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Commit | Line | Data |
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cc87ba64 CR |
1 | /* subst.c -- The part of the shell that does parameter, command, arithmetic, |
2 | and globbing substitutions. */ | |
726f6388 | 3 | |
bb70624e JA |
4 | /* ``Have a little faith, there's magic in the night. You ain't a |
5 | beauty, but, hey, you're alright.'' */ | |
6 | ||
73a146be | 7 | /* Copyright (C) 1987-2013 Free Software Foundation, Inc. |
726f6388 JA |
8 | |
9 | This file is part of GNU Bash, the Bourne Again SHell. | |
10 | ||
2e4498b3 CR |
11 | Bash is free software: you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation, either version 3 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | Bash is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
23 | */ | |
726f6388 | 24 | |
ccc6cda3 JA |
25 | #include "config.h" |
26 | ||
726f6388 JA |
27 | #include "bashtypes.h" |
28 | #include <stdio.h> | |
f73dda09 | 29 | #include "chartypes.h" |
e77a3058 CR |
30 | #if defined (HAVE_PWD_H) |
31 | # include <pwd.h> | |
32 | #endif | |
726f6388 JA |
33 | #include <signal.h> |
34 | #include <errno.h> | |
ccc6cda3 JA |
35 | |
36 | #if defined (HAVE_UNISTD_H) | |
37 | # include <unistd.h> | |
38 | #endif | |
726f6388 JA |
39 | |
40 | #include "bashansi.h" | |
41 | #include "posixstat.h" | |
5e13499c | 42 | #include "bashintl.h" |
726f6388 JA |
43 | |
44 | #include "shell.h" | |
9e51a74d | 45 | #include "parser.h" |
726f6388 JA |
46 | #include "flags.h" |
47 | #include "jobs.h" | |
48 | #include "execute_cmd.h" | |
49 | #include "filecntl.h" | |
ccc6cda3 JA |
50 | #include "trap.h" |
51 | #include "pathexp.h" | |
52 | #include "mailcheck.h" | |
53 | ||
7117c2d2 | 54 | #include "shmbutil.h" |
06dff54a | 55 | #include "typemax.h" |
7117c2d2 | 56 | |
ccc6cda3 JA |
57 | #include "builtins/getopt.h" |
58 | #include "builtins/common.h" | |
726f6388 | 59 | |
48ff5447 CR |
60 | #include "builtins/builtext.h" |
61 | ||
cce855bc | 62 | #include <tilde/tilde.h> |
f73dda09 | 63 | #include <glob/strmatch.h> |
ccc6cda3 JA |
64 | |
65 | #if !defined (errno) | |
66 | extern int errno; | |
67 | #endif /* !errno */ | |
726f6388 JA |
68 | |
69 | /* The size that strings change by. */ | |
d166f048 | 70 | #define DEFAULT_INITIAL_ARRAY_SIZE 112 |
ccc6cda3 JA |
71 | #define DEFAULT_ARRAY_SIZE 128 |
72 | ||
73 | /* Variable types. */ | |
74 | #define VT_VARIABLE 0 | |
75 | #define VT_POSPARMS 1 | |
76 | #define VT_ARRAYVAR 2 | |
d166f048 | 77 | #define VT_ARRAYMEMBER 3 |
e33f2203 | 78 | #define VT_ASSOCVAR 4 |
726f6388 | 79 | |
d3a24ed2 CR |
80 | #define VT_STARSUB 128 /* $* or ${array[*]} -- used to split */ |
81 | ||
ccc6cda3 JA |
82 | /* Flags for quoted_strchr */ |
83 | #define ST_BACKSL 0x01 | |
84 | #define ST_CTLESC 0x02 | |
7117c2d2 JA |
85 | #define ST_SQUOTE 0x04 /* unused yet */ |
86 | #define ST_DQUOTE 0x08 /* unused yet */ | |
87 | ||
d3a24ed2 CR |
88 | /* Flags for the `pflags' argument to param_expand() */ |
89 | #define PF_NOCOMSUB 0x01 /* Do not perform command substitution */ | |
1231ac47 | 90 | #define PF_IGNUNBOUND 0x02 /* ignore unbound vars even if -u set */ |
e1e48bba | 91 | #define PF_NOSPLIT2 0x04 /* same as W_NOSPLIT2 */ |
40647963 | 92 | #define PF_ASSIGNRHS 0x08 /* same as W_ASSIGNRHS */ |
d3a24ed2 | 93 | |
cce855bc JA |
94 | /* These defs make it easier to use the editor. */ |
95 | #define LBRACE '{' | |
96 | #define RBRACE '}' | |
97 | #define LPAREN '(' | |
98 | #define RPAREN ')' | |
726f6388 | 99 | |
176b12ee CR |
100 | #if defined (HANDLE_MULTIBYTE) |
101 | #define WLPAREN L'(' | |
102 | #define WRPAREN L')' | |
103 | #endif | |
104 | ||
28ef6c31 JA |
105 | /* Evaluates to 1 if C is one of the shell's special parameters whose length |
106 | can be taken, but is also one of the special expansion characters. */ | |
107 | #define VALID_SPECIAL_LENGTH_PARAM(c) \ | |
108 | ((c) == '-' || (c) == '?' || (c) == '#') | |
109 | ||
110 | /* Evaluates to 1 if C is one of the shell's special parameters for which an | |
111 | indirect variable reference may be made. */ | |
112 | #define VALID_INDIR_PARAM(c) \ | |
e05be32d | 113 | ((posixly_correct == 0 && (c) == '#') || (posixly_correct == 0 && (c) == '?') || (c) == '@' || (c) == '*') |
28ef6c31 JA |
114 | |
115 | /* Evaluates to 1 if C is one of the OP characters that follows the parameter | |
116 | in ${parameter[:]OPword}. */ | |
7117c2d2 | 117 | #define VALID_PARAM_EXPAND_CHAR(c) (sh_syntaxtab[(unsigned char)c] & CSUBSTOP) |
28ef6c31 | 118 | |
bb70624e JA |
119 | /* Evaluates to 1 if this is one of the shell's special variables. */ |
120 | #define SPECIAL_VAR(name, wi) \ | |
f73dda09 JA |
121 | ((DIGIT (*name) && all_digits (name)) || \ |
122 | (name[1] == '\0' && (sh_syntaxtab[(unsigned char)*name] & CSPECVAR)) || \ | |
28ef6c31 | 123 | (wi && name[2] == '\0' && VALID_INDIR_PARAM (name[1]))) |
bb70624e | 124 | |
f73dda09 JA |
125 | /* An expansion function that takes a string and a quoted flag and returns |
126 | a WORD_LIST *. Used as the type of the third argument to | |
127 | expand_string_if_necessary(). */ | |
128 | typedef WORD_LIST *EXPFUNC __P((char *, int)); | |
129 | ||
726f6388 JA |
130 | /* Process ID of the last command executed within command substitution. */ |
131 | pid_t last_command_subst_pid = NO_PID; | |
b72432fd | 132 | pid_t current_command_subst_pid = NO_PID; |
726f6388 | 133 | |
7117c2d2 JA |
134 | /* Variables used to keep track of the characters in IFS. */ |
135 | SHELL_VAR *ifs_var; | |
136 | char *ifs_value; | |
137 | unsigned char ifs_cmap[UCHAR_MAX + 1]; | |
f0c4de40 | 138 | int ifs_is_set, ifs_is_null; |
633e5c6d CR |
139 | |
140 | #if defined (HANDLE_MULTIBYTE) | |
141 | unsigned char ifs_firstc[MB_LEN_MAX]; | |
142 | size_t ifs_firstc_len; | |
143 | #else | |
7117c2d2 | 144 | unsigned char ifs_firstc; |
633e5c6d | 145 | #endif |
7117c2d2 | 146 | |
0527c903 CR |
147 | /* Sentinel to tell when we are performing variable assignments preceding a |
148 | command name and putting them into the environment. Used to make sure | |
149 | we use the temporary environment when looking up variable values. */ | |
d7f49990 CR |
150 | int assigning_in_environment; |
151 | ||
0527c903 CR |
152 | /* Used to hold a list of variable assignments preceding a command. Global |
153 | so the SIGCHLD handler in jobs.c can unwind-protect it when it runs a | |
154 | SIGCHLD trap and so it can be saved and restored by the trap handlers. */ | |
155 | WORD_LIST *subst_assign_varlist = (WORD_LIST *)NULL; | |
156 | ||
726f6388 | 157 | /* Extern functions and variables from different files. */ |
d3a24ed2 | 158 | extern int last_command_exit_value, last_command_exit_signal; |
f486d0a1 CR |
159 | extern int subshell_environment, line_number; |
160 | extern int subshell_level, parse_and_execute_level, sourcelevel; | |
7117c2d2 | 161 | extern int eof_encountered; |
bb70624e | 162 | extern int return_catch_flag, return_catch_value; |
f73dda09 | 163 | extern pid_t dollar_dollar_pid; |
726f6388 | 164 | extern int posixly_correct; |
726f6388 | 165 | extern char *this_command_name; |
ccc6cda3 | 166 | extern struct fd_bitmap *current_fds_to_close; |
cce855bc | 167 | extern int wordexp_only; |
d3a24ed2 | 168 | extern int expanding_redir; |
56299fa5 | 169 | extern int tempenv_assign_error; |
77b3aacb | 170 | extern int builtin_ignoring_errexit; |
726f6388 | 171 | |
d3ad40de CR |
172 | #if !defined (HAVE_WCSDUP) && defined (HANDLE_MULTIBYTE) |
173 | extern wchar_t *wcsdup __P((const wchar_t *)); | |
174 | #endif | |
175 | ||
ccc6cda3 JA |
176 | /* Non-zero means to allow unmatched globbed filenames to expand to |
177 | a null file. */ | |
178 | int allow_null_glob_expansion; | |
179 | ||
d3a24ed2 CR |
180 | /* Non-zero means to throw an error when globbing fails to match anything. */ |
181 | int fail_glob_expansion; | |
182 | ||
f73dda09 | 183 | #if 0 |
ccc6cda3 JA |
184 | /* Variables to keep track of which words in an expanded word list (the |
185 | output of expand_word_list_internal) are the result of globbing | |
f73dda09 JA |
186 | expansions. GLOB_ARGV_FLAGS is used by execute_cmd.c. |
187 | (CURRENTLY UNUSED). */ | |
ccc6cda3 JA |
188 | char *glob_argv_flags; |
189 | static int glob_argv_flags_size; | |
f73dda09 | 190 | #endif |
726f6388 JA |
191 | |
192 | static WORD_LIST expand_word_error, expand_word_fatal; | |
227f982e | 193 | static WORD_DESC expand_wdesc_error, expand_wdesc_fatal; |
726f6388 | 194 | static char expand_param_error, expand_param_fatal; |
7027abcb | 195 | static char extract_string_error, extract_string_fatal; |
726f6388 | 196 | |
28ef6c31 JA |
197 | /* Tell the expansion functions to not longjmp back to top_level on fatal |
198 | errors. Enabled when doing completion and prompt string expansion. */ | |
199 | static int no_longjmp_on_fatal_error = 0; | |
200 | ||
201 | /* Set by expand_word_unsplit; used to inhibit splitting and re-joining | |
202 | $* on $IFS, primarily when doing assignment statements. */ | |
203 | static int expand_no_split_dollar_star = 0; | |
bb70624e | 204 | |
bb70624e JA |
205 | /* A WORD_LIST of words to be expanded by expand_word_list_internal, |
206 | without any leading variable assignments. */ | |
207 | static WORD_LIST *garglist = (WORD_LIST *)NULL; | |
b72432fd | 208 | |
f73dda09 | 209 | static char *quoted_substring __P((char *, int, int)); |
7117c2d2 JA |
210 | static int quoted_strlen __P((char *)); |
211 | static char *quoted_strchr __P((char *, int, int)); | |
f73dda09 JA |
212 | |
213 | static char *expand_string_if_necessary __P((char *, int, EXPFUNC *)); | |
214 | static inline char *expand_string_to_string_internal __P((char *, int, EXPFUNC *)); | |
215 | static WORD_LIST *call_expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
216 | static WORD_LIST *expand_string_internal __P((char *, int)); | |
217 | static WORD_LIST *expand_string_leave_quoted __P((char *, int)); | |
218 | static WORD_LIST *expand_string_for_rhs __P((char *, int, int *, int *)); | |
219 | ||
f73dda09 JA |
220 | static WORD_LIST *list_quote_escapes __P((WORD_LIST *)); |
221 | static char *make_quoted_char __P((int)); | |
222 | static WORD_LIST *quote_list __P((WORD_LIST *)); | |
f73dda09 JA |
223 | |
224 | static int unquoted_substring __P((char *, char *)); | |
225 | static int unquoted_member __P((int, char *)); | |
226 | ||
43df7bbb CR |
227 | #if defined (ARRAY_VARS) |
228 | static SHELL_VAR *do_compound_assignment __P((char *, char *, int)); | |
229 | #endif | |
230 | static int do_assignment_internal __P((const WORD_DESC *, int)); | |
f73dda09 | 231 | |
d3ad40de | 232 | static char *string_extract_verbatim __P((char *, size_t, int *, char *, int)); |
f73dda09 JA |
233 | static char *string_extract __P((char *, int *, char *, int)); |
234 | static char *string_extract_double_quoted __P((char *, int *, int)); | |
7117c2d2 | 235 | static inline char *string_extract_single_quoted __P((char *, int *)); |
d3ad40de | 236 | static inline int skip_single_quoted __P((const char *, size_t, int)); |
7117c2d2 JA |
237 | static int skip_double_quoted __P((char *, size_t, int)); |
238 | static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int)); | |
239 | static char *extract_dollar_brace_string __P((char *, int *, int, int)); | |
6932f7f5 | 240 | static int skip_matched_pair __P((const char *, int, int, int, int)); |
f73dda09 | 241 | |
f73dda09 JA |
242 | static char *pos_params __P((char *, int, int, int)); |
243 | ||
545f34cf CR |
244 | static unsigned char *mb_getcharlens __P((char *, int)); |
245 | ||
704a1a2a | 246 | static char *remove_upattern __P((char *, char *, int)); |
d3ad40de | 247 | #if defined (HANDLE_MULTIBYTE) |
704a1a2a CR |
248 | static wchar_t *remove_wpattern __P((wchar_t *, size_t, wchar_t *, int)); |
249 | #endif | |
f73dda09 | 250 | static char *remove_pattern __P((char *, char *, int)); |
704a1a2a | 251 | |
704a1a2a CR |
252 | static int match_upattern __P((char *, char *, int, char **, char **)); |
253 | #if defined (HANDLE_MULTIBYTE) | |
704a1a2a CR |
254 | static int match_wpattern __P((wchar_t *, char **, size_t, wchar_t *, int, char **, char **)); |
255 | #endif | |
f73dda09 JA |
256 | static int match_pattern __P((char *, char *, int, char **, char **)); |
257 | static int getpatspec __P((int, char *)); | |
258 | static char *getpattern __P((char *, int, int)); | |
7117c2d2 | 259 | static char *variable_remove_pattern __P((char *, char *, int, int)); |
f73dda09 | 260 | static char *list_remove_pattern __P((WORD_LIST *, char *, int, int, int)); |
7117c2d2 | 261 | static char *parameter_list_remove_pattern __P((int, char *, int, int)); |
f73dda09 | 262 | #ifdef ARRAY_VARS |
fdf670ea | 263 | static char *array_remove_pattern __P((SHELL_VAR *, char *, int, char *, int)); |
f73dda09 | 264 | #endif |
5f8cde23 | 265 | static char *parameter_brace_remove_pattern __P((char *, char *, int, char *, int, int, int)); |
f73dda09 JA |
266 | |
267 | static char *process_substitute __P((char *, int)); | |
268 | ||
d3ad40de | 269 | static char *read_comsub __P((int, int, int *)); |
f73dda09 JA |
270 | |
271 | #ifdef ARRAY_VARS | |
272 | static arrayind_t array_length_reference __P((char *)); | |
273 | #endif | |
274 | ||
275 | static int valid_brace_expansion_word __P((char *, int)); | |
d3a24ed2 | 276 | static int chk_atstar __P((char *, int, int *, int *)); |
d3ad40de | 277 | static int chk_arithsub __P((const char *, int)); |
d3a24ed2 | 278 | |
5f8cde23 | 279 | static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int, arrayind_t *)); |
227f982e CR |
280 | static WORD_DESC *parameter_brace_expand_indir __P((char *, int, int, int *, int *)); |
281 | static WORD_DESC *parameter_brace_expand_rhs __P((char *, char *, int, int, int *, int *)); | |
f73dda09 JA |
282 | static void parameter_brace_expand_error __P((char *, char *)); |
283 | ||
284 | static int valid_length_expression __P((char *)); | |
7117c2d2 | 285 | static intmax_t parameter_brace_expand_length __P((char *)); |
f73dda09 JA |
286 | |
287 | static char *skiparith __P((char *, int)); | |
09767ff0 | 288 | static int verify_substring_values __P((SHELL_VAR *, char *, char *, int, intmax_t *, intmax_t *)); |
5f8cde23 | 289 | static int get_var_and_type __P((char *, char *, arrayind_t, int, int, SHELL_VAR **, char **)); |
545f34cf | 290 | static char *mb_substring __P((char *, int, int)); |
5f8cde23 | 291 | static char *parameter_brace_substring __P((char *, char *, int, char *, int, int)); |
f73dda09 | 292 | |
ee56a865 CR |
293 | static int shouldexp_replacement __P((char *)); |
294 | ||
f73dda09 JA |
295 | static char *pos_params_pat_subst __P((char *, char *, char *, int)); |
296 | ||
5f8cde23 | 297 | static char *parameter_brace_patsub __P((char *, char *, int, char *, int, int)); |
f73dda09 | 298 | |
09767ff0 | 299 | static char *pos_params_casemod __P((char *, char *, int, int)); |
5f8cde23 | 300 | static char *parameter_brace_casemod __P((char *, char *, int, int, char *, int, int)); |
09767ff0 | 301 | |
e1e48bba | 302 | static WORD_DESC *parameter_brace_expand __P((char *, int *, int, int, int *, int *)); |
227f982e | 303 | static WORD_DESC *param_expand __P((char *, int *, int, int *, int *, int *, int *, int)); |
f73dda09 JA |
304 | |
305 | static WORD_LIST *expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
306 | ||
f73dda09 JA |
307 | static WORD_LIST *word_list_split __P((WORD_LIST *)); |
308 | ||
d3a24ed2 CR |
309 | static void exp_jump_to_top_level __P((int)); |
310 | ||
f73dda09 JA |
311 | static WORD_LIST *separate_out_assignments __P((WORD_LIST *)); |
312 | static WORD_LIST *glob_expand_word_list __P((WORD_LIST *, int)); | |
313 | #ifdef BRACE_EXPANSION | |
314 | static WORD_LIST *brace_expand_word_list __P((WORD_LIST *, int)); | |
315 | #endif | |
fdf670ea CR |
316 | #if defined (ARRAY_VARS) |
317 | static int make_internal_declare __P((char *, char *)); | |
318 | #endif | |
f73dda09 JA |
319 | static WORD_LIST *shell_expand_word_list __P((WORD_LIST *, int)); |
320 | static WORD_LIST *expand_word_list_internal __P((WORD_LIST *, int)); | |
726f6388 JA |
321 | |
322 | /* **************************************************************** */ | |
323 | /* */ | |
324 | /* Utility Functions */ | |
325 | /* */ | |
326 | /* **************************************************************** */ | |
327 | ||
9dd88db7 CR |
328 | #if defined (DEBUG) |
329 | void | |
330 | dump_word_flags (flags) | |
331 | int flags; | |
332 | { | |
333 | int f; | |
334 | ||
335 | f = flags; | |
336 | fprintf (stderr, "%d -> ", f); | |
337 | if (f & W_ASSIGNASSOC) | |
338 | { | |
339 | f &= ~W_ASSIGNASSOC; | |
340 | fprintf (stderr, "W_ASSIGNASSOC%s", f ? "|" : ""); | |
341 | } | |
36eb585c CR |
342 | if (f & W_ASSIGNARRAY) |
343 | { | |
344 | f &= ~W_ASSIGNARRAY; | |
345 | fprintf (stderr, "W_ASSIGNARRAY%s", f ? "|" : ""); | |
346 | } | |
9dd88db7 CR |
347 | if (f & W_HASCTLESC) |
348 | { | |
349 | f &= ~W_HASCTLESC; | |
350 | fprintf (stderr, "W_HASCTLESC%s", f ? "|" : ""); | |
351 | } | |
352 | if (f & W_NOPROCSUB) | |
353 | { | |
354 | f &= ~W_NOPROCSUB; | |
355 | fprintf (stderr, "W_NOPROCSUB%s", f ? "|" : ""); | |
356 | } | |
357 | if (f & W_DQUOTE) | |
358 | { | |
359 | f &= ~W_DQUOTE; | |
360 | fprintf (stderr, "W_DQUOTE%s", f ? "|" : ""); | |
361 | } | |
362 | if (f & W_HASQUOTEDNULL) | |
363 | { | |
364 | f &= ~W_HASQUOTEDNULL; | |
365 | fprintf (stderr, "W_HASQUOTEDNULL%s", f ? "|" : ""); | |
366 | } | |
367 | if (f & W_ASSIGNARG) | |
368 | { | |
369 | f &= ~W_ASSIGNARG; | |
370 | fprintf (stderr, "W_ASSIGNARG%s", f ? "|" : ""); | |
371 | } | |
372 | if (f & W_ASSNBLTIN) | |
373 | { | |
374 | f &= ~W_ASSNBLTIN; | |
375 | fprintf (stderr, "W_ASSNBLTIN%s", f ? "|" : ""); | |
376 | } | |
ec860d76 CR |
377 | if (f & W_ASSNGLOBAL) |
378 | { | |
379 | f &= ~W_ASSNGLOBAL; | |
380 | fprintf (stderr, "W_ASSNGLOBAL%s", f ? "|" : ""); | |
381 | } | |
9dd88db7 CR |
382 | if (f & W_COMPASSIGN) |
383 | { | |
384 | f &= ~W_COMPASSIGN; | |
385 | fprintf (stderr, "W_COMPASSIGN%s", f ? "|" : ""); | |
386 | } | |
387 | if (f & W_NOEXPAND) | |
388 | { | |
389 | f &= ~W_NOEXPAND; | |
390 | fprintf (stderr, "W_NOEXPAND%s", f ? "|" : ""); | |
391 | } | |
392 | if (f & W_ITILDE) | |
393 | { | |
394 | f &= ~W_ITILDE; | |
395 | fprintf (stderr, "W_ITILDE%s", f ? "|" : ""); | |
396 | } | |
397 | if (f & W_NOTILDE) | |
398 | { | |
399 | f &= ~W_NOTILDE; | |
400 | fprintf (stderr, "W_NOTILDE%s", f ? "|" : ""); | |
401 | } | |
402 | if (f & W_ASSIGNRHS) | |
403 | { | |
404 | f &= ~W_ASSIGNRHS; | |
405 | fprintf (stderr, "W_ASSIGNRHS%s", f ? "|" : ""); | |
406 | } | |
407 | if (f & W_NOCOMSUB) | |
408 | { | |
409 | f &= ~W_NOCOMSUB; | |
410 | fprintf (stderr, "W_NOCOMSUB%s", f ? "|" : ""); | |
411 | } | |
412 | if (f & W_DOLLARSTAR) | |
413 | { | |
414 | f &= ~W_DOLLARSTAR; | |
415 | fprintf (stderr, "W_DOLLARSTAR%s", f ? "|" : ""); | |
416 | } | |
417 | if (f & W_DOLLARAT) | |
418 | { | |
419 | f &= ~W_DOLLARAT; | |
420 | fprintf (stderr, "W_DOLLARAT%s", f ? "|" : ""); | |
421 | } | |
422 | if (f & W_TILDEEXP) | |
423 | { | |
424 | f &= ~W_TILDEEXP; | |
425 | fprintf (stderr, "W_TILDEEXP%s", f ? "|" : ""); | |
426 | } | |
427 | if (f & W_NOSPLIT2) | |
428 | { | |
429 | f &= ~W_NOSPLIT2; | |
430 | fprintf (stderr, "W_NOSPLIT2%s", f ? "|" : ""); | |
431 | } | |
9dd88db7 CR |
432 | if (f & W_NOSPLIT) |
433 | { | |
434 | f &= ~W_NOSPLIT; | |
435 | fprintf (stderr, "W_NOSPLIT%s", f ? "|" : ""); | |
436 | } | |
df0e4bfe CR |
437 | if (f & W_NOBRACE) |
438 | { | |
439 | f &= ~W_NOBRACE; | |
440 | fprintf (stderr, "W_NOBRACE%s", f ? "|" : ""); | |
441 | } | |
442 | if (f & W_NOGLOB) | |
443 | { | |
444 | f &= ~W_NOGLOB; | |
445 | fprintf (stderr, "W_NOGLOB%s", f ? "|" : ""); | |
446 | } | |
f0c4de40 | 447 | if (f & W_SPLITSPACE) |
9dd88db7 | 448 | { |
f0c4de40 CR |
449 | f &= ~W_SPLITSPACE; |
450 | fprintf (stderr, "W_SPLITSPACE%s", f ? "|" : ""); | |
9dd88db7 CR |
451 | } |
452 | if (f & W_ASSIGNMENT) | |
453 | { | |
454 | f &= ~W_ASSIGNMENT; | |
455 | fprintf (stderr, "W_ASSIGNMENT%s", f ? "|" : ""); | |
456 | } | |
457 | if (f & W_QUOTED) | |
458 | { | |
459 | f &= ~W_QUOTED; | |
460 | fprintf (stderr, "W_QUOTED%s", f ? "|" : ""); | |
461 | } | |
462 | if (f & W_HASDOLLAR) | |
463 | { | |
464 | f &= ~W_HASDOLLAR; | |
465 | fprintf (stderr, "W_HASDOLLAR%s", f ? "|" : ""); | |
466 | } | |
467 | fprintf (stderr, "\n"); | |
468 | fflush (stderr); | |
469 | } | |
470 | #endif | |
471 | ||
7117c2d2 | 472 | #ifdef INCLUDE_UNUSED |
ccc6cda3 JA |
473 | static char * |
474 | quoted_substring (string, start, end) | |
475 | char *string; | |
476 | int start, end; | |
477 | { | |
478 | register int len, l; | |
479 | register char *result, *s, *r; | |
480 | ||
481 | len = end - start; | |
482 | ||
483 | /* Move to string[start], skipping quoted characters. */ | |
484 | for (s = string, l = 0; *s && l < start; ) | |
485 | { | |
486 | if (*s == CTLESC) | |
487 | { | |
28ef6c31 JA |
488 | s++; |
489 | continue; | |
ccc6cda3 JA |
490 | } |
491 | l++; | |
492 | if (*s == 0) | |
28ef6c31 | 493 | break; |
ccc6cda3 JA |
494 | } |
495 | ||
f73dda09 | 496 | r = result = (char *)xmalloc (2*len + 1); /* save room for quotes */ |
ccc6cda3 JA |
497 | |
498 | /* Copy LEN characters, including quote characters. */ | |
499 | s = string + l; | |
500 | for (l = 0; l < len; s++) | |
501 | { | |
502 | if (*s == CTLESC) | |
28ef6c31 | 503 | *r++ = *s++; |
ccc6cda3 JA |
504 | *r++ = *s; |
505 | l++; | |
506 | if (*s == 0) | |
28ef6c31 | 507 | break; |
ccc6cda3 JA |
508 | } |
509 | *r = '\0'; | |
510 | return result; | |
511 | } | |
7117c2d2 JA |
512 | #endif |
513 | ||
514 | #ifdef INCLUDE_UNUSED | |
515 | /* Return the length of S, skipping over quoted characters */ | |
516 | static int | |
517 | quoted_strlen (s) | |
518 | char *s; | |
519 | { | |
520 | register char *p; | |
521 | int i; | |
522 | ||
523 | i = 0; | |
524 | for (p = s; *p; p++) | |
525 | { | |
526 | if (*p == CTLESC) | |
527 | { | |
528 | p++; | |
529 | if (*p == 0) | |
530 | return (i + 1); | |
531 | } | |
532 | i++; | |
533 | } | |
534 | ||
535 | return i; | |
536 | } | |
537 | #endif | |
ccc6cda3 JA |
538 | |
539 | /* Find the first occurrence of character C in string S, obeying shell | |
540 | quoting rules. If (FLAGS & ST_BACKSL) is non-zero, backslash-escaped | |
541 | characters are skipped. If (FLAGS & ST_CTLESC) is non-zero, characters | |
542 | escaped with CTLESC are skipped. */ | |
7117c2d2 | 543 | static char * |
ccc6cda3 JA |
544 | quoted_strchr (s, c, flags) |
545 | char *s; | |
546 | int c, flags; | |
547 | { | |
548 | register char *p; | |
549 | ||
550 | for (p = s; *p; p++) | |
551 | { | |
552 | if (((flags & ST_BACKSL) && *p == '\\') | |
553 | || ((flags & ST_CTLESC) && *p == CTLESC)) | |
554 | { | |
555 | p++; | |
556 | if (*p == '\0') | |
557 | return ((char *)NULL); | |
558 | continue; | |
559 | } | |
560 | else if (*p == c) | |
561 | return p; | |
562 | } | |
563 | return ((char *)NULL); | |
564 | } | |
565 | ||
cce855bc | 566 | /* Return 1 if CHARACTER appears in an unquoted portion of |
7117c2d2 | 567 | STRING. Return 0 otherwise. CHARACTER must be a single-byte character. */ |
cce855bc JA |
568 | static int |
569 | unquoted_member (character, string) | |
570 | int character; | |
726f6388 JA |
571 | char *string; |
572 | { | |
7117c2d2 | 573 | size_t slen; |
cce855bc | 574 | int sindex, c; |
7117c2d2 | 575 | DECLARE_MBSTATE; |
726f6388 | 576 | |
7117c2d2 JA |
577 | slen = strlen (string); |
578 | sindex = 0; | |
579 | while (c = string[sindex]) | |
726f6388 | 580 | { |
cce855bc JA |
581 | if (c == character) |
582 | return (1); | |
583 | ||
584 | switch (c) | |
ccc6cda3 | 585 | { |
cce855bc | 586 | default: |
7117c2d2 | 587 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
588 | break; |
589 | ||
590 | case '\\': | |
591 | sindex++; | |
592 | if (string[sindex]) | |
7117c2d2 | 593 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
594 | break; |
595 | ||
596 | case '\'': | |
7117c2d2 | 597 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
598 | break; |
599 | ||
600 | case '"': | |
7117c2d2 | 601 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc | 602 | break; |
ccc6cda3 | 603 | } |
726f6388 | 604 | } |
cce855bc | 605 | return (0); |
726f6388 JA |
606 | } |
607 | ||
cce855bc JA |
608 | /* Return 1 if SUBSTR appears in an unquoted portion of STRING. */ |
609 | static int | |
610 | unquoted_substring (substr, string) | |
611 | char *substr, *string; | |
726f6388 | 612 | { |
7117c2d2 | 613 | size_t slen; |
cce855bc | 614 | int sindex, c, sublen; |
7117c2d2 | 615 | DECLARE_MBSTATE; |
726f6388 | 616 | |
cce855bc JA |
617 | if (substr == 0 || *substr == '\0') |
618 | return (0); | |
619 | ||
7117c2d2 | 620 | slen = strlen (string); |
cce855bc JA |
621 | sublen = strlen (substr); |
622 | for (sindex = 0; c = string[sindex]; ) | |
726f6388 | 623 | { |
cce855bc JA |
624 | if (STREQN (string + sindex, substr, sublen)) |
625 | return (1); | |
626 | ||
627 | switch (c) | |
628 | { | |
629 | case '\\': | |
630 | sindex++; | |
cce855bc | 631 | if (string[sindex]) |
7117c2d2 | 632 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
633 | break; |
634 | ||
635 | case '\'': | |
7117c2d2 | 636 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
637 | break; |
638 | ||
639 | case '"': | |
7117c2d2 | 640 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc JA |
641 | break; |
642 | ||
643 | default: | |
7117c2d2 | 644 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
645 | break; |
646 | } | |
726f6388 | 647 | } |
cce855bc | 648 | return (0); |
ccc6cda3 | 649 | } |
726f6388 | 650 | |
cce855bc JA |
651 | /* Most of the substitutions must be done in parallel. In order |
652 | to avoid using tons of unclear goto's, I have some functions | |
653 | for manipulating malloc'ed strings. They all take INDX, a | |
654 | pointer to an integer which is the offset into the string | |
655 | where manipulation is taking place. They also take SIZE, a | |
656 | pointer to an integer which is the current length of the | |
657 | character array for this string. */ | |
726f6388 | 658 | |
cce855bc JA |
659 | /* Append SOURCE to TARGET at INDEX. SIZE is the current amount |
660 | of space allocated to TARGET. SOURCE can be NULL, in which | |
661 | case nothing happens. Gets rid of SOURCE by freeing it. | |
662 | Returns TARGET in case the location has changed. */ | |
7117c2d2 | 663 | INLINE char * |
cce855bc JA |
664 | sub_append_string (source, target, indx, size) |
665 | char *source, *target; | |
666 | int *indx, *size; | |
667 | { | |
668 | if (source) | |
726f6388 | 669 | { |
cce855bc JA |
670 | int srclen, n; |
671 | ||
672 | srclen = STRLEN (source); | |
673 | if (srclen >= (int)(*size - *indx)) | |
726f6388 | 674 | { |
cce855bc JA |
675 | n = srclen + *indx; |
676 | n = (n + DEFAULT_ARRAY_SIZE) - (n % DEFAULT_ARRAY_SIZE); | |
f73dda09 | 677 | target = (char *)xrealloc (target, (*size = n)); |
726f6388 | 678 | } |
cce855bc JA |
679 | |
680 | FASTCOPY (source, target + *indx, srclen); | |
681 | *indx += srclen; | |
682 | target[*indx] = '\0'; | |
683 | ||
684 | free (source); | |
726f6388 | 685 | } |
cce855bc JA |
686 | return (target); |
687 | } | |
688 | ||
689 | #if 0 | |
690 | /* UNUSED */ | |
691 | /* Append the textual representation of NUMBER to TARGET. | |
692 | INDX and SIZE are as in SUB_APPEND_STRING. */ | |
693 | char * | |
694 | sub_append_number (number, target, indx, size) | |
7117c2d2 | 695 | intmax_t number; |
f73dda09 | 696 | int *indx, *size; |
cce855bc JA |
697 | char *target; |
698 | { | |
699 | char *temp; | |
700 | ||
701 | temp = itos (number); | |
702 | return (sub_append_string (temp, target, indx, size)); | |
726f6388 | 703 | } |
d166f048 | 704 | #endif |
726f6388 JA |
705 | |
706 | /* Extract a substring from STRING, starting at SINDEX and ending with | |
707 | one of the characters in CHARLIST. Don't make the ending character | |
708 | part of the string. Leave SINDEX pointing at the ending character. | |
e6598ba4 | 709 | Understand about backslashes in the string. If (flags & SX_VARNAME) |
7117c2d2 JA |
710 | is non-zero, and array variables have been compiled into the shell, |
711 | everything between a `[' and a corresponding `]' is skipped over. | |
e6598ba4 CR |
712 | If (flags & SX_NOALLOC) is non-zero, don't return the substring, just |
713 | update SINDEX. If (flags & SX_REQMATCH) is non-zero, the string must | |
7027abcb | 714 | contain a closing character from CHARLIST. */ |
726f6388 | 715 | static char * |
7117c2d2 | 716 | string_extract (string, sindex, charlist, flags) |
f73dda09 JA |
717 | char *string; |
718 | int *sindex; | |
719 | char *charlist; | |
7117c2d2 | 720 | int flags; |
726f6388 | 721 | { |
ccc6cda3 | 722 | register int c, i; |
7027abcb | 723 | int found; |
7117c2d2 | 724 | size_t slen; |
726f6388 | 725 | char *temp; |
7117c2d2 | 726 | DECLARE_MBSTATE; |
726f6388 | 727 | |
da713c23 | 728 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; |
7117c2d2 | 729 | i = *sindex; |
7027abcb | 730 | found = 0; |
7117c2d2 | 731 | while (c = string[i]) |
726f6388 JA |
732 | { |
733 | if (c == '\\') | |
7117c2d2 JA |
734 | { |
735 | if (string[i + 1]) | |
736 | i++; | |
737 | else | |
738 | break; | |
739 | } | |
ccc6cda3 | 740 | #if defined (ARRAY_VARS) |
e6598ba4 | 741 | else if ((flags & SX_VARNAME) && c == '[') |
ccc6cda3 JA |
742 | { |
743 | int ni; | |
744 | /* If this is an array subscript, skip over it and continue. */ | |
3eb2d94a | 745 | ni = skipsubscript (string, i, 0); |
ccc6cda3 JA |
746 | if (string[ni] == ']') |
747 | i = ni; | |
748 | } | |
749 | #endif | |
750 | else if (MEMBER (c, charlist)) | |
7027abcb CR |
751 | { |
752 | found = 1; | |
726f6388 | 753 | break; |
7027abcb | 754 | } |
7117c2d2 JA |
755 | |
756 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 757 | } |
bb70624e | 758 | |
7027abcb CR |
759 | /* If we had to have a matching delimiter and didn't find one, return an |
760 | error and let the caller deal with it. */ | |
e6598ba4 | 761 | if ((flags & SX_REQMATCH) && found == 0) |
7027abcb CR |
762 | { |
763 | *sindex = i; | |
764 | return (&extract_string_error); | |
765 | } | |
766 | ||
e6598ba4 | 767 | temp = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 | 768 | *sindex = i; |
7027abcb | 769 | |
726f6388 JA |
770 | return (temp); |
771 | } | |
772 | ||
ccc6cda3 JA |
773 | /* Extract the contents of STRING as if it is enclosed in double quotes. |
774 | SINDEX, when passed in, is the offset of the character immediately | |
775 | following the opening double quote; on exit, SINDEX is left pointing after | |
776 | the closing double quote. If STRIPDQ is non-zero, unquoted double | |
777 | quotes are stripped and the string is terminated by a null byte. | |
778 | Backslashes between the embedded double quotes are processed. If STRIPDQ | |
779 | is zero, an unquoted `"' terminates the string. */ | |
7117c2d2 | 780 | static char * |
ccc6cda3 | 781 | string_extract_double_quoted (string, sindex, stripdq) |
726f6388 | 782 | char *string; |
ccc6cda3 | 783 | int *sindex, stripdq; |
726f6388 | 784 | { |
7117c2d2 JA |
785 | size_t slen; |
786 | char *send; | |
f73dda09 JA |
787 | int j, i, t; |
788 | unsigned char c; | |
ccc6cda3 JA |
789 | char *temp, *ret; /* The new string we return. */ |
790 | int pass_next, backquote, si; /* State variables for the machine. */ | |
791 | int dquote; | |
7117c2d2 JA |
792 | DECLARE_MBSTATE; |
793 | ||
794 | slen = strlen (string + *sindex) + *sindex; | |
795 | send = string + slen; | |
726f6388 | 796 | |
ccc6cda3 | 797 | pass_next = backquote = dquote = 0; |
7117c2d2 | 798 | temp = (char *)xmalloc (1 + slen - *sindex); |
726f6388 | 799 | |
7117c2d2 JA |
800 | j = 0; |
801 | i = *sindex; | |
802 | while (c = string[i]) | |
726f6388 | 803 | { |
ccc6cda3 JA |
804 | /* Process a character that was quoted by a backslash. */ |
805 | if (pass_next) | |
726f6388 | 806 | { |
9e51a74d | 807 | /* XXX - take another look at this in light of Interp 221 */ |
ccc6cda3 | 808 | /* Posix.2 sez: |
726f6388 | 809 | |
ccc6cda3 JA |
810 | ``The backslash shall retain its special meaning as an escape |
811 | character only when followed by one of the characters: | |
7117c2d2 | 812 | $ ` " \ <newline>''. |
726f6388 | 813 | |
ccc6cda3 JA |
814 | If STRIPDQ is zero, we handle the double quotes here and let |
815 | expand_word_internal handle the rest. If STRIPDQ is non-zero, | |
816 | we have already been through one round of backslash stripping, | |
817 | and want to strip these backslashes only if DQUOTE is non-zero, | |
818 | indicating that we are inside an embedded double-quoted string. */ | |
819 | ||
820 | /* If we are in an embedded quoted string, then don't strip | |
821 | backslashes before characters for which the backslash | |
822 | retains its special meaning, but remove backslashes in | |
823 | front of other characters. If we are not in an | |
824 | embedded quoted string, don't strip backslashes at all. | |
825 | This mess is necessary because the string was already | |
826 | surrounded by double quotes (and sh has some really weird | |
827 | quoting rules). | |
828 | The returned string will be run through expansion as if | |
829 | it were double-quoted. */ | |
830 | if ((stripdq == 0 && c != '"') || | |
28ef6c31 | 831 | (stripdq && ((dquote && (sh_syntaxtab[c] & CBSDQUOTE)) || dquote == 0))) |
ccc6cda3 | 832 | temp[j++] = '\\'; |
ccc6cda3 | 833 | pass_next = 0; |
7117c2d2 JA |
834 | |
835 | add_one_character: | |
836 | COPY_CHAR_I (temp, j, string, send, i); | |
ccc6cda3 JA |
837 | continue; |
838 | } | |
726f6388 | 839 | |
ccc6cda3 JA |
840 | /* A backslash protects the next character. The code just above |
841 | handles preserving the backslash in front of any character but | |
842 | a double quote. */ | |
843 | if (c == '\\') | |
726f6388 | 844 | { |
ccc6cda3 | 845 | pass_next++; |
7117c2d2 | 846 | i++; |
726f6388 JA |
847 | continue; |
848 | } | |
849 | ||
ccc6cda3 JA |
850 | /* Inside backquotes, ``the portion of the quoted string from the |
851 | initial backquote and the characters up to the next backquote | |
852 | that is not preceded by a backslash, having escape characters | |
853 | removed, defines that command''. */ | |
854 | if (backquote) | |
726f6388 | 855 | { |
ccc6cda3 JA |
856 | if (c == '`') |
857 | backquote = 0; | |
858 | temp[j++] = c; | |
7117c2d2 | 859 | i++; |
726f6388 JA |
860 | continue; |
861 | } | |
862 | ||
ccc6cda3 | 863 | if (c == '`') |
726f6388 | 864 | { |
ccc6cda3 JA |
865 | temp[j++] = c; |
866 | backquote++; | |
7117c2d2 | 867 | i++; |
ccc6cda3 | 868 | continue; |
726f6388 JA |
869 | } |
870 | ||
ccc6cda3 JA |
871 | /* Pass everything between `$(' and the matching `)' or a quoted |
872 | ${ ... } pair through according to the Posix.2 specification. */ | |
cce855bc | 873 | if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
726f6388 | 874 | { |
61deeb13 CR |
875 | int free_ret = 1; |
876 | ||
ccc6cda3 | 877 | si = i + 2; |
cce855bc | 878 | if (string[i + 1] == LPAREN) |
e33f2203 | 879 | ret = extract_command_subst (string, &si, 0); |
ccc6cda3 | 880 | else |
64419627 | 881 | ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, 0); |
726f6388 | 882 | |
ccc6cda3 JA |
883 | temp[j++] = '$'; |
884 | temp[j++] = string[i + 1]; | |
726f6388 | 885 | |
61deeb13 CR |
886 | /* Just paranoia; ret will not be 0 unless no_longjmp_on_fatal_error |
887 | is set. */ | |
888 | if (ret == 0 && no_longjmp_on_fatal_error) | |
889 | { | |
890 | free_ret = 0; | |
891 | ret = string + i + 2; | |
892 | } | |
893 | ||
ccc6cda3 JA |
894 | for (t = 0; ret[t]; t++, j++) |
895 | temp[j] = ret[t]; | |
56299fa5 CR |
896 | temp[j] = string[si]; |
897 | ||
898 | if (string[si]) | |
899 | { | |
900 | j++; | |
901 | i = si + 1; | |
902 | } | |
903 | else | |
904 | i = si; | |
726f6388 | 905 | |
61deeb13 CR |
906 | if (free_ret) |
907 | free (ret); | |
ccc6cda3 | 908 | continue; |
726f6388 JA |
909 | } |
910 | ||
ccc6cda3 | 911 | /* Add any character but a double quote to the quoted string we're |
28ef6c31 | 912 | accumulating. */ |
ccc6cda3 | 913 | if (c != '"') |
7117c2d2 | 914 | goto add_one_character; |
ccc6cda3 JA |
915 | |
916 | /* c == '"' */ | |
917 | if (stripdq) | |
726f6388 | 918 | { |
ccc6cda3 | 919 | dquote ^= 1; |
7117c2d2 | 920 | i++; |
ccc6cda3 | 921 | continue; |
726f6388 | 922 | } |
ccc6cda3 JA |
923 | |
924 | break; | |
726f6388 | 925 | } |
ccc6cda3 | 926 | temp[j] = '\0'; |
726f6388 | 927 | |
ccc6cda3 JA |
928 | /* Point to after the closing quote. */ |
929 | if (c) | |
930 | i++; | |
726f6388 JA |
931 | *sindex = i; |
932 | ||
ccc6cda3 JA |
933 | return (temp); |
934 | } | |
935 | ||
936 | /* This should really be another option to string_extract_double_quoted. */ | |
f73dda09 | 937 | static int |
7117c2d2 | 938 | skip_double_quoted (string, slen, sind) |
ccc6cda3 | 939 | char *string; |
7117c2d2 | 940 | size_t slen; |
ccc6cda3 JA |
941 | int sind; |
942 | { | |
f73dda09 | 943 | int c, i; |
ccc6cda3 JA |
944 | char *ret; |
945 | int pass_next, backquote, si; | |
7117c2d2 | 946 | DECLARE_MBSTATE; |
ccc6cda3 JA |
947 | |
948 | pass_next = backquote = 0; | |
7117c2d2 JA |
949 | i = sind; |
950 | while (c = string[i]) | |
726f6388 | 951 | { |
ccc6cda3 JA |
952 | if (pass_next) |
953 | { | |
954 | pass_next = 0; | |
7117c2d2 | 955 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
956 | continue; |
957 | } | |
958 | else if (c == '\\') | |
959 | { | |
960 | pass_next++; | |
7117c2d2 | 961 | i++; |
ccc6cda3 JA |
962 | continue; |
963 | } | |
964 | else if (backquote) | |
965 | { | |
966 | if (c == '`') | |
967 | backquote = 0; | |
7117c2d2 | 968 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
969 | continue; |
970 | } | |
971 | else if (c == '`') | |
972 | { | |
973 | backquote++; | |
7117c2d2 | 974 | i++; |
ccc6cda3 JA |
975 | continue; |
976 | } | |
cce855bc | 977 | else if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
ccc6cda3 JA |
978 | { |
979 | si = i + 2; | |
cce855bc | 980 | if (string[i + 1] == LPAREN) |
e33f2203 | 981 | ret = extract_command_subst (string, &si, SX_NOALLOC); |
ccc6cda3 | 982 | else |
9e51a74d | 983 | ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, SX_NOALLOC); |
ccc6cda3 | 984 | |
7117c2d2 | 985 | i = si + 1; |
ccc6cda3 JA |
986 | continue; |
987 | } | |
988 | else if (c != '"') | |
7117c2d2 JA |
989 | { |
990 | ADVANCE_CHAR (string, slen, i); | |
991 | continue; | |
992 | } | |
ccc6cda3 JA |
993 | else |
994 | break; | |
726f6388 | 995 | } |
ccc6cda3 JA |
996 | |
997 | if (c) | |
998 | i++; | |
999 | ||
1000 | return (i); | |
726f6388 JA |
1001 | } |
1002 | ||
ccc6cda3 JA |
1003 | /* Extract the contents of STRING as if it is enclosed in single quotes. |
1004 | SINDEX, when passed in, is the offset of the character immediately | |
1005 | following the opening single quote; on exit, SINDEX is left pointing after | |
1006 | the closing single quote. */ | |
1007 | static inline char * | |
1008 | string_extract_single_quoted (string, sindex) | |
1009 | char *string; | |
1010 | int *sindex; | |
1011 | { | |
f73dda09 | 1012 | register int i; |
7117c2d2 | 1013 | size_t slen; |
ccc6cda3 | 1014 | char *t; |
7117c2d2 | 1015 | DECLARE_MBSTATE; |
ccc6cda3 | 1016 | |
da713c23 CR |
1017 | /* Don't need slen for ADVANCE_CHAR unless multibyte chars possible. */ |
1018 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; | |
7117c2d2 JA |
1019 | i = *sindex; |
1020 | while (string[i] && string[i] != '\'') | |
1021 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 | 1022 | |
bb70624e | 1023 | t = substring (string, *sindex, i); |
ccc6cda3 JA |
1024 | |
1025 | if (string[i]) | |
1026 | i++; | |
1027 | *sindex = i; | |
1028 | ||
1029 | return (t); | |
1030 | } | |
1031 | ||
1032 | static inline int | |
7117c2d2 | 1033 | skip_single_quoted (string, slen, sind) |
d3ad40de | 1034 | const char *string; |
7117c2d2 | 1035 | size_t slen; |
ccc6cda3 JA |
1036 | int sind; |
1037 | { | |
28ef6c31 | 1038 | register int c; |
7117c2d2 JA |
1039 | DECLARE_MBSTATE; |
1040 | ||
1041 | c = sind; | |
1042 | while (string[c] && string[c] != '\'') | |
1043 | ADVANCE_CHAR (string, slen, c); | |
ccc6cda3 | 1044 | |
28ef6c31 JA |
1045 | if (string[c]) |
1046 | c++; | |
1047 | return c; | |
ccc6cda3 JA |
1048 | } |
1049 | ||
1050 | /* Just like string_extract, but doesn't hack backslashes or any of | |
bb70624e | 1051 | that other stuff. Obeys CTLESC quoting. Used to do splitting on $IFS. */ |
726f6388 | 1052 | static char * |
d3ad40de | 1053 | string_extract_verbatim (string, slen, sindex, charlist, flags) |
f73dda09 | 1054 | char *string; |
da713c23 | 1055 | size_t slen; |
ccc6cda3 | 1056 | int *sindex; |
f73dda09 | 1057 | char *charlist; |
d3ad40de | 1058 | int flags; |
ccc6cda3 | 1059 | { |
824dfe68 | 1060 | register int i; |
633e5c6d CR |
1061 | #if defined (HANDLE_MULTIBYTE) |
1062 | size_t clen; | |
1063 | wchar_t *wcharlist; | |
1064 | #endif | |
ccc6cda3 JA |
1065 | int c; |
1066 | char *temp; | |
633e5c6d | 1067 | DECLARE_MBSTATE; |
ccc6cda3 JA |
1068 | |
1069 | if (charlist[0] == '\'' && charlist[1] == '\0') | |
1070 | { | |
1071 | temp = string_extract_single_quoted (string, sindex); | |
1072 | --*sindex; /* leave *sindex at separator character */ | |
1073 | return temp; | |
1074 | } | |
1075 | ||
633e5c6d | 1076 | i = *sindex; |
da713c23 CR |
1077 | #if 0 |
1078 | /* See how the MBLEN and ADVANCE_CHAR macros work to understand why we need | |
1079 | this only if MB_CUR_MAX > 1. */ | |
1080 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 1; | |
1081 | #endif | |
633e5c6d CR |
1082 | #if defined (HANDLE_MULTIBYTE) |
1083 | clen = strlen (charlist); | |
1084 | wcharlist = 0; | |
1085 | #endif | |
1086 | while (c = string[i]) | |
ccc6cda3 | 1087 | { |
633e5c6d CR |
1088 | #if defined (HANDLE_MULTIBYTE) |
1089 | size_t mblength; | |
1090 | #endif | |
e6598ba4 CR |
1091 | if ((flags & SX_NOCTLESC) == 0 && c == CTLESC) |
1092 | { | |
1093 | i += 2; | |
1094 | continue; | |
1095 | } | |
1096 | /* Even if flags contains SX_NOCTLESC, we let CTLESC quoting CTLNUL | |
1097 | through, to protect the CTLNULs from later calls to | |
1098 | remove_quoted_nulls. */ | |
1099 | else if ((flags & SX_NOESCCTLNUL) == 0 && c == CTLESC && string[i+1] == CTLNUL) | |
ccc6cda3 | 1100 | { |
633e5c6d | 1101 | i += 2; |
ccc6cda3 JA |
1102 | continue; |
1103 | } | |
e33f2203 | 1104 | |
633e5c6d | 1105 | #if defined (HANDLE_MULTIBYTE) |
da713c23 | 1106 | mblength = MBLEN (string + i, slen - i); |
633e5c6d CR |
1107 | if (mblength > 1) |
1108 | { | |
1109 | wchar_t wc; | |
1110 | mblength = mbtowc (&wc, string + i, slen - i); | |
1111 | if (MB_INVALIDCH (mblength)) | |
1112 | { | |
1113 | if (MEMBER (c, charlist)) | |
1114 | break; | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | if (wcharlist == 0) | |
1119 | { | |
1120 | size_t len; | |
1121 | len = mbstowcs (wcharlist, charlist, 0); | |
1122 | if (len == -1) | |
1123 | len = 0; | |
d3ad40de CR |
1124 | wcharlist = (wchar_t *)xmalloc (sizeof (wchar_t) * (len + 1)); |
1125 | mbstowcs (wcharlist, charlist, len + 1); | |
633e5c6d CR |
1126 | } |
1127 | ||
1128 | if (wcschr (wcharlist, wc)) | |
1129 | break; | |
1130 | } | |
1131 | } | |
1132 | else | |
1133 | #endif | |
ccc6cda3 JA |
1134 | if (MEMBER (c, charlist)) |
1135 | break; | |
633e5c6d CR |
1136 | |
1137 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 JA |
1138 | } |
1139 | ||
633e5c6d CR |
1140 | #if defined (HANDLE_MULTIBYTE) |
1141 | FREE (wcharlist); | |
1142 | #endif | |
1143 | ||
bb70624e | 1144 | temp = substring (string, *sindex, i); |
ccc6cda3 JA |
1145 | *sindex = i; |
1146 | ||
1147 | return (temp); | |
1148 | } | |
1149 | ||
1150 | /* Extract the $( construct in STRING, and return a new string. | |
1151 | Start extracting at (SINDEX) as if we had just seen "$(". | |
e33f2203 | 1152 | Make (SINDEX) get the position of the matching ")". ) |
ecf57862 | 1153 | XFLAGS is additional flags to pass to other extraction functions. */ |
ccc6cda3 | 1154 | char * |
e33f2203 | 1155 | extract_command_subst (string, sindex, xflags) |
726f6388 JA |
1156 | char *string; |
1157 | int *sindex; | |
e33f2203 | 1158 | int xflags; |
726f6388 | 1159 | { |
176b12ee | 1160 | if (string[*sindex] == LPAREN) |
e33f2203 CR |
1161 | return (extract_delimited_string (string, sindex, "$(", "(", ")", xflags|SX_COMMAND)); /*)*/ |
1162 | else | |
1163 | { | |
1164 | xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0); | |
1165 | return (xparse_dolparen (string, string+*sindex, sindex, xflags)); | |
1166 | } | |
ccc6cda3 JA |
1167 | } |
1168 | ||
28ef6c31 | 1169 | /* Extract the $[ construct in STRING, and return a new string. (]) |
ccc6cda3 JA |
1170 | Start extracting at (SINDEX) as if we had just seen "$[". |
1171 | Make (SINDEX) get the position of the matching "]". */ | |
1172 | char * | |
1173 | extract_arithmetic_subst (string, sindex) | |
1174 | char *string; | |
1175 | int *sindex; | |
1176 | { | |
7117c2d2 | 1177 | return (extract_delimited_string (string, sindex, "$[", "[", "]", 0)); /*]*/ |
ccc6cda3 JA |
1178 | } |
1179 | ||
1180 | #if defined (PROCESS_SUBSTITUTION) | |
1181 | /* Extract the <( or >( construct in STRING, and return a new string. | |
1182 | Start extracting at (SINDEX) as if we had just seen "<(". | |
cce855bc | 1183 | Make (SINDEX) get the position of the matching ")". */ /*))*/ |
ccc6cda3 JA |
1184 | char * |
1185 | extract_process_subst (string, starter, sindex) | |
1186 | char *string; | |
1187 | char *starter; | |
1188 | int *sindex; | |
1189 | { | |
f4f5e1c2 | 1190 | return (extract_delimited_string (string, sindex, starter, "(", ")", SX_COMMAND)); |
ccc6cda3 JA |
1191 | } |
1192 | #endif /* PROCESS_SUBSTITUTION */ | |
1193 | ||
1194 | #if defined (ARRAY_VARS) | |
43df7bbb CR |
1195 | /* This can be fooled by unquoted right parens in the passed string. If |
1196 | each caller verifies that the last character in STRING is a right paren, | |
1197 | we don't even need to call extract_delimited_string. */ | |
ccc6cda3 JA |
1198 | char * |
1199 | extract_array_assignment_list (string, sindex) | |
1200 | char *string; | |
1201 | int *sindex; | |
1202 | { | |
43df7bbb CR |
1203 | int slen; |
1204 | char *ret; | |
1205 | ||
1206 | slen = strlen (string); /* ( */ | |
1207 | if (string[slen - 1] == ')') | |
1208 | { | |
1209 | ret = substring (string, *sindex, slen - 1); | |
1210 | *sindex = slen - 1; | |
1211 | return ret; | |
1212 | } | |
e225d5a9 | 1213 | return 0; |
ccc6cda3 JA |
1214 | } |
1215 | #endif | |
1216 | ||
1217 | /* Extract and create a new string from the contents of STRING, a | |
1218 | character string delimited with OPENER and CLOSER. SINDEX is | |
1219 | the address of an int describing the current offset in STRING; | |
1220 | it should point to just after the first OPENER found. On exit, | |
1221 | SINDEX gets the position of the last character of the matching CLOSER. | |
1222 | If OPENER is more than a single character, ALT_OPENER, if non-null, | |
1223 | contains a character string that can also match CLOSER and thus | |
1224 | needs to be skipped. */ | |
1225 | static char * | |
7117c2d2 | 1226 | extract_delimited_string (string, sindex, opener, alt_opener, closer, flags) |
ccc6cda3 JA |
1227 | char *string; |
1228 | int *sindex; | |
1229 | char *opener, *alt_opener, *closer; | |
7117c2d2 | 1230 | int flags; |
ccc6cda3 JA |
1231 | { |
1232 | int i, c, si; | |
7117c2d2 | 1233 | size_t slen; |
ccc6cda3 | 1234 | char *t, *result; |
d3ad40de | 1235 | int pass_character, nesting_level, in_comment; |
ccc6cda3 | 1236 | int len_closer, len_opener, len_alt_opener; |
7117c2d2 | 1237 | DECLARE_MBSTATE; |
ccc6cda3 | 1238 | |
7117c2d2 | 1239 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 JA |
1240 | len_opener = STRLEN (opener); |
1241 | len_alt_opener = STRLEN (alt_opener); | |
1242 | len_closer = STRLEN (closer); | |
726f6388 | 1243 | |
d3ad40de | 1244 | pass_character = in_comment = 0; |
726f6388 JA |
1245 | |
1246 | nesting_level = 1; | |
ccc6cda3 | 1247 | i = *sindex; |
726f6388 | 1248 | |
ccc6cda3 | 1249 | while (nesting_level) |
726f6388 | 1250 | { |
ccc6cda3 JA |
1251 | c = string[i]; |
1252 | ||
1253 | if (c == 0) | |
28ef6c31 | 1254 | break; |
ccc6cda3 | 1255 | |
d3ad40de CR |
1256 | if (in_comment) |
1257 | { | |
1258 | if (c == '\n') | |
1259 | in_comment = 0; | |
1260 | ADVANCE_CHAR (string, slen, i); | |
1261 | continue; | |
1262 | } | |
1263 | ||
ccc6cda3 | 1264 | if (pass_character) /* previous char was backslash */ |
726f6388 JA |
1265 | { |
1266 | pass_character = 0; | |
7117c2d2 | 1267 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1268 | continue; |
1269 | } | |
1270 | ||
d3ad40de | 1271 | /* Not exactly right yet; should handle shell metacharacters and |
602bb739 | 1272 | multibyte characters, too. See COMMENT_BEGIN define in parse.y */ |
e33f2203 | 1273 | if ((flags & SX_COMMAND) && c == '#' && (i == 0 || string[i - 1] == '\n' || shellblank (string[i - 1]))) |
d3ad40de CR |
1274 | { |
1275 | in_comment = 1; | |
1276 | ADVANCE_CHAR (string, slen, i); | |
1277 | continue; | |
1278 | } | |
1279 | ||
7117c2d2 | 1280 | if (c == CTLESC || c == '\\') |
726f6388 | 1281 | { |
ccc6cda3 JA |
1282 | pass_character++; |
1283 | i++; | |
1284 | continue; | |
726f6388 JA |
1285 | } |
1286 | ||
6faad625 CR |
1287 | /* Process a nested command substitution, but only if we're parsing an |
1288 | arithmetic substitution. */ | |
ecf57862 CR |
1289 | if ((flags & SX_COMMAND) && string[i] == '$' && string[i+1] == LPAREN) |
1290 | { | |
1291 | si = i + 2; | |
3d8cce26 | 1292 | t = extract_command_subst (string, &si, flags|SX_NOALLOC); |
ecf57862 CR |
1293 | i = si + 1; |
1294 | continue; | |
1295 | } | |
ecf57862 | 1296 | |
ccc6cda3 JA |
1297 | /* Process a nested OPENER. */ |
1298 | if (STREQN (string + i, opener, len_opener)) | |
726f6388 | 1299 | { |
ccc6cda3 | 1300 | si = i + len_opener; |
e6598ba4 | 1301 | t = extract_delimited_string (string, &si, opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1302 | i = si + 1; |
ccc6cda3 | 1303 | continue; |
726f6388 JA |
1304 | } |
1305 | ||
ccc6cda3 JA |
1306 | /* Process a nested ALT_OPENER */ |
1307 | if (len_alt_opener && STREQN (string + i, alt_opener, len_alt_opener)) | |
726f6388 | 1308 | { |
ccc6cda3 | 1309 | si = i + len_alt_opener; |
e6598ba4 | 1310 | t = extract_delimited_string (string, &si, alt_opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1311 | i = si + 1; |
726f6388 JA |
1312 | continue; |
1313 | } | |
ccc6cda3 JA |
1314 | |
1315 | /* If the current substring terminates the delimited string, decrement | |
1316 | the nesting level. */ | |
1317 | if (STREQN (string + i, closer, len_closer)) | |
726f6388 | 1318 | { |
7117c2d2 | 1319 | i += len_closer - 1; /* move to last byte of the closer */ |
ccc6cda3 JA |
1320 | nesting_level--; |
1321 | if (nesting_level == 0) | |
1322 | break; | |
726f6388 | 1323 | } |
ccc6cda3 JA |
1324 | |
1325 | /* Pass old-style command substitution through verbatim. */ | |
1326 | if (c == '`') | |
28ef6c31 JA |
1327 | { |
1328 | si = i + 1; | |
e6598ba4 | 1329 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
28ef6c31 | 1330 | i = si + 1; |
28ef6c31 JA |
1331 | continue; |
1332 | } | |
ccc6cda3 | 1333 | |
7117c2d2 JA |
1334 | /* Pass single-quoted and double-quoted strings through verbatim. */ |
1335 | if (c == '\'' || c == '"') | |
28ef6c31 JA |
1336 | { |
1337 | si = i + 1; | |
7117c2d2 JA |
1338 | i = (c == '\'') ? skip_single_quoted (string, slen, si) |
1339 | : skip_double_quoted (string, slen, si); | |
28ef6c31 JA |
1340 | continue; |
1341 | } | |
ccc6cda3 | 1342 | |
7117c2d2 JA |
1343 | /* move past this character, which was not special. */ |
1344 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1345 | } |
1346 | ||
d3a24ed2 | 1347 | if (c == 0 && nesting_level) |
726f6388 | 1348 | { |
d3a24ed2 CR |
1349 | if (no_longjmp_on_fatal_error == 0) |
1350 | { | |
d3a24ed2 | 1351 | last_command_exit_value = EXECUTION_FAILURE; |
7f947b68 | 1352 | report_error (_("bad substitution: no closing `%s' in %s"), closer, string); |
d3a24ed2 CR |
1353 | exp_jump_to_top_level (DISCARD); |
1354 | } | |
1355 | else | |
1356 | { | |
1357 | *sindex = i; | |
1358 | return (char *)NULL; | |
1359 | } | |
726f6388 | 1360 | } |
ccc6cda3 | 1361 | |
cce855bc | 1362 | si = i - *sindex - len_closer + 1; |
e6598ba4 | 1363 | if (flags & SX_NOALLOC) |
7117c2d2 JA |
1364 | result = (char *)NULL; |
1365 | else | |
1366 | { | |
1367 | result = (char *)xmalloc (1 + si); | |
1368 | strncpy (result, string + *sindex, si); | |
1369 | result[si] = '\0'; | |
1370 | } | |
cce855bc JA |
1371 | *sindex = i; |
1372 | ||
726f6388 JA |
1373 | return (result); |
1374 | } | |
1375 | ||
ccc6cda3 JA |
1376 | /* Extract a parameter expansion expression within ${ and } from STRING. |
1377 | Obey the Posix.2 rules for finding the ending `}': count braces while | |
1378 | skipping over enclosed quoted strings and command substitutions. | |
1379 | SINDEX is the address of an int describing the current offset in STRING; | |
1380 | it should point to just after the first `{' found. On exit, SINDEX | |
1381 | gets the position of the matching `}'. QUOTED is non-zero if this | |
1382 | occurs inside double quotes. */ | |
1383 | /* XXX -- this is very similar to extract_delimited_string -- XXX */ | |
726f6388 | 1384 | static char * |
7117c2d2 | 1385 | extract_dollar_brace_string (string, sindex, quoted, flags) |
726f6388 | 1386 | char *string; |
7117c2d2 | 1387 | int *sindex, quoted, flags; |
726f6388 | 1388 | { |
f73dda09 | 1389 | register int i, c; |
7117c2d2 | 1390 | size_t slen; |
9e51a74d | 1391 | int pass_character, nesting_level, si, dolbrace_state; |
ccc6cda3 | 1392 | char *result, *t; |
7117c2d2 | 1393 | DECLARE_MBSTATE; |
726f6388 | 1394 | |
ccc6cda3 | 1395 | pass_character = 0; |
ccc6cda3 | 1396 | nesting_level = 1; |
7117c2d2 | 1397 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 | 1398 | |
9e51a74d | 1399 | /* The handling of dolbrace_state needs to agree with the code in parse.y: |
e192f341 CR |
1400 | parse_matched_pair(). The different initial value is to handle the |
1401 | case where this function is called to parse the word in | |
1402 | ${param op word} (SX_WORD). */ | |
1403 | dolbrace_state = (flags & SX_WORD) ? DOLBRACE_WORD : DOLBRACE_PARAM; | |
1404 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && (flags & SX_POSIXEXP)) | |
1405 | dolbrace_state = DOLBRACE_QUOTE; | |
9e51a74d | 1406 | |
7117c2d2 JA |
1407 | i = *sindex; |
1408 | while (c = string[i]) | |
726f6388 | 1409 | { |
ccc6cda3 | 1410 | if (pass_character) |
726f6388 | 1411 | { |
ccc6cda3 | 1412 | pass_character = 0; |
7117c2d2 | 1413 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
1414 | continue; |
1415 | } | |
726f6388 | 1416 | |
cce855bc JA |
1417 | /* CTLESCs and backslashes quote the next character. */ |
1418 | if (c == CTLESC || c == '\\') | |
726f6388 | 1419 | { |
ccc6cda3 | 1420 | pass_character++; |
7117c2d2 | 1421 | i++; |
726f6388 JA |
1422 | continue; |
1423 | } | |
1424 | ||
cce855bc | 1425 | if (string[i] == '$' && string[i+1] == LBRACE) |
726f6388 | 1426 | { |
ccc6cda3 | 1427 | nesting_level++; |
7117c2d2 | 1428 | i += 2; |
726f6388 JA |
1429 | continue; |
1430 | } | |
1431 | ||
cce855bc | 1432 | if (c == RBRACE) |
726f6388 | 1433 | { |
ccc6cda3 JA |
1434 | nesting_level--; |
1435 | if (nesting_level == 0) | |
1436 | break; | |
7117c2d2 | 1437 | i++; |
726f6388 JA |
1438 | continue; |
1439 | } | |
1440 | ||
ccc6cda3 JA |
1441 | /* Pass the contents of old-style command substitutions through |
1442 | verbatim. */ | |
1443 | if (c == '`') | |
726f6388 | 1444 | { |
ccc6cda3 | 1445 | si = i + 1; |
e6598ba4 | 1446 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
7117c2d2 | 1447 | i = si + 1; |
ccc6cda3 JA |
1448 | continue; |
1449 | } | |
726f6388 | 1450 | |
cce855bc JA |
1451 | /* Pass the contents of new-style command substitutions and |
1452 | arithmetic substitutions through verbatim. */ | |
1453 | if (string[i] == '$' && string[i+1] == LPAREN) | |
ccc6cda3 | 1454 | { |
726f6388 | 1455 | si = i + 2; |
e33f2203 | 1456 | t = extract_command_subst (string, &si, flags|SX_NOALLOC); |
7117c2d2 | 1457 | i = si + 1; |
726f6388 JA |
1458 | continue; |
1459 | } | |
1460 | ||
9e51a74d CR |
1461 | /* Pass the contents of double-quoted strings through verbatim. */ |
1462 | if (c == '"') | |
1463 | { | |
1464 | si = i + 1; | |
1465 | i = skip_double_quoted (string, slen, si); | |
1466 | /* skip_XXX_quoted leaves index one past close quote */ | |
1467 | continue; | |
1468 | } | |
1469 | ||
1470 | if (c == '\'') | |
1471 | { | |
1472 | /*itrace("extract_dollar_brace_string: c == single quote flags = %d quoted = %d dolbrace_state = %d", flags, quoted, dolbrace_state);*/ | |
048b249e | 1473 | if (posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
9e51a74d CR |
1474 | ADVANCE_CHAR (string, slen, i); |
1475 | else | |
1476 | { | |
1477 | si = i + 1; | |
1478 | i = skip_single_quoted (string, slen, si); | |
1479 | } | |
1480 | ||
1481 | continue; | |
1482 | } | |
7117c2d2 JA |
1483 | |
1484 | /* move past this character, which was not special. */ | |
1485 | ADVANCE_CHAR (string, slen, i); | |
9e51a74d CR |
1486 | |
1487 | /* This logic must agree with parse.y:parse_matched_pair, since they | |
1488 | share the same defines. */ | |
3d35553a | 1489 | if (dolbrace_state == DOLBRACE_PARAM && c == '%' && (i - *sindex) > 1) |
9e51a74d CR |
1490 | dolbrace_state = DOLBRACE_QUOTE; |
1491 | else if (dolbrace_state == DOLBRACE_PARAM && c == '#' && (i - *sindex) > 1) | |
1492 | dolbrace_state = DOLBRACE_QUOTE; | |
3d35553a CR |
1493 | else if (dolbrace_state == DOLBRACE_PARAM && c == '/' && (i - *sindex) > 1) |
1494 | dolbrace_state = DOLBRACE_QUOTE; | |
1495 | else if (dolbrace_state == DOLBRACE_PARAM && c == '^' && (i - *sindex) > 1) | |
1496 | dolbrace_state = DOLBRACE_QUOTE; | |
1497 | else if (dolbrace_state == DOLBRACE_PARAM && c == ',' && (i - *sindex) > 1) | |
1498 | dolbrace_state = DOLBRACE_QUOTE; | |
9e51a74d CR |
1499 | else if (dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", c) != 0) |
1500 | dolbrace_state = DOLBRACE_OP; | |
1501 | else if (dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", c) == 0) | |
1502 | dolbrace_state = DOLBRACE_WORD; | |
cce855bc | 1503 | } |
726f6388 | 1504 | |
d3a24ed2 | 1505 | if (c == 0 && nesting_level) |
cce855bc | 1506 | { |
d3a24ed2 CR |
1507 | if (no_longjmp_on_fatal_error == 0) |
1508 | { /* { */ | |
d3a24ed2 | 1509 | last_command_exit_value = EXECUTION_FAILURE; |
7f947b68 | 1510 | report_error (_("bad substitution: no closing `%s' in %s"), "}", string); |
d3a24ed2 CR |
1511 | exp_jump_to_top_level (DISCARD); |
1512 | } | |
1513 | else | |
1514 | { | |
1515 | *sindex = i; | |
1516 | return ((char *)NULL); | |
1517 | } | |
726f6388 | 1518 | } |
726f6388 | 1519 | |
e6598ba4 | 1520 | result = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 JA |
1521 | *sindex = i; |
1522 | ||
ccc6cda3 | 1523 | return (result); |
726f6388 JA |
1524 | } |
1525 | ||
ccc6cda3 JA |
1526 | /* Remove backslashes which are quoting backquotes from STRING. Modifies |
1527 | STRING, and returns a pointer to it. */ | |
1528 | char * | |
1529 | de_backslash (string) | |
726f6388 | 1530 | char *string; |
ccc6cda3 | 1531 | { |
7117c2d2 JA |
1532 | register size_t slen; |
1533 | register int i, j, prev_i; | |
1534 | DECLARE_MBSTATE; | |
726f6388 | 1535 | |
7117c2d2 JA |
1536 | slen = strlen (string); |
1537 | i = j = 0; | |
1538 | ||
1539 | /* Loop copying string[i] to string[j], i >= j. */ | |
1540 | while (i < slen) | |
1541 | { | |
1542 | if (string[i] == '\\' && (string[i + 1] == '`' || string[i + 1] == '\\' || | |
ccc6cda3 | 1543 | string[i + 1] == '$')) |
7117c2d2 JA |
1544 | i++; |
1545 | prev_i = i; | |
1546 | ADVANCE_CHAR (string, slen, i); | |
1547 | if (j < prev_i) | |
704a1a2a | 1548 | do string[j++] = string[prev_i++]; while (prev_i < i); |
7117c2d2 | 1549 | else |
704a1a2a | 1550 | j = i; |
7117c2d2 JA |
1551 | } |
1552 | string[j] = '\0'; | |
1553 | ||
ccc6cda3 JA |
1554 | return (string); |
1555 | } | |
726f6388 | 1556 | |
ccc6cda3 | 1557 | #if 0 |
cce855bc | 1558 | /*UNUSED*/ |
ccc6cda3 JA |
1559 | /* Replace instances of \! in a string with !. */ |
1560 | void | |
1561 | unquote_bang (string) | |
1562 | char *string; | |
1563 | { | |
1564 | register int i, j; | |
1565 | register char *temp; | |
726f6388 | 1566 | |
f73dda09 | 1567 | temp = (char *)xmalloc (1 + strlen (string)); |
726f6388 | 1568 | |
ccc6cda3 JA |
1569 | for (i = 0, j = 0; (temp[j] = string[i]); i++, j++) |
1570 | { | |
1571 | if (string[i] == '\\' && string[i + 1] == '!') | |
1572 | { | |
1573 | temp[j] = '!'; | |
1574 | i++; | |
1575 | } | |
1576 | } | |
1577 | strcpy (string, temp); | |
1578 | free (temp); | |
726f6388 | 1579 | } |
ccc6cda3 | 1580 | #endif |
726f6388 | 1581 | |
4d8d005b CR |
1582 | #define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0) |
1583 | ||
6932f7f5 | 1584 | /* This function assumes s[i] == open; returns with s[ret] == close; used to |
3eb2d94a CR |
1585 | parse array subscripts. FLAGS & 1 means to not attempt to skip over |
1586 | matched pairs of quotes or backquotes, or skip word expansions; it is | |
1587 | intended to be used after expansion has been performed and during final | |
1588 | assignment parsing (see arrayfunc.c:assign_compound_array_list()). */ | |
6932f7f5 CR |
1589 | static int |
1590 | skip_matched_pair (string, start, open, close, flags) | |
76af2125 | 1591 | const char *string; |
6932f7f5 | 1592 | int start, open, close, flags; |
76af2125 CR |
1593 | { |
1594 | int i, pass_next, backq, si, c, count; | |
1595 | size_t slen; | |
1596 | char *temp, *ss; | |
1597 | DECLARE_MBSTATE; | |
1598 | ||
1599 | slen = strlen (string + start) + start; | |
1600 | no_longjmp_on_fatal_error = 1; | |
1601 | ||
1602 | i = start + 1; /* skip over leading bracket */ | |
1603 | count = 1; | |
1604 | pass_next = backq = 0; | |
1605 | ss = (char *)string; | |
1606 | while (c = string[i]) | |
1607 | { | |
1608 | if (pass_next) | |
1609 | { | |
1610 | pass_next = 0; | |
1611 | if (c == 0) | |
1612 | CQ_RETURN(i); | |
1613 | ADVANCE_CHAR (string, slen, i); | |
1614 | continue; | |
1615 | } | |
1616 | else if (c == '\\') | |
1617 | { | |
1618 | pass_next = 1; | |
1619 | i++; | |
1620 | continue; | |
1621 | } | |
1622 | else if (backq) | |
1623 | { | |
1624 | if (c == '`') | |
1625 | backq = 0; | |
1626 | ADVANCE_CHAR (string, slen, i); | |
1627 | continue; | |
1628 | } | |
3eb2d94a | 1629 | else if ((flags & 1) == 0 && c == '`') |
76af2125 CR |
1630 | { |
1631 | backq = 1; | |
1632 | i++; | |
1633 | continue; | |
1634 | } | |
3eb2d94a | 1635 | else if ((flags & 1) == 0 && c == open) |
76af2125 CR |
1636 | { |
1637 | count++; | |
1638 | i++; | |
1639 | continue; | |
1640 | } | |
6932f7f5 | 1641 | else if (c == close) |
76af2125 CR |
1642 | { |
1643 | count--; | |
1644 | if (count == 0) | |
1645 | break; | |
1646 | i++; | |
1647 | continue; | |
1648 | } | |
3eb2d94a | 1649 | else if ((flags & 1) == 0 && (c == '\'' || c == '"')) |
76af2125 CR |
1650 | { |
1651 | i = (c == '\'') ? skip_single_quoted (ss, slen, ++i) | |
1652 | : skip_double_quoted (ss, slen, ++i); | |
1653 | /* no increment, the skip functions increment past the closing quote. */ | |
1654 | } | |
3eb2d94a | 1655 | else if ((flags&1) == 0 && c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE)) |
76af2125 CR |
1656 | { |
1657 | si = i + 2; | |
1658 | if (string[si] == '\0') | |
1659 | CQ_RETURN(si); | |
1660 | ||
1661 | if (string[i+1] == LPAREN) | |
1662 | temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1663 | else | |
1664 | temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC); | |
1665 | i = si; | |
1666 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1667 | break; | |
1668 | i++; | |
1669 | continue; | |
1670 | } | |
1671 | else | |
1672 | ADVANCE_CHAR (string, slen, i); | |
1673 | } | |
1674 | ||
1675 | CQ_RETURN(i); | |
1676 | } | |
1677 | ||
6932f7f5 CR |
1678 | #if defined (ARRAY_VARS) |
1679 | int | |
3eb2d94a | 1680 | skipsubscript (string, start, flags) |
6932f7f5 | 1681 | const char *string; |
3eb2d94a | 1682 | int start, flags; |
6932f7f5 | 1683 | { |
3eb2d94a | 1684 | return (skip_matched_pair (string, start, '[', ']', flags)); |
6932f7f5 CR |
1685 | } |
1686 | #endif | |
1687 | ||
c2a47ea9 CR |
1688 | /* Skip characters in STRING until we find a character in DELIMS, and return |
1689 | the index of that character. START is the index into string at which we | |
1690 | begin. This is similar in spirit to strpbrk, but it returns an index into | |
1691 | STRING and takes a starting index. This little piece of code knows quite | |
1692 | a lot of shell syntax. It's very similar to skip_double_quoted and other | |
1693 | functions of that ilk. */ | |
1694 | int | |
4d8d005b | 1695 | skip_to_delim (string, start, delims, flags) |
c2a47ea9 CR |
1696 | char *string; |
1697 | int start; | |
1698 | char *delims; | |
4d8d005b | 1699 | int flags; |
c2a47ea9 | 1700 | { |
176b12ee | 1701 | int i, pass_next, backq, si, c, invert, skipquote, skipcmd; |
c2a47ea9 | 1702 | size_t slen; |
5f8cde23 | 1703 | char *temp, open[3]; |
c2a47ea9 CR |
1704 | DECLARE_MBSTATE; |
1705 | ||
1706 | slen = strlen (string + start) + start; | |
4d8d005b CR |
1707 | if (flags & SD_NOJMP) |
1708 | no_longjmp_on_fatal_error = 1; | |
8c2fef19 | 1709 | invert = (flags & SD_INVERT); |
176b12ee | 1710 | skipcmd = (flags & SD_NOSKIPCMD) == 0; |
8c2fef19 | 1711 | |
c2a47ea9 CR |
1712 | i = start; |
1713 | pass_next = backq = 0; | |
1714 | while (c = string[i]) | |
1715 | { | |
a8fd3f3e CR |
1716 | /* If this is non-zero, we should not let quote characters be delimiters |
1717 | and the current character is a single or double quote. We should not | |
1718 | test whether or not it's a delimiter until after we skip single- or | |
1719 | double-quoted strings. */ | |
1720 | skipquote = ((flags & SD_NOQUOTEDELIM) && (c == '\'' || c =='"')); | |
c2a47ea9 CR |
1721 | if (pass_next) |
1722 | { | |
1723 | pass_next = 0; | |
1724 | if (c == 0) | |
1725 | CQ_RETURN(i); | |
1726 | ADVANCE_CHAR (string, slen, i); | |
1727 | continue; | |
1728 | } | |
1729 | else if (c == '\\') | |
1730 | { | |
1731 | pass_next = 1; | |
1732 | i++; | |
1733 | continue; | |
1734 | } | |
1735 | else if (backq) | |
1736 | { | |
1737 | if (c == '`') | |
1738 | backq = 0; | |
1739 | ADVANCE_CHAR (string, slen, i); | |
1740 | continue; | |
1741 | } | |
1742 | else if (c == '`') | |
1743 | { | |
1744 | backq = 1; | |
1745 | i++; | |
1746 | continue; | |
1747 | } | |
a8fd3f3e | 1748 | else if (skipquote == 0 && invert == 0 && member (c, delims)) |
8c2fef19 | 1749 | break; |
c2a47ea9 CR |
1750 | else if (c == '\'' || c == '"') |
1751 | { | |
1752 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1753 | : skip_double_quoted (string, slen, ++i); | |
1754 | /* no increment, the skip functions increment past the closing quote. */ | |
1755 | } | |
176b12ee | 1756 | else if (c == '$' && ((skipcmd && string[i+1] == LPAREN) || string[i+1] == LBRACE)) |
c2a47ea9 CR |
1757 | { |
1758 | si = i + 2; | |
1759 | if (string[si] == '\0') | |
1760 | CQ_RETURN(si); | |
1761 | ||
1762 | if (string[i+1] == LPAREN) | |
1763 | temp = extract_delimited_string (string, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1764 | else | |
1765 | temp = extract_dollar_brace_string (string, &si, 0, SX_NOALLOC); | |
1766 | i = si; | |
1767 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1768 | break; | |
1769 | i++; | |
1770 | continue; | |
1771 | } | |
176b12ee CR |
1772 | #if defined (PROCESS_SUBSTITUTION) |
1773 | else if (skipcmd && (c == '<' || c == '>') && string[i+1] == LPAREN) | |
1774 | { | |
1775 | si = i + 2; | |
1776 | if (string[si] == '\0') | |
1777 | CQ_RETURN(si); | |
1778 | temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si); | |
631b20c6 | 1779 | free (temp); /* no SX_ALLOC here */ |
176b12ee CR |
1780 | i = si; |
1781 | if (string[i] == '\0') | |
1782 | break; | |
1783 | i++; | |
1784 | continue; | |
1785 | } | |
1786 | #endif /* PROCESS_SUBSTITUTION */ | |
5f8cde23 CR |
1787 | #if defined (EXTENDED_GLOB) |
1788 | else if ((flags & SD_EXTGLOB) && extended_glob && string[i+1] == LPAREN && member (c, "?*+!@")) | |
1789 | { | |
1790 | si = i + 2; | |
1791 | if (string[si] == '\0') | |
1792 | CQ_RETURN(si); | |
1793 | ||
1794 | open[0] = c; | |
1795 | open[1] = LPAREN; | |
1796 | open[2] = '\0'; | |
1797 | temp = extract_delimited_string (string, &si, open, "(", ")", SX_NOALLOC); /* ) */ | |
1798 | ||
1799 | i = si; | |
1800 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1801 | break; | |
1802 | i++; | |
1803 | continue; | |
1804 | } | |
1805 | #endif | |
a8fd3f3e | 1806 | else if ((skipquote || invert) && (member (c, delims) == 0)) |
c2a47ea9 CR |
1807 | break; |
1808 | else | |
1809 | ADVANCE_CHAR (string, slen, i); | |
1810 | } | |
1811 | ||
1812 | CQ_RETURN(i); | |
1813 | } | |
1814 | ||
ccc6cda3 | 1815 | #if defined (READLINE) |
726f6388 JA |
1816 | /* Return 1 if the portion of STRING ending at EINDEX is quoted (there is |
1817 | an unclosed quoted string), or if the character at EINDEX is quoted | |
28ef6c31 | 1818 | by a backslash. NO_LONGJMP_ON_FATAL_ERROR is used to flag that the various |
b72432fd | 1819 | single and double-quoted string parsing functions should not return an |
7117c2d2 JA |
1820 | error if there are unclosed quotes or braces. The characters that this |
1821 | recognizes need to be the same as the contents of | |
1822 | rl_completer_quote_characters. */ | |
b72432fd | 1823 | |
726f6388 JA |
1824 | int |
1825 | char_is_quoted (string, eindex) | |
1826 | char *string; | |
1827 | int eindex; | |
1828 | { | |
7117c2d2 JA |
1829 | int i, pass_next, c; |
1830 | size_t slen; | |
1831 | DECLARE_MBSTATE; | |
726f6388 | 1832 | |
7117c2d2 | 1833 | slen = strlen (string); |
28ef6c31 | 1834 | no_longjmp_on_fatal_error = 1; |
7117c2d2 JA |
1835 | i = pass_next = 0; |
1836 | while (i <= eindex) | |
726f6388 | 1837 | { |
7117c2d2 JA |
1838 | c = string[i]; |
1839 | ||
726f6388 JA |
1840 | if (pass_next) |
1841 | { | |
1842 | pass_next = 0; | |
1843 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
b72432fd | 1844 | CQ_RETURN(1); |
7117c2d2 | 1845 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1846 | continue; |
1847 | } | |
7117c2d2 | 1848 | else if (c == '\\') |
ccc6cda3 JA |
1849 | { |
1850 | pass_next = 1; | |
7117c2d2 | 1851 | i++; |
ccc6cda3 JA |
1852 | continue; |
1853 | } | |
7117c2d2 JA |
1854 | else if (c == '\'' || c == '"') |
1855 | { | |
1856 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1857 | : skip_double_quoted (string, slen, ++i); | |
1858 | if (i > eindex) | |
1859 | CQ_RETURN(1); | |
1860 | /* no increment, the skip_xxx functions go one past end */ | |
1861 | } | |
1862 | else | |
1863 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 1864 | } |
7117c2d2 | 1865 | |
b72432fd | 1866 | CQ_RETURN(0); |
726f6388 JA |
1867 | } |
1868 | ||
726f6388 JA |
1869 | int |
1870 | unclosed_pair (string, eindex, openstr) | |
1871 | char *string; | |
1872 | int eindex; | |
1873 | char *openstr; | |
1874 | { | |
ccc6cda3 | 1875 | int i, pass_next, openc, olen; |
7117c2d2 JA |
1876 | size_t slen; |
1877 | DECLARE_MBSTATE; | |
726f6388 | 1878 | |
7117c2d2 | 1879 | slen = strlen (string); |
726f6388 | 1880 | olen = strlen (openstr); |
7117c2d2 JA |
1881 | i = pass_next = openc = 0; |
1882 | while (i <= eindex) | |
726f6388 JA |
1883 | { |
1884 | if (pass_next) | |
1885 | { | |
1886 | pass_next = 0; | |
1887 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
1888 | return 0; | |
7117c2d2 JA |
1889 | ADVANCE_CHAR (string, slen, i); |
1890 | continue; | |
1891 | } | |
1892 | else if (string[i] == '\\') | |
1893 | { | |
1894 | pass_next = 1; | |
1895 | i++; | |
726f6388 JA |
1896 | continue; |
1897 | } | |
1898 | else if (STREQN (string + i, openstr, olen)) | |
1899 | { | |
1900 | openc = 1 - openc; | |
7117c2d2 | 1901 | i += olen; |
726f6388 | 1902 | } |
ccc6cda3 | 1903 | else if (string[i] == '\'' || string[i] == '"') |
726f6388 | 1904 | { |
7117c2d2 JA |
1905 | i = (string[i] == '\'') ? skip_single_quoted (string, slen, i) |
1906 | : skip_double_quoted (string, slen, i); | |
726f6388 JA |
1907 | if (i > eindex) |
1908 | return 0; | |
1909 | } | |
7117c2d2 JA |
1910 | else |
1911 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1912 | } |
1913 | return (openc); | |
1914 | } | |
bb70624e | 1915 | |
bb70624e JA |
1916 | /* Split STRING (length SLEN) at DELIMS, and return a WORD_LIST with the |
1917 | individual words. If DELIMS is NULL, the current value of $IFS is used | |
d3a24ed2 CR |
1918 | to split the string, and the function follows the shell field splitting |
1919 | rules. SENTINEL is an index to look for. NWP, if non-NULL, | |
bb70624e JA |
1920 | gets the number of words in the returned list. CWP, if non-NULL, gets |
1921 | the index of the word containing SENTINEL. Non-whitespace chars in | |
1922 | DELIMS delimit separate fields. */ | |
1923 | WORD_LIST * | |
a8fd3f3e | 1924 | split_at_delims (string, slen, delims, sentinel, flags, nwp, cwp) |
bb70624e JA |
1925 | char *string; |
1926 | int slen; | |
1927 | char *delims; | |
a8fd3f3e | 1928 | int sentinel, flags; |
bb70624e JA |
1929 | int *nwp, *cwp; |
1930 | { | |
a8fd3f3e | 1931 | int ts, te, i, nw, cw, ifs_split, dflags; |
f73dda09 | 1932 | char *token, *d, *d2; |
bb70624e JA |
1933 | WORD_LIST *ret, *tl; |
1934 | ||
1935 | if (string == 0 || *string == '\0') | |
1936 | { | |
1937 | if (nwp) | |
1938 | *nwp = 0; | |
1939 | if (cwp) | |
1940 | *cwp = 0; | |
1941 | return ((WORD_LIST *)NULL); | |
1942 | } | |
1943 | ||
7117c2d2 | 1944 | d = (delims == 0) ? ifs_value : delims; |
d3a24ed2 | 1945 | ifs_split = delims == 0; |
bb70624e JA |
1946 | |
1947 | /* Make d2 the non-whitespace characters in delims */ | |
1948 | d2 = 0; | |
1949 | if (delims) | |
1950 | { | |
633e5c6d CR |
1951 | size_t slength; |
1952 | #if defined (HANDLE_MULTIBYTE) | |
1953 | size_t mblength = 1; | |
1954 | #endif | |
1955 | DECLARE_MBSTATE; | |
1956 | ||
1957 | slength = strlen (delims); | |
1958 | d2 = (char *)xmalloc (slength + 1); | |
1959 | i = ts = 0; | |
1960 | while (delims[i]) | |
bb70624e | 1961 | { |
633e5c6d | 1962 | #if defined (HANDLE_MULTIBYTE) |
d3ad40de CR |
1963 | mbstate_t state_bak; |
1964 | state_bak = state; | |
633e5c6d CR |
1965 | mblength = MBRLEN (delims + i, slength, &state); |
1966 | if (MB_INVALIDCH (mblength)) | |
1967 | state = state_bak; | |
22e63b05 | 1968 | else if (mblength > 1) |
633e5c6d CR |
1969 | { |
1970 | memcpy (d2 + ts, delims + i, mblength); | |
1971 | ts += mblength; | |
1972 | i += mblength; | |
1973 | slength -= mblength; | |
1974 | continue; | |
1975 | } | |
1976 | #endif | |
1977 | if (whitespace (delims[i]) == 0) | |
bb70624e | 1978 | d2[ts++] = delims[i]; |
633e5c6d CR |
1979 | |
1980 | i++; | |
1981 | slength--; | |
bb70624e JA |
1982 | } |
1983 | d2[ts] = '\0'; | |
1984 | } | |
1985 | ||
1986 | ret = (WORD_LIST *)NULL; | |
1987 | ||
dfc21851 | 1988 | /* Remove sequences of whitespace characters at the start of the string, as |
d3a24ed2 CR |
1989 | long as those characters are delimiters. */ |
1990 | for (i = 0; member (string[i], d) && spctabnl (string[i]); i++) | |
bb70624e JA |
1991 | ; |
1992 | if (string[i] == '\0') | |
1993 | return (ret); | |
1994 | ||
1995 | ts = i; | |
1996 | nw = 0; | |
1997 | cw = -1; | |
a8fd3f3e | 1998 | dflags = flags|SD_NOJMP; |
bb70624e JA |
1999 | while (1) |
2000 | { | |
a8fd3f3e | 2001 | te = skip_to_delim (string, ts, d, dflags); |
bb70624e JA |
2002 | |
2003 | /* If we have a non-whitespace delimiter character, use it to make a | |
2004 | separate field. This is just about what $IFS splitting does and | |
2005 | is closer to the behavior of the shell parser. */ | |
28ef6c31 | 2006 | if (ts == te && d2 && member (string[ts], d2)) |
bb70624e JA |
2007 | { |
2008 | te = ts + 1; | |
d3a24ed2 CR |
2009 | /* If we're using IFS splitting, the non-whitespace delimiter char |
2010 | and any additional IFS whitespace delimits a field. */ | |
2011 | if (ifs_split) | |
2012 | while (member (string[te], d) && spctabnl (string[te])) | |
2013 | te++; | |
2014 | else | |
2015 | while (member (string[te], d2)) | |
2016 | te++; | |
bb70624e JA |
2017 | } |
2018 | ||
2019 | token = substring (string, ts, te); | |
2020 | ||
2021 | ret = add_string_to_list (token, ret); | |
2022 | free (token); | |
2023 | nw++; | |
2024 | ||
2025 | if (sentinel >= ts && sentinel <= te) | |
2026 | cw = nw; | |
2027 | ||
2028 | /* If the cursor is at whitespace just before word start, set the | |
28ef6c31 | 2029 | sentinel word to the current word. */ |
bb70624e JA |
2030 | if (cwp && cw == -1 && sentinel == ts-1) |
2031 | cw = nw; | |
2032 | ||
2033 | /* If the cursor is at whitespace between two words, make a new, empty | |
28ef6c31 JA |
2034 | word, add it before (well, after, since the list is in reverse order) |
2035 | the word we just added, and set the current word to that one. */ | |
bb70624e | 2036 | if (cwp && cw == -1 && sentinel < ts) |
28ef6c31 | 2037 | { |
7117c2d2 | 2038 | tl = make_word_list (make_word (""), ret->next); |
28ef6c31 JA |
2039 | ret->next = tl; |
2040 | cw = nw; | |
2041 | nw++; | |
2042 | } | |
bb70624e JA |
2043 | |
2044 | if (string[te] == 0) | |
2045 | break; | |
2046 | ||
d3a24ed2 CR |
2047 | i = te; |
2048 | while (member (string[i], d) && (ifs_split || spctabnl(string[i]))) | |
bb70624e JA |
2049 | i++; |
2050 | ||
2051 | if (string[i]) | |
2052 | ts = i; | |
2053 | else | |
2054 | break; | |
2055 | } | |
2056 | ||
2057 | /* Special case for SENTINEL at the end of STRING. If we haven't found | |
2058 | the word containing SENTINEL yet, and the index we're looking for is at | |
dfc21851 CR |
2059 | the end of STRING (or past the end of the previously-found token, |
2060 | possible if the end of the line is composed solely of IFS whitespace) | |
2061 | add an additional null argument and set the current word pointer to that. */ | |
2062 | if (cwp && cw == -1 && (sentinel >= slen || sentinel >= te)) | |
bb70624e JA |
2063 | { |
2064 | if (whitespace (string[sentinel - 1])) | |
28ef6c31 JA |
2065 | { |
2066 | token = ""; | |
2067 | ret = add_string_to_list (token, ret); | |
2068 | nw++; | |
2069 | } | |
bb70624e JA |
2070 | cw = nw; |
2071 | } | |
2072 | ||
2073 | if (nwp) | |
2074 | *nwp = nw; | |
2075 | if (cwp) | |
2076 | *cwp = cw; | |
2077 | ||
631b20c6 CR |
2078 | FREE (d2); |
2079 | ||
bb70624e JA |
2080 | return (REVERSE_LIST (ret, WORD_LIST *)); |
2081 | } | |
726f6388 JA |
2082 | #endif /* READLINE */ |
2083 | ||
ccc6cda3 JA |
2084 | #if 0 |
2085 | /* UNUSED */ | |
726f6388 JA |
2086 | /* Extract the name of the variable to bind to from the assignment string. */ |
2087 | char * | |
2088 | assignment_name (string) | |
2089 | char *string; | |
2090 | { | |
ccc6cda3 | 2091 | int offset; |
726f6388 JA |
2092 | char *temp; |
2093 | ||
5e13499c | 2094 | offset = assignment (string, 0); |
ccc6cda3 | 2095 | if (offset == 0) |
726f6388 | 2096 | return (char *)NULL; |
bb70624e | 2097 | temp = substring (string, 0, offset); |
726f6388 JA |
2098 | return (temp); |
2099 | } | |
ccc6cda3 | 2100 | #endif |
726f6388 | 2101 | |
cce855bc JA |
2102 | /* **************************************************************** */ |
2103 | /* */ | |
2104 | /* Functions to convert strings to WORD_LISTs and vice versa */ | |
2105 | /* */ | |
2106 | /* **************************************************************** */ | |
2107 | ||
726f6388 JA |
2108 | /* Return a single string of all the words in LIST. SEP is the separator |
2109 | to put between individual elements of LIST in the output string. */ | |
7117c2d2 | 2110 | char * |
726f6388 JA |
2111 | string_list_internal (list, sep) |
2112 | WORD_LIST *list; | |
2113 | char *sep; | |
2114 | { | |
2115 | register WORD_LIST *t; | |
2116 | char *result, *r; | |
2117 | int word_len, sep_len, result_size; | |
2118 | ||
ccc6cda3 | 2119 | if (list == 0) |
726f6388 JA |
2120 | return ((char *)NULL); |
2121 | ||
12d937f9 CR |
2122 | /* Short-circuit quickly if we don't need to separate anything. */ |
2123 | if (list->next == 0) | |
2124 | return (savestring (list->word->word)); | |
2125 | ||
726f6388 JA |
2126 | /* This is nearly always called with either sep[0] == 0 or sep[1] == 0. */ |
2127 | sep_len = STRLEN (sep); | |
2128 | result_size = 0; | |
2129 | ||
2130 | for (t = list; t; t = t->next) | |
2131 | { | |
2132 | if (t != list) | |
2133 | result_size += sep_len; | |
2134 | result_size += strlen (t->word->word); | |
2135 | } | |
2136 | ||
f73dda09 | 2137 | r = result = (char *)xmalloc (result_size + 1); |
726f6388 JA |
2138 | |
2139 | for (t = list; t; t = t->next) | |
2140 | { | |
2141 | if (t != list && sep_len) | |
2142 | { | |
ccc6cda3 JA |
2143 | if (sep_len > 1) |
2144 | { | |
2145 | FASTCOPY (sep, r, sep_len); | |
2146 | r += sep_len; | |
2147 | } | |
2148 | else | |
2149 | *r++ = sep[0]; | |
726f6388 JA |
2150 | } |
2151 | ||
2152 | word_len = strlen (t->word->word); | |
2153 | FASTCOPY (t->word->word, r, word_len); | |
2154 | r += word_len; | |
2155 | } | |
2156 | ||
ccc6cda3 | 2157 | *r = '\0'; |
726f6388 JA |
2158 | return (result); |
2159 | } | |
2160 | ||
2161 | /* Return a single string of all the words present in LIST, separating | |
2162 | each word with a space. */ | |
2163 | char * | |
2164 | string_list (list) | |
2165 | WORD_LIST *list; | |
2166 | { | |
2167 | return (string_list_internal (list, " ")); | |
2168 | } | |
2169 | ||
c2a47ea9 CR |
2170 | /* An external interface that can be used by the rest of the shell to |
2171 | obtain a string containing the first character in $IFS. Handles all | |
2172 | the multibyte complications. If LENP is non-null, it is set to the | |
2173 | length of the returned string. */ | |
2174 | char * | |
2175 | ifs_firstchar (lenp) | |
2176 | int *lenp; | |
2177 | { | |
2178 | char *ret; | |
2179 | int len; | |
2180 | ||
2181 | ret = xmalloc (MB_LEN_MAX + 1); | |
2182 | #if defined (HANDLE_MULTIBYTE) | |
2183 | if (ifs_firstc_len == 1) | |
2184 | { | |
2185 | ret[0] = ifs_firstc[0]; | |
2186 | ret[1] = '\0'; | |
2187 | len = ret[0] ? 1 : 0; | |
2188 | } | |
2189 | else | |
2190 | { | |
2191 | memcpy (ret, ifs_firstc, ifs_firstc_len); | |
2192 | ret[len = ifs_firstc_len] = '\0'; | |
2193 | } | |
2194 | #else | |
2195 | ret[0] = ifs_firstc; | |
2196 | ret[1] = '\0'; | |
2197 | len = ret[0] ? 0 : 1; | |
2198 | #endif | |
2199 | ||
2200 | if (lenp) | |
2201 | *lenp = len; | |
2202 | ||
2203 | return ret; | |
2204 | } | |
2205 | ||
726f6388 JA |
2206 | /* Return a single string of all the words present in LIST, obeying the |
2207 | quoting rules for "$*", to wit: (P1003.2, draft 11, 3.5.2) "If the | |
2208 | expansion [of $*] appears within a double quoted string, it expands | |
2209 | to a single field with the value of each parameter separated by the | |
2210 | first character of the IFS variable, or by a <space> if IFS is unset." */ | |
f73dda09 | 2211 | char * |
726f6388 JA |
2212 | string_list_dollar_star (list) |
2213 | WORD_LIST *list; | |
2214 | { | |
dc8fbaf9 | 2215 | char *ret; |
633e5c6d | 2216 | #if defined (HANDLE_MULTIBYTE) |
dc8fbaf9 | 2217 | # if defined (__GNUC__) |
633e5c6d | 2218 | char sep[MB_CUR_MAX + 1]; |
dc8fbaf9 CR |
2219 | # else |
2220 | char *sep = 0; | |
2221 | # endif | |
633e5c6d | 2222 | #else |
7117c2d2 | 2223 | char sep[2]; |
633e5c6d CR |
2224 | #endif |
2225 | ||
633e5c6d | 2226 | #if defined (HANDLE_MULTIBYTE) |
dc8fbaf9 CR |
2227 | # if !defined (__GNUC__) |
2228 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2229 | # endif /* !__GNUC__ */ | |
633e5c6d CR |
2230 | if (ifs_firstc_len == 1) |
2231 | { | |
2232 | sep[0] = ifs_firstc[0]; | |
2233 | sep[1] = '\0'; | |
2234 | } | |
2235 | else | |
da713c23 CR |
2236 | { |
2237 | memcpy (sep, ifs_firstc, ifs_firstc_len); | |
2238 | sep[ifs_firstc_len] = '\0'; | |
2239 | } | |
633e5c6d | 2240 | #else |
7117c2d2 | 2241 | sep[0] = ifs_firstc; |
726f6388 | 2242 | sep[1] = '\0'; |
633e5c6d | 2243 | #endif |
726f6388 | 2244 | |
dc8fbaf9 CR |
2245 | ret = string_list_internal (list, sep); |
2246 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2247 | free (sep); | |
2248 | #endif | |
2249 | return ret; | |
726f6388 JA |
2250 | } |
2251 | ||
cce855bc JA |
2252 | /* Turn $@ into a string. If (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
2253 | is non-zero, the $@ appears within double quotes, and we should quote | |
2254 | the list before converting it into a string. If IFS is unset, and the | |
2255 | word is not quoted, we just need to quote CTLESC and CTLNUL characters | |
2256 | in the words in the list, because the default value of $IFS is | |
2257 | <space><tab><newline>, IFS characters in the words in the list should | |
2258 | also be split. If IFS is null, and the word is not quoted, we need | |
2259 | to quote the words in the list to preserve the positional parameters | |
2260 | exactly. */ | |
f73dda09 | 2261 | char * |
cce855bc JA |
2262 | string_list_dollar_at (list, quoted) |
2263 | WORD_LIST *list; | |
2264 | int quoted; | |
2265 | { | |
227f982e | 2266 | char *ifs, *ret; |
633e5c6d | 2267 | #if defined (HANDLE_MULTIBYTE) |
dc8fbaf9 | 2268 | # if defined (__GNUC__) |
633e5c6d | 2269 | char sep[MB_CUR_MAX + 1]; |
dc8fbaf9 CR |
2270 | # else |
2271 | char *sep = 0; | |
2272 | # endif /* !__GNUC__ */ | |
633e5c6d CR |
2273 | #else |
2274 | char sep[2]; | |
2275 | #endif | |
cce855bc JA |
2276 | WORD_LIST *tlist; |
2277 | ||
7117c2d2 JA |
2278 | /* XXX this could just be ifs = ifs_value; */ |
2279 | ifs = ifs_var ? value_cell (ifs_var) : (char *)0; | |
cce855bc | 2280 | |
633e5c6d | 2281 | #if defined (HANDLE_MULTIBYTE) |
dc8fbaf9 CR |
2282 | # if !defined (__GNUC__) |
2283 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2284 | # endif /* !__GNUC__ */ | |
633e5c6d CR |
2285 | if (ifs && *ifs) |
2286 | { | |
227f982e | 2287 | if (ifs_firstc_len == 1) |
633e5c6d | 2288 | { |
227f982e | 2289 | sep[0] = ifs_firstc[0]; |
633e5c6d CR |
2290 | sep[1] = '\0'; |
2291 | } | |
2292 | else | |
2293 | { | |
227f982e CR |
2294 | memcpy (sep, ifs_firstc, ifs_firstc_len); |
2295 | sep[ifs_firstc_len] = '\0'; | |
633e5c6d CR |
2296 | } |
2297 | } | |
2298 | else | |
2299 | { | |
2300 | sep[0] = ' '; | |
2301 | sep[1] = '\0'; | |
2302 | } | |
2303 | #else | |
cce855bc JA |
2304 | sep[0] = (ifs == 0 || *ifs == 0) ? ' ' : *ifs; |
2305 | sep[1] = '\0'; | |
633e5c6d | 2306 | #endif |
cce855bc | 2307 | |
d3ad40de CR |
2308 | /* XXX -- why call quote_list if ifs == 0? we can get away without doing |
2309 | it now that quote_escapes quotes spaces */ | |
1231ac47 | 2310 | tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
cce855bc JA |
2311 | ? quote_list (list) |
2312 | : list_quote_escapes (list); | |
dc8fbaf9 CR |
2313 | |
2314 | ret = string_list_internal (tlist, sep); | |
2315 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2316 | free (sep); | |
2317 | #endif | |
2318 | return ret; | |
cce855bc JA |
2319 | } |
2320 | ||
e33f2203 CR |
2321 | /* Turn the positional paramters into a string, understanding quoting and |
2322 | the various subtleties of using the first character of $IFS as the | |
2323 | separator. Calls string_list_dollar_at, string_list_dollar_star, and | |
2324 | string_list as appropriate. */ | |
2325 | char * | |
2326 | string_list_pos_params (pchar, list, quoted) | |
2327 | int pchar; | |
2328 | WORD_LIST *list; | |
2329 | int quoted; | |
2330 | { | |
2331 | char *ret; | |
2332 | WORD_LIST *tlist; | |
2333 | ||
2334 | if (pchar == '*' && (quoted & Q_DOUBLE_QUOTES)) | |
2335 | { | |
2336 | tlist = quote_list (list); | |
2337 | word_list_remove_quoted_nulls (tlist); | |
2338 | ret = string_list_dollar_star (tlist); | |
2339 | } | |
2340 | else if (pchar == '*' && (quoted & Q_HERE_DOCUMENT)) | |
2341 | { | |
2342 | tlist = quote_list (list); | |
2343 | word_list_remove_quoted_nulls (tlist); | |
2344 | ret = string_list (tlist); | |
2345 | } | |
2346 | else if (pchar == '*') | |
2347 | { | |
2348 | /* Even when unquoted, string_list_dollar_star does the right thing | |
2349 | making sure that the first character of $IFS is used as the | |
2350 | separator. */ | |
2351 | ret = string_list_dollar_star (list); | |
2352 | } | |
2353 | else if (pchar == '@' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
2354 | /* We use string_list_dollar_at, but only if the string is quoted, since | |
2355 | that quotes the escapes if it's not, which we don't want. We could | |
2356 | use string_list (the old code did), but that doesn't do the right | |
2357 | thing if the first character of $IFS is not a space. We use | |
2358 | string_list_dollar_star if the string is unquoted so we make sure that | |
2359 | the elements of $@ are separated by the first character of $IFS for | |
2360 | later splitting. */ | |
2361 | ret = string_list_dollar_at (list, quoted); | |
2362 | else if (pchar == '@') | |
2363 | ret = string_list_dollar_star (list); | |
2364 | else | |
2365 | ret = string_list ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? quote_list (list) : list); | |
2366 | ||
2367 | return ret; | |
2368 | } | |
2369 | ||
726f6388 JA |
2370 | /* Return the list of words present in STRING. Separate the string into |
2371 | words at any of the characters found in SEPARATORS. If QUOTED is | |
2372 | non-zero then word in the list will have its quoted flag set, otherwise | |
2373 | the quoted flag is left as make_word () deemed fit. | |
2374 | ||
2375 | This obeys the P1003.2 word splitting semantics. If `separators' is | |
2376 | exactly <space><tab><newline>, then the splitting algorithm is that of | |
2377 | the Bourne shell, which treats any sequence of characters from `separators' | |
2378 | as a delimiter. If IFS is unset, which results in `separators' being set | |
2379 | to "", no splitting occurs. If separators has some other value, the | |
2380 | following rules are applied (`IFS white space' means zero or more | |
2381 | occurrences of <space>, <tab>, or <newline>, as long as those characters | |
2382 | are in `separators'): | |
2383 | ||
2384 | 1) IFS white space is ignored at the start and the end of the | |
2385 | string. | |
2386 | 2) Each occurrence of a character in `separators' that is not | |
2387 | IFS white space, along with any adjacent occurrences of | |
2388 | IFS white space delimits a field. | |
2389 | 3) Any nonzero-length sequence of IFS white space delimits a field. | |
2390 | */ | |
2391 | ||
2392 | /* BEWARE! list_string strips null arguments. Don't call it twice and | |
2393 | expect to have "" preserved! */ | |
2394 | ||
726f6388 JA |
2395 | /* This performs word splitting and quoted null character removal on |
2396 | STRING. */ | |
d3a24ed2 CR |
2397 | #define issep(c) \ |
2398 | (((separators)[0]) ? ((separators)[1] ? isifs(c) \ | |
2399 | : (c) == (separators)[0]) \ | |
2400 | : 0) | |
726f6388 JA |
2401 | |
2402 | WORD_LIST * | |
2403 | list_string (string, separators, quoted) | |
2404 | register char *string, *separators; | |
2405 | int quoted; | |
2406 | { | |
ccc6cda3 JA |
2407 | WORD_LIST *result; |
2408 | WORD_DESC *t; | |
2409 | char *current_word, *s; | |
e6598ba4 | 2410 | int sindex, sh_style_split, whitesep, xflags; |
633e5c6d | 2411 | size_t slen; |
726f6388 JA |
2412 | |
2413 | if (!string || !*string) | |
2414 | return ((WORD_LIST *)NULL); | |
2415 | ||
7117c2d2 JA |
2416 | sh_style_split = separators && separators[0] == ' ' && |
2417 | separators[1] == '\t' && | |
2418 | separators[2] == '\n' && | |
2419 | separators[3] == '\0'; | |
e6598ba4 CR |
2420 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2421 | { | |
2422 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2423 | else if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2424 | } | |
726f6388 | 2425 | |
633e5c6d | 2426 | slen = 0; |
726f6388 JA |
2427 | /* Remove sequences of whitespace at the beginning of STRING, as |
2428 | long as those characters appear in IFS. Do not do this if | |
2429 | STRING is quoted or if there are no separator characters. */ | |
2430 | if (!quoted || !separators || !*separators) | |
2431 | { | |
2432 | for (s = string; *s && spctabnl (*s) && issep (*s); s++); | |
2433 | ||
2434 | if (!*s) | |
2435 | return ((WORD_LIST *)NULL); | |
2436 | ||
2437 | string = s; | |
2438 | } | |
2439 | ||
2440 | /* OK, now STRING points to a word that does not begin with white space. | |
2441 | The splitting algorithm is: | |
7117c2d2 JA |
2442 | extract a word, stopping at a separator |
2443 | skip sequences of spc, tab, or nl as long as they are separators | |
726f6388 | 2444 | This obeys the field splitting rules in Posix.2. */ |
da713c23 | 2445 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 1; |
ccc6cda3 | 2446 | for (result = (WORD_LIST *)NULL, sindex = 0; string[sindex]; ) |
726f6388 | 2447 | { |
da713c23 CR |
2448 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2449 | unless multibyte chars are possible. */ | |
e6598ba4 | 2450 | current_word = string_extract_verbatim (string, slen, &sindex, separators, xflags); |
ccc6cda3 | 2451 | if (current_word == 0) |
726f6388 JA |
2452 | break; |
2453 | ||
2454 | /* If we have a quoted empty string, add a quoted null argument. We | |
2455 | want to preserve the quoted null character iff this is a quoted | |
2456 | empty string; otherwise the quoted null characters are removed | |
2457 | below. */ | |
2458 | if (QUOTED_NULL (current_word)) | |
2459 | { | |
227f982e | 2460 | t = alloc_word_desc (); |
726f6388 | 2461 | t->word = make_quoted_char ('\0'); |
227f982e | 2462 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
726f6388 JA |
2463 | result = make_word_list (t, result); |
2464 | } | |
ccc6cda3 | 2465 | else if (current_word[0] != '\0') |
726f6388 JA |
2466 | { |
2467 | /* If we have something, then add it regardless. However, | |
2468 | perform quoted null character removal on the current word. */ | |
2469 | remove_quoted_nulls (current_word); | |
cce855bc | 2470 | result = add_string_to_list (current_word, result); |
227f982e | 2471 | result->word->flags &= ~W_HASQUOTEDNULL; /* just to be sure */ |
ccc6cda3 JA |
2472 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) |
2473 | result->word->flags |= W_QUOTED; | |
726f6388 JA |
2474 | } |
2475 | ||
2476 | /* If we're not doing sequences of separators in the traditional | |
2477 | Bourne shell style, then add a quoted null argument. */ | |
726f6388 JA |
2478 | else if (!sh_style_split && !spctabnl (string[sindex])) |
2479 | { | |
227f982e | 2480 | t = alloc_word_desc (); |
ccc6cda3 | 2481 | t->word = make_quoted_char ('\0'); |
227f982e | 2482 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
ccc6cda3 | 2483 | result = make_word_list (t, result); |
726f6388 JA |
2484 | } |
2485 | ||
2486 | free (current_word); | |
2487 | ||
28ef6c31 JA |
2488 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2489 | whitesep = string[sindex] && spctabnl (string[sindex]); | |
2490 | ||
726f6388 JA |
2491 | /* Move past the current separator character. */ |
2492 | if (string[sindex]) | |
633e5c6d CR |
2493 | { |
2494 | DECLARE_MBSTATE; | |
633e5c6d CR |
2495 | ADVANCE_CHAR (string, slen, sindex); |
2496 | } | |
726f6388 JA |
2497 | |
2498 | /* Now skip sequences of space, tab, or newline characters if they are | |
2499 | in the list of separators. */ | |
2500 | while (string[sindex] && spctabnl (string[sindex]) && issep (string[sindex])) | |
2501 | sindex++; | |
28ef6c31 | 2502 | |
7117c2d2 JA |
2503 | /* If the first separator was IFS whitespace and the current character |
2504 | is a non-whitespace IFS character, it should be part of the current | |
2505 | field delimiter, not a separate delimiter that would result in an | |
2506 | empty field. Look at POSIX.2, 3.6.5, (3)(b). */ | |
28ef6c31 | 2507 | if (string[sindex] && whitesep && issep (string[sindex]) && !spctabnl (string[sindex])) |
9d2b70f0 CR |
2508 | { |
2509 | sindex++; | |
2510 | /* An IFS character that is not IFS white space, along with any | |
2511 | adjacent IFS white space, shall delimit a field. (SUSv3) */ | |
d3ad40de | 2512 | while (string[sindex] && spctabnl (string[sindex]) && isifs (string[sindex])) |
9d2b70f0 CR |
2513 | sindex++; |
2514 | } | |
726f6388 JA |
2515 | } |
2516 | return (REVERSE_LIST (result, WORD_LIST *)); | |
2517 | } | |
2518 | ||
2519 | /* Parse a single word from STRING, using SEPARATORS to separate fields. | |
2520 | ENDPTR is set to the first character after the word. This is used by | |
7117c2d2 JA |
2521 | the `read' builtin. This is never called with SEPARATORS != $IFS; |
2522 | it should be simplified. | |
2523 | ||
726f6388 JA |
2524 | XXX - this function is very similar to list_string; they should be |
2525 | combined - XXX */ | |
2526 | char * | |
2527 | get_word_from_string (stringp, separators, endptr) | |
2528 | char **stringp, *separators, **endptr; | |
2529 | { | |
2530 | register char *s; | |
2531 | char *current_word; | |
e6598ba4 | 2532 | int sindex, sh_style_split, whitesep, xflags; |
633e5c6d | 2533 | size_t slen; |
726f6388 JA |
2534 | |
2535 | if (!stringp || !*stringp || !**stringp) | |
2536 | return ((char *)NULL); | |
ccc6cda3 | 2537 | |
7117c2d2 JA |
2538 | sh_style_split = separators && separators[0] == ' ' && |
2539 | separators[1] == '\t' && | |
2540 | separators[2] == '\n' && | |
2541 | separators[3] == '\0'; | |
e6598ba4 CR |
2542 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2543 | { | |
2544 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2545 | if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2546 | } | |
726f6388 | 2547 | |
e6598ba4 | 2548 | s = *stringp; |
633e5c6d CR |
2549 | slen = 0; |
2550 | ||
726f6388 JA |
2551 | /* Remove sequences of whitespace at the beginning of STRING, as |
2552 | long as those characters appear in IFS. */ | |
2553 | if (sh_style_split || !separators || !*separators) | |
2554 | { | |
7117c2d2 | 2555 | for (; *s && spctabnl (*s) && isifs (*s); s++); |
726f6388 JA |
2556 | |
2557 | /* If the string is nothing but whitespace, update it and return. */ | |
2558 | if (!*s) | |
2559 | { | |
2560 | *stringp = s; | |
2561 | if (endptr) | |
2562 | *endptr = s; | |
2563 | return ((char *)NULL); | |
2564 | } | |
2565 | } | |
2566 | ||
2567 | /* OK, S points to a word that does not begin with white space. | |
2568 | Now extract a word, stopping at a separator, save a pointer to | |
2569 | the first character after the word, then skip sequences of spc, | |
2570 | tab, or nl as long as they are separators. | |
ccc6cda3 | 2571 | |
726f6388 JA |
2572 | This obeys the field splitting rules in Posix.2. */ |
2573 | sindex = 0; | |
da713c23 CR |
2574 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2575 | unless multibyte chars are possible. */ | |
2576 | slen = (MB_CUR_MAX > 1) ? strlen (s) : 1; | |
e6598ba4 | 2577 | current_word = string_extract_verbatim (s, slen, &sindex, separators, xflags); |
726f6388 JA |
2578 | |
2579 | /* Set ENDPTR to the first character after the end of the word. */ | |
2580 | if (endptr) | |
2581 | *endptr = s + sindex; | |
2582 | ||
28ef6c31 JA |
2583 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2584 | whitesep = s[sindex] && spctabnl (s[sindex]); | |
2585 | ||
726f6388 JA |
2586 | /* Move past the current separator character. */ |
2587 | if (s[sindex]) | |
633e5c6d CR |
2588 | { |
2589 | DECLARE_MBSTATE; | |
633e5c6d CR |
2590 | ADVANCE_CHAR (s, slen, sindex); |
2591 | } | |
726f6388 JA |
2592 | |
2593 | /* Now skip sequences of space, tab, or newline characters if they are | |
2594 | in the list of separators. */ | |
7117c2d2 | 2595 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) |
726f6388 JA |
2596 | sindex++; |
2597 | ||
28ef6c31 JA |
2598 | /* If the first separator was IFS whitespace and the current character is |
2599 | a non-whitespace IFS character, it should be part of the current field | |
2600 | delimiter, not a separate delimiter that would result in an empty field. | |
2601 | Look at POSIX.2, 3.6.5, (3)(b). */ | |
7117c2d2 | 2602 | if (s[sindex] && whitesep && isifs (s[sindex]) && !spctabnl (s[sindex])) |
9d2b70f0 CR |
2603 | { |
2604 | sindex++; | |
2605 | /* An IFS character that is not IFS white space, along with any adjacent | |
2606 | IFS white space, shall delimit a field. */ | |
2607 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) | |
2608 | sindex++; | |
2609 | } | |
28ef6c31 | 2610 | |
726f6388 JA |
2611 | /* Update STRING to point to the next field. */ |
2612 | *stringp = s + sindex; | |
2613 | return (current_word); | |
2614 | } | |
2615 | ||
2616 | /* Remove IFS white space at the end of STRING. Start at the end | |
2617 | of the string and walk backwards until the beginning of the string | |
2618 | or we find a character that's not IFS white space and not CTLESC. | |
2619 | Only let CTLESC escape a white space character if SAW_ESCAPE is | |
2620 | non-zero. */ | |
2621 | char * | |
2622 | strip_trailing_ifs_whitespace (string, separators, saw_escape) | |
2623 | char *string, *separators; | |
2624 | int saw_escape; | |
2625 | { | |
2626 | char *s; | |
ccc6cda3 | 2627 | |
726f6388 | 2628 | s = string + STRLEN (string) - 1; |
7117c2d2 | 2629 | while (s > string && ((spctabnl (*s) && isifs (*s)) || |
726f6388 JA |
2630 | (saw_escape && *s == CTLESC && spctabnl (s[1])))) |
2631 | s--; | |
2632 | *++s = '\0'; | |
2633 | return string; | |
2634 | } | |
2635 | ||
bb70624e JA |
2636 | #if 0 |
2637 | /* UNUSED */ | |
2638 | /* Split STRING into words at whitespace. Obeys shell-style quoting with | |
2639 | backslashes, single and double quotes. */ | |
ccc6cda3 JA |
2640 | WORD_LIST * |
2641 | list_string_with_quotes (string) | |
2642 | char *string; | |
2643 | { | |
2644 | WORD_LIST *list; | |
2645 | char *token, *s; | |
7117c2d2 | 2646 | size_t s_len; |
ccc6cda3 JA |
2647 | int c, i, tokstart, len; |
2648 | ||
2649 | for (s = string; s && *s && spctabnl (*s); s++) | |
2650 | ; | |
2651 | if (s == 0 || *s == 0) | |
2652 | return ((WORD_LIST *)NULL); | |
2653 | ||
7117c2d2 | 2654 | s_len = strlen (s); |
ccc6cda3 JA |
2655 | tokstart = i = 0; |
2656 | list = (WORD_LIST *)NULL; | |
2657 | while (1) | |
2658 | { | |
2659 | c = s[i]; | |
2660 | if (c == '\\') | |
2661 | { | |
2662 | i++; | |
2663 | if (s[i]) | |
2664 | i++; | |
2665 | } | |
2666 | else if (c == '\'') | |
7117c2d2 | 2667 | i = skip_single_quoted (s, s_len, ++i); |
ccc6cda3 | 2668 | else if (c == '"') |
7117c2d2 | 2669 | i = skip_double_quoted (s, s_len, ++i); |
ccc6cda3 JA |
2670 | else if (c == 0 || spctabnl (c)) |
2671 | { | |
2672 | /* We have found the end of a token. Make a word out of it and | |
2673 | add it to the word list. */ | |
bb70624e | 2674 | token = substring (s, tokstart, i); |
cce855bc | 2675 | list = add_string_to_list (token, list); |
ccc6cda3 JA |
2676 | free (token); |
2677 | while (spctabnl (s[i])) | |
2678 | i++; | |
2679 | if (s[i]) | |
2680 | tokstart = i; | |
2681 | else | |
2682 | break; | |
2683 | } | |
2684 | else | |
2685 | i++; /* normal character */ | |
2686 | } | |
2687 | return (REVERSE_LIST (list, WORD_LIST *)); | |
2688 | } | |
bb70624e | 2689 | #endif |
d166f048 | 2690 | |
cce855bc JA |
2691 | /********************************************************/ |
2692 | /* */ | |
2693 | /* Functions to perform assignment statements */ | |
2694 | /* */ | |
2695 | /********************************************************/ | |
d166f048 | 2696 | |
43df7bbb CR |
2697 | #if defined (ARRAY_VARS) |
2698 | static SHELL_VAR * | |
d11b8b46 | 2699 | do_compound_assignment (name, value, flags) |
43df7bbb | 2700 | char *name, *value; |
d11b8b46 | 2701 | int flags; |
43df7bbb CR |
2702 | { |
2703 | SHELL_VAR *v; | |
36eb585c | 2704 | int mklocal, mkassoc, mkglobal; |
d3ad40de | 2705 | WORD_LIST *list; |
d11b8b46 CR |
2706 | |
2707 | mklocal = flags & ASS_MKLOCAL; | |
09767ff0 | 2708 | mkassoc = flags & ASS_MKASSOC; |
36eb585c | 2709 | mkglobal = flags & ASS_MKGLOBAL; |
43df7bbb CR |
2710 | |
2711 | if (mklocal && variable_context) | |
2712 | { | |
2713 | v = find_variable (name); | |
fdf670ea | 2714 | list = expand_compound_array_assignment (v, value, flags); |
09767ff0 CR |
2715 | if (mkassoc) |
2716 | v = make_local_assoc_variable (name); | |
2717 | else if (v == 0 || (array_p (v) == 0 && assoc_p (v) == 0) || v->context != variable_context) | |
7f947b68 | 2718 | v = make_local_array_variable (name, 0); |
73a146be CR |
2719 | if (v) |
2720 | assign_compound_array_list (v, list, flags); | |
43df7bbb | 2721 | } |
36eb585c CR |
2722 | /* In a function but forcing assignment in global context */ |
2723 | else if (mkglobal && variable_context) | |
2724 | { | |
2725 | v = find_global_variable (name); | |
2726 | list = expand_compound_array_assignment (v, value, flags); | |
2727 | if (v == 0 && mkassoc) | |
2728 | v = make_new_assoc_variable (name); | |
2729 | else if (v && mkassoc && assoc_p (v) == 0) | |
2730 | v = convert_var_to_assoc (v); | |
2731 | else if (v == 0) | |
2732 | v = make_new_array_variable (name); | |
1a81420a | 2733 | else if (v && mkassoc == 0 && array_p (v) == 0) |
36eb585c | 2734 | v = convert_var_to_array (v); |
73a146be CR |
2735 | if (v) |
2736 | assign_compound_array_list (v, list, flags); | |
36eb585c | 2737 | } |
43df7bbb | 2738 | else |
d11b8b46 | 2739 | v = assign_array_from_string (name, value, flags); |
43df7bbb CR |
2740 | |
2741 | return (v); | |
2742 | } | |
2743 | #endif | |
2744 | ||
726f6388 JA |
2745 | /* Given STRING, an assignment string, get the value of the right side |
2746 | of the `=', and bind it to the left side. If EXPAND is true, then | |
2747 | perform parameter expansion, command substitution, and arithmetic | |
2748 | expansion on the right-hand side. Perform tilde expansion in any | |
2749 | case. Do not perform word splitting on the result of expansion. */ | |
2750 | static int | |
43df7bbb CR |
2751 | do_assignment_internal (word, expand) |
2752 | const WORD_DESC *word; | |
726f6388 JA |
2753 | int expand; |
2754 | { | |
3d8cce26 CR |
2755 | int offset, appendop, assign_list, aflags, retval; |
2756 | char *name, *value, *temp; | |
ccc6cda3 JA |
2757 | SHELL_VAR *entry; |
2758 | #if defined (ARRAY_VARS) | |
2759 | char *t; | |
1d7ecd77 | 2760 | int ni; |
ccc6cda3 | 2761 | #endif |
43df7bbb | 2762 | const char *string; |
ccc6cda3 | 2763 | |
43df7bbb CR |
2764 | if (word == 0 || word->word == 0) |
2765 | return 0; | |
2766 | ||
d11b8b46 | 2767 | appendop = assign_list = aflags = 0; |
43df7bbb | 2768 | string = word->word; |
5e13499c | 2769 | offset = assignment (string, 0); |
ccc6cda3 JA |
2770 | name = savestring (string); |
2771 | value = (char *)NULL; | |
726f6388 JA |
2772 | |
2773 | if (name[offset] == '=') | |
2774 | { | |
d11b8b46 CR |
2775 | if (name[offset - 1] == '+') |
2776 | { | |
2777 | appendop = 1; | |
2778 | name[offset - 1] = '\0'; | |
2779 | } | |
2780 | ||
2781 | name[offset] = 0; /* might need this set later */ | |
726f6388 JA |
2782 | temp = name + offset + 1; |
2783 | ||
ccc6cda3 | 2784 | #if defined (ARRAY_VARS) |
43df7bbb | 2785 | if (expand && (word->flags & W_COMPASSIGN)) |
726f6388 | 2786 | { |
ccc6cda3 | 2787 | assign_list = ni = 1; |
43df7bbb | 2788 | value = extract_array_assignment_list (temp, &ni); |
ccc6cda3 JA |
2789 | } |
2790 | else | |
2791 | #endif | |
ccc6cda3 | 2792 | if (expand && temp[0]) |
22e63b05 | 2793 | value = expand_string_if_necessary (temp, 0, expand_string_assignment); |
726f6388 JA |
2794 | else |
2795 | value = savestring (temp); | |
2796 | } | |
2797 | ||
2798 | if (value == 0) | |
d166f048 | 2799 | { |
f73dda09 | 2800 | value = (char *)xmalloc (1); |
d166f048 JA |
2801 | value[0] = '\0'; |
2802 | } | |
726f6388 | 2803 | |
726f6388 | 2804 | if (echo_command_at_execute) |
d11b8b46 CR |
2805 | { |
2806 | if (appendop) | |
2807 | name[offset - 1] = '+'; | |
2808 | xtrace_print_assignment (name, value, assign_list, 1); | |
2809 | if (appendop) | |
2810 | name[offset - 1] = '\0'; | |
2811 | } | |
726f6388 | 2812 | |
d166f048 | 2813 | #define ASSIGN_RETURN(r) do { FREE (value); free (name); return (r); } while (0) |
ccc6cda3 | 2814 | |
d11b8b46 CR |
2815 | if (appendop) |
2816 | aflags |= ASS_APPEND; | |
2817 | ||
ccc6cda3 | 2818 | #if defined (ARRAY_VARS) |
d0ca3503 | 2819 | if (t = mbschr (name, '[')) /*]*/ |
ccc6cda3 JA |
2820 | { |
2821 | if (assign_list) | |
2822 | { | |
5e13499c | 2823 | report_error (_("%s: cannot assign list to array member"), name); |
ccc6cda3 JA |
2824 | ASSIGN_RETURN (0); |
2825 | } | |
d11b8b46 | 2826 | entry = assign_array_element (name, value, aflags); |
ccc6cda3 | 2827 | if (entry == 0) |
28ef6c31 | 2828 | ASSIGN_RETURN (0); |
ccc6cda3 JA |
2829 | } |
2830 | else if (assign_list) | |
d11b8b46 | 2831 | { |
ec860d76 | 2832 | if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL) == 0) |
d11b8b46 | 2833 | aflags |= ASS_MKLOCAL; |
36eb585c CR |
2834 | if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL)) |
2835 | aflags |= ASS_MKGLOBAL; | |
09767ff0 CR |
2836 | if (word->flags & W_ASSIGNASSOC) |
2837 | aflags |= ASS_MKASSOC; | |
d11b8b46 CR |
2838 | entry = do_compound_assignment (name, value, aflags); |
2839 | } | |
ccc6cda3 JA |
2840 | else |
2841 | #endif /* ARRAY_VARS */ | |
d11b8b46 | 2842 | entry = bind_variable (name, value, aflags); |
ccc6cda3 | 2843 | |
726f6388 JA |
2844 | stupidly_hack_special_variables (name); |
2845 | ||
cb603128 CR |
2846 | /* Return 1 if the assignment seems to have been performed correctly. */ |
2847 | if (entry == 0 || readonly_p (entry)) | |
2848 | retval = 0; /* assignment failure */ | |
2849 | else if (noassign_p (entry)) | |
2850 | { | |
2851 | last_command_exit_value = EXECUTION_FAILURE; | |
2852 | retval = 1; /* error status, but not assignment failure */ | |
2853 | } | |
2854 | else | |
2855 | retval = 1; | |
cb603128 | 2856 | |
09767ff0 | 2857 | if (entry && retval != 0 && noassign_p (entry) == 0) |
cb603128 | 2858 | VUNSETATTR (entry, att_invisible); |
09767ff0 CR |
2859 | |
2860 | ASSIGN_RETURN (retval); | |
726f6388 JA |
2861 | } |
2862 | ||
2863 | /* Perform the assignment statement in STRING, and expand the | |
43df7bbb | 2864 | right side by doing tilde, command and parameter expansion. */ |
ccc6cda3 | 2865 | int |
726f6388 | 2866 | do_assignment (string) |
43df7bbb | 2867 | char *string; |
726f6388 | 2868 | { |
43df7bbb CR |
2869 | WORD_DESC td; |
2870 | ||
2871 | td.flags = W_ASSIGNMENT; | |
2872 | td.word = string; | |
2873 | ||
2874 | return do_assignment_internal (&td, 1); | |
2875 | } | |
2876 | ||
2877 | int | |
adc6cff5 | 2878 | do_word_assignment (word, flags) |
43df7bbb | 2879 | WORD_DESC *word; |
adc6cff5 | 2880 | int flags; |
43df7bbb CR |
2881 | { |
2882 | return do_assignment_internal (word, 1); | |
726f6388 JA |
2883 | } |
2884 | ||
2885 | /* Given STRING, an assignment string, get the value of the right side | |
43df7bbb CR |
2886 | of the `=', and bind it to the left side. Do not perform any word |
2887 | expansions on the right hand side. */ | |
ccc6cda3 | 2888 | int |
726f6388 | 2889 | do_assignment_no_expand (string) |
43df7bbb | 2890 | char *string; |
726f6388 | 2891 | { |
43df7bbb CR |
2892 | WORD_DESC td; |
2893 | ||
2894 | td.flags = W_ASSIGNMENT; | |
2895 | td.word = string; | |
2896 | ||
e225d5a9 | 2897 | return (do_assignment_internal (&td, 0)); |
726f6388 JA |
2898 | } |
2899 | ||
cce855bc JA |
2900 | /*************************************************** |
2901 | * * | |
2902 | * Functions to manage the positional parameters * | |
2903 | * * | |
2904 | ***************************************************/ | |
726f6388 JA |
2905 | |
2906 | /* Return the word list that corresponds to `$*'. */ | |
2907 | WORD_LIST * | |
2908 | list_rest_of_args () | |
2909 | { | |
e3af9370 | 2910 | register WORD_LIST *list, *args; |
726f6388 JA |
2911 | int i; |
2912 | ||
2913 | /* Break out of the loop as soon as one of the dollar variables is null. */ | |
ccc6cda3 | 2914 | for (i = 1, list = (WORD_LIST *)NULL; i < 10 && dollar_vars[i]; i++) |
e3af9370 | 2915 | list = make_word_list (make_bare_word (dollar_vars[i]), list); |
ccc6cda3 JA |
2916 | |
2917 | for (args = rest_of_args; args; args = args->next) | |
e3af9370 | 2918 | list = make_word_list (make_bare_word (args->word->word), list); |
726f6388 | 2919 | |
e3af9370 | 2920 | return (REVERSE_LIST (list, WORD_LIST *)); |
726f6388 JA |
2921 | } |
2922 | ||
ccc6cda3 JA |
2923 | int |
2924 | number_of_args () | |
2925 | { | |
2926 | register WORD_LIST *list; | |
2927 | int n; | |
2928 | ||
2929 | for (n = 0; n < 9 && dollar_vars[n+1]; n++) | |
2930 | ; | |
2931 | for (list = rest_of_args; list; list = list->next) | |
2932 | n++; | |
2933 | return n; | |
2934 | } | |
2935 | ||
cce855bc JA |
2936 | /* Return the value of a positional parameter. This handles values > 10. */ |
2937 | char * | |
2938 | get_dollar_var_value (ind) | |
7117c2d2 | 2939 | intmax_t ind; |
cce855bc JA |
2940 | { |
2941 | char *temp; | |
2942 | WORD_LIST *p; | |
2943 | ||
2944 | if (ind < 10) | |
2945 | temp = dollar_vars[ind] ? savestring (dollar_vars[ind]) : (char *)NULL; | |
2946 | else /* We want something like ${11} */ | |
2947 | { | |
2948 | ind -= 10; | |
2949 | for (p = rest_of_args; p && ind--; p = p->next) | |
28ef6c31 | 2950 | ; |
cce855bc JA |
2951 | temp = p ? savestring (p->word->word) : (char *)NULL; |
2952 | } | |
2953 | return (temp); | |
2954 | } | |
2955 | ||
726f6388 JA |
2956 | /* Make a single large string out of the dollar digit variables, |
2957 | and the rest_of_args. If DOLLAR_STAR is 1, then obey the special | |
2958 | case of "$*" with respect to IFS. */ | |
2959 | char * | |
2960 | string_rest_of_args (dollar_star) | |
2961 | int dollar_star; | |
2962 | { | |
ccc6cda3 | 2963 | register WORD_LIST *list; |
726f6388 JA |
2964 | char *string; |
2965 | ||
ccc6cda3 | 2966 | list = list_rest_of_args (); |
726f6388 JA |
2967 | string = dollar_star ? string_list_dollar_star (list) : string_list (list); |
2968 | dispose_words (list); | |
2969 | return (string); | |
2970 | } | |
2971 | ||
cce855bc JA |
2972 | /* Return a string containing the positional parameters from START to |
2973 | END, inclusive. If STRING[0] == '*', we obey the rules for $*, | |
7117c2d2 JA |
2974 | which only makes a difference if QUOTED is non-zero. If QUOTED includes |
2975 | Q_HERE_DOCUMENT or Q_DOUBLE_QUOTES, this returns a quoted list, otherwise | |
2976 | no quoting chars are added. */ | |
cce855bc JA |
2977 | static char * |
2978 | pos_params (string, start, end, quoted) | |
2979 | char *string; | |
2980 | int start, end, quoted; | |
726f6388 | 2981 | { |
cce855bc JA |
2982 | WORD_LIST *save, *params, *h, *t; |
2983 | char *ret; | |
2984 | int i; | |
726f6388 | 2985 | |
bb70624e JA |
2986 | /* see if we can short-circuit. if start == end, we want 0 parameters. */ |
2987 | if (start == end) | |
2988 | return ((char *)NULL); | |
2989 | ||
cce855bc JA |
2990 | save = params = list_rest_of_args (); |
2991 | if (save == 0) | |
2992 | return ((char *)NULL); | |
2993 | ||
d3ad40de CR |
2994 | if (start == 0) /* handle ${@:0[:x]} specially */ |
2995 | { | |
2996 | t = make_word_list (make_word (dollar_vars[0]), params); | |
2997 | save = params = t; | |
2998 | } | |
2999 | ||
0527c903 | 3000 | for (i = start ? 1 : 0; params && i < start; i++) |
cce855bc JA |
3001 | params = params->next; |
3002 | if (params == 0) | |
3003 | return ((char *)NULL); | |
3004 | for (h = t = params; params && i < end; i++) | |
d166f048 | 3005 | { |
cce855bc JA |
3006 | t = params; |
3007 | params = params->next; | |
d166f048 | 3008 | } |
726f6388 | 3009 | |
cce855bc | 3010 | t->next = (WORD_LIST *)NULL; |
e33f2203 CR |
3011 | |
3012 | ret = string_list_pos_params (string[0], h, quoted); | |
3013 | ||
bb70624e JA |
3014 | if (t != params) |
3015 | t->next = params; | |
726f6388 | 3016 | |
cce855bc JA |
3017 | dispose_words (save); |
3018 | return (ret); | |
3019 | } | |
3020 | ||
3021 | /******************************************************************/ | |
3022 | /* */ | |
3023 | /* Functions to expand strings to strings or WORD_LISTs */ | |
3024 | /* */ | |
3025 | /******************************************************************/ | |
3026 | ||
3027 | #if defined (PROCESS_SUBSTITUTION) | |
22e63b05 | 3028 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == '<' || s == '>' || s == CTLESC || s == '~') |
cce855bc | 3029 | #else |
22e63b05 | 3030 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == CTLESC || s == '~') |
cce855bc JA |
3031 | #endif |
3032 | ||
3033 | /* If there are any characters in STRING that require full expansion, | |
3034 | then call FUNC to expand STRING; otherwise just perform quote | |
3035 | removal if necessary. This returns a new string. */ | |
3036 | static char * | |
f73dda09 | 3037 | expand_string_if_necessary (string, quoted, func) |
cce855bc JA |
3038 | char *string; |
3039 | int quoted; | |
f73dda09 | 3040 | EXPFUNC *func; |
cce855bc JA |
3041 | { |
3042 | WORD_LIST *list; | |
7117c2d2 | 3043 | size_t slen; |
cce855bc JA |
3044 | int i, saw_quote; |
3045 | char *ret; | |
7117c2d2 | 3046 | DECLARE_MBSTATE; |
cce855bc | 3047 | |
da713c23 CR |
3048 | /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */ |
3049 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 0; | |
7117c2d2 JA |
3050 | i = saw_quote = 0; |
3051 | while (string[i]) | |
cce855bc JA |
3052 | { |
3053 | if (EXP_CHAR (string[i])) | |
3054 | break; | |
3055 | else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"') | |
3056 | saw_quote = 1; | |
7117c2d2 | 3057 | ADVANCE_CHAR (string, slen, i); |
cce855bc JA |
3058 | } |
3059 | ||
3060 | if (string[i]) | |
3061 | { | |
3062 | list = (*func) (string, quoted); | |
3063 | if (list) | |
3064 | { | |
3065 | ret = string_list (list); | |
3066 | dispose_words (list); | |
3067 | } | |
3068 | else | |
3069 | ret = (char *)NULL; | |
3070 | } | |
3071 | else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
3072 | ret = string_quote_removal (string, quoted); | |
3073 | else | |
3074 | ret = savestring (string); | |
7117c2d2 | 3075 | |
cce855bc JA |
3076 | return ret; |
3077 | } | |
3078 | ||
3079 | static inline char * | |
f73dda09 | 3080 | expand_string_to_string_internal (string, quoted, func) |
cce855bc JA |
3081 | char *string; |
3082 | int quoted; | |
f73dda09 | 3083 | EXPFUNC *func; |
cce855bc JA |
3084 | { |
3085 | WORD_LIST *list; | |
3086 | char *ret; | |
3087 | ||
3088 | if (string == 0 || *string == '\0') | |
3089 | return ((char *)NULL); | |
3090 | ||
3091 | list = (*func) (string, quoted); | |
3092 | if (list) | |
3093 | { | |
3094 | ret = string_list (list); | |
3095 | dispose_words (list); | |
3096 | } | |
3097 | else | |
3098 | ret = (char *)NULL; | |
3099 | ||
3100 | return (ret); | |
3101 | } | |
3102 | ||
f73dda09 JA |
3103 | char * |
3104 | expand_string_to_string (string, quoted) | |
3105 | char *string; | |
3106 | int quoted; | |
3107 | { | |
3108 | return (expand_string_to_string_internal (string, quoted, expand_string)); | |
3109 | } | |
3110 | ||
3111 | char * | |
3112 | expand_string_unsplit_to_string (string, quoted) | |
3113 | char *string; | |
3114 | int quoted; | |
3115 | { | |
3116 | return (expand_string_to_string_internal (string, quoted, expand_string_unsplit)); | |
3117 | } | |
3118 | ||
43df7bbb CR |
3119 | char * |
3120 | expand_assignment_string_to_string (string, quoted) | |
3121 | char *string; | |
3122 | int quoted; | |
3123 | { | |
3124 | return (expand_string_to_string_internal (string, quoted, expand_string_assignment)); | |
3125 | } | |
3126 | ||
dc8fbaf9 | 3127 | char * |
d3ad40de | 3128 | expand_arith_string (string, quoted) |
dc8fbaf9 | 3129 | char *string; |
48ff5447 | 3130 | int quoted; |
dc8fbaf9 | 3131 | { |
d3ad40de | 3132 | return (expand_string_if_necessary (string, quoted, expand_string)); |
dc8fbaf9 CR |
3133 | } |
3134 | ||
cce855bc JA |
3135 | #if defined (COND_COMMAND) |
3136 | /* Just remove backslashes in STRING. Returns a new string. */ | |
3137 | char * | |
3138 | remove_backslashes (string) | |
3139 | char *string; | |
3140 | { | |
3141 | char *r, *ret, *s; | |
3142 | ||
f73dda09 | 3143 | r = ret = (char *)xmalloc (strlen (string) + 1); |
cce855bc JA |
3144 | for (s = string; s && *s; ) |
3145 | { | |
3146 | if (*s == '\\') | |
28ef6c31 | 3147 | s++; |
cce855bc | 3148 | if (*s == 0) |
28ef6c31 | 3149 | break; |
cce855bc JA |
3150 | *r++ = *s++; |
3151 | } | |
3152 | *r = '\0'; | |
3153 | return ret; | |
3154 | } | |
3155 | ||
3156 | /* This needs better error handling. */ | |
3157 | /* Expand W for use as an argument to a unary or binary operator in a | |
d3ad40de | 3158 | [[...]] expression. If SPECIAL is 1, this is the rhs argument |
cce855bc | 3159 | to the != or == operator, and should be treated as a pattern. In |
d3ad40de CR |
3160 | this case, we quote the string specially for the globbing code. If |
3161 | SPECIAL is 2, this is an rhs argument for the =~ operator, and should | |
3162 | be quoted appropriately for regcomp/regexec. The caller is responsible | |
3163 | for removing the backslashes if the unquoted word is needed later. */ | |
cce855bc JA |
3164 | char * |
3165 | cond_expand_word (w, special) | |
3166 | WORD_DESC *w; | |
3167 | int special; | |
3168 | { | |
3169 | char *r, *p; | |
3170 | WORD_LIST *l; | |
d3ad40de | 3171 | int qflags; |
cce855bc JA |
3172 | |
3173 | if (w->word == 0 || w->word[0] == '\0') | |
3174 | return ((char *)NULL); | |
3175 | ||
e1e48bba | 3176 | w->flags |= W_NOSPLIT2; |
b72432fd | 3177 | l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0); |
cce855bc JA |
3178 | if (l) |
3179 | { | |
3180 | if (special == 0) | |
3181 | { | |
3182 | dequote_list (l); | |
3183 | r = string_list (l); | |
3184 | } | |
3185 | else | |
28ef6c31 | 3186 | { |
d3ad40de CR |
3187 | qflags = QGLOB_CVTNULL; |
3188 | if (special == 2) | |
3189 | qflags |= QGLOB_REGEXP; | |
28ef6c31 | 3190 | p = string_list (l); |
d3ad40de | 3191 | r = quote_string_for_globbing (p, qflags); |
28ef6c31 JA |
3192 | free (p); |
3193 | } | |
cce855bc JA |
3194 | dispose_words (l); |
3195 | } | |
3196 | else | |
3197 | r = (char *)NULL; | |
3198 | ||
3199 | return r; | |
3200 | } | |
3201 | #endif | |
3202 | ||
3203 | /* Call expand_word_internal to expand W and handle error returns. | |
3204 | A convenience function for functions that don't want to handle | |
3205 | any errors or free any memory before aborting. */ | |
3206 | static WORD_LIST * | |
b72432fd | 3207 | call_expand_word_internal (w, q, i, c, e) |
cce855bc | 3208 | WORD_DESC *w; |
b72432fd | 3209 | int q, i, *c, *e; |
cce855bc JA |
3210 | { |
3211 | WORD_LIST *result; | |
3212 | ||
b72432fd | 3213 | result = expand_word_internal (w, q, i, c, e); |
bb70624e | 3214 | if (result == &expand_word_error || result == &expand_word_fatal) |
cce855bc JA |
3215 | { |
3216 | /* By convention, each time this error is returned, w->word has | |
bb70624e JA |
3217 | already been freed (it sometimes may not be in the fatal case, |
3218 | but that doesn't result in a memory leak because we're going | |
3219 | to exit in most cases). */ | |
cce855bc | 3220 | w->word = (char *)NULL; |
28ef6c31 | 3221 | last_command_exit_value = EXECUTION_FAILURE; |
d3a24ed2 | 3222 | exp_jump_to_top_level ((result == &expand_word_error) ? DISCARD : FORCE_EOF); |
cce855bc JA |
3223 | /* NOTREACHED */ |
3224 | } | |
cce855bc JA |
3225 | else |
3226 | return (result); | |
3227 | } | |
3228 | ||
3229 | /* Perform parameter expansion, command substitution, and arithmetic | |
9c2db999 CR |
3230 | expansion on STRING, as if it were a word. Leave the result quoted. |
3231 | Since this does not perform word splitting, it leaves quoted nulls | |
3232 | in the result. */ | |
cce855bc JA |
3233 | static WORD_LIST * |
3234 | expand_string_internal (string, quoted) | |
3235 | char *string; | |
3236 | int quoted; | |
3237 | { | |
3238 | WORD_DESC td; | |
3239 | WORD_LIST *tresult; | |
3240 | ||
3241 | if (string == 0 || *string == 0) | |
3242 | return ((WORD_LIST *)NULL); | |
3243 | ||
28ef6c31 JA |
3244 | td.flags = 0; |
3245 | td.word = savestring (string); | |
3246 | ||
b72432fd | 3247 | tresult = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3248 | |
3249 | FREE (td.word); | |
cce855bc | 3250 | return (tresult); |
726f6388 JA |
3251 | } |
3252 | ||
3253 | /* Expand STRING by performing parameter expansion, command substitution, | |
3254 | and arithmetic expansion. Dequote the resulting WORD_LIST before | |
3255 | returning it, but do not perform word splitting. The call to | |
3256 | remove_quoted_nulls () is in here because word splitting normally | |
3257 | takes care of quote removal. */ | |
3258 | WORD_LIST * | |
3259 | expand_string_unsplit (string, quoted) | |
3260 | char *string; | |
3261 | int quoted; | |
3262 | { | |
3263 | WORD_LIST *value; | |
3264 | ||
28ef6c31 | 3265 | if (string == 0 || *string == '\0') |
726f6388 JA |
3266 | return ((WORD_LIST *)NULL); |
3267 | ||
28ef6c31 | 3268 | expand_no_split_dollar_star = 1; |
726f6388 | 3269 | value = expand_string_internal (string, quoted); |
28ef6c31 JA |
3270 | expand_no_split_dollar_star = 0; |
3271 | ||
726f6388 JA |
3272 | if (value) |
3273 | { | |
3274 | if (value->word) | |
227f982e CR |
3275 | { |
3276 | remove_quoted_nulls (value->word->word); | |
3277 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3278 | } | |
726f6388 JA |
3279 | dequote_list (value); |
3280 | } | |
3281 | return (value); | |
3282 | } | |
3283 | ||
22e63b05 CR |
3284 | /* Expand the rhs of an assignment statement */ |
3285 | WORD_LIST * | |
3286 | expand_string_assignment (string, quoted) | |
3287 | char *string; | |
3288 | int quoted; | |
3289 | { | |
3290 | WORD_DESC td; | |
3291 | WORD_LIST *value; | |
3292 | ||
3293 | if (string == 0 || *string == '\0') | |
3294 | return ((WORD_LIST *)NULL); | |
3295 | ||
3296 | expand_no_split_dollar_star = 1; | |
3297 | ||
3298 | td.flags = W_ASSIGNRHS; | |
3299 | td.word = savestring (string); | |
3300 | value = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); | |
3301 | FREE (td.word); | |
3302 | ||
3303 | expand_no_split_dollar_star = 0; | |
3304 | ||
3305 | if (value) | |
3306 | { | |
3307 | if (value->word) | |
227f982e CR |
3308 | { |
3309 | remove_quoted_nulls (value->word->word); | |
3310 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3311 | } | |
22e63b05 CR |
3312 | dequote_list (value); |
3313 | } | |
3314 | return (value); | |
3315 | } | |
3316 | ||
bb70624e JA |
3317 | |
3318 | /* Expand one of the PS? prompt strings. This is a sort of combination of | |
3319 | expand_string_unsplit and expand_string_internal, but returns the | |
3320 | passed string when an error occurs. Might want to trap other calls | |
3321 | to jump_to_top_level here so we don't endlessly loop. */ | |
3322 | WORD_LIST * | |
4d8d005b | 3323 | expand_prompt_string (string, quoted, wflags) |
bb70624e JA |
3324 | char *string; |
3325 | int quoted; | |
4d8d005b | 3326 | int wflags; |
bb70624e JA |
3327 | { |
3328 | WORD_LIST *value; | |
3329 | WORD_DESC td; | |
3330 | ||
3331 | if (string == 0 || *string == 0) | |
3332 | return ((WORD_LIST *)NULL); | |
3333 | ||
4d8d005b | 3334 | td.flags = wflags; |
bb70624e | 3335 | td.word = savestring (string); |
28ef6c31 JA |
3336 | |
3337 | no_longjmp_on_fatal_error = 1; | |
bb70624e | 3338 | value = expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3339 | no_longjmp_on_fatal_error = 0; |
3340 | ||
bb70624e JA |
3341 | if (value == &expand_word_error || value == &expand_word_fatal) |
3342 | { | |
3343 | value = make_word_list (make_bare_word (string), (WORD_LIST *)NULL); | |
3344 | return value; | |
3345 | } | |
3346 | FREE (td.word); | |
3347 | if (value) | |
3348 | { | |
3349 | if (value->word) | |
227f982e CR |
3350 | { |
3351 | remove_quoted_nulls (value->word->word); | |
3352 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3353 | } | |
bb70624e JA |
3354 | dequote_list (value); |
3355 | } | |
3356 | return (value); | |
3357 | } | |
3358 | ||
726f6388 JA |
3359 | /* Expand STRING just as if you were expanding a word, but do not dequote |
3360 | the resultant WORD_LIST. This is called only from within this file, | |
3361 | and is used to correctly preserve quoted characters when expanding | |
3362 | things like ${1+"$@"}. This does parameter expansion, command | |
b72432fd | 3363 | substitution, arithmetic expansion, and word splitting. */ |
726f6388 JA |
3364 | static WORD_LIST * |
3365 | expand_string_leave_quoted (string, quoted) | |
3366 | char *string; | |
3367 | int quoted; | |
3368 | { | |
3369 | WORD_LIST *tlist; | |
3370 | WORD_LIST *tresult; | |
3371 | ||
ccc6cda3 | 3372 | if (string == 0 || *string == '\0') |
726f6388 JA |
3373 | return ((WORD_LIST *)NULL); |
3374 | ||
3375 | tlist = expand_string_internal (string, quoted); | |
3376 | ||
3377 | if (tlist) | |
3378 | { | |
3379 | tresult = word_list_split (tlist); | |
3380 | dispose_words (tlist); | |
3381 | return (tresult); | |
3382 | } | |
3383 | return ((WORD_LIST *)NULL); | |
3384 | } | |
3385 | ||
ccc6cda3 JA |
3386 | /* This does not perform word splitting or dequote the WORD_LIST |
3387 | it returns. */ | |
3388 | static WORD_LIST * | |
3389 | expand_string_for_rhs (string, quoted, dollar_at_p, has_dollar_at) | |
3390 | char *string; | |
3391 | int quoted, *dollar_at_p, *has_dollar_at; | |
3392 | { | |
3393 | WORD_DESC td; | |
3394 | WORD_LIST *tresult; | |
3395 | ||
3396 | if (string == 0 || *string == '\0') | |
3397 | return (WORD_LIST *)NULL; | |
3398 | ||
9c2db999 | 3399 | td.flags = W_NOSPLIT2; /* no splitting, remove "" and '' */ |
ccc6cda3 | 3400 | td.word = string; |
b72432fd | 3401 | tresult = call_expand_word_internal (&td, quoted, 1, dollar_at_p, has_dollar_at); |
ccc6cda3 JA |
3402 | return (tresult); |
3403 | } | |
3404 | ||
726f6388 JA |
3405 | /* Expand STRING just as if you were expanding a word. This also returns |
3406 | a list of words. Note that filename globbing is *NOT* done for word | |
3407 | or string expansion, just when the shell is expanding a command. This | |
3408 | does parameter expansion, command substitution, arithmetic expansion, | |
3409 | and word splitting. Dequote the resultant WORD_LIST before returning. */ | |
3410 | WORD_LIST * | |
3411 | expand_string (string, quoted) | |
3412 | char *string; | |
3413 | int quoted; | |
3414 | { | |
3415 | WORD_LIST *result; | |
3416 | ||
28ef6c31 | 3417 | if (string == 0 || *string == '\0') |
726f6388 JA |
3418 | return ((WORD_LIST *)NULL); |
3419 | ||
3420 | result = expand_string_leave_quoted (string, quoted); | |
ccc6cda3 | 3421 | return (result ? dequote_list (result) : result); |
726f6388 JA |
3422 | } |
3423 | ||
3424 | /*************************************************** | |
3425 | * * | |
3426 | * Functions to handle quoting chars * | |
3427 | * * | |
3428 | ***************************************************/ | |
3429 | ||
cce855bc JA |
3430 | /* Conventions: |
3431 | ||
3432 | A string with s[0] == CTLNUL && s[1] == 0 is a quoted null string. | |
3433 | The parser passes CTLNUL as CTLESC CTLNUL. */ | |
3434 | ||
cce855bc JA |
3435 | /* Quote escape characters in string s, but no other characters. This is |
3436 | used to protect CTLESC and CTLNUL in variable values from the rest of | |
e6598ba4 CR |
3437 | the word expansion process after the variable is expanded (word splitting |
3438 | and filename generation). If IFS is null, we quote spaces as well, just | |
3439 | in case we split on spaces later (in the case of unquoted $@, we will | |
3440 | eventually attempt to split the entire word on spaces). Corresponding | |
3441 | code exists in dequote_escapes. Even if we don't end up splitting on | |
3442 | spaces, quoting spaces is not a problem. This should never be called on | |
3443 | a string that is quoted with single or double quotes or part of a here | |
3444 | document (effectively double-quoted). */ | |
f73dda09 | 3445 | char * |
cce855bc JA |
3446 | quote_escapes (string) |
3447 | char *string; | |
3448 | { | |
3449 | register char *s, *t; | |
7117c2d2 JA |
3450 | size_t slen; |
3451 | char *result, *send; | |
e6598ba4 | 3452 | int quote_spaces, skip_ctlesc, skip_ctlnul; |
7117c2d2 | 3453 | DECLARE_MBSTATE; |
cce855bc | 3454 | |
7117c2d2 JA |
3455 | slen = strlen (string); |
3456 | send = string + slen; | |
3457 | ||
d3ad40de | 3458 | quote_spaces = (ifs_value && *ifs_value == 0); |
e6598ba4 CR |
3459 | |
3460 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) | |
3461 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
3462 | ||
7117c2d2 JA |
3463 | t = result = (char *)xmalloc ((slen * 2) + 1); |
3464 | s = string; | |
3465 | ||
3466 | while (*s) | |
cce855bc | 3467 | { |
e6598ba4 | 3468 | if ((skip_ctlesc == 0 && *s == CTLESC) || (skip_ctlnul == 0 && *s == CTLNUL) || (quote_spaces && *s == ' ')) |
cce855bc | 3469 | *t++ = CTLESC; |
7117c2d2 | 3470 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3471 | } |
3472 | *t = '\0'; | |
3473 | return (result); | |
3474 | } | |
3475 | ||
3476 | static WORD_LIST * | |
3477 | list_quote_escapes (list) | |
3478 | WORD_LIST *list; | |
3479 | { | |
3480 | register WORD_LIST *w; | |
3481 | char *t; | |
3482 | ||
3483 | for (w = list; w; w = w->next) | |
3484 | { | |
3485 | t = w->word->word; | |
3486 | w->word->word = quote_escapes (t); | |
3487 | free (t); | |
3488 | } | |
3489 | return list; | |
3490 | } | |
3491 | ||
7117c2d2 JA |
3492 | /* Inverse of quote_escapes; remove CTLESC protecting CTLESC or CTLNUL. |
3493 | ||
3494 | The parser passes us CTLESC as CTLESC CTLESC and CTLNUL as CTLESC CTLNUL. | |
3495 | This is necessary to make unquoted CTLESC and CTLNUL characters in the | |
3496 | data stream pass through properly. | |
3497 | ||
3498 | We need to remove doubled CTLESC characters inside quoted strings before | |
3499 | quoting the entire string, so we do not double the number of CTLESC | |
3500 | characters. | |
3501 | ||
3502 | Also used by parts of the pattern substitution code. */ | |
09767ff0 | 3503 | char * |
cce855bc JA |
3504 | dequote_escapes (string) |
3505 | char *string; | |
3506 | { | |
e6598ba4 | 3507 | register char *s, *t, *s1; |
7117c2d2 JA |
3508 | size_t slen; |
3509 | char *result, *send; | |
d3ad40de | 3510 | int quote_spaces; |
7117c2d2 | 3511 | DECLARE_MBSTATE; |
cce855bc | 3512 | |
7117c2d2 JA |
3513 | if (string == 0) |
3514 | return string; | |
3515 | ||
3516 | slen = strlen (string); | |
3517 | send = string + slen; | |
3518 | ||
3519 | t = result = (char *)xmalloc (slen + 1); | |
7117c2d2 JA |
3520 | |
3521 | if (strchr (string, CTLESC) == 0) | |
e6598ba4 | 3522 | return (strcpy (result, string)); |
7117c2d2 | 3523 | |
d3ad40de | 3524 | quote_spaces = (ifs_value && *ifs_value == 0); |
e6598ba4 CR |
3525 | |
3526 | s = string; | |
7117c2d2 | 3527 | while (*s) |
cce855bc | 3528 | { |
d3ad40de | 3529 | if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' '))) |
cce855bc JA |
3530 | { |
3531 | s++; | |
3532 | if (*s == '\0') | |
3533 | break; | |
3534 | } | |
7117c2d2 | 3535 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3536 | } |
3537 | *t = '\0'; | |
3538 | return result; | |
3539 | } | |
726f6388 | 3540 | |
d3ad40de CR |
3541 | /* Return a new string with the quoted representation of character C. |
3542 | This turns "" into QUOTED_NULL, so the W_HASQUOTEDNULL flag needs to be | |
3543 | set in any resultant WORD_DESC where this value is the word. */ | |
726f6388 JA |
3544 | static char * |
3545 | make_quoted_char (c) | |
3546 | int c; | |
3547 | { | |
3548 | char *temp; | |
3549 | ||
f73dda09 | 3550 | temp = (char *)xmalloc (3); |
726f6388 JA |
3551 | if (c == 0) |
3552 | { | |
3553 | temp[0] = CTLNUL; | |
3554 | temp[1] = '\0'; | |
3555 | } | |
3556 | else | |
3557 | { | |
3558 | temp[0] = CTLESC; | |
3559 | temp[1] = c; | |
3560 | temp[2] = '\0'; | |
3561 | } | |
3562 | return (temp); | |
3563 | } | |
3564 | ||
d3ad40de CR |
3565 | /* Quote STRING, returning a new string. This turns "" into QUOTED_NULL, so |
3566 | the W_HASQUOTEDNULL flag needs to be set in any resultant WORD_DESC where | |
3567 | this value is the word. */ | |
ccc6cda3 | 3568 | char * |
726f6388 JA |
3569 | quote_string (string) |
3570 | char *string; | |
3571 | { | |
ccc6cda3 | 3572 | register char *t; |
7117c2d2 JA |
3573 | size_t slen; |
3574 | char *result, *send; | |
726f6388 | 3575 | |
ccc6cda3 | 3576 | if (*string == 0) |
726f6388 | 3577 | { |
f73dda09 | 3578 | result = (char *)xmalloc (2); |
726f6388 JA |
3579 | result[0] = CTLNUL; |
3580 | result[1] = '\0'; | |
3581 | } | |
3582 | else | |
3583 | { | |
7117c2d2 | 3584 | DECLARE_MBSTATE; |
726f6388 | 3585 | |
7117c2d2 JA |
3586 | slen = strlen (string); |
3587 | send = string + slen; | |
3588 | ||
3589 | result = (char *)xmalloc ((slen * 2) + 1); | |
3590 | ||
3591 | for (t = result; string < send; ) | |
726f6388 JA |
3592 | { |
3593 | *t++ = CTLESC; | |
7117c2d2 | 3594 | COPY_CHAR_P (t, string, send); |
726f6388 JA |
3595 | } |
3596 | *t = '\0'; | |
3597 | } | |
3598 | return (result); | |
3599 | } | |
3600 | ||
d3ad40de | 3601 | /* De-quote quoted characters in STRING. */ |
726f6388 JA |
3602 | char * |
3603 | dequote_string (string) | |
3604 | char *string; | |
3605 | { | |
7117c2d2 JA |
3606 | register char *s, *t; |
3607 | size_t slen; | |
3608 | char *result, *send; | |
3609 | DECLARE_MBSTATE; | |
726f6388 | 3610 | |
7117c2d2 JA |
3611 | slen = strlen (string); |
3612 | ||
3613 | t = result = (char *)xmalloc (slen + 1); | |
726f6388 JA |
3614 | |
3615 | if (QUOTED_NULL (string)) | |
3616 | { | |
3617 | result[0] = '\0'; | |
3618 | return (result); | |
3619 | } | |
3620 | ||
3621 | /* If no character in the string can be quoted, don't bother examining | |
3622 | each character. Just return a copy of the string passed to us. */ | |
7117c2d2 JA |
3623 | if (strchr (string, CTLESC) == NULL) |
3624 | return (strcpy (result, string)); | |
726f6388 | 3625 | |
7117c2d2 JA |
3626 | send = string + slen; |
3627 | s = string; | |
3628 | while (*s) | |
726f6388 | 3629 | { |
7117c2d2 | 3630 | if (*s == CTLESC) |
726f6388 | 3631 | { |
7117c2d2 JA |
3632 | s++; |
3633 | if (*s == '\0') | |
726f6388 JA |
3634 | break; |
3635 | } | |
7117c2d2 | 3636 | COPY_CHAR_P (t, s, send); |
726f6388 JA |
3637 | } |
3638 | ||
3639 | *t = '\0'; | |
3640 | return (result); | |
3641 | } | |
3642 | ||
3643 | /* Quote the entire WORD_LIST list. */ | |
ccc6cda3 | 3644 | static WORD_LIST * |
726f6388 JA |
3645 | quote_list (list) |
3646 | WORD_LIST *list; | |
3647 | { | |
3648 | register WORD_LIST *w; | |
ccc6cda3 | 3649 | char *t; |
726f6388 JA |
3650 | |
3651 | for (w = list; w; w = w->next) | |
3652 | { | |
ccc6cda3 | 3653 | t = w->word->word; |
726f6388 | 3654 | w->word->word = quote_string (t); |
e33f2203 CR |
3655 | if (*t == 0) |
3656 | w->word->flags |= W_HASQUOTEDNULL; /* XXX - turn on W_HASQUOTEDNULL here? */ | |
ccc6cda3 | 3657 | w->word->flags |= W_QUOTED; |
e33f2203 | 3658 | free (t); |
726f6388 | 3659 | } |
ccc6cda3 | 3660 | return list; |
726f6388 JA |
3661 | } |
3662 | ||
d3ad40de CR |
3663 | /* De-quote quoted characters in each word in LIST. */ |
3664 | WORD_LIST * | |
7117c2d2 JA |
3665 | dequote_list (list) |
3666 | WORD_LIST *list; | |
3667 | { | |
3668 | register char *s; | |
3669 | register WORD_LIST *tlist; | |
3670 | ||
3671 | for (tlist = list; tlist; tlist = tlist->next) | |
3672 | { | |
3673 | s = dequote_string (tlist->word->word); | |
e33f2203 CR |
3674 | if (QUOTED_NULL (tlist->word->word)) |
3675 | tlist->word->flags &= ~W_HASQUOTEDNULL; | |
7117c2d2 JA |
3676 | free (tlist->word->word); |
3677 | tlist->word->word = s; | |
3678 | } | |
3679 | return list; | |
3680 | } | |
3681 | ||
3682 | /* Remove CTLESC protecting a CTLESC or CTLNUL in place. Return the passed | |
3683 | string. */ | |
b0c16657 | 3684 | char * |
7117c2d2 JA |
3685 | remove_quoted_escapes (string) |
3686 | char *string; | |
3687 | { | |
3688 | char *t; | |
3689 | ||
3690 | if (string) | |
3691 | { | |
3692 | t = dequote_escapes (string); | |
3693 | strcpy (string, t); | |
3694 | free (t); | |
3695 | } | |
3696 | ||
3697 | return (string); | |
3698 | } | |
3699 | ||
cce855bc JA |
3700 | /* Perform quoted null character removal on STRING. We don't allow any |
3701 | quoted null characters in the middle or at the ends of strings because | |
3702 | of how expand_word_internal works. remove_quoted_nulls () turns | |
3703 | STRING into an empty string iff it only consists of a quoted null, | |
3704 | and removes all unquoted CTLNUL characters. */ | |
09767ff0 | 3705 | char * |
cce855bc JA |
3706 | remove_quoted_nulls (string) |
3707 | char *string; | |
3708 | { | |
7117c2d2 JA |
3709 | register size_t slen; |
3710 | register int i, j, prev_i; | |
3711 | DECLARE_MBSTATE; | |
3712 | ||
3713 | if (strchr (string, CTLNUL) == 0) /* XXX */ | |
3714 | return string; /* XXX */ | |
3715 | ||
3716 | slen = strlen (string); | |
3717 | i = j = 0; | |
3718 | ||
3719 | while (i < slen) | |
3720 | { | |
3721 | if (string[i] == CTLESC) | |
704a1a2a | 3722 | { |
d3a24ed2 CR |
3723 | /* Old code had j++, but we cannot assume that i == j at this |
3724 | point -- what if a CTLNUL has already been removed from the | |
3725 | string? We don't want to drop the CTLESC or recopy characters | |
3726 | that we've already copied down. */ | |
3727 | i++; string[j++] = CTLESC; | |
704a1a2a CR |
3728 | if (i == slen) |
3729 | break; | |
3730 | } | |
7117c2d2 | 3731 | else if (string[i] == CTLNUL) |
f4f5e1c2 CR |
3732 | { |
3733 | i++; | |
3734 | continue; | |
3735 | } | |
7117c2d2 JA |
3736 | |
3737 | prev_i = i; | |
3738 | ADVANCE_CHAR (string, slen, i); | |
3739 | if (j < prev_i) | |
cce855bc | 3740 | { |
7117c2d2 | 3741 | do string[j++] = string[prev_i++]; while (prev_i < i); |
cce855bc | 3742 | } |
7117c2d2 JA |
3743 | else |
3744 | j = i; | |
cce855bc | 3745 | } |
7117c2d2 JA |
3746 | string[j] = '\0'; |
3747 | ||
3748 | return (string); | |
cce855bc JA |
3749 | } |
3750 | ||
3751 | /* Perform quoted null character removal on each element of LIST. | |
3752 | This modifies LIST. */ | |
3753 | void | |
3754 | word_list_remove_quoted_nulls (list) | |
3755 | WORD_LIST *list; | |
3756 | { | |
3757 | register WORD_LIST *t; | |
3758 | ||
3759 | for (t = list; t; t = t->next) | |
227f982e CR |
3760 | { |
3761 | remove_quoted_nulls (t->word->word); | |
3762 | t->word->flags &= ~W_HASQUOTEDNULL; | |
3763 | } | |
cce855bc JA |
3764 | } |
3765 | ||
3766 | /* **************************************************************** */ | |
3767 | /* */ | |
3768 | /* Functions for Matching and Removing Patterns */ | |
3769 | /* */ | |
3770 | /* **************************************************************** */ | |
3771 | ||
545f34cf | 3772 | #if defined (HANDLE_MULTIBYTE) |
704a1a2a | 3773 | #if 0 /* Currently unused */ |
545f34cf CR |
3774 | static unsigned char * |
3775 | mb_getcharlens (string, len) | |
3776 | char *string; | |
3777 | int len; | |
3778 | { | |
704a1a2a CR |
3779 | int i, offset, last; |
3780 | unsigned char *ret; | |
545f34cf CR |
3781 | char *p; |
3782 | DECLARE_MBSTATE; | |
3783 | ||
3784 | i = offset = 0; | |
3785 | last = 0; | |
3786 | ret = (unsigned char *)xmalloc (len); | |
3787 | memset (ret, 0, len); | |
3788 | while (string[last]) | |
3789 | { | |
3790 | ADVANCE_CHAR (string, len, offset); | |
3791 | ret[last] = offset - last; | |
3792 | last = offset; | |
3793 | } | |
3794 | return ret; | |
3795 | } | |
3796 | #endif | |
704a1a2a | 3797 | #endif |
545f34cf | 3798 | |
cce855bc JA |
3799 | /* Remove the portion of PARAM matched by PATTERN according to OP, where OP |
3800 | can have one of 4 values: | |
3801 | RP_LONG_LEFT remove longest matching portion at start of PARAM | |
726f6388 JA |
3802 | RP_SHORT_LEFT remove shortest matching portion at start of PARAM |
3803 | RP_LONG_RIGHT remove longest matching portion at end of PARAM | |
3804 | RP_SHORT_RIGHT remove shortest matching portion at end of PARAM | |
3805 | */ | |
3806 | ||
3807 | #define RP_LONG_LEFT 1 | |
3808 | #define RP_SHORT_LEFT 2 | |
3809 | #define RP_LONG_RIGHT 3 | |
3810 | #define RP_SHORT_RIGHT 4 | |
3811 | ||
3d35553a | 3812 | /* Returns its first argument if nothing matched; new memory otherwise */ |
726f6388 | 3813 | static char * |
704a1a2a | 3814 | remove_upattern (param, pattern, op) |
726f6388 JA |
3815 | char *param, *pattern; |
3816 | int op; | |
3817 | { | |
ccc6cda3 JA |
3818 | register int len; |
3819 | register char *end; | |
726f6388 | 3820 | register char *p, *ret, c; |
726f6388 | 3821 | |
ccc6cda3 JA |
3822 | len = STRLEN (param); |
3823 | end = param + len; | |
726f6388 JA |
3824 | |
3825 | switch (op) | |
3826 | { | |
3827 | case RP_LONG_LEFT: /* remove longest match at start */ | |
704a1a2a | 3828 | for (p = end; p >= param; p--) |
726f6388 JA |
3829 | { |
3830 | c = *p; *p = '\0'; | |
f73dda09 | 3831 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3832 | { |
3833 | *p = c; | |
3834 | return (savestring (p)); | |
3835 | } | |
3836 | *p = c; | |
545f34cf | 3837 | |
726f6388 JA |
3838 | } |
3839 | break; | |
3840 | ||
3841 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
704a1a2a | 3842 | for (p = param; p <= end; p++) |
726f6388 JA |
3843 | { |
3844 | c = *p; *p = '\0'; | |
f73dda09 | 3845 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3846 | { |
3847 | *p = c; | |
3848 | return (savestring (p)); | |
3849 | } | |
3850 | *p = c; | |
3851 | } | |
3852 | break; | |
3853 | ||
ccc6cda3 | 3854 | case RP_LONG_RIGHT: /* remove longest match at end */ |
704a1a2a | 3855 | for (p = param; p <= end; p++) |
ccc6cda3 | 3856 | { |
f73dda09 | 3857 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3858 | { |
3859 | c = *p; *p = '\0'; | |
3860 | ret = savestring (param); | |
3861 | *p = c; | |
3862 | return (ret); | |
3863 | } | |
3864 | } | |
3865 | break; | |
3866 | ||
3867 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
704a1a2a | 3868 | for (p = end; p >= param; p--) |
ccc6cda3 | 3869 | { |
f73dda09 | 3870 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3871 | { |
3872 | c = *p; *p = '\0'; | |
3873 | ret = savestring (param); | |
3874 | *p = c; | |
3875 | return (ret); | |
3876 | } | |
704a1a2a CR |
3877 | } |
3878 | break; | |
3879 | } | |
3880 | ||
3d35553a | 3881 | return (param); /* no match, return original string */ |
704a1a2a CR |
3882 | } |
3883 | ||
3884 | #if defined (HANDLE_MULTIBYTE) | |
3d35553a | 3885 | /* Returns its first argument if nothing matched; new memory otherwise */ |
704a1a2a CR |
3886 | static wchar_t * |
3887 | remove_wpattern (wparam, wstrlen, wpattern, op) | |
3888 | wchar_t *wparam; | |
3889 | size_t wstrlen; | |
3890 | wchar_t *wpattern; | |
3891 | int op; | |
3892 | { | |
d3ad40de CR |
3893 | wchar_t wc, *ret; |
3894 | int n; | |
545f34cf | 3895 | |
704a1a2a CR |
3896 | switch (op) |
3897 | { | |
3898 | case RP_LONG_LEFT: /* remove longest match at start */ | |
3899 | for (n = wstrlen; n >= 0; n--) | |
3900 | { | |
3901 | wc = wparam[n]; wparam[n] = L'\0'; | |
3902 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
545f34cf | 3903 | { |
704a1a2a CR |
3904 | wparam[n] = wc; |
3905 | return (wcsdup (wparam + n)); | |
3906 | } | |
3907 | wparam[n] = wc; | |
3908 | } | |
3909 | break; | |
3910 | ||
3911 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
3912 | for (n = 0; n <= wstrlen; n++) | |
3913 | { | |
3914 | wc = wparam[n]; wparam[n] = L'\0'; | |
3915 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3916 | { | |
3917 | wparam[n] = wc; | |
3918 | return (wcsdup (wparam + n)); | |
3919 | } | |
3920 | wparam[n] = wc; | |
3921 | } | |
3922 | break; | |
3923 | ||
3924 | case RP_LONG_RIGHT: /* remove longest match at end */ | |
3925 | for (n = 0; n <= wstrlen; n++) | |
3926 | { | |
3927 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3928 | { | |
3929 | wc = wparam[n]; wparam[n] = L'\0'; | |
3930 | ret = wcsdup (wparam); | |
3931 | wparam[n] = wc; | |
3932 | return (ret); | |
3933 | } | |
3934 | } | |
3935 | break; | |
3936 | ||
3937 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
3938 | for (n = wstrlen; n >= 0; n--) | |
3939 | { | |
3940 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3941 | { | |
3942 | wc = wparam[n]; wparam[n] = L'\0'; | |
3943 | ret = wcsdup (wparam); | |
3944 | wparam[n] = wc; | |
3945 | return (ret); | |
545f34cf | 3946 | } |
ccc6cda3 JA |
3947 | } |
3948 | break; | |
3949 | } | |
545f34cf | 3950 | |
3d35553a | 3951 | return (wparam); /* no match, return original string */ |
704a1a2a CR |
3952 | } |
3953 | #endif /* HANDLE_MULTIBYTE */ | |
3954 | ||
3955 | static char * | |
3956 | remove_pattern (param, pattern, op) | |
3957 | char *param, *pattern; | |
3958 | int op; | |
3959 | { | |
3d35553a CR |
3960 | char *xret; |
3961 | ||
704a1a2a CR |
3962 | if (param == NULL) |
3963 | return (param); | |
3964 | if (*param == '\0' || pattern == NULL || *pattern == '\0') /* minor optimization */ | |
3965 | return (savestring (param)); | |
3966 | ||
3967 | #if defined (HANDLE_MULTIBYTE) | |
3968 | if (MB_CUR_MAX > 1) | |
3969 | { | |
3970 | wchar_t *ret, *oret; | |
3971 | size_t n; | |
3972 | wchar_t *wparam, *wpattern; | |
3973 | mbstate_t ps; | |
704a1a2a CR |
3974 | |
3975 | n = xdupmbstowcs (&wpattern, NULL, pattern); | |
3976 | if (n == (size_t)-1) | |
3d35553a CR |
3977 | { |
3978 | xret = remove_upattern (param, pattern, op); | |
3979 | return ((xret == param) ? savestring (param) : xret); | |
3980 | } | |
704a1a2a | 3981 | n = xdupmbstowcs (&wparam, NULL, param); |
73a146be | 3982 | |
704a1a2a CR |
3983 | if (n == (size_t)-1) |
3984 | { | |
3985 | free (wpattern); | |
3d35553a CR |
3986 | xret = remove_upattern (param, pattern, op); |
3987 | return ((xret == param) ? savestring (param) : xret); | |
704a1a2a CR |
3988 | } |
3989 | oret = ret = remove_wpattern (wparam, n, wpattern, op); | |
3d35553a CR |
3990 | /* Don't bother to convert wparam back to multibyte string if nothing |
3991 | matched; just return copy of original string */ | |
3992 | if (ret == wparam) | |
3993 | { | |
3994 | free (wparam); | |
3995 | free (wpattern); | |
3996 | return (savestring (param)); | |
3997 | } | |
704a1a2a CR |
3998 | |
3999 | free (wparam); | |
4000 | free (wpattern); | |
4001 | ||
4002 | n = strlen (param); | |
dc8fbaf9 | 4003 | xret = (char *)xmalloc (n + 1); |
704a1a2a CR |
4004 | memset (&ps, '\0', sizeof (mbstate_t)); |
4005 | n = wcsrtombs (xret, (const wchar_t **)&ret, n, &ps); | |
4006 | xret[n] = '\0'; /* just to make sure */ | |
4007 | free (oret); | |
4008 | return xret; | |
4009 | } | |
4010 | else | |
4011 | #endif | |
3d35553a CR |
4012 | { |
4013 | xret = remove_upattern (param, pattern, op); | |
4014 | return ((xret == param) ? savestring (param) : xret); | |
4015 | } | |
ccc6cda3 JA |
4016 | } |
4017 | ||
ccc6cda3 JA |
4018 | /* Match PAT anywhere in STRING and return the match boundaries. |
4019 | This returns 1 in case of a successful match, 0 otherwise. SP | |
4020 | and EP are pointers into the string where the match begins and | |
4021 | ends, respectively. MTYPE controls what kind of match is attempted. | |
4022 | MATCH_BEG and MATCH_END anchor the match at the beginning and end | |
4023 | of the string, respectively. The longest match is returned. */ | |
4024 | static int | |
704a1a2a | 4025 | match_upattern (string, pat, mtype, sp, ep) |
ccc6cda3 JA |
4026 | char *string, *pat; |
4027 | int mtype; | |
4028 | char **sp, **ep; | |
4029 | { | |
5f8cde23 | 4030 | int c, len, mlen; |
233564d2 | 4031 | register char *p, *p1, *npat; |
ccc6cda3 | 4032 | char *end; |
06dff54a | 4033 | int n1; |
ccc6cda3 | 4034 | |
233564d2 CR |
4035 | /* If the pattern doesn't match anywhere in the string, go ahead and |
4036 | short-circuit right away. A minor optimization, saves a bunch of | |
4037 | unnecessary calls to strmatch (up to N calls for a string of N | |
4038 | characters) if the match is unsuccessful. To preserve the semantics | |
4039 | of the substring matches below, we make sure that the pattern has | |
4040 | `*' as first and last character, making a new pattern if necessary. */ | |
4041 | /* XXX - check this later if I ever implement `**' with special meaning, | |
4042 | since this will potentially result in `**' at the beginning or end */ | |
4043 | len = STRLEN (pat); | |
176b12ee | 4044 | if (pat[0] != '*' || (pat[0] == '*' && pat[1] == LPAREN && extended_glob) || pat[len - 1] != '*') |
233564d2 | 4045 | { |
dc8fbaf9 | 4046 | p = npat = (char *)xmalloc (len + 3); |
233564d2 | 4047 | p1 = pat; |
176b12ee | 4048 | if (*p1 != '*' || (*p1 == '*' && p1[1] == LPAREN && extended_glob)) |
233564d2 CR |
4049 | *p++ = '*'; |
4050 | while (*p1) | |
4051 | *p++ = *p1++; | |
4052 | if (p1[-1] != '*' || p[-2] == '\\') | |
4053 | *p++ = '*'; | |
4054 | *p = '\0'; | |
4055 | } | |
4056 | else | |
4057 | npat = pat; | |
4058 | c = strmatch (npat, string, FNMATCH_EXTFLAG); | |
4059 | if (npat != pat) | |
4060 | free (npat); | |
4061 | if (c == FNM_NOMATCH) | |
4062 | return (0); | |
4063 | ||
5e13499c CR |
4064 | len = STRLEN (string); |
4065 | end = string + len; | |
ccc6cda3 | 4066 | |
5f8cde23 CR |
4067 | mlen = umatchlen (pat, len); |
4068 | ||
ccc6cda3 JA |
4069 | switch (mtype) |
4070 | { | |
4071 | case MATCH_ANY: | |
704a1a2a | 4072 | for (p = string; p <= end; p++) |
ccc6cda3 JA |
4073 | { |
4074 | if (match_pattern_char (pat, p)) | |
4075 | { | |
5f8cde23 | 4076 | p1 = (mlen == -1) ? end : p + mlen; |
06dff54a CR |
4077 | /* p1 - p = length of portion of string to be considered |
4078 | p = current position in string | |
4079 | mlen = number of characters consumed by match (-1 for entire string) | |
4080 | end = end of string | |
4081 | we want to break immediately if the potential match len | |
4082 | is greater than the number of characters remaining in the | |
4083 | string | |
4084 | */ | |
4085 | if (p1 > end) | |
5f8cde23 CR |
4086 | break; |
4087 | for ( ; p1 >= p; p1--) | |
ccc6cda3 JA |
4088 | { |
4089 | c = *p1; *p1 = '\0'; | |
f73dda09 | 4090 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
4091 | { |
4092 | *p1 = c; | |
4093 | *sp = p; | |
4094 | *ep = p1; | |
4095 | return 1; | |
4096 | } | |
4097 | *p1 = c; | |
5f8cde23 CR |
4098 | #if 1 |
4099 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4100 | if (mlen != -1) | |
4101 | break; | |
4102 | #endif | |
ccc6cda3 JA |
4103 | } |
4104 | } | |
4105 | } | |
545f34cf | 4106 | |
ccc6cda3 JA |
4107 | return (0); |
4108 | ||
4109 | case MATCH_BEG: | |
4110 | if (match_pattern_char (pat, string) == 0) | |
28ef6c31 | 4111 | return (0); |
545f34cf | 4112 | |
5f8cde23 | 4113 | for (p = (mlen == -1) ? end : string + mlen; p >= string; p--) |
ccc6cda3 JA |
4114 | { |
4115 | c = *p; *p = '\0'; | |
f73dda09 | 4116 | if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
4117 | { |
4118 | *p = c; | |
4119 | *sp = string; | |
4120 | *ep = p; | |
4121 | return 1; | |
4122 | } | |
4123 | *p = c; | |
5f8cde23 CR |
4124 | /* If MLEN != -1, we have a fixed length pattern. */ |
4125 | if (mlen != -1) | |
4126 | break; | |
ccc6cda3 | 4127 | } |
545f34cf | 4128 | |
ccc6cda3 | 4129 | return (0); |
726f6388 | 4130 | |
ccc6cda3 | 4131 | case MATCH_END: |
5f8cde23 | 4132 | for (p = end - ((mlen == -1) ? len : mlen); p <= end; p++) |
545f34cf CR |
4133 | { |
4134 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) | |
4135 | { | |
4136 | *sp = p; | |
4137 | *ep = end; | |
4138 | return 1; | |
4139 | } | |
5f8cde23 CR |
4140 | /* If MLEN != -1, we have a fixed length pattern. */ |
4141 | if (mlen != -1) | |
4142 | break; | |
704a1a2a CR |
4143 | } |
4144 | ||
4145 | return (0); | |
4146 | } | |
4147 | ||
4148 | return (0); | |
4149 | } | |
4150 | ||
4151 | #if defined (HANDLE_MULTIBYTE) | |
704a1a2a CR |
4152 | /* Match WPAT anywhere in WSTRING and return the match boundaries. |
4153 | This returns 1 in case of a successful match, 0 otherwise. Wide | |
4154 | character version. */ | |
4155 | static int | |
4156 | match_wpattern (wstring, indices, wstrlen, wpat, mtype, sp, ep) | |
4157 | wchar_t *wstring; | |
4158 | char **indices; | |
4159 | size_t wstrlen; | |
4160 | wchar_t *wpat; | |
4161 | int mtype; | |
4162 | char **sp, **ep; | |
4163 | { | |
233564d2 | 4164 | wchar_t wc, *wp, *nwpat, *wp1; |
5f8cde23 CR |
4165 | size_t len; |
4166 | int mlen; | |
adc6cff5 CR |
4167 | int n, n1, n2, simple; |
4168 | ||
4169 | simple = (wpat[0] != L'\\' && wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'['); | |
4170 | #if defined (EXTENDED_GLOB) | |
4171 | if (extended_glob) | |
e107650c | 4172 | simple &= (wpat[1] != L'(' || (wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'+' && wpat[0] != L'!' && wpat[0] != L'@')); /*)*/ |
adc6cff5 | 4173 | #endif |
704a1a2a | 4174 | |
233564d2 CR |
4175 | /* If the pattern doesn't match anywhere in the string, go ahead and |
4176 | short-circuit right away. A minor optimization, saves a bunch of | |
4177 | unnecessary calls to strmatch (up to N calls for a string of N | |
4178 | characters) if the match is unsuccessful. To preserve the semantics | |
4179 | of the substring matches below, we make sure that the pattern has | |
4180 | `*' as first and last character, making a new pattern if necessary. */ | |
233564d2 | 4181 | len = wcslen (wpat); |
176b12ee | 4182 | if (wpat[0] != L'*' || (wpat[0] == L'*' && wpat[1] == WLPAREN && extended_glob) || wpat[len - 1] != L'*') |
233564d2 | 4183 | { |
dc8fbaf9 | 4184 | wp = nwpat = (wchar_t *)xmalloc ((len + 3) * sizeof (wchar_t)); |
233564d2 | 4185 | wp1 = wpat; |
176b12ee | 4186 | if (*wp1 != L'*' || (*wp1 == '*' && wp1[1] == WLPAREN && extended_glob)) |
233564d2 CR |
4187 | *wp++ = L'*'; |
4188 | while (*wp1 != L'\0') | |
4189 | *wp++ = *wp1++; | |
4190 | if (wp1[-1] != L'*' || wp1[-2] == L'\\') | |
4191 | *wp++ = L'*'; | |
4192 | *wp = '\0'; | |
4193 | } | |
4194 | else | |
4195 | nwpat = wpat; | |
4196 | len = wcsmatch (nwpat, wstring, FNMATCH_EXTFLAG); | |
4197 | if (nwpat != wpat) | |
4198 | free (nwpat); | |
4199 | if (len == FNM_NOMATCH) | |
4200 | return (0); | |
4201 | ||
5f8cde23 | 4202 | mlen = wmatchlen (wpat, wstrlen); |
adc6cff5 | 4203 | |
5f8cde23 | 4204 | /* itrace("wmatchlen (%ls) -> %d", wpat, mlen); */ |
704a1a2a CR |
4205 | switch (mtype) |
4206 | { | |
4207 | case MATCH_ANY: | |
4208 | for (n = 0; n <= wstrlen; n++) | |
4209 | { | |
adc6cff5 | 4210 | n2 = simple ? (*wpat == wstring[n]) : match_pattern_wchar (wpat, wstring + n); |
adc6cff5 | 4211 | if (n2) |
704a1a2a | 4212 | { |
5f8cde23 CR |
4213 | n1 = (mlen == -1) ? wstrlen : n + mlen; |
4214 | if (n1 > wstrlen) | |
4215 | break; | |
4216 | ||
4217 | for ( ; n1 >= n; n1--) | |
704a1a2a CR |
4218 | { |
4219 | wc = wstring[n1]; wstring[n1] = L'\0'; | |
4220 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
4221 | { | |
4222 | wstring[n1] = wc; | |
4223 | *sp = indices[n]; | |
4224 | *ep = indices[n1]; | |
4225 | return 1; | |
4226 | } | |
4227 | wstring[n1] = wc; | |
5f8cde23 CR |
4228 | /* If MLEN != -1, we have a fixed length pattern. */ |
4229 | if (mlen != -1) | |
4230 | break; | |
704a1a2a CR |
4231 | } |
4232 | } | |
4233 | } | |
4234 | ||
4235 | return (0); | |
4236 | ||
4237 | case MATCH_BEG: | |
4238 | if (match_pattern_wchar (wpat, wstring) == 0) | |
4239 | return (0); | |
4240 | ||
5f8cde23 | 4241 | for (n = (mlen == -1) ? wstrlen : mlen; n >= 0; n--) |
704a1a2a CR |
4242 | { |
4243 | wc = wstring[n]; wstring[n] = L'\0'; | |
4244 | if (wcsmatch (wpat, wstring, FNMATCH_EXTFLAG) == 0) | |
4245 | { | |
4246 | wstring[n] = wc; | |
4247 | *sp = indices[0]; | |
4248 | *ep = indices[n]; | |
4249 | return 1; | |
4250 | } | |
4251 | wstring[n] = wc; | |
5f8cde23 CR |
4252 | /* If MLEN != -1, we have a fixed length pattern. */ |
4253 | if (mlen != -1) | |
4254 | break; | |
704a1a2a CR |
4255 | } |
4256 | ||
4257 | return (0); | |
4258 | ||
4259 | case MATCH_END: | |
5f8cde23 | 4260 | for (n = wstrlen - ((mlen == -1) ? wstrlen : mlen); n <= wstrlen; n++) |
704a1a2a CR |
4261 | { |
4262 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
545f34cf | 4263 | { |
704a1a2a CR |
4264 | *sp = indices[n]; |
4265 | *ep = indices[wstrlen]; | |
4266 | return 1; | |
545f34cf | 4267 | } |
5f8cde23 CR |
4268 | /* If MLEN != -1, we have a fixed length pattern. */ |
4269 | if (mlen != -1) | |
4270 | break; | |
545f34cf | 4271 | } |
704a1a2a | 4272 | |
ccc6cda3 | 4273 | return (0); |
726f6388 | 4274 | } |
ccc6cda3 JA |
4275 | |
4276 | return (0); | |
726f6388 | 4277 | } |
704a1a2a CR |
4278 | #endif /* HANDLE_MULTIBYTE */ |
4279 | ||
4280 | static int | |
4281 | match_pattern (string, pat, mtype, sp, ep) | |
4282 | char *string, *pat; | |
4283 | int mtype; | |
4284 | char **sp, **ep; | |
4285 | { | |
4286 | #if defined (HANDLE_MULTIBYTE) | |
4287 | int ret; | |
4288 | size_t n; | |
4289 | wchar_t *wstring, *wpat; | |
4290 | char **indices; | |
adc6cff5 | 4291 | size_t slen, plen, mslen, mplen; |
704a1a2a CR |
4292 | #endif |
4293 | ||
4294 | if (string == 0 || *string == 0 || pat == 0 || *pat == 0) | |
4295 | return (0); | |
4296 | ||
4297 | #if defined (HANDLE_MULTIBYTE) | |
4298 | if (MB_CUR_MAX > 1) | |
4299 | { | |
adc6cff5 | 4300 | if (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0) |
adc6cff5 CR |
4301 | return (match_upattern (string, pat, mtype, sp, ep)); |
4302 | ||
704a1a2a CR |
4303 | n = xdupmbstowcs (&wpat, NULL, pat); |
4304 | if (n == (size_t)-1) | |
4305 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4306 | n = xdupmbstowcs (&wstring, &indices, string); | |
4307 | if (n == (size_t)-1) | |
4308 | { | |
4309 | free (wpat); | |
4310 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4311 | } | |
4312 | ret = match_wpattern (wstring, indices, n, wpat, mtype, sp, ep); | |
4313 | ||
4314 | free (wpat); | |
4315 | free (wstring); | |
4316 | free (indices); | |
4317 | ||
4318 | return (ret); | |
4319 | } | |
4320 | else | |
4321 | #endif | |
4322 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4323 | } | |
726f6388 | 4324 | |
cce855bc JA |
4325 | static int |
4326 | getpatspec (c, value) | |
4327 | int c; | |
4328 | char *value; | |
4329 | { | |
4330 | if (c == '#') | |
4331 | return ((*value == '#') ? RP_LONG_LEFT : RP_SHORT_LEFT); | |
4332 | else /* c == '%' */ | |
4333 | return ((*value == '%') ? RP_LONG_RIGHT : RP_SHORT_RIGHT); | |
4334 | } | |
4335 | ||
4336 | /* Posix.2 says that the WORD should be run through tilde expansion, | |
4337 | parameter expansion, command substitution and arithmetic expansion. | |
4338 | This leaves the result quoted, so quote_string_for_globbing () has | |
f73dda09 | 4339 | to be called to fix it up for strmatch (). If QUOTED is non-zero, |
cce855bc JA |
4340 | it means that the entire expression was enclosed in double quotes. |
4341 | This means that quoting characters in the pattern do not make any | |
4342 | special pattern characters quoted. For example, the `*' in the | |
4343 | following retains its special meaning: "${foo#'*'}". */ | |
4344 | static char * | |
4345 | getpattern (value, quoted, expandpat) | |
4346 | char *value; | |
4347 | int quoted, expandpat; | |
4348 | { | |
4349 | char *pat, *tword; | |
4350 | WORD_LIST *l; | |
d3ad40de | 4351 | #if 0 |
cce855bc | 4352 | int i; |
d3ad40de | 4353 | #endif |
7117c2d2 JA |
4354 | /* There is a problem here: how to handle single or double quotes in the |
4355 | pattern string when the whole expression is between double quotes? | |
4356 | POSIX.2 says that enclosing double quotes do not cause the pattern to | |
4357 | be quoted, but does that leave us a problem with @ and array[@] and their | |
4358 | expansions inside a pattern? */ | |
4359 | #if 0 | |
cce855bc JA |
4360 | if (expandpat && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *tword) |
4361 | { | |
4362 | i = 0; | |
4363 | pat = string_extract_double_quoted (tword, &i, 1); | |
4364 | free (tword); | |
4365 | tword = pat; | |
4366 | } | |
7117c2d2 | 4367 | #endif |
cce855bc | 4368 | |
7117c2d2 JA |
4369 | /* expand_string_for_rhs () leaves WORD quoted and does not perform |
4370 | word splitting. */ | |
22e63b05 | 4371 | l = *value ? expand_string_for_rhs (value, |
7117c2d2 | 4372 | (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? Q_PATQUOTE : quoted, |
cce855bc | 4373 | (int *)NULL, (int *)NULL) |
cce855bc | 4374 | : (WORD_LIST *)0; |
cce855bc JA |
4375 | pat = string_list (l); |
4376 | dispose_words (l); | |
4377 | if (pat) | |
4378 | { | |
4379 | tword = quote_string_for_globbing (pat, QGLOB_CVTNULL); | |
4380 | free (pat); | |
4381 | pat = tword; | |
4382 | } | |
4383 | return (pat); | |
4384 | } | |
4385 | ||
7117c2d2 | 4386 | #if 0 |
cce855bc JA |
4387 | /* Handle removing a pattern from a string as a result of ${name%[%]value} |
4388 | or ${name#[#]value}. */ | |
4389 | static char * | |
7117c2d2 JA |
4390 | variable_remove_pattern (value, pattern, patspec, quoted) |
4391 | char *value, *pattern; | |
4392 | int patspec, quoted; | |
cce855bc | 4393 | { |
7117c2d2 | 4394 | char *tword; |
cce855bc | 4395 | |
7117c2d2 | 4396 | tword = remove_pattern (value, pattern, patspec); |
cce855bc | 4397 | |
cce855bc JA |
4398 | return (tword); |
4399 | } | |
7117c2d2 | 4400 | #endif |
cce855bc JA |
4401 | |
4402 | static char * | |
7117c2d2 | 4403 | list_remove_pattern (list, pattern, patspec, itype, quoted) |
cce855bc JA |
4404 | WORD_LIST *list; |
4405 | char *pattern; | |
7117c2d2 | 4406 | int patspec, itype, quoted; |
cce855bc JA |
4407 | { |
4408 | WORD_LIST *new, *l; | |
4409 | WORD_DESC *w; | |
4410 | char *tword; | |
4411 | ||
4412 | for (new = (WORD_LIST *)NULL, l = list; l; l = l->next) | |
4413 | { | |
4414 | tword = remove_pattern (l->word->word, pattern, patspec); | |
227f982e CR |
4415 | w = alloc_word_desc (); |
4416 | w->word = tword ? tword : savestring (""); | |
cce855bc JA |
4417 | new = make_word_list (w, new); |
4418 | } | |
4419 | ||
4420 | l = REVERSE_LIST (new, WORD_LIST *); | |
e33f2203 | 4421 | tword = string_list_pos_params (itype, l, quoted); |
cce855bc | 4422 | dispose_words (l); |
e33f2203 | 4423 | |
cce855bc JA |
4424 | return (tword); |
4425 | } | |
4426 | ||
4427 | static char * | |
7117c2d2 JA |
4428 | parameter_list_remove_pattern (itype, pattern, patspec, quoted) |
4429 | int itype; | |
4430 | char *pattern; | |
4431 | int patspec, quoted; | |
cce855bc | 4432 | { |
7117c2d2 | 4433 | char *ret; |
cce855bc JA |
4434 | WORD_LIST *list; |
4435 | ||
cce855bc | 4436 | list = list_rest_of_args (); |
7117c2d2 JA |
4437 | if (list == 0) |
4438 | return ((char *)NULL); | |
4439 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
cce855bc | 4440 | dispose_words (list); |
cce855bc JA |
4441 | return (ret); |
4442 | } | |
4443 | ||
4444 | #if defined (ARRAY_VARS) | |
4445 | static char * | |
fdf670ea CR |
4446 | array_remove_pattern (var, pattern, patspec, varname, quoted) |
4447 | SHELL_VAR *var; | |
7117c2d2 JA |
4448 | char *pattern; |
4449 | int patspec; | |
4450 | char *varname; /* so we can figure out how it's indexed */ | |
4451 | int quoted; | |
cce855bc | 4452 | { |
fdf670ea CR |
4453 | ARRAY *a; |
4454 | HASH_TABLE *h; | |
7117c2d2 JA |
4455 | int itype; |
4456 | char *ret; | |
4457 | WORD_LIST *list; | |
4458 | SHELL_VAR *v; | |
cce855bc | 4459 | |
7117c2d2 JA |
4460 | /* compute itype from varname here */ |
4461 | v = array_variable_part (varname, &ret, 0); | |
4462 | itype = ret[0]; | |
4463 | ||
fdf670ea CR |
4464 | a = (v && array_p (v)) ? array_cell (v) : 0; |
4465 | h = (v && assoc_p (v)) ? assoc_cell (v) : 0; | |
4466 | ||
4467 | list = a ? array_to_word_list (a) : (h ? assoc_to_word_list (h) : 0); | |
7117c2d2 JA |
4468 | if (list == 0) |
4469 | return ((char *)NULL); | |
4470 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
4471 | dispose_words (list); | |
4472 | ||
4473 | return ret; | |
4474 | } | |
4475 | #endif /* ARRAY_VARS */ | |
4476 | ||
4477 | static char * | |
5f8cde23 CR |
4478 | parameter_brace_remove_pattern (varname, value, ind, patstr, rtype, quoted, flags) |
4479 | char *varname, *value; | |
4480 | int ind; | |
4481 | char *patstr; | |
4482 | int rtype, quoted, flags; | |
7117c2d2 | 4483 | { |
d3a24ed2 | 4484 | int vtype, patspec, starsub; |
7117c2d2 JA |
4485 | char *temp1, *val, *pattern; |
4486 | SHELL_VAR *v; | |
4487 | ||
4488 | if (value == 0) | |
4489 | return ((char *)NULL); | |
4490 | ||
4491 | this_command_name = varname; | |
4492 | ||
5f8cde23 | 4493 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
7117c2d2 | 4494 | if (vtype == -1) |
cce855bc JA |
4495 | return ((char *)NULL); |
4496 | ||
d3a24ed2 CR |
4497 | starsub = vtype & VT_STARSUB; |
4498 | vtype &= ~VT_STARSUB; | |
4499 | ||
7117c2d2 | 4500 | patspec = getpatspec (rtype, patstr); |
cce855bc | 4501 | if (patspec == RP_LONG_LEFT || patspec == RP_LONG_RIGHT) |
7117c2d2 | 4502 | patstr++; |
cce855bc | 4503 | |
c40a57dd CR |
4504 | /* Need to pass getpattern newly-allocated memory in case of expansion -- |
4505 | the expansion code will free the passed string on an error. */ | |
4506 | temp1 = savestring (patstr); | |
4507 | pattern = getpattern (temp1, quoted, 1); | |
4508 | free (temp1); | |
cce855bc | 4509 | |
7117c2d2 JA |
4510 | temp1 = (char *)NULL; /* shut up gcc */ |
4511 | switch (vtype) | |
cce855bc | 4512 | { |
7117c2d2 JA |
4513 | case VT_VARIABLE: |
4514 | case VT_ARRAYMEMBER: | |
4515 | temp1 = remove_pattern (val, pattern, patspec); | |
4516 | if (vtype == VT_VARIABLE) | |
4517 | FREE (val); | |
4518 | if (temp1) | |
28ef6c31 | 4519 | { |
e6598ba4 CR |
4520 | val = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
4521 | ? quote_string (temp1) | |
4522 | : quote_escapes (temp1); | |
7117c2d2 JA |
4523 | free (temp1); |
4524 | temp1 = val; | |
28ef6c31 | 4525 | } |
7117c2d2 JA |
4526 | break; |
4527 | #if defined (ARRAY_VARS) | |
4528 | case VT_ARRAYVAR: | |
fdf670ea | 4529 | temp1 = array_remove_pattern (v, pattern, patspec, varname, quoted); |
7117c2d2 | 4530 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) |
cce855bc | 4531 | { |
7117c2d2 JA |
4532 | val = quote_escapes (temp1); |
4533 | free (temp1); | |
4534 | temp1 = val; | |
cce855bc | 4535 | } |
7117c2d2 JA |
4536 | break; |
4537 | #endif | |
4538 | case VT_POSPARMS: | |
4539 | temp1 = parameter_list_remove_pattern (varname[0], pattern, patspec, quoted); | |
4540 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
4541 | { | |
4542 | val = quote_escapes (temp1); | |
4543 | free (temp1); | |
4544 | temp1 = val; | |
4545 | } | |
4546 | break; | |
cce855bc JA |
4547 | } |
4548 | ||
4549 | FREE (pattern); | |
7117c2d2 JA |
4550 | return temp1; |
4551 | } | |
cce855bc | 4552 | |
726f6388 JA |
4553 | /******************************************* |
4554 | * * | |
4555 | * Functions to expand WORD_DESCs * | |
4556 | * * | |
4557 | *******************************************/ | |
4558 | ||
4559 | /* Expand WORD, performing word splitting on the result. This does | |
4560 | parameter expansion, command substitution, arithmetic expansion, | |
4561 | word splitting, and quote removal. */ | |
4562 | ||
4563 | WORD_LIST * | |
4564 | expand_word (word, quoted) | |
4565 | WORD_DESC *word; | |
4566 | int quoted; | |
4567 | { | |
4568 | WORD_LIST *result, *tresult; | |
4569 | ||
b72432fd | 4570 | tresult = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
726f6388 JA |
4571 | result = word_list_split (tresult); |
4572 | dispose_words (tresult); | |
ccc6cda3 | 4573 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4574 | } |
4575 | ||
4576 | /* Expand WORD, but do not perform word splitting on the result. This | |
4577 | does parameter expansion, command substitution, arithmetic expansion, | |
4578 | and quote removal. */ | |
4579 | WORD_LIST * | |
28ef6c31 | 4580 | expand_word_unsplit (word, quoted) |
726f6388 JA |
4581 | WORD_DESC *word; |
4582 | int quoted; | |
4583 | { | |
4584 | WORD_LIST *result; | |
4585 | ||
28ef6c31 | 4586 | expand_no_split_dollar_star = 1; |
1231ac47 CR |
4587 | #if defined (HANDLE_MULTIBYTE) |
4588 | if (ifs_firstc[0] == 0) | |
4589 | #else | |
4590 | if (ifs_firstc == 0) | |
4591 | #endif | |
4592 | word->flags |= W_NOSPLIT; | |
40647963 | 4593 | word->flags |= W_NOSPLIT2; |
b72432fd | 4594 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 | 4595 | expand_no_split_dollar_star = 0; |
7117c2d2 | 4596 | |
ccc6cda3 | 4597 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4598 | } |
4599 | ||
4600 | /* Perform shell expansions on WORD, but do not perform word splitting or | |
1231ac47 CR |
4601 | quote removal on the result. Virtually identical to expand_word_unsplit; |
4602 | could be combined if implementations don't diverge. */ | |
726f6388 JA |
4603 | WORD_LIST * |
4604 | expand_word_leave_quoted (word, quoted) | |
4605 | WORD_DESC *word; | |
4606 | int quoted; | |
4607 | { | |
1231ac47 CR |
4608 | WORD_LIST *result; |
4609 | ||
4610 | expand_no_split_dollar_star = 1; | |
4611 | #if defined (HANDLE_MULTIBYTE) | |
4612 | if (ifs_firstc[0] == 0) | |
4613 | #else | |
4614 | if (ifs_firstc == 0) | |
4615 | #endif | |
4616 | word->flags |= W_NOSPLIT; | |
e1e48bba | 4617 | word->flags |= W_NOSPLIT2; |
1231ac47 CR |
4618 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
4619 | expand_no_split_dollar_star = 0; | |
4620 | ||
4621 | return result; | |
726f6388 JA |
4622 | } |
4623 | ||
726f6388 JA |
4624 | #if defined (PROCESS_SUBSTITUTION) |
4625 | ||
cce855bc JA |
4626 | /*****************************************************************/ |
4627 | /* */ | |
4628 | /* Hacking Process Substitution */ | |
4629 | /* */ | |
4630 | /*****************************************************************/ | |
726f6388 | 4631 | |
726f6388 JA |
4632 | #if !defined (HAVE_DEV_FD) |
4633 | /* Named pipes must be removed explicitly with `unlink'. This keeps a list | |
4634 | of FIFOs the shell has open. unlink_fifo_list will walk the list and | |
4635 | unlink all of them. add_fifo_list adds the name of an open FIFO to the | |
4636 | list. NFIFO is a count of the number of FIFOs in the list. */ | |
4637 | #define FIFO_INCR 20 | |
4638 | ||
f73dda09 JA |
4639 | struct temp_fifo { |
4640 | char *file; | |
4641 | pid_t proc; | |
4642 | }; | |
4643 | ||
4644 | static struct temp_fifo *fifo_list = (struct temp_fifo *)NULL; | |
ccc6cda3 JA |
4645 | static int nfifo; |
4646 | static int fifo_list_size; | |
726f6388 | 4647 | |
112ff2a6 CR |
4648 | char * |
4649 | copy_fifo_list (sizep) | |
4650 | int *sizep; | |
4651 | { | |
4652 | if (sizep) | |
4653 | *sizep = 0; | |
4654 | return (char *)NULL; | |
4655 | } | |
4656 | ||
726f6388 JA |
4657 | static void |
4658 | add_fifo_list (pathname) | |
4659 | char *pathname; | |
4660 | { | |
4661 | if (nfifo >= fifo_list_size - 1) | |
4662 | { | |
4663 | fifo_list_size += FIFO_INCR; | |
f73dda09 JA |
4664 | fifo_list = (struct temp_fifo *)xrealloc (fifo_list, |
4665 | fifo_list_size * sizeof (struct temp_fifo)); | |
726f6388 JA |
4666 | } |
4667 | ||
f73dda09 JA |
4668 | fifo_list[nfifo].file = savestring (pathname); |
4669 | nfifo++; | |
726f6388 JA |
4670 | } |
4671 | ||
112ff2a6 CR |
4672 | void |
4673 | unlink_fifo (i) | |
4674 | int i; | |
4675 | { | |
4676 | if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1)) | |
4677 | { | |
4678 | unlink (fifo_list[i].file); | |
4679 | free (fifo_list[i].file); | |
4680 | fifo_list[i].file = (char *)NULL; | |
4681 | fifo_list[i].proc = -1; | |
4682 | } | |
4683 | } | |
4684 | ||
726f6388 JA |
4685 | void |
4686 | unlink_fifo_list () | |
4687 | { | |
f73dda09 JA |
4688 | int saved, i, j; |
4689 | ||
ccc6cda3 | 4690 | if (nfifo == 0) |
726f6388 JA |
4691 | return; |
4692 | ||
f73dda09 | 4693 | for (i = saved = 0; i < nfifo; i++) |
726f6388 | 4694 | { |
f73dda09 JA |
4695 | if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1)) |
4696 | { | |
7117c2d2 JA |
4697 | unlink (fifo_list[i].file); |
4698 | free (fifo_list[i].file); | |
4699 | fifo_list[i].file = (char *)NULL; | |
4700 | fifo_list[i].proc = -1; | |
f73dda09 JA |
4701 | } |
4702 | else | |
7117c2d2 | 4703 | saved++; |
f73dda09 JA |
4704 | } |
4705 | ||
4706 | /* If we didn't remove some of the FIFOs, compact the list. */ | |
4707 | if (saved) | |
4708 | { | |
4709 | for (i = j = 0; i < nfifo; i++) | |
4710 | if (fifo_list[i].file) | |
4711 | { | |
4712 | fifo_list[j].file = fifo_list[i].file; | |
4713 | fifo_list[j].proc = fifo_list[i].proc; | |
4714 | j++; | |
4715 | } | |
4716 | nfifo = j; | |
726f6388 | 4717 | } |
f73dda09 JA |
4718 | else |
4719 | nfifo = 0; | |
726f6388 JA |
4720 | } |
4721 | ||
112ff2a6 CR |
4722 | /* Take LIST, which is a bitmap denoting active FIFOs in fifo_list |
4723 | from some point in the past, and close all open FIFOs in fifo_list | |
4724 | that are not marked as active in LIST. If LIST is NULL, close | |
4725 | everything in fifo_list. LSIZE is the number of elements in LIST, in | |
4726 | case it's larger than fifo_list_size (size of fifo_list). */ | |
4727 | void | |
4728 | close_new_fifos (list, lsize) | |
4729 | char *list; | |
4730 | int lsize; | |
4731 | { | |
4732 | int i; | |
4733 | ||
4734 | if (list == 0) | |
4735 | { | |
112ff2a6 CR |
4736 | unlink_fifo_list (); |
4737 | return; | |
4738 | } | |
4739 | ||
4740 | for (i = 0; i < lsize; i++) | |
4741 | if (list[i] == 0 && i < fifo_list_size && fifo_list[i].proc != -1) | |
112ff2a6 | 4742 | unlink_fifo (i); |
112ff2a6 CR |
4743 | |
4744 | for (i = lsize; i < fifo_list_size; i++) | |
112ff2a6 CR |
4745 | unlink_fifo (i); |
4746 | } | |
112ff2a6 | 4747 | |
d3ad40de CR |
4748 | int |
4749 | fifos_pending () | |
4750 | { | |
4751 | return nfifo; | |
4752 | } | |
4753 | ||
112ff2a6 CR |
4754 | int |
4755 | num_fifos () | |
4756 | { | |
4757 | return nfifo; | |
4758 | } | |
4759 | ||
726f6388 JA |
4760 | static char * |
4761 | make_named_pipe () | |
4762 | { | |
4763 | char *tname; | |
4764 | ||
d3ad40de | 4765 | tname = sh_mktmpname ("sh-np", MT_USERANDOM|MT_USETMPDIR); |
726f6388 JA |
4766 | if (mkfifo (tname, 0600) < 0) |
4767 | { | |
4768 | free (tname); | |
4769 | return ((char *)NULL); | |
4770 | } | |
4771 | ||
4772 | add_fifo_list (tname); | |
4773 | return (tname); | |
4774 | } | |
4775 | ||
726f6388 JA |
4776 | #else /* HAVE_DEV_FD */ |
4777 | ||
4778 | /* DEV_FD_LIST is a bitmap of file descriptors attached to pipes the shell | |
4779 | has open to children. NFDS is a count of the number of bits currently | |
4780 | set in DEV_FD_LIST. TOTFDS is a count of the highest possible number | |
4781 | of open files. */ | |
4782 | static char *dev_fd_list = (char *)NULL; | |
ccc6cda3 | 4783 | static int nfds; |
726f6388 JA |
4784 | static int totfds; /* The highest possible number of open files. */ |
4785 | ||
112ff2a6 CR |
4786 | char * |
4787 | copy_fifo_list (sizep) | |
4788 | int *sizep; | |
4789 | { | |
4790 | char *ret; | |
4791 | ||
4792 | if (nfds == 0 || totfds == 0) | |
4793 | { | |
4794 | if (sizep) | |
4795 | *sizep = 0; | |
4796 | return (char *)NULL; | |
4797 | } | |
4798 | ||
4799 | if (sizep) | |
4800 | *sizep = totfds; | |
4801 | ret = (char *)xmalloc (totfds); | |
4802 | return (memcpy (ret, dev_fd_list, totfds)); | |
4803 | } | |
4804 | ||
726f6388 JA |
4805 | static void |
4806 | add_fifo_list (fd) | |
4807 | int fd; | |
4808 | { | |
112ff2a6 | 4809 | if (dev_fd_list == 0 || fd >= totfds) |
726f6388 JA |
4810 | { |
4811 | int ofds; | |
4812 | ||
4813 | ofds = totfds; | |
4814 | totfds = getdtablesize (); | |
4815 | if (totfds < 0 || totfds > 256) | |
4816 | totfds = 256; | |
626d0694 | 4817 | if (fd >= totfds) |
726f6388 JA |
4818 | totfds = fd + 2; |
4819 | ||
f73dda09 | 4820 | dev_fd_list = (char *)xrealloc (dev_fd_list, totfds); |
7117c2d2 | 4821 | memset (dev_fd_list + ofds, '\0', totfds - ofds); |
726f6388 JA |
4822 | } |
4823 | ||
4824 | dev_fd_list[fd] = 1; | |
4825 | nfds++; | |
4826 | } | |
4827 | ||
d3ad40de CR |
4828 | int |
4829 | fifos_pending () | |
4830 | { | |
4831 | return 0; /* used for cleanup; not needed with /dev/fd */ | |
4832 | } | |
4833 | ||
112ff2a6 CR |
4834 | int |
4835 | num_fifos () | |
4836 | { | |
4837 | return nfds; | |
4838 | } | |
4839 | ||
4840 | void | |
4841 | unlink_fifo (fd) | |
4842 | int fd; | |
4843 | { | |
4844 | if (dev_fd_list[fd]) | |
4845 | { | |
4846 | close (fd); | |
4847 | dev_fd_list[fd] = 0; | |
4848 | nfds--; | |
4849 | } | |
4850 | } | |
4851 | ||
726f6388 JA |
4852 | void |
4853 | unlink_fifo_list () | |
4854 | { | |
4855 | register int i; | |
4856 | ||
ccc6cda3 | 4857 | if (nfds == 0) |
726f6388 JA |
4858 | return; |
4859 | ||
4860 | for (i = 0; nfds && i < totfds; i++) | |
112ff2a6 | 4861 | unlink_fifo (i); |
726f6388 JA |
4862 | |
4863 | nfds = 0; | |
4864 | } | |
4865 | ||
112ff2a6 CR |
4866 | /* Take LIST, which is a snapshot copy of dev_fd_list from some point in |
4867 | the past, and close all open fds in dev_fd_list that are not marked | |
4868 | as open in LIST. If LIST is NULL, close everything in dev_fd_list. | |
4869 | LSIZE is the number of elements in LIST, in case it's larger than | |
4870 | totfds (size of dev_fd_list). */ | |
4871 | void | |
4872 | close_new_fifos (list, lsize) | |
4873 | char *list; | |
4874 | int lsize; | |
4875 | { | |
4876 | int i; | |
4877 | ||
4878 | if (list == 0) | |
4879 | { | |
4880 | unlink_fifo_list (); | |
4881 | return; | |
4882 | } | |
4883 | ||
4884 | for (i = 0; i < lsize; i++) | |
4885 | if (list[i] == 0 && i < totfds && dev_fd_list[i]) | |
4886 | unlink_fifo (i); | |
4887 | ||
4888 | for (i = lsize; i < totfds; i++) | |
4889 | unlink_fifo (i); | |
4890 | } | |
4891 | ||
726f6388 JA |
4892 | #if defined (NOTDEF) |
4893 | print_dev_fd_list () | |
4894 | { | |
4895 | register int i; | |
4896 | ||
f73dda09 | 4897 | fprintf (stderr, "pid %ld: dev_fd_list:", (long)getpid ()); |
726f6388 JA |
4898 | fflush (stderr); |
4899 | ||
4900 | for (i = 0; i < totfds; i++) | |
4901 | { | |
4902 | if (dev_fd_list[i]) | |
4903 | fprintf (stderr, " %d", i); | |
4904 | } | |
4905 | fprintf (stderr, "\n"); | |
4906 | } | |
4907 | #endif /* NOTDEF */ | |
4908 | ||
4909 | static char * | |
4910 | make_dev_fd_filename (fd) | |
4911 | int fd; | |
4912 | { | |
f73dda09 | 4913 | char *ret, intbuf[INT_STRLEN_BOUND (int) + 1], *p; |
726f6388 | 4914 | |
e141c35a | 4915 | ret = (char *)xmalloc (sizeof (DEV_FD_PREFIX) + 8); |
bb70624e JA |
4916 | |
4917 | strcpy (ret, DEV_FD_PREFIX); | |
4918 | p = inttostr (fd, intbuf, sizeof (intbuf)); | |
4919 | strcpy (ret + sizeof (DEV_FD_PREFIX) - 1, p); | |
4920 | ||
726f6388 JA |
4921 | add_fifo_list (fd); |
4922 | return (ret); | |
4923 | } | |
4924 | ||
4925 | #endif /* HAVE_DEV_FD */ | |
4926 | ||
4927 | /* Return a filename that will open a connection to the process defined by | |
4928 | executing STRING. HAVE_DEV_FD, if defined, means open a pipe and return | |
4929 | a filename in /dev/fd corresponding to a descriptor that is one of the | |
4930 | ends of the pipe. If not defined, we use named pipes on systems that have | |
4931 | them. Systems without /dev/fd and named pipes are out of luck. | |
4932 | ||
4933 | OPEN_FOR_READ_IN_CHILD, if 1, means open the named pipe for reading or | |
4934 | use the read end of the pipe and dup that file descriptor to fd 0 in | |
4935 | the child. If OPEN_FOR_READ_IN_CHILD is 0, we open the named pipe for | |
4936 | writing or use the write end of the pipe in the child, and dup that | |
4937 | file descriptor to fd 1 in the child. The parent does the opposite. */ | |
4938 | ||
4939 | static char * | |
4940 | process_substitute (string, open_for_read_in_child) | |
4941 | char *string; | |
4942 | int open_for_read_in_child; | |
4943 | { | |
4944 | char *pathname; | |
4945 | int fd, result; | |
4946 | pid_t old_pid, pid; | |
4947 | #if defined (HAVE_DEV_FD) | |
4948 | int parent_pipe_fd, child_pipe_fd; | |
4949 | int fildes[2]; | |
4950 | #endif /* HAVE_DEV_FD */ | |
4951 | #if defined (JOB_CONTROL) | |
4952 | pid_t old_pipeline_pgrp; | |
ccc6cda3 | 4953 | #endif |
726f6388 | 4954 | |
cce855bc | 4955 | if (!string || !*string || wordexp_only) |
726f6388 JA |
4956 | return ((char *)NULL); |
4957 | ||
4958 | #if !defined (HAVE_DEV_FD) | |
4959 | pathname = make_named_pipe (); | |
4960 | #else /* HAVE_DEV_FD */ | |
4961 | if (pipe (fildes) < 0) | |
4962 | { | |
5e13499c | 4963 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
4964 | return ((char *)NULL); |
4965 | } | |
4966 | /* If OPEN_FOR_READ_IN_CHILD == 1, we want to use the write end of | |
4967 | the pipe in the parent, otherwise the read end. */ | |
4968 | parent_pipe_fd = fildes[open_for_read_in_child]; | |
4969 | child_pipe_fd = fildes[1 - open_for_read_in_child]; | |
d166f048 JA |
4970 | /* Move the parent end of the pipe to some high file descriptor, to |
4971 | avoid clashes with FDs used by the script. */ | |
4972 | parent_pipe_fd = move_to_high_fd (parent_pipe_fd, 1, 64); | |
4973 | ||
726f6388 JA |
4974 | pathname = make_dev_fd_filename (parent_pipe_fd); |
4975 | #endif /* HAVE_DEV_FD */ | |
4976 | ||
36211029 | 4977 | if (pathname == 0) |
726f6388 | 4978 | { |
5e13499c | 4979 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
4980 | return ((char *)NULL); |
4981 | } | |
4982 | ||
4983 | old_pid = last_made_pid; | |
4984 | ||
4985 | #if defined (JOB_CONTROL) | |
4986 | old_pipeline_pgrp = pipeline_pgrp; | |
4987 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 4988 | save_pipeline (1); |
ccc6cda3 JA |
4989 | #endif /* JOB_CONTROL */ |
4990 | ||
726f6388 JA |
4991 | pid = make_child ((char *)NULL, 1); |
4992 | if (pid == 0) | |
4993 | { | |
ccc6cda3 | 4994 | reset_terminating_signals (); /* XXX */ |
d3a24ed2 | 4995 | free_pushed_string_input (); |
726f6388 | 4996 | /* Cancel traps, in trap.c. */ |
d1fab3dc | 4997 | restore_original_signals (); /* XXX - what about special builtins? bash-4.2 */ |
726f6388 | 4998 | setup_async_signals (); |
d3ad40de | 4999 | subshell_environment |= SUBSHELL_COMSUB|SUBSHELL_PROCSUB; |
726f6388 | 5000 | } |
ccc6cda3 JA |
5001 | |
5002 | #if defined (JOB_CONTROL) | |
726f6388 JA |
5003 | set_sigchld_handler (); |
5004 | stop_making_children (); | |
866961ad | 5005 | /* XXX - should we only do this in the parent? (as in command subst) */ |
726f6388 | 5006 | pipeline_pgrp = old_pipeline_pgrp; |
ccc6cda3 | 5007 | #endif /* JOB_CONTROL */ |
726f6388 JA |
5008 | |
5009 | if (pid < 0) | |
5010 | { | |
5e13499c | 5011 | sys_error (_("cannot make child for process substitution")); |
726f6388 JA |
5012 | free (pathname); |
5013 | #if defined (HAVE_DEV_FD) | |
5014 | close (parent_pipe_fd); | |
5015 | close (child_pipe_fd); | |
5016 | #endif /* HAVE_DEV_FD */ | |
5017 | return ((char *)NULL); | |
5018 | } | |
5019 | ||
5020 | if (pid > 0) | |
5021 | { | |
ccc6cda3 JA |
5022 | #if defined (JOB_CONTROL) |
5023 | restore_pipeline (1); | |
5024 | #endif | |
5025 | ||
f73dda09 JA |
5026 | #if !defined (HAVE_DEV_FD) |
5027 | fifo_list[nfifo-1].proc = pid; | |
5028 | #endif | |
5029 | ||
726f6388 JA |
5030 | last_made_pid = old_pid; |
5031 | ||
5032 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) | |
5033 | close_pgrp_pipe (); | |
5034 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
5035 | ||
5036 | #if defined (HAVE_DEV_FD) | |
5037 | close (child_pipe_fd); | |
5038 | #endif /* HAVE_DEV_FD */ | |
5039 | ||
5040 | return (pathname); | |
5041 | } | |
5042 | ||
5043 | set_sigint_handler (); | |
5044 | ||
5045 | #if defined (JOB_CONTROL) | |
5046 | set_job_control (0); | |
5047 | #endif /* JOB_CONTROL */ | |
5048 | ||
5049 | #if !defined (HAVE_DEV_FD) | |
5050 | /* Open the named pipe in the child. */ | |
ccc6cda3 | 5051 | fd = open (pathname, open_for_read_in_child ? O_RDONLY|O_NONBLOCK : O_WRONLY); |
726f6388 JA |
5052 | if (fd < 0) |
5053 | { | |
5e13499c CR |
5054 | /* Two separate strings for ease of translation. */ |
5055 | if (open_for_read_in_child) | |
5056 | sys_error (_("cannot open named pipe %s for reading"), pathname); | |
5057 | else | |
5058 | sys_error (_("cannot open named pipe %s for writing"), pathname); | |
5059 | ||
726f6388 JA |
5060 | exit (127); |
5061 | } | |
bb70624e JA |
5062 | if (open_for_read_in_child) |
5063 | { | |
28ef6c31 | 5064 | if (sh_unset_nodelay_mode (fd) < 0) |
bb70624e | 5065 | { |
d3ad40de | 5066 | sys_error (_("cannot reset nodelay mode for fd %d"), fd); |
bb70624e JA |
5067 | exit (127); |
5068 | } | |
5069 | } | |
726f6388 JA |
5070 | #else /* HAVE_DEV_FD */ |
5071 | fd = child_pipe_fd; | |
5072 | #endif /* HAVE_DEV_FD */ | |
5073 | ||
5074 | if (dup2 (fd, open_for_read_in_child ? 0 : 1) < 0) | |
5075 | { | |
5e13499c | 5076 | sys_error (_("cannot duplicate named pipe %s as fd %d"), pathname, |
ccc6cda3 | 5077 | open_for_read_in_child ? 0 : 1); |
726f6388 JA |
5078 | exit (127); |
5079 | } | |
5080 | ||
f73dda09 JA |
5081 | if (fd != (open_for_read_in_child ? 0 : 1)) |
5082 | close (fd); | |
726f6388 JA |
5083 | |
5084 | /* Need to close any files that this process has open to pipes inherited | |
5085 | from its parent. */ | |
5086 | if (current_fds_to_close) | |
5087 | { | |
5088 | close_fd_bitmap (current_fds_to_close); | |
5089 | current_fds_to_close = (struct fd_bitmap *)NULL; | |
5090 | } | |
5091 | ||
5092 | #if defined (HAVE_DEV_FD) | |
5093 | /* Make sure we close the parent's end of the pipe and clear the slot | |
5094 | in the fd list so it is not closed later, if reallocated by, for | |
5095 | instance, pipe(2). */ | |
5096 | close (parent_pipe_fd); | |
5097 | dev_fd_list[parent_pipe_fd] = 0; | |
5098 | #endif /* HAVE_DEV_FD */ | |
5099 | ||
3087e51c CR |
5100 | /* subshells shouldn't have this flag, which controls using the temporary |
5101 | environment for variable lookups. */ | |
5102 | expanding_redir = 0; | |
5103 | ||
d166f048 | 5104 | result = parse_and_execute (string, "process substitution", (SEVAL_NONINT|SEVAL_NOHIST)); |
726f6388 JA |
5105 | |
5106 | #if !defined (HAVE_DEV_FD) | |
5107 | /* Make sure we close the named pipe in the child before we exit. */ | |
5108 | close (open_for_read_in_child ? 0 : 1); | |
5109 | #endif /* !HAVE_DEV_FD */ | |
5110 | ||
5111 | exit (result); | |
5112 | /*NOTREACHED*/ | |
5113 | } | |
5114 | #endif /* PROCESS_SUBSTITUTION */ | |
5115 | ||
cce855bc JA |
5116 | /***********************************/ |
5117 | /* */ | |
5118 | /* Command Substitution */ | |
5119 | /* */ | |
5120 | /***********************************/ | |
5121 | ||
d166f048 | 5122 | static char * |
d3ad40de | 5123 | read_comsub (fd, quoted, rflag) |
d166f048 | 5124 | int fd, quoted; |
d3ad40de | 5125 | int *rflag; |
d166f048 | 5126 | { |
e6598ba4 CR |
5127 | char *istring, buf[128], *bufp, *s; |
5128 | int istring_index, istring_size, c, tflag, skip_ctlesc, skip_ctlnul; | |
f73dda09 | 5129 | ssize_t bufn; |
d166f048 JA |
5130 | |
5131 | istring = (char *)NULL; | |
d3ad40de | 5132 | istring_index = istring_size = bufn = tflag = 0; |
d166f048 | 5133 | |
e6598ba4 CR |
5134 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) |
5135 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
5136 | ||
d3ad40de CR |
5137 | /* Read the output of the command through the pipe. This may need to be |
5138 | changed to understand multibyte characters in the future. */ | |
d166f048 JA |
5139 | while (1) |
5140 | { | |
5141 | if (fd < 0) | |
28ef6c31 | 5142 | break; |
d166f048 JA |
5143 | if (--bufn <= 0) |
5144 | { | |
bb70624e | 5145 | bufn = zread (fd, buf, sizeof (buf)); |
d166f048 JA |
5146 | if (bufn <= 0) |
5147 | break; | |
5148 | bufp = buf; | |
5149 | } | |
5150 | c = *bufp++; | |
5151 | ||
28ef6c31 JA |
5152 | if (c == 0) |
5153 | { | |
5154 | #if 0 | |
5155 | internal_warning ("read_comsub: ignored null byte in input"); | |
5156 | #endif | |
5157 | continue; | |
5158 | } | |
5159 | ||
d166f048 JA |
5160 | /* Add the character to ISTRING, possibly after resizing it. */ |
5161 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE); | |
5162 | ||
d3ad40de CR |
5163 | /* This is essentially quote_string inline */ |
5164 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */) | |
5165 | istring[istring_index++] = CTLESC; | |
5166 | /* Escape CTLESC and CTLNUL in the output to protect those characters | |
5167 | from the rest of the word expansions (word splitting and globbing.) | |
5168 | This is essentially quote_escapes inline. */ | |
e6598ba4 | 5169 | else if (skip_ctlesc == 0 && c == CTLESC) |
d3ad40de CR |
5170 | { |
5171 | tflag |= W_HASCTLESC; | |
5172 | istring[istring_index++] = CTLESC; | |
5173 | } | |
e6598ba4 | 5174 | else if ((skip_ctlnul == 0 && c == CTLNUL) || (c == ' ' && (ifs_value && *ifs_value == 0))) |
d166f048 JA |
5175 | istring[istring_index++] = CTLESC; |
5176 | ||
5177 | istring[istring_index++] = c; | |
28ef6c31 JA |
5178 | |
5179 | #if 0 | |
5180 | #if defined (__CYGWIN__) | |
5181 | if (c == '\n' && istring_index > 1 && istring[istring_index - 2] == '\r') | |
5182 | { | |
5183 | istring_index--; | |
5184 | istring[istring_index - 1] = '\n'; | |
5185 | } | |
5186 | #endif | |
5187 | #endif | |
d166f048 JA |
5188 | } |
5189 | ||
5190 | if (istring) | |
5191 | istring[istring_index] = '\0'; | |
5192 | ||
5193 | /* If we read no output, just return now and save ourselves some | |
5194 | trouble. */ | |
5195 | if (istring_index == 0) | |
5196 | { | |
5197 | FREE (istring); | |
d3ad40de CR |
5198 | if (rflag) |
5199 | *rflag = tflag; | |
d166f048 JA |
5200 | return (char *)NULL; |
5201 | } | |
5202 | ||
5203 | /* Strip trailing newlines from the output of the command. */ | |
5204 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
5205 | { | |
5206 | while (istring_index > 0) | |
5207 | { | |
5208 | if (istring[istring_index - 1] == '\n') | |
5209 | { | |
5210 | --istring_index; | |
5211 | ||
5212 | /* If the newline was quoted, remove the quoting char. */ | |
5213 | if (istring[istring_index - 1] == CTLESC) | |
5214 | --istring_index; | |
5215 | } | |
5216 | else | |
5217 | break; | |
5218 | } | |
5219 | istring[istring_index] = '\0'; | |
5220 | } | |
5221 | else | |
5222 | strip_trailing (istring, istring_index - 1, 1); | |
5223 | ||
d3ad40de CR |
5224 | if (rflag) |
5225 | *rflag = tflag; | |
d166f048 JA |
5226 | return istring; |
5227 | } | |
5228 | ||
d3ad40de CR |
5229 | /* Perform command substitution on STRING. This returns a WORD_DESC * with the |
5230 | contained string possibly quoted. */ | |
5231 | WORD_DESC * | |
726f6388 JA |
5232 | command_substitute (string, quoted) |
5233 | char *string; | |
5234 | int quoted; | |
5235 | { | |
cac4cdbf | 5236 | pid_t pid, old_pid, old_pipeline_pgrp, old_async_pid; |
ccc6cda3 | 5237 | char *istring; |
d3ad40de CR |
5238 | int result, fildes[2], function_value, pflags, rc, tflag; |
5239 | WORD_DESC *ret; | |
726f6388 | 5240 | |
ccc6cda3 | 5241 | istring = (char *)NULL; |
726f6388 JA |
5242 | |
5243 | /* Don't fork () if there is no need to. In the case of no command to | |
5244 | run, just return NULL. */ | |
5245 | if (!string || !*string || (string[0] == '\n' && !string[1])) | |
d3ad40de | 5246 | return ((WORD_DESC *)NULL); |
726f6388 | 5247 | |
cce855bc JA |
5248 | if (wordexp_only && read_but_dont_execute) |
5249 | { | |
3eb2d94a | 5250 | last_command_exit_value = EX_WEXPCOMSUB; |
cce855bc JA |
5251 | jump_to_top_level (EXITPROG); |
5252 | } | |
5253 | ||
bb70624e JA |
5254 | /* We're making the assumption here that the command substitution will |
5255 | eventually run a command from the file system. Since we'll run | |
5256 | maybe_make_export_env in this subshell before executing that command, | |
5257 | the parent shell and any other shells it starts will have to remake | |
5258 | the environment. If we make it before we fork, other shells won't | |
5259 | have to. Don't bother if we have any temporary variable assignments, | |
5260 | though, because the export environment will be remade after this | |
5261 | command completes anyway, but do it if all the words to be expanded | |
5262 | are variable assignments. */ | |
5263 | if (subst_assign_varlist == 0 || garglist == 0) | |
5264 | maybe_make_export_env (); /* XXX */ | |
5265 | ||
d3a24ed2 | 5266 | /* Flags to pass to parse_and_execute() */ |
f486d0a1 | 5267 | pflags = (interactive && sourcelevel == 0) ? SEVAL_RESETLINE : 0; |
d3a24ed2 | 5268 | |
726f6388 JA |
5269 | /* Pipe the output of executing STRING into the current shell. */ |
5270 | if (pipe (fildes) < 0) | |
5271 | { | |
5e13499c | 5272 | sys_error (_("cannot make pipe for command substitution")); |
726f6388 JA |
5273 | goto error_exit; |
5274 | } | |
5275 | ||
5276 | old_pid = last_made_pid; | |
5277 | #if defined (JOB_CONTROL) | |
ccc6cda3 | 5278 | old_pipeline_pgrp = pipeline_pgrp; |
28ef6c31 JA |
5279 | /* Don't reset the pipeline pgrp if we're already a subshell in a pipeline. */ |
5280 | if ((subshell_environment & SUBSHELL_PIPE) == 0) | |
5281 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 5282 | cleanup_the_pipeline (); |
da719982 | 5283 | #endif /* JOB_CONTROL */ |
726f6388 | 5284 | |
cac4cdbf | 5285 | old_async_pid = last_asynchronous_pid; |
cac4cdbf | 5286 | pid = make_child ((char *)NULL, subshell_environment&SUBSHELL_ASYNC); |
cac4cdbf CR |
5287 | last_asynchronous_pid = old_async_pid; |
5288 | ||
726f6388 | 5289 | if (pid == 0) |
64419627 CR |
5290 | { |
5291 | /* Reset the signal handlers in the child, but don't free the | |
5292 | trap strings. Set a flag noting that we have to free the | |
5293 | trap strings if we run trap to change a signal disposition. */ | |
5294 | reset_signal_handlers (); | |
5295 | subshell_environment |= SUBSHELL_RESETTRAP; | |
5296 | } | |
ccc6cda3 JA |
5297 | |
5298 | #if defined (JOB_CONTROL) | |
525739ba | 5299 | /* XXX DO THIS ONLY IN PARENT ? XXX */ |
ccc6cda3 JA |
5300 | set_sigchld_handler (); |
5301 | stop_making_children (); | |
525739ba | 5302 | if (pid != 0) |
525739ba | 5303 | pipeline_pgrp = old_pipeline_pgrp; |
f73dda09 JA |
5304 | #else |
5305 | stop_making_children (); | |
ccc6cda3 | 5306 | #endif /* JOB_CONTROL */ |
726f6388 JA |
5307 | |
5308 | if (pid < 0) | |
5309 | { | |
5e13499c | 5310 | sys_error (_("cannot make child for command substitution")); |
726f6388 JA |
5311 | error_exit: |
5312 | ||
fd58d46e CR |
5313 | last_made_pid = old_pid; |
5314 | ||
726f6388 JA |
5315 | FREE (istring); |
5316 | close (fildes[0]); | |
5317 | close (fildes[1]); | |
d3ad40de | 5318 | return ((WORD_DESC *)NULL); |
726f6388 JA |
5319 | } |
5320 | ||
5321 | if (pid == 0) | |
5322 | { | |
5323 | set_sigint_handler (); /* XXX */ | |
28ef6c31 | 5324 | |
d3a24ed2 CR |
5325 | free_pushed_string_input (); |
5326 | ||
726f6388 JA |
5327 | if (dup2 (fildes[1], 1) < 0) |
5328 | { | |
5e13499c | 5329 | sys_error (_("command_substitute: cannot duplicate pipe as fd 1")); |
726f6388 JA |
5330 | exit (EXECUTION_FAILURE); |
5331 | } | |
5332 | ||
5333 | /* If standard output is closed in the parent shell | |
5334 | (such as after `exec >&-'), file descriptor 1 will be | |
5335 | the lowest available file descriptor, and end up in | |
5336 | fildes[0]. This can happen for stdin and stderr as well, | |
5337 | but stdout is more important -- it will cause no output | |
5338 | to be generated from this command. */ | |
5339 | if ((fildes[1] != fileno (stdin)) && | |
5340 | (fildes[1] != fileno (stdout)) && | |
5341 | (fildes[1] != fileno (stderr))) | |
5342 | close (fildes[1]); | |
5343 | ||
5344 | if ((fildes[0] != fileno (stdin)) && | |
5345 | (fildes[0] != fileno (stdout)) && | |
5346 | (fildes[0] != fileno (stderr))) | |
5347 | close (fildes[0]); | |
5348 | ||
54a1fa7c CR |
5349 | #ifdef __CYGWIN__ |
5350 | /* Let stdio know the fd may have changed from text to binary mode, and | |
5351 | make sure to preserve stdout line buffering. */ | |
5352 | freopen (NULL, "w", stdout); | |
5353 | sh_setlinebuf (stdout); | |
5354 | #endif /* __CYGWIN__ */ | |
5355 | ||
726f6388 JA |
5356 | /* The currently executing shell is not interactive. */ |
5357 | interactive = 0; | |
5358 | ||
ccc6cda3 | 5359 | /* This is a subshell environment. */ |
28ef6c31 | 5360 | subshell_environment |= SUBSHELL_COMSUB; |
ccc6cda3 | 5361 | |
28ef6c31 | 5362 | /* When not in POSIX mode, command substitution does not inherit |
7117c2d2 | 5363 | the -e flag. */ |
28ef6c31 | 5364 | if (posixly_correct == 0) |
26a8e19c | 5365 | { |
77b3aacb CR |
5366 | builtin_ignoring_errexit = 0; |
5367 | change_flag ('e', FLAG_OFF); | |
26a8e19c CR |
5368 | set_shellopts (); |
5369 | } | |
726f6388 JA |
5370 | |
5371 | remove_quoted_escapes (string); | |
5372 | ||
ccc6cda3 | 5373 | startup_state = 2; /* see if we can avoid a fork */ |
726f6388 JA |
5374 | /* Give command substitution a place to jump back to on failure, |
5375 | so we don't go back up to main (). */ | |
36eb585c | 5376 | result = setjmp_nosigs (top_level); |
726f6388 | 5377 | |
bb70624e JA |
5378 | /* If we're running a command substitution inside a shell function, |
5379 | trap `return' so we don't return from the function in the subshell | |
5380 | and go off to never-never land. */ | |
5381 | if (result == 0 && return_catch_flag) | |
36eb585c | 5382 | function_value = setjmp_nosigs (return_catch); |
bb70624e JA |
5383 | else |
5384 | function_value = 0; | |
5385 | ||
d3a24ed2 | 5386 | if (result == ERREXIT) |
5e13499c | 5387 | rc = last_command_exit_value; |
d3a24ed2 | 5388 | else if (result == EXITPROG) |
5e13499c | 5389 | rc = last_command_exit_value; |
726f6388 | 5390 | else if (result) |
5e13499c | 5391 | rc = EXECUTION_FAILURE; |
bb70624e | 5392 | else if (function_value) |
5e13499c | 5393 | rc = return_catch_value; |
726f6388 | 5394 | else |
d3a24ed2 CR |
5395 | { |
5396 | subshell_level++; | |
5397 | rc = parse_and_execute (string, "command substitution", pflags|SEVAL_NOHIST); | |
5398 | subshell_level--; | |
d3a24ed2 | 5399 | } |
5e13499c CR |
5400 | |
5401 | last_command_exit_value = rc; | |
5402 | rc = run_exit_trap (); | |
d3ad40de CR |
5403 | #if defined (PROCESS_SUBSTITUTION) |
5404 | unlink_fifo_list (); | |
5405 | #endif | |
5e13499c | 5406 | exit (rc); |
726f6388 JA |
5407 | } |
5408 | else | |
5409 | { | |
726f6388 JA |
5410 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) |
5411 | close_pgrp_pipe (); | |
5412 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
5413 | ||
5414 | close (fildes[1]); | |
5415 | ||
d3ad40de CR |
5416 | tflag = 0; |
5417 | istring = read_comsub (fildes[0], quoted, &tflag); | |
ccc6cda3 | 5418 | |
726f6388 JA |
5419 | close (fildes[0]); |
5420 | ||
b72432fd | 5421 | current_command_subst_pid = pid; |
726f6388 JA |
5422 | last_command_exit_value = wait_for (pid); |
5423 | last_command_subst_pid = pid; | |
5424 | last_made_pid = old_pid; | |
5425 | ||
5426 | #if defined (JOB_CONTROL) | |
5427 | /* If last_command_exit_value > 128, then the substituted command | |
5428 | was terminated by a signal. If that signal was SIGINT, then send | |
5429 | SIGINT to ourselves. This will break out of loops, for instance. */ | |
d3a24ed2 | 5430 | if (last_command_exit_value == (128 + SIGINT) && last_command_exit_signal == SIGINT) |
726f6388 JA |
5431 | kill (getpid (), SIGINT); |
5432 | ||
5433 | /* wait_for gives the terminal back to shell_pgrp. If some other | |
cce855bc JA |
5434 | process group should have it, give it away to that group here. |
5435 | pipeline_pgrp is non-zero only while we are constructing a | |
5436 | pipline, so what we are concerned about is whether or not that | |
5437 | pipeline was started in the background. A pipeline started in | |
5438 | the background should never get the tty back here. */ | |
28ef6c31 | 5439 | if (interactive && pipeline_pgrp != (pid_t)0 && (subshell_environment & SUBSHELL_ASYNC) == 0) |
28ef6c31 | 5440 | give_terminal_to (pipeline_pgrp, 0); |
726f6388 JA |
5441 | #endif /* JOB_CONTROL */ |
5442 | ||
d3ad40de CR |
5443 | ret = alloc_word_desc (); |
5444 | ret->word = istring; | |
5445 | ret->flags = tflag; | |
5446 | ||
5447 | return ret; | |
726f6388 JA |
5448 | } |
5449 | } | |
5450 | ||
5451 | /******************************************************** | |
5452 | * * | |
5453 | * Utility functions for parameter expansion * | |
5454 | * * | |
5455 | ********************************************************/ | |
5456 | ||
ccc6cda3 | 5457 | #if defined (ARRAY_VARS) |
ccc6cda3 | 5458 | |
f73dda09 | 5459 | static arrayind_t |
ccc6cda3 JA |
5460 | array_length_reference (s) |
5461 | char *s; | |
5462 | { | |
f73dda09 JA |
5463 | int len; |
5464 | arrayind_t ind; | |
fdf670ea | 5465 | char *akey; |
f73dda09 | 5466 | char *t, c; |
ccc6cda3 | 5467 | ARRAY *array; |
68dfe178 | 5468 | HASH_TABLE *h; |
ccc6cda3 JA |
5469 | SHELL_VAR *var; |
5470 | ||
5471 | var = array_variable_part (s, &t, &len); | |
726f6388 | 5472 | |
ccc6cda3 JA |
5473 | /* If unbound variables should generate an error, report one and return |
5474 | failure. */ | |
fdf670ea | 5475 | if ((var == 0 || (assoc_p (var) == 0 && array_p (var) == 0)) && unbound_vars_is_error) |
726f6388 | 5476 | { |
f73dda09 | 5477 | c = *--t; |
ccc6cda3 | 5478 | *t = '\0'; |
0d8616ff | 5479 | last_command_exit_value = EXECUTION_FAILURE; |
7117c2d2 | 5480 | err_unboundvar (s); |
f73dda09 | 5481 | *t = c; |
ccc6cda3 | 5482 | return (-1); |
726f6388 | 5483 | } |
ccc6cda3 JA |
5484 | else if (var == 0) |
5485 | return 0; | |
726f6388 | 5486 | |
28ef6c31 JA |
5487 | /* We support a couple of expansions for variables that are not arrays. |
5488 | We'll return the length of the value for v[0], and 1 for v[@] or | |
5489 | v[*]. Return 0 for everything else. */ | |
5490 | ||
5491 | array = array_p (var) ? array_cell (var) : (ARRAY *)NULL; | |
68dfe178 | 5492 | h = assoc_p (var) ? assoc_cell (var) : (HASH_TABLE *)NULL; |
726f6388 | 5493 | |
ccc6cda3 | 5494 | if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']') |
ccc6cda3 | 5495 | { |
fdf670ea | 5496 | if (assoc_p (var)) |
68dfe178 | 5497 | return (h ? assoc_num_elements (h) : 0); |
fdf670ea | 5498 | else if (array_p (var)) |
68dfe178 | 5499 | return (array ? array_num_elements (array) : 0); |
fdf670ea | 5500 | else |
68dfe178 | 5501 | return (var_isset (var) ? 1 : 0); |
ccc6cda3 | 5502 | } |
ccc6cda3 | 5503 | |
fdf670ea CR |
5504 | if (assoc_p (var)) |
5505 | { | |
5506 | t[len - 1] = '\0'; | |
09767ff0 | 5507 | akey = expand_assignment_string_to_string (t, 0); /* [ */ |
fdf670ea CR |
5508 | t[len - 1] = ']'; |
5509 | if (akey == 0 || *akey == 0) | |
5510 | { | |
5511 | err_badarraysub (t); | |
631b20c6 | 5512 | FREE (akey); |
fdf670ea CR |
5513 | return (-1); |
5514 | } | |
5515 | t = assoc_reference (assoc_cell (var), akey); | |
631b20c6 | 5516 | free (akey); |
fdf670ea | 5517 | } |
28ef6c31 | 5518 | else |
fdf670ea | 5519 | { |
d9e1f41e | 5520 | ind = array_expand_index (var, t, len); |
a7ad477f CR |
5521 | /* negative subscripts to indexed arrays count back from end */ |
5522 | if (var && array_p (var) && ind < 0) | |
5523 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
fdf670ea CR |
5524 | if (ind < 0) |
5525 | { | |
5526 | err_badarraysub (t); | |
5527 | return (-1); | |
5528 | } | |
5529 | if (array_p (var)) | |
5530 | t = array_reference (array, ind); | |
5531 | else | |
5532 | t = (ind == 0) ? value_cell (var) : (char *)NULL; | |
5533 | } | |
28ef6c31 | 5534 | |
30915f17 | 5535 | len = MB_STRLEN (t); |
ccc6cda3 | 5536 | return (len); |
726f6388 | 5537 | } |
ccc6cda3 | 5538 | #endif /* ARRAY_VARS */ |
726f6388 JA |
5539 | |
5540 | static int | |
5541 | valid_brace_expansion_word (name, var_is_special) | |
5542 | char *name; | |
5543 | int var_is_special; | |
5544 | { | |
f73dda09 | 5545 | if (DIGIT (*name) && all_digits (name)) |
726f6388 JA |
5546 | return 1; |
5547 | else if (var_is_special) | |
5548 | return 1; | |
ccc6cda3 JA |
5549 | #if defined (ARRAY_VARS) |
5550 | else if (valid_array_reference (name)) | |
5551 | return 1; | |
5552 | #endif /* ARRAY_VARS */ | |
726f6388 JA |
5553 | else if (legal_identifier (name)) |
5554 | return 1; | |
5555 | else | |
5556 | return 0; | |
5557 | } | |
ccc6cda3 | 5558 | |
d3a24ed2 CR |
5559 | static int |
5560 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at) | |
5561 | char *name; | |
5562 | int quoted; | |
5563 | int *quoted_dollar_atp, *contains_dollar_at; | |
5564 | { | |
5565 | char *temp1; | |
5566 | ||
5567 | if (name == 0) | |
5568 | { | |
5569 | if (quoted_dollar_atp) | |
5570 | *quoted_dollar_atp = 0; | |
5571 | if (contains_dollar_at) | |
5572 | *contains_dollar_at = 0; | |
5573 | return 0; | |
5574 | } | |
5575 | ||
5576 | /* check for $@ and $* */ | |
5577 | if (name[0] == '@' && name[1] == 0) | |
5578 | { | |
5579 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5580 | *quoted_dollar_atp = 1; | |
5581 | if (contains_dollar_at) | |
5582 | *contains_dollar_at = 1; | |
5583 | return 1; | |
5584 | } | |
5585 | else if (name[0] == '*' && name[1] == '\0' && quoted == 0) | |
5586 | { | |
5587 | if (contains_dollar_at) | |
5588 | *contains_dollar_at = 1; | |
5589 | return 1; | |
5590 | } | |
5591 | ||
5592 | /* Now check for ${array[@]} and ${array[*]} */ | |
5593 | #if defined (ARRAY_VARS) | |
5594 | else if (valid_array_reference (name)) | |
5595 | { | |
d0ca3503 | 5596 | temp1 = mbschr (name, '['); |
d3a24ed2 CR |
5597 | if (temp1 && temp1[1] == '@' && temp1[2] == ']') |
5598 | { | |
5599 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5600 | *quoted_dollar_atp = 1; | |
5601 | if (contains_dollar_at) | |
5602 | *contains_dollar_at = 1; | |
5603 | return 1; | |
5604 | } /* [ */ | |
5605 | /* ${array[*]}, when unquoted, should be treated like ${array[@]}, | |
5606 | which should result in separate words even when IFS is unset. */ | |
5607 | if (temp1 && temp1[1] == '*' && temp1[2] == ']' && quoted == 0) | |
5608 | { | |
5609 | if (contains_dollar_at) | |
5610 | *contains_dollar_at = 1; | |
5611 | return 1; | |
5612 | } | |
5613 | } | |
5614 | #endif | |
5615 | return 0; | |
5616 | } | |
5617 | ||
726f6388 JA |
5618 | /* Parameter expand NAME, and return a new string which is the expansion, |
5619 | or NULL if there was no expansion. | |
5620 | VAR_IS_SPECIAL is non-zero if NAME is one of the special variables in | |
5621 | the shell, e.g., "@", "$", "*", etc. QUOTED, if non-zero, means that | |
5622 | NAME was found inside of a double-quoted expression. */ | |
227f982e | 5623 | static WORD_DESC * |
5f8cde23 | 5624 | parameter_brace_expand_word (name, var_is_special, quoted, pflags, indp) |
726f6388 | 5625 | char *name; |
1231ac47 | 5626 | int var_is_special, quoted, pflags; |
5f8cde23 | 5627 | arrayind_t *indp; |
726f6388 | 5628 | { |
227f982e | 5629 | WORD_DESC *ret; |
ccc6cda3 | 5630 | char *temp, *tt; |
7117c2d2 | 5631 | intmax_t arg_index; |
ccc6cda3 | 5632 | SHELL_VAR *var; |
b1a26c01 | 5633 | int atype, rflags; |
5f8cde23 | 5634 | arrayind_t ind; |
726f6388 | 5635 | |
227f982e CR |
5636 | ret = 0; |
5637 | temp = 0; | |
b1a26c01 | 5638 | rflags = 0; |
227f982e | 5639 | |
5f8cde23 CR |
5640 | if (indp) |
5641 | *indp = INTMAX_MIN; | |
5642 | ||
227f982e | 5643 | /* Handle multiple digit arguments, as in ${11}. */ |
f73dda09 | 5644 | if (legal_number (name, &arg_index)) |
7117c2d2 JA |
5645 | { |
5646 | tt = get_dollar_var_value (arg_index); | |
762a763b CR |
5647 | if (tt) |
5648 | temp = (*tt && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
5649 | ? quote_string (tt) | |
5650 | : quote_escapes (tt); | |
5651 | else | |
5652 | temp = (char *)NULL; | |
7117c2d2 JA |
5653 | FREE (tt); |
5654 | } | |
726f6388 JA |
5655 | else if (var_is_special) /* ${@} */ |
5656 | { | |
cce855bc | 5657 | int sindex; |
f73dda09 | 5658 | tt = (char *)xmalloc (2 + strlen (name)); |
cce855bc | 5659 | tt[sindex = 0] = '$'; |
726f6388 | 5660 | strcpy (tt + 1, name); |
7117c2d2 | 5661 | |
227f982e | 5662 | ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL, |
1231ac47 | 5663 | (int *)NULL, (int *)NULL, pflags); |
cce855bc | 5664 | free (tt); |
726f6388 | 5665 | } |
ccc6cda3 JA |
5666 | #if defined (ARRAY_VARS) |
5667 | else if (valid_array_reference (name)) | |
5668 | { | |
d42cb8c1 | 5669 | expand_arrayref: |
631b20c6 | 5670 | /* XXX - does this leak if name[@] or name[*]? */ |
208fdb50 CR |
5671 | if (pflags & PF_ASSIGNRHS) |
5672 | { | |
5673 | temp = array_variable_name (name, &tt, (int *)0); | |
5674 | if (ALL_ELEMENT_SUB (tt[0]) && tt[1] == ']') | |
5675 | temp = array_value (name, quoted|Q_DOUBLE_QUOTES, 0, &atype, &ind); | |
5676 | else | |
5677 | temp = array_value (name, quoted, 0, &atype, &ind); | |
5678 | } | |
5679 | else | |
5680 | temp = array_value (name, quoted, 0, &atype, &ind); | |
7117c2d2 | 5681 | if (atype == 0 && temp) |
5f8cde23 CR |
5682 | { |
5683 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
5684 | ? quote_string (temp) | |
5685 | : quote_escapes (temp); | |
5686 | rflags |= W_ARRAYIND; | |
5687 | if (indp) | |
5688 | *indp = ind; | |
5689 | } | |
b1a26c01 CR |
5690 | else if (atype == 1 && temp && QUOTED_NULL (temp) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5691 | rflags |= W_HASQUOTEDNULL; | |
ccc6cda3 JA |
5692 | } |
5693 | #endif | |
5694 | else if (var = find_variable (name)) | |
5695 | { | |
7117c2d2 | 5696 | if (var_isset (var) && invisible_p (var) == 0) |
28ef6c31 | 5697 | { |
ccc6cda3 | 5698 | #if defined (ARRAY_VARS) |
fdf670ea CR |
5699 | if (assoc_p (var)) |
5700 | temp = assoc_reference (assoc_cell (var), "0"); | |
5701 | else if (array_p (var)) | |
5702 | temp = array_reference (array_cell (var), 0); | |
5703 | else | |
5704 | temp = value_cell (var); | |
ccc6cda3 JA |
5705 | #else |
5706 | temp = value_cell (var); | |
5707 | #endif | |
5708 | ||
5709 | if (temp) | |
762a763b CR |
5710 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5711 | ? quote_string (temp) | |
5712 | : quote_escapes (temp); | |
28ef6c31 | 5713 | } |
ccc6cda3 JA |
5714 | else |
5715 | temp = (char *)NULL; | |
5716 | } | |
d42cb8c1 CR |
5717 | else if (var = find_variable_last_nameref (name)) |
5718 | { | |
5719 | temp = nameref_cell (var); | |
15623760 CR |
5720 | #if defined (ARRAY_VARS) |
5721 | /* Handle expanding nameref whose value is x[n] */ | |
d42cb8c1 CR |
5722 | if (temp && *temp && valid_array_reference (temp)) |
5723 | { | |
5724 | name = temp; | |
5725 | goto expand_arrayref; | |
5726 | } | |
d42cb8c1 | 5727 | #endif |
15623760 CR |
5728 | /* y=2 ; typeset -n x=y; echo ${x} is not the same as echo ${2} in ksh */ |
5729 | else if (temp && *temp && legal_identifier (temp) == 0) | |
5730 | { | |
5731 | last_command_exit_value = EXECUTION_FAILURE; | |
5732 | report_error (_("%s: invalid variable name for name reference"), temp); | |
5733 | temp = &expand_param_error; | |
5734 | } | |
5735 | else | |
5736 | temp = (char *)NULL; | |
5737 | } | |
726f6388 | 5738 | else |
ccc6cda3 | 5739 | temp = (char *)NULL; |
726f6388 | 5740 | |
227f982e CR |
5741 | if (ret == 0) |
5742 | { | |
5743 | ret = alloc_word_desc (); | |
5744 | ret->word = temp; | |
b1a26c01 | 5745 | ret->flags |= rflags; |
227f982e CR |
5746 | } |
5747 | return ret; | |
726f6388 JA |
5748 | } |
5749 | ||
ccc6cda3 JA |
5750 | /* Expand an indirect reference to a variable: ${!NAME} expands to the |
5751 | value of the variable whose name is the value of NAME. */ | |
227f982e | 5752 | static WORD_DESC * |
d3a24ed2 | 5753 | parameter_brace_expand_indir (name, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at) |
ccc6cda3 JA |
5754 | char *name; |
5755 | int var_is_special, quoted; | |
d3a24ed2 | 5756 | int *quoted_dollar_atp, *contains_dollar_at; |
ccc6cda3 JA |
5757 | { |
5758 | char *temp, *t; | |
227f982e | 5759 | WORD_DESC *w; |
d42cb8c1 CR |
5760 | SHELL_VAR *v; |
5761 | ||
5762 | /* See if it's a nameref first, behave in ksh93-compatible fashion. | |
5763 | There is at least one incompatibility: given ${!foo[0]} where foo=bar, | |
5764 | bash performs an indirect lookup on foo[0] and expands the result; | |
5765 | ksh93 expands bar[0]. We could do that here -- there are enough usable | |
5766 | primitives to do that -- but do not at this point. */ | |
5767 | if (var_is_special == 0 && (v = find_variable_last_nameref (name))) | |
5768 | { | |
5769 | if (nameref_p (v) && (t = nameref_cell (v)) && *t) | |
5770 | { | |
5771 | w = alloc_word_desc (); | |
5772 | w->word = savestring (t); | |
5773 | w->flags = 0; | |
5774 | return w; | |
5775 | } | |
5776 | } | |
ccc6cda3 | 5777 | |
15623760 CR |
5778 | /* If var_is_special == 0, and name is not an array reference, this does |
5779 | more expansion than necessary. It should really look up the variable's | |
5780 | value and not try to expand it. */ | |
5f8cde23 | 5781 | w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND, 0); |
227f982e | 5782 | t = w->word; |
762a763b CR |
5783 | /* Have to dequote here if necessary */ |
5784 | if (t) | |
5785 | { | |
5786 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
5787 | ? dequote_string (t) | |
5788 | : dequote_escapes (t); | |
5789 | free (t); | |
5790 | t = temp; | |
5791 | } | |
227f982e CR |
5792 | dispose_word_desc (w); |
5793 | ||
d3a24ed2 | 5794 | chk_atstar (t, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 | 5795 | if (t == 0) |
227f982e CR |
5796 | return (WORD_DESC *)NULL; |
5797 | ||
5f8cde23 | 5798 | w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0, 0); |
ccc6cda3 | 5799 | free (t); |
227f982e CR |
5800 | |
5801 | return w; | |
ccc6cda3 JA |
5802 | } |
5803 | ||
726f6388 JA |
5804 | /* Expand the right side of a parameter expansion of the form ${NAMEcVALUE}, |
5805 | depending on the value of C, the separating character. C can be one of | |
ccc6cda3 JA |
5806 | "-", "+", or "=". QUOTED is true if the entire brace expression occurs |
5807 | between double quotes. */ | |
227f982e | 5808 | static WORD_DESC * |
ccc6cda3 | 5809 | parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat) |
726f6388 | 5810 | char *name, *value; |
ccc6cda3 | 5811 | int c, quoted, *qdollaratp, *hasdollarat; |
726f6388 | 5812 | { |
227f982e | 5813 | WORD_DESC *w; |
726f6388 JA |
5814 | WORD_LIST *l; |
5815 | char *t, *t1, *temp; | |
ccc6cda3 | 5816 | int hasdol; |
726f6388 | 5817 | |
ccc6cda3 JA |
5818 | /* If the entire expression is between double quotes, we want to treat |
5819 | the value as a double-quoted string, with the exception that we strip | |
d3ad40de | 5820 | embedded unescaped double quotes (for sh backwards compatibility). */ |
22e63b05 | 5821 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *value) |
726f6388 | 5822 | { |
ccc6cda3 | 5823 | hasdol = 0; |
22e63b05 | 5824 | temp = string_extract_double_quoted (value, &hasdol, 1); |
726f6388 | 5825 | } |
22e63b05 CR |
5826 | else |
5827 | temp = value; | |
ccc6cda3 | 5828 | |
227f982e | 5829 | w = alloc_word_desc (); |
726f6388 | 5830 | hasdol = 0; |
ccc6cda3 JA |
5831 | /* XXX was 0 not quoted */ |
5832 | l = *temp ? expand_string_for_rhs (temp, quoted, &hasdol, (int *)NULL) | |
5833 | : (WORD_LIST *)0; | |
5834 | if (hasdollarat) | |
5835 | *hasdollarat = hasdol || (l && l->next); | |
22e63b05 CR |
5836 | if (temp != value) |
5837 | free (temp); | |
726f6388 JA |
5838 | if (l) |
5839 | { | |
ccc6cda3 | 5840 | /* The expansion of TEMP returned something. We need to treat things |
12d937f9 CR |
5841 | slightly differently if HASDOL is non-zero. If we have "$@", the |
5842 | individual words have already been quoted. We need to turn them | |
5843 | into a string with the words separated by the first character of | |
5844 | $IFS without any additional quoting, so string_list_dollar_at won't | |
5845 | do the right thing. We use string_list_dollar_star instead. */ | |
5846 | temp = (hasdol || l->next) ? string_list_dollar_star (l) : string_list (l); | |
5847 | ||
ccc6cda3 JA |
5848 | /* If l->next is not null, we know that TEMP contained "$@", since that |
5849 | is the only expansion that creates more than one word. */ | |
12d937f9 | 5850 | if (qdollaratp && ((hasdol && quoted) || l->next)) |
ccc6cda3 | 5851 | *qdollaratp = 1; |
ec860d76 CR |
5852 | /* If we have a quoted null result (QUOTED_NULL(temp)) and the word is |
5853 | a quoted null (l->next == 0 && QUOTED_NULL(l->word->word)), the | |
5854 | flags indicate it (l->word->flags & W_HASQUOTEDNULL), and the | |
5855 | expansion is quoted (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
5856 | (which is more paranoia than anything else), we need to return the | |
5857 | quoted null string and set the flags to indicate it. */ | |
5858 | if (l->next == 0 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp) && QUOTED_NULL (l->word->word) && (l->word->flags & W_HASQUOTEDNULL)) | |
5859 | { | |
5860 | w->flags |= W_HASQUOTEDNULL; | |
5861 | } | |
726f6388 JA |
5862 | dispose_words (l); |
5863 | } | |
ccc6cda3 | 5864 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol) |
726f6388 | 5865 | { |
ccc6cda3 JA |
5866 | /* The brace expansion occurred between double quotes and there was |
5867 | a $@ in TEMP. It does not matter if the $@ is quoted, as long as | |
7117c2d2 JA |
5868 | it does not expand to anything. In this case, we want to return |
5869 | a quoted empty string. */ | |
d3ad40de | 5870 | temp = make_quoted_char ('\0'); |
227f982e | 5871 | w->flags |= W_HASQUOTEDNULL; |
726f6388 JA |
5872 | } |
5873 | else | |
5874 | temp = (char *)NULL; | |
5875 | ||
5876 | if (c == '-' || c == '+') | |
227f982e CR |
5877 | { |
5878 | w->word = temp; | |
5879 | return w; | |
5880 | } | |
726f6388 JA |
5881 | |
5882 | /* c == '=' */ | |
ccc6cda3 | 5883 | t = temp ? savestring (temp) : savestring (""); |
726f6388 JA |
5884 | t1 = dequote_string (t); |
5885 | free (t); | |
d3a24ed2 CR |
5886 | #if defined (ARRAY_VARS) |
5887 | if (valid_array_reference (name)) | |
d11b8b46 | 5888 | assign_array_element (name, t1, 0); |
d3a24ed2 CR |
5889 | else |
5890 | #endif /* ARRAY_VARS */ | |
d11b8b46 | 5891 | bind_variable (name, t1, 0); |
f0c4de40 | 5892 | #if 0 |
ad4aef08 | 5893 | if (STREQ (name, "IFS") == 0) |
f0c4de40 | 5894 | #endif |
ad4aef08 | 5895 | stupidly_hack_special_variables (name); |
227f982e | 5896 | |
9e51a74d | 5897 | /* From Posix group discussion Feb-March 2010. Issue 7 0000221 */ |
64419627 CR |
5898 | free (temp); |
5899 | ||
5900 | w->word = t1; | |
227f982e | 5901 | return w; |
726f6388 JA |
5902 | } |
5903 | ||
5904 | /* Deal with the right hand side of a ${name:?value} expansion in the case | |
5905 | that NAME is null or not set. If VALUE is non-null it is expanded and | |
5906 | used as the error message to print, otherwise a standard message is | |
5907 | printed. */ | |
5908 | static void | |
5909 | parameter_brace_expand_error (name, value) | |
5910 | char *name, *value; | |
5911 | { | |
ccc6cda3 JA |
5912 | WORD_LIST *l; |
5913 | char *temp; | |
5914 | ||
7f947b68 | 5915 | last_command_exit_value = EXECUTION_FAILURE; /* ensure it's non-zero */ |
726f6388 JA |
5916 | if (value && *value) |
5917 | { | |
22e63b05 | 5918 | l = expand_string (value, 0); |
ccc6cda3 JA |
5919 | temp = string_list (l); |
5920 | report_error ("%s: %s", name, temp ? temp : ""); /* XXX was value not "" */ | |
5921 | FREE (temp); | |
726f6388 JA |
5922 | dispose_words (l); |
5923 | } | |
5924 | else | |
5e13499c | 5925 | report_error (_("%s: parameter null or not set"), name); |
726f6388 JA |
5926 | |
5927 | /* Free the data we have allocated during this expansion, since we | |
5928 | are about to longjmp out. */ | |
5929 | free (name); | |
5930 | FREE (value); | |
5931 | } | |
5932 | ||
5933 | /* Return 1 if NAME is something for which parameter_brace_expand_length is | |
5934 | OK to do. */ | |
5935 | static int | |
5936 | valid_length_expression (name) | |
5937 | char *name; | |
5938 | { | |
28ef6c31 | 5939 | return (name[1] == '\0' || /* ${#} */ |
f73dda09 JA |
5940 | ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') || /* special param */ |
5941 | (DIGIT (name[1]) && all_digits (name + 1)) || /* ${#11} */ | |
ccc6cda3 JA |
5942 | #if defined (ARRAY_VARS) |
5943 | valid_array_reference (name + 1) || /* ${#a[7]} */ | |
5944 | #endif | |
726f6388 JA |
5945 | legal_identifier (name + 1)); /* ${#PS1} */ |
5946 | } | |
5947 | ||
5948 | /* Handle the parameter brace expansion that requires us to return the | |
5949 | length of a parameter. */ | |
7117c2d2 | 5950 | static intmax_t |
726f6388 JA |
5951 | parameter_brace_expand_length (name) |
5952 | char *name; | |
5953 | { | |
ccc6cda3 | 5954 | char *t, *newname; |
7117c2d2 | 5955 | intmax_t number, arg_index; |
ccc6cda3 JA |
5956 | WORD_LIST *list; |
5957 | #if defined (ARRAY_VARS) | |
5958 | SHELL_VAR *var; | |
5959 | #endif | |
5960 | ||
5961 | if (name[1] == '\0') /* ${#} */ | |
5962 | number = number_of_args (); | |
cce855bc JA |
5963 | else if ((name[1] == '@' || name[1] == '*') && name[2] == '\0') /* ${#@}, ${#*} */ |
5964 | number = number_of_args (); | |
f73dda09 | 5965 | else if ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') |
cce855bc JA |
5966 | { |
5967 | /* Take the lengths of some of the shell's special parameters. */ | |
5968 | switch (name[1]) | |
5969 | { | |
5970 | case '-': | |
5971 | t = which_set_flags (); | |
5972 | break; | |
5973 | case '?': | |
5974 | t = itos (last_command_exit_value); | |
5975 | break; | |
5976 | case '$': | |
5977 | t = itos (dollar_dollar_pid); | |
5978 | break; | |
5979 | case '!': | |
5980 | if (last_asynchronous_pid == NO_PID) | |
e05be32d | 5981 | t = (char *)NULL; /* XXX - error if set -u set? */ |
cce855bc | 5982 | else |
f73dda09 | 5983 | t = itos (last_asynchronous_pid); |
cce855bc JA |
5984 | break; |
5985 | case '#': | |
5986 | t = itos (number_of_args ()); | |
5987 | break; | |
5988 | } | |
5989 | number = STRLEN (t); | |
5990 | FREE (t); | |
5991 | } | |
ccc6cda3 JA |
5992 | #if defined (ARRAY_VARS) |
5993 | else if (valid_array_reference (name + 1)) | |
5994 | number = array_length_reference (name + 1); | |
5995 | #endif /* ARRAY_VARS */ | |
cce855bc | 5996 | else |
ccc6cda3 JA |
5997 | { |
5998 | number = 0; | |
5999 | ||
f73dda09 | 6000 | if (legal_number (name + 1, &arg_index)) /* ${#1} */ |
ccc6cda3 | 6001 | { |
f73dda09 | 6002 | t = get_dollar_var_value (arg_index); |
e05be32d CR |
6003 | if (t == 0 && unbound_vars_is_error) |
6004 | return INTMAX_MIN; | |
898cc92e | 6005 | number = MB_STRLEN (t); |
ccc6cda3 JA |
6006 | FREE (t); |
6007 | } | |
6008 | #if defined (ARRAY_VARS) | |
fdf670ea | 6009 | else if ((var = find_variable (name + 1)) && (invisible_p (var) == 0) && (array_p (var) || assoc_p (var))) |
ccc6cda3 | 6010 | { |
fdf670ea CR |
6011 | if (assoc_p (var)) |
6012 | t = assoc_reference (assoc_cell (var), "0"); | |
6013 | else | |
6014 | t = array_reference (array_cell (var), 0); | |
e05be32d CR |
6015 | if (t == 0 && unbound_vars_is_error) |
6016 | return INTMAX_MIN; | |
898cc92e | 6017 | number = MB_STRLEN (t); |
ccc6cda3 JA |
6018 | } |
6019 | #endif | |
6020 | else /* ${#PS1} */ | |
6021 | { | |
6022 | newname = savestring (name); | |
6023 | newname[0] = '$'; | |
6024 | list = expand_string (newname, Q_DOUBLE_QUOTES); | |
6025 | t = list ? string_list (list) : (char *)NULL; | |
6026 | free (newname); | |
6027 | if (list) | |
6028 | dispose_words (list); | |
6029 | ||
adc6cff5 | 6030 | number = t ? MB_STRLEN (t) : 0; |
ccc6cda3 JA |
6031 | FREE (t); |
6032 | } | |
6033 | } | |
ccc6cda3 JA |
6034 | |
6035 | return (number); | |
6036 | } | |
6037 | ||
28ef6c31 JA |
6038 | /* Skip characters in SUBSTR until DELIM. SUBSTR is an arithmetic expression, |
6039 | so we do some ad-hoc parsing of an arithmetic expression to find | |
6040 | the first DELIM, instead of using strchr(3). Two rules: | |
6041 | 1. If the substring contains a `(', read until closing `)'. | |
6042 | 2. If the substring contains a `?', read past one `:' for each `?'. | |
6043 | */ | |
6044 | ||
6045 | static char * | |
6046 | skiparith (substr, delim) | |
6047 | char *substr; | |
6048 | int delim; | |
6049 | { | |
7117c2d2 JA |
6050 | size_t sublen; |
6051 | int skipcol, pcount, i; | |
6052 | DECLARE_MBSTATE; | |
28ef6c31 | 6053 | |
7117c2d2 JA |
6054 | sublen = strlen (substr); |
6055 | i = skipcol = pcount = 0; | |
6056 | while (substr[i]) | |
28ef6c31 JA |
6057 | { |
6058 | /* Balance parens */ | |
7117c2d2 | 6059 | if (substr[i] == LPAREN) |
28ef6c31 JA |
6060 | { |
6061 | pcount++; | |
7117c2d2 | 6062 | i++; |
28ef6c31 JA |
6063 | continue; |
6064 | } | |
7117c2d2 | 6065 | if (substr[i] == RPAREN && pcount) |
28ef6c31 JA |
6066 | { |
6067 | pcount--; | |
7117c2d2 | 6068 | i++; |
28ef6c31 JA |
6069 | continue; |
6070 | } | |
6071 | if (pcount) | |
7117c2d2 JA |
6072 | { |
6073 | ADVANCE_CHAR (substr, sublen, i); | |
6074 | continue; | |
6075 | } | |
28ef6c31 JA |
6076 | |
6077 | /* Skip one `:' for each `?' */ | |
7117c2d2 | 6078 | if (substr[i] == ':' && skipcol) |
28ef6c31 JA |
6079 | { |
6080 | skipcol--; | |
7117c2d2 | 6081 | i++; |
28ef6c31 JA |
6082 | continue; |
6083 | } | |
7117c2d2 | 6084 | if (substr[i] == delim) |
28ef6c31 | 6085 | break; |
7117c2d2 | 6086 | if (substr[i] == '?') |
28ef6c31 JA |
6087 | { |
6088 | skipcol++; | |
7117c2d2 | 6089 | i++; |
28ef6c31 JA |
6090 | continue; |
6091 | } | |
7117c2d2 | 6092 | ADVANCE_CHAR (substr, sublen, i); |
28ef6c31 | 6093 | } |
7117c2d2 JA |
6094 | |
6095 | return (substr + i); | |
28ef6c31 JA |
6096 | } |
6097 | ||
ccc6cda3 JA |
6098 | /* Verify and limit the start and end of the desired substring. If |
6099 | VTYPE == 0, a regular shell variable is being used; if it is 1, | |
cce855bc | 6100 | then the positional parameters are being used; if it is 2, then |
e8ce775d JA |
6101 | VALUE is really a pointer to an array variable that should be used. |
6102 | Return value is 1 if both values were OK, 0 if there was a problem | |
6103 | with an invalid expression, or -1 if the values were out of range. */ | |
ccc6cda3 | 6104 | static int |
09767ff0 CR |
6105 | verify_substring_values (v, value, substr, vtype, e1p, e2p) |
6106 | SHELL_VAR *v; | |
ccc6cda3 | 6107 | char *value, *substr; |
f73dda09 | 6108 | int vtype; |
7117c2d2 | 6109 | intmax_t *e1p, *e2p; |
ccc6cda3 | 6110 | { |
bb70624e | 6111 | char *t, *temp1, *temp2; |
f73dda09 JA |
6112 | arrayind_t len; |
6113 | int expok; | |
ccc6cda3 JA |
6114 | #if defined (ARRAY_VARS) |
6115 | ARRAY *a; | |
09767ff0 | 6116 | HASH_TABLE *h; |
ccc6cda3 JA |
6117 | #endif |
6118 | ||
28ef6c31 JA |
6119 | /* duplicate behavior of strchr(3) */ |
6120 | t = skiparith (substr, ':'); | |
6121 | if (*t && *t == ':') | |
7117c2d2 | 6122 | *t = '\0'; |
28ef6c31 JA |
6123 | else |
6124 | t = (char *)0; | |
f73dda09 | 6125 | |
d3ad40de | 6126 | temp1 = expand_arith_string (substr, Q_DOUBLE_QUOTES); |
d166f048 | 6127 | *e1p = evalexp (temp1, &expok); |
ccc6cda3 | 6128 | free (temp1); |
d166f048 JA |
6129 | if (expok == 0) |
6130 | return (0); | |
ccc6cda3 | 6131 | |
f73dda09 | 6132 | len = -1; /* paranoia */ |
ccc6cda3 JA |
6133 | switch (vtype) |
6134 | { | |
6135 | case VT_VARIABLE: | |
d166f048 | 6136 | case VT_ARRAYMEMBER: |
898cc92e | 6137 | len = MB_STRLEN (value); |
ccc6cda3 JA |
6138 | break; |
6139 | case VT_POSPARMS: | |
6140 | len = number_of_args () + 1; | |
d3ad40de CR |
6141 | if (*e1p == 0) |
6142 | len++; /* add one arg if counting from $0 */ | |
ccc6cda3 JA |
6143 | break; |
6144 | #if defined (ARRAY_VARS) | |
6145 | case VT_ARRAYVAR: | |
301e2142 | 6146 | /* For arrays, the first value deals with array indices. Negative |
09767ff0 CR |
6147 | offsets count from one past the array's maximum index. Associative |
6148 | arrays treat the number of elements as the maximum index. */ | |
6149 | if (assoc_p (v)) | |
6150 | { | |
6151 | h = assoc_cell (v); | |
6152 | len = assoc_num_elements (h) + (*e1p < 0); | |
6153 | } | |
6154 | else | |
6155 | { | |
6156 | a = (ARRAY *)value; | |
6157 | len = array_max_index (a) + (*e1p < 0); /* arrays index from 0 to n - 1 */ | |
6158 | } | |
ccc6cda3 JA |
6159 | break; |
6160 | #endif | |
6161 | } | |
6162 | ||
f73dda09 JA |
6163 | if (len == -1) /* paranoia */ |
6164 | return -1; | |
6165 | ||
ccc6cda3 JA |
6166 | if (*e1p < 0) /* negative offsets count from end */ |
6167 | *e1p += len; | |
6168 | ||
8ed8525c | 6169 | if (*e1p > len || *e1p < 0) |
e8ce775d | 6170 | return (-1); |
d166f048 | 6171 | |
5e13499c CR |
6172 | #if defined (ARRAY_VARS) |
6173 | /* For arrays, the second offset deals with the number of elements. */ | |
6174 | if (vtype == VT_ARRAYVAR) | |
dd4f3dd8 | 6175 | len = assoc_p (v) ? assoc_num_elements (h) : array_num_elements (a); |
5e13499c CR |
6176 | #endif |
6177 | ||
ccc6cda3 JA |
6178 | if (t) |
6179 | { | |
6180 | t++; | |
bb70624e | 6181 | temp2 = savestring (t); |
d3ad40de | 6182 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
bb70624e | 6183 | free (temp2); |
ccc6cda3 | 6184 | t[-1] = ':'; |
d166f048 | 6185 | *e2p = evalexp (temp1, &expok); |
ccc6cda3 | 6186 | free (temp1); |
d166f048 | 6187 | if (expok == 0) |
28ef6c31 | 6188 | return (0); |
348a457e | 6189 | #if 1 |
67362c60 | 6190 | if ((vtype == VT_ARRAYVAR || vtype == VT_POSPARMS) && *e2p < 0) |
348a457e CR |
6191 | #else |
6192 | /* bash-4.3: allow positional parameter length < 0 to count backwards | |
6193 | from end of positional parameters */ | |
6194 | if (vtype == VT_ARRAYVAR && *e2p < 0) | |
6195 | #endif | |
28ef6c31 | 6196 | { |
5e13499c | 6197 | internal_error (_("%s: substring expression < 0"), t); |
ccc6cda3 | 6198 | return (0); |
28ef6c31 | 6199 | } |
5e13499c CR |
6200 | #if defined (ARRAY_VARS) |
6201 | /* In order to deal with sparse arrays, push the intelligence about how | |
6202 | to deal with the number of elements desired down to the array- | |
6203 | specific functions. */ | |
6204 | if (vtype != VT_ARRAYVAR) | |
6205 | #endif | |
6206 | { | |
67362c60 CR |
6207 | if (*e2p < 0) |
6208 | { | |
6209 | *e2p += len; | |
6210 | if (*e2p < 0 || *e2p < *e1p) | |
6211 | { | |
6212 | internal_error (_("%s: substring expression < 0"), t); | |
6213 | return (0); | |
6214 | } | |
6215 | } | |
6216 | else | |
6217 | *e2p += *e1p; /* want E2 chars starting at E1 */ | |
5e13499c CR |
6218 | if (*e2p > len) |
6219 | *e2p = len; | |
6220 | } | |
ccc6cda3 JA |
6221 | } |
6222 | else | |
6223 | *e2p = len; | |
6224 | ||
6225 | return (1); | |
6226 | } | |
6227 | ||
ccc6cda3 | 6228 | /* Return the type of variable specified by VARNAME (simple variable, |
cce855bc | 6229 | positional param, or array variable). Also return the value specified |
7117c2d2 | 6230 | by VARNAME (value of a variable or a reference to an array element). |
5f8cde23 CR |
6231 | QUOTED is the standard description of quoting state, using Q_* defines. |
6232 | FLAGS is currently a set of flags to pass to array_value. If IND is | |
6233 | non-null and not INTMAX_MIN, and FLAGS includes AV_USEIND, IND is | |
6234 | passed to array_value so the array index is not computed again. | |
7117c2d2 JA |
6235 | If this returns VT_VARIABLE, the caller assumes that CTLESC and CTLNUL |
6236 | characters in the value are quoted with CTLESC and takes appropriate | |
6237 | steps. For convenience, *VALP is set to the dequoted VALUE. */ | |
ccc6cda3 | 6238 | static int |
5f8cde23 | 6239 | get_var_and_type (varname, value, ind, quoted, flags, varp, valp) |
ccc6cda3 | 6240 | char *varname, *value; |
5f8cde23 CR |
6241 | arrayind_t ind; |
6242 | int quoted, flags; | |
ccc6cda3 JA |
6243 | SHELL_VAR **varp; |
6244 | char **valp; | |
6245 | { | |
6246 | int vtype; | |
6247 | char *temp; | |
6248 | #if defined (ARRAY_VARS) | |
6249 | SHELL_VAR *v; | |
6250 | #endif | |
5f8cde23 | 6251 | arrayind_t lind; |
ccc6cda3 | 6252 | |
7117c2d2 JA |
6253 | /* This sets vtype to VT_VARIABLE or VT_POSPARMS */ |
6254 | vtype = (varname[0] == '@' || varname[0] == '*') && varname[1] == '\0'; | |
d3a24ed2 CR |
6255 | if (vtype == VT_POSPARMS && varname[0] == '*') |
6256 | vtype |= VT_STARSUB; | |
ccc6cda3 JA |
6257 | *varp = (SHELL_VAR *)NULL; |
6258 | ||
6259 | #if defined (ARRAY_VARS) | |
6260 | if (valid_array_reference (varname)) | |
6261 | { | |
6262 | v = array_variable_part (varname, &temp, (int *)0); | |
5f8cde23 CR |
6263 | /* If we want to signal array_value to use an already-computed index, |
6264 | set LIND to that index */ | |
6265 | lind = (ind != INTMAX_MIN && (flags & AV_USEIND)) ? ind : 0; | |
fdf670ea | 6266 | if (v && (array_p (v) || assoc_p (v))) |
f73dda09 JA |
6267 | { /* [ */ |
6268 | if (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']') | |
ccc6cda3 | 6269 | { |
dd4f3dd8 | 6270 | /* Callers have to differentiate betwen indexed and associative */ |
ccc6cda3 | 6271 | vtype = VT_ARRAYVAR; |
d3a24ed2 CR |
6272 | if (temp[0] == '*') |
6273 | vtype |= VT_STARSUB; | |
fdf670ea | 6274 | *valp = array_p (v) ? (char *)array_cell (v) : (char *)assoc_cell (v); |
ccc6cda3 JA |
6275 | } |
6276 | else | |
6277 | { | |
d166f048 | 6278 | vtype = VT_ARRAYMEMBER; |
5f8cde23 | 6279 | *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind); |
ccc6cda3 JA |
6280 | } |
6281 | *varp = v; | |
6282 | } | |
8fed3589 CR |
6283 | else if (v && (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']')) |
6284 | { | |
6285 | vtype = VT_VARIABLE; | |
6286 | *varp = v; | |
6287 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6288 | *valp = dequote_string (value); | |
6289 | else | |
6290 | *valp = dequote_escapes (value); | |
6291 | } | |
ccc6cda3 | 6292 | else |
fdf670ea CR |
6293 | { |
6294 | vtype = VT_ARRAYMEMBER; | |
6295 | *varp = v; | |
5f8cde23 | 6296 | *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind); |
fdf670ea | 6297 | } |
ccc6cda3 | 6298 | } |
fdf670ea | 6299 | else if ((v = find_variable (varname)) && (invisible_p (v) == 0) && (assoc_p (v) || array_p (v))) |
ccc6cda3 | 6300 | { |
7117c2d2 | 6301 | vtype = VT_ARRAYMEMBER; |
ccc6cda3 | 6302 | *varp = v; |
fdf670ea | 6303 | *valp = assoc_p (v) ? assoc_reference (assoc_cell (v), "0") : array_reference (array_cell (v), 0); |
ccc6cda3 JA |
6304 | } |
6305 | else | |
6306 | #endif | |
762a763b CR |
6307 | { |
6308 | if (value && vtype == VT_VARIABLE) | |
6309 | { | |
6310 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6311 | *valp = dequote_string (value); | |
6312 | else | |
6313 | *valp = dequote_escapes (value); | |
6314 | } | |
6315 | else | |
6316 | *valp = value; | |
6317 | } | |
ccc6cda3 JA |
6318 | |
6319 | return vtype; | |
6320 | } | |
6321 | ||
cce855bc JA |
6322 | /******************************************************/ |
6323 | /* */ | |
6324 | /* Functions to extract substrings of variable values */ | |
6325 | /* */ | |
6326 | /******************************************************/ | |
6327 | ||
545f34cf CR |
6328 | #if defined (HANDLE_MULTIBYTE) |
6329 | /* Character-oriented rather than strictly byte-oriented substrings. S and | |
6330 | E, rather being strict indices into STRING, indicate character (possibly | |
6331 | multibyte character) positions that require calculation. | |
6332 | Used by the ${param:offset[:length]} expansion. */ | |
6333 | static char * | |
6334 | mb_substring (string, s, e) | |
6335 | char *string; | |
6336 | int s, e; | |
6337 | { | |
6338 | char *tt; | |
6339 | int start, stop, i, slen; | |
6340 | DECLARE_MBSTATE; | |
6341 | ||
6342 | start = 0; | |
da713c23 CR |
6343 | /* Don't need string length in ADVANCE_CHAR unless multibyte chars possible. */ |
6344 | slen = (MB_CUR_MAX > 1) ? STRLEN (string) : 0; | |
545f34cf CR |
6345 | |
6346 | i = s; | |
6347 | while (string[start] && i--) | |
6348 | ADVANCE_CHAR (string, slen, start); | |
6349 | stop = start; | |
6350 | i = e - s; | |
6351 | while (string[stop] && i--) | |
6352 | ADVANCE_CHAR (string, slen, stop); | |
6353 | tt = substring (string, start, stop); | |
6354 | return tt; | |
6355 | } | |
6356 | #endif | |
6357 | ||
ccc6cda3 JA |
6358 | /* Process a variable substring expansion: ${name:e1[:e2]}. If VARNAME |
6359 | is `@', use the positional parameters; otherwise, use the value of | |
6360 | VARNAME. If VARNAME is an array variable, use the array elements. */ | |
6361 | ||
6362 | static char * | |
5f8cde23 CR |
6363 | parameter_brace_substring (varname, value, ind, substr, quoted, flags) |
6364 | char *varname, *value; | |
6365 | int ind; | |
6366 | char *substr; | |
6367 | int quoted, flags; | |
ccc6cda3 | 6368 | { |
7117c2d2 | 6369 | intmax_t e1, e2; |
d3a24ed2 | 6370 | int vtype, r, starsub; |
d3ad40de | 6371 | char *temp, *val, *tt, *oname; |
ccc6cda3 JA |
6372 | SHELL_VAR *v; |
6373 | ||
6374 | if (value == 0) | |
6375 | return ((char *)NULL); | |
6376 | ||
d3ad40de | 6377 | oname = this_command_name; |
ccc6cda3 JA |
6378 | this_command_name = varname; |
6379 | ||
5f8cde23 | 6380 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
ccc6cda3 | 6381 | if (vtype == -1) |
d3ad40de CR |
6382 | { |
6383 | this_command_name = oname; | |
6384 | return ((char *)NULL); | |
6385 | } | |
ccc6cda3 | 6386 | |
d3a24ed2 CR |
6387 | starsub = vtype & VT_STARSUB; |
6388 | vtype &= ~VT_STARSUB; | |
6389 | ||
09767ff0 | 6390 | r = verify_substring_values (v, val, substr, vtype, &e1, &e2); |
d3ad40de | 6391 | this_command_name = oname; |
e8ce775d | 6392 | if (r <= 0) |
631b20c6 CR |
6393 | { |
6394 | if (vtype == VT_VARIABLE) | |
6395 | FREE (val); | |
6396 | return ((r == 0) ? &expand_param_error : (char *)NULL); | |
6397 | } | |
ccc6cda3 JA |
6398 | |
6399 | switch (vtype) | |
6400 | { | |
6401 | case VT_VARIABLE: | |
d166f048 | 6402 | case VT_ARRAYMEMBER: |
545f34cf CR |
6403 | #if defined (HANDLE_MULTIBYTE) |
6404 | if (MB_CUR_MAX > 1) | |
6405 | tt = mb_substring (val, e1, e2); | |
6406 | else | |
6407 | #endif | |
7117c2d2 | 6408 | tt = substring (val, e1, e2); |
545f34cf | 6409 | |
7117c2d2 JA |
6410 | if (vtype == VT_VARIABLE) |
6411 | FREE (val); | |
6412 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6413 | temp = quote_string (tt); | |
6414 | else | |
6415 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6416 | FREE (tt); | |
ccc6cda3 JA |
6417 | break; |
6418 | case VT_POSPARMS: | |
7117c2d2 JA |
6419 | tt = pos_params (varname, e1, e2, quoted); |
6420 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) | |
6421 | { | |
6422 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6423 | FREE (tt); | |
6424 | } | |
6425 | else | |
6426 | temp = tt; | |
ccc6cda3 JA |
6427 | break; |
6428 | #if defined (ARRAY_VARS) | |
6429 | case VT_ARRAYVAR: | |
fdf670ea | 6430 | if (assoc_p (v)) |
09767ff0 CR |
6431 | /* we convert to list and take first e2 elements starting at e1th |
6432 | element -- officially undefined for now */ | |
6433 | temp = assoc_subrange (assoc_cell (v), e1, e2, starsub, quoted); | |
fdf670ea | 6434 | else |
5e13499c | 6435 | /* We want E2 to be the number of elements desired (arrays can be sparse, |
704a1a2a CR |
6436 | so verify_substring_values just returns the numbers specified and we |
6437 | rely on array_subrange to understand how to deal with them). */ | |
fdf670ea | 6438 | temp = array_subrange (array_cell (v), e1, e2, starsub, quoted); |
d3ad40de CR |
6439 | /* array_subrange now calls array_quote_escapes as appropriate, so the |
6440 | caller no longer needs to. */ | |
ccc6cda3 JA |
6441 | break; |
6442 | #endif | |
f73dda09 JA |
6443 | default: |
6444 | temp = (char *)NULL; | |
ccc6cda3 JA |
6445 | } |
6446 | ||
6447 | return temp; | |
6448 | } | |
6449 | ||
cce855bc JA |
6450 | /****************************************************************/ |
6451 | /* */ | |
6452 | /* Functions to perform pattern substitution on variable values */ | |
6453 | /* */ | |
6454 | /****************************************************************/ | |
6455 | ||
ee56a865 CR |
6456 | static int |
6457 | shouldexp_replacement (s) | |
6458 | char *s; | |
6459 | { | |
6460 | register char *p; | |
6461 | ||
6462 | for (p = s; p && *p; p++) | |
6463 | { | |
6464 | if (*p == '\\') | |
6465 | p++; | |
6466 | else if (*p == '&') | |
6467 | return 1; | |
6468 | } | |
6469 | return 0; | |
6470 | } | |
6471 | ||
ccc6cda3 JA |
6472 | char * |
6473 | pat_subst (string, pat, rep, mflags) | |
6474 | char *string, *pat, *rep; | |
6475 | int mflags; | |
6476 | { | |
ee56a865 CR |
6477 | char *ret, *s, *e, *str, *rstr, *mstr; |
6478 | int rsize, rptr, l, replen, mtype, rxpand, rslen, mlen; | |
ccc6cda3 | 6479 | |
5f8cde23 CR |
6480 | if (string == 0) |
6481 | return (savestring ("")); | |
6482 | ||
b72432fd JA |
6483 | mtype = mflags & MATCH_TYPEMASK; |
6484 | ||
e054386f | 6485 | #if 0 /* bash-4.2 ? */ |
ee56a865 | 6486 | rxpand = (rep && *rep) ? shouldexp_replacement (rep) : 0; |
e054386f CR |
6487 | #else |
6488 | rxpand = 0; | |
6489 | #endif | |
ee56a865 | 6490 | |
b72432fd JA |
6491 | /* Special cases: |
6492 | * 1. A null pattern with mtype == MATCH_BEG means to prefix STRING | |
6493 | * with REP and return the result. | |
6494 | * 2. A null pattern with mtype == MATCH_END means to append REP to | |
6495 | * STRING and return the result. | |
ee56a865 | 6496 | * These don't understand or process `&' in the replacement string. |
b72432fd JA |
6497 | */ |
6498 | if ((pat == 0 || *pat == 0) && (mtype == MATCH_BEG || mtype == MATCH_END)) | |
6499 | { | |
6500 | replen = STRLEN (rep); | |
5f8cde23 | 6501 | l = STRLEN (string); |
f73dda09 | 6502 | ret = (char *)xmalloc (replen + l + 2); |
bb70624e JA |
6503 | if (replen == 0) |
6504 | strcpy (ret, string); | |
6505 | else if (mtype == MATCH_BEG) | |
b72432fd JA |
6506 | { |
6507 | strcpy (ret, rep); | |
6508 | strcpy (ret + replen, string); | |
6509 | } | |
6510 | else | |
6511 | { | |
6512 | strcpy (ret, string); | |
6513 | strcpy (ret + l, rep); | |
6514 | } | |
6515 | return (ret); | |
6516 | } | |
6517 | ||
f73dda09 | 6518 | ret = (char *)xmalloc (rsize = 64); |
ccc6cda3 JA |
6519 | ret[0] = '\0'; |
6520 | ||
ccc6cda3 JA |
6521 | for (replen = STRLEN (rep), rptr = 0, str = string;;) |
6522 | { | |
6523 | if (match_pattern (str, pat, mtype, &s, &e) == 0) | |
6524 | break; | |
6525 | l = s - str; | |
ee56a865 CR |
6526 | |
6527 | if (rxpand) | |
6528 | { | |
6529 | int x; | |
6530 | mlen = e - s; | |
6531 | mstr = xmalloc (mlen + 1); | |
6532 | for (x = 0; x < mlen; x++) | |
6533 | mstr[x] = s[x]; | |
6534 | mstr[mlen] = '\0'; | |
6535 | rstr = strcreplace (rep, '&', mstr, 0); | |
6536 | rslen = strlen (rstr); | |
6537 | } | |
6538 | else | |
6539 | { | |
6540 | rstr = rep; | |
6541 | rslen = replen; | |
6542 | } | |
6543 | ||
6544 | RESIZE_MALLOCED_BUFFER (ret, rptr, (l + rslen), rsize, 64); | |
ccc6cda3 JA |
6545 | |
6546 | /* OK, now copy the leading unmatched portion of the string (from | |
6547 | str to s) to ret starting at rptr (the current offset). Then copy | |
28ef6c31 JA |
6548 | the replacement string at ret + rptr + (s - str). Increment |
6549 | rptr (if necessary) and str and go on. */ | |
ccc6cda3 JA |
6550 | if (l) |
6551 | { | |
6552 | strncpy (ret + rptr, str, l); | |
6553 | rptr += l; | |
6554 | } | |
6555 | if (replen) | |
6556 | { | |
ee56a865 CR |
6557 | strncpy (ret + rptr, rstr, rslen); |
6558 | rptr += rslen; | |
ccc6cda3 JA |
6559 | } |
6560 | str = e; /* e == end of match */ | |
d3a24ed2 | 6561 | |
ee56a865 CR |
6562 | if (rstr != rep) |
6563 | free (rstr); | |
6564 | ||
ccc6cda3 | 6565 | if (((mflags & MATCH_GLOBREP) == 0) || mtype != MATCH_ANY) |
28ef6c31 | 6566 | break; |
d3a24ed2 CR |
6567 | |
6568 | if (s == e) | |
5ccad779 CR |
6569 | { |
6570 | /* On a zero-length match, make sure we copy one character, since | |
6571 | we increment one character to avoid infinite recursion. */ | |
6572 | RESIZE_MALLOCED_BUFFER (ret, rptr, 1, rsize, 64); | |
6573 | ret[rptr++] = *str++; | |
6574 | e++; /* avoid infinite recursion on zero-length match */ | |
6575 | } | |
ccc6cda3 JA |
6576 | } |
6577 | ||
6578 | /* Now copy the unmatched portion of the input string */ | |
5f8cde23 | 6579 | if (str && *str) |
d166f048 JA |
6580 | { |
6581 | RESIZE_MALLOCED_BUFFER (ret, rptr, STRLEN(str) + 1, rsize, 64); | |
6582 | strcpy (ret + rptr, str); | |
6583 | } | |
ccc6cda3 JA |
6584 | else |
6585 | ret[rptr] = '\0'; | |
6586 | ||
6587 | return ret; | |
6588 | } | |
6589 | ||
6590 | /* Do pattern match and replacement on the positional parameters. */ | |
6591 | static char * | |
6592 | pos_params_pat_subst (string, pat, rep, mflags) | |
6593 | char *string, *pat, *rep; | |
6594 | int mflags; | |
6595 | { | |
6596 | WORD_LIST *save, *params; | |
6597 | WORD_DESC *w; | |
d3ad40de | 6598 | char *ret; |
e33f2203 | 6599 | int pchar, qflags; |
ccc6cda3 JA |
6600 | |
6601 | save = params = list_rest_of_args (); | |
6602 | if (save == 0) | |
6603 | return ((char *)NULL); | |
6604 | ||
6605 | for ( ; params; params = params->next) | |
6606 | { | |
6607 | ret = pat_subst (params->word->word, pat, rep, mflags); | |
227f982e CR |
6608 | w = alloc_word_desc (); |
6609 | w->word = ret ? ret : savestring (""); | |
ccc6cda3 JA |
6610 | dispose_word (params->word); |
6611 | params->word = w; | |
ccc6cda3 JA |
6612 | } |
6613 | ||
e33f2203 CR |
6614 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; |
6615 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6616 | ||
e33f2203 | 6617 | ret = string_list_pos_params (pchar, save, qflags); |
e33f2203 | 6618 | |
ccc6cda3 JA |
6619 | dispose_words (save); |
6620 | ||
6621 | return (ret); | |
6622 | } | |
6623 | ||
cce855bc JA |
6624 | /* Perform pattern substitution on VALUE, which is the expansion of |
6625 | VARNAME. PATSUB is an expression supplying the pattern to match | |
6626 | and the string to substitute. QUOTED is a flags word containing | |
6627 | the type of quoting currently in effect. */ | |
ccc6cda3 | 6628 | static char * |
5f8cde23 CR |
6629 | parameter_brace_patsub (varname, value, ind, patsub, quoted, flags) |
6630 | char *varname, *value; | |
6631 | int ind; | |
6632 | char *patsub; | |
6633 | int quoted, flags; | |
ccc6cda3 | 6634 | { |
c2a47ea9 | 6635 | int vtype, mflags, starsub, delim; |
7117c2d2 | 6636 | char *val, *temp, *pat, *rep, *p, *lpatsub, *tt; |
ccc6cda3 JA |
6637 | SHELL_VAR *v; |
6638 | ||
6639 | if (value == 0) | |
6640 | return ((char *)NULL); | |
6641 | ||
6642 | this_command_name = varname; | |
6643 | ||
5f8cde23 | 6644 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
ccc6cda3 JA |
6645 | if (vtype == -1) |
6646 | return ((char *)NULL); | |
6647 | ||
d3a24ed2 CR |
6648 | starsub = vtype & VT_STARSUB; |
6649 | vtype &= ~VT_STARSUB; | |
6650 | ||
ccc6cda3 | 6651 | mflags = 0; |
77638cbf CR |
6652 | /* PATSUB is never NULL when this is called. */ |
6653 | if (*patsub == '/') | |
d3ad40de CR |
6654 | { |
6655 | mflags |= MATCH_GLOBREP; | |
6656 | patsub++; | |
6657 | } | |
7117c2d2 JA |
6658 | |
6659 | /* Malloc this because expand_string_if_necessary or one of the expansion | |
6660 | functions in its call chain may free it on a substitution error. */ | |
bb70624e | 6661 | lpatsub = savestring (patsub); |
ccc6cda3 JA |
6662 | |
6663 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6664 | mflags |= MATCH_QUOTED; | |
6665 | ||
d3a24ed2 CR |
6666 | if (starsub) |
6667 | mflags |= MATCH_STARSUB; | |
6668 | ||
dc8fbaf9 CR |
6669 | /* If the pattern starts with a `/', make sure we skip over it when looking |
6670 | for the replacement delimiter. */ | |
4d8d005b | 6671 | delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0); |
c2a47ea9 CR |
6672 | if (lpatsub[delim] == '/') |
6673 | { | |
6674 | lpatsub[delim] = 0; | |
6675 | rep = lpatsub + delim + 1; | |
6676 | } | |
6677 | else | |
6678 | rep = (char *)NULL; | |
ccc6cda3 JA |
6679 | |
6680 | if (rep && *rep == '\0') | |
6681 | rep = (char *)NULL; | |
6682 | ||
5e13499c CR |
6683 | /* Perform the same expansions on the pattern as performed by the |
6684 | pattern removal expansions. */ | |
6685 | pat = getpattern (lpatsub, quoted, 1); | |
bb70624e | 6686 | |
ccc6cda3 | 6687 | if (rep) |
7175a77f CR |
6688 | { |
6689 | /* We want to perform quote removal on the expanded replacement even if | |
6690 | the entire expansion is double-quoted because the parser and string | |
6691 | extraction functions treated quotes in the replacement string as | |
6692 | special. THIS IS NOT BACKWARDS COMPATIBLE WITH BASH-4.2. */ | |
6693 | if (shell_compatibility_level > 42) | |
6694 | rep = expand_string_if_necessary (rep, quoted & ~(Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT), expand_string_unsplit); | |
6695 | /* This is the bash-4.2 code. */ | |
6696 | else if ((mflags & MATCH_QUOTED) == 0) | |
6697 | rep = expand_string_if_necessary (rep, quoted, expand_string_unsplit); | |
6698 | else | |
6699 | rep = expand_string_to_string_internal (rep, quoted, expand_string_unsplit); | |
6700 | } | |
ccc6cda3 | 6701 | |
dc8fbaf9 | 6702 | /* ksh93 doesn't allow the match specifier to be a part of the expanded |
d3ad40de CR |
6703 | pattern. This is an extension. Make sure we don't anchor the pattern |
6704 | at the beginning or end of the string if we're doing global replacement, | |
6705 | though. */ | |
ccc6cda3 | 6706 | p = pat; |
d3ad40de CR |
6707 | if (mflags & MATCH_GLOBREP) |
6708 | mflags |= MATCH_ANY; | |
dc8fbaf9 | 6709 | else if (pat && pat[0] == '#') |
ccc6cda3 JA |
6710 | { |
6711 | mflags |= MATCH_BEG; | |
6712 | p++; | |
6713 | } | |
d166f048 | 6714 | else if (pat && pat[0] == '%') |
ccc6cda3 JA |
6715 | { |
6716 | mflags |= MATCH_END; | |
6717 | p++; | |
6718 | } | |
6719 | else | |
6720 | mflags |= MATCH_ANY; | |
6721 | ||
cce855bc JA |
6722 | /* OK, we now want to substitute REP for PAT in VAL. If |
6723 | flags & MATCH_GLOBREP is non-zero, the substitution is done | |
6724 | everywhere, otherwise only the first occurrence of PAT is | |
7117c2d2 JA |
6725 | replaced. The pattern matching code doesn't understand |
6726 | CTLESC quoting CTLESC and CTLNUL so we use the dequoted variable | |
6727 | values passed in (VT_VARIABLE) so the pattern substitution | |
6728 | code works right. We need to requote special chars after | |
6729 | we're done for VT_VARIABLE and VT_ARRAYMEMBER, and for the | |
6730 | other cases if QUOTED == 0, since the posparams and arrays | |
6731 | indexed by * or @ do special things when QUOTED != 0. */ | |
6732 | ||
ccc6cda3 JA |
6733 | switch (vtype) |
6734 | { | |
6735 | case VT_VARIABLE: | |
d166f048 | 6736 | case VT_ARRAYMEMBER: |
ccc6cda3 | 6737 | temp = pat_subst (val, p, rep, mflags); |
7117c2d2 JA |
6738 | if (vtype == VT_VARIABLE) |
6739 | FREE (val); | |
6740 | if (temp) | |
6741 | { | |
e6598ba4 | 6742 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); |
7117c2d2 JA |
6743 | free (temp); |
6744 | temp = tt; | |
6745 | } | |
ccc6cda3 JA |
6746 | break; |
6747 | case VT_POSPARMS: | |
6748 | temp = pos_params_pat_subst (val, p, rep, mflags); | |
7117c2d2 JA |
6749 | if (temp && (mflags & MATCH_QUOTED) == 0) |
6750 | { | |
6751 | tt = quote_escapes (temp); | |
6752 | free (temp); | |
6753 | temp = tt; | |
6754 | } | |
ccc6cda3 JA |
6755 | break; |
6756 | #if defined (ARRAY_VARS) | |
6757 | case VT_ARRAYVAR: | |
fdf670ea CR |
6758 | temp = assoc_p (v) ? assoc_patsub (assoc_cell (v), p, rep, mflags) |
6759 | : array_patsub (array_cell (v), p, rep, mflags); | |
e6598ba4 CR |
6760 | /* Don't call quote_escapes anymore; array_patsub calls |
6761 | array_quote_escapes as appropriate before adding the | |
fdf670ea | 6762 | space separators; ditto for assoc_patsub. */ |
ccc6cda3 JA |
6763 | break; |
6764 | #endif | |
6765 | } | |
6766 | ||
6767 | FREE (pat); | |
6768 | FREE (rep); | |
bb70624e | 6769 | free (lpatsub); |
ccc6cda3 JA |
6770 | |
6771 | return temp; | |
6772 | } | |
6773 | ||
09767ff0 CR |
6774 | /****************************************************************/ |
6775 | /* */ | |
6776 | /* Functions to perform case modification on variable values */ | |
6777 | /* */ | |
6778 | /****************************************************************/ | |
6779 | ||
6780 | /* Do case modification on the positional parameters. */ | |
6781 | ||
6782 | static char * | |
6783 | pos_params_modcase (string, pat, modop, mflags) | |
6784 | char *string, *pat; | |
6785 | int modop; | |
6786 | int mflags; | |
6787 | { | |
6788 | WORD_LIST *save, *params; | |
6789 | WORD_DESC *w; | |
6790 | char *ret; | |
6791 | int pchar, qflags; | |
6792 | ||
6793 | save = params = list_rest_of_args (); | |
6794 | if (save == 0) | |
6795 | return ((char *)NULL); | |
6796 | ||
6797 | for ( ; params; params = params->next) | |
6798 | { | |
6799 | ret = sh_modcase (params->word->word, pat, modop); | |
6800 | w = alloc_word_desc (); | |
6801 | w->word = ret ? ret : savestring (""); | |
6802 | dispose_word (params->word); | |
6803 | params->word = w; | |
6804 | } | |
6805 | ||
6806 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; | |
6807 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6808 | ||
6809 | ret = string_list_pos_params (pchar, save, qflags); | |
6810 | dispose_words (save); | |
6811 | ||
6812 | return (ret); | |
6813 | } | |
6814 | ||
6815 | /* Perform case modification on VALUE, which is the expansion of | |
6816 | VARNAME. MODSPEC is an expression supplying the type of modification | |
6817 | to perform. QUOTED is a flags word containing the type of quoting | |
6818 | currently in effect. */ | |
6819 | static char * | |
5f8cde23 | 6820 | parameter_brace_casemod (varname, value, ind, modspec, patspec, quoted, flags) |
09767ff0 | 6821 | char *varname, *value; |
5f8cde23 | 6822 | int ind, modspec; |
09767ff0 | 6823 | char *patspec; |
5f8cde23 | 6824 | int quoted, flags; |
09767ff0 CR |
6825 | { |
6826 | int vtype, starsub, modop, mflags, x; | |
6827 | char *val, *temp, *pat, *p, *lpat, *tt; | |
6828 | SHELL_VAR *v; | |
6829 | ||
6830 | if (value == 0) | |
6831 | return ((char *)NULL); | |
6832 | ||
6833 | this_command_name = varname; | |
6834 | ||
5f8cde23 | 6835 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
09767ff0 CR |
6836 | if (vtype == -1) |
6837 | return ((char *)NULL); | |
6838 | ||
6839 | starsub = vtype & VT_STARSUB; | |
6840 | vtype &= ~VT_STARSUB; | |
6841 | ||
6842 | modop = 0; | |
6843 | mflags = 0; | |
6844 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6845 | mflags |= MATCH_QUOTED; | |
6846 | if (starsub) | |
6847 | mflags |= MATCH_STARSUB; | |
6848 | ||
6849 | p = patspec; | |
6850 | if (modspec == '^') | |
6851 | { | |
6852 | x = p && p[0] == modspec; | |
e141c35a | 6853 | modop = x ? CASE_UPPER : CASE_UPFIRST; |
09767ff0 CR |
6854 | p += x; |
6855 | } | |
6856 | else if (modspec == ',') | |
6857 | { | |
6858 | x = p && p[0] == modspec; | |
e141c35a | 6859 | modop = x ? CASE_LOWER : CASE_LOWFIRST; |
09767ff0 CR |
6860 | p += x; |
6861 | } | |
6862 | else if (modspec == '~') | |
6863 | { | |
6864 | x = p && p[0] == modspec; | |
6865 | modop = x ? CASE_TOGGLEALL : CASE_TOGGLE; | |
6866 | p += x; | |
6867 | } | |
6868 | ||
6869 | lpat = p ? savestring (p) : 0; | |
6870 | /* Perform the same expansions on the pattern as performed by the | |
6871 | pattern removal expansions. FOR LATER */ | |
6872 | pat = lpat ? getpattern (lpat, quoted, 1) : 0; | |
6873 | ||
6874 | /* OK, now we do the case modification. */ | |
6875 | switch (vtype) | |
6876 | { | |
6877 | case VT_VARIABLE: | |
6878 | case VT_ARRAYMEMBER: | |
6879 | temp = sh_modcase (val, pat, modop); | |
6880 | if (vtype == VT_VARIABLE) | |
6881 | FREE (val); | |
6882 | if (temp) | |
6883 | { | |
6884 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); | |
6885 | free (temp); | |
6886 | temp = tt; | |
6887 | } | |
6888 | break; | |
6889 | ||
6890 | case VT_POSPARMS: | |
6891 | temp = pos_params_modcase (val, pat, modop, mflags); | |
6892 | if (temp && (mflags & MATCH_QUOTED) == 0) | |
6893 | { | |
6894 | tt = quote_escapes (temp); | |
6895 | free (temp); | |
6896 | temp = tt; | |
6897 | } | |
6898 | break; | |
6899 | ||
6900 | #if defined (ARRAY_VARS) | |
6901 | case VT_ARRAYVAR: | |
6902 | temp = assoc_p (v) ? assoc_modcase (assoc_cell (v), pat, modop, mflags) | |
6903 | : array_modcase (array_cell (v), pat, modop, mflags); | |
6904 | /* Don't call quote_escapes; array_modcase calls array_quote_escapes | |
6905 | as appropriate before adding the space separators; ditto for | |
6906 | assoc_modcase. */ | |
6907 | break; | |
6908 | #endif | |
6909 | } | |
6910 | ||
6911 | FREE (pat); | |
6912 | free (lpat); | |
6913 | ||
6914 | return temp; | |
6915 | } | |
6916 | ||
d3ad40de CR |
6917 | /* Check for unbalanced parens in S, which is the contents of $(( ... )). If |
6918 | any occur, this must be a nested command substitution, so return 0. | |
6919 | Otherwise, return 1. A valid arithmetic expression must always have a | |
6920 | ( before a matching ), so any cases where there are more right parens | |
6921 | means that this must not be an arithmetic expression, though the parser | |
6922 | will not accept it without a balanced total number of parens. */ | |
6923 | static int | |
6924 | chk_arithsub (s, len) | |
6925 | const char *s; | |
6926 | int len; | |
6927 | { | |
6928 | int i, count; | |
6929 | DECLARE_MBSTATE; | |
6930 | ||
6931 | i = count = 0; | |
6932 | while (i < len) | |
6933 | { | |
176b12ee | 6934 | if (s[i] == LPAREN) |
d3ad40de | 6935 | count++; |
176b12ee | 6936 | else if (s[i] == RPAREN) |
d3ad40de CR |
6937 | { |
6938 | count--; | |
6939 | if (count < 0) | |
6940 | return 0; | |
6941 | } | |
6942 | ||
6943 | switch (s[i]) | |
6944 | { | |
6945 | default: | |
6946 | ADVANCE_CHAR (s, len, i); | |
6947 | break; | |
6948 | ||
6949 | case '\\': | |
6950 | i++; | |
6951 | if (s[i]) | |
6952 | ADVANCE_CHAR (s, len, i); | |
6953 | break; | |
6954 | ||
6955 | case '\'': | |
6956 | i = skip_single_quoted (s, len, ++i); | |
6957 | break; | |
6958 | ||
6959 | case '"': | |
6960 | i = skip_double_quoted ((char *)s, len, ++i); | |
6961 | break; | |
6962 | } | |
6963 | } | |
6964 | ||
6965 | return (count == 0); | |
6966 | } | |
6967 | ||
cce855bc JA |
6968 | /****************************************************************/ |
6969 | /* */ | |
6970 | /* Functions to perform parameter expansion on a string */ | |
6971 | /* */ | |
6972 | /****************************************************************/ | |
6973 | ||
09767ff0 | 6974 | /* ${[#][!]name[[:][^[^]][,[,]]#[#]%[%]-=?+[word][:e1[:e2]]]} */ |
227f982e | 6975 | static WORD_DESC * |
e1e48bba | 6976 | parameter_brace_expand (string, indexp, quoted, pflags, quoted_dollar_atp, contains_dollar_at) |
ccc6cda3 | 6977 | char *string; |
e1e48bba | 6978 | int *indexp, quoted, *quoted_dollar_atp, *contains_dollar_at, pflags; |
ccc6cda3 JA |
6979 | { |
6980 | int check_nullness, var_is_set, var_is_null, var_is_special; | |
09767ff0 | 6981 | int want_substring, want_indir, want_patsub, want_casemod; |
ccc6cda3 | 6982 | char *name, *value, *temp, *temp1; |
227f982e | 6983 | WORD_DESC *tdesc, *ret; |
09767ff0 | 6984 | int t_index, sindex, c, tflag, modspec; |
7117c2d2 | 6985 | intmax_t number; |
5f8cde23 | 6986 | arrayind_t ind; |
ccc6cda3 | 6987 | |
c40a57dd | 6988 | temp = temp1 = value = (char *)NULL; |
ccc6cda3 | 6989 | var_is_set = var_is_null = var_is_special = check_nullness = 0; |
09767ff0 | 6990 | want_substring = want_indir = want_patsub = want_casemod = 0; |
ccc6cda3 | 6991 | |
cce855bc JA |
6992 | sindex = *indexp; |
6993 | t_index = ++sindex; | |
11a6f9a9 CR |
6994 | /* ${#var} doesn't have any of the other parameter expansions on it. */ |
6995 | if (string[t_index] == '#' && legal_variable_starter (string[t_index+1])) /* {{ */ | |
e6598ba4 | 6996 | name = string_extract (string, &t_index, "}", SX_VARNAME); |
11a6f9a9 | 6997 | else |
09767ff0 CR |
6998 | #if defined (CASEMOD_EXPANSIONS) |
6999 | /* To enable case-toggling expansions using the `~' operator character | |
7000 | change the 1 to 0. */ | |
7001 | # if defined (CASEMOD_CAPCASE) | |
7002 | name = string_extract (string, &t_index, "#%^,~:-=?+/}", SX_VARNAME); | |
7003 | # else | |
7004 | name = string_extract (string, &t_index, "#%^,:-=?+/}", SX_VARNAME); | |
7005 | # endif /* CASEMOD_CAPCASE */ | |
7006 | #else | |
e6598ba4 | 7007 | name = string_extract (string, &t_index, "#%:-=?+/}", SX_VARNAME); |
09767ff0 | 7008 | #endif /* CASEMOD_EXPANSIONS */ |
cce855bc | 7009 | |
227f982e CR |
7010 | ret = 0; |
7011 | tflag = 0; | |
7012 | ||
5f8cde23 CR |
7013 | ind = INTMAX_MIN; |
7014 | ||
cce855bc JA |
7015 | /* If the name really consists of a special variable, then make sure |
7016 | that we have the entire name. We don't allow indirect references | |
7017 | to special variables except `#', `?', `@' and `*'. */ | |
e05be32d CR |
7018 | if ((sindex == t_index && VALID_SPECIAL_LENGTH_PARAM (string[t_index])) || |
7019 | (sindex == t_index - 1 && string[sindex] == '!' && VALID_INDIR_PARAM (string[t_index]))) | |
ccc6cda3 JA |
7020 | { |
7021 | t_index++; | |
ccc6cda3 | 7022 | temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0); |
631b20c6 | 7023 | name = (char *)xrealloc (name, 3 + (strlen (temp1))); |
ccc6cda3 JA |
7024 | *name = string[sindex]; |
7025 | if (string[sindex] == '!') | |
7026 | { | |
28ef6c31 JA |
7027 | /* indirect reference of $#, $?, $@, or $* */ |
7028 | name[1] = string[sindex + 1]; | |
7029 | strcpy (name + 2, temp1); | |
ccc6cda3 | 7030 | } |
cce855bc | 7031 | else |
ccc6cda3 JA |
7032 | strcpy (name + 1, temp1); |
7033 | free (temp1); | |
7034 | } | |
7035 | sindex = t_index; | |
7036 | ||
7037 | /* Find out what character ended the variable name. Then | |
7038 | do the appropriate thing. */ | |
7039 | if (c = string[sindex]) | |
7040 | sindex++; | |
7041 | ||
7042 | /* If c is followed by one of the valid parameter expansion | |
7043 | characters, move past it as normal. If not, assume that | |
7044 | a substring specification is being given, and do not move | |
7045 | past it. */ | |
28ef6c31 | 7046 | if (c == ':' && VALID_PARAM_EXPAND_CHAR (string[sindex])) |
ccc6cda3 JA |
7047 | { |
7048 | check_nullness++; | |
7049 | if (c = string[sindex]) | |
7050 | sindex++; | |
7051 | } | |
cce855bc | 7052 | else if (c == ':' && string[sindex] != RBRACE) |
ccc6cda3 | 7053 | want_substring = 1; |
77638cbf | 7054 | else if (c == '/' /* && string[sindex] != RBRACE */) /* XXX */ |
ccc6cda3 | 7055 | want_patsub = 1; |
09767ff0 CR |
7056 | #if defined (CASEMOD_EXPANSIONS) |
7057 | else if (c == '^' || c == ',' || c == '~') | |
7058 | { | |
7059 | modspec = c; | |
7060 | want_casemod = 1; | |
7061 | } | |
7062 | #endif | |
ccc6cda3 | 7063 | |
cce855bc JA |
7064 | /* Catch the valid and invalid brace expressions that made it through the |
7065 | tests above. */ | |
7066 | /* ${#-} is a valid expansion and means to take the length of $-. | |
7067 | Similarly for ${#?} and ${##}... */ | |
7068 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
28ef6c31 | 7069 | VALID_SPECIAL_LENGTH_PARAM (c) && string[sindex] == RBRACE) |
cce855bc | 7070 | { |
f73dda09 | 7071 | name = (char *)xrealloc (name, 3); |
cce855bc JA |
7072 | name[1] = c; |
7073 | name[2] = '\0'; | |
7074 | c = string[sindex++]; | |
7075 | } | |
7076 | ||
7077 | /* ...but ${#%}, ${#:}, ${#=}, ${#+}, and ${#/} are errors. */ | |
7078 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
7079 | member (c, "%:=+/") && string[sindex] == RBRACE) | |
7080 | { | |
7081 | temp = (char *)NULL; | |
7082 | goto bad_substitution; | |
7083 | } | |
e33f2203 | 7084 | |
cce855bc JA |
7085 | /* Indirect expansion begins with a `!'. A valid indirect expansion is |
7086 | either a variable name, one of the positional parameters or a special | |
7087 | variable that expands to one of the positional parameters. */ | |
7088 | want_indir = *name == '!' && | |
f73dda09 | 7089 | (legal_variable_starter ((unsigned char)name[1]) || DIGIT (name[1]) |
7117c2d2 | 7090 | || VALID_INDIR_PARAM (name[1])); |
ccc6cda3 JA |
7091 | |
7092 | /* Determine the value of this variable. */ | |
7093 | ||
cce855bc | 7094 | /* Check for special variables, directly referenced. */ |
bb70624e | 7095 | if (SPECIAL_VAR (name, want_indir)) |
ccc6cda3 JA |
7096 | var_is_special++; |
7097 | ||
cce855bc JA |
7098 | /* Check for special expansion things, like the length of a parameter */ |
7099 | if (*name == '#' && name[1]) | |
ccc6cda3 | 7100 | { |
cce855bc | 7101 | /* If we are not pointing at the character just after the |
28ef6c31 JA |
7102 | closing brace, then we haven't gotten all of the name. |
7103 | Since it begins with a special character, this is a bad | |
7104 | substitution. Also check NAME for validity before trying | |
7105 | to go on. */ | |
cce855bc | 7106 | if (string[sindex - 1] != RBRACE || (valid_length_expression (name) == 0)) |
ccc6cda3 JA |
7107 | { |
7108 | temp = (char *)NULL; | |
7109 | goto bad_substitution; | |
7110 | } | |
7111 | ||
7112 | number = parameter_brace_expand_length (name); | |
e05be32d CR |
7113 | if (number == INTMAX_MIN && unbound_vars_is_error) |
7114 | { | |
7115 | last_command_exit_value = EXECUTION_FAILURE; | |
7116 | err_unboundvar (name+1); | |
7117 | free (name); | |
7118 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7119 | } | |
ccc6cda3 JA |
7120 | free (name); |
7121 | ||
7122 | *indexp = sindex; | |
227f982e CR |
7123 | if (number < 0) |
7124 | return (&expand_wdesc_error); | |
7125 | else | |
7126 | { | |
7127 | ret = alloc_word_desc (); | |
7128 | ret->word = itos (number); | |
7129 | return ret; | |
7130 | } | |
ccc6cda3 JA |
7131 | } |
7132 | ||
7133 | /* ${@} is identical to $@. */ | |
7134 | if (name[0] == '@' && name[1] == '\0') | |
7135 | { | |
7136 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7137 | *quoted_dollar_atp = 1; | |
7138 | ||
7139 | if (contains_dollar_at) | |
7140 | *contains_dollar_at = 1; | |
348a457e CR |
7141 | |
7142 | tflag |= W_DOLLARAT; | |
ccc6cda3 JA |
7143 | } |
7144 | ||
d3a24ed2 | 7145 | /* Process ${!PREFIX*} expansion. */ |
bb70624e JA |
7146 | if (want_indir && string[sindex - 1] == RBRACE && |
7147 | (string[sindex - 2] == '*' || string[sindex - 2] == '@') && | |
f73dda09 | 7148 | legal_variable_starter ((unsigned char) name[1])) |
bb70624e JA |
7149 | { |
7150 | char **x; | |
7151 | WORD_LIST *xlist; | |
7152 | ||
7153 | temp1 = savestring (name + 1); | |
7154 | number = strlen (temp1); | |
7155 | temp1[number - 1] = '\0'; | |
7156 | x = all_variables_matching_prefix (temp1); | |
7117c2d2 | 7157 | xlist = strvec_to_word_list (x, 0, 0); |
28ef6c31 JA |
7158 | if (string[sindex - 2] == '*') |
7159 | temp = string_list_dollar_star (xlist); | |
7160 | else | |
7161 | { | |
7162 | temp = string_list_dollar_at (xlist, quoted); | |
7163 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7164 | *quoted_dollar_atp = 1; | |
7165 | if (contains_dollar_at) | |
7166 | *contains_dollar_at = 1; | |
348a457e CR |
7167 | |
7168 | tflag |= W_DOLLARAT; | |
28ef6c31 | 7169 | } |
bb70624e | 7170 | free (x); |
af98a2a6 | 7171 | dispose_words (xlist); |
bb70624e JA |
7172 | free (temp1); |
7173 | *indexp = sindex; | |
227f982e | 7174 | |
631b20c6 CR |
7175 | free (name); |
7176 | ||
227f982e CR |
7177 | ret = alloc_word_desc (); |
7178 | ret->word = temp; | |
348a457e | 7179 | ret->flags = tflag; /* XXX */ |
227f982e | 7180 | return ret; |
bb70624e | 7181 | } |
d3a24ed2 CR |
7182 | |
7183 | #if defined (ARRAY_VARS) | |
5e13499c CR |
7184 | /* Process ${!ARRAY[@]} and ${!ARRAY[*]} expansion. */ /* [ */ |
7185 | if (want_indir && string[sindex - 1] == RBRACE && | |
7186 | string[sindex - 2] == ']' && valid_array_reference (name+1)) | |
d3a24ed2 CR |
7187 | { |
7188 | char *x, *x1; | |
7189 | ||
7190 | temp1 = savestring (name + 1); | |
7191 | x = array_variable_name (temp1, &x1, (int *)0); /* [ */ | |
7192 | FREE (x); | |
7193 | if (ALL_ELEMENT_SUB (x1[0]) && x1[1] == ']') | |
7194 | { | |
fdf670ea | 7195 | temp = array_keys (temp1, quoted); /* handles assoc vars too */ |
d3a24ed2 CR |
7196 | if (x1[0] == '@') |
7197 | { | |
7198 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7199 | *quoted_dollar_atp = 1; | |
7200 | if (contains_dollar_at) | |
7201 | *contains_dollar_at = 1; | |
348a457e CR |
7202 | |
7203 | tflag |= W_DOLLARAT; | |
d3a24ed2 CR |
7204 | } |
7205 | ||
7206 | free (temp1); | |
7207 | *indexp = sindex; | |
227f982e CR |
7208 | |
7209 | ret = alloc_word_desc (); | |
7210 | ret->word = temp; | |
348a457e | 7211 | ret->flags = tflag; /* XXX */ |
227f982e | 7212 | return ret; |
d3a24ed2 CR |
7213 | } |
7214 | ||
7215 | free (temp1); | |
7216 | } | |
7217 | #endif /* ARRAY_VARS */ | |
bb70624e | 7218 | |
ccc6cda3 JA |
7219 | /* Make sure that NAME is valid before trying to go on. */ |
7220 | if (valid_brace_expansion_word (want_indir ? name + 1 : name, | |
7221 | var_is_special) == 0) | |
7222 | { | |
7223 | temp = (char *)NULL; | |
7224 | goto bad_substitution; | |
7225 | } | |
7226 | ||
7227 | if (want_indir) | |
227f982e | 7228 | tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 | 7229 | else |
208fdb50 | 7230 | tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&(PF_NOSPLIT2|PF_ASSIGNRHS)), &ind); |
227f982e CR |
7231 | |
7232 | if (tdesc) | |
7233 | { | |
7234 | temp = tdesc->word; | |
7235 | tflag = tdesc->flags; | |
7236 | dispose_word_desc (tdesc); | |
7237 | } | |
7238 | else | |
7239 | temp = (char *)0; | |
ccc6cda3 | 7240 | |
15623760 CR |
7241 | if (temp == &expand_param_error || temp == &expand_param_fatal) |
7242 | { | |
7243 | FREE (name); | |
7244 | FREE (value); | |
7245 | return (temp == &expand_param_error ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7246 | } | |
7247 | ||
ccc6cda3 | 7248 | #if defined (ARRAY_VARS) |
cce855bc | 7249 | if (valid_array_reference (name)) |
d3a24ed2 | 7250 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 JA |
7251 | #endif |
7252 | ||
7253 | var_is_set = temp != (char *)0; | |
7254 | var_is_null = check_nullness && (var_is_set == 0 || *temp == 0); | |
0500de0b CR |
7255 | /* XXX - this may not need to be restricted to special variables */ |
7256 | if (check_nullness) | |
3087e51c | 7257 | var_is_null |= var_is_set && var_is_special && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp); |
ccc6cda3 JA |
7258 | |
7259 | /* Get the rest of the stuff inside the braces. */ | |
cce855bc | 7260 | if (c && c != RBRACE) |
ccc6cda3 JA |
7261 | { |
7262 | /* Extract the contents of the ${ ... } expansion | |
28ef6c31 | 7263 | according to the Posix.2 rules. */ |
e192f341 | 7264 | value = extract_dollar_brace_string (string, &sindex, quoted, (c == '%' || c == '#' || c =='/' || c == '^' || c == ',' || c ==':') ? SX_POSIXEXP|SX_WORD : SX_WORD); |
cce855bc | 7265 | if (string[sindex] == RBRACE) |
28ef6c31 | 7266 | sindex++; |
ccc6cda3 JA |
7267 | else |
7268 | goto bad_substitution; | |
7269 | } | |
7270 | else | |
7271 | value = (char *)NULL; | |
726f6388 | 7272 | |
ccc6cda3 JA |
7273 | *indexp = sindex; |
7274 | ||
e05be32d CR |
7275 | /* All the cases where an expansion can possibly generate an unbound |
7276 | variable error. */ | |
7277 | if (want_substring || want_patsub || want_casemod || c == '#' || c == '%' || c == RBRACE) | |
7278 | { | |
7279 | if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1])) | |
7280 | { | |
7281 | last_command_exit_value = EXECUTION_FAILURE; | |
7282 | err_unboundvar (name); | |
7283 | FREE (value); | |
7284 | FREE (temp); | |
7285 | free (name); | |
7286 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7287 | } | |
7288 | } | |
7289 | ||
ccc6cda3 JA |
7290 | /* If this is a substring spec, process it and add the result. */ |
7291 | if (want_substring) | |
726f6388 | 7292 | { |
5f8cde23 | 7293 | temp1 = parameter_brace_substring (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7294 | FREE (name); |
7295 | FREE (value); | |
7296 | FREE (temp); | |
227f982e CR |
7297 | |
7298 | if (temp1 == &expand_param_error) | |
7299 | return (&expand_wdesc_error); | |
7300 | else if (temp1 == &expand_param_fatal) | |
7301 | return (&expand_wdesc_fatal); | |
7302 | ||
7303 | ret = alloc_word_desc (); | |
7304 | ret->word = temp1; | |
d3ad40de CR |
7305 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7306 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
227f982e | 7307 | return ret; |
726f6388 | 7308 | } |
ccc6cda3 | 7309 | else if (want_patsub) |
726f6388 | 7310 | { |
5f8cde23 | 7311 | temp1 = parameter_brace_patsub (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7312 | FREE (name); |
7313 | FREE (value); | |
7314 | FREE (temp); | |
227f982e CR |
7315 | |
7316 | if (temp1 == &expand_param_error) | |
7317 | return (&expand_wdesc_error); | |
7318 | else if (temp1 == &expand_param_fatal) | |
7319 | return (&expand_wdesc_fatal); | |
7320 | ||
40c8fbee CR |
7321 | ret = alloc_word_desc (); |
7322 | ret->word = temp1; | |
7323 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7324 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
227f982e | 7325 | return ret; |
ccc6cda3 | 7326 | } |
09767ff0 CR |
7327 | #if defined (CASEMOD_EXPANSIONS) |
7328 | else if (want_casemod) | |
7329 | { | |
5f8cde23 | 7330 | temp1 = parameter_brace_casemod (name, temp, ind, modspec, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
09767ff0 CR |
7331 | FREE (name); |
7332 | FREE (value); | |
7333 | FREE (temp); | |
7334 | ||
7335 | if (temp1 == &expand_param_error) | |
7336 | return (&expand_wdesc_error); | |
7337 | else if (temp1 == &expand_param_fatal) | |
7338 | return (&expand_wdesc_fatal); | |
7339 | ||
7340 | ret = alloc_word_desc (); | |
7341 | ret->word = temp1; | |
40c8fbee CR |
7342 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7343 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
09767ff0 CR |
7344 | return ret; |
7345 | } | |
7346 | #endif | |
726f6388 | 7347 | |
ccc6cda3 JA |
7348 | /* Do the right thing based on which character ended the variable name. */ |
7349 | switch (c) | |
7350 | { | |
7351 | default: | |
7352 | case '\0': | |
7353 | bad_substitution: | |
7f947b68 | 7354 | last_command_exit_value = EXECUTION_FAILURE; |
5e13499c | 7355 | report_error (_("%s: bad substitution"), string ? string : "??"); |
ccc6cda3 JA |
7356 | FREE (value); |
7357 | FREE (temp); | |
7358 | free (name); | |
227f982e | 7359 | return &expand_wdesc_error; |
ccc6cda3 | 7360 | |
cce855bc | 7361 | case RBRACE: |
ccc6cda3 | 7362 | break; |
726f6388 | 7363 | |
ccc6cda3 JA |
7364 | case '#': /* ${param#[#]pattern} */ |
7365 | case '%': /* ${param%[%]pattern} */ | |
7366 | if (value == 0 || *value == '\0' || temp == 0 || *temp == '\0') | |
28ef6c31 JA |
7367 | { |
7368 | FREE (value); | |
ccc6cda3 | 7369 | break; |
28ef6c31 | 7370 | } |
5f8cde23 | 7371 | temp1 = parameter_brace_remove_pattern (name, temp, ind, value, c, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7372 | free (temp); |
7373 | free (value); | |
3d35553a | 7374 | free (name); |
40c8fbee CR |
7375 | |
7376 | ret = alloc_word_desc (); | |
7377 | ret->word = temp1; | |
7378 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7379 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
7380 | return ret; | |
ccc6cda3 JA |
7381 | |
7382 | case '-': | |
7383 | case '=': | |
7384 | case '?': | |
7385 | case '+': | |
7386 | if (var_is_set && var_is_null == 0) | |
28ef6c31 JA |
7387 | { |
7388 | /* If the operator is `+', we don't want the value of the named | |
7389 | variable for anything, just the value of the right hand side. */ | |
ccc6cda3 JA |
7390 | if (c == '+') |
7391 | { | |
28ef6c31 JA |
7392 | /* XXX -- if we're double-quoted and the named variable is "$@", |
7393 | we want to turn off any special handling of "$@" -- | |
7394 | we're not using it, so whatever is on the rhs applies. */ | |
7395 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7396 | *quoted_dollar_atp = 0; | |
7397 | if (contains_dollar_at) | |
7398 | *contains_dollar_at = 0; | |
7399 | ||
ccc6cda3 JA |
7400 | FREE (temp); |
7401 | if (value) | |
28ef6c31 | 7402 | { |
6faad625 CR |
7403 | /* From Posix discussion on austin-group list. Issue 221 |
7404 | requires that backslashes escaping `}' inside | |
7405 | double-quoted ${...} be removed. */ | |
64419627 CR |
7406 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
7407 | quoted |= Q_DOLBRACE; | |
227f982e CR |
7408 | ret = parameter_brace_expand_rhs (name, value, c, |
7409 | quoted, | |
7410 | quoted_dollar_atp, | |
7411 | contains_dollar_at); | |
7412 | /* XXX - fix up later, esp. noting presence of | |
7413 | W_HASQUOTEDNULL in ret->flags */ | |
ccc6cda3 JA |
7414 | free (value); |
7415 | } | |
7416 | else | |
28ef6c31 | 7417 | temp = (char *)NULL; |
ccc6cda3 JA |
7418 | } |
7419 | else | |
7420 | { | |
7421 | FREE (value); | |
7422 | } | |
7423 | /* Otherwise do nothing; just use the value in TEMP. */ | |
726f6388 | 7424 | } |
ccc6cda3 | 7425 | else /* VAR not set or VAR is NULL. */ |
28ef6c31 | 7426 | { |
ccc6cda3 JA |
7427 | FREE (temp); |
7428 | temp = (char *)NULL; | |
7429 | if (c == '=' && var_is_special) | |
7430 | { | |
7f947b68 | 7431 | last_command_exit_value = EXECUTION_FAILURE; |
5e13499c | 7432 | report_error (_("$%s: cannot assign in this way"), name); |
ccc6cda3 JA |
7433 | free (name); |
7434 | free (value); | |
227f982e | 7435 | return &expand_wdesc_error; |
ccc6cda3 JA |
7436 | } |
7437 | else if (c == '?') | |
7438 | { | |
7439 | parameter_brace_expand_error (name, value); | |
227f982e | 7440 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
ccc6cda3 JA |
7441 | } |
7442 | else if (c != '+') | |
28ef6c31 JA |
7443 | { |
7444 | /* XXX -- if we're double-quoted and the named variable is "$@", | |
7445 | we want to turn off any special handling of "$@" -- | |
7446 | we're not using it, so whatever is on the rhs applies. */ | |
7447 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7448 | *quoted_dollar_atp = 0; | |
7449 | if (contains_dollar_at) | |
7450 | *contains_dollar_at = 0; | |
7451 | ||
6faad625 CR |
7452 | /* From Posix discussion on austin-group list. Issue 221 requires |
7453 | that backslashes escaping `}' inside double-quoted ${...} be | |
7454 | removed. */ | |
64419627 CR |
7455 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
7456 | quoted |= Q_DOLBRACE; | |
227f982e CR |
7457 | ret = parameter_brace_expand_rhs (name, value, c, quoted, |
7458 | quoted_dollar_atp, | |
7459 | contains_dollar_at); | |
7460 | /* XXX - fix up later, esp. noting presence of | |
7461 | W_HASQUOTEDNULL in tdesc->flags */ | |
28ef6c31 | 7462 | } |
ccc6cda3 | 7463 | free (value); |
726f6388 | 7464 | } |
28ef6c31 | 7465 | |
ccc6cda3 | 7466 | break; |
726f6388 | 7467 | } |
ccc6cda3 | 7468 | free (name); |
227f982e CR |
7469 | |
7470 | if (ret == 0) | |
7471 | { | |
7472 | ret = alloc_word_desc (); | |
7473 | ret->flags = tflag; | |
7474 | ret->word = temp; | |
7475 | } | |
7476 | return (ret); | |
726f6388 JA |
7477 | } |
7478 | ||
cce855bc JA |
7479 | /* Expand a single ${xxx} expansion. The braces are optional. When |
7480 | the braces are used, parameter_brace_expand() does the work, | |
7481 | possibly calling param_expand recursively. */ | |
227f982e | 7482 | static WORD_DESC * |
cce855bc JA |
7483 | param_expand (string, sindex, quoted, expanded_something, |
7484 | contains_dollar_at, quoted_dollar_at_p, had_quoted_null_p, | |
7485 | pflags) | |
7486 | char *string; | |
7487 | int *sindex, quoted, *expanded_something, *contains_dollar_at; | |
7488 | int *quoted_dollar_at_p, *had_quoted_null_p, pflags; | |
7489 | { | |
7117c2d2 | 7490 | char *temp, *temp1, uerror[3]; |
f73dda09 JA |
7491 | int zindex, t_index, expok; |
7492 | unsigned char c; | |
7117c2d2 | 7493 | intmax_t number; |
cce855bc | 7494 | SHELL_VAR *var; |
f73dda09 | 7495 | WORD_LIST *list; |
227f982e CR |
7496 | WORD_DESC *tdesc, *ret; |
7497 | int tflag; | |
cce855bc JA |
7498 | |
7499 | zindex = *sindex; | |
7500 | c = string[++zindex]; | |
7501 | ||
7502 | temp = (char *)NULL; | |
227f982e CR |
7503 | ret = tdesc = (WORD_DESC *)NULL; |
7504 | tflag = 0; | |
cce855bc JA |
7505 | |
7506 | /* Do simple cases first. Switch on what follows '$'. */ | |
7507 | switch (c) | |
7508 | { | |
7509 | /* $0 .. $9? */ | |
7510 | case '0': | |
7511 | case '1': | |
7512 | case '2': | |
7513 | case '3': | |
7514 | case '4': | |
7515 | case '5': | |
7516 | case '6': | |
7517 | case '7': | |
7518 | case '8': | |
7519 | case '9': | |
f73dda09 | 7520 | temp1 = dollar_vars[TODIGIT (c)]; |
cce855bc JA |
7521 | if (unbound_vars_is_error && temp1 == (char *)NULL) |
7522 | { | |
7117c2d2 JA |
7523 | uerror[0] = '$'; |
7524 | uerror[1] = c; | |
7525 | uerror[2] = '\0'; | |
cce855bc | 7526 | last_command_exit_value = EXECUTION_FAILURE; |
0d8616ff | 7527 | err_unboundvar (uerror); |
227f982e | 7528 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc | 7529 | } |
5ba8ff6e | 7530 | if (temp1) |
762a763b | 7531 | temp = (*temp1 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
5ba8ff6e CR |
7532 | ? quote_string (temp1) |
7533 | : quote_escapes (temp1); | |
7534 | else | |
7535 | temp = (char *)NULL; | |
227f982e | 7536 | |
cce855bc JA |
7537 | break; |
7538 | ||
7539 | /* $$ -- pid of the invoking shell. */ | |
7540 | case '$': | |
7541 | temp = itos (dollar_dollar_pid); | |
7542 | break; | |
7543 | ||
7544 | /* $# -- number of positional parameters. */ | |
7545 | case '#': | |
7546 | temp = itos (number_of_args ()); | |
7547 | break; | |
7548 | ||
7549 | /* $? -- return value of the last synchronous command. */ | |
7550 | case '?': | |
7551 | temp = itos (last_command_exit_value); | |
7552 | break; | |
7553 | ||
7554 | /* $- -- flags supplied to the shell on invocation or by `set'. */ | |
7555 | case '-': | |
7556 | temp = which_set_flags (); | |
7557 | break; | |
7558 | ||
7559 | /* $! -- Pid of the last asynchronous command. */ | |
7560 | case '!': | |
7561 | /* If no asynchronous pids have been created, expand to nothing. | |
7562 | If `set -u' has been executed, and no async processes have | |
7563 | been created, this is an expansion error. */ | |
7564 | if (last_asynchronous_pid == NO_PID) | |
7565 | { | |
7566 | if (expanded_something) | |
7567 | *expanded_something = 0; | |
7568 | temp = (char *)NULL; | |
7569 | if (unbound_vars_is_error) | |
7570 | { | |
7117c2d2 JA |
7571 | uerror[0] = '$'; |
7572 | uerror[1] = c; | |
7573 | uerror[2] = '\0'; | |
cce855bc | 7574 | last_command_exit_value = EXECUTION_FAILURE; |
0d8616ff | 7575 | err_unboundvar (uerror); |
227f982e | 7576 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc JA |
7577 | } |
7578 | } | |
7579 | else | |
f73dda09 | 7580 | temp = itos (last_asynchronous_pid); |
cce855bc JA |
7581 | break; |
7582 | ||
7583 | /* The only difference between this and $@ is when the arg is quoted. */ | |
7584 | case '*': /* `$*' */ | |
7585 | list = list_rest_of_args (); | |
7586 | ||
12ae1612 CR |
7587 | #if 0 |
7588 | /* According to austin-group posix proposal by Geoff Clare in | |
7589 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7590 | ||
7591 | "The shell shall write a message to standard error and | |
7592 | immediately exit when it tries to expand an unset parameter | |
7593 | other than the '@' and '*' special parameters." | |
7594 | */ | |
7595 | ||
1231ac47 | 7596 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) |
57a3f689 CR |
7597 | { |
7598 | uerror[0] = '$'; | |
7599 | uerror[1] = '*'; | |
7600 | uerror[2] = '\0'; | |
57a3f689 | 7601 | last_command_exit_value = EXECUTION_FAILURE; |
0d8616ff | 7602 | err_unboundvar (uerror); |
57a3f689 CR |
7603 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7604 | } | |
12ae1612 | 7605 | #endif |
57a3f689 | 7606 | |
cce855bc JA |
7607 | /* If there are no command-line arguments, this should just |
7608 | disappear if there are other characters in the expansion, | |
7609 | even if it's quoted. */ | |
7610 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && list == 0) | |
7611 | temp = (char *)NULL; | |
1231ac47 | 7612 | else if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
cce855bc JA |
7613 | { |
7614 | /* If we have "$*" we want to make a string of the positional | |
7615 | parameters, separated by the first character of $IFS, and | |
7616 | quote the whole string, including the separators. If IFS | |
7617 | is unset, the parameters are separated by ' '; if $IFS is | |
7618 | null, the parameters are concatenated. */ | |
1231ac47 | 7619 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_PATQUOTE)) ? string_list_dollar_star (list) : string_list (list); |
adc6cff5 CR |
7620 | if (temp) |
7621 | { | |
7622 | temp1 = quote_string (temp); | |
7623 | if (*temp == 0) | |
7624 | tflag |= W_HASQUOTEDNULL; | |
7625 | free (temp); | |
7626 | temp = temp1; | |
7627 | } | |
cce855bc JA |
7628 | } |
7629 | else | |
28ef6c31 | 7630 | { |
227f982e CR |
7631 | /* We check whether or not we're eventually going to split $* here, |
7632 | for example when IFS is empty and we are processing the rhs of | |
7633 | an assignment statement. In that case, we don't separate the | |
7634 | arguments at all. Otherwise, if the $* is not quoted it is | |
7635 | identical to $@ */ | |
227f982e CR |
7636 | # if defined (HANDLE_MULTIBYTE) |
7637 | if (expand_no_split_dollar_star && ifs_firstc[0] == 0) | |
7638 | # else | |
7639 | if (expand_no_split_dollar_star && ifs_firstc == 0) | |
7640 | # endif | |
7641 | temp = string_list_dollar_star (list); | |
7642 | else | |
f0c4de40 CR |
7643 | { |
7644 | temp = string_list_dollar_at (list, quoted); | |
1a81420a | 7645 | if (quoted == 0 && (ifs_is_set == 0 || ifs_is_null)) |
f0c4de40 | 7646 | tflag |= W_SPLITSPACE; |
f0c4de40 CR |
7647 | } |
7648 | ||
28ef6c31 JA |
7649 | if (expand_no_split_dollar_star == 0 && contains_dollar_at) |
7650 | *contains_dollar_at = 1; | |
7651 | } | |
cce855bc JA |
7652 | |
7653 | dispose_words (list); | |
7654 | break; | |
7655 | ||
7656 | /* When we have "$@" what we want is "$1" "$2" "$3" ... This | |
7657 | means that we have to turn quoting off after we split into | |
7658 | the individually quoted arguments so that the final split | |
7659 | on the first character of $IFS is still done. */ | |
7660 | case '@': /* `$@' */ | |
7661 | list = list_rest_of_args (); | |
7662 | ||
12ae1612 CR |
7663 | #if 0 |
7664 | /* According to austin-group posix proposal by Geoff Clare in | |
7665 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7666 | ||
7667 | "The shell shall write a message to standard error and | |
7668 | immediately exit when it tries to expand an unset parameter | |
7669 | other than the '@' and '*' special parameters." | |
7670 | */ | |
7671 | ||
1231ac47 | 7672 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) |
57a3f689 CR |
7673 | { |
7674 | uerror[0] = '$'; | |
7675 | uerror[1] = '@'; | |
7676 | uerror[2] = '\0'; | |
57a3f689 | 7677 | last_command_exit_value = EXECUTION_FAILURE; |
0d8616ff | 7678 | err_unboundvar (uerror); |
57a3f689 CR |
7679 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7680 | } | |
12ae1612 | 7681 | #endif |
57a3f689 | 7682 | |
cce855bc JA |
7683 | /* We want to flag the fact that we saw this. We can't turn |
7684 | off quoting entirely, because other characters in the | |
7685 | string might need it (consider "\"$@\""), but we need some | |
7686 | way to signal that the final split on the first character | |
7687 | of $IFS should be done, even though QUOTED is 1. */ | |
1231ac47 | 7688 | /* XXX - should this test include Q_PATQUOTE? */ |
cce855bc JA |
7689 | if (quoted_dollar_at_p && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7690 | *quoted_dollar_at_p = 1; | |
7691 | if (contains_dollar_at) | |
7692 | *contains_dollar_at = 1; | |
7693 | ||
7694 | /* We want to separate the positional parameters with the first | |
7695 | character of $IFS in case $IFS is something other than a space. | |
7696 | We also want to make sure that splitting is done no matter what -- | |
7697 | according to POSIX.2, this expands to a list of the positional | |
7698 | parameters no matter what IFS is set to. */ | |
40647963 | 7699 | temp = string_list_dollar_at (list, (pflags & PF_ASSIGNRHS) ? (quoted|Q_DOUBLE_QUOTES) : quoted); |
cce855bc | 7700 | |
348a457e | 7701 | tflag |= W_DOLLARAT; |
cce855bc JA |
7702 | dispose_words (list); |
7703 | break; | |
7704 | ||
7705 | case LBRACE: | |
e1e48bba | 7706 | tdesc = parameter_brace_expand (string, &zindex, quoted, pflags, |
227f982e CR |
7707 | quoted_dollar_at_p, |
7708 | contains_dollar_at); | |
7709 | ||
227f982e CR |
7710 | if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal) |
7711 | return (tdesc); | |
7712 | temp = tdesc ? tdesc->word : (char *)0; | |
cce855bc JA |
7713 | |
7714 | /* XXX */ | |
bb70624e | 7715 | /* Quoted nulls should be removed if there is anything else |
cce855bc JA |
7716 | in the string. */ |
7717 | /* Note that we saw the quoted null so we can add one back at | |
7718 | the end of this function if there are no other characters | |
28ef6c31 JA |
7719 | in the string, discard TEMP, and go on. The exception to |
7720 | this is when we have "${@}" and $1 is '', since $@ needs | |
7721 | special handling. */ | |
227f982e | 7722 | if (tdesc && tdesc->word && (tdesc->flags & W_HASQUOTEDNULL) && QUOTED_NULL (temp)) |
cce855bc JA |
7723 | { |
7724 | if (had_quoted_null_p) | |
7725 | *had_quoted_null_p = 1; | |
28ef6c31 JA |
7726 | if (*quoted_dollar_at_p == 0) |
7727 | { | |
7728 | free (temp); | |
227f982e | 7729 | tdesc->word = temp = (char *)NULL; |
28ef6c31 JA |
7730 | } |
7731 | ||
cce855bc JA |
7732 | } |
7733 | ||
227f982e | 7734 | ret = tdesc; |
cce855bc JA |
7735 | goto return0; |
7736 | ||
7737 | /* Do command or arithmetic substitution. */ | |
7738 | case LPAREN: | |
7739 | /* We have to extract the contents of this paren substitution. */ | |
7740 | t_index = zindex + 1; | |
e33f2203 | 7741 | temp = extract_command_subst (string, &t_index, 0); |
cce855bc JA |
7742 | zindex = t_index; |
7743 | ||
7744 | /* For Posix.2-style `$(( ))' arithmetic substitution, | |
28ef6c31 | 7745 | extract the expression and pass it to the evaluator. */ |
cce855bc JA |
7746 | if (temp && *temp == LPAREN) |
7747 | { | |
7748 | char *temp2; | |
7749 | temp1 = temp + 1; | |
7750 | temp2 = savestring (temp1); | |
7751 | t_index = strlen (temp2) - 1; | |
7752 | ||
7753 | if (temp2[t_index] != RPAREN) | |
7754 | { | |
7755 | free (temp2); | |
7756 | goto comsub; | |
7757 | } | |
7758 | ||
7759 | /* Cut off ending `)' */ | |
7760 | temp2[t_index] = '\0'; | |
7761 | ||
d3ad40de CR |
7762 | if (chk_arithsub (temp2, t_index) == 0) |
7763 | { | |
7764 | free (temp2); | |
984a1947 | 7765 | #if 0 |
ecf57862 | 7766 | internal_warning (_("future versions of the shell will force evaluation as an arithmetic substitution")); |
984a1947 | 7767 | #endif |
d3ad40de CR |
7768 | goto comsub; |
7769 | } | |
7770 | ||
cce855bc | 7771 | /* Expand variables found inside the expression. */ |
d3ad40de | 7772 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
cce855bc JA |
7773 | free (temp2); |
7774 | ||
7775 | arithsub: | |
7776 | /* No error messages. */ | |
7777 | this_command_name = (char *)NULL; | |
7778 | number = evalexp (temp1, &expok); | |
7779 | free (temp); | |
7780 | free (temp1); | |
7781 | if (expok == 0) | |
7782 | { | |
7783 | if (interactive_shell == 0 && posixly_correct) | |
7784 | { | |
7785 | last_command_exit_value = EXECUTION_FAILURE; | |
227f982e | 7786 | return (&expand_wdesc_fatal); |
cce855bc JA |
7787 | } |
7788 | else | |
227f982e | 7789 | return (&expand_wdesc_error); |
cce855bc JA |
7790 | } |
7791 | temp = itos (number); | |
7792 | break; | |
7793 | } | |
7794 | ||
7795 | comsub: | |
d3a24ed2 CR |
7796 | if (pflags & PF_NOCOMSUB) |
7797 | /* we need zindex+1 because string[zindex] == RPAREN */ | |
7798 | temp1 = substring (string, *sindex, zindex+1); | |
7799 | else | |
d3ad40de CR |
7800 | { |
7801 | tdesc = command_substitute (temp, quoted); | |
7802 | temp1 = tdesc ? tdesc->word : (char *)NULL; | |
e33f2203 CR |
7803 | if (tdesc) |
7804 | dispose_word_desc (tdesc); | |
d3ad40de | 7805 | } |
cce855bc JA |
7806 | FREE (temp); |
7807 | temp = temp1; | |
7808 | break; | |
7809 | ||
7810 | /* Do POSIX.2d9-style arithmetic substitution. This will probably go | |
7811 | away in a future bash release. */ | |
7812 | case '[': | |
bb70624e | 7813 | /* Extract the contents of this arithmetic substitution. */ |
cce855bc JA |
7814 | t_index = zindex + 1; |
7815 | temp = extract_arithmetic_subst (string, &t_index); | |
7816 | zindex = t_index; | |
35bb237e CR |
7817 | if (temp == 0) |
7818 | { | |
7819 | temp = savestring (string); | |
7820 | if (expanded_something) | |
7821 | *expanded_something = 0; | |
7822 | goto return0; | |
7823 | } | |
cce855bc JA |
7824 | |
7825 | /* Do initial variable expansion. */ | |
d3ad40de | 7826 | temp1 = expand_arith_string (temp, Q_DOUBLE_QUOTES); |
cce855bc JA |
7827 | |
7828 | goto arithsub; | |
7829 | ||
7830 | default: | |
7831 | /* Find the variable in VARIABLE_LIST. */ | |
7832 | temp = (char *)NULL; | |
7833 | ||
7834 | for (t_index = zindex; (c = string[zindex]) && legal_variable_char (c); zindex++) | |
7835 | ; | |
7836 | temp1 = (zindex > t_index) ? substring (string, t_index, zindex) : (char *)NULL; | |
7837 | ||
7838 | /* If this isn't a variable name, then just output the `$'. */ | |
7839 | if (temp1 == 0 || *temp1 == '\0') | |
7840 | { | |
7841 | FREE (temp1); | |
f73dda09 | 7842 | temp = (char *)xmalloc (2); |
cce855bc JA |
7843 | temp[0] = '$'; |
7844 | temp[1] = '\0'; | |
7845 | if (expanded_something) | |
7846 | *expanded_something = 0; | |
7847 | goto return0; | |
7848 | } | |
7849 | ||
7850 | /* If the variable exists, return its value cell. */ | |
7851 | var = find_variable (temp1); | |
7852 | ||
7117c2d2 | 7853 | if (var && invisible_p (var) == 0 && var_isset (var)) |
cce855bc JA |
7854 | { |
7855 | #if defined (ARRAY_VARS) | |
fdf670ea | 7856 | if (assoc_p (var) || array_p (var)) |
cce855bc | 7857 | { |
fdf670ea CR |
7858 | temp = array_p (var) ? array_reference (array_cell (var), 0) |
7859 | : assoc_reference (assoc_cell (var), "0"); | |
cce855bc | 7860 | if (temp) |
762a763b | 7861 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
5ba8ff6e CR |
7862 | ? quote_string (temp) |
7863 | : quote_escapes (temp); | |
5565fb1a CR |
7864 | else if (unbound_vars_is_error) |
7865 | goto unbound_variable; | |
cce855bc JA |
7866 | } |
7867 | else | |
7868 | #endif | |
762a763b CR |
7869 | { |
7870 | temp = value_cell (var); | |
7871 | ||
7872 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7873 | ? quote_string (temp) | |
7874 | : quote_escapes (temp); | |
7875 | } | |
5ba8ff6e | 7876 | |
cce855bc | 7877 | free (temp1); |
7117c2d2 | 7878 | |
cce855bc JA |
7879 | goto return0; |
7880 | } | |
d42cb8c1 CR |
7881 | else if (var = find_variable_last_nameref (temp1)) |
7882 | { | |
7883 | temp = nameref_cell (var); | |
15623760 | 7884 | #if defined (ARRAY_VARS) |
d42cb8c1 CR |
7885 | if (temp && *temp && valid_array_reference (temp)) |
7886 | { | |
f14388d3 | 7887 | tdesc = parameter_brace_expand_word (temp, SPECIAL_VAR (temp, 0), quoted, pflags, (arrayind_t *)NULL); |
d42cb8c1 CR |
7888 | if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal) |
7889 | return (tdesc); | |
7890 | ret = tdesc; | |
7891 | goto return0; | |
7892 | } | |
7893 | else | |
15623760 CR |
7894 | #endif |
7895 | /* y=2 ; typeset -n x=y; echo $x is not the same as echo $2 in ksh */ | |
7896 | if (temp && *temp && legal_identifier (temp) == 0) | |
7897 | { | |
7898 | last_command_exit_value = EXECUTION_FAILURE; | |
7899 | report_error (_("%s: invalid variable name for name reference"), temp); | |
7900 | return (&expand_wdesc_error); /* XXX */ | |
7901 | } | |
7902 | else | |
d42cb8c1 CR |
7903 | temp = (char *)NULL; |
7904 | } | |
cce855bc JA |
7905 | |
7906 | temp = (char *)NULL; | |
7907 | ||
5565fb1a | 7908 | unbound_variable: |
cce855bc | 7909 | if (unbound_vars_is_error) |
0d8616ff CR |
7910 | { |
7911 | last_command_exit_value = EXECUTION_FAILURE; | |
7912 | err_unboundvar (temp1); | |
7913 | } | |
cce855bc JA |
7914 | else |
7915 | { | |
7916 | free (temp1); | |
7917 | goto return0; | |
7918 | } | |
7919 | ||
7920 | free (temp1); | |
7921 | last_command_exit_value = EXECUTION_FAILURE; | |
7922 | return ((unbound_vars_is_error && interactive_shell == 0) | |
227f982e CR |
7923 | ? &expand_wdesc_fatal |
7924 | : &expand_wdesc_error); | |
cce855bc JA |
7925 | } |
7926 | ||
7927 | if (string[zindex]) | |
7928 | zindex++; | |
7929 | ||
7930 | return0: | |
7931 | *sindex = zindex; | |
227f982e CR |
7932 | |
7933 | if (ret == 0) | |
7934 | { | |
7935 | ret = alloc_word_desc (); | |
7936 | ret->flags = tflag; /* XXX */ | |
7937 | ret->word = temp; | |
7938 | } | |
7939 | return ret; | |
cce855bc JA |
7940 | } |
7941 | ||
7942 | /* Make a word list which is the result of parameter and variable | |
7943 | expansion, command substitution, arithmetic substitution, and | |
7944 | quote removal of WORD. Return a pointer to a WORD_LIST which is | |
7945 | the result of the expansion. If WORD contains a null word, the | |
7946 | word list returned is also null. | |
726f6388 | 7947 | |
ccc6cda3 JA |
7948 | QUOTED contains flag values defined in shell.h. |
7949 | ||
b72432fd JA |
7950 | ISEXP is used to tell expand_word_internal that the word should be |
7951 | treated as the result of an expansion. This has implications for | |
7952 | how IFS characters in the word are treated. | |
7953 | ||
726f6388 JA |
7954 | CONTAINS_DOLLAR_AT and EXPANDED_SOMETHING are return values; when non-null |
7955 | they point to an integer value which receives information about expansion. | |
7956 | CONTAINS_DOLLAR_AT gets non-zero if WORD contained "$@", else zero. | |
7957 | EXPANDED_SOMETHING get non-zero if WORD contained any parameter expansions, | |
7958 | else zero. | |
7959 | ||
7960 | This only does word splitting in the case of $@ expansion. In that | |
7961 | case, we split on ' '. */ | |
7962 | ||
7963 | /* Values for the local variable quoted_state. */ | |
7964 | #define UNQUOTED 0 | |
7965 | #define PARTIALLY_QUOTED 1 | |
7966 | #define WHOLLY_QUOTED 2 | |
7967 | ||
7968 | static WORD_LIST * | |
b72432fd | 7969 | expand_word_internal (word, quoted, isexp, contains_dollar_at, expanded_something) |
726f6388 | 7970 | WORD_DESC *word; |
b72432fd | 7971 | int quoted, isexp; |
726f6388 JA |
7972 | int *contains_dollar_at; |
7973 | int *expanded_something; | |
7974 | { | |
ccc6cda3 JA |
7975 | WORD_LIST *list; |
7976 | WORD_DESC *tword; | |
726f6388 JA |
7977 | |
7978 | /* The intermediate string that we build while expanding. */ | |
ccc6cda3 | 7979 | char *istring; |
726f6388 JA |
7980 | |
7981 | /* The current size of the above object. */ | |
ccc6cda3 | 7982 | int istring_size; |
726f6388 JA |
7983 | |
7984 | /* Index into ISTRING. */ | |
ccc6cda3 | 7985 | int istring_index; |
726f6388 JA |
7986 | |
7987 | /* Temporary string storage. */ | |
ccc6cda3 | 7988 | char *temp, *temp1; |
726f6388 JA |
7989 | |
7990 | /* The text of WORD. */ | |
ccc6cda3 | 7991 | register char *string; |
726f6388 | 7992 | |
7117c2d2 JA |
7993 | /* The size of STRING. */ |
7994 | size_t string_size; | |
7995 | ||
726f6388 | 7996 | /* The index into STRING. */ |
ccc6cda3 | 7997 | int sindex; |
726f6388 JA |
7998 | |
7999 | /* This gets 1 if we see a $@ while quoted. */ | |
ccc6cda3 | 8000 | int quoted_dollar_at; |
726f6388 JA |
8001 | |
8002 | /* One of UNQUOTED, PARTIALLY_QUOTED, or WHOLLY_QUOTED, depending on | |
8003 | whether WORD contains no quoting characters, a partially quoted | |
8004 | string (e.g., "xx"ab), or is fully quoted (e.g., "xxab"). */ | |
ccc6cda3 JA |
8005 | int quoted_state; |
8006 | ||
22e63b05 | 8007 | /* State flags */ |
ccc6cda3 | 8008 | int had_quoted_null; |
348a457e | 8009 | int has_dollar_at, temp_has_dollar_at; |
f0c4de40 | 8010 | int split_on_spaces; |
28ef6c31 | 8011 | int tflag; |
e1e48bba | 8012 | int pflags; /* flags passed to param_expand */ |
726f6388 | 8013 | |
22e63b05 CR |
8014 | int assignoff; /* If assignment, offset of `=' */ |
8015 | ||
f73dda09 | 8016 | register unsigned char c; /* Current character. */ |
726f6388 | 8017 | int t_index; /* For calls to string_extract_xxx. */ |
726f6388 | 8018 | |
bb70624e | 8019 | char twochars[2]; |
b72432fd | 8020 | |
7117c2d2 JA |
8021 | DECLARE_MBSTATE; |
8022 | ||
f73dda09 | 8023 | istring = (char *)xmalloc (istring_size = DEFAULT_INITIAL_ARRAY_SIZE); |
ccc6cda3 | 8024 | istring[istring_index = 0] = '\0'; |
cce855bc | 8025 | quoted_dollar_at = had_quoted_null = has_dollar_at = 0; |
f0c4de40 | 8026 | split_on_spaces = 0; |
ccc6cda3 JA |
8027 | quoted_state = UNQUOTED; |
8028 | ||
8029 | string = word->word; | |
8030 | if (string == 0) | |
8031 | goto finished_with_string; | |
da713c23 CR |
8032 | /* Don't need the string length for the SADD... and COPY_ macros unless |
8033 | multibyte characters are possible. */ | |
8034 | string_size = (MB_CUR_MAX > 1) ? strlen (string) : 1; | |
726f6388 JA |
8035 | |
8036 | if (contains_dollar_at) | |
8037 | *contains_dollar_at = 0; | |
8038 | ||
22e63b05 CR |
8039 | assignoff = -1; |
8040 | ||
726f6388 JA |
8041 | /* Begin the expansion. */ |
8042 | ||
ccc6cda3 | 8043 | for (sindex = 0; ;) |
726f6388 JA |
8044 | { |
8045 | c = string[sindex]; | |
8046 | ||
8047 | /* Case on toplevel character. */ | |
8048 | switch (c) | |
8049 | { | |
8050 | case '\0': | |
8051 | goto finished_with_string; | |
8052 | ||
8053 | case CTLESC: | |
7117c2d2 JA |
8054 | sindex++; |
8055 | #if HANDLE_MULTIBYTE | |
8056 | if (MB_CUR_MAX > 1 && string[sindex]) | |
8057 | { | |
545f34cf | 8058 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
8059 | } |
8060 | else | |
8061 | #endif | |
8062 | { | |
8063 | temp = (char *)xmalloc (3); | |
8064 | temp[0] = CTLESC; | |
8065 | temp[1] = c = string[sindex]; | |
8066 | temp[2] = '\0'; | |
8067 | } | |
726f6388 | 8068 | |
cce855bc | 8069 | dollar_add_string: |
726f6388 JA |
8070 | if (string[sindex]) |
8071 | sindex++; | |
8072 | ||
cce855bc JA |
8073 | add_string: |
8074 | if (temp) | |
8075 | { | |
8076 | istring = sub_append_string (temp, istring, &istring_index, &istring_size); | |
8077 | temp = (char *)0; | |
8078 | } | |
8079 | ||
8080 | break; | |
726f6388 JA |
8081 | |
8082 | #if defined (PROCESS_SUBSTITUTION) | |
8083 | /* Process substitution. */ | |
8084 | case '<': | |
8085 | case '>': | |
8086 | { | |
dc8fbaf9 | 8087 | if (string[++sindex] != LPAREN || (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (word->flags & (W_DQUOTE|W_NOPROCSUB)) || posixly_correct) |
726f6388 | 8088 | { |
bb70624e | 8089 | sindex--; /* add_character: label increments sindex */ |
726f6388 JA |
8090 | goto add_character; |
8091 | } | |
8092 | else | |
cce855bc | 8093 | t_index = sindex + 1; /* skip past both '<' and LPAREN */ |
726f6388 | 8094 | |
cce855bc | 8095 | temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index); /*))*/ |
ccc6cda3 | 8096 | sindex = t_index; |
726f6388 JA |
8097 | |
8098 | /* If the process substitution specification is `<()', we want to | |
8099 | open the pipe for writing in the child and produce output; if | |
8100 | it is `>()', we want to open the pipe for reading in the child | |
8101 | and consume input. */ | |
ccc6cda3 | 8102 | temp = temp1 ? process_substitute (temp1, (c == '>')) : (char *)0; |
726f6388 JA |
8103 | |
8104 | FREE (temp1); | |
8105 | ||
8106 | goto dollar_add_string; | |
8107 | } | |
8108 | #endif /* PROCESS_SUBSTITUTION */ | |
8109 | ||
22e63b05 CR |
8110 | case '=': |
8111 | /* Posix.2 section 3.6.1 says that tildes following `=' in words | |
8112 | which are not assignment statements are not expanded. If the | |
8113 | shell isn't in posix mode, though, we perform tilde expansion | |
8114 | on `likely candidate' unquoted assignment statements (flags | |
8115 | include W_ASSIGNMENT but not W_QUOTED). A likely candidate | |
8116 | contains an unquoted :~ or =~. Something to think about: we | |
8117 | now have a flag that says to perform tilde expansion on arguments | |
8118 | to `assignment builtins' like declare and export that look like | |
8119 | assignment statements. We now do tilde expansion on such words | |
8120 | even in POSIX mode. */ | |
8121 | if (word->flags & (W_ASSIGNRHS|W_NOTILDE)) | |
c1d39fb8 | 8122 | { |
e1e48bba | 8123 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
c1d39fb8 CR |
8124 | goto add_ifs_character; |
8125 | else | |
8126 | goto add_character; | |
8127 | } | |
22e63b05 CR |
8128 | /* If we're not in posix mode or forcing assignment-statement tilde |
8129 | expansion, note where the `=' appears in the word and prepare to | |
8130 | do tilde expansion following the first `='. */ | |
8131 | if ((word->flags & W_ASSIGNMENT) && | |
8132 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
8133 | assignoff == -1 && sindex > 0) | |
8134 | assignoff = sindex; | |
8135 | if (sindex == assignoff && string[sindex+1] == '~') /* XXX */ | |
8136 | word->flags |= W_ITILDE; | |
d90269dd | 8137 | #if 0 |
22e63b05 CR |
8138 | else if ((word->flags & W_ASSIGNMENT) && |
8139 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
8140 | string[sindex+1] == '~') | |
8141 | word->flags |= W_ITILDE; | |
d90269dd | 8142 | #endif |
e1e48bba | 8143 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
c1d39fb8 CR |
8144 | goto add_ifs_character; |
8145 | else | |
8146 | goto add_character; | |
22e63b05 CR |
8147 | |
8148 | case ':': | |
8149 | if (word->flags & W_NOTILDE) | |
c1d39fb8 | 8150 | { |
e1e48bba | 8151 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
c1d39fb8 CR |
8152 | goto add_ifs_character; |
8153 | else | |
8154 | goto add_character; | |
8155 | } | |
cdb32d45 CR |
8156 | |
8157 | if ((word->flags & (W_ASSIGNMENT|W_ASSIGNRHS|W_TILDEEXP)) && | |
22e63b05 CR |
8158 | string[sindex+1] == '~') |
8159 | word->flags |= W_ITILDE; | |
c1d39fb8 | 8160 | |
e1e48bba | 8161 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
c1d39fb8 CR |
8162 | goto add_ifs_character; |
8163 | else | |
8164 | goto add_character; | |
22e63b05 CR |
8165 | |
8166 | case '~': | |
8167 | /* If the word isn't supposed to be tilde expanded, or we're not | |
8168 | at the start of a word or after an unquoted : or = in an | |
8169 | assignment statement, we don't do tilde expansion. */ | |
da719982 | 8170 | if ((word->flags & (W_NOTILDE|W_DQUOTE)) || |
22e63b05 CR |
8171 | (sindex > 0 && ((word->flags & W_ITILDE) == 0)) || |
8172 | (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
8173 | { | |
8174 | word->flags &= ~W_ITILDE; | |
e1e48bba | 8175 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) |
c1d39fb8 CR |
8176 | goto add_ifs_character; |
8177 | else | |
8178 | goto add_character; | |
22e63b05 CR |
8179 | } |
8180 | ||
8181 | if (word->flags & W_ASSIGNRHS) | |
8182 | tflag = 2; | |
cdb32d45 | 8183 | else if (word->flags & (W_ASSIGNMENT|W_TILDEEXP)) |
22e63b05 CR |
8184 | tflag = 1; |
8185 | else | |
8186 | tflag = 0; | |
8187 | ||
8188 | temp = bash_tilde_find_word (string + sindex, tflag, &t_index); | |
8189 | ||
8190 | word->flags &= ~W_ITILDE; | |
8191 | ||
8192 | if (temp && *temp && t_index > 0) | |
8193 | { | |
8194 | temp1 = bash_tilde_expand (temp, tflag); | |
dc8fbaf9 CR |
8195 | if (temp1 && *temp1 == '~' && STREQ (temp, temp1)) |
8196 | { | |
8197 | FREE (temp); | |
8198 | FREE (temp1); | |
8199 | goto add_character; /* tilde expansion failed */ | |
8200 | } | |
22e63b05 CR |
8201 | free (temp); |
8202 | temp = temp1; | |
8203 | sindex += t_index; | |
866961ad | 8204 | goto add_quoted_string; /* XXX was add_string */ |
22e63b05 CR |
8205 | } |
8206 | else | |
8207 | { | |
8208 | FREE (temp); | |
8209 | goto add_character; | |
8210 | } | |
8211 | ||
726f6388 | 8212 | case '$': |
726f6388 JA |
8213 | if (expanded_something) |
8214 | *expanded_something = 1; | |
8215 | ||
348a457e | 8216 | temp_has_dollar_at = 0; |
e1e48bba CR |
8217 | pflags = (word->flags & W_NOCOMSUB) ? PF_NOCOMSUB : 0; |
8218 | if (word->flags & W_NOSPLIT2) | |
8219 | pflags |= PF_NOSPLIT2; | |
40647963 CR |
8220 | if (word->flags & W_ASSIGNRHS) |
8221 | pflags |= PF_ASSIGNRHS; | |
227f982e | 8222 | tword = param_expand (string, &sindex, quoted, expanded_something, |
348a457e | 8223 | &temp_has_dollar_at, "ed_dollar_at, |
e1e48bba | 8224 | &had_quoted_null, pflags); |
348a457e | 8225 | has_dollar_at += temp_has_dollar_at; |
f0c4de40 | 8226 | split_on_spaces += (tword->flags & W_SPLITSPACE); |
f0c4de40 | 8227 | |
227f982e | 8228 | if (tword == &expand_wdesc_error || tword == &expand_wdesc_fatal) |
726f6388 | 8229 | { |
cce855bc JA |
8230 | free (string); |
8231 | free (istring); | |
227f982e CR |
8232 | return ((tword == &expand_wdesc_error) ? &expand_word_error |
8233 | : &expand_word_fatal); | |
cce855bc JA |
8234 | } |
8235 | if (contains_dollar_at && has_dollar_at) | |
8236 | *contains_dollar_at = 1; | |
227f982e CR |
8237 | |
8238 | if (tword && (tword->flags & W_HASQUOTEDNULL)) | |
8239 | had_quoted_null = 1; | |
8240 | ||
77638cbf | 8241 | temp = tword ? tword->word : (char *)NULL; |
227f982e CR |
8242 | dispose_word_desc (tword); |
8243 | ||
efc2f955 CR |
8244 | /* Kill quoted nulls; we will add them back at the end of |
8245 | expand_word_internal if nothing else in the string */ | |
8246 | if (had_quoted_null && temp && QUOTED_NULL (temp)) | |
8247 | { | |
8248 | FREE (temp); | |
8249 | temp = (char *)NULL; | |
8250 | } | |
8251 | ||
cce855bc JA |
8252 | goto add_string; |
8253 | break; | |
726f6388 | 8254 | |
cce855bc JA |
8255 | case '`': /* Backquoted command substitution. */ |
8256 | { | |
d3a24ed2 | 8257 | t_index = sindex++; |
726f6388 | 8258 | |
e6598ba4 | 8259 | temp = string_extract (string, &sindex, "`", SX_REQMATCH); |
bc7bed50 CR |
8260 | /* The test of sindex against t_index is to allow bare instances of |
8261 | ` to pass through, for backwards compatibility. */ | |
7027abcb CR |
8262 | if (temp == &extract_string_error || temp == &extract_string_fatal) |
8263 | { | |
bc7bed50 CR |
8264 | if (sindex - 1 == t_index) |
8265 | { | |
8266 | sindex = t_index; | |
8267 | goto add_character; | |
8268 | } | |
7f947b68 | 8269 | last_command_exit_value = EXECUTION_FAILURE; |
d3ad40de | 8270 | report_error (_("bad substitution: no closing \"`\" in %s") , string+t_index); |
7027abcb CR |
8271 | free (string); |
8272 | free (istring); | |
8273 | return ((temp == &extract_string_error) ? &expand_word_error | |
8274 | : &expand_word_fatal); | |
8275 | } | |
8276 | ||
bc7bed50 CR |
8277 | if (expanded_something) |
8278 | *expanded_something = 1; | |
8279 | ||
d3a24ed2 CR |
8280 | if (word->flags & W_NOCOMSUB) |
8281 | /* sindex + 1 because string[sindex] == '`' */ | |
8282 | temp1 = substring (string, t_index, sindex + 1); | |
8283 | else | |
8284 | { | |
8285 | de_backslash (temp); | |
d3ad40de CR |
8286 | tword = command_substitute (temp, quoted); |
8287 | temp1 = tword ? tword->word : (char *)NULL; | |
e33f2203 CR |
8288 | if (tword) |
8289 | dispose_word_desc (tword); | |
d3a24ed2 | 8290 | } |
cce855bc JA |
8291 | FREE (temp); |
8292 | temp = temp1; | |
8293 | goto dollar_add_string; | |
8294 | } | |
ccc6cda3 | 8295 | |
cce855bc JA |
8296 | case '\\': |
8297 | if (string[sindex + 1] == '\n') | |
8298 | { | |
8299 | sindex += 2; | |
8300 | continue; | |
8301 | } | |
726f6388 | 8302 | |
cce855bc | 8303 | c = string[++sindex]; |
726f6388 | 8304 | |
cce855bc | 8305 | if (quoted & Q_HERE_DOCUMENT) |
28ef6c31 | 8306 | tflag = CBSHDOC; |
cce855bc | 8307 | else if (quoted & Q_DOUBLE_QUOTES) |
28ef6c31 | 8308 | tflag = CBSDQUOTE; |
cce855bc | 8309 | else |
28ef6c31 JA |
8310 | tflag = 0; |
8311 | ||
64419627 | 8312 | /* From Posix discussion on austin-group list: Backslash escaping |
9e51a74d CR |
8313 | a } in ${...} is removed. Issue 0000221 */ |
8314 | if ((quoted & Q_DOLBRACE) && c == RBRACE) | |
64419627 | 8315 | { |
ad4aef08 CR |
8316 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
8317 | } | |
8318 | /* This is the fix for " $@\ " */ | |
8319 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0) & isexp == 0 && isifs (c)) | |
8320 | { | |
8321 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, | |
8322 | DEFAULT_ARRAY_SIZE); | |
8323 | istring[istring_index++] = CTLESC; | |
8324 | istring[istring_index++] = '\\'; | |
8325 | istring[istring_index] = '\0'; | |
8326 | ||
64419627 CR |
8327 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
8328 | } | |
8329 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0)) | |
cce855bc | 8330 | { |
7117c2d2 | 8331 | SCOPY_CHAR_I (twochars, '\\', c, string, sindex, string_size); |
bb70624e JA |
8332 | } |
8333 | else if (c == 0) | |
8334 | { | |
8335 | c = CTLNUL; | |
8336 | sindex--; /* add_character: label increments sindex */ | |
8337 | goto add_character; | |
cce855bc JA |
8338 | } |
8339 | else | |
bb70624e | 8340 | { |
7117c2d2 | 8341 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
bb70624e | 8342 | } |
726f6388 | 8343 | |
bb70624e JA |
8344 | sindex++; |
8345 | add_twochars: | |
8346 | /* BEFORE jumping here, we need to increment sindex if appropriate */ | |
8347 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, | |
8348 | DEFAULT_ARRAY_SIZE); | |
8349 | istring[istring_index++] = twochars[0]; | |
8350 | istring[istring_index++] = twochars[1]; | |
8351 | istring[istring_index] = '\0'; | |
8352 | ||
8353 | break; | |
726f6388 | 8354 | |
cce855bc | 8355 | case '"': |
da719982 | 8356 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
cce855bc | 8357 | goto add_character; |
ccc6cda3 JA |
8358 | |
8359 | t_index = ++sindex; | |
8360 | temp = string_extract_double_quoted (string, &sindex, 0); | |
8361 | ||
8362 | /* If the quotes surrounded the entire string, then the | |
8363 | whole word was quoted. */ | |
8364 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
8365 | ? WHOLLY_QUOTED | |
7117c2d2 | 8366 | : PARTIALLY_QUOTED; |
ccc6cda3 JA |
8367 | |
8368 | if (temp && *temp) | |
726f6388 | 8369 | { |
227f982e CR |
8370 | tword = alloc_word_desc (); |
8371 | tword->word = temp; | |
8372 | ||
ccc6cda3 JA |
8373 | temp = (char *)NULL; |
8374 | ||
348a457e | 8375 | temp_has_dollar_at = 0; /* XXX */ |
227f982e | 8376 | /* Need to get W_HASQUOTEDNULL flag through this function. */ |
348a457e CR |
8377 | list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &temp_has_dollar_at, (int *)NULL); |
8378 | has_dollar_at += temp_has_dollar_at; | |
726f6388 | 8379 | |
ccc6cda3 JA |
8380 | if (list == &expand_word_error || list == &expand_word_fatal) |
8381 | { | |
8382 | free (istring); | |
8383 | free (string); | |
8384 | /* expand_word_internal has already freed temp_word->word | |
8385 | for us because of the way it prints error messages. */ | |
8386 | tword->word = (char *)NULL; | |
8387 | dispose_word (tword); | |
8388 | return list; | |
8389 | } | |
726f6388 | 8390 | |
ccc6cda3 | 8391 | dispose_word (tword); |
726f6388 | 8392 | |
ccc6cda3 JA |
8393 | /* "$@" (a double-quoted dollar-at) expands into nothing, |
8394 | not even a NULL word, when there are no positional | |
8395 | parameters. */ | |
cce855bc | 8396 | if (list == 0 && has_dollar_at) |
726f6388 | 8397 | { |
ccc6cda3 JA |
8398 | quoted_dollar_at++; |
8399 | break; | |
8400 | } | |
8401 | ||
8402 | /* If we get "$@", we know we have expanded something, so we | |
8403 | need to remember it for the final split on $IFS. This is | |
8404 | a special case; it's the only case where a quoted string | |
8405 | can expand into more than one word. It's going to come back | |
8406 | from the above call to expand_word_internal as a list with | |
8407 | a single word, in which all characters are quoted and | |
8408 | separated by blanks. What we want to do is to turn it back | |
8409 | into a list for the next piece of code. */ | |
8410 | if (list) | |
8411 | dequote_list (list); | |
8412 | ||
227f982e | 8413 | if (list && list->word && (list->word->flags & W_HASQUOTEDNULL)) |
efc2f955 | 8414 | had_quoted_null = 1; /* XXX */ |
227f982e | 8415 | |
cce855bc | 8416 | if (has_dollar_at) |
ccc6cda3 JA |
8417 | { |
8418 | quoted_dollar_at++; | |
8419 | if (contains_dollar_at) | |
8420 | *contains_dollar_at = 1; | |
8421 | if (expanded_something) | |
8422 | *expanded_something = 1; | |
8423 | } | |
8424 | } | |
8425 | else | |
8426 | { | |
8427 | /* What we have is "". This is a minor optimization. */ | |
f73dda09 | 8428 | FREE (temp); |
ccc6cda3 JA |
8429 | list = (WORD_LIST *)NULL; |
8430 | } | |
8431 | ||
8432 | /* The code above *might* return a list (consider the case of "$@", | |
8433 | where it returns "$1", "$2", etc.). We can't throw away the | |
8434 | rest of the list, and we have to make sure each word gets added | |
8435 | as quoted. We test on tresult->next: if it is non-NULL, we | |
8436 | quote the whole list, save it to a string with string_list, and | |
8437 | add that string. We don't need to quote the results of this | |
8438 | (and it would be wrong, since that would quote the separators | |
8439 | as well), so we go directly to add_string. */ | |
8440 | if (list) | |
8441 | { | |
8442 | if (list->next) | |
8443 | { | |
bc4cd23c JA |
8444 | /* Testing quoted_dollar_at makes sure that "$@" is |
8445 | split correctly when $IFS does not contain a space. */ | |
8446 | temp = quoted_dollar_at | |
8447 | ? string_list_dollar_at (list, Q_DOUBLE_QUOTES) | |
8448 | : string_list (quote_list (list)); | |
ccc6cda3 | 8449 | dispose_words (list); |
726f6388 JA |
8450 | goto add_string; |
8451 | } | |
8452 | else | |
8453 | { | |
ccc6cda3 | 8454 | temp = savestring (list->word->word); |
227f982e | 8455 | tflag = list->word->flags; |
ccc6cda3 | 8456 | dispose_words (list); |
227f982e | 8457 | |
cce855bc JA |
8458 | /* If the string is not a quoted null string, we want |
8459 | to remove any embedded unquoted CTLNUL characters. | |
8460 | We do not want to turn quoted null strings back into | |
8461 | the empty string, though. We do this because we | |
8462 | want to remove any quoted nulls from expansions that | |
8463 | contain other characters. For example, if we have | |
8464 | x"$*"y or "x$*y" and there are no positional parameters, | |
7117c2d2 | 8465 | the $* should expand into nothing. */ |
227f982e CR |
8466 | /* We use the W_HASQUOTEDNULL flag to differentiate the |
8467 | cases: a quoted null character as above and when | |
8468 | CTLNUL is contained in the (non-null) expansion | |
8469 | of some variable. We use the had_quoted_null flag to | |
10590446 | 8470 | pass the value through this function to its caller. */ |
227f982e | 8471 | if ((tflag & W_HASQUOTEDNULL) && QUOTED_NULL (temp) == 0) |
cce855bc | 8472 | remove_quoted_nulls (temp); /* XXX */ |
726f6388 JA |
8473 | } |
8474 | } | |
ccc6cda3 JA |
8475 | else |
8476 | temp = (char *)NULL; | |
726f6388 | 8477 | |
ccc6cda3 | 8478 | /* We do not want to add quoted nulls to strings that are only |
efc2f955 | 8479 | partially quoted; we can throw them away. The exception to |
f4f5e1c2 CR |
8480 | this is when we are going to be performing word splitting, |
8481 | since we have to preserve a null argument if the next character | |
8482 | will cause word splitting. */ | |
adc6cff5 | 8483 | if (temp == 0 && quoted_state == PARTIALLY_QUOTED && (word->flags & (W_NOSPLIT|W_NOSPLIT2))) |
cce855bc | 8484 | continue; |
726f6388 | 8485 | |
ccc6cda3 | 8486 | add_quoted_string: |
726f6388 | 8487 | |
ccc6cda3 JA |
8488 | if (temp) |
8489 | { | |
8490 | temp1 = temp; | |
8491 | temp = quote_string (temp); | |
8492 | free (temp1); | |
bb70624e | 8493 | goto add_string; |
ccc6cda3 JA |
8494 | } |
8495 | else | |
8496 | { | |
8497 | /* Add NULL arg. */ | |
bb70624e JA |
8498 | c = CTLNUL; |
8499 | sindex--; /* add_character: label increments sindex */ | |
8500 | goto add_character; | |
ccc6cda3 | 8501 | } |
bb70624e | 8502 | |
ccc6cda3 | 8503 | /* break; */ |
726f6388 | 8504 | |
ccc6cda3 | 8505 | case '\'': |
da719982 | 8506 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
ccc6cda3 | 8507 | goto add_character; |
726f6388 | 8508 | |
ccc6cda3 JA |
8509 | t_index = ++sindex; |
8510 | temp = string_extract_single_quoted (string, &sindex); | |
726f6388 | 8511 | |
ccc6cda3 JA |
8512 | /* If the entire STRING was surrounded by single quotes, |
8513 | then the string is wholly quoted. */ | |
8514 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
8515 | ? WHOLLY_QUOTED | |
7117c2d2 | 8516 | : PARTIALLY_QUOTED; |
726f6388 | 8517 | |
ccc6cda3 JA |
8518 | /* If all we had was '', it is a null expansion. */ |
8519 | if (*temp == '\0') | |
8520 | { | |
8521 | free (temp); | |
8522 | temp = (char *)NULL; | |
8523 | } | |
8524 | else | |
7117c2d2 | 8525 | remove_quoted_escapes (temp); /* ??? */ |
726f6388 | 8526 | |
ccc6cda3 JA |
8527 | /* We do not want to add quoted nulls to strings that are only |
8528 | partially quoted; such nulls are discarded. */ | |
8529 | if (temp == 0 && (quoted_state == PARTIALLY_QUOTED)) | |
8530 | continue; | |
726f6388 | 8531 | |
bb70624e JA |
8532 | /* If we have a quoted null expansion, add a quoted NULL to istring. */ |
8533 | if (temp == 0) | |
8534 | { | |
8535 | c = CTLNUL; | |
8536 | sindex--; /* add_character: label increments sindex */ | |
8537 | goto add_character; | |
8538 | } | |
8539 | else | |
8540 | goto add_quoted_string; | |
8541 | ||
ccc6cda3 | 8542 | /* break; */ |
726f6388 JA |
8543 | |
8544 | default: | |
726f6388 | 8545 | /* This is the fix for " $@ " */ |
c1d39fb8 | 8546 | add_ifs_character: |
7117c2d2 | 8547 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (isexp == 0 && isifs (c))) |
726f6388 | 8548 | { |
bb70624e JA |
8549 | if (string[sindex]) /* from old goto dollar_add_string */ |
8550 | sindex++; | |
8551 | if (c == 0) | |
8552 | { | |
8553 | c = CTLNUL; | |
8554 | goto add_character; | |
8555 | } | |
8556 | else | |
8557 | { | |
7117c2d2 | 8558 | #if HANDLE_MULTIBYTE |
545f34cf CR |
8559 | if (MB_CUR_MAX > 1) |
8560 | sindex--; | |
8561 | ||
7117c2d2 JA |
8562 | if (MB_CUR_MAX > 1) |
8563 | { | |
545f34cf | 8564 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
8565 | } |
8566 | else | |
8567 | #endif | |
8568 | { | |
8569 | twochars[0] = CTLESC; | |
8570 | twochars[1] = c; | |
8571 | goto add_twochars; | |
8572 | } | |
bb70624e | 8573 | } |
726f6388 JA |
8574 | } |
8575 | ||
7117c2d2 JA |
8576 | SADD_MBCHAR (temp, string, sindex, string_size); |
8577 | ||
726f6388 | 8578 | add_character: |
ccc6cda3 JA |
8579 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 1, istring_size, |
8580 | DEFAULT_ARRAY_SIZE); | |
726f6388 JA |
8581 | istring[istring_index++] = c; |
8582 | istring[istring_index] = '\0'; | |
8583 | ||
8584 | /* Next character. */ | |
8585 | sindex++; | |
8586 | } | |
8587 | } | |
8588 | ||
8589 | finished_with_string: | |
726f6388 JA |
8590 | /* OK, we're ready to return. If we have a quoted string, and |
8591 | quoted_dollar_at is not set, we do no splitting at all; otherwise | |
8592 | we split on ' '. The routines that call this will handle what to | |
8593 | do if nothing has been expanded. */ | |
ccc6cda3 JA |
8594 | |
8595 | /* Partially and wholly quoted strings which expand to the empty | |
8596 | string are retained as an empty arguments. Unquoted strings | |
8597 | which expand to the empty string are discarded. The single | |
8598 | exception is the case of expanding "$@" when there are no | |
8599 | positional parameters. In that case, we discard the expansion. */ | |
8600 | ||
8601 | /* Because of how the code that handles "" and '' in partially | |
8602 | quoted strings works, we need to make ISTRING into a QUOTED_NULL | |
8603 | if we saw quoting characters, but the expansion was empty. | |
8604 | "" and '' are tossed away before we get to this point when | |
8605 | processing partially quoted strings. This makes "" and $xxx"" | |
8606 | equivalent when xxx is unset. We also look to see whether we | |
8607 | saw a quoted null from a ${} expansion and add one back if we | |
8608 | need to. */ | |
8609 | ||
8610 | /* If we expand to nothing and there were no single or double quotes | |
8611 | in the word, we throw it away. Otherwise, we return a NULL word. | |
8612 | The single exception is for $@ surrounded by double quotes when | |
8613 | there are no positional parameters. In that case, we also throw | |
8614 | the word away. */ | |
8615 | ||
8616 | if (*istring == '\0') | |
8617 | { | |
8618 | if (quoted_dollar_at == 0 && (had_quoted_null || quoted_state == PARTIALLY_QUOTED)) | |
726f6388 | 8619 | { |
726f6388 JA |
8620 | istring[0] = CTLNUL; |
8621 | istring[1] = '\0'; | |
ccc6cda3 | 8622 | tword = make_bare_word (istring); |
227f982e | 8623 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ |
ccc6cda3 JA |
8624 | list = make_word_list (tword, (WORD_LIST *)NULL); |
8625 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
8626 | tword->flags |= W_QUOTED; | |
726f6388 | 8627 | } |
ccc6cda3 JA |
8628 | /* According to sh, ksh, and Posix.2, if a word expands into nothing |
8629 | and a double-quoted "$@" appears anywhere in it, then the entire | |
8630 | word is removed. */ | |
8631 | else if (quoted_state == UNQUOTED || quoted_dollar_at) | |
8632 | list = (WORD_LIST *)NULL; | |
8633 | #if 0 | |
8634 | else | |
726f6388 | 8635 | { |
ccc6cda3 | 8636 | tword = make_bare_word (istring); |
ccc6cda3 JA |
8637 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
8638 | tword->flags |= W_QUOTED; | |
227f982e | 8639 | list = make_word_list (tword, (WORD_LIST *)NULL); |
726f6388 | 8640 | } |
f73dda09 JA |
8641 | #else |
8642 | else | |
8643 | list = (WORD_LIST *)NULL; | |
ccc6cda3 JA |
8644 | #endif |
8645 | } | |
8646 | else if (word->flags & W_NOSPLIT) | |
8647 | { | |
8648 | tword = make_bare_word (istring); | |
ccc6cda3 JA |
8649 | if (word->flags & W_ASSIGNMENT) |
8650 | tword->flags |= W_ASSIGNMENT; /* XXX */ | |
43df7bbb CR |
8651 | if (word->flags & W_COMPASSIGN) |
8652 | tword->flags |= W_COMPASSIGN; /* XXX */ | |
b72432fd JA |
8653 | if (word->flags & W_NOGLOB) |
8654 | tword->flags |= W_NOGLOB; /* XXX */ | |
df0e4bfe CR |
8655 | if (word->flags & W_NOBRACE) |
8656 | tword->flags |= W_NOBRACE; /* XXX */ | |
43df7bbb CR |
8657 | if (word->flags & W_NOEXPAND) |
8658 | tword->flags |= W_NOEXPAND; /* XXX */ | |
ccc6cda3 | 8659 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
28ef6c31 | 8660 | tword->flags |= W_QUOTED; |
efc2f955 | 8661 | if (had_quoted_null && QUOTED_NULL (istring)) |
227f982e CR |
8662 | tword->flags |= W_HASQUOTEDNULL; |
8663 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
ccc6cda3 JA |
8664 | } |
8665 | else | |
8666 | { | |
8667 | char *ifs_chars; | |
8668 | ||
7117c2d2 | 8669 | ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL; |
726f6388 | 8670 | |
cce855bc JA |
8671 | /* If we have $@, we need to split the results no matter what. If |
8672 | IFS is unset or NULL, string_list_dollar_at has separated the | |
8673 | positional parameters with a space, so we split on space (we have | |
8674 | set ifs_chars to " \t\n" above if ifs is unset). If IFS is set, | |
8675 | string_list_dollar_at has separated the positional parameters | |
1a81420a CR |
8676 | with the first character of $IFS, so we split on $IFS. If |
8677 | SPLIT_ON_SPACES is set, we expanded $* (unquoted) with IFS either | |
8678 | unset or null, and we want to make sure that we split on spaces | |
8679 | regardless of what else has happened to IFS since the expansion. */ | |
8680 | if (split_on_spaces) | |
8681 | list = list_string (istring, " ", 1); /* XXX quoted == 1? */ | |
8682 | else if (has_dollar_at && ifs_chars) | |
cce855bc | 8683 | list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1); |
ccc6cda3 JA |
8684 | else |
8685 | { | |
8686 | tword = make_bare_word (istring); | |
ccc6cda3 JA |
8687 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED)) |
8688 | tword->flags |= W_QUOTED; | |
8689 | if (word->flags & W_ASSIGNMENT) | |
8690 | tword->flags |= W_ASSIGNMENT; | |
43df7bbb CR |
8691 | if (word->flags & W_COMPASSIGN) |
8692 | tword->flags |= W_COMPASSIGN; | |
b72432fd JA |
8693 | if (word->flags & W_NOGLOB) |
8694 | tword->flags |= W_NOGLOB; | |
df0e4bfe CR |
8695 | if (word->flags & W_NOBRACE) |
8696 | tword->flags |= W_NOBRACE; | |
43df7bbb CR |
8697 | if (word->flags & W_NOEXPAND) |
8698 | tword->flags |= W_NOEXPAND; | |
efc2f955 | 8699 | if (had_quoted_null && QUOTED_NULL (istring)) |
227f982e CR |
8700 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ |
8701 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
726f6388 | 8702 | } |
726f6388 | 8703 | } |
726f6388 | 8704 | |
ccc6cda3 JA |
8705 | free (istring); |
8706 | return (list); | |
726f6388 JA |
8707 | } |
8708 | ||
8709 | /* **************************************************************** */ | |
8710 | /* */ | |
8711 | /* Functions for Quote Removal */ | |
8712 | /* */ | |
8713 | /* **************************************************************** */ | |
8714 | ||
8715 | /* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the | |
7117c2d2 | 8716 | backslash quoting rules for within double quotes or a here document. */ |
726f6388 JA |
8717 | char * |
8718 | string_quote_removal (string, quoted) | |
8719 | char *string; | |
8720 | int quoted; | |
8721 | { | |
7117c2d2 JA |
8722 | size_t slen; |
8723 | char *r, *result_string, *temp, *send; | |
f73dda09 JA |
8724 | int sindex, tindex, dquote; |
8725 | unsigned char c; | |
7117c2d2 | 8726 | DECLARE_MBSTATE; |
726f6388 JA |
8727 | |
8728 | /* The result can be no longer than the original string. */ | |
7117c2d2 JA |
8729 | slen = strlen (string); |
8730 | send = string + slen; | |
8731 | ||
8732 | r = result_string = (char *)xmalloc (slen + 1); | |
726f6388 | 8733 | |
ccc6cda3 | 8734 | for (dquote = sindex = 0; c = string[sindex];) |
726f6388 JA |
8735 | { |
8736 | switch (c) | |
8737 | { | |
8738 | case '\\': | |
8739 | c = string[++sindex]; | |
33fe8777 CR |
8740 | if (c == 0) |
8741 | { | |
8742 | *r++ = '\\'; | |
8743 | break; | |
8744 | } | |
28ef6c31 | 8745 | if (((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) && (sh_syntaxtab[c] & CBSDQUOTE) == 0) |
726f6388 | 8746 | *r++ = '\\'; |
ccc6cda3 | 8747 | /* FALLTHROUGH */ |
726f6388 JA |
8748 | |
8749 | default: | |
7117c2d2 | 8750 | SCOPY_CHAR_M (r, string, send, sindex); |
726f6388 JA |
8751 | break; |
8752 | ||
8753 | case '\'': | |
ccc6cda3 | 8754 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) |
726f6388 JA |
8755 | { |
8756 | *r++ = c; | |
8757 | sindex++; | |
ccc6cda3 | 8758 | break; |
726f6388 | 8759 | } |
ccc6cda3 JA |
8760 | tindex = sindex + 1; |
8761 | temp = string_extract_single_quoted (string, &tindex); | |
8762 | if (temp) | |
726f6388 | 8763 | { |
ccc6cda3 JA |
8764 | strcpy (r, temp); |
8765 | r += strlen (r); | |
8766 | free (temp); | |
726f6388 | 8767 | } |
ccc6cda3 | 8768 | sindex = tindex; |
726f6388 JA |
8769 | break; |
8770 | ||
8771 | case '"': | |
8772 | dquote = 1 - dquote; | |
8773 | sindex++; | |
8774 | break; | |
8775 | } | |
8776 | } | |
8777 | *r = '\0'; | |
8778 | return (result_string); | |
8779 | } | |
8780 | ||
ccc6cda3 JA |
8781 | #if 0 |
8782 | /* UNUSED */ | |
726f6388 JA |
8783 | /* Perform quote removal on word WORD. This allocates and returns a new |
8784 | WORD_DESC *. */ | |
8785 | WORD_DESC * | |
8786 | word_quote_removal (word, quoted) | |
8787 | WORD_DESC *word; | |
8788 | int quoted; | |
8789 | { | |
8790 | WORD_DESC *w; | |
8791 | char *t; | |
8792 | ||
8793 | t = string_quote_removal (word->word, quoted); | |
227f982e CR |
8794 | w = alloc_word_desc (); |
8795 | w->word = t ? t : savestring (""); | |
726f6388 JA |
8796 | return (w); |
8797 | } | |
8798 | ||
8799 | /* Perform quote removal on all words in LIST. If QUOTED is non-zero, | |
8800 | the members of the list are treated as if they are surrounded by | |
8801 | double quotes. Return a new list, or NULL if LIST is NULL. */ | |
8802 | WORD_LIST * | |
8803 | word_list_quote_removal (list, quoted) | |
8804 | WORD_LIST *list; | |
8805 | int quoted; | |
8806 | { | |
227f982e | 8807 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 8808 | |
ccc6cda3 | 8809 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 8810 | { |
7117c2d2 | 8811 | tresult = make_word_list (word_quote_removal (t->word, quoted), (WORD_LIST *)NULL); |
227f982e | 8812 | #if 0 |
726f6388 | 8813 | result = (WORD_LIST *) list_append (result, tresult); |
227f982e CR |
8814 | #else |
8815 | if (result == 0) | |
8816 | result = e = tresult; | |
8817 | else | |
8818 | { | |
8819 | e->next = tresult; | |
8820 | while (e->next) | |
8821 | e = e->next; | |
8822 | } | |
8823 | #endif | |
726f6388 JA |
8824 | } |
8825 | return (result); | |
8826 | } | |
ccc6cda3 | 8827 | #endif |
726f6388 | 8828 | |
726f6388 JA |
8829 | /******************************************* |
8830 | * * | |
8831 | * Functions to perform word splitting * | |
8832 | * * | |
8833 | *******************************************/ | |
8834 | ||
7117c2d2 JA |
8835 | void |
8836 | setifs (v) | |
8837 | SHELL_VAR *v; | |
b72432fd | 8838 | { |
7117c2d2 JA |
8839 | char *t; |
8840 | unsigned char uc; | |
8841 | ||
8842 | ifs_var = v; | |
cdb32d45 | 8843 | ifs_value = (v && value_cell (v)) ? value_cell (v) : " \t\n"; |
b72432fd | 8844 | |
f0c4de40 CR |
8845 | ifs_is_set = ifs_var != 0; |
8846 | ifs_is_null = ifs_is_set && (*ifs_value == 0); | |
8847 | ||
633e5c6d CR |
8848 | /* Should really merge ifs_cmap with sh_syntaxtab. XXX - doesn't yet |
8849 | handle multibyte chars in IFS */ | |
7117c2d2 JA |
8850 | memset (ifs_cmap, '\0', sizeof (ifs_cmap)); |
8851 | for (t = ifs_value ; t && *t; t++) | |
8852 | { | |
8853 | uc = *t; | |
8854 | ifs_cmap[uc] = 1; | |
8855 | } | |
8856 | ||
633e5c6d CR |
8857 | #if defined (HANDLE_MULTIBYTE) |
8858 | if (ifs_value == 0) | |
8859 | { | |
8860 | ifs_firstc[0] = '\0'; | |
8861 | ifs_firstc_len = 1; | |
8862 | } | |
8863 | else | |
8864 | { | |
8865 | size_t ifs_len; | |
8866 | ifs_len = strnlen (ifs_value, MB_CUR_MAX); | |
8867 | ifs_firstc_len = MBLEN (ifs_value, ifs_len); | |
22e63b05 | 8868 | if (ifs_firstc_len == 1 || ifs_firstc_len == 0 || MB_INVALIDCH (ifs_firstc_len)) |
633e5c6d CR |
8869 | { |
8870 | ifs_firstc[0] = ifs_value[0]; | |
8871 | ifs_firstc[1] = '\0'; | |
8872 | ifs_firstc_len = 1; | |
8873 | } | |
8874 | else | |
8875 | memcpy (ifs_firstc, ifs_value, ifs_firstc_len); | |
8876 | } | |
8877 | #else | |
7117c2d2 | 8878 | ifs_firstc = ifs_value ? *ifs_value : 0; |
633e5c6d | 8879 | #endif |
7117c2d2 JA |
8880 | } |
8881 | ||
8882 | char * | |
8883 | getifs () | |
8884 | { | |
8885 | return ifs_value; | |
b72432fd JA |
8886 | } |
8887 | ||
726f6388 JA |
8888 | /* This splits a single word into a WORD LIST on $IFS, but only if the word |
8889 | is not quoted. list_string () performs quote removal for us, even if we | |
8890 | don't do any splitting. */ | |
8891 | WORD_LIST * | |
7117c2d2 | 8892 | word_split (w, ifs_chars) |
726f6388 | 8893 | WORD_DESC *w; |
7117c2d2 | 8894 | char *ifs_chars; |
726f6388 JA |
8895 | { |
8896 | WORD_LIST *result; | |
8897 | ||
8898 | if (w) | |
8899 | { | |
7117c2d2 | 8900 | char *xifs; |
726f6388 | 8901 | |
7117c2d2 JA |
8902 | xifs = ((w->flags & W_QUOTED) || ifs_chars == 0) ? "" : ifs_chars; |
8903 | result = list_string (w->word, xifs, w->flags & W_QUOTED); | |
726f6388 JA |
8904 | } |
8905 | else | |
8906 | result = (WORD_LIST *)NULL; | |
ccc6cda3 | 8907 | |
726f6388 JA |
8908 | return (result); |
8909 | } | |
8910 | ||
8911 | /* Perform word splitting on LIST and return the RESULT. It is possible | |
8912 | to return (WORD_LIST *)NULL. */ | |
8913 | static WORD_LIST * | |
8914 | word_list_split (list) | |
8915 | WORD_LIST *list; | |
8916 | { | |
37c41ab1 | 8917 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 8918 | |
ccc6cda3 | 8919 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 8920 | { |
7117c2d2 | 8921 | tresult = word_split (t->word, ifs_value); |
37c41ab1 CR |
8922 | if (result == 0) |
8923 | result = e = tresult; | |
8924 | else | |
8925 | { | |
8926 | e->next = tresult; | |
8927 | while (e->next) | |
8928 | e = e->next; | |
8929 | } | |
726f6388 JA |
8930 | } |
8931 | return (result); | |
8932 | } | |
8933 | ||
8934 | /************************************************** | |
8935 | * * | |
cce855bc | 8936 | * Functions to expand an entire WORD_LIST * |
726f6388 JA |
8937 | * * |
8938 | **************************************************/ | |
8939 | ||
d3a24ed2 CR |
8940 | /* Do any word-expansion-specific cleanup and jump to top_level */ |
8941 | static void | |
8942 | exp_jump_to_top_level (v) | |
8943 | int v; | |
8944 | { | |
f11997f8 CR |
8945 | set_pipestatus_from_exit (last_command_exit_value); |
8946 | ||
d3a24ed2 CR |
8947 | /* Cleanup code goes here. */ |
8948 | expand_no_split_dollar_star = 0; /* XXX */ | |
8949 | expanding_redir = 0; | |
d7f49990 | 8950 | assigning_in_environment = 0; |
d3a24ed2 | 8951 | |
2e4498b3 CR |
8952 | if (parse_and_execute_level == 0) |
8953 | top_level_cleanup (); /* from sig.c */ | |
8954 | ||
d3a24ed2 CR |
8955 | jump_to_top_level (v); |
8956 | } | |
8957 | ||
cce855bc JA |
8958 | /* Put NLIST (which is a WORD_LIST * of only one element) at the front of |
8959 | ELIST, and set ELIST to the new list. */ | |
8960 | #define PREPEND_LIST(nlist, elist) \ | |
8961 | do { nlist->next = elist; elist = nlist; } while (0) | |
8962 | ||
726f6388 JA |
8963 | /* Separate out any initial variable assignments from TLIST. If set -k has |
8964 | been executed, remove all assignment statements from TLIST. Initial | |
8965 | variable assignments and other environment assignments are placed | |
bb70624e | 8966 | on SUBST_ASSIGN_VARLIST. */ |
726f6388 JA |
8967 | static WORD_LIST * |
8968 | separate_out_assignments (tlist) | |
8969 | WORD_LIST *tlist; | |
8970 | { | |
8971 | register WORD_LIST *vp, *lp; | |
8972 | ||
0527c903 | 8973 | if (tlist == 0) |
726f6388 JA |
8974 | return ((WORD_LIST *)NULL); |
8975 | ||
bb70624e JA |
8976 | if (subst_assign_varlist) |
8977 | dispose_words (subst_assign_varlist); /* Clean up after previous error */ | |
b72432fd | 8978 | |
bb70624e | 8979 | subst_assign_varlist = (WORD_LIST *)NULL; |
726f6388 JA |
8980 | vp = lp = tlist; |
8981 | ||
8982 | /* Separate out variable assignments at the start of the command. | |
8983 | Loop invariant: vp->next == lp | |
8984 | Loop postcondition: | |
7117c2d2 JA |
8985 | lp = list of words left after assignment statements skipped |
8986 | tlist = original list of words | |
726f6388 | 8987 | */ |
ccc6cda3 | 8988 | while (lp && (lp->word->flags & W_ASSIGNMENT)) |
726f6388 JA |
8989 | { |
8990 | vp = lp; | |
8991 | lp = lp->next; | |
8992 | } | |
8993 | ||
bb70624e JA |
8994 | /* If lp != tlist, we have some initial assignment statements. |
8995 | We make SUBST_ASSIGN_VARLIST point to the list of assignment | |
8996 | words and TLIST point to the remaining words. */ | |
726f6388 JA |
8997 | if (lp != tlist) |
8998 | { | |
bb70624e | 8999 | subst_assign_varlist = tlist; |
726f6388 JA |
9000 | /* ASSERT(vp->next == lp); */ |
9001 | vp->next = (WORD_LIST *)NULL; /* terminate variable list */ | |
9002 | tlist = lp; /* remainder of word list */ | |
9003 | } | |
9004 | ||
9005 | /* vp == end of variable list */ | |
9006 | /* tlist == remainder of original word list without variable assignments */ | |
9007 | if (!tlist) | |
9008 | /* All the words in tlist were assignment statements */ | |
9009 | return ((WORD_LIST *)NULL); | |
9010 | ||
9011 | /* ASSERT(tlist != NULL); */ | |
ccc6cda3 | 9012 | /* ASSERT((tlist->word->flags & W_ASSIGNMENT) == 0); */ |
726f6388 JA |
9013 | |
9014 | /* If the -k option is in effect, we need to go through the remaining | |
bb70624e JA |
9015 | words, separate out the assignment words, and place them on |
9016 | SUBST_ASSIGN_VARLIST. */ | |
726f6388 JA |
9017 | if (place_keywords_in_env) |
9018 | { | |
9019 | WORD_LIST *tp; /* tp == running pointer into tlist */ | |
9020 | ||
9021 | tp = tlist; | |
9022 | lp = tlist->next; | |
9023 | ||
9024 | /* Loop Invariant: tp->next == lp */ | |
9025 | /* Loop postcondition: tlist == word list without assignment statements */ | |
9026 | while (lp) | |
9027 | { | |
ccc6cda3 | 9028 | if (lp->word->flags & W_ASSIGNMENT) |
726f6388 JA |
9029 | { |
9030 | /* Found an assignment statement, add this word to end of | |
bb70624e JA |
9031 | subst_assign_varlist (vp). */ |
9032 | if (!subst_assign_varlist) | |
9033 | subst_assign_varlist = vp = lp; | |
726f6388 JA |
9034 | else |
9035 | { | |
9036 | vp->next = lp; | |
9037 | vp = lp; | |
9038 | } | |
9039 | ||
9040 | /* Remove the word pointed to by LP from TLIST. */ | |
9041 | tp->next = lp->next; | |
9042 | /* ASSERT(vp == lp); */ | |
9043 | lp->next = (WORD_LIST *)NULL; | |
9044 | lp = tp->next; | |
9045 | } | |
9046 | else | |
9047 | { | |
9048 | tp = lp; | |
9049 | lp = lp->next; | |
9050 | } | |
9051 | } | |
9052 | } | |
9053 | return (tlist); | |
9054 | } | |
9055 | ||
cce855bc JA |
9056 | #define WEXP_VARASSIGN 0x001 |
9057 | #define WEXP_BRACEEXP 0x002 | |
9058 | #define WEXP_TILDEEXP 0x004 | |
9059 | #define WEXP_PARAMEXP 0x008 | |
9060 | #define WEXP_PATHEXP 0x010 | |
9061 | ||
9062 | /* All of the expansions, including variable assignments at the start of | |
9063 | the list. */ | |
9064 | #define WEXP_ALL (WEXP_VARASSIGN|WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
9065 | ||
9066 | /* All of the expansions except variable assignments at the start of | |
9067 | the list. */ | |
9068 | #define WEXP_NOVARS (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
9069 | ||
9070 | /* All of the `shell expansions': brace expansion, tilde expansion, parameter | |
9071 | expansion, command substitution, arithmetic expansion, word splitting, and | |
9072 | quote removal. */ | |
9073 | #define WEXP_SHELLEXP (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP) | |
9074 | ||
726f6388 JA |
9075 | /* Take the list of words in LIST and do the various substitutions. Return |
9076 | a new list of words which is the expanded list, and without things like | |
9077 | variable assignments. */ | |
9078 | ||
9079 | WORD_LIST * | |
9080 | expand_words (list) | |
9081 | WORD_LIST *list; | |
9082 | { | |
cce855bc | 9083 | return (expand_word_list_internal (list, WEXP_ALL)); |
726f6388 JA |
9084 | } |
9085 | ||
9086 | /* Same as expand_words (), but doesn't hack variable or environment | |
9087 | variables. */ | |
9088 | WORD_LIST * | |
9089 | expand_words_no_vars (list) | |
9090 | WORD_LIST *list; | |
9091 | { | |
cce855bc | 9092 | return (expand_word_list_internal (list, WEXP_NOVARS)); |
726f6388 JA |
9093 | } |
9094 | ||
cce855bc JA |
9095 | WORD_LIST * |
9096 | expand_words_shellexp (list) | |
726f6388 | 9097 | WORD_LIST *list; |
726f6388 | 9098 | { |
cce855bc JA |
9099 | return (expand_word_list_internal (list, WEXP_SHELLEXP)); |
9100 | } | |
726f6388 | 9101 | |
cce855bc JA |
9102 | static WORD_LIST * |
9103 | glob_expand_word_list (tlist, eflags) | |
9104 | WORD_LIST *tlist; | |
9105 | int eflags; | |
9106 | { | |
9107 | char **glob_array, *temp_string; | |
9108 | register int glob_index; | |
9109 | WORD_LIST *glob_list, *output_list, *disposables, *next; | |
9110 | WORD_DESC *tword; | |
726f6388 | 9111 | |
cce855bc JA |
9112 | output_list = disposables = (WORD_LIST *)NULL; |
9113 | glob_array = (char **)NULL; | |
9114 | while (tlist) | |
9115 | { | |
9116 | /* For each word, either globbing is attempted or the word is | |
9117 | added to orig_list. If globbing succeeds, the results are | |
9118 | added to orig_list and the word (tlist) is added to the list | |
9119 | of disposable words. If globbing fails and failed glob | |
9120 | expansions are left unchanged (the shell default), the | |
9121 | original word is added to orig_list. If globbing fails and | |
9122 | failed glob expansions are removed, the original word is | |
9123 | added to the list of disposable words. orig_list ends up | |
7117c2d2 | 9124 | in reverse order and requires a call to REVERSE_LIST to |
cce855bc JA |
9125 | be set right. After all words are examined, the disposable |
9126 | words are freed. */ | |
9127 | next = tlist->next; | |
726f6388 | 9128 | |
cce855bc | 9129 | /* If the word isn't an assignment and contains an unquoted |
28ef6c31 | 9130 | pattern matching character, then glob it. */ |
b72432fd | 9131 | if ((tlist->word->flags & W_NOGLOB) == 0 && |
cce855bc | 9132 | unquoted_glob_pattern_p (tlist->word->word)) |
726f6388 | 9133 | { |
cce855bc JA |
9134 | glob_array = shell_glob_filename (tlist->word->word); |
9135 | ||
9136 | /* Handle error cases. | |
9137 | I don't think we should report errors like "No such file | |
9138 | or directory". However, I would like to report errors | |
9139 | like "Read failed". */ | |
9140 | ||
d3a24ed2 | 9141 | if (glob_array == 0 || GLOB_FAILED (glob_array)) |
726f6388 | 9142 | { |
bb70624e | 9143 | glob_array = (char **)xmalloc (sizeof (char *)); |
cce855bc JA |
9144 | glob_array[0] = (char *)NULL; |
9145 | } | |
9146 | ||
9147 | /* Dequote the current word in case we have to use it. */ | |
9148 | if (glob_array[0] == NULL) | |
9149 | { | |
9150 | temp_string = dequote_string (tlist->word->word); | |
9151 | free (tlist->word->word); | |
9152 | tlist->word->word = temp_string; | |
9153 | } | |
9154 | ||
9155 | /* Make the array into a word list. */ | |
9156 | glob_list = (WORD_LIST *)NULL; | |
9157 | for (glob_index = 0; glob_array[glob_index]; glob_index++) | |
9158 | { | |
9159 | tword = make_bare_word (glob_array[glob_index]); | |
cce855bc JA |
9160 | glob_list = make_word_list (tword, glob_list); |
9161 | } | |
9162 | ||
9163 | if (glob_list) | |
9164 | { | |
9165 | output_list = (WORD_LIST *)list_append (glob_list, output_list); | |
9166 | PREPEND_LIST (tlist, disposables); | |
9167 | } | |
d3a24ed2 CR |
9168 | else if (fail_glob_expansion != 0) |
9169 | { | |
7f947b68 | 9170 | last_command_exit_value = EXECUTION_FAILURE; |
5e13499c | 9171 | report_error (_("no match: %s"), tlist->word->word); |
c184f645 | 9172 | exp_jump_to_top_level (DISCARD); |
d3a24ed2 | 9173 | } |
cce855bc JA |
9174 | else if (allow_null_glob_expansion == 0) |
9175 | { | |
9176 | /* Failed glob expressions are left unchanged. */ | |
9177 | PREPEND_LIST (tlist, output_list); | |
9178 | } | |
9179 | else | |
9180 | { | |
9181 | /* Failed glob expressions are removed. */ | |
9182 | PREPEND_LIST (tlist, disposables); | |
726f6388 | 9183 | } |
726f6388 | 9184 | } |
cce855bc JA |
9185 | else |
9186 | { | |
9187 | /* Dequote the string. */ | |
9188 | temp_string = dequote_string (tlist->word->word); | |
9189 | free (tlist->word->word); | |
9190 | tlist->word->word = temp_string; | |
9191 | PREPEND_LIST (tlist, output_list); | |
9192 | } | |
9193 | ||
7117c2d2 | 9194 | strvec_dispose (glob_array); |
cce855bc JA |
9195 | glob_array = (char **)NULL; |
9196 | ||
9197 | tlist = next; | |
726f6388 JA |
9198 | } |
9199 | ||
cce855bc JA |
9200 | if (disposables) |
9201 | dispose_words (disposables); | |
9202 | ||
9203 | if (output_list) | |
9204 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
9205 | ||
9206 | return (output_list); | |
9207 | } | |
726f6388 JA |
9208 | |
9209 | #if defined (BRACE_EXPANSION) | |
cce855bc JA |
9210 | static WORD_LIST * |
9211 | brace_expand_word_list (tlist, eflags) | |
9212 | WORD_LIST *tlist; | |
9213 | int eflags; | |
9214 | { | |
9215 | register char **expansions; | |
9216 | char *temp_string; | |
9217 | WORD_LIST *disposables, *output_list, *next; | |
9218 | WORD_DESC *w; | |
9219 | int eindex; | |
9220 | ||
9221 | for (disposables = output_list = (WORD_LIST *)NULL; tlist; tlist = next) | |
726f6388 | 9222 | { |
cce855bc | 9223 | next = tlist->next; |
726f6388 | 9224 | |
df0e4bfe CR |
9225 | if (tlist->word->flags & W_NOBRACE) |
9226 | { | |
3087e51c | 9227 | /*itrace("brace_expand_word_list: %s: W_NOBRACE", tlist->word->word);*/ |
df0e4bfe CR |
9228 | PREPEND_LIST (tlist, output_list); |
9229 | continue; | |
9230 | } | |
9231 | ||
6669f0e5 CR |
9232 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) |
9233 | { | |
9234 | /*itrace("brace_expand_word_list: %s: W_COMPASSIGN|W_ASSIGNARG", tlist->word->word);*/ | |
9235 | PREPEND_LIST (tlist, output_list); | |
9236 | continue; | |
9237 | } | |
df0e4bfe | 9238 | |
cce855bc JA |
9239 | /* Only do brace expansion if the word has a brace character. If |
9240 | not, just add the word list element to BRACES and continue. In | |
9241 | the common case, at least when running shell scripts, this will | |
d0ca3503 | 9242 | degenerate to a bunch of calls to `mbschr', and then what is |
cce855bc | 9243 | basically a reversal of TLIST into BRACES, which is corrected |
7117c2d2 | 9244 | by a call to REVERSE_LIST () on BRACES when the end of TLIST |
cce855bc | 9245 | is reached. */ |
d0ca3503 | 9246 | if (mbschr (tlist->word->word, LBRACE)) |
726f6388 | 9247 | { |
cce855bc | 9248 | expansions = brace_expand (tlist->word->word); |
726f6388 | 9249 | |
cce855bc | 9250 | for (eindex = 0; temp_string = expansions[eindex]; eindex++) |
726f6388 | 9251 | { |
51f7ea36 CR |
9252 | w = alloc_word_desc (); |
9253 | w->word = temp_string; | |
9254 | ||
cce855bc JA |
9255 | /* If brace expansion didn't change the word, preserve |
9256 | the flags. We may want to preserve the flags | |
9257 | unconditionally someday -- XXX */ | |
9258 | if (STREQ (temp_string, tlist->word->word)) | |
9259 | w->flags = tlist->word->flags; | |
51f7ea36 CR |
9260 | else |
9261 | w = make_word_flags (w, temp_string); | |
9262 | ||
cce855bc | 9263 | output_list = make_word_list (w, output_list); |
726f6388 | 9264 | } |
cce855bc | 9265 | free (expansions); |
726f6388 | 9266 | |
cce855bc JA |
9267 | /* Add TLIST to the list of words to be freed after brace |
9268 | expansion has been performed. */ | |
9269 | PREPEND_LIST (tlist, disposables); | |
9270 | } | |
9271 | else | |
9272 | PREPEND_LIST (tlist, output_list); | |
726f6388 | 9273 | } |
cce855bc JA |
9274 | |
9275 | if (disposables) | |
9276 | dispose_words (disposables); | |
9277 | ||
9278 | if (output_list) | |
9279 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
9280 | ||
9281 | return (output_list); | |
9282 | } | |
9283 | #endif | |
9284 | ||
fdf670ea CR |
9285 | #if defined (ARRAY_VARS) |
9286 | /* Take WORD, a compound associative array assignment, and internally run | |
9287 | 'declare -A w', where W is the variable name portion of WORD. */ | |
9288 | static int | |
9289 | make_internal_declare (word, option) | |
9290 | char *word; | |
9291 | char *option; | |
9292 | { | |
9293 | int t; | |
9294 | WORD_LIST *wl; | |
9295 | WORD_DESC *w; | |
9296 | ||
9297 | w = make_word (word); | |
9298 | ||
9299 | t = assignment (w->word, 0); | |
9300 | w->word[t] = '\0'; | |
9301 | ||
9302 | wl = make_word_list (w, (WORD_LIST *)NULL); | |
9303 | wl = make_word_list (make_word (option), wl); | |
9304 | ||
9305 | return (declare_builtin (wl)); | |
9306 | } | |
9307 | #endif | |
9308 | ||
cce855bc JA |
9309 | static WORD_LIST * |
9310 | shell_expand_word_list (tlist, eflags) | |
9311 | WORD_LIST *tlist; | |
9312 | int eflags; | |
9313 | { | |
9314 | WORD_LIST *expanded, *orig_list, *new_list, *next, *temp_list; | |
9315 | int expanded_something, has_dollar_at; | |
9316 | char *temp_string; | |
726f6388 | 9317 | |
726f6388 | 9318 | /* We do tilde expansion all the time. This is what 1003.2 says. */ |
cce855bc JA |
9319 | new_list = (WORD_LIST *)NULL; |
9320 | for (orig_list = tlist; tlist; tlist = next) | |
726f6388 | 9321 | { |
ccc6cda3 | 9322 | temp_string = tlist->word->word; |
726f6388 JA |
9323 | |
9324 | next = tlist->next; | |
9325 | ||
43df7bbb CR |
9326 | #if defined (ARRAY_VARS) |
9327 | /* If this is a compound array assignment to a builtin that accepts | |
9328 | such assignments (e.g., `declare'), take the assignment and perform | |
9329 | it separately, handling the semantics of declarations inside shell | |
9330 | functions. This avoids the double-evaluation of such arguments, | |
9331 | because `declare' does some evaluation of compound assignments on | |
9332 | its own. */ | |
9333 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) | |
9334 | { | |
9335 | int t; | |
9336 | ||
3087e51c CR |
9337 | if ((tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL)) == (W_ASSIGNASSOC|W_ASSNGLOBAL)) |
9338 | make_internal_declare (tlist->word->word, "-gA"); | |
9339 | else if (tlist->word->flags & W_ASSIGNASSOC) | |
fdf670ea | 9340 | make_internal_declare (tlist->word->word, "-A"); |
1a81420a | 9341 | else if ((tlist->word->flags & (W_ASSIGNARRAY|W_ASSNGLOBAL)) == (W_ASSIGNARRAY|W_ASSNGLOBAL)) |
36eb585c CR |
9342 | make_internal_declare (tlist->word->word, "-ga"); |
9343 | else if (tlist->word->flags & W_ASSIGNARRAY) | |
9344 | make_internal_declare (tlist->word->word, "-a"); | |
3087e51c CR |
9345 | else if (tlist->word->flags & W_ASSNGLOBAL) |
9346 | make_internal_declare (tlist->word->word, "-g"); | |
fdf670ea | 9347 | |
adc6cff5 | 9348 | t = do_word_assignment (tlist->word, 0); |
43df7bbb CR |
9349 | if (t == 0) |
9350 | { | |
9351 | last_command_exit_value = EXECUTION_FAILURE; | |
9352 | exp_jump_to_top_level (DISCARD); | |
9353 | } | |
9354 | ||
9355 | /* Now transform the word as ksh93 appears to do and go on */ | |
9356 | t = assignment (tlist->word->word, 0); | |
9357 | tlist->word->word[t] = '\0'; | |
36eb585c | 9358 | tlist->word->flags &= ~(W_ASSIGNMENT|W_NOSPLIT|W_COMPASSIGN|W_ASSIGNARG|W_ASSIGNASSOC|W_ASSIGNARRAY); |
43df7bbb CR |
9359 | } |
9360 | #endif | |
9361 | ||
ccc6cda3 | 9362 | expanded_something = 0; |
726f6388 | 9363 | expanded = expand_word_internal |
b72432fd | 9364 | (tlist->word, 0, 0, &has_dollar_at, &expanded_something); |
726f6388 JA |
9365 | |
9366 | if (expanded == &expand_word_error || expanded == &expand_word_fatal) | |
9367 | { | |
9368 | /* By convention, each time this error is returned, | |
9369 | tlist->word->word has already been freed. */ | |
9370 | tlist->word->word = (char *)NULL; | |
ccc6cda3 | 9371 | |
726f6388 JA |
9372 | /* Dispose our copy of the original list. */ |
9373 | dispose_words (orig_list); | |
d166f048 | 9374 | /* Dispose the new list we're building. */ |
726f6388 JA |
9375 | dispose_words (new_list); |
9376 | ||
28ef6c31 | 9377 | last_command_exit_value = EXECUTION_FAILURE; |
726f6388 | 9378 | if (expanded == &expand_word_error) |
d3a24ed2 | 9379 | exp_jump_to_top_level (DISCARD); |
726f6388 | 9380 | else |
d3a24ed2 | 9381 | exp_jump_to_top_level (FORCE_EOF); |
726f6388 JA |
9382 | } |
9383 | ||
ccc6cda3 JA |
9384 | /* Don't split words marked W_NOSPLIT. */ |
9385 | if (expanded_something && (tlist->word->flags & W_NOSPLIT) == 0) | |
726f6388 | 9386 | { |
ccc6cda3 | 9387 | temp_list = word_list_split (expanded); |
726f6388 JA |
9388 | dispose_words (expanded); |
9389 | } | |
9390 | else | |
9391 | { | |
9392 | /* If no parameter expansion, command substitution, process | |
9393 | substitution, or arithmetic substitution took place, then | |
9394 | do not do word splitting. We still have to remove quoted | |
9395 | null characters from the result. */ | |
9396 | word_list_remove_quoted_nulls (expanded); | |
ccc6cda3 | 9397 | temp_list = expanded; |
726f6388 JA |
9398 | } |
9399 | ||
ccc6cda3 JA |
9400 | expanded = REVERSE_LIST (temp_list, WORD_LIST *); |
9401 | new_list = (WORD_LIST *)list_append (expanded, new_list); | |
726f6388 JA |
9402 | } |
9403 | ||
cce855bc JA |
9404 | if (orig_list) |
9405 | dispose_words (orig_list); | |
726f6388 | 9406 | |
726f6388 | 9407 | if (new_list) |
cce855bc | 9408 | new_list = REVERSE_LIST (new_list, WORD_LIST *); |
726f6388 | 9409 | |
cce855bc JA |
9410 | return (new_list); |
9411 | } | |
726f6388 | 9412 | |
cce855bc JA |
9413 | /* The workhorse for expand_words () and expand_words_no_vars (). |
9414 | First arg is LIST, a WORD_LIST of words. | |
b72432fd JA |
9415 | Second arg EFLAGS is a flags word controlling which expansions are |
9416 | performed. | |
726f6388 | 9417 | |
cce855bc JA |
9418 | This does all of the substitutions: brace expansion, tilde expansion, |
9419 | parameter expansion, command substitution, arithmetic expansion, | |
9420 | process substitution, word splitting, and pathname expansion, according | |
9421 | to the bits set in EFLAGS. Words with the W_QUOTED or W_NOSPLIT bits | |
9422 | set, or for which no expansion is done, do not undergo word splitting. | |
df0e4bfe CR |
9423 | Words with the W_NOGLOB bit set do not undergo pathname expansion; words |
9424 | with W_NOBRACE set do not undergo brace expansion (see | |
9425 | brace_expand_word_list above). */ | |
cce855bc JA |
9426 | static WORD_LIST * |
9427 | expand_word_list_internal (list, eflags) | |
9428 | WORD_LIST *list; | |
9429 | int eflags; | |
9430 | { | |
9431 | WORD_LIST *new_list, *temp_list; | |
9432 | int tint; | |
726f6388 | 9433 | |
f0c4de40 | 9434 | tempenv_assign_error = 0; |
cce855bc JA |
9435 | if (list == 0) |
9436 | return ((WORD_LIST *)NULL); | |
726f6388 | 9437 | |
bb70624e | 9438 | garglist = new_list = copy_word_list (list); |
cce855bc JA |
9439 | if (eflags & WEXP_VARASSIGN) |
9440 | { | |
bb70624e | 9441 | garglist = new_list = separate_out_assignments (new_list); |
cce855bc JA |
9442 | if (new_list == 0) |
9443 | { | |
bb70624e | 9444 | if (subst_assign_varlist) |
cce855bc JA |
9445 | { |
9446 | /* All the words were variable assignments, so they are placed | |
9447 | into the shell's environment. */ | |
bb70624e | 9448 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
cce855bc JA |
9449 | { |
9450 | this_command_name = (char *)NULL; /* no arithmetic errors */ | |
adc6cff5 | 9451 | tint = do_word_assignment (temp_list->word, 0); |
cce855bc JA |
9452 | /* Variable assignment errors in non-interactive shells |
9453 | running in Posix.2 mode cause the shell to exit. */ | |
28ef6c31 | 9454 | if (tint == 0) |
ccc6cda3 | 9455 | { |
cce855bc | 9456 | last_command_exit_value = EXECUTION_FAILURE; |
28ef6c31 | 9457 | if (interactive_shell == 0 && posixly_correct) |
d3a24ed2 | 9458 | exp_jump_to_top_level (FORCE_EOF); |
28ef6c31 | 9459 | else |
d3a24ed2 | 9460 | exp_jump_to_top_level (DISCARD); |
ccc6cda3 | 9461 | } |
726f6388 | 9462 | } |
bb70624e JA |
9463 | dispose_words (subst_assign_varlist); |
9464 | subst_assign_varlist = (WORD_LIST *)NULL; | |
cce855bc JA |
9465 | } |
9466 | return ((WORD_LIST *)NULL); | |
9467 | } | |
9468 | } | |
726f6388 | 9469 | |
cce855bc JA |
9470 | /* Begin expanding the words that remain. The expansions take place on |
9471 | things that aren't really variable assignments. */ | |
726f6388 | 9472 | |
cce855bc JA |
9473 | #if defined (BRACE_EXPANSION) |
9474 | /* Do brace expansion on this word if there are any brace characters | |
9475 | in the string. */ | |
9476 | if ((eflags & WEXP_BRACEEXP) && brace_expansion && new_list) | |
9477 | new_list = brace_expand_word_list (new_list, eflags); | |
9478 | #endif /* BRACE_EXPANSION */ | |
726f6388 | 9479 | |
cce855bc JA |
9480 | /* Perform the `normal' shell expansions: tilde expansion, parameter and |
9481 | variable substitution, command substitution, arithmetic expansion, | |
9482 | and word splitting. */ | |
9483 | new_list = shell_expand_word_list (new_list, eflags); | |
726f6388 | 9484 | |
cce855bc JA |
9485 | /* Okay, we're almost done. Now let's just do some filename |
9486 | globbing. */ | |
9487 | if (new_list) | |
9488 | { | |
9489 | if ((eflags & WEXP_PATHEXP) && disallow_filename_globbing == 0) | |
9490 | /* Glob expand the word list unless globbing has been disabled. */ | |
9491 | new_list = glob_expand_word_list (new_list, eflags); | |
726f6388 | 9492 | else |
cce855bc JA |
9493 | /* Dequote the words, because we're not performing globbing. */ |
9494 | new_list = dequote_list (new_list); | |
726f6388 JA |
9495 | } |
9496 | ||
bb70624e | 9497 | if ((eflags & WEXP_VARASSIGN) && subst_assign_varlist) |
726f6388 | 9498 | { |
43df7bbb | 9499 | sh_wassign_func_t *assign_func; |
adc6cff5 | 9500 | int is_special_builtin, is_builtin_or_func; |
726f6388 JA |
9501 | |
9502 | /* If the remainder of the words expand to nothing, Posix.2 requires | |
9503 | that the variable and environment assignments affect the shell's | |
9504 | environment. */ | |
43df7bbb | 9505 | assign_func = new_list ? assign_in_env : do_word_assignment; |
56299fa5 | 9506 | tempenv_assign_error = 0; |
726f6388 | 9507 | |
adc6cff5 | 9508 | is_builtin_or_func = (new_list && new_list->word && (find_shell_builtin (new_list->word->word) || find_function (new_list->word->word))); |
e05be32d CR |
9509 | /* Posix says that special builtins exit if a variable assignment error |
9510 | occurs in an assignment preceding it. */ | |
adc6cff5 | 9511 | is_special_builtin = (posixly_correct && new_list && new_list->word && find_special_builtin (new_list->word->word)); |
e05be32d | 9512 | |
bb70624e | 9513 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
726f6388 | 9514 | { |
ccc6cda3 | 9515 | this_command_name = (char *)NULL; |
d7f49990 | 9516 | assigning_in_environment = (assign_func == assign_in_env); |
adc6cff5 | 9517 | tint = (*assign_func) (temp_list->word, is_builtin_or_func); |
d7f49990 | 9518 | assigning_in_environment = 0; |
ccc6cda3 JA |
9519 | /* Variable assignment errors in non-interactive shells running |
9520 | in Posix.2 mode cause the shell to exit. */ | |
56299fa5 | 9521 | if (tint == 0) |
ccc6cda3 | 9522 | { |
43df7bbb | 9523 | if (assign_func == do_word_assignment) |
56299fa5 CR |
9524 | { |
9525 | last_command_exit_value = EXECUTION_FAILURE; | |
e05be32d | 9526 | if (interactive_shell == 0 && posixly_correct && is_special_builtin) |
56299fa5 CR |
9527 | exp_jump_to_top_level (FORCE_EOF); |
9528 | else | |
9529 | exp_jump_to_top_level (DISCARD); | |
9530 | } | |
28ef6c31 | 9531 | else |
56299fa5 | 9532 | tempenv_assign_error++; |
ccc6cda3 | 9533 | } |
726f6388 | 9534 | } |
726f6388 | 9535 | |
bb70624e JA |
9536 | dispose_words (subst_assign_varlist); |
9537 | subst_assign_varlist = (WORD_LIST *)NULL; | |
726f6388 JA |
9538 | } |
9539 | ||
cce855bc | 9540 | return (new_list); |
ccc6cda3 | 9541 | } |