline attempts to bind the control characters treated specially by the kernel's terminal driver to their read- line equivalents. ccoommmmeenntt--bbeeggiinn ((````##'''')) - The string that is inserted when the readline iinnsseerrtt--ccoommmmeenntt + The string that is inserted when the readline iinnsseerrtt--ccoommmmeenntt command is executed. This command is bound to MM--## in emacs mode and to ## in vi command mode. ccoommpplleettiioonn--iiggnnoorree--ccaassee ((OOffff)) If set to OOnn, readline performs filename matching and completion in a case-insensitive fashion. ccoommpplleettiioonn--pprreeffiixx--ddiissppllaayy--lleennggtthh ((00)) - The length in characters of the common prefix of a list of pos- - sible completions that is displayed without modification. When - set to a value greater than zero, common prefixes longer than - this value are replaced with an ellipsis when displaying possi- + The length in characters of the common prefix of a list of pos- + sible completions that is displayed without modification. When + set to a value greater than zero, common prefixes longer than + this value are replaced with an ellipsis when displaying possi- ble completions. ccoommpplleettiioonn--qquueerryy--iitteemmss ((110000)) - This determines when the user is queried about viewing the num- - ber of possible completions generated by the ppoossssiibbllee--ccoommppllee-- - ttiioonnss command. It may be set to any integer value greater than - or equal to zero. If the number of possible completions is + This determines when the user is queried about viewing the num- + ber of possible completions generated by the ppoossssiibbllee--ccoommppllee-- + ttiioonnss command. It may be set to any integer value greater than + or equal to zero. If the number of possible completions is greater than or equal to the value of this variable, the user is - asked whether or not he wishes to view them; otherwise they are + asked whether or not he wishes to view them; otherwise they are simply listed on the terminal. ccoonnvveerrtt--mmeettaa ((OOnn)) - If set to OOnn, readline will convert characters with the eighth + If set to OOnn, readline will convert characters with the eighth bit set to an ASCII key sequence by stripping the eighth bit and - prefixing an escape character (in effect, using escape as the + prefixing an escape character (in effect, using escape as the _m_e_t_a _p_r_e_f_i_x). ddiissaabbllee--ccoommpplleettiioonn ((OOffff)) If set to OOnn, readline will inhibit word completion. Completion - characters will be inserted into the line as if they had been + characters will be inserted into the line as if they had been mapped to sseellff--iinnsseerrtt. eeddiittiinngg--mmooddee ((eemmaaccss)) Controls whether readline begins with a set of key bindings sim- ilar to _E_m_a_c_s or _v_i. eeddiittiinngg--mmooddee can be set to either eemmaaccss or vvii. eecchhoo--ccoonnttrrooll--cchhaarraacctteerrss ((OOnn)) - When set to OOnn, on operating systems that indicate they support + When set to OOnn, on operating systems that indicate they support it, readline echoes a character corresponding to a signal gener- ated from the keyboard. eennaabbllee--kkeeyyppaadd ((OOffff)) When set to OOnn, readline will try to enable the application key- - pad when it is called. Some systems need this to enable the + pad when it is called. Some systems need this to enable the arrow keys. eennaabbllee--mmeettaa--kkeeyy ((OOnn)) - When set to OOnn, readline will try to enable any meta modifier - key the terminal claims to support when it is called. On many + When set to OOnn, readline will try to enable any meta modifier + key the terminal claims to support when it is called. On many terminals, the meta key is used to send eight-bit characters. eexxppaanndd--ttiillddee ((OOffff)) - If set to OOnn, tilde expansion is performed when readline + If set to OOnn, tilde expansion is performed when readline attempts word completion. hhiissttoorryy--pprreesseerrvvee--ppooiinntt ((OOffff)) - If set to OOnn, the history code attempts to place point at the - same location on each history line retrieved with pprreevviioouuss--hhiiss-- + If set to OOnn, the history code attempts to place point at the + same location on each history line retrieved with pprreevviioouuss--hhiiss-- ttoorryy or nneexxtt--hhiissttoorryy. hhiissttoorryy--ssiizzee ((00)) - Set the maximum number of history entries saved in the history + Set the maximum number of history entries saved in the history list. If set to zero, the number of entries in the history list is not limited. hhoorriizzoonnttaall--ssccrroollll--mmooddee ((OOffff)) - When set to OOnn, makes readline use a single line for display, + When set to OOnn, makes readline use a single line for display, scrolling the input horizontally on a single screen line when it - becomes longer than the screen width rather than wrapping to a + becomes longer than the screen width rather than wrapping to a new line. iinnppuutt--mmeettaa ((OOffff)) - If set to OOnn, readline will enable eight-bit input (that is, it - will not strip the high bit from the characters it reads), + If set to OOnn, readline will enable eight-bit input (that is, it + will not strip the high bit from the characters it reads), regardless of what the terminal claims it can support. The name mmeettaa--ffllaagg is a synonym for this variable. iisseeaarrcchh--tteerrmmiinnaattoorrss ((````CC--[[CC--JJ'''')) - The string of characters that should terminate an incremental - search without subsequently executing the character as a com- - mand. If this variable has not been given a value, the charac- + The string of characters that should terminate an incremental + search without subsequently executing the character as a com- + mand. If this variable has not been given a value, the charac- ters _E_S_C and _C_-_J will terminate an incremental search. kkeeyymmaapp ((eemmaaccss)) - Set the current readline keymap. The set of valid keymap names - is _e_m_a_c_s_, _e_m_a_c_s_-_s_t_a_n_d_a_r_d_, _e_m_a_c_s_-_m_e_t_a_, _e_m_a_c_s_-_c_t_l_x_, _v_i_, _v_i_-_c_o_m_- - _m_a_n_d, and _v_i_-_i_n_s_e_r_t. _v_i is equivalent to _v_i_-_c_o_m_m_a_n_d; _e_m_a_c_s is - equivalent to _e_m_a_c_s_-_s_t_a_n_d_a_r_d. The default value is _e_m_a_c_s; the + Set the current readline keymap. The set of valid keymap names + is _e_m_a_c_s_, _e_m_a_c_s_-_s_t_a_n_d_a_r_d_, _e_m_a_c_s_-_m_e_t_a_, _e_m_a_c_s_-_c_t_l_x_, _v_i_, _v_i_-_c_o_m_- + _m_a_n_d, and _v_i_-_i_n_s_e_r_t. _v_i is equivalent to _v_i_-_c_o_m_m_a_n_d; _e_m_a_c_s is + equivalent to _e_m_a_c_s_-_s_t_a_n_d_a_r_d. The default value is _e_m_a_c_s; the value of eeddiittiinngg--mmooddee also affects the default keymap. mmaarrkk--ddiirreeccttoorriieess ((OOnn)) If set to OOnn, completed directory names have a slash appended. mmaarrkk--mmooddiiffiieedd--lliinneess ((OOffff)) - If set to OOnn, history lines that have been modified are dis- + If set to OOnn, history lines that have been modified are dis- played with a preceding asterisk (**). mmaarrkk--ssyymmlliinnkkeedd--ddiirreeccttoorriieess ((OOffff)) If set to OOnn, completed names which are symbolic links to direc- - tories have a slash appended (subject to the value of + tories have a slash appended (subject to the value of mmaarrkk--ddiirreeccttoorriieess). mmaattcchh--hhiiddddeenn--ffiilleess ((OOnn)) - This variable, when set to OOnn, causes readline to match files - whose names begin with a `.' (hidden files) when performing - filename completion. If set to OOffff, the leading `.' must be + This variable, when set to OOnn, causes readline to match files + whose names begin with a `.' (hidden files) when performing + filename completion. If set to OOffff, the leading `.' must be supplied by the user in the filename to be completed. mmeennuu--ccoommpplleettee--ddiissppllaayy--pprreeffiixx ((OOffff)) - If set to OOnn, menu completion displays the common prefix of the + If set to OOnn, menu completion displays the common prefix of the list of possible completions (which may be empty) before cycling through the list. oouuttppuutt--mmeettaa ((OOffff)) - If set to OOnn, readline will display characters with the eighth + If set to OOnn, readline will display characters with the eighth bit set directly rather than as a meta-prefixed escape sequence. ppaaggee--ccoommpplleettiioonnss ((OOnn)) - If set to OOnn, readline uses an internal _m_o_r_e-like pager to dis- + If set to OOnn, readline uses an internal _m_o_r_e-like pager to dis- play a screenful of possible completions at a time. pprriinntt--ccoommpplleettiioonnss--hhoorriizzoonnttaallllyy ((OOffff)) - If set to OOnn, readline will display completions with matches - sorted horizontally in alphabetical order, rather than down the + If set to OOnn, readline will display completions with matches + sorted horizontally in alphabetical order, rather than down the screen. rreevveerrtt--aallll--aatt--nneewwlliinnee ((OOffff)) - If set to OOnn, readline will undo all changes to history lines + If set to OOnn, readline will undo all changes to history lines before returning when aacccceepptt--lliinnee is executed. By default, his- - tory lines may be modified and retain individual undo lists + tory lines may be modified and retain individual undo lists across calls to rreeaaddlliinnee. sshhooww--aallll--iiff--aammbbiigguuoouuss ((OOffff)) - This alters the default behavior of the completion functions. + This alters the default behavior of the completion functions. If set to OOnn, words which have more than one possible completion - cause the matches to be listed immediately instead of ringing + cause the matches to be listed immediately instead of ringing the bell. sshhooww--aallll--iiff--uunnmmooddiiffiieedd ((OOffff)) - This alters the default behavior of the completion functions in + This alters the default behavior of the completion functions in a fashion similar to sshhooww--aallll--iiff--aammbbiigguuoouuss. If set to OOnn, words - which have more than one possible completion without any possi- - ble partial completion (the possible completions don't share a - common prefix) cause the matches to be listed immediately + which have more than one possible completion without any possi- + ble partial completion (the possible completions don't share a + common prefix) cause the matches to be listed immediately instead of ringing the bell. sskkiipp--ccoommpplleetteedd--tteexxtt ((OOffff)) - If set to OOnn, this alters the default completion behavior when - inserting a single match into the line. It's only active when - performing completion in the middle of a word. If enabled, - readline does not insert characters from the completion that - match characters after point in the word being completed, so + If set to OOnn, this alters the default completion behavior when + inserting a single match into the line. It's only active when + performing completion in the middle of a word. If enabled, + readline does not insert characters from the completion that + match characters after point in the word being completed, so portions of the word following the cursor are not duplicated. vviissiibbllee--ssttaattss ((OOffff)) - If set to OOnn, a character denoting a file's type as reported by - _s_t_a_t(2) is appended to the filename when listing possible com- + If set to OOnn, a character denoting a file's type as reported by + _s_t_a_t(2) is appended to the filename when listing possible com- pletions. RReeaaddlliinnee CCoonnddiittiioonnaall CCoonnssttrruuccttss - Readline implements a facility similar in spirit to the conditional - compilation features of the C preprocessor which allows key bindings - and variable settings to be performed as the result of tests. There + Readline implements a facility similar in spirit to the conditional + compilation features of the C preprocessor which allows key bindings + and variable settings to be performed as the result of tests. There are four parser directives used. - $$iiff The $$iiff construct allows bindings to be made based on the edit- - ing mode, the terminal being used, or the application using - readline. The text of the test extends to the end of the line; + $$iiff The $$iiff construct allows bindings to be made based on the edit- + ing mode, the terminal being used, or the application using + readline. The text of the test extends to the end of the line; no characters are required to isolate it. - mmooddee The mmooddee== form of the $$iiff directive is used to test - whether readline is in emacs or vi mode. This may be - used in conjunction with the sseett kkeeyymmaapp command, for - instance, to set bindings in the _e_m_a_c_s_-_s_t_a_n_d_a_r_d and - _e_m_a_c_s_-_c_t_l_x keymaps only if readline is starting out in + mmooddee The mmooddee== form of the $$iiff directive is used to test + whether readline is in emacs or vi mode. This may be + used in conjunction with the sseett kkeeyymmaapp command, for + instance, to set bindings in the _e_m_a_c_s_-_s_t_a_n_d_a_r_d and + _e_m_a_c_s_-_c_t_l_x keymaps only if readline is starting out in emacs mode. - tteerrmm The tteerrmm== form may be used to include terminal-specific + tteerrmm The tteerrmm== form may be used to include terminal-specific key bindings, perhaps to bind the key sequences output by the terminal's function keys. The word on the right side of the == is tested against the both full name of the ter- - minal and the portion of the terminal name before the - first --. This allows _s_u_n to match both _s_u_n and _s_u_n_-_c_m_d, + minal and the portion of the terminal name before the + first --. This allows _s_u_n to match both _s_u_n and _s_u_n_-_c_m_d, for instance. aapppplliiccaattiioonn The aapppplliiccaattiioonn construct is used to include application- specific settings. Each program using the readline - library sets the _a_p_p_l_i_c_a_t_i_o_n _n_a_m_e, and an initialization + library sets the _a_p_p_l_i_c_a_t_i_o_n _n_a_m_e, and an initialization file can test for a particular value. This could be used - to bind key sequences to functions useful for a specific - program. For instance, the following command adds a key - sequence that quotes the current or previous word in + to bind key sequences to functions useful for a specific + program. For instance, the following command adds a key + sequence that quotes the current or previous word in bbaasshh: $$iiff Bash @@ -2966,51 +2969,51 @@ RREEAADDLLIINNEE test fails. $$iinncclluuddee - This directive takes a single filename as an argument and reads - commands and bindings from that file. For example, the follow- + This directive takes a single filename as an argument and reads + commands and bindings from that file. For example, the follow- ing directive would read _/_e_t_c_/_i_n_p_u_t_r_c: $$iinncclluuddee _/_e_t_c_/_i_n_p_u_t_r_c SSeeaarrcchhiinngg - Readline provides commands for searching through the command history + Readline provides commands for searching through the command history (see HHIISSTTOORRYY below) for lines containing a specified string. There are two search modes: _i_n_c_r_e_m_e_n_t_a_l and _n_o_n_-_i_n_c_r_e_m_e_n_t_a_l. - Incremental searches begin before the user has finished typing the - search string. As each character of the search string is typed, read- + Incremental searches begin before the user has finished typing the + search string. As each character of the search string is typed, read- line displays the next entry from the history matching the string typed - so far. An incremental search requires only as many characters as - needed to find the desired history entry. The characters present in - the value of the iisseeaarrcchh--tteerrmmiinnaattoorrss variable are used to terminate an + so far. An incremental search requires only as many characters as + needed to find the desired history entry. The characters present in + the value of the iisseeaarrcchh--tteerrmmiinnaattoorrss variable are used to terminate an incremental search. If that variable has not been assigned a value the - Escape and Control-J characters will terminate an incremental search. - Control-G will abort an incremental search and restore the original - line. When the search is terminated, the history entry containing the + Escape and Control-J characters will terminate an incremental search. + Control-G will abort an incremental search and restore the original + line. When the search is terminated, the history entry containing the search string becomes the current line. - To find other matching entries in the history list, type Control-S or - Control-R as appropriate. This will search backward or forward in the - history for the next entry matching the search string typed so far. - Any other key sequence bound to a readline command will terminate the - search and execute that command. For instance, a _n_e_w_l_i_n_e will termi- + To find other matching entries in the history list, type Control-S or + Control-R as appropriate. This will search backward or forward in the + history for the next entry matching the search string typed so far. + Any other key sequence bound to a readline command will terminate the + search and execute that command. For instance, a _n_e_w_l_i_n_e will termi- nate the search and accept the line, thereby executing the command from the history list. Readline remembers the last incremental search string. If two Control- - Rs are typed without any intervening characters defining a new search + Rs are typed without any intervening characters defining a new search string, any remembered search string is used. - Non-incremental searches read the entire search string before starting - to search for matching history lines. The search string may be typed + Non-incremental searches read the entire search string before starting + to search for matching history lines. The search string may be typed by the user or be part of the contents of the current line. RReeaaddlliinnee CCoommmmaanndd NNaammeess - The following is a list of the names of the commands and the default + The following is a list of the names of the commands and the default key sequences to which they are bound. Command names without an accom- panying key sequence are unbound by default. In the following descrip- - tions, _p_o_i_n_t refers to the current cursor position, and _m_a_r_k refers to - a cursor position saved by the sseett--mmaarrkk command. The text between the + tions, _p_o_i_n_t refers to the current cursor position, and _m_a_r_k refers to + a cursor position saved by the sseett--mmaarrkk command. The text between the point and mark is referred to as the _r_e_g_i_o_n. CCoommmmaannddss ffoorr MMoovviinngg @@ -3026,17 +3029,17 @@ RREEAADDLLIINNEE Move forward to the end of the next word. Words are composed of alphanumeric characters (letters and digits). bbaacckkwwaarrdd--wwoorrdd ((MM--bb)) - Move back to the start of the current or previous word. Words + Move back to the start of the current or previous word. Words are composed of alphanumeric characters (letters and digits). sshheellll--ffoorrwwaarrdd--wwoorrdd - Move forward to the end of the next word. Words are delimited + Move forward to the end of the next word. Words are delimited by non-quoted shell metacharacters. sshheellll--bbaacckkwwaarrdd--wwoorrdd - Move back to the start of the current or previous word. Words + Move back to the start of the current or previous word. Words are delimited by non-quoted shell metacharacters. cclleeaarr--ssccrreeeenn ((CC--ll)) - Clear the screen leaving the current line at the top of the - screen. With an argument, refresh the current line without + Clear the screen leaving the current line at the top of the + screen. With an argument, refresh the current line without clearing the screen. rreeddrraaww--ccuurrrreenntt--lliinnee Refresh the current line. @@ -3044,136 +3047,136 @@ RREEAADDLLIINNEE CCoommmmaannddss ffoorr MMaanniippuullaattiinngg tthhee HHiissttoorryy aacccceepptt--lliinnee ((NNeewwlliinnee,, RReettuurrnn)) Accept the line regardless of where the cursor is. If this line - is non-empty, add it to the history list according to the state - of the HHIISSTTCCOONNTTRROOLL variable. If the line is a modified history + is non-empty, add it to the history list according to the state + of the HHIISSTTCCOONNTTRROOLL variable. If the line is a modified history line, then restore the history line to its original state. pprreevviioouuss--hhiissttoorryy ((CC--pp)) Fetch the previous command from the history list, moving back in the list. nneexxtt--hhiissttoorryy ((CC--nn)) - Fetch the next command from the history list, moving forward in + Fetch the next command from the history list, moving forward in the list. bbeeggiinnnniinngg--ooff--hhiissttoorryy ((MM--<<)) Move to the first line in the history. eenndd--ooff--hhiissttoorryy ((MM-->>)) - Move to the end of the input history, i.e., the line currently + Move to the end of the input history, i.e., the line currently being entered. rreevveerrssee--sseeaarrcchh--hhiissttoorryy ((CC--rr)) - Search backward starting at the current line and moving `up' - through the history as necessary. This is an incremental + Search backward starting at the current line and moving `up' + through the history as necessary. This is an incremental search. ffoorrwwaarrdd--sseeaarrcchh--hhiissttoorryy ((CC--ss)) - Search forward starting at the current line and moving `down' - through the history as necessary. This is an incremental + Search forward starting at the current line and moving `down' + through the history as necessary. This is an incremental search. nnoonn--iinnccrreemmeennttaall--rreevveerrssee--sseeaarrcchh--hhiissttoorryy ((MM--pp)) Search backward through the history starting at the current line - using a non-incremental search for a string supplied by the + using a non-incremental search for a string supplied by the user. nnoonn--iinnccrreemmeennttaall--ffoorrwwaarrdd--sseeaarrcchh--hhiissttoorryy ((MM--nn)) - Search forward through the history using a non-incremental + Search forward through the history using a non-incremental search for a string supplied by the user. hhiissttoorryy--sseeaarrcchh--ffoorrwwaarrdd - Search forward through the history for the string of characters - between the start of the current line and the point. This is a + Search forward through the history for the string of characters + between the start of the current line and the point. This is a non-incremental search. hhiissttoorryy--sseeaarrcchh--bbaacckkwwaarrdd Search backward through the history for the string of characters - between the start of the current line and the point. This is a + between the start of the current line and the point. This is a non-incremental search. yyaannkk--nntthh--aarrgg ((MM--CC--yy)) - Insert the first argument to the previous command (usually the + Insert the first argument to the previous command (usually the second word on the previous line) at point. With an argument _n, - insert the _nth word from the previous command (the words in the - previous command begin with word 0). A negative argument + insert the _nth word from the previous command (the words in the + previous command begin with word 0). A negative argument inserts the _nth word from the end of the previous command. Once - the argument _n is computed, the argument is extracted as if the + the argument _n is computed, the argument is extracted as if the "!_n" history expansion had been specified. yyaannkk--llaasstt--aarrgg ((MM--..,, MM--__)) - Insert the last argument to the previous command (the last word + Insert the last argument to the previous command (the last word of the previous history entry). With a numeric argument, behave - exactly like yyaannkk--nntthh--aarrgg. Successive calls to yyaannkk--llaasstt--aarrgg - move back through the history list, inserting the last word (or - the word specified by the argument to the first call) of each + exactly like yyaannkk--nntthh--aarrgg. Successive calls to yyaannkk--llaasstt--aarrgg + move back through the history list, inserting the last word (or + the word specified by the argument to the first call) of each line in turn. Any numeric argument supplied to these successive - calls determines the direction to move through the history. A - negative argument switches the direction through the history + calls determines the direction to move through the history. A + negative argument switches the direction through the history (back or forward). The history expansion facilities are used to - extract the last argument, as if the "!$" history expansion had + extract the last argument, as if the "!$" history expansion had been specified. sshheellll--eexxppaanndd--lliinnee ((MM--CC--ee)) Expand the line as the shell does. This performs alias and his- tory expansion as well as all of the shell word expansions. See - HHIISSTTOORRYY EEXXPPAANNSSIIOONN below for a description of history expansion. + HHIISSTTOORRYY EEXXPPAANNSSIIOONN below for a description of history expansion. hhiissttoorryy--eexxppaanndd--lliinnee ((MM--^^)) - Perform history expansion on the current line. See HHIISSTTOORRYY + Perform history expansion on the current line. See HHIISSTTOORRYY EEXXPPAANNSSIIOONN below for a description of history expansion. mmaaggiicc--ssppaaccee - Perform history expansion on the current line and insert a + Perform history expansion on the current line and insert a space. See HHIISSTTOORRYY EEXXPPAANNSSIIOONN below for a description of history expansion. aalliiaass--eexxppaanndd--lliinnee - Perform alias expansion on the current line. See AALLIIAASSEESS above + Perform alias expansion on the current line. See AALLIIAASSEESS above for a description of alias expansion. hhiissttoorryy--aanndd--aalliiaass--eexxppaanndd--lliinnee Perform history and alias expansion on the current line. iinnsseerrtt--llaasstt--aarrgguummeenntt ((MM--..,, MM--__)) A synonym for yyaannkk--llaasstt--aarrgg. ooppeerraattee--aanndd--ggeett--nneexxtt ((CC--oo)) - Accept the current line for execution and fetch the next line - relative to the current line from the history for editing. Any + Accept the current line for execution and fetch the next line + relative to the current line from the history for editing. Any argument is ignored. eeddiitt--aanndd--eexxeeccuuttee--ccoommmmaanndd ((CC--xxCC--ee)) - Invoke an editor on the current command line, and execute the - result as shell commands. BBaasshh attempts to invoke $$VVIISSUUAALL, + Invoke an editor on the current command line, and execute the + result as shell commands. BBaasshh attempts to invoke $$VVIISSUUAALL, $$EEDDIITTOORR, and _e_m_a_c_s as the editor, in that order. CCoommmmaannddss ffoorr CChhaannggiinngg TTeexxtt ddeelleettee--cchhaarr ((CC--dd)) - Delete the character at point. If point is at the beginning of - the line, there are no characters in the line, and the last + Delete the character at point. If point is at the beginning of + the line, there are no characters in the line, and the last character typed was not bound to ddeelleettee--cchhaarr, then return EEOOFF. bbaacckkwwaarrdd--ddeelleettee--cchhaarr ((RRuubboouutt)) - Delete the character behind the cursor. When given a numeric + Delete the character behind the cursor. When given a numeric argument, save the deleted text on the kill ring. ffoorrwwaarrdd--bbaacckkwwaarrdd--ddeelleettee--cchhaarr - Delete the character under the cursor, unless the cursor is at + Delete the character under the cursor, unless the cursor is at the end of the line, in which case the character behind the cur- sor is deleted. qquuootteedd--iinnsseerrtt ((CC--qq,, CC--vv)) - Add the next character typed to the line verbatim. This is how + Add the next character typed to the line verbatim. This is how to insert characters like CC--qq, for example. ttaabb--iinnsseerrtt ((CC--vv TTAABB)) Insert a tab character. sseellff--iinnsseerrtt ((aa,, bb,, AA,, 11,, !!,, ......)) Insert the character typed. ttrraannssppoossee--cchhaarrss ((CC--tt)) - Drag the character before point forward over the character at - point, moving point forward as well. If point is at the end of - the line, then this transposes the two characters before point. + Drag the character before point forward over the character at + point, moving point forward as well. If point is at the end of + the line, then this transposes the two characters before point. Negative arguments have no effect. ttrraannssppoossee--wwoorrddss ((MM--tt)) - Drag the word before point past the word after point, moving - point over that word as well. If point is at the end of the + Drag the word before point past the word after point, moving + point over that word as well. If point is at the end of the line, this transposes the last two words on the line. uuppccaassee--wwoorrdd ((MM--uu)) - Uppercase the current (or following) word. With a negative + Uppercase the current (or following) word. With a negative argument, uppercase the previous word, but do not move point. ddoowwnnccaassee--wwoorrdd ((MM--ll)) - Lowercase the current (or following) word. With a negative + Lowercase the current (or following) word. With a negative argument, lowercase the previous word, but do not move point. ccaappiittaalliizzee--wwoorrdd ((MM--cc)) - Capitalize the current (or following) word. With a negative + Capitalize the current (or following) word. With a negative argument, capitalize the previous word, but do not move point. oovveerrwwrriittee--mmooddee - Toggle overwrite mode. With an explicit positive numeric argu- + Toggle overwrite mode. With an explicit positive numeric argu- ment, switches to overwrite mode. With an explicit non-positive numeric argument, switches to insert mode. This command affects - only eemmaaccss mode; vvii mode does overwrite differently. Each call + only eemmaaccss mode; vvii mode does overwrite differently. Each call to _r_e_a_d_l_i_n_e_(_) starts in insert mode. In overwrite mode, charac- - ters bound to sseellff--iinnsseerrtt replace the text at point rather than - pushing the text to the right. Characters bound to bbaacckk-- - wwaarrdd--ddeelleettee--cchhaarr replace the character before point with a + ters bound to sseellff--iinnsseerrtt replace the text at point rather than + pushing the text to the right. Characters bound to bbaacckk-- + wwaarrdd--ddeelleettee--cchhaarr replace the character before point with a space. By default, this command is unbound. KKiilllliinngg aanndd YYaannkkiinngg @@ -3182,31 +3185,31 @@ RREEAADDLLIINNEE bbaacckkwwaarrdd--kkiillll--lliinnee ((CC--xx RRuubboouutt)) Kill backward to the beginning of the line. uunniixx--lliinnee--ddiissccaarrdd ((CC--uu)) - Kill backward from point to the beginning of the line. The + Kill backward from point to the beginning of the line. The killed text is saved on the kill-ring. kkiillll--wwhhoollee--lliinnee - Kill all characters on the current line, no matter where point + Kill all characters on the current line, no matter where point is. kkiillll--wwoorrdd ((MM--dd)) - Kill from point to the end of the current word, or if between - words, to the end of the next word. Word boundaries are the + Kill from point to the end of the current word, or if between + words, to the end of the next word. Word boundaries are the same as those used by ffoorrwwaarrdd--wwoorrdd. bbaacckkwwaarrdd--kkiillll--wwoorrdd ((MM--RRuubboouutt)) - Kill the word behind point. Word boundaries are the same as + Kill the word behind point. Word boundaries are the same as those used by bbaacckkwwaarrdd--wwoorrdd. sshheellll--kkiillll--wwoorrdd ((MM--dd)) - Kill from point to the end of the current word, or if between - words, to the end of the next word. Word boundaries are the + Kill from point to the end of the current word, or if between + words, to the end of the next word. Word boundaries are the same as those used by sshheellll--ffoorrwwaarrdd--wwoorrdd. sshheellll--bbaacckkwwaarrdd--kkiillll--wwoorrdd ((MM--RRuubboouutt)) - Kill the word behind point. Word boundaries are the same as + Kill the word behind point. Word boundaries are the same as those used by sshheellll--bbaacckkwwaarrdd--wwoorrdd. uunniixx--wwoorrdd--rruubboouutt ((CC--ww)) - Kill the word behind point, using white space as a word bound- + Kill the word behind point, using white space as a word bound- ary. The killed text is saved on the kill-ring. uunniixx--ffiilleennaammee--rruubboouutt - Kill the word behind point, using white space and the slash - character as the word boundaries. The killed text is saved on + Kill the word behind point, using white space and the slash + character as the word boundaries. The killed text is saved on the kill-ring. ddeelleettee--hhoorriizzoonnttaall--ssppaaccee ((MM--\\)) Delete all spaces and tabs around point. @@ -3215,65 +3218,65 @@ RREEAADDLLIINNEE ccooppyy--rreeggiioonn--aass--kkiillll Copy the text in the region to the kill buffer. ccooppyy--bbaacckkwwaarrdd--wwoorrdd - Copy the word before point to the kill buffer. The word bound- + Copy the word before point to the kill buffer. The word bound- aries are the same as bbaacckkwwaarrdd--wwoorrdd. ccooppyy--ffoorrwwaarrdd--wwoorrdd - Copy the word following point to the kill buffer. The word + Copy the word following point to the kill buffer. The word boundaries are the same as ffoorrwwaarrdd--wwoorrdd. yyaannkk ((CC--yy)) Yank the top of the kill ring into the buffer at point. yyaannkk--ppoopp ((MM--yy)) - Rotate the kill ring, and yank the new top. Only works follow- + Rotate the kill ring, and yank the new top. Only works follow- ing yyaannkk or yyaannkk--ppoopp. NNuummeerriicc AArrgguummeennttss ddiiggiitt--aarrgguummeenntt ((MM--00,, MM--11,, ......,, MM----)) - Add this digit to the argument already accumulating, or start a + Add this digit to the argument already accumulating, or start a new argument. M-- starts a negative argument. uunniivveerrssaall--aarrgguummeenntt - This is another way to specify an argument. If this command is - followed by one or more digits, optionally with a leading minus - sign, those digits define the argument. If the command is fol- - lowed by digits, executing uunniivveerrssaall--aarrgguummeenntt again ends the - numeric argument, but is otherwise ignored. As a special case, - if this command is immediately followed by a character that is - neither a digit or minus sign, the argument count for the next - command is multiplied by four. The argument count is initially - one, so executing this function the first time makes the argu- + This is another way to specify an argument. If this command is + followed by one or more digits, optionally with a leading minus + sign, those digits define the argument. If the command is fol- + lowed by digits, executing uunniivveerrssaall--aarrgguummeenntt again ends the + numeric argument, but is otherwise ignored. As a special case, + if this command is immediately followed by a character that is + neither a digit or minus sign, the argument count for the next + command is multiplied by four. The argument count is initially + one, so executing this function the first time makes the argu- ment count four, a second time makes the argument count sixteen, and so on. CCoommpplleettiinngg ccoommpplleettee ((TTAABB)) - Attempt to perform completion on the text before point. BBaasshh + Attempt to perform completion on the text before point. BBaasshh attempts completion treating the text as a variable (if the text - begins with $$), username (if the text begins with ~~), hostname - (if the text begins with @@), or command (including aliases and + begins with $$), username (if the text begins with ~~), hostname + (if the text begins with @@), or command (including aliases and functions) in turn. If none of these produces a match, filename completion is attempted. ppoossssiibbllee--ccoommpplleettiioonnss ((MM--??)) List the possible completions of the text before point. iinnsseerrtt--ccoommpplleettiioonnss ((MM--**)) - Insert all completions of the text before point that would have + Insert all completions of the text before point that would have been generated by ppoossssiibbllee--ccoommpplleettiioonnss. mmeennuu--ccoommpplleettee - Similar to ccoommpplleettee, but replaces the word to be completed with - a single match from the list of possible completions. Repeated - execution of mmeennuu--ccoommpplleettee steps through the list of possible - completions, inserting each match in turn. At the end of the + Similar to ccoommpplleettee, but replaces the word to be completed with + a single match from the list of possible completions. Repeated + execution of mmeennuu--ccoommpplleettee steps through the list of possible + completions, inserting each match in turn. At the end of the list of completions, the bell is rung (subject to the setting of bbeellll--ssttyyllee) and the original text is restored. An argument of _n - moves _n positions forward in the list of matches; a negative - argument may be used to move backward through the list. This - command is intended to be bound to TTAABB, but is unbound by + moves _n positions forward in the list of matches; a negative + argument may be used to move backward through the list. This + command is intended to be bound to TTAABB, but is unbound by default. mmeennuu--ccoommpplleettee--bbaacckkwwaarrdd - Identical to mmeennuu--ccoommpplleettee, but moves backward through the list - of possible completions, as if mmeennuu--ccoommpplleettee had been given a + Identical to mmeennuu--ccoommpplleettee, but moves backward through the list + of possible completions, as if mmeennuu--ccoommpplleettee had been given a negative argument. This command is unbound by default. ddeelleettee--cchhaarr--oorr--lliisstt - Deletes the character under the cursor if not at the beginning - or end of the line (like ddeelleettee--cchhaarr). If at the end of the + Deletes the character under the cursor if not at the beginning + or end of the line (like ddeelleettee--cchhaarr). If at the end of the line, behaves identically to ppoossssiibbllee--ccoommpplleettiioonnss. This command is unbound by default. ccoommpplleettee--ffiilleennaammee ((MM--//)) @@ -3282,213 +3285,213 @@ RREEAADDLLIINNEE List the possible completions of the text before point, treating it as a filename. ccoommpplleettee--uusseerrnnaammee ((MM--~~)) - Attempt completion on the text before point, treating it as a + Attempt completion on the text before point, treating it as a username. ppoossssiibbllee--uusseerrnnaammee--ccoommpplleettiioonnss ((CC--xx ~~)) List the possible completions of the text before point, treating it as a username. ccoommpplleettee--vvaarriiaabbllee ((MM--$$)) - Attempt completion on the text before point, treating it as a + Attempt completion on the text before point, treating it as a shell variable. ppoossssiibbllee--vvaarriiaabbllee--ccoommpplleettiioonnss ((CC--xx $$)) List the possible completions of the text before point, treating it as a shell variable. ccoommpplleettee--hhoossttnnaammee ((MM--@@)) - Attempt completion on the text before point, treating it as a + Attempt completion on the text before point, treating it as a hostname. ppoossssiibbllee--hhoossttnnaammee--ccoommpplleettiioonnss ((CC--xx @@)) List the possible completions of the text before point, treating it as a hostname. ccoommpplleettee--ccoommmmaanndd ((MM--!!)) - Attempt completion on the text before point, treating it as a - command name. Command completion attempts to match the text - against aliases, reserved words, shell functions, shell + Attempt completion on the text before point, treating it as a + command name. Command completion attempts to match the text + against aliases, reserved words, shell functions, shell builtins, and finally executable filenames, in that order. ppoossssiibbllee--ccoommmmaanndd--ccoommpplleettiioonnss ((CC--xx !!)) List the possible completions of the text before point, treating it as a command name. ddyynnaammiicc--ccoommpplleettee--hhiissttoorryy ((MM--TTAABB)) - Attempt completion on the text before point, comparing the text - against lines from the history list for possible completion + Attempt completion on the text before point, comparing the text + against lines from the history list for possible completion matches. ddaabbbbrreevv--eexxppaanndd - Attempt menu completion on the text before point, comparing the + Attempt menu completion on the text before point, comparing the text against lines from the history list for possible completion matches. ccoommpplleettee--iinnttoo--bbrraacceess ((MM--{{)) Perform filename completion and insert the list of possible com- - pletions enclosed within braces so the list is available to the + pletions enclosed within braces so the list is available to the shell (see BBrraaccee EExxppaannssiioonn above). KKeeyybbooaarrdd MMaaccrrooss ssttaarrtt--kkbbdd--mmaaccrroo ((CC--xx (()) - Begin saving the characters typed into the current keyboard + Begin saving the characters typed into the current keyboard macro. eenndd--kkbbdd--mmaaccrroo ((CC--xx )))) Stop saving the characters typed into the current keyboard macro and store the definition. ccaallll--llaasstt--kkbbdd--mmaaccrroo ((CC--xx ee)) - Re-execute the last keyboard macro defined, by making the char- + Re-execute the last keyboard macro defined, by making the char- acters in the macro appear as if typed at the keyboard. MMiisscceellllaanneeoouuss rree--rreeaadd--iinniitt--ffiillee ((CC--xx CC--rr)) - Read in the contents of the _i_n_p_u_t_r_c file, and incorporate any + Read in the contents of the _i_n_p_u_t_r_c file, and incorporate any bindings or variable assignments found there. aabboorrtt ((CC--gg)) - Abort the current editing command and ring the terminal's bell + Abort the current editing command and ring the terminal's bell (subject to the setting of bbeellll--ssttyyllee). ddoo--uuppppeerrccaassee--vveerrssiioonn ((MM--aa,, MM--bb,, MM--_x,, ......)) - If the metafied character _x is lowercase, run the command that + If the metafied character _x is lowercase, run the command that is bound to the corresponding uppercase character. pprreeffiixx--mmeettaa ((EESSCC)) Metafy the next character typed. EESSCC ff is equivalent to MMeettaa--ff. uunnddoo ((CC--__,, CC--xx CC--uu)) Incremental undo, separately remembered for each line. rreevveerrtt--lliinnee ((MM--rr)) - Undo all changes made to this line. This is like executing the - uunnddoo command enough times to return the line to its initial + Undo all changes made to this line. This is like executing the + uunnddoo command enough times to return the line to its initial state. ttiillddee--eexxppaanndd ((MM--&&)) Perform tilde expansion on the current word. sseett--mmaarrkk ((CC--@@,, MM--<>)) - Set the mark to the point. If a numeric argument is supplied, + Set the mark to the point. If a numeric argument is supplied, the mark is set to that position. eexxcchhaannggee--ppooiinntt--aanndd--mmaarrkk ((CC--xx CC--xx)) - Swap the point with the mark. The current cursor position is - set to the saved position, and the old cursor position is saved + Swap the point with the mark. The current cursor position is + set to the saved position, and the old cursor position is saved as the mark. cchhaarraacctteerr--sseeaarrcchh ((CC--]])) A character is read and point is moved to the next occurrence of - that character. A negative count searches for previous occur- + that character. A negative count searches for previous occur- rences. cchhaarraacctteerr--sseeaarrcchh--bbaacckkwwaarrdd ((MM--CC--]])) - A character is read and point is moved to the previous occur- - rence of that character. A negative count searches for subse- + A character is read and point is moved to the previous occur- + rence of that character. A negative count searches for subse- quent occurrences. sskkiipp--ccssii--sseeqquueennccee - Read enough characters to consume a multi-key sequence such as - those defined for keys like Home and End. Such sequences begin + Read enough characters to consume a multi-key sequence such as + those defined for keys like Home and End. Such sequences begin with a Control Sequence Indicator (CSI), usually ESC-[. If this - sequence is bound to "\[", keys producing such sequences will - have no effect unless explicitly bound to a readline command, - instead of inserting stray characters into the editing buffer. + sequence is bound to "\[", keys producing such sequences will + have no effect unless explicitly bound to a readline command, + instead of inserting stray characters into the editing buffer. This is unbound by default, but usually bound to ESC-[. iinnsseerrtt--ccoommmmeenntt ((MM--##)) - Without a numeric argument, the value of the readline ccoomm-- - mmeenntt--bbeeggiinn variable is inserted at the beginning of the current + Without a numeric argument, the value of the readline ccoomm-- + mmeenntt--bbeeggiinn variable is inserted at the beginning of the current line. If a numeric argument is supplied, this command acts as a - toggle: if the characters at the beginning of the line do not - match the value of ccoommmmeenntt--bbeeggiinn, the value is inserted, other- + toggle: if the characters at the beginning of the line do not + match the value of ccoommmmeenntt--bbeeggiinn, the value is inserted, other- wise the characters in ccoommmmeenntt--bbeeggiinn are deleted from the begin- - ning of the line. In either case, the line is accepted as if a - newline had been typed. The default value of ccoommmmeenntt--bbeeggiinn - causes this command to make the current line a shell comment. - If a numeric argument causes the comment character to be + ning of the line. In either case, the line is accepted as if a + newline had been typed. The default value of ccoommmmeenntt--bbeeggiinn + causes this command to make the current line a shell comment. + If a numeric argument causes the comment character to be removed, the line will be executed by the shell. gglloobb--ccoommpplleettee--wwoorrdd ((MM--gg)) - The word before point is treated as a pattern for pathname - expansion, with an asterisk implicitly appended. This pattern - is used to generate a list of matching filenames for possible + The word before point is treated as a pattern for pathname + expansion, with an asterisk implicitly appended. This pattern + is used to generate a list of matching filenames for possible completions. gglloobb--eexxppaanndd--wwoorrdd ((CC--xx **)) - The word before point is treated as a pattern for pathname - expansion, and the list of matching filenames is inserted, - replacing the word. If a numeric argument is supplied, an + The word before point is treated as a pattern for pathname + expansion, and the list of matching filenames is inserted, + replacing the word. If a numeric argument is supplied, an asterisk is appended before pathname expansion. gglloobb--lliisstt--eexxppaannssiioonnss ((CC--xx gg)) - The list of expansions that would have been generated by - gglloobb--eexxppaanndd--wwoorrdd is displayed, and the line is redrawn. If a - numeric argument is supplied, an asterisk is appended before + The list of expansions that would have been generated by + gglloobb--eexxppaanndd--wwoorrdd is displayed, and the line is redrawn. If a + numeric argument is supplied, an asterisk is appended before pathname expansion. dduummpp--ffuunnccttiioonnss - Print all of the functions and their key bindings to the read- + Print all of the functions and their key bindings to the read- line output stream. If a numeric argument is supplied, the out- - put is formatted in such a way that it can be made part of an + put is formatted in such a way that it can be made part of an _i_n_p_u_t_r_c file. dduummpp--vvaarriiaabblleess Print all of the settable readline variables and their values to - the readline output stream. If a numeric argument is supplied, - the output is formatted in such a way that it can be made part + the readline output stream. If a numeric argument is supplied, + the output is formatted in such a way that it can be made part of an _i_n_p_u_t_r_c file. dduummpp--mmaaccrrooss - Print all of the readline key sequences bound to macros and the - strings they output. If a numeric argument is supplied, the + Print all of the readline key sequences bound to macros and the + strings they output. If a numeric argument is supplied, the output is formatted in such a way that it can be made part of an _i_n_p_u_t_r_c file. ddiissppllaayy--sshheellll--vveerrssiioonn ((CC--xx CC--vv)) - Display version information about the current instance of bbaasshh. + Display version information about the current instance of bbaasshh. PPrrooggrraammmmaabbllee CCoommpplleettiioonn - When word completion is attempted for an argument to a command for - which a completion specification (a _c_o_m_p_s_p_e_c) has been defined using - the ccoommpplleettee builtin (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below), the pro- + When word completion is attempted for an argument to a command for + which a completion specification (a _c_o_m_p_s_p_e_c) has been defined using + the ccoommpplleettee builtin (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below), the pro- grammable completion facilities are invoked. - First, the command name is identified. If the command word is the - empty string (completion attempted at the beginning of an empty line), - any compspec defined with the --EE option to ccoommpplleettee is used. If a - compspec has been defined for that command, the compspec is used to + First, the command name is identified. If the command word is the + empty string (completion attempted at the beginning of an empty line), + any compspec defined with the --EE option to ccoommpplleettee is used. If a + compspec has been defined for that command, the compspec is used to generate the list of possible completions for the word. If the command - word is a full pathname, a compspec for the full pathname is searched - for first. If no compspec is found for the full pathname, an attempt - is made to find a compspec for the portion following the final slash. - If those searches do not result in a compspec, any compspec defined + word is a full pathname, a compspec for the full pathname is searched + for first. If no compspec is found for the full pathname, an attempt + is made to find a compspec for the portion following the final slash. + If those searches do not result in a compspec, any compspec defined with the --DD option to ccoommpplleettee is used as the default. - Once a compspec has been found, it is used to generate the list of - matching words. If a compspec is not found, the default bbaasshh comple- + Once a compspec has been found, it is used to generate the list of + matching words. If a compspec is not found, the default bbaasshh comple- tion as described above under CCoommpplleettiinngg is performed. - First, the actions specified by the compspec are used. Only matches - which are prefixed by the word being completed are returned. When the - --ff or --dd option is used for filename or directory name completion, the + First, the actions specified by the compspec are used. Only matches + which are prefixed by the word being completed are returned. When the + --ff or --dd option is used for filename or directory name completion, the shell variable FFIIGGNNOORREE is used to filter the matches. - Any completions specified by a pathname expansion pattern to the --GG + Any completions specified by a pathname expansion pattern to the --GG option are generated next. The words generated by the pattern need not - match the word being completed. The GGLLOOBBIIGGNNOORREE shell variable is not + match the word being completed. The GGLLOOBBIIGGNNOORREE shell variable is not used to filter the matches, but the FFIIGGNNOORREE variable is used. - Next, the string specified as the argument to the --WW option is consid- - ered. The string is first split using the characters in the IIFFSS spe- - cial variable as delimiters. Shell quoting is honored. Each word is - then expanded using brace expansion, tilde expansion, parameter and - variable expansion, command substitution, and arithmetic expansion, as + Next, the string specified as the argument to the --WW option is consid- + ered. The string is first split using the characters in the IIFFSS spe- + cial variable as delimiters. Shell quoting is honored. Each word is + then expanded using brace expansion, tilde expansion, parameter and + variable expansion, command substitution, and arithmetic expansion, as described above under EEXXPPAANNSSIIOONN. The results are split using the rules described above under WWoorrdd SSpplliittttiinngg. The results of the expansion are prefix-matched against the word being completed, and the matching words become the possible completions. - After these matches have been generated, any shell function or command - specified with the --FF and --CC options is invoked. When the command or + After these matches have been generated, any shell function or command + specified with the --FF and --CC options is invoked. When the command or function is invoked, the CCOOMMPP__LLIINNEE, CCOOMMPP__PPOOIINNTT, CCOOMMPP__KKEEYY, and CCOOMMPP__TTYYPPEE variables are assigned values as described above under SShheellll VVaarriiaabblleess. - If a shell function is being invoked, the CCOOMMPP__WWOORRDDSS and CCOOMMPP__CCWWOORRDD - variables are also set. When the function or command is invoked, the - first argument is the name of the command whose arguments are being - completed, the second argument is the word being completed, and the - third argument is the word preceding the word being completed on the - current command line. No filtering of the generated completions - against the word being completed is performed; the function or command + If a shell function is being invoked, the CCOOMMPP__WWOORRDDSS and CCOOMMPP__CCWWOORRDD + variables are also set. When the function or command is invoked, the + first argument is the name of the command whose arguments are being + completed, the second argument is the word being completed, and the + third argument is the word preceding the word being completed on the + current command line. No filtering of the generated completions + against the word being completed is performed; the function or command has complete freedom in generating the matches. - Any function specified with --FF is invoked first. The function may use - any of the shell facilities, including the ccoommppggeenn builtin described - below, to generate the matches. It must put the possible completions + Any function specified with --FF is invoked first. The function may use + any of the shell facilities, including the ccoommppggeenn builtin described + below, to generate the matches. It must put the possible completions in the CCOOMMPPRREEPPLLYY array variable. - Next, any command specified with the --CC option is invoked in an envi- - ronment equivalent to command substitution. It should print a list of - completions, one per line, to the standard output. Backslash may be + Next, any command specified with the --CC option is invoked in an envi- + ronment equivalent to command substitution. It should print a list of + completions, one per line, to the standard output. Backslash may be used to escape a newline, if necessary. - After all of the possible completions are generated, any filter speci- - fied with the --XX option is applied to the list. The filter is a pat- - tern as used for pathname expansion; a && in the pattern is replaced - with the text of the word being completed. A literal && may be escaped - with a backslash; the backslash is removed before attempting a match. - Any completion that matches the pattern will be removed from the list. + After all of the possible completions are generated, any filter speci- + fied with the --XX option is applied to the list. The filter is a pat- + tern as used for pathname expansion; a && in the pattern is replaced + with the text of the word being completed. A literal && may be escaped + with a backslash; the backslash is removed before attempting a match. + Any completion that matches the pattern will be removed from the list. A leading !! negates the pattern; in this case any completion not match- ing the pattern will be removed. @@ -3496,44 +3499,44 @@ RREEAADDLLIINNEE added to each member of the completion list, and the result is returned to the readline completion code as the list of possible completions. - If the previously-applied actions do not generate any matches, and the - --oo ddiirrnnaammeess option was supplied to ccoommpplleettee when the compspec was + If the previously-applied actions do not generate any matches, and the + --oo ddiirrnnaammeess option was supplied to ccoommpplleettee when the compspec was defined, directory name completion is attempted. - If the --oo pplluussddiirrss option was supplied to ccoommpplleettee when the compspec + If the --oo pplluussddiirrss option was supplied to ccoommpplleettee when the compspec was defined, directory name completion is attempted and any matches are added to the results of the other actions. - By default, if a compspec is found, whatever it generates is returned - to the completion code as the full set of possible completions. The + By default, if a compspec is found, whatever it generates is returned + to the completion code as the full set of possible completions. The default bbaasshh completions are not attempted, and the readline default of filename completion is disabled. If the --oo bbaasshhddeeffaauulltt option was sup- - plied to ccoommpplleettee when the compspec was defined, the bbaasshh default com- + plied to ccoommpplleettee when the compspec was defined, the bbaasshh default com- pletions are attempted if the compspec generates no matches. If the --oo - ddeeffaauulltt option was supplied to ccoommpplleettee when the compspec was defined, - readline's default completion will be performed if the compspec (and, + ddeeffaauulltt option was supplied to ccoommpplleettee when the compspec was defined, + readline's default completion will be performed if the compspec (and, if attempted, the default bbaasshh completions) generate no matches. - When a compspec indicates that directory name completion is desired, - the programmable completion functions force readline to append a slash - to completed names which are symbolic links to directories, subject to - the value of the mmaarrkk--ddiirreeccttoorriieess readline variable, regardless of the + When a compspec indicates that directory name completion is desired, + the programmable completion functions force readline to append a slash + to completed names which are symbolic links to directories, subject to + the value of the mmaarrkk--ddiirreeccttoorriieess readline variable, regardless of the setting of the mmaarrkk--ssyymmlliinnkkeedd--ddiirreeccttoorriieess readline variable. - There is some support for dynamically modifying completions. This is - most useful when used in combination with a default completion speci- - fied with ccoommpplleettee --DD. It's possible for shell functions executed as - completion handlers to indicate that completion should be retried by - returning an exit status of 124. If a shell function returns 124, and + There is some support for dynamically modifying completions. This is + most useful when used in combination with a default completion speci- + fied with ccoommpplleettee --DD. It's possible for shell functions executed as + completion handlers to indicate that completion should be retried by + returning an exit status of 124. If a shell function returns 124, and changes the compspec associated with the command on which completion is - being attempted (supplied as the first argument when the function is + being attempted (supplied as the first argument when the function is executed), programmable completion restarts from the beginning, with an - attempt to find a new compspec for that command. This allows a set of - completions to be built dynamically as completion is attempted, rather + attempt to find a new compspec for that command. This allows a set of + completions to be built dynamically as completion is attempted, rather than being loaded all at once. - For instance, assuming that there is a library of compspecs, each kept - in a file corresponding to the name of the command, the following + For instance, assuming that there is a library of compspecs, each kept + in a file corresponding to the name of the command, the following default completion function would load completions dynamically: _completion_loader() @@ -3544,135 +3547,135 @@ RREEAADDLLIINNEE HHIISSTTOORRYY - When the --oo hhiissttoorryy option to the sseett builtin is enabled, the shell + When the --oo hhiissttoorryy option to the sseett builtin is enabled, the shell provides access to the _c_o_m_m_a_n_d _h_i_s_t_o_r_y, the list of commands previously - typed. The value of the HHIISSTTSSIIZZEE variable is used as the number of + typed. The value of the HHIISSTTSSIIZZEE variable is used as the number of commands to save in a history list. The text of the last HHIISSTTSSIIZZEE com- - mands (default 500) is saved. The shell stores each command in the - history list prior to parameter and variable expansion (see EEXXPPAANNSSIIOONN - above) but after history expansion is performed, subject to the values + mands (default 500) is saved. The shell stores each command in the + history list prior to parameter and variable expansion (see EEXXPPAANNSSIIOONN + above) but after history expansion is performed, subject to the values of the shell variables HHIISSTTIIGGNNOORREE and HHIISSTTCCOONNTTRROOLL. On startup, the history is initialized from the file named by the vari- - able HHIISSTTFFIILLEE (default _~_/_._b_a_s_h___h_i_s_t_o_r_y). The file named by the value - of HHIISSTTFFIILLEE is truncated, if necessary, to contain no more than the - number of lines specified by the value of HHIISSTTFFIILLEESSIIZZEE. When the his- - tory file is read, lines beginning with the history comment character - followed immediately by a digit are interpreted as timestamps for the - preceding history line. These timestamps are optionally displayed - depending on the value of the HHIISSTTTTIIMMEEFFOORRMMAATT variable. When an inter- - active shell exits, the last $$HHIISSTTSSIIZZEE lines are copied from the his- + able HHIISSTTFFIILLEE (default _~_/_._b_a_s_h___h_i_s_t_o_r_y). The file named by the value + of HHIISSTTFFIILLEE is truncated, if necessary, to contain no more than the + number of lines specified by the value of HHIISSTTFFIILLEESSIIZZEE. When the his- + tory file is read, lines beginning with the history comment character + followed immediately by a digit are interpreted as timestamps for the + preceding history line. These timestamps are optionally displayed + depending on the value of the HHIISSTTTTIIMMEEFFOORRMMAATT variable. When an inter- + active shell exits, the last $$HHIISSTTSSIIZZEE lines are copied from the his- tory list to $$HHIISSTTFFIILLEE. If the hhiissttaappppeenndd shell option is enabled (see the description of sshhoopptt under SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below), the lines - are appended to the history file, otherwise the history file is over- - written. If HHIISSTTFFIILLEE is unset, or if the history file is unwritable, - the history is not saved. If the HHIISSTTTTIIMMEEFFOORRMMAATT variable is set, time + are appended to the history file, otherwise the history file is over- + written. If HHIISSTTFFIILLEE is unset, or if the history file is unwritable, + the history is not saved. If the HHIISSTTTTIIMMEEFFOORRMMAATT variable is set, time stamps are written to the history file, marked with the history comment - character, so they may be preserved across shell sessions. This uses + character, so they may be preserved across shell sessions. This uses the history comment character to distinguish timestamps from other his- tory lines. After saving the history, the history file is truncated to - contain no more than HHIISSTTFFIILLEESSIIZZEE lines. If HHIISSTTFFIILLEESSIIZZEE is not set, + contain no more than HHIISSTTFFIILLEESSIIZZEE lines. If HHIISSTTFFIILLEESSIIZZEE is not set, no truncation is performed. - The builtin command ffcc (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below) may be used + The builtin command ffcc (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below) may be used to list or edit and re-execute a portion of the history list. The hhiiss-- - ttoorryy builtin may be used to display or modify the history list and - manipulate the history file. When using command-line editing, search - commands are available in each editing mode that provide access to the + ttoorryy builtin may be used to display or modify the history list and + manipulate the history file. When using command-line editing, search + commands are available in each editing mode that provide access to the history list. - The shell allows control over which commands are saved on the history + The shell allows control over which commands are saved on the history list. The HHIISSTTCCOONNTTRROOLL and HHIISSTTIIGGNNOORREE variables may be set to cause the shell to save only a subset of the commands entered. The ccmmddhhiisstt shell - option, if enabled, causes the shell to attempt to save each line of a - multi-line command in the same history entry, adding semicolons where - necessary to preserve syntactic correctness. The lliitthhiisstt shell option - causes the shell to save the command with embedded newlines instead of + option, if enabled, causes the shell to attempt to save each line of a + multi-line command in the same history entry, adding semicolons where + necessary to preserve syntactic correctness. The lliitthhiisstt shell option + causes the shell to save the command with embedded newlines instead of semicolons. See the description of the sshhoopptt builtin below under SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS for information on setting and unsetting shell options. HHIISSTTOORRYY EEXXPPAANNSSIIOONN - The shell supports a history expansion feature that is similar to the - history expansion in ccsshh.. This section describes what syntax features - are available. This feature is enabled by default for interactive + The shell supports a history expansion feature that is similar to the + history expansion in ccsshh.. This section describes what syntax features + are available. This feature is enabled by default for interactive shells, and can be disabled using the ++HH option to the sseett builtin com- mand (see SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS below). Non-interactive shells do not perform history expansion by default. History expansions introduce words from the history list into the input - stream, making it easy to repeat commands, insert the arguments to a + stream, making it easy to repeat commands, insert the arguments to a previous command into the current input line, or fix errors in previous commands quickly. - History expansion is performed immediately after a complete line is - read, before the shell breaks it into words. It takes place in two - parts. The first is to determine which line from the history list to + History expansion is performed immediately after a complete line is + read, before the shell breaks it into words. It takes place in two + parts. The first is to determine which line from the history list to use during substitution. The second is to select portions of that line for inclusion into the current one. The line selected from the history - is the _e_v_e_n_t, and the portions of that line that are acted upon are - _w_o_r_d_s. Various _m_o_d_i_f_i_e_r_s are available to manipulate the selected + is the _e_v_e_n_t, and the portions of that line that are acted upon are + _w_o_r_d_s. Various _m_o_d_i_f_i_e_r_s are available to manipulate the selected words. The line is broken into words in the same fashion as when read- - ing input, so that several _m_e_t_a_c_h_a_r_a_c_t_e_r-separated words surrounded by - quotes are considered one word. History expansions are introduced by - the appearance of the history expansion character, which is !! by - default. Only backslash (\\) and single quotes can quote the history + ing input, so that several _m_e_t_a_c_h_a_r_a_c_t_e_r-separated words surrounded by + quotes are considered one word. History expansions are introduced by + the appearance of the history expansion character, which is !! by + default. Only backslash (\\) and single quotes can quote the history expansion character. - Several characters inhibit history expansion if found immediately fol- - lowing the history expansion character, even if it is unquoted: space, - tab, newline, carriage return, and ==. If the eexxttgglloobb shell option is + Several characters inhibit history expansion if found immediately fol- + lowing the history expansion character, even if it is unquoted: space, + tab, newline, carriage return, and ==. If the eexxttgglloobb shell option is enabled, (( will also inhibit expansion. - Several shell options settable with the sshhoopptt builtin may be used to - tailor the behavior of history expansion. If the hhiissttvveerriiffyy shell + Several shell options settable with the sshhoopptt builtin may be used to + tailor the behavior of history expansion. If the hhiissttvveerriiffyy shell option is enabled (see the description of the sshhoopptt builtin below), and - rreeaaddlliinnee is being used, history substitutions are not immediately - passed to the shell parser. Instead, the expanded line is reloaded + rreeaaddlliinnee is being used, history substitutions are not immediately + passed to the shell parser. Instead, the expanded line is reloaded into the rreeaaddlliinnee editing buffer for further modification. If rreeaaddlliinnee - is being used, and the hhiissttrreeeeddiitt shell option is enabled, a failed - history substitution will be reloaded into the rreeaaddlliinnee editing buffer - for correction. The --pp option to the hhiissttoorryy builtin command may be - used to see what a history expansion will do before using it. The --ss + is being used, and the hhiissttrreeeeddiitt shell option is enabled, a failed + history substitution will be reloaded into the rreeaaddlliinnee editing buffer + for correction. The --pp option to the hhiissttoorryy builtin command may be + used to see what a history expansion will do before using it. The --ss option to the hhiissttoorryy builtin may be used to add commands to the end of - the history list without actually executing them, so that they are + the history list without actually executing them, so that they are available for subsequent recall. - The shell allows control of the various characters used by the history + The shell allows control of the various characters used by the history expansion mechanism (see the description of hhiissttcchhaarrss above under SShheellll - VVaarriiaabblleess). The shell uses the history comment character to mark his- + VVaarriiaabblleess). The shell uses the history comment character to mark his- tory timestamps when writing the history file. EEvveenntt DDeessiiggnnaattoorrss - An event designator is a reference to a command line entry in the his- - tory list. Unless the reference is absolute, events are relative to + An event designator is a reference to a command line entry in the his- + tory list. Unless the reference is absolute, events are relative to the current position in the history list. - !! Start a history substitution, except when followed by a bbllaannkk, - newline, carriage return, = or ( (when the eexxttgglloobb shell option + !! Start a history substitution, except when followed by a bbllaannkk, + newline, carriage return, = or ( (when the eexxttgglloobb shell option is enabled using the sshhoopptt builtin). !!_n Refer to command line _n. !!--_n Refer to the current command minus _n. !!!! Refer to the previous command. This is a synonym for `!-1'. !!_s_t_r_i_n_g - Refer to the most recent command preceding the current position + Refer to the most recent command preceding the current position in the history list starting with _s_t_r_i_n_g. !!??_s_t_r_i_n_g[[??]] Refer to the most recent command preceding the current postition - in the history list containing _s_t_r_i_n_g. The trailing ?? may be + in the history list containing _s_t_r_i_n_g. The trailing ?? may be omitted if _s_t_r_i_n_g is followed immediately by a newline. ^^_s_t_r_i_n_g_1^^_s_t_r_i_n_g_2^^ - Quick substitution. Repeat the previous command, replacing - _s_t_r_i_n_g_1 with _s_t_r_i_n_g_2. Equivalent to ``!!:s/_s_t_r_i_n_g_1/_s_t_r_i_n_g_2/'' + Quick substitution. Repeat the previous command, replacing + _s_t_r_i_n_g_1 with _s_t_r_i_n_g_2. Equivalent to ``!!:s/_s_t_r_i_n_g_1/_s_t_r_i_n_g_2/'' (see MMooddiiffiieerrss below). !!## The entire command line typed so far. WWoorrdd DDeessiiggnnaattoorrss - Word designators are used to select desired words from the event. A :: - separates the event specification from the word designator. It may be - omitted if the word designator begins with a ^^, $$, **, --, or %%. Words - are numbered from the beginning of the line, with the first word being - denoted by 0 (zero). Words are inserted into the current line sepa- + Word designators are used to select desired words from the event. A :: + separates the event specification from the word designator. It may be + omitted if the word designator begins with a ^^, $$, **, --, or %%. Words + are numbered from the beginning of the line, with the first word being + denoted by 0 (zero). Words are inserted into the current line sepa- rated by single spaces. 00 ((zzeerroo)) @@ -3682,17 +3685,17 @@ HHIISSTTOORRYY EEXXPPAANNSSIIOONN $$ The last argument. %% The word matched by the most recent `?_s_t_r_i_n_g?' search. _x--_y A range of words; `-_y' abbreviates `0-_y'. - ** All of the words but the zeroth. This is a synonym for `_1_-_$'. - It is not an error to use ** if there is just one word in the + ** All of the words but the zeroth. This is a synonym for `_1_-_$'. + It is not an error to use ** if there is just one word in the event; the empty string is returned in that case. xx** Abbreviates _x_-_$. xx-- Abbreviates _x_-_$ like xx**, but omits the last word. - If a word designator is supplied without an event specification, the + If a word designator is supplied without an event specification, the previous command is used as the event. MMooddiiffiieerrss - After the optional word designator, there may appear a sequence of one + After the optional word designator, there may appear a sequence of one or more of the following modifiers, each preceded by a `:'. hh Remove a trailing filename component, leaving only the head. @@ -3701,74 +3704,74 @@ HHIISSTTOORRYY EEXXPPAANNSSIIOONN ee Remove all but the trailing suffix. pp Print the new command but do not execute it. qq Quote the substituted words, escaping further substitutions. - xx Quote the substituted words as with qq, but break into words at + xx Quote the substituted words as with qq, but break into words at bbllaannkkss and newlines. ss//_o_l_d//_n_e_w// - Substitute _n_e_w for the first occurrence of _o_l_d in the event - line. Any delimiter can be used in place of /. The final - delimiter is optional if it is the last character of the event - line. The delimiter may be quoted in _o_l_d and _n_e_w with a single - backslash. If & appears in _n_e_w, it is replaced by _o_l_d. A sin- - gle backslash will quote the &. If _o_l_d is null, it is set to - the last _o_l_d substituted, or, if no previous history substitu- + Substitute _n_e_w for the first occurrence of _o_l_d in the event + line. Any delimiter can be used in place of /. The final + delimiter is optional if it is the last character of the event + line. The delimiter may be quoted in _o_l_d and _n_e_w with a single + backslash. If & appears in _n_e_w, it is replaced by _o_l_d. A sin- + gle backslash will quote the &. If _o_l_d is null, it is set to + the last _o_l_d substituted, or, if no previous history substitu- tions took place, the last _s_t_r_i_n_g in a !!??_s_t_r_i_n_g[[??]] search. && Repeat the previous substitution. gg Cause changes to be applied over the entire event line. This is - used in conjunction with `::ss' (e.g., `::ggss//_o_l_d//_n_e_w//') or `::&&'. - If used with `::ss', any delimiter can be used in place of /, and - the final delimiter is optional if it is the last character of + used in conjunction with `::ss' (e.g., `::ggss//_o_l_d//_n_e_w//') or `::&&'. + If used with `::ss', any delimiter can be used in place of /, and + the final delimiter is optional if it is the last character of the event line. An aa may be used as a synonym for gg. - GG Apply the following `ss' modifier once to each word in the event + GG Apply the following `ss' modifier once to each word in the event line. SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS Unless otherwise noted, each builtin command documented in this section as accepting options preceded by -- accepts ---- to signify the end of the - options. The ::, ttrruuee, ffaallssee, and tteesstt builtins do not accept options + options. The ::, ttrruuee, ffaallssee, and tteesstt builtins do not accept options and do not treat ---- specially. The eexxiitt, llooggoouutt, bbrreeaakk, ccoonnttiinnuuee, lleett, - and sshhiifftt builtins accept and process arguments beginning with -- with- - out requiring ----. Other builtins that accept arguments but are not - specified as accepting options interpret arguments beginning with -- as + and sshhiifftt builtins accept and process arguments beginning with -- with- + out requiring ----. Other builtins that accept arguments but are not + specified as accepting options interpret arguments beginning with -- as invalid options and require ---- to prevent this interpretation. :: [_a_r_g_u_m_e_n_t_s] - No effect; the command does nothing beyond expanding _a_r_g_u_m_e_n_t_s - and performing any specified redirections. A zero exit code is + No effect; the command does nothing beyond expanding _a_r_g_u_m_e_n_t_s + and performing any specified redirections. A zero exit code is returned. .. _f_i_l_e_n_a_m_e [_a_r_g_u_m_e_n_t_s] ssoouurrccee _f_i_l_e_n_a_m_e [_a_r_g_u_m_e_n_t_s] - Read and execute commands from _f_i_l_e_n_a_m_e in the current shell - environment and return the exit status of the last command exe- - cuted from _f_i_l_e_n_a_m_e. If _f_i_l_e_n_a_m_e does not contain a slash, - filenames in PPAATTHH are used to find the directory containing + Read and execute commands from _f_i_l_e_n_a_m_e in the current shell + environment and return the exit status of the last command exe- + cuted from _f_i_l_e_n_a_m_e. If _f_i_l_e_n_a_m_e does not contain a slash, + filenames in PPAATTHH are used to find the directory containing _f_i_l_e_n_a_m_e. The file searched for in PPAATTHH need not be executable. - When bbaasshh is not in _p_o_s_i_x _m_o_d_e, the current directory is - searched if no file is found in PPAATTHH. If the ssoouurrcceeppaatthh option - to the sshhoopptt builtin command is turned off, the PPAATTHH is not - searched. If any _a_r_g_u_m_e_n_t_s are supplied, they become the posi- - tional parameters when _f_i_l_e_n_a_m_e is executed. Otherwise the - positional parameters are unchanged. The return status is the - status of the last command exited within the script (0 if no - commands are executed), and false if _f_i_l_e_n_a_m_e is not found or + When bbaasshh is not in _p_o_s_i_x _m_o_d_e, the current directory is + searched if no file is found in PPAATTHH. If the ssoouurrcceeppaatthh option + to the sshhoopptt builtin command is turned off, the PPAATTHH is not + searched. If any _a_r_g_u_m_e_n_t_s are supplied, they become the posi- + tional parameters when _f_i_l_e_n_a_m_e is executed. Otherwise the + positional parameters are unchanged. The return status is the + status of the last command exited within the script (0 if no + commands are executed), and false if _f_i_l_e_n_a_m_e is not found or cannot be read. aalliiaass [--pp] [_n_a_m_e[=_v_a_l_u_e] ...] AAlliiaass with no arguments or with the --pp option prints the list of - aliases in the form aalliiaass _n_a_m_e=_v_a_l_u_e on standard output. When - arguments are supplied, an alias is defined for each _n_a_m_e whose + aliases in the form aalliiaass _n_a_m_e=_v_a_l_u_e on standard output. When + arguments are supplied, an alias is defined for each _n_a_m_e whose _v_a_l_u_e is given. A trailing space in _v_a_l_u_e causes the next word to be checked for alias substitution when the alias is expanded. - For each _n_a_m_e in the argument list for which no _v_a_l_u_e is sup- - plied, the name and value of the alias is printed. AAlliiaass - returns true unless a _n_a_m_e is given for which no alias has been + For each _n_a_m_e in the argument list for which no _v_a_l_u_e is sup- + plied, the name and value of the alias is printed. AAlliiaass + returns true unless a _n_a_m_e is given for which no alias has been defined. bbgg [_j_o_b_s_p_e_c ...] - Resume each suspended job _j_o_b_s_p_e_c in the background, as if it + Resume each suspended job _j_o_b_s_p_e_c in the background, as if it had been started with &&. If _j_o_b_s_p_e_c is not present, the shell's - notion of the _c_u_r_r_e_n_t _j_o_b is used. bbgg _j_o_b_s_p_e_c returns 0 unless - run when job control is disabled or, when run with job control - enabled, any specified _j_o_b_s_p_e_c was not found or was started + notion of the _c_u_r_r_e_n_t _j_o_b is used. bbgg _j_o_b_s_p_e_c returns 0 unless + run when job control is disabled or, when run with job control + enabled, any specified _j_o_b_s_p_e_c was not found or was started without job control. bbiinndd [--mm _k_e_y_m_a_p] [--llppssvvPPSSVV] @@ -3777,28 +3780,28 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS bbiinndd [--mm _k_e_y_m_a_p] --xx _k_e_y_s_e_q:_s_h_e_l_l_-_c_o_m_m_a_n_d bbiinndd [--mm _k_e_y_m_a_p] _k_e_y_s_e_q:_f_u_n_c_t_i_o_n_-_n_a_m_e bbiinndd _r_e_a_d_l_i_n_e_-_c_o_m_m_a_n_d - Display current rreeaaddlliinnee key and function bindings, bind a key - sequence to a rreeaaddlliinnee function or macro, or set a rreeaaddlliinnee - variable. Each non-option argument is a command as it would - appear in _._i_n_p_u_t_r_c, but each binding or command must be passed - as a separate argument; e.g., '"\C-x\C-r": re-read-init-file'. + Display current rreeaaddlliinnee key and function bindings, bind a key + sequence to a rreeaaddlliinnee function or macro, or set a rreeaaddlliinnee + variable. Each non-option argument is a command as it would + appear in _._i_n_p_u_t_r_c, but each binding or command must be passed + as a separate argument; e.g., '"\C-x\C-r": re-read-init-file'. Options, if supplied, have the following meanings: --mm _k_e_y_m_a_p Use _k_e_y_m_a_p as the keymap to be affected by the subsequent bindings. Acceptable _k_e_y_m_a_p names are _e_m_a_c_s_, _e_m_a_c_s_-_s_t_a_n_- - _d_a_r_d_, _e_m_a_c_s_-_m_e_t_a_, _e_m_a_c_s_-_c_t_l_x_, _v_i_, _v_i_-_m_o_v_e_, _v_i_-_c_o_m_m_a_n_d, - and _v_i_-_i_n_s_e_r_t. _v_i is equivalent to _v_i_-_c_o_m_m_a_n_d; _e_m_a_c_s is + _d_a_r_d_, _e_m_a_c_s_-_m_e_t_a_, _e_m_a_c_s_-_c_t_l_x_, _v_i_, _v_i_-_m_o_v_e_, _v_i_-_c_o_m_m_a_n_d, + and _v_i_-_i_n_s_e_r_t. _v_i is equivalent to _v_i_-_c_o_m_m_a_n_d; _e_m_a_c_s is equivalent to _e_m_a_c_s_-_s_t_a_n_d_a_r_d. --ll List the names of all rreeaaddlliinnee functions. - --pp Display rreeaaddlliinnee function names and bindings in such a + --pp Display rreeaaddlliinnee function names and bindings in such a way that they can be re-read. --PP List current rreeaaddlliinnee function names and bindings. - --ss Display rreeaaddlliinnee key sequences bound to macros and the - strings they output in such a way that they can be re- + --ss Display rreeaaddlliinnee key sequences bound to macros and the + strings they output in such a way that they can be re- read. - --SS Display rreeaaddlliinnee key sequences bound to macros and the + --SS Display rreeaaddlliinnee key sequences bound to macros and the strings they output. - --vv Display rreeaaddlliinnee variable names and values in such a way + --vv Display rreeaaddlliinnee variable names and values in such a way that they can be re-read. --VV List current rreeaaddlliinnee variable names and values. --ff _f_i_l_e_n_a_m_e @@ -3810,157 +3813,157 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS --rr _k_e_y_s_e_q Remove any current binding for _k_e_y_s_e_q. --xx _k_e_y_s_e_q::_s_h_e_l_l_-_c_o_m_m_a_n_d - Cause _s_h_e_l_l_-_c_o_m_m_a_n_d to be executed whenever _k_e_y_s_e_q is - entered. When _s_h_e_l_l_-_c_o_m_m_a_n_d is executed, the shell sets - the RREEAADDLLIINNEE__LLIINNEE variable to the contents of the rreeaadd-- - lliinnee line buffer and the RREEAADDLLIINNEE__PPOOIINNTT variable to the + Cause _s_h_e_l_l_-_c_o_m_m_a_n_d to be executed whenever _k_e_y_s_e_q is + entered. When _s_h_e_l_l_-_c_o_m_m_a_n_d is executed, the shell sets + the RREEAADDLLIINNEE__LLIINNEE variable to the contents of the rreeaadd-- + lliinnee line buffer and the RREEAADDLLIINNEE__PPOOIINNTT variable to the current location of the insertion point. If the executed - command changes the value of RREEAADDLLIINNEE__LLIINNEE or RREEAADD-- - LLIINNEE__PPOOIINNTT, those new values will be reflected in the + command changes the value of RREEAADDLLIINNEE__LLIINNEE or RREEAADD-- + LLIINNEE__PPOOIINNTT, those new values will be reflected in the editing state. - The return value is 0 unless an unrecognized option is given or + The return value is 0 unless an unrecognized option is given or an error occurred. bbrreeaakk [_n] - Exit from within a ffoorr, wwhhiillee, uunnttiill, or sseelleecctt loop. If _n is - specified, break _n levels. _n must be >= 1. If _n is greater - than the number of enclosing loops, all enclosing loops are - exited. The return value is 0 unless _n is not greater than or + Exit from within a ffoorr, wwhhiillee, uunnttiill, or sseelleecctt loop. If _n is + specified, break _n levels. _n must be >= 1. If _n is greater + than the number of enclosing loops, all enclosing loops are + exited. The return value is 0 unless _n is not greater than or equal to 1. bbuuiillttiinn _s_h_e_l_l_-_b_u_i_l_t_i_n [_a_r_g_u_m_e_n_t_s] - Execute the specified shell builtin, passing it _a_r_g_u_m_e_n_t_s, and + Execute the specified shell builtin, passing it _a_r_g_u_m_e_n_t_s, and return its exit status. This is useful when defining a function - whose name is the same as a shell builtin, retaining the func- + whose name is the same as a shell builtin, retaining the func- tionality of the builtin within the function. The ccdd builtin is - commonly redefined this way. The return status is false if + commonly redefined this way. The return status is false if _s_h_e_l_l_-_b_u_i_l_t_i_n is not a shell builtin command. ccaalllleerr [_e_x_p_r] Returns the context of any active subroutine call (a shell func- tion or a script executed with the .. or ssoouurrccee builtins). With- out _e_x_p_r, ccaalllleerr displays the line number and source filename of - the current subroutine call. If a non-negative integer is sup- + the current subroutine call. If a non-negative integer is sup- plied as _e_x_p_r, ccaalllleerr displays the line number, subroutine name, - and source file corresponding to that position in the current - execution call stack. This extra information may be used, for - example, to print a stack trace. The current frame is frame 0. - The return value is 0 unless the shell is not executing a sub- - routine call or _e_x_p_r does not correspond to a valid position in + and source file corresponding to that position in the current + execution call stack. This extra information may be used, for + example, to print a stack trace. The current frame is frame 0. + The return value is 0 unless the shell is not executing a sub- + routine call or _e_x_p_r does not correspond to a valid position in the call stack. ccdd [--LL|[--PP [--ee]]] [_d_i_r] - Change the current directory to _d_i_r. The variable HHOOMMEE is the - default _d_i_r. The variable CCDDPPAATTHH defines the search path for - the directory containing _d_i_r. Alternative directory names in - CCDDPPAATTHH are separated by a colon (:). A null directory name in - CCDDPPAATTHH is the same as the current directory, i.e., ``..''. If - _d_i_r begins with a slash (/), then CCDDPPAATTHH is not used. The --PP - option says to use the physical directory structure instead of - following symbolic links (see also the --PP option to the sseett + Change the current directory to _d_i_r. The variable HHOOMMEE is the + default _d_i_r. The variable CCDDPPAATTHH defines the search path for + the directory containing _d_i_r. Alternative directory names in + CCDDPPAATTHH are separated by a colon (:). A null directory name in + CCDDPPAATTHH is the same as the current directory, i.e., ``..''. If + _d_i_r begins with a slash (/), then CCDDPPAATTHH is not used. The --PP + option says to use the physical directory structure instead of + following symbolic links (see also the --PP option to the sseett builtin command); the --LL option forces symbolic links to be fol- - lowed. If the --ee option is supplied with --PP, and the current + lowed. If the --ee option is supplied with --PP, and the current working directory cannot be successfully determined after a suc- cessful directory change, ccdd will return an unsuccessful status. - An argument of -- is converted to $$OOLLDDPPWWDD before the directory - change is attempted. If a non-empty directory name from CCDDPPAATTHH + An argument of -- is converted to $$OOLLDDPPWWDD before the directory + change is attempted. If a non-empty directory name from CCDDPPAATTHH is used, or if -- is the first argument, and the directory change - is successful, the absolute pathname of the new working direc- - tory is written to the standard output. The return value is + is successful, the absolute pathname of the new working direc- + tory is written to the standard output. The return value is true if the directory was successfully changed; false otherwise. ccoommmmaanndd [--ppVVvv] _c_o_m_m_a_n_d [_a_r_g ...] - Run _c_o_m_m_a_n_d with _a_r_g_s suppressing the normal shell function - lookup. Only builtin commands or commands found in the PPAATTHH are - executed. If the --pp option is given, the search for _c_o_m_m_a_n_d is - performed using a default value for PPAATTHH that is guaranteed to - find all of the standard utilities. If either the --VV or --vv + Run _c_o_m_m_a_n_d with _a_r_g_s suppressing the normal shell function + lookup. Only builtin commands or commands found in the PPAATTHH are + executed. If the --pp option is given, the search for _c_o_m_m_a_n_d is + performed using a default value for PPAATTHH that is guaranteed to + find all of the standard utilities. If either the --VV or --vv option is supplied, a description of _c_o_m_m_a_n_d is printed. The --vv - option causes a single word indicating the command or filename + option causes a single word indicating the command or filename used to invoke _c_o_m_m_a_n_d to be displayed; the --VV option produces a - more verbose description. If the --VV or --vv option is supplied, - the exit status is 0 if _c_o_m_m_a_n_d was found, and 1 if not. If + more verbose description. If the --VV or --vv option is supplied, + the exit status is 0 if _c_o_m_m_a_n_d was found, and 1 if not. If neither option is supplied and an error occurred or _c_o_m_m_a_n_d can- - not be found, the exit status is 127. Otherwise, the exit sta- + not be found, the exit status is 127. Otherwise, the exit sta- tus of the ccoommmmaanndd builtin is the exit status of _c_o_m_m_a_n_d. ccoommppggeenn [_o_p_t_i_o_n] [_w_o_r_d] - Generate possible completion matches for _w_o_r_d according to the - _o_p_t_i_o_ns, which may be any option accepted by the ccoommpplleettee - builtin with the exception of --pp and --rr, and write the matches - to the standard output. When using the --FF or --CC options, the - various shell variables set by the programmable completion + Generate possible completion matches for _w_o_r_d according to the + _o_p_t_i_o_ns, which may be any option accepted by the ccoommpplleettee + builtin with the exception of --pp and --rr, and write the matches + to the standard output. When using the --FF or --CC options, the + various shell variables set by the programmable completion facilities, while available, will not have useful values. - The matches will be generated in the same way as if the pro- - grammable completion code had generated them directly from a + The matches will be generated in the same way as if the pro- + grammable completion code had generated them directly from a completion specification with the same flags. If _w_o_r_d is speci- fied, only those completions matching _w_o_r_d will be displayed. - The return value is true unless an invalid option is supplied, + The return value is true unless an invalid option is supplied, or no matches were generated. - ccoommpplleettee [--aabbccddeeffggjjkkssuuvv] [--oo _c_o_m_p_-_o_p_t_i_o_n] [--DDEE] [--AA _a_c_t_i_o_n] [--GG _g_l_o_b_- + ccoommpplleettee [--aabbccddeeffggjjkkssuuvv] [--oo _c_o_m_p_-_o_p_t_i_o_n] [--DDEE] [--AA _a_c_t_i_o_n] [--GG _g_l_o_b_- _p_a_t] [--WW _w_o_r_d_l_i_s_t] [--FF _f_u_n_c_t_i_o_n] [--CC _c_o_m_m_a_n_d] [--XX _f_i_l_t_e_r_p_a_t] [--PP _p_r_e_f_i_x] [--SS _s_u_f_f_i_x] _n_a_m_e [_n_a_m_e _._._.] ccoommpplleettee --pprr [--DDEE] [_n_a_m_e ...] - Specify how arguments to each _n_a_m_e should be completed. If the - --pp option is supplied, or if no options are supplied, existing - completion specifications are printed in a way that allows them + Specify how arguments to each _n_a_m_e should be completed. If the + --pp option is supplied, or if no options are supplied, existing + completion specifications are printed in a way that allows them to be reused as input. The --rr option removes a completion spec- - ification for each _n_a_m_e, or, if no _n_a_m_es are supplied, all com- + ification for each _n_a_m_e, or, if no _n_a_m_es are supplied, all com- pletion specifications. The --DD option indicates that the - remaining options and actions should apply to the ``default'' - command completion; that is, completion attempted on a command - for which no completion has previously been defined. The --EE - option indicates that the remaining options and actions should - apply to ``empty'' command completion; that is, completion + remaining options and actions should apply to the ``default'' + command completion; that is, completion attempted on a command + for which no completion has previously been defined. The --EE + option indicates that the remaining options and actions should + apply to ``empty'' command completion; that is, completion attempted on a blank line. - The process of applying these completion specifications when - word completion is attempted is described above under PPrroo-- + The process of applying these completion specifications when + word completion is attempted is described above under PPrroo-- ggrraammmmaabbllee CCoommpplleettiioonn. - Other options, if specified, have the following meanings. The - arguments to the --GG, --WW, and --XX options (and, if necessary, the - --PP and --SS options) should be quoted to protect them from expan- + Other options, if specified, have the following meanings. The + arguments to the --GG, --WW, and --XX options (and, if necessary, the + --PP and --SS options) should be quoted to protect them from expan- sion before the ccoommpplleettee builtin is invoked. --oo _c_o_m_p_-_o_p_t_i_o_n - The _c_o_m_p_-_o_p_t_i_o_n controls several aspects of the comp- - spec's behavior beyond the simple generation of comple- + The _c_o_m_p_-_o_p_t_i_o_n controls several aspects of the comp- + spec's behavior beyond the simple generation of comple- tions. _c_o_m_p_-_o_p_t_i_o_n may be one of: bbaasshhddeeffaauulltt Perform the rest of the default bbaasshh completions if the compspec generates no matches. - ddeeffaauulltt Use readline's default filename completion if + ddeeffaauulltt Use readline's default filename completion if the compspec generates no matches. ddiirrnnaammeess - Perform directory name completion if the comp- + Perform directory name completion if the comp- spec generates no matches. ffiilleennaammeess - Tell readline that the compspec generates file- - names, so it can perform any filename-specific - processing (like adding a slash to directory - names, quoting special characters, or suppress- - ing trailing spaces). Intended to be used with + Tell readline that the compspec generates file- + names, so it can perform any filename-specific + processing (like adding a slash to directory + names, quoting special characters, or suppress- + ing trailing spaces). Intended to be used with shell functions. - nnoossppaaccee Tell readline not to append a space (the - default) to words completed at the end of the + nnoossppaaccee Tell readline not to append a space (the + default) to words completed at the end of the line. pplluussddiirrss - After any matches defined by the compspec are - generated, directory name completion is - attempted and any matches are added to the + After any matches defined by the compspec are + generated, directory name completion is + attempted and any matches are added to the results of the other actions. --AA _a_c_t_i_o_n - The _a_c_t_i_o_n may be one of the following to generate a + The _a_c_t_i_o_n may be one of the following to generate a list of possible completions: aalliiaass Alias names. May also be specified as --aa. aarrrraayyvvaarr Array variable names. bbiinnddiinngg RReeaaddlliinnee key binding names. - bbuuiillttiinn Names of shell builtin commands. May also be + bbuuiillttiinn Names of shell builtin commands. May also be specified as --bb. ccoommmmaanndd Command names. May also be specified as --cc. ddiirreeccttoorryy @@ -3968,7 +3971,7 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS ddiissaabblleedd Names of disabled shell builtins. eennaabblleedd Names of enabled shell builtins. - eexxppoorrtt Names of exported shell variables. May also be + eexxppoorrtt Names of exported shell variables. May also be specified as --ee. ffiillee File names. May also be specified as --ff. ffuunnccttiioonn @@ -3977,17 +3980,17 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS hheellppttooppiicc Help topics as accepted by the hheellpp builtin. hhoossttnnaammee - Hostnames, as taken from the file specified by + Hostnames, as taken from the file specified by the HHOOSSTTFFIILLEE shell variable. - jjoobb Job names, if job control is active. May also + jjoobb Job names, if job control is active. May also be specified as --jj. - kkeeyywwoorrdd Shell reserved words. May also be specified as + kkeeyywwoorrdd Shell reserved words. May also be specified as --kk. rruunnnniinngg Names of running jobs, if job control is active. sseerrvviiccee Service names. May also be specified as --ss. - sseettoopptt Valid arguments for the --oo option to the sseett + sseettoopptt Valid arguments for the --oo option to the sseett builtin. - sshhoopptt Shell option names as accepted by the sshhoopptt + sshhoopptt Shell option names as accepted by the sshhoopptt builtin. ssiiggnnaall Signal names. ssttooppppeedd Names of stopped jobs, if job control is active. @@ -3996,175 +3999,175 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS Names of all shell variables. May also be spec- ified as --vv. --CC _c_o_m_m_a_n_d - _c_o_m_m_a_n_d is executed in a subshell environment, and its + _c_o_m_m_a_n_d is executed in a subshell environment, and its output is used as the possible completions. --FF _f_u_n_c_t_i_o_n - The shell function _f_u_n_c_t_i_o_n is executed in the current - shell environment. When it finishes, the possible com- - pletions are retrieved from the value of the CCOOMMPPRREEPPLLYY + The shell function _f_u_n_c_t_i_o_n is executed in the current + shell environment. When it finishes, the possible com- + pletions are retrieved from the value of the CCOOMMPPRREEPPLLYY array variable. --GG _g_l_o_b_p_a_t - The pathname expansion pattern _g_l_o_b_p_a_t is expanded to + The pathname expansion pattern _g_l_o_b_p_a_t is expanded to generate the possible completions. --PP _p_r_e_f_i_x - _p_r_e_f_i_x is added at the beginning of each possible com- + _p_r_e_f_i_x is added at the beginning of each possible com- pletion after all other options have been applied. --SS _s_u_f_f_i_x _s_u_f_f_i_x is appended to each possible completion after all other options have been applied. --WW _w_o_r_d_l_i_s_t - The _w_o_r_d_l_i_s_t is split using the characters in the IIFFSS - special variable as delimiters, and each resultant word - is expanded. The possible completions are the members - of the resultant list which match the word being com- + The _w_o_r_d_l_i_s_t is split using the characters in the IIFFSS + special variable as delimiters, and each resultant word + is expanded. The possible completions are the members + of the resultant list which match the word being com- pleted. --XX _f_i_l_t_e_r_p_a_t - _f_i_l_t_e_r_p_a_t is a pattern as used for pathname expansion. + _f_i_l_t_e_r_p_a_t is a pattern as used for pathname expansion. It is applied to the list of possible completions gener- - ated by the preceding options and arguments, and each - completion matching _f_i_l_t_e_r_p_a_t is removed from the list. - A leading !! in _f_i_l_t_e_r_p_a_t negates the pattern; in this - case, any completion not matching _f_i_l_t_e_r_p_a_t is removed. - - The return value is true unless an invalid option is supplied, - an option other than --pp or --rr is supplied without a _n_a_m_e argu- - ment, an attempt is made to remove a completion specification + ated by the preceding options and arguments, and each + completion matching _f_i_l_t_e_r_p_a_t is removed from the list. + A leading !! in _f_i_l_t_e_r_p_a_t negates the pattern; in this + case, any completion not matching _f_i_l_t_e_r_p_a_t is removed. + + The return value is true unless an invalid option is supplied, + an option other than --pp or --rr is supplied without a _n_a_m_e argu- + ment, an attempt is made to remove a completion specification for a _n_a_m_e for which no specification exists, or an error occurs adding a completion specification. ccoommppoopptt [--oo _o_p_t_i_o_n] [--DDEE] [++oo _o_p_t_i_o_n] [_n_a_m_e] Modify completion options for each _n_a_m_e according to the - _o_p_t_i_o_ns, or for the currently-executing completion if no _n_a_m_es - are supplied. If no _o_p_t_i_o_ns are given, display the completion - options for each _n_a_m_e or the current completion. The possible - values of _o_p_t_i_o_n are those valid for the ccoommpplleettee builtin - described above. The --DD option indicates that the remaining + _o_p_t_i_o_ns, or for the currently-executing completion if no _n_a_m_es + are supplied. If no _o_p_t_i_o_ns are given, display the completion + options for each _n_a_m_e or the current completion. The possible + values of _o_p_t_i_o_n are those valid for the ccoommpplleettee builtin + described above. The --DD option indicates that the remaining options should apply to the ``default'' command completion; that - is, completion attempted on a command for which no completion - has previously been defined. The --EE option indicates that the - remaining options should apply to ``empty'' command completion; + is, completion attempted on a command for which no completion + has previously been defined. The --EE option indicates that the + remaining options should apply to ``empty'' command completion; that is, completion attempted on a blank line. - The return value is true unless an invalid option is supplied, + The return value is true unless an invalid option is supplied, an attempt is made to modify the options for a _n_a_m_e for which no completion specification exists, or an output error occurs. ccoonnttiinnuuee [_n] Resume the next iteration of the enclosing ffoorr, wwhhiillee, uunnttiill, or - sseelleecctt loop. If _n is specified, resume at the _nth enclosing - loop. _n must be >= 1. If _n is greater than the number of - enclosing loops, the last enclosing loop (the ``top-level'' + sseelleecctt loop. If _n is specified, resume at the _nth enclosing + loop. _n must be >= 1. If _n is greater than the number of + enclosing loops, the last enclosing loop (the ``top-level'' loop) is resumed. The return value is 0 unless _n is not greater than or equal to 1. ddeeccllaarree [--aaAAffFFggiillrrttuuxx] [--pp] [_n_a_m_e[=_v_a_l_u_e] ...] ttyyppeesseett [--aaAAffFFggiillrrttuuxx] [--pp] [_n_a_m_e[=_v_a_l_u_e] ...] - Declare variables and/or give them attributes. If no _n_a_m_es are - given then display the values of variables. The --pp option will + Declare variables and/or give them attributes. If no _n_a_m_es are + given then display the values of variables. The --pp option will display the attributes and values of each _n_a_m_e. When --pp is used with _n_a_m_e arguments, additional options are ignored. When --pp is - supplied without _n_a_m_e arguments, it will display the attributes - and values of all variables having the attributes specified by - the additional options. If no other options are supplied with - --pp, ddeeccllaarree will display the attributes and values of all shell - variables. The --ff option will restrict the display to shell + supplied without _n_a_m_e arguments, it will display the attributes + and values of all variables having the attributes specified by + the additional options. If no other options are supplied with + --pp, ddeeccllaarree will display the attributes and values of all shell + variables. The --ff option will restrict the display to shell functions. The --FF option inhibits the display of function defi- - nitions; only the function name and attributes are printed. If - the eexxttddeebbuugg shell option is enabled using sshhoopptt, the source + nitions; only the function name and attributes are printed. If + the eexxttddeebbuugg shell option is enabled using sshhoopptt, the source file name and line number where the function is defined are dis- played as well. The --FF option implies --ff. The --gg option forces - variables to be created or modified at the global scope, even - when ddeeccllaarree is executed in a shell function. It is ignored in - all other cases. The following options can be used to restrict - output to variables with the specified attribute or to give + variables to be created or modified at the global scope, even + when ddeeccllaarree is executed in a shell function. It is ignored in + all other cases. The following options can be used to restrict + output to variables with the specified attribute or to give variables attributes: - --aa Each _n_a_m_e is an indexed array variable (see AArrrraayyss + --aa Each _n_a_m_e is an indexed array variable (see AArrrraayyss above). - --AA Each _n_a_m_e is an associative array variable (see AArrrraayyss + --AA Each _n_a_m_e is an associative array variable (see AArrrraayyss above). --ff Use function names only. --ii The variable is treated as an integer; arithmetic evalua- - tion (see AARRIITTHHMMEETTIICC EEVVAALLUUAATTIIOONN above) is performed when + tion (see AARRIITTHHMMEETTIICC EEVVAALLUUAATTIIOONN above) is performed when the variable is assigned a value. - --ll When the variable is assigned a value, all upper-case - characters are converted to lower-case. The upper-case + --ll When the variable is assigned a value, all upper-case + characters are converted to lower-case. The upper-case attribute is disabled. --rr Make _n_a_m_es readonly. These names cannot then be assigned values by subsequent assignment statements or unset. - --tt Give each _n_a_m_e the _t_r_a_c_e attribute. Traced functions - inherit the DDEEBBUUGG and RREETTUURRNN traps from the calling - shell. The trace attribute has no special meaning for + --tt Give each _n_a_m_e the _t_r_a_c_e attribute. Traced functions + inherit the DDEEBBUUGG and RREETTUURRNN traps from the calling + shell. The trace attribute has no special meaning for variables. - --uu When the variable is assigned a value, all lower-case - characters are converted to upper-case. The lower-case + --uu When the variable is assigned a value, all lower-case + characters are converted to upper-case. The lower-case attribute is disabled. - --xx Mark _n_a_m_es for export to subsequent commands via the + --xx Mark _n_a_m_es for export to subsequent commands via the environment. - Using `+' instead of `-' turns off the attribute instead, with + Using `+' instead of `-' turns off the attribute instead, with the exceptions that ++aa may not be used to destroy an array vari- - able and ++rr will not remove the readonly attribute. When used + able and ++rr will not remove the readonly attribute. When used in a function, ddeeccllaarree and ttyyppeesseett make each _n_a_m_e local, as with the llooccaall command, unless the --gg option is supplied. If a vari- - able name is followed by =_v_a_l_u_e, the value of the variable is + able name is followed by =_v_a_l_u_e, the value of the variable is set to _v_a_l_u_e. The return value is 0 unless an invalid option is - encountered, an attempt is made to define a function using ``-f - foo=bar'', an attempt is made to assign a value to a readonly + encountered, an attempt is made to define a function using ``-f + foo=bar'', an attempt is made to assign a value to a readonly variable, an attempt is made to assign a value to an array vari- - able without using the compound assignment syntax (see AArrrraayyss - above), one of the _n_a_m_e_s is not a valid shell variable name, an + able without using the compound assignment syntax (see AArrrraayyss + above), one of the _n_a_m_e_s is not a valid shell variable name, an attempt is made to turn off readonly status for a readonly vari- - able, an attempt is made to turn off array status for an array - variable, or an attempt is made to display a non-existent func- + able, an attempt is made to turn off array status for an array + variable, or an attempt is made to display a non-existent func- tion with --ff. ddiirrss [[--ccllppvv]] [[++_n]] [[--_n]] - Without options, displays the list of currently remembered - directories. The default display is on a single line with - directory names separated by spaces. Directories are added to - the list with the ppuusshhdd command; the ppooppdd command removes + Without options, displays the list of currently remembered + directories. The default display is on a single line with + directory names separated by spaces. Directories are added to + the list with the ppuusshhdd command; the ppooppdd command removes entries from the list. --cc Clears the directory stack by deleting all of the entries. - --ll Produces a listing using full pathnames; the default + --ll Produces a listing using full pathnames; the default listing format uses a tilde to denote the home directory. --pp Print the directory stack with one entry per line. - --vv Print the directory stack with one entry per line, pre- + --vv Print the directory stack with one entry per line, pre- fixing each entry with its index in the stack. ++_n Displays the _nth entry counting from the left of the list shown by ddiirrss when invoked without options, starting with zero. - --_n Displays the _nth entry counting from the right of the + --_n Displays the _nth entry counting from the right of the list shown by ddiirrss when invoked without options, starting with zero. - The return value is 0 unless an invalid option is supplied or _n + The return value is 0 unless an invalid option is supplied or _n indexes beyond the end of the directory stack. ddiissoowwnn [--aarr] [--hh] [_j_o_b_s_p_e_c ...] - Without options, remove each _j_o_b_s_p_e_c from the table of active - jobs. If _j_o_b_s_p_e_c is not present, and neither --aa nor --rr is sup- + Without options, remove each _j_o_b_s_p_e_c from the table of active + jobs. If _j_o_b_s_p_e_c is not present, and neither --aa nor --rr is sup- plied, the shell's notion of the _c_u_r_r_e_n_t _j_o_b is used. If the --hh option is given, each _j_o_b_s_p_e_c is not removed from the table, but - is marked so that SSIIGGHHUUPP is not sent to the job if the shell + is marked so that SSIIGGHHUUPP is not sent to the job if the shell receives a SSIIGGHHUUPP. If no _j_o_b_s_p_e_c is present, and neither the --aa - nor the --rr option is supplied, the _c_u_r_r_e_n_t _j_o_b is used. If no - _j_o_b_s_p_e_c is supplied, the --aa option means to remove or mark all - jobs; the --rr option without a _j_o_b_s_p_e_c argument restricts opera- - tion to running jobs. The return value is 0 unless a _j_o_b_s_p_e_c + nor the --rr option is supplied, the _c_u_r_r_e_n_t _j_o_b is used. If no + _j_o_b_s_p_e_c is supplied, the --aa option means to remove or mark all + jobs; the --rr option without a _j_o_b_s_p_e_c argument restricts opera- + tion to running jobs. The return value is 0 unless a _j_o_b_s_p_e_c does not specify a valid job. eecchhoo [--nneeEE] [_a_r_g ...] - Output the _a_r_gs, separated by spaces, followed by a newline. - The return status is 0 unless a write error occurs. If --nn is + Output the _a_r_gs, separated by spaces, followed by a newline. + The return status is 0 unless a write error occurs. If --nn is specified, the trailing newline is suppressed. If the --ee option - is given, interpretation of the following backslash-escaped - characters is enabled. The --EE option disables the interpreta- - tion of these escape characters, even on systems where they are - interpreted by default. The xxppgg__eecchhoo shell option may be used - to dynamically determine whether or not eecchhoo expands these - escape characters by default. eecchhoo does not interpret ---- to - mean the end of options. eecchhoo interprets the following escape + is given, interpretation of the following backslash-escaped + characters is enabled. The --EE option disables the interpreta- + tion of these escape characters, even on systems where they are + interpreted by default. The xxppgg__eecchhoo shell option may be used + to dynamically determine whether or not eecchhoo expands these + escape characters by default. eecchhoo does not interpret ---- to + mean the end of options. eecchhoo interprets the following escape sequences: \\aa alert (bell) \\bb backspace @@ -4177,189 +4180,189 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS \\tt horizontal tab \\vv vertical tab \\\\ backslash - \\00_n_n_n the eight-bit character whose value is the octal value + \\00_n_n_n the eight-bit character whose value is the octal value _n_n_n (zero to three octal digits) - \\xx_H_H the eight-bit character whose value is the hexadecimal + \\xx_H_H the eight-bit character whose value is the hexadecimal value _H_H (one or two hex digits) - \\uu_H_H_H_H the Unicode (ISO/IEC 10646) character whose value is the + \\uu_H_H_H_H the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value _H_H_H_H (one to four hex digits) \\UU_H_H_H_H_H_H_H_H - the Unicode (ISO/IEC 10646) character whose value is the + the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value _H_H_H_H_H_H_H_H (one to eight hex digits) eennaabbllee [--aa] [--ddnnppss] [--ff _f_i_l_e_n_a_m_e] [_n_a_m_e ...] - Enable and disable builtin shell commands. Disabling a builtin + Enable and disable builtin shell commands. Disabling a builtin allows a disk command which has the same name as a shell builtin - to be executed without specifying a full pathname, even though - the shell normally searches for builtins before disk commands. - If --nn is used, each _n_a_m_e is disabled; otherwise, _n_a_m_e_s are + to be executed without specifying a full pathname, even though + the shell normally searches for builtins before disk commands. + If --nn is used, each _n_a_m_e is disabled; otherwise, _n_a_m_e_s are enabled. For example, to use the tteesstt binary found via the PPAATTHH - instead of the shell builtin version, run ``enable -n test''. - The --ff option means to load the new builtin command _n_a_m_e from + instead of the shell builtin version, run ``enable -n test''. + The --ff option means to load the new builtin command _n_a_m_e from shared object _f_i_l_e_n_a_m_e, on systems that support dynamic loading. - The --dd option will delete a builtin previously loaded with --ff. + The --dd option will delete a builtin previously loaded with --ff. If no _n_a_m_e arguments are given, or if the --pp option is supplied, a list of shell builtins is printed. With no other option argu- - ments, the list consists of all enabled shell builtins. If --nn - is supplied, only disabled builtins are printed. If --aa is sup- - plied, the list printed includes all builtins, with an indica- - tion of whether or not each is enabled. If --ss is supplied, the - output is restricted to the POSIX _s_p_e_c_i_a_l builtins. The return - value is 0 unless a _n_a_m_e is not a shell builtin or there is an + ments, the list consists of all enabled shell builtins. If --nn + is supplied, only disabled builtins are printed. If --aa is sup- + plied, the list printed includes all builtins, with an indica- + tion of whether or not each is enabled. If --ss is supplied, the + output is restricted to the POSIX _s_p_e_c_i_a_l builtins. The return + value is 0 unless a _n_a_m_e is not a shell builtin or there is an error loading a new builtin from a shared object. eevvaall [_a_r_g ...] - The _a_r_gs are read and concatenated together into a single com- - mand. This command is then read and executed by the shell, and - its exit status is returned as the value of eevvaall. If there are + The _a_r_gs are read and concatenated together into a single com- + mand. This command is then read and executed by the shell, and + its exit status is returned as the value of eevvaall. If there are no _a_r_g_s, or only null arguments, eevvaall returns 0. eexxeecc [--ccll] [--aa _n_a_m_e] [_c_o_m_m_a_n_d [_a_r_g_u_m_e_n_t_s]] - If _c_o_m_m_a_n_d is specified, it replaces the shell. No new process - is created. The _a_r_g_u_m_e_n_t_s become the arguments to _c_o_m_m_a_n_d. If + If _c_o_m_m_a_n_d is specified, it replaces the shell. No new process + is created. The _a_r_g_u_m_e_n_t_s become the arguments to _c_o_m_m_a_n_d. If the --ll option is supplied, the shell places a dash at the begin- - ning of the zeroth argument passed to _c_o_m_m_a_n_d. This is what + ning of the zeroth argument passed to _c_o_m_m_a_n_d. This is what _l_o_g_i_n(1) does. The --cc option causes _c_o_m_m_a_n_d to be executed with - an empty environment. If --aa is supplied, the shell passes _n_a_m_e + an empty environment. If --aa is supplied, the shell passes _n_a_m_e as the zeroth argument to the executed command. If _c_o_m_m_a_n_d can- - not be executed for some reason, a non-interactive shell exits, - unless the eexxeeccffaaiill shell option is enabled. In that case, it - returns failure. An interactive shell returns failure if the + not be executed for some reason, a non-interactive shell exits, + unless the eexxeeccffaaiill shell option is enabled. In that case, it + returns failure. An interactive shell returns failure if the file cannot be executed. If _c_o_m_m_a_n_d is not specified, any redi- rections take effect in the current shell, and the return status - is 0. If there is a redirection error, the return status is 1. + is 0. If there is a redirection error, the return status is 1. eexxiitt [_n] - Cause the shell to exit with a status of _n. If _n is omitted, + Cause the shell to exit with a status of _n. If _n is omitted, the exit status is that of the last command executed. A trap on EEXXIITT is executed before the shell terminates. eexxppoorrtt [--ffnn] [_n_a_m_e[=_w_o_r_d]] ... eexxppoorrtt --pp - The supplied _n_a_m_e_s are marked for automatic export to the envi- - ronment of subsequently executed commands. If the --ff option is - given, the _n_a_m_e_s refer to functions. If no _n_a_m_e_s are given, or - if the --pp option is supplied, a list of names of all exported - variables is printed. The --nn option causes the export property + The supplied _n_a_m_e_s are marked for automatic export to the envi- + ronment of subsequently executed commands. If the --ff option is + given, the _n_a_m_e_s refer to functions. If no _n_a_m_e_s are given, or + if the --pp option is supplied, a list of names of all exported + variables is printed. The --nn option causes the export property to be removed from each _n_a_m_e. If a variable name is followed by =_w_o_r_d, the value of the variable is set to _w_o_r_d. eexxppoorrtt returns an exit status of 0 unless an invalid option is encountered, one - of the _n_a_m_e_s is not a valid shell variable name, or --ff is sup- + of the _n_a_m_e_s is not a valid shell variable name, or --ff is sup- plied with a _n_a_m_e that is not a function. ffcc [--ee _e_n_a_m_e] [--llnnrr] [_f_i_r_s_t] [_l_a_s_t] ffcc --ss [_p_a_t=_r_e_p] [_c_m_d] - The first form selects a range of commands from _f_i_r_s_t to _l_a_s_t - from the history list and displays or edits and re-executes - them. _F_i_r_s_t and _l_a_s_t may be specified as a string (to locate - the last command beginning with that string) or as a number (an - index into the history list, where a negative number is used as - an offset from the current command number). If _l_a_s_t is not - specified it is set to the current command for listing (so that - ``fc -l -10'' prints the last 10 commands) and to _f_i_r_s_t other- - wise. If _f_i_r_s_t is not specified it is set to the previous com- + The first form selects a range of commands from _f_i_r_s_t to _l_a_s_t + from the history list and displays or edits and re-executes + them. _F_i_r_s_t and _l_a_s_t may be specified as a string (to locate + the last command beginning with that string) or as a number (an + index into the history list, where a negative number is used as + an offset from the current command number). If _l_a_s_t is not + specified it is set to the current command for listing (so that + ``fc -l -10'' prints the last 10 commands) and to _f_i_r_s_t other- + wise. If _f_i_r_s_t is not specified it is set to the previous com- mand for editing and -16 for listing. - The --nn option suppresses the command numbers when listing. The - --rr option reverses the order of the commands. If the --ll option - is given, the commands are listed on standard output. Other- - wise, the editor given by _e_n_a_m_e is invoked on a file containing - those commands. If _e_n_a_m_e is not given, the value of the FFCCEEDDIITT - variable is used, and the value of EEDDIITTOORR if FFCCEEDDIITT is not set. - If neither variable is set, _v_i is used. When editing is com- + The --nn option suppresses the command numbers when listing. The + --rr option reverses the order of the commands. If the --ll option + is given, the commands are listed on standard output. Other- + wise, the editor given by _e_n_a_m_e is invoked on a file containing + those commands. If _e_n_a_m_e is not given, the value of the FFCCEEDDIITT + variable is used, and the value of EEDDIITTOORR if FFCCEEDDIITT is not set. + If neither variable is set, _v_i is used. When editing is com- plete, the edited commands are echoed and executed. - In the second form, _c_o_m_m_a_n_d is re-executed after each instance - of _p_a_t is replaced by _r_e_p. _C_o_m_m_a_n_d is intepreted the same as - _f_i_r_s_t above. A useful alias to use with this is ``r="fc -s"'', - so that typing ``r cc'' runs the last command beginning with + In the second form, _c_o_m_m_a_n_d is re-executed after each instance + of _p_a_t is replaced by _r_e_p. _C_o_m_m_a_n_d is intepreted the same as + _f_i_r_s_t above. A useful alias to use with this is ``r="fc -s"'', + so that typing ``r cc'' runs the last command beginning with ``cc'' and typing ``r'' re-executes the last command. - If the first form is used, the return value is 0 unless an - invalid option is encountered or _f_i_r_s_t or _l_a_s_t specify history - lines out of range. If the --ee option is supplied, the return + If the first form is used, the return value is 0 unless an + invalid option is encountered or _f_i_r_s_t or _l_a_s_t specify history + lines out of range. If the --ee option is supplied, the return value is the value of the last command executed or failure if an error occurs with the temporary file of commands. If the second - form is used, the return status is that of the command re-exe- - cuted, unless _c_m_d does not specify a valid history line, in + form is used, the return status is that of the command re-exe- + cuted, unless _c_m_d does not specify a valid history line, in which case ffcc returns failure. ffgg [_j_o_b_s_p_e_c] - Resume _j_o_b_s_p_e_c in the foreground, and make it the current job. + Resume _j_o_b_s_p_e_c in the foreground, and make it the current job. If _j_o_b_s_p_e_c is not present, the shell's notion of the _c_u_r_r_e_n_t _j_o_b - is used. The return value is that of the command placed into - the foreground, or failure if run when job control is disabled + is used. The return value is that of the command placed into + the foreground, or failure if run when job control is disabled or, when run with job control enabled, if _j_o_b_s_p_e_c does not spec- - ify a valid job or _j_o_b_s_p_e_c specifies a job that was started + ify a valid job or _j_o_b_s_p_e_c specifies a job that was started without job control. ggeettooppttss _o_p_t_s_t_r_i_n_g _n_a_m_e [_a_r_g_s] - ggeettooppttss is used by shell procedures to parse positional parame- - ters. _o_p_t_s_t_r_i_n_g contains the option characters to be recog- - nized; if a character is followed by a colon, the option is - expected to have an argument, which should be separated from it - by white space. The colon and question mark characters may not - be used as option characters. Each time it is invoked, ggeettooppttss - places the next option in the shell variable _n_a_m_e, initializing + ggeettooppttss is used by shell procedures to parse positional parame- + ters. _o_p_t_s_t_r_i_n_g contains the option characters to be recog- + nized; if a character is followed by a colon, the option is + expected to have an argument, which should be separated from it + by white space. The colon and question mark characters may not + be used as option characters. Each time it is invoked, ggeettooppttss + places the next option in the shell variable _n_a_m_e, initializing _n_a_m_e if it does not exist, and the index of the next argument to be processed into the variable OOPPTTIINNDD. OOPPTTIINNDD is initialized to - 1 each time the shell or a shell script is invoked. When an - option requires an argument, ggeettooppttss places that argument into - the variable OOPPTTAARRGG. The shell does not reset OOPPTTIINNDD automati- - cally; it must be manually reset between multiple calls to + 1 each time the shell or a shell script is invoked. When an + option requires an argument, ggeettooppttss places that argument into + the variable OOPPTTAARRGG. The shell does not reset OOPPTTIINNDD automati- + cally; it must be manually reset between multiple calls to ggeettooppttss within the same shell invocation if a new set of parame- ters is to be used. - When the end of options is encountered, ggeettooppttss exits with a - return value greater than zero. OOPPTTIINNDD is set to the index of + When the end of options is encountered, ggeettooppttss exits with a + return value greater than zero. OOPPTTIINNDD is set to the index of the first non-option argument, and _n_a_m_e is set to ?. - ggeettooppttss normally parses the positional parameters, but if more + ggeettooppttss normally parses the positional parameters, but if more arguments are given in _a_r_g_s, ggeettooppttss parses those instead. - ggeettooppttss can report errors in two ways. If the first character - of _o_p_t_s_t_r_i_n_g is a colon, _s_i_l_e_n_t error reporting is used. In - normal operation, diagnostic messages are printed when invalid - options or missing option arguments are encountered. If the - variable OOPPTTEERRRR is set to 0, no error messages will be dis- + ggeettooppttss can report errors in two ways. If the first character + of _o_p_t_s_t_r_i_n_g is a colon, _s_i_l_e_n_t error reporting is used. In + normal operation, diagnostic messages are printed when invalid + options or missing option arguments are encountered. If the + variable OOPPTTEERRRR is set to 0, no error messages will be dis- played, even if the first character of _o_p_t_s_t_r_i_n_g is not a colon. If an invalid option is seen, ggeettooppttss places ? into _n_a_m_e and, if - not silent, prints an error message and unsets OOPPTTAARRGG. If - ggeettooppttss is silent, the option character found is placed in + not silent, prints an error message and unsets OOPPTTAARRGG. If + ggeettooppttss is silent, the option character found is placed in OOPPTTAARRGG and no diagnostic message is printed. - If a required argument is not found, and ggeettooppttss is not silent, - a question mark (??) is placed in _n_a_m_e, OOPPTTAARRGG is unset, and a - diagnostic message is printed. If ggeettooppttss is silent, then a - colon (::) is placed in _n_a_m_e and OOPPTTAARRGG is set to the option + If a required argument is not found, and ggeettooppttss is not silent, + a question mark (??) is placed in _n_a_m_e, OOPPTTAARRGG is unset, and a + diagnostic message is printed. If ggeettooppttss is silent, then a + colon (::) is placed in _n_a_m_e and OOPPTTAARRGG is set to the option character found. - ggeettooppttss returns true if an option, specified or unspecified, is + ggeettooppttss returns true if an option, specified or unspecified, is found. It returns false if the end of options is encountered or an error occurs. hhaasshh [--llrr] [--pp _f_i_l_e_n_a_m_e] [--ddtt] [_n_a_m_e] Each time hhaasshh is invoked, the full pathname of the command _n_a_m_e - is determined by searching the directories in $$PPAATTHH and remem- + is determined by searching the directories in $$PPAATTHH and remem- bered. Any previously-remembered pathname is discarded. If the --pp option is supplied, no path search is performed, and _f_i_l_e_n_a_m_e - is used as the full filename of the command. The --rr option - causes the shell to forget all remembered locations. The --dd - option causes the shell to forget the remembered location of - each _n_a_m_e. If the --tt option is supplied, the full pathname to - which each _n_a_m_e corresponds is printed. If multiple _n_a_m_e argu- - ments are supplied with --tt, the _n_a_m_e is printed before the - hashed full pathname. The --ll option causes output to be dis- + is used as the full filename of the command. The --rr option + causes the shell to forget all remembered locations. The --dd + option causes the shell to forget the remembered location of + each _n_a_m_e. If the --tt option is supplied, the full pathname to + which each _n_a_m_e corresponds is printed. If multiple _n_a_m_e argu- + ments are supplied with --tt, the _n_a_m_e is printed before the + hashed full pathname. The --ll option causes output to be dis- played in a format that may be reused as input. If no arguments - are given, or if only --ll is supplied, information about remem- - bered commands is printed. The return status is true unless a + are given, or if only --ll is supplied, information about remem- + bered commands is printed. The return status is true unless a _n_a_m_e is not found or an invalid option is supplied. hheellpp [--ddmmss] [_p_a_t_t_e_r_n] - Display helpful information about builtin commands. If _p_a_t_t_e_r_n - is specified, hheellpp gives detailed help on all commands matching - _p_a_t_t_e_r_n; otherwise help for all the builtins and shell control + Display helpful information about builtin commands. If _p_a_t_t_e_r_n + is specified, hheellpp gives detailed help on all commands matching + _p_a_t_t_e_r_n; otherwise help for all the builtins and shell control structures is printed. --dd Display a short description of each _p_a_t_t_e_r_n --mm Display the description of each _p_a_t_t_e_r_n in a manpage-like @@ -4376,44 +4379,44 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS hhiissttoorryy --ss _a_r_g [_a_r_g _._._.] With no options, display the command history list with line num- bers. Lines listed with a ** have been modified. An argument of - _n lists only the last _n lines. If the shell variable HHIISSTTTTIIMMEE-- - FFOORRMMAATT is set and not null, it is used as a format string for - _s_t_r_f_t_i_m_e(3) to display the time stamp associated with each dis- - played history entry. No intervening blank is printed between - the formatted time stamp and the history line. If _f_i_l_e_n_a_m_e is - supplied, it is used as the name of the history file; if not, - the value of HHIISSTTFFIILLEE is used. Options, if supplied, have the + _n lists only the last _n lines. If the shell variable HHIISSTTTTIIMMEE-- + FFOORRMMAATT is set and not null, it is used as a format string for + _s_t_r_f_t_i_m_e(3) to display the time stamp associated with each dis- + played history entry. No intervening blank is printed between + the formatted time stamp and the history line. If _f_i_l_e_n_a_m_e is + supplied, it is used as the name of the history file; if not, + the value of HHIISSTTFFIILLEE is used. Options, if supplied, have the following meanings: --cc Clear the history list by deleting all the entries. --dd _o_f_f_s_e_t Delete the history entry at position _o_f_f_s_e_t. - --aa Append the ``new'' history lines (history lines entered - since the beginning of the current bbaasshh session) to the + --aa Append the ``new'' history lines (history lines entered + since the beginning of the current bbaasshh session) to the history file. - --nn Read the history lines not already read from the history - file into the current history list. These are lines - appended to the history file since the beginning of the + --nn Read the history lines not already read from the history + file into the current history list. These are lines + appended to the history file since the beginning of the current bbaasshh session. - --rr Read the contents of the history file and append them to + --rr Read the contents of the history file and append them to the current history list. --ww Write the current history list to the history file, over- writing the history file's contents. - --pp Perform history substitution on the following _a_r_g_s and - display the result on the standard output. Does not - store the results in the history list. Each _a_r_g must be + --pp Perform history substitution on the following _a_r_g_s and + display the result on the standard output. Does not + store the results in the history list. Each _a_r_g must be quoted to disable normal history expansion. - --ss Store the _a_r_g_s in the history list as a single entry. - The last command in the history list is removed before + --ss Store the _a_r_g_s in the history list as a single entry. + The last command in the history list is removed before the _a_r_g_s are added. - If the HHIISSTTTTIIMMEEFFOORRMMAATT variable is set, the time stamp informa- - tion associated with each history entry is written to the his- - tory file, marked with the history comment character. When the - history file is read, lines beginning with the history comment - character followed immediately by a digit are interpreted as + If the HHIISSTTTTIIMMEEFFOORRMMAATT variable is set, the time stamp informa- + tion associated with each history entry is written to the his- + tory file, marked with the history comment character. When the + history file is read, lines beginning with the history comment + character followed immediately by a digit are interpreted as timestamps for the previous history line. The return value is 0 - unless an invalid option is encountered, an error occurs while - reading or writing the history file, an invalid _o_f_f_s_e_t is sup- + unless an invalid option is encountered, an error occurs while + reading or writing the history file, an invalid _o_f_f_s_e_t is sup- plied as an argument to --dd, or the history expansion supplied as an argument to --pp fails. @@ -4422,196 +4425,196 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS The first form lists the active jobs. The options have the fol- lowing meanings: --ll List process IDs in addition to the normal information. - --nn Display information only about jobs that have changed - status since the user was last notified of their status. - --pp List only the process ID of the job's process group + --nn Display information only about jobs that have changed + status since the user was last notified of their status. + --pp List only the process ID of the job's process group leader. --rr Display only running jobs. --ss Display only stopped jobs. - If _j_o_b_s_p_e_c is given, output is restricted to information about - that job. The return status is 0 unless an invalid option is + If _j_o_b_s_p_e_c is given, output is restricted to information about + that job. The return status is 0 unless an invalid option is encountered or an invalid _j_o_b_s_p_e_c is supplied. If the --xx option is supplied, jjoobbss replaces any _j_o_b_s_p_e_c found in - _c_o_m_m_a_n_d or _a_r_g_s with the corresponding process group ID, and + _c_o_m_m_a_n_d or _a_r_g_s with the corresponding process group ID, and executes _c_o_m_m_a_n_d passing it _a_r_g_s, returning its exit status. kkiillll [--ss _s_i_g_s_p_e_c | --nn _s_i_g_n_u_m | --_s_i_g_s_p_e_c] [_p_i_d | _j_o_b_s_p_e_c] ... kkiillll --ll [_s_i_g_s_p_e_c | _e_x_i_t___s_t_a_t_u_s] - Send the signal named by _s_i_g_s_p_e_c or _s_i_g_n_u_m to the processes - named by _p_i_d or _j_o_b_s_p_e_c. _s_i_g_s_p_e_c is either a case-insensitive - signal name such as SSIIGGKKIILLLL (with or without the SSIIGG prefix) or - a signal number; _s_i_g_n_u_m is a signal number. If _s_i_g_s_p_e_c is not - present, then SSIIGGTTEERRMM is assumed. An argument of --ll lists the - signal names. If any arguments are supplied when --ll is given, - the names of the signals corresponding to the arguments are + Send the signal named by _s_i_g_s_p_e_c or _s_i_g_n_u_m to the processes + named by _p_i_d or _j_o_b_s_p_e_c. _s_i_g_s_p_e_c is either a case-insensitive + signal name such as SSIIGGKKIILLLL (with or without the SSIIGG prefix) or + a signal number; _s_i_g_n_u_m is a signal number. If _s_i_g_s_p_e_c is not + present, then SSIIGGTTEERRMM is assumed. An argument of --ll lists the + signal names. If any arguments are supplied when --ll is given, + the names of the signals corresponding to the arguments are listed, and the return status is 0. The _e_x_i_t___s_t_a_t_u_s argument to - --ll is a number specifying either a signal number or the exit - status of a process terminated by a signal. kkiillll returns true - if at least one signal was successfully sent, or false if an + --ll is a number specifying either a signal number or the exit + status of a process terminated by a signal. kkiillll returns true + if at least one signal was successfully sent, or false if an error occurs or an invalid option is encountered. lleett _a_r_g [_a_r_g ...] Each _a_r_g is an arithmetic expression to be evaluated (see AARRIITTHH-- - MMEETTIICC EEVVAALLUUAATTIIOONN above). If the last _a_r_g evaluates to 0, lleett + MMEETTIICC EEVVAALLUUAATTIIOONN above). If the last _a_r_g evaluates to 0, lleett returns 1; 0 is returned otherwise. llooccaall [_o_p_t_i_o_n] [_n_a_m_e[=_v_a_l_u_e] ...] - For each argument, a local variable named _n_a_m_e is created, and - assigned _v_a_l_u_e. The _o_p_t_i_o_n can be any of the options accepted + For each argument, a local variable named _n_a_m_e is created, and + assigned _v_a_l_u_e. The _o_p_t_i_o_n can be any of the options accepted by ddeeccllaarree. When llooccaall is used within a function, it causes the - variable _n_a_m_e to have a visible scope restricted to that func- + variable _n_a_m_e to have a visible scope restricted to that func- tion and its children. With no operands, llooccaall writes a list of - local variables to the standard output. It is an error to use + local variables to the standard output. It is an error to use llooccaall when not within a function. The return status is 0 unless - llooccaall is used outside a function, an invalid _n_a_m_e is supplied, + llooccaall is used outside a function, an invalid _n_a_m_e is supplied, or _n_a_m_e is a readonly variable. llooggoouutt Exit a login shell. - mmaappffiillee [--nn _c_o_u_n_t] [--OO _o_r_i_g_i_n] [--ss _c_o_u_n_t] [--tt] [--uu _f_d] [--CC _c_a_l_l_b_a_c_k] + mmaappffiillee [--nn _c_o_u_n_t] [--OO _o_r_i_g_i_n] [--ss _c_o_u_n_t] [--tt] [--uu _f_d] [--CC _c_a_l_l_b_a_c_k] [--cc _q_u_a_n_t_u_m] [_a_r_r_a_y] - rreeaaddaarrrraayy [--nn _c_o_u_n_t] [--OO _o_r_i_g_i_n] [--ss _c_o_u_n_t] [--tt] [--uu _f_d] [--CC _c_a_l_l_b_a_c_k] + rreeaaddaarrrraayy [--nn _c_o_u_n_t] [--OO _o_r_i_g_i_n] [--ss _c_o_u_n_t] [--tt] [--uu _f_d] [--CC _c_a_l_l_b_a_c_k] [--cc _q_u_a_n_t_u_m] [_a_r_r_a_y] - Read lines from the standard input into the indexed array vari- - able _a_r_r_a_y, or from file descriptor _f_d if the --uu option is sup- - plied. The variable MMAAPPFFIILLEE is the default _a_r_r_a_y. Options, if + Read lines from the standard input into the indexed array vari- + able _a_r_r_a_y, or from file descriptor _f_d if the --uu option is sup- + plied. The variable MMAAPPFFIILLEE is the default _a_r_r_a_y. Options, if supplied, have the following meanings: - --nn Copy at most _c_o_u_n_t lines. If _c_o_u_n_t is 0, all lines are + --nn Copy at most _c_o_u_n_t lines. If _c_o_u_n_t is 0, all lines are copied. - --OO Begin assigning to _a_r_r_a_y at index _o_r_i_g_i_n. The default + --OO Begin assigning to _a_r_r_a_y at index _o_r_i_g_i_n. The default index is 0. --ss Discard the first _c_o_u_n_t lines read. --tt Remove a trailing newline from each line read. - --uu Read lines from file descriptor _f_d instead of the stan- + --uu Read lines from file descriptor _f_d instead of the stan- dard input. - --CC Evaluate _c_a_l_l_b_a_c_k each time _q_u_a_n_t_u_m lines are read. The + --CC Evaluate _c_a_l_l_b_a_c_k each time _q_u_a_n_t_u_m lines are read. The --cc option specifies _q_u_a_n_t_u_m. - --cc Specify the number of lines read between each call to + --cc Specify the number of lines read between each call to _c_a_l_l_b_a_c_k. - If --CC is specified without --cc, the default quantum is 5000. + If --CC is specified without --cc, the default quantum is 5000. When _c_a_l_l_b_a_c_k is evaluated, it is supplied the index of the next array element to be assigned and the line to be assigned to that - element as additional arguments. _c_a_l_l_b_a_c_k is evaluated after + element as additional arguments. _c_a_l_l_b_a_c_k is evaluated after the line is read but before the array element is assigned. - If not supplied with an explicit origin, mmaappffiillee will clear + If not supplied with an explicit origin, mmaappffiillee will clear _a_r_r_a_y before assigning to it. - mmaappffiillee returns successfully unless an invalid option or option - argument is supplied, _a_r_r_a_y is invalid or unassignable, or if + mmaappffiillee returns successfully unless an invalid option or option + argument is supplied, _a_r_r_a_y is invalid or unassignable, or if _a_r_r_a_y is not an indexed array. ppooppdd [-nn] [+_n] [-_n] - Removes entries from the directory stack. With no arguments, - removes the top directory from the stack, and performs a ccdd to + Removes entries from the directory stack. With no arguments, + removes the top directory from the stack, and performs a ccdd to the new top directory. Arguments, if supplied, have the follow- ing meanings: - --nn Suppresses the normal change of directory when removing - directories from the stack, so that only the stack is + --nn Suppresses the normal change of directory when removing + directories from the stack, so that only the stack is manipulated. - ++_n Removes the _nth entry counting from the left of the list - shown by ddiirrss, starting with zero. For example: ``popd + ++_n Removes the _nth entry counting from the left of the list + shown by ddiirrss, starting with zero. For example: ``popd +0'' removes the first directory, ``popd +1'' the second. --_n Removes the _nth entry counting from the right of the list - shown by ddiirrss, starting with zero. For example: ``popd - -0'' removes the last directory, ``popd -1'' the next to + shown by ddiirrss, starting with zero. For example: ``popd + -0'' removes the last directory, ``popd -1'' the next to last. - If the ppooppdd command is successful, a ddiirrss is performed as well, - and the return status is 0. ppooppdd returns false if an invalid + If the ppooppdd command is successful, a ddiirrss is performed as well, + and the return status is 0. ppooppdd returns false if an invalid option is encountered, the directory stack is empty, a non-exis- tent directory stack entry is specified, or the directory change fails. pprriinnttff [--vv _v_a_r] _f_o_r_m_a_t [_a_r_g_u_m_e_n_t_s] - Write the formatted _a_r_g_u_m_e_n_t_s to the standard output under the - control of the _f_o_r_m_a_t. The --vv option causes the output to be - assigned to the variable _v_a_r rather than being printed to the + Write the formatted _a_r_g_u_m_e_n_t_s to the standard output under the + control of the _f_o_r_m_a_t. The --vv option causes the output to be + assigned to the variable _v_a_r rather than being printed to the standard output. - The _f_o_r_m_a_t is a character string which contains three types of - objects: plain characters, which are simply copied to standard - output, character escape sequences, which are converted and - copied to the standard output, and format specifications, each - of which causes printing of the next successive _a_r_g_u_m_e_n_t. In + The _f_o_r_m_a_t is a character string which contains three types of + objects: plain characters, which are simply copied to standard + output, character escape sequences, which are converted and + copied to the standard output, and format specifications, each + of which causes printing of the next successive _a_r_g_u_m_e_n_t. In addition to the standard _p_r_i_n_t_f(1) format specifications, pprriinnttff interprets the following extensions: %%bb causes pprriinnttff to expand backslash escape sequences in the corresponding _a_r_g_u_m_e_n_t (except that \\cc terminates output, - backslashes in \\'', \\"", and \\?? are not removed, and octal + backslashes in \\'', \\"", and \\?? are not removed, and octal escapes beginning with \\00 may contain up to four digits). - %%qq causes pprriinnttff to output the corresponding _a_r_g_u_m_e_n_t in a + %%qq causes pprriinnttff to output the corresponding _a_r_g_u_m_e_n_t in a format that can be reused as shell input. %%((_d_a_t_e_f_m_t))TT - causes pprriinnttff to output the date-time string resulting - from using _d_a_t_e_f_m_t as a format string for _s_t_r_f_t_i_m_e(3). + causes pprriinnttff to output the date-time string resulting + from using _d_a_t_e_f_m_t as a format string for _s_t_r_f_t_i_m_e(3). The corresponding _a_r_g_u_m_e_n_t is an integer representing the - number of seconds since the epoch. Two special argument - values may be used: -1 represents the current time, and + number of seconds since the epoch. Two special argument + values may be used: -1 represents the current time, and -2 represents the time the shell was invoked. - Arguments to non-string format specifiers are treated as C con- + Arguments to non-string format specifiers are treated as C con- stants, except that a leading plus or minus sign is allowed, and - if the leading character is a single or double quote, the value + if the leading character is a single or double quote, the value is the ASCII value of the following character. - The _f_o_r_m_a_t is reused as necessary to consume all of the _a_r_g_u_- + The _f_o_r_m_a_t is reused as necessary to consume all of the _a_r_g_u_- _m_e_n_t_s. If the _f_o_r_m_a_t requires more _a_r_g_u_m_e_n_t_s than are supplied, - the extra format specifications behave as if a zero value or - null string, as appropriate, had been supplied. The return + the extra format specifications behave as if a zero value or + null string, as appropriate, had been supplied. The return value is zero on success, non-zero on failure. ppuusshhdd [--nn] [+_n] [-_n] ppuusshhdd [--nn] [_d_i_r] - Adds a directory to the top of the directory stack, or rotates - the stack, making the new top of the stack the current working + Adds a directory to the top of the directory stack, or rotates + the stack, making the new top of the stack the current working directory. With no arguments, exchanges the top two directories - and returns 0, unless the directory stack is empty. Arguments, + and returns 0, unless the directory stack is empty. Arguments, if supplied, have the following meanings: - --nn Suppresses the normal change of directory when adding - directories to the stack, so that only the stack is + --nn Suppresses the normal change of directory when adding + directories to the stack, so that only the stack is manipulated. - ++_n Rotates the stack so that the _nth directory (counting - from the left of the list shown by ddiirrss, starting with + ++_n Rotates the stack so that the _nth directory (counting + from the left of the list shown by ddiirrss, starting with zero) is at the top. - --_n Rotates the stack so that the _nth directory (counting - from the right of the list shown by ddiirrss, starting with + --_n Rotates the stack so that the _nth directory (counting + from the right of the list shown by ddiirrss, starting with zero) is at the top. _d_i_r Adds _d_i_r to the directory stack at the top, making it the - new current working directory as if it had been supplied + new current working directory as if it had been supplied as the argument to the ccdd builtin. If the ppuusshhdd command is successful, a ddiirrss is performed as well. - If the first form is used, ppuusshhdd returns 0 unless the cd to _d_i_r - fails. With the second form, ppuusshhdd returns 0 unless the direc- - tory stack is empty, a non-existent directory stack element is - specified, or the directory change to the specified new current + If the first form is used, ppuusshhdd returns 0 unless the cd to _d_i_r + fails. With the second form, ppuusshhdd returns 0 unless the direc- + tory stack is empty, a non-existent directory stack element is + specified, or the directory change to the specified new current directory fails. ppwwdd [--LLPP] - Print the absolute pathname of the current working directory. + Print the absolute pathname of the current working directory. The pathname printed contains no symbolic links if the --PP option is supplied or the --oo pphhyyssiiccaall option to the sseett builtin command - is enabled. If the --LL option is used, the pathname printed may - contain symbolic links. The return status is 0 unless an error - occurs while reading the name of the current directory or an + is enabled. If the --LL option is used, the pathname printed may + contain symbolic links. The return status is 0 unless an error + occurs while reading the name of the current directory or an invalid option is supplied. rreeaadd [--eerrss] [--aa _a_n_a_m_e] [--dd _d_e_l_i_m] [--ii _t_e_x_t] [--nn _n_c_h_a_r_s] [--NN _n_c_h_a_r_s] [--pp _p_r_o_m_p_t] [--tt _t_i_m_e_o_u_t] [--uu _f_d] [_n_a_m_e ...] - One line is read from the standard input, or from the file - descriptor _f_d supplied as an argument to the --uu option, and the + One line is read from the standard input, or from the file + descriptor _f_d supplied as an argument to the --uu option, and the first word is assigned to the first _n_a_m_e, the second word to the - second _n_a_m_e, and so on, with leftover words and their interven- - ing separators assigned to the last _n_a_m_e. If there are fewer + second _n_a_m_e, and so on, with leftover words and their interven- + ing separators assigned to the last _n_a_m_e. If there are fewer words read from the input stream than names, the remaining names - are assigned empty values. The characters in IIFFSS are used to - split the line into words. The backslash character (\\) may be - used to remove any special meaning for the next character read - and for line continuation. Options, if supplied, have the fol- + are assigned empty values. The characters in IIFFSS are used to + split the line into words. The backslash character (\\) may be + used to remove any special meaning for the next character read + and for line continuation. Options, if supplied, have the fol- lowing meanings: --aa _a_n_a_m_e The words are assigned to sequential indices of the array @@ -4619,137 +4622,139 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS new values are assigned. Other _n_a_m_e arguments are ignored. --dd _d_e_l_i_m - The first character of _d_e_l_i_m is used to terminate the + The first character of _d_e_l_i_m is used to terminate the input line, rather than newline. --ee If the standard input is coming from a terminal, rreeaaddlliinnee - (see RREEAADDLLIINNEE above) is used to obtain the line. Read- - line uses the current (or default, if line editing was + (see RREEAADDLLIINNEE above) is used to obtain the line. Read- + line uses the current (or default, if line editing was not previously active) editing settings. --ii _t_e_x_t - If rreeaaddlliinnee is being used to read the line, _t_e_x_t is + If rreeaaddlliinnee is being used to read the line, _t_e_x_t is placed into the editing buffer before editing begins. --nn _n_c_h_a_r_s - rreeaadd returns after reading _n_c_h_a_r_s characters rather than - waiting for a complete line of input, but honor a delim- - iter if fewer than _n_c_h_a_r_s characters are read before the + rreeaadd returns after reading _n_c_h_a_r_s characters rather than + waiting for a complete line of input, but honor a delim- + iter if fewer than _n_c_h_a_r_s characters are read before the delimiter. --NN _n_c_h_a_r_s - rreeaadd returns after reading exactly _n_c_h_a_r_s characters - rather than waiting for a complete line of input, unless - EOF is encountered or rreeaadd times out. Delimiter charac- - ters encountered in the input are not treated specially - and do not cause rreeaadd to return until _n_c_h_a_r_s characters + rreeaadd returns after reading exactly _n_c_h_a_r_s characters + rather than waiting for a complete line of input, unless + EOF is encountered or rreeaadd times out. Delimiter charac- + ters encountered in the input are not treated specially + and do not cause rreeaadd to return until _n_c_h_a_r_s characters are read. --pp _p_r_o_m_p_t Display _p_r_o_m_p_t on standard error, without a trailing new- line, before attempting to read any input. The prompt is displayed only if input is coming from a terminal. --rr Backslash does not act as an escape character. The back- - slash is considered to be part of the line. In particu- - lar, a backslash-newline pair may not be used as a line + slash is considered to be part of the line. In particu- + lar, a backslash-newline pair may not be used as a line continuation. --ss Silent mode. If input is coming from a terminal, charac- ters are not echoed. --tt _t_i_m_e_o_u_t - Cause rreeaadd to time out and return failure if a complete - line of input is not read within _t_i_m_e_o_u_t seconds. _t_i_m_e_- - _o_u_t may be a decimal number with a fractional portion - following the decimal point. This option is only effec- - tive if rreeaadd is reading input from a terminal, pipe, or - other special file; it has no effect when reading from - regular files. If _t_i_m_e_o_u_t is 0, rreeaadd returns immedi- - ately, without trying to read any data. The exit statis + Cause rreeaadd to time out and return failure if a complete + line of input is not read within _t_i_m_e_o_u_t seconds. _t_i_m_e_- + _o_u_t may be a decimal number with a fractional portion + following the decimal point. This option is only effec- + tive if rreeaadd is reading input from a terminal, pipe, or + other special file; it has no effect when reading from + regular files. If _t_i_m_e_o_u_t is 0, rreeaadd returns immedi- + ately, without trying to read any data. The exit statis is 0 if input is available on the specified file descrip- tor, non-zero otherwise. The exit status is greater than 128 if the timeout is exceeded. --uu _f_d Read input from file descriptor _f_d. If no _n_a_m_e_s are supplied, the line read is assigned to the vari- - able RREEPPLLYY. The return code is zero, unless end-of-file is - encountered, rreeaadd times out (in which case the return code is - greater than 128), or an invalid file descriptor is supplied as + able RREEPPLLYY. The return code is zero, unless end-of-file is + encountered, rreeaadd times out (in which case the return code is + greater than 128), or an invalid file descriptor is supplied as the argument to --uu. rreeaaddoonnllyy [--aaAAff] [--pp] [_n_a_m_e[=_w_o_r_d] ...] - The given _n_a_m_e_s are marked readonly; the values of these _n_a_m_e_s - may not be changed by subsequent assignment. If the --ff option - is supplied, the functions corresponding to the _n_a_m_e_s are so - marked. The --aa option restricts the variables to indexed - arrays; the --AA option restricts the variables to associative - arrays. If both options are supplied, --AA takes precedence. If - no _n_a_m_e arguments are given, or if the --pp option is supplied, a + The given _n_a_m_e_s are marked readonly; the values of these _n_a_m_e_s + may not be changed by subsequent assignment. If the --ff option + is supplied, the functions corresponding to the _n_a_m_e_s are so + marked. The --aa option restricts the variables to indexed + arrays; the --AA option restricts the variables to associative + arrays. If both options are supplied, --AA takes precedence. If + no _n_a_m_e arguments are given, or if the --pp option is supplied, a list of all readonly names is printed. The other options may be - used to restrict the output to a subset of the set of readonly - names. The --pp option causes output to be displayed in a format - that may be reused as input. If a variable name is followed by - =_w_o_r_d, the value of the variable is set to _w_o_r_d. The return - status is 0 unless an invalid option is encountered, one of the + used to restrict the output to a subset of the set of readonly + names. The --pp option causes output to be displayed in a format + that may be reused as input. If a variable name is followed by + =_w_o_r_d, the value of the variable is set to _w_o_r_d. The return + status is 0 unless an invalid option is encountered, one of the _n_a_m_e_s is not a valid shell variable name, or --ff is supplied with a _n_a_m_e that is not a function. rreettuurrnn [_n] - Causes a function to stop executing and return the value speci- - fied by _n to its caller. If _n is omitted, the return status is - that of the last command executed in the function body. If - rreettuurrnn is used outside a function, but during execution of a - script by the .. (ssoouurrccee) command, it causes the shell to stop - executing that script and return either _n or the exit status of - the last command executed within the script as the exit status - of the script. The return status is non-zero if rreettuurrnn is used - outside a function and not during execution of a script by .. or - ssoouurrccee. Any command associated with the RREETTUURRNN trap is executed - before execution resumes after the function or script. + Causes a function to stop executing and return the value speci- + fied by _n to its caller. If _n is omitted, the return status is + that of the last command executed in the function body. If + rreettuurrnn is used outside a function, but during execution of a + script by the .. (ssoouurrccee) command, it causes the shell to stop + executing that script and return either _n or the exit status of + the last command executed within the script as the exit status + of the script. If _n is supplied, the return value is its least + significant 8 bits. The return status is non-zero if rreettuurrnn is + supplied a non-numeric argument, or is used outside a function + and not during execution of a script by .. or ssoouurrccee. Any com- + mand associated with the RREETTUURRNN trap is executed before execu- + tion resumes after the function or script. sseett [----aabbeeffhhkkmmnnppttuuvvxxBBCCEEHHPPTT] [--oo _o_p_t_i_o_n_-_n_a_m_e] [_a_r_g ...] sseett [++aabbeeffhhkkmmnnppttuuvvxxBBCCEEHHPPTT] [++oo _o_p_t_i_o_n_-_n_a_m_e] [_a_r_g ...] - Without options, the name and value of each shell variable are + Without options, the name and value of each shell variable are displayed in a format that can be reused as input for setting or resetting the currently-set variables. Read-only variables can- - not be reset. In _p_o_s_i_x _m_o_d_e, only shell variables are listed. - The output is sorted according to the current locale. When - options are specified, they set or unset shell attributes. Any - arguments remaining after option processing are treated as val- + not be reset. In _p_o_s_i_x _m_o_d_e, only shell variables are listed. + The output is sorted according to the current locale. When + options are specified, they set or unset shell attributes. Any + arguments remaining after option processing are treated as val- ues for the positional parameters and are assigned, in order, to - $$11, $$22, ...... $$_n. Options, if specified, have the following + $$11, $$22, ...... $$_n. Options, if specified, have the following meanings: - --aa Automatically mark variables and functions which are - modified or created for export to the environment of + --aa Automatically mark variables and functions which are + modified or created for export to the environment of subsequent commands. - --bb Report the status of terminated background jobs immedi- + --bb Report the status of terminated background jobs immedi- ately, rather than before the next primary prompt. This is effective only when job control is enabled. - --ee Exit immediately if a _p_i_p_e_l_i_n_e (which may consist of a - single _s_i_m_p_l_e _c_o_m_m_a_n_d), a _l_i_s_t, or a _c_o_m_p_o_u_n_d _c_o_m_m_a_n_d - (see SSHHEELLLL GGRRAAMMMMAARR above), exits with a non-zero sta- - tus. The shell does not exit if the command that fails - is part of the command list immediately following a - wwhhiillee or uunnttiill keyword, part of the test following the - iiff or eelliiff reserved words, part of any command executed - in a &&&& or |||| list except the command following the - final &&&& or ||||, any command in a pipeline but the last, - or if the command's return value is being inverted with - !!. If a compound command other than a subshell returns - a non-zero status because a command failed while --ee was - being ignored, the shell does not exit. A trap on EERRRR, + --ee Exit immediately if a _p_i_p_e_l_i_n_e (which may consist of a + single _s_i_m_p_l_e _c_o_m_m_a_n_d), a _l_i_s_t, or a _c_o_m_p_o_u_n_d _c_o_m_m_a_n_d + (see SSHHEELLLL GGRRAAMMMMAARR above), exits with a non-zero sta- + tus. The shell does not exit if the command that fails + is part of the command list immediately following a + wwhhiillee or uunnttiill keyword, part of the test following the + iiff or eelliiff reserved words, part of any command executed + in a &&&& or |||| list except the command following the + final &&&& or ||||, any command in a pipeline but the last, + or if the command's return value is being inverted with + !!. If a compound command other than a subshell returns + a non-zero status because a command failed while --ee was + being ignored, the shell does not exit. A trap on EERRRR, if set, is executed before the shell exits. This option applies to the shell environment and each subshell envi- - ronment separately (see CCOOMMMMAANNDD EEXXEECCUUTTIIOONN EENNVVIIRROONNMMEENNTT + ronment separately (see CCOOMMMMAANNDD EEXXEECCUUTTIIOONN EENNVVIIRROONNMMEENNTT above), and may cause subshells to exit before executing all the commands in the subshell. --ff Disable pathname expansion. - --hh Remember the location of commands as they are looked up + --hh Remember the location of commands as they are looked up for execution. This is enabled by default. - --kk All arguments in the form of assignment statements are - placed in the environment for a command, not just those + --kk All arguments in the form of assignment statements are + placed in the environment for a command, not just those that precede the command name. - --mm Monitor mode. Job control is enabled. This option is - on by default for interactive shells on systems that - support it (see JJOOBB CCOONNTTRROOLL above). All processes run + --mm Monitor mode. Job control is enabled. This option is + on by default for interactive shells on systems that + support it (see JJOOBB CCOONNTTRROOLL above). All processes run in a separate process group. When a background job com- pletes, the shell prints a line containing its exit sta- tus. --nn Read commands but do not execute them. This may be used - to check a shell script for syntax errors. This is + to check a shell script for syntax errors. This is ignored by interactive shells. --oo _o_p_t_i_o_n_-_n_a_m_e The _o_p_t_i_o_n_-_n_a_m_e can be one of the following: @@ -4757,10 +4762,10 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS Same as --aa. bbrraacceeeexxppaanndd Same as --BB. - eemmaaccss Use an emacs-style command line editing inter- + eemmaaccss Use an emacs-style command line editing inter- face. This is enabled by default when the shell is interactive, unless the shell is started with - the ----nnooeeddiittiinngg option. This also affects the + the ----nnooeeddiittiinngg option. This also affects the editing interface used for rreeaadd --ee. eerrrreexxiitt Same as --ee. eerrrrttrraaccee @@ -4774,8 +4779,8 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS HHIISSTTOORRYY. This option is on by default in inter- active shells. iiggnnoorreeeeooff - The effect is as if the shell command - ``IGNOREEOF=10'' had been executed (see SShheellll + The effect is as if the shell command + ``IGNOREEOF=10'' had been executed (see SShheellll VVaarriiaabblleess above). kkeeyywwoorrdd Same as --kk. mmoonniittoorr Same as --mm. @@ -4790,330 +4795,330 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS pphhyyssiiccaall Same as --PP. ppiippeeffaaiill - If set, the return value of a pipeline is the - value of the last (rightmost) command to exit - with a non-zero status, or zero if all commands - in the pipeline exit successfully. This option + If set, the return value of a pipeline is the + value of the last (rightmost) command to exit + with a non-zero status, or zero if all commands + in the pipeline exit successfully. This option is disabled by default. - ppoossiixx Change the behavior of bbaasshh where the default - operation differs from the POSIX standard to + ppoossiixx Change the behavior of bbaasshh where the default + operation differs from the POSIX standard to match the standard (_p_o_s_i_x _m_o_d_e). pprriivviilleeggeedd Same as --pp. vveerrbboossee Same as --vv. - vvii Use a vi-style command line editing interface. + vvii Use a vi-style command line editing interface. This also affects the editing interface used for rreeaadd --ee. xxttrraaccee Same as --xx. If --oo is supplied with no _o_p_t_i_o_n_-_n_a_m_e, the values of the - current options are printed. If ++oo is supplied with no - _o_p_t_i_o_n_-_n_a_m_e, a series of sseett commands to recreate the - current option settings is displayed on the standard + current options are printed. If ++oo is supplied with no + _o_p_t_i_o_n_-_n_a_m_e, a series of sseett commands to recreate the + current option settings is displayed on the standard output. - --pp Turn on _p_r_i_v_i_l_e_g_e_d mode. In this mode, the $$EENNVV and - $$BBAASSHH__EENNVV files are not processed, shell functions are - not inherited from the environment, and the SSHHEELLLLOOPPTTSS, - BBAASSHHOOPPTTSS, CCDDPPAATTHH, and GGLLOOBBIIGGNNOORREE variables, if they + --pp Turn on _p_r_i_v_i_l_e_g_e_d mode. In this mode, the $$EENNVV and + $$BBAASSHH__EENNVV files are not processed, shell functions are + not inherited from the environment, and the SSHHEELLLLOOPPTTSS, + BBAASSHHOOPPTTSS, CCDDPPAATTHH, and GGLLOOBBIIGGNNOORREE variables, if they appear in the environment, are ignored. If the shell is - started with the effective user (group) id not equal to - the real user (group) id, and the --pp option is not sup- + started with the effective user (group) id not equal to + the real user (group) id, and the --pp option is not sup- plied, these actions are taken and the effective user id - is set to the real user id. If the --pp option is sup- - plied at startup, the effective user id is not reset. - Turning this option off causes the effective user and + is set to the real user id. If the --pp option is sup- + plied at startup, the effective user id is not reset. + Turning this option off causes the effective user and group ids to be set to the real user and group ids. --tt Exit after reading and executing one command. --uu Treat unset variables and parameters other than the spe- - cial parameters "@" and "*" as an error when performing - parameter expansion. If expansion is attempted on an - unset variable or parameter, the shell prints an error - message, and, if not interactive, exits with a non-zero + cial parameters "@" and "*" as an error when performing + parameter expansion. If expansion is attempted on an + unset variable or parameter, the shell prints an error + message, and, if not interactive, exits with a non-zero status. --vv Print shell input lines as they are read. - --xx After expanding each _s_i_m_p_l_e _c_o_m_m_a_n_d, ffoorr command, ccaassee + --xx After expanding each _s_i_m_p_l_e _c_o_m_m_a_n_d, ffoorr command, ccaassee command, sseelleecctt command, or arithmetic ffoorr command, dis- - play the expanded value of PPSS44, followed by the command + play the expanded value of PPSS44, followed by the command and its expanded arguments or associated word list. - --BB The shell performs brace expansion (see BBrraaccee EExxppaannssiioonn + --BB The shell performs brace expansion (see BBrraaccee EExxppaannssiioonn above). This is on by default. - --CC If set, bbaasshh does not overwrite an existing file with - the >>, >>&&, and <<>> redirection operators. This may be + --CC If set, bbaasshh does not overwrite an existing file with + the >>, >>&&, and <<>> redirection operators. This may be overridden when creating output files by using the redi- rection operator >>|| instead of >>. --EE If set, any trap on EERRRR is inherited by shell functions, - command substitutions, and commands executed in a sub- - shell environment. The EERRRR trap is normally not inher- + command substitutions, and commands executed in a sub- + shell environment. The EERRRR trap is normally not inher- ited in such cases. --HH Enable !! style history substitution. This option is on by default when the shell is interactive. - --PP If set, the shell does not follow symbolic links when - executing commands such as ccdd that change the current + --PP If set, the shell does not follow symbolic links when + executing commands such as ccdd that change the current working directory. It uses the physical directory structure instead. By default, bbaasshh follows the logical - chain of directories when performing commands which + chain of directories when performing commands which change the current directory. - --TT If set, any traps on DDEEBBUUGG and RREETTUURRNN are inherited by - shell functions, command substitutions, and commands - executed in a subshell environment. The DDEEBBUUGG and + --TT If set, any traps on DDEEBBUUGG and RREETTUURRNN are inherited by + shell functions, command substitutions, and commands + executed in a subshell environment. The DDEEBBUUGG and RREETTUURRNN traps are normally not inherited in such cases. - ---- If no arguments follow this option, then the positional + ---- If no arguments follow this option, then the positional parameters are unset. Otherwise, the positional parame- - ters are set to the _a_r_gs, even if some of them begin + ters are set to the _a_r_gs, even if some of them begin with a --. - -- Signal the end of options, cause all remaining _a_r_gs to + -- Signal the end of options, cause all remaining _a_r_gs to be assigned to the positional parameters. The --xx and --vv options are turned off. If there are no _a_r_gs, the posi- tional parameters remain unchanged. - The options are off by default unless otherwise noted. Using + - rather than - causes these options to be turned off. The - options can also be specified as arguments to an invocation of - the shell. The current set of options may be found in $$--. The + The options are off by default unless otherwise noted. Using + + rather than - causes these options to be turned off. The + options can also be specified as arguments to an invocation of + the shell. The current set of options may be found in $$--. The return status is always true unless an invalid option is encoun- tered. sshhiifftt [_n] - The positional parameters from _n+1 ... are renamed to $$11 ........ - Parameters represented by the numbers $$## down to $$##-_n+1 are - unset. _n must be a non-negative number less than or equal to - $$##. If _n is 0, no parameters are changed. If _n is not given, - it is assumed to be 1. If _n is greater than $$##, the positional - parameters are not changed. The return status is greater than + The positional parameters from _n+1 ... are renamed to $$11 ........ + Parameters represented by the numbers $$## down to $$##-_n+1 are + unset. _n must be a non-negative number less than or equal to + $$##. If _n is 0, no parameters are changed. If _n is not given, + it is assumed to be 1. If _n is greater than $$##, the positional + parameters are not changed. The return status is greater than zero if _n is greater than $$## or less than zero; otherwise 0. sshhoopptt [--ppqqssuu] [--oo] [_o_p_t_n_a_m_e ...] Toggle the values of variables controlling optional shell behav- ior. With no options, or with the --pp option, a list of all set- table options is displayed, with an indication of whether or not - each is set. The --pp option causes output to be displayed in a - form that may be reused as input. Other options have the fol- + each is set. The --pp option causes output to be displayed in a + form that may be reused as input. Other options have the fol- lowing meanings: --ss Enable (set) each _o_p_t_n_a_m_e. --uu Disable (unset) each _o_p_t_n_a_m_e. - --qq Suppresses normal output (quiet mode); the return status + --qq Suppresses normal output (quiet mode); the return status indicates whether the _o_p_t_n_a_m_e is set or unset. If multi- - ple _o_p_t_n_a_m_e arguments are given with --qq, the return sta- - tus is zero if all _o_p_t_n_a_m_e_s are enabled; non-zero other- + ple _o_p_t_n_a_m_e arguments are given with --qq, the return sta- + tus is zero if all _o_p_t_n_a_m_e_s are enabled; non-zero other- wise. - --oo Restricts the values of _o_p_t_n_a_m_e to be those defined for + --oo Restricts the values of _o_p_t_n_a_m_e to be those defined for the --oo option to the sseett builtin. - If either --ss or --uu is used with no _o_p_t_n_a_m_e arguments, sshhoopptt - shows only those options which are set or unset, respectively. - Unless otherwise noted, the sshhoopptt options are disabled (unset) + If either --ss or --uu is used with no _o_p_t_n_a_m_e arguments, sshhoopptt + shows only those options which are set or unset, respectively. + Unless otherwise noted, the sshhoopptt options are disabled (unset) by default. - The return status when listing options is zero if all _o_p_t_n_a_m_e_s - are enabled, non-zero otherwise. When setting or unsetting - options, the return status is zero unless an _o_p_t_n_a_m_e is not a + The return status when listing options is zero if all _o_p_t_n_a_m_e_s + are enabled, non-zero otherwise. When setting or unsetting + options, the return status is zero unless an _o_p_t_n_a_m_e is not a valid shell option. The list of sshhoopptt options is: - aauuttooccdd If set, a command name that is the name of a directory - is executed as if it were the argument to the ccdd com- + aauuttooccdd If set, a command name that is the name of a directory + is executed as if it were the argument to the ccdd com- mand. This option is only used by interactive shells. ccddaabbllee__vvaarrss - If set, an argument to the ccdd builtin command that is - not a directory is assumed to be the name of a variable + If set, an argument to the ccdd builtin command that is + not a directory is assumed to be the name of a variable whose value is the directory to change to. ccddssppeellll If set, minor errors in the spelling of a directory com- - ponent in a ccdd command will be corrected. The errors + ponent in a ccdd command will be corrected. The errors checked for are transposed characters, a missing charac- - ter, and one character too many. If a correction is - found, the corrected filename is printed, and the com- - mand proceeds. This option is only used by interactive + ter, and one character too many. If a correction is + found, the corrected filename is printed, and the com- + mand proceeds. This option is only used by interactive shells. cchheecckkhhaasshh If set, bbaasshh checks that a command found in the hash ta- - ble exists before trying to execute it. If a hashed - command no longer exists, a normal path search is per- + ble exists before trying to execute it. If a hashed + command no longer exists, a normal path search is per- formed. cchheecckkjjoobbss If set, bbaasshh lists the status of any stopped and running - jobs before exiting an interactive shell. If any jobs + jobs before exiting an interactive shell. If any jobs are running, this causes the exit to be deferred until a - second exit is attempted without an intervening command - (see JJOOBB CCOONNTTRROOLL above). The shell always postpones + second exit is attempted without an intervening command + (see JJOOBB CCOONNTTRROOLL above). The shell always postpones exiting if any jobs are stopped. cchheecckkwwiinnssiizzee - If set, bbaasshh checks the window size after each command - and, if necessary, updates the values of LLIINNEESS and CCOOLL-- + If set, bbaasshh checks the window size after each command + and, if necessary, updates the values of LLIINNEESS and CCOOLL-- UUMMNNSS. - ccmmddhhiisstt If set, bbaasshh attempts to save all lines of a multiple- - line command in the same history entry. This allows + ccmmddhhiisstt If set, bbaasshh attempts to save all lines of a multiple- + line command in the same history entry. This allows easy re-editing of multi-line commands. ccoommppaatt3311 If set, bbaasshh changes its behavior to that of version 3.1 - with respect to quoted arguments to the [[[[ conditional + with respect to quoted arguments to the [[[[ conditional command's ==~~ operator. ccoommppaatt3322 If set, bbaasshh changes its behavior to that of version 3.2 - with respect to locale-specific string comparison when - using the [[[[ conditional command's << and >> operators. - Bash versions prior to bash-4.1 use ASCII collation and - _s_t_r_c_m_p(3); bash-4.1 and later use the current locale's + with respect to locale-specific string comparison when + using the [[[[ conditional command's << and >> operators. + Bash versions prior to bash-4.1 use ASCII collation and + _s_t_r_c_m_p(3); bash-4.1 and later use the current locale's collation sequence and _s_t_r_c_o_l_l(3). ccoommppaatt4400 If set, bbaasshh changes its behavior to that of version 4.0 - with respect to locale-specific string comparison when - using the [[[[ conditional command's << and >> operators - (see previous item) and the effect of interrupting a + with respect to locale-specific string comparison when + using the [[[[ conditional command's << and >> operators + (see previous item) and the effect of interrupting a command list. ccoommppaatt4411 - If set, bbaasshh, when in posix mode, treats a single quote - in a double-quoted parameter expansion as a special - character. The single quotes must match (an even num- - ber) and the characters between the single quotes are - considered quoted. This is the behavior of posix mode - through version 4.1. The default bash behavior remains + If set, bbaasshh, when in posix mode, treats a single quote + in a double-quoted parameter expansion as a special + character. The single quotes must match (an even num- + ber) and the characters between the single quotes are + considered quoted. This is the behavior of posix mode + through version 4.1. The default bash behavior remains as in previous versions. ccoommpplleettee__ffuullllqquuoottee - If set, bbaasshh quotes all shell metacharacters in file- - names and directory names when performing completion. + If set, bbaasshh quotes all shell metacharacters in file- + names and directory names when performing completion. If not set, bbaasshh removes metacharacters such as the dol- - lar sign from the set of characters that will be quoted - in completed filenames when these metacharacters appear - in shell variable references in words to be completed. - This means that dollar signs in variable names that - expand to directories will not be quoted; however, any - dollar signs appearing in filenames will not be quoted, - either. This is active only when bash is using back- - slashes to quote completed filenames. This variable is - set by default, which is the default bash behavior in + lar sign from the set of characters that will be quoted + in completed filenames when these metacharacters appear + in shell variable references in words to be completed. + This means that dollar signs in variable names that + expand to directories will not be quoted; however, any + dollar signs appearing in filenames will not be quoted, + either. This is active only when bash is using back- + slashes to quote completed filenames. This variable is + set by default, which is the default bash behavior in versions through 4.2. ddiirreexxppaanndd - If set, bbaasshh replaces directory names with the results - of word expansion when performing filename completion. + If set, bbaasshh replaces directory names with the results + of word expansion when performing filename completion. This changes the contents of the readline editing - buffer. If not set, bbaasshh attempts to preserve what the + buffer. If not set, bbaasshh attempts to preserve what the user typed. ddiirrssppeellll - If set, bbaasshh attempts spelling correction on directory - names during word completion if the directory name ini- + If set, bbaasshh attempts spelling correction on directory + names during word completion if the directory name ini- tially supplied does not exist. - ddoottgglloobb If set, bbaasshh includes filenames beginning with a `.' in + ddoottgglloobb If set, bbaasshh includes filenames beginning with a `.' in the results of pathname expansion. eexxeeccffaaiill If set, a non-interactive shell will not exit if it can- - not execute the file specified as an argument to the - eexxeecc builtin command. An interactive shell does not + not execute the file specified as an argument to the + eexxeecc builtin command. An interactive shell does not exit if eexxeecc fails. eexxppaanndd__aalliiaasseess - If set, aliases are expanded as described above under + If set, aliases are expanded as described above under AALLIIAASSEESS. This option is enabled by default for interac- tive shells. eexxttddeebbuugg - If set, behavior intended for use by debuggers is + If set, behavior intended for use by debuggers is enabled: 11.. The --FF option to the ddeeccllaarree builtin displays the source file name and line number corresponding to each function name supplied as an argument. - 22.. If the command run by the DDEEBBUUGG trap returns a - non-zero value, the next command is skipped and + 22.. If the command run by the DDEEBBUUGG trap returns a + non-zero value, the next command is skipped and not executed. - 33.. If the command run by the DDEEBBUUGG trap returns a - value of 2, and the shell is executing in a sub- - routine (a shell function or a shell script exe- - cuted by the .. or ssoouurrccee builtins), a call to + 33.. If the command run by the DDEEBBUUGG trap returns a + value of 2, and the shell is executing in a sub- + routine (a shell function or a shell script exe- + cuted by the .. or ssoouurrccee builtins), a call to rreettuurrnn is simulated. - 44.. BBAASSHH__AARRGGCC and BBAASSHH__AARRGGVV are updated as described + 44.. BBAASSHH__AARRGGCC and BBAASSHH__AARRGGVV are updated as described in their descriptions above. - 55.. Function tracing is enabled: command substitu- + 55.. Function tracing is enabled: command substitu- tion, shell functions, and subshells invoked with (( _c_o_m_m_a_n_d )) inherit the DDEEBBUUGG and RREETTUURRNN traps. - 66.. Error tracing is enabled: command substitution, - shell functions, and subshells invoked with (( + 66.. Error tracing is enabled: command substitution, + shell functions, and subshells invoked with (( _c_o_m_m_a_n_d )) inherit the EERRRR trap. eexxttgglloobb If set, the extended pattern matching features described above under PPaatthhnnaammee EExxppaannssiioonn are enabled. eexxttqquuoottee - If set, $$'_s_t_r_i_n_g' and $$"_s_t_r_i_n_g" quoting is performed - within $${{_p_a_r_a_m_e_t_e_r}} expansions enclosed in double + If set, $$'_s_t_r_i_n_g' and $$"_s_t_r_i_n_g" quoting is performed + within $${{_p_a_r_a_m_e_t_e_r}} expansions enclosed in double quotes. This option is enabled by default. ffaaiillgglloobb - If set, patterns which fail to match filenames during + If set, patterns which fail to match filenames during pathname expansion result in an expansion error. ffoorrccee__ffiiggnnoorree - If set, the suffixes specified by the FFIIGGNNOORREE shell - variable cause words to be ignored when performing word + If set, the suffixes specified by the FFIIGGNNOORREE shell + variable cause words to be ignored when performing word completion even if the ignored words are the only possi- ble completions. See SSHHEELLLL VVAARRIIAABBLLEESS above for a - description of FFIIGGNNOORREE. This option is enabled by + description of FFIIGGNNOORREE. This option is enabled by default. gglloobbaasscciiiirraannggeess - If set, range expressions used in pattern matching (see - PPaatttteerrnn MMaattcchhiinngg above) behave as if in the traditional + If set, range expressions used in pattern matching (see + PPaatttteerrnn MMaattcchhiinngg above) behave as if in the traditional C locale when performing comparisons. That is, the cur- - rent locale's collating sequence is not taken into - account, so bb will not collate between AA and BB, and - upper-case and lower-case ASCII characters will collate + rent locale's collating sequence is not taken into + account, so bb will not collate between AA and BB, and + upper-case and lower-case ASCII characters will collate together. gglloobbssttaarr If set, the pattern **** used in a pathname expansion con- - text will match all files and zero or more directories - and subdirectories. If the pattern is followed by a //, + text will match all files and zero or more directories + and subdirectories. If the pattern is followed by a //, only directories and subdirectories match. ggnnuu__eerrrrffmmtt If set, shell error messages are written in the standard GNU error message format. hhiissttaappppeenndd - If set, the history list is appended to the file named - by the value of the HHIISSTTFFIILLEE variable when the shell + If set, the history list is appended to the file named + by the value of the HHIISSTTFFIILLEE variable when the shell exits, rather than overwriting the file. hhiissttrreeeeddiitt - If set, and rreeaaddlliinnee is being used, a user is given the + If set, and rreeaaddlliinnee is being used, a user is given the opportunity to re-edit a failed history substitution. hhiissttvveerriiffyy - If set, and rreeaaddlliinnee is being used, the results of his- - tory substitution are not immediately passed to the - shell parser. Instead, the resulting line is loaded + If set, and rreeaaddlliinnee is being used, the results of his- + tory substitution are not immediately passed to the + shell parser. Instead, the resulting line is loaded into the rreeaaddlliinnee editing buffer, allowing further modi- fication. hhoossttccoommpplleettee If set, and rreeaaddlliinnee is being used, bbaasshh will attempt to - perform hostname completion when a word containing a @@ - is being completed (see CCoommpplleettiinngg under RREEAADDLLIINNEE + perform hostname completion when a word containing a @@ + is being completed (see CCoommpplleettiinngg under RREEAADDLLIINNEE above). This is enabled by default. hhuuppoonneexxiitt If set, bbaasshh will send SSIIGGHHUUPP to all jobs when an inter- active login shell exits. iinntteerraaccttiivvee__ccoommmmeennttss If set, allow a word beginning with ## to cause that word - and all remaining characters on that line to be ignored - in an interactive shell (see CCOOMMMMEENNTTSS above). This + and all remaining characters on that line to be ignored + in an interactive shell (see CCOOMMMMEENNTTSS above). This option is enabled by default. llaassttppiippee - If set, and job control is not active, the shell runs + If set, and job control is not active, the shell runs the last command of a pipeline not executed in the back- ground in the current shell environment. - lliitthhiisstt If set, and the ccmmddhhiisstt option is enabled, multi-line + lliitthhiisstt If set, and the ccmmddhhiisstt option is enabled, multi-line commands are saved to the history with embedded newlines rather than using semicolon separators where possible. llooggiinn__sshheellll - The shell sets this option if it is started as a login - shell (see IINNVVOOCCAATTIIOONN above). The value may not be + The shell sets this option if it is started as a login + shell (see IINNVVOOCCAATTIIOONN above). The value may not be changed. mmaaiillwwaarrnn - If set, and a file that bbaasshh is checking for mail has - been accessed since the last time it was checked, the - message ``The mail in _m_a_i_l_f_i_l_e has been read'' is dis- + If set, and a file that bbaasshh is checking for mail has + been accessed since the last time it was checked, the + message ``The mail in _m_a_i_l_f_i_l_e has been read'' is dis- played. nnoo__eemmppttyy__ccmmdd__ccoommpplleettiioonn - If set, and rreeaaddlliinnee is being used, bbaasshh will not + If set, and rreeaaddlliinnee is being used, bbaasshh will not attempt to search the PPAATTHH for possible completions when completion is attempted on an empty line. nnooccaasseegglloobb - If set, bbaasshh matches filenames in a case-insensitive + If set, bbaasshh matches filenames in a case-insensitive fashion when performing pathname expansion (see PPaatthhnnaammee EExxppaannssiioonn above). nnooccaasseemmaattcchh - If set, bbaasshh matches patterns in a case-insensitive + If set, bbaasshh matches patterns in a case-insensitive fashion when performing matching while executing ccaassee or [[[[ conditional commands. nnuullllgglloobb - If set, bbaasshh allows patterns which match no files (see - PPaatthhnnaammee EExxppaannssiioonn above) to expand to a null string, + If set, bbaasshh allows patterns which match no files (see + PPaatthhnnaammee EExxppaannssiioonn above) to expand to a null string, rather than themselves. pprrooggccoommpp If set, the programmable completion facilities (see PPrroo-- @@ -5121,50 +5126,50 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS enabled by default. pprroommppttvvaarrss If set, prompt strings undergo parameter expansion, com- - mand substitution, arithmetic expansion, and quote - removal after being expanded as described in PPRROOMMPPTTIINNGG + mand substitution, arithmetic expansion, and quote + removal after being expanded as described in PPRROOMMPPTTIINNGG above. This option is enabled by default. rreessttrriicctteedd__sshheellll - The shell sets this option if it is started in + The shell sets this option if it is started in restricted mode (see RREESSTTRRIICCTTEEDD SSHHEELLLL below). The value - may not be changed. This is not reset when the startup - files are executed, allowing the startup files to dis- + may not be changed. This is not reset when the startup + files are executed, allowing the startup files to dis- cover whether or not a shell is restricted. sshhiifftt__vveerrbboossee - If set, the sshhiifftt builtin prints an error message when + If set, the sshhiifftt builtin prints an error message when the shift count exceeds the number of positional parame- ters. ssoouurrcceeppaatthh If set, the ssoouurrccee (..) builtin uses the value of PPAATTHH to - find the directory containing the file supplied as an + find the directory containing the file supplied as an argument. This option is enabled by default. xxppgg__eecchhoo - If set, the eecchhoo builtin expands backslash-escape + If set, the eecchhoo builtin expands backslash-escape sequences by default. ssuussppeenndd [--ff] - Suspend the execution of this shell until it receives a SSIIGGCCOONNTT + Suspend the execution of this shell until it receives a SSIIGGCCOONNTT signal. A login shell cannot be suspended; the --ff option can be used to override this and force the suspension. The return sta- - tus is 0 unless the shell is a login shell and --ff is not sup- + tus is 0 unless the shell is a login shell and --ff is not sup- plied, or if job control is not enabled. tteesstt _e_x_p_r [[ _e_x_p_r ]] Return a status of 0 (true) or 1 (false) depending on the evalu- ation of the conditional expression _e_x_p_r. Each operator and op- - erand must be a separate argument. Expressions are composed of - the primaries described above under CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS. - tteesstt does not accept any options, nor does it accept and ignore + erand must be a separate argument. Expressions are composed of + the primaries described above under CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS. + tteesstt does not accept any options, nor does it accept and ignore an argument of ---- as signifying the end of options. - Expressions may be combined using the following operators, + Expressions may be combined using the following operators, listed in decreasing order of precedence. The evaluation - depends on the number of arguments; see below. Operator prece- + depends on the number of arguments; see below. Operator prece- dence is used when there are five or more arguments. !! _e_x_p_r True if _e_x_p_r is false. (( _e_x_p_r )) - Returns the value of _e_x_p_r. This may be used to override + Returns the value of _e_x_p_r. This may be used to override the normal precedence of operators. _e_x_p_r_1 -aa _e_x_p_r_2 True if both _e_x_p_r_1 and _e_x_p_r_2 are true. @@ -5181,63 +5186,63 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS null. 2 arguments If the first argument is !!, the expression is true if and - only if the second argument is null. If the first argu- - ment is one of the unary conditional operators listed - above under CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS, the expression is + only if the second argument is null. If the first argu- + ment is one of the unary conditional operators listed + above under CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS, the expression is true if the unary test is true. If the first argument is not a valid unary conditional operator, the expression is false. 3 arguments The following conditions are applied in the order listed. - If the second argument is one of the binary conditional + If the second argument is one of the binary conditional operators listed above under CCOONNDDIITTIIOONNAALL EEXXPPRREESSSSIIOONNSS, the result of the expression is the result of the binary test - using the first and third arguments as operands. The --aa - and --oo operators are considered binary operators when - there are three arguments. If the first argument is !!, - the value is the negation of the two-argument test using + using the first and third arguments as operands. The --aa + and --oo operators are considered binary operators when + there are three arguments. If the first argument is !!, + the value is the negation of the two-argument test using the second and third arguments. If the first argument is exactly (( and the third argument is exactly )), the result - is the one-argument test of the second argument. Other- + is the one-argument test of the second argument. Other- wise, the expression is false. 4 arguments If the first argument is !!, the result is the negation of - the three-argument expression composed of the remaining + the three-argument expression composed of the remaining arguments. Otherwise, the expression is parsed and eval- - uated according to precedence using the rules listed + uated according to precedence using the rules listed above. 5 or more arguments - The expression is parsed and evaluated according to + The expression is parsed and evaluated according to precedence using the rules listed above. - When used with tteesstt or [[, the << and >> operators sort lexico- + When used with tteesstt or [[, the << and >> operators sort lexico- graphically using ASCII ordering. - ttiimmeess Print the accumulated user and system times for the shell and + ttiimmeess Print the accumulated user and system times for the shell and for processes run from the shell. The return status is 0. ttrraapp [--llpp] [[_a_r_g] _s_i_g_s_p_e_c ...] - The command _a_r_g is to be read and executed when the shell - receives signal(s) _s_i_g_s_p_e_c. If _a_r_g is absent (and there is a - single _s_i_g_s_p_e_c) or --, each specified signal is reset to its - original disposition (the value it had upon entrance to the - shell). If _a_r_g is the null string the signal specified by each - _s_i_g_s_p_e_c is ignored by the shell and by the commands it invokes. - If _a_r_g is not present and --pp has been supplied, then the trap - commands associated with each _s_i_g_s_p_e_c are displayed. If no - arguments are supplied or if only --pp is given, ttrraapp prints the - list of commands associated with each signal. The --ll option - causes the shell to print a list of signal names and their cor- - responding numbers. Each _s_i_g_s_p_e_c is either a signal name - defined in <_s_i_g_n_a_l_._h>, or a signal number. Signal names are + The command _a_r_g is to be read and executed when the shell + receives signal(s) _s_i_g_s_p_e_c. If _a_r_g is absent (and there is a + single _s_i_g_s_p_e_c) or --, each specified signal is reset to its + original disposition (the value it had upon entrance to the + shell). If _a_r_g is the null string the signal specified by each + _s_i_g_s_p_e_c is ignored by the shell and by the commands it invokes. + If _a_r_g is not present and --pp has been supplied, then the trap + commands associated with each _s_i_g_s_p_e_c are displayed. If no + arguments are supplied or if only --pp is given, ttrraapp prints the + list of commands associated with each signal. The --ll option + causes the shell to print a list of signal names and their cor- + responding numbers. Each _s_i_g_s_p_e_c is either a signal name + defined in <_s_i_g_n_a_l_._h>, or a signal number. Signal names are case insensitive and the SSIIGG prefix is optional. - If a _s_i_g_s_p_e_c is EEXXIITT (0) the command _a_r_g is executed on exit - from the shell. If a _s_i_g_s_p_e_c is DDEEBBUUGG, the command _a_r_g is exe- - cuted before every _s_i_m_p_l_e _c_o_m_m_a_n_d, _f_o_r command, _c_a_s_e command, - _s_e_l_e_c_t command, every arithmetic _f_o_r command, and before the - first command executes in a shell function (see SSHHEELLLL GGRRAAMMMMAARR - above). Refer to the description of the eexxttddeebbuugg option to the + If a _s_i_g_s_p_e_c is EEXXIITT (0) the command _a_r_g is executed on exit + from the shell. If a _s_i_g_s_p_e_c is DDEEBBUUGG, the command _a_r_g is exe- + cuted before every _s_i_m_p_l_e _c_o_m_m_a_n_d, _f_o_r command, _c_a_s_e command, + _s_e_l_e_c_t command, every arithmetic _f_o_r command, and before the + first command executes in a shell function (see SSHHEELLLL GGRRAAMMMMAARR + above). Refer to the description of the eexxttddeebbuugg option to the sshhoopptt builtin for details of its effect on the DDEEBBUUGG trap. If a _s_i_g_s_p_e_c is RREETTUURRNN, the command _a_r_g is executed each time a shell function or a script executed with the .. or ssoouurrccee builtins fin- @@ -5245,53 +5250,53 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS If a _s_i_g_s_p_e_c is EERRRR, the command _a_r_g is executed whenever a sim- ple command has a non-zero exit status, subject to the following - conditions. The EERRRR trap is not executed if the failed command - is part of the command list immediately following a wwhhiillee or - uunnttiill keyword, part of the test in an _i_f statement, part of a - command executed in a &&&& or |||| list, or if the command's return - value is being inverted via !!. These are the same conditions + conditions. The EERRRR trap is not executed if the failed command + is part of the command list immediately following a wwhhiillee or + uunnttiill keyword, part of the test in an _i_f statement, part of a + command executed in a &&&& or |||| list, or if the command's return + value is being inverted via !!. These are the same conditions obeyed by the eerrrreexxiitt option. - Signals ignored upon entry to the shell cannot be trapped or - reset. Trapped signals that are not being ignored are reset to + Signals ignored upon entry to the shell cannot be trapped or + reset. Trapped signals that are not being ignored are reset to their original values in a subshell or subshell environment when - one is created. The return status is false if any _s_i_g_s_p_e_c is + one is created. The return status is false if any _s_i_g_s_p_e_c is invalid; otherwise ttrraapp returns true. ttyyppee [--aaffttppPP] _n_a_m_e [_n_a_m_e ...] - With no options, indicate how each _n_a_m_e would be interpreted if + With no options, indicate how each _n_a_m_e would be interpreted if used as a command name. If the --tt option is used, ttyyppee prints a - string which is one of _a_l_i_a_s, _k_e_y_w_o_r_d, _f_u_n_c_t_i_o_n, _b_u_i_l_t_i_n, or - _f_i_l_e if _n_a_m_e is an alias, shell reserved word, function, - builtin, or disk file, respectively. If the _n_a_m_e is not found, - then nothing is printed, and an exit status of false is - returned. If the --pp option is used, ttyyppee either returns the + string which is one of _a_l_i_a_s, _k_e_y_w_o_r_d, _f_u_n_c_t_i_o_n, _b_u_i_l_t_i_n, or + _f_i_l_e if _n_a_m_e is an alias, shell reserved word, function, + builtin, or disk file, respectively. If the _n_a_m_e is not found, + then nothing is printed, and an exit status of false is + returned. If the --pp option is used, ttyyppee either returns the name of the disk file that would be executed if _n_a_m_e were speci- fied as a command name, or nothing if ``type -t name'' would not - return _f_i_l_e. The --PP option forces a PPAATTHH search for each _n_a_m_e, + return _f_i_l_e. The --PP option forces a PPAATTHH search for each _n_a_m_e, even if ``type -t name'' would not return _f_i_l_e. If a command is hashed, --pp and --PP print the hashed value, which is not necessar- - ily the file that appears first in PPAATTHH. If the --aa option is - used, ttyyppee prints all of the places that contain an executable + ily the file that appears first in PPAATTHH. If the --aa option is + used, ttyyppee prints all of the places that contain an executable named _n_a_m_e. This includes aliases and functions, if and only if the --pp option is not also used. The table of hashed commands is - not consulted when using --aa. The --ff option suppresses shell + not consulted when using --aa. The --ff option suppresses shell function lookup, as with the ccoommmmaanndd builtin. ttyyppee returns true if all of the arguments are found, false if any are not found. uulliimmiitt [--HHSSTTaabbccddeeffiillmmnnppqqrrssttuuvvxx [_l_i_m_i_t]] - Provides control over the resources available to the shell and - to processes started by it, on systems that allow such control. + Provides control over the resources available to the shell and + to processes started by it, on systems that allow such control. The --HH and --SS options specify that the hard or soft limit is set - for the given resource. A hard limit cannot be increased by a - non-root user once it is set; a soft limit may be increased up - to the value of the hard limit. If neither --HH nor --SS is speci- + for the given resource. A hard limit cannot be increased by a + non-root user once it is set; a soft limit may be increased up + to the value of the hard limit. If neither --HH nor --SS is speci- fied, both the soft and hard limits are set. The value of _l_i_m_i_t can be a number in the unit specified for the resource or one of the special values hhaarrdd, ssoofftt, or uunnlliimmiitteedd, which stand for the - current hard limit, the current soft limit, and no limit, - respectively. If _l_i_m_i_t is omitted, the current value of the - soft limit of the resource is printed, unless the --HH option is + current hard limit, the current soft limit, and no limit, + respectively. If _l_i_m_i_t is omitted, the current value of the + soft limit of the resource is printed, unless the --HH option is given. When more than one resource is specified, the limit name and unit are printed before the value. Other options are inter- preted as follows: @@ -5300,11 +5305,11 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS --cc The maximum size of core files created --dd The maximum size of a process's data segment --ee The maximum scheduling priority ("nice") - --ff The maximum size of files written by the shell and its + --ff The maximum size of files written by the shell and its children --ii The maximum number of pending signals --ll The maximum size that may be locked into memory - --mm The maximum resident set size (many systems do not honor + --mm The maximum resident set size (many systems do not honor this limit) --nn The maximum number of open file descriptors (most systems do not allow this value to be set) @@ -5313,68 +5318,68 @@ SSHHEELLLL BBUUIILLTTIINN CCOOMMMMAANNDDSS --rr The maximum real-time scheduling priority --ss The maximum stack size --tt The maximum amount of cpu time in seconds - --uu The maximum number of processes available to a single + --uu The maximum number of processes available to a single user - --vv The maximum amount of virtual memory available to the + --vv The maximum amount of virtual memory available to the shell and, on some systems, to its children --xx The maximum number of file locks --TT The maximum number of threads - If _l_i_m_i_t is given, and the --aa option is not used, _l_i_m_i_t is the - new value of the specified resource. If no option is given, - then --ff is assumed. Values are in 1024-byte increments, except - for --tt, which is in seconds; --pp, which is in units of 512-byte - blocks; and --TT, --bb, --nn, and --uu, which are unscaled values. The - return status is 0 unless an invalid option or argument is sup- + If _l_i_m_i_t is given, and the --aa option is not used, _l_i_m_i_t is the + new value of the specified resource. If no option is given, + then --ff is assumed. Values are in 1024-byte increments, except + for --tt, which is in seconds; --pp, which is in units of 512-byte + blocks; and --TT, --bb, --nn, and --uu, which are unscaled values. The + return status is 0 unless an invalid option or argument is sup- plied, or an error occurs while setting a new limit. uummaasskk [--pp] [--SS] [_m_o_d_e] The user file-creation mask is set to _m_o_d_e. If _m_o_d_e begins with - a digit, it is interpreted as an octal number; otherwise it is - interpreted as a symbolic mode mask similar to that accepted by - _c_h_m_o_d(1). If _m_o_d_e is omitted, the current value of the mask is - printed. The --SS option causes the mask to be printed in sym- - bolic form; the default output is an octal number. If the --pp + a digit, it is interpreted as an octal number; otherwise it is + interpreted as a symbolic mode mask similar to that accepted by + _c_h_m_o_d(1). If _m_o_d_e is omitted, the current value of the mask is + printed. The --SS option causes the mask to be printed in sym- + bolic form; the default output is an octal number. If the --pp option is supplied, and _m_o_d_e is omitted, the output is in a form that may be reused as input. The return status is 0 if the mode - was successfully changed or if no _m_o_d_e argument was supplied, + was successfully changed or if no _m_o_d_e argument was supplied, and false otherwise. uunnaalliiaass [-aa] [_n_a_m_e ...] - Remove each _n_a_m_e from the list of defined aliases. If --aa is - supplied, all alias definitions are removed. The return value + Remove each _n_a_m_e from the list of defined aliases. If --aa is + supplied, all alias definitions are removed. The return value is true unless a supplied _n_a_m_e is not a defined alias. uunnsseett [-ffvv] [_n_a_m_e ...] - For each _n_a_m_e, remove the corresponding variable or function. + For each _n_a_m_e, remove the corresponding variable or function. If the --vv option is given, each _n_a_m_e refers to a shell variable, - and that variable is removed. Read-only variables may not be - unset. If --ff is specified, each _n_a_m_e refers to a shell func- + and that variable is removed. Read-only variables may not be + unset. If --ff is specified, each _n_a_m_e refers to a shell func- tion, and the function definition is removed. If no options are - supplied, each _n_a_m_e refers to a variable; if there is no vari- - able by that name, any function with that name is unset. Each - unset variable or function is removed from the environment - passed to subsequent commands. If any of CCOOMMPP__WWOORRDDBBRREEAAKKSS, RRAANN-- + supplied, each _n_a_m_e refers to a variable; if there is no vari- + able by that name, any function with that name is unset. Each + unset variable or function is removed from the environment + passed to subsequent commands. If any of CCOOMMPP__WWOORRDDBBRREEAAKKSS, RRAANN-- DDOOMM, SSEECCOONNDDSS, LLIINNEENNOO, HHIISSTTCCMMDD, FFUUNNCCNNAAMMEE, GGRROOUUPPSS, or DDIIRRSSTTAACCKK are unset, they lose their special properties, even if they are sub- sequently reset. The exit status is true unless a _n_a_m_e is read- only. wwaaiitt [_n _._._.] - Wait for each specified process and return its termination sta- - tus. Each _n may be a process ID or a job specification; if a - job spec is given, all processes in that job's pipeline are - waited for. If _n is not given, all currently active child pro- - cesses are waited for, and the return status is zero. If _n - specifies a non-existent process or job, the return status is - 127. Otherwise, the return status is the exit status of the + Wait for each specified process and return its termination sta- + tus. Each _n may be a process ID or a job specification; if a + job spec is given, all processes in that job's pipeline are + waited for. If _n is not given, all currently active child pro- + cesses are waited for, and the return status is zero. If _n + specifies a non-existent process or job, the return status is + 127. Otherwise, the return status is the exit status of the last process or job waited for. RREESSTTRRIICCTTEEDD SSHHEELLLL If bbaasshh is started with the name rrbbaasshh, or the --rr option is supplied at - invocation, the shell becomes restricted. A restricted shell is used - to set up an environment more controlled than the standard shell. It - behaves identically to bbaasshh with the exception that the following are + invocation, the shell becomes restricted. A restricted shell is used + to set up an environment more controlled than the standard shell. It + behaves identically to bbaasshh with the exception that the following are disallowed or not performed: +o changing directories with ccdd @@ -5383,16 +5388,16 @@ RREESSTTRRIICCTTEEDD SSHHEELLLL +o specifying command names containing // - +o specifying a filename containing a // as an argument to the .. + +o specifying a filename containing a // as an argument to the .. builtin command - +o specifying a filename containing a slash as an argument to the + +o specifying a filename containing a slash as an argument to the --pp option to the hhaasshh builtin command - +o importing function definitions from the shell environment at + +o importing function definitions from the shell environment at startup - +o parsing the value of SSHHEELLLLOOPPTTSS from the shell environment at + +o parsing the value of SSHHEELLLLOOPPTTSS from the shell environment at startup +o redirecting output using the >, >|, <>, >&, &>, and >> redirect- @@ -5401,10 +5406,10 @@ RREESSTTRRIICCTTEEDD SSHHEELLLL +o using the eexxeecc builtin command to replace the shell with another command - +o adding or deleting builtin commands with the --ff and --dd options + +o adding or deleting builtin commands with the --ff and --dd options to the eennaabbllee builtin command - +o using the eennaabbllee builtin command to enable disabled shell + +o using the eennaabbllee builtin command to enable disabled shell builtins +o specifying the --pp option to the ccoommmmaanndd builtin command @@ -5414,14 +5419,14 @@ RREESSTTRRIICCTTEEDD SSHHEELLLL These restrictions are enforced after any startup files are read. When a command that is found to be a shell script is executed (see CCOOMM-- - MMAANNDD EEXXEECCUUTTIIOONN above), rrbbaasshh turns off any restrictions in the shell + MMAANNDD EEXXEECCUUTTIIOONN above), rrbbaasshh turns off any restrictions in the shell spawned to execute the script. SSEEEE AALLSSOO _B_a_s_h _R_e_f_e_r_e_n_c_e _M_a_n_u_a_l, Brian Fox and Chet Ramey _T_h_e _G_n_u _R_e_a_d_l_i_n_e _L_i_b_r_a_r_y, Brian Fox and Chet Ramey _T_h_e _G_n_u _H_i_s_t_o_r_y _L_i_b_r_a_r_y, Brian Fox and Chet Ramey - _P_o_r_t_a_b_l_e _O_p_e_r_a_t_i_n_g _S_y_s_t_e_m _I_n_t_e_r_f_a_c_e _(_P_O_S_I_X_) _P_a_r_t _2_: _S_h_e_l_l _a_n_d _U_t_i_l_i_- + _P_o_r_t_a_b_l_e _O_p_e_r_a_t_i_n_g _S_y_s_t_e_m _I_n_t_e_r_f_a_c_e _(_P_O_S_I_X_) _P_a_r_t _2_: _S_h_e_l_l _a_n_d _U_t_i_l_i_- _t_i_e_s, IEEE _s_h(1), _k_s_h(1), _c_s_h(1) _e_m_a_c_s(1), _v_i(1) @@ -5437,7 +5442,7 @@ FFIILLEESS _~_/_._b_a_s_h_r_c The individual per-interactive-shell startup file _~_/_._b_a_s_h___l_o_g_o_u_t - The individual login shell cleanup file, executed when a login + The individual login shell cleanup file, executed when a login shell exits _~_/_._i_n_p_u_t_r_c Individual _r_e_a_d_l_i_n_e initialization file @@ -5451,14 +5456,14 @@ AAUUTTHHOORRSS BBUUGG RREEPPOORRTTSS If you find a bug in bbaasshh,, you should report it. But first, you should - make sure that it really is a bug, and that it appears in the latest - version of bbaasshh. The latest version is always available from + make sure that it really is a bug, and that it appears in the latest + version of bbaasshh. The latest version is always available from _f_t_p_:_/_/_f_t_p_._g_n_u_._o_r_g_/_p_u_b_/_g_n_u_/_b_a_s_h_/. - Once you have determined that a bug actually exists, use the _b_a_s_h_b_u_g - command to submit a bug report. If you have a fix, you are encouraged - to mail that as well! Suggestions and `philosophical' bug reports may - be mailed to _b_u_g_-_b_a_s_h_@_g_n_u_._o_r_g or posted to the Usenet newsgroup + Once you have determined that a bug actually exists, use the _b_a_s_h_b_u_g + command to submit a bug report. If you have a fix, you are encouraged + to mail that as well! Suggestions and `philosophical' bug reports may + be mailed to _b_u_g_-_b_a_s_h_@_g_n_u_._o_r_g or posted to the Usenet newsgroup ggnnuu..bbaasshh..bbuugg. ALL bug reports should include: @@ -5469,7 +5474,7 @@ BBUUGG RREEPPOORRTTSS A description of the bug behaviour A short script or `recipe' which exercises the bug - _b_a_s_h_b_u_g inserts the first three items automatically into the template + _b_a_s_h_b_u_g inserts the first three items automatically into the template it provides for filing a bug report. Comments and bug reports concerning this manual page should be directed @@ -5486,10 +5491,10 @@ BBUUGGSS Shell builtin commands and functions are not stoppable/restartable. Compound commands and command sequences of the form `a ; b ; c' are not - handled gracefully when process suspension is attempted. When a - process is stopped, the shell immediately executes the next command in - the sequence. It suffices to place the sequence of commands between - parentheses to force it into a subshell, which may be stopped as a + handled gracefully when process suspension is attempted. When a + process is stopped, the shell immediately executes the next command in + the sequence. It suffices to place the sequence of commands between + parentheses to force it into a subshell, which may be stopped as a unit. Array variables may not (yet) be exported. diff --git a/doc/bash.html b/doc/bash.html index a3036c9c5..14069ba9c 100644 --- a/doc/bash.html +++ b/doc/bash.html @@ -4564,7 +4564,10 @@ This is semantically equivalent to

-(see Duplicating File Descriptors below). +When using the second form, word may not expand to a number or +-. If it does, other redirection operators apply +(see Duplicating File Descriptors below) for compatibility +reasons.  

Appending Standard Output and Standard Error

@@ -4749,8 +4752,18 @@ If the digits in word do not specify a file descriptor open for output, a redirection error occurs. +If +word + +evaluates to +-, + +file descriptor +n + +is closed. As a special case, if n is omitted, and word does not -expand to one or more digits, the standard output and standard +expand to one or more digits or -, the standard output and standard error are redirected as described previously.  

Moving File Descriptors

@@ -10831,9 +10844,12 @@ that script and return either or the exit status of the last command executed within the script as the exit status of the script. +If n is supplied, the return value is its least significant +8 bits. The return status is non-zero if return +is supplied a non-numeric argument, or is used outside a function and not during execution of a script by . or source. Any command associated with the RETURN trap is executed @@ -12938,6 +12954,6 @@ There may be only one active coprocess at a time.
This document was created by man2html from bash.1.
-Time: 26 September 2011 10:56:19 EDT +Time: 24 October 2011 08:43:51 EDT diff --git a/doc/bash.pdf b/doc/bash.pdf index 2690e14b3..4331fb9c1 100644 Binary files a/doc/bash.pdf and b/doc/bash.pdf differ diff --git a/doc/bash.ps b/doc/bash.ps index eb8fc6390..f8abc94fb 100644 --- a/doc/bash.ps +++ b/doc/bash.ps @@ -1,6 +1,6 @@ %!PS-Adobe-3.0 %%Creator: groff version 1.19.2 -%%CreationDate: Mon Sep 26 10:56:08 2011 +%%CreationDate: Mon Oct 24 08:43:45 2011 %%DocumentNeededResources: font Times-Roman %%+ font Times-Bold %%+ font Times-Italic @@ -3196,47 +3196,51 @@ F1(n)A F0(])A F2(>>)A F1(wor)A(d)-.37 E F2(Redir)87 244.8 Q F1(wor)A(d)-.37 E F0(Of the tw)108 343.2 Q 2.5(of)-.1 G (orms, the \214rst is preferred.)-2.5 E(This is semantically equi)5 E -.25(va)-.25 G(lent to).25 E F2(>)144 360 Q F1(wor)A(d)-.37 E F0(2)2.5 E -F2(>&)A F0(1)A(\(see)108 376.8 Q F2(Duplicating File Descriptors)2.5 E -F0(belo)2.5 E(w\).)-.25 E F2 -.25(Ap)87 393.6 S -(pending Standard Output and Standard Err).25 E(or)-.18 E F0 .249 -(This construct allo)108 405.6 R .249(ws both the standard output \(\ +F2(>&)A F0(1)A .115(When using the second form,)108 376.8 R F1(wor)2.614 +E(d)-.37 E F0 .114(may not e)2.614 F .114(xpand to a number or)-.15 F F2 +2.614 E F0 5.114(.I)C 2.614(fi)-5.114 G 2.614(td)-2.614 G .114 +(oes, other redirection operators)-2.614 F(apply \(see)108 388.8 Q F2 +(Duplicating File Descriptors)2.5 E F0(belo)2.5 E +(w\) for compatibility reasons.)-.25 E F2 -.25(Ap)87 405.6 S +(pending Standard Output and Standard Err).25 E(or)-.18 E F0 .248 +(This construct allo)108 417.6 R .249(ws both the standard output \(\ \214le descriptor 1\) and the standard error output \(\214le descrip-) -.25 F(tor 2\) to be appended to the \214le whose name is the e)108 -417.6 Q(xpansion of)-.15 E F1(wor)2.5 E(d)-.37 E F0(.).77 E +429.6 Q(xpansion of)-.15 E F1(wor)2.5 E(d)-.37 E F0(.).77 E (The format for appending standard output and standard error is:)108 -434.4 Q F2(&>>)144 451.2 Q F1(wor)A(d)-.37 E F0 -(This is semantically equi)108 468 Q -.25(va)-.25 G(lent to).25 E F2(>>) -144 484.8 Q F1(wor)A(d)-.37 E F0(2)2.5 E F2(>&)A F0(1)A(\(see)108 501.6 +446.4 Q F2(&>>)144 463.2 Q F1(wor)A(d)-.37 E F0 +(This is semantically equi)108 480 Q -.25(va)-.25 G(lent to).25 E F2(>>) +144 496.8 Q F1(wor)A(d)-.37 E F0(2)2.5 E F2(>&)A F0(1)A(\(see)108 513.6 Q F2(Duplicating File Descriptors)2.5 E F0(belo)2.5 E(w\).)-.25 E F2 -(Her)87 518.4 Q 2.5(eD)-.18 G(ocuments)-2.5 E F0 .33(This type of redir\ +(Her)87 530.4 Q 2.5(eD)-.18 G(ocuments)-2.5 E F0 .33(This type of redir\ ection instructs the shell to read input from the current source until \ -a line containing only)108 530.4 R F1(delimiter)108.35 542.4 Q F0 .615 -(\(with no trailing blanks\) is seen.)3.845 F .615 +a line containing only)108 542.4 R F1(delimiter)108.35 554.4 Q F0 .614 +(\(with no trailing blanks\) is seen.)3.844 F .615 (All of the lines read up to that point are then used as the stan-)5.615 -F(dard input for a command.)108 554.4 Q -(The format of here-documents is:)108 571.2 Q F2(<<)144 588 Q F0([)A F2 -A F0(])A F1(wor)A(d)-.37 E(her)164 600 Q(e-document)-.37 E -(delimiter)144 612 Q F0 .301(No parameter and v)108 628.8 R .302 +F(dard input for a command.)108 566.4 Q +(The format of here-documents is:)108 583.2 Q F2(<<)144 600 Q F0([)A F2 +A F0(])A F1(wor)A(d)-.37 E(her)164 612 Q(e-document)-.37 E +(delimiter)144 624 Q F0 .302(No parameter and v)108 640.8 R .302 (ariable e)-.25 F .302(xpansion, command substitution, arithmetic e)-.15 -F .302(xpansion, or pathname e)-.15 F(xpansion)-.15 E .226 -(is performed on)108 640.8 R F1(wor)2.726 E(d)-.37 E F0 5.226(.I).77 G -2.726(fa)-5.226 G .526 -.15(ny c)-2.726 H .226(haracters in).15 F F1 +F .301(xpansion, or pathname e)-.15 F(xpansion)-.15 E .225 +(is performed on)108 652.8 R F1(wor)2.725 E(d)-.37 E F0 5.225(.I).77 G +2.726(fa)-5.225 G .526 -.15(ny c)-2.726 H .226(haracters in).15 F F1 (wor)3.066 E(d)-.37 E F0 .226(are quoted, the)3.496 F F1(delimiter)3.076 -E F0 .225(is the result of quote remo)3.456 F -.25(va)-.15 G 2.725(lo) -.25 G(n)-2.725 E F1(wor)108 652.8 Q(d)-.37 E F0 2.714(,a).77 G .214 -(nd the lines in the here-document are not e)-2.714 F 2.714(xpanded. If) --.15 F F1(wor)2.715 E(d)-.37 E F0 .215 -(is unquoted, all lines of the here-docu-)2.715 F .673 -(ment are subjected to parameter e)108 664.8 R .673 +E F0 .226(is the result of quote remo)3.456 F -.25(va)-.15 G 2.726(lo) +.25 G(n)-2.726 E F1(wor)108 664.8 Q(d)-.37 E F0 2.715(,a).77 G .215 +(nd the lines in the here-document are not e)-2.715 F 2.714(xpanded. If) +-.15 F F1(wor)2.714 E(d)-.37 E F0 .214 +(is unquoted, all lines of the here-docu-)2.714 F .673 +(ment are subjected to parameter e)108 676.8 R .673 (xpansion, command substitution, and arithmetic e)-.15 F 3.173 -(xpansion. In)-.15 F .673(the latter)3.173 F -(case, the character sequence)108 676.8 Q F2(\\)2.5 E F0 +(xpansion. In)-.15 F .674(the latter)3.173 F +(case, the character sequence)108 688.8 Q F2(\\)2.5 E F0 (is ignored, and)2.5 E F2(\\)2.5 E F0 (must be used to quote the characters)2.5 E F2(\\)2.5 E F0(,)A F2($)2.5 -E F0 2.5(,a)C(nd)-2.5 E F2<92>2.5 E F0(.)A .601 -(If the redirection operator is)108 693.6 R F2(<<\255)3.101 E F0 3.101 +E F0 2.5(,a)C(nd)-2.5 E F2<92>2.5 E F0(.)A .602 +(If the redirection operator is)108 705.6 R F2(<<\255)3.101 E F0 3.101 (,t)C .601(hen all leading tab characters are stripped from input lines\ - and the line)-3.101 F(containing)108 705.6 Q F1(delimiter)2.5 E F0 5 + and the line)-3.101 F(containing)108 717.6 Q F1(delimiter)2.5 E F0 5 (.T).73 G(his allo)-5 E (ws here-documents within shell scripts to be indented in a natural f) -.25 E(ashion.)-.1 E(GNU Bash 4.2)72 768 Q(2011 September 25)135.955 E @@ -3249,340 +3253,343 @@ BP -.35 E/F1 10/Times-Bold@0 SF(Her)87 84 Q 2.5(eS)-.18 G(trings)-2.5 E F0 2.5(Av)108 96 S(ariant of here documents, the format is:)-2.75 E F1(<<<) 144 112.8 Q/F2 10/Times-Italic@0 SF(wor)A(d)-.37 E F0(The)108 129.6 Q F2 -(wor)2.894 E(d)-.37 E F0(under)2.894 E .394(goes brace e)-.18 F .393 -(xpansion, tilde e)-.15 F .393(xpansion, parameter and v)-.15 F .393 -(ariable e)-.25 F .393(xpansion, command substi-)-.15 F 1.384 +(wor)2.893 E(d)-.37 E F0(under)2.893 E .393(goes brace e)-.18 F .393 +(xpansion, tilde e)-.15 F .393(xpansion, parameter and v)-.15 F .394 +(ariable e)-.25 F .394(xpansion, command substi-)-.15 F 1.385 (tution, arithmetic e)108 141.6 R 1.384(xpansion, and quote remo)-.15 F -.25(va)-.15 G 3.884(l. P).25 F 1.384(athname e)-.15 F 1.384(xpansion w) -.15 F 1.384(ord splitting are not performed.)-.1 F(The result is suppl\ ied as a single string to the command on its standard input.)108 153.6 Q F1(Duplicating File Descriptors)87 170.4 Q F0(The redirection operator) 108 182.4 Q([)144 199.2 Q F2(n)A F0(])A F1(<&)A F2(wor)A(d)-.37 E F0 -.127(is used to duplicate input \214le descriptors.)108 216 R(If)5.127 E -F2(wor)2.967 E(d)-.37 E F0 -.15(ex)3.397 G .126 +.126(is used to duplicate input \214le descriptors.)108 216 R(If)5.127 E +F2(wor)2.967 E(d)-.37 E F0 -.15(ex)3.397 G .127 (pands to one or more digits, the \214le descriptor denoted).15 F(by)108 -228 Q F2(n)3.317 E F0 .457(is made to be a cop)3.197 F 2.957(yo)-.1 G -2.957(ft)-2.957 G .457(hat \214le descriptor)-2.957 F 5.457(.I)-.55 G -2.957(ft)-5.457 G .457(he digits in)-2.957 F F2(wor)3.298 E(d)-.37 E F0 -.458(do not specify a \214le descriptor open)3.728 F .15 -(for input, a redirection error occurs.)108 240 R(If)5.15 E F2(wor)2.99 -E(d)-.37 E F0 -.25(eva)3.42 G .15(luates to).25 F F12.65 E F0 2.649 -<2c8c>C .149(le descriptor)-2.649 F F2(n)3.009 E F0 .149(is closed.) -2.889 F(If)5.149 E F2(n)3.009 E F0 .149(is not speci\214ed,)2.889 F +228 Q F2(n)3.318 E F0 .458(is made to be a cop)3.198 F 2.958(yo)-.1 G +2.958(ft)-2.958 G .457(hat \214le descriptor)-2.958 F 5.457(.I)-.55 G +2.957(ft)-5.457 G .457(he digits in)-2.957 F F2(wor)3.297 E(d)-.37 E F0 +.457(do not specify a \214le descriptor open)3.727 F .149 +(for input, a redirection error occurs.)108 240 R(If)5.149 E F2(wor) +2.989 E(d)-.37 E F0 -.25(eva)3.419 G .149(luates to).25 F F12.649 E +F0 2.65<2c8c>C .15(le descriptor)-2.65 F F2(n)3.01 E F0 .15(is closed.) +2.89 F(If)5.15 E F2(n)3.01 E F0 .15(is not speci\214ed,)2.89 F (the standard input \(\214le descriptor 0\) is used.)108 252 Q (The operator)108 268.8 Q([)144 285.6 Q F2(n)A F0(])A F1(>&)A F2(wor)A -(d)-.37 E F0 .443 +(d)-.37 E F0 .444 (is used similarly to duplicate output \214le descriptors.)108 302.4 R -(If)5.443 E F2(n)3.304 E F0 .444 -(is not speci\214ed, the standard output \(\214le descrip-)3.184 F 1.358 -(tor 1\) is used.)108 314.4 R 1.358(If the digits in)6.358 F F2(wor) -4.198 E(d)-.37 E F0 1.357(do not specify a \214le descriptor open for o\ -utput, a redirection error)4.628 F 2.596(occurs. As)108 326.4 R 2.596 -(as)2.596 G .096(pecial case, if)-2.596 F F2(n)2.596 E F0 .096 -(is omitted, and)2.596 F F2(wor)2.596 E(d)-.37 E F0 .096(does not e) -2.596 F .096(xpand to one or more digits, the standard out-)-.15 F -(put and standard error are redirected as described pre)108 338.4 Q -(viously)-.25 E(.)-.65 E F1(Mo)87 355.2 Q(ving File Descriptors)-.1 E F0 -(The redirection operator)108 367.2 Q([)144 384 Q F2(n)A F0(])A F1(<&)A -F2(digit)A F1A F0(mo)108 400.8 Q -.15(ve)-.15 G 3.036(st).15 G .536 -(he \214le descriptor)-3.036 F F2(digit)3.036 E F0 .536 -(to \214le descriptor)3.036 F F2(n)3.036 E F0 3.036(,o).24 G 3.036(rt) --3.036 G .535(he standard input \(\214le descriptor 0\) if)-3.036 F F2 -(n)3.035 E F0 .535(is not speci-)3.035 F(\214ed.)108 412.8 Q F2(digit)5 -E F0(is closed after being duplicated to)2.5 E F2(n)2.5 E F0(.)A -(Similarly)108 429.6 Q 2.5(,t)-.65 G(he redirection operator)-2.5 E([) -144 446.4 Q F2(n)A F0(])A F1(>&)A F2(digit)A F1A F0(mo)108 463.2 Q --.15(ve)-.15 G 2.785(st).15 G .285(he \214le descriptor)-2.785 F F2 -(digit)2.785 E F0 .285(to \214le descriptor)2.785 F F2(n)2.785 E F0 -2.785(,o).24 G 2.785(rt)-2.785 G .286 -(he standard output \(\214le descriptor 1\) if)-2.785 F F2(n)2.786 E F0 -.286(is not speci-)2.786 F(\214ed.)108 475.2 Q F1 -(Opening File Descriptors f)87 492 Q(or Reading and Writing)-.25 E F0 -(The redirection operator)108 504 Q([)144 520.8 Q F2(n)A F0(])A F1(<>)A +(If)5.444 E F2(n)3.304 E F0 .443 +(is not speci\214ed, the standard output \(\214le descrip-)3.183 F 1.357 +(tor 1\) is used.)108 314.4 R 1.357(If the digits in)6.357 F F2(wor) +4.197 E(d)-.37 E F0 1.358(do not specify a \214le descriptor open for o\ +utput, a redirection error)4.627 F 2.754(occurs. If)108 326.4 R F2(wor) +3.094 E(d)-.37 E F0 -.25(eva)3.524 G .254(luates to).25 F F12.754 E +F0 2.754<2c8c>C .254(le descriptor)-2.754 F F2(n)3.114 E F0 .254 +(is closed.)2.994 F .254(As a special case, if)5.254 F F2(n)2.754 E F0 +.253(is omitted, and)2.754 F F2(wor)2.753 E(d)-.37 E F0(does)2.753 E +.965(not e)108 338.4 R .965(xpand to one or more digits or)-.15 F F1 +3.465 E F0 3.466(,t)C .966 +(he standard output and standard error are redirected as described) +-3.466 F(pre)108 350.4 Q(viously)-.25 E(.)-.65 E F1(Mo)87 367.2 Q +(ving File Descriptors)-.1 E F0(The redirection operator)108 379.2 Q([) +144 396 Q F2(n)A F0(])A F1(<&)A F2(digit)A F1A F0(mo)108 412.8 Q +-.15(ve)-.15 G 3.036(st).15 G .536(he \214le descriptor)-3.036 F F2 +(digit)3.036 E F0 .536(to \214le descriptor)3.036 F F2(n)3.036 E F0 +3.036(,o).24 G 3.036(rt)-3.036 G .535 +(he standard input \(\214le descriptor 0\) if)-3.036 F F2(n)3.035 E F0 +.535(is not speci-)3.035 F(\214ed.)108 424.8 Q F2(digit)5 E F0 +(is closed after being duplicated to)2.5 E F2(n)2.5 E F0(.)A(Similarly) +108 441.6 Q 2.5(,t)-.65 G(he redirection operator)-2.5 E([)144 458.4 Q +F2(n)A F0(])A F1(>&)A F2(digit)A F1A F0(mo)108 475.2 Q -.15(ve)-.15 +G 2.785(st).15 G .285(he \214le descriptor)-2.785 F F2(digit)2.785 E F0 +.285(to \214le descriptor)2.785 F F2(n)2.785 E F0 2.785(,o).24 G 2.785 +(rt)-2.785 G .286(he standard output \(\214le descriptor 1\) if)-2.785 F +F2(n)2.786 E F0 .286(is not speci-)2.786 F(\214ed.)108 487.2 Q F1 +(Opening File Descriptors f)87 504 Q(or Reading and Writing)-.25 E F0 +(The redirection operator)108 516 Q([)144 532.8 Q F2(n)A F0(])A F1(<>)A F2(wor)A(d)-.37 E F0 1.349(causes the \214le whose name is the e)108 -537.6 R 1.349(xpansion of)-.15 F F2(wor)4.189 E(d)-.37 E F0 1.349 +549.6 R 1.349(xpansion of)-.15 F F2(wor)4.189 E(d)-.37 E F0 1.349 (to be opened for both reading and writing on \214le)4.619 F(descriptor) -108 549.6 Q F2(n)2.5 E F0 2.5(,o).24 G 2.5(ro)-2.5 G 2.5<6e8c>-2.5 G +108 561.6 Q F2(n)2.5 E F0 2.5(,o).24 G 2.5(ro)-2.5 G 2.5<6e8c>-2.5 G (le descriptor 0 if)-2.5 E F2(n)2.86 E F0(is not speci\214ed.)2.74 E (If the \214le does not e)5 E(xist, it is created.)-.15 E/F3 10.95 -/Times-Bold@0 SF(ALIASES)72 566.4 Q F2(Aliases)108 578.4 Q F0(allo)3.173 +/Times-Bold@0 SF(ALIASES)72 578.4 Q F2(Aliases)108 590.4 Q F0(allo)3.173 E 3.173(was)-.25 G .674(tring to be substituted for a w)-3.173 F .674 (ord when it is used as the \214rst w)-.1 F .674 (ord of a simple command.)-.1 F .394(The shell maintains a list of alia\ -ses that may be set and unset with the)108 590.4 R F1(alias)2.893 E F0 +ses that may be set and unset with the)108 602.4 R F1(alias)2.893 E F0 (and)2.893 E F1(unalias)2.893 E F0 -.2(bu)2.893 G .393(iltin commands).2 -F(\(see)108 602.4 Q/F4 9/Times-Bold@0 SF 1.979(SHELL B)4.479 F(UIL)-.09 +F(\(see)108 614.4 Q/F4 9/Times-Bold@0 SF 1.979(SHELL B)4.479 F(UIL)-.09 E 1.979(TIN COMMANDS)-.828 F F0(belo)4.229 E 4.48(w\). The)-.25 F 1.98 (\214rst w)4.48 F 1.98(ord of each simple command, if unquoted, is)-.1 F -(check)108 614.4 Q .473(ed to see if it has an alias.)-.1 F .473 +(check)108 626.4 Q .473(ed to see if it has an alias.)-.1 F .473 (If so, that w)5.473 F .472(ord is replaced by the te)-.1 F .472 (xt of the alias.)-.15 F .472(The characters)5.472 F F1(/)2.972 E F0(,)A -F1($)2.972 E F0(,)A F1<92>2.972 E F0(,)A(and)108 626.4 Q F1(=)3.611 E F0 +F1($)2.972 E F0(,)A F1<92>2.972 E F0(,)A(and)108 638.4 Q F1(=)3.611 E F0 1.111(and an)3.611 F 3.611(yo)-.15 G 3.611(ft)-3.611 G 1.111(he shell) -3.611 F F2(metac)3.612 E(har)-.15 E(acter)-.15 E(s)-.1 E F0 1.112 (or quoting characters listed abo)3.612 F 1.412 -.15(ve m)-.15 H 1.112 -(ay not appear in an alias).15 F 3.62(name. The)108 638.4 R 1.12 +(ay not appear in an alias).15 F 3.62(name. The)108 650.4 R 1.12 (replacement te)3.62 F 1.119(xt may contain an)-.15 F 3.619(yv)-.15 G 1.119(alid shell input, including shell metacharacters.)-3.869 F 1.119 -(The \214rst)6.119 F -.1(wo)108 650.4 S .513(rd of the replacement te).1 +(The \214rst)6.119 F -.1(wo)108 662.4 S .513(rd of the replacement te).1 F .513(xt is tested for aliases, b)-.15 F .513(ut a w)-.2 F .514 (ord that is identical to an alias being e)-.1 F .514(xpanded is)-.15 F -.296(not e)108 662.4 R .296(xpanded a second time.)-.15 F .296 +.296(not e)108 674.4 R .296(xpanded a second time.)-.15 F .296 (This means that one may alias)5.296 F F1(ls)2.796 E F0(to)2.796 E F1 .296(ls \255F)2.796 F F0 2.796(,f)C .295(or instance, and)-2.796 F F1 -(bash)2.795 E F0 .295(does not try)2.795 F .542(to recursi)108 674.4 R +(bash)2.795 E F0 .295(does not try)2.795 F .542(to recursi)108 686.4 R -.15(ve)-.25 G .542(ly e).15 F .542(xpand the replacement te)-.15 F 3.042(xt. If)-.15 F .543(the last character of the alias v)3.042 F .543 (alue is a)-.25 F F2(blank)3.043 E F0 3.043(,t).67 G .543(hen the ne) --3.043 F(xt)-.15 E(command w)108 686.4 Q(ord follo)-.1 E +-3.043 F(xt)-.15 E(command w)108 698.4 Q(ord follo)-.1 E (wing the alias is also check)-.25 E(ed for alias e)-.1 E(xpansion.)-.15 -E(Aliases are created and listed with the)108 703.2 Q F1(alias)2.5 E F0 +E(Aliases are created and listed with the)108 715.2 Q F1(alias)2.5 E F0 (command, and remo)2.5 E -.15(ve)-.15 G 2.5(dw).15 G(ith the)-2.5 E F1 -(unalias)2.5 E F0(command.)2.5 E 1.777 -(There is no mechanism for using ar)108 720 R 1.777 -(guments in the replacement te)-.18 F 4.277(xt. If)-.15 F(ar)4.277 E -1.777(guments are needed, a shell)-.18 F(GNU Bash 4.2)72 768 Q +(unalias)2.5 E F0(command.)2.5 E(GNU Bash 4.2)72 768 Q (2011 September 25)135.955 E(26)185.115 E 0 Cg EP %%Page: 27 27 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E(function should be used \(see)108 84 Q/F1 9/Times-Bold@0 SF -(FUNCTIONS)2.5 E F0(belo)2.25 E(w\).)-.25 E 1.22(Aliases are not e)108 -100.8 R 1.22(xpanded when the shell is not interacti)-.15 F -.15(ve)-.25 -G 3.72(,u).15 G 1.22(nless the)-3.72 F/F2 10/Times-Bold@0 SF -(expand_aliases)3.72 E F0 1.22(shell option is set)3.72 F(using)108 -112.8 Q F2(shopt)2.5 E F0(\(see the description of)2.5 E F2(shopt)2.5 E -F0(under)2.5 E F1(SHELL B)2.5 E(UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo) -2.25 E(w\).)-.25 E .436 +-.35 E .284(There is no mechanism for using ar)108 84 R .284 +(guments in the replacement te)-.18 F 2.784(xt. If)-.15 F(ar)2.784 E +.284(guments are needed, a shell func-)-.18 F(tion should be used \(see) +108 96 Q/F1 9/Times-Bold@0 SF(FUNCTIONS)2.5 E F0(belo)2.25 E(w\).)-.25 E +1.22(Aliases are not e)108 112.8 R 1.22 +(xpanded when the shell is not interacti)-.15 F -.15(ve)-.25 G 3.72(,u) +.15 G 1.22(nless the)-3.72 F/F2 10/Times-Bold@0 SF(expand_aliases)3.72 E +F0 1.22(shell option is set)3.72 F(using)108 124.8 Q F2(shopt)2.5 E F0 +(\(see the description of)2.5 E F2(shopt)2.5 E F0(under)2.5 E F1 +(SHELL B)2.5 E(UIL)-.09 E(TIN COMMANDS)-.828 E F0(belo)2.25 E(w\).)-.25 +E .436 (The rules concerning the de\214nition and use of aliases are some)108 -129.6 R .435(what confusing.)-.25 F F2(Bash)5.435 E F0(al)2.935 E -.1 +141.6 R .435(what confusing.)-.25 F F2(Bash)5.435 E F0(al)2.935 E -.1 (wa)-.1 G .435(ys reads at least).1 F .337 -(one complete line of input before e)108 141.6 R -.15(xe)-.15 G .338 +(one complete line of input before e)108 153.6 R -.15(xe)-.15 G .338 (cuting an).15 F 2.838(yo)-.15 G 2.838(ft)-2.838 G .338 (he commands on that line.)-2.838 F .338(Aliases are e)5.338 F .338 -(xpanded when)-.15 F 3.404(ac)108 153.6 S .904 +(xpanded when)-.15 F 3.404(ac)108 165.6 S .904 (ommand is read, not when it is e)-3.404 F -.15(xe)-.15 G 3.404 (cuted. Therefore,).15 F .904 (an alias de\214nition appearing on the same line as)3.404 F 1.161 -(another command does not tak)108 165.6 R 3.662(ee)-.1 G -.25(ff)-3.662 +(another command does not tak)108 177.6 R 3.662(ee)-.1 G -.25(ff)-3.662 G 1.162(ect until the ne).25 F 1.162(xt line of input is read.)-.15 F 1.162(The commands follo)6.162 F 1.162(wing the)-.25 F .277 -(alias de\214nition on that line are not af)108 177.6 R .277 +(alias de\214nition on that line are not af)108 189.6 R .277 (fected by the ne)-.25 F 2.777(wa)-.25 G 2.777(lias. This)-2.777 F(beha) 2.777 E .277(vior is also an issue when functions)-.2 F .698(are e)108 -189.6 R -.15(xe)-.15 G 3.198(cuted. Aliases).15 F .698(are e)3.198 F +201.6 R -.15(xe)-.15 G 3.198(cuted. Aliases).15 F .698(are e)3.198 F .699(xpanded when a function de\214nition is read, not when the functio\ n is e)-.15 F -.15(xe)-.15 G(cuted,).15 E .495 -(because a function de\214nition is itself a compound command.)108 201.6 +(because a function de\214nition is itself a compound command.)108 213.6 R .494(As a consequence, aliases de\214ned in a func-)5.494 F .084 -(tion are not a)108 213.6 R -.25(va)-.2 G .084 +(tion are not a)108 225.6 R -.25(va)-.2 G .084 (ilable until after that function is e).25 F -.15(xe)-.15 G 2.584 (cuted. T).15 F 2.584(ob)-.8 G 2.584(es)-2.584 G .084(afe, al)-2.584 F -.1(wa)-.1 G .085(ys put alias de\214nitions on a sepa-).1 F -(rate line, and do not use)108 225.6 Q F2(alias)2.5 E F0 -(in compound commands.)2.5 E -.15(Fo)108 242.4 S 2.5(ra).15 G(lmost e) +(rate line, and do not use)108 237.6 Q F2(alias)2.5 E F0 +(in compound commands.)2.5 E -.15(Fo)108 254.4 S 2.5(ra).15 G(lmost e) -2.5 E -.15(ve)-.25 G (ry purpose, aliases are superseded by shell functions.).15 E/F3 10.95 -/Times-Bold@0 SF(FUNCTIONS)72 259.2 Q F0 3.468(As)108 271.2 S .968 +/Times-Bold@0 SF(FUNCTIONS)72 271.2 Q F0 3.468(As)108 283.2 S .968 (hell function, de\214ned as described abo)-3.468 F 1.267 -.15(ve u)-.15 H(nder).15 E F1 .967(SHELL GRAMMAR)3.467 F/F4 9/Times-Roman@0 SF(,)A F0 -.967(stores a series of commands for)3.217 F 1.001(later e)108 283.2 R +.967(stores a series of commands for)3.217 F 1.001(later e)108 295.2 R -.15(xe)-.15 G 3.501(cution. When).15 F 1.002(the name of a shell funct\ ion is used as a simple command name, the list of com-)3.501 F .316 -(mands associated with that function name is e)108 295.2 R -.15(xe)-.15 +(mands associated with that function name is e)108 307.2 R -.15(xe)-.15 G 2.816(cuted. Functions).15 F .316(are e)2.816 F -.15(xe)-.15 G .315 (cuted in the conte).15 F .315(xt of the current)-.15 F .035 -(shell; no ne)108 307.2 R 2.535(wp)-.25 G .036 +(shell; no ne)108 319.2 R 2.535(wp)-.25 G .036 (rocess is created to interpret them \(contrast this with the e)-2.535 F -.15(xe)-.15 G .036(cution of a shell script\).).15 F .036(When a)5.036 -F .64(function is e)108 319.2 R -.15(xe)-.15 G .64(cuted, the ar).15 F +F .64(function is e)108 331.2 R -.15(xe)-.15 G .64(cuted, the ar).15 F .639 (guments to the function become the positional parameters during its e) --.18 F -.15(xe)-.15 G(cution.).15 E .532(The special parameter)108 331.2 +-.18 F -.15(xe)-.15 G(cution.).15 E .532(The special parameter)108 343.2 R F2(#)3.032 E F0 .532(is updated to re\215ect the change.)3.032 F .532 (Special parameter)5.532 F F2(0)3.033 E F0 .533(is unchanged.)3.033 F -.533(The \214rst ele-)5.533 F(ment of the)108 343.2 Q F1(FUNCN)2.5 E +.533(The \214rst ele-)5.533 F(ment of the)108 355.2 Q F1(FUNCN)2.5 E (AME)-.18 E F0 -.25(va)2.25 G (riable is set to the name of the function while the function is e).25 E -.15(xe)-.15 G(cuting.).15 E 1.25(All other aspects of the shell e)108 -360 R -.15(xe)-.15 G 1.25(cution en).15 F 1.25 +372 R -.15(xe)-.15 G 1.25(cution en).15 F 1.25 (vironment are identical between a function and its caller with)-.4 F -1.048(these e)108 372 R 3.548(xceptions: the)-.15 F F1(DEB)3.548 E(UG) +1.048(these e)108 384 R 3.548(xceptions: the)-.15 F F1(DEB)3.548 E(UG) -.09 E F0(and)3.298 E F2(RETURN)3.548 E F0 1.048 (traps \(see the description of the)3.548 F F2(trap)3.548 E F0 -.2(bu) -3.548 G 1.048(iltin under).2 F F1(SHELL)3.549 E -.09(BU)108 384 S(IL).09 +3.548 G 1.048(iltin under).2 F F1(SHELL)3.549 E -.09(BU)108 396 S(IL).09 E .479(TIN COMMANDS)-.828 F F0(belo)2.729 E .479 (w\) are not inherited unless the function has been gi)-.25 F -.15(ve) -.25 G 2.978(nt).15 G(he)-2.978 E F2(trace)2.978 E F0(attrib)2.978 E -.478(ute \(see)-.2 F .42(the description of the)108 396 R F1(declar)2.92 +.478(ute \(see)-.2 F .42(the description of the)108 408 R F1(declar)2.92 E(e)-.162 E F0 -.2(bu)2.67 G .42(iltin belo).2 F .42(w\) or the)-.25 F F2 .42(\255o functrace)2.92 F F0 .42 (shell option has been enabled with the)2.92 F F2(set)2.921 E F0 -.2(bu) -108 408 S .072(iltin \(in which case all functions inherit the).2 F F2 +108 420 S .072(iltin \(in which case all functions inherit the).2 F F2 (DEB)2.572 E(UG)-.1 E F0(and)2.572 E F2(RETURN)2.572 E F0 .072 (traps\), and the)2.572 F F1(ERR)2.571 E F0 .071(trap is not inher)2.321 -F(-)-.2 E(ited unless the)108 420 Q F2(\255o errtrace)2.5 E F0 -(shell option has been enabled.)2.5 E -1.11(Va)108 436.8 S .655 +F(-)-.2 E(ited unless the)108 432 Q F2(\255o errtrace)2.5 E F0 +(shell option has been enabled.)2.5 E -1.11(Va)108 448.8 S .655 (riables local to the function may be declared with the)1.11 F F2(local) 3.155 E F0 -.2(bu)3.156 G .656(iltin command.).2 F(Ordinarily)5.656 E -3.156(,v)-.65 G .656(ariables and)-3.406 F(their v)108 448.8 Q +3.156(,v)-.65 G .656(ariables and)-3.406 F(their v)108 460.8 Q (alues are shared between the function and its caller)-.25 E(.)-.55 E -(The)108 465.6 Q F2(FUNCNEST)3.529 E F0 -.25(va)3.529 G 1.028 +(The)108 477.6 Q F2(FUNCNEST)3.529 E F0 -.25(va)3.529 G 1.028 (riable, if set to a numeric v).25 F 1.028 (alue greater than 0, de\214nes a maximum function nesting)-.25 F(le)108 -477.6 Q -.15(ve)-.25 G 2.5(l. Function).15 F(in)2.5 E -.2(vo)-.4 G +489.6 Q -.15(ve)-.25 G 2.5(l. Function).15 F(in)2.5 E -.2(vo)-.4 G (cations that e).2 E(xceed the limit cause the entire command to abort.) --.15 E .043(If the b)108 494.4 R .043(uiltin command)-.2 F F2 -.18(re) +-.15 E .043(If the b)108 506.4 R .043(uiltin command)-.2 F F2 -.18(re) 2.543 G(tur).18 E(n)-.15 E F0 .043(is e)2.543 F -.15(xe)-.15 G .043 (cuted in a function, the function completes and e).15 F -.15(xe)-.15 G -.044(cution resumes with).15 F 1.012(the ne)108 506.4 R 1.012 +.044(cution resumes with).15 F 1.012(the ne)108 518.4 R 1.012 (xt command after the function call.)-.15 F(An)6.011 E 3.511(yc)-.15 G 1.011(ommand associated with the)-3.511 F F2(RETURN)3.511 E F0 1.011 -(trap is e)3.511 F -.15(xe)-.15 G(cuted).15 E .213(before e)108 518.4 R +(trap is e)3.511 F -.15(xe)-.15 G(cuted).15 E .213(before e)108 530.4 R -.15(xe)-.15 G .213(cution resumes.).15 F .213 (When a function completes, the v)5.213 F .214 (alues of the positional parameters and the spe-)-.25 F(cial parameter) -108 530.4 Q F2(#)2.5 E F0(are restored to the v)2.5 E(alues the)-.25 E +108 542.4 Q F2(#)2.5 E F0(are restored to the v)2.5 E(alues the)-.25 E 2.5(yh)-.15 G(ad prior to the function')-2.5 E 2.5(se)-.55 G -.15(xe) -2.65 G(cution.).15 E 1.359 -(Function names and de\214nitions may be listed with the)108 547.2 R F2 +(Function names and de\214nitions may be listed with the)108 559.2 R F2 3.858 E F0 1.358(option to the)3.858 F F2(declar)3.858 E(e)-.18 E F0(or)3.858 E F2(typeset)3.858 E F0 -.2(bu)3.858 G 1.358(iltin com-).2 F -3.39(mands. The)108 559.2 R F23.39 E F0 .89(option to)3.39 F F2 +3.39(mands. The)108 571.2 R F23.39 E F0 .89(option to)3.39 F F2 (declar)3.39 E(e)-.18 E F0(or)3.39 E F2(typeset)3.39 E F0 .89 (will list the function names only \(and optionally the source)3.39 F -.327(\214le and line number)108 571.2 R 2.827(,i)-.4 G 2.827(ft)-2.827 G +.327(\214le and line number)108 583.2 R 2.827(,i)-.4 G 2.827(ft)-2.827 G (he)-2.827 E F2(extdeb)2.827 E(ug)-.2 E F0 .326 (shell option is enabled\).)2.827 F .326(Functions may be e)5.326 F .326 -(xported so that subshells)-.15 F 1.297(automatically ha)108 583.2 R +(xported so that subshells)-.15 F 1.297(automatically ha)108 595.2 R 1.597 -.15(ve t)-.2 H 1.297(hem de\214ned with the).15 F F23.797 E F0 1.297(option to the)3.797 F F2(export)3.798 E F0 -.2(bu)3.798 G 3.798 (iltin. A).2 F 1.298(function de\214nition may be)3.798 F .161 -(deleted using the)108 595.2 R F22.661 E F0 .161(option to the) +(deleted using the)108 607.2 R F22.661 E F0 .161(option to the) 2.661 F F2(unset)2.661 E F0 -.2(bu)2.661 G 2.661(iltin. Note).2 F .16 (that shell functions and v)2.661 F .16(ariables with the same name)-.25 F 1.325(may result in multiple identically-named entries in the en)108 -607.2 R 1.325(vironment passed to the shell')-.4 F 3.825(sc)-.55 G 3.825 -(hildren. Care)-3.825 F(should be tak)108 619.2 Q +619.2 R 1.325(vironment passed to the shell')-.4 F 3.825(sc)-.55 G 3.825 +(hildren. Care)-3.825 F(should be tak)108 631.2 Q (en in cases where this may cause a problem.)-.1 E .372 -(Functions may be recursi)108 636 R -.15(ve)-.25 G 5.371(.T).15 G(he) +(Functions may be recursi)108 648 R -.15(ve)-.25 G 5.371(.T).15 G(he) -5.371 E F2(FUNCNEST)2.871 E F0 -.25(va)2.871 G .371 (riable may be used to limit the depth of the function call).25 F 1.141 -(stack and restrict the number of function in)108 648 R -.2(vo)-.4 G +(stack and restrict the number of function in)108 660 R -.2(vo)-.4 G 3.641(cations. By).2 F(def)3.641 E 1.141 -(ault, no limit is imposed on the number of)-.1 F(recursi)108 660 Q .3 --.15(ve c)-.25 H(alls.).15 E F3(ARITHMETIC EV)72 676.8 Q(ALU)-1.478 E --1.04(AT)-.657 G(ION)1.04 E F0 2.298(The shell allo)108 688.8 R 2.297 +(ault, no limit is imposed on the number of)-.1 F(recursi)108 672 Q .3 +-.15(ve c)-.25 H(alls.).15 E F3(ARITHMETIC EV)72 688.8 Q(ALU)-1.478 E +-1.04(AT)-.657 G(ION)1.04 E F0 2.298(The shell allo)108 700.8 R 2.297 (ws arithmetic e)-.25 F 2.297(xpressions to be e)-.15 F -.25(va)-.25 G 2.297(luated, under certain circumstances \(see the).25 F F2(let)4.797 E -F0(and)4.797 E F2(declar)108 700.8 Q(e)-.18 E F0 -.2(bu)2.705 G .205 +F0(and)4.797 E F2(declar)108 712.8 Q(e)-.18 E F0 -.2(bu)2.705 G .205 (iltin commands and).2 F F2 .205(Arithmetic Expansion)2.705 F F0 2.705 (\). Ev)B .205(aluation is done in \214x)-.25 F .206(ed-width inte)-.15 -F .206(gers with no)-.15 F .429(check for o)108 712.8 R -.15(ve)-.15 G -(r\215o).15 E 1.729 -.65(w, t)-.25 H .429(hough di).65 F .428 -(vision by 0 is trapped and \215agged as an error)-.25 F 5.428(.T)-.55 G -.428(he operators and their prece-)-5.428 F 1.919(dence, associati)108 -724.8 R(vity)-.25 E 4.419(,a)-.65 G 1.919(nd v)-4.419 F 1.919 -(alues are the same as in the C language.)-.25 F 1.92(The follo)6.92 F -1.92(wing list of operators is)-.25 F(GNU Bash 4.2)72 768 Q +F .206(gers with no)-.15 F 2.07(check for o)108 724.8 R -.15(ve)-.15 G +(r\215o).15 E 3.37 -.65(w, t)-.25 H 2.07(hough di).65 F 2.07 +(vision by 0 is trapped and \215agged as an error)-.25 F 7.07(.T)-.55 G +2.07(he operators and their)-7.07 F(GNU Bash 4.2)72 768 Q (2011 September 25)135.955 E(27)185.115 E 0 Cg EP %%Page: 28 28 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E(grouped into le)108 84 Q -.15(ve)-.25 G +-.35 E .645(precedence, associati)108 84 R(vity)-.25 E 3.145(,a)-.65 G +.646(nd v)-3.145 F .646(alues are the same as in the C language.)-.25 F +.646(The follo)5.646 F .646(wing list of operators is)-.25 F +(grouped into le)108 96 Q -.15(ve)-.25 G (ls of equal-precedence operators.).15 E(The le)5 E -.15(ve)-.25 G (ls are listed in order of decreasing precedence.).15 E/F1 10 -/Times-Italic@0 SF(id)108 100.8 Q/F2 10/Times-Bold@0 SF(++)A F1(id)2.5 E -F2A F0 -.25(va)144 112.8 S -(riable post-increment and post-decrement).25 E F2(++)108 124.8 Q F1(id) -A F22.5 E F1(id)A F0 -.25(va)144 136.8 S -(riable pre-increment and pre-decrement).25 E F2 2.5108 148.8 S F0 -(unary minus and plus)19.6 E F2 2.5(!~)108 160.8 S F0 +/Times-Italic@0 SF(id)108 112.8 Q/F2 10/Times-Bold@0 SF(++)A F1(id)2.5 E +F2A F0 -.25(va)144 124.8 S +(riable post-increment and post-decrement).25 E F2(++)108 136.8 Q F1(id) +A F22.5 E F1(id)A F0 -.25(va)144 148.8 S +(riable pre-increment and pre-decrement).25 E F2 2.5108 160.8 S F0 +(unary minus and plus)19.6 E F2 2.5(!~)108 172.8 S F0 (logical and bitwise ne)24.34 E -.05(ga)-.15 G(tion).05 E F2(**)108 -172.8 Q F0 -.15(ex)26 G(ponentiation).15 E F2 2.5(*/%)108 184.8 S F0 +184.8 Q F0 -.15(ex)26 G(ponentiation).15 E F2 2.5(*/%)108 196.8 S F0 (multiplication, di)10.72 E(vision, remainder)-.25 E F2 2.5<2bad>108 -196.8 S F0(addition, subtraction)19.6 E F2(<< >>)108 208.8 Q F0 -(left and right bitwise shifts)10.7 E F2(<= >= < >)108 220.8 Q F0 -(comparison)144 232.8 Q F2(== !=)108 244.8 Q F0(equality and inequality) -13.07 E F2(&)108 256.8 Q F0(bitwise AND)27.67 E F2(^)108 268.8 Q F0 +208.8 S F0(addition, subtraction)19.6 E F2(<< >>)108 220.8 Q F0 +(left and right bitwise shifts)10.7 E F2(<= >= < >)108 232.8 Q F0 +(comparison)144 244.8 Q F2(== !=)108 256.8 Q F0(equality and inequality) +13.07 E F2(&)108 268.8 Q F0(bitwise AND)27.67 E F2(^)108 280.8 Q F0 (bitwise e)32.67 E(xclusi)-.15 E .3 -.15(ve O)-.25 H(R).15 E F2(|)108 -280.8 Q F0(bitwise OR)33.8 E F2(&&)108 292.8 Q F0(logical AND)19.34 E F2 -(||)108 304.8 Q F0(logical OR)31.6 E F1 -.2(ex)108 316.8 S(pr).2 E F2(?) +292.8 Q F0(bitwise OR)33.8 E F2(&&)108 304.8 Q F0(logical AND)19.34 E F2 +(||)108 316.8 Q F0(logical OR)31.6 E F1 -.2(ex)108 328.8 S(pr).2 E F2(?) A F1 -.2(ex)C(pr).2 E F2(:)A F1 -.2(ex)C(pr).2 E F0 -(conditional operator)144 328.8 Q F2 2.5(=*)108 340.8 S 2.5(=/)-2.5 G +(conditional operator)144 340.8 Q F2 2.5(=*)108 352.8 S 2.5(=/)-2.5 G 2.5(=%)-2.5 G 2.5(=+)-2.5 G 2.5<3dad>-2.5 G 2.5(=<)-2.5 G -(<= >>= &= ^= |=)-2.5 E F0(assignment)144 352.8 Q F1 -.2(ex)108 364.8 S -(pr1).2 E F2(,)2.5 E F1 -.2(ex)2.5 G(pr2).2 E F0(comma)144 376.8 Q .68 -(Shell v)108 393.6 R .68(ariables are allo)-.25 F .68 +(<= >>= &= ^= |=)-2.5 E F0(assignment)144 364.8 Q F1 -.2(ex)108 376.8 S +(pr1).2 E F2(,)2.5 E F1 -.2(ex)2.5 G(pr2).2 E F0(comma)144 388.8 Q .68 +(Shell v)108 405.6 R .68(ariables are allo)-.25 F .68 (wed as operands; parameter e)-.25 F .68 (xpansion is performed before the e)-.15 F .68(xpression is e)-.15 F --.25(va)-.25 G(lu-).25 E 3.507(ated. W)108 405.6 R 1.007(ithin an e)-.4 +-.25(va)-.25 G(lu-).25 E 3.507(ated. W)108 417.6 R 1.007(ithin an e)-.4 F 1.007(xpression, shell v)-.15 F 1.007 (ariables may also be referenced by name without using the parameter) --.25 F -.15(ex)108 417.6 S 1.041(pansion syntax.).15 F 3.541(As)6.041 G +-.25 F -.15(ex)108 429.6 S 1.041(pansion syntax.).15 F 3.541(As)6.041 G 1.041(hell v)-3.541 F 1.041(ariable that is null or unset e)-.25 F -.25 (va)-.25 G 1.04(luates to 0 when referenced by name without).25 F 1.466 -(using the parameter e)108 429.6 R 1.466(xpansion syntax.)-.15 F 1.467 +(using the parameter e)108 441.6 R 1.466(xpansion syntax.)-.15 F 1.467 (The v)6.466 F 1.467(alue of a v)-.25 F 1.467(ariable is e)-.25 F -.25 (va)-.25 G 1.467(luated as an arithmetic e).25 F(xpression)-.15 E 1.39 -(when it is referenced, or when a v)108 441.6 R 1.389 +(when it is referenced, or when a v)108 453.6 R 1.389 (ariable which has been gi)-.25 F -.15(ve)-.25 G 3.889(nt).15 G(he) -3.889 E F1(inte)3.889 E -.1(ge)-.4 G(r).1 E F0(attrib)3.889 E 1.389 (ute using)-.2 F F2(declar)3.889 E 3.889(e-)-.18 G(i)-3.889 E F0(is) -3.889 E .332(assigned a v)108 453.6 R 2.832(alue. A)-.25 F .332(null v) +3.889 E .332(assigned a v)108 465.6 R 2.832(alue. A)-.25 F .332(null v) 2.832 F .332(alue e)-.25 F -.25(va)-.25 G .332(luates to 0.).25 F 2.832 (As)5.332 G .332(hell v)-2.832 F .332(ariable need not ha)-.25 F .632 -.15(ve i)-.2 H(ts).15 E F1(inte)2.832 E -.1(ge)-.4 G(r).1 E F0(attrib) -2.832 E .333(ute turned on)-.2 F(to be used in an e)108 465.6 Q +2.832 E .333(ute turned on)-.2 F(to be used in an e)108 477.6 Q (xpression.)-.15 E 1.406 -(Constants with a leading 0 are interpreted as octal numbers.)108 482.4 +(Constants with a leading 0 are interpreted as octal numbers.)108 494.4 R 3.906(Al)6.406 G 1.406(eading 0x or 0X denotes he)-3.906 F(xadecimal.) --.15 E .112(Otherwise, numbers tak)108 494.4 R 2.612(et)-.1 G .112 +-.15 E .112(Otherwise, numbers tak)108 506.4 R 2.612(et)-.1 G .112 (he form [)-2.612 F F1(base#)A F0 .112(]n, where the optional)B F1(base) 2.612 E F0 .113(is a decimal number between 2 and 64)2.612 F .534 -(representing the arithmetic base, and)108 506.4 R F1(n)3.034 E F0 .534 +(representing the arithmetic base, and)108 518.4 R F1(n)3.034 E F0 .534 (is a number in that base.)3.034 F(If)5.533 E F1(base#)3.033 E F0 .533 (is omitted, then base 10 is used.)3.033 F .915 -(The digits greater than 9 are represented by the lo)108 518.4 R .916 +(The digits greater than 9 are represented by the lo)108 530.4 R .916 (wercase letters, the uppercase letters, @, and _, in that)-.25 F(order) -108 530.4 Q 5.671(.I)-.55 G(f)-5.671 E F1(base)3.171 E F0 .671 +108 542.4 Q 5.671(.I)-.55 G(f)-5.671 E F1(base)3.171 E F0 .671 (is less than or equal to 36, lo)3.171 F .67 (wercase and uppercase letters may be used interchangeably to)-.25 F -(represent numbers between 10 and 35.)108 542.4 Q .234(Operators are e) -108 559.2 R -.25(va)-.25 G .234(luated in order of precedence.).25 F +(represent numbers between 10 and 35.)108 554.4 Q .234(Operators are e) +108 571.2 R -.25(va)-.25 G .234(luated in order of precedence.).25 F (Sub-e)5.234 E .234(xpressions in parentheses are e)-.15 F -.25(va)-.25 -G .235(luated \214rst and may).25 F -.15(ove)108 571.2 S +G .235(luated \214rst and may).25 F -.15(ove)108 583.2 S (rride the precedence rules abo).15 E -.15(ve)-.15 G(.).15 E/F3 10.95 -/Times-Bold@0 SF(CONDITION)72 588 Q(AL EXPRESSIONS)-.219 E F0 .256 -(Conditional e)108 600 R .256(xpressions are used by the)-.15 F F2([[) +/Times-Bold@0 SF(CONDITION)72 600 Q(AL EXPRESSIONS)-.219 E F0 .256 +(Conditional e)108 612 R .256(xpressions are used by the)-.15 F F2([[) 2.755 E F0 .255(compound command and the)2.755 F F2(test)2.755 E F0(and) 2.755 E F2([)2.755 E F0 -.2(bu)2.755 G .255(iltin commands to test).2 F -.77(\214le attrib)108 612 R .77 +.77(\214le attrib)108 624 R .77 (utes and perform string and arithmetic comparisons.)-.2 F .77 (Expressions are formed from the follo)5.77 F(wing)-.25 E 1.041 -(unary or binary primaries.)108 624 R 1.041(If an)6.041 F(y)-.15 E F1 +(unary or binary primaries.)108 636 R 1.041(If an)6.041 F(y)-.15 E F1 (\214le)3.541 E F0(ar)3.541 E 1.04 (gument to one of the primaries is of the form)-.18 F F1(/de)3.54 E -(v/fd/n)-.15 E F0 3.54(,t)C 1.04(hen \214le)-3.54 F(descriptor)108 636 Q +(v/fd/n)-.15 E F0 3.54(,t)C 1.04(hen \214le)-3.54 F(descriptor)108 648 Q F1(n)3.788 E F0 1.289(is check)3.788 F 3.789(ed. If)-.1 F(the)3.789 E F1 (\214le)3.789 E F0(ar)3.789 E 1.289 (gument to one of the primaries is one of)-.18 F F1(/de)3.789 E(v/stdin) -.15 E F0(,)A F1(/de)3.789 E(v/stdout)-.15 E F0 3.789(,o)C(r)-3.789 E F1 -(/de)108 648 Q(v/stderr)-.15 E F0 2.5<2c8c>C +(/de)108 660 Q(v/stderr)-.15 E F0 2.5<2c8c>C (le descriptor 0, 1, or 2, respecti)-2.5 E -.15(ve)-.25 G(ly).15 E 2.5 (,i)-.65 G 2.5(sc)-2.5 G(heck)-2.5 E(ed.)-.1 E .722 (Unless otherwise speci\214ed, primaries that operate on \214les follo) -108 664.8 R 3.221(ws)-.25 G .721(ymbolic links and operate on the tar) --3.221 F(get)-.18 E(of the link, rather than the link itself.)108 676.8 -Q 1.095(When used with)108 694.8 R F2([[)3.595 E F0 3.595(,t)C(he)-3.595 +108 676.8 R 3.221(ws)-.25 G .721(ymbolic links and operate on the tar) +-3.221 F(get)-.18 E(of the link, rather than the link itself.)108 688.8 +Q 1.095(When used with)108 706.8 R F2([[)3.595 E F0 3.595(,t)C(he)-3.595 E F2(<)3.595 E F0(and)3.595 E F2(>)3.595 E F0 1.095(operators sort le) 3.595 F 1.095(xicographically using the current locale.)-.15 F(The)6.096 E F2(test)3.596 E F0(com-)3.596 E(mand sorts using ASCII ordering.)108 -706.8 Q(GNU Bash 4.2)72 768 Q(2011 September 25)135.955 E(28)185.115 E 0 +718.8 Q(GNU Bash 4.2)72 768 Q(2011 September 25)135.955 E(28)185.115 E 0 Cg EP %%Page: 29 29 %%BeginPageSetup @@ -7382,520 +7389,524 @@ A(ce)-.18 E F0 2.967(\)c)C .467(ommand, it causes the shell to)-2.967 F .088(stop e)144 208.8 R -.15(xe)-.15 G .087 (cuting that script and return either).15 F F2(n)2.947 E F0 .087 (or the e)2.827 F .087(xit status of the last command e)-.15 F -.15(xe) --.15 G .087(cuted within).15 F .621(the script as the e)144 220.8 R .621 -(xit status of the script.)-.15 F .622(The return status is non-zero if) -5.622 F F1 -.18(re)3.122 G(tur).18 E(n)-.15 E F0 .622(is used outside a) -3.122 F .87(function and not during e)144 232.8 R -.15(xe)-.15 G .869 -(cution of a script by).15 F F1(.)3.369 E F0(or)4.202 E F1(sour)3.369 E -(ce)-.18 E F0 5.869(.A)C 1.169 -.15(ny c)-5.869 H .869 -(ommand associated with the).15 F F1(RETURN)144 244.8 Q F0(trap is e)2.5 +-.15 G .087(cuted within).15 F .613(the script as the e)144 220.8 R .613 +(xit status of the script.)-.15 F(If)5.613 E F2(n)3.113 E F0 .613 +(is supplied, the return v)3.113 F .613 +(alue is its least signi\214cant 8)-.25 F 2.511(bits. The)144 232.8 R +.011(return status is non-zero if)2.511 F F1 -.18(re)2.511 G(tur).18 E +(n)-.15 E F0 .011(is supplied a non-numeric ar)2.511 F .01 +(gument, or is used outside)-.18 F 2.909(af)144 244.8 S .409 +(unction and not during e)-2.909 F -.15(xe)-.15 G .41 +(cution of a script by).15 F F1(.)2.91 E F0(or)3.743 E F1(sour)2.91 E +(ce)-.18 E F0 5.41(.A)C .71 -.15(ny c)-5.41 H .41 +(ommand associated with the).15 F F1(RETURN)144 256.8 Q F0(trap is e)2.5 E -.15(xe)-.15 G(cuted before e).15 E -.15(xe)-.15 G -(cution resumes after the function or script.).15 E F1(set)108 261.6 Q +(cution resumes after the function or script.).15 E F1(set)108 273.6 Q F0([)2.5 E F1(\255\255abefhkmnptuvxBCEHPT)A F0 2.5(][)C F1-2.5 E F2(option\255name)2.5 E F0 2.5(][)C F2(ar)-2.5 E(g)-.37 E F0(...])2.5 E -F1(set)108 273.6 Q F0([)2.5 E F1(+abefhkmnptuvxBCEHPT)A F0 2.5(][)C F1 +F1(set)108 285.6 Q F0([)2.5 E F1(+abefhkmnptuvxBCEHPT)A F0 2.5(][)C F1 (+o)-2.5 E F2(option\255name)2.5 E F0 2.5(][)C F2(ar)-2.5 E(g)-.37 E F0 -(...])2.5 E -.4(Wi)144 285.6 S .835(thout options, the name and v).4 F -.835(alue of each shell v)-.25 F .836 +(...])2.5 E -.4(Wi)144 297.6 S .836(thout options, the name and v).4 F +.835(alue of each shell v)-.25 F .835 (ariable are displayed in a format that can be)-.25 F .784 -(reused as input for setting or resetting the currently-set v)144 297.6 -R 3.284(ariables. Read-only)-.25 F -.25(va)3.284 G .783 -(riables cannot be).25 F 2.946(reset. In)144 309.6 R F2 .447(posix mode) -2.946 F F0 2.947(,o)C .447(nly shell v)-2.947 F .447 +(reused as input for setting or resetting the currently-set v)144 309.6 +R 3.284(ariables. Read-only)-.25 F -.25(va)3.284 G .784 +(riables cannot be).25 F 2.947(reset. In)144 321.6 R F2 .447(posix mode) +2.947 F F0 2.947(,o)C .447(nly shell v)-2.947 F .447 (ariables are listed.)-.25 F .447 -(The output is sorted according to the current)5.447 F 3.531 -(locale. When)144 321.6 R 1.031(options are speci\214ed, the)3.531 F -3.531(ys)-.15 G 1.031(et or unset shell attrib)-3.531 F 3.53(utes. An) --.2 F 3.53(ya)-.15 G -.18(rg)-3.53 G 1.03(uments remaining).18 F 1.623 -(after option processing are treated as v)144 333.6 R 1.624 +(The output is sorted according to the current)5.447 F 3.53 +(locale. When)144 333.6 R 1.031(options are speci\214ed, the)3.53 F +3.531(ys)-.15 G 1.031(et or unset shell attrib)-3.531 F 3.531(utes. An) +-.2 F 3.531(ya)-.15 G -.18(rg)-3.531 G 1.031(uments remaining).18 F +1.624(after option processing are treated as v)144 345.6 R 1.623 (alues for the positional parameters and are assigned, in)-.25 F(order) -144 345.6 Q 2.5(,t)-.4 G(o)-2.5 E F1($1)2.5 E F0(,)A F1($2)2.5 E F0(,)A +144 357.6 Q 2.5(,t)-.4 G(o)-2.5 E F1($1)2.5 E F0(,)A F1($2)2.5 E F0(,)A F1 2.5(... $)2.5 F F2(n)A F0 5(.O)C(ptions, if speci\214ed, ha)-5 E .3 --.15(ve t)-.2 H(he follo).15 E(wing meanings:)-.25 E F1144 357.6 Q -F0 .54(Automatically mark v)29.3 F .539 -(ariables and functions which are modi\214ed or created for e)-.25 F -.539(xport to)-.15 F(the en)184 369.6 Q -(vironment of subsequent commands.)-.4 E F1144 381.6 Q F0 .131 +-.15(ve t)-.2 H(he follo).15 E(wing meanings:)-.25 E F1144 369.6 Q +F0 .539(Automatically mark v)29.3 F .539 +(ariables and functions which are modi\214ed or created for e)-.25 F .54 +(xport to)-.15 F(the en)184 381.6 Q(vironment of subsequent commands.) +-.4 E F1144 393.6 Q F0 .132 (Report the status of terminated background jobs immediately)28.74 F -2.632(,r)-.65 G .132(ather than before the ne)-2.632 F(xt)-.15 E -(primary prompt.)184 393.6 Q(This is ef)5 E(fecti)-.25 E .3 -.15(ve o) --.25 H(nly when job control is enabled.).15 E F1144 405.6 Q F0 -.088(Exit immediately if a)29.86 F F2(pipeline)2.588 E F0 .087 -(\(which may consist of a single)2.588 F F2 .087(simple command)2.587 F -F0 .087(\), a)B F2(list)2.587 E F0 2.587(,o)C(r)-2.587 E(a)184 417.6 Q -F2 1.293(compound command)3.793 F F0(\(see)3.793 E/F3 9/Times-Bold@0 SF -1.293(SHELL GRAMMAR)3.793 F F0(abo)3.544 E -.15(ve)-.15 G 3.794(\), e) -.15 F 1.294(xits with a non-zero status.)-.15 F .08 -(The shell does not e)184 429.6 R .079(xit if the command that f)-.15 F -.079(ails is part of the command list immediately)-.1 F(follo)184 441.6 -Q 1.654(wing a)-.25 F F1(while)4.154 E F0(or)4.154 E F1(until)4.154 E F0 --.1(ke)4.154 G(yw)-.05 E 1.655(ord, part of the test follo)-.1 F 1.655 -(wing the)-.25 F F1(if)4.155 E F0(or)4.155 E F1(elif)4.155 E F0(reserv) -4.155 E(ed)-.15 E -.1(wo)184 453.6 S .582(rds, part of an).1 F 3.082(yc) --.15 G .582(ommand e)-3.082 F -.15(xe)-.15 G .581(cuted in a).15 F F1 -(&&)3.081 E F0(or)3.081 E F1(||)3.081 E F0 .581(list e)3.081 F .581 -(xcept the command follo)-.15 F(wing)-.25 E .917(the \214nal)184 465.6 R -F1(&&)3.417 E F0(or)3.417 E F1(||)3.417 E F0 3.417(,a)C 1.217 -.15(ny c) --3.417 H .918(ommand in a pipeline b).15 F .918 -(ut the last, or if the command')-.2 F 3.418(sr)-.55 G(eturn)-3.418 E --.25(va)184 477.6 S .661(lue is being in).25 F -.15(ve)-.4 G .661 -(rted with).15 F F1(!)3.161 E F0 5.661(.I)C 3.161(fac)-5.661 G .66 -(ompound command other than a subshell returns a)-3.161 F 1.112 -(non-zero status because a command f)184 489.6 R 1.112(ailed while)-.1 F -F13.612 E F0 -.1(wa)3.612 G 3.612(sb).1 G 1.113 -(eing ignored, the shell does)-3.612 F .178(not e)184 501.6 R 2.678 -(xit. A)-.15 F .178(trap on)2.678 F F1(ERR)2.678 E F0 2.678(,i)C 2.678 -(fs)-2.678 G .178(et, is e)-2.678 F -.15(xe)-.15 G .178 -(cuted before the shell e).15 F 2.677(xits. This)-.15 F .177 -(option applies to)2.677 F .617(the shell en)184 513.6 R .617 +2.632(,r)-.65 G .131(ather than before the ne)-2.632 F(xt)-.15 E +(primary prompt.)184 405.6 Q(This is ef)5 E(fecti)-.25 E .3 -.15(ve o) +-.25 H(nly when job control is enabled.).15 E F1144 417.6 Q F0 +.087(Exit immediately if a)29.86 F F2(pipeline)2.587 E F0 .087 +(\(which may consist of a single)2.587 F F2 .088(simple command)2.588 F +F0 .088(\), a)B F2(list)2.588 E F0 2.588(,o)C(r)-2.588 E(a)184 429.6 Q +F2 1.294(compound command)3.794 F F0(\(see)3.794 E/F3 9/Times-Bold@0 SF +1.294(SHELL GRAMMAR)3.794 F F0(abo)3.544 E -.15(ve)-.15 G 3.793(\), e) +.15 F 1.293(xits with a non-zero status.)-.15 F .079 +(The shell does not e)184 441.6 R .079(xit if the command that f)-.15 F +.08(ails is part of the command list immediately)-.1 F(follo)184 453.6 Q +1.655(wing a)-.25 F F1(while)4.155 E F0(or)4.155 E F1(until)4.155 E F0 +-.1(ke)4.155 G(yw)-.05 E 1.655(ord, part of the test follo)-.1 F 1.654 +(wing the)-.25 F F1(if)4.154 E F0(or)4.154 E F1(elif)4.154 E F0(reserv) +4.154 E(ed)-.15 E -.1(wo)184 465.6 S .581(rds, part of an).1 F 3.081(yc) +-.15 G .581(ommand e)-3.081 F -.15(xe)-.15 G .581(cuted in a).15 F F1 +(&&)3.081 E F0(or)3.081 E F1(||)3.081 E F0 .582(list e)3.082 F .582 +(xcept the command follo)-.15 F(wing)-.25 E .918(the \214nal)184 477.6 R +F1(&&)3.418 E F0(or)3.418 E F1(||)3.418 E F0 3.418(,a)C 1.218 -.15(ny c) +-3.418 H .918(ommand in a pipeline b).15 F .917 +(ut the last, or if the command')-.2 F 3.417(sr)-.55 G(eturn)-3.417 E +-.25(va)184 489.6 S .66(lue is being in).25 F -.15(ve)-.4 G .66 +(rted with).15 F F1(!)3.16 E F0 5.661(.I)C 3.161(fac)-5.661 G .661 +(ompound command other than a subshell returns a)-3.161 F 1.113 +(non-zero status because a command f)184 501.6 R 1.112(ailed while)-.1 F +F13.612 E F0 -.1(wa)3.612 G 3.612(sb).1 G 1.112 +(eing ignored, the shell does)-3.612 F .177(not e)184 513.6 R 2.677 +(xit. A)-.15 F .177(trap on)2.677 F F1(ERR)2.677 E F0 2.677(,i)C 2.678 +(fs)-2.677 G .178(et, is e)-2.678 F -.15(xe)-.15 G .178 +(cuted before the shell e).15 F 2.678(xits. This)-.15 F .178 +(option applies to)2.678 F .618(the shell en)184 525.6 R .617 (vironment and each subshell en)-.4 F .617(vironment separately \(see) --.4 F F3 .618(COMMAND EXE-)3.118 F .643(CUTION ENVIR)184 525.6 R(ONMENT) +-.4 F F3 .617(COMMAND EXE-)3.117 F .642(CUTION ENVIR)184 537.6 R(ONMENT) -.27 E F0(abo)2.893 E -.15(ve)-.15 G .643 (\), and may cause subshells to e).15 F .643(xit before e)-.15 F -.15 -(xe)-.15 G .642(cuting all).15 F(the commands in the subshell.)184 537.6 -Q F1144 549.6 Q F0(Disable pathname e)30.97 E(xpansion.)-.15 E F1 -144 561.6 Q F0 2.238(Remember the location of commands as the) -28.74 F 4.738(ya)-.15 G 2.239(re look)-4.738 F 2.239(ed up for e)-.1 F --.15(xe)-.15 G 4.739(cution. This).15 F(is)4.739 E(enabled by def)184 -573.6 Q(ault.)-.1 E F1144 585.6 Q F0 .514(All ar)28.74 F .514 +(xe)-.15 G .643(cuting all).15 F(the commands in the subshell.)184 549.6 +Q F1144 561.6 Q F0(Disable pathname e)30.97 E(xpansion.)-.15 E F1 +144 573.6 Q F0 2.239(Remember the location of commands as the) +28.74 F 4.738(ya)-.15 G 2.238(re look)-4.738 F 2.238(ed up for e)-.1 F +-.15(xe)-.15 G 4.738(cution. This).15 F(is)4.738 E(enabled by def)184 +585.6 Q(ault.)-.1 E F1144 597.6 Q F0 .513(All ar)28.74 F .514 (guments in the form of assignment statements are placed in the en)-.18 -F .513(vironment for a)-.4 F -(command, not just those that precede the command name.)184 597.6 Q F1 -144 609.6 Q F0 .148(Monitor mode.)25.97 F .148 -(Job control is enabled.)5.148 F .149(This option is on by def)5.148 F -.149(ault for interacti)-.1 F .449 -.15(ve s)-.25 H(hells).15 E .651 -(on systems that support it \(see)184 621.6 R F3 .651(JOB CONTR)3.151 F -(OL)-.27 E F0(abo)2.901 E -.15(ve)-.15 G 3.151(\). All).15 F .65 -(processes run in a separate)3.151 F .678(process group.)184 633.6 R -.679(When a background job completes, the shell prints a line containin\ -g its)5.678 F -.15(ex)184 645.6 S(it status.).15 E F1144 657.6 Q -F0 .653(Read commands b)28.74 F .653(ut do not e)-.2 F -.15(xe)-.15 G -.653(cute them.).15 F .652(This may be used to check a shell script for) -5.653 F(syntax errors.)184 669.6 Q(This is ignored by interacti)5 E .3 --.15(ve s)-.25 H(hells.).15 E F1144 681.6 Q F2(option\255name)2.5 -E F0(The)184 693.6 Q F2(option\255name)2.5 E F0(can be one of the follo) -2.5 E(wing:)-.25 E F1(allexport)184 705.6 Q F0(Same as)224 717.6 Q F1 -2.5 E F0(.)A(GNU Bash 4.2)72 768 Q(2011 September 25)135.955 E(62) +F .514(vironment for a)-.4 F +(command, not just those that precede the command name.)184 609.6 Q F1 +144 621.6 Q F0 .149(Monitor mode.)25.97 F .149 +(Job control is enabled.)5.149 F .148(This option is on by def)5.149 F +.148(ault for interacti)-.1 F .448 -.15(ve s)-.25 H(hells).15 E .65 +(on systems that support it \(see)184 633.6 R F3 .651(JOB CONTR)3.151 F +(OL)-.27 E F0(abo)2.901 E -.15(ve)-.15 G 3.151(\). All).15 F .651 +(processes run in a separate)3.151 F .679(process group.)184 645.6 R +.678(When a background job completes, the shell prints a line containin\ +g its)5.679 F -.15(ex)184 657.6 S(it status.).15 E F1144 669.6 Q +F0 .652(Read commands b)28.74 F .652(ut do not e)-.2 F -.15(xe)-.15 G +.652(cute them.).15 F .653(This may be used to check a shell script for) +5.652 F(syntax errors.)184 681.6 Q(This is ignored by interacti)5 E .3 +-.15(ve s)-.25 H(hells.).15 E F1144 693.6 Q F2(option\255name)2.5 +E F0(The)184 705.6 Q F2(option\255name)2.5 E F0(can be one of the follo) +2.5 E(wing:)-.25 E(GNU Bash 4.2)72 768 Q(2011 September 25)135.955 E(62) 185.115 E 0 Cg EP %%Page: 63 63 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E/F1 10/Times-Bold@0 SF(braceexpand)184 84 Q F0(Same as)224 96 Q F1 -2.5 E F0(.)A F1(emacs)184 108 Q F0 .089 +-.35 E/F1 10/Times-Bold@0 SF(allexport)184 84 Q F0(Same as)224 96 Q F1 +2.5 E F0(.)A F1(braceexpand)184 108 Q F0(Same as)224 120 Q F1 +2.5 E F0(.)A F1(emacs)184 132 Q F0 .089 (Use an emacs-style command line editing interf)13.9 F 2.589(ace. 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This)224 156 R(also af)2.5 E(fects the editing interf) -.25 E(ace used for)-.1 E F1 -.18(re)2.5 G(ad \255e).18 E F0(.)A F1(err) -184 144 Q(exit)-.18 E F0(Same as)11.31 E F12.5 E F0(.)A F1 -(errtrace)184 156 Q F0(Same as)5.03 E F12.5 E F0(.)A F1(functrace) -184 168 Q F0(Same as)224 180 Q F12.5 E F0(.)A F1(hashall)184 192 Q -F0(Same as)9.43 E F12.5 E F0(.)A F1(histexpand)184 204 Q F0 -(Same as)224 216 Q F12.5 E F0(.)A F1(history)184 228 Q F0 .586 +184 168 Q(exit)-.18 E F0(Same as)11.31 E F12.5 E F0(.)A F1 +(errtrace)184 180 Q F0(Same as)5.03 E F12.5 E F0(.)A F1(functrace) +184 192 Q F0(Same as)224 204 Q F12.5 E F0(.)A F1(hashall)184 216 Q +F0(Same as)9.43 E F12.5 E F0(.)A F1(histexpand)184 228 Q F0 +(Same as)224 240 Q F12.5 E F0(.)A F1(history)184 252 Q F0 .587 (Enable command history)10 F 3.087(,a)-.65 G 3.087(sd)-3.087 G .587 (escribed abo)-3.087 F .887 -.15(ve u)-.15 H(nder).15 E/F2 9 /Times-Bold@0 SF(HIST)3.087 E(OR)-.162 E(Y)-.315 E/F3 9/Times-Roman@0 SF -(.)A F0 .587(This option is)5.087 F(on by def)224 240 Q +(.)A F0 .587(This option is)5.087 F(on by def)224 264 Q (ault in interacti)-.1 E .3 -.15(ve s)-.25 H(hells.).15 E F1(ignor)184 -252 Q(eeof)-.18 E F0 1.657(The ef)224 264 R 1.657 +276 Q(eeof)-.18 E F0 1.656(The ef)224 288 R 1.656 (fect is as if the shell command)-.25 F/F4 10/Courier@0 SF(IGNOREEOF=10) -4.156 E F0 1.656(had been e)4.156 F -.15(xe)-.15 G(cuted).15 E(\(see)224 -276 Q F1(Shell V)2.5 E(ariables)-.92 E F0(abo)2.5 E -.15(ve)-.15 G(\).) -.15 E F1 -.1(ke)184 288 S(yw).1 E(ord)-.1 E F0(Same as)224 300 Q F1 -2.5 E F0(.)A F1(monitor)184 312 Q F0(Same as)5.56 E F12.5 E -F0(.)A F1(noclob)184 324 Q(ber)-.1 E F0(Same as)224 336 Q F12.5 E -F0(.)A F1(noexec)184 348 Q F0(Same as)11.12 E F12.5 E F0(.)A F1 -(noglob)184 360 Q F0(Same as)11.1 E F12.5 E F0(.)A F1(nolog)184 -372 Q F0(Currently ignored.)16.66 E F1(notify)184 384 Q F0(Same as)15 E -F12.5 E F0(.)A F1(nounset)184 396 Q F0(Same as)6.66 E F12.5 -E F0(.)A F1(onecmd)184 408 Q F0(Same as)6.67 E F12.5 E F0(.)A F1 -(ph)184 420 Q(ysical)-.15 E F0(Same as)5.14 E F12.5 E F0(.)A F1 -(pipefail)184 432 Q F0 1.029(If set, the return v)7.77 F 1.029 -(alue of a pipeline is the v)-.25 F 1.03 -(alue of the last \(rightmost\) com-)-.25 F 1.137(mand to e)224 444 R +4.157 E F0 1.657(had been e)4.157 F -.15(xe)-.15 G(cuted).15 E(\(see)224 +300 Q F1(Shell V)2.5 E(ariables)-.92 E F0(abo)2.5 E -.15(ve)-.15 G(\).) +.15 E F1 -.1(ke)184 312 S(yw).1 E(ord)-.1 E F0(Same as)224 324 Q F1 +2.5 E F0(.)A F1(monitor)184 336 Q F0(Same as)5.56 E F12.5 E +F0(.)A F1(noclob)184 348 Q(ber)-.1 E F0(Same as)224 360 Q F12.5 E +F0(.)A F1(noexec)184 372 Q F0(Same as)11.12 E F12.5 E F0(.)A F1 +(noglob)184 384 Q F0(Same as)11.1 E F12.5 E F0(.)A F1(nolog)184 +396 Q F0(Currently ignored.)16.66 E F1(notify)184 408 Q F0(Same as)15 E +F12.5 E F0(.)A F1(nounset)184 420 Q F0(Same as)6.66 E F12.5 +E F0(.)A F1(onecmd)184 432 Q F0(Same as)6.67 E F12.5 E F0(.)A F1 +(ph)184 444 Q(ysical)-.15 E F0(Same as)5.14 E F12.5 E F0(.)A F1 +(pipefail)184 456 Q F0 1.03(If set, the return v)7.77 F 1.029 +(alue of a pipeline is the v)-.25 F 1.029 +(alue of the last \(rightmost\) com-)-.25 F 1.136(mand to e)224 468 R 1.136 (xit with a non-zero status, or zero if all commands in the pipeline) --.15 F -.15(ex)224 456 S(it successfully).15 E 5(.T)-.65 G -(his option is disabled by def)-5 E(ault.)-.1 E F1(posix)184 468 Q F0 -2.09(Change the beha)17.77 F 2.091(vior of)-.2 F F1(bash)4.591 E F0 +-.15 F -.15(ex)224 480 S(it successfully).15 E 5(.T)-.65 G +(his option is disabled by def)-5 E(ault.)-.1 E F1(posix)184 492 Q F0 +2.091(Change the beha)17.77 F 2.091(vior of)-.2 F F1(bash)4.591 E F0 2.091(where the def)4.591 F 2.091(ault operation dif)-.1 F 2.091 -(fers from the)-.25 F(POSIX standard to match the standard \()224 480 Q -/F5 10/Times-Italic@0 SF(posix mode)A F0(\).)A F1(pri)184 492 Q(vileged) --.1 E F0(Same as)224 504 Q F12.5 E F0(.)A F1 -.1(ve)184 516 S -(rbose).1 E F0(Same as)7.33 E F12.5 E F0(.)A F1(vi)184 528 Q F0 -1.466(Use a vi-style command line editing interf)32.22 F 3.965 -(ace. 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In)4.341 F 1.072(this mode, the)3.572 F -F2($ENV)3.572 E F0(and)3.322 E F2($B)3.572 E(ASH_ENV)-.27 E F0 1.072 -(\214les are not pro-)3.322 F 1.501 -(cessed, shell functions are not inherited from the en)184 618 R 1.5 -(vironment, and the)-.4 F F2(SHELLOPTS)4 E F3(,)A F2 -.27(BA)184 630 S -(SHOPTS).27 E F3(,)A F2(CDP)2.774 E -.855(AT)-.666 G(H).855 E F3(,)A F0 -(and)2.774 E F2(GLOBIGNORE)3.024 E F0 -.25(va)2.774 G .524 -(riables, if the).25 F 3.025(ya)-.15 G .525(ppear in the en)-3.025 F -(vironment,)-.4 E .38(are ignored.)184 642 R .38 -(If the shell is started with the ef)5.38 F(fecti)-.25 E .679 -.15(ve u) --.25 H .379(ser \(group\) id not equal to the real).15 F .461 -(user \(group\) id, and the)184 654 R F12.961 E F0 .461 -(option is not supplied, these actions are tak)2.961 F .462 -(en and the ef)-.1 F(fec-)-.25 E(ti)184 666 Q .695 -.15(ve u)-.25 H .395 +(fers from the)-.25 F(POSIX standard to match the standard \()224 504 Q +/F5 10/Times-Italic@0 SF(posix mode)A F0(\).)A F1(pri)184 516 Q(vileged) +-.1 E F0(Same as)224 528 Q F12.5 E F0(.)A F1 -.1(ve)184 540 S +(rbose).1 E F0(Same as)7.33 E F12.5 E F0(.)A F1(vi)184 552 Q F0 +1.465(Use a vi-style command line editing interf)32.22 F 3.966 +(ace. This)-.1 F 1.466(also af)3.966 F 1.466(fects the editing)-.25 F +(interf)224 564 Q(ace used for)-.1 E F1 -.18(re)2.5 G(ad \255e).18 E F0 +(.)A F1(xtrace)184 576 Q F0(Same as)13.35 E F12.5 E F0(.)A(If)184 +594 Q F13.053 E F0 .553(is supplied with no)3.053 F F5 +(option\255name)3.053 E F0 3.053(,t)C .553(he v)-3.053 F .552 +(alues of the current options are printed.)-.25 F(If)5.552 E F1(+o)184 +606 Q F0 1.071(is supplied with no)3.571 F F5(option\255name)3.571 E F0 +3.571(,as)C 1.071(eries of)-3.571 F F1(set)3.572 E F0 1.072 +(commands to recreate the current)3.572 F +(option settings is displayed on the standard output.)184 618 Q F1 +144 630 Q F0 -.45(Tu)28.74 G 1.072(rn on).45 F F5(privile)4.822 E -.1 +(ge)-.4 G(d).1 E F0 3.572(mode. In)4.342 F 1.072(this mode, the)3.572 F +F2($ENV)3.572 E F0(and)3.322 E F2($B)3.572 E(ASH_ENV)-.27 E F0 1.071 +(\214les are not pro-)3.322 F 1.5 +(cessed, shell functions are not inherited from the en)184 642 R 1.501 +(vironment, and the)-.4 F F2(SHELLOPTS)4.001 E F3(,)A F2 -.27(BA)184 654 +S(SHOPTS).27 E F3(,)A F2(CDP)2.775 E -.855(AT)-.666 G(H).855 E F3(,)A F0 +(and)2.775 E F2(GLOBIGNORE)3.025 E F0 -.25(va)2.775 G .524 +(riables, if the).25 F 3.024(ya)-.15 G .524(ppear in the en)-3.024 F +(vironment,)-.4 E .379(are ignored.)184 666 R .379 +(If the shell is started with the ef)5.379 F(fecti)-.25 E .679 -.15 +(ve u)-.25 H .38(ser \(group\) id not equal to the real).15 F .462 +(user \(group\) id, and the)184 678 R F12.961 E F0 .461 +(option is not supplied, these actions are tak)2.961 F .461 +(en and the ef)-.1 F(fec-)-.25 E(ti)184 690 Q .694 -.15(ve u)-.25 H .394 (ser id is set to the real user id.).15 F .395(If the)5.395 F F1 -2.895 E F0 .394(option is supplied at startup, the ef)2.895 F(fecti)-.25 -E -.15(ve)-.25 G .386(user id is not reset.)184 678 R -.45(Tu)5.386 G -.386(rning this option of).45 F 2.886(fc)-.25 G .387(auses the ef)-2.886 -F(fecti)-.25 E .687 -.15(ve u)-.25 H .387(ser and group ids to be).15 F -(set to the real user and group ids.)184 690 Q F1144 702 Q F0 -(Exit after reading and e)30.97 E -.15(xe)-.15 G(cuting one command.).15 -E F1144 714 Q F0 -.35(Tr)28.74 G .044(eat unset v).35 F .044(aria\ -bles and parameters other than the special parameters "@" and "*" as an) --.25 F 2.12(error when performing parameter e)184 726 R 4.62 -(xpansion. If)-.15 F -.15(ex)4.62 G 2.12 -(pansion is attempted on an unset).15 F(GNU Bash 4.2)72 768 Q +2.895 E F0 .395(option is supplied at startup, the ef)2.895 F(fecti)-.25 +E -.15(ve)-.25 G .387(user id is not reset.)184 702 R -.45(Tu)5.387 G +.387(rning this option of).45 F 2.886(fc)-.25 G .386(auses the ef)-2.886 +F(fecti)-.25 E .686 -.15(ve u)-.25 H .386(ser and group ids to be).15 F +(set to the real user and group ids.)184 714 Q(GNU Bash 4.2)72 768 Q (2011 September 25)135.955 E(63)185.115 E 0 Cg EP %%Page: 64 64 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E -.25(va)184 84 S .203(riable or parameter).25 F 2.702(,t)-.4 G -.202(he shell prints an error message, and, if not interacti)-2.702 F --.15(ve)-.25 G 2.702(,e).15 G .202(xits with)-2.852 F 2.5(an)184 96 S -(on-zero status.)-2.5 E/F1 10/Times-Bold@0 SF144 108 Q F0 -(Print shell input lines as the)29.3 E 2.5(ya)-.15 G(re read.)-2.5 E F1 -144 120 Q F0 .315(After e)29.3 F .315(xpanding each)-.15 F/F2 10 -/Times-Italic@0 SF .315(simple command)2.815 F F0(,)A F1 -.25(fo)2.815 G -(r).25 E F0(command,)2.815 E F1(case)2.815 E F0(command,)2.815 E F1 -(select)2.815 E F0(command,)2.815 E 1.236(or arithmetic)184 132 R F1 --.25(fo)3.736 G(r).25 E F0 1.236(command, display the e)3.736 F 1.236 -(xpanded v)-.15 F 1.236(alue of)-.25 F/F3 9/Times-Bold@0 SF(PS4)3.736 E -/F4 9/Times-Roman@0 SF(,)A F0(follo)3.486 E 1.236(wed by the com-)-.25 F -(mand and its e)184 144 Q(xpanded ar)-.15 E(guments or associated w)-.18 -E(ord list.)-.1 E F1144 156 Q F0 2.578(The shell performs brace e) -27.63 F 2.578(xpansion \(see)-.15 F F1 2.578(Brace Expansion)5.078 F F0 -(abo)5.078 E -.15(ve)-.15 G 5.079(\). This).15 F 2.579(is on by)5.079 F -(def)184 168 Q(ault.)-.1 E F1144 180 Q F0 .214(If set,)27.08 F F1 -(bash)2.714 E F0 .214(does not o)2.714 F -.15(ve)-.15 G .214 -(rwrite an e).15 F .214(xisting \214le with the)-.15 F F1(>)2.714 E F0 -(,)A F1(>&)2.714 E F0 2.713(,a)C(nd)-2.713 E F1(<>)2.713 E F0 .213 -(redirection opera-)2.713 F 3.053(tors. This)184 192 R .553(may be o) -3.053 F -.15(ve)-.15 G .553 +-.35 E/F1 10/Times-Bold@0 SF144 84 Q F0(Exit after reading and e) +30.97 E -.15(xe)-.15 G(cuting one command.).15 E F1144 96 Q F0 +-.35(Tr)28.74 G .043(eat unset v).35 F .044(ariables and parameters oth\ +er than the special parameters "@" and "*" as an)-.25 F .183 +(error when performing parameter e)184 108 R 2.683(xpansion. If)-.15 F +-.15(ex)2.683 G .182(pansion is attempted on an unset v).15 F(ari-)-.25 +E .746(able or parameter)184 120 R 3.246(,t)-.4 G .746 +(he shell prints an error message, and, if not interacti)-3.246 F -.15 +(ve)-.25 G 3.246(,e).15 G .746(xits with a)-3.396 F(non-zero status.)184 +132 Q F1144 144 Q F0(Print shell input lines as the)29.3 E 2.5(ya) +-.15 G(re read.)-2.5 E F1144 156 Q F0 .315(After e)29.3 F .315 +(xpanding each)-.15 F/F2 10/Times-Italic@0 SF .315(simple command)2.815 +F F0(,)A F1 -.25(fo)2.815 G(r).25 E F0(command,)2.815 E F1(case)2.815 E +F0(command,)2.815 E F1(select)2.815 E F0(command,)2.815 E 1.235 +(or arithmetic)184 168 R F1 -.25(fo)3.736 G(r).25 E F0 1.236 +(command, display the e)3.736 F 1.236(xpanded v)-.15 F 1.236(alue of) +-.25 F/F3 9/Times-Bold@0 SF(PS4)3.736 E/F4 9/Times-Roman@0 SF(,)A F0 +(follo)3.486 E 1.236(wed by the com-)-.25 F(mand and its e)184 180 Q +(xpanded ar)-.15 E(guments or associated w)-.18 E(ord list.)-.1 E F1 +144 192 Q F0 2.579(The shell performs brace e)27.63 F 2.578 +(xpansion \(see)-.15 F F1 2.578(Brace Expansion)5.078 F F0(abo)5.078 E +-.15(ve)-.15 G 5.078(\). This).15 F 2.578(is on by)5.078 F(def)184 204 Q +(ault.)-.1 E F1144 216 Q F0 .213(If set,)27.08 F F1(bash)2.713 E +F0 .213(does not o)2.713 F -.15(ve)-.15 G .214(rwrite an e).15 F .214 +(xisting \214le with the)-.15 F F1(>)2.714 E F0(,)A F1(>&)2.714 E F0 +2.714(,a)C(nd)-2.714 E F1(<>)2.714 E F0 .214(redirection opera-)2.714 F +3.054(tors. This)184 228 R .553(may be o)3.053 F -.15(ve)-.15 G .553 (rridden when creating output \214les by using the redirection opera-) -.15 F(tor)184 204 Q F1(>|)2.5 E F0(instead of)2.5 E F1(>)2.5 E F0(.)A F1 -144 216 Q F0 .104(If set, an)27.63 F 2.604(yt)-.15 G .104(rap on) --2.604 F F1(ERR)2.604 E F0 .103 -(is inherited by shell functions, command substitutions, and com-)2.604 -F .838(mands e)184 228 R -.15(xe)-.15 G .838(cuted in a subshell en).15 -F 3.338(vironment. The)-.4 F F1(ERR)3.338 E F0 .839 -(trap is normally not inherited in)3.339 F(such cases.)184 240 Q F1 -144 252 Q F0(Enable)26.52 E F1(!)3.032 E F0 .532 -(style history substitution.)5.532 F .531(This option is on by def)5.532 -F .531(ault when the shell is inter)-.1 F(-)-.2 E(acti)184 264 Q -.15 -(ve)-.25 G(.).15 E F1144 276 Q F0 1.164 +.15 F(tor)184 240 Q F1(>|)2.5 E F0(instead of)2.5 E F1(>)2.5 E F0(.)A F1 +144 252 Q F0 .103(If set, an)27.63 F 2.603(yt)-.15 G .103(rap on) +-2.603 F F1(ERR)2.603 E F0 .104 +(is inherited by shell functions, command substitutions, and com-)2.603 +F .839(mands e)184 264 R -.15(xe)-.15 G .839(cuted in a subshell en).15 +F 3.339(vironment. The)-.4 F F1(ERR)3.338 E F0 .838 +(trap is normally not inherited in)3.338 F(such cases.)184 276 Q F1 +144 288 Q F0(Enable)26.52 E F1(!)3.031 E F0 .531 +(style history substitution.)5.531 F .531(This option is on by def)5.531 +F .532(ault when the shell is inter)-.1 F(-)-.2 E(acti)184 300 Q -.15 +(ve)-.25 G(.).15 E F1144 312 Q F0 1.165 (If set, the shell does not follo)28.19 F 3.664(ws)-.25 G 1.164 -(ymbolic links when e)-3.664 F -.15(xe)-.15 G 1.165 -(cuting commands such as).15 F F1(cd)3.665 E F0 2.822 -(that change the current w)184 288 R 2.822(orking directory)-.1 F 7.822 -(.I)-.65 G 5.322(tu)-7.822 G 2.822(ses the ph)-5.322 F 2.821 -(ysical directory structure)-.05 F 2.685(instead. By)184 300 R(def)2.685 +(ymbolic links when e)-3.664 F -.15(xe)-.15 G 1.164 +(cuting commands such as).15 F F1(cd)3.664 E F0 2.821 +(that change the current w)184 324 R 2.822(orking directory)-.1 F 7.822 +(.I)-.65 G 5.322(tu)-7.822 G 2.822(ses the ph)-5.322 F 2.822 +(ysical directory structure)-.05 F 2.686(instead. By)184 336 R(def)2.686 E(ault,)-.1 E F1(bash)2.686 E F0(follo)2.686 E .186 (ws the logical chain of directories when performing com-)-.25 F -(mands which change the current directory)184 312 Q(.)-.65 E F1144 -324 Q F0 .89(If set, an)27.63 F 3.39(yt)-.15 G .89(raps on)-3.39 F F1 +(mands which change the current directory)184 348 Q(.)-.65 E F1144 +360 Q F0 .89(If set, an)27.63 F 3.39(yt)-.15 G .89(raps on)-3.39 F F1 (DEB)3.39 E(UG)-.1 E F0(and)3.39 E F1(RETURN)3.39 E F0 .89 (are inherited by shell functions, command)3.39 F 1.932 -(substitutions, and commands e)184 336 R -.15(xe)-.15 G 1.932 +(substitutions, and commands e)184 372 R -.15(xe)-.15 G 1.932 (cuted in a subshell en).15 F 4.432(vironment. The)-.4 F F1(DEB)4.432 E -(UG)-.1 E F0(and)4.432 E F1(RETURN)184 348 Q F0 -(traps are normally not inherited in such cases.)2.5 E F1144 360 Q -F0 .401(If no ar)28.6 F .401(guments follo)-.18 F 2.901(wt)-.25 G .401 +(UG)-.1 E F0(and)4.432 E F1(RETURN)184 384 Q F0 +(traps are normally not inherited in such cases.)2.5 E F1144 396 Q +F0 .4(If no ar)28.6 F .401(guments follo)-.18 F 2.901(wt)-.25 G .401 (his option, then the positional parameters are unset.)-2.901 F -(Otherwise,)5.4 E(the positional parameters are set to the)184 372 Q F2 -(ar)2.5 E(g)-.37 E F0(s, e)A -.15(ve)-.25 G 2.5(ni).15 G 2.5(fs)-2.5 G +(Otherwise,)5.401 E(the positional parameters are set to the)184 408 Q +F2(ar)2.5 E(g)-.37 E F0(s, e)A -.15(ve)-.25 G 2.5(ni).15 G 2.5(fs)-2.5 G (ome of them be)-2.5 E(gin with a)-.15 E F12.5 E F0(.)A F1144 -384 Q F0 1.944(Signal the end of options, cause all remaining)34.3 F F2 -(ar)4.444 E(g)-.37 E F0 4.444(st)C 4.444(ob)-4.444 G 4.445(ea)-4.444 G -1.945(ssigned to the positional)-4.445 F 3.446(parameters. The)184 396 R -F13.446 E F0(and)3.446 E F13.446 E F0 .945 -(options are turned of)3.446 F 3.445(f. If)-.25 F .945(there are no) -3.445 F F2(ar)3.445 E(g)-.37 E F0 .945(s, the positional)B -(parameters remain unchanged.)184 408 Q .425(The options are of)144 -424.8 R 2.925(fb)-.25 G 2.925(yd)-2.925 G(ef)-2.925 E .425 +420 Q F0 1.945(Signal the end of options, cause all remaining)34.3 F F2 +(ar)4.444 E(g)-.37 E F0 4.444(st)C 4.444(ob)-4.444 G 4.444(ea)-4.444 G +1.944(ssigned to the positional)-4.444 F 3.445(parameters. The)184 432 R +F13.445 E F0(and)3.445 E F13.445 E F0 .945 +(options are turned of)3.445 F 3.445(f. If)-.25 F .946(there are no) +3.445 F F2(ar)3.446 E(g)-.37 E F0 .946(s, the positional)B +(parameters remain unchanged.)184 444 Q .425(The options are of)144 +460.8 R 2.925(fb)-.25 G 2.925(yd)-2.925 G(ef)-2.925 E .425 (ault unless otherwise noted.)-.1 F .425 -(Using + rather than \255 causes these options)5.425 F .178 -(to be turned of)144 436.8 R 2.678(f. The)-.25 F .178 +(Using + rather than \255 causes these options)5.425 F .177 +(to be turned of)144 472.8 R 2.677(f. The)-.25 F .178 (options can also be speci\214ed as ar)2.678 F .178(guments to an in) --.18 F -.2(vo)-.4 G .177(cation of the shell.).2 F(The)5.177 E .066 -(current set of options may be found in)144 448.8 R F1<24ad>2.566 E F0 +-.18 F -.2(vo)-.4 G .178(cation of the shell.).2 F(The)5.178 E .066 +(current set of options may be found in)144 484.8 R F1<24ad>2.566 E F0 5.066(.T)C .066(he return status is al)-5.066 F -.1(wa)-.1 G .066 -(ys true unless an in).1 F -.25(va)-.4 G .067(lid option).25 F -(is encountered.)144 460.8 Q F1(shift)108 477.6 Q F0([)2.5 E F2(n)A F0 -(])A .429(The positional parameters from)144 489.6 R F2(n)2.929 E F0 -.429(+1 ... are renamed to)B F1 .429($1 ....)2.929 F F0 -.15(Pa)5.428 G -.428(rameters represented by the num-).15 F(bers)144 501.6 Q F1($#)2.582 -E F0(do)2.582 E .082(wn to)-.25 F F1($#)2.582 E F0A F2(n)A F0 .082 -(+1 are unset.)B F2(n)5.442 E F0 .082(must be a non-ne)2.822 F -.05(ga) --.15 G(ti).05 E .383 -.15(ve n)-.25 H .083(umber less than or equal to) -.15 F F1($#)2.583 E F0 5.083(.I)C(f)-5.083 E F2(n)2.943 E F0 .06 -(is 0, no parameters are changed.)144 513.6 R(If)5.06 E F2(n)2.92 E F0 +(ys true unless an in).1 F -.25(va)-.4 G .066(lid option).25 F +(is encountered.)144 496.8 Q F1(shift)108 513.6 Q F0([)2.5 E F2(n)A F0 +(])A .428(The positional parameters from)144 525.6 R F2(n)2.928 E F0 +.429(+1 ... are renamed to)B F1 .429($1 ....)2.929 F F0 -.15(Pa)5.429 G +.429(rameters represented by the num-).15 F(bers)144 537.6 Q F1($#)2.583 +E F0(do)2.583 E .083(wn to)-.25 F F1($#)2.583 E F0A F2(n)A F0 .083 +(+1 are unset.)B F2(n)5.443 E F0 .083(must be a non-ne)2.823 F -.05(ga) +-.15 G(ti).05 E .382 -.15(ve n)-.25 H .082(umber less than or equal to) +.15 F F1($#)2.582 E F0 5.082(.I)C(f)-5.082 E F2(n)2.942 E F0 .06 +(is 0, no parameters are changed.)144 549.6 R(If)5.06 E F2(n)2.92 E F0 .06(is not gi)2.8 F -.15(ve)-.25 G .06(n, it is assumed to be 1.).15 F (If)5.06 E F2(n)2.92 E F0 .06(is greater than)2.8 F F1($#)2.56 E F0 2.56 -(,t)C(he)-2.56 E .143(positional parameters are not changed.)144 525.6 R -.144(The return status is greater than zero if)5.143 F F2(n)3.004 E F0 -.144(is greater than)2.884 F F1($#)2.644 E F0 -(or less than zero; otherwise 0.)144 537.6 Q F1(shopt)108 554.4 Q F0([) +(,t)C(he)-2.56 E .144(positional parameters are not changed.)144 561.6 R +.144(The return status is greater than zero if)5.144 F F2(n)3.003 E F0 +.143(is greater than)2.883 F F1($#)2.643 E F0 +(or less than zero; otherwise 0.)144 573.6 Q F1(shopt)108 590.4 Q F0([) 2.5 E F1(\255pqsu)A F0 2.5(][)C F1-2.5 E F0 2.5(][)C F2(optname) --2.5 E F0(...])2.5 E -.8(To)144 566.4 S .222(ggle the v).8 F .222 +-2.5 E F0(...])2.5 E -.8(To)144 602.4 S .222(ggle the v).8 F .222 (alues of v)-.25 F .222(ariables controlling optional shell beha)-.25 F (vior)-.2 E 5.222(.W)-.55 G .222(ith no options, or with the)-5.622 F F1 2.722 E F0 .721(option, a list of all settable options is display\ -ed, with an indication of whether or not each is set.)144 578.4 R(The) -144 590.4 Q F12.828 E F0 .327(option causes output to be displaye\ -d in a form that may be reused as input.)2.828 F .327(Other options) -5.327 F(ha)144 602.4 Q .3 -.15(ve t)-.2 H(he follo).15 E(wing meanings:) --.25 E F1144 614.4 Q F0(Enable \(set\) each)26.41 E F2(optname)2.5 -E F0(.)A F1144 626.4 Q F0(Disable \(unset\) each)24.74 E F2 -(optname)2.5 E F0(.)A F1144 638.4 Q F0 .003(Suppresses normal out\ +ed, with an indication of whether or not each is set.)144 614.4 R(The) +144 626.4 Q F12.827 E F0 .327(option causes output to be displaye\ +d in a form that may be reused as input.)2.827 F .328(Other options) +5.328 F(ha)144 638.4 Q .3 -.15(ve t)-.2 H(he follo).15 E(wing meanings:) +-.25 E F1144 650.4 Q F0(Enable \(set\) each)26.41 E F2(optname)2.5 +E F0(.)A F1144 662.4 Q F0(Disable \(unset\) each)24.74 E F2 +(optname)2.5 E F0(.)A F1144 674.4 Q F0 .003(Suppresses normal out\ put \(quiet mode\); the return status indicates whether the)24.74 F F2 -(optname)2.504 E F0(is)2.504 E .256(set or unset.)180 650.4 R .256 -(If multiple)5.256 F F2(optname)2.756 E F0(ar)2.756 E .256 +(optname)2.503 E F0(is)2.503 E .255(set or unset.)180 686.4 R .255 +(If multiple)5.255 F F2(optname)2.755 E F0(ar)2.755 E .256 (guments are gi)-.18 F -.15(ve)-.25 G 2.756(nw).15 G(ith)-2.756 E F1 -2.756 E F0 2.755(,t)C .255(he return status is zero if)-2.755 F -(all)180 662.4 Q F2(optnames)2.5 E F0(are enabled; non-zero otherwise.) -2.5 E F1144 674.4 Q F0(Restricts the v)25.3 E(alues of)-.25 E F2 +2.756 E F0 2.756(,t)C .256(he return status is zero if)-2.756 F +(all)180 698.4 Q F2(optnames)2.5 E F0(are enabled; non-zero otherwise.) +2.5 E F1144 710.4 Q F0(Restricts the v)25.3 E(alues of)-.25 E F2 (optname)2.5 E F0(to be those de\214ned for the)2.5 E F12.5 E F0 -(option to the)2.5 E F1(set)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E .624 -(If either)144 691.2 R F13.124 E F0(or)3.124 E F13.124 E F0 +(option to the)2.5 E F1(set)2.5 E F0 -.2(bu)2.5 G(iltin.).2 E .625 +(If either)144 727.2 R F13.125 E F0(or)3.124 E F13.124 E F0 .624(is used with no)3.124 F F2(optname)3.124 E F0(ar)3.124 E(guments,) -.18 E F1(shopt)3.124 E F0(sho)3.124 E .624 -(ws only those options which are)-.25 F 2.234(set or unset, respecti)144 -703.2 R -.15(ve)-.25 G(ly).15 E 7.234(.U)-.65 G 2.234 -(nless otherwise noted, the)-7.234 F F1(shopt)4.734 E F0 2.234 -(options are disabled \(unset\) by)4.734 F(def)144 715.2 Q(ault.)-.1 E -(GNU Bash 4.2)72 768 Q(2011 September 25)135.955 E(64)185.115 E 0 Cg EP +(ws only those options which are)-.25 F(GNU Bash 4.2)72 768 Q +(2011 September 25)135.955 E(64)185.115 E 0 Cg EP %%Page: 65 65 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E 1.544(The return status when listing options is zero if all)144 -84 R/F1 10/Times-Italic@0 SF(optnames)4.044 E F0 1.545 -(are enabled, non-zero otherwise.)4.045 F .696 +-.35 E 2.233(set or unset, respecti)144 84 R -.15(ve)-.25 G(ly).15 E +7.234(.U)-.65 G 2.234(nless otherwise noted, the)-7.234 F/F1 10 +/Times-Bold@0 SF(shopt)4.734 E F0 2.234 +(options are disabled \(unset\) by)4.734 F(def)144 96 Q(ault.)-.1 E +1.544(The return status when listing options is zero if all)144 112.8 R +/F2 10/Times-Italic@0 SF(optnames)4.044 E F0 1.544 +(are enabled, non-zero otherwise.)4.044 F .696 (When setting or unsetting options, the return status is zero unless an) -144 96 R F1(optname)3.196 E F0 .696(is not a v)3.196 F .695(alid shell) --.25 F(option.)144 108 Q(The list of)144 124.8 Q/F2 10/Times-Bold@0 SF -(shopt)2.5 E F0(options is:)2.5 E F2(autocd)144 142.8 Q F0 .199 +144 124.8 R F2(optname)3.196 E F0 .696(is not a v)3.196 F .696 +(alid shell)-.25 F(option.)144 136.8 Q(The list of)144 153.6 Q F1(shopt) +2.5 E F0(options is:)2.5 E F1(autocd)144 171.6 Q F0 .2 (If set, a command name that is the name of a directory is e)11.11 F --.15(xe)-.15 G .2(cuted as if it were the ar).15 F(gu-)-.18 E -(ment to the)184 154.8 Q F2(cd)2.5 E F0 2.5(command. This)2.5 F +-.15(xe)-.15 G .199(cuted as if it were the ar).15 F(gu-)-.18 E +(ment to the)184 183.6 Q F1(cd)2.5 E F0 2.5(command. This)2.5 F (option is only used by interacti)2.5 E .3 -.15(ve s)-.25 H(hells.).15 E -F2(cdable_v)144 166.8 Q(ars)-.1 E F0 .156(If set, an ar)184 178.8 R .156 -(gument to the)-.18 F F2(cd)2.656 E F0 -.2(bu)2.656 G .155 +F1(cdable_v)144 195.6 Q(ars)-.1 E F0 .155(If set, an ar)184 207.6 R .155 +(gument to the)-.18 F F1(cd)2.655 E F0 -.2(bu)2.655 G .156 (iltin command that is not a directory is assumed to be the).2 F -(name of a v)184 190.8 Q(ariable whose v)-.25 E -(alue is the directory to change to.)-.25 E F2(cdspell)144 202.8 Q F0 +(name of a v)184 219.6 Q(ariable whose v)-.25 E +(alue is the directory to change to.)-.25 E F1(cdspell)144 231.6 Q F0 1.055 (If set, minor errors in the spelling of a directory component in a) -10.55 F F2(cd)3.555 E F0 1.055(command will be)3.555 F 3.988 -(corrected. The)184 214.8 R 1.488(errors check)3.988 F 1.487 -(ed for are transposed characters, a missing character)-.1 F 3.987(,a) --.4 G(nd)-3.987 E .77(one character too man)184 226.8 R 4.57 -.65(y. I) +10.55 F F1(cd)3.555 E F0 1.055(command will be)3.555 F 3.987 +(corrected. The)184 243.6 R 1.487(errors check)3.987 F 1.487 +(ed for are transposed characters, a missing character)-.1 F 3.988(,a) +-.4 G(nd)-3.988 E .77(one character too man)184 255.6 R 4.57 -.65(y. I) -.15 H 3.27(fac).65 G .77 (orrection is found, the corrected \214lename is printed, and)-3.27 F -(the command proceeds.)184 238.8 Q +(the command proceeds.)184 267.6 Q (This option is only used by interacti)5 E .3 -.15(ve s)-.25 H(hells.) -.15 E F2(checkhash)144 250.8 Q F0 2.08(If set,)184 262.8 R F2(bash)4.58 -E F0 2.079(checks that a command found in the hash table e)4.58 F 2.079 -(xists before trying to)-.15 F -.15(exe)184 274.8 S(cute it.).15 E +.15 E F1(checkhash)144 279.6 Q F0 2.079(If set,)184 291.6 R F1(bash) +4.579 E F0 2.079(checks that a command found in the hash table e)4.579 F +2.08(xists before trying to)-.15 F -.15(exe)184 303.6 S(cute it.).15 E (If a hashed command no longer e)5 E -(xists, a normal path search is performed.)-.15 E F2(checkjobs)144 286.8 -Q F0 .448(If set,)184 298.8 R F2(bash)2.948 E F0 .448 -(lists the status of an)2.948 F 2.949(ys)-.15 G .449 -(topped and running jobs before e)-2.949 F .449(xiting an interacti)-.15 -F -.15(ve)-.25 G 3.439(shell. If)184 310.8 R(an)3.439 E 3.439(yj)-.15 G -.938(obs are running, this causes the e)-3.439 F .938 -(xit to be deferred until a second e)-.15 F .938(xit is)-.15 F 2.203 -(attempted without an interv)184 322.8 R 2.203(ening command \(see)-.15 +(xists, a normal path search is performed.)-.15 E F1(checkjobs)144 315.6 +Q F0 .449(If set,)184 327.6 R F1(bash)2.949 E F0 .449 +(lists the status of an)2.949 F 2.949(ys)-.15 G .448 +(topped and running jobs before e)-2.949 F .448(xiting an interacti)-.15 +F -.15(ve)-.25 G 3.438(shell. If)184 339.6 R(an)3.438 E 3.438(yj)-.15 G +.938(obs are running, this causes the e)-3.438 F .938 +(xit to be deferred until a second e)-.15 F .939(xit is)-.15 F 2.203 +(attempted without an interv)184 351.6 R 2.203(ening command \(see)-.15 F/F3 9/Times-Bold@0 SF 2.203(JOB CONTR)4.703 F(OL)-.27 E F0(abo)4.453 E --.15(ve)-.15 G 4.703(\). The).15 F(shell)4.704 E(al)184 334.8 Q -.1(wa) +-.15(ve)-.15 G 4.703(\). The).15 F(shell)4.703 E(al)184 363.6 Q -.1(wa) -.1 G(ys postpones e).1 E(xiting if an)-.15 E 2.5(yj)-.15 G -(obs are stopped.)-2.5 E F2(checkwinsize)144 346.8 Q F0 .797(If set,)184 -358.8 R F2(bash)3.297 E F0 .797(checks the windo)3.297 F 3.297(ws)-.25 G -.796(ize after each command and, if necessary)-3.297 F 3.296(,u)-.65 G -.796(pdates the)-3.296 F -.25(va)184 370.8 S(lues of).25 E F3(LINES)2.5 -E F0(and)2.25 E F3(COLUMNS)2.5 E/F4 9/Times-Roman@0 SF(.)A F2(cmdhist) -144 382.8 Q F0 1.202(If set,)6.11 F F2(bash)3.702 E F0 1.202 +(obs are stopped.)-2.5 E F1(checkwinsize)144 375.6 Q F0 .796(If set,)184 +387.6 R F1(bash)3.296 E F0 .796(checks the windo)3.296 F 3.296(ws)-.25 G +.797(ize after each command and, if necessary)-3.296 F 3.297(,u)-.65 G +.797(pdates the)-3.297 F -.25(va)184 399.6 S(lues of).25 E F3(LINES)2.5 +E F0(and)2.25 E F3(COLUMNS)2.5 E/F4 9/Times-Roman@0 SF(.)A F1(cmdhist) +144 411.6 Q F0 1.202(If set,)6.11 F F1(bash)3.702 E F0 1.202 (attempts to sa)3.702 F 1.502 -.15(ve a)-.2 H 1.202 (ll lines of a multiple-line command in the same history).15 F(entry)184 -394.8 Q 5(.T)-.65 G(his allo)-5 E -(ws easy re-editing of multi-line commands.)-.25 E F2(compat31)144 406.8 -Q F0 .42(If set,)184 418.8 R F2(bash)2.92 E F0 .42(changes its beha)2.92 -F .419(vior to that of v)-.2 F .419 +423.6 Q 5(.T)-.65 G(his allo)-5 E +(ws easy re-editing of multi-line commands.)-.25 E F1(compat31)144 435.6 +Q F0 .419(If set,)184 447.6 R F1(bash)2.919 E F0 .419(changes its beha) +2.919 F .419(vior to that of v)-.2 F .42 (ersion 3.1 with respect to quoted ar)-.15 F(guments)-.18 E(to the)184 -430.8 Q F2([[)2.5 E F0(conditional command')2.5 E(s)-.55 E F2(=~)2.5 E -F0(operator)2.5 E(.)-.55 E F2(compat32)144 442.8 Q F0 1.409(If set,)184 -454.8 R F2(bash)3.909 E F0 1.409(changes its beha)3.909 F 1.409 -(vior to that of v)-.2 F 1.41 -(ersion 3.2 with respect to locale-speci\214c)-.15 F 1.266 -(string comparison when using the)184 466.8 R F2([[)3.766 E F0 1.266 -(conditional command')3.766 F(s)-.55 E F2(<)3.766 E F0(and)3.766 E F2(>) -3.766 E F0 3.765(operators. Bash)3.765 F -.15(ve)184 478.8 S .512 -(rsions prior to bash-4.1 use ASCII collation and).15 F F1(str)3.012 E -(cmp)-.37 E F0 .513(\(3\); bash-4.1 and later use the).19 F -(current locale')184 490.8 Q 2.5(sc)-.55 G(ollation sequence and)-2.5 E -F1(str)2.5 E(coll)-.37 E F0(\(3\).).51 E F2(compat40)144 502.8 Q F0 1.41 -(If set,)184 514.8 R F2(bash)3.91 E F0 1.41(changes its beha)3.91 F -1.409(vior to that of v)-.2 F 1.409 -(ersion 4.0 with respect to locale-speci\214c)-.15 F .422 -(string comparison when using the)184 526.8 R F2([[)2.922 E F0 .422 -(conditional command')2.922 F(s)-.55 E F2(<)2.922 E F0(and)2.922 E F2(>) -2.923 E F0 .423(operators \(see pre-)2.923 F(vious item\) and the ef)184 -538.8 Q(fect of interrupting a command list.)-.25 E F2(compat41)144 -550.8 Q F0 1.444(If set,)184 562.8 R F2(bash)3.944 E F0 3.944(,w)C 1.443 +459.6 Q F1([[)2.5 E F0(conditional command')2.5 E(s)-.55 E F1(=~)2.5 E +F0(operator)2.5 E(.)-.55 E F1(compat32)144 471.6 Q F0 1.41(If set,)184 +483.6 R F1(bash)3.91 E F0 1.41(changes its beha)3.91 F 1.409 +(vior to that of v)-.2 F 1.409 +(ersion 3.2 with respect to locale-speci\214c)-.15 F 1.265 +(string comparison when using the)184 495.6 R F1([[)3.766 E F0 1.266 +(conditional command')3.766 F(s)-.55 E F1(<)3.766 E F0(and)3.766 E F1(>) +3.766 E F0 3.766(operators. Bash)3.766 F -.15(ve)184 507.6 S .513 +(rsions prior to bash-4.1 use ASCII collation and).15 F F2(str)3.012 E +(cmp)-.37 E F0 .512(\(3\); bash-4.1 and later use the).19 F +(current locale')184 519.6 Q 2.5(sc)-.55 G(ollation sequence and)-2.5 E +F2(str)2.5 E(coll)-.37 E F0(\(3\).).51 E F1(compat40)144 531.6 Q F0 +1.409(If set,)184 543.6 R F1(bash)3.909 E F0 1.409(changes its beha) +3.909 F 1.409(vior to that of v)-.2 F 1.41 +(ersion 4.0 with respect to locale-speci\214c)-.15 F .423 +(string comparison when using the)184 555.6 R F1([[)2.922 E F0 .422 +(conditional command')2.922 F(s)-.55 E F1(<)2.922 E F0(and)2.922 E F1(>) +2.922 E F0 .422(operators \(see pre-)2.922 F(vious item\) and the ef)184 +567.6 Q(fect of interrupting a command list.)-.25 E F1(compat41)144 +579.6 Q F0 1.443(If set,)184 591.6 R F1(bash)3.943 E F0 3.943(,w)C 1.444 (hen in posix mode, treats a single quote in a double-quoted parameter) --3.944 F -.15(ex)184 574.8 S .958(pansion as a special character).15 F -5.958(.T)-.55 G .959(he single quotes must match \(an e)-5.958 F -.15 -(ve)-.25 G 3.459(nn).15 G .959(umber\) and)-3.459 F .59 +-3.943 F -.15(ex)184 603.6 S .959(pansion as a special character).15 F +5.959(.T)-.55 G .958(he single quotes must match \(an e)-5.959 F -.15 +(ve)-.25 G 3.458(nn).15 G .958(umber\) and)-3.458 F .59 (the characters between the single quotes are considered quoted.)184 -586.8 R .59(This is the beha)5.59 F .59(vior of)-.2 F .589 -(posix mode through v)184 598.8 R .589(ersion 4.1.)-.15 F .589(The def) -5.589 F .589(ault bash beha)-.1 F .589(vior remains as in pre)-.2 F .59 -(vious v)-.25 F(er)-.15 E(-)-.2 E(sions.)184 610.8 Q F2 -(complete_fullquote)144 622.8 Q F0 .654(If set,)184 634.8 R F2(bash) +615.6 R .59(This is the beha)5.59 F .59(vior of)-.2 F .59 +(posix mode through v)184 627.6 R .589(ersion 4.1.)-.15 F .589(The def) +5.589 F .589(ault bash beha)-.1 F .589(vior remains as in pre)-.2 F .589 +(vious v)-.25 F(er)-.15 E(-)-.2 E(sions.)184 639.6 Q F1 +(complete_fullquote)144 651.6 Q F0 .653(If set,)184 663.6 R F1(bash) 3.153 E F0 .653(quotes all shell metacharacters in \214lenames and dire\ -ctory names when per)3.153 F(-)-.2 E 1.524(forming completion.)184 646.8 -R 1.524(If not set,)6.524 F F2(bash)4.024 E F0(remo)4.024 E -.15(ve)-.15 +ctory names when per)3.153 F(-)-.2 E 1.525(forming completion.)184 675.6 +R 1.524(If not set,)6.525 F F1(bash)4.024 E F0(remo)4.024 E -.15(ve)-.15 G 4.024(sm).15 G 1.524(etacharacters such as the dollar sign)-4.024 F 2.667(from the set of characters that will be quoted in completed \214l\ -enames when these)184 658.8 R .028(metacharacters appear in shell v)184 -670.8 R .028(ariable references in w)-.25 F .029(ords to be completed.) --.1 F .029(This means)5.029 F 1.073(that dollar signs in v)184 682.8 R +enames when these)184 687.6 R .029(metacharacters appear in shell v)184 +699.6 R .028(ariable references in w)-.25 F .028(ords to be completed.) +-.1 F .028(This means)5.028 F 1.072(that dollar signs in v)184 711.6 R 1.073(ariable names that e)-.25 F 1.073 (xpand to directories will not be quoted; ho)-.15 F(w-)-.25 E -2.15 -.25 -(ev e)184 694.8 T 1.922 -.4(r, a).25 H 1.422 -.15(ny d).4 H 1.123 +(ev e)184 723.6 T 1.923 -.4(r, a).25 H 1.423 -.15(ny d).4 H 1.123 (ollar signs appearing in \214lenames will not be quoted, either).15 F -6.123(.T)-.55 G 1.123(his is acti)-6.123 F -.15(ve)-.25 G .59 -(only when bash is using backslashes to quote completed \214lenames.)184 -706.8 R .59(This v)5.59 F .59(ariable is set)-.25 F(by def)184 718.8 Q -(ault, which is the def)-.1 E(ault bash beha)-.1 E(vior in v)-.2 E -(ersions through 4.2.)-.15 E(GNU Bash 4.2)72 768 Q(2011 September 25) -135.955 E(65)185.115 E 0 Cg EP +6.123(.T)-.55 G 1.122(his is acti)-6.123 F -.15(ve)-.25 G(GNU Bash 4.2) +72 768 Q(2011 September 25)135.955 E(65)185.115 E 0 Cg EP %%Page: 66 66 %%BeginPageSetup BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E/F1 10/Times-Bold@0 SF(dir)144 84 Q(expand)-.18 E F0 .486(If set,) -184 96 R F1(bash)2.986 E F0 .486 +-.35 E .59 +(only when bash is using backslashes to quote completed \214lenames.)184 +84 R .59(This v)5.59 F .59(ariable is set)-.25 F(by def)184 96 Q +(ault, which is the def)-.1 E(ault bash beha)-.1 E(vior in v)-.2 E +(ersions through 4.2.)-.15 E/F1 10/Times-Bold@0 SF(dir)144 108 Q(expand) +-.18 E F0 .487(If set,)184 120 R F1(bash)2.987 E F0 .486 (replaces directory names with the results of w)2.986 F .486(ord e)-.1 F -.487(xpansion when perform-)-.15 F .18(ing \214lename completion.)184 -108 R .179(This changes the contents of the readline editing b)5.18 F -(uf)-.2 E(fer)-.25 E 5.179(.I)-.55 G 2.679(fn)-5.179 G(ot)-2.679 E(set,) -184 120 Q F1(bash)2.5 E F0(attempts to preserv)2.5 E 2.5(ew)-.15 G -(hat the user typed.)-2.5 E F1(dirspell)144 132 Q F0 .858(If set,)7.77 F -F1(bash)3.358 E F0 .858 -(attempts spelling correction on directory names during w)3.358 F .859 +.486(xpansion when perform-)-.15 F .179(ing \214lename completion.)184 +132 R .179(This changes the contents of the readline editing b)5.179 F +(uf)-.2 E(fer)-.25 E 5.18(.I)-.55 G 2.68(fn)-5.18 G(ot)-2.68 E(set,)184 +144 Q F1(bash)2.5 E F0(attempts to preserv)2.5 E 2.5(ew)-.15 G +(hat the user typed.)-2.5 E F1(dirspell)144 156 Q F0 .859(If set,)7.77 F +F1(bash)3.359 E F0 .858 +(attempts spelling correction on directory names during w)3.359 F .858 (ord completion if)-.1 F -(the directory name initially supplied does not e)184 144 Q(xist.)-.15 E -F1(dotglob)144 156 Q F0 .165(If set,)7.77 F F1(bash)2.665 E F0 .165 +(the directory name initially supplied does not e)184 168 Q(xist.)-.15 E +F1(dotglob)144 180 Q F0 .165(If set,)7.77 F F1(bash)2.665 E F0 .165 (includes \214lenames be)2.665 F .165(ginning with a `.)-.15 F 2.665('i) -.7 G 2.665(nt)-2.665 G .165(he results of pathname e)-2.665 F -(xpansion.)-.15 E F1(execfail)144 168 Q F0 1.386 -(If set, a non-interacti)7.79 F 1.686 -.15(ve s)-.25 H 1.386 +(xpansion.)-.15 E F1(execfail)144 192 Q F0 1.387 +(If set, a non-interacti)7.79 F 1.687 -.15(ve s)-.25 H 1.386 (hell will not e).15 F 1.386(xit if it cannot e)-.15 F -.15(xe)-.15 G -1.387(cute the \214le speci\214ed as an).15 F(ar)184 180 Q +1.386(cute the \214le speci\214ed as an).15 F(ar)184 204 Q (gument to the)-.18 E F1(exec)2.5 E F0 -.2(bu)2.5 G(iltin command.).2 E (An interacti)5 E .3 -.15(ve s)-.25 H(hell does not e).15 E(xit if)-.15 -E F1(exec)2.5 E F0 -.1(fa)2.5 G(ils.).1 E F1(expand_aliases)144 192 Q F0 -.717(If set, aliases are e)184 204 R .717(xpanded as described abo)-.15 +E F1(exec)2.5 E F0 -.1(fa)2.5 G(ils.).1 E F1(expand_aliases)144 216 Q F0 +.716(If set, aliases are e)184 228 R .717(xpanded as described abo)-.15 F 1.017 -.15(ve u)-.15 H(nder).15 E/F2 9/Times-Bold@0 SF(ALIASES)3.217 E -/F3 9/Times-Roman@0 SF(.)A F0 .716(This option is enabled)5.217 F -(by def)184 216 Q(ault for interacti)-.1 E .3 -.15(ve s)-.25 H(hells.) -.15 E F1(extdeb)144 228 Q(ug)-.2 E F0(If set, beha)184 240 Q +/F3 9/Times-Roman@0 SF(.)A F0 .717(This option is enabled)5.217 F +(by def)184 240 Q(ault for interacti)-.1 E .3 -.15(ve s)-.25 H(hells.) +.15 E F1(extdeb)144 252 Q(ug)-.2 E F0(If set, beha)184 264 Q (vior intended for use by deb)-.2 E(uggers is enabled:)-.2 E F1(1.)184 -252 Q F0(The)28.5 E F14.25 E F0 1.75(option to the)4.25 F F1 +276 Q F0(The)28.5 E F14.251 E F0 1.751(option to the)4.251 F F1 (declar)4.251 E(e)-.18 E F0 -.2(bu)4.251 G 1.751 (iltin displays the source \214le name and line).2 F -(number corresponding to each function name supplied as an ar)220 264 Q -(gument.)-.18 E F1(2.)184 276 Q F0 1.667(If the command run by the)28.5 +(number corresponding to each function name supplied as an ar)220 288 Q +(gument.)-.18 E F1(2.)184 300 Q F0 1.667(If the command run by the)28.5 F F1(DEB)4.167 E(UG)-.1 E F0 1.667(trap returns a non-zero v)4.167 F -1.667(alue, the ne)-.25 F(xt)-.15 E(command is skipped and not e)220 288 -Q -.15(xe)-.15 G(cuted.).15 E F1(3.)184 300 Q F0 .84 -(If the command run by the)28.5 F F1(DEB)3.34 E(UG)-.1 E F0 .841 -(trap returns a v)3.341 F .841(alue of 2, and the shell is)-.25 F -.15 -(exe)220 312 S .488 +1.667(alue, the ne)-.25 F(xt)-.15 E(command is skipped and not e)220 312 +Q -.15(xe)-.15 G(cuted.).15 E F1(3.)184 324 Q F0 .841 +(If the command run by the)28.5 F F1(DEB)3.341 E(UG)-.1 E F0 .841 +(trap returns a v)3.341 F .84(alue of 2, and the shell is)-.25 F -.15 +(exe)220 336 S .488 (cuting in a subroutine \(a shell function or a shell script e).15 F -.15(xe)-.15 G .488(cuted by the).15 F F1(.)2.988 E F0(or)2.988 E F1 -(sour)220 324 Q(ce)-.18 E F0 -.2(bu)2.5 G(iltins\), a call to).2 E F1 --.18(re)2.5 G(tur).18 E(n)-.15 E F0(is simulated.)2.5 E F1(4.)184 336 Q -F2 -.27(BA)28.5 G(SH_ARGC).27 E F0(and)3.153 E F2 -.27(BA)3.403 G +(sour)220 348 Q(ce)-.18 E F0 -.2(bu)2.5 G(iltins\), a call to).2 E F1 +-.18(re)2.5 G(tur).18 E(n)-.15 E F0(is simulated.)2.5 E F1(4.)184 360 Q +F2 -.27(BA)28.5 G(SH_ARGC).27 E F0(and)3.154 E F2 -.27(BA)3.404 G (SH_ARGV).27 E F0 .904(are updated as described in their descriptions) -3.154 F(abo)220 348 Q -.15(ve)-.15 G(.).15 E F1(5.)184 360 Q F0 1.359 +3.154 F(abo)220 372 Q -.15(ve)-.15 G(.).15 E F1(5.)184 384 Q F0 1.359 (Function tracing is enabled:)28.5 F 1.359 (command substitution, shell functions, and sub-)6.359 F(shells in)220 -372 Q -.2(vo)-.4 G -.1(ke).2 G 2.5(dw).1 G(ith)-2.5 E F1(\()2.5 E/F4 10 +396 Q -.2(vo)-.4 G -.1(ke).2 G 2.5(dw).1 G(ith)-2.5 E F1(\()2.5 E/F4 10 /Times-Italic@0 SF(command)2.5 E F1(\))2.5 E F0(inherit the)2.5 E F1 (DEB)2.5 E(UG)-.1 E F0(and)2.5 E F1(RETURN)2.5 E F0(traps.)2.5 E F1(6.) -184 384 Q F0 .804(Error tracing is enabled:)28.5 F .805 -(command substitution, shell functions, and subshells)5.804 F(in)220 396 +184 408 Q F0 .805(Error tracing is enabled:)28.5 F .804 +(command substitution, shell functions, and subshells)5.805 F(in)220 420 Q -.2(vo)-.4 G -.1(ke).2 G 2.5(dw).1 G(ith)-2.5 E F1(\()2.5 E F4 (command)2.5 E F1(\))2.5 E F0(inherit the)2.5 E F1(ERR)2.5 E F0(trap.) -2.5 E F1(extglob)144 408 Q F0 .4(If set, the e)8.89 F .4 +2.5 E F1(extglob)144 432 Q F0 .4(If set, the e)8.89 F .4 (xtended pattern matching features described abo)-.15 F .7 -.15(ve u) --.15 H(nder).15 E F1 -.1(Pa)2.9 G .4(thname Expan-).1 F(sion)184 420 Q -F0(are enabled.)2.5 E F1(extquote)144 432 Q F0 2.473(If set,)184 444 R +-.15 H(nder).15 E F1 -.1(Pa)2.9 G .4(thname Expan-).1 F(sion)184 444 Q +F0(are enabled.)2.5 E F1(extquote)144 456 Q F0 2.473(If set,)184 468 R F1($)4.973 E F0<08>A F4(string)A F0 4.973<0861>C(nd)-4.973 E F1($)4.973 E F0(")A F4(string)A F0 4.973("q)C 2.473(uoting is performed within) -4.973 F F1(${)4.973 E F4(par)A(ameter)-.15 E F1(})A F0 -.15(ex)4.973 G -(pansions).15 E(enclosed in double quotes.)184 456 Q -(This option is enabled by def)5 E(ault.)-.1 E F1(failglob)144 468 Q F0 -1.425(If set, patterns which f)7.77 F 1.425 -(ail to match \214lenames during pathname e)-.1 F 1.424 -(xpansion result in an)-.15 F -.15(ex)184 480 S(pansion error).15 E(.) --.55 E F1 -.25(fo)144 492 S -.18(rc).25 G(e_\214gnor).18 E(e)-.18 E F0 -.936(If set, the suf)184 504 R<8c78>-.25 E .936(es speci\214ed by the) +(pansions).15 E(enclosed in double quotes.)184 480 Q +(This option is enabled by def)5 E(ault.)-.1 E F1(failglob)144 492 Q F0 +1.424(If set, patterns which f)7.77 F 1.425 +(ail to match \214lenames during pathname e)-.1 F 1.425 +(xpansion result in an)-.15 F -.15(ex)184 504 S(pansion error).15 E(.) +-.55 E F1 -.25(fo)144 516 S -.18(rc).25 G(e_\214gnor).18 E(e)-.18 E F0 +.937(If set, the suf)184 528 R<8c78>-.25 E .936(es speci\214ed by the) -.15 F F2(FIGNORE)3.436 E F0 .936(shell v)3.186 F .936(ariable cause w) --.25 F .937(ords to be ignored)-.1 F .32(when performing w)184 516 R .32 +-.25 F .936(ords to be ignored)-.1 F .32(when performing w)184 540 R .32 (ord completion e)-.1 F -.15(ve)-.25 G 2.82(ni).15 G 2.82(ft)-2.82 G .32 -(he ignored w)-2.82 F .32(ords are the only possible com-)-.1 F 2.947 -(pletions. See)184 528 R F2 .447(SHELL V)2.947 F(ARIABLES)-1.215 E F0 -(abo)2.697 E .747 -.15(ve f)-.15 H .448(or a description of).15 F F2 -(FIGNORE)2.948 E F3(.)A F0 .448(This option is)4.948 F(enabled by def) -184 540 Q(ault.)-.1 E F1(globasciiranges)144 552 Q F0 .806 -(If set, range e)184 564 R .806 -(xpressions used in pattern matching \(see)-.15 F F2 -.09(Pa)3.305 G -(tter).09 E 3.055(nM)-.135 G(atching)-3.055 E F0(abo)3.055 E -.15(ve) --.15 G 3.305(\)b).15 G(eha)-3.305 E -.15(ve)-.2 G 2.089 -(as if in the traditional C locale when performing comparisons.)184 576 -R 2.09(That is, the current)7.089 F(locale')184 588 Q 2.614(sc)-.55 G -.114(ollating sequence is not tak)-2.614 F .113(en into account, so)-.1 -F F1(b)2.613 E F0 .113(will not collate between)2.613 F F1(A)2.613 E F0 -(and)2.613 E F1(B)184 600 Q F0 2.5(,a)C(nd upper)-2.5 E(-case and lo)-.2 +(he ignored w)-2.82 F .32(ords are the only possible com-)-.1 F 2.948 +(pletions. See)184 552 R F2 .448(SHELL V)2.948 F(ARIABLES)-1.215 E F0 +(abo)2.698 E .748 -.15(ve f)-.15 H .448(or a description of).15 F F2 +(FIGNORE)2.947 E F3(.)A F0 .447(This option is)4.947 F(enabled by def) +184 564 Q(ault.)-.1 E F1(globasciiranges)144 576 Q F0 .805 +(If set, range e)184 588 R .806 +(xpressions used in pattern matching \(see)-.15 F F2 -.09(Pa)3.306 G +(tter).09 E 3.056(nM)-.135 G(atching)-3.056 E F0(abo)3.056 E -.15(ve) +-.15 G 3.306(\)b).15 G(eha)-3.306 E -.15(ve)-.2 G 2.089 +(as if in the traditional C locale when performing comparisons.)184 600 +R 2.089(That is, the current)7.089 F(locale')184 612 Q 2.613(sc)-.55 G +.113(ollating sequence is not tak)-2.613 F .113(en into account, so)-.1 +F F1(b)2.613 E F0 .114(will not collate between)2.613 F F1(A)2.614 E F0 +(and)2.614 E F1(B)184 624 Q F0 2.5(,a)C(nd upper)-2.5 E(-case and lo)-.2 E(wer)-.25 E(-case ASCII characters will collate together)-.2 E(.)-.55 E -F1(globstar)144 612 Q F0 .518(If set, the pattern)5 F F1(**)3.018 E F0 -.519(used in a pathname e)3.019 F .519(xpansion conte)-.15 F .519 -(xt will match all \214les and zero)-.15 F .432 -(or more directories and subdirectories.)184 624 R .431 -(If the pattern is follo)5.432 F .431(wed by a)-.25 F F1(/)2.931 E F0 -2.931(,o)C .431(nly directories)-2.931 F(and subdirectories match.)184 -636 Q F1(gnu_errfmt)144 648 Q F0(If set, shell error messages are writt\ -en in the standard GNU error message format.)184 660 Q F1(histappend)144 -672 Q F0 .676 +F1(globstar)144 636 Q F0 .519(If set, the pattern)5 F F1(**)3.019 E F0 +.519(used in a pathname e)3.019 F .519(xpansion conte)-.15 F .518 +(xt will match all \214les and zero)-.15 F .431 +(or more directories and subdirectories.)184 648 R .431 +(If the pattern is follo)5.431 F .432(wed by a)-.25 F F1(/)2.932 E F0 +2.932(,o)C .432(nly directories)-2.932 F(and subdirectories match.)184 +660 Q F1(gnu_errfmt)144 672 Q F0(If set, shell error messages are writt\ +en in the standard GNU error message format.)184 684 Q F1(histappend)144 +696 Q F0 .676 (If set, the history list is appended to the \214le named by the v)184 -684 R .676(alue of the)-.25 F F2(HISTFILE)3.177 E F0 -.25(va)2.927 G -(ri-).25 E(able when the shell e)184 696 Q(xits, rather than o)-.15 E +708 R .676(alue of the)-.25 F F2(HISTFILE)3.176 E F0 -.25(va)2.926 G +(ri-).25 E(able when the shell e)184 720 Q(xits, rather than o)-.15 E -.15(ve)-.15 G(rwriting the \214le.).15 E(GNU Bash 4.2)72 768 Q (2011 September 25)135.955 E(66)185.115 E 0 Cg EP %%Page: 67 67 @@ -7903,23 +7914,23 @@ en in the standard GNU error message format.)184 660 Q F1(histappend)144 BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E/F1 10/Times-Bold@0 SF(histr)144 84 Q(eedit)-.18 E F0 .576 -(If set, and)184 96 R F1 -.18(re)3.076 G(adline).18 E F0 .575 -(is being used, a user is gi)3.076 F -.15(ve)-.25 G 3.075(nt).15 G .575 -(he opportunity to re-edit a f)-3.075 F .575(ailed his-)-.1 F -(tory substitution.)184 108 Q F1(histv)144 120 Q(erify)-.1 E F0 .402 +-.35 E/F1 10/Times-Bold@0 SF(histr)144 84 Q(eedit)-.18 E F0 .575 +(If set, and)184 96 R F1 -.18(re)3.075 G(adline).18 E F0 .575 +(is being used, a user is gi)3.075 F -.15(ve)-.25 G 3.075(nt).15 G .576 +(he opportunity to re-edit a f)-3.075 F .576(ailed his-)-.1 F +(tory substitution.)184 108 Q F1(histv)144 120 Q(erify)-.1 E F0 .403 (If set, and)184 132 R F1 -.18(re)2.903 G(adline).18 E F0 .403 (is being used, the results of history substitution are not immediately) -2.903 F .662(passed to the shell parser)184 144 R 5.662(.I)-.55 G .661 -(nstead, the resulting line is loaded into the)-5.662 F F1 -.18(re)3.161 -G(adline).18 E F0(editing)3.161 E -.2(bu)184 156 S -.25(ff).2 G(er).25 E +2.903 F .661(passed to the shell parser)184 144 R 5.661(.I)-.55 G .662 +(nstead, the resulting line is loaded into the)-5.661 F F1 -.18(re)3.162 +G(adline).18 E F0(editing)3.162 E -.2(bu)184 156 S -.25(ff).2 G(er).25 E 2.5(,a)-.4 G(llo)-2.5 E(wing further modi\214cation.)-.25 E F1 -(hostcomplete)144 168 Q F0 1.181(If set, and)184 180 R F1 -.18(re)3.681 -G(adline).18 E F0 1.181(is being used,)3.681 F F1(bash)3.682 E F0 1.182 -(will attempt to perform hostname completion)3.682 F 1.381(when a w)184 -192 R 1.381(ord containing a)-.1 F F1(@)3.881 E F0 1.381 -(is being completed \(see)3.881 F F1(Completing)3.88 E F0(under)3.88 E -/F2 9/Times-Bold@0 SF(READLINE)3.88 E F0(abo)184 204 Q -.15(ve)-.15 G +(hostcomplete)144 168 Q F0 1.182(If set, and)184 180 R F1 -.18(re)3.682 +G(adline).18 E F0 1.182(is being used,)3.682 F F1(bash)3.682 E F0 1.181 +(will attempt to perform hostname completion)3.681 F 1.38(when a w)184 +192 R 1.38(ord containing a)-.1 F F1(@)3.881 E F0 1.381 +(is being completed \(see)3.881 F F1(Completing)3.881 E F0(under)3.881 E +/F2 9/Times-Bold@0 SF(READLINE)3.881 E F0(abo)184 204 Q -.15(ve)-.15 G 2.5(\). This).15 F(is enabled by def)2.5 E(ault.)-.1 E F1(huponexit)144 216 Q F0(If set,)184 228 Q F1(bash)2.5 E F0(will send)2.5 E F2(SIGHUP) 2.5 E F0(to all jobs when an interacti)2.25 E .3 -.15(ve l)-.25 H @@ -7929,56 +7940,56 @@ G(adline).18 E F0 1.181(is being used,)3.681 F F1(bash)3.682 E F0 1.182 (to cause that w)2.83 F .33(ord and all remaining characters on)-.1 F .967(that line to be ignored in an interacti)184 264 R 1.267 -.15(ve s) -.25 H .967(hell \(see).15 F F2(COMMENTS)3.467 E F0(abo)3.217 E -.15(ve) --.15 G 3.467(\). This).15 F .967(option is)3.467 F(enabled by def)184 -276 Q(ault.)-.1 E F1(lastpipe)144 288 Q F0 1.211 +-.15 G 3.467(\). This).15 F .968(option is)3.468 F(enabled by def)184 +276 Q(ault.)-.1 E F1(lastpipe)144 288 Q F0 1.212 (If set, and job control is not acti)6.66 F -.15(ve)-.25 G 3.712(,t).15 G 1.212(he shell runs the last command of a pipeline not)-3.712 F -.15 (exe)184 300 S(cuted in the background in the current shell en).15 E -(vironment.)-.4 E F1(lithist)144 312 Q F0 .655(If set, and the)15.55 F -F1(cmdhist)3.155 E F0 .654 +(vironment.)-.4 E F1(lithist)144 312 Q F0 .654(If set, and the)15.55 F +F1(cmdhist)3.154 E F0 .654 (option is enabled, multi-line commands are sa)3.154 F -.15(ve)-.2 G -3.154(dt).15 G 3.154(ot)-3.154 G .654(he history)-3.154 F +3.155(dt).15 G 3.155(ot)-3.155 G .655(he history)-3.155 F (with embedded ne)184 324 Q (wlines rather than using semicolon separators where possible.)-.25 E F1 (login_shell)144 336 Q F0 .486 (The shell sets this option if it is started as a login shell \(see)184 -348 R F2(INV)2.987 E(OCA)-.405 E(TION)-.855 E F0(abo)2.737 E -.15(ve) --.15 G 2.987(\). The).15 F -.25(va)184 360 S(lue may not be changed.).25 -E F1(mailwar)144 372 Q(n)-.15 E F0 .815(If set, and a \214le that)184 -384 R F1(bash)3.315 E F0 .814 -(is checking for mail has been accessed since the last time it)3.315 F +348 R F2(INV)2.986 E(OCA)-.405 E(TION)-.855 E F0(abo)2.736 E -.15(ve) +-.15 G 2.986(\). The).15 F -.25(va)184 360 S(lue may not be changed.).25 +E F1(mailwar)144 372 Q(n)-.15 E F0 .814(If set, and a \214le that)184 +384 R F1(bash)3.314 E F0 .815 +(is checking for mail has been accessed since the last time it)3.314 F -.1(wa)184 396 S 2.5(sc).1 G(heck)-2.5 E(ed, the message `)-.1 E (`The mail in)-.74 E/F3 10/Times-Italic@0 SF(mail\214le)2.5 E F0 (has been read')2.5 E 2.5('i)-.74 G 2.5(sd)-2.5 G(isplayed.)-2.5 E F1 -(no_empty_cmd_completion)144 408 Q F0 .324(If set, and)184 420 R F1 -.18 -(re)2.824 G(adline).18 E F0 .324(is being used,)2.824 F F1(bash)2.824 E -F0 .324(will not attempt to search the)2.824 F F2 -.666(PA)2.825 G(TH) --.189 E F0 .325(for possible)2.575 F +(no_empty_cmd_completion)144 408 Q F0 .325(If set, and)184 420 R F1 -.18 +(re)2.825 G(adline).18 E F0 .325(is being used,)2.825 F F1(bash)2.824 E +F0 .324(will not attempt to search the)2.824 F F2 -.666(PA)2.824 G(TH) +-.189 E F0 .324(for possible)2.574 F (completions when completion is attempted on an empty line.)184 432 Q F1 -(nocaseglob)144 444 Q F0 .437(If set,)184 456 R F1(bash)2.937 E F0 .436 -(matches \214lenames in a case\255insensiti)2.937 F .736 -.15(ve f)-.25 -H .436(ashion when performing pathname).05 F -.15(ex)184 468 S +(nocaseglob)144 444 Q F0 .436(If set,)184 456 R F1(bash)2.936 E F0 .436 +(matches \214lenames in a case\255insensiti)2.936 F .737 -.15(ve f)-.25 +H .437(ashion when performing pathname).05 F -.15(ex)184 468 S (pansion \(see).15 E F1 -.1(Pa)2.5 G(thname Expansion).1 E F0(abo)2.5 E --.15(ve)-.15 G(\).).15 E F1(nocasematch)144 480 Q F0 1.193(If set,)184 -492 R F1(bash)3.693 E F0 1.194(matches patterns in a case\255insensiti) -3.693 F 1.494 -.15(ve f)-.25 H 1.194(ashion when performing matching).05 +-.15(ve)-.15 G(\).).15 E F1(nocasematch)144 480 Q F0 1.194(If set,)184 +492 R F1(bash)3.694 E F0 1.194(matches patterns in a case\255insensiti) +3.694 F 1.493 -.15(ve f)-.25 H 1.193(ashion when performing matching).05 F(while e)184 504 Q -.15(xe)-.15 G(cuting).15 E F1(case)2.5 E F0(or)2.5 E F1([[)2.5 E F0(conditional commands.)2.5 E F1(nullglob)144 516 Q F0 -.855(If set,)184 528 R F1(bash)3.355 E F0(allo)3.355 E .855 -(ws patterns which match no \214les \(see)-.25 F F1 -.1(Pa)3.354 G .854 -(thname Expansion).1 F F0(abo)3.354 E -.15(ve)-.15 G 3.354(\)t).15 G(o) --3.354 E -.15(ex)184 540 S(pand to a null string, rather than themselv) -.15 E(es.)-.15 E F1(pr)144 552 Q(ogcomp)-.18 E F0 .676 +.854(If set,)184 528 R F1(bash)3.354 E F0(allo)3.354 E .855 +(ws patterns which match no \214les \(see)-.25 F F1 -.1(Pa)3.355 G .855 +(thname Expansion).1 F F0(abo)3.355 E -.15(ve)-.15 G 3.355(\)t).15 G(o) +-3.355 E -.15(ex)184 540 S(pand to a null string, rather than themselv) +.15 E(es.)-.15 E F1(pr)144 552 Q(ogcomp)-.18 E F0 .677 (If set, the programmable completion f)184 564 R .677(acilities \(see) --.1 F F1(Pr)3.177 E .677(ogrammable Completion)-.18 F F0(abo)3.177 E +-.1 F F1(Pr)3.176 E .676(ogrammable Completion)-.18 F F0(abo)3.176 E -.15(ve)-.15 G(\)).15 E(are enabled.)184 576 Q (This option is enabled by def)5 E(ault.)-.1 E F1(pr)144 588 Q(omptv) --.18 E(ars)-.1 E F0 1.448(If set, prompt strings under)184 600 R 1.448 -(go parameter e)-.18 F 1.447(xpansion, command substitution, arithmetic) --.15 F -.15(ex)184 612 S .17(pansion, and quote remo).15 F -.25(va)-.15 +-.18 E(ars)-.1 E F0 1.447(If set, prompt strings under)184 600 R 1.448 +(go parameter e)-.18 F 1.448(xpansion, command substitution, arithmetic) +-.15 F -.15(ex)184 612 S .171(pansion, and quote remo).15 F -.25(va)-.15 G 2.67(la).25 G .17(fter being e)-2.67 F .17(xpanded as described in) --.15 F F2(PR)2.671 E(OMPTING)-.27 E F0(abo)2.421 E -.15(ve)-.15 G(.).15 -E(This option is enabled by def)184 624 Q(ault.)-.1 E F1 -.18(re)144 636 +-.15 F F2(PR)2.67 E(OMPTING)-.27 E F0(abo)2.42 E -.15(ve)-.15 G(.).15 E +(This option is enabled by def)184 624 Q(ault.)-.1 E F1 -.18(re)144 636 S(stricted_shell).18 E F0 1.069 (The shell sets this option if it is started in restricted mode \(see) 184 648 R F2 1.069(RESTRICTED SHELL)3.569 F F0(belo)184 660 Q 4.178 @@ -7986,9 +7997,9 @@ S(stricted_shell).18 E F0 1.069 1.678(This is not reset when the startup \214les are)6.678 F -.15(exe) 184 672 S(cuted, allo).15 E(wing the startup \214les to disco)-.25 E -.15(ve)-.15 G 2.5(rw).15 G(hether or not a shell is restricted.)-2.5 E -F1(shift_v)144 684 Q(erbose)-.1 E F0 .502(If set, the)184 696 R F1 -(shift)3.002 E F0 -.2(bu)3.002 G .501 -(iltin prints an error message when the shift count e).2 F .501 +F1(shift_v)144 684 Q(erbose)-.1 E F0 .501(If set, the)184 696 R F1 +(shift)3.001 E F0 -.2(bu)3.001 G .501 +(iltin prints an error message when the shift count e).2 F .502 (xceeds the number)-.15 F(of positional parameters.)184 708 Q (GNU Bash 4.2)72 768 Q(2011 September 25)135.955 E(67)185.115 E 0 Cg EP %%Page: 68 68 @@ -7996,41 +8007,41 @@ F1(shift_v)144 684 Q(erbose)-.1 E F0 .502(If set, the)184 696 R F1 BP %%EndPageSetup /F0 10/Times-Roman@0 SF -.35(BA)72 48 S 389.54(SH\(1\) B).35 F(ASH\(1\)) --.35 E/F1 10/Times-Bold@0 SF(sour)144 84 Q(cepath)-.18 E F0 .77 -(If set, the)184 96 R F1(sour)3.27 E(ce)-.18 E F0(\()3.27 E F1(.)A F0 -3.27(\)b)C .77(uiltin uses the v)-3.47 F .771(alue of)-.25 F/F2 9 -/Times-Bold@0 SF -.666(PA)3.271 G(TH)-.189 E F0 .771 -(to \214nd the directory containing the)3.021 F -(\214le supplied as an ar)184 108 Q 2.5(gument. This)-.18 F -(option is enabled by def)2.5 E(ault.)-.1 E F1(xpg_echo)144 120 Q F0 -(If set, the)184 132 Q F1(echo)2.5 E F0 -.2(bu)2.5 G(iltin e).2 E -(xpands backslash-escape sequences by def)-.15 E(ault.)-.1 E F1(suspend) -108 148.8 Q F0([)2.5 E F1A F0(])A 1.002(Suspend the e)144 160.8 R --.15(xe)-.15 G 1.002(cution of this shell until it recei).15 F -.15(ve) --.25 G 3.501(sa).15 G F2(SIGCONT)A F0 3.501(signal. A)3.251 F 1.001 -(login shell cannot be)3.501 F .022(suspended; the)144 172.8 R F1 -2.522 E F0 .022(option can be used to o)2.522 F -.15(ve)-.15 G .022 -(rride this and force the suspension.).15 F .023(The return status is) -5.023 F 2.5(0u)144 184.8 S(nless the shell is a login shell and)-2.5 E +-.35 E/F1 10/Times-Bold@0 SF(sour)144 84 Q(cepath)-.18 E F0 .771 +(If set, the)184 96 R F1(sour)3.271 E(ce)-.18 E F0(\()3.271 E F1(.)A F0 +3.271(\)b)C .771(uiltin uses the v)-3.471 F .771(alue of)-.25 F/F2 9 +/Times-Bold@0 SF -.666(PA)3.27 G(TH)-.189 E F0 .77 +(to \214nd the directory containing the)3.02 F(\214le supplied as an ar) +184 108 Q 2.5(gument. This)-.18 F(option is enabled by def)2.5 E(ault.) +-.1 E F1(xpg_echo)144 120 Q F0(If set, the)184 132 Q F1(echo)2.5 E F0 +-.2(bu)2.5 G(iltin e).2 E(xpands backslash-escape sequences by def)-.15 +E(ault.)-.1 E F1(suspend)108 148.8 Q F0([)2.5 E F1A F0(])A 1.001 +(Suspend the e)144 160.8 R -.15(xe)-.15 G 1.001 +(cution of this shell until it recei).15 F -.15(ve)-.25 G 3.501(sa).15 G +F2(SIGCONT)A F0 3.502(signal. A)3.252 F 1.002(login shell cannot be) +3.502 F .023(suspended; the)144 172.8 R F12.523 E F0 .023 +(option can be used to o)2.523 F -.15(ve)-.15 G .022 +(rride this and force the suspension.).15 F .022(The return status is) +5.022 F 2.5(0u)144 184.8 S(nless the shell is a login shell and)-2.5 E F12.5 E F0(is not supplied, or if job control is not enabled.)2.5 E F1(test)108 201.6 Q/F3 10/Times-Italic@0 SF -.2(ex)2.5 G(pr).2 E F1([) -108 213.6 Q F3 -.2(ex)2.5 G(pr).2 E F1(])2.5 E F0 .878 -(Return a status of 0 \(true\) or 1 \(f)6.77 F .877 -(alse\) depending on the e)-.1 F -.25(va)-.25 G .877 +108 213.6 Q F3 -.2(ex)2.5 G(pr).2 E F1(])2.5 E F0 .877 +(Return a status of 0 \(true\) or 1 \(f)6.77 F .878 +(alse\) depending on the e)-.1 F -.25(va)-.25 G .878 (luation of the conditional e).25 F(xpression)-.15 E F3 -.2(ex)144 225.6 S(pr).2 E F0 5.53(.E).73 G .53 (ach operator and operand must be a separate ar)-5.53 F 3.03 -(gument. Expressions)-.18 F .53(are composed of the)3.03 F 3.08 -(primaries described abo)144 237.6 R 3.38 -.15(ve u)-.15 H(nder).15 E F2 -(CONDITION)5.58 E 3.079(AL EXPRESSIONS)-.18 F/F4 9/Times-Roman@0 SF(.)A -F1(test)7.579 E F0 3.079(does not accept an)5.579 F(y)-.15 E +(gument. Expressions)-.18 F .53(are composed of the)3.03 F 3.079 +(primaries described abo)144 237.6 R 3.379 -.15(ve u)-.15 H(nder).15 E +F2(CONDITION)5.579 E 3.079(AL EXPRESSIONS)-.18 F/F4 9/Times-Roman@0 SF +(.)A F1(test)7.579 E F0 3.08(does not accept an)5.58 F(y)-.15 E (options, nor does it accept and ignore an ar)144 249.6 Q(gument of)-.18 -E F12.5 E F0(as signifying the end of options.)2.5 E .785 -(Expressions may be combined using the follo)144 267.6 R .786 -(wing operators, listed in decreasing order of prece-)-.25 F 3.412 -(dence. The)144 279.6 R -.25(eva)3.412 G .912 -(luation depends on the number of ar).25 F .911(guments; see belo)-.18 F -4.711 -.65(w. O)-.25 H .911(perator precedence is).65 F +E F12.5 E F0(as signifying the end of options.)2.5 E .786 +(Expressions may be combined using the follo)144 267.6 R .785 +(wing operators, listed in decreasing order of prece-)-.25 F 3.411 +(dence. The)144 279.6 R -.25(eva)3.411 G .911 +(luation depends on the number of ar).25 F .912(guments; see belo)-.18 F +4.712 -.65(w. O)-.25 H .912(perator precedence is).65 F (used when there are \214v)144 291.6 Q 2.5(eo)-.15 G 2.5(rm)-2.5 G (ore ar)-2.5 E(guments.)-.18 E F1(!)144 303.6 Q F3 -.2(ex)2.5 G(pr).2 E F0 -.35(Tr)12.6 G(ue if).35 E F3 -.2(ex)2.5 G(pr).2 E F0(is f)3.23 E @@ -8053,9 +8064,9 @@ F1([)2.5 E F0 -.25(eva)2.5 G(luate conditional e).25 E E 2.5(2a)144 458.4 S -.18(rg)-2.5 G(uments).18 E .37(If the \214rst ar) 180 470.4 R .37(gument is)-.18 F F1(!)2.87 E F0 2.87(,t)C .37(he e)-2.87 F .37(xpression is true if and only if the second ar)-.15 F .37 -(gument is null.)-.18 F .379(If the \214rst ar)180 482.4 R .38 -(gument is one of the unary conditional operators listed abo)-.18 F .68 --.15(ve u)-.15 H(nder).15 E F2(CONDI-)2.88 E(TION)180 494.4 Q .553 +(gument is null.)-.18 F .38(If the \214rst ar)180 482.4 R .38 +(gument is one of the unary conditional operators listed abo)-.18 F .679 +-.15(ve u)-.15 H(nder).15 E F2(CONDI-)2.879 E(TION)180 494.4 Q .552 (AL EXPRESSIONS)-.18 F F4(,)A F0 .552(the e)2.802 F .552 (xpression is true if the unary test is true.)-.15 F .552 (If the \214rst ar)5.552 F(gu-)-.18 E(ment is not a v)180 506.4 Q @@ -8066,27 +8077,27 @@ F .37(xpression is true if and only if the second ar)-.15 F .37 (If the second ar)5.236 F .236(gument is one of)-.18 F .855 (the binary conditional operators listed abo)180 542.4 R 1.155 -.15 (ve u)-.15 H(nder).15 E F2(CONDITION)3.355 E .855(AL EXPRESSIONS)-.18 F -F4(,)A F0(the)3.104 E .578(result of the e)180 554.4 R .578(xpression i\ +F4(,)A F0(the)3.105 E .579(result of the e)180 554.4 R .578(xpression i\ s the result of the binary test using the \214rst and third ar)-.15 F -(guments)-.18 E 1.333(as operands.)180 566.4 R(The)6.333 E F13.833 -E F0(and)3.833 E F13.832 E F0 1.332 +(guments)-.18 E 1.332(as operands.)180 566.4 R(The)6.332 E F13.832 +E F0(and)3.832 E F13.832 E F0 1.333 (operators are considered binary operators when there are)3.832 F .558 (three ar)180 578.4 R 3.058(guments. If)-.18 F .558(the \214rst ar)3.058 F .558(gument is)-.18 F F1(!)3.058 E F0 3.058(,t)C .558(he v)-3.058 F .558(alue is the ne)-.25 F -.05(ga)-.15 G .558(tion of the tw).05 F -(o-ar)-.1 E(gument)-.18 E .521(test using the second and third ar)180 -590.4 R 3.021(guments. If)-.18 F .521(the \214rst ar)3.021 F .52 -(gument is e)-.18 F(xactly)-.15 E F1(\()3.02 E F0 .52(and the third)3.02 -F(ar)180 602.4 Q .485(gument is e)-.18 F(xactly)-.15 E F1(\))2.985 E F0 -2.985(,t)C .485(he result is the one-ar)-2.985 F .485 +(o-ar)-.1 E(gument)-.18 E .52(test using the second and third ar)180 +590.4 R 3.021(guments. If)-.18 F .521(the \214rst ar)3.021 F .521 +(gument is e)-.18 F(xactly)-.15 E F1(\()3.021 E F0 .521(and the third) +3.021 F(ar)180 602.4 Q .485(gument is e)-.18 F(xactly)-.15 E F1(\))2.985 +E F0 2.985(,t)C .485(he result is the one-ar)-2.985 F .485 (gument test of the second ar)-.18 F 2.985(gument. Other)-.18 F(-)-.2 E (wise, the e)180 614.4 Q(xpression is f)-.15 E(alse.)-.1 E 2.5(4a)144 -626.4 S -.18(rg)-2.5 G(uments).18 E .385(If the \214rst ar)180 638.4 R -.385(gument is)-.18 F F1(!)2.885 E F0 2.885(,t)C .385 -(he result is the ne)-2.885 F -.05(ga)-.15 G .384(tion of the three-ar) -.05 F .384(gument e)-.18 F .384(xpression com-)-.15 F 1.647 +626.4 S -.18(rg)-2.5 G(uments).18 E .384(If the \214rst ar)180 638.4 R +.384(gument is)-.18 F F1(!)2.884 E F0 2.885(,t)C .385 +(he result is the ne)-2.885 F -.05(ga)-.15 G .385(tion of the three-ar) +.05 F .385(gument e)-.18 F .385(xpression com-)-.15 F 1.648 (posed of the remaining ar)180 650.4 R 4.147(guments. Otherwise,)-.18 F -1.647(the e)4.147 F 1.648(xpression is parsed and e)-.15 F -.25(va)-.25 +1.647(the e)4.147 F 1.647(xpression is parsed and e)-.15 F -.25(va)-.25 G(luated).25 E(according to precedence using the rules listed abo)180 662.4 Q -.15(ve)-.15 G(.).15 E 2.5(5o)144 674.4 S 2.5(rm)-2.5 G(ore ar) -2.5 E(guments)-.18 E 1.635(The e)180 686.4 R 1.635 @@ -8106,61 +8117,62 @@ BP ted user and system times for the shell and for processes run from the \ shell.)13.23 F(The return status is 0.)144 96 Q F1(trap)108 112.8 Q F0 ([)2.5 E F1(\255lp)A F0 2.5(][)C([)-2.5 E/F2 10/Times-Italic@0 SF(ar)A -(g)-.37 E F0(])A F2(sigspec)2.5 E F0(...])2.5 E .703(The command)144 -124.8 R F2(ar)3.533 E(g)-.37 E F0 .703(is to be read and e)3.423 F -.15 -(xe)-.15 G .702(cuted when the shell recei).15 F -.15(ve)-.25 G 3.202 -(ss).15 G(ignal\(s\))-3.202 E F2(sigspec)3.202 E F0 5.702(.I).31 G(f) --5.702 E F2(ar)3.532 E(g)-.37 E F0(is)3.422 E .608 +(g)-.37 E F0(])A F2(sigspec)2.5 E F0(...])2.5 E .702(The command)144 +124.8 R F2(ar)3.532 E(g)-.37 E F0 .702(is to be read and e)3.422 F -.15 +(xe)-.15 G .702(cuted when the shell recei).15 F -.15(ve)-.25 G 3.203 +(ss).15 G(ignal\(s\))-3.203 E F2(sigspec)3.203 E F0 5.703(.I).31 G(f) +-5.703 E F2(ar)3.533 E(g)-.37 E F0(is)3.423 E .609 (absent \(and there is a single)144 136.8 R F2(sigspec)3.108 E F0 3.108 (\)o)C(r)-3.108 E F13.108 E F0 3.108(,e)C .608 (ach speci\214ed signal is reset to its original disposition)-3.108 F -.659(\(the v)144 148.8 R .659(alue it had upon entrance to the shell\).) --.25 F(If)5.658 E F2(ar)3.488 E(g)-.37 E F0 .658 +.658(\(the v)144 148.8 R .658(alue it had upon entrance to the shell\).) +-.25 F(If)5.658 E F2(ar)3.488 E(g)-.37 E F0 .659 (is the null string the signal speci\214ed by each)3.378 F F2(sigspec) -144.34 160.8 Q F0 .58(is ignored by the shell and by the commands it in) -3.39 F -.2(vo)-.4 G -.1(ke).2 G 3.081(s. If).1 F F2(ar)3.411 E(g)-.37 E -F0 .581(is not present and)3.301 F F13.081 E F0(has)3.081 E 1.215 +144.34 160.8 Q F0 .581 +(is ignored by the shell and by the commands it in)3.391 F -.2(vo)-.4 G +-.1(ke).2 G 3.08(s. If).1 F F2(ar)3.41 E(g)-.37 E F0 .58 +(is not present and)3.3 F F13.08 E F0(has)3.08 E 1.214 (been supplied, then the trap commands associated with each)144 172.8 R -F2(sigspec)4.054 E F0 1.214(are displayed.)4.024 F 1.214(If no ar)6.214 +F2(sigspec)4.054 E F0 1.215(are displayed.)4.024 F 1.215(If no ar)6.215 F(gu-)-.18 E .86(ments are supplied or if only)144 184.8 R F13.36 E F0 .86(is gi)3.36 F -.15(ve)-.25 G(n,).15 E F1(trap)3.36 E F0 .86 (prints the list of commands associated with each)3.36 F 2.83 (signal. The)144 196.8 R F12.83 E F0 .33(option causes the shell \ -to print a list of signal names and their corresponding num-)2.83 F 4.31 -(bers. Each)144 208.8 R F2(sigspec)4.65 E F0 1.811 -(is either a signal name de\214ned in <)4.62 F F2(signal.h)A F0 1.811 -(>, or a signal number)B 6.811(.S)-.55 G(ignal)-6.811 E +to print a list of signal names and their corresponding num-)2.83 F +4.311(bers. Each)144 208.8 R F2(sigspec)4.651 E F0 1.811 +(is either a signal name de\214ned in <)4.621 F F2(signal.h)A F0 1.81 +(>, or a signal number)B 6.81(.S)-.55 G(ignal)-6.81 E (names are case insensiti)144 220.8 Q .3 -.15(ve a)-.25 H(nd the).15 E -/F3 9/Times-Bold@0 SF(SIG)2.5 E F0(pre\214x is optional.)2.25 E 1.649 -(If a)144 238.8 R F2(sigspec)4.489 E F0(is)4.459 E F3(EXIT)4.149 E F0 -1.649(\(0\) the command)3.899 F F2(ar)4.479 E(g)-.37 E F0 1.649(is e) -4.369 F -.15(xe)-.15 G 1.649(cuted on e).15 F 1.648(xit from the shell.) --.15 F 1.648(If a)6.648 F F2(sigspec)4.488 E F0(is)4.458 E F3(DEB)144 -250.8 Q(UG)-.09 E/F4 9/Times-Roman@0 SF(,)A F0 1.167(the command)3.417 F -F2(ar)3.997 E(g)-.37 E F0 1.167(is e)3.887 F -.15(xe)-.15 G 1.167 -(cuted before e).15 F -.15(ve)-.25 G(ry).15 E F2 1.168(simple command) -3.667 F F0(,)A F2(for)3.668 E F0(command,)3.668 E F2(case)3.668 E F0 -(com-)3.668 E(mand,)144 262.8 Q F2(select)2.647 E F0 .147(command, e) -2.647 F -.15(ve)-.25 G .147(ry arithmetic).15 F F2(for)2.647 E F0 .146 -(command, and before the \214rst command e)2.647 F -.15(xe)-.15 G .146 -(cutes in a).15 F .145(shell function \(see)144 274.8 R F3 .145 -(SHELL GRAMMAR)2.645 F F0(abo)2.395 E -.15(ve)-.15 G 2.646(\). Refer).15 -F .146(to the description of the)2.646 F F1(extdeb)2.646 E(ug)-.2 E F0 -.146(option to)2.646 F(the)144 286.8 Q F1(shopt)3.201 E F0 -.2(bu)3.201 -G .7(iltin for details of its ef).2 F .7(fect on the)-.25 F F1(DEB)3.2 E -(UG)-.1 E F0 3.2(trap. If)3.2 F(a)3.2 E F2(sigspec)3.54 E F0(is)3.51 E -F3(RETURN)3.2 E F4(,)A F0 .7(the com-)2.95 F(mand)144 298.8 Q F2(ar) -3.473 E(g)-.37 E F0 .643(is e)3.363 F -.15(xe)-.15 G .643 +/F3 9/Times-Bold@0 SF(SIG)2.5 E F0(pre\214x is optional.)2.25 E 1.648 +(If a)144 238.8 R F2(sigspec)4.488 E F0(is)4.458 E F3(EXIT)4.148 E F0 +1.648(\(0\) the command)3.898 F F2(ar)4.479 E(g)-.37 E F0 1.649(is e) +4.369 F -.15(xe)-.15 G 1.649(cuted on e).15 F 1.649(xit from the shell.) +-.15 F 1.649(If a)6.649 F F2(sigspec)4.489 E F0(is)4.459 E F3(DEB)144 +250.8 Q(UG)-.09 E/F4 9/Times-Roman@0 SF(,)A F0 1.168(the command)3.418 F +F2(ar)3.998 E(g)-.37 E F0 1.168(is e)3.888 F -.15(xe)-.15 G 1.167 +(cuted before e).15 F -.15(ve)-.25 G(ry).15 E F2 1.167(simple command) +3.667 F F0(,)A F2(for)3.667 E F0(command,)3.667 E F2(case)3.667 E F0 +(com-)3.667 E(mand,)144 262.8 Q F2(select)2.646 E F0 .146(command, e) +2.646 F -.15(ve)-.25 G .146(ry arithmetic).15 F F2(for)2.646 E F0 .147 +(command, and before the \214rst command e)2.646 F -.15(xe)-.15 G .147 +(cutes in a).15 F .146(shell function \(see)144 274.8 R F3 .146 +(SHELL GRAMMAR)2.646 F F0(abo)2.396 E -.15(ve)-.15 G 2.646(\). Refer).15 +F .146(to the description of the)2.646 F F1(extdeb)2.645 E(ug)-.2 E F0 +.145(option to)2.645 F(the)144 286.8 Q F1(shopt)3.2 E F0 -.2(bu)3.2 G .7 +(iltin for details of its ef).2 F .7(fect on the)-.25 F F1(DEB)3.2 E(UG) +-.1 E F0 3.2(trap. If)3.2 F(a)3.2 E F2(sigspec)3.54 E F0(is)3.51 E F3 +(RETURN)3.2 E F4(,)A F0 .701(the com-)2.951 F(mand)144 298.8 Q F2(ar) +3.474 E(g)-.37 E F0 .644(is e)3.364 F -.15(xe)-.15 G .643 (cuted each time a shell function or a script e).15 F -.15(xe)-.15 G -.644(cuted with the).15 F F1(.)3.144 E F0(or)3.144 E F1(sour)3.144 E(ce) --.18 E F0 -.2(bu)3.144 G(iltins).2 E(\214nishes e)144 310.8 Q -.15(xe) --.15 G(cuting.).15 E .929(If a)144 328.8 R F2(sigspec)3.769 E F0(is) -3.739 E F3(ERR)3.429 E F4(,)A F0 .929(the command)3.179 F F2(ar)3.759 E +.643(cuted with the).15 F F1(.)3.143 E F0(or)3.143 E F1(sour)3.143 E(ce) +-.18 E F0 -.2(bu)3.143 G(iltins).2 E(\214nishes e)144 310.8 Q -.15(xe) +-.15 G(cuting.).15 E .928(If a)144 328.8 R F2(sigspec)3.768 E F0(is) +3.738 E F3(ERR)3.429 E F4(,)A F0 .929(the command)3.179 F F2(ar)3.759 E (g)-.37 E F0 .929(is e)3.649 F -.15(xe)-.15 G .929(cuted whene).15 F --.15(ve)-.25 G 3.429(ras).15 G .928(imple command has a non\255zero) --3.429 F -.15(ex)144 340.8 S 1.008(it status, subject to the follo).15 F +-.15(ve)-.25 G 3.429(ras).15 G .929(imple command has a non\255zero) +-3.429 F -.15(ex)144 340.8 S 1.009(it status, subject to the follo).15 F 1.009(wing conditions.)-.25 F(The)6.009 E F3(ERR)3.509 E F0 1.009 -(trap is not e)3.259 F -.15(xe)-.15 G 1.009(cuted if the f).15 F 1.009 +(trap is not e)3.259 F -.15(xe)-.15 G 1.008(cuted if the f).15 F 1.008 (ailed com-)-.1 F .324 (mand is part of the command list immediately follo)144 352.8 R .324 (wing a)-.25 F F1(while)2.824 E F0(or)2.824 E F1(until)2.824 E F0 -.1 @@ -8174,76 +8186,75 @@ E(yed by the)-.15 E F1(err)2.5 E(exit)-.18 E F0(option.)2.5 E 1.095 (Signals ignored upon entry to the shell cannot be trapped or reset.)144 394.8 R -.35(Tr)6.095 G 1.095(apped signals that are not).35 F .662 (being ignored are reset to their original v)144 406.8 R .662 -(alues in a subshell or subshell en)-.25 F .662(vironment when one is) +(alues in a subshell or subshell en)-.25 F .661(vironment when one is) -.4 F 2.5(created. The)144 418.8 R(return status is f)2.5 E(alse if an) -.1 E(y)-.15 E F2(sigspec)2.84 E F0(is in)2.81 E -.25(va)-.4 G (lid; otherwise).25 E F1(trap)2.5 E F0(returns true.)2.5 E F1(type)108 435.6 Q F0([)2.5 E F1(\255aftpP)A F0(])A F2(name)2.5 E F0([)2.5 E F2 -(name)A F0(...])2.5 E -.4(Wi)144 447.6 S .174 -(th no options, indicate ho).4 F 2.674(we)-.25 G(ach)-2.674 E F2(name) -3.034 E F0 -.1(wo)2.854 G .173 -(uld be interpreted if used as a command name.).1 F .173(If the)5.173 F -F1144 459.6 Q F0 .842(option is used,)3.342 F F1(type)3.342 E F0 +(name)A F0(...])2.5 E -.4(Wi)144 447.6 S .173 +(th no options, indicate ho).4 F 2.673(we)-.25 G(ach)-2.673 E F2(name) +3.033 E F0 -.1(wo)2.853 G .174 +(uld be interpreted if used as a command name.).1 F .174(If the)5.174 F +F1144 459.6 Q F0 .843(option is used,)3.343 F F1(type)3.343 E F0 .843(prints a string which is one of)3.343 F F2(alias)3.343 E F0(,).27 E F2 -.1(ke)3.343 G(ywor)-.2 E(d)-.37 E F0(,).77 E F2(function)3.343 E F0 -(,).24 E F2 -.2(bu)3.343 G(iltin).2 E F0 3.343(,o).24 G(r)-3.343 E F2 -(\214le)5.253 E F0(if)3.523 E F2(name)144.36 471.6 Q F0 .087 -(is an alias, shell reserv)2.767 F .087(ed w)-.15 F .087 -(ord, function, b)-.1 F .086(uiltin, or disk \214le, respecti)-.2 F -.15 -(ve)-.25 G(ly).15 E 5.086(.I)-.65 G 2.586(ft)-5.086 G(he)-2.586 E F2 -(name)2.946 E F0 .086(is not)2.766 F .118 +(,).24 E F2 -.2(bu)3.342 G(iltin).2 E F0 3.342(,o).24 G(r)-3.342 E F2 +(\214le)5.252 E F0(if)3.522 E F2(name)144.36 471.6 Q F0 .086 +(is an alias, shell reserv)2.766 F .086(ed w)-.15 F .086 +(ord, function, b)-.1 F .087(uiltin, or disk \214le, respecti)-.2 F -.15 +(ve)-.25 G(ly).15 E 5.087(.I)-.65 G 2.587(ft)-5.087 G(he)-2.587 E F2 +(name)2.947 E F0 .087(is not)2.767 F .119 (found, then nothing is printed, and an e)144 483.6 R .118 -(xit status of f)-.15 F .118(alse is returned.)-.1 F .119(If the)5.119 F -F12.619 E F0 .119(option is used,)2.619 F F1(type)2.619 E F0 .855 +(xit status of f)-.15 F .118(alse is returned.)-.1 F .118(If the)5.118 F +F12.618 E F0 .118(option is used,)2.618 F F1(type)2.618 E F0 .855 (either returns the name of the disk \214le that w)144 495.6 R .855 (ould be e)-.1 F -.15(xe)-.15 G .855(cuted if).15 F F2(name)3.715 E F0 -.855(were speci\214ed as a com-)3.535 F .64(mand name, or nothing if)144 -507.6 R/F5 10/Courier@0 SF .64(type -t name)3.14 F F0 -.1(wo)3.14 G .641 -(uld not return).1 F F2(\214le)3.141 E F0 5.641(.T).18 G(he)-5.641 E F1 -3.141 E F0 .641(option forces a)3.141 F F3 -.666(PA)3.141 G(TH) --.189 E F0 .113(search for each)144 519.6 R F2(name)2.613 E F0 2.613(,e) -C -.15(ve)-2.863 G 2.613(ni).15 G(f)-2.613 E F5 .113(type -t name)2.613 -F F0 -.1(wo)2.613 G .113(uld not return).1 F F2(\214le)2.613 E F0 5.113 -(.I).18 G 2.613(fa)-5.113 G .112(command is hashed,)-.001 F F1 -2.612 E F0(and)144 531.6 Q F13.23 E F0 .73(print the hashed v)3.23 -F .731 -(alue, which is not necessarily the \214le that appears \214rst in)-.25 -F F3 -.666(PA)3.231 G(TH)-.189 E F4(.)A F0 .731(If the)5.231 F F1 -144 543.6 Q F0 1.749(option is used,)4.249 F F1(type)4.248 E F0 1.748 -(prints all of the places that contain an e)4.248 F -.15(xe)-.15 G 1.748 -(cutable named).15 F F2(name)4.248 E F0 6.748(.T).18 G(his)-6.748 E .744 -(includes aliases and functions, if and only if the)144 555.6 R F1 -3.244 E F0 .744(option is not also used.)3.244 F .744 +.855(were speci\214ed as a com-)3.535 F .641(mand name, or nothing if) +144 507.6 R/F5 10/Courier@0 SF .641(type -t name)3.141 F F0 -.1(wo)3.141 +G .641(uld not return).1 F F2(\214le)3.14 E F0 5.64(.T).18 G(he)-5.64 E +F13.14 E F0 .64(option forces a)3.14 F F3 -.666(PA)3.14 G(TH)-.189 +E F0 .112(search for each)144 519.6 R F2(name)2.612 E F0 2.612(,e)C -.15 +(ve)-2.862 G 2.613(ni).15 G(f)-2.613 E F5 .113(type -t name)2.613 F F0 +-.1(wo)2.613 G .113(uld not return).1 F F2(\214le)2.613 E F0 5.113(.I) +.18 G 2.613(fac)-5.113 G .113(ommand is hashed,)-2.613 F F12.613 E +F0(and)144 531.6 Q F13.231 E F0 .731(print the hashed v)3.231 F +.73(alue, which is not necessarily the \214le that appears \214rst in) +-.25 F F3 -.666(PA)3.23 G(TH)-.189 E F4(.)A F0 .73(If the)5.23 F F1 +144 543.6 Q F0 1.748(option is used,)4.248 F F1(type)4.248 E F0 +1.748(prints all of the places that contain an e)4.248 F -.15(xe)-.15 G +1.748(cutable named).15 F F2(name)4.249 E F0 6.749(.T).18 G(his)-6.749 E +.744(includes aliases and functions, if and only if the)144 555.6 R F1 +3.244 E F0 .744(option is not also used.)3.244 F .743 (The table of hashed)5.744 F 1.223(commands is not consulted when using) 144 567.6 R F13.723 E F0 6.223(.T)C(he)-6.223 E F13.723 E F0 -1.223(option suppresses shell function lookup, as)3.723 F .325(with the) -144 579.6 R F1(command)2.825 E F0 -.2(bu)2.825 G(iltin.).2 E F1(type) -5.325 E F0 .325(returns true if all of the ar)2.825 F .326 -(guments are found, f)-.18 F .326(alse if an)-.1 F 2.826(ya)-.15 G .326 -(re not)-2.826 F(found.)144 591.6 Q F1(ulimit)108 608.4 Q F0([)2.5 E F1 +1.223(option suppresses shell function lookup, as)3.723 F .326(with the) +144 579.6 R F1(command)2.826 E F0 -.2(bu)2.826 G(iltin.).2 E F1(type) +5.326 E F0 .326(returns true if all of the ar)2.826 F .325 +(guments are found, f)-.18 F .325(alse if an)-.1 F 2.825(ya)-.15 G .325 +(re not)-2.825 F(found.)144 591.6 Q F1(ulimit)108 608.4 Q F0([)2.5 E F1 (\255HST)A(abcde\214lmnpqrstuvx)-.92 E F0([)2.5 E F2(limit)A F0(]])A -(Pro)144 620.4 Q .244(vides control o)-.15 F -.15(ve)-.15 G 2.744(rt).15 -G .244(he resources a)-2.744 F -.25(va)-.2 G .244 +(Pro)144 620.4 Q .243(vides control o)-.15 F -.15(ve)-.15 G 2.743(rt).15 +G .243(he resources a)-2.743 F -.25(va)-.2 G .244 (ilable to the shell and to processes started by it, on systems).25 F -.943(that allo)144 632.4 R 3.443(ws)-.25 G .943(uch control.)-3.443 F -(The)5.943 E F13.443 E F0(and)3.443 E F13.444 E F0 .944 +.944(that allo)144 632.4 R 3.444(ws)-.25 G .944(uch control.)-3.444 F +(The)5.944 E F13.444 E F0(and)3.444 E F13.444 E F0 .943 (options specify that the hard or soft limit is set for the)3.444 F(gi) -144 644.4 Q -.15(ve)-.25 G 2.709(nr).15 G 2.709(esource. A)-2.709 F .208 +144 644.4 Q -.15(ve)-.25 G 2.708(nr).15 G 2.708(esource. A)-2.708 F .208 (hard limit cannot be increased by a non-root user once it is set; a so\ -ft limit may)2.709 F .425(be increased up to the v)144 656.4 R .425 -(alue of the hard limit.)-.25 F .426(If neither)5.425 F F12.926 E -F0(nor)2.926 E F12.926 E F0 .426 -(is speci\214ed, both the soft and)2.926 F .139(hard limits are set.)144 +ft limit may)2.708 F .426(be increased up to the v)144 656.4 R .426 +(alue of the hard limit.)-.25 F .425(If neither)5.426 F F12.925 E +F0(nor)2.925 E F12.925 E F0 .425 +(is speci\214ed, both the soft and)2.925 F .139(hard limits are set.)144 668.4 R .139(The v)5.139 F .139(alue of)-.25 F F2(limit)2.729 E F0 .139 (can be a number in the unit speci\214ed for the resource or one)3.319 F -.741(of the special v)144 680.4 R(alues)-.25 E F1(hard)3.241 E F0(,)A F1 +.742(of the special v)144 680.4 R(alues)-.25 E F1(hard)3.242 E F0(,)A F1 (soft)3.241 E F0 3.241(,o)C(r)-3.241 E F1(unlimited)3.241 E F0 3.241(,w) C .741(hich stand for the current hard limit, the current)-3.241 F .78 (soft limit, and no limit, respecti)144 692.4 R -.15(ve)-.25 G(ly).15 E 5.78(.I)-.65 G(f)-5.78 E F2(limit)3.37 E F0 .78 (is omitted, the current v)3.96 F .78(alue of the soft limit of the)-.25 -F .498(resource is printed, unless the)144 704.4 R F12.999 E F0 -.499(option is gi)2.999 F -.15(ve)-.25 G 2.999(n. When).15 F .499 +F .499(resource is printed, unless the)144 704.4 R F12.999 E F0 +.499(option is gi)2.999 F -.15(ve)-.25 G 2.999(n. When).15 F .498 (more than one resource is speci\214ed, the)2.999 F (limit name and unit are printed before the v)144 716.4 Q 2.5 (alue. Other)-.25 F(options are interpreted as follo)2.5 E(ws:)-.25 E @@ -8267,8 +8278,8 @@ E F1144 156 Q F0(The maximum number of pending signals)27.52 E F1 (The maximum resident set size \(man)21.97 E 2.5(ys)-.15 G (ystems do not honor this limit\))-2.5 E F1144 192 Q F0 .791(The \ maximum number of open \214le descriptors \(most systems do not allo) -24.74 F 3.29(wt)-.25 G .79(his v)-3.29 F .79(alue to)-.25 F(be set\))180 -204 Q F1144 216 Q F0 +24.74 F 3.291(wt)-.25 G .791(his v)-3.291 F .791(alue to)-.25 F +(be set\))180 204 Q F1144 216 Q F0 (The pipe size in 512-byte blocks \(this may not be set\))24.74 E F1 144 228 Q F0(The maximum number of bytes in POSIX message queues) 24.74 E F1144 240 Q F0(The maximum real-time scheduling priority) @@ -8284,15 +8295,15 @@ Q F1144 312 Q F0(The maximum number of \214le locks)25.3 E F1 -.25 G .468(n, and the).15 F F12.968 E F0 .468 (option is not used,)2.968 F F2(limit)2.968 E F0 .468(is the ne)2.968 F 2.968(wv)-.25 G .468(alue of the speci\214ed resource.)-3.218 F(If)5.468 -E .044(no option is gi)144 352.8 R -.15(ve)-.25 G .044(n, then).15 F F1 -2.544 E F0 .045(is assumed.)2.545 F -1.11(Va)5.045 G .045 -(lues are in 1024-byte increments, e)1.11 F .045(xcept for)-.15 F F1 -2.545 E F0 2.545(,w)C .045(hich is)-2.545 F .403(in seconds;)144 -364.8 R F12.903 E F0 2.903(,w)C .402 -(hich is in units of 512-byte blocks; and)-2.903 F F12.902 E F0(,) +E .045(no option is gi)144 352.8 R -.15(ve)-.25 G .045(n, then).15 F F1 +2.545 E F0 .045(is assumed.)2.545 F -1.11(Va)5.045 G .045 +(lues are in 1024-byte increments, e)1.11 F .044(xcept for)-.15 F F1 +2.544 E F0 2.544(,w)C .044(hich is)-2.544 F .402(in seconds;)144 +364.8 R F12.902 E F0 2.902(,w)C .402 +(hich is in units of 512-byte blocks; and)-2.902 F F12.902 E F0(,) A F12.902 E F0(,)A F12.902 E F0 2.902(,a)C(nd)-2.902 E F1 -2.902 E F0 2.902(,w)C .402(hich are unscaled)-2.902 F -.25(va)144 -376.8 S 3.082(lues. The).25 F .583(return status is 0 unless an in)3.083 +2.903 E F0 2.903(,w)C .403(hich are unscaled)-2.903 F -.25(va)144 +376.8 S 3.083(lues. The).25 F .583(return status is 0 unless an in)3.083 F -.25(va)-.4 G .583(lid option or ar).25 F .583 (gument is supplied, or an error occurs)-.18 F(while setting a ne)144 388.8 Q 2.5(wl)-.25 G(imit.)-2.5 E F1(umask)108 405.6 Q F0([)2.5 E F1 @@ -8302,15 +8313,15 @@ F -.25(va)-.4 G .583(lid option or ar).25 F .583 (gins with a digit, it is interpreted as an octal)-.15 F .066(number; o\ therwise it is interpreted as a symbolic mode mask similar to that acce\ pted by)144 429.6 R F2 -.15(ch)2.566 G(mod).15 E F0(\(1\).).77 E(If)144 -441.6 Q F2(mode)3.263 E F0 .382(is omitted, the current v)3.063 F .382 +441.6 Q F2(mode)3.262 E F0 .382(is omitted, the current v)3.062 F .382 (alue of the mask is printed.)-.25 F(The)5.382 E F12.882 E F0 .382 (option causes the mask to be)2.882 F .547 (printed in symbolic form; the def)144 453.6 R .547 (ault output is an octal number)-.1 F 5.547(.I)-.55 G 3.047(ft)-5.547 G (he)-3.047 E F13.047 E F0 .547(option is supplied, and)3.047 F F2 -(mode)144.38 465.6 Q F0 .552 -(is omitted, the output is in a form that may be reused as input.)3.232 -F .551(The return status is 0 if the)5.551 F(mode w)144 477.6 Q +(mode)144.38 465.6 Q F0 .551 +(is omitted, the output is in a form that may be reused as input.)3.231 +F .552(The return status is 0 if the)5.552 F(mode w)144 477.6 Q (as successfully changed or if no)-.1 E F2(mode)2.5 E F0(ar)2.5 E (gument w)-.18 E(as supplied, and f)-.1 E(alse otherwise.)-.1 E F1 (unalias)108 494.4 Q F0<5bad>2.5 E F1(a)A F0 2.5(][)C F2(name)-2.5 E F0 @@ -8320,45 +8331,45 @@ F14.155 E F0 1.655(is supplied, all alias de\214nitions are)4.155 F(remo)144 518.4 Q -.15(ve)-.15 G 2.5(d. The).15 F(return v)2.5 E (alue is true unless a supplied)-.25 E F2(name)2.86 E F0 (is not a de\214ned alias.)2.68 E F1(unset)108 535.2 Q F0<5bad>2.5 E F1 -(fv)A F0 2.5(][)C F2(name)-2.5 E F0(...])2.5 E -.15(Fo)144 547.2 S 3.828 -(re).15 G(ach)-3.828 E F2(name)3.828 E F0 3.828(,r).18 G(emo)-3.828 E -1.628 -.15(ve t)-.15 H 1.328(he corresponding v).15 F 1.327 -(ariable or function.)-.25 F 1.327(If the)6.327 F F13.827 E F0 -1.327(option is gi)3.827 F -.15(ve)-.25 G 1.327(n, each).15 F F2(name) -144.36 559.2 Q F0 1.55(refers to a shell v)4.23 F 1.551 +(fv)A F0 2.5(][)C F2(name)-2.5 E F0(...])2.5 E -.15(Fo)144 547.2 S 3.827 +(re).15 G(ach)-3.827 E F2(name)3.827 E F0 3.827(,r).18 G(emo)-3.827 E +1.627 -.15(ve t)-.15 H 1.327(he corresponding v).15 F 1.327 +(ariable or function.)-.25 F 1.327(If the)6.327 F F13.828 E F0 +1.328(option is gi)3.828 F -.15(ve)-.25 G 1.328(n, each).15 F F2(name) +144.36 559.2 Q F0 1.551(refers to a shell v)4.231 F 1.551 (ariable, and that v)-.25 F 1.551(ariable is remo)-.25 F -.15(ve)-.15 G -4.051(d. Read-only).15 F -.25(va)4.051 G 1.551(riables may not be).25 F -4.642(unset. If)144 571.2 R F14.642 E F0 2.142 -(is speci\214ed, each)4.642 F F2(name)5.001 E F0 2.141 +4.05(d. Read-only).15 F -.25(va)4.05 G 1.55(riables may not be).25 F +4.641(unset. If)144 571.2 R F14.641 E F0 2.141 +(is speci\214ed, each)4.641 F F2(name)5.001 E F0 2.141 (refers to a shell function, and the function de\214nition is)4.821 F -(remo)144 583.2 Q -.15(ve)-.15 G 2.898(d. If).15 F .398 -(no options are supplied, each)2.898 F F2(name)2.898 E F0 .398 -(refers to a v)2.898 F .399(ariable; if there is no v)-.25 F .399 -(ariable by that)-.25 F .579(name, an)144 595.2 R 3.079(yf)-.15 G .579 -(unction with that name is unset.)-3.079 F .579(Each unset v)5.579 F -.579(ariable or function is remo)-.25 F -.15(ve)-.15 G 3.078(df).15 G -.578(rom the)-3.078 F(en)144 607.2 Q .045 +(remo)144 583.2 Q -.15(ve)-.15 G 2.899(d. 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