/* variables.c -- Functions for hacking shell variables. */
-/* Copyright (C) 1987-2004 Free Software Foundation, Inc.
+/* Copyright (C) 1987-2005 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
#include "posixtime.h"
#if defined (qnx)
-# include <sys/vc.h>
-#endif
+# if defined (qnx6)
+# include <sy/netmgr.h>
+# else
+# include <sys/vc.h>
+# endif /* !qnx6 */
+#endif /* qnx */
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#define ifsname(s) ((s)[0] == 'I' && (s)[1] == 'F' && (s)[2] == 'S' && (s)[3] == '\0')
+extern char **environ;
+
/* Variables used here and defined in other files. */
extern int posixly_correct;
extern int line_number;
extern time_t shell_start_time;
#if defined (READLINE)
+extern int no_line_editing;
extern int perform_hostname_completion;
#endif
static int export_env_index;
static int export_env_size;
+#if defined (READLINE)
+static int winsize_assignment; /* currently assigning to LINES or COLUMNS */
+static int winsize_assigned; /* assigned to LINES or COLUMNS */
+#endif
+
/* Non-zero means that we have to remake EXPORT_ENV. */
int array_needs_making = 1;
static SHELL_VAR *hash_lookup __P((const char *, HASH_TABLE *));
static SHELL_VAR *new_shell_variable __P((const char *));
static SHELL_VAR *make_new_variable __P((const char *, HASH_TABLE *));
-static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int));
+static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int, int));
static void free_variable_hash_data __P((PTR_T));
#if defined (ARRAY_VARS)
# if 0
/* Array variables may not yet be exported. */
- else if (*string == '(' && string[1] == '[' && xstrchr (string, ')'))
+ else if (*string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')')
{
string_length = 1;
temp_string = extract_array_assignment_list (string, &string_length);
#endif
else
{
- temp_var = bind_variable (name, string);
+ temp_var = bind_variable (name, string, 0);
VSETATTR (temp_var, (att_exported | att_imported));
array_needs_making = 1;
}
set_pwd ();
/* Set up initial value of $_ */
- temp_var = bind_variable ("_", dollar_vars[0]);
+#if 0
+ temp_var = bind_variable ("_", dollar_vars[0], 0);
+#else
+ temp_var = set_if_not ("_", dollar_vars[0]);
+#endif
/* Remember this pid. */
dollar_dollar_pid = getpid ();
/* set node id -- don't import it from the environment */
{
char node_name[22];
+# if defined (qnx6)
+ netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name));
+# else
qnx_nidtostr (getnid (), node_name, sizeof (node_name));
- temp_var = bind_variable ("NODE", node_name);
+# endif
+ temp_var = bind_variable ("NODE", node_name, 0);
set_auto_export (temp_var);
}
#endif
set_if_not ("PS4", "+ ");
/* Don't allow IFS to be imported from the environment. */
- temp_var = bind_variable ("IFS", " \t\n");
+ temp_var = bind_variable ("IFS", " \t\n", 0);
setifs (temp_var);
/* Magic machine types. Pretty convenient. */
names a mail file if MAILPATH is not set, and we should provide a
default only if neither is set. */
if (interactive_shell)
- set_if_not ("MAILCHECK", posixly_correct ? "600" : "60");
+ {
+ temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60");
+ VSETATTR (temp_var, att_integer);
+ }
/* Do some things with shell level. */
initialize_shell_level ();
set_ppid ();
/* Initialize the `getopts' stuff. */
- bind_variable ("OPTIND", "1");
+ temp_var = bind_variable ("OPTIND", "1", 0);
+ VSETATTR (temp_var, att_integer);
getopts_reset (0);
- bind_variable ("OPTERR", "1");
+ bind_variable ("OPTERR", "1", 0);
sh_opterr = 1;
if (login_shell == 1)
/* Get the full pathname to THIS shell, and set the BASH variable
to it. */
name = get_bash_name ();
- temp_var = bind_variable ("BASH", name);
+ temp_var = bind_variable ("BASH", name, 0);
free (name);
/* Make the exported environment variable SHELL be the user's login
set_shell_var ();
/* Make a variable called BASH_VERSION which contains the version info. */
- bind_variable ("BASH_VERSION", shell_version_string ());
+ bind_variable ("BASH_VERSION", shell_version_string (), 0);
#if defined (ARRAY_VARS)
make_vers_array ();
#endif
if (command_execution_string)
- bind_variable ("BASH_EXECUTION_STRING", command_execution_string);
+ bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0);
/* Find out if we're supposed to be in Posix.2 mode via an
environment variable. */
}
#endif /* HISTORY */
+#if defined (READLINE) && defined (STRICT_POSIX)
+ /* POSIXLY_CORRECT will only be 1 here if the shell was compiled
+ -DSTRICT_POSIX */
+ if (interactive_shell && posixly_correct && no_line_editing == 0)
+ rl_prefer_env_winsize = 1;
+#endif /* READLINE && STRICT_POSIX */
+
/*
* 24 October 2001
*
temp_var = find_variable ("HOME");
if (temp_var == 0)
- temp_var = bind_variable ("HOME", sh_get_home_dir ());
+ temp_var = bind_variable ("HOME", sh_get_home_dir (), 0);
#if 0
VSETATTR (temp_var, att_exported);
#endif
{
if (current_user.shell == 0)
get_current_user_info ();
- temp_var = bind_variable ("SHELL", current_user.shell);
+ temp_var = bind_variable ("SHELL", current_user.shell, 0);
}
#if 0
VSETATTR (temp_var, att_exported);
new_level[3] = '\0';
}
- temp_var = bind_variable ("SHLVL", new_level);
+ temp_var = bind_variable ("SHLVL", new_level, 0);
set_auto_export (temp_var);
}
same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL))
{
set_working_directory (home_string);
- temp_var = bind_variable ("PWD", home_string);
+ temp_var = bind_variable ("PWD", home_string, 0);
set_auto_export (temp_var);
}
else
temp_string = get_working_directory ("shell-init");
if (temp_string)
{
- temp_var = bind_variable ("PWD", temp_string);
+ temp_var = bind_variable ("PWD", temp_string, 0);
set_auto_export (temp_var);
free (temp_string);
}
/* According to the Single Unix Specification, v2, $OLDPWD is an
`environment variable' and therefore should be auto-exported.
Make a dummy invisible variable for OLDPWD, and mark it as exported. */
- temp_var = bind_variable ("OLDPWD", (char *)NULL);
+ temp_var = bind_variable ("OLDPWD", (char *)NULL, 0);
VSETATTR (temp_var, (att_exported | att_invisible));
}
temp_var = find_variable ("PPID");
if (temp_var)
VUNSETATTR (temp_var, (att_readonly | att_exported));
- temp_var = bind_variable ("PPID", name);
+ temp_var = bind_variable ("PPID", name, 0);
VSETATTR (temp_var, (att_readonly | att_integer));
}
v = find_variable ("UID");
if (v == 0)
{
- v = bind_variable ("UID", b);
+ v = bind_variable ("UID", b, 0);
VSETATTR (v, (att_readonly | att_integer));
}
v = find_variable ("EUID");
if (v == 0)
{
- v = bind_variable ("EUID", b);
+ v = bind_variable ("EUID", b, 0);
VSETATTR (v, (att_readonly | att_integer));
}
}
{
char val[INT_STRLEN_BOUND(int) + 1], *v;
+ /* If we are currently assigning to LINES or COLUMNS, don't do anything. */
+ if (winsize_assignment)
+ return;
+
v = inttostr (lines, val, sizeof (val));
- bind_variable ("LINES", v);
+ bind_variable ("LINES", v, 0);
v = inttostr (cols, val, sizeof (val));
- bind_variable ("COLUMNS", v);
+ bind_variable ("COLUMNS", v, 0);
}
/* **************************************************************** */
#define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \
do \
{ \
- v = bind_variable (var, (val)); \
+ v = bind_variable (var, (val), 0); \
v->dynamic_value = gfunc; \
v->assign_func = afunc; \
} \
/* The random number seed. You can change this by setting RANDOM. */
static unsigned long rseed = 1;
static int last_random_value;
+static int seeded_subshell = 0;
/* A linear congruential random number generator based on the example
one in the ANSI C standard. This one isn't very good, but a more
arrayind_t unused;
{
sbrand (strtoul (value, (char **)NULL, 10));
+ if (subshell_environment)
+ seeded_subshell = 1;
return (self);
}
int rv;
/* Reset for command and process substitution. */
- if (subshell_environment)
- sbrand (rseed + getpid() + NOW);
+ if (subshell_environment && seeded_subshell == 0)
+ {
+ sbrand (rseed + getpid() + NOW);
+ seeded_subshell = 1;
+ }
do
rv = brand ();
{
char *p;
- p = savestring (the_printed_command_except_trap);
+
+ if (the_printed_command_except_trap)
+ p = savestring (the_printed_command_except_trap);
+ else
+ {
+ p = (char *)xmalloc (1);
+ p[0] = '\0';
+ }
FREE (value_cell (var));
var_setvalue (var, p);
return (var);
INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell);
INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random);
+ VSETATTR (v, att_integer);
INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno);
+ VSETATTR (v, att_integer);
#if defined (HISTORY)
INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL);
+ VSETATTR (v, att_integer);
#endif
#if defined (READLINE)
v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign);
# if defined (DEBUGGER)
- v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign);
- v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign);
+ v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign|att_nounset);
+ v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign|att_nounset);
# endif /* DEBUGGER */
- v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign);
- v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign);
+ v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset);
+ v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset);
#endif
v = init_funcname_var ();
v = find_variable (name);
if (v == 0)
- v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH);
+ v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0);
return (v);
}
}
if (old_var == 0)
- new_var = bind_variable_internal (name, "", vc->table, HASH_NOSRCH);
+ new_var = bind_variable_internal (name, "", vc->table, HASH_NOSRCH, 0);
else
{
new_var = make_new_variable (name, vc->table);
#endif
char *
-make_variable_value (var, value)
+make_variable_value (var, value, flags)
SHELL_VAR *var;
char *value;
+ int flags;
{
- char *retval;
- intmax_t lval;
- int expok;
+ char *retval, *oval;
+ intmax_t lval, rval;
+ int expok, olen;
/* If this variable has had its type set to integer (via `declare -i'),
then do expression evaluation on it and store the result. The
evaluation done. */
if (integer_p (var))
{
- lval = evalexp (value, &expok);
+ if (flags & ASS_APPEND)
+ {
+ oval = value_cell (var);
+ lval = evalexp (oval, &expok); /* ksh93 seems to do this */
+ if (expok == 0)
+ jump_to_top_level (DISCARD);
+ }
+ rval = evalexp (value, &expok);
if (expok == 0)
jump_to_top_level (DISCARD);
- retval = itos (lval);
+ if (flags & ASS_APPEND)
+ rval += lval;
+ retval = itos (rval);
}
else if (value)
{
- if (*value)
+ if (flags & ASS_APPEND)
+ {
+ oval = get_variable_value (var);
+ if (oval == 0) /* paranoia */
+ oval = "";
+ olen = STRLEN (oval);
+ retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
+ strcpy (retval, oval);
+ if (value)
+ strcpy (retval+olen, value);
+ }
+ else if (*value)
retval = savestring (value);
else
{
/* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the
temporary environment (but usually is not). */
static SHELL_VAR *
-bind_variable_internal (name, value, table, hflags)
+bind_variable_internal (name, value, table, hflags, aflags)
const char *name;
char *value;
HASH_TABLE *table;
- int hflags;
+ int hflags, aflags;
{
char *newval;
SHELL_VAR *entry;
if (entry == 0)
{
entry = make_new_variable (name, table);
- var_setvalue (entry, make_variable_value (entry, value));
+ var_setvalue (entry, make_variable_value (entry, value, 0)); /* XXX */
}
else if (entry->assign_func) /* array vars have assign functions now */
{
INVALIDATE_EXPORTSTR (entry);
- return ((*(entry->assign_func)) (entry, value, -1));
+ newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : value;
+ entry = (*(entry->assign_func)) (entry, newval, -1);
+ if (newval != value)
+ free (newval);
+ return (entry);
}
else
{
/* Variables which are bound are visible. */
VUNSETATTR (entry, att_invisible);
- newval = make_variable_value (entry, value);
+ newval = make_variable_value (entry, value, aflags); /* XXX */
/* Invalidate any cached export string */
INVALIDATE_EXPORTSTR (entry);
first, then we bind into shell_variables. */
SHELL_VAR *
-bind_variable (name, value)
+bind_variable (name, value, flags)
const char *name;
char *value;
+ int flags;
{
SHELL_VAR *v;
VAR_CONTEXT *vc;
{
v = hash_lookup (name, vc->table);
if (v)
- return (bind_variable_internal (name, value, vc->table, 0));
+ return (bind_variable_internal (name, value, vc->table, 0, flags));
}
}
- return (bind_variable_internal (name, value, global_variables->table, 0));
+ return (bind_variable_internal (name, value, global_variables->table, 0, flags));
}
/* Make VAR, a simple shell variable, have value VALUE. Once assigned a
all modified variables should be exported, mark the variable for export
and note that the export environment needs to be recreated. */
SHELL_VAR *
-bind_variable_value (var, value)
+bind_variable_value (var, value, aflags)
SHELL_VAR *var;
char *value;
+ int aflags;
{
char *t;
VUNSETATTR (var, att_invisible);
- t = make_variable_value (var, value);
- FREE (value_cell (var));
- var_setvalue (var, t);
+ if (var->assign_func)
+ {
+ /* If we're appending, we need the old value, so use
+ make_variable_value */
+ t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value;
+ (*(var->assign_func)) (var, t, -1);
+ if (t != value && t)
+ free (t);
+ }
+ else
+ {
+ t = make_variable_value (var, value, aflags);
+ FREE (value_cell (var));
+ var_setvalue (var, t);
+ }
INVALIDATE_EXPORTSTR (var);
#if defined (ARRAY_VARS)
if (isarr)
- v = assign_array_element (lhs, rhs);
+ v = assign_array_element (lhs, rhs, 0);
else
#endif
- v = bind_variable (lhs, rhs);
+ v = bind_variable (lhs, rhs, 0);
if (isint)
VSETATTR (v, att_integer);
responsible for moving the main temporary env to one of the other
temporary environments. The expansion code in subst.c calls this. */
int
-assign_in_env (string)
- const char *string;
+assign_in_env (word)
+ WORD_DESC *word;
{
int offset;
char *name, *temp, *value;
SHELL_VAR *var;
+ const char *string;
+
+ string = word->word;
offset = assignment (string, 0);
name = savestring (string);
{
name[offset] = 0;
+ /* ignore the `+' when assigning temporary environment */
+ if (name[offset - 1] == '+')
+ name[offset - 1] = '\0';
+
var = find_variable (name);
if (var && (readonly_p (var) || noassign_p (var)))
{
}
temp = name + offset + 1;
+#if 0
temp = (xstrchr (temp, '~') != 0) ? bash_tilde_expand (temp, 1) : savestring (temp);
-
value = expand_string_unsplit_to_string (temp, 0);
free (temp);
+#else
+ value = expand_assignment_string_to_string (temp, 0);
+#endif
}
if (temporary_env == 0)
We also need to add it back into the correct hash table. */
if (old_var && local_p (old_var) && variable_context == old_var->context)
{
+#if defined (ARRAY_VARS)
+ if (array_p (old_var))
+ array_dispose (array_cell (old_var));
+ else
+#endif
+ FREE (value_cell (old_var));
/* Reset the attributes. Preserve the export attribute if the variable
came from a temporary environment. Make sure it stays local, and
make it invisible. */
old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0;
VSETATTR (old_var, att_local);
VSETATTR (old_var, att_invisible);
- FREE (value_cell (old_var));
var_setvalue (old_var, (char *)NULL);
INVALIDATE_EXPORTSTR (old_var);
entry = find_variable (name); \
if (!entry) \
{ \
- entry = bind_variable (name, ""); \
+ entry = bind_variable (name, "", 0); \
if (!no_invisible_vars) entry->attributes |= att_invisible; \
} \
} \
binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS);
}
- v = bind_variable_internal (var->name, value_cell (var), binding_table, 0);
+ v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, 0);
/* XXX - should we set the context here? It shouldn't matter because of how
assign_in_env works, but might want to check. */
{ \
export_env_size += 16; \
export_env = strvec_resize (export_env, export_env_size); \
+ environ = export_env; \
} \
export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \
export_env[export_env_index] = (char *)NULL; \
{
export_env_size = new_size;
export_env = strvec_resize (export_env, export_env_size);
+ environ = export_env;
}
export_env[export_env_index = 0] = (char *)NULL;
if (tempvar_p (var) && (posixly_correct || (var->attributes & att_propagate)))
{
/* XXX - should we set v->context here? */
- v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0);
+ v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
if (shell_variables == global_variables)
var->attributes &= ~(att_tempvar|att_propagate);
else
/* If a temp var had its export attribute set, or it's marked to be
propagated, bind it in the previous scope before disposing it. */
+ /* XXX - This isn't exactly right, because all tempenv variables have the
+ export attribute set. */
+#if 0
if (exported_p (var) || (var->attributes & att_propagate))
+#else
+ if (tempvar_p (var) && exported_p (var) && (var->attributes & att_propagate))
+#endif
{
var->attributes &= ~att_tempvar; /* XXX */
- v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0);
+ v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
if (shell_variables == global_variables)
var->attributes &= ~att_propagate;
v->attributes |= var->attributes;
extern int eof_encountered, eof_encountered_limit, ignoreeof;
#if defined (READLINE)
-extern int no_line_editing;
extern int hostname_list_initialized;
#endif
};
static struct name_and_function special_vars[] = {
+#if defined (READLINE)
+# if defined (STRICT_POSIX)
+ { "COLUMNS", sv_winsize },
+# endif
+ { "COMP_WORDBREAKS", sv_comp_wordbreaks },
+#endif
+
{ "GLOBIGNORE", sv_globignore },
#if defined (HISTORY)
{ "HISTTIMEFORMAT", sv_histtimefmt },
#endif
+#if defined (__CYGWIN__)
+ { "HOME", sv_home },
+#endif
+
#if defined (READLINE)
{ "HOSTFILE", sv_hostfile },
#endif
{ "LC_CTYPE", sv_locale },
{ "LC_MESSAGES", sv_locale },
{ "LC_NUMERIC", sv_locale },
+ { "LC_TIME", sv_locale },
+
+#if defined (READLINE) && defined (STRICT_POSIX)
+ { "LINES", sv_winsize },
+#endif
{ "MAIL", sv_mail },
{ "MAILCHECK", sv_mail },
}
#if defined (READLINE)
+void
+sv_comp_wordbreaks (name)
+ char *name;
+{
+ SHELL_VAR *sv;
+
+ sv = find_variable (name);
+ if (sv == 0)
+ rl_completer_word_break_characters = (char *)NULL;
+}
+
/* What to do just after one of the TERMxxx variables has changed.
If we are an interactive shell, then try to reset the terminal
information in readline. */
else
hostname_list_initialized = 0;
}
+
+#if defined (STRICT_POSIX)
+/* In strict posix mode, we allow assignments to LINES and COLUMNS (and values
+ found in the initial environment) to override the terminal size reported by
+ the kernel. */
+void
+sv_winsize (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ intmax_t xd;
+ int d;
+
+ if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing)
+ return;
+
+ v = find_variable (name);
+ if (v == 0 || var_isnull (v))
+ rl_reset_screen_size ();
+ else
+ {
+ if (legal_number (value_cell (v), &xd) == 0)
+ return;
+ winsize_assignment = winsize_assigned = 1;
+ d = xd; /* truncate */
+ if (name[0] == 'L') /* LINES */
+ rl_set_screen_size (d, -1);
+ else /* COLUMNS */
+ rl_set_screen_size (-1, d);
+ winsize_assignment = 0;
+ }
+}
+#endif /* STRICT_POSIX */
#endif /* READLINE */
+/* Update the value of HOME in the export environment so tilde expansion will
+ work on cygwin. */
+#if defined (__CYGWIN__)
+sv_home (name)
+ char *name;
+{
+ array_needs_making = 1;
+ maybe_make_export_env ();
+}
+#endif
+
#if defined (HISTORY)
/* What to do after the HISTSIZE or HISTFILESIZE variables change.
If there is a value for this HISTSIZE (and it is numeric), then stifle
{
char *temp;
intmax_t num;
+ int hmax;
temp = get_string_value (name);
{
if (name[4] == 'S')
{
- stifle_history (num);
+ hmax = num;
+ stifle_history (hmax);
num = where_history ();
if (history_lines_this_session > num)
history_lines_this_session = num;
projects / thirdparty / bash.git / blobdiff