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Commit | Line | Data |
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95732b49 JA |
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 | ||
3185942a | 7 | /* Copyright (C) 1987-2009 Free Software Foundation, Inc. |
726f6388 JA |
8 | |
9 | This file is part of GNU Bash, the Bourne Again SHell. | |
10 | ||
3185942a JA |
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. | |
726f6388 | 15 | |
3185942a JA |
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. | |
726f6388 | 20 | |
3185942a JA |
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" |
3185942a JA |
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" | |
b80f6443 | 42 | #include "bashintl.h" |
726f6388 JA |
43 | |
44 | #include "shell.h" | |
45 | #include "flags.h" | |
46 | #include "jobs.h" | |
47 | #include "execute_cmd.h" | |
48 | #include "filecntl.h" | |
ccc6cda3 JA |
49 | #include "trap.h" |
50 | #include "pathexp.h" | |
51 | #include "mailcheck.h" | |
52 | ||
7117c2d2 JA |
53 | #include "shmbutil.h" |
54 | ||
ccc6cda3 JA |
55 | #include "builtins/getopt.h" |
56 | #include "builtins/common.h" | |
726f6388 | 57 | |
3185942a JA |
58 | #include "builtins/builtext.h" |
59 | ||
cce855bc | 60 | #include <tilde/tilde.h> |
f73dda09 | 61 | #include <glob/strmatch.h> |
ccc6cda3 JA |
62 | |
63 | #if !defined (errno) | |
64 | extern int errno; | |
65 | #endif /* !errno */ | |
726f6388 JA |
66 | |
67 | /* The size that strings change by. */ | |
d166f048 | 68 | #define DEFAULT_INITIAL_ARRAY_SIZE 112 |
ccc6cda3 JA |
69 | #define DEFAULT_ARRAY_SIZE 128 |
70 | ||
71 | /* Variable types. */ | |
72 | #define VT_VARIABLE 0 | |
73 | #define VT_POSPARMS 1 | |
74 | #define VT_ARRAYVAR 2 | |
d166f048 | 75 | #define VT_ARRAYMEMBER 3 |
3185942a | 76 | #define VT_ASSOCVAR 4 |
726f6388 | 77 | |
b80f6443 JA |
78 | #define VT_STARSUB 128 /* $* or ${array[*]} -- used to split */ |
79 | ||
ccc6cda3 JA |
80 | /* Flags for quoted_strchr */ |
81 | #define ST_BACKSL 0x01 | |
82 | #define ST_CTLESC 0x02 | |
7117c2d2 JA |
83 | #define ST_SQUOTE 0x04 /* unused yet */ |
84 | #define ST_DQUOTE 0x08 /* unused yet */ | |
85 | ||
b80f6443 JA |
86 | /* Flags for the `pflags' argument to param_expand() */ |
87 | #define PF_NOCOMSUB 0x01 /* Do not perform command substitution */ | |
89a92869 | 88 | #define PF_IGNUNBOUND 0x02 /* ignore unbound vars even if -u set */ |
0001803f | 89 | #define PF_NOSPLIT2 0x04 /* same as W_NOSPLIT2 */ |
b80f6443 | 90 | |
cce855bc JA |
91 | /* These defs make it easier to use the editor. */ |
92 | #define LBRACE '{' | |
93 | #define RBRACE '}' | |
94 | #define LPAREN '(' | |
95 | #define RPAREN ')' | |
726f6388 | 96 | |
0001803f CR |
97 | #if defined (HANDLE_MULTIBYTE) |
98 | #define WLPAREN L'(' | |
99 | #define WRPAREN L')' | |
100 | #endif | |
101 | ||
28ef6c31 JA |
102 | /* Evaluates to 1 if C is one of the shell's special parameters whose length |
103 | can be taken, but is also one of the special expansion characters. */ | |
104 | #define VALID_SPECIAL_LENGTH_PARAM(c) \ | |
105 | ((c) == '-' || (c) == '?' || (c) == '#') | |
106 | ||
107 | /* Evaluates to 1 if C is one of the shell's special parameters for which an | |
108 | indirect variable reference may be made. */ | |
109 | #define VALID_INDIR_PARAM(c) \ | |
110 | ((c) == '#' || (c) == '?' || (c) == '@' || (c) == '*') | |
111 | ||
112 | /* Evaluates to 1 if C is one of the OP characters that follows the parameter | |
113 | in ${parameter[:]OPword}. */ | |
7117c2d2 | 114 | #define VALID_PARAM_EXPAND_CHAR(c) (sh_syntaxtab[(unsigned char)c] & CSUBSTOP) |
28ef6c31 | 115 | |
bb70624e JA |
116 | /* Evaluates to 1 if this is one of the shell's special variables. */ |
117 | #define SPECIAL_VAR(name, wi) \ | |
f73dda09 JA |
118 | ((DIGIT (*name) && all_digits (name)) || \ |
119 | (name[1] == '\0' && (sh_syntaxtab[(unsigned char)*name] & CSPECVAR)) || \ | |
28ef6c31 | 120 | (wi && name[2] == '\0' && VALID_INDIR_PARAM (name[1]))) |
bb70624e | 121 | |
f73dda09 JA |
122 | /* An expansion function that takes a string and a quoted flag and returns |
123 | a WORD_LIST *. Used as the type of the third argument to | |
124 | expand_string_if_necessary(). */ | |
125 | typedef WORD_LIST *EXPFUNC __P((char *, int)); | |
126 | ||
726f6388 JA |
127 | /* Process ID of the last command executed within command substitution. */ |
128 | pid_t last_command_subst_pid = NO_PID; | |
b72432fd | 129 | pid_t current_command_subst_pid = NO_PID; |
726f6388 | 130 | |
7117c2d2 JA |
131 | /* Variables used to keep track of the characters in IFS. */ |
132 | SHELL_VAR *ifs_var; | |
133 | char *ifs_value; | |
134 | unsigned char ifs_cmap[UCHAR_MAX + 1]; | |
95732b49 JA |
135 | |
136 | #if defined (HANDLE_MULTIBYTE) | |
137 | unsigned char ifs_firstc[MB_LEN_MAX]; | |
138 | size_t ifs_firstc_len; | |
139 | #else | |
7117c2d2 | 140 | unsigned char ifs_firstc; |
95732b49 | 141 | #endif |
7117c2d2 | 142 | |
0001803f CR |
143 | /* Sentinel to tell when we are performing variable assignments preceding a |
144 | command name and putting them into the environment. Used to make sure | |
145 | we use the temporary environment when looking up variable values. */ | |
3185942a JA |
146 | int assigning_in_environment; |
147 | ||
0001803f CR |
148 | /* Used to hold a list of variable assignments preceding a command. Global |
149 | so the SIGCHLD handler in jobs.c can unwind-protect it when it runs a | |
150 | SIGCHLD trap and so it can be saved and restored by the trap handlers. */ | |
151 | WORD_LIST *subst_assign_varlist = (WORD_LIST *)NULL; | |
152 | ||
726f6388 | 153 | /* Extern functions and variables from different files. */ |
b80f6443 | 154 | extern int last_command_exit_value, last_command_exit_signal; |
0001803f CR |
155 | extern int subshell_environment, line_number; |
156 | extern int subshell_level, parse_and_execute_level, sourcelevel; | |
7117c2d2 | 157 | extern int eof_encountered; |
bb70624e | 158 | extern int return_catch_flag, return_catch_value; |
f73dda09 | 159 | extern pid_t dollar_dollar_pid; |
726f6388 | 160 | extern int posixly_correct; |
726f6388 | 161 | extern char *this_command_name; |
ccc6cda3 | 162 | extern struct fd_bitmap *current_fds_to_close; |
cce855bc | 163 | extern int wordexp_only; |
b80f6443 JA |
164 | extern int expanding_redir; |
165 | extern int tempenv_assign_error; | |
726f6388 | 166 | |
0628567a JA |
167 | #if !defined (HAVE_WCSDUP) && defined (HANDLE_MULTIBYTE) |
168 | extern wchar_t *wcsdup __P((const wchar_t *)); | |
169 | #endif | |
170 | ||
ccc6cda3 JA |
171 | /* Non-zero means to allow unmatched globbed filenames to expand to |
172 | a null file. */ | |
173 | int allow_null_glob_expansion; | |
174 | ||
b80f6443 JA |
175 | /* Non-zero means to throw an error when globbing fails to match anything. */ |
176 | int fail_glob_expansion; | |
177 | ||
f73dda09 | 178 | #if 0 |
ccc6cda3 JA |
179 | /* Variables to keep track of which words in an expanded word list (the |
180 | output of expand_word_list_internal) are the result of globbing | |
f73dda09 JA |
181 | expansions. GLOB_ARGV_FLAGS is used by execute_cmd.c. |
182 | (CURRENTLY UNUSED). */ | |
ccc6cda3 JA |
183 | char *glob_argv_flags; |
184 | static int glob_argv_flags_size; | |
f73dda09 | 185 | #endif |
726f6388 JA |
186 | |
187 | static WORD_LIST expand_word_error, expand_word_fatal; | |
95732b49 | 188 | static WORD_DESC expand_wdesc_error, expand_wdesc_fatal; |
726f6388 | 189 | static char expand_param_error, expand_param_fatal; |
95732b49 | 190 | static char extract_string_error, extract_string_fatal; |
726f6388 | 191 | |
28ef6c31 JA |
192 | /* Tell the expansion functions to not longjmp back to top_level on fatal |
193 | errors. Enabled when doing completion and prompt string expansion. */ | |
194 | static int no_longjmp_on_fatal_error = 0; | |
195 | ||
196 | /* Set by expand_word_unsplit; used to inhibit splitting and re-joining | |
197 | $* on $IFS, primarily when doing assignment statements. */ | |
198 | static int expand_no_split_dollar_star = 0; | |
bb70624e | 199 | |
bb70624e JA |
200 | /* A WORD_LIST of words to be expanded by expand_word_list_internal, |
201 | without any leading variable assignments. */ | |
202 | static WORD_LIST *garglist = (WORD_LIST *)NULL; | |
b72432fd | 203 | |
f73dda09 | 204 | static char *quoted_substring __P((char *, int, int)); |
7117c2d2 JA |
205 | static int quoted_strlen __P((char *)); |
206 | static char *quoted_strchr __P((char *, int, int)); | |
f73dda09 JA |
207 | |
208 | static char *expand_string_if_necessary __P((char *, int, EXPFUNC *)); | |
209 | static inline char *expand_string_to_string_internal __P((char *, int, EXPFUNC *)); | |
210 | static WORD_LIST *call_expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
211 | static WORD_LIST *expand_string_internal __P((char *, int)); | |
212 | static WORD_LIST *expand_string_leave_quoted __P((char *, int)); | |
213 | static WORD_LIST *expand_string_for_rhs __P((char *, int, int *, int *)); | |
214 | ||
f73dda09 JA |
215 | static WORD_LIST *list_quote_escapes __P((WORD_LIST *)); |
216 | static char *make_quoted_char __P((int)); | |
217 | static WORD_LIST *quote_list __P((WORD_LIST *)); | |
f73dda09 JA |
218 | |
219 | static int unquoted_substring __P((char *, char *)); | |
220 | static int unquoted_member __P((int, char *)); | |
221 | ||
95732b49 JA |
222 | #if defined (ARRAY_VARS) |
223 | static SHELL_VAR *do_compound_assignment __P((char *, char *, int)); | |
224 | #endif | |
225 | static int do_assignment_internal __P((const WORD_DESC *, int)); | |
f73dda09 | 226 | |
3185942a | 227 | static char *string_extract_verbatim __P((char *, size_t, int *, char *, int)); |
f73dda09 JA |
228 | static char *string_extract __P((char *, int *, char *, int)); |
229 | static char *string_extract_double_quoted __P((char *, int *, int)); | |
7117c2d2 | 230 | static inline char *string_extract_single_quoted __P((char *, int *)); |
0628567a | 231 | static inline int skip_single_quoted __P((const char *, size_t, int)); |
7117c2d2 JA |
232 | static int skip_double_quoted __P((char *, size_t, int)); |
233 | static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int)); | |
234 | static char *extract_dollar_brace_string __P((char *, int *, int, int)); | |
89a92869 | 235 | static int skip_matched_pair __P((const char *, int, int, int, int)); |
f73dda09 | 236 | |
f73dda09 JA |
237 | static char *pos_params __P((char *, int, int, int)); |
238 | ||
b80f6443 JA |
239 | static unsigned char *mb_getcharlens __P((char *, int)); |
240 | ||
241 | static char *remove_upattern __P((char *, char *, int)); | |
0628567a | 242 | #if defined (HANDLE_MULTIBYTE) |
b80f6443 JA |
243 | static wchar_t *remove_wpattern __P((wchar_t *, size_t, wchar_t *, int)); |
244 | #endif | |
f73dda09 | 245 | static char *remove_pattern __P((char *, char *, int)); |
b80f6443 | 246 | |
f73dda09 | 247 | static int match_pattern_char __P((char *, char *)); |
b80f6443 JA |
248 | static int match_upattern __P((char *, char *, int, char **, char **)); |
249 | #if defined (HANDLE_MULTIBYTE) | |
250 | static int match_pattern_wchar __P((wchar_t *, wchar_t *)); | |
251 | static int match_wpattern __P((wchar_t *, char **, size_t, wchar_t *, int, char **, char **)); | |
252 | #endif | |
f73dda09 JA |
253 | static int match_pattern __P((char *, char *, int, char **, char **)); |
254 | static int getpatspec __P((int, char *)); | |
255 | static char *getpattern __P((char *, int, int)); | |
7117c2d2 | 256 | static char *variable_remove_pattern __P((char *, char *, int, int)); |
f73dda09 | 257 | static char *list_remove_pattern __P((WORD_LIST *, char *, int, int, int)); |
7117c2d2 | 258 | static char *parameter_list_remove_pattern __P((int, char *, int, int)); |
f73dda09 | 259 | #ifdef ARRAY_VARS |
3185942a | 260 | static char *array_remove_pattern __P((SHELL_VAR *, char *, int, char *, int)); |
f73dda09 | 261 | #endif |
7117c2d2 | 262 | static char *parameter_brace_remove_pattern __P((char *, char *, char *, int, int)); |
f73dda09 JA |
263 | |
264 | static char *process_substitute __P((char *, int)); | |
265 | ||
3185942a | 266 | static char *read_comsub __P((int, int, int *)); |
f73dda09 JA |
267 | |
268 | #ifdef ARRAY_VARS | |
269 | static arrayind_t array_length_reference __P((char *)); | |
270 | #endif | |
271 | ||
272 | static int valid_brace_expansion_word __P((char *, int)); | |
b80f6443 | 273 | static int chk_atstar __P((char *, int, int *, int *)); |
0628567a | 274 | static int chk_arithsub __P((const char *, int)); |
b80f6443 | 275 | |
89a92869 | 276 | static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int)); |
95732b49 JA |
277 | static WORD_DESC *parameter_brace_expand_indir __P((char *, int, int, int *, int *)); |
278 | static WORD_DESC *parameter_brace_expand_rhs __P((char *, char *, int, int, int *, int *)); | |
f73dda09 JA |
279 | static void parameter_brace_expand_error __P((char *, char *)); |
280 | ||
281 | static int valid_length_expression __P((char *)); | |
7117c2d2 | 282 | static intmax_t parameter_brace_expand_length __P((char *)); |
f73dda09 JA |
283 | |
284 | static char *skiparith __P((char *, int)); | |
3185942a | 285 | static int verify_substring_values __P((SHELL_VAR *, char *, char *, int, intmax_t *, intmax_t *)); |
b80f6443 JA |
286 | static int get_var_and_type __P((char *, char *, int, SHELL_VAR **, char **)); |
287 | static char *mb_substring __P((char *, int, int)); | |
f73dda09 JA |
288 | static char *parameter_brace_substring __P((char *, char *, char *, int)); |
289 | ||
290 | static char *pos_params_pat_subst __P((char *, char *, char *, int)); | |
291 | ||
292 | static char *parameter_brace_patsub __P((char *, char *, char *, int)); | |
293 | ||
3185942a JA |
294 | static char *pos_params_casemod __P((char *, char *, int, int)); |
295 | static char *parameter_brace_casemod __P((char *, char *, int, char *, int)); | |
296 | ||
0001803f | 297 | static WORD_DESC *parameter_brace_expand __P((char *, int *, int, int, int *, int *)); |
95732b49 | 298 | static WORD_DESC *param_expand __P((char *, int *, int, int *, int *, int *, int *, int)); |
f73dda09 JA |
299 | |
300 | static WORD_LIST *expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
301 | ||
f73dda09 JA |
302 | static WORD_LIST *word_list_split __P((WORD_LIST *)); |
303 | ||
b80f6443 JA |
304 | static void exp_jump_to_top_level __P((int)); |
305 | ||
f73dda09 JA |
306 | static WORD_LIST *separate_out_assignments __P((WORD_LIST *)); |
307 | static WORD_LIST *glob_expand_word_list __P((WORD_LIST *, int)); | |
308 | #ifdef BRACE_EXPANSION | |
309 | static WORD_LIST *brace_expand_word_list __P((WORD_LIST *, int)); | |
310 | #endif | |
3185942a JA |
311 | #if defined (ARRAY_VARS) |
312 | static int make_internal_declare __P((char *, char *)); | |
313 | #endif | |
f73dda09 JA |
314 | static WORD_LIST *shell_expand_word_list __P((WORD_LIST *, int)); |
315 | static WORD_LIST *expand_word_list_internal __P((WORD_LIST *, int)); | |
726f6388 JA |
316 | |
317 | /* **************************************************************** */ | |
318 | /* */ | |
319 | /* Utility Functions */ | |
320 | /* */ | |
321 | /* **************************************************************** */ | |
322 | ||
0001803f CR |
323 | #if defined (DEBUG) |
324 | void | |
325 | dump_word_flags (flags) | |
326 | int flags; | |
327 | { | |
328 | int f; | |
329 | ||
330 | f = flags; | |
331 | fprintf (stderr, "%d -> ", f); | |
332 | if (f & W_ASSIGNASSOC) | |
333 | { | |
334 | f &= ~W_ASSIGNASSOC; | |
335 | fprintf (stderr, "W_ASSIGNASSOC%s", f ? "|" : ""); | |
336 | } | |
337 | if (f & W_HASCTLESC) | |
338 | { | |
339 | f &= ~W_HASCTLESC; | |
340 | fprintf (stderr, "W_HASCTLESC%s", f ? "|" : ""); | |
341 | } | |
342 | if (f & W_NOPROCSUB) | |
343 | { | |
344 | f &= ~W_NOPROCSUB; | |
345 | fprintf (stderr, "W_NOPROCSUB%s", f ? "|" : ""); | |
346 | } | |
347 | if (f & W_DQUOTE) | |
348 | { | |
349 | f &= ~W_DQUOTE; | |
350 | fprintf (stderr, "W_DQUOTE%s", f ? "|" : ""); | |
351 | } | |
352 | if (f & W_HASQUOTEDNULL) | |
353 | { | |
354 | f &= ~W_HASQUOTEDNULL; | |
355 | fprintf (stderr, "W_HASQUOTEDNULL%s", f ? "|" : ""); | |
356 | } | |
357 | if (f & W_ASSIGNARG) | |
358 | { | |
359 | f &= ~W_ASSIGNARG; | |
360 | fprintf (stderr, "W_ASSIGNARG%s", f ? "|" : ""); | |
361 | } | |
362 | if (f & W_ASSNBLTIN) | |
363 | { | |
364 | f &= ~W_ASSNBLTIN; | |
365 | fprintf (stderr, "W_ASSNBLTIN%s", f ? "|" : ""); | |
366 | } | |
367 | if (f & W_COMPASSIGN) | |
368 | { | |
369 | f &= ~W_COMPASSIGN; | |
370 | fprintf (stderr, "W_COMPASSIGN%s", f ? "|" : ""); | |
371 | } | |
372 | if (f & W_NOEXPAND) | |
373 | { | |
374 | f &= ~W_NOEXPAND; | |
375 | fprintf (stderr, "W_NOEXPAND%s", f ? "|" : ""); | |
376 | } | |
377 | if (f & W_ITILDE) | |
378 | { | |
379 | f &= ~W_ITILDE; | |
380 | fprintf (stderr, "W_ITILDE%s", f ? "|" : ""); | |
381 | } | |
382 | if (f & W_NOTILDE) | |
383 | { | |
384 | f &= ~W_NOTILDE; | |
385 | fprintf (stderr, "W_NOTILDE%s", f ? "|" : ""); | |
386 | } | |
387 | if (f & W_ASSIGNRHS) | |
388 | { | |
389 | f &= ~W_ASSIGNRHS; | |
390 | fprintf (stderr, "W_ASSIGNRHS%s", f ? "|" : ""); | |
391 | } | |
392 | if (f & W_NOCOMSUB) | |
393 | { | |
394 | f &= ~W_NOCOMSUB; | |
395 | fprintf (stderr, "W_NOCOMSUB%s", f ? "|" : ""); | |
396 | } | |
397 | if (f & W_DOLLARSTAR) | |
398 | { | |
399 | f &= ~W_DOLLARSTAR; | |
400 | fprintf (stderr, "W_DOLLARSTAR%s", f ? "|" : ""); | |
401 | } | |
402 | if (f & W_DOLLARAT) | |
403 | { | |
404 | f &= ~W_DOLLARAT; | |
405 | fprintf (stderr, "W_DOLLARAT%s", f ? "|" : ""); | |
406 | } | |
407 | if (f & W_TILDEEXP) | |
408 | { | |
409 | f &= ~W_TILDEEXP; | |
410 | fprintf (stderr, "W_TILDEEXP%s", f ? "|" : ""); | |
411 | } | |
412 | if (f & W_NOSPLIT2) | |
413 | { | |
414 | f &= ~W_NOSPLIT2; | |
415 | fprintf (stderr, "W_NOSPLIT2%s", f ? "|" : ""); | |
416 | } | |
417 | if (f & W_NOGLOB) | |
418 | { | |
419 | f &= ~W_NOGLOB; | |
420 | fprintf (stderr, "W_NOGLOB%s", f ? "|" : ""); | |
421 | } | |
422 | if (f & W_NOSPLIT) | |
423 | { | |
424 | f &= ~W_NOSPLIT; | |
425 | fprintf (stderr, "W_NOSPLIT%s", f ? "|" : ""); | |
426 | } | |
427 | if (f & W_GLOBEXP) | |
428 | { | |
429 | f &= ~W_GLOBEXP; | |
430 | fprintf (stderr, "W_GLOBEXP%s", f ? "|" : ""); | |
431 | } | |
432 | if (f & W_ASSIGNMENT) | |
433 | { | |
434 | f &= ~W_ASSIGNMENT; | |
435 | fprintf (stderr, "W_ASSIGNMENT%s", f ? "|" : ""); | |
436 | } | |
437 | if (f & W_QUOTED) | |
438 | { | |
439 | f &= ~W_QUOTED; | |
440 | fprintf (stderr, "W_QUOTED%s", f ? "|" : ""); | |
441 | } | |
442 | if (f & W_HASDOLLAR) | |
443 | { | |
444 | f &= ~W_HASDOLLAR; | |
445 | fprintf (stderr, "W_HASDOLLAR%s", f ? "|" : ""); | |
446 | } | |
447 | fprintf (stderr, "\n"); | |
448 | fflush (stderr); | |
449 | } | |
450 | #endif | |
451 | ||
7117c2d2 | 452 | #ifdef INCLUDE_UNUSED |
ccc6cda3 JA |
453 | static char * |
454 | quoted_substring (string, start, end) | |
455 | char *string; | |
456 | int start, end; | |
457 | { | |
458 | register int len, l; | |
459 | register char *result, *s, *r; | |
460 | ||
461 | len = end - start; | |
462 | ||
463 | /* Move to string[start], skipping quoted characters. */ | |
464 | for (s = string, l = 0; *s && l < start; ) | |
465 | { | |
466 | if (*s == CTLESC) | |
467 | { | |
28ef6c31 JA |
468 | s++; |
469 | continue; | |
ccc6cda3 JA |
470 | } |
471 | l++; | |
472 | if (*s == 0) | |
28ef6c31 | 473 | break; |
ccc6cda3 JA |
474 | } |
475 | ||
f73dda09 | 476 | r = result = (char *)xmalloc (2*len + 1); /* save room for quotes */ |
ccc6cda3 JA |
477 | |
478 | /* Copy LEN characters, including quote characters. */ | |
479 | s = string + l; | |
480 | for (l = 0; l < len; s++) | |
481 | { | |
482 | if (*s == CTLESC) | |
28ef6c31 | 483 | *r++ = *s++; |
ccc6cda3 JA |
484 | *r++ = *s; |
485 | l++; | |
486 | if (*s == 0) | |
28ef6c31 | 487 | break; |
ccc6cda3 JA |
488 | } |
489 | *r = '\0'; | |
490 | return result; | |
491 | } | |
7117c2d2 JA |
492 | #endif |
493 | ||
494 | #ifdef INCLUDE_UNUSED | |
495 | /* Return the length of S, skipping over quoted characters */ | |
496 | static int | |
497 | quoted_strlen (s) | |
498 | char *s; | |
499 | { | |
500 | register char *p; | |
501 | int i; | |
502 | ||
503 | i = 0; | |
504 | for (p = s; *p; p++) | |
505 | { | |
506 | if (*p == CTLESC) | |
507 | { | |
508 | p++; | |
509 | if (*p == 0) | |
510 | return (i + 1); | |
511 | } | |
512 | i++; | |
513 | } | |
514 | ||
515 | return i; | |
516 | } | |
517 | #endif | |
ccc6cda3 JA |
518 | |
519 | /* Find the first occurrence of character C in string S, obeying shell | |
520 | quoting rules. If (FLAGS & ST_BACKSL) is non-zero, backslash-escaped | |
521 | characters are skipped. If (FLAGS & ST_CTLESC) is non-zero, characters | |
522 | escaped with CTLESC are skipped. */ | |
7117c2d2 | 523 | static char * |
ccc6cda3 JA |
524 | quoted_strchr (s, c, flags) |
525 | char *s; | |
526 | int c, flags; | |
527 | { | |
528 | register char *p; | |
529 | ||
530 | for (p = s; *p; p++) | |
531 | { | |
532 | if (((flags & ST_BACKSL) && *p == '\\') | |
533 | || ((flags & ST_CTLESC) && *p == CTLESC)) | |
534 | { | |
535 | p++; | |
536 | if (*p == '\0') | |
537 | return ((char *)NULL); | |
538 | continue; | |
539 | } | |
540 | else if (*p == c) | |
541 | return p; | |
542 | } | |
543 | return ((char *)NULL); | |
544 | } | |
545 | ||
cce855bc | 546 | /* Return 1 if CHARACTER appears in an unquoted portion of |
7117c2d2 | 547 | STRING. Return 0 otherwise. CHARACTER must be a single-byte character. */ |
cce855bc JA |
548 | static int |
549 | unquoted_member (character, string) | |
550 | int character; | |
726f6388 JA |
551 | char *string; |
552 | { | |
7117c2d2 | 553 | size_t slen; |
cce855bc | 554 | int sindex, c; |
7117c2d2 | 555 | DECLARE_MBSTATE; |
726f6388 | 556 | |
7117c2d2 JA |
557 | slen = strlen (string); |
558 | sindex = 0; | |
559 | while (c = string[sindex]) | |
726f6388 | 560 | { |
cce855bc JA |
561 | if (c == character) |
562 | return (1); | |
563 | ||
564 | switch (c) | |
ccc6cda3 | 565 | { |
cce855bc | 566 | default: |
7117c2d2 | 567 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
568 | break; |
569 | ||
570 | case '\\': | |
571 | sindex++; | |
572 | if (string[sindex]) | |
7117c2d2 | 573 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
574 | break; |
575 | ||
576 | case '\'': | |
7117c2d2 | 577 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
578 | break; |
579 | ||
580 | case '"': | |
7117c2d2 | 581 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc | 582 | break; |
ccc6cda3 | 583 | } |
726f6388 | 584 | } |
cce855bc | 585 | return (0); |
726f6388 JA |
586 | } |
587 | ||
cce855bc JA |
588 | /* Return 1 if SUBSTR appears in an unquoted portion of STRING. */ |
589 | static int | |
590 | unquoted_substring (substr, string) | |
591 | char *substr, *string; | |
726f6388 | 592 | { |
7117c2d2 | 593 | size_t slen; |
cce855bc | 594 | int sindex, c, sublen; |
7117c2d2 | 595 | DECLARE_MBSTATE; |
726f6388 | 596 | |
cce855bc JA |
597 | if (substr == 0 || *substr == '\0') |
598 | return (0); | |
599 | ||
7117c2d2 | 600 | slen = strlen (string); |
cce855bc JA |
601 | sublen = strlen (substr); |
602 | for (sindex = 0; c = string[sindex]; ) | |
726f6388 | 603 | { |
cce855bc JA |
604 | if (STREQN (string + sindex, substr, sublen)) |
605 | return (1); | |
606 | ||
607 | switch (c) | |
608 | { | |
609 | case '\\': | |
610 | sindex++; | |
611 | ||
612 | if (string[sindex]) | |
7117c2d2 | 613 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
614 | break; |
615 | ||
616 | case '\'': | |
7117c2d2 | 617 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
618 | break; |
619 | ||
620 | case '"': | |
7117c2d2 | 621 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc JA |
622 | break; |
623 | ||
624 | default: | |
7117c2d2 | 625 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
626 | break; |
627 | } | |
726f6388 | 628 | } |
cce855bc | 629 | return (0); |
ccc6cda3 | 630 | } |
726f6388 | 631 | |
cce855bc JA |
632 | /* Most of the substitutions must be done in parallel. In order |
633 | to avoid using tons of unclear goto's, I have some functions | |
634 | for manipulating malloc'ed strings. They all take INDX, a | |
635 | pointer to an integer which is the offset into the string | |
636 | where manipulation is taking place. They also take SIZE, a | |
637 | pointer to an integer which is the current length of the | |
638 | character array for this string. */ | |
726f6388 | 639 | |
cce855bc JA |
640 | /* Append SOURCE to TARGET at INDEX. SIZE is the current amount |
641 | of space allocated to TARGET. SOURCE can be NULL, in which | |
642 | case nothing happens. Gets rid of SOURCE by freeing it. | |
643 | Returns TARGET in case the location has changed. */ | |
7117c2d2 | 644 | INLINE char * |
cce855bc JA |
645 | sub_append_string (source, target, indx, size) |
646 | char *source, *target; | |
647 | int *indx, *size; | |
648 | { | |
649 | if (source) | |
726f6388 | 650 | { |
cce855bc JA |
651 | int srclen, n; |
652 | ||
653 | srclen = STRLEN (source); | |
654 | if (srclen >= (int)(*size - *indx)) | |
726f6388 | 655 | { |
cce855bc JA |
656 | n = srclen + *indx; |
657 | n = (n + DEFAULT_ARRAY_SIZE) - (n % DEFAULT_ARRAY_SIZE); | |
f73dda09 | 658 | target = (char *)xrealloc (target, (*size = n)); |
726f6388 | 659 | } |
cce855bc JA |
660 | |
661 | FASTCOPY (source, target + *indx, srclen); | |
662 | *indx += srclen; | |
663 | target[*indx] = '\0'; | |
664 | ||
665 | free (source); | |
726f6388 | 666 | } |
cce855bc JA |
667 | return (target); |
668 | } | |
669 | ||
670 | #if 0 | |
671 | /* UNUSED */ | |
672 | /* Append the textual representation of NUMBER to TARGET. | |
673 | INDX and SIZE are as in SUB_APPEND_STRING. */ | |
674 | char * | |
675 | sub_append_number (number, target, indx, size) | |
7117c2d2 | 676 | intmax_t number; |
f73dda09 | 677 | int *indx, *size; |
cce855bc JA |
678 | char *target; |
679 | { | |
680 | char *temp; | |
681 | ||
682 | temp = itos (number); | |
683 | return (sub_append_string (temp, target, indx, size)); | |
726f6388 | 684 | } |
d166f048 | 685 | #endif |
726f6388 JA |
686 | |
687 | /* Extract a substring from STRING, starting at SINDEX and ending with | |
688 | one of the characters in CHARLIST. Don't make the ending character | |
689 | part of the string. Leave SINDEX pointing at the ending character. | |
3185942a | 690 | Understand about backslashes in the string. If (flags & SX_VARNAME) |
7117c2d2 JA |
691 | is non-zero, and array variables have been compiled into the shell, |
692 | everything between a `[' and a corresponding `]' is skipped over. | |
3185942a JA |
693 | If (flags & SX_NOALLOC) is non-zero, don't return the substring, just |
694 | update SINDEX. If (flags & SX_REQMATCH) is non-zero, the string must | |
95732b49 | 695 | contain a closing character from CHARLIST. */ |
726f6388 | 696 | static char * |
7117c2d2 | 697 | string_extract (string, sindex, charlist, flags) |
f73dda09 JA |
698 | char *string; |
699 | int *sindex; | |
700 | char *charlist; | |
7117c2d2 | 701 | int flags; |
726f6388 | 702 | { |
ccc6cda3 | 703 | register int c, i; |
95732b49 | 704 | int found; |
7117c2d2 | 705 | size_t slen; |
726f6388 | 706 | char *temp; |
7117c2d2 | 707 | DECLARE_MBSTATE; |
726f6388 | 708 | |
95732b49 | 709 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; |
7117c2d2 | 710 | i = *sindex; |
95732b49 | 711 | found = 0; |
7117c2d2 | 712 | while (c = string[i]) |
726f6388 JA |
713 | { |
714 | if (c == '\\') | |
7117c2d2 JA |
715 | { |
716 | if (string[i + 1]) | |
717 | i++; | |
718 | else | |
719 | break; | |
720 | } | |
ccc6cda3 | 721 | #if defined (ARRAY_VARS) |
3185942a | 722 | else if ((flags & SX_VARNAME) && c == '[') |
ccc6cda3 JA |
723 | { |
724 | int ni; | |
725 | /* If this is an array subscript, skip over it and continue. */ | |
0001803f | 726 | ni = skipsubscript (string, i, 0); |
ccc6cda3 JA |
727 | if (string[ni] == ']') |
728 | i = ni; | |
729 | } | |
730 | #endif | |
731 | else if (MEMBER (c, charlist)) | |
95732b49 JA |
732 | { |
733 | found = 1; | |
726f6388 | 734 | break; |
95732b49 | 735 | } |
7117c2d2 JA |
736 | |
737 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 738 | } |
bb70624e | 739 | |
95732b49 JA |
740 | /* If we had to have a matching delimiter and didn't find one, return an |
741 | error and let the caller deal with it. */ | |
3185942a | 742 | if ((flags & SX_REQMATCH) && found == 0) |
95732b49 JA |
743 | { |
744 | *sindex = i; | |
745 | return (&extract_string_error); | |
746 | } | |
747 | ||
3185942a | 748 | temp = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 | 749 | *sindex = i; |
95732b49 | 750 | |
726f6388 JA |
751 | return (temp); |
752 | } | |
753 | ||
ccc6cda3 JA |
754 | /* Extract the contents of STRING as if it is enclosed in double quotes. |
755 | SINDEX, when passed in, is the offset of the character immediately | |
756 | following the opening double quote; on exit, SINDEX is left pointing after | |
757 | the closing double quote. If STRIPDQ is non-zero, unquoted double | |
758 | quotes are stripped and the string is terminated by a null byte. | |
759 | Backslashes between the embedded double quotes are processed. If STRIPDQ | |
760 | is zero, an unquoted `"' terminates the string. */ | |
7117c2d2 | 761 | static char * |
ccc6cda3 | 762 | string_extract_double_quoted (string, sindex, stripdq) |
726f6388 | 763 | char *string; |
ccc6cda3 | 764 | int *sindex, stripdq; |
726f6388 | 765 | { |
7117c2d2 JA |
766 | size_t slen; |
767 | char *send; | |
f73dda09 JA |
768 | int j, i, t; |
769 | unsigned char c; | |
ccc6cda3 JA |
770 | char *temp, *ret; /* The new string we return. */ |
771 | int pass_next, backquote, si; /* State variables for the machine. */ | |
772 | int dquote; | |
7117c2d2 JA |
773 | DECLARE_MBSTATE; |
774 | ||
775 | slen = strlen (string + *sindex) + *sindex; | |
776 | send = string + slen; | |
726f6388 | 777 | |
ccc6cda3 | 778 | pass_next = backquote = dquote = 0; |
7117c2d2 | 779 | temp = (char *)xmalloc (1 + slen - *sindex); |
726f6388 | 780 | |
7117c2d2 JA |
781 | j = 0; |
782 | i = *sindex; | |
783 | while (c = string[i]) | |
726f6388 | 784 | { |
ccc6cda3 JA |
785 | /* Process a character that was quoted by a backslash. */ |
786 | if (pass_next) | |
726f6388 | 787 | { |
ccc6cda3 | 788 | /* Posix.2 sez: |
726f6388 | 789 | |
ccc6cda3 JA |
790 | ``The backslash shall retain its special meaning as an escape |
791 | character only when followed by one of the characters: | |
7117c2d2 | 792 | $ ` " \ <newline>''. |
726f6388 | 793 | |
ccc6cda3 JA |
794 | If STRIPDQ is zero, we handle the double quotes here and let |
795 | expand_word_internal handle the rest. If STRIPDQ is non-zero, | |
796 | we have already been through one round of backslash stripping, | |
797 | and want to strip these backslashes only if DQUOTE is non-zero, | |
798 | indicating that we are inside an embedded double-quoted string. */ | |
799 | ||
800 | /* If we are in an embedded quoted string, then don't strip | |
801 | backslashes before characters for which the backslash | |
802 | retains its special meaning, but remove backslashes in | |
803 | front of other characters. If we are not in an | |
804 | embedded quoted string, don't strip backslashes at all. | |
805 | This mess is necessary because the string was already | |
806 | surrounded by double quotes (and sh has some really weird | |
807 | quoting rules). | |
808 | The returned string will be run through expansion as if | |
809 | it were double-quoted. */ | |
810 | if ((stripdq == 0 && c != '"') || | |
28ef6c31 | 811 | (stripdq && ((dquote && (sh_syntaxtab[c] & CBSDQUOTE)) || dquote == 0))) |
ccc6cda3 | 812 | temp[j++] = '\\'; |
ccc6cda3 | 813 | pass_next = 0; |
7117c2d2 JA |
814 | |
815 | add_one_character: | |
816 | COPY_CHAR_I (temp, j, string, send, i); | |
ccc6cda3 JA |
817 | continue; |
818 | } | |
726f6388 | 819 | |
ccc6cda3 JA |
820 | /* A backslash protects the next character. The code just above |
821 | handles preserving the backslash in front of any character but | |
822 | a double quote. */ | |
823 | if (c == '\\') | |
726f6388 | 824 | { |
ccc6cda3 | 825 | pass_next++; |
7117c2d2 | 826 | i++; |
726f6388 JA |
827 | continue; |
828 | } | |
829 | ||
ccc6cda3 JA |
830 | /* Inside backquotes, ``the portion of the quoted string from the |
831 | initial backquote and the characters up to the next backquote | |
832 | that is not preceded by a backslash, having escape characters | |
833 | removed, defines that command''. */ | |
834 | if (backquote) | |
726f6388 | 835 | { |
ccc6cda3 JA |
836 | if (c == '`') |
837 | backquote = 0; | |
838 | temp[j++] = c; | |
7117c2d2 | 839 | i++; |
726f6388 JA |
840 | continue; |
841 | } | |
842 | ||
ccc6cda3 | 843 | if (c == '`') |
726f6388 | 844 | { |
ccc6cda3 JA |
845 | temp[j++] = c; |
846 | backquote++; | |
7117c2d2 | 847 | i++; |
ccc6cda3 | 848 | continue; |
726f6388 JA |
849 | } |
850 | ||
ccc6cda3 JA |
851 | /* Pass everything between `$(' and the matching `)' or a quoted |
852 | ${ ... } pair through according to the Posix.2 specification. */ | |
cce855bc | 853 | if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
726f6388 | 854 | { |
b80f6443 JA |
855 | int free_ret = 1; |
856 | ||
ccc6cda3 | 857 | si = i + 2; |
cce855bc | 858 | if (string[i + 1] == LPAREN) |
3185942a | 859 | ret = extract_command_subst (string, &si, 0); |
ccc6cda3 | 860 | else |
7117c2d2 | 861 | ret = extract_dollar_brace_string (string, &si, 1, 0); |
726f6388 | 862 | |
ccc6cda3 JA |
863 | temp[j++] = '$'; |
864 | temp[j++] = string[i + 1]; | |
726f6388 | 865 | |
b80f6443 JA |
866 | /* Just paranoia; ret will not be 0 unless no_longjmp_on_fatal_error |
867 | is set. */ | |
868 | if (ret == 0 && no_longjmp_on_fatal_error) | |
869 | { | |
870 | free_ret = 0; | |
871 | ret = string + i + 2; | |
872 | } | |
873 | ||
ccc6cda3 JA |
874 | for (t = 0; ret[t]; t++, j++) |
875 | temp[j] = ret[t]; | |
b80f6443 | 876 | temp[j] = string[si]; |
726f6388 | 877 | |
b80f6443 JA |
878 | if (string[si]) |
879 | { | |
880 | j++; | |
881 | i = si + 1; | |
882 | } | |
883 | else | |
884 | i = si; | |
885 | ||
886 | if (free_ret) | |
887 | free (ret); | |
ccc6cda3 | 888 | continue; |
726f6388 JA |
889 | } |
890 | ||
ccc6cda3 | 891 | /* Add any character but a double quote to the quoted string we're |
28ef6c31 | 892 | accumulating. */ |
ccc6cda3 | 893 | if (c != '"') |
7117c2d2 | 894 | goto add_one_character; |
ccc6cda3 JA |
895 | |
896 | /* c == '"' */ | |
897 | if (stripdq) | |
726f6388 | 898 | { |
ccc6cda3 | 899 | dquote ^= 1; |
7117c2d2 | 900 | i++; |
ccc6cda3 | 901 | continue; |
726f6388 | 902 | } |
ccc6cda3 JA |
903 | |
904 | break; | |
726f6388 | 905 | } |
ccc6cda3 | 906 | temp[j] = '\0'; |
726f6388 | 907 | |
ccc6cda3 JA |
908 | /* Point to after the closing quote. */ |
909 | if (c) | |
910 | i++; | |
726f6388 JA |
911 | *sindex = i; |
912 | ||
ccc6cda3 JA |
913 | return (temp); |
914 | } | |
915 | ||
916 | /* This should really be another option to string_extract_double_quoted. */ | |
f73dda09 | 917 | static int |
7117c2d2 | 918 | skip_double_quoted (string, slen, sind) |
ccc6cda3 | 919 | char *string; |
7117c2d2 | 920 | size_t slen; |
ccc6cda3 JA |
921 | int sind; |
922 | { | |
f73dda09 | 923 | int c, i; |
ccc6cda3 JA |
924 | char *ret; |
925 | int pass_next, backquote, si; | |
7117c2d2 | 926 | DECLARE_MBSTATE; |
ccc6cda3 JA |
927 | |
928 | pass_next = backquote = 0; | |
7117c2d2 JA |
929 | i = sind; |
930 | while (c = string[i]) | |
726f6388 | 931 | { |
ccc6cda3 JA |
932 | if (pass_next) |
933 | { | |
934 | pass_next = 0; | |
7117c2d2 | 935 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
936 | continue; |
937 | } | |
938 | else if (c == '\\') | |
939 | { | |
940 | pass_next++; | |
7117c2d2 | 941 | i++; |
ccc6cda3 JA |
942 | continue; |
943 | } | |
944 | else if (backquote) | |
945 | { | |
946 | if (c == '`') | |
947 | backquote = 0; | |
7117c2d2 | 948 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
949 | continue; |
950 | } | |
951 | else if (c == '`') | |
952 | { | |
953 | backquote++; | |
7117c2d2 | 954 | i++; |
ccc6cda3 JA |
955 | continue; |
956 | } | |
cce855bc | 957 | else if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
ccc6cda3 JA |
958 | { |
959 | si = i + 2; | |
cce855bc | 960 | if (string[i + 1] == LPAREN) |
3185942a | 961 | ret = extract_command_subst (string, &si, SX_NOALLOC); |
ccc6cda3 | 962 | else |
3185942a | 963 | ret = extract_dollar_brace_string (string, &si, 1, SX_NOALLOC); |
ccc6cda3 | 964 | |
7117c2d2 | 965 | i = si + 1; |
ccc6cda3 JA |
966 | continue; |
967 | } | |
968 | else if (c != '"') | |
7117c2d2 JA |
969 | { |
970 | ADVANCE_CHAR (string, slen, i); | |
971 | continue; | |
972 | } | |
ccc6cda3 JA |
973 | else |
974 | break; | |
726f6388 | 975 | } |
ccc6cda3 JA |
976 | |
977 | if (c) | |
978 | i++; | |
979 | ||
980 | return (i); | |
726f6388 JA |
981 | } |
982 | ||
ccc6cda3 JA |
983 | /* Extract the contents of STRING as if it is enclosed in single quotes. |
984 | SINDEX, when passed in, is the offset of the character immediately | |
985 | following the opening single quote; on exit, SINDEX is left pointing after | |
986 | the closing single quote. */ | |
987 | static inline char * | |
988 | string_extract_single_quoted (string, sindex) | |
989 | char *string; | |
990 | int *sindex; | |
991 | { | |
f73dda09 | 992 | register int i; |
7117c2d2 | 993 | size_t slen; |
ccc6cda3 | 994 | char *t; |
7117c2d2 | 995 | DECLARE_MBSTATE; |
ccc6cda3 | 996 | |
95732b49 JA |
997 | /* Don't need slen for ADVANCE_CHAR unless multibyte chars possible. */ |
998 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; | |
7117c2d2 JA |
999 | i = *sindex; |
1000 | while (string[i] && string[i] != '\'') | |
1001 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 | 1002 | |
bb70624e | 1003 | t = substring (string, *sindex, i); |
ccc6cda3 JA |
1004 | |
1005 | if (string[i]) | |
1006 | i++; | |
1007 | *sindex = i; | |
1008 | ||
1009 | return (t); | |
1010 | } | |
1011 | ||
1012 | static inline int | |
7117c2d2 | 1013 | skip_single_quoted (string, slen, sind) |
0628567a | 1014 | const char *string; |
7117c2d2 | 1015 | size_t slen; |
ccc6cda3 JA |
1016 | int sind; |
1017 | { | |
28ef6c31 | 1018 | register int c; |
7117c2d2 JA |
1019 | DECLARE_MBSTATE; |
1020 | ||
1021 | c = sind; | |
1022 | while (string[c] && string[c] != '\'') | |
1023 | ADVANCE_CHAR (string, slen, c); | |
ccc6cda3 | 1024 | |
28ef6c31 JA |
1025 | if (string[c]) |
1026 | c++; | |
1027 | return c; | |
ccc6cda3 JA |
1028 | } |
1029 | ||
1030 | /* Just like string_extract, but doesn't hack backslashes or any of | |
bb70624e | 1031 | that other stuff. Obeys CTLESC quoting. Used to do splitting on $IFS. */ |
726f6388 | 1032 | static char * |
3185942a | 1033 | string_extract_verbatim (string, slen, sindex, charlist, flags) |
f73dda09 | 1034 | char *string; |
95732b49 | 1035 | size_t slen; |
ccc6cda3 | 1036 | int *sindex; |
f73dda09 | 1037 | char *charlist; |
3185942a | 1038 | int flags; |
ccc6cda3 | 1039 | { |
0001803f | 1040 | register int i; |
95732b49 JA |
1041 | #if defined (HANDLE_MULTIBYTE) |
1042 | size_t clen; | |
1043 | wchar_t *wcharlist; | |
1044 | #endif | |
ccc6cda3 JA |
1045 | int c; |
1046 | char *temp; | |
95732b49 | 1047 | DECLARE_MBSTATE; |
ccc6cda3 JA |
1048 | |
1049 | if (charlist[0] == '\'' && charlist[1] == '\0') | |
1050 | { | |
1051 | temp = string_extract_single_quoted (string, sindex); | |
1052 | --*sindex; /* leave *sindex at separator character */ | |
1053 | return temp; | |
1054 | } | |
1055 | ||
95732b49 JA |
1056 | i = *sindex; |
1057 | #if 0 | |
1058 | /* See how the MBLEN and ADVANCE_CHAR macros work to understand why we need | |
1059 | this only if MB_CUR_MAX > 1. */ | |
1060 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 1; | |
1061 | #endif | |
1062 | #if defined (HANDLE_MULTIBYTE) | |
1063 | clen = strlen (charlist); | |
1064 | wcharlist = 0; | |
1065 | #endif | |
1066 | while (c = string[i]) | |
ccc6cda3 | 1067 | { |
95732b49 JA |
1068 | #if defined (HANDLE_MULTIBYTE) |
1069 | size_t mblength; | |
1070 | #endif | |
3185942a JA |
1071 | if ((flags & SX_NOCTLESC) == 0 && c == CTLESC) |
1072 | { | |
1073 | i += 2; | |
1074 | continue; | |
1075 | } | |
1076 | /* Even if flags contains SX_NOCTLESC, we let CTLESC quoting CTLNUL | |
1077 | through, to protect the CTLNULs from later calls to | |
1078 | remove_quoted_nulls. */ | |
1079 | else if ((flags & SX_NOESCCTLNUL) == 0 && c == CTLESC && string[i+1] == CTLNUL) | |
ccc6cda3 | 1080 | { |
95732b49 | 1081 | i += 2; |
ccc6cda3 JA |
1082 | continue; |
1083 | } | |
1084 | ||
95732b49 JA |
1085 | #if defined (HANDLE_MULTIBYTE) |
1086 | mblength = MBLEN (string + i, slen - i); | |
1087 | if (mblength > 1) | |
1088 | { | |
1089 | wchar_t wc; | |
1090 | mblength = mbtowc (&wc, string + i, slen - i); | |
1091 | if (MB_INVALIDCH (mblength)) | |
1092 | { | |
1093 | if (MEMBER (c, charlist)) | |
1094 | break; | |
1095 | } | |
1096 | else | |
1097 | { | |
1098 | if (wcharlist == 0) | |
1099 | { | |
1100 | size_t len; | |
1101 | len = mbstowcs (wcharlist, charlist, 0); | |
1102 | if (len == -1) | |
1103 | len = 0; | |
0628567a JA |
1104 | wcharlist = (wchar_t *)xmalloc (sizeof (wchar_t) * (len + 1)); |
1105 | mbstowcs (wcharlist, charlist, len + 1); | |
95732b49 JA |
1106 | } |
1107 | ||
1108 | if (wcschr (wcharlist, wc)) | |
1109 | break; | |
1110 | } | |
1111 | } | |
1112 | else | |
1113 | #endif | |
ccc6cda3 JA |
1114 | if (MEMBER (c, charlist)) |
1115 | break; | |
95732b49 JA |
1116 | |
1117 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 JA |
1118 | } |
1119 | ||
95732b49 JA |
1120 | #if defined (HANDLE_MULTIBYTE) |
1121 | FREE (wcharlist); | |
1122 | #endif | |
1123 | ||
bb70624e | 1124 | temp = substring (string, *sindex, i); |
ccc6cda3 JA |
1125 | *sindex = i; |
1126 | ||
1127 | return (temp); | |
1128 | } | |
1129 | ||
1130 | /* Extract the $( construct in STRING, and return a new string. | |
1131 | Start extracting at (SINDEX) as if we had just seen "$(". | |
3185942a | 1132 | Make (SINDEX) get the position of the matching ")". ) |
0001803f | 1133 | XFLAGS is additional flags to pass to other extraction functions. */ |
ccc6cda3 | 1134 | char * |
3185942a | 1135 | extract_command_subst (string, sindex, xflags) |
726f6388 JA |
1136 | char *string; |
1137 | int *sindex; | |
3185942a | 1138 | int xflags; |
726f6388 | 1139 | { |
0001803f | 1140 | if (string[*sindex] == LPAREN) |
3185942a JA |
1141 | return (extract_delimited_string (string, sindex, "$(", "(", ")", xflags|SX_COMMAND)); /*)*/ |
1142 | else | |
1143 | { | |
1144 | xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0); | |
1145 | return (xparse_dolparen (string, string+*sindex, sindex, xflags)); | |
1146 | } | |
ccc6cda3 JA |
1147 | } |
1148 | ||
28ef6c31 | 1149 | /* Extract the $[ construct in STRING, and return a new string. (]) |
ccc6cda3 JA |
1150 | Start extracting at (SINDEX) as if we had just seen "$[". |
1151 | Make (SINDEX) get the position of the matching "]". */ | |
1152 | char * | |
1153 | extract_arithmetic_subst (string, sindex) | |
1154 | char *string; | |
1155 | int *sindex; | |
1156 | { | |
7117c2d2 | 1157 | return (extract_delimited_string (string, sindex, "$[", "[", "]", 0)); /*]*/ |
ccc6cda3 JA |
1158 | } |
1159 | ||
1160 | #if defined (PROCESS_SUBSTITUTION) | |
1161 | /* Extract the <( or >( construct in STRING, and return a new string. | |
1162 | Start extracting at (SINDEX) as if we had just seen "<(". | |
cce855bc | 1163 | Make (SINDEX) get the position of the matching ")". */ /*))*/ |
ccc6cda3 JA |
1164 | char * |
1165 | extract_process_subst (string, starter, sindex) | |
1166 | char *string; | |
1167 | char *starter; | |
1168 | int *sindex; | |
1169 | { | |
7117c2d2 | 1170 | return (extract_delimited_string (string, sindex, starter, "(", ")", 0)); |
ccc6cda3 JA |
1171 | } |
1172 | #endif /* PROCESS_SUBSTITUTION */ | |
1173 | ||
1174 | #if defined (ARRAY_VARS) | |
95732b49 JA |
1175 | /* This can be fooled by unquoted right parens in the passed string. If |
1176 | each caller verifies that the last character in STRING is a right paren, | |
1177 | we don't even need to call extract_delimited_string. */ | |
ccc6cda3 JA |
1178 | char * |
1179 | extract_array_assignment_list (string, sindex) | |
1180 | char *string; | |
1181 | int *sindex; | |
1182 | { | |
95732b49 JA |
1183 | int slen; |
1184 | char *ret; | |
1185 | ||
1186 | slen = strlen (string); /* ( */ | |
1187 | if (string[slen - 1] == ')') | |
1188 | { | |
1189 | ret = substring (string, *sindex, slen - 1); | |
1190 | *sindex = slen - 1; | |
1191 | return ret; | |
1192 | } | |
1193 | return 0; | |
ccc6cda3 JA |
1194 | } |
1195 | #endif | |
1196 | ||
1197 | /* Extract and create a new string from the contents of STRING, a | |
1198 | character string delimited with OPENER and CLOSER. SINDEX is | |
1199 | the address of an int describing the current offset in STRING; | |
1200 | it should point to just after the first OPENER found. On exit, | |
1201 | SINDEX gets the position of the last character of the matching CLOSER. | |
1202 | If OPENER is more than a single character, ALT_OPENER, if non-null, | |
1203 | contains a character string that can also match CLOSER and thus | |
1204 | needs to be skipped. */ | |
1205 | static char * | |
7117c2d2 | 1206 | extract_delimited_string (string, sindex, opener, alt_opener, closer, flags) |
ccc6cda3 JA |
1207 | char *string; |
1208 | int *sindex; | |
1209 | char *opener, *alt_opener, *closer; | |
7117c2d2 | 1210 | int flags; |
ccc6cda3 JA |
1211 | { |
1212 | int i, c, si; | |
7117c2d2 | 1213 | size_t slen; |
ccc6cda3 | 1214 | char *t, *result; |
0628567a | 1215 | int pass_character, nesting_level, in_comment; |
ccc6cda3 | 1216 | int len_closer, len_opener, len_alt_opener; |
7117c2d2 | 1217 | DECLARE_MBSTATE; |
ccc6cda3 | 1218 | |
7117c2d2 | 1219 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 JA |
1220 | len_opener = STRLEN (opener); |
1221 | len_alt_opener = STRLEN (alt_opener); | |
1222 | len_closer = STRLEN (closer); | |
726f6388 | 1223 | |
0628567a | 1224 | pass_character = in_comment = 0; |
726f6388 JA |
1225 | |
1226 | nesting_level = 1; | |
ccc6cda3 | 1227 | i = *sindex; |
726f6388 | 1228 | |
ccc6cda3 | 1229 | while (nesting_level) |
726f6388 | 1230 | { |
ccc6cda3 JA |
1231 | c = string[i]; |
1232 | ||
1233 | if (c == 0) | |
28ef6c31 | 1234 | break; |
ccc6cda3 | 1235 | |
0628567a JA |
1236 | if (in_comment) |
1237 | { | |
1238 | if (c == '\n') | |
1239 | in_comment = 0; | |
1240 | ADVANCE_CHAR (string, slen, i); | |
1241 | continue; | |
1242 | } | |
1243 | ||
ccc6cda3 | 1244 | if (pass_character) /* previous char was backslash */ |
726f6388 JA |
1245 | { |
1246 | pass_character = 0; | |
7117c2d2 | 1247 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1248 | continue; |
1249 | } | |
1250 | ||
0628567a | 1251 | /* Not exactly right yet; should handle shell metacharacters and |
0001803f | 1252 | multibyte characters, too. See COMMENT_BEGIN define in parse.y */ |
3185942a | 1253 | if ((flags & SX_COMMAND) && c == '#' && (i == 0 || string[i - 1] == '\n' || shellblank (string[i - 1]))) |
0628567a JA |
1254 | { |
1255 | in_comment = 1; | |
1256 | ADVANCE_CHAR (string, slen, i); | |
1257 | continue; | |
1258 | } | |
1259 | ||
7117c2d2 | 1260 | if (c == CTLESC || c == '\\') |
726f6388 | 1261 | { |
ccc6cda3 JA |
1262 | pass_character++; |
1263 | i++; | |
1264 | continue; | |
726f6388 JA |
1265 | } |
1266 | ||
0001803f CR |
1267 | #if 0 |
1268 | /* Process a nested command substitution, but only if we're parsing a | |
1269 | command substitution. XXX - for bash-4.2 */ | |
1270 | if ((flags & SX_COMMAND) && string[i] == '$' && string[i+1] == LPAREN) | |
1271 | { | |
1272 | si = i + 2; | |
1273 | t = extract_command_subst (string, &si, flags); | |
1274 | i = si + 1; | |
1275 | continue; | |
1276 | } | |
1277 | #endif | |
1278 | ||
ccc6cda3 JA |
1279 | /* Process a nested OPENER. */ |
1280 | if (STREQN (string + i, opener, len_opener)) | |
726f6388 | 1281 | { |
ccc6cda3 | 1282 | si = i + len_opener; |
3185942a | 1283 | t = extract_delimited_string (string, &si, opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1284 | i = si + 1; |
ccc6cda3 | 1285 | continue; |
726f6388 JA |
1286 | } |
1287 | ||
ccc6cda3 JA |
1288 | /* Process a nested ALT_OPENER */ |
1289 | if (len_alt_opener && STREQN (string + i, alt_opener, len_alt_opener)) | |
726f6388 | 1290 | { |
ccc6cda3 | 1291 | si = i + len_alt_opener; |
3185942a | 1292 | t = extract_delimited_string (string, &si, alt_opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1293 | i = si + 1; |
726f6388 JA |
1294 | continue; |
1295 | } | |
ccc6cda3 JA |
1296 | |
1297 | /* If the current substring terminates the delimited string, decrement | |
1298 | the nesting level. */ | |
1299 | if (STREQN (string + i, closer, len_closer)) | |
726f6388 | 1300 | { |
7117c2d2 | 1301 | i += len_closer - 1; /* move to last byte of the closer */ |
ccc6cda3 JA |
1302 | nesting_level--; |
1303 | if (nesting_level == 0) | |
1304 | break; | |
726f6388 | 1305 | } |
ccc6cda3 JA |
1306 | |
1307 | /* Pass old-style command substitution through verbatim. */ | |
1308 | if (c == '`') | |
28ef6c31 JA |
1309 | { |
1310 | si = i + 1; | |
3185942a | 1311 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
28ef6c31 | 1312 | i = si + 1; |
28ef6c31 JA |
1313 | continue; |
1314 | } | |
ccc6cda3 | 1315 | |
7117c2d2 JA |
1316 | /* Pass single-quoted and double-quoted strings through verbatim. */ |
1317 | if (c == '\'' || c == '"') | |
28ef6c31 JA |
1318 | { |
1319 | si = i + 1; | |
7117c2d2 JA |
1320 | i = (c == '\'') ? skip_single_quoted (string, slen, si) |
1321 | : skip_double_quoted (string, slen, si); | |
28ef6c31 JA |
1322 | continue; |
1323 | } | |
ccc6cda3 | 1324 | |
7117c2d2 JA |
1325 | /* move past this character, which was not special. */ |
1326 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1327 | } |
1328 | ||
b80f6443 | 1329 | if (c == 0 && nesting_level) |
726f6388 | 1330 | { |
b80f6443 JA |
1331 | if (no_longjmp_on_fatal_error == 0) |
1332 | { | |
1333 | report_error (_("bad substitution: no closing `%s' in %s"), closer, string); | |
1334 | last_command_exit_value = EXECUTION_FAILURE; | |
1335 | exp_jump_to_top_level (DISCARD); | |
1336 | } | |
1337 | else | |
1338 | { | |
1339 | *sindex = i; | |
1340 | return (char *)NULL; | |
1341 | } | |
726f6388 | 1342 | } |
ccc6cda3 | 1343 | |
cce855bc | 1344 | si = i - *sindex - len_closer + 1; |
3185942a | 1345 | if (flags & SX_NOALLOC) |
7117c2d2 JA |
1346 | result = (char *)NULL; |
1347 | else | |
1348 | { | |
1349 | result = (char *)xmalloc (1 + si); | |
1350 | strncpy (result, string + *sindex, si); | |
1351 | result[si] = '\0'; | |
1352 | } | |
cce855bc JA |
1353 | *sindex = i; |
1354 | ||
726f6388 JA |
1355 | return (result); |
1356 | } | |
1357 | ||
ccc6cda3 JA |
1358 | /* Extract a parameter expansion expression within ${ and } from STRING. |
1359 | Obey the Posix.2 rules for finding the ending `}': count braces while | |
1360 | skipping over enclosed quoted strings and command substitutions. | |
1361 | SINDEX is the address of an int describing the current offset in STRING; | |
1362 | it should point to just after the first `{' found. On exit, SINDEX | |
1363 | gets the position of the matching `}'. QUOTED is non-zero if this | |
1364 | occurs inside double quotes. */ | |
1365 | /* XXX -- this is very similar to extract_delimited_string -- XXX */ | |
726f6388 | 1366 | static char * |
7117c2d2 | 1367 | extract_dollar_brace_string (string, sindex, quoted, flags) |
726f6388 | 1368 | char *string; |
7117c2d2 | 1369 | int *sindex, quoted, flags; |
726f6388 | 1370 | { |
f73dda09 | 1371 | register int i, c; |
7117c2d2 | 1372 | size_t slen; |
ccc6cda3 JA |
1373 | int pass_character, nesting_level, si; |
1374 | char *result, *t; | |
7117c2d2 | 1375 | DECLARE_MBSTATE; |
726f6388 | 1376 | |
ccc6cda3 | 1377 | pass_character = 0; |
ccc6cda3 | 1378 | nesting_level = 1; |
7117c2d2 | 1379 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 | 1380 | |
7117c2d2 JA |
1381 | i = *sindex; |
1382 | while (c = string[i]) | |
726f6388 | 1383 | { |
ccc6cda3 | 1384 | if (pass_character) |
726f6388 | 1385 | { |
ccc6cda3 | 1386 | pass_character = 0; |
7117c2d2 | 1387 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
1388 | continue; |
1389 | } | |
726f6388 | 1390 | |
cce855bc JA |
1391 | /* CTLESCs and backslashes quote the next character. */ |
1392 | if (c == CTLESC || c == '\\') | |
726f6388 | 1393 | { |
ccc6cda3 | 1394 | pass_character++; |
7117c2d2 | 1395 | i++; |
726f6388 JA |
1396 | continue; |
1397 | } | |
1398 | ||
cce855bc | 1399 | if (string[i] == '$' && string[i+1] == LBRACE) |
726f6388 | 1400 | { |
ccc6cda3 | 1401 | nesting_level++; |
7117c2d2 | 1402 | i += 2; |
726f6388 JA |
1403 | continue; |
1404 | } | |
1405 | ||
cce855bc | 1406 | if (c == RBRACE) |
726f6388 | 1407 | { |
ccc6cda3 JA |
1408 | nesting_level--; |
1409 | if (nesting_level == 0) | |
1410 | break; | |
7117c2d2 | 1411 | i++; |
726f6388 JA |
1412 | continue; |
1413 | } | |
1414 | ||
ccc6cda3 JA |
1415 | /* Pass the contents of old-style command substitutions through |
1416 | verbatim. */ | |
1417 | if (c == '`') | |
726f6388 | 1418 | { |
ccc6cda3 | 1419 | si = i + 1; |
3185942a | 1420 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
7117c2d2 | 1421 | i = si + 1; |
ccc6cda3 JA |
1422 | continue; |
1423 | } | |
726f6388 | 1424 | |
cce855bc JA |
1425 | /* Pass the contents of new-style command substitutions and |
1426 | arithmetic substitutions through verbatim. */ | |
1427 | if (string[i] == '$' && string[i+1] == LPAREN) | |
ccc6cda3 | 1428 | { |
726f6388 | 1429 | si = i + 2; |
3185942a | 1430 | t = extract_command_subst (string, &si, flags|SX_NOALLOC); |
7117c2d2 | 1431 | i = si + 1; |
726f6388 JA |
1432 | continue; |
1433 | } | |
1434 | ||
cce855bc JA |
1435 | /* Pass the contents of single-quoted and double-quoted strings |
1436 | through verbatim. */ | |
1437 | if (c == '\'' || c == '"') | |
ccc6cda3 JA |
1438 | { |
1439 | si = i + 1; | |
7117c2d2 JA |
1440 | i = (c == '\'') ? skip_single_quoted (string, slen, si) |
1441 | : skip_double_quoted (string, slen, si); | |
cce855bc | 1442 | /* skip_XXX_quoted leaves index one past close quote */ |
ccc6cda3 JA |
1443 | continue; |
1444 | } | |
7117c2d2 JA |
1445 | |
1446 | /* move past this character, which was not special. */ | |
1447 | ADVANCE_CHAR (string, slen, i); | |
cce855bc | 1448 | } |
726f6388 | 1449 | |
b80f6443 | 1450 | if (c == 0 && nesting_level) |
cce855bc | 1451 | { |
b80f6443 JA |
1452 | if (no_longjmp_on_fatal_error == 0) |
1453 | { /* { */ | |
f1be666c | 1454 | report_error (_("bad substitution: no closing `%s' in %s"), "}", string); |
b80f6443 JA |
1455 | last_command_exit_value = EXECUTION_FAILURE; |
1456 | exp_jump_to_top_level (DISCARD); | |
1457 | } | |
1458 | else | |
1459 | { | |
1460 | *sindex = i; | |
1461 | return ((char *)NULL); | |
1462 | } | |
726f6388 | 1463 | } |
726f6388 | 1464 | |
3185942a | 1465 | result = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 JA |
1466 | *sindex = i; |
1467 | ||
ccc6cda3 | 1468 | return (result); |
726f6388 JA |
1469 | } |
1470 | ||
ccc6cda3 JA |
1471 | /* Remove backslashes which are quoting backquotes from STRING. Modifies |
1472 | STRING, and returns a pointer to it. */ | |
1473 | char * | |
1474 | de_backslash (string) | |
726f6388 | 1475 | char *string; |
ccc6cda3 | 1476 | { |
7117c2d2 JA |
1477 | register size_t slen; |
1478 | register int i, j, prev_i; | |
1479 | DECLARE_MBSTATE; | |
726f6388 | 1480 | |
7117c2d2 JA |
1481 | slen = strlen (string); |
1482 | i = j = 0; | |
1483 | ||
1484 | /* Loop copying string[i] to string[j], i >= j. */ | |
1485 | while (i < slen) | |
1486 | { | |
1487 | if (string[i] == '\\' && (string[i + 1] == '`' || string[i + 1] == '\\' || | |
ccc6cda3 | 1488 | string[i + 1] == '$')) |
7117c2d2 JA |
1489 | i++; |
1490 | prev_i = i; | |
1491 | ADVANCE_CHAR (string, slen, i); | |
1492 | if (j < prev_i) | |
b80f6443 | 1493 | do string[j++] = string[prev_i++]; while (prev_i < i); |
7117c2d2 | 1494 | else |
b80f6443 | 1495 | j = i; |
7117c2d2 JA |
1496 | } |
1497 | string[j] = '\0'; | |
1498 | ||
ccc6cda3 JA |
1499 | return (string); |
1500 | } | |
726f6388 | 1501 | |
ccc6cda3 | 1502 | #if 0 |
cce855bc | 1503 | /*UNUSED*/ |
ccc6cda3 JA |
1504 | /* Replace instances of \! in a string with !. */ |
1505 | void | |
1506 | unquote_bang (string) | |
1507 | char *string; | |
1508 | { | |
1509 | register int i, j; | |
1510 | register char *temp; | |
726f6388 | 1511 | |
f73dda09 | 1512 | temp = (char *)xmalloc (1 + strlen (string)); |
726f6388 | 1513 | |
ccc6cda3 JA |
1514 | for (i = 0, j = 0; (temp[j] = string[i]); i++, j++) |
1515 | { | |
1516 | if (string[i] == '\\' && string[i + 1] == '!') | |
1517 | { | |
1518 | temp[j] = '!'; | |
1519 | i++; | |
1520 | } | |
1521 | } | |
1522 | strcpy (string, temp); | |
1523 | free (temp); | |
726f6388 | 1524 | } |
ccc6cda3 | 1525 | #endif |
726f6388 | 1526 | |
3185942a JA |
1527 | #define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0) |
1528 | ||
89a92869 | 1529 | /* This function assumes s[i] == open; returns with s[ret] == close; used to |
0001803f CR |
1530 | parse array subscripts. FLAGS & 1 means to not attempt to skip over |
1531 | matched pairs of quotes or backquotes, or skip word expansions; it is | |
1532 | intended to be used after expansion has been performed and during final | |
1533 | assignment parsing (see arrayfunc.c:assign_compound_array_list()). */ | |
89a92869 CR |
1534 | static int |
1535 | skip_matched_pair (string, start, open, close, flags) | |
1536 | const char *string; | |
1537 | int start, open, close, flags; | |
1538 | { | |
1539 | int i, pass_next, backq, si, c, count; | |
1540 | size_t slen; | |
1541 | char *temp, *ss; | |
1542 | DECLARE_MBSTATE; | |
1543 | ||
1544 | slen = strlen (string + start) + start; | |
1545 | no_longjmp_on_fatal_error = 1; | |
1546 | ||
1547 | i = start + 1; /* skip over leading bracket */ | |
1548 | count = 1; | |
1549 | pass_next = backq = 0; | |
1550 | ss = (char *)string; | |
1551 | while (c = string[i]) | |
1552 | { | |
1553 | if (pass_next) | |
1554 | { | |
1555 | pass_next = 0; | |
1556 | if (c == 0) | |
1557 | CQ_RETURN(i); | |
1558 | ADVANCE_CHAR (string, slen, i); | |
1559 | continue; | |
1560 | } | |
1561 | else if (c == '\\') | |
1562 | { | |
1563 | pass_next = 1; | |
1564 | i++; | |
1565 | continue; | |
1566 | } | |
1567 | else if (backq) | |
1568 | { | |
1569 | if (c == '`') | |
1570 | backq = 0; | |
1571 | ADVANCE_CHAR (string, slen, i); | |
1572 | continue; | |
1573 | } | |
0001803f | 1574 | else if ((flags & 1) == 0 && c == '`') |
89a92869 CR |
1575 | { |
1576 | backq = 1; | |
1577 | i++; | |
1578 | continue; | |
1579 | } | |
0001803f | 1580 | else if ((flags & 1) == 0 && c == open) |
89a92869 CR |
1581 | { |
1582 | count++; | |
1583 | i++; | |
1584 | continue; | |
1585 | } | |
1586 | else if (c == close) | |
1587 | { | |
1588 | count--; | |
1589 | if (count == 0) | |
1590 | break; | |
1591 | i++; | |
1592 | continue; | |
1593 | } | |
0001803f | 1594 | else if ((flags & 1) == 0 && (c == '\'' || c == '"')) |
89a92869 CR |
1595 | { |
1596 | i = (c == '\'') ? skip_single_quoted (ss, slen, ++i) | |
1597 | : skip_double_quoted (ss, slen, ++i); | |
1598 | /* no increment, the skip functions increment past the closing quote. */ | |
1599 | } | |
0001803f | 1600 | else if ((flags&1) == 0 && c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE)) |
89a92869 CR |
1601 | { |
1602 | si = i + 2; | |
1603 | if (string[si] == '\0') | |
1604 | CQ_RETURN(si); | |
1605 | ||
1606 | if (string[i+1] == LPAREN) | |
1607 | temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1608 | else | |
1609 | temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC); | |
1610 | i = si; | |
1611 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1612 | break; | |
1613 | i++; | |
1614 | continue; | |
1615 | } | |
1616 | else | |
1617 | ADVANCE_CHAR (string, slen, i); | |
1618 | } | |
1619 | ||
1620 | CQ_RETURN(i); | |
1621 | } | |
1622 | ||
1623 | #if defined (ARRAY_VARS) | |
1624 | int | |
0001803f | 1625 | skipsubscript (string, start, flags) |
89a92869 | 1626 | const char *string; |
0001803f | 1627 | int start, flags; |
89a92869 | 1628 | { |
0001803f | 1629 | return (skip_matched_pair (string, start, '[', ']', flags)); |
89a92869 CR |
1630 | } |
1631 | #endif | |
1632 | ||
3185942a JA |
1633 | /* Skip characters in STRING until we find a character in DELIMS, and return |
1634 | the index of that character. START is the index into string at which we | |
1635 | begin. This is similar in spirit to strpbrk, but it returns an index into | |
1636 | STRING and takes a starting index. This little piece of code knows quite | |
1637 | a lot of shell syntax. It's very similar to skip_double_quoted and other | |
1638 | functions of that ilk. */ | |
1639 | int | |
1640 | skip_to_delim (string, start, delims, flags) | |
1641 | char *string; | |
1642 | int start; | |
1643 | char *delims; | |
1644 | int flags; | |
1645 | { | |
0001803f | 1646 | int i, pass_next, backq, si, c, invert, skipquote, skipcmd; |
3185942a JA |
1647 | size_t slen; |
1648 | char *temp; | |
1649 | DECLARE_MBSTATE; | |
1650 | ||
1651 | slen = strlen (string + start) + start; | |
1652 | if (flags & SD_NOJMP) | |
1653 | no_longjmp_on_fatal_error = 1; | |
1654 | invert = (flags & SD_INVERT); | |
0001803f | 1655 | skipcmd = (flags & SD_NOSKIPCMD) == 0; |
3185942a JA |
1656 | |
1657 | i = start; | |
1658 | pass_next = backq = 0; | |
1659 | while (c = string[i]) | |
1660 | { | |
0001803f CR |
1661 | /* If this is non-zero, we should not let quote characters be delimiters |
1662 | and the current character is a single or double quote. We should not | |
1663 | test whether or not it's a delimiter until after we skip single- or | |
1664 | double-quoted strings. */ | |
1665 | skipquote = ((flags & SD_NOQUOTEDELIM) && (c == '\'' || c =='"')); | |
3185942a JA |
1666 | if (pass_next) |
1667 | { | |
1668 | pass_next = 0; | |
1669 | if (c == 0) | |
1670 | CQ_RETURN(i); | |
1671 | ADVANCE_CHAR (string, slen, i); | |
1672 | continue; | |
1673 | } | |
1674 | else if (c == '\\') | |
1675 | { | |
1676 | pass_next = 1; | |
1677 | i++; | |
1678 | continue; | |
1679 | } | |
1680 | else if (backq) | |
1681 | { | |
1682 | if (c == '`') | |
1683 | backq = 0; | |
1684 | ADVANCE_CHAR (string, slen, i); | |
1685 | continue; | |
1686 | } | |
1687 | else if (c == '`') | |
1688 | { | |
1689 | backq = 1; | |
1690 | i++; | |
1691 | continue; | |
1692 | } | |
0001803f | 1693 | else if (skipquote == 0 && invert == 0 && member (c, delims)) |
3185942a JA |
1694 | break; |
1695 | else if (c == '\'' || c == '"') | |
1696 | { | |
1697 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1698 | : skip_double_quoted (string, slen, ++i); | |
1699 | /* no increment, the skip functions increment past the closing quote. */ | |
1700 | } | |
0001803f | 1701 | else if (c == '$' && ((skipcmd && string[i+1] == LPAREN) || string[i+1] == LBRACE)) |
3185942a JA |
1702 | { |
1703 | si = i + 2; | |
1704 | if (string[si] == '\0') | |
1705 | CQ_RETURN(si); | |
1706 | ||
1707 | if (string[i+1] == LPAREN) | |
1708 | temp = extract_delimited_string (string, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1709 | else | |
1710 | temp = extract_dollar_brace_string (string, &si, 0, SX_NOALLOC); | |
1711 | i = si; | |
1712 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1713 | break; | |
1714 | i++; | |
1715 | continue; | |
1716 | } | |
0001803f CR |
1717 | #if defined (PROCESS_SUBSTITUTION) |
1718 | else if (skipcmd && (c == '<' || c == '>') && string[i+1] == LPAREN) | |
1719 | { | |
1720 | si = i + 2; | |
1721 | if (string[si] == '\0') | |
1722 | CQ_RETURN(si); | |
1723 | temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si); | |
1724 | i = si; | |
1725 | if (string[i] == '\0') | |
1726 | break; | |
1727 | i++; | |
1728 | continue; | |
1729 | } | |
1730 | #endif /* PROCESS_SUBSTITUTION */ | |
1731 | else if ((skipquote || invert) && (member (c, delims) == 0)) | |
3185942a JA |
1732 | break; |
1733 | else | |
1734 | ADVANCE_CHAR (string, slen, i); | |
1735 | } | |
1736 | ||
1737 | CQ_RETURN(i); | |
1738 | } | |
1739 | ||
ccc6cda3 | 1740 | #if defined (READLINE) |
726f6388 JA |
1741 | /* Return 1 if the portion of STRING ending at EINDEX is quoted (there is |
1742 | an unclosed quoted string), or if the character at EINDEX is quoted | |
28ef6c31 | 1743 | by a backslash. NO_LONGJMP_ON_FATAL_ERROR is used to flag that the various |
b72432fd | 1744 | single and double-quoted string parsing functions should not return an |
7117c2d2 JA |
1745 | error if there are unclosed quotes or braces. The characters that this |
1746 | recognizes need to be the same as the contents of | |
1747 | rl_completer_quote_characters. */ | |
b72432fd | 1748 | |
726f6388 JA |
1749 | int |
1750 | char_is_quoted (string, eindex) | |
1751 | char *string; | |
1752 | int eindex; | |
1753 | { | |
7117c2d2 JA |
1754 | int i, pass_next, c; |
1755 | size_t slen; | |
1756 | DECLARE_MBSTATE; | |
726f6388 | 1757 | |
7117c2d2 | 1758 | slen = strlen (string); |
28ef6c31 | 1759 | no_longjmp_on_fatal_error = 1; |
7117c2d2 JA |
1760 | i = pass_next = 0; |
1761 | while (i <= eindex) | |
726f6388 | 1762 | { |
7117c2d2 JA |
1763 | c = string[i]; |
1764 | ||
726f6388 JA |
1765 | if (pass_next) |
1766 | { | |
1767 | pass_next = 0; | |
1768 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
b72432fd | 1769 | CQ_RETURN(1); |
7117c2d2 | 1770 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1771 | continue; |
1772 | } | |
7117c2d2 | 1773 | else if (c == '\\') |
ccc6cda3 JA |
1774 | { |
1775 | pass_next = 1; | |
7117c2d2 | 1776 | i++; |
ccc6cda3 JA |
1777 | continue; |
1778 | } | |
7117c2d2 JA |
1779 | else if (c == '\'' || c == '"') |
1780 | { | |
1781 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1782 | : skip_double_quoted (string, slen, ++i); | |
1783 | if (i > eindex) | |
1784 | CQ_RETURN(1); | |
1785 | /* no increment, the skip_xxx functions go one past end */ | |
1786 | } | |
1787 | else | |
1788 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 1789 | } |
7117c2d2 | 1790 | |
b72432fd | 1791 | CQ_RETURN(0); |
726f6388 JA |
1792 | } |
1793 | ||
726f6388 JA |
1794 | int |
1795 | unclosed_pair (string, eindex, openstr) | |
1796 | char *string; | |
1797 | int eindex; | |
1798 | char *openstr; | |
1799 | { | |
ccc6cda3 | 1800 | int i, pass_next, openc, olen; |
7117c2d2 JA |
1801 | size_t slen; |
1802 | DECLARE_MBSTATE; | |
726f6388 | 1803 | |
7117c2d2 | 1804 | slen = strlen (string); |
726f6388 | 1805 | olen = strlen (openstr); |
7117c2d2 JA |
1806 | i = pass_next = openc = 0; |
1807 | while (i <= eindex) | |
726f6388 JA |
1808 | { |
1809 | if (pass_next) | |
1810 | { | |
1811 | pass_next = 0; | |
1812 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
1813 | return 0; | |
7117c2d2 JA |
1814 | ADVANCE_CHAR (string, slen, i); |
1815 | continue; | |
1816 | } | |
1817 | else if (string[i] == '\\') | |
1818 | { | |
1819 | pass_next = 1; | |
1820 | i++; | |
726f6388 JA |
1821 | continue; |
1822 | } | |
1823 | else if (STREQN (string + i, openstr, olen)) | |
1824 | { | |
1825 | openc = 1 - openc; | |
7117c2d2 | 1826 | i += olen; |
726f6388 | 1827 | } |
ccc6cda3 | 1828 | else if (string[i] == '\'' || string[i] == '"') |
726f6388 | 1829 | { |
7117c2d2 JA |
1830 | i = (string[i] == '\'') ? skip_single_quoted (string, slen, i) |
1831 | : skip_double_quoted (string, slen, i); | |
726f6388 JA |
1832 | if (i > eindex) |
1833 | return 0; | |
1834 | } | |
7117c2d2 JA |
1835 | else |
1836 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1837 | } |
1838 | return (openc); | |
1839 | } | |
bb70624e | 1840 | |
bb70624e JA |
1841 | /* Split STRING (length SLEN) at DELIMS, and return a WORD_LIST with the |
1842 | individual words. If DELIMS is NULL, the current value of $IFS is used | |
b80f6443 JA |
1843 | to split the string, and the function follows the shell field splitting |
1844 | rules. SENTINEL is an index to look for. NWP, if non-NULL, | |
bb70624e JA |
1845 | gets the number of words in the returned list. CWP, if non-NULL, gets |
1846 | the index of the word containing SENTINEL. Non-whitespace chars in | |
1847 | DELIMS delimit separate fields. */ | |
1848 | WORD_LIST * | |
0001803f | 1849 | split_at_delims (string, slen, delims, sentinel, flags, nwp, cwp) |
bb70624e JA |
1850 | char *string; |
1851 | int slen; | |
1852 | char *delims; | |
0001803f | 1853 | int sentinel, flags; |
bb70624e JA |
1854 | int *nwp, *cwp; |
1855 | { | |
0001803f | 1856 | int ts, te, i, nw, cw, ifs_split, dflags; |
f73dda09 | 1857 | char *token, *d, *d2; |
bb70624e JA |
1858 | WORD_LIST *ret, *tl; |
1859 | ||
1860 | if (string == 0 || *string == '\0') | |
1861 | { | |
1862 | if (nwp) | |
1863 | *nwp = 0; | |
1864 | if (cwp) | |
1865 | *cwp = 0; | |
1866 | return ((WORD_LIST *)NULL); | |
1867 | } | |
1868 | ||
7117c2d2 | 1869 | d = (delims == 0) ? ifs_value : delims; |
b80f6443 | 1870 | ifs_split = delims == 0; |
bb70624e JA |
1871 | |
1872 | /* Make d2 the non-whitespace characters in delims */ | |
1873 | d2 = 0; | |
1874 | if (delims) | |
1875 | { | |
95732b49 JA |
1876 | size_t slength; |
1877 | #if defined (HANDLE_MULTIBYTE) | |
1878 | size_t mblength = 1; | |
1879 | #endif | |
1880 | DECLARE_MBSTATE; | |
1881 | ||
1882 | slength = strlen (delims); | |
1883 | d2 = (char *)xmalloc (slength + 1); | |
1884 | i = ts = 0; | |
1885 | while (delims[i]) | |
bb70624e | 1886 | { |
95732b49 | 1887 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
1888 | mbstate_t state_bak; |
1889 | state_bak = state; | |
95732b49 JA |
1890 | mblength = MBRLEN (delims + i, slength, &state); |
1891 | if (MB_INVALIDCH (mblength)) | |
1892 | state = state_bak; | |
1893 | else if (mblength > 1) | |
1894 | { | |
1895 | memcpy (d2 + ts, delims + i, mblength); | |
1896 | ts += mblength; | |
1897 | i += mblength; | |
1898 | slength -= mblength; | |
1899 | continue; | |
1900 | } | |
1901 | #endif | |
1902 | if (whitespace (delims[i]) == 0) | |
bb70624e | 1903 | d2[ts++] = delims[i]; |
95732b49 JA |
1904 | |
1905 | i++; | |
1906 | slength--; | |
bb70624e JA |
1907 | } |
1908 | d2[ts] = '\0'; | |
1909 | } | |
1910 | ||
1911 | ret = (WORD_LIST *)NULL; | |
1912 | ||
0001803f | 1913 | /* Remove sequences of whitespace characters at the start of the string, as |
b80f6443 JA |
1914 | long as those characters are delimiters. */ |
1915 | for (i = 0; member (string[i], d) && spctabnl (string[i]); i++) | |
bb70624e JA |
1916 | ; |
1917 | if (string[i] == '\0') | |
1918 | return (ret); | |
1919 | ||
1920 | ts = i; | |
1921 | nw = 0; | |
1922 | cw = -1; | |
0001803f | 1923 | dflags = flags|SD_NOJMP; |
bb70624e JA |
1924 | while (1) |
1925 | { | |
0001803f | 1926 | te = skip_to_delim (string, ts, d, dflags); |
bb70624e JA |
1927 | |
1928 | /* If we have a non-whitespace delimiter character, use it to make a | |
1929 | separate field. This is just about what $IFS splitting does and | |
1930 | is closer to the behavior of the shell parser. */ | |
28ef6c31 | 1931 | if (ts == te && d2 && member (string[ts], d2)) |
bb70624e JA |
1932 | { |
1933 | te = ts + 1; | |
b80f6443 JA |
1934 | /* If we're using IFS splitting, the non-whitespace delimiter char |
1935 | and any additional IFS whitespace delimits a field. */ | |
1936 | if (ifs_split) | |
1937 | while (member (string[te], d) && spctabnl (string[te])) | |
1938 | te++; | |
1939 | else | |
1940 | while (member (string[te], d2)) | |
1941 | te++; | |
bb70624e JA |
1942 | } |
1943 | ||
1944 | token = substring (string, ts, te); | |
1945 | ||
1946 | ret = add_string_to_list (token, ret); | |
1947 | free (token); | |
1948 | nw++; | |
1949 | ||
1950 | if (sentinel >= ts && sentinel <= te) | |
1951 | cw = nw; | |
1952 | ||
1953 | /* If the cursor is at whitespace just before word start, set the | |
28ef6c31 | 1954 | sentinel word to the current word. */ |
bb70624e JA |
1955 | if (cwp && cw == -1 && sentinel == ts-1) |
1956 | cw = nw; | |
1957 | ||
1958 | /* If the cursor is at whitespace between two words, make a new, empty | |
28ef6c31 JA |
1959 | word, add it before (well, after, since the list is in reverse order) |
1960 | the word we just added, and set the current word to that one. */ | |
bb70624e | 1961 | if (cwp && cw == -1 && sentinel < ts) |
28ef6c31 | 1962 | { |
7117c2d2 | 1963 | tl = make_word_list (make_word (""), ret->next); |
28ef6c31 JA |
1964 | ret->next = tl; |
1965 | cw = nw; | |
1966 | nw++; | |
1967 | } | |
bb70624e JA |
1968 | |
1969 | if (string[te] == 0) | |
1970 | break; | |
1971 | ||
b80f6443 JA |
1972 | i = te; |
1973 | while (member (string[i], d) && (ifs_split || spctabnl(string[i]))) | |
bb70624e JA |
1974 | i++; |
1975 | ||
1976 | if (string[i]) | |
1977 | ts = i; | |
1978 | else | |
1979 | break; | |
1980 | } | |
1981 | ||
1982 | /* Special case for SENTINEL at the end of STRING. If we haven't found | |
1983 | the word containing SENTINEL yet, and the index we're looking for is at | |
0001803f CR |
1984 | the end of STRING (or past the end of the previously-found token, |
1985 | possible if the end of the line is composed solely of IFS whitespace) | |
1986 | add an additional null argument and set the current word pointer to that. */ | |
1987 | if (cwp && cw == -1 && (sentinel >= slen || sentinel >= te)) | |
bb70624e JA |
1988 | { |
1989 | if (whitespace (string[sentinel - 1])) | |
28ef6c31 JA |
1990 | { |
1991 | token = ""; | |
1992 | ret = add_string_to_list (token, ret); | |
1993 | nw++; | |
1994 | } | |
bb70624e JA |
1995 | cw = nw; |
1996 | } | |
1997 | ||
1998 | if (nwp) | |
1999 | *nwp = nw; | |
2000 | if (cwp) | |
2001 | *cwp = cw; | |
2002 | ||
2003 | return (REVERSE_LIST (ret, WORD_LIST *)); | |
2004 | } | |
726f6388 JA |
2005 | #endif /* READLINE */ |
2006 | ||
ccc6cda3 JA |
2007 | #if 0 |
2008 | /* UNUSED */ | |
726f6388 JA |
2009 | /* Extract the name of the variable to bind to from the assignment string. */ |
2010 | char * | |
2011 | assignment_name (string) | |
2012 | char *string; | |
2013 | { | |
ccc6cda3 | 2014 | int offset; |
726f6388 JA |
2015 | char *temp; |
2016 | ||
b80f6443 | 2017 | offset = assignment (string, 0); |
ccc6cda3 | 2018 | if (offset == 0) |
726f6388 | 2019 | return (char *)NULL; |
bb70624e | 2020 | temp = substring (string, 0, offset); |
726f6388 JA |
2021 | return (temp); |
2022 | } | |
ccc6cda3 | 2023 | #endif |
726f6388 | 2024 | |
cce855bc JA |
2025 | /* **************************************************************** */ |
2026 | /* */ | |
2027 | /* Functions to convert strings to WORD_LISTs and vice versa */ | |
2028 | /* */ | |
2029 | /* **************************************************************** */ | |
2030 | ||
726f6388 JA |
2031 | /* Return a single string of all the words in LIST. SEP is the separator |
2032 | to put between individual elements of LIST in the output string. */ | |
7117c2d2 | 2033 | char * |
726f6388 JA |
2034 | string_list_internal (list, sep) |
2035 | WORD_LIST *list; | |
2036 | char *sep; | |
2037 | { | |
2038 | register WORD_LIST *t; | |
2039 | char *result, *r; | |
2040 | int word_len, sep_len, result_size; | |
2041 | ||
ccc6cda3 | 2042 | if (list == 0) |
726f6388 JA |
2043 | return ((char *)NULL); |
2044 | ||
b80f6443 JA |
2045 | /* Short-circuit quickly if we don't need to separate anything. */ |
2046 | if (list->next == 0) | |
2047 | return (savestring (list->word->word)); | |
2048 | ||
726f6388 JA |
2049 | /* This is nearly always called with either sep[0] == 0 or sep[1] == 0. */ |
2050 | sep_len = STRLEN (sep); | |
2051 | result_size = 0; | |
2052 | ||
2053 | for (t = list; t; t = t->next) | |
2054 | { | |
2055 | if (t != list) | |
2056 | result_size += sep_len; | |
2057 | result_size += strlen (t->word->word); | |
2058 | } | |
2059 | ||
f73dda09 | 2060 | r = result = (char *)xmalloc (result_size + 1); |
726f6388 JA |
2061 | |
2062 | for (t = list; t; t = t->next) | |
2063 | { | |
2064 | if (t != list && sep_len) | |
2065 | { | |
ccc6cda3 JA |
2066 | if (sep_len > 1) |
2067 | { | |
2068 | FASTCOPY (sep, r, sep_len); | |
2069 | r += sep_len; | |
2070 | } | |
2071 | else | |
2072 | *r++ = sep[0]; | |
726f6388 JA |
2073 | } |
2074 | ||
2075 | word_len = strlen (t->word->word); | |
2076 | FASTCOPY (t->word->word, r, word_len); | |
2077 | r += word_len; | |
2078 | } | |
2079 | ||
ccc6cda3 | 2080 | *r = '\0'; |
726f6388 JA |
2081 | return (result); |
2082 | } | |
2083 | ||
2084 | /* Return a single string of all the words present in LIST, separating | |
2085 | each word with a space. */ | |
2086 | char * | |
2087 | string_list (list) | |
2088 | WORD_LIST *list; | |
2089 | { | |
2090 | return (string_list_internal (list, " ")); | |
2091 | } | |
2092 | ||
3185942a JA |
2093 | /* An external interface that can be used by the rest of the shell to |
2094 | obtain a string containing the first character in $IFS. Handles all | |
2095 | the multibyte complications. If LENP is non-null, it is set to the | |
2096 | length of the returned string. */ | |
2097 | char * | |
2098 | ifs_firstchar (lenp) | |
2099 | int *lenp; | |
2100 | { | |
2101 | char *ret; | |
2102 | int len; | |
2103 | ||
2104 | ret = xmalloc (MB_LEN_MAX + 1); | |
2105 | #if defined (HANDLE_MULTIBYTE) | |
2106 | if (ifs_firstc_len == 1) | |
2107 | { | |
2108 | ret[0] = ifs_firstc[0]; | |
2109 | ret[1] = '\0'; | |
2110 | len = ret[0] ? 1 : 0; | |
2111 | } | |
2112 | else | |
2113 | { | |
2114 | memcpy (ret, ifs_firstc, ifs_firstc_len); | |
2115 | ret[len = ifs_firstc_len] = '\0'; | |
2116 | } | |
2117 | #else | |
2118 | ret[0] = ifs_firstc; | |
2119 | ret[1] = '\0'; | |
2120 | len = ret[0] ? 0 : 1; | |
2121 | #endif | |
2122 | ||
2123 | if (lenp) | |
2124 | *lenp = len; | |
2125 | ||
2126 | return ret; | |
2127 | } | |
2128 | ||
726f6388 JA |
2129 | /* Return a single string of all the words present in LIST, obeying the |
2130 | quoting rules for "$*", to wit: (P1003.2, draft 11, 3.5.2) "If the | |
2131 | expansion [of $*] appears within a double quoted string, it expands | |
2132 | to a single field with the value of each parameter separated by the | |
2133 | first character of the IFS variable, or by a <space> if IFS is unset." */ | |
f73dda09 | 2134 | char * |
726f6388 JA |
2135 | string_list_dollar_star (list) |
2136 | WORD_LIST *list; | |
2137 | { | |
0628567a | 2138 | char *ret; |
95732b49 | 2139 | #if defined (HANDLE_MULTIBYTE) |
0628567a | 2140 | # if defined (__GNUC__) |
95732b49 | 2141 | char sep[MB_CUR_MAX + 1]; |
0628567a JA |
2142 | # else |
2143 | char *sep = 0; | |
2144 | # endif | |
95732b49 | 2145 | #else |
7117c2d2 | 2146 | char sep[2]; |
95732b49 | 2147 | #endif |
726f6388 | 2148 | |
95732b49 | 2149 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
2150 | # if !defined (__GNUC__) |
2151 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2152 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2153 | if (ifs_firstc_len == 1) |
2154 | { | |
2155 | sep[0] = ifs_firstc[0]; | |
2156 | sep[1] = '\0'; | |
2157 | } | |
2158 | else | |
2159 | { | |
2160 | memcpy (sep, ifs_firstc, ifs_firstc_len); | |
2161 | sep[ifs_firstc_len] = '\0'; | |
2162 | } | |
2163 | #else | |
7117c2d2 | 2164 | sep[0] = ifs_firstc; |
726f6388 | 2165 | sep[1] = '\0'; |
95732b49 | 2166 | #endif |
726f6388 | 2167 | |
0628567a JA |
2168 | ret = string_list_internal (list, sep); |
2169 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2170 | free (sep); | |
2171 | #endif | |
2172 | return ret; | |
726f6388 JA |
2173 | } |
2174 | ||
cce855bc JA |
2175 | /* Turn $@ into a string. If (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
2176 | is non-zero, the $@ appears within double quotes, and we should quote | |
2177 | the list before converting it into a string. If IFS is unset, and the | |
2178 | word is not quoted, we just need to quote CTLESC and CTLNUL characters | |
2179 | in the words in the list, because the default value of $IFS is | |
2180 | <space><tab><newline>, IFS characters in the words in the list should | |
2181 | also be split. If IFS is null, and the word is not quoted, we need | |
2182 | to quote the words in the list to preserve the positional parameters | |
2183 | exactly. */ | |
f73dda09 | 2184 | char * |
cce855bc JA |
2185 | string_list_dollar_at (list, quoted) |
2186 | WORD_LIST *list; | |
2187 | int quoted; | |
2188 | { | |
95732b49 JA |
2189 | char *ifs, *ret; |
2190 | #if defined (HANDLE_MULTIBYTE) | |
0628567a | 2191 | # if defined (__GNUC__) |
95732b49 | 2192 | char sep[MB_CUR_MAX + 1]; |
0628567a JA |
2193 | # else |
2194 | char *sep = 0; | |
2195 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2196 | #else |
2197 | char sep[2]; | |
2198 | #endif | |
cce855bc JA |
2199 | WORD_LIST *tlist; |
2200 | ||
7117c2d2 JA |
2201 | /* XXX this could just be ifs = ifs_value; */ |
2202 | ifs = ifs_var ? value_cell (ifs_var) : (char *)0; | |
cce855bc | 2203 | |
95732b49 | 2204 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
2205 | # if !defined (__GNUC__) |
2206 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2207 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2208 | if (ifs && *ifs) |
2209 | { | |
2210 | if (ifs_firstc_len == 1) | |
2211 | { | |
2212 | sep[0] = ifs_firstc[0]; | |
2213 | sep[1] = '\0'; | |
2214 | } | |
2215 | else | |
2216 | { | |
2217 | memcpy (sep, ifs_firstc, ifs_firstc_len); | |
2218 | sep[ifs_firstc_len] = '\0'; | |
2219 | } | |
2220 | } | |
2221 | else | |
2222 | { | |
2223 | sep[0] = ' '; | |
2224 | sep[1] = '\0'; | |
2225 | } | |
2226 | #else | |
cce855bc JA |
2227 | sep[0] = (ifs == 0 || *ifs == 0) ? ' ' : *ifs; |
2228 | sep[1] = '\0'; | |
95732b49 | 2229 | #endif |
cce855bc | 2230 | |
f1be666c JA |
2231 | /* XXX -- why call quote_list if ifs == 0? we can get away without doing |
2232 | it now that quote_escapes quotes spaces */ | |
2233 | #if 0 | |
cce855bc | 2234 | tlist = ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (ifs && *ifs == 0)) |
f1be666c | 2235 | #else |
0001803f | 2236 | tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
f1be666c | 2237 | #endif |
cce855bc JA |
2238 | ? quote_list (list) |
2239 | : list_quote_escapes (list); | |
0628567a JA |
2240 | |
2241 | ret = string_list_internal (tlist, sep); | |
2242 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2243 | free (sep); | |
2244 | #endif | |
2245 | return ret; | |
cce855bc JA |
2246 | } |
2247 | ||
3185942a JA |
2248 | /* Turn the positional paramters into a string, understanding quoting and |
2249 | the various subtleties of using the first character of $IFS as the | |
2250 | separator. Calls string_list_dollar_at, string_list_dollar_star, and | |
2251 | string_list as appropriate. */ | |
2252 | char * | |
2253 | string_list_pos_params (pchar, list, quoted) | |
2254 | int pchar; | |
2255 | WORD_LIST *list; | |
2256 | int quoted; | |
2257 | { | |
2258 | char *ret; | |
2259 | WORD_LIST *tlist; | |
2260 | ||
2261 | if (pchar == '*' && (quoted & Q_DOUBLE_QUOTES)) | |
2262 | { | |
2263 | tlist = quote_list (list); | |
2264 | word_list_remove_quoted_nulls (tlist); | |
2265 | ret = string_list_dollar_star (tlist); | |
2266 | } | |
2267 | else if (pchar == '*' && (quoted & Q_HERE_DOCUMENT)) | |
2268 | { | |
2269 | tlist = quote_list (list); | |
2270 | word_list_remove_quoted_nulls (tlist); | |
2271 | ret = string_list (tlist); | |
2272 | } | |
2273 | else if (pchar == '*') | |
2274 | { | |
2275 | /* Even when unquoted, string_list_dollar_star does the right thing | |
2276 | making sure that the first character of $IFS is used as the | |
2277 | separator. */ | |
2278 | ret = string_list_dollar_star (list); | |
2279 | } | |
2280 | else if (pchar == '@' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
2281 | /* We use string_list_dollar_at, but only if the string is quoted, since | |
2282 | that quotes the escapes if it's not, which we don't want. We could | |
2283 | use string_list (the old code did), but that doesn't do the right | |
2284 | thing if the first character of $IFS is not a space. We use | |
2285 | string_list_dollar_star if the string is unquoted so we make sure that | |
2286 | the elements of $@ are separated by the first character of $IFS for | |
2287 | later splitting. */ | |
2288 | ret = string_list_dollar_at (list, quoted); | |
2289 | else if (pchar == '@') | |
2290 | ret = string_list_dollar_star (list); | |
2291 | else | |
2292 | ret = string_list ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? quote_list (list) : list); | |
2293 | ||
2294 | return ret; | |
2295 | } | |
2296 | ||
726f6388 JA |
2297 | /* Return the list of words present in STRING. Separate the string into |
2298 | words at any of the characters found in SEPARATORS. If QUOTED is | |
2299 | non-zero then word in the list will have its quoted flag set, otherwise | |
2300 | the quoted flag is left as make_word () deemed fit. | |
2301 | ||
2302 | This obeys the P1003.2 word splitting semantics. If `separators' is | |
2303 | exactly <space><tab><newline>, then the splitting algorithm is that of | |
2304 | the Bourne shell, which treats any sequence of characters from `separators' | |
2305 | as a delimiter. If IFS is unset, which results in `separators' being set | |
2306 | to "", no splitting occurs. If separators has some other value, the | |
2307 | following rules are applied (`IFS white space' means zero or more | |
2308 | occurrences of <space>, <tab>, or <newline>, as long as those characters | |
2309 | are in `separators'): | |
2310 | ||
2311 | 1) IFS white space is ignored at the start and the end of the | |
2312 | string. | |
2313 | 2) Each occurrence of a character in `separators' that is not | |
2314 | IFS white space, along with any adjacent occurrences of | |
2315 | IFS white space delimits a field. | |
2316 | 3) Any nonzero-length sequence of IFS white space delimits a field. | |
2317 | */ | |
2318 | ||
2319 | /* BEWARE! list_string strips null arguments. Don't call it twice and | |
2320 | expect to have "" preserved! */ | |
2321 | ||
726f6388 JA |
2322 | /* This performs word splitting and quoted null character removal on |
2323 | STRING. */ | |
b80f6443 JA |
2324 | #define issep(c) \ |
2325 | (((separators)[0]) ? ((separators)[1] ? isifs(c) \ | |
2326 | : (c) == (separators)[0]) \ | |
2327 | : 0) | |
726f6388 JA |
2328 | |
2329 | WORD_LIST * | |
2330 | list_string (string, separators, quoted) | |
2331 | register char *string, *separators; | |
2332 | int quoted; | |
2333 | { | |
ccc6cda3 JA |
2334 | WORD_LIST *result; |
2335 | WORD_DESC *t; | |
2336 | char *current_word, *s; | |
3185942a | 2337 | int sindex, sh_style_split, whitesep, xflags; |
95732b49 | 2338 | size_t slen; |
726f6388 JA |
2339 | |
2340 | if (!string || !*string) | |
2341 | return ((WORD_LIST *)NULL); | |
2342 | ||
7117c2d2 JA |
2343 | sh_style_split = separators && separators[0] == ' ' && |
2344 | separators[1] == '\t' && | |
2345 | separators[2] == '\n' && | |
2346 | separators[3] == '\0'; | |
3185942a JA |
2347 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2348 | { | |
2349 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2350 | else if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2351 | } | |
726f6388 | 2352 | |
95732b49 | 2353 | slen = 0; |
726f6388 JA |
2354 | /* Remove sequences of whitespace at the beginning of STRING, as |
2355 | long as those characters appear in IFS. Do not do this if | |
2356 | STRING is quoted or if there are no separator characters. */ | |
2357 | if (!quoted || !separators || !*separators) | |
2358 | { | |
2359 | for (s = string; *s && spctabnl (*s) && issep (*s); s++); | |
2360 | ||
2361 | if (!*s) | |
2362 | return ((WORD_LIST *)NULL); | |
2363 | ||
2364 | string = s; | |
2365 | } | |
2366 | ||
2367 | /* OK, now STRING points to a word that does not begin with white space. | |
2368 | The splitting algorithm is: | |
7117c2d2 JA |
2369 | extract a word, stopping at a separator |
2370 | skip sequences of spc, tab, or nl as long as they are separators | |
726f6388 | 2371 | This obeys the field splitting rules in Posix.2. */ |
95732b49 | 2372 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 1; |
ccc6cda3 | 2373 | for (result = (WORD_LIST *)NULL, sindex = 0; string[sindex]; ) |
726f6388 | 2374 | { |
95732b49 JA |
2375 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2376 | unless multibyte chars are possible. */ | |
3185942a | 2377 | current_word = string_extract_verbatim (string, slen, &sindex, separators, xflags); |
ccc6cda3 | 2378 | if (current_word == 0) |
726f6388 JA |
2379 | break; |
2380 | ||
2381 | /* If we have a quoted empty string, add a quoted null argument. We | |
2382 | want to preserve the quoted null character iff this is a quoted | |
2383 | empty string; otherwise the quoted null characters are removed | |
2384 | below. */ | |
2385 | if (QUOTED_NULL (current_word)) | |
2386 | { | |
95732b49 | 2387 | t = alloc_word_desc (); |
726f6388 | 2388 | t->word = make_quoted_char ('\0'); |
95732b49 | 2389 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
726f6388 JA |
2390 | result = make_word_list (t, result); |
2391 | } | |
ccc6cda3 | 2392 | else if (current_word[0] != '\0') |
726f6388 JA |
2393 | { |
2394 | /* If we have something, then add it regardless. However, | |
2395 | perform quoted null character removal on the current word. */ | |
2396 | remove_quoted_nulls (current_word); | |
cce855bc | 2397 | result = add_string_to_list (current_word, result); |
95732b49 | 2398 | result->word->flags &= ~W_HASQUOTEDNULL; /* just to be sure */ |
ccc6cda3 JA |
2399 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) |
2400 | result->word->flags |= W_QUOTED; | |
726f6388 JA |
2401 | } |
2402 | ||
2403 | /* If we're not doing sequences of separators in the traditional | |
2404 | Bourne shell style, then add a quoted null argument. */ | |
726f6388 JA |
2405 | else if (!sh_style_split && !spctabnl (string[sindex])) |
2406 | { | |
95732b49 | 2407 | t = alloc_word_desc (); |
ccc6cda3 | 2408 | t->word = make_quoted_char ('\0'); |
95732b49 | 2409 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
ccc6cda3 | 2410 | result = make_word_list (t, result); |
726f6388 JA |
2411 | } |
2412 | ||
2413 | free (current_word); | |
2414 | ||
28ef6c31 JA |
2415 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2416 | whitesep = string[sindex] && spctabnl (string[sindex]); | |
2417 | ||
726f6388 JA |
2418 | /* Move past the current separator character. */ |
2419 | if (string[sindex]) | |
95732b49 JA |
2420 | { |
2421 | DECLARE_MBSTATE; | |
2422 | ADVANCE_CHAR (string, slen, sindex); | |
2423 | } | |
726f6388 JA |
2424 | |
2425 | /* Now skip sequences of space, tab, or newline characters if they are | |
2426 | in the list of separators. */ | |
2427 | while (string[sindex] && spctabnl (string[sindex]) && issep (string[sindex])) | |
2428 | sindex++; | |
28ef6c31 | 2429 | |
7117c2d2 JA |
2430 | /* If the first separator was IFS whitespace and the current character |
2431 | is a non-whitespace IFS character, it should be part of the current | |
2432 | field delimiter, not a separate delimiter that would result in an | |
2433 | empty field. Look at POSIX.2, 3.6.5, (3)(b). */ | |
28ef6c31 | 2434 | if (string[sindex] && whitesep && issep (string[sindex]) && !spctabnl (string[sindex])) |
95732b49 JA |
2435 | { |
2436 | sindex++; | |
2437 | /* An IFS character that is not IFS white space, along with any | |
2438 | adjacent IFS white space, shall delimit a field. (SUSv3) */ | |
0628567a | 2439 | while (string[sindex] && spctabnl (string[sindex]) && isifs (string[sindex])) |
95732b49 JA |
2440 | sindex++; |
2441 | } | |
726f6388 JA |
2442 | } |
2443 | return (REVERSE_LIST (result, WORD_LIST *)); | |
2444 | } | |
2445 | ||
2446 | /* Parse a single word from STRING, using SEPARATORS to separate fields. | |
2447 | ENDPTR is set to the first character after the word. This is used by | |
7117c2d2 JA |
2448 | the `read' builtin. This is never called with SEPARATORS != $IFS; |
2449 | it should be simplified. | |
2450 | ||
726f6388 JA |
2451 | XXX - this function is very similar to list_string; they should be |
2452 | combined - XXX */ | |
2453 | char * | |
2454 | get_word_from_string (stringp, separators, endptr) | |
2455 | char **stringp, *separators, **endptr; | |
2456 | { | |
2457 | register char *s; | |
2458 | char *current_word; | |
3185942a | 2459 | int sindex, sh_style_split, whitesep, xflags; |
95732b49 | 2460 | size_t slen; |
726f6388 JA |
2461 | |
2462 | if (!stringp || !*stringp || !**stringp) | |
2463 | return ((char *)NULL); | |
ccc6cda3 | 2464 | |
7117c2d2 JA |
2465 | sh_style_split = separators && separators[0] == ' ' && |
2466 | separators[1] == '\t' && | |
2467 | separators[2] == '\n' && | |
2468 | separators[3] == '\0'; | |
3185942a JA |
2469 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2470 | { | |
2471 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2472 | if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2473 | } | |
726f6388 | 2474 | |
3185942a | 2475 | s = *stringp; |
95732b49 JA |
2476 | slen = 0; |
2477 | ||
726f6388 JA |
2478 | /* Remove sequences of whitespace at the beginning of STRING, as |
2479 | long as those characters appear in IFS. */ | |
2480 | if (sh_style_split || !separators || !*separators) | |
2481 | { | |
7117c2d2 | 2482 | for (; *s && spctabnl (*s) && isifs (*s); s++); |
726f6388 JA |
2483 | |
2484 | /* If the string is nothing but whitespace, update it and return. */ | |
2485 | if (!*s) | |
2486 | { | |
2487 | *stringp = s; | |
2488 | if (endptr) | |
2489 | *endptr = s; | |
2490 | return ((char *)NULL); | |
2491 | } | |
2492 | } | |
2493 | ||
2494 | /* OK, S points to a word that does not begin with white space. | |
2495 | Now extract a word, stopping at a separator, save a pointer to | |
2496 | the first character after the word, then skip sequences of spc, | |
2497 | tab, or nl as long as they are separators. | |
ccc6cda3 | 2498 | |
726f6388 JA |
2499 | This obeys the field splitting rules in Posix.2. */ |
2500 | sindex = 0; | |
95732b49 JA |
2501 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2502 | unless multibyte chars are possible. */ | |
2503 | slen = (MB_CUR_MAX > 1) ? strlen (s) : 1; | |
3185942a | 2504 | current_word = string_extract_verbatim (s, slen, &sindex, separators, xflags); |
726f6388 JA |
2505 | |
2506 | /* Set ENDPTR to the first character after the end of the word. */ | |
2507 | if (endptr) | |
2508 | *endptr = s + sindex; | |
2509 | ||
28ef6c31 JA |
2510 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2511 | whitesep = s[sindex] && spctabnl (s[sindex]); | |
2512 | ||
726f6388 JA |
2513 | /* Move past the current separator character. */ |
2514 | if (s[sindex]) | |
95732b49 JA |
2515 | { |
2516 | DECLARE_MBSTATE; | |
2517 | ADVANCE_CHAR (s, slen, sindex); | |
2518 | } | |
726f6388 JA |
2519 | |
2520 | /* Now skip sequences of space, tab, or newline characters if they are | |
2521 | in the list of separators. */ | |
7117c2d2 | 2522 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) |
726f6388 JA |
2523 | sindex++; |
2524 | ||
28ef6c31 JA |
2525 | /* If the first separator was IFS whitespace and the current character is |
2526 | a non-whitespace IFS character, it should be part of the current field | |
2527 | delimiter, not a separate delimiter that would result in an empty field. | |
2528 | Look at POSIX.2, 3.6.5, (3)(b). */ | |
7117c2d2 | 2529 | if (s[sindex] && whitesep && isifs (s[sindex]) && !spctabnl (s[sindex])) |
95732b49 JA |
2530 | { |
2531 | sindex++; | |
2532 | /* An IFS character that is not IFS white space, along with any adjacent | |
2533 | IFS white space, shall delimit a field. */ | |
2534 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) | |
2535 | sindex++; | |
2536 | } | |
28ef6c31 | 2537 | |
726f6388 JA |
2538 | /* Update STRING to point to the next field. */ |
2539 | *stringp = s + sindex; | |
2540 | return (current_word); | |
2541 | } | |
2542 | ||
2543 | /* Remove IFS white space at the end of STRING. Start at the end | |
2544 | of the string and walk backwards until the beginning of the string | |
2545 | or we find a character that's not IFS white space and not CTLESC. | |
2546 | Only let CTLESC escape a white space character if SAW_ESCAPE is | |
2547 | non-zero. */ | |
2548 | char * | |
2549 | strip_trailing_ifs_whitespace (string, separators, saw_escape) | |
2550 | char *string, *separators; | |
2551 | int saw_escape; | |
2552 | { | |
2553 | char *s; | |
ccc6cda3 | 2554 | |
726f6388 | 2555 | s = string + STRLEN (string) - 1; |
7117c2d2 | 2556 | while (s > string && ((spctabnl (*s) && isifs (*s)) || |
726f6388 JA |
2557 | (saw_escape && *s == CTLESC && spctabnl (s[1])))) |
2558 | s--; | |
2559 | *++s = '\0'; | |
2560 | return string; | |
2561 | } | |
2562 | ||
bb70624e JA |
2563 | #if 0 |
2564 | /* UNUSED */ | |
2565 | /* Split STRING into words at whitespace. Obeys shell-style quoting with | |
2566 | backslashes, single and double quotes. */ | |
ccc6cda3 JA |
2567 | WORD_LIST * |
2568 | list_string_with_quotes (string) | |
2569 | char *string; | |
2570 | { | |
2571 | WORD_LIST *list; | |
2572 | char *token, *s; | |
7117c2d2 | 2573 | size_t s_len; |
ccc6cda3 JA |
2574 | int c, i, tokstart, len; |
2575 | ||
2576 | for (s = string; s && *s && spctabnl (*s); s++) | |
2577 | ; | |
2578 | if (s == 0 || *s == 0) | |
2579 | return ((WORD_LIST *)NULL); | |
2580 | ||
7117c2d2 | 2581 | s_len = strlen (s); |
ccc6cda3 JA |
2582 | tokstart = i = 0; |
2583 | list = (WORD_LIST *)NULL; | |
2584 | while (1) | |
2585 | { | |
2586 | c = s[i]; | |
2587 | if (c == '\\') | |
2588 | { | |
2589 | i++; | |
2590 | if (s[i]) | |
2591 | i++; | |
2592 | } | |
2593 | else if (c == '\'') | |
7117c2d2 | 2594 | i = skip_single_quoted (s, s_len, ++i); |
ccc6cda3 | 2595 | else if (c == '"') |
7117c2d2 | 2596 | i = skip_double_quoted (s, s_len, ++i); |
ccc6cda3 JA |
2597 | else if (c == 0 || spctabnl (c)) |
2598 | { | |
2599 | /* We have found the end of a token. Make a word out of it and | |
2600 | add it to the word list. */ | |
bb70624e | 2601 | token = substring (s, tokstart, i); |
cce855bc | 2602 | list = add_string_to_list (token, list); |
ccc6cda3 JA |
2603 | free (token); |
2604 | while (spctabnl (s[i])) | |
2605 | i++; | |
2606 | if (s[i]) | |
2607 | tokstart = i; | |
2608 | else | |
2609 | break; | |
2610 | } | |
2611 | else | |
2612 | i++; /* normal character */ | |
2613 | } | |
2614 | return (REVERSE_LIST (list, WORD_LIST *)); | |
2615 | } | |
bb70624e | 2616 | #endif |
d166f048 | 2617 | |
cce855bc JA |
2618 | /********************************************************/ |
2619 | /* */ | |
2620 | /* Functions to perform assignment statements */ | |
2621 | /* */ | |
2622 | /********************************************************/ | |
d166f048 | 2623 | |
95732b49 JA |
2624 | #if defined (ARRAY_VARS) |
2625 | static SHELL_VAR * | |
2626 | do_compound_assignment (name, value, flags) | |
2627 | char *name, *value; | |
2628 | int flags; | |
2629 | { | |
2630 | SHELL_VAR *v; | |
3185942a | 2631 | int mklocal, mkassoc; |
0628567a | 2632 | WORD_LIST *list; |
95732b49 JA |
2633 | |
2634 | mklocal = flags & ASS_MKLOCAL; | |
3185942a | 2635 | mkassoc = flags & ASS_MKASSOC; |
95732b49 JA |
2636 | |
2637 | if (mklocal && variable_context) | |
2638 | { | |
2639 | v = find_variable (name); | |
3185942a JA |
2640 | list = expand_compound_array_assignment (v, value, flags); |
2641 | if (mkassoc) | |
2642 | v = make_local_assoc_variable (name); | |
2643 | else if (v == 0 || (array_p (v) == 0 && assoc_p (v) == 0) || v->context != variable_context) | |
95732b49 | 2644 | v = make_local_array_variable (name); |
0628567a | 2645 | assign_compound_array_list (v, list, flags); |
95732b49 JA |
2646 | } |
2647 | else | |
2648 | v = assign_array_from_string (name, value, flags); | |
2649 | ||
2650 | return (v); | |
2651 | } | |
2652 | #endif | |
2653 | ||
726f6388 JA |
2654 | /* Given STRING, an assignment string, get the value of the right side |
2655 | of the `=', and bind it to the left side. If EXPAND is true, then | |
2656 | perform parameter expansion, command substitution, and arithmetic | |
2657 | expansion on the right-hand side. Perform tilde expansion in any | |
2658 | case. Do not perform word splitting on the result of expansion. */ | |
2659 | static int | |
95732b49 JA |
2660 | do_assignment_internal (word, expand) |
2661 | const WORD_DESC *word; | |
726f6388 JA |
2662 | int expand; |
2663 | { | |
3185942a | 2664 | int offset, tlen, appendop, assign_list, aflags, retval; |
0628567a | 2665 | char *name, *value; |
ccc6cda3 JA |
2666 | SHELL_VAR *entry; |
2667 | #if defined (ARRAY_VARS) | |
2668 | char *t; | |
b80f6443 | 2669 | int ni; |
ccc6cda3 | 2670 | #endif |
95732b49 | 2671 | const char *string; |
ccc6cda3 | 2672 | |
95732b49 JA |
2673 | if (word == 0 || word->word == 0) |
2674 | return 0; | |
2675 | ||
2676 | appendop = assign_list = aflags = 0; | |
2677 | string = word->word; | |
b80f6443 | 2678 | offset = assignment (string, 0); |
ccc6cda3 JA |
2679 | name = savestring (string); |
2680 | value = (char *)NULL; | |
726f6388 JA |
2681 | |
2682 | if (name[offset] == '=') | |
2683 | { | |
2684 | char *temp; | |
2685 | ||
95732b49 JA |
2686 | if (name[offset - 1] == '+') |
2687 | { | |
2688 | appendop = 1; | |
2689 | name[offset - 1] = '\0'; | |
2690 | } | |
2691 | ||
2692 | name[offset] = 0; /* might need this set later */ | |
726f6388 | 2693 | temp = name + offset + 1; |
95732b49 | 2694 | tlen = STRLEN (temp); |
726f6388 | 2695 | |
ccc6cda3 | 2696 | #if defined (ARRAY_VARS) |
95732b49 | 2697 | if (expand && (word->flags & W_COMPASSIGN)) |
726f6388 | 2698 | { |
ccc6cda3 | 2699 | assign_list = ni = 1; |
95732b49 | 2700 | value = extract_array_assignment_list (temp, &ni); |
ccc6cda3 JA |
2701 | } |
2702 | else | |
2703 | #endif | |
ccc6cda3 | 2704 | if (expand && temp[0]) |
95732b49 | 2705 | value = expand_string_if_necessary (temp, 0, expand_string_assignment); |
726f6388 JA |
2706 | else |
2707 | value = savestring (temp); | |
2708 | } | |
2709 | ||
2710 | if (value == 0) | |
d166f048 | 2711 | { |
f73dda09 | 2712 | value = (char *)xmalloc (1); |
d166f048 JA |
2713 | value[0] = '\0'; |
2714 | } | |
726f6388 | 2715 | |
726f6388 | 2716 | if (echo_command_at_execute) |
95732b49 JA |
2717 | { |
2718 | if (appendop) | |
2719 | name[offset - 1] = '+'; | |
2720 | xtrace_print_assignment (name, value, assign_list, 1); | |
2721 | if (appendop) | |
2722 | name[offset - 1] = '\0'; | |
2723 | } | |
726f6388 | 2724 | |
d166f048 | 2725 | #define ASSIGN_RETURN(r) do { FREE (value); free (name); return (r); } while (0) |
ccc6cda3 | 2726 | |
95732b49 JA |
2727 | if (appendop) |
2728 | aflags |= ASS_APPEND; | |
2729 | ||
ccc6cda3 | 2730 | #if defined (ARRAY_VARS) |
0001803f | 2731 | if (t = mbschr (name, '[')) /*]*/ |
ccc6cda3 JA |
2732 | { |
2733 | if (assign_list) | |
2734 | { | |
b80f6443 | 2735 | report_error (_("%s: cannot assign list to array member"), name); |
ccc6cda3 JA |
2736 | ASSIGN_RETURN (0); |
2737 | } | |
95732b49 | 2738 | entry = assign_array_element (name, value, aflags); |
ccc6cda3 | 2739 | if (entry == 0) |
28ef6c31 | 2740 | ASSIGN_RETURN (0); |
ccc6cda3 JA |
2741 | } |
2742 | else if (assign_list) | |
95732b49 JA |
2743 | { |
2744 | if (word->flags & W_ASSIGNARG) | |
2745 | aflags |= ASS_MKLOCAL; | |
3185942a JA |
2746 | if (word->flags & W_ASSIGNASSOC) |
2747 | aflags |= ASS_MKASSOC; | |
95732b49 JA |
2748 | entry = do_compound_assignment (name, value, aflags); |
2749 | } | |
ccc6cda3 JA |
2750 | else |
2751 | #endif /* ARRAY_VARS */ | |
95732b49 | 2752 | entry = bind_variable (name, value, aflags); |
ccc6cda3 | 2753 | |
726f6388 JA |
2754 | stupidly_hack_special_variables (name); |
2755 | ||
3185942a JA |
2756 | #if 1 |
2757 | /* Return 1 if the assignment seems to have been performed correctly. */ | |
2758 | if (entry == 0 || readonly_p (entry)) | |
2759 | retval = 0; /* assignment failure */ | |
2760 | else if (noassign_p (entry)) | |
2761 | { | |
2762 | last_command_exit_value = EXECUTION_FAILURE; | |
2763 | retval = 1; /* error status, but not assignment failure */ | |
2764 | } | |
2765 | else | |
2766 | retval = 1; | |
2767 | ||
2768 | if (entry && retval != 0 && noassign_p (entry) == 0) | |
2769 | VUNSETATTR (entry, att_invisible); | |
2770 | ||
2771 | ASSIGN_RETURN (retval); | |
2772 | #else | |
726f6388 | 2773 | if (entry) |
bb70624e | 2774 | VUNSETATTR (entry, att_invisible); |
726f6388 | 2775 | |
28ef6c31 | 2776 | ASSIGN_RETURN (entry ? ((readonly_p (entry) == 0) && noassign_p (entry) == 0) : 0); |
3185942a | 2777 | #endif |
726f6388 JA |
2778 | } |
2779 | ||
2780 | /* Perform the assignment statement in STRING, and expand the | |
95732b49 | 2781 | right side by doing tilde, command and parameter expansion. */ |
ccc6cda3 | 2782 | int |
726f6388 | 2783 | do_assignment (string) |
95732b49 | 2784 | char *string; |
726f6388 | 2785 | { |
95732b49 JA |
2786 | WORD_DESC td; |
2787 | ||
2788 | td.flags = W_ASSIGNMENT; | |
2789 | td.word = string; | |
2790 | ||
2791 | return do_assignment_internal (&td, 1); | |
2792 | } | |
2793 | ||
2794 | int | |
2795 | do_word_assignment (word) | |
2796 | WORD_DESC *word; | |
2797 | { | |
2798 | return do_assignment_internal (word, 1); | |
726f6388 JA |
2799 | } |
2800 | ||
2801 | /* Given STRING, an assignment string, get the value of the right side | |
95732b49 JA |
2802 | of the `=', and bind it to the left side. Do not perform any word |
2803 | expansions on the right hand side. */ | |
ccc6cda3 | 2804 | int |
726f6388 | 2805 | do_assignment_no_expand (string) |
95732b49 | 2806 | char *string; |
726f6388 | 2807 | { |
95732b49 JA |
2808 | WORD_DESC td; |
2809 | ||
2810 | td.flags = W_ASSIGNMENT; | |
2811 | td.word = string; | |
2812 | ||
2813 | return (do_assignment_internal (&td, 0)); | |
726f6388 JA |
2814 | } |
2815 | ||
cce855bc JA |
2816 | /*************************************************** |
2817 | * * | |
2818 | * Functions to manage the positional parameters * | |
2819 | * * | |
2820 | ***************************************************/ | |
726f6388 JA |
2821 | |
2822 | /* Return the word list that corresponds to `$*'. */ | |
2823 | WORD_LIST * | |
2824 | list_rest_of_args () | |
2825 | { | |
ccc6cda3 | 2826 | register WORD_LIST *list, *args; |
726f6388 JA |
2827 | int i; |
2828 | ||
2829 | /* Break out of the loop as soon as one of the dollar variables is null. */ | |
ccc6cda3 JA |
2830 | for (i = 1, list = (WORD_LIST *)NULL; i < 10 && dollar_vars[i]; i++) |
2831 | list = make_word_list (make_bare_word (dollar_vars[i]), list); | |
2832 | ||
2833 | for (args = rest_of_args; args; args = args->next) | |
2834 | list = make_word_list (make_bare_word (args->word->word), list); | |
726f6388 | 2835 | |
726f6388 JA |
2836 | return (REVERSE_LIST (list, WORD_LIST *)); |
2837 | } | |
2838 | ||
ccc6cda3 JA |
2839 | int |
2840 | number_of_args () | |
2841 | { | |
2842 | register WORD_LIST *list; | |
2843 | int n; | |
2844 | ||
2845 | for (n = 0; n < 9 && dollar_vars[n+1]; n++) | |
2846 | ; | |
2847 | for (list = rest_of_args; list; list = list->next) | |
2848 | n++; | |
2849 | return n; | |
2850 | } | |
2851 | ||
cce855bc JA |
2852 | /* Return the value of a positional parameter. This handles values > 10. */ |
2853 | char * | |
2854 | get_dollar_var_value (ind) | |
7117c2d2 | 2855 | intmax_t ind; |
cce855bc JA |
2856 | { |
2857 | char *temp; | |
2858 | WORD_LIST *p; | |
2859 | ||
2860 | if (ind < 10) | |
2861 | temp = dollar_vars[ind] ? savestring (dollar_vars[ind]) : (char *)NULL; | |
2862 | else /* We want something like ${11} */ | |
2863 | { | |
2864 | ind -= 10; | |
2865 | for (p = rest_of_args; p && ind--; p = p->next) | |
28ef6c31 | 2866 | ; |
cce855bc JA |
2867 | temp = p ? savestring (p->word->word) : (char *)NULL; |
2868 | } | |
2869 | return (temp); | |
2870 | } | |
2871 | ||
726f6388 JA |
2872 | /* Make a single large string out of the dollar digit variables, |
2873 | and the rest_of_args. If DOLLAR_STAR is 1, then obey the special | |
2874 | case of "$*" with respect to IFS. */ | |
2875 | char * | |
2876 | string_rest_of_args (dollar_star) | |
2877 | int dollar_star; | |
2878 | { | |
ccc6cda3 | 2879 | register WORD_LIST *list; |
726f6388 JA |
2880 | char *string; |
2881 | ||
ccc6cda3 | 2882 | list = list_rest_of_args (); |
726f6388 JA |
2883 | string = dollar_star ? string_list_dollar_star (list) : string_list (list); |
2884 | dispose_words (list); | |
2885 | return (string); | |
2886 | } | |
2887 | ||
cce855bc JA |
2888 | /* Return a string containing the positional parameters from START to |
2889 | END, inclusive. If STRING[0] == '*', we obey the rules for $*, | |
7117c2d2 JA |
2890 | which only makes a difference if QUOTED is non-zero. If QUOTED includes |
2891 | Q_HERE_DOCUMENT or Q_DOUBLE_QUOTES, this returns a quoted list, otherwise | |
2892 | no quoting chars are added. */ | |
cce855bc JA |
2893 | static char * |
2894 | pos_params (string, start, end, quoted) | |
2895 | char *string; | |
2896 | int start, end, quoted; | |
726f6388 | 2897 | { |
cce855bc JA |
2898 | WORD_LIST *save, *params, *h, *t; |
2899 | char *ret; | |
2900 | int i; | |
726f6388 | 2901 | |
bb70624e JA |
2902 | /* see if we can short-circuit. if start == end, we want 0 parameters. */ |
2903 | if (start == end) | |
2904 | return ((char *)NULL); | |
2905 | ||
cce855bc JA |
2906 | save = params = list_rest_of_args (); |
2907 | if (save == 0) | |
2908 | return ((char *)NULL); | |
2909 | ||
3185942a JA |
2910 | if (start == 0) /* handle ${@:0[:x]} specially */ |
2911 | { | |
2912 | t = make_word_list (make_word (dollar_vars[0]), params); | |
2913 | save = params = t; | |
2914 | } | |
2915 | ||
0001803f | 2916 | for (i = start ? 1 : 0; params && i < start; i++) |
cce855bc JA |
2917 | params = params->next; |
2918 | if (params == 0) | |
2919 | return ((char *)NULL); | |
2920 | for (h = t = params; params && i < end; i++) | |
d166f048 | 2921 | { |
cce855bc JA |
2922 | t = params; |
2923 | params = params->next; | |
d166f048 | 2924 | } |
726f6388 | 2925 | |
cce855bc | 2926 | t->next = (WORD_LIST *)NULL; |
3185942a JA |
2927 | |
2928 | ret = string_list_pos_params (string[0], h, quoted); | |
2929 | ||
bb70624e JA |
2930 | if (t != params) |
2931 | t->next = params; | |
726f6388 | 2932 | |
cce855bc JA |
2933 | dispose_words (save); |
2934 | return (ret); | |
2935 | } | |
2936 | ||
2937 | /******************************************************************/ | |
2938 | /* */ | |
2939 | /* Functions to expand strings to strings or WORD_LISTs */ | |
2940 | /* */ | |
2941 | /******************************************************************/ | |
2942 | ||
2943 | #if defined (PROCESS_SUBSTITUTION) | |
95732b49 | 2944 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == '<' || s == '>' || s == CTLESC || s == '~') |
cce855bc | 2945 | #else |
95732b49 | 2946 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == CTLESC || s == '~') |
cce855bc JA |
2947 | #endif |
2948 | ||
2949 | /* If there are any characters in STRING that require full expansion, | |
2950 | then call FUNC to expand STRING; otherwise just perform quote | |
2951 | removal if necessary. This returns a new string. */ | |
2952 | static char * | |
f73dda09 | 2953 | expand_string_if_necessary (string, quoted, func) |
cce855bc JA |
2954 | char *string; |
2955 | int quoted; | |
f73dda09 | 2956 | EXPFUNC *func; |
cce855bc JA |
2957 | { |
2958 | WORD_LIST *list; | |
7117c2d2 | 2959 | size_t slen; |
cce855bc JA |
2960 | int i, saw_quote; |
2961 | char *ret; | |
7117c2d2 | 2962 | DECLARE_MBSTATE; |
cce855bc | 2963 | |
95732b49 JA |
2964 | /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */ |
2965 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 0; | |
7117c2d2 JA |
2966 | i = saw_quote = 0; |
2967 | while (string[i]) | |
cce855bc JA |
2968 | { |
2969 | if (EXP_CHAR (string[i])) | |
2970 | break; | |
2971 | else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"') | |
2972 | saw_quote = 1; | |
7117c2d2 | 2973 | ADVANCE_CHAR (string, slen, i); |
cce855bc JA |
2974 | } |
2975 | ||
2976 | if (string[i]) | |
2977 | { | |
2978 | list = (*func) (string, quoted); | |
2979 | if (list) | |
2980 | { | |
2981 | ret = string_list (list); | |
2982 | dispose_words (list); | |
2983 | } | |
2984 | else | |
2985 | ret = (char *)NULL; | |
2986 | } | |
2987 | else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
2988 | ret = string_quote_removal (string, quoted); | |
2989 | else | |
2990 | ret = savestring (string); | |
7117c2d2 | 2991 | |
cce855bc JA |
2992 | return ret; |
2993 | } | |
2994 | ||
2995 | static inline char * | |
f73dda09 | 2996 | expand_string_to_string_internal (string, quoted, func) |
cce855bc JA |
2997 | char *string; |
2998 | int quoted; | |
f73dda09 | 2999 | EXPFUNC *func; |
cce855bc JA |
3000 | { |
3001 | WORD_LIST *list; | |
3002 | char *ret; | |
3003 | ||
3004 | if (string == 0 || *string == '\0') | |
3005 | return ((char *)NULL); | |
3006 | ||
3007 | list = (*func) (string, quoted); | |
3008 | if (list) | |
3009 | { | |
3010 | ret = string_list (list); | |
3011 | dispose_words (list); | |
3012 | } | |
3013 | else | |
3014 | ret = (char *)NULL; | |
3015 | ||
3016 | return (ret); | |
3017 | } | |
3018 | ||
f73dda09 JA |
3019 | char * |
3020 | expand_string_to_string (string, quoted) | |
3021 | char *string; | |
3022 | int quoted; | |
3023 | { | |
3024 | return (expand_string_to_string_internal (string, quoted, expand_string)); | |
3025 | } | |
3026 | ||
3027 | char * | |
3028 | expand_string_unsplit_to_string (string, quoted) | |
3029 | char *string; | |
3030 | int quoted; | |
3031 | { | |
3032 | return (expand_string_to_string_internal (string, quoted, expand_string_unsplit)); | |
3033 | } | |
3034 | ||
95732b49 JA |
3035 | char * |
3036 | expand_assignment_string_to_string (string, quoted) | |
3037 | char *string; | |
3038 | int quoted; | |
3039 | { | |
3040 | return (expand_string_to_string_internal (string, quoted, expand_string_assignment)); | |
3041 | } | |
3042 | ||
0628567a JA |
3043 | char * |
3044 | expand_arith_string (string, quoted) | |
3045 | char *string; | |
3185942a | 3046 | int quoted; |
0628567a JA |
3047 | { |
3048 | return (expand_string_if_necessary (string, quoted, expand_string)); | |
3049 | } | |
3050 | ||
cce855bc JA |
3051 | #if defined (COND_COMMAND) |
3052 | /* Just remove backslashes in STRING. Returns a new string. */ | |
3053 | char * | |
3054 | remove_backslashes (string) | |
3055 | char *string; | |
3056 | { | |
3057 | char *r, *ret, *s; | |
3058 | ||
f73dda09 | 3059 | r = ret = (char *)xmalloc (strlen (string) + 1); |
cce855bc JA |
3060 | for (s = string; s && *s; ) |
3061 | { | |
3062 | if (*s == '\\') | |
28ef6c31 | 3063 | s++; |
cce855bc | 3064 | if (*s == 0) |
28ef6c31 | 3065 | break; |
cce855bc JA |
3066 | *r++ = *s++; |
3067 | } | |
3068 | *r = '\0'; | |
3069 | return ret; | |
3070 | } | |
3071 | ||
3072 | /* This needs better error handling. */ | |
3073 | /* Expand W for use as an argument to a unary or binary operator in a | |
f1be666c | 3074 | [[...]] expression. If SPECIAL is 1, this is the rhs argument |
cce855bc | 3075 | to the != or == operator, and should be treated as a pattern. In |
f1be666c JA |
3076 | this case, we quote the string specially for the globbing code. If |
3077 | SPECIAL is 2, this is an rhs argument for the =~ operator, and should | |
3078 | be quoted appropriately for regcomp/regexec. The caller is responsible | |
3079 | for removing the backslashes if the unquoted word is needed later. */ | |
cce855bc JA |
3080 | char * |
3081 | cond_expand_word (w, special) | |
3082 | WORD_DESC *w; | |
3083 | int special; | |
3084 | { | |
3085 | char *r, *p; | |
3086 | WORD_LIST *l; | |
f1be666c | 3087 | int qflags; |
cce855bc JA |
3088 | |
3089 | if (w->word == 0 || w->word[0] == '\0') | |
3090 | return ((char *)NULL); | |
3091 | ||
0001803f | 3092 | w->flags |= W_NOSPLIT2; |
b72432fd | 3093 | l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0); |
cce855bc JA |
3094 | if (l) |
3095 | { | |
3096 | if (special == 0) | |
3097 | { | |
3098 | dequote_list (l); | |
3099 | r = string_list (l); | |
3100 | } | |
3101 | else | |
28ef6c31 | 3102 | { |
f1be666c JA |
3103 | qflags = QGLOB_CVTNULL; |
3104 | if (special == 2) | |
3105 | qflags |= QGLOB_REGEXP; | |
28ef6c31 | 3106 | p = string_list (l); |
f1be666c | 3107 | r = quote_string_for_globbing (p, qflags); |
28ef6c31 JA |
3108 | free (p); |
3109 | } | |
cce855bc JA |
3110 | dispose_words (l); |
3111 | } | |
3112 | else | |
3113 | r = (char *)NULL; | |
3114 | ||
3115 | return r; | |
3116 | } | |
3117 | #endif | |
3118 | ||
3119 | /* Call expand_word_internal to expand W and handle error returns. | |
3120 | A convenience function for functions that don't want to handle | |
3121 | any errors or free any memory before aborting. */ | |
3122 | static WORD_LIST * | |
b72432fd | 3123 | call_expand_word_internal (w, q, i, c, e) |
cce855bc | 3124 | WORD_DESC *w; |
b72432fd | 3125 | int q, i, *c, *e; |
cce855bc JA |
3126 | { |
3127 | WORD_LIST *result; | |
3128 | ||
b72432fd | 3129 | result = expand_word_internal (w, q, i, c, e); |
bb70624e | 3130 | if (result == &expand_word_error || result == &expand_word_fatal) |
cce855bc JA |
3131 | { |
3132 | /* By convention, each time this error is returned, w->word has | |
bb70624e JA |
3133 | already been freed (it sometimes may not be in the fatal case, |
3134 | but that doesn't result in a memory leak because we're going | |
3135 | to exit in most cases). */ | |
cce855bc | 3136 | w->word = (char *)NULL; |
28ef6c31 | 3137 | last_command_exit_value = EXECUTION_FAILURE; |
b80f6443 | 3138 | exp_jump_to_top_level ((result == &expand_word_error) ? DISCARD : FORCE_EOF); |
cce855bc JA |
3139 | /* NOTREACHED */ |
3140 | } | |
cce855bc JA |
3141 | else |
3142 | return (result); | |
3143 | } | |
3144 | ||
3145 | /* Perform parameter expansion, command substitution, and arithmetic | |
3146 | expansion on STRING, as if it were a word. Leave the result quoted. */ | |
3147 | static WORD_LIST * | |
3148 | expand_string_internal (string, quoted) | |
3149 | char *string; | |
3150 | int quoted; | |
3151 | { | |
3152 | WORD_DESC td; | |
3153 | WORD_LIST *tresult; | |
3154 | ||
3155 | if (string == 0 || *string == 0) | |
3156 | return ((WORD_LIST *)NULL); | |
3157 | ||
28ef6c31 JA |
3158 | td.flags = 0; |
3159 | td.word = savestring (string); | |
3160 | ||
b72432fd | 3161 | tresult = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3162 | |
3163 | FREE (td.word); | |
cce855bc | 3164 | return (tresult); |
726f6388 JA |
3165 | } |
3166 | ||
3167 | /* Expand STRING by performing parameter expansion, command substitution, | |
3168 | and arithmetic expansion. Dequote the resulting WORD_LIST before | |
3169 | returning it, but do not perform word splitting. The call to | |
3170 | remove_quoted_nulls () is in here because word splitting normally | |
3171 | takes care of quote removal. */ | |
3172 | WORD_LIST * | |
3173 | expand_string_unsplit (string, quoted) | |
3174 | char *string; | |
3175 | int quoted; | |
3176 | { | |
3177 | WORD_LIST *value; | |
3178 | ||
28ef6c31 | 3179 | if (string == 0 || *string == '\0') |
726f6388 JA |
3180 | return ((WORD_LIST *)NULL); |
3181 | ||
28ef6c31 | 3182 | expand_no_split_dollar_star = 1; |
726f6388 | 3183 | value = expand_string_internal (string, quoted); |
28ef6c31 JA |
3184 | expand_no_split_dollar_star = 0; |
3185 | ||
726f6388 JA |
3186 | if (value) |
3187 | { | |
3188 | if (value->word) | |
95732b49 JA |
3189 | { |
3190 | remove_quoted_nulls (value->word->word); | |
3191 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3192 | } | |
3193 | dequote_list (value); | |
3194 | } | |
3195 | return (value); | |
3196 | } | |
3197 | ||
3198 | /* Expand the rhs of an assignment statement */ | |
3199 | WORD_LIST * | |
3200 | expand_string_assignment (string, quoted) | |
3201 | char *string; | |
3202 | int quoted; | |
3203 | { | |
3204 | WORD_DESC td; | |
3205 | WORD_LIST *value; | |
3206 | ||
3207 | if (string == 0 || *string == '\0') | |
3208 | return ((WORD_LIST *)NULL); | |
3209 | ||
3210 | expand_no_split_dollar_star = 1; | |
3211 | ||
3212 | td.flags = W_ASSIGNRHS; | |
3213 | td.word = savestring (string); | |
3214 | value = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); | |
3215 | FREE (td.word); | |
3216 | ||
3217 | expand_no_split_dollar_star = 0; | |
3218 | ||
3219 | if (value) | |
3220 | { | |
3221 | if (value->word) | |
3222 | { | |
3223 | remove_quoted_nulls (value->word->word); | |
3224 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3225 | } | |
726f6388 JA |
3226 | dequote_list (value); |
3227 | } | |
3228 | return (value); | |
3229 | } | |
3230 | ||
bb70624e JA |
3231 | |
3232 | /* Expand one of the PS? prompt strings. This is a sort of combination of | |
3233 | expand_string_unsplit and expand_string_internal, but returns the | |
3234 | passed string when an error occurs. Might want to trap other calls | |
3235 | to jump_to_top_level here so we don't endlessly loop. */ | |
3236 | WORD_LIST * | |
f1be666c | 3237 | expand_prompt_string (string, quoted, wflags) |
bb70624e JA |
3238 | char *string; |
3239 | int quoted; | |
f1be666c | 3240 | int wflags; |
bb70624e JA |
3241 | { |
3242 | WORD_LIST *value; | |
3243 | WORD_DESC td; | |
3244 | ||
3245 | if (string == 0 || *string == 0) | |
3246 | return ((WORD_LIST *)NULL); | |
3247 | ||
f1be666c | 3248 | td.flags = wflags; |
bb70624e | 3249 | td.word = savestring (string); |
28ef6c31 JA |
3250 | |
3251 | no_longjmp_on_fatal_error = 1; | |
bb70624e | 3252 | value = expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3253 | no_longjmp_on_fatal_error = 0; |
3254 | ||
bb70624e JA |
3255 | if (value == &expand_word_error || value == &expand_word_fatal) |
3256 | { | |
3257 | value = make_word_list (make_bare_word (string), (WORD_LIST *)NULL); | |
3258 | return value; | |
3259 | } | |
3260 | FREE (td.word); | |
3261 | if (value) | |
3262 | { | |
3263 | if (value->word) | |
95732b49 JA |
3264 | { |
3265 | remove_quoted_nulls (value->word->word); | |
3266 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3267 | } | |
bb70624e JA |
3268 | dequote_list (value); |
3269 | } | |
3270 | return (value); | |
3271 | } | |
3272 | ||
726f6388 JA |
3273 | /* Expand STRING just as if you were expanding a word, but do not dequote |
3274 | the resultant WORD_LIST. This is called only from within this file, | |
3275 | and is used to correctly preserve quoted characters when expanding | |
3276 | things like ${1+"$@"}. This does parameter expansion, command | |
b72432fd | 3277 | substitution, arithmetic expansion, and word splitting. */ |
726f6388 JA |
3278 | static WORD_LIST * |
3279 | expand_string_leave_quoted (string, quoted) | |
3280 | char *string; | |
3281 | int quoted; | |
3282 | { | |
3283 | WORD_LIST *tlist; | |
3284 | WORD_LIST *tresult; | |
3285 | ||
ccc6cda3 | 3286 | if (string == 0 || *string == '\0') |
726f6388 JA |
3287 | return ((WORD_LIST *)NULL); |
3288 | ||
3289 | tlist = expand_string_internal (string, quoted); | |
3290 | ||
3291 | if (tlist) | |
3292 | { | |
3293 | tresult = word_list_split (tlist); | |
3294 | dispose_words (tlist); | |
3295 | return (tresult); | |
3296 | } | |
3297 | return ((WORD_LIST *)NULL); | |
3298 | } | |
3299 | ||
ccc6cda3 JA |
3300 | /* This does not perform word splitting or dequote the WORD_LIST |
3301 | it returns. */ | |
3302 | static WORD_LIST * | |
3303 | expand_string_for_rhs (string, quoted, dollar_at_p, has_dollar_at) | |
3304 | char *string; | |
3305 | int quoted, *dollar_at_p, *has_dollar_at; | |
3306 | { | |
3307 | WORD_DESC td; | |
3308 | WORD_LIST *tresult; | |
3309 | ||
3310 | if (string == 0 || *string == '\0') | |
3311 | return (WORD_LIST *)NULL; | |
3312 | ||
28ef6c31 | 3313 | td.flags = 0; |
ccc6cda3 | 3314 | td.word = string; |
b72432fd | 3315 | tresult = call_expand_word_internal (&td, quoted, 1, dollar_at_p, has_dollar_at); |
ccc6cda3 JA |
3316 | return (tresult); |
3317 | } | |
3318 | ||
726f6388 JA |
3319 | /* Expand STRING just as if you were expanding a word. This also returns |
3320 | a list of words. Note that filename globbing is *NOT* done for word | |
3321 | or string expansion, just when the shell is expanding a command. This | |
3322 | does parameter expansion, command substitution, arithmetic expansion, | |
3323 | and word splitting. Dequote the resultant WORD_LIST before returning. */ | |
3324 | WORD_LIST * | |
3325 | expand_string (string, quoted) | |
3326 | char *string; | |
3327 | int quoted; | |
3328 | { | |
3329 | WORD_LIST *result; | |
3330 | ||
28ef6c31 | 3331 | if (string == 0 || *string == '\0') |
726f6388 JA |
3332 | return ((WORD_LIST *)NULL); |
3333 | ||
3334 | result = expand_string_leave_quoted (string, quoted); | |
ccc6cda3 | 3335 | return (result ? dequote_list (result) : result); |
726f6388 JA |
3336 | } |
3337 | ||
3338 | /*************************************************** | |
3339 | * * | |
3340 | * Functions to handle quoting chars * | |
3341 | * * | |
3342 | ***************************************************/ | |
3343 | ||
cce855bc JA |
3344 | /* Conventions: |
3345 | ||
3346 | A string with s[0] == CTLNUL && s[1] == 0 is a quoted null string. | |
3347 | The parser passes CTLNUL as CTLESC CTLNUL. */ | |
3348 | ||
cce855bc JA |
3349 | /* Quote escape characters in string s, but no other characters. This is |
3350 | used to protect CTLESC and CTLNUL in variable values from the rest of | |
3185942a JA |
3351 | the word expansion process after the variable is expanded (word splitting |
3352 | and filename generation). If IFS is null, we quote spaces as well, just | |
3353 | in case we split on spaces later (in the case of unquoted $@, we will | |
3354 | eventually attempt to split the entire word on spaces). Corresponding | |
3355 | code exists in dequote_escapes. Even if we don't end up splitting on | |
3356 | spaces, quoting spaces is not a problem. This should never be called on | |
3357 | a string that is quoted with single or double quotes or part of a here | |
3358 | document (effectively double-quoted). */ | |
f73dda09 | 3359 | char * |
cce855bc JA |
3360 | quote_escapes (string) |
3361 | char *string; | |
3362 | { | |
3363 | register char *s, *t; | |
7117c2d2 JA |
3364 | size_t slen; |
3365 | char *result, *send; | |
3185942a | 3366 | int quote_spaces, skip_ctlesc, skip_ctlnul; |
7117c2d2 | 3367 | DECLARE_MBSTATE; |
cce855bc | 3368 | |
7117c2d2 JA |
3369 | slen = strlen (string); |
3370 | send = string + slen; | |
3371 | ||
f1be666c | 3372 | quote_spaces = (ifs_value && *ifs_value == 0); |
3185942a JA |
3373 | |
3374 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) | |
3375 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
3376 | ||
7117c2d2 JA |
3377 | t = result = (char *)xmalloc ((slen * 2) + 1); |
3378 | s = string; | |
3379 | ||
3380 | while (*s) | |
cce855bc | 3381 | { |
3185942a | 3382 | if ((skip_ctlesc == 0 && *s == CTLESC) || (skip_ctlnul == 0 && *s == CTLNUL) || (quote_spaces && *s == ' ')) |
cce855bc | 3383 | *t++ = CTLESC; |
7117c2d2 | 3384 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3385 | } |
3386 | *t = '\0'; | |
3387 | return (result); | |
3388 | } | |
3389 | ||
3390 | static WORD_LIST * | |
3391 | list_quote_escapes (list) | |
3392 | WORD_LIST *list; | |
3393 | { | |
3394 | register WORD_LIST *w; | |
3395 | char *t; | |
3396 | ||
3397 | for (w = list; w; w = w->next) | |
3398 | { | |
3399 | t = w->word->word; | |
3400 | w->word->word = quote_escapes (t); | |
3401 | free (t); | |
3402 | } | |
3403 | return list; | |
3404 | } | |
3405 | ||
7117c2d2 JA |
3406 | /* Inverse of quote_escapes; remove CTLESC protecting CTLESC or CTLNUL. |
3407 | ||
3408 | The parser passes us CTLESC as CTLESC CTLESC and CTLNUL as CTLESC CTLNUL. | |
3409 | This is necessary to make unquoted CTLESC and CTLNUL characters in the | |
3410 | data stream pass through properly. | |
3411 | ||
3412 | We need to remove doubled CTLESC characters inside quoted strings before | |
3413 | quoting the entire string, so we do not double the number of CTLESC | |
3414 | characters. | |
3415 | ||
3416 | Also used by parts of the pattern substitution code. */ | |
3185942a | 3417 | char * |
cce855bc JA |
3418 | dequote_escapes (string) |
3419 | char *string; | |
3420 | { | |
3185942a | 3421 | register char *s, *t, *s1; |
7117c2d2 JA |
3422 | size_t slen; |
3423 | char *result, *send; | |
f1be666c | 3424 | int quote_spaces; |
7117c2d2 | 3425 | DECLARE_MBSTATE; |
cce855bc | 3426 | |
7117c2d2 JA |
3427 | if (string == 0) |
3428 | return string; | |
3429 | ||
3430 | slen = strlen (string); | |
3431 | send = string + slen; | |
3432 | ||
3433 | t = result = (char *)xmalloc (slen + 1); | |
7117c2d2 JA |
3434 | |
3435 | if (strchr (string, CTLESC) == 0) | |
3185942a | 3436 | return (strcpy (result, string)); |
7117c2d2 | 3437 | |
f1be666c | 3438 | quote_spaces = (ifs_value && *ifs_value == 0); |
3185942a JA |
3439 | |
3440 | s = string; | |
7117c2d2 | 3441 | while (*s) |
cce855bc | 3442 | { |
f1be666c | 3443 | if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' '))) |
cce855bc JA |
3444 | { |
3445 | s++; | |
3446 | if (*s == '\0') | |
3447 | break; | |
3448 | } | |
7117c2d2 | 3449 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3450 | } |
3451 | *t = '\0'; | |
3452 | return result; | |
3453 | } | |
726f6388 | 3454 | |
0628567a JA |
3455 | /* Return a new string with the quoted representation of character C. |
3456 | This turns "" into QUOTED_NULL, so the W_HASQUOTEDNULL flag needs to be | |
3457 | set in any resultant WORD_DESC where this value is the word. */ | |
726f6388 JA |
3458 | static char * |
3459 | make_quoted_char (c) | |
3460 | int c; | |
3461 | { | |
3462 | char *temp; | |
3463 | ||
f73dda09 | 3464 | temp = (char *)xmalloc (3); |
726f6388 JA |
3465 | if (c == 0) |
3466 | { | |
3467 | temp[0] = CTLNUL; | |
3468 | temp[1] = '\0'; | |
3469 | } | |
3470 | else | |
3471 | { | |
3472 | temp[0] = CTLESC; | |
3473 | temp[1] = c; | |
3474 | temp[2] = '\0'; | |
3475 | } | |
3476 | return (temp); | |
3477 | } | |
3478 | ||
0628567a JA |
3479 | /* Quote STRING, returning a new string. This turns "" into QUOTED_NULL, so |
3480 | the W_HASQUOTEDNULL flag needs to be set in any resultant WORD_DESC where | |
3481 | this value is the word. */ | |
ccc6cda3 | 3482 | char * |
726f6388 JA |
3483 | quote_string (string) |
3484 | char *string; | |
3485 | { | |
ccc6cda3 | 3486 | register char *t; |
7117c2d2 JA |
3487 | size_t slen; |
3488 | char *result, *send; | |
726f6388 | 3489 | |
ccc6cda3 | 3490 | if (*string == 0) |
726f6388 | 3491 | { |
f73dda09 | 3492 | result = (char *)xmalloc (2); |
726f6388 JA |
3493 | result[0] = CTLNUL; |
3494 | result[1] = '\0'; | |
3495 | } | |
3496 | else | |
3497 | { | |
7117c2d2 | 3498 | DECLARE_MBSTATE; |
726f6388 | 3499 | |
7117c2d2 JA |
3500 | slen = strlen (string); |
3501 | send = string + slen; | |
3502 | ||
3503 | result = (char *)xmalloc ((slen * 2) + 1); | |
3504 | ||
3505 | for (t = result; string < send; ) | |
726f6388 JA |
3506 | { |
3507 | *t++ = CTLESC; | |
7117c2d2 | 3508 | COPY_CHAR_P (t, string, send); |
726f6388 JA |
3509 | } |
3510 | *t = '\0'; | |
3511 | } | |
3512 | return (result); | |
3513 | } | |
3514 | ||
0628567a | 3515 | /* De-quote quoted characters in STRING. */ |
726f6388 JA |
3516 | char * |
3517 | dequote_string (string) | |
3518 | char *string; | |
3519 | { | |
7117c2d2 JA |
3520 | register char *s, *t; |
3521 | size_t slen; | |
3522 | char *result, *send; | |
3523 | DECLARE_MBSTATE; | |
726f6388 | 3524 | |
7117c2d2 JA |
3525 | slen = strlen (string); |
3526 | ||
3527 | t = result = (char *)xmalloc (slen + 1); | |
726f6388 JA |
3528 | |
3529 | if (QUOTED_NULL (string)) | |
3530 | { | |
3531 | result[0] = '\0'; | |
3532 | return (result); | |
3533 | } | |
3534 | ||
3535 | /* If no character in the string can be quoted, don't bother examining | |
3536 | each character. Just return a copy of the string passed to us. */ | |
7117c2d2 JA |
3537 | if (strchr (string, CTLESC) == NULL) |
3538 | return (strcpy (result, string)); | |
726f6388 | 3539 | |
7117c2d2 JA |
3540 | send = string + slen; |
3541 | s = string; | |
3542 | while (*s) | |
726f6388 | 3543 | { |
7117c2d2 | 3544 | if (*s == CTLESC) |
726f6388 | 3545 | { |
7117c2d2 JA |
3546 | s++; |
3547 | if (*s == '\0') | |
726f6388 JA |
3548 | break; |
3549 | } | |
7117c2d2 | 3550 | COPY_CHAR_P (t, s, send); |
726f6388 JA |
3551 | } |
3552 | ||
3553 | *t = '\0'; | |
3554 | return (result); | |
3555 | } | |
3556 | ||
3557 | /* Quote the entire WORD_LIST list. */ | |
ccc6cda3 | 3558 | static WORD_LIST * |
726f6388 JA |
3559 | quote_list (list) |
3560 | WORD_LIST *list; | |
3561 | { | |
3562 | register WORD_LIST *w; | |
ccc6cda3 | 3563 | char *t; |
726f6388 JA |
3564 | |
3565 | for (w = list; w; w = w->next) | |
3566 | { | |
ccc6cda3 | 3567 | t = w->word->word; |
726f6388 | 3568 | w->word->word = quote_string (t); |
3185942a JA |
3569 | if (*t == 0) |
3570 | w->word->flags |= W_HASQUOTEDNULL; /* XXX - turn on W_HASQUOTEDNULL here? */ | |
ccc6cda3 | 3571 | w->word->flags |= W_QUOTED; |
3185942a | 3572 | free (t); |
726f6388 | 3573 | } |
ccc6cda3 | 3574 | return list; |
726f6388 JA |
3575 | } |
3576 | ||
0628567a JA |
3577 | /* De-quote quoted characters in each word in LIST. */ |
3578 | WORD_LIST * | |
7117c2d2 JA |
3579 | dequote_list (list) |
3580 | WORD_LIST *list; | |
3581 | { | |
3582 | register char *s; | |
3583 | register WORD_LIST *tlist; | |
3584 | ||
3585 | for (tlist = list; tlist; tlist = tlist->next) | |
3586 | { | |
3587 | s = dequote_string (tlist->word->word); | |
3185942a JA |
3588 | if (QUOTED_NULL (tlist->word->word)) |
3589 | tlist->word->flags &= ~W_HASQUOTEDNULL; | |
7117c2d2 JA |
3590 | free (tlist->word->word); |
3591 | tlist->word->word = s; | |
3592 | } | |
3593 | return list; | |
3594 | } | |
3595 | ||
3596 | /* Remove CTLESC protecting a CTLESC or CTLNUL in place. Return the passed | |
3597 | string. */ | |
3185942a | 3598 | char * |
7117c2d2 JA |
3599 | remove_quoted_escapes (string) |
3600 | char *string; | |
3601 | { | |
3602 | char *t; | |
3603 | ||
3604 | if (string) | |
3605 | { | |
3606 | t = dequote_escapes (string); | |
3607 | strcpy (string, t); | |
3608 | free (t); | |
3609 | } | |
3610 | ||
3611 | return (string); | |
3612 | } | |
3613 | ||
cce855bc JA |
3614 | /* Perform quoted null character removal on STRING. We don't allow any |
3615 | quoted null characters in the middle or at the ends of strings because | |
3616 | of how expand_word_internal works. remove_quoted_nulls () turns | |
3617 | STRING into an empty string iff it only consists of a quoted null, | |
3618 | and removes all unquoted CTLNUL characters. */ | |
3185942a | 3619 | char * |
cce855bc JA |
3620 | remove_quoted_nulls (string) |
3621 | char *string; | |
3622 | { | |
7117c2d2 JA |
3623 | register size_t slen; |
3624 | register int i, j, prev_i; | |
3625 | DECLARE_MBSTATE; | |
3626 | ||
3627 | if (strchr (string, CTLNUL) == 0) /* XXX */ | |
3628 | return string; /* XXX */ | |
3629 | ||
3630 | slen = strlen (string); | |
3631 | i = j = 0; | |
3632 | ||
3633 | while (i < slen) | |
3634 | { | |
3635 | if (string[i] == CTLESC) | |
b80f6443 JA |
3636 | { |
3637 | /* Old code had j++, but we cannot assume that i == j at this | |
3638 | point -- what if a CTLNUL has already been removed from the | |
3639 | string? We don't want to drop the CTLESC or recopy characters | |
3640 | that we've already copied down. */ | |
3641 | i++; string[j++] = CTLESC; | |
3642 | if (i == slen) | |
3643 | break; | |
3644 | } | |
7117c2d2 | 3645 | else if (string[i] == CTLNUL) |
b80f6443 | 3646 | i++; |
7117c2d2 JA |
3647 | |
3648 | prev_i = i; | |
3649 | ADVANCE_CHAR (string, slen, i); | |
3650 | if (j < prev_i) | |
cce855bc | 3651 | { |
7117c2d2 | 3652 | do string[j++] = string[prev_i++]; while (prev_i < i); |
cce855bc | 3653 | } |
7117c2d2 JA |
3654 | else |
3655 | j = i; | |
cce855bc | 3656 | } |
7117c2d2 JA |
3657 | string[j] = '\0'; |
3658 | ||
3659 | return (string); | |
cce855bc JA |
3660 | } |
3661 | ||
3662 | /* Perform quoted null character removal on each element of LIST. | |
3663 | This modifies LIST. */ | |
3664 | void | |
3665 | word_list_remove_quoted_nulls (list) | |
3666 | WORD_LIST *list; | |
3667 | { | |
3668 | register WORD_LIST *t; | |
3669 | ||
3670 | for (t = list; t; t = t->next) | |
95732b49 JA |
3671 | { |
3672 | remove_quoted_nulls (t->word->word); | |
3673 | t->word->flags &= ~W_HASQUOTEDNULL; | |
3674 | } | |
cce855bc JA |
3675 | } |
3676 | ||
3677 | /* **************************************************************** */ | |
3678 | /* */ | |
3679 | /* Functions for Matching and Removing Patterns */ | |
3680 | /* */ | |
3681 | /* **************************************************************** */ | |
3682 | ||
b80f6443 JA |
3683 | #if defined (HANDLE_MULTIBYTE) |
3684 | #if 0 /* Currently unused */ | |
3685 | static unsigned char * | |
3686 | mb_getcharlens (string, len) | |
3687 | char *string; | |
3688 | int len; | |
3689 | { | |
3690 | int i, offset, last; | |
3691 | unsigned char *ret; | |
3692 | char *p; | |
3693 | DECLARE_MBSTATE; | |
3694 | ||
3695 | i = offset = 0; | |
3696 | last = 0; | |
3697 | ret = (unsigned char *)xmalloc (len); | |
3698 | memset (ret, 0, len); | |
3699 | while (string[last]) | |
3700 | { | |
3701 | ADVANCE_CHAR (string, len, offset); | |
3702 | ret[last] = offset - last; | |
3703 | last = offset; | |
3704 | } | |
3705 | return ret; | |
3706 | } | |
3707 | #endif | |
3708 | #endif | |
3709 | ||
cce855bc JA |
3710 | /* Remove the portion of PARAM matched by PATTERN according to OP, where OP |
3711 | can have one of 4 values: | |
3712 | RP_LONG_LEFT remove longest matching portion at start of PARAM | |
726f6388 JA |
3713 | RP_SHORT_LEFT remove shortest matching portion at start of PARAM |
3714 | RP_LONG_RIGHT remove longest matching portion at end of PARAM | |
3715 | RP_SHORT_RIGHT remove shortest matching portion at end of PARAM | |
3716 | */ | |
3717 | ||
3718 | #define RP_LONG_LEFT 1 | |
3719 | #define RP_SHORT_LEFT 2 | |
3720 | #define RP_LONG_RIGHT 3 | |
3721 | #define RP_SHORT_RIGHT 4 | |
3722 | ||
3723 | static char * | |
b80f6443 | 3724 | remove_upattern (param, pattern, op) |
726f6388 JA |
3725 | char *param, *pattern; |
3726 | int op; | |
3727 | { | |
ccc6cda3 JA |
3728 | register int len; |
3729 | register char *end; | |
726f6388 JA |
3730 | register char *p, *ret, c; |
3731 | ||
ccc6cda3 JA |
3732 | len = STRLEN (param); |
3733 | end = param + len; | |
726f6388 JA |
3734 | |
3735 | switch (op) | |
3736 | { | |
3737 | case RP_LONG_LEFT: /* remove longest match at start */ | |
3738 | for (p = end; p >= param; p--) | |
3739 | { | |
3740 | c = *p; *p = '\0'; | |
f73dda09 | 3741 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3742 | { |
3743 | *p = c; | |
3744 | return (savestring (p)); | |
3745 | } | |
3746 | *p = c; | |
b80f6443 | 3747 | |
726f6388 JA |
3748 | } |
3749 | break; | |
3750 | ||
3751 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
3752 | for (p = param; p <= end; p++) | |
3753 | { | |
3754 | c = *p; *p = '\0'; | |
f73dda09 | 3755 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3756 | { |
3757 | *p = c; | |
3758 | return (savestring (p)); | |
3759 | } | |
3760 | *p = c; | |
3761 | } | |
3762 | break; | |
3763 | ||
ccc6cda3 JA |
3764 | case RP_LONG_RIGHT: /* remove longest match at end */ |
3765 | for (p = param; p <= end; p++) | |
3766 | { | |
f73dda09 | 3767 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3768 | { |
3769 | c = *p; *p = '\0'; | |
3770 | ret = savestring (param); | |
3771 | *p = c; | |
3772 | return (ret); | |
3773 | } | |
3774 | } | |
3775 | break; | |
3776 | ||
3777 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
3778 | for (p = end; p >= param; p--) | |
3779 | { | |
f73dda09 | 3780 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3781 | { |
3782 | c = *p; *p = '\0'; | |
3783 | ret = savestring (param); | |
3784 | *p = c; | |
3785 | return (ret); | |
3786 | } | |
3787 | } | |
3788 | break; | |
3789 | } | |
b80f6443 | 3790 | |
ccc6cda3 JA |
3791 | return (savestring (param)); /* no match, return original string */ |
3792 | } | |
3793 | ||
b80f6443 | 3794 | #if defined (HANDLE_MULTIBYTE) |
b80f6443 JA |
3795 | static wchar_t * |
3796 | remove_wpattern (wparam, wstrlen, wpattern, op) | |
3797 | wchar_t *wparam; | |
3798 | size_t wstrlen; | |
3799 | wchar_t *wpattern; | |
3800 | int op; | |
3801 | { | |
0628567a JA |
3802 | wchar_t wc, *ret; |
3803 | int n; | |
b80f6443 JA |
3804 | |
3805 | switch (op) | |
3806 | { | |
3807 | case RP_LONG_LEFT: /* remove longest match at start */ | |
3808 | for (n = wstrlen; n >= 0; n--) | |
3809 | { | |
3810 | wc = wparam[n]; wparam[n] = L'\0'; | |
3811 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3812 | { | |
3813 | wparam[n] = wc; | |
3814 | return (wcsdup (wparam + n)); | |
3815 | } | |
3816 | wparam[n] = wc; | |
3817 | } | |
3818 | break; | |
3819 | ||
3820 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
3821 | for (n = 0; n <= wstrlen; n++) | |
3822 | { | |
3823 | wc = wparam[n]; wparam[n] = L'\0'; | |
3824 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3825 | { | |
3826 | wparam[n] = wc; | |
3827 | return (wcsdup (wparam + n)); | |
3828 | } | |
3829 | wparam[n] = wc; | |
3830 | } | |
3831 | break; | |
3832 | ||
3833 | case RP_LONG_RIGHT: /* remove longest match at end */ | |
3834 | for (n = 0; n <= wstrlen; n++) | |
3835 | { | |
3836 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3837 | { | |
3838 | wc = wparam[n]; wparam[n] = L'\0'; | |
3839 | ret = wcsdup (wparam); | |
3840 | wparam[n] = wc; | |
3841 | return (ret); | |
3842 | } | |
3843 | } | |
3844 | break; | |
3845 | ||
3846 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
3847 | for (n = wstrlen; n >= 0; n--) | |
3848 | { | |
3849 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3850 | { | |
3851 | wc = wparam[n]; wparam[n] = L'\0'; | |
3852 | ret = wcsdup (wparam); | |
3853 | wparam[n] = wc; | |
3854 | return (ret); | |
3855 | } | |
3856 | } | |
3857 | break; | |
3858 | } | |
3859 | ||
3860 | return (wcsdup (wparam)); /* no match, return original string */ | |
3861 | } | |
3862 | #endif /* HANDLE_MULTIBYTE */ | |
3863 | ||
3864 | static char * | |
3865 | remove_pattern (param, pattern, op) | |
3866 | char *param, *pattern; | |
3867 | int op; | |
3868 | { | |
3869 | if (param == NULL) | |
3870 | return (param); | |
3871 | if (*param == '\0' || pattern == NULL || *pattern == '\0') /* minor optimization */ | |
3872 | return (savestring (param)); | |
3873 | ||
3874 | #if defined (HANDLE_MULTIBYTE) | |
3875 | if (MB_CUR_MAX > 1) | |
3876 | { | |
3877 | wchar_t *ret, *oret; | |
3878 | size_t n; | |
3879 | wchar_t *wparam, *wpattern; | |
3880 | mbstate_t ps; | |
3881 | char *xret; | |
3882 | ||
3883 | n = xdupmbstowcs (&wpattern, NULL, pattern); | |
3884 | if (n == (size_t)-1) | |
3885 | return (remove_upattern (param, pattern, op)); | |
3886 | n = xdupmbstowcs (&wparam, NULL, param); | |
3887 | if (n == (size_t)-1) | |
3888 | { | |
3889 | free (wpattern); | |
3890 | return (remove_upattern (param, pattern, op)); | |
3891 | } | |
3892 | oret = ret = remove_wpattern (wparam, n, wpattern, op); | |
3893 | ||
3894 | free (wparam); | |
3895 | free (wpattern); | |
3896 | ||
3897 | n = strlen (param); | |
0628567a | 3898 | xret = (char *)xmalloc (n + 1); |
b80f6443 JA |
3899 | memset (&ps, '\0', sizeof (mbstate_t)); |
3900 | n = wcsrtombs (xret, (const wchar_t **)&ret, n, &ps); | |
3901 | xret[n] = '\0'; /* just to make sure */ | |
3902 | free (oret); | |
3903 | return xret; | |
3904 | } | |
3905 | else | |
3906 | #endif | |
3907 | return (remove_upattern (param, pattern, op)); | |
3908 | } | |
3909 | ||
ccc6cda3 | 3910 | /* Return 1 of the first character of STRING could match the first |
f73dda09 | 3911 | character of pattern PAT. Used to avoid n2 calls to strmatch(). */ |
ccc6cda3 JA |
3912 | static int |
3913 | match_pattern_char (pat, string) | |
3914 | char *pat, *string; | |
3915 | { | |
d166f048 | 3916 | char c; |
ccc6cda3 JA |
3917 | |
3918 | if (*string == 0) | |
3919 | return (0); | |
3920 | ||
3921 | switch (c = *pat++) | |
3922 | { | |
3923 | default: | |
3924 | return (*string == c); | |
3925 | case '\\': | |
3926 | return (*string == *pat); | |
3927 | case '?': | |
28ef6c31 | 3928 | return (*pat == LPAREN ? 1 : (*string != '\0')); |
ccc6cda3 JA |
3929 | case '*': |
3930 | return (1); | |
cce855bc JA |
3931 | case '+': |
3932 | case '!': | |
3933 | case '@': | |
28ef6c31 | 3934 | return (*pat == LPAREN ? 1 : (*string == c)); |
ccc6cda3 | 3935 | case '[': |
d166f048 | 3936 | return (*string != '\0'); |
ccc6cda3 JA |
3937 | } |
3938 | } | |
3939 | ||
3940 | /* Match PAT anywhere in STRING and return the match boundaries. | |
3941 | This returns 1 in case of a successful match, 0 otherwise. SP | |
3942 | and EP are pointers into the string where the match begins and | |
3943 | ends, respectively. MTYPE controls what kind of match is attempted. | |
3944 | MATCH_BEG and MATCH_END anchor the match at the beginning and end | |
3945 | of the string, respectively. The longest match is returned. */ | |
3946 | static int | |
b80f6443 | 3947 | match_upattern (string, pat, mtype, sp, ep) |
ccc6cda3 JA |
3948 | char *string, *pat; |
3949 | int mtype; | |
3950 | char **sp, **ep; | |
3951 | { | |
b80f6443 | 3952 | int c, len; |
95732b49 | 3953 | register char *p, *p1, *npat; |
ccc6cda3 JA |
3954 | char *end; |
3955 | ||
95732b49 JA |
3956 | /* If the pattern doesn't match anywhere in the string, go ahead and |
3957 | short-circuit right away. A minor optimization, saves a bunch of | |
3958 | unnecessary calls to strmatch (up to N calls for a string of N | |
3959 | characters) if the match is unsuccessful. To preserve the semantics | |
3960 | of the substring matches below, we make sure that the pattern has | |
3961 | `*' as first and last character, making a new pattern if necessary. */ | |
3962 | /* XXX - check this later if I ever implement `**' with special meaning, | |
3963 | since this will potentially result in `**' at the beginning or end */ | |
3964 | len = STRLEN (pat); | |
0001803f | 3965 | if (pat[0] != '*' || (pat[0] == '*' && pat[1] == LPAREN && extended_glob) || pat[len - 1] != '*') |
95732b49 | 3966 | { |
0628567a | 3967 | p = npat = (char *)xmalloc (len + 3); |
95732b49 | 3968 | p1 = pat; |
0001803f | 3969 | if (*p1 != '*' || (*p1 == '*' && p1[1] == LPAREN && extended_glob)) |
95732b49 JA |
3970 | *p++ = '*'; |
3971 | while (*p1) | |
3972 | *p++ = *p1++; | |
3973 | if (p1[-1] != '*' || p[-2] == '\\') | |
3974 | *p++ = '*'; | |
3975 | *p = '\0'; | |
3976 | } | |
3977 | else | |
3978 | npat = pat; | |
3979 | c = strmatch (npat, string, FNMATCH_EXTFLAG); | |
3980 | if (npat != pat) | |
3981 | free (npat); | |
3982 | if (c == FNM_NOMATCH) | |
3983 | return (0); | |
3984 | ||
b80f6443 JA |
3985 | len = STRLEN (string); |
3986 | end = string + len; | |
ccc6cda3 JA |
3987 | |
3988 | switch (mtype) | |
3989 | { | |
3990 | case MATCH_ANY: | |
3991 | for (p = string; p <= end; p++) | |
3992 | { | |
3993 | if (match_pattern_char (pat, p)) | |
3994 | { | |
3995 | for (p1 = end; p1 >= p; p1--) | |
3996 | { | |
3997 | c = *p1; *p1 = '\0'; | |
f73dda09 | 3998 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
3999 | { |
4000 | *p1 = c; | |
4001 | *sp = p; | |
4002 | *ep = p1; | |
4003 | return 1; | |
4004 | } | |
4005 | *p1 = c; | |
4006 | } | |
4007 | } | |
4008 | } | |
b80f6443 | 4009 | |
ccc6cda3 JA |
4010 | return (0); |
4011 | ||
4012 | case MATCH_BEG: | |
4013 | if (match_pattern_char (pat, string) == 0) | |
28ef6c31 | 4014 | return (0); |
b80f6443 | 4015 | |
ccc6cda3 JA |
4016 | for (p = end; p >= string; p--) |
4017 | { | |
4018 | c = *p; *p = '\0'; | |
f73dda09 | 4019 | if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
4020 | { |
4021 | *p = c; | |
4022 | *sp = string; | |
4023 | *ep = p; | |
4024 | return 1; | |
4025 | } | |
4026 | *p = c; | |
4027 | } | |
b80f6443 | 4028 | |
ccc6cda3 | 4029 | return (0); |
726f6388 | 4030 | |
ccc6cda3 JA |
4031 | case MATCH_END: |
4032 | for (p = string; p <= end; p++) | |
b80f6443 JA |
4033 | { |
4034 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) | |
4035 | { | |
4036 | *sp = p; | |
4037 | *ep = end; | |
4038 | return 1; | |
4039 | } | |
4040 | ||
4041 | } | |
4042 | ||
4043 | return (0); | |
4044 | } | |
4045 | ||
4046 | return (0); | |
4047 | } | |
4048 | ||
4049 | #if defined (HANDLE_MULTIBYTE) | |
4050 | /* Return 1 of the first character of WSTRING could match the first | |
4051 | character of pattern WPAT. Wide character version. */ | |
4052 | static int | |
4053 | match_pattern_wchar (wpat, wstring) | |
4054 | wchar_t *wpat, *wstring; | |
4055 | { | |
4056 | wchar_t wc; | |
4057 | ||
4058 | if (*wstring == 0) | |
4059 | return (0); | |
4060 | ||
4061 | switch (wc = *wpat++) | |
4062 | { | |
4063 | default: | |
4064 | return (*wstring == wc); | |
4065 | case L'\\': | |
4066 | return (*wstring == *wpat); | |
4067 | case L'?': | |
4068 | return (*wpat == LPAREN ? 1 : (*wstring != L'\0')); | |
4069 | case L'*': | |
4070 | return (1); | |
4071 | case L'+': | |
4072 | case L'!': | |
4073 | case L'@': | |
4074 | return (*wpat == LPAREN ? 1 : (*wstring == wc)); | |
4075 | case L'[': | |
4076 | return (*wstring != L'\0'); | |
4077 | } | |
4078 | } | |
4079 | ||
4080 | /* Match WPAT anywhere in WSTRING and return the match boundaries. | |
4081 | This returns 1 in case of a successful match, 0 otherwise. Wide | |
4082 | character version. */ | |
4083 | static int | |
4084 | match_wpattern (wstring, indices, wstrlen, wpat, mtype, sp, ep) | |
4085 | wchar_t *wstring; | |
4086 | char **indices; | |
4087 | size_t wstrlen; | |
4088 | wchar_t *wpat; | |
4089 | int mtype; | |
4090 | char **sp, **ep; | |
4091 | { | |
95732b49 | 4092 | wchar_t wc, *wp, *nwpat, *wp1; |
b80f6443 JA |
4093 | int len; |
4094 | #if 0 | |
4095 | size_t n, n1; /* Apple's gcc seems to miscompile this badly */ | |
4096 | #else | |
4097 | int n, n1; | |
4098 | #endif | |
4099 | ||
95732b49 JA |
4100 | /* If the pattern doesn't match anywhere in the string, go ahead and |
4101 | short-circuit right away. A minor optimization, saves a bunch of | |
4102 | unnecessary calls to strmatch (up to N calls for a string of N | |
4103 | characters) if the match is unsuccessful. To preserve the semantics | |
4104 | of the substring matches below, we make sure that the pattern has | |
4105 | `*' as first and last character, making a new pattern if necessary. */ | |
4106 | /* XXX - check this later if I ever implement `**' with special meaning, | |
4107 | since this will potentially result in `**' at the beginning or end */ | |
4108 | len = wcslen (wpat); | |
0001803f | 4109 | if (wpat[0] != L'*' || (wpat[0] == L'*' && wpat[1] == WLPAREN && extended_glob) || wpat[len - 1] != L'*') |
95732b49 | 4110 | { |
0628567a | 4111 | wp = nwpat = (wchar_t *)xmalloc ((len + 3) * sizeof (wchar_t)); |
95732b49 | 4112 | wp1 = wpat; |
0001803f | 4113 | if (*wp1 != L'*' || (*wp1 == '*' && wp1[1] == WLPAREN && extended_glob)) |
95732b49 JA |
4114 | *wp++ = L'*'; |
4115 | while (*wp1 != L'\0') | |
4116 | *wp++ = *wp1++; | |
4117 | if (wp1[-1] != L'*' || wp1[-2] == L'\\') | |
4118 | *wp++ = L'*'; | |
4119 | *wp = '\0'; | |
4120 | } | |
4121 | else | |
4122 | nwpat = wpat; | |
4123 | len = wcsmatch (nwpat, wstring, FNMATCH_EXTFLAG); | |
4124 | if (nwpat != wpat) | |
4125 | free (nwpat); | |
4126 | if (len == FNM_NOMATCH) | |
4127 | return (0); | |
4128 | ||
b80f6443 JA |
4129 | switch (mtype) |
4130 | { | |
4131 | case MATCH_ANY: | |
4132 | for (n = 0; n <= wstrlen; n++) | |
4133 | { | |
4134 | if (match_pattern_wchar (wpat, wstring + n)) | |
4135 | { | |
4136 | for (n1 = wstrlen; n1 >= n; n1--) | |
4137 | { | |
4138 | wc = wstring[n1]; wstring[n1] = L'\0'; | |
4139 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
4140 | { | |
4141 | wstring[n1] = wc; | |
4142 | *sp = indices[n]; | |
4143 | *ep = indices[n1]; | |
4144 | return 1; | |
4145 | } | |
4146 | wstring[n1] = wc; | |
4147 | } | |
4148 | } | |
4149 | } | |
4150 | ||
4151 | return (0); | |
4152 | ||
4153 | case MATCH_BEG: | |
4154 | if (match_pattern_wchar (wpat, wstring) == 0) | |
4155 | return (0); | |
4156 | ||
4157 | for (n = wstrlen; n >= 0; n--) | |
4158 | { | |
4159 | wc = wstring[n]; wstring[n] = L'\0'; | |
4160 | if (wcsmatch (wpat, wstring, FNMATCH_EXTFLAG) == 0) | |
4161 | { | |
4162 | wstring[n] = wc; | |
4163 | *sp = indices[0]; | |
4164 | *ep = indices[n]; | |
4165 | return 1; | |
4166 | } | |
4167 | wstring[n] = wc; | |
4168 | } | |
4169 | ||
4170 | return (0); | |
4171 | ||
4172 | case MATCH_END: | |
4173 | for (n = 0; n <= wstrlen; n++) | |
4174 | { | |
4175 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
4176 | { | |
4177 | *sp = indices[n]; | |
4178 | *ep = indices[wstrlen]; | |
4179 | return 1; | |
4180 | } | |
4181 | } | |
4182 | ||
ccc6cda3 | 4183 | return (0); |
726f6388 | 4184 | } |
ccc6cda3 JA |
4185 | |
4186 | return (0); | |
726f6388 | 4187 | } |
b80f6443 JA |
4188 | #endif /* HANDLE_MULTIBYTE */ |
4189 | ||
4190 | static int | |
4191 | match_pattern (string, pat, mtype, sp, ep) | |
4192 | char *string, *pat; | |
4193 | int mtype; | |
4194 | char **sp, **ep; | |
4195 | { | |
4196 | #if defined (HANDLE_MULTIBYTE) | |
4197 | int ret; | |
4198 | size_t n; | |
4199 | wchar_t *wstring, *wpat; | |
4200 | char **indices; | |
4201 | #endif | |
4202 | ||
4203 | if (string == 0 || *string == 0 || pat == 0 || *pat == 0) | |
4204 | return (0); | |
4205 | ||
4206 | #if defined (HANDLE_MULTIBYTE) | |
4207 | if (MB_CUR_MAX > 1) | |
4208 | { | |
4209 | n = xdupmbstowcs (&wpat, NULL, pat); | |
4210 | if (n == (size_t)-1) | |
4211 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4212 | n = xdupmbstowcs (&wstring, &indices, string); | |
4213 | if (n == (size_t)-1) | |
4214 | { | |
4215 | free (wpat); | |
4216 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4217 | } | |
4218 | ret = match_wpattern (wstring, indices, n, wpat, mtype, sp, ep); | |
4219 | ||
4220 | free (wpat); | |
4221 | free (wstring); | |
4222 | free (indices); | |
4223 | ||
4224 | return (ret); | |
4225 | } | |
4226 | else | |
4227 | #endif | |
4228 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4229 | } | |
726f6388 | 4230 | |
cce855bc JA |
4231 | static int |
4232 | getpatspec (c, value) | |
4233 | int c; | |
4234 | char *value; | |
4235 | { | |
4236 | if (c == '#') | |
4237 | return ((*value == '#') ? RP_LONG_LEFT : RP_SHORT_LEFT); | |
4238 | else /* c == '%' */ | |
4239 | return ((*value == '%') ? RP_LONG_RIGHT : RP_SHORT_RIGHT); | |
4240 | } | |
4241 | ||
4242 | /* Posix.2 says that the WORD should be run through tilde expansion, | |
4243 | parameter expansion, command substitution and arithmetic expansion. | |
4244 | This leaves the result quoted, so quote_string_for_globbing () has | |
f73dda09 | 4245 | to be called to fix it up for strmatch (). If QUOTED is non-zero, |
cce855bc JA |
4246 | it means that the entire expression was enclosed in double quotes. |
4247 | This means that quoting characters in the pattern do not make any | |
4248 | special pattern characters quoted. For example, the `*' in the | |
4249 | following retains its special meaning: "${foo#'*'}". */ | |
4250 | static char * | |
4251 | getpattern (value, quoted, expandpat) | |
4252 | char *value; | |
4253 | int quoted, expandpat; | |
4254 | { | |
4255 | char *pat, *tword; | |
4256 | WORD_LIST *l; | |
0628567a | 4257 | #if 0 |
cce855bc | 4258 | int i; |
0628567a | 4259 | #endif |
7117c2d2 JA |
4260 | /* There is a problem here: how to handle single or double quotes in the |
4261 | pattern string when the whole expression is between double quotes? | |
4262 | POSIX.2 says that enclosing double quotes do not cause the pattern to | |
4263 | be quoted, but does that leave us a problem with @ and array[@] and their | |
4264 | expansions inside a pattern? */ | |
4265 | #if 0 | |
cce855bc JA |
4266 | if (expandpat && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *tword) |
4267 | { | |
4268 | i = 0; | |
4269 | pat = string_extract_double_quoted (tword, &i, 1); | |
4270 | free (tword); | |
4271 | tword = pat; | |
4272 | } | |
7117c2d2 | 4273 | #endif |
cce855bc | 4274 | |
7117c2d2 JA |
4275 | /* expand_string_for_rhs () leaves WORD quoted and does not perform |
4276 | word splitting. */ | |
95732b49 | 4277 | l = *value ? expand_string_for_rhs (value, |
7117c2d2 | 4278 | (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? Q_PATQUOTE : quoted, |
cce855bc | 4279 | (int *)NULL, (int *)NULL) |
cce855bc | 4280 | : (WORD_LIST *)0; |
cce855bc JA |
4281 | pat = string_list (l); |
4282 | dispose_words (l); | |
4283 | if (pat) | |
4284 | { | |
4285 | tword = quote_string_for_globbing (pat, QGLOB_CVTNULL); | |
4286 | free (pat); | |
4287 | pat = tword; | |
4288 | } | |
4289 | return (pat); | |
4290 | } | |
4291 | ||
7117c2d2 | 4292 | #if 0 |
cce855bc JA |
4293 | /* Handle removing a pattern from a string as a result of ${name%[%]value} |
4294 | or ${name#[#]value}. */ | |
4295 | static char * | |
7117c2d2 JA |
4296 | variable_remove_pattern (value, pattern, patspec, quoted) |
4297 | char *value, *pattern; | |
4298 | int patspec, quoted; | |
cce855bc | 4299 | { |
7117c2d2 | 4300 | char *tword; |
cce855bc | 4301 | |
7117c2d2 | 4302 | tword = remove_pattern (value, pattern, patspec); |
cce855bc | 4303 | |
cce855bc JA |
4304 | return (tword); |
4305 | } | |
7117c2d2 | 4306 | #endif |
cce855bc JA |
4307 | |
4308 | static char * | |
7117c2d2 | 4309 | list_remove_pattern (list, pattern, patspec, itype, quoted) |
cce855bc JA |
4310 | WORD_LIST *list; |
4311 | char *pattern; | |
7117c2d2 | 4312 | int patspec, itype, quoted; |
cce855bc JA |
4313 | { |
4314 | WORD_LIST *new, *l; | |
4315 | WORD_DESC *w; | |
4316 | char *tword; | |
4317 | ||
4318 | for (new = (WORD_LIST *)NULL, l = list; l; l = l->next) | |
4319 | { | |
4320 | tword = remove_pattern (l->word->word, pattern, patspec); | |
95732b49 JA |
4321 | w = alloc_word_desc (); |
4322 | w->word = tword ? tword : savestring (""); | |
cce855bc JA |
4323 | new = make_word_list (w, new); |
4324 | } | |
4325 | ||
4326 | l = REVERSE_LIST (new, WORD_LIST *); | |
3185942a | 4327 | tword = string_list_pos_params (itype, l, quoted); |
cce855bc | 4328 | dispose_words (l); |
3185942a | 4329 | |
cce855bc JA |
4330 | return (tword); |
4331 | } | |
4332 | ||
4333 | static char * | |
7117c2d2 JA |
4334 | parameter_list_remove_pattern (itype, pattern, patspec, quoted) |
4335 | int itype; | |
4336 | char *pattern; | |
4337 | int patspec, quoted; | |
cce855bc | 4338 | { |
7117c2d2 | 4339 | char *ret; |
cce855bc JA |
4340 | WORD_LIST *list; |
4341 | ||
cce855bc | 4342 | list = list_rest_of_args (); |
7117c2d2 JA |
4343 | if (list == 0) |
4344 | return ((char *)NULL); | |
4345 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
cce855bc | 4346 | dispose_words (list); |
cce855bc JA |
4347 | return (ret); |
4348 | } | |
4349 | ||
4350 | #if defined (ARRAY_VARS) | |
4351 | static char * | |
3185942a JA |
4352 | array_remove_pattern (var, pattern, patspec, varname, quoted) |
4353 | SHELL_VAR *var; | |
7117c2d2 JA |
4354 | char *pattern; |
4355 | int patspec; | |
4356 | char *varname; /* so we can figure out how it's indexed */ | |
4357 | int quoted; | |
cce855bc | 4358 | { |
3185942a JA |
4359 | ARRAY *a; |
4360 | HASH_TABLE *h; | |
7117c2d2 JA |
4361 | int itype; |
4362 | char *ret; | |
4363 | WORD_LIST *list; | |
4364 | SHELL_VAR *v; | |
cce855bc | 4365 | |
7117c2d2 JA |
4366 | /* compute itype from varname here */ |
4367 | v = array_variable_part (varname, &ret, 0); | |
4368 | itype = ret[0]; | |
4369 | ||
3185942a JA |
4370 | a = (v && array_p (v)) ? array_cell (v) : 0; |
4371 | h = (v && assoc_p (v)) ? assoc_cell (v) : 0; | |
4372 | ||
4373 | list = a ? array_to_word_list (a) : (h ? assoc_to_word_list (h) : 0); | |
7117c2d2 JA |
4374 | if (list == 0) |
4375 | return ((char *)NULL); | |
4376 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
4377 | dispose_words (list); | |
4378 | ||
4379 | return ret; | |
4380 | } | |
4381 | #endif /* ARRAY_VARS */ | |
4382 | ||
4383 | static char * | |
4384 | parameter_brace_remove_pattern (varname, value, patstr, rtype, quoted) | |
4385 | char *varname, *value, *patstr; | |
4386 | int rtype, quoted; | |
4387 | { | |
b80f6443 | 4388 | int vtype, patspec, starsub; |
7117c2d2 JA |
4389 | char *temp1, *val, *pattern; |
4390 | SHELL_VAR *v; | |
4391 | ||
4392 | if (value == 0) | |
4393 | return ((char *)NULL); | |
4394 | ||
4395 | this_command_name = varname; | |
4396 | ||
b80f6443 | 4397 | vtype = get_var_and_type (varname, value, quoted, &v, &val); |
7117c2d2 | 4398 | if (vtype == -1) |
cce855bc JA |
4399 | return ((char *)NULL); |
4400 | ||
b80f6443 JA |
4401 | starsub = vtype & VT_STARSUB; |
4402 | vtype &= ~VT_STARSUB; | |
4403 | ||
7117c2d2 | 4404 | patspec = getpatspec (rtype, patstr); |
cce855bc | 4405 | if (patspec == RP_LONG_LEFT || patspec == RP_LONG_RIGHT) |
7117c2d2 | 4406 | patstr++; |
cce855bc | 4407 | |
f1be666c JA |
4408 | /* Need to pass getpattern newly-allocated memory in case of expansion -- |
4409 | the expansion code will free the passed string on an error. */ | |
4410 | temp1 = savestring (patstr); | |
4411 | pattern = getpattern (temp1, quoted, 1); | |
4412 | free (temp1); | |
cce855bc | 4413 | |
7117c2d2 JA |
4414 | temp1 = (char *)NULL; /* shut up gcc */ |
4415 | switch (vtype) | |
cce855bc | 4416 | { |
7117c2d2 JA |
4417 | case VT_VARIABLE: |
4418 | case VT_ARRAYMEMBER: | |
4419 | temp1 = remove_pattern (val, pattern, patspec); | |
4420 | if (vtype == VT_VARIABLE) | |
4421 | FREE (val); | |
4422 | if (temp1) | |
28ef6c31 | 4423 | { |
3185942a JA |
4424 | val = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
4425 | ? quote_string (temp1) | |
4426 | : quote_escapes (temp1); | |
7117c2d2 JA |
4427 | free (temp1); |
4428 | temp1 = val; | |
28ef6c31 | 4429 | } |
7117c2d2 JA |
4430 | break; |
4431 | #if defined (ARRAY_VARS) | |
4432 | case VT_ARRAYVAR: | |
3185942a | 4433 | temp1 = array_remove_pattern (v, pattern, patspec, varname, quoted); |
7117c2d2 | 4434 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) |
cce855bc | 4435 | { |
7117c2d2 JA |
4436 | val = quote_escapes (temp1); |
4437 | free (temp1); | |
4438 | temp1 = val; | |
cce855bc | 4439 | } |
7117c2d2 JA |
4440 | break; |
4441 | #endif | |
4442 | case VT_POSPARMS: | |
4443 | temp1 = parameter_list_remove_pattern (varname[0], pattern, patspec, quoted); | |
4444 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
4445 | { | |
4446 | val = quote_escapes (temp1); | |
4447 | free (temp1); | |
4448 | temp1 = val; | |
4449 | } | |
4450 | break; | |
cce855bc JA |
4451 | } |
4452 | ||
4453 | FREE (pattern); | |
7117c2d2 JA |
4454 | return temp1; |
4455 | } | |
cce855bc | 4456 | |
726f6388 JA |
4457 | /******************************************* |
4458 | * * | |
4459 | * Functions to expand WORD_DESCs * | |
4460 | * * | |
4461 | *******************************************/ | |
4462 | ||
4463 | /* Expand WORD, performing word splitting on the result. This does | |
4464 | parameter expansion, command substitution, arithmetic expansion, | |
4465 | word splitting, and quote removal. */ | |
4466 | ||
4467 | WORD_LIST * | |
4468 | expand_word (word, quoted) | |
4469 | WORD_DESC *word; | |
4470 | int quoted; | |
4471 | { | |
4472 | WORD_LIST *result, *tresult; | |
4473 | ||
b72432fd | 4474 | tresult = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
726f6388 JA |
4475 | result = word_list_split (tresult); |
4476 | dispose_words (tresult); | |
ccc6cda3 | 4477 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4478 | } |
4479 | ||
4480 | /* Expand WORD, but do not perform word splitting on the result. This | |
4481 | does parameter expansion, command substitution, arithmetic expansion, | |
4482 | and quote removal. */ | |
4483 | WORD_LIST * | |
28ef6c31 | 4484 | expand_word_unsplit (word, quoted) |
726f6388 JA |
4485 | WORD_DESC *word; |
4486 | int quoted; | |
4487 | { | |
4488 | WORD_LIST *result; | |
4489 | ||
28ef6c31 | 4490 | expand_no_split_dollar_star = 1; |
0001803f CR |
4491 | #if defined (HANDLE_MULTIBYTE) |
4492 | if (ifs_firstc[0] == 0) | |
4493 | #else | |
4494 | if (ifs_firstc == 0) | |
4495 | #endif | |
4496 | word->flags |= W_NOSPLIT; | |
b72432fd | 4497 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 | 4498 | expand_no_split_dollar_star = 0; |
7117c2d2 | 4499 | |
ccc6cda3 | 4500 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4501 | } |
4502 | ||
4503 | /* Perform shell expansions on WORD, but do not perform word splitting or | |
0001803f CR |
4504 | quote removal on the result. Virtually identical to expand_word_unsplit; |
4505 | could be combined if implementations don't diverge. */ | |
726f6388 JA |
4506 | WORD_LIST * |
4507 | expand_word_leave_quoted (word, quoted) | |
4508 | WORD_DESC *word; | |
4509 | int quoted; | |
4510 | { | |
0001803f CR |
4511 | WORD_LIST *result; |
4512 | ||
4513 | expand_no_split_dollar_star = 1; | |
4514 | #if defined (HANDLE_MULTIBYTE) | |
4515 | if (ifs_firstc[0] == 0) | |
4516 | #else | |
4517 | if (ifs_firstc == 0) | |
4518 | #endif | |
4519 | word->flags |= W_NOSPLIT; | |
4520 | word->flags |= W_NOSPLIT2; | |
4521 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); | |
4522 | expand_no_split_dollar_star = 0; | |
4523 | ||
4524 | return result; | |
726f6388 JA |
4525 | } |
4526 | ||
726f6388 JA |
4527 | #if defined (PROCESS_SUBSTITUTION) |
4528 | ||
cce855bc JA |
4529 | /*****************************************************************/ |
4530 | /* */ | |
4531 | /* Hacking Process Substitution */ | |
4532 | /* */ | |
4533 | /*****************************************************************/ | |
726f6388 | 4534 | |
726f6388 JA |
4535 | #if !defined (HAVE_DEV_FD) |
4536 | /* Named pipes must be removed explicitly with `unlink'. This keeps a list | |
4537 | of FIFOs the shell has open. unlink_fifo_list will walk the list and | |
4538 | unlink all of them. add_fifo_list adds the name of an open FIFO to the | |
4539 | list. NFIFO is a count of the number of FIFOs in the list. */ | |
4540 | #define FIFO_INCR 20 | |
4541 | ||
f73dda09 JA |
4542 | struct temp_fifo { |
4543 | char *file; | |
4544 | pid_t proc; | |
4545 | }; | |
4546 | ||
4547 | static struct temp_fifo *fifo_list = (struct temp_fifo *)NULL; | |
ccc6cda3 JA |
4548 | static int nfifo; |
4549 | static int fifo_list_size; | |
726f6388 JA |
4550 | |
4551 | static void | |
4552 | add_fifo_list (pathname) | |
4553 | char *pathname; | |
4554 | { | |
4555 | if (nfifo >= fifo_list_size - 1) | |
4556 | { | |
4557 | fifo_list_size += FIFO_INCR; | |
f73dda09 JA |
4558 | fifo_list = (struct temp_fifo *)xrealloc (fifo_list, |
4559 | fifo_list_size * sizeof (struct temp_fifo)); | |
726f6388 JA |
4560 | } |
4561 | ||
f73dda09 JA |
4562 | fifo_list[nfifo].file = savestring (pathname); |
4563 | nfifo++; | |
726f6388 JA |
4564 | } |
4565 | ||
4566 | void | |
4567 | unlink_fifo_list () | |
4568 | { | |
f73dda09 JA |
4569 | int saved, i, j; |
4570 | ||
ccc6cda3 | 4571 | if (nfifo == 0) |
726f6388 JA |
4572 | return; |
4573 | ||
f73dda09 | 4574 | for (i = saved = 0; i < nfifo; i++) |
726f6388 | 4575 | { |
f73dda09 JA |
4576 | if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1)) |
4577 | { | |
7117c2d2 JA |
4578 | unlink (fifo_list[i].file); |
4579 | free (fifo_list[i].file); | |
4580 | fifo_list[i].file = (char *)NULL; | |
4581 | fifo_list[i].proc = -1; | |
f73dda09 JA |
4582 | } |
4583 | else | |
7117c2d2 | 4584 | saved++; |
f73dda09 JA |
4585 | } |
4586 | ||
4587 | /* If we didn't remove some of the FIFOs, compact the list. */ | |
4588 | if (saved) | |
4589 | { | |
4590 | for (i = j = 0; i < nfifo; i++) | |
4591 | if (fifo_list[i].file) | |
4592 | { | |
4593 | fifo_list[j].file = fifo_list[i].file; | |
4594 | fifo_list[j].proc = fifo_list[i].proc; | |
4595 | j++; | |
4596 | } | |
4597 | nfifo = j; | |
726f6388 | 4598 | } |
f73dda09 JA |
4599 | else |
4600 | nfifo = 0; | |
726f6388 JA |
4601 | } |
4602 | ||
f1be666c JA |
4603 | int |
4604 | fifos_pending () | |
4605 | { | |
4606 | return nfifo; | |
4607 | } | |
4608 | ||
726f6388 JA |
4609 | static char * |
4610 | make_named_pipe () | |
4611 | { | |
4612 | char *tname; | |
4613 | ||
3185942a | 4614 | tname = sh_mktmpname ("sh-np", MT_USERANDOM|MT_USETMPDIR); |
726f6388 JA |
4615 | if (mkfifo (tname, 0600) < 0) |
4616 | { | |
4617 | free (tname); | |
4618 | return ((char *)NULL); | |
4619 | } | |
4620 | ||
4621 | add_fifo_list (tname); | |
4622 | return (tname); | |
4623 | } | |
4624 | ||
726f6388 JA |
4625 | #else /* HAVE_DEV_FD */ |
4626 | ||
4627 | /* DEV_FD_LIST is a bitmap of file descriptors attached to pipes the shell | |
4628 | has open to children. NFDS is a count of the number of bits currently | |
4629 | set in DEV_FD_LIST. TOTFDS is a count of the highest possible number | |
4630 | of open files. */ | |
4631 | static char *dev_fd_list = (char *)NULL; | |
ccc6cda3 | 4632 | static int nfds; |
726f6388 JA |
4633 | static int totfds; /* The highest possible number of open files. */ |
4634 | ||
4635 | static void | |
4636 | add_fifo_list (fd) | |
4637 | int fd; | |
4638 | { | |
4639 | if (!dev_fd_list || fd >= totfds) | |
4640 | { | |
4641 | int ofds; | |
4642 | ||
4643 | ofds = totfds; | |
4644 | totfds = getdtablesize (); | |
4645 | if (totfds < 0 || totfds > 256) | |
4646 | totfds = 256; | |
3185942a | 4647 | if (fd >= totfds) |
726f6388 JA |
4648 | totfds = fd + 2; |
4649 | ||
f73dda09 | 4650 | dev_fd_list = (char *)xrealloc (dev_fd_list, totfds); |
7117c2d2 | 4651 | memset (dev_fd_list + ofds, '\0', totfds - ofds); |
726f6388 JA |
4652 | } |
4653 | ||
4654 | dev_fd_list[fd] = 1; | |
4655 | nfds++; | |
4656 | } | |
4657 | ||
f1be666c JA |
4658 | int |
4659 | fifos_pending () | |
4660 | { | |
4661 | return 0; /* used for cleanup; not needed with /dev/fd */ | |
4662 | } | |
4663 | ||
726f6388 JA |
4664 | void |
4665 | unlink_fifo_list () | |
4666 | { | |
4667 | register int i; | |
4668 | ||
ccc6cda3 | 4669 | if (nfds == 0) |
726f6388 JA |
4670 | return; |
4671 | ||
4672 | for (i = 0; nfds && i < totfds; i++) | |
4673 | if (dev_fd_list[i]) | |
4674 | { | |
4675 | close (i); | |
4676 | dev_fd_list[i] = 0; | |
4677 | nfds--; | |
4678 | } | |
4679 | ||
4680 | nfds = 0; | |
4681 | } | |
4682 | ||
4683 | #if defined (NOTDEF) | |
4684 | print_dev_fd_list () | |
4685 | { | |
4686 | register int i; | |
4687 | ||
f73dda09 | 4688 | fprintf (stderr, "pid %ld: dev_fd_list:", (long)getpid ()); |
726f6388 JA |
4689 | fflush (stderr); |
4690 | ||
4691 | for (i = 0; i < totfds; i++) | |
4692 | { | |
4693 | if (dev_fd_list[i]) | |
4694 | fprintf (stderr, " %d", i); | |
4695 | } | |
4696 | fprintf (stderr, "\n"); | |
4697 | } | |
4698 | #endif /* NOTDEF */ | |
4699 | ||
4700 | static char * | |
4701 | make_dev_fd_filename (fd) | |
4702 | int fd; | |
4703 | { | |
f73dda09 | 4704 | char *ret, intbuf[INT_STRLEN_BOUND (int) + 1], *p; |
726f6388 | 4705 | |
17345e5a | 4706 | ret = (char *)xmalloc (sizeof (DEV_FD_PREFIX) + 8); |
bb70624e JA |
4707 | |
4708 | strcpy (ret, DEV_FD_PREFIX); | |
4709 | p = inttostr (fd, intbuf, sizeof (intbuf)); | |
4710 | strcpy (ret + sizeof (DEV_FD_PREFIX) - 1, p); | |
4711 | ||
726f6388 JA |
4712 | add_fifo_list (fd); |
4713 | return (ret); | |
4714 | } | |
4715 | ||
4716 | #endif /* HAVE_DEV_FD */ | |
4717 | ||
4718 | /* Return a filename that will open a connection to the process defined by | |
4719 | executing STRING. HAVE_DEV_FD, if defined, means open a pipe and return | |
4720 | a filename in /dev/fd corresponding to a descriptor that is one of the | |
4721 | ends of the pipe. If not defined, we use named pipes on systems that have | |
4722 | them. Systems without /dev/fd and named pipes are out of luck. | |
4723 | ||
4724 | OPEN_FOR_READ_IN_CHILD, if 1, means open the named pipe for reading or | |
4725 | use the read end of the pipe and dup that file descriptor to fd 0 in | |
4726 | the child. If OPEN_FOR_READ_IN_CHILD is 0, we open the named pipe for | |
4727 | writing or use the write end of the pipe in the child, and dup that | |
4728 | file descriptor to fd 1 in the child. The parent does the opposite. */ | |
4729 | ||
4730 | static char * | |
4731 | process_substitute (string, open_for_read_in_child) | |
4732 | char *string; | |
4733 | int open_for_read_in_child; | |
4734 | { | |
4735 | char *pathname; | |
4736 | int fd, result; | |
4737 | pid_t old_pid, pid; | |
4738 | #if defined (HAVE_DEV_FD) | |
4739 | int parent_pipe_fd, child_pipe_fd; | |
4740 | int fildes[2]; | |
4741 | #endif /* HAVE_DEV_FD */ | |
4742 | #if defined (JOB_CONTROL) | |
4743 | pid_t old_pipeline_pgrp; | |
ccc6cda3 | 4744 | #endif |
726f6388 | 4745 | |
cce855bc | 4746 | if (!string || !*string || wordexp_only) |
726f6388 JA |
4747 | return ((char *)NULL); |
4748 | ||
4749 | #if !defined (HAVE_DEV_FD) | |
4750 | pathname = make_named_pipe (); | |
4751 | #else /* HAVE_DEV_FD */ | |
4752 | if (pipe (fildes) < 0) | |
4753 | { | |
b80f6443 | 4754 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
4755 | return ((char *)NULL); |
4756 | } | |
4757 | /* If OPEN_FOR_READ_IN_CHILD == 1, we want to use the write end of | |
4758 | the pipe in the parent, otherwise the read end. */ | |
4759 | parent_pipe_fd = fildes[open_for_read_in_child]; | |
4760 | child_pipe_fd = fildes[1 - open_for_read_in_child]; | |
d166f048 JA |
4761 | /* Move the parent end of the pipe to some high file descriptor, to |
4762 | avoid clashes with FDs used by the script. */ | |
4763 | parent_pipe_fd = move_to_high_fd (parent_pipe_fd, 1, 64); | |
4764 | ||
726f6388 JA |
4765 | pathname = make_dev_fd_filename (parent_pipe_fd); |
4766 | #endif /* HAVE_DEV_FD */ | |
4767 | ||
3185942a | 4768 | if (pathname == 0) |
726f6388 | 4769 | { |
b80f6443 | 4770 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
4771 | return ((char *)NULL); |
4772 | } | |
4773 | ||
4774 | old_pid = last_made_pid; | |
4775 | ||
4776 | #if defined (JOB_CONTROL) | |
4777 | old_pipeline_pgrp = pipeline_pgrp; | |
4778 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 4779 | save_pipeline (1); |
ccc6cda3 JA |
4780 | #endif /* JOB_CONTROL */ |
4781 | ||
726f6388 JA |
4782 | pid = make_child ((char *)NULL, 1); |
4783 | if (pid == 0) | |
4784 | { | |
ccc6cda3 | 4785 | reset_terminating_signals (); /* XXX */ |
b80f6443 | 4786 | free_pushed_string_input (); |
726f6388 JA |
4787 | /* Cancel traps, in trap.c. */ |
4788 | restore_original_signals (); | |
4789 | setup_async_signals (); | |
3185942a | 4790 | subshell_environment |= SUBSHELL_COMSUB|SUBSHELL_PROCSUB; |
726f6388 | 4791 | } |
ccc6cda3 JA |
4792 | |
4793 | #if defined (JOB_CONTROL) | |
726f6388 JA |
4794 | set_sigchld_handler (); |
4795 | stop_making_children (); | |
3185942a | 4796 | /* XXX - should we only do this in the parent? (as in command subst) */ |
726f6388 | 4797 | pipeline_pgrp = old_pipeline_pgrp; |
ccc6cda3 | 4798 | #endif /* JOB_CONTROL */ |
726f6388 JA |
4799 | |
4800 | if (pid < 0) | |
4801 | { | |
b80f6443 | 4802 | sys_error (_("cannot make child for process substitution")); |
726f6388 JA |
4803 | free (pathname); |
4804 | #if defined (HAVE_DEV_FD) | |
4805 | close (parent_pipe_fd); | |
4806 | close (child_pipe_fd); | |
4807 | #endif /* HAVE_DEV_FD */ | |
4808 | return ((char *)NULL); | |
4809 | } | |
4810 | ||
4811 | if (pid > 0) | |
4812 | { | |
ccc6cda3 JA |
4813 | #if defined (JOB_CONTROL) |
4814 | restore_pipeline (1); | |
4815 | #endif | |
4816 | ||
f73dda09 JA |
4817 | #if !defined (HAVE_DEV_FD) |
4818 | fifo_list[nfifo-1].proc = pid; | |
4819 | #endif | |
4820 | ||
726f6388 JA |
4821 | last_made_pid = old_pid; |
4822 | ||
4823 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) | |
4824 | close_pgrp_pipe (); | |
4825 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
4826 | ||
4827 | #if defined (HAVE_DEV_FD) | |
4828 | close (child_pipe_fd); | |
4829 | #endif /* HAVE_DEV_FD */ | |
4830 | ||
4831 | return (pathname); | |
4832 | } | |
4833 | ||
4834 | set_sigint_handler (); | |
4835 | ||
4836 | #if defined (JOB_CONTROL) | |
4837 | set_job_control (0); | |
4838 | #endif /* JOB_CONTROL */ | |
4839 | ||
4840 | #if !defined (HAVE_DEV_FD) | |
4841 | /* Open the named pipe in the child. */ | |
ccc6cda3 | 4842 | fd = open (pathname, open_for_read_in_child ? O_RDONLY|O_NONBLOCK : O_WRONLY); |
726f6388 JA |
4843 | if (fd < 0) |
4844 | { | |
b80f6443 JA |
4845 | /* Two separate strings for ease of translation. */ |
4846 | if (open_for_read_in_child) | |
4847 | sys_error (_("cannot open named pipe %s for reading"), pathname); | |
4848 | else | |
4849 | sys_error (_("cannot open named pipe %s for writing"), pathname); | |
4850 | ||
726f6388 JA |
4851 | exit (127); |
4852 | } | |
bb70624e JA |
4853 | if (open_for_read_in_child) |
4854 | { | |
28ef6c31 | 4855 | if (sh_unset_nodelay_mode (fd) < 0) |
bb70624e | 4856 | { |
3185942a | 4857 | sys_error (_("cannot reset nodelay mode for fd %d"), fd); |
bb70624e JA |
4858 | exit (127); |
4859 | } | |
4860 | } | |
726f6388 JA |
4861 | #else /* HAVE_DEV_FD */ |
4862 | fd = child_pipe_fd; | |
4863 | #endif /* HAVE_DEV_FD */ | |
4864 | ||
4865 | if (dup2 (fd, open_for_read_in_child ? 0 : 1) < 0) | |
4866 | { | |
b80f6443 | 4867 | sys_error (_("cannot duplicate named pipe %s as fd %d"), pathname, |
ccc6cda3 | 4868 | open_for_read_in_child ? 0 : 1); |
726f6388 JA |
4869 | exit (127); |
4870 | } | |
4871 | ||
f73dda09 JA |
4872 | if (fd != (open_for_read_in_child ? 0 : 1)) |
4873 | close (fd); | |
726f6388 JA |
4874 | |
4875 | /* Need to close any files that this process has open to pipes inherited | |
4876 | from its parent. */ | |
4877 | if (current_fds_to_close) | |
4878 | { | |
4879 | close_fd_bitmap (current_fds_to_close); | |
4880 | current_fds_to_close = (struct fd_bitmap *)NULL; | |
4881 | } | |
4882 | ||
4883 | #if defined (HAVE_DEV_FD) | |
4884 | /* Make sure we close the parent's end of the pipe and clear the slot | |
4885 | in the fd list so it is not closed later, if reallocated by, for | |
4886 | instance, pipe(2). */ | |
4887 | close (parent_pipe_fd); | |
4888 | dev_fd_list[parent_pipe_fd] = 0; | |
4889 | #endif /* HAVE_DEV_FD */ | |
4890 | ||
d166f048 | 4891 | result = parse_and_execute (string, "process substitution", (SEVAL_NONINT|SEVAL_NOHIST)); |
726f6388 JA |
4892 | |
4893 | #if !defined (HAVE_DEV_FD) | |
4894 | /* Make sure we close the named pipe in the child before we exit. */ | |
4895 | close (open_for_read_in_child ? 0 : 1); | |
4896 | #endif /* !HAVE_DEV_FD */ | |
4897 | ||
4898 | exit (result); | |
4899 | /*NOTREACHED*/ | |
4900 | } | |
4901 | #endif /* PROCESS_SUBSTITUTION */ | |
4902 | ||
cce855bc JA |
4903 | /***********************************/ |
4904 | /* */ | |
4905 | /* Command Substitution */ | |
4906 | /* */ | |
4907 | /***********************************/ | |
4908 | ||
d166f048 | 4909 | static char * |
3185942a | 4910 | read_comsub (fd, quoted, rflag) |
d166f048 | 4911 | int fd, quoted; |
3185942a | 4912 | int *rflag; |
d166f048 | 4913 | { |
3185942a JA |
4914 | char *istring, buf[128], *bufp, *s; |
4915 | int istring_index, istring_size, c, tflag, skip_ctlesc, skip_ctlnul; | |
f73dda09 | 4916 | ssize_t bufn; |
d166f048 JA |
4917 | |
4918 | istring = (char *)NULL; | |
3185942a JA |
4919 | istring_index = istring_size = bufn = tflag = 0; |
4920 | ||
4921 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) | |
4922 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
d166f048 | 4923 | |
28ef6c31 JA |
4924 | #ifdef __CYGWIN__ |
4925 | setmode (fd, O_TEXT); /* we don't want CR/LF, we want Unix-style */ | |
4926 | #endif | |
4927 | ||
3185942a JA |
4928 | /* Read the output of the command through the pipe. This may need to be |
4929 | changed to understand multibyte characters in the future. */ | |
d166f048 JA |
4930 | while (1) |
4931 | { | |
4932 | if (fd < 0) | |
28ef6c31 | 4933 | break; |
d166f048 JA |
4934 | if (--bufn <= 0) |
4935 | { | |
bb70624e | 4936 | bufn = zread (fd, buf, sizeof (buf)); |
d166f048 JA |
4937 | if (bufn <= 0) |
4938 | break; | |
4939 | bufp = buf; | |
4940 | } | |
4941 | c = *bufp++; | |
4942 | ||
28ef6c31 JA |
4943 | if (c == 0) |
4944 | { | |
4945 | #if 0 | |
4946 | internal_warning ("read_comsub: ignored null byte in input"); | |
4947 | #endif | |
4948 | continue; | |
4949 | } | |
4950 | ||
d166f048 JA |
4951 | /* Add the character to ISTRING, possibly after resizing it. */ |
4952 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE); | |
4953 | ||
f1be666c JA |
4954 | /* This is essentially quote_string inline */ |
4955 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */) | |
4956 | istring[istring_index++] = CTLESC; | |
4957 | /* Escape CTLESC and CTLNUL in the output to protect those characters | |
4958 | from the rest of the word expansions (word splitting and globbing.) | |
4959 | This is essentially quote_escapes inline. */ | |
3185942a JA |
4960 | else if (skip_ctlesc == 0 && c == CTLESC) |
4961 | { | |
4962 | tflag |= W_HASCTLESC; | |
4963 | istring[istring_index++] = CTLESC; | |
4964 | } | |
4965 | else if ((skip_ctlnul == 0 && c == CTLNUL) || (c == ' ' && (ifs_value && *ifs_value == 0))) | |
d166f048 JA |
4966 | istring[istring_index++] = CTLESC; |
4967 | ||
4968 | istring[istring_index++] = c; | |
28ef6c31 JA |
4969 | |
4970 | #if 0 | |
4971 | #if defined (__CYGWIN__) | |
4972 | if (c == '\n' && istring_index > 1 && istring[istring_index - 2] == '\r') | |
4973 | { | |
4974 | istring_index--; | |
4975 | istring[istring_index - 1] = '\n'; | |
4976 | } | |
4977 | #endif | |
4978 | #endif | |
d166f048 JA |
4979 | } |
4980 | ||
4981 | if (istring) | |
4982 | istring[istring_index] = '\0'; | |
4983 | ||
4984 | /* If we read no output, just return now and save ourselves some | |
4985 | trouble. */ | |
4986 | if (istring_index == 0) | |
4987 | { | |
4988 | FREE (istring); | |
3185942a JA |
4989 | if (rflag) |
4990 | *rflag = tflag; | |
d166f048 JA |
4991 | return (char *)NULL; |
4992 | } | |
4993 | ||
4994 | /* Strip trailing newlines from the output of the command. */ | |
4995 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
4996 | { | |
4997 | while (istring_index > 0) | |
4998 | { | |
4999 | if (istring[istring_index - 1] == '\n') | |
5000 | { | |
5001 | --istring_index; | |
5002 | ||
5003 | /* If the newline was quoted, remove the quoting char. */ | |
5004 | if (istring[istring_index - 1] == CTLESC) | |
5005 | --istring_index; | |
5006 | } | |
5007 | else | |
5008 | break; | |
5009 | } | |
5010 | istring[istring_index] = '\0'; | |
5011 | } | |
5012 | else | |
5013 | strip_trailing (istring, istring_index - 1, 1); | |
5014 | ||
3185942a JA |
5015 | if (rflag) |
5016 | *rflag = tflag; | |
d166f048 JA |
5017 | return istring; |
5018 | } | |
5019 | ||
3185942a JA |
5020 | /* Perform command substitution on STRING. This returns a WORD_DESC * with the |
5021 | contained string possibly quoted. */ | |
5022 | WORD_DESC * | |
726f6388 JA |
5023 | command_substitute (string, quoted) |
5024 | char *string; | |
5025 | int quoted; | |
5026 | { | |
95732b49 | 5027 | pid_t pid, old_pid, old_pipeline_pgrp, old_async_pid; |
ccc6cda3 | 5028 | char *istring; |
3185942a JA |
5029 | int result, fildes[2], function_value, pflags, rc, tflag; |
5030 | WORD_DESC *ret; | |
726f6388 | 5031 | |
ccc6cda3 | 5032 | istring = (char *)NULL; |
726f6388 JA |
5033 | |
5034 | /* Don't fork () if there is no need to. In the case of no command to | |
5035 | run, just return NULL. */ | |
5036 | if (!string || !*string || (string[0] == '\n' && !string[1])) | |
3185942a | 5037 | return ((WORD_DESC *)NULL); |
726f6388 | 5038 | |
cce855bc JA |
5039 | if (wordexp_only && read_but_dont_execute) |
5040 | { | |
0001803f | 5041 | last_command_exit_value = EX_WEXPCOMSUB; |
cce855bc JA |
5042 | jump_to_top_level (EXITPROG); |
5043 | } | |
5044 | ||
bb70624e JA |
5045 | /* We're making the assumption here that the command substitution will |
5046 | eventually run a command from the file system. Since we'll run | |
5047 | maybe_make_export_env in this subshell before executing that command, | |
5048 | the parent shell and any other shells it starts will have to remake | |
5049 | the environment. If we make it before we fork, other shells won't | |
5050 | have to. Don't bother if we have any temporary variable assignments, | |
5051 | though, because the export environment will be remade after this | |
5052 | command completes anyway, but do it if all the words to be expanded | |
5053 | are variable assignments. */ | |
5054 | if (subst_assign_varlist == 0 || garglist == 0) | |
5055 | maybe_make_export_env (); /* XXX */ | |
5056 | ||
b80f6443 | 5057 | /* Flags to pass to parse_and_execute() */ |
0001803f | 5058 | pflags = (interactive && sourcelevel == 0) ? SEVAL_RESETLINE : 0; |
b80f6443 | 5059 | |
726f6388 JA |
5060 | /* Pipe the output of executing STRING into the current shell. */ |
5061 | if (pipe (fildes) < 0) | |
5062 | { | |
b80f6443 | 5063 | sys_error (_("cannot make pipe for command substitution")); |
726f6388 JA |
5064 | goto error_exit; |
5065 | } | |
5066 | ||
5067 | old_pid = last_made_pid; | |
5068 | #if defined (JOB_CONTROL) | |
ccc6cda3 | 5069 | old_pipeline_pgrp = pipeline_pgrp; |
28ef6c31 JA |
5070 | /* Don't reset the pipeline pgrp if we're already a subshell in a pipeline. */ |
5071 | if ((subshell_environment & SUBSHELL_PIPE) == 0) | |
5072 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 5073 | cleanup_the_pipeline (); |
95732b49 | 5074 | #endif /* JOB_CONTROL */ |
726f6388 | 5075 | |
95732b49 | 5076 | old_async_pid = last_asynchronous_pid; |
95732b49 | 5077 | pid = make_child ((char *)NULL, subshell_environment&SUBSHELL_ASYNC); |
95732b49 JA |
5078 | last_asynchronous_pid = old_async_pid; |
5079 | ||
726f6388 JA |
5080 | if (pid == 0) |
5081 | /* Reset the signal handlers in the child, but don't free the | |
5082 | trap strings. */ | |
5083 | reset_signal_handlers (); | |
ccc6cda3 JA |
5084 | |
5085 | #if defined (JOB_CONTROL) | |
3185942a | 5086 | /* XXX DO THIS ONLY IN PARENT ? XXX */ |
ccc6cda3 JA |
5087 | set_sigchld_handler (); |
5088 | stop_making_children (); | |
f1be666c JA |
5089 | if (pid != 0) |
5090 | pipeline_pgrp = old_pipeline_pgrp; | |
f73dda09 JA |
5091 | #else |
5092 | stop_making_children (); | |
ccc6cda3 | 5093 | #endif /* JOB_CONTROL */ |
726f6388 JA |
5094 | |
5095 | if (pid < 0) | |
5096 | { | |
b80f6443 | 5097 | sys_error (_("cannot make child for command substitution")); |
726f6388 JA |
5098 | error_exit: |
5099 | ||
5100 | FREE (istring); | |
5101 | close (fildes[0]); | |
5102 | close (fildes[1]); | |
3185942a | 5103 | return ((WORD_DESC *)NULL); |
726f6388 JA |
5104 | } |
5105 | ||
5106 | if (pid == 0) | |
5107 | { | |
5108 | set_sigint_handler (); /* XXX */ | |
28ef6c31 | 5109 | |
b80f6443 JA |
5110 | free_pushed_string_input (); |
5111 | ||
726f6388 JA |
5112 | if (dup2 (fildes[1], 1) < 0) |
5113 | { | |
b80f6443 | 5114 | sys_error (_("command_substitute: cannot duplicate pipe as fd 1")); |
726f6388 JA |
5115 | exit (EXECUTION_FAILURE); |
5116 | } | |
5117 | ||
5118 | /* If standard output is closed in the parent shell | |
5119 | (such as after `exec >&-'), file descriptor 1 will be | |
5120 | the lowest available file descriptor, and end up in | |
5121 | fildes[0]. This can happen for stdin and stderr as well, | |
5122 | but stdout is more important -- it will cause no output | |
5123 | to be generated from this command. */ | |
5124 | if ((fildes[1] != fileno (stdin)) && | |
5125 | (fildes[1] != fileno (stdout)) && | |
5126 | (fildes[1] != fileno (stderr))) | |
5127 | close (fildes[1]); | |
5128 | ||
5129 | if ((fildes[0] != fileno (stdin)) && | |
5130 | (fildes[0] != fileno (stdout)) && | |
5131 | (fildes[0] != fileno (stderr))) | |
5132 | close (fildes[0]); | |
5133 | ||
5134 | /* The currently executing shell is not interactive. */ | |
5135 | interactive = 0; | |
5136 | ||
ccc6cda3 | 5137 | /* This is a subshell environment. */ |
28ef6c31 | 5138 | subshell_environment |= SUBSHELL_COMSUB; |
ccc6cda3 | 5139 | |
28ef6c31 | 5140 | /* When not in POSIX mode, command substitution does not inherit |
7117c2d2 | 5141 | the -e flag. */ |
28ef6c31 JA |
5142 | if (posixly_correct == 0) |
5143 | exit_immediately_on_error = 0; | |
726f6388 JA |
5144 | |
5145 | remove_quoted_escapes (string); | |
5146 | ||
ccc6cda3 | 5147 | startup_state = 2; /* see if we can avoid a fork */ |
726f6388 JA |
5148 | /* Give command substitution a place to jump back to on failure, |
5149 | so we don't go back up to main (). */ | |
5150 | result = setjmp (top_level); | |
5151 | ||
bb70624e JA |
5152 | /* If we're running a command substitution inside a shell function, |
5153 | trap `return' so we don't return from the function in the subshell | |
5154 | and go off to never-never land. */ | |
5155 | if (result == 0 && return_catch_flag) | |
5156 | function_value = setjmp (return_catch); | |
5157 | else | |
5158 | function_value = 0; | |
5159 | ||
b80f6443 JA |
5160 | if (result == ERREXIT) |
5161 | rc = last_command_exit_value; | |
5162 | else if (result == EXITPROG) | |
5163 | rc = last_command_exit_value; | |
726f6388 | 5164 | else if (result) |
b80f6443 | 5165 | rc = EXECUTION_FAILURE; |
bb70624e | 5166 | else if (function_value) |
b80f6443 | 5167 | rc = return_catch_value; |
726f6388 | 5168 | else |
b80f6443 JA |
5169 | { |
5170 | subshell_level++; | |
5171 | rc = parse_and_execute (string, "command substitution", pflags|SEVAL_NOHIST); | |
5172 | subshell_level--; | |
5173 | } | |
5174 | ||
5175 | last_command_exit_value = rc; | |
5176 | rc = run_exit_trap (); | |
f1be666c JA |
5177 | #if defined (PROCESS_SUBSTITUTION) |
5178 | unlink_fifo_list (); | |
5179 | #endif | |
b80f6443 | 5180 | exit (rc); |
726f6388 JA |
5181 | } |
5182 | else | |
5183 | { | |
726f6388 JA |
5184 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) |
5185 | close_pgrp_pipe (); | |
5186 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
5187 | ||
5188 | close (fildes[1]); | |
5189 | ||
3185942a JA |
5190 | tflag = 0; |
5191 | istring = read_comsub (fildes[0], quoted, &tflag); | |
ccc6cda3 | 5192 | |
726f6388 JA |
5193 | close (fildes[0]); |
5194 | ||
b72432fd | 5195 | current_command_subst_pid = pid; |
726f6388 JA |
5196 | last_command_exit_value = wait_for (pid); |
5197 | last_command_subst_pid = pid; | |
5198 | last_made_pid = old_pid; | |
5199 | ||
5200 | #if defined (JOB_CONTROL) | |
5201 | /* If last_command_exit_value > 128, then the substituted command | |
5202 | was terminated by a signal. If that signal was SIGINT, then send | |
5203 | SIGINT to ourselves. This will break out of loops, for instance. */ | |
b80f6443 | 5204 | if (last_command_exit_value == (128 + SIGINT) && last_command_exit_signal == SIGINT) |
726f6388 JA |
5205 | kill (getpid (), SIGINT); |
5206 | ||
5207 | /* wait_for gives the terminal back to shell_pgrp. If some other | |
cce855bc JA |
5208 | process group should have it, give it away to that group here. |
5209 | pipeline_pgrp is non-zero only while we are constructing a | |
5210 | pipline, so what we are concerned about is whether or not that | |
5211 | pipeline was started in the background. A pipeline started in | |
5212 | the background should never get the tty back here. */ | |
5213 | #if 0 | |
5214 | if (interactive && pipeline_pgrp != (pid_t)0 && pipeline_pgrp != last_asynchronous_pid) | |
5215 | #else | |
28ef6c31 | 5216 | if (interactive && pipeline_pgrp != (pid_t)0 && (subshell_environment & SUBSHELL_ASYNC) == 0) |
cce855bc | 5217 | #endif |
28ef6c31 | 5218 | give_terminal_to (pipeline_pgrp, 0); |
726f6388 JA |
5219 | #endif /* JOB_CONTROL */ |
5220 | ||
3185942a JA |
5221 | ret = alloc_word_desc (); |
5222 | ret->word = istring; | |
5223 | ret->flags = tflag; | |
5224 | ||
5225 | return ret; | |
726f6388 JA |
5226 | } |
5227 | } | |
5228 | ||
5229 | /******************************************************** | |
5230 | * * | |
5231 | * Utility functions for parameter expansion * | |
5232 | * * | |
5233 | ********************************************************/ | |
5234 | ||
ccc6cda3 | 5235 | #if defined (ARRAY_VARS) |
ccc6cda3 | 5236 | |
f73dda09 | 5237 | static arrayind_t |
ccc6cda3 JA |
5238 | array_length_reference (s) |
5239 | char *s; | |
5240 | { | |
f73dda09 JA |
5241 | int len; |
5242 | arrayind_t ind; | |
3185942a | 5243 | char *akey; |
f73dda09 | 5244 | char *t, c; |
ccc6cda3 JA |
5245 | ARRAY *array; |
5246 | SHELL_VAR *var; | |
5247 | ||
5248 | var = array_variable_part (s, &t, &len); | |
726f6388 | 5249 | |
ccc6cda3 JA |
5250 | /* If unbound variables should generate an error, report one and return |
5251 | failure. */ | |
3185942a | 5252 | if ((var == 0 || (assoc_p (var) == 0 && array_p (var) == 0)) && unbound_vars_is_error) |
726f6388 | 5253 | { |
f73dda09 | 5254 | c = *--t; |
ccc6cda3 | 5255 | *t = '\0'; |
0001803f | 5256 | last_command_exit_value = EXECUTION_FAILURE; |
7117c2d2 | 5257 | err_unboundvar (s); |
f73dda09 | 5258 | *t = c; |
ccc6cda3 | 5259 | return (-1); |
726f6388 | 5260 | } |
ccc6cda3 JA |
5261 | else if (var == 0) |
5262 | return 0; | |
726f6388 | 5263 | |
28ef6c31 JA |
5264 | /* We support a couple of expansions for variables that are not arrays. |
5265 | We'll return the length of the value for v[0], and 1 for v[@] or | |
5266 | v[*]. Return 0 for everything else. */ | |
5267 | ||
5268 | array = array_p (var) ? array_cell (var) : (ARRAY *)NULL; | |
726f6388 | 5269 | |
ccc6cda3 | 5270 | if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']') |
ccc6cda3 | 5271 | { |
3185942a JA |
5272 | if (assoc_p (var)) |
5273 | return (assoc_num_elements (assoc_cell (var))); | |
5274 | else if (array_p (var)) | |
5275 | return (array_num_elements (array)); | |
5276 | else | |
5277 | return 1; | |
ccc6cda3 | 5278 | } |
ccc6cda3 | 5279 | |
3185942a JA |
5280 | if (assoc_p (var)) |
5281 | { | |
5282 | t[len - 1] = '\0'; | |
5283 | akey = expand_assignment_string_to_string (t, 0); /* [ */ | |
5284 | t[len - 1] = ']'; | |
5285 | if (akey == 0 || *akey == 0) | |
5286 | { | |
5287 | err_badarraysub (t); | |
5288 | return (-1); | |
5289 | } | |
5290 | t = assoc_reference (assoc_cell (var), akey); | |
5291 | } | |
28ef6c31 | 5292 | else |
3185942a JA |
5293 | { |
5294 | ind = array_expand_index (t, len); | |
5295 | if (ind < 0) | |
5296 | { | |
5297 | err_badarraysub (t); | |
5298 | return (-1); | |
5299 | } | |
5300 | if (array_p (var)) | |
5301 | t = array_reference (array, ind); | |
5302 | else | |
5303 | t = (ind == 0) ? value_cell (var) : (char *)NULL; | |
5304 | } | |
28ef6c31 | 5305 | |
f1be666c | 5306 | len = MB_STRLEN (t); |
ccc6cda3 | 5307 | return (len); |
726f6388 | 5308 | } |
ccc6cda3 | 5309 | #endif /* ARRAY_VARS */ |
726f6388 JA |
5310 | |
5311 | static int | |
5312 | valid_brace_expansion_word (name, var_is_special) | |
5313 | char *name; | |
5314 | int var_is_special; | |
5315 | { | |
f73dda09 | 5316 | if (DIGIT (*name) && all_digits (name)) |
726f6388 JA |
5317 | return 1; |
5318 | else if (var_is_special) | |
5319 | return 1; | |
ccc6cda3 JA |
5320 | #if defined (ARRAY_VARS) |
5321 | else if (valid_array_reference (name)) | |
5322 | return 1; | |
5323 | #endif /* ARRAY_VARS */ | |
726f6388 JA |
5324 | else if (legal_identifier (name)) |
5325 | return 1; | |
5326 | else | |
5327 | return 0; | |
5328 | } | |
ccc6cda3 | 5329 | |
b80f6443 JA |
5330 | static int |
5331 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at) | |
5332 | char *name; | |
5333 | int quoted; | |
5334 | int *quoted_dollar_atp, *contains_dollar_at; | |
5335 | { | |
5336 | char *temp1; | |
5337 | ||
5338 | if (name == 0) | |
5339 | { | |
5340 | if (quoted_dollar_atp) | |
5341 | *quoted_dollar_atp = 0; | |
5342 | if (contains_dollar_at) | |
5343 | *contains_dollar_at = 0; | |
5344 | return 0; | |
5345 | } | |
5346 | ||
5347 | /* check for $@ and $* */ | |
5348 | if (name[0] == '@' && name[1] == 0) | |
5349 | { | |
5350 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5351 | *quoted_dollar_atp = 1; | |
5352 | if (contains_dollar_at) | |
5353 | *contains_dollar_at = 1; | |
5354 | return 1; | |
5355 | } | |
5356 | else if (name[0] == '*' && name[1] == '\0' && quoted == 0) | |
5357 | { | |
5358 | if (contains_dollar_at) | |
5359 | *contains_dollar_at = 1; | |
5360 | return 1; | |
5361 | } | |
5362 | ||
5363 | /* Now check for ${array[@]} and ${array[*]} */ | |
5364 | #if defined (ARRAY_VARS) | |
5365 | else if (valid_array_reference (name)) | |
5366 | { | |
0001803f | 5367 | temp1 = mbschr (name, '['); |
b80f6443 JA |
5368 | if (temp1 && temp1[1] == '@' && temp1[2] == ']') |
5369 | { | |
5370 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5371 | *quoted_dollar_atp = 1; | |
5372 | if (contains_dollar_at) | |
5373 | *contains_dollar_at = 1; | |
5374 | return 1; | |
5375 | } /* [ */ | |
5376 | /* ${array[*]}, when unquoted, should be treated like ${array[@]}, | |
5377 | which should result in separate words even when IFS is unset. */ | |
5378 | if (temp1 && temp1[1] == '*' && temp1[2] == ']' && quoted == 0) | |
5379 | { | |
5380 | if (contains_dollar_at) | |
5381 | *contains_dollar_at = 1; | |
5382 | return 1; | |
5383 | } | |
5384 | } | |
5385 | #endif | |
5386 | return 0; | |
5387 | } | |
5388 | ||
726f6388 JA |
5389 | /* Parameter expand NAME, and return a new string which is the expansion, |
5390 | or NULL if there was no expansion. | |
5391 | VAR_IS_SPECIAL is non-zero if NAME is one of the special variables in | |
5392 | the shell, e.g., "@", "$", "*", etc. QUOTED, if non-zero, means that | |
5393 | NAME was found inside of a double-quoted expression. */ | |
95732b49 | 5394 | static WORD_DESC * |
89a92869 | 5395 | parameter_brace_expand_word (name, var_is_special, quoted, pflags) |
726f6388 | 5396 | char *name; |
89a92869 | 5397 | int var_is_special, quoted, pflags; |
726f6388 | 5398 | { |
95732b49 | 5399 | WORD_DESC *ret; |
ccc6cda3 | 5400 | char *temp, *tt; |
7117c2d2 | 5401 | intmax_t arg_index; |
ccc6cda3 | 5402 | SHELL_VAR *var; |
f1be666c | 5403 | int atype, rflags; |
726f6388 | 5404 | |
95732b49 JA |
5405 | ret = 0; |
5406 | temp = 0; | |
f1be666c | 5407 | rflags = 0; |
95732b49 JA |
5408 | |
5409 | /* Handle multiple digit arguments, as in ${11}. */ | |
f73dda09 | 5410 | if (legal_number (name, &arg_index)) |
7117c2d2 JA |
5411 | { |
5412 | tt = get_dollar_var_value (arg_index); | |
b80f6443 JA |
5413 | if (tt) |
5414 | temp = (*tt && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
5415 | ? quote_string (tt) | |
5416 | : quote_escapes (tt); | |
5417 | else | |
5418 | temp = (char *)NULL; | |
7117c2d2 JA |
5419 | FREE (tt); |
5420 | } | |
726f6388 JA |
5421 | else if (var_is_special) /* ${@} */ |
5422 | { | |
cce855bc | 5423 | int sindex; |
f73dda09 | 5424 | tt = (char *)xmalloc (2 + strlen (name)); |
cce855bc | 5425 | tt[sindex = 0] = '$'; |
726f6388 | 5426 | strcpy (tt + 1, name); |
7117c2d2 | 5427 | |
95732b49 | 5428 | ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL, |
89a92869 | 5429 | (int *)NULL, (int *)NULL, pflags); |
cce855bc | 5430 | free (tt); |
726f6388 | 5431 | } |
ccc6cda3 JA |
5432 | #if defined (ARRAY_VARS) |
5433 | else if (valid_array_reference (name)) | |
5434 | { | |
7117c2d2 JA |
5435 | temp = array_value (name, quoted, &atype); |
5436 | if (atype == 0 && temp) | |
b80f6443 JA |
5437 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5438 | ? quote_string (temp) | |
5439 | : quote_escapes (temp); | |
f1be666c JA |
5440 | else if (atype == 1 && temp && QUOTED_NULL (temp) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5441 | rflags |= W_HASQUOTEDNULL; | |
ccc6cda3 JA |
5442 | } |
5443 | #endif | |
5444 | else if (var = find_variable (name)) | |
5445 | { | |
7117c2d2 | 5446 | if (var_isset (var) && invisible_p (var) == 0) |
28ef6c31 | 5447 | { |
ccc6cda3 | 5448 | #if defined (ARRAY_VARS) |
3185942a JA |
5449 | if (assoc_p (var)) |
5450 | temp = assoc_reference (assoc_cell (var), "0"); | |
5451 | else if (array_p (var)) | |
5452 | temp = array_reference (array_cell (var), 0); | |
5453 | else | |
5454 | temp = value_cell (var); | |
ccc6cda3 JA |
5455 | #else |
5456 | temp = value_cell (var); | |
5457 | #endif | |
5458 | ||
5459 | if (temp) | |
b80f6443 JA |
5460 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5461 | ? quote_string (temp) | |
5462 | : quote_escapes (temp); | |
28ef6c31 | 5463 | } |
ccc6cda3 JA |
5464 | else |
5465 | temp = (char *)NULL; | |
5466 | } | |
726f6388 | 5467 | else |
ccc6cda3 | 5468 | temp = (char *)NULL; |
726f6388 | 5469 | |
95732b49 JA |
5470 | if (ret == 0) |
5471 | { | |
5472 | ret = alloc_word_desc (); | |
5473 | ret->word = temp; | |
f1be666c | 5474 | ret->flags |= rflags; |
95732b49 JA |
5475 | } |
5476 | return ret; | |
726f6388 JA |
5477 | } |
5478 | ||
ccc6cda3 JA |
5479 | /* Expand an indirect reference to a variable: ${!NAME} expands to the |
5480 | value of the variable whose name is the value of NAME. */ | |
95732b49 | 5481 | static WORD_DESC * |
b80f6443 | 5482 | parameter_brace_expand_indir (name, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at) |
ccc6cda3 JA |
5483 | char *name; |
5484 | int var_is_special, quoted; | |
b80f6443 | 5485 | int *quoted_dollar_atp, *contains_dollar_at; |
ccc6cda3 JA |
5486 | { |
5487 | char *temp, *t; | |
95732b49 | 5488 | WORD_DESC *w; |
ccc6cda3 | 5489 | |
89a92869 | 5490 | w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND); |
95732b49 | 5491 | t = w->word; |
b80f6443 JA |
5492 | /* Have to dequote here if necessary */ |
5493 | if (t) | |
5494 | { | |
5495 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
5496 | ? dequote_string (t) | |
5497 | : dequote_escapes (t); | |
5498 | free (t); | |
5499 | t = temp; | |
5500 | } | |
95732b49 JA |
5501 | dispose_word_desc (w); |
5502 | ||
b80f6443 | 5503 | chk_atstar (t, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 | 5504 | if (t == 0) |
95732b49 JA |
5505 | return (WORD_DESC *)NULL; |
5506 | ||
89a92869 | 5507 | w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0); |
ccc6cda3 | 5508 | free (t); |
95732b49 JA |
5509 | |
5510 | return w; | |
ccc6cda3 JA |
5511 | } |
5512 | ||
726f6388 JA |
5513 | /* Expand the right side of a parameter expansion of the form ${NAMEcVALUE}, |
5514 | depending on the value of C, the separating character. C can be one of | |
ccc6cda3 JA |
5515 | "-", "+", or "=". QUOTED is true if the entire brace expression occurs |
5516 | between double quotes. */ | |
95732b49 | 5517 | static WORD_DESC * |
ccc6cda3 | 5518 | parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat) |
726f6388 | 5519 | char *name, *value; |
ccc6cda3 | 5520 | int c, quoted, *qdollaratp, *hasdollarat; |
726f6388 | 5521 | { |
95732b49 | 5522 | WORD_DESC *w; |
726f6388 JA |
5523 | WORD_LIST *l; |
5524 | char *t, *t1, *temp; | |
ccc6cda3 | 5525 | int hasdol; |
726f6388 | 5526 | |
ccc6cda3 JA |
5527 | /* If the entire expression is between double quotes, we want to treat |
5528 | the value as a double-quoted string, with the exception that we strip | |
3185942a | 5529 | embedded unescaped double quotes (for sh backwards compatibility). */ |
95732b49 | 5530 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *value) |
726f6388 | 5531 | { |
ccc6cda3 | 5532 | hasdol = 0; |
95732b49 | 5533 | temp = string_extract_double_quoted (value, &hasdol, 1); |
726f6388 | 5534 | } |
95732b49 JA |
5535 | else |
5536 | temp = value; | |
ccc6cda3 | 5537 | |
95732b49 | 5538 | w = alloc_word_desc (); |
726f6388 | 5539 | hasdol = 0; |
ccc6cda3 JA |
5540 | /* XXX was 0 not quoted */ |
5541 | l = *temp ? expand_string_for_rhs (temp, quoted, &hasdol, (int *)NULL) | |
5542 | : (WORD_LIST *)0; | |
5543 | if (hasdollarat) | |
5544 | *hasdollarat = hasdol || (l && l->next); | |
95732b49 JA |
5545 | if (temp != value) |
5546 | free (temp); | |
726f6388 JA |
5547 | if (l) |
5548 | { | |
ccc6cda3 | 5549 | /* The expansion of TEMP returned something. We need to treat things |
b80f6443 JA |
5550 | slightly differently if HASDOL is non-zero. If we have "$@", the |
5551 | individual words have already been quoted. We need to turn them | |
5552 | into a string with the words separated by the first character of | |
5553 | $IFS without any additional quoting, so string_list_dollar_at won't | |
5554 | do the right thing. We use string_list_dollar_star instead. */ | |
5555 | temp = (hasdol || l->next) ? string_list_dollar_star (l) : string_list (l); | |
5556 | ||
ccc6cda3 JA |
5557 | /* If l->next is not null, we know that TEMP contained "$@", since that |
5558 | is the only expansion that creates more than one word. */ | |
b80f6443 | 5559 | if (qdollaratp && ((hasdol && quoted) || l->next)) |
ccc6cda3 | 5560 | *qdollaratp = 1; |
726f6388 JA |
5561 | dispose_words (l); |
5562 | } | |
ccc6cda3 | 5563 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol) |
726f6388 | 5564 | { |
ccc6cda3 JA |
5565 | /* The brace expansion occurred between double quotes and there was |
5566 | a $@ in TEMP. It does not matter if the $@ is quoted, as long as | |
7117c2d2 JA |
5567 | it does not expand to anything. In this case, we want to return |
5568 | a quoted empty string. */ | |
0628567a | 5569 | temp = make_quoted_char ('\0'); |
95732b49 | 5570 | w->flags |= W_HASQUOTEDNULL; |
726f6388 JA |
5571 | } |
5572 | else | |
5573 | temp = (char *)NULL; | |
5574 | ||
5575 | if (c == '-' || c == '+') | |
95732b49 JA |
5576 | { |
5577 | w->word = temp; | |
5578 | return w; | |
5579 | } | |
726f6388 JA |
5580 | |
5581 | /* c == '=' */ | |
ccc6cda3 | 5582 | t = temp ? savestring (temp) : savestring (""); |
726f6388 JA |
5583 | t1 = dequote_string (t); |
5584 | free (t); | |
b80f6443 JA |
5585 | #if defined (ARRAY_VARS) |
5586 | if (valid_array_reference (name)) | |
95732b49 | 5587 | assign_array_element (name, t1, 0); |
b80f6443 JA |
5588 | else |
5589 | #endif /* ARRAY_VARS */ | |
95732b49 | 5590 | bind_variable (name, t1, 0); |
726f6388 | 5591 | free (t1); |
95732b49 JA |
5592 | |
5593 | w->word = temp; | |
5594 | return w; | |
726f6388 JA |
5595 | } |
5596 | ||
5597 | /* Deal with the right hand side of a ${name:?value} expansion in the case | |
5598 | that NAME is null or not set. If VALUE is non-null it is expanded and | |
5599 | used as the error message to print, otherwise a standard message is | |
5600 | printed. */ | |
5601 | static void | |
5602 | parameter_brace_expand_error (name, value) | |
5603 | char *name, *value; | |
5604 | { | |
ccc6cda3 JA |
5605 | WORD_LIST *l; |
5606 | char *temp; | |
5607 | ||
726f6388 JA |
5608 | if (value && *value) |
5609 | { | |
95732b49 | 5610 | l = expand_string (value, 0); |
ccc6cda3 JA |
5611 | temp = string_list (l); |
5612 | report_error ("%s: %s", name, temp ? temp : ""); /* XXX was value not "" */ | |
5613 | FREE (temp); | |
726f6388 JA |
5614 | dispose_words (l); |
5615 | } | |
5616 | else | |
b80f6443 | 5617 | report_error (_("%s: parameter null or not set"), name); |
726f6388 JA |
5618 | |
5619 | /* Free the data we have allocated during this expansion, since we | |
5620 | are about to longjmp out. */ | |
5621 | free (name); | |
5622 | FREE (value); | |
5623 | } | |
5624 | ||
5625 | /* Return 1 if NAME is something for which parameter_brace_expand_length is | |
5626 | OK to do. */ | |
5627 | static int | |
5628 | valid_length_expression (name) | |
5629 | char *name; | |
5630 | { | |
28ef6c31 | 5631 | return (name[1] == '\0' || /* ${#} */ |
f73dda09 JA |
5632 | ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') || /* special param */ |
5633 | (DIGIT (name[1]) && all_digits (name + 1)) || /* ${#11} */ | |
ccc6cda3 JA |
5634 | #if defined (ARRAY_VARS) |
5635 | valid_array_reference (name + 1) || /* ${#a[7]} */ | |
5636 | #endif | |
726f6388 JA |
5637 | legal_identifier (name + 1)); /* ${#PS1} */ |
5638 | } | |
5639 | ||
eb873671 JA |
5640 | #if defined (HANDLE_MULTIBYTE) |
5641 | size_t | |
5642 | mbstrlen (s) | |
5643 | const char *s; | |
5644 | { | |
5645 | size_t clen, nc; | |
95732b49 | 5646 | mbstate_t mbs, mbsbak; |
eb873671 JA |
5647 | |
5648 | nc = 0; | |
5649 | memset (&mbs, 0, sizeof (mbs)); | |
95732b49 JA |
5650 | mbsbak = mbs; |
5651 | while ((clen = mbrlen(s, MB_CUR_MAX, &mbs)) != 0) | |
eb873671 | 5652 | { |
95732b49 JA |
5653 | if (MB_INVALIDCH(clen)) |
5654 | { | |
5655 | clen = 1; /* assume single byte */ | |
5656 | mbs = mbsbak; | |
5657 | } | |
5658 | ||
eb873671 JA |
5659 | s += clen; |
5660 | nc++; | |
95732b49 | 5661 | mbsbak = mbs; |
eb873671 JA |
5662 | } |
5663 | return nc; | |
5664 | } | |
5665 | #endif | |
5666 | ||
5667 | ||
726f6388 JA |
5668 | /* Handle the parameter brace expansion that requires us to return the |
5669 | length of a parameter. */ | |
7117c2d2 | 5670 | static intmax_t |
726f6388 JA |
5671 | parameter_brace_expand_length (name) |
5672 | char *name; | |
5673 | { | |
ccc6cda3 | 5674 | char *t, *newname; |
7117c2d2 | 5675 | intmax_t number, arg_index; |
ccc6cda3 JA |
5676 | WORD_LIST *list; |
5677 | #if defined (ARRAY_VARS) | |
5678 | SHELL_VAR *var; | |
5679 | #endif | |
5680 | ||
5681 | if (name[1] == '\0') /* ${#} */ | |
5682 | number = number_of_args (); | |
cce855bc JA |
5683 | else if ((name[1] == '@' || name[1] == '*') && name[2] == '\0') /* ${#@}, ${#*} */ |
5684 | number = number_of_args (); | |
f73dda09 | 5685 | else if ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') |
cce855bc JA |
5686 | { |
5687 | /* Take the lengths of some of the shell's special parameters. */ | |
5688 | switch (name[1]) | |
5689 | { | |
5690 | case '-': | |
5691 | t = which_set_flags (); | |
5692 | break; | |
5693 | case '?': | |
5694 | t = itos (last_command_exit_value); | |
5695 | break; | |
5696 | case '$': | |
5697 | t = itos (dollar_dollar_pid); | |
5698 | break; | |
5699 | case '!': | |
5700 | if (last_asynchronous_pid == NO_PID) | |
5701 | t = (char *)NULL; | |
5702 | else | |
f73dda09 | 5703 | t = itos (last_asynchronous_pid); |
cce855bc JA |
5704 | break; |
5705 | case '#': | |
5706 | t = itos (number_of_args ()); | |
5707 | break; | |
5708 | } | |
5709 | number = STRLEN (t); | |
5710 | FREE (t); | |
5711 | } | |
ccc6cda3 JA |
5712 | #if defined (ARRAY_VARS) |
5713 | else if (valid_array_reference (name + 1)) | |
5714 | number = array_length_reference (name + 1); | |
5715 | #endif /* ARRAY_VARS */ | |
cce855bc | 5716 | else |
ccc6cda3 JA |
5717 | { |
5718 | number = 0; | |
5719 | ||
f73dda09 | 5720 | if (legal_number (name + 1, &arg_index)) /* ${#1} */ |
ccc6cda3 | 5721 | { |
f73dda09 | 5722 | t = get_dollar_var_value (arg_index); |
eb873671 | 5723 | number = MB_STRLEN (t); |
ccc6cda3 JA |
5724 | FREE (t); |
5725 | } | |
5726 | #if defined (ARRAY_VARS) | |
3185942a | 5727 | else if ((var = find_variable (name + 1)) && (invisible_p (var) == 0) && (array_p (var) || assoc_p (var))) |
ccc6cda3 | 5728 | { |
3185942a JA |
5729 | if (assoc_p (var)) |
5730 | t = assoc_reference (assoc_cell (var), "0"); | |
5731 | else | |
5732 | t = array_reference (array_cell (var), 0); | |
eb873671 | 5733 | number = MB_STRLEN (t); |
ccc6cda3 JA |
5734 | } |
5735 | #endif | |
5736 | else /* ${#PS1} */ | |
5737 | { | |
5738 | newname = savestring (name); | |
5739 | newname[0] = '$'; | |
5740 | list = expand_string (newname, Q_DOUBLE_QUOTES); | |
5741 | t = list ? string_list (list) : (char *)NULL; | |
5742 | free (newname); | |
5743 | if (list) | |
5744 | dispose_words (list); | |
5745 | ||
eb873671 | 5746 | number = MB_STRLEN (t); |
ccc6cda3 JA |
5747 | FREE (t); |
5748 | } | |
5749 | } | |
ccc6cda3 JA |
5750 | |
5751 | return (number); | |
5752 | } | |
5753 | ||
28ef6c31 JA |
5754 | /* Skip characters in SUBSTR until DELIM. SUBSTR is an arithmetic expression, |
5755 | so we do some ad-hoc parsing of an arithmetic expression to find | |
5756 | the first DELIM, instead of using strchr(3). Two rules: | |
5757 | 1. If the substring contains a `(', read until closing `)'. | |
5758 | 2. If the substring contains a `?', read past one `:' for each `?'. | |
5759 | */ | |
5760 | ||
5761 | static char * | |
5762 | skiparith (substr, delim) | |
5763 | char *substr; | |
5764 | int delim; | |
5765 | { | |
7117c2d2 JA |
5766 | size_t sublen; |
5767 | int skipcol, pcount, i; | |
5768 | DECLARE_MBSTATE; | |
28ef6c31 | 5769 | |
7117c2d2 JA |
5770 | sublen = strlen (substr); |
5771 | i = skipcol = pcount = 0; | |
5772 | while (substr[i]) | |
28ef6c31 JA |
5773 | { |
5774 | /* Balance parens */ | |
7117c2d2 | 5775 | if (substr[i] == LPAREN) |
28ef6c31 JA |
5776 | { |
5777 | pcount++; | |
7117c2d2 | 5778 | i++; |
28ef6c31 JA |
5779 | continue; |
5780 | } | |
7117c2d2 | 5781 | if (substr[i] == RPAREN && pcount) |
28ef6c31 JA |
5782 | { |
5783 | pcount--; | |
7117c2d2 | 5784 | i++; |
28ef6c31 JA |
5785 | continue; |
5786 | } | |
5787 | if (pcount) | |
7117c2d2 JA |
5788 | { |
5789 | ADVANCE_CHAR (substr, sublen, i); | |
5790 | continue; | |
5791 | } | |
28ef6c31 JA |
5792 | |
5793 | /* Skip one `:' for each `?' */ | |
7117c2d2 | 5794 | if (substr[i] == ':' && skipcol) |
28ef6c31 JA |
5795 | { |
5796 | skipcol--; | |
7117c2d2 | 5797 | i++; |
28ef6c31 JA |
5798 | continue; |
5799 | } | |
7117c2d2 | 5800 | if (substr[i] == delim) |
28ef6c31 | 5801 | break; |
7117c2d2 | 5802 | if (substr[i] == '?') |
28ef6c31 JA |
5803 | { |
5804 | skipcol++; | |
7117c2d2 | 5805 | i++; |
28ef6c31 JA |
5806 | continue; |
5807 | } | |
7117c2d2 | 5808 | ADVANCE_CHAR (substr, sublen, i); |
28ef6c31 | 5809 | } |
7117c2d2 JA |
5810 | |
5811 | return (substr + i); | |
28ef6c31 JA |
5812 | } |
5813 | ||
ccc6cda3 JA |
5814 | /* Verify and limit the start and end of the desired substring. If |
5815 | VTYPE == 0, a regular shell variable is being used; if it is 1, | |
cce855bc | 5816 | then the positional parameters are being used; if it is 2, then |
e8ce775d JA |
5817 | VALUE is really a pointer to an array variable that should be used. |
5818 | Return value is 1 if both values were OK, 0 if there was a problem | |
5819 | with an invalid expression, or -1 if the values were out of range. */ | |
ccc6cda3 | 5820 | static int |
3185942a JA |
5821 | verify_substring_values (v, value, substr, vtype, e1p, e2p) |
5822 | SHELL_VAR *v; | |
ccc6cda3 | 5823 | char *value, *substr; |
f73dda09 | 5824 | int vtype; |
7117c2d2 | 5825 | intmax_t *e1p, *e2p; |
ccc6cda3 | 5826 | { |
bb70624e | 5827 | char *t, *temp1, *temp2; |
f73dda09 JA |
5828 | arrayind_t len; |
5829 | int expok; | |
ccc6cda3 JA |
5830 | #if defined (ARRAY_VARS) |
5831 | ARRAY *a; | |
3185942a | 5832 | HASH_TABLE *h; |
ccc6cda3 JA |
5833 | #endif |
5834 | ||
28ef6c31 JA |
5835 | /* duplicate behavior of strchr(3) */ |
5836 | t = skiparith (substr, ':'); | |
5837 | if (*t && *t == ':') | |
7117c2d2 | 5838 | *t = '\0'; |
28ef6c31 JA |
5839 | else |
5840 | t = (char *)0; | |
f73dda09 | 5841 | |
0628567a | 5842 | temp1 = expand_arith_string (substr, Q_DOUBLE_QUOTES); |
d166f048 | 5843 | *e1p = evalexp (temp1, &expok); |
ccc6cda3 | 5844 | free (temp1); |
d166f048 JA |
5845 | if (expok == 0) |
5846 | return (0); | |
ccc6cda3 | 5847 | |
f73dda09 | 5848 | len = -1; /* paranoia */ |
ccc6cda3 JA |
5849 | switch (vtype) |
5850 | { | |
5851 | case VT_VARIABLE: | |
d166f048 | 5852 | case VT_ARRAYMEMBER: |
eb873671 | 5853 | len = MB_STRLEN (value); |
ccc6cda3 JA |
5854 | break; |
5855 | case VT_POSPARMS: | |
5856 | len = number_of_args () + 1; | |
3185942a JA |
5857 | if (*e1p == 0) |
5858 | len++; /* add one arg if counting from $0 */ | |
ccc6cda3 JA |
5859 | break; |
5860 | #if defined (ARRAY_VARS) | |
5861 | case VT_ARRAYVAR: | |
eb873671 | 5862 | /* For arrays, the first value deals with array indices. Negative |
3185942a JA |
5863 | offsets count from one past the array's maximum index. Associative |
5864 | arrays treat the number of elements as the maximum index. */ | |
5865 | if (assoc_p (v)) | |
5866 | { | |
5867 | h = assoc_cell (v); | |
5868 | len = assoc_num_elements (h) + (*e1p < 0); | |
5869 | } | |
5870 | else | |
5871 | { | |
5872 | a = (ARRAY *)value; | |
5873 | len = array_max_index (a) + (*e1p < 0); /* arrays index from 0 to n - 1 */ | |
5874 | } | |
ccc6cda3 JA |
5875 | break; |
5876 | #endif | |
5877 | } | |
5878 | ||
f73dda09 JA |
5879 | if (len == -1) /* paranoia */ |
5880 | return -1; | |
5881 | ||
ccc6cda3 JA |
5882 | if (*e1p < 0) /* negative offsets count from end */ |
5883 | *e1p += len; | |
5884 | ||
eb873671 | 5885 | if (*e1p > len || *e1p < 0) |
e8ce775d | 5886 | return (-1); |
d166f048 | 5887 | |
b80f6443 JA |
5888 | #if defined (ARRAY_VARS) |
5889 | /* For arrays, the second offset deals with the number of elements. */ | |
5890 | if (vtype == VT_ARRAYVAR) | |
3185942a | 5891 | len = assoc_p (v) ? assoc_num_elements (h) : array_num_elements (a); |
b80f6443 JA |
5892 | #endif |
5893 | ||
ccc6cda3 JA |
5894 | if (t) |
5895 | { | |
5896 | t++; | |
bb70624e | 5897 | temp2 = savestring (t); |
0628567a | 5898 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
bb70624e | 5899 | free (temp2); |
ccc6cda3 | 5900 | t[-1] = ':'; |
d166f048 | 5901 | *e2p = evalexp (temp1, &expok); |
ccc6cda3 | 5902 | free (temp1); |
d166f048 | 5903 | if (expok == 0) |
28ef6c31 | 5904 | return (0); |
ccc6cda3 | 5905 | if (*e2p < 0) |
28ef6c31 | 5906 | { |
b80f6443 | 5907 | internal_error (_("%s: substring expression < 0"), t); |
ccc6cda3 | 5908 | return (0); |
28ef6c31 | 5909 | } |
b80f6443 JA |
5910 | #if defined (ARRAY_VARS) |
5911 | /* In order to deal with sparse arrays, push the intelligence about how | |
5912 | to deal with the number of elements desired down to the array- | |
5913 | specific functions. */ | |
5914 | if (vtype != VT_ARRAYVAR) | |
5915 | #endif | |
5916 | { | |
5917 | *e2p += *e1p; /* want E2 chars starting at E1 */ | |
5918 | if (*e2p > len) | |
5919 | *e2p = len; | |
5920 | } | |
ccc6cda3 JA |
5921 | } |
5922 | else | |
5923 | *e2p = len; | |
5924 | ||
5925 | return (1); | |
5926 | } | |
5927 | ||
ccc6cda3 | 5928 | /* Return the type of variable specified by VARNAME (simple variable, |
cce855bc | 5929 | positional param, or array variable). Also return the value specified |
7117c2d2 JA |
5930 | by VARNAME (value of a variable or a reference to an array element). |
5931 | If this returns VT_VARIABLE, the caller assumes that CTLESC and CTLNUL | |
5932 | characters in the value are quoted with CTLESC and takes appropriate | |
5933 | steps. For convenience, *VALP is set to the dequoted VALUE. */ | |
ccc6cda3 | 5934 | static int |
b80f6443 | 5935 | get_var_and_type (varname, value, quoted, varp, valp) |
ccc6cda3 | 5936 | char *varname, *value; |
b80f6443 | 5937 | int quoted; |
ccc6cda3 JA |
5938 | SHELL_VAR **varp; |
5939 | char **valp; | |
5940 | { | |
5941 | int vtype; | |
5942 | char *temp; | |
5943 | #if defined (ARRAY_VARS) | |
5944 | SHELL_VAR *v; | |
5945 | #endif | |
5946 | ||
7117c2d2 JA |
5947 | /* This sets vtype to VT_VARIABLE or VT_POSPARMS */ |
5948 | vtype = (varname[0] == '@' || varname[0] == '*') && varname[1] == '\0'; | |
b80f6443 JA |
5949 | if (vtype == VT_POSPARMS && varname[0] == '*') |
5950 | vtype |= VT_STARSUB; | |
ccc6cda3 JA |
5951 | *varp = (SHELL_VAR *)NULL; |
5952 | ||
5953 | #if defined (ARRAY_VARS) | |
5954 | if (valid_array_reference (varname)) | |
5955 | { | |
5956 | v = array_variable_part (varname, &temp, (int *)0); | |
3185942a | 5957 | if (v && (array_p (v) || assoc_p (v))) |
f73dda09 JA |
5958 | { /* [ */ |
5959 | if (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']') | |
ccc6cda3 | 5960 | { |
3185942a | 5961 | /* Callers have to differentiate betwen indexed and associative */ |
ccc6cda3 | 5962 | vtype = VT_ARRAYVAR; |
b80f6443 JA |
5963 | if (temp[0] == '*') |
5964 | vtype |= VT_STARSUB; | |
3185942a | 5965 | *valp = array_p (v) ? (char *)array_cell (v) : (char *)assoc_cell (v); |
ccc6cda3 JA |
5966 | } |
5967 | else | |
5968 | { | |
d166f048 | 5969 | vtype = VT_ARRAYMEMBER; |
7117c2d2 | 5970 | *valp = array_value (varname, 1, (int *)NULL); |
ccc6cda3 JA |
5971 | } |
5972 | *varp = v; | |
5973 | } | |
95732b49 JA |
5974 | else if (v && (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']')) |
5975 | { | |
5976 | vtype = VT_VARIABLE; | |
5977 | *varp = v; | |
5978 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
5979 | *valp = dequote_string (value); | |
5980 | else | |
5981 | *valp = dequote_escapes (value); | |
5982 | } | |
ccc6cda3 | 5983 | else |
3185942a JA |
5984 | { |
5985 | vtype = VT_ARRAYMEMBER; | |
5986 | *varp = v; | |
5987 | *valp = array_value (varname, 1, (int *)NULL); | |
5988 | } | |
ccc6cda3 | 5989 | } |
3185942a | 5990 | else if ((v = find_variable (varname)) && (invisible_p (v) == 0) && (assoc_p (v) || array_p (v))) |
ccc6cda3 | 5991 | { |
7117c2d2 | 5992 | vtype = VT_ARRAYMEMBER; |
ccc6cda3 | 5993 | *varp = v; |
3185942a | 5994 | *valp = assoc_p (v) ? assoc_reference (assoc_cell (v), "0") : array_reference (array_cell (v), 0); |
ccc6cda3 JA |
5995 | } |
5996 | else | |
5997 | #endif | |
b80f6443 JA |
5998 | { |
5999 | if (value && vtype == VT_VARIABLE) | |
6000 | { | |
6001 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6002 | *valp = dequote_string (value); | |
6003 | else | |
6004 | *valp = dequote_escapes (value); | |
6005 | } | |
6006 | else | |
6007 | *valp = value; | |
6008 | } | |
ccc6cda3 JA |
6009 | |
6010 | return vtype; | |
6011 | } | |
6012 | ||
cce855bc JA |
6013 | /******************************************************/ |
6014 | /* */ | |
6015 | /* Functions to extract substrings of variable values */ | |
6016 | /* */ | |
6017 | /******************************************************/ | |
6018 | ||
b80f6443 JA |
6019 | #if defined (HANDLE_MULTIBYTE) |
6020 | /* Character-oriented rather than strictly byte-oriented substrings. S and | |
6021 | E, rather being strict indices into STRING, indicate character (possibly | |
6022 | multibyte character) positions that require calculation. | |
6023 | Used by the ${param:offset[:length]} expansion. */ | |
6024 | static char * | |
6025 | mb_substring (string, s, e) | |
6026 | char *string; | |
6027 | int s, e; | |
6028 | { | |
6029 | char *tt; | |
6030 | int start, stop, i, slen; | |
6031 | DECLARE_MBSTATE; | |
6032 | ||
6033 | start = 0; | |
95732b49 JA |
6034 | /* Don't need string length in ADVANCE_CHAR unless multibyte chars possible. */ |
6035 | slen = (MB_CUR_MAX > 1) ? STRLEN (string) : 0; | |
b80f6443 JA |
6036 | |
6037 | i = s; | |
6038 | while (string[start] && i--) | |
6039 | ADVANCE_CHAR (string, slen, start); | |
6040 | stop = start; | |
6041 | i = e - s; | |
6042 | while (string[stop] && i--) | |
6043 | ADVANCE_CHAR (string, slen, stop); | |
6044 | tt = substring (string, start, stop); | |
6045 | return tt; | |
6046 | } | |
6047 | #endif | |
6048 | ||
ccc6cda3 JA |
6049 | /* Process a variable substring expansion: ${name:e1[:e2]}. If VARNAME |
6050 | is `@', use the positional parameters; otherwise, use the value of | |
6051 | VARNAME. If VARNAME is an array variable, use the array elements. */ | |
6052 | ||
6053 | static char * | |
6054 | parameter_brace_substring (varname, value, substr, quoted) | |
6055 | char *varname, *value, *substr; | |
6056 | int quoted; | |
6057 | { | |
7117c2d2 | 6058 | intmax_t e1, e2; |
b80f6443 | 6059 | int vtype, r, starsub; |
0628567a | 6060 | char *temp, *val, *tt, *oname; |
ccc6cda3 JA |
6061 | SHELL_VAR *v; |
6062 | ||
6063 | if (value == 0) | |
6064 | return ((char *)NULL); | |
6065 | ||
0628567a | 6066 | oname = this_command_name; |
ccc6cda3 JA |
6067 | this_command_name = varname; |
6068 | ||
b80f6443 | 6069 | vtype = get_var_and_type (varname, value, quoted, &v, &val); |
ccc6cda3 | 6070 | if (vtype == -1) |
0628567a JA |
6071 | { |
6072 | this_command_name = oname; | |
6073 | return ((char *)NULL); | |
6074 | } | |
ccc6cda3 | 6075 | |
b80f6443 JA |
6076 | starsub = vtype & VT_STARSUB; |
6077 | vtype &= ~VT_STARSUB; | |
6078 | ||
3185942a | 6079 | r = verify_substring_values (v, val, substr, vtype, &e1, &e2); |
0628567a | 6080 | this_command_name = oname; |
e8ce775d | 6081 | if (r <= 0) |
7117c2d2 | 6082 | return ((r == 0) ? &expand_param_error : (char *)NULL); |
ccc6cda3 JA |
6083 | |
6084 | switch (vtype) | |
6085 | { | |
6086 | case VT_VARIABLE: | |
d166f048 | 6087 | case VT_ARRAYMEMBER: |
b80f6443 JA |
6088 | #if defined (HANDLE_MULTIBYTE) |
6089 | if (MB_CUR_MAX > 1) | |
6090 | tt = mb_substring (val, e1, e2); | |
6091 | else | |
6092 | #endif | |
7117c2d2 | 6093 | tt = substring (val, e1, e2); |
b80f6443 | 6094 | |
7117c2d2 JA |
6095 | if (vtype == VT_VARIABLE) |
6096 | FREE (val); | |
6097 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6098 | temp = quote_string (tt); | |
6099 | else | |
6100 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6101 | FREE (tt); | |
ccc6cda3 JA |
6102 | break; |
6103 | case VT_POSPARMS: | |
7117c2d2 JA |
6104 | tt = pos_params (varname, e1, e2, quoted); |
6105 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) | |
6106 | { | |
6107 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6108 | FREE (tt); | |
6109 | } | |
6110 | else | |
6111 | temp = tt; | |
ccc6cda3 JA |
6112 | break; |
6113 | #if defined (ARRAY_VARS) | |
6114 | case VT_ARRAYVAR: | |
3185942a JA |
6115 | if (assoc_p (v)) |
6116 | /* we convert to list and take first e2 elements starting at e1th | |
6117 | element -- officially undefined for now */ | |
6118 | temp = assoc_subrange (assoc_cell (v), e1, e2, starsub, quoted); | |
6119 | else | |
b80f6443 JA |
6120 | /* We want E2 to be the number of elements desired (arrays can be sparse, |
6121 | so verify_substring_values just returns the numbers specified and we | |
6122 | rely on array_subrange to understand how to deal with them). */ | |
3185942a | 6123 | temp = array_subrange (array_cell (v), e1, e2, starsub, quoted); |
f1be666c JA |
6124 | /* array_subrange now calls array_quote_escapes as appropriate, so the |
6125 | caller no longer needs to. */ | |
ccc6cda3 JA |
6126 | break; |
6127 | #endif | |
f73dda09 JA |
6128 | default: |
6129 | temp = (char *)NULL; | |
ccc6cda3 JA |
6130 | } |
6131 | ||
6132 | return temp; | |
6133 | } | |
6134 | ||
cce855bc JA |
6135 | /****************************************************************/ |
6136 | /* */ | |
6137 | /* Functions to perform pattern substitution on variable values */ | |
6138 | /* */ | |
6139 | /****************************************************************/ | |
6140 | ||
ccc6cda3 JA |
6141 | char * |
6142 | pat_subst (string, pat, rep, mflags) | |
6143 | char *string, *pat, *rep; | |
6144 | int mflags; | |
6145 | { | |
6146 | char *ret, *s, *e, *str; | |
6147 | int rsize, rptr, l, replen, mtype; | |
6148 | ||
b72432fd JA |
6149 | mtype = mflags & MATCH_TYPEMASK; |
6150 | ||
6151 | /* Special cases: | |
6152 | * 1. A null pattern with mtype == MATCH_BEG means to prefix STRING | |
6153 | * with REP and return the result. | |
6154 | * 2. A null pattern with mtype == MATCH_END means to append REP to | |
6155 | * STRING and return the result. | |
6156 | */ | |
6157 | if ((pat == 0 || *pat == 0) && (mtype == MATCH_BEG || mtype == MATCH_END)) | |
6158 | { | |
6159 | replen = STRLEN (rep); | |
6160 | l = strlen (string); | |
f73dda09 | 6161 | ret = (char *)xmalloc (replen + l + 2); |
bb70624e JA |
6162 | if (replen == 0) |
6163 | strcpy (ret, string); | |
6164 | else if (mtype == MATCH_BEG) | |
b72432fd JA |
6165 | { |
6166 | strcpy (ret, rep); | |
6167 | strcpy (ret + replen, string); | |
6168 | } | |
6169 | else | |
6170 | { | |
6171 | strcpy (ret, string); | |
6172 | strcpy (ret + l, rep); | |
6173 | } | |
6174 | return (ret); | |
6175 | } | |
6176 | ||
f73dda09 | 6177 | ret = (char *)xmalloc (rsize = 64); |
ccc6cda3 JA |
6178 | ret[0] = '\0'; |
6179 | ||
ccc6cda3 JA |
6180 | for (replen = STRLEN (rep), rptr = 0, str = string;;) |
6181 | { | |
6182 | if (match_pattern (str, pat, mtype, &s, &e) == 0) | |
6183 | break; | |
6184 | l = s - str; | |
6185 | RESIZE_MALLOCED_BUFFER (ret, rptr, (l + replen), rsize, 64); | |
6186 | ||
6187 | /* OK, now copy the leading unmatched portion of the string (from | |
6188 | str to s) to ret starting at rptr (the current offset). Then copy | |
28ef6c31 JA |
6189 | the replacement string at ret + rptr + (s - str). Increment |
6190 | rptr (if necessary) and str and go on. */ | |
ccc6cda3 JA |
6191 | if (l) |
6192 | { | |
6193 | strncpy (ret + rptr, str, l); | |
6194 | rptr += l; | |
6195 | } | |
6196 | if (replen) | |
6197 | { | |
6198 | strncpy (ret + rptr, rep, replen); | |
6199 | rptr += replen; | |
6200 | } | |
6201 | str = e; /* e == end of match */ | |
b80f6443 | 6202 | |
ccc6cda3 | 6203 | if (((mflags & MATCH_GLOBREP) == 0) || mtype != MATCH_ANY) |
28ef6c31 | 6204 | break; |
b80f6443 JA |
6205 | |
6206 | if (s == e) | |
0001803f CR |
6207 | { |
6208 | /* On a zero-length match, make sure we copy one character, since | |
6209 | we increment one character to avoid infinite recursion. */ | |
6210 | RESIZE_MALLOCED_BUFFER (ret, rptr, 1, rsize, 64); | |
6211 | ret[rptr++] = *str++; | |
6212 | e++; /* avoid infinite recursion on zero-length match */ | |
6213 | } | |
ccc6cda3 JA |
6214 | } |
6215 | ||
6216 | /* Now copy the unmatched portion of the input string */ | |
6217 | if (*str) | |
d166f048 JA |
6218 | { |
6219 | RESIZE_MALLOCED_BUFFER (ret, rptr, STRLEN(str) + 1, rsize, 64); | |
6220 | strcpy (ret + rptr, str); | |
6221 | } | |
ccc6cda3 JA |
6222 | else |
6223 | ret[rptr] = '\0'; | |
6224 | ||
6225 | return ret; | |
6226 | } | |
6227 | ||
6228 | /* Do pattern match and replacement on the positional parameters. */ | |
6229 | static char * | |
6230 | pos_params_pat_subst (string, pat, rep, mflags) | |
6231 | char *string, *pat, *rep; | |
6232 | int mflags; | |
6233 | { | |
6234 | WORD_LIST *save, *params; | |
6235 | WORD_DESC *w; | |
0628567a | 6236 | char *ret; |
3185942a | 6237 | int pchar, qflags; |
ccc6cda3 JA |
6238 | |
6239 | save = params = list_rest_of_args (); | |
6240 | if (save == 0) | |
6241 | return ((char *)NULL); | |
6242 | ||
6243 | for ( ; params; params = params->next) | |
6244 | { | |
6245 | ret = pat_subst (params->word->word, pat, rep, mflags); | |
95732b49 JA |
6246 | w = alloc_word_desc (); |
6247 | w->word = ret ? ret : savestring (""); | |
ccc6cda3 JA |
6248 | dispose_word (params->word); |
6249 | params->word = w; | |
ccc6cda3 JA |
6250 | } |
6251 | ||
3185942a JA |
6252 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; |
6253 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6254 | ||
6255 | #if 0 | |
b80f6443 JA |
6256 | if ((mflags & (MATCH_QUOTED|MATCH_STARSUB)) == (MATCH_QUOTED|MATCH_STARSUB)) |
6257 | ret = string_list_dollar_star (quote_list (save)); | |
3185942a JA |
6258 | else if ((mflags & MATCH_STARSUB) == MATCH_STARSUB) |
6259 | ret = string_list_dollar_star (save); | |
6260 | else if ((mflags & MATCH_QUOTED) == MATCH_QUOTED) | |
6261 | ret = string_list_dollar_at (save, qflags); | |
b80f6443 | 6262 | else |
3185942a JA |
6263 | ret = string_list_dollar_star (save); |
6264 | #else | |
6265 | ret = string_list_pos_params (pchar, save, qflags); | |
6266 | #endif | |
6267 | ||
ccc6cda3 JA |
6268 | dispose_words (save); |
6269 | ||
6270 | return (ret); | |
6271 | } | |
6272 | ||
cce855bc JA |
6273 | /* Perform pattern substitution on VALUE, which is the expansion of |
6274 | VARNAME. PATSUB is an expression supplying the pattern to match | |
6275 | and the string to substitute. QUOTED is a flags word containing | |
6276 | the type of quoting currently in effect. */ | |
ccc6cda3 JA |
6277 | static char * |
6278 | parameter_brace_patsub (varname, value, patsub, quoted) | |
6279 | char *varname, *value, *patsub; | |
6280 | int quoted; | |
6281 | { | |
3185942a | 6282 | int vtype, mflags, starsub, delim; |
7117c2d2 | 6283 | char *val, *temp, *pat, *rep, *p, *lpatsub, *tt; |
ccc6cda3 JA |
6284 | SHELL_VAR *v; |
6285 | ||
6286 | if (value == 0) | |
6287 | return ((char *)NULL); | |
6288 | ||
6289 | this_command_name = varname; | |
6290 | ||
b80f6443 | 6291 | vtype = get_var_and_type (varname, value, quoted, &v, &val); |
ccc6cda3 JA |
6292 | if (vtype == -1) |
6293 | return ((char *)NULL); | |
6294 | ||
b80f6443 JA |
6295 | starsub = vtype & VT_STARSUB; |
6296 | vtype &= ~VT_STARSUB; | |
6297 | ||
ccc6cda3 | 6298 | mflags = 0; |
f1be666c JA |
6299 | if (patsub && *patsub == '/') |
6300 | { | |
6301 | mflags |= MATCH_GLOBREP; | |
6302 | patsub++; | |
6303 | } | |
7117c2d2 JA |
6304 | |
6305 | /* Malloc this because expand_string_if_necessary or one of the expansion | |
6306 | functions in its call chain may free it on a substitution error. */ | |
bb70624e | 6307 | lpatsub = savestring (patsub); |
ccc6cda3 JA |
6308 | |
6309 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6310 | mflags |= MATCH_QUOTED; | |
6311 | ||
b80f6443 JA |
6312 | if (starsub) |
6313 | mflags |= MATCH_STARSUB; | |
6314 | ||
0628567a JA |
6315 | /* If the pattern starts with a `/', make sure we skip over it when looking |
6316 | for the replacement delimiter. */ | |
3185942a | 6317 | #if 0 |
0628567a | 6318 | if (rep = quoted_strchr ((*patsub == '/') ? lpatsub+1 : lpatsub, '/', ST_BACKSL)) |
ccc6cda3 JA |
6319 | *rep++ = '\0'; |
6320 | else | |
6321 | rep = (char *)NULL; | |
3185942a JA |
6322 | #else |
6323 | delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0); | |
6324 | if (lpatsub[delim] == '/') | |
6325 | { | |
6326 | lpatsub[delim] = 0; | |
6327 | rep = lpatsub + delim + 1; | |
6328 | } | |
6329 | else | |
6330 | rep = (char *)NULL; | |
6331 | #endif | |
ccc6cda3 JA |
6332 | |
6333 | if (rep && *rep == '\0') | |
6334 | rep = (char *)NULL; | |
6335 | ||
b80f6443 JA |
6336 | /* Perform the same expansions on the pattern as performed by the |
6337 | pattern removal expansions. */ | |
6338 | pat = getpattern (lpatsub, quoted, 1); | |
bb70624e | 6339 | |
ccc6cda3 | 6340 | if (rep) |
d166f048 JA |
6341 | { |
6342 | if ((mflags & MATCH_QUOTED) == 0) | |
f73dda09 | 6343 | rep = expand_string_if_necessary (rep, quoted, expand_string_unsplit); |
d166f048 | 6344 | else |
f73dda09 | 6345 | rep = expand_string_to_string_internal (rep, quoted, expand_string_unsplit); |
d166f048 | 6346 | } |
ccc6cda3 | 6347 | |
0628567a | 6348 | /* ksh93 doesn't allow the match specifier to be a part of the expanded |
f1be666c JA |
6349 | pattern. This is an extension. Make sure we don't anchor the pattern |
6350 | at the beginning or end of the string if we're doing global replacement, | |
6351 | though. */ | |
ccc6cda3 | 6352 | p = pat; |
f1be666c JA |
6353 | if (mflags & MATCH_GLOBREP) |
6354 | mflags |= MATCH_ANY; | |
0628567a | 6355 | else if (pat && pat[0] == '#') |
ccc6cda3 JA |
6356 | { |
6357 | mflags |= MATCH_BEG; | |
6358 | p++; | |
6359 | } | |
d166f048 | 6360 | else if (pat && pat[0] == '%') |
ccc6cda3 JA |
6361 | { |
6362 | mflags |= MATCH_END; | |
6363 | p++; | |
6364 | } | |
6365 | else | |
6366 | mflags |= MATCH_ANY; | |
6367 | ||
cce855bc JA |
6368 | /* OK, we now want to substitute REP for PAT in VAL. If |
6369 | flags & MATCH_GLOBREP is non-zero, the substitution is done | |
6370 | everywhere, otherwise only the first occurrence of PAT is | |
7117c2d2 JA |
6371 | replaced. The pattern matching code doesn't understand |
6372 | CTLESC quoting CTLESC and CTLNUL so we use the dequoted variable | |
6373 | values passed in (VT_VARIABLE) so the pattern substitution | |
6374 | code works right. We need to requote special chars after | |
6375 | we're done for VT_VARIABLE and VT_ARRAYMEMBER, and for the | |
6376 | other cases if QUOTED == 0, since the posparams and arrays | |
6377 | indexed by * or @ do special things when QUOTED != 0. */ | |
6378 | ||
ccc6cda3 JA |
6379 | switch (vtype) |
6380 | { | |
6381 | case VT_VARIABLE: | |
d166f048 | 6382 | case VT_ARRAYMEMBER: |
ccc6cda3 | 6383 | temp = pat_subst (val, p, rep, mflags); |
7117c2d2 JA |
6384 | if (vtype == VT_VARIABLE) |
6385 | FREE (val); | |
6386 | if (temp) | |
6387 | { | |
3185942a | 6388 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); |
7117c2d2 JA |
6389 | free (temp); |
6390 | temp = tt; | |
6391 | } | |
ccc6cda3 JA |
6392 | break; |
6393 | case VT_POSPARMS: | |
6394 | temp = pos_params_pat_subst (val, p, rep, mflags); | |
7117c2d2 JA |
6395 | if (temp && (mflags & MATCH_QUOTED) == 0) |
6396 | { | |
6397 | tt = quote_escapes (temp); | |
6398 | free (temp); | |
6399 | temp = tt; | |
6400 | } | |
ccc6cda3 JA |
6401 | break; |
6402 | #if defined (ARRAY_VARS) | |
6403 | case VT_ARRAYVAR: | |
3185942a JA |
6404 | temp = assoc_p (v) ? assoc_patsub (assoc_cell (v), p, rep, mflags) |
6405 | : array_patsub (array_cell (v), p, rep, mflags); | |
6406 | /* Don't call quote_escapes anymore; array_patsub calls | |
6407 | array_quote_escapes as appropriate before adding the | |
6408 | space separators; ditto for assoc_patsub. */ | |
6409 | break; | |
6410 | #endif | |
6411 | } | |
6412 | ||
6413 | FREE (pat); | |
6414 | FREE (rep); | |
6415 | free (lpatsub); | |
6416 | ||
6417 | return temp; | |
6418 | } | |
6419 | ||
6420 | /****************************************************************/ | |
6421 | /* */ | |
6422 | /* Functions to perform case modification on variable values */ | |
6423 | /* */ | |
6424 | /****************************************************************/ | |
6425 | ||
6426 | /* Do case modification on the positional parameters. */ | |
6427 | ||
6428 | static char * | |
6429 | pos_params_modcase (string, pat, modop, mflags) | |
6430 | char *string, *pat; | |
6431 | int modop; | |
6432 | int mflags; | |
6433 | { | |
6434 | WORD_LIST *save, *params; | |
6435 | WORD_DESC *w; | |
6436 | char *ret; | |
6437 | int pchar, qflags; | |
6438 | ||
6439 | save = params = list_rest_of_args (); | |
6440 | if (save == 0) | |
6441 | return ((char *)NULL); | |
6442 | ||
6443 | for ( ; params; params = params->next) | |
6444 | { | |
6445 | ret = sh_modcase (params->word->word, pat, modop); | |
6446 | w = alloc_word_desc (); | |
6447 | w->word = ret ? ret : savestring (""); | |
6448 | dispose_word (params->word); | |
6449 | params->word = w; | |
6450 | } | |
6451 | ||
6452 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; | |
6453 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6454 | ||
6455 | ret = string_list_pos_params (pchar, save, qflags); | |
6456 | dispose_words (save); | |
6457 | ||
6458 | return (ret); | |
6459 | } | |
6460 | ||
6461 | /* Perform case modification on VALUE, which is the expansion of | |
6462 | VARNAME. MODSPEC is an expression supplying the type of modification | |
6463 | to perform. QUOTED is a flags word containing the type of quoting | |
6464 | currently in effect. */ | |
6465 | static char * | |
6466 | parameter_brace_casemod (varname, value, modspec, patspec, quoted) | |
6467 | char *varname, *value; | |
6468 | int modspec; | |
6469 | char *patspec; | |
6470 | int quoted; | |
6471 | { | |
6472 | int vtype, starsub, modop, mflags, x; | |
6473 | char *val, *temp, *pat, *p, *lpat, *tt; | |
6474 | SHELL_VAR *v; | |
6475 | ||
6476 | if (value == 0) | |
6477 | return ((char *)NULL); | |
6478 | ||
6479 | this_command_name = varname; | |
6480 | ||
6481 | vtype = get_var_and_type (varname, value, quoted, &v, &val); | |
6482 | if (vtype == -1) | |
6483 | return ((char *)NULL); | |
6484 | ||
6485 | starsub = vtype & VT_STARSUB; | |
6486 | vtype &= ~VT_STARSUB; | |
6487 | ||
6488 | modop = 0; | |
6489 | mflags = 0; | |
6490 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6491 | mflags |= MATCH_QUOTED; | |
6492 | if (starsub) | |
6493 | mflags |= MATCH_STARSUB; | |
6494 | ||
6495 | p = patspec; | |
6496 | if (modspec == '^') | |
6497 | { | |
6498 | x = p && p[0] == modspec; | |
17345e5a | 6499 | modop = x ? CASE_UPPER : CASE_UPFIRST; |
3185942a JA |
6500 | p += x; |
6501 | } | |
6502 | else if (modspec == ',') | |
6503 | { | |
6504 | x = p && p[0] == modspec; | |
17345e5a | 6505 | modop = x ? CASE_LOWER : CASE_LOWFIRST; |
3185942a JA |
6506 | p += x; |
6507 | } | |
6508 | else if (modspec == '~') | |
6509 | { | |
6510 | x = p && p[0] == modspec; | |
6511 | modop = x ? CASE_TOGGLEALL : CASE_TOGGLE; | |
6512 | p += x; | |
6513 | } | |
6514 | ||
6515 | lpat = p ? savestring (p) : 0; | |
6516 | /* Perform the same expansions on the pattern as performed by the | |
6517 | pattern removal expansions. FOR LATER */ | |
6518 | pat = lpat ? getpattern (lpat, quoted, 1) : 0; | |
6519 | ||
6520 | /* OK, now we do the case modification. */ | |
6521 | switch (vtype) | |
6522 | { | |
6523 | case VT_VARIABLE: | |
6524 | case VT_ARRAYMEMBER: | |
6525 | temp = sh_modcase (val, pat, modop); | |
6526 | if (vtype == VT_VARIABLE) | |
6527 | FREE (val); | |
6528 | if (temp) | |
6529 | { | |
6530 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); | |
6531 | free (temp); | |
6532 | temp = tt; | |
6533 | } | |
6534 | break; | |
6535 | ||
6536 | case VT_POSPARMS: | |
6537 | temp = pos_params_modcase (val, pat, modop, mflags); | |
6538 | if (temp && (mflags & MATCH_QUOTED) == 0) | |
7117c2d2 JA |
6539 | { |
6540 | tt = quote_escapes (temp); | |
6541 | free (temp); | |
6542 | temp = tt; | |
6543 | } | |
3185942a JA |
6544 | break; |
6545 | ||
6546 | #if defined (ARRAY_VARS) | |
6547 | case VT_ARRAYVAR: | |
6548 | temp = assoc_p (v) ? assoc_modcase (assoc_cell (v), pat, modop, mflags) | |
6549 | : array_modcase (array_cell (v), pat, modop, mflags); | |
6550 | /* Don't call quote_escapes; array_modcase calls array_quote_escapes | |
6551 | as appropriate before adding the space separators; ditto for | |
6552 | assoc_modcase. */ | |
ccc6cda3 JA |
6553 | break; |
6554 | #endif | |
6555 | } | |
6556 | ||
6557 | FREE (pat); | |
3185942a | 6558 | free (lpat); |
ccc6cda3 JA |
6559 | |
6560 | return temp; | |
6561 | } | |
6562 | ||
0628567a JA |
6563 | /* Check for unbalanced parens in S, which is the contents of $(( ... )). If |
6564 | any occur, this must be a nested command substitution, so return 0. | |
6565 | Otherwise, return 1. A valid arithmetic expression must always have a | |
6566 | ( before a matching ), so any cases where there are more right parens | |
6567 | means that this must not be an arithmetic expression, though the parser | |
6568 | will not accept it without a balanced total number of parens. */ | |
6569 | static int | |
6570 | chk_arithsub (s, len) | |
6571 | const char *s; | |
6572 | int len; | |
6573 | { | |
6574 | int i, count; | |
6575 | DECLARE_MBSTATE; | |
6576 | ||
6577 | i = count = 0; | |
6578 | while (i < len) | |
6579 | { | |
0001803f | 6580 | if (s[i] == LPAREN) |
0628567a | 6581 | count++; |
0001803f | 6582 | else if (s[i] == RPAREN) |
0628567a JA |
6583 | { |
6584 | count--; | |
6585 | if (count < 0) | |
6586 | return 0; | |
6587 | } | |
6588 | ||
6589 | switch (s[i]) | |
6590 | { | |
6591 | default: | |
6592 | ADVANCE_CHAR (s, len, i); | |
6593 | break; | |
6594 | ||
6595 | case '\\': | |
6596 | i++; | |
6597 | if (s[i]) | |
6598 | ADVANCE_CHAR (s, len, i); | |
6599 | break; | |
6600 | ||
6601 | case '\'': | |
6602 | i = skip_single_quoted (s, len, ++i); | |
6603 | break; | |
6604 | ||
6605 | case '"': | |
6606 | i = skip_double_quoted ((char *)s, len, ++i); | |
6607 | break; | |
6608 | } | |
6609 | } | |
6610 | ||
6611 | return (count == 0); | |
6612 | } | |
6613 | ||
cce855bc JA |
6614 | /****************************************************************/ |
6615 | /* */ | |
6616 | /* Functions to perform parameter expansion on a string */ | |
6617 | /* */ | |
6618 | /****************************************************************/ | |
6619 | ||
3185942a | 6620 | /* ${[#][!]name[[:][^[^]][,[,]]#[#]%[%]-=?+[word][:e1[:e2]]]} */ |
95732b49 | 6621 | static WORD_DESC * |
0001803f | 6622 | parameter_brace_expand (string, indexp, quoted, pflags, quoted_dollar_atp, contains_dollar_at) |
ccc6cda3 | 6623 | char *string; |
0001803f | 6624 | int *indexp, quoted, *quoted_dollar_atp, *contains_dollar_at, pflags; |
ccc6cda3 JA |
6625 | { |
6626 | int check_nullness, var_is_set, var_is_null, var_is_special; | |
3185942a | 6627 | int want_substring, want_indir, want_patsub, want_casemod; |
ccc6cda3 | 6628 | char *name, *value, *temp, *temp1; |
95732b49 | 6629 | WORD_DESC *tdesc, *ret; |
3185942a | 6630 | int t_index, sindex, c, tflag, modspec; |
7117c2d2 | 6631 | intmax_t number; |
ccc6cda3 | 6632 | |
3185942a | 6633 | temp = temp1 = value = (char *)NULL; |
ccc6cda3 | 6634 | var_is_set = var_is_null = var_is_special = check_nullness = 0; |
3185942a | 6635 | want_substring = want_indir = want_patsub = want_casemod = 0; |
ccc6cda3 | 6636 | |
cce855bc JA |
6637 | sindex = *indexp; |
6638 | t_index = ++sindex; | |
0628567a JA |
6639 | /* ${#var} doesn't have any of the other parameter expansions on it. */ |
6640 | if (string[t_index] == '#' && legal_variable_starter (string[t_index+1])) /* {{ */ | |
3185942a | 6641 | name = string_extract (string, &t_index, "}", SX_VARNAME); |
0628567a | 6642 | else |
3185942a JA |
6643 | #if defined (CASEMOD_EXPANSIONS) |
6644 | /* To enable case-toggling expansions using the `~' operator character | |
6645 | change the 1 to 0. */ | |
6646 | # if defined (CASEMOD_CAPCASE) | |
6647 | name = string_extract (string, &t_index, "#%^,~:-=?+/}", SX_VARNAME); | |
6648 | # else | |
6649 | name = string_extract (string, &t_index, "#%^,:-=?+/}", SX_VARNAME); | |
6650 | # endif /* CASEMOD_CAPCASE */ | |
6651 | #else | |
6652 | name = string_extract (string, &t_index, "#%:-=?+/}", SX_VARNAME); | |
6653 | #endif /* CASEMOD_EXPANSIONS */ | |
cce855bc | 6654 | |
95732b49 JA |
6655 | ret = 0; |
6656 | tflag = 0; | |
6657 | ||
cce855bc JA |
6658 | /* If the name really consists of a special variable, then make sure |
6659 | that we have the entire name. We don't allow indirect references | |
6660 | to special variables except `#', `?', `@' and `*'. */ | |
6661 | if ((sindex == t_index && | |
ccc6cda3 JA |
6662 | (string[t_index] == '-' || |
6663 | string[t_index] == '?' || | |
cce855bc JA |
6664 | string[t_index] == '#')) || |
6665 | (sindex == t_index - 1 && string[sindex] == '!' && | |
28ef6c31 JA |
6666 | (string[t_index] == '#' || |
6667 | string[t_index] == '?' || | |
6668 | string[t_index] == '@' || | |
6669 | string[t_index] == '*'))) | |
ccc6cda3 JA |
6670 | { |
6671 | t_index++; | |
6672 | free (name); | |
6673 | temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0); | |
f73dda09 | 6674 | name = (char *)xmalloc (3 + (strlen (temp1))); |
ccc6cda3 JA |
6675 | *name = string[sindex]; |
6676 | if (string[sindex] == '!') | |
6677 | { | |
28ef6c31 JA |
6678 | /* indirect reference of $#, $?, $@, or $* */ |
6679 | name[1] = string[sindex + 1]; | |
6680 | strcpy (name + 2, temp1); | |
ccc6cda3 | 6681 | } |
cce855bc | 6682 | else |
ccc6cda3 JA |
6683 | strcpy (name + 1, temp1); |
6684 | free (temp1); | |
6685 | } | |
6686 | sindex = t_index; | |
6687 | ||
6688 | /* Find out what character ended the variable name. Then | |
6689 | do the appropriate thing. */ | |
6690 | if (c = string[sindex]) | |
6691 | sindex++; | |
6692 | ||
6693 | /* If c is followed by one of the valid parameter expansion | |
6694 | characters, move past it as normal. If not, assume that | |
6695 | a substring specification is being given, and do not move | |
6696 | past it. */ | |
28ef6c31 | 6697 | if (c == ':' && VALID_PARAM_EXPAND_CHAR (string[sindex])) |
ccc6cda3 JA |
6698 | { |
6699 | check_nullness++; | |
6700 | if (c = string[sindex]) | |
6701 | sindex++; | |
6702 | } | |
cce855bc | 6703 | else if (c == ':' && string[sindex] != RBRACE) |
ccc6cda3 | 6704 | want_substring = 1; |
cce855bc | 6705 | else if (c == '/' && string[sindex] != RBRACE) |
ccc6cda3 | 6706 | want_patsub = 1; |
3185942a JA |
6707 | #if defined (CASEMOD_EXPANSIONS) |
6708 | else if (c == '^' || c == ',' || c == '~') | |
6709 | { | |
6710 | modspec = c; | |
6711 | want_casemod = 1; | |
6712 | } | |
6713 | #endif | |
ccc6cda3 | 6714 | |
cce855bc JA |
6715 | /* Catch the valid and invalid brace expressions that made it through the |
6716 | tests above. */ | |
6717 | /* ${#-} is a valid expansion and means to take the length of $-. | |
6718 | Similarly for ${#?} and ${##}... */ | |
6719 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
28ef6c31 | 6720 | VALID_SPECIAL_LENGTH_PARAM (c) && string[sindex] == RBRACE) |
cce855bc | 6721 | { |
f73dda09 | 6722 | name = (char *)xrealloc (name, 3); |
cce855bc JA |
6723 | name[1] = c; |
6724 | name[2] = '\0'; | |
6725 | c = string[sindex++]; | |
6726 | } | |
6727 | ||
6728 | /* ...but ${#%}, ${#:}, ${#=}, ${#+}, and ${#/} are errors. */ | |
6729 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
6730 | member (c, "%:=+/") && string[sindex] == RBRACE) | |
6731 | { | |
6732 | temp = (char *)NULL; | |
6733 | goto bad_substitution; | |
6734 | } | |
6735 | ||
6736 | /* Indirect expansion begins with a `!'. A valid indirect expansion is | |
6737 | either a variable name, one of the positional parameters or a special | |
6738 | variable that expands to one of the positional parameters. */ | |
6739 | want_indir = *name == '!' && | |
f73dda09 | 6740 | (legal_variable_starter ((unsigned char)name[1]) || DIGIT (name[1]) |
7117c2d2 | 6741 | || VALID_INDIR_PARAM (name[1])); |
ccc6cda3 JA |
6742 | |
6743 | /* Determine the value of this variable. */ | |
6744 | ||
cce855bc | 6745 | /* Check for special variables, directly referenced. */ |
bb70624e | 6746 | if (SPECIAL_VAR (name, want_indir)) |
ccc6cda3 JA |
6747 | var_is_special++; |
6748 | ||
cce855bc JA |
6749 | /* Check for special expansion things, like the length of a parameter */ |
6750 | if (*name == '#' && name[1]) | |
ccc6cda3 | 6751 | { |
cce855bc | 6752 | /* If we are not pointing at the character just after the |
28ef6c31 JA |
6753 | closing brace, then we haven't gotten all of the name. |
6754 | Since it begins with a special character, this is a bad | |
6755 | substitution. Also check NAME for validity before trying | |
6756 | to go on. */ | |
cce855bc | 6757 | if (string[sindex - 1] != RBRACE || (valid_length_expression (name) == 0)) |
ccc6cda3 JA |
6758 | { |
6759 | temp = (char *)NULL; | |
6760 | goto bad_substitution; | |
6761 | } | |
6762 | ||
6763 | number = parameter_brace_expand_length (name); | |
6764 | free (name); | |
6765 | ||
6766 | *indexp = sindex; | |
95732b49 JA |
6767 | if (number < 0) |
6768 | return (&expand_wdesc_error); | |
6769 | else | |
6770 | { | |
6771 | ret = alloc_word_desc (); | |
6772 | ret->word = itos (number); | |
6773 | return ret; | |
6774 | } | |
ccc6cda3 JA |
6775 | } |
6776 | ||
6777 | /* ${@} is identical to $@. */ | |
6778 | if (name[0] == '@' && name[1] == '\0') | |
6779 | { | |
6780 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
6781 | *quoted_dollar_atp = 1; | |
6782 | ||
6783 | if (contains_dollar_at) | |
6784 | *contains_dollar_at = 1; | |
6785 | } | |
6786 | ||
b80f6443 | 6787 | /* Process ${!PREFIX*} expansion. */ |
bb70624e JA |
6788 | if (want_indir && string[sindex - 1] == RBRACE && |
6789 | (string[sindex - 2] == '*' || string[sindex - 2] == '@') && | |
f73dda09 | 6790 | legal_variable_starter ((unsigned char) name[1])) |
bb70624e JA |
6791 | { |
6792 | char **x; | |
6793 | WORD_LIST *xlist; | |
6794 | ||
6795 | temp1 = savestring (name + 1); | |
6796 | number = strlen (temp1); | |
6797 | temp1[number - 1] = '\0'; | |
6798 | x = all_variables_matching_prefix (temp1); | |
7117c2d2 | 6799 | xlist = strvec_to_word_list (x, 0, 0); |
28ef6c31 JA |
6800 | if (string[sindex - 2] == '*') |
6801 | temp = string_list_dollar_star (xlist); | |
6802 | else | |
6803 | { | |
6804 | temp = string_list_dollar_at (xlist, quoted); | |
6805 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
6806 | *quoted_dollar_atp = 1; | |
6807 | if (contains_dollar_at) | |
6808 | *contains_dollar_at = 1; | |
6809 | } | |
bb70624e | 6810 | free (x); |
89a92869 | 6811 | dispose_words (xlist); |
bb70624e JA |
6812 | free (temp1); |
6813 | *indexp = sindex; | |
95732b49 JA |
6814 | |
6815 | ret = alloc_word_desc (); | |
6816 | ret->word = temp; | |
6817 | return ret; | |
bb70624e | 6818 | } |
b80f6443 JA |
6819 | |
6820 | #if defined (ARRAY_VARS) | |
6821 | /* Process ${!ARRAY[@]} and ${!ARRAY[*]} expansion. */ /* [ */ | |
6822 | if (want_indir && string[sindex - 1] == RBRACE && | |
6823 | string[sindex - 2] == ']' && valid_array_reference (name+1)) | |
6824 | { | |
6825 | char *x, *x1; | |
6826 | ||
6827 | temp1 = savestring (name + 1); | |
6828 | x = array_variable_name (temp1, &x1, (int *)0); /* [ */ | |
6829 | FREE (x); | |
6830 | if (ALL_ELEMENT_SUB (x1[0]) && x1[1] == ']') | |
6831 | { | |
3185942a | 6832 | temp = array_keys (temp1, quoted); /* handles assoc vars too */ |
b80f6443 JA |
6833 | if (x1[0] == '@') |
6834 | { | |
6835 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
6836 | *quoted_dollar_atp = 1; | |
6837 | if (contains_dollar_at) | |
6838 | *contains_dollar_at = 1; | |
6839 | } | |
6840 | ||
6841 | free (temp1); | |
6842 | *indexp = sindex; | |
95732b49 JA |
6843 | |
6844 | ret = alloc_word_desc (); | |
6845 | ret->word = temp; | |
6846 | return ret; | |
b80f6443 JA |
6847 | } |
6848 | ||
6849 | free (temp1); | |
6850 | } | |
6851 | #endif /* ARRAY_VARS */ | |
bb70624e | 6852 | |
ccc6cda3 JA |
6853 | /* Make sure that NAME is valid before trying to go on. */ |
6854 | if (valid_brace_expansion_word (want_indir ? name + 1 : name, | |
6855 | var_is_special) == 0) | |
6856 | { | |
6857 | temp = (char *)NULL; | |
6858 | goto bad_substitution; | |
6859 | } | |
6860 | ||
6861 | if (want_indir) | |
95732b49 JA |
6862 | tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at); |
6863 | else | |
0001803f | 6864 | tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&PF_NOSPLIT2)); |
95732b49 JA |
6865 | |
6866 | if (tdesc) | |
6867 | { | |
6868 | temp = tdesc->word; | |
6869 | tflag = tdesc->flags; | |
6870 | dispose_word_desc (tdesc); | |
6871 | } | |
ccc6cda3 | 6872 | else |
95732b49 | 6873 | temp = (char *)0; |
ccc6cda3 JA |
6874 | |
6875 | #if defined (ARRAY_VARS) | |
cce855bc | 6876 | if (valid_array_reference (name)) |
b80f6443 | 6877 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 JA |
6878 | #endif |
6879 | ||
6880 | var_is_set = temp != (char *)0; | |
6881 | var_is_null = check_nullness && (var_is_set == 0 || *temp == 0); | |
6882 | ||
6883 | /* Get the rest of the stuff inside the braces. */ | |
cce855bc | 6884 | if (c && c != RBRACE) |
ccc6cda3 JA |
6885 | { |
6886 | /* Extract the contents of the ${ ... } expansion | |
28ef6c31 | 6887 | according to the Posix.2 rules. */ |
7117c2d2 | 6888 | value = extract_dollar_brace_string (string, &sindex, quoted, 0); |
cce855bc | 6889 | if (string[sindex] == RBRACE) |
28ef6c31 | 6890 | sindex++; |
ccc6cda3 JA |
6891 | else |
6892 | goto bad_substitution; | |
6893 | } | |
6894 | else | |
6895 | value = (char *)NULL; | |
726f6388 | 6896 | |
ccc6cda3 JA |
6897 | *indexp = sindex; |
6898 | ||
6899 | /* If this is a substring spec, process it and add the result. */ | |
6900 | if (want_substring) | |
726f6388 | 6901 | { |
ccc6cda3 JA |
6902 | temp1 = parameter_brace_substring (name, temp, value, quoted); |
6903 | FREE (name); | |
6904 | FREE (value); | |
6905 | FREE (temp); | |
95732b49 JA |
6906 | |
6907 | if (temp1 == &expand_param_error) | |
6908 | return (&expand_wdesc_error); | |
6909 | else if (temp1 == &expand_param_fatal) | |
6910 | return (&expand_wdesc_fatal); | |
6911 | ||
6912 | ret = alloc_word_desc (); | |
6913 | ret->word = temp1; | |
0628567a JA |
6914 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
6915 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
95732b49 | 6916 | return ret; |
726f6388 | 6917 | } |
ccc6cda3 | 6918 | else if (want_patsub) |
726f6388 | 6919 | { |
ccc6cda3 JA |
6920 | temp1 = parameter_brace_patsub (name, temp, value, quoted); |
6921 | FREE (name); | |
6922 | FREE (value); | |
6923 | FREE (temp); | |
95732b49 JA |
6924 | |
6925 | if (temp1 == &expand_param_error) | |
6926 | return (&expand_wdesc_error); | |
6927 | else if (temp1 == &expand_param_fatal) | |
6928 | return (&expand_wdesc_fatal); | |
6929 | ||
6930 | ret = alloc_word_desc (); | |
6931 | ret->word = temp1; | |
3185942a JA |
6932 | ret = alloc_word_desc (); |
6933 | ret->word = temp1; | |
6934 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
6935 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
95732b49 | 6936 | return ret; |
ccc6cda3 | 6937 | } |
3185942a JA |
6938 | #if defined (CASEMOD_EXPANSIONS) |
6939 | else if (want_casemod) | |
6940 | { | |
6941 | temp1 = parameter_brace_casemod (name, temp, modspec, value, quoted); | |
6942 | FREE (name); | |
6943 | FREE (value); | |
6944 | FREE (temp); | |
6945 | ||
6946 | if (temp1 == &expand_param_error) | |
6947 | return (&expand_wdesc_error); | |
6948 | else if (temp1 == &expand_param_fatal) | |
6949 | return (&expand_wdesc_fatal); | |
6950 | ||
6951 | ret = alloc_word_desc (); | |
6952 | ret->word = temp1; | |
6953 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
6954 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
6955 | return ret; | |
6956 | } | |
6957 | #endif | |
726f6388 | 6958 | |
ccc6cda3 JA |
6959 | /* Do the right thing based on which character ended the variable name. */ |
6960 | switch (c) | |
6961 | { | |
6962 | default: | |
6963 | case '\0': | |
6964 | bad_substitution: | |
b80f6443 | 6965 | report_error (_("%s: bad substitution"), string ? string : "??"); |
ccc6cda3 JA |
6966 | FREE (value); |
6967 | FREE (temp); | |
6968 | free (name); | |
95732b49 | 6969 | return &expand_wdesc_error; |
ccc6cda3 | 6970 | |
cce855bc | 6971 | case RBRACE: |
89a92869 | 6972 | if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1])) |
28ef6c31 | 6973 | { |
89a92869 | 6974 | last_command_exit_value = EXECUTION_FAILURE; |
7117c2d2 | 6975 | err_unboundvar (name); |
ccc6cda3 JA |
6976 | FREE (value); |
6977 | FREE (temp); | |
6978 | free (name); | |
95732b49 | 6979 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
726f6388 | 6980 | } |
ccc6cda3 | 6981 | break; |
726f6388 | 6982 | |
ccc6cda3 JA |
6983 | case '#': /* ${param#[#]pattern} */ |
6984 | case '%': /* ${param%[%]pattern} */ | |
6985 | if (value == 0 || *value == '\0' || temp == 0 || *temp == '\0') | |
28ef6c31 JA |
6986 | { |
6987 | FREE (value); | |
ccc6cda3 | 6988 | break; |
28ef6c31 | 6989 | } |
7117c2d2 | 6990 | temp1 = parameter_brace_remove_pattern (name, temp, value, c, quoted); |
ccc6cda3 JA |
6991 | free (temp); |
6992 | free (value); | |
3185942a JA |
6993 | |
6994 | ret = alloc_word_desc (); | |
6995 | ret->word = temp1; | |
6996 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
6997 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
6998 | return ret; | |
ccc6cda3 JA |
6999 | |
7000 | case '-': | |
7001 | case '=': | |
7002 | case '?': | |
7003 | case '+': | |
7004 | if (var_is_set && var_is_null == 0) | |
28ef6c31 JA |
7005 | { |
7006 | /* If the operator is `+', we don't want the value of the named | |
7007 | variable for anything, just the value of the right hand side. */ | |
bb70624e | 7008 | |
ccc6cda3 JA |
7009 | if (c == '+') |
7010 | { | |
28ef6c31 JA |
7011 | /* XXX -- if we're double-quoted and the named variable is "$@", |
7012 | we want to turn off any special handling of "$@" -- | |
7013 | we're not using it, so whatever is on the rhs applies. */ | |
7014 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7015 | *quoted_dollar_atp = 0; | |
7016 | if (contains_dollar_at) | |
7017 | *contains_dollar_at = 0; | |
7018 | ||
ccc6cda3 JA |
7019 | FREE (temp); |
7020 | if (value) | |
28ef6c31 | 7021 | { |
95732b49 JA |
7022 | ret = parameter_brace_expand_rhs (name, value, c, |
7023 | quoted, | |
7024 | quoted_dollar_atp, | |
7025 | contains_dollar_at); | |
7026 | /* XXX - fix up later, esp. noting presence of | |
7027 | W_HASQUOTEDNULL in ret->flags */ | |
ccc6cda3 JA |
7028 | free (value); |
7029 | } | |
7030 | else | |
28ef6c31 | 7031 | temp = (char *)NULL; |
ccc6cda3 JA |
7032 | } |
7033 | else | |
7034 | { | |
7035 | FREE (value); | |
7036 | } | |
7037 | /* Otherwise do nothing; just use the value in TEMP. */ | |
726f6388 | 7038 | } |
ccc6cda3 | 7039 | else /* VAR not set or VAR is NULL. */ |
28ef6c31 | 7040 | { |
ccc6cda3 JA |
7041 | FREE (temp); |
7042 | temp = (char *)NULL; | |
7043 | if (c == '=' && var_is_special) | |
7044 | { | |
b80f6443 | 7045 | report_error (_("$%s: cannot assign in this way"), name); |
ccc6cda3 JA |
7046 | free (name); |
7047 | free (value); | |
95732b49 | 7048 | return &expand_wdesc_error; |
ccc6cda3 JA |
7049 | } |
7050 | else if (c == '?') | |
7051 | { | |
7052 | parameter_brace_expand_error (name, value); | |
95732b49 | 7053 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
ccc6cda3 JA |
7054 | } |
7055 | else if (c != '+') | |
28ef6c31 JA |
7056 | { |
7057 | /* XXX -- if we're double-quoted and the named variable is "$@", | |
7058 | we want to turn off any special handling of "$@" -- | |
7059 | we're not using it, so whatever is on the rhs applies. */ | |
7060 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7061 | *quoted_dollar_atp = 0; | |
7062 | if (contains_dollar_at) | |
7063 | *contains_dollar_at = 0; | |
7064 | ||
95732b49 JA |
7065 | ret = parameter_brace_expand_rhs (name, value, c, quoted, |
7066 | quoted_dollar_atp, | |
7067 | contains_dollar_at); | |
7068 | /* XXX - fix up later, esp. noting presence of | |
7069 | W_HASQUOTEDNULL in tdesc->flags */ | |
28ef6c31 | 7070 | } |
ccc6cda3 | 7071 | free (value); |
726f6388 | 7072 | } |
28ef6c31 | 7073 | |
ccc6cda3 | 7074 | break; |
726f6388 | 7075 | } |
ccc6cda3 | 7076 | free (name); |
95732b49 JA |
7077 | |
7078 | if (ret == 0) | |
7079 | { | |
7080 | ret = alloc_word_desc (); | |
7081 | ret->flags = tflag; | |
7082 | ret->word = temp; | |
7083 | } | |
7084 | return (ret); | |
726f6388 JA |
7085 | } |
7086 | ||
cce855bc JA |
7087 | /* Expand a single ${xxx} expansion. The braces are optional. When |
7088 | the braces are used, parameter_brace_expand() does the work, | |
7089 | possibly calling param_expand recursively. */ | |
95732b49 | 7090 | static WORD_DESC * |
cce855bc JA |
7091 | param_expand (string, sindex, quoted, expanded_something, |
7092 | contains_dollar_at, quoted_dollar_at_p, had_quoted_null_p, | |
7093 | pflags) | |
7094 | char *string; | |
7095 | int *sindex, quoted, *expanded_something, *contains_dollar_at; | |
7096 | int *quoted_dollar_at_p, *had_quoted_null_p, pflags; | |
7097 | { | |
7117c2d2 | 7098 | char *temp, *temp1, uerror[3]; |
f73dda09 JA |
7099 | int zindex, t_index, expok; |
7100 | unsigned char c; | |
7117c2d2 | 7101 | intmax_t number; |
cce855bc | 7102 | SHELL_VAR *var; |
f73dda09 | 7103 | WORD_LIST *list; |
95732b49 JA |
7104 | WORD_DESC *tdesc, *ret; |
7105 | int tflag; | |
cce855bc JA |
7106 | |
7107 | zindex = *sindex; | |
7108 | c = string[++zindex]; | |
7109 | ||
7110 | temp = (char *)NULL; | |
95732b49 JA |
7111 | ret = tdesc = (WORD_DESC *)NULL; |
7112 | tflag = 0; | |
cce855bc JA |
7113 | |
7114 | /* Do simple cases first. Switch on what follows '$'. */ | |
7115 | switch (c) | |
7116 | { | |
7117 | /* $0 .. $9? */ | |
7118 | case '0': | |
7119 | case '1': | |
7120 | case '2': | |
7121 | case '3': | |
7122 | case '4': | |
7123 | case '5': | |
7124 | case '6': | |
7125 | case '7': | |
7126 | case '8': | |
7127 | case '9': | |
f73dda09 | 7128 | temp1 = dollar_vars[TODIGIT (c)]; |
cce855bc JA |
7129 | if (unbound_vars_is_error && temp1 == (char *)NULL) |
7130 | { | |
7117c2d2 JA |
7131 | uerror[0] = '$'; |
7132 | uerror[1] = c; | |
7133 | uerror[2] = '\0'; | |
cce855bc | 7134 | last_command_exit_value = EXECUTION_FAILURE; |
0001803f | 7135 | err_unboundvar (uerror); |
95732b49 | 7136 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc | 7137 | } |
b80f6443 JA |
7138 | if (temp1) |
7139 | temp = (*temp1 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7140 | ? quote_string (temp1) | |
7141 | : quote_escapes (temp1); | |
7142 | else | |
7143 | temp = (char *)NULL; | |
95732b49 | 7144 | |
cce855bc JA |
7145 | break; |
7146 | ||
7147 | /* $$ -- pid of the invoking shell. */ | |
7148 | case '$': | |
7149 | temp = itos (dollar_dollar_pid); | |
7150 | break; | |
7151 | ||
7152 | /* $# -- number of positional parameters. */ | |
7153 | case '#': | |
7154 | temp = itos (number_of_args ()); | |
7155 | break; | |
7156 | ||
7157 | /* $? -- return value of the last synchronous command. */ | |
7158 | case '?': | |
7159 | temp = itos (last_command_exit_value); | |
7160 | break; | |
7161 | ||
7162 | /* $- -- flags supplied to the shell on invocation or by `set'. */ | |
7163 | case '-': | |
7164 | temp = which_set_flags (); | |
7165 | break; | |
7166 | ||
7167 | /* $! -- Pid of the last asynchronous command. */ | |
7168 | case '!': | |
7169 | /* If no asynchronous pids have been created, expand to nothing. | |
7170 | If `set -u' has been executed, and no async processes have | |
7171 | been created, this is an expansion error. */ | |
7172 | if (last_asynchronous_pid == NO_PID) | |
7173 | { | |
7174 | if (expanded_something) | |
7175 | *expanded_something = 0; | |
7176 | temp = (char *)NULL; | |
7177 | if (unbound_vars_is_error) | |
7178 | { | |
7117c2d2 JA |
7179 | uerror[0] = '$'; |
7180 | uerror[1] = c; | |
7181 | uerror[2] = '\0'; | |
cce855bc | 7182 | last_command_exit_value = EXECUTION_FAILURE; |
0001803f | 7183 | err_unboundvar (uerror); |
95732b49 | 7184 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc JA |
7185 | } |
7186 | } | |
7187 | else | |
f73dda09 | 7188 | temp = itos (last_asynchronous_pid); |
cce855bc JA |
7189 | break; |
7190 | ||
7191 | /* The only difference between this and $@ is when the arg is quoted. */ | |
7192 | case '*': /* `$*' */ | |
7193 | list = list_rest_of_args (); | |
7194 | ||
89a92869 CR |
7195 | #if 0 |
7196 | /* According to austin-group posix proposal by Geoff Clare in | |
7197 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7198 | ||
7199 | "The shell shall write a message to standard error and | |
7200 | immediately exit when it tries to expand an unset parameter | |
7201 | other than the '@' and '*' special parameters." | |
7202 | */ | |
7203 | ||
7204 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) | |
3185942a JA |
7205 | { |
7206 | uerror[0] = '$'; | |
7207 | uerror[1] = '*'; | |
7208 | uerror[2] = '\0'; | |
3185942a | 7209 | last_command_exit_value = EXECUTION_FAILURE; |
89a92869 | 7210 | err_unboundvar (uerror); |
3185942a JA |
7211 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7212 | } | |
89a92869 | 7213 | #endif |
3185942a | 7214 | |
cce855bc JA |
7215 | /* If there are no command-line arguments, this should just |
7216 | disappear if there are other characters in the expansion, | |
7217 | even if it's quoted. */ | |
7218 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && list == 0) | |
7219 | temp = (char *)NULL; | |
0001803f | 7220 | else if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
cce855bc JA |
7221 | { |
7222 | /* If we have "$*" we want to make a string of the positional | |
7223 | parameters, separated by the first character of $IFS, and | |
7224 | quote the whole string, including the separators. If IFS | |
7225 | is unset, the parameters are separated by ' '; if $IFS is | |
7226 | null, the parameters are concatenated. */ | |
0001803f | 7227 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_PATQUOTE)) ? string_list_dollar_star (list) : string_list (list); |
cce855bc | 7228 | temp1 = quote_string (temp); |
95732b49 JA |
7229 | if (*temp == 0) |
7230 | tflag |= W_HASQUOTEDNULL; | |
cce855bc JA |
7231 | free (temp); |
7232 | temp = temp1; | |
7233 | } | |
7234 | else | |
28ef6c31 | 7235 | { |
95732b49 JA |
7236 | /* We check whether or not we're eventually going to split $* here, |
7237 | for example when IFS is empty and we are processing the rhs of | |
7238 | an assignment statement. In that case, we don't separate the | |
7239 | arguments at all. Otherwise, if the $* is not quoted it is | |
7240 | identical to $@ */ | |
7241 | #if 1 | |
7242 | # if defined (HANDLE_MULTIBYTE) | |
7243 | if (expand_no_split_dollar_star && ifs_firstc[0] == 0) | |
7244 | # else | |
7245 | if (expand_no_split_dollar_star && ifs_firstc == 0) | |
7246 | # endif | |
7247 | temp = string_list_dollar_star (list); | |
7248 | else | |
7249 | temp = string_list_dollar_at (list, quoted); | |
7250 | #else | |
28ef6c31 | 7251 | temp = string_list_dollar_at (list, quoted); |
95732b49 | 7252 | #endif |
28ef6c31 JA |
7253 | if (expand_no_split_dollar_star == 0 && contains_dollar_at) |
7254 | *contains_dollar_at = 1; | |
7255 | } | |
cce855bc JA |
7256 | |
7257 | dispose_words (list); | |
7258 | break; | |
7259 | ||
7260 | /* When we have "$@" what we want is "$1" "$2" "$3" ... This | |
7261 | means that we have to turn quoting off after we split into | |
7262 | the individually quoted arguments so that the final split | |
7263 | on the first character of $IFS is still done. */ | |
7264 | case '@': /* `$@' */ | |
7265 | list = list_rest_of_args (); | |
7266 | ||
89a92869 CR |
7267 | #if 0 |
7268 | /* According to austin-group posix proposal by Geoff Clare in | |
7269 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7270 | ||
7271 | "The shell shall write a message to standard error and | |
7272 | immediately exit when it tries to expand an unset parameter | |
7273 | other than the '@' and '*' special parameters." | |
7274 | */ | |
7275 | ||
7276 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) | |
3185942a JA |
7277 | { |
7278 | uerror[0] = '$'; | |
7279 | uerror[1] = '@'; | |
7280 | uerror[2] = '\0'; | |
3185942a | 7281 | last_command_exit_value = EXECUTION_FAILURE; |
89a92869 | 7282 | err_unboundvar (uerror); |
3185942a JA |
7283 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7284 | } | |
89a92869 | 7285 | #endif |
3185942a | 7286 | |
cce855bc JA |
7287 | /* We want to flag the fact that we saw this. We can't turn |
7288 | off quoting entirely, because other characters in the | |
7289 | string might need it (consider "\"$@\""), but we need some | |
7290 | way to signal that the final split on the first character | |
7291 | of $IFS should be done, even though QUOTED is 1. */ | |
0001803f | 7292 | /* XXX - should this test include Q_PATQUOTE? */ |
cce855bc JA |
7293 | if (quoted_dollar_at_p && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7294 | *quoted_dollar_at_p = 1; | |
7295 | if (contains_dollar_at) | |
7296 | *contains_dollar_at = 1; | |
7297 | ||
0001803f CR |
7298 | #if 0 |
7299 | if (pflags & PF_NOSPLIT2) | |
7300 | temp = string_list_internal (quoted ? quote_list (list) : list, " "); | |
7301 | else | |
7302 | #endif | |
cce855bc JA |
7303 | /* We want to separate the positional parameters with the first |
7304 | character of $IFS in case $IFS is something other than a space. | |
7305 | We also want to make sure that splitting is done no matter what -- | |
7306 | according to POSIX.2, this expands to a list of the positional | |
7307 | parameters no matter what IFS is set to. */ | |
7308 | temp = string_list_dollar_at (list, quoted); | |
7309 | ||
7310 | dispose_words (list); | |
7311 | break; | |
7312 | ||
7313 | case LBRACE: | |
0001803f | 7314 | tdesc = parameter_brace_expand (string, &zindex, quoted, pflags, |
95732b49 JA |
7315 | quoted_dollar_at_p, |
7316 | contains_dollar_at); | |
7317 | ||
95732b49 JA |
7318 | if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal) |
7319 | return (tdesc); | |
7320 | temp = tdesc ? tdesc->word : (char *)0; | |
cce855bc JA |
7321 | |
7322 | /* XXX */ | |
bb70624e | 7323 | /* Quoted nulls should be removed if there is anything else |
cce855bc JA |
7324 | in the string. */ |
7325 | /* Note that we saw the quoted null so we can add one back at | |
7326 | the end of this function if there are no other characters | |
28ef6c31 JA |
7327 | in the string, discard TEMP, and go on. The exception to |
7328 | this is when we have "${@}" and $1 is '', since $@ needs | |
7329 | special handling. */ | |
95732b49 | 7330 | if (tdesc && tdesc->word && (tdesc->flags & W_HASQUOTEDNULL) && QUOTED_NULL (temp)) |
cce855bc JA |
7331 | { |
7332 | if (had_quoted_null_p) | |
7333 | *had_quoted_null_p = 1; | |
28ef6c31 JA |
7334 | if (*quoted_dollar_at_p == 0) |
7335 | { | |
7336 | free (temp); | |
95732b49 | 7337 | tdesc->word = temp = (char *)NULL; |
28ef6c31 JA |
7338 | } |
7339 | ||
cce855bc JA |
7340 | } |
7341 | ||
95732b49 | 7342 | ret = tdesc; |
cce855bc JA |
7343 | goto return0; |
7344 | ||
7345 | /* Do command or arithmetic substitution. */ | |
7346 | case LPAREN: | |
7347 | /* We have to extract the contents of this paren substitution. */ | |
7348 | t_index = zindex + 1; | |
3185942a | 7349 | temp = extract_command_subst (string, &t_index, 0); |
cce855bc JA |
7350 | zindex = t_index; |
7351 | ||
7352 | /* For Posix.2-style `$(( ))' arithmetic substitution, | |
28ef6c31 | 7353 | extract the expression and pass it to the evaluator. */ |
cce855bc JA |
7354 | if (temp && *temp == LPAREN) |
7355 | { | |
7356 | char *temp2; | |
7357 | temp1 = temp + 1; | |
7358 | temp2 = savestring (temp1); | |
7359 | t_index = strlen (temp2) - 1; | |
7360 | ||
7361 | if (temp2[t_index] != RPAREN) | |
7362 | { | |
7363 | free (temp2); | |
7364 | goto comsub; | |
7365 | } | |
7366 | ||
7367 | /* Cut off ending `)' */ | |
7368 | temp2[t_index] = '\0'; | |
7369 | ||
0628567a JA |
7370 | if (chk_arithsub (temp2, t_index) == 0) |
7371 | { | |
7372 | free (temp2); | |
0001803f CR |
7373 | #if 0 |
7374 | internal_warning (_("future versions of the shell will force evaluation as an arithmetic substitution")); | |
7375 | #endif | |
0628567a JA |
7376 | goto comsub; |
7377 | } | |
7378 | ||
cce855bc | 7379 | /* Expand variables found inside the expression. */ |
0628567a | 7380 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
cce855bc JA |
7381 | free (temp2); |
7382 | ||
7383 | arithsub: | |
7384 | /* No error messages. */ | |
7385 | this_command_name = (char *)NULL; | |
7386 | number = evalexp (temp1, &expok); | |
7387 | free (temp); | |
7388 | free (temp1); | |
7389 | if (expok == 0) | |
7390 | { | |
7391 | if (interactive_shell == 0 && posixly_correct) | |
7392 | { | |
7393 | last_command_exit_value = EXECUTION_FAILURE; | |
95732b49 | 7394 | return (&expand_wdesc_fatal); |
cce855bc JA |
7395 | } |
7396 | else | |
95732b49 | 7397 | return (&expand_wdesc_error); |
cce855bc JA |
7398 | } |
7399 | temp = itos (number); | |
7400 | break; | |
7401 | } | |
7402 | ||
7403 | comsub: | |
b80f6443 JA |
7404 | if (pflags & PF_NOCOMSUB) |
7405 | /* we need zindex+1 because string[zindex] == RPAREN */ | |
7406 | temp1 = substring (string, *sindex, zindex+1); | |
7407 | else | |
3185942a JA |
7408 | { |
7409 | tdesc = command_substitute (temp, quoted); | |
7410 | temp1 = tdesc ? tdesc->word : (char *)NULL; | |
7411 | if (tdesc) | |
7412 | dispose_word_desc (tdesc); | |
7413 | } | |
cce855bc JA |
7414 | FREE (temp); |
7415 | temp = temp1; | |
7416 | break; | |
7417 | ||
7418 | /* Do POSIX.2d9-style arithmetic substitution. This will probably go | |
7419 | away in a future bash release. */ | |
7420 | case '[': | |
bb70624e | 7421 | /* Extract the contents of this arithmetic substitution. */ |
cce855bc JA |
7422 | t_index = zindex + 1; |
7423 | temp = extract_arithmetic_subst (string, &t_index); | |
7424 | zindex = t_index; | |
3185942a JA |
7425 | if (temp == 0) |
7426 | { | |
7427 | temp = savestring (string); | |
7428 | if (expanded_something) | |
7429 | *expanded_something = 0; | |
7430 | goto return0; | |
7431 | } | |
cce855bc JA |
7432 | |
7433 | /* Do initial variable expansion. */ | |
0628567a | 7434 | temp1 = expand_arith_string (temp, Q_DOUBLE_QUOTES); |
cce855bc JA |
7435 | |
7436 | goto arithsub; | |
7437 | ||
7438 | default: | |
7439 | /* Find the variable in VARIABLE_LIST. */ | |
7440 | temp = (char *)NULL; | |
7441 | ||
7442 | for (t_index = zindex; (c = string[zindex]) && legal_variable_char (c); zindex++) | |
7443 | ; | |
7444 | temp1 = (zindex > t_index) ? substring (string, t_index, zindex) : (char *)NULL; | |
7445 | ||
7446 | /* If this isn't a variable name, then just output the `$'. */ | |
7447 | if (temp1 == 0 || *temp1 == '\0') | |
7448 | { | |
7449 | FREE (temp1); | |
f73dda09 | 7450 | temp = (char *)xmalloc (2); |
cce855bc JA |
7451 | temp[0] = '$'; |
7452 | temp[1] = '\0'; | |
7453 | if (expanded_something) | |
7454 | *expanded_something = 0; | |
7455 | goto return0; | |
7456 | } | |
7457 | ||
7458 | /* If the variable exists, return its value cell. */ | |
7459 | var = find_variable (temp1); | |
7460 | ||
7117c2d2 | 7461 | if (var && invisible_p (var) == 0 && var_isset (var)) |
cce855bc JA |
7462 | { |
7463 | #if defined (ARRAY_VARS) | |
3185942a | 7464 | if (assoc_p (var) || array_p (var)) |
cce855bc | 7465 | { |
3185942a JA |
7466 | temp = array_p (var) ? array_reference (array_cell (var), 0) |
7467 | : assoc_reference (assoc_cell (var), "0"); | |
cce855bc | 7468 | if (temp) |
b80f6443 JA |
7469 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7470 | ? quote_string (temp) | |
7471 | : quote_escapes (temp); | |
7472 | else if (unbound_vars_is_error) | |
7473 | goto unbound_variable; | |
cce855bc JA |
7474 | } |
7475 | else | |
7476 | #endif | |
b80f6443 JA |
7477 | { |
7478 | temp = value_cell (var); | |
7479 | ||
7480 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7481 | ? quote_string (temp) | |
7482 | : quote_escapes (temp); | |
7483 | } | |
7484 | ||
cce855bc | 7485 | free (temp1); |
7117c2d2 | 7486 | |
cce855bc JA |
7487 | goto return0; |
7488 | } | |
7489 | ||
7490 | temp = (char *)NULL; | |
7491 | ||
b80f6443 | 7492 | unbound_variable: |
cce855bc | 7493 | if (unbound_vars_is_error) |
0001803f CR |
7494 | { |
7495 | last_command_exit_value = EXECUTION_FAILURE; | |
7496 | err_unboundvar (temp1); | |
7497 | } | |
cce855bc JA |
7498 | else |
7499 | { | |
7500 | free (temp1); | |
7501 | goto return0; | |
7502 | } | |
7503 | ||
7504 | free (temp1); | |
7505 | last_command_exit_value = EXECUTION_FAILURE; | |
7506 | return ((unbound_vars_is_error && interactive_shell == 0) | |
95732b49 JA |
7507 | ? &expand_wdesc_fatal |
7508 | : &expand_wdesc_error); | |
cce855bc JA |
7509 | } |
7510 | ||
7511 | if (string[zindex]) | |
7512 | zindex++; | |
7513 | ||
7514 | return0: | |
7515 | *sindex = zindex; | |
95732b49 JA |
7516 | |
7517 | if (ret == 0) | |
7518 | { | |
7519 | ret = alloc_word_desc (); | |
7520 | ret->flags = tflag; /* XXX */ | |
7521 | ret->word = temp; | |
7522 | } | |
7523 | return ret; | |
cce855bc JA |
7524 | } |
7525 | ||
7526 | /* Make a word list which is the result of parameter and variable | |
7527 | expansion, command substitution, arithmetic substitution, and | |
7528 | quote removal of WORD. Return a pointer to a WORD_LIST which is | |
7529 | the result of the expansion. If WORD contains a null word, the | |
7530 | word list returned is also null. | |
726f6388 | 7531 | |
ccc6cda3 JA |
7532 | QUOTED contains flag values defined in shell.h. |
7533 | ||
b72432fd JA |
7534 | ISEXP is used to tell expand_word_internal that the word should be |
7535 | treated as the result of an expansion. This has implications for | |
7536 | how IFS characters in the word are treated. | |
7537 | ||
726f6388 JA |
7538 | CONTAINS_DOLLAR_AT and EXPANDED_SOMETHING are return values; when non-null |
7539 | they point to an integer value which receives information about expansion. | |
7540 | CONTAINS_DOLLAR_AT gets non-zero if WORD contained "$@", else zero. | |
7541 | EXPANDED_SOMETHING get non-zero if WORD contained any parameter expansions, | |
7542 | else zero. | |
7543 | ||
7544 | This only does word splitting in the case of $@ expansion. In that | |
7545 | case, we split on ' '. */ | |
7546 | ||
7547 | /* Values for the local variable quoted_state. */ | |
7548 | #define UNQUOTED 0 | |
7549 | #define PARTIALLY_QUOTED 1 | |
7550 | #define WHOLLY_QUOTED 2 | |
7551 | ||
7552 | static WORD_LIST * | |
b72432fd | 7553 | expand_word_internal (word, quoted, isexp, contains_dollar_at, expanded_something) |
726f6388 | 7554 | WORD_DESC *word; |
b72432fd | 7555 | int quoted, isexp; |
726f6388 JA |
7556 | int *contains_dollar_at; |
7557 | int *expanded_something; | |
7558 | { | |
ccc6cda3 JA |
7559 | WORD_LIST *list; |
7560 | WORD_DESC *tword; | |
726f6388 JA |
7561 | |
7562 | /* The intermediate string that we build while expanding. */ | |
ccc6cda3 | 7563 | char *istring; |
726f6388 JA |
7564 | |
7565 | /* The current size of the above object. */ | |
ccc6cda3 | 7566 | int istring_size; |
726f6388 JA |
7567 | |
7568 | /* Index into ISTRING. */ | |
ccc6cda3 | 7569 | int istring_index; |
726f6388 JA |
7570 | |
7571 | /* Temporary string storage. */ | |
ccc6cda3 | 7572 | char *temp, *temp1; |
726f6388 JA |
7573 | |
7574 | /* The text of WORD. */ | |
ccc6cda3 | 7575 | register char *string; |
726f6388 | 7576 | |
7117c2d2 JA |
7577 | /* The size of STRING. */ |
7578 | size_t string_size; | |
7579 | ||
726f6388 | 7580 | /* The index into STRING. */ |
ccc6cda3 | 7581 | int sindex; |
726f6388 JA |
7582 | |
7583 | /* This gets 1 if we see a $@ while quoted. */ | |
ccc6cda3 | 7584 | int quoted_dollar_at; |
726f6388 JA |
7585 | |
7586 | /* One of UNQUOTED, PARTIALLY_QUOTED, or WHOLLY_QUOTED, depending on | |
7587 | whether WORD contains no quoting characters, a partially quoted | |
7588 | string (e.g., "xx"ab), or is fully quoted (e.g., "xxab"). */ | |
ccc6cda3 JA |
7589 | int quoted_state; |
7590 | ||
95732b49 | 7591 | /* State flags */ |
ccc6cda3 | 7592 | int had_quoted_null; |
cce855bc | 7593 | int has_dollar_at; |
28ef6c31 | 7594 | int tflag; |
0001803f | 7595 | int pflags; /* flags passed to param_expand */ |
726f6388 | 7596 | |
95732b49 JA |
7597 | int assignoff; /* If assignment, offset of `=' */ |
7598 | ||
f73dda09 | 7599 | register unsigned char c; /* Current character. */ |
726f6388 | 7600 | int t_index; /* For calls to string_extract_xxx. */ |
726f6388 | 7601 | |
bb70624e | 7602 | char twochars[2]; |
b72432fd | 7603 | |
7117c2d2 JA |
7604 | DECLARE_MBSTATE; |
7605 | ||
f73dda09 | 7606 | istring = (char *)xmalloc (istring_size = DEFAULT_INITIAL_ARRAY_SIZE); |
ccc6cda3 | 7607 | istring[istring_index = 0] = '\0'; |
cce855bc | 7608 | quoted_dollar_at = had_quoted_null = has_dollar_at = 0; |
ccc6cda3 JA |
7609 | quoted_state = UNQUOTED; |
7610 | ||
7611 | string = word->word; | |
7612 | if (string == 0) | |
7613 | goto finished_with_string; | |
95732b49 JA |
7614 | /* Don't need the string length for the SADD... and COPY_ macros unless |
7615 | multibyte characters are possible. */ | |
7616 | string_size = (MB_CUR_MAX > 1) ? strlen (string) : 1; | |
726f6388 JA |
7617 | |
7618 | if (contains_dollar_at) | |
7619 | *contains_dollar_at = 0; | |
7620 | ||
95732b49 JA |
7621 | assignoff = -1; |
7622 | ||
726f6388 JA |
7623 | /* Begin the expansion. */ |
7624 | ||
ccc6cda3 | 7625 | for (sindex = 0; ;) |
726f6388 JA |
7626 | { |
7627 | c = string[sindex]; | |
7628 | ||
7629 | /* Case on toplevel character. */ | |
7630 | switch (c) | |
7631 | { | |
7632 | case '\0': | |
7633 | goto finished_with_string; | |
7634 | ||
7635 | case CTLESC: | |
7117c2d2 JA |
7636 | sindex++; |
7637 | #if HANDLE_MULTIBYTE | |
7638 | if (MB_CUR_MAX > 1 && string[sindex]) | |
7639 | { | |
b80f6443 | 7640 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
7641 | } |
7642 | else | |
7643 | #endif | |
7644 | { | |
7645 | temp = (char *)xmalloc (3); | |
7646 | temp[0] = CTLESC; | |
7647 | temp[1] = c = string[sindex]; | |
7648 | temp[2] = '\0'; | |
7649 | } | |
726f6388 | 7650 | |
cce855bc | 7651 | dollar_add_string: |
726f6388 JA |
7652 | if (string[sindex]) |
7653 | sindex++; | |
7654 | ||
cce855bc JA |
7655 | add_string: |
7656 | if (temp) | |
7657 | { | |
7658 | istring = sub_append_string (temp, istring, &istring_index, &istring_size); | |
7659 | temp = (char *)0; | |
7660 | } | |
7661 | ||
7662 | break; | |
726f6388 JA |
7663 | |
7664 | #if defined (PROCESS_SUBSTITUTION) | |
7665 | /* Process substitution. */ | |
7666 | case '<': | |
7667 | case '>': | |
7668 | { | |
0628567a | 7669 | if (string[++sindex] != LPAREN || (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (word->flags & (W_DQUOTE|W_NOPROCSUB)) || posixly_correct) |
726f6388 | 7670 | { |
bb70624e | 7671 | sindex--; /* add_character: label increments sindex */ |
726f6388 JA |
7672 | goto add_character; |
7673 | } | |
7674 | else | |
cce855bc | 7675 | t_index = sindex + 1; /* skip past both '<' and LPAREN */ |
726f6388 | 7676 | |
cce855bc | 7677 | temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index); /*))*/ |
ccc6cda3 | 7678 | sindex = t_index; |
726f6388 JA |
7679 | |
7680 | /* If the process substitution specification is `<()', we want to | |
7681 | open the pipe for writing in the child and produce output; if | |
7682 | it is `>()', we want to open the pipe for reading in the child | |
7683 | and consume input. */ | |
ccc6cda3 | 7684 | temp = temp1 ? process_substitute (temp1, (c == '>')) : (char *)0; |
726f6388 JA |
7685 | |
7686 | FREE (temp1); | |
7687 | ||
7688 | goto dollar_add_string; | |
7689 | } | |
7690 | #endif /* PROCESS_SUBSTITUTION */ | |
7691 | ||
95732b49 JA |
7692 | case '=': |
7693 | /* Posix.2 section 3.6.1 says that tildes following `=' in words | |
7694 | which are not assignment statements are not expanded. If the | |
7695 | shell isn't in posix mode, though, we perform tilde expansion | |
7696 | on `likely candidate' unquoted assignment statements (flags | |
7697 | include W_ASSIGNMENT but not W_QUOTED). A likely candidate | |
7698 | contains an unquoted :~ or =~. Something to think about: we | |
7699 | now have a flag that says to perform tilde expansion on arguments | |
7700 | to `assignment builtins' like declare and export that look like | |
7701 | assignment statements. We now do tilde expansion on such words | |
7702 | even in POSIX mode. */ | |
7703 | if (word->flags & (W_ASSIGNRHS|W_NOTILDE)) | |
17345e5a | 7704 | { |
0001803f | 7705 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
7706 | goto add_ifs_character; |
7707 | else | |
7708 | goto add_character; | |
7709 | } | |
95732b49 JA |
7710 | /* If we're not in posix mode or forcing assignment-statement tilde |
7711 | expansion, note where the `=' appears in the word and prepare to | |
7712 | do tilde expansion following the first `='. */ | |
7713 | if ((word->flags & W_ASSIGNMENT) && | |
7714 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
7715 | assignoff == -1 && sindex > 0) | |
7716 | assignoff = sindex; | |
7717 | if (sindex == assignoff && string[sindex+1] == '~') /* XXX */ | |
7718 | word->flags |= W_ITILDE; | |
7719 | #if 0 | |
7720 | else if ((word->flags & W_ASSIGNMENT) && | |
7721 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
7722 | string[sindex+1] == '~') | |
7723 | word->flags |= W_ITILDE; | |
7724 | #endif | |
0001803f | 7725 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
7726 | goto add_ifs_character; |
7727 | else | |
7728 | goto add_character; | |
95732b49 JA |
7729 | |
7730 | case ':': | |
7731 | if (word->flags & W_NOTILDE) | |
17345e5a | 7732 | { |
0001803f | 7733 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
7734 | goto add_ifs_character; |
7735 | else | |
7736 | goto add_character; | |
7737 | } | |
95732b49 JA |
7738 | |
7739 | if ((word->flags & (W_ASSIGNMENT|W_ASSIGNRHS|W_TILDEEXP)) && | |
7740 | string[sindex+1] == '~') | |
7741 | word->flags |= W_ITILDE; | |
17345e5a | 7742 | |
0001803f | 7743 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
7744 | goto add_ifs_character; |
7745 | else | |
7746 | goto add_character; | |
95732b49 JA |
7747 | |
7748 | case '~': | |
7749 | /* If the word isn't supposed to be tilde expanded, or we're not | |
7750 | at the start of a word or after an unquoted : or = in an | |
7751 | assignment statement, we don't do tilde expansion. */ | |
7752 | if ((word->flags & (W_NOTILDE|W_DQUOTE)) || | |
7753 | (sindex > 0 && ((word->flags & W_ITILDE) == 0)) || | |
7754 | (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
7755 | { | |
7756 | word->flags &= ~W_ITILDE; | |
0001803f | 7757 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) |
17345e5a JA |
7758 | goto add_ifs_character; |
7759 | else | |
7760 | goto add_character; | |
95732b49 JA |
7761 | } |
7762 | ||
7763 | if (word->flags & W_ASSIGNRHS) | |
7764 | tflag = 2; | |
7765 | else if (word->flags & (W_ASSIGNMENT|W_TILDEEXP)) | |
7766 | tflag = 1; | |
7767 | else | |
7768 | tflag = 0; | |
7769 | ||
7770 | temp = bash_tilde_find_word (string + sindex, tflag, &t_index); | |
7771 | ||
7772 | word->flags &= ~W_ITILDE; | |
7773 | ||
7774 | if (temp && *temp && t_index > 0) | |
7775 | { | |
7776 | temp1 = bash_tilde_expand (temp, tflag); | |
0628567a JA |
7777 | if (temp1 && *temp1 == '~' && STREQ (temp, temp1)) |
7778 | { | |
7779 | FREE (temp); | |
7780 | FREE (temp1); | |
7781 | goto add_character; /* tilde expansion failed */ | |
7782 | } | |
95732b49 JA |
7783 | free (temp); |
7784 | temp = temp1; | |
7785 | sindex += t_index; | |
3185942a | 7786 | goto add_quoted_string; /* XXX was add_string */ |
95732b49 JA |
7787 | } |
7788 | else | |
7789 | { | |
7790 | FREE (temp); | |
7791 | goto add_character; | |
7792 | } | |
7793 | ||
726f6388 | 7794 | case '$': |
726f6388 JA |
7795 | if (expanded_something) |
7796 | *expanded_something = 1; | |
7797 | ||
cce855bc | 7798 | has_dollar_at = 0; |
0001803f CR |
7799 | pflags = (word->flags & W_NOCOMSUB) ? PF_NOCOMSUB : 0; |
7800 | if (word->flags & W_NOSPLIT2) | |
7801 | pflags |= PF_NOSPLIT2; | |
95732b49 | 7802 | tword = param_expand (string, &sindex, quoted, expanded_something, |
cce855bc | 7803 | &has_dollar_at, "ed_dollar_at, |
0001803f | 7804 | &had_quoted_null, pflags); |
726f6388 | 7805 | |
95732b49 | 7806 | if (tword == &expand_wdesc_error || tword == &expand_wdesc_fatal) |
726f6388 | 7807 | { |
cce855bc JA |
7808 | free (string); |
7809 | free (istring); | |
95732b49 JA |
7810 | return ((tword == &expand_wdesc_error) ? &expand_word_error |
7811 | : &expand_word_fatal); | |
cce855bc JA |
7812 | } |
7813 | if (contains_dollar_at && has_dollar_at) | |
7814 | *contains_dollar_at = 1; | |
95732b49 JA |
7815 | |
7816 | if (tword && (tword->flags & W_HASQUOTEDNULL)) | |
7817 | had_quoted_null = 1; | |
7818 | ||
7819 | temp = tword->word; | |
7820 | dispose_word_desc (tword); | |
7821 | ||
cce855bc JA |
7822 | goto add_string; |
7823 | break; | |
726f6388 | 7824 | |
cce855bc JA |
7825 | case '`': /* Backquoted command substitution. */ |
7826 | { | |
b80f6443 | 7827 | t_index = sindex++; |
726f6388 | 7828 | |
3185942a | 7829 | temp = string_extract (string, &sindex, "`", SX_REQMATCH); |
95732b49 JA |
7830 | /* The test of sindex against t_index is to allow bare instances of |
7831 | ` to pass through, for backwards compatibility. */ | |
7832 | if (temp == &extract_string_error || temp == &extract_string_fatal) | |
7833 | { | |
7834 | if (sindex - 1 == t_index) | |
7835 | { | |
7836 | sindex = t_index; | |
7837 | goto add_character; | |
7838 | } | |
3185942a | 7839 | report_error (_("bad substitution: no closing \"`\" in %s") , string+t_index); |
95732b49 JA |
7840 | free (string); |
7841 | free (istring); | |
7842 | return ((temp == &extract_string_error) ? &expand_word_error | |
7843 | : &expand_word_fatal); | |
7844 | } | |
7845 | ||
cce855bc JA |
7846 | if (expanded_something) |
7847 | *expanded_something = 1; | |
726f6388 | 7848 | |
b80f6443 JA |
7849 | if (word->flags & W_NOCOMSUB) |
7850 | /* sindex + 1 because string[sindex] == '`' */ | |
7851 | temp1 = substring (string, t_index, sindex + 1); | |
7852 | else | |
7853 | { | |
7854 | de_backslash (temp); | |
3185942a JA |
7855 | tword = command_substitute (temp, quoted); |
7856 | temp1 = tword ? tword->word : (char *)NULL; | |
7857 | if (tword) | |
7858 | dispose_word_desc (tword); | |
b80f6443 | 7859 | } |
cce855bc JA |
7860 | FREE (temp); |
7861 | temp = temp1; | |
7862 | goto dollar_add_string; | |
7863 | } | |
ccc6cda3 | 7864 | |
cce855bc JA |
7865 | case '\\': |
7866 | if (string[sindex + 1] == '\n') | |
7867 | { | |
7868 | sindex += 2; | |
7869 | continue; | |
7870 | } | |
726f6388 | 7871 | |
cce855bc | 7872 | c = string[++sindex]; |
726f6388 | 7873 | |
cce855bc | 7874 | if (quoted & Q_HERE_DOCUMENT) |
28ef6c31 | 7875 | tflag = CBSHDOC; |
cce855bc | 7876 | else if (quoted & Q_DOUBLE_QUOTES) |
28ef6c31 | 7877 | tflag = CBSDQUOTE; |
cce855bc | 7878 | else |
28ef6c31 JA |
7879 | tflag = 0; |
7880 | ||
28ef6c31 | 7881 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0)) |
cce855bc | 7882 | { |
7117c2d2 | 7883 | SCOPY_CHAR_I (twochars, '\\', c, string, sindex, string_size); |
bb70624e JA |
7884 | } |
7885 | else if (c == 0) | |
7886 | { | |
7887 | c = CTLNUL; | |
7888 | sindex--; /* add_character: label increments sindex */ | |
7889 | goto add_character; | |
cce855bc JA |
7890 | } |
7891 | else | |
bb70624e | 7892 | { |
7117c2d2 | 7893 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
bb70624e | 7894 | } |
726f6388 | 7895 | |
bb70624e JA |
7896 | sindex++; |
7897 | add_twochars: | |
7898 | /* BEFORE jumping here, we need to increment sindex if appropriate */ | |
7899 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, | |
7900 | DEFAULT_ARRAY_SIZE); | |
7901 | istring[istring_index++] = twochars[0]; | |
7902 | istring[istring_index++] = twochars[1]; | |
7903 | istring[istring_index] = '\0'; | |
7904 | ||
7905 | break; | |
726f6388 | 7906 | |
cce855bc | 7907 | case '"': |
7117c2d2 | 7908 | #if 0 |
95732b49 | 7909 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE)) |
7117c2d2 | 7910 | #else |
95732b49 | 7911 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
7117c2d2 | 7912 | #endif |
cce855bc | 7913 | goto add_character; |
ccc6cda3 JA |
7914 | |
7915 | t_index = ++sindex; | |
7916 | temp = string_extract_double_quoted (string, &sindex, 0); | |
7917 | ||
7918 | /* If the quotes surrounded the entire string, then the | |
7919 | whole word was quoted. */ | |
7920 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
7921 | ? WHOLLY_QUOTED | |
7117c2d2 | 7922 | : PARTIALLY_QUOTED; |
ccc6cda3 JA |
7923 | |
7924 | if (temp && *temp) | |
726f6388 | 7925 | { |
95732b49 JA |
7926 | tword = alloc_word_desc (); |
7927 | tword->word = temp; | |
7928 | ||
ccc6cda3 JA |
7929 | temp = (char *)NULL; |
7930 | ||
cce855bc | 7931 | has_dollar_at = 0; |
95732b49 | 7932 | /* Need to get W_HASQUOTEDNULL flag through this function. */ |
b72432fd | 7933 | list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &has_dollar_at, (int *)NULL); |
726f6388 | 7934 | |
ccc6cda3 JA |
7935 | if (list == &expand_word_error || list == &expand_word_fatal) |
7936 | { | |
7937 | free (istring); | |
7938 | free (string); | |
7939 | /* expand_word_internal has already freed temp_word->word | |
7940 | for us because of the way it prints error messages. */ | |
7941 | tword->word = (char *)NULL; | |
7942 | dispose_word (tword); | |
7943 | return list; | |
7944 | } | |
726f6388 | 7945 | |
ccc6cda3 | 7946 | dispose_word (tword); |
726f6388 | 7947 | |
ccc6cda3 JA |
7948 | /* "$@" (a double-quoted dollar-at) expands into nothing, |
7949 | not even a NULL word, when there are no positional | |
7950 | parameters. */ | |
cce855bc | 7951 | if (list == 0 && has_dollar_at) |
726f6388 | 7952 | { |
ccc6cda3 JA |
7953 | quoted_dollar_at++; |
7954 | break; | |
7955 | } | |
7956 | ||
7957 | /* If we get "$@", we know we have expanded something, so we | |
7958 | need to remember it for the final split on $IFS. This is | |
7959 | a special case; it's the only case where a quoted string | |
7960 | can expand into more than one word. It's going to come back | |
7961 | from the above call to expand_word_internal as a list with | |
7962 | a single word, in which all characters are quoted and | |
7963 | separated by blanks. What we want to do is to turn it back | |
7964 | into a list for the next piece of code. */ | |
7965 | if (list) | |
7966 | dequote_list (list); | |
7967 | ||
95732b49 JA |
7968 | if (list && list->word && (list->word->flags & W_HASQUOTEDNULL)) |
7969 | had_quoted_null = 1; | |
7970 | ||
cce855bc | 7971 | if (has_dollar_at) |
ccc6cda3 JA |
7972 | { |
7973 | quoted_dollar_at++; | |
7974 | if (contains_dollar_at) | |
7975 | *contains_dollar_at = 1; | |
7976 | if (expanded_something) | |
7977 | *expanded_something = 1; | |
7978 | } | |
7979 | } | |
7980 | else | |
7981 | { | |
7982 | /* What we have is "". This is a minor optimization. */ | |
f73dda09 | 7983 | FREE (temp); |
ccc6cda3 JA |
7984 | list = (WORD_LIST *)NULL; |
7985 | } | |
7986 | ||
7987 | /* The code above *might* return a list (consider the case of "$@", | |
7988 | where it returns "$1", "$2", etc.). We can't throw away the | |
7989 | rest of the list, and we have to make sure each word gets added | |
7990 | as quoted. We test on tresult->next: if it is non-NULL, we | |
7991 | quote the whole list, save it to a string with string_list, and | |
7992 | add that string. We don't need to quote the results of this | |
7993 | (and it would be wrong, since that would quote the separators | |
7994 | as well), so we go directly to add_string. */ | |
7995 | if (list) | |
7996 | { | |
7997 | if (list->next) | |
7998 | { | |
0001803f CR |
7999 | #if 0 |
8000 | if (quoted_dollar_at && word->flags & W_NOSPLIT2) | |
8001 | temp = string_list_internal (quote_list (list), " "); | |
8002 | else | |
8003 | #endif | |
bc4cd23c JA |
8004 | /* Testing quoted_dollar_at makes sure that "$@" is |
8005 | split correctly when $IFS does not contain a space. */ | |
8006 | temp = quoted_dollar_at | |
8007 | ? string_list_dollar_at (list, Q_DOUBLE_QUOTES) | |
8008 | : string_list (quote_list (list)); | |
ccc6cda3 | 8009 | dispose_words (list); |
726f6388 JA |
8010 | goto add_string; |
8011 | } | |
8012 | else | |
8013 | { | |
ccc6cda3 | 8014 | temp = savestring (list->word->word); |
95732b49 | 8015 | tflag = list->word->flags; |
ccc6cda3 | 8016 | dispose_words (list); |
95732b49 | 8017 | |
cce855bc JA |
8018 | /* If the string is not a quoted null string, we want |
8019 | to remove any embedded unquoted CTLNUL characters. | |
8020 | We do not want to turn quoted null strings back into | |
8021 | the empty string, though. We do this because we | |
8022 | want to remove any quoted nulls from expansions that | |
8023 | contain other characters. For example, if we have | |
8024 | x"$*"y or "x$*y" and there are no positional parameters, | |
7117c2d2 | 8025 | the $* should expand into nothing. */ |
95732b49 JA |
8026 | /* We use the W_HASQUOTEDNULL flag to differentiate the |
8027 | cases: a quoted null character as above and when | |
8028 | CTLNUL is contained in the (non-null) expansion | |
8029 | of some variable. We use the had_quoted_null flag to | |
8030 | pass the value through this function to its caller. */ | |
8031 | if ((tflag & W_HASQUOTEDNULL) && QUOTED_NULL (temp) == 0) | |
cce855bc | 8032 | remove_quoted_nulls (temp); /* XXX */ |
726f6388 JA |
8033 | } |
8034 | } | |
ccc6cda3 JA |
8035 | else |
8036 | temp = (char *)NULL; | |
726f6388 | 8037 | |
ccc6cda3 JA |
8038 | /* We do not want to add quoted nulls to strings that are only |
8039 | partially quoted; we can throw them away. */ | |
8040 | if (temp == 0 && quoted_state == PARTIALLY_QUOTED) | |
cce855bc | 8041 | continue; |
726f6388 | 8042 | |
ccc6cda3 | 8043 | add_quoted_string: |
726f6388 | 8044 | |
ccc6cda3 JA |
8045 | if (temp) |
8046 | { | |
8047 | temp1 = temp; | |
8048 | temp = quote_string (temp); | |
8049 | free (temp1); | |
bb70624e | 8050 | goto add_string; |
ccc6cda3 JA |
8051 | } |
8052 | else | |
8053 | { | |
8054 | /* Add NULL arg. */ | |
bb70624e JA |
8055 | c = CTLNUL; |
8056 | sindex--; /* add_character: label increments sindex */ | |
8057 | goto add_character; | |
ccc6cda3 | 8058 | } |
bb70624e | 8059 | |
ccc6cda3 | 8060 | /* break; */ |
726f6388 | 8061 | |
ccc6cda3 | 8062 | case '\'': |
7117c2d2 | 8063 | #if 0 |
95732b49 | 8064 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE)) |
7117c2d2 | 8065 | #else |
95732b49 | 8066 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
7117c2d2 | 8067 | #endif |
ccc6cda3 | 8068 | goto add_character; |
726f6388 | 8069 | |
ccc6cda3 JA |
8070 | t_index = ++sindex; |
8071 | temp = string_extract_single_quoted (string, &sindex); | |
726f6388 | 8072 | |
ccc6cda3 JA |
8073 | /* If the entire STRING was surrounded by single quotes, |
8074 | then the string is wholly quoted. */ | |
8075 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
8076 | ? WHOLLY_QUOTED | |
7117c2d2 | 8077 | : PARTIALLY_QUOTED; |
726f6388 | 8078 | |
ccc6cda3 JA |
8079 | /* If all we had was '', it is a null expansion. */ |
8080 | if (*temp == '\0') | |
8081 | { | |
8082 | free (temp); | |
8083 | temp = (char *)NULL; | |
8084 | } | |
8085 | else | |
7117c2d2 | 8086 | remove_quoted_escapes (temp); /* ??? */ |
726f6388 | 8087 | |
ccc6cda3 JA |
8088 | /* We do not want to add quoted nulls to strings that are only |
8089 | partially quoted; such nulls are discarded. */ | |
8090 | if (temp == 0 && (quoted_state == PARTIALLY_QUOTED)) | |
8091 | continue; | |
726f6388 | 8092 | |
bb70624e JA |
8093 | /* If we have a quoted null expansion, add a quoted NULL to istring. */ |
8094 | if (temp == 0) | |
8095 | { | |
8096 | c = CTLNUL; | |
8097 | sindex--; /* add_character: label increments sindex */ | |
8098 | goto add_character; | |
8099 | } | |
8100 | else | |
8101 | goto add_quoted_string; | |
8102 | ||
ccc6cda3 | 8103 | /* break; */ |
726f6388 JA |
8104 | |
8105 | default: | |
726f6388 | 8106 | /* This is the fix for " $@ " */ |
17345e5a | 8107 | add_ifs_character: |
7117c2d2 | 8108 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (isexp == 0 && isifs (c))) |
726f6388 | 8109 | { |
bb70624e JA |
8110 | if (string[sindex]) /* from old goto dollar_add_string */ |
8111 | sindex++; | |
8112 | if (c == 0) | |
8113 | { | |
8114 | c = CTLNUL; | |
8115 | goto add_character; | |
8116 | } | |
8117 | else | |
8118 | { | |
7117c2d2 | 8119 | #if HANDLE_MULTIBYTE |
b80f6443 JA |
8120 | if (MB_CUR_MAX > 1) |
8121 | sindex--; | |
8122 | ||
7117c2d2 JA |
8123 | if (MB_CUR_MAX > 1) |
8124 | { | |
b80f6443 | 8125 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
8126 | } |
8127 | else | |
8128 | #endif | |
8129 | { | |
8130 | twochars[0] = CTLESC; | |
8131 | twochars[1] = c; | |
8132 | goto add_twochars; | |
8133 | } | |
bb70624e | 8134 | } |
726f6388 JA |
8135 | } |
8136 | ||
7117c2d2 JA |
8137 | SADD_MBCHAR (temp, string, sindex, string_size); |
8138 | ||
726f6388 | 8139 | add_character: |
ccc6cda3 JA |
8140 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 1, istring_size, |
8141 | DEFAULT_ARRAY_SIZE); | |
726f6388 JA |
8142 | istring[istring_index++] = c; |
8143 | istring[istring_index] = '\0'; | |
8144 | ||
8145 | /* Next character. */ | |
8146 | sindex++; | |
8147 | } | |
8148 | } | |
8149 | ||
8150 | finished_with_string: | |
726f6388 JA |
8151 | /* OK, we're ready to return. If we have a quoted string, and |
8152 | quoted_dollar_at is not set, we do no splitting at all; otherwise | |
8153 | we split on ' '. The routines that call this will handle what to | |
8154 | do if nothing has been expanded. */ | |
ccc6cda3 JA |
8155 | |
8156 | /* Partially and wholly quoted strings which expand to the empty | |
8157 | string are retained as an empty arguments. Unquoted strings | |
8158 | which expand to the empty string are discarded. The single | |
8159 | exception is the case of expanding "$@" when there are no | |
8160 | positional parameters. In that case, we discard the expansion. */ | |
8161 | ||
8162 | /* Because of how the code that handles "" and '' in partially | |
8163 | quoted strings works, we need to make ISTRING into a QUOTED_NULL | |
8164 | if we saw quoting characters, but the expansion was empty. | |
8165 | "" and '' are tossed away before we get to this point when | |
8166 | processing partially quoted strings. This makes "" and $xxx"" | |
8167 | equivalent when xxx is unset. We also look to see whether we | |
8168 | saw a quoted null from a ${} expansion and add one back if we | |
8169 | need to. */ | |
8170 | ||
8171 | /* If we expand to nothing and there were no single or double quotes | |
8172 | in the word, we throw it away. Otherwise, we return a NULL word. | |
8173 | The single exception is for $@ surrounded by double quotes when | |
8174 | there are no positional parameters. In that case, we also throw | |
8175 | the word away. */ | |
8176 | ||
8177 | if (*istring == '\0') | |
8178 | { | |
8179 | if (quoted_dollar_at == 0 && (had_quoted_null || quoted_state == PARTIALLY_QUOTED)) | |
726f6388 | 8180 | { |
726f6388 JA |
8181 | istring[0] = CTLNUL; |
8182 | istring[1] = '\0'; | |
ccc6cda3 | 8183 | tword = make_bare_word (istring); |
95732b49 | 8184 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ |
ccc6cda3 JA |
8185 | list = make_word_list (tword, (WORD_LIST *)NULL); |
8186 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
8187 | tword->flags |= W_QUOTED; | |
726f6388 | 8188 | } |
ccc6cda3 JA |
8189 | /* According to sh, ksh, and Posix.2, if a word expands into nothing |
8190 | and a double-quoted "$@" appears anywhere in it, then the entire | |
8191 | word is removed. */ | |
8192 | else if (quoted_state == UNQUOTED || quoted_dollar_at) | |
8193 | list = (WORD_LIST *)NULL; | |
8194 | #if 0 | |
8195 | else | |
726f6388 | 8196 | { |
ccc6cda3 | 8197 | tword = make_bare_word (istring); |
ccc6cda3 JA |
8198 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
8199 | tword->flags |= W_QUOTED; | |
95732b49 | 8200 | list = make_word_list (tword, (WORD_LIST *)NULL); |
726f6388 | 8201 | } |
f73dda09 JA |
8202 | #else |
8203 | else | |
8204 | list = (WORD_LIST *)NULL; | |
ccc6cda3 JA |
8205 | #endif |
8206 | } | |
8207 | else if (word->flags & W_NOSPLIT) | |
8208 | { | |
8209 | tword = make_bare_word (istring); | |
ccc6cda3 JA |
8210 | if (word->flags & W_ASSIGNMENT) |
8211 | tword->flags |= W_ASSIGNMENT; /* XXX */ | |
95732b49 JA |
8212 | if (word->flags & W_COMPASSIGN) |
8213 | tword->flags |= W_COMPASSIGN; /* XXX */ | |
b72432fd JA |
8214 | if (word->flags & W_NOGLOB) |
8215 | tword->flags |= W_NOGLOB; /* XXX */ | |
95732b49 JA |
8216 | if (word->flags & W_NOEXPAND) |
8217 | tword->flags |= W_NOEXPAND; /* XXX */ | |
ccc6cda3 | 8218 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
28ef6c31 | 8219 | tword->flags |= W_QUOTED; |
95732b49 JA |
8220 | if (had_quoted_null) |
8221 | tword->flags |= W_HASQUOTEDNULL; | |
8222 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
ccc6cda3 JA |
8223 | } |
8224 | else | |
8225 | { | |
8226 | char *ifs_chars; | |
8227 | ||
7117c2d2 | 8228 | ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL; |
726f6388 | 8229 | |
cce855bc JA |
8230 | /* If we have $@, we need to split the results no matter what. If |
8231 | IFS is unset or NULL, string_list_dollar_at has separated the | |
8232 | positional parameters with a space, so we split on space (we have | |
8233 | set ifs_chars to " \t\n" above if ifs is unset). If IFS is set, | |
8234 | string_list_dollar_at has separated the positional parameters | |
8235 | with the first character of $IFS, so we split on $IFS. */ | |
8236 | if (has_dollar_at && ifs_chars) | |
8237 | list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1); | |
ccc6cda3 JA |
8238 | else |
8239 | { | |
8240 | tword = make_bare_word (istring); | |
ccc6cda3 JA |
8241 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED)) |
8242 | tword->flags |= W_QUOTED; | |
8243 | if (word->flags & W_ASSIGNMENT) | |
8244 | tword->flags |= W_ASSIGNMENT; | |
95732b49 JA |
8245 | if (word->flags & W_COMPASSIGN) |
8246 | tword->flags |= W_COMPASSIGN; | |
b72432fd JA |
8247 | if (word->flags & W_NOGLOB) |
8248 | tword->flags |= W_NOGLOB; | |
95732b49 JA |
8249 | if (word->flags & W_NOEXPAND) |
8250 | tword->flags |= W_NOEXPAND; | |
8251 | if (had_quoted_null) | |
8252 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ | |
8253 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
726f6388 | 8254 | } |
726f6388 | 8255 | } |
726f6388 | 8256 | |
ccc6cda3 JA |
8257 | free (istring); |
8258 | return (list); | |
726f6388 JA |
8259 | } |
8260 | ||
8261 | /* **************************************************************** */ | |
8262 | /* */ | |
8263 | /* Functions for Quote Removal */ | |
8264 | /* */ | |
8265 | /* **************************************************************** */ | |
8266 | ||
8267 | /* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the | |
7117c2d2 | 8268 | backslash quoting rules for within double quotes or a here document. */ |
726f6388 JA |
8269 | char * |
8270 | string_quote_removal (string, quoted) | |
8271 | char *string; | |
8272 | int quoted; | |
8273 | { | |
7117c2d2 JA |
8274 | size_t slen; |
8275 | char *r, *result_string, *temp, *send; | |
f73dda09 JA |
8276 | int sindex, tindex, dquote; |
8277 | unsigned char c; | |
7117c2d2 | 8278 | DECLARE_MBSTATE; |
726f6388 JA |
8279 | |
8280 | /* The result can be no longer than the original string. */ | |
7117c2d2 JA |
8281 | slen = strlen (string); |
8282 | send = string + slen; | |
8283 | ||
8284 | r = result_string = (char *)xmalloc (slen + 1); | |
726f6388 | 8285 | |
ccc6cda3 | 8286 | for (dquote = sindex = 0; c = string[sindex];) |
726f6388 JA |
8287 | { |
8288 | switch (c) | |
8289 | { | |
8290 | case '\\': | |
8291 | c = string[++sindex]; | |
3185942a JA |
8292 | if (c == 0) |
8293 | { | |
8294 | *r++ = '\\'; | |
8295 | break; | |
8296 | } | |
28ef6c31 | 8297 | if (((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) && (sh_syntaxtab[c] & CBSDQUOTE) == 0) |
726f6388 | 8298 | *r++ = '\\'; |
ccc6cda3 | 8299 | /* FALLTHROUGH */ |
726f6388 JA |
8300 | |
8301 | default: | |
7117c2d2 | 8302 | SCOPY_CHAR_M (r, string, send, sindex); |
726f6388 JA |
8303 | break; |
8304 | ||
8305 | case '\'': | |
ccc6cda3 | 8306 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) |
726f6388 JA |
8307 | { |
8308 | *r++ = c; | |
8309 | sindex++; | |
ccc6cda3 | 8310 | break; |
726f6388 | 8311 | } |
ccc6cda3 JA |
8312 | tindex = sindex + 1; |
8313 | temp = string_extract_single_quoted (string, &tindex); | |
8314 | if (temp) | |
726f6388 | 8315 | { |
ccc6cda3 JA |
8316 | strcpy (r, temp); |
8317 | r += strlen (r); | |
8318 | free (temp); | |
726f6388 | 8319 | } |
ccc6cda3 | 8320 | sindex = tindex; |
726f6388 JA |
8321 | break; |
8322 | ||
8323 | case '"': | |
8324 | dquote = 1 - dquote; | |
8325 | sindex++; | |
8326 | break; | |
8327 | } | |
8328 | } | |
8329 | *r = '\0'; | |
8330 | return (result_string); | |
8331 | } | |
8332 | ||
ccc6cda3 JA |
8333 | #if 0 |
8334 | /* UNUSED */ | |
726f6388 JA |
8335 | /* Perform quote removal on word WORD. This allocates and returns a new |
8336 | WORD_DESC *. */ | |
8337 | WORD_DESC * | |
8338 | word_quote_removal (word, quoted) | |
8339 | WORD_DESC *word; | |
8340 | int quoted; | |
8341 | { | |
8342 | WORD_DESC *w; | |
8343 | char *t; | |
8344 | ||
8345 | t = string_quote_removal (word->word, quoted); | |
95732b49 JA |
8346 | w = alloc_word_desc (); |
8347 | w->word = t ? t : savestring (""); | |
726f6388 JA |
8348 | return (w); |
8349 | } | |
8350 | ||
8351 | /* Perform quote removal on all words in LIST. If QUOTED is non-zero, | |
8352 | the members of the list are treated as if they are surrounded by | |
8353 | double quotes. Return a new list, or NULL if LIST is NULL. */ | |
8354 | WORD_LIST * | |
8355 | word_list_quote_removal (list, quoted) | |
8356 | WORD_LIST *list; | |
8357 | int quoted; | |
8358 | { | |
95732b49 | 8359 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 8360 | |
ccc6cda3 | 8361 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 8362 | { |
7117c2d2 | 8363 | tresult = make_word_list (word_quote_removal (t->word, quoted), (WORD_LIST *)NULL); |
95732b49 | 8364 | #if 0 |
726f6388 | 8365 | result = (WORD_LIST *) list_append (result, tresult); |
95732b49 JA |
8366 | #else |
8367 | if (result == 0) | |
8368 | result = e = tresult; | |
8369 | else | |
8370 | { | |
8371 | e->next = tresult; | |
8372 | while (e->next) | |
8373 | e = e->next; | |
8374 | } | |
8375 | #endif | |
726f6388 JA |
8376 | } |
8377 | return (result); | |
8378 | } | |
ccc6cda3 | 8379 | #endif |
726f6388 | 8380 | |
726f6388 JA |
8381 | /******************************************* |
8382 | * * | |
8383 | * Functions to perform word splitting * | |
8384 | * * | |
8385 | *******************************************/ | |
8386 | ||
7117c2d2 JA |
8387 | void |
8388 | setifs (v) | |
8389 | SHELL_VAR *v; | |
b72432fd | 8390 | { |
7117c2d2 JA |
8391 | char *t; |
8392 | unsigned char uc; | |
8393 | ||
8394 | ifs_var = v; | |
95732b49 | 8395 | ifs_value = (v && value_cell (v)) ? value_cell (v) : " \t\n"; |
b72432fd | 8396 | |
95732b49 JA |
8397 | /* Should really merge ifs_cmap with sh_syntaxtab. XXX - doesn't yet |
8398 | handle multibyte chars in IFS */ | |
7117c2d2 JA |
8399 | memset (ifs_cmap, '\0', sizeof (ifs_cmap)); |
8400 | for (t = ifs_value ; t && *t; t++) | |
8401 | { | |
8402 | uc = *t; | |
8403 | ifs_cmap[uc] = 1; | |
8404 | } | |
8405 | ||
95732b49 JA |
8406 | #if defined (HANDLE_MULTIBYTE) |
8407 | if (ifs_value == 0) | |
8408 | { | |
8409 | ifs_firstc[0] = '\0'; | |
8410 | ifs_firstc_len = 1; | |
8411 | } | |
8412 | else | |
8413 | { | |
8414 | size_t ifs_len; | |
8415 | ifs_len = strnlen (ifs_value, MB_CUR_MAX); | |
8416 | ifs_firstc_len = MBLEN (ifs_value, ifs_len); | |
8417 | if (ifs_firstc_len == 1 || ifs_firstc_len == 0 || MB_INVALIDCH (ifs_firstc_len)) | |
8418 | { | |
8419 | ifs_firstc[0] = ifs_value[0]; | |
8420 | ifs_firstc[1] = '\0'; | |
8421 | ifs_firstc_len = 1; | |
8422 | } | |
8423 | else | |
8424 | memcpy (ifs_firstc, ifs_value, ifs_firstc_len); | |
8425 | } | |
8426 | #else | |
7117c2d2 | 8427 | ifs_firstc = ifs_value ? *ifs_value : 0; |
95732b49 | 8428 | #endif |
7117c2d2 JA |
8429 | } |
8430 | ||
8431 | char * | |
8432 | getifs () | |
8433 | { | |
8434 | return ifs_value; | |
b72432fd JA |
8435 | } |
8436 | ||
726f6388 JA |
8437 | /* This splits a single word into a WORD LIST on $IFS, but only if the word |
8438 | is not quoted. list_string () performs quote removal for us, even if we | |
8439 | don't do any splitting. */ | |
8440 | WORD_LIST * | |
7117c2d2 | 8441 | word_split (w, ifs_chars) |
726f6388 | 8442 | WORD_DESC *w; |
7117c2d2 | 8443 | char *ifs_chars; |
726f6388 JA |
8444 | { |
8445 | WORD_LIST *result; | |
8446 | ||
8447 | if (w) | |
8448 | { | |
7117c2d2 | 8449 | char *xifs; |
726f6388 | 8450 | |
7117c2d2 JA |
8451 | xifs = ((w->flags & W_QUOTED) || ifs_chars == 0) ? "" : ifs_chars; |
8452 | result = list_string (w->word, xifs, w->flags & W_QUOTED); | |
726f6388 JA |
8453 | } |
8454 | else | |
8455 | result = (WORD_LIST *)NULL; | |
ccc6cda3 | 8456 | |
726f6388 JA |
8457 | return (result); |
8458 | } | |
8459 | ||
8460 | /* Perform word splitting on LIST and return the RESULT. It is possible | |
8461 | to return (WORD_LIST *)NULL. */ | |
8462 | static WORD_LIST * | |
8463 | word_list_split (list) | |
8464 | WORD_LIST *list; | |
8465 | { | |
95732b49 | 8466 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 8467 | |
ccc6cda3 | 8468 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 8469 | { |
7117c2d2 | 8470 | tresult = word_split (t->word, ifs_value); |
95732b49 JA |
8471 | if (result == 0) |
8472 | result = e = tresult; | |
8473 | else | |
8474 | { | |
8475 | e->next = tresult; | |
8476 | while (e->next) | |
8477 | e = e->next; | |
8478 | } | |
726f6388 JA |
8479 | } |
8480 | return (result); | |
8481 | } | |
8482 | ||
8483 | /************************************************** | |
8484 | * * | |
cce855bc | 8485 | * Functions to expand an entire WORD_LIST * |
726f6388 JA |
8486 | * * |
8487 | **************************************************/ | |
8488 | ||
b80f6443 JA |
8489 | /* Do any word-expansion-specific cleanup and jump to top_level */ |
8490 | static void | |
8491 | exp_jump_to_top_level (v) | |
8492 | int v; | |
8493 | { | |
3185942a JA |
8494 | set_pipestatus_from_exit (last_command_exit_value); |
8495 | ||
b80f6443 JA |
8496 | /* Cleanup code goes here. */ |
8497 | expand_no_split_dollar_star = 0; /* XXX */ | |
8498 | expanding_redir = 0; | |
3185942a | 8499 | assigning_in_environment = 0; |
b80f6443 | 8500 | |
f1be666c JA |
8501 | if (parse_and_execute_level == 0) |
8502 | top_level_cleanup (); /* from sig.c */ | |
8503 | ||
b80f6443 JA |
8504 | jump_to_top_level (v); |
8505 | } | |
8506 | ||
cce855bc JA |
8507 | /* Put NLIST (which is a WORD_LIST * of only one element) at the front of |
8508 | ELIST, and set ELIST to the new list. */ | |
8509 | #define PREPEND_LIST(nlist, elist) \ | |
8510 | do { nlist->next = elist; elist = nlist; } while (0) | |
8511 | ||
726f6388 JA |
8512 | /* Separate out any initial variable assignments from TLIST. If set -k has |
8513 | been executed, remove all assignment statements from TLIST. Initial | |
8514 | variable assignments and other environment assignments are placed | |
bb70624e | 8515 | on SUBST_ASSIGN_VARLIST. */ |
726f6388 JA |
8516 | static WORD_LIST * |
8517 | separate_out_assignments (tlist) | |
8518 | WORD_LIST *tlist; | |
8519 | { | |
8520 | register WORD_LIST *vp, *lp; | |
8521 | ||
0001803f | 8522 | if (tlist == 0) |
726f6388 JA |
8523 | return ((WORD_LIST *)NULL); |
8524 | ||
bb70624e JA |
8525 | if (subst_assign_varlist) |
8526 | dispose_words (subst_assign_varlist); /* Clean up after previous error */ | |
b72432fd | 8527 | |
bb70624e | 8528 | subst_assign_varlist = (WORD_LIST *)NULL; |
726f6388 JA |
8529 | vp = lp = tlist; |
8530 | ||
8531 | /* Separate out variable assignments at the start of the command. | |
8532 | Loop invariant: vp->next == lp | |
8533 | Loop postcondition: | |
7117c2d2 JA |
8534 | lp = list of words left after assignment statements skipped |
8535 | tlist = original list of words | |
726f6388 | 8536 | */ |
ccc6cda3 | 8537 | while (lp && (lp->word->flags & W_ASSIGNMENT)) |
726f6388 JA |
8538 | { |
8539 | vp = lp; | |
8540 | lp = lp->next; | |
8541 | } | |
8542 | ||
bb70624e JA |
8543 | /* If lp != tlist, we have some initial assignment statements. |
8544 | We make SUBST_ASSIGN_VARLIST point to the list of assignment | |
8545 | words and TLIST point to the remaining words. */ | |
726f6388 JA |
8546 | if (lp != tlist) |
8547 | { | |
bb70624e | 8548 | subst_assign_varlist = tlist; |
726f6388 JA |
8549 | /* ASSERT(vp->next == lp); */ |
8550 | vp->next = (WORD_LIST *)NULL; /* terminate variable list */ | |
8551 | tlist = lp; /* remainder of word list */ | |
8552 | } | |
8553 | ||
8554 | /* vp == end of variable list */ | |
8555 | /* tlist == remainder of original word list without variable assignments */ | |
8556 | if (!tlist) | |
8557 | /* All the words in tlist were assignment statements */ | |
8558 | return ((WORD_LIST *)NULL); | |
8559 | ||
8560 | /* ASSERT(tlist != NULL); */ | |
ccc6cda3 | 8561 | /* ASSERT((tlist->word->flags & W_ASSIGNMENT) == 0); */ |
726f6388 JA |
8562 | |
8563 | /* If the -k option is in effect, we need to go through the remaining | |
bb70624e JA |
8564 | words, separate out the assignment words, and place them on |
8565 | SUBST_ASSIGN_VARLIST. */ | |
726f6388 JA |
8566 | if (place_keywords_in_env) |
8567 | { | |
8568 | WORD_LIST *tp; /* tp == running pointer into tlist */ | |
8569 | ||
8570 | tp = tlist; | |
8571 | lp = tlist->next; | |
8572 | ||
8573 | /* Loop Invariant: tp->next == lp */ | |
8574 | /* Loop postcondition: tlist == word list without assignment statements */ | |
8575 | while (lp) | |
8576 | { | |
ccc6cda3 | 8577 | if (lp->word->flags & W_ASSIGNMENT) |
726f6388 JA |
8578 | { |
8579 | /* Found an assignment statement, add this word to end of | |
bb70624e JA |
8580 | subst_assign_varlist (vp). */ |
8581 | if (!subst_assign_varlist) | |
8582 | subst_assign_varlist = vp = lp; | |
726f6388 JA |
8583 | else |
8584 | { | |
8585 | vp->next = lp; | |
8586 | vp = lp; | |
8587 | } | |
8588 | ||
8589 | /* Remove the word pointed to by LP from TLIST. */ | |
8590 | tp->next = lp->next; | |
8591 | /* ASSERT(vp == lp); */ | |
8592 | lp->next = (WORD_LIST *)NULL; | |
8593 | lp = tp->next; | |
8594 | } | |
8595 | else | |
8596 | { | |
8597 | tp = lp; | |
8598 | lp = lp->next; | |
8599 | } | |
8600 | } | |
8601 | } | |
8602 | return (tlist); | |
8603 | } | |
8604 | ||
cce855bc JA |
8605 | #define WEXP_VARASSIGN 0x001 |
8606 | #define WEXP_BRACEEXP 0x002 | |
8607 | #define WEXP_TILDEEXP 0x004 | |
8608 | #define WEXP_PARAMEXP 0x008 | |
8609 | #define WEXP_PATHEXP 0x010 | |
8610 | ||
8611 | /* All of the expansions, including variable assignments at the start of | |
8612 | the list. */ | |
8613 | #define WEXP_ALL (WEXP_VARASSIGN|WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
8614 | ||
8615 | /* All of the expansions except variable assignments at the start of | |
8616 | the list. */ | |
8617 | #define WEXP_NOVARS (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
8618 | ||
8619 | /* All of the `shell expansions': brace expansion, tilde expansion, parameter | |
8620 | expansion, command substitution, arithmetic expansion, word splitting, and | |
8621 | quote removal. */ | |
8622 | #define WEXP_SHELLEXP (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP) | |
8623 | ||
726f6388 JA |
8624 | /* Take the list of words in LIST and do the various substitutions. Return |
8625 | a new list of words which is the expanded list, and without things like | |
8626 | variable assignments. */ | |
8627 | ||
8628 | WORD_LIST * | |
8629 | expand_words (list) | |
8630 | WORD_LIST *list; | |
8631 | { | |
cce855bc | 8632 | return (expand_word_list_internal (list, WEXP_ALL)); |
726f6388 JA |
8633 | } |
8634 | ||
8635 | /* Same as expand_words (), but doesn't hack variable or environment | |
8636 | variables. */ | |
8637 | WORD_LIST * | |
8638 | expand_words_no_vars (list) | |
8639 | WORD_LIST *list; | |
8640 | { | |
cce855bc | 8641 | return (expand_word_list_internal (list, WEXP_NOVARS)); |
726f6388 JA |
8642 | } |
8643 | ||
cce855bc JA |
8644 | WORD_LIST * |
8645 | expand_words_shellexp (list) | |
726f6388 | 8646 | WORD_LIST *list; |
726f6388 | 8647 | { |
cce855bc JA |
8648 | return (expand_word_list_internal (list, WEXP_SHELLEXP)); |
8649 | } | |
726f6388 | 8650 | |
cce855bc JA |
8651 | static WORD_LIST * |
8652 | glob_expand_word_list (tlist, eflags) | |
8653 | WORD_LIST *tlist; | |
8654 | int eflags; | |
8655 | { | |
8656 | char **glob_array, *temp_string; | |
8657 | register int glob_index; | |
8658 | WORD_LIST *glob_list, *output_list, *disposables, *next; | |
8659 | WORD_DESC *tword; | |
726f6388 | 8660 | |
cce855bc JA |
8661 | output_list = disposables = (WORD_LIST *)NULL; |
8662 | glob_array = (char **)NULL; | |
8663 | while (tlist) | |
8664 | { | |
8665 | /* For each word, either globbing is attempted or the word is | |
8666 | added to orig_list. If globbing succeeds, the results are | |
8667 | added to orig_list and the word (tlist) is added to the list | |
8668 | of disposable words. If globbing fails and failed glob | |
8669 | expansions are left unchanged (the shell default), the | |
8670 | original word is added to orig_list. If globbing fails and | |
8671 | failed glob expansions are removed, the original word is | |
8672 | added to the list of disposable words. orig_list ends up | |
7117c2d2 | 8673 | in reverse order and requires a call to REVERSE_LIST to |
cce855bc JA |
8674 | be set right. After all words are examined, the disposable |
8675 | words are freed. */ | |
8676 | next = tlist->next; | |
726f6388 | 8677 | |
cce855bc | 8678 | /* If the word isn't an assignment and contains an unquoted |
28ef6c31 | 8679 | pattern matching character, then glob it. */ |
b72432fd | 8680 | if ((tlist->word->flags & W_NOGLOB) == 0 && |
cce855bc | 8681 | unquoted_glob_pattern_p (tlist->word->word)) |
726f6388 | 8682 | { |
cce855bc JA |
8683 | glob_array = shell_glob_filename (tlist->word->word); |
8684 | ||
8685 | /* Handle error cases. | |
8686 | I don't think we should report errors like "No such file | |
8687 | or directory". However, I would like to report errors | |
8688 | like "Read failed". */ | |
8689 | ||
b80f6443 | 8690 | if (glob_array == 0 || GLOB_FAILED (glob_array)) |
726f6388 | 8691 | { |
bb70624e | 8692 | glob_array = (char **)xmalloc (sizeof (char *)); |
cce855bc JA |
8693 | glob_array[0] = (char *)NULL; |
8694 | } | |
8695 | ||
8696 | /* Dequote the current word in case we have to use it. */ | |
8697 | if (glob_array[0] == NULL) | |
8698 | { | |
8699 | temp_string = dequote_string (tlist->word->word); | |
8700 | free (tlist->word->word); | |
8701 | tlist->word->word = temp_string; | |
8702 | } | |
8703 | ||
8704 | /* Make the array into a word list. */ | |
8705 | glob_list = (WORD_LIST *)NULL; | |
8706 | for (glob_index = 0; glob_array[glob_index]; glob_index++) | |
8707 | { | |
8708 | tword = make_bare_word (glob_array[glob_index]); | |
8709 | tword->flags |= W_GLOBEXP; /* XXX */ | |
8710 | glob_list = make_word_list (tword, glob_list); | |
8711 | } | |
8712 | ||
8713 | if (glob_list) | |
8714 | { | |
8715 | output_list = (WORD_LIST *)list_append (glob_list, output_list); | |
8716 | PREPEND_LIST (tlist, disposables); | |
8717 | } | |
b80f6443 JA |
8718 | else if (fail_glob_expansion != 0) |
8719 | { | |
8720 | report_error (_("no match: %s"), tlist->word->word); | |
f1be666c | 8721 | exp_jump_to_top_level (DISCARD); |
b80f6443 | 8722 | } |
cce855bc JA |
8723 | else if (allow_null_glob_expansion == 0) |
8724 | { | |
8725 | /* Failed glob expressions are left unchanged. */ | |
8726 | PREPEND_LIST (tlist, output_list); | |
8727 | } | |
8728 | else | |
8729 | { | |
8730 | /* Failed glob expressions are removed. */ | |
8731 | PREPEND_LIST (tlist, disposables); | |
726f6388 | 8732 | } |
726f6388 | 8733 | } |
cce855bc JA |
8734 | else |
8735 | { | |
8736 | /* Dequote the string. */ | |
8737 | temp_string = dequote_string (tlist->word->word); | |
8738 | free (tlist->word->word); | |
8739 | tlist->word->word = temp_string; | |
8740 | PREPEND_LIST (tlist, output_list); | |
8741 | } | |
8742 | ||
7117c2d2 | 8743 | strvec_dispose (glob_array); |
cce855bc JA |
8744 | glob_array = (char **)NULL; |
8745 | ||
8746 | tlist = next; | |
726f6388 JA |
8747 | } |
8748 | ||
cce855bc JA |
8749 | if (disposables) |
8750 | dispose_words (disposables); | |
8751 | ||
8752 | if (output_list) | |
8753 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
8754 | ||
8755 | return (output_list); | |
8756 | } | |
726f6388 JA |
8757 | |
8758 | #if defined (BRACE_EXPANSION) | |
cce855bc JA |
8759 | static WORD_LIST * |
8760 | brace_expand_word_list (tlist, eflags) | |
8761 | WORD_LIST *tlist; | |
8762 | int eflags; | |
8763 | { | |
8764 | register char **expansions; | |
8765 | char *temp_string; | |
8766 | WORD_LIST *disposables, *output_list, *next; | |
8767 | WORD_DESC *w; | |
8768 | int eindex; | |
8769 | ||
8770 | for (disposables = output_list = (WORD_LIST *)NULL; tlist; tlist = next) | |
726f6388 | 8771 | { |
cce855bc | 8772 | next = tlist->next; |
726f6388 | 8773 | |
0001803f CR |
8774 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) |
8775 | { | |
8776 | /*itrace("brace_expand_word_list: %s: W_COMPASSIGN|W_ASSIGNARG", tlist->word->word);*/ | |
8777 | PREPEND_LIST (tlist, output_list); | |
8778 | continue; | |
8779 | } | |
8780 | ||
cce855bc JA |
8781 | /* Only do brace expansion if the word has a brace character. If |
8782 | not, just add the word list element to BRACES and continue. In | |
8783 | the common case, at least when running shell scripts, this will | |
0001803f | 8784 | degenerate to a bunch of calls to `mbschr', and then what is |
cce855bc | 8785 | basically a reversal of TLIST into BRACES, which is corrected |
7117c2d2 | 8786 | by a call to REVERSE_LIST () on BRACES when the end of TLIST |
cce855bc | 8787 | is reached. */ |
0001803f | 8788 | if (mbschr (tlist->word->word, LBRACE)) |
726f6388 | 8789 | { |
cce855bc | 8790 | expansions = brace_expand (tlist->word->word); |
726f6388 | 8791 | |
cce855bc | 8792 | for (eindex = 0; temp_string = expansions[eindex]; eindex++) |
726f6388 | 8793 | { |
cce855bc JA |
8794 | w = make_word (temp_string); |
8795 | /* If brace expansion didn't change the word, preserve | |
8796 | the flags. We may want to preserve the flags | |
8797 | unconditionally someday -- XXX */ | |
8798 | if (STREQ (temp_string, tlist->word->word)) | |
8799 | w->flags = tlist->word->flags; | |
8800 | output_list = make_word_list (w, output_list); | |
8801 | free (expansions[eindex]); | |
726f6388 | 8802 | } |
cce855bc | 8803 | free (expansions); |
726f6388 | 8804 | |
cce855bc JA |
8805 | /* Add TLIST to the list of words to be freed after brace |
8806 | expansion has been performed. */ | |
8807 | PREPEND_LIST (tlist, disposables); | |
8808 | } | |
8809 | else | |
8810 | PREPEND_LIST (tlist, output_list); | |
726f6388 | 8811 | } |
cce855bc JA |
8812 | |
8813 | if (disposables) | |
8814 | dispose_words (disposables); | |
8815 | ||
8816 | if (output_list) | |
8817 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
8818 | ||
8819 | return (output_list); | |
8820 | } | |
8821 | #endif | |
8822 | ||
3185942a JA |
8823 | #if defined (ARRAY_VARS) |
8824 | /* Take WORD, a compound associative array assignment, and internally run | |
8825 | 'declare -A w', where W is the variable name portion of WORD. */ | |
8826 | static int | |
8827 | make_internal_declare (word, option) | |
8828 | char *word; | |
8829 | char *option; | |
8830 | { | |
8831 | int t; | |
8832 | WORD_LIST *wl; | |
8833 | WORD_DESC *w; | |
8834 | ||
8835 | w = make_word (word); | |
8836 | ||
8837 | t = assignment (w->word, 0); | |
8838 | w->word[t] = '\0'; | |
8839 | ||
8840 | wl = make_word_list (w, (WORD_LIST *)NULL); | |
8841 | wl = make_word_list (make_word (option), wl); | |
8842 | ||
8843 | return (declare_builtin (wl)); | |
8844 | } | |
8845 | #endif | |
8846 | ||
cce855bc JA |
8847 | static WORD_LIST * |
8848 | shell_expand_word_list (tlist, eflags) | |
8849 | WORD_LIST *tlist; | |
8850 | int eflags; | |
8851 | { | |
8852 | WORD_LIST *expanded, *orig_list, *new_list, *next, *temp_list; | |
8853 | int expanded_something, has_dollar_at; | |
8854 | char *temp_string; | |
726f6388 | 8855 | |
726f6388 | 8856 | /* We do tilde expansion all the time. This is what 1003.2 says. */ |
cce855bc JA |
8857 | new_list = (WORD_LIST *)NULL; |
8858 | for (orig_list = tlist; tlist; tlist = next) | |
726f6388 | 8859 | { |
ccc6cda3 | 8860 | temp_string = tlist->word->word; |
726f6388 JA |
8861 | |
8862 | next = tlist->next; | |
8863 | ||
95732b49 JA |
8864 | #if defined (ARRAY_VARS) |
8865 | /* If this is a compound array assignment to a builtin that accepts | |
8866 | such assignments (e.g., `declare'), take the assignment and perform | |
8867 | it separately, handling the semantics of declarations inside shell | |
8868 | functions. This avoids the double-evaluation of such arguments, | |
8869 | because `declare' does some evaluation of compound assignments on | |
8870 | its own. */ | |
8871 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) | |
8872 | { | |
8873 | int t; | |
8874 | ||
3185942a JA |
8875 | if (tlist->word->flags & W_ASSIGNASSOC) |
8876 | make_internal_declare (tlist->word->word, "-A"); | |
8877 | ||
95732b49 JA |
8878 | t = do_word_assignment (tlist->word); |
8879 | if (t == 0) | |
8880 | { | |
8881 | last_command_exit_value = EXECUTION_FAILURE; | |
8882 | exp_jump_to_top_level (DISCARD); | |
8883 | } | |
8884 | ||
8885 | /* Now transform the word as ksh93 appears to do and go on */ | |
8886 | t = assignment (tlist->word->word, 0); | |
8887 | tlist->word->word[t] = '\0'; | |
3185942a | 8888 | tlist->word->flags &= ~(W_ASSIGNMENT|W_NOSPLIT|W_COMPASSIGN|W_ASSIGNARG|W_ASSIGNASSOC); |
726f6388 | 8889 | } |
95732b49 | 8890 | #endif |
726f6388 | 8891 | |
ccc6cda3 | 8892 | expanded_something = 0; |
726f6388 | 8893 | expanded = expand_word_internal |
b72432fd | 8894 | (tlist->word, 0, 0, &has_dollar_at, &expanded_something); |
726f6388 JA |
8895 | |
8896 | if (expanded == &expand_word_error || expanded == &expand_word_fatal) | |
8897 | { | |
8898 | /* By convention, each time this error is returned, | |
8899 | tlist->word->word has already been freed. */ | |
8900 | tlist->word->word = (char *)NULL; | |
ccc6cda3 | 8901 | |
726f6388 JA |
8902 | /* Dispose our copy of the original list. */ |
8903 | dispose_words (orig_list); | |
d166f048 | 8904 | /* Dispose the new list we're building. */ |
726f6388 JA |
8905 | dispose_words (new_list); |
8906 | ||
28ef6c31 | 8907 | last_command_exit_value = EXECUTION_FAILURE; |
726f6388 | 8908 | if (expanded == &expand_word_error) |
b80f6443 | 8909 | exp_jump_to_top_level (DISCARD); |
726f6388 | 8910 | else |
b80f6443 | 8911 | exp_jump_to_top_level (FORCE_EOF); |
726f6388 JA |
8912 | } |
8913 | ||
ccc6cda3 JA |
8914 | /* Don't split words marked W_NOSPLIT. */ |
8915 | if (expanded_something && (tlist->word->flags & W_NOSPLIT) == 0) | |
726f6388 | 8916 | { |
ccc6cda3 | 8917 | temp_list = word_list_split (expanded); |
726f6388 JA |
8918 | dispose_words (expanded); |
8919 | } | |
8920 | else | |
8921 | { | |
8922 | /* If no parameter expansion, command substitution, process | |
8923 | substitution, or arithmetic substitution took place, then | |
8924 | do not do word splitting. We still have to remove quoted | |
8925 | null characters from the result. */ | |
8926 | word_list_remove_quoted_nulls (expanded); | |
ccc6cda3 | 8927 | temp_list = expanded; |
726f6388 JA |
8928 | } |
8929 | ||
ccc6cda3 JA |
8930 | expanded = REVERSE_LIST (temp_list, WORD_LIST *); |
8931 | new_list = (WORD_LIST *)list_append (expanded, new_list); | |
726f6388 JA |
8932 | } |
8933 | ||
cce855bc JA |
8934 | if (orig_list) |
8935 | dispose_words (orig_list); | |
726f6388 | 8936 | |
726f6388 | 8937 | if (new_list) |
cce855bc | 8938 | new_list = REVERSE_LIST (new_list, WORD_LIST *); |
726f6388 | 8939 | |
cce855bc JA |
8940 | return (new_list); |
8941 | } | |
726f6388 | 8942 | |
cce855bc JA |
8943 | /* The workhorse for expand_words () and expand_words_no_vars (). |
8944 | First arg is LIST, a WORD_LIST of words. | |
b72432fd JA |
8945 | Second arg EFLAGS is a flags word controlling which expansions are |
8946 | performed. | |
726f6388 | 8947 | |
cce855bc JA |
8948 | This does all of the substitutions: brace expansion, tilde expansion, |
8949 | parameter expansion, command substitution, arithmetic expansion, | |
8950 | process substitution, word splitting, and pathname expansion, according | |
8951 | to the bits set in EFLAGS. Words with the W_QUOTED or W_NOSPLIT bits | |
8952 | set, or for which no expansion is done, do not undergo word splitting. | |
b72432fd | 8953 | Words with the W_NOGLOB bit set do not undergo pathname expansion. */ |
cce855bc JA |
8954 | static WORD_LIST * |
8955 | expand_word_list_internal (list, eflags) | |
8956 | WORD_LIST *list; | |
8957 | int eflags; | |
8958 | { | |
8959 | WORD_LIST *new_list, *temp_list; | |
8960 | int tint; | |
726f6388 | 8961 | |
cce855bc JA |
8962 | if (list == 0) |
8963 | return ((WORD_LIST *)NULL); | |
726f6388 | 8964 | |
bb70624e | 8965 | garglist = new_list = copy_word_list (list); |
cce855bc JA |
8966 | if (eflags & WEXP_VARASSIGN) |
8967 | { | |
bb70624e | 8968 | garglist = new_list = separate_out_assignments (new_list); |
cce855bc JA |
8969 | if (new_list == 0) |
8970 | { | |
bb70624e | 8971 | if (subst_assign_varlist) |
cce855bc JA |
8972 | { |
8973 | /* All the words were variable assignments, so they are placed | |
8974 | into the shell's environment. */ | |
bb70624e | 8975 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
cce855bc JA |
8976 | { |
8977 | this_command_name = (char *)NULL; /* no arithmetic errors */ | |
95732b49 | 8978 | tint = do_word_assignment (temp_list->word); |
cce855bc JA |
8979 | /* Variable assignment errors in non-interactive shells |
8980 | running in Posix.2 mode cause the shell to exit. */ | |
28ef6c31 | 8981 | if (tint == 0) |
ccc6cda3 | 8982 | { |
cce855bc | 8983 | last_command_exit_value = EXECUTION_FAILURE; |
28ef6c31 | 8984 | if (interactive_shell == 0 && posixly_correct) |
b80f6443 | 8985 | exp_jump_to_top_level (FORCE_EOF); |
28ef6c31 | 8986 | else |
b80f6443 | 8987 | exp_jump_to_top_level (DISCARD); |
ccc6cda3 | 8988 | } |
726f6388 | 8989 | } |
bb70624e JA |
8990 | dispose_words (subst_assign_varlist); |
8991 | subst_assign_varlist = (WORD_LIST *)NULL; | |
cce855bc JA |
8992 | } |
8993 | return ((WORD_LIST *)NULL); | |
8994 | } | |
8995 | } | |
726f6388 | 8996 | |
cce855bc JA |
8997 | /* Begin expanding the words that remain. The expansions take place on |
8998 | things that aren't really variable assignments. */ | |
726f6388 | 8999 | |
cce855bc JA |
9000 | #if defined (BRACE_EXPANSION) |
9001 | /* Do brace expansion on this word if there are any brace characters | |
9002 | in the string. */ | |
9003 | if ((eflags & WEXP_BRACEEXP) && brace_expansion && new_list) | |
9004 | new_list = brace_expand_word_list (new_list, eflags); | |
9005 | #endif /* BRACE_EXPANSION */ | |
726f6388 | 9006 | |
cce855bc JA |
9007 | /* Perform the `normal' shell expansions: tilde expansion, parameter and |
9008 | variable substitution, command substitution, arithmetic expansion, | |
9009 | and word splitting. */ | |
9010 | new_list = shell_expand_word_list (new_list, eflags); | |
726f6388 | 9011 | |
cce855bc JA |
9012 | /* Okay, we're almost done. Now let's just do some filename |
9013 | globbing. */ | |
9014 | if (new_list) | |
9015 | { | |
9016 | if ((eflags & WEXP_PATHEXP) && disallow_filename_globbing == 0) | |
9017 | /* Glob expand the word list unless globbing has been disabled. */ | |
9018 | new_list = glob_expand_word_list (new_list, eflags); | |
726f6388 | 9019 | else |
cce855bc JA |
9020 | /* Dequote the words, because we're not performing globbing. */ |
9021 | new_list = dequote_list (new_list); | |
726f6388 JA |
9022 | } |
9023 | ||
bb70624e | 9024 | if ((eflags & WEXP_VARASSIGN) && subst_assign_varlist) |
726f6388 | 9025 | { |
95732b49 | 9026 | sh_wassign_func_t *assign_func; |
726f6388 JA |
9027 | |
9028 | /* If the remainder of the words expand to nothing, Posix.2 requires | |
9029 | that the variable and environment assignments affect the shell's | |
9030 | environment. */ | |
95732b49 | 9031 | assign_func = new_list ? assign_in_env : do_word_assignment; |
b80f6443 | 9032 | tempenv_assign_error = 0; |
726f6388 | 9033 | |
bb70624e | 9034 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
726f6388 | 9035 | { |
ccc6cda3 | 9036 | this_command_name = (char *)NULL; |
3185942a | 9037 | assigning_in_environment = (assign_func == assign_in_env); |
95732b49 | 9038 | tint = (*assign_func) (temp_list->word); |
3185942a | 9039 | assigning_in_environment = 0; |
ccc6cda3 JA |
9040 | /* Variable assignment errors in non-interactive shells running |
9041 | in Posix.2 mode cause the shell to exit. */ | |
b80f6443 | 9042 | if (tint == 0) |
ccc6cda3 | 9043 | { |
95732b49 | 9044 | if (assign_func == do_word_assignment) |
b80f6443 JA |
9045 | { |
9046 | last_command_exit_value = EXECUTION_FAILURE; | |
9047 | if (interactive_shell == 0 && posixly_correct) | |
9048 | exp_jump_to_top_level (FORCE_EOF); | |
9049 | else | |
9050 | exp_jump_to_top_level (DISCARD); | |
9051 | } | |
28ef6c31 | 9052 | else |
b80f6443 | 9053 | tempenv_assign_error++; |
ccc6cda3 | 9054 | } |
726f6388 | 9055 | } |
726f6388 | 9056 | |
bb70624e JA |
9057 | dispose_words (subst_assign_varlist); |
9058 | subst_assign_varlist = (WORD_LIST *)NULL; | |
726f6388 JA |
9059 | } |
9060 | ||
cce855bc | 9061 | #if 0 |
ccc6cda3 JA |
9062 | tint = list_length (new_list) + 1; |
9063 | RESIZE_MALLOCED_BUFFER (glob_argv_flags, 0, tint, glob_argv_flags_size, 16); | |
cce855bc JA |
9064 | for (tint = 0, temp_list = new_list; temp_list; temp_list = temp_list->next) |
9065 | glob_argv_flags[tint++] = (temp_list->word->flags & W_GLOBEXP) ? '1' : '0'; | |
ccc6cda3 | 9066 | glob_argv_flags[tint] = '\0'; |
ccc6cda3 | 9067 | #endif |
726f6388 | 9068 | |
cce855bc | 9069 | return (new_list); |
ccc6cda3 | 9070 | } |