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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 | ||
495aee44 | 7 | /* Copyright (C) 1987-2010 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" | |
495aee44 | 45 | #include "parser.h" |
726f6388 JA |
46 | #include "flags.h" |
47 | #include "jobs.h" | |
48 | #include "execute_cmd.h" | |
49 | #include "filecntl.h" | |
ccc6cda3 JA |
50 | #include "trap.h" |
51 | #include "pathexp.h" | |
52 | #include "mailcheck.h" | |
53 | ||
7117c2d2 | 54 | #include "shmbutil.h" |
495aee44 | 55 | #include "typemax.h" |
7117c2d2 | 56 | |
ccc6cda3 JA |
57 | #include "builtins/getopt.h" |
58 | #include "builtins/common.h" | |
726f6388 | 59 | |
3185942a JA |
60 | #include "builtins/builtext.h" |
61 | ||
cce855bc | 62 | #include <tilde/tilde.h> |
f73dda09 | 63 | #include <glob/strmatch.h> |
ccc6cda3 JA |
64 | |
65 | #if !defined (errno) | |
66 | extern int errno; | |
67 | #endif /* !errno */ | |
726f6388 JA |
68 | |
69 | /* The size that strings change by. */ | |
d166f048 | 70 | #define DEFAULT_INITIAL_ARRAY_SIZE 112 |
ccc6cda3 JA |
71 | #define DEFAULT_ARRAY_SIZE 128 |
72 | ||
73 | /* Variable types. */ | |
74 | #define VT_VARIABLE 0 | |
75 | #define VT_POSPARMS 1 | |
76 | #define VT_ARRAYVAR 2 | |
d166f048 | 77 | #define VT_ARRAYMEMBER 3 |
3185942a | 78 | #define VT_ASSOCVAR 4 |
726f6388 | 79 | |
b80f6443 JA |
80 | #define VT_STARSUB 128 /* $* or ${array[*]} -- used to split */ |
81 | ||
ccc6cda3 JA |
82 | /* Flags for quoted_strchr */ |
83 | #define ST_BACKSL 0x01 | |
84 | #define ST_CTLESC 0x02 | |
7117c2d2 JA |
85 | #define ST_SQUOTE 0x04 /* unused yet */ |
86 | #define ST_DQUOTE 0x08 /* unused yet */ | |
87 | ||
b80f6443 JA |
88 | /* Flags for the `pflags' argument to param_expand() */ |
89 | #define PF_NOCOMSUB 0x01 /* Do not perform command substitution */ | |
89a92869 | 90 | #define PF_IGNUNBOUND 0x02 /* ignore unbound vars even if -u set */ |
0001803f | 91 | #define PF_NOSPLIT2 0x04 /* same as W_NOSPLIT2 */ |
b80f6443 | 92 | |
cce855bc JA |
93 | /* These defs make it easier to use the editor. */ |
94 | #define LBRACE '{' | |
95 | #define RBRACE '}' | |
96 | #define LPAREN '(' | |
97 | #define RPAREN ')' | |
726f6388 | 98 | |
0001803f CR |
99 | #if defined (HANDLE_MULTIBYTE) |
100 | #define WLPAREN L'(' | |
101 | #define WRPAREN L')' | |
102 | #endif | |
103 | ||
28ef6c31 JA |
104 | /* Evaluates to 1 if C is one of the shell's special parameters whose length |
105 | can be taken, but is also one of the special expansion characters. */ | |
106 | #define VALID_SPECIAL_LENGTH_PARAM(c) \ | |
107 | ((c) == '-' || (c) == '?' || (c) == '#') | |
108 | ||
109 | /* Evaluates to 1 if C is one of the shell's special parameters for which an | |
110 | indirect variable reference may be made. */ | |
111 | #define VALID_INDIR_PARAM(c) \ | |
495aee44 | 112 | ((posixly_correct == 0 && (c) == '#') || (posixly_correct == 0 && (c) == '?') || (c) == '@' || (c) == '*') |
28ef6c31 JA |
113 | |
114 | /* Evaluates to 1 if C is one of the OP characters that follows the parameter | |
115 | in ${parameter[:]OPword}. */ | |
7117c2d2 | 116 | #define VALID_PARAM_EXPAND_CHAR(c) (sh_syntaxtab[(unsigned char)c] & CSUBSTOP) |
28ef6c31 | 117 | |
bb70624e JA |
118 | /* Evaluates to 1 if this is one of the shell's special variables. */ |
119 | #define SPECIAL_VAR(name, wi) \ | |
f73dda09 JA |
120 | ((DIGIT (*name) && all_digits (name)) || \ |
121 | (name[1] == '\0' && (sh_syntaxtab[(unsigned char)*name] & CSPECVAR)) || \ | |
28ef6c31 | 122 | (wi && name[2] == '\0' && VALID_INDIR_PARAM (name[1]))) |
bb70624e | 123 | |
f73dda09 JA |
124 | /* An expansion function that takes a string and a quoted flag and returns |
125 | a WORD_LIST *. Used as the type of the third argument to | |
126 | expand_string_if_necessary(). */ | |
127 | typedef WORD_LIST *EXPFUNC __P((char *, int)); | |
128 | ||
726f6388 JA |
129 | /* Process ID of the last command executed within command substitution. */ |
130 | pid_t last_command_subst_pid = NO_PID; | |
b72432fd | 131 | pid_t current_command_subst_pid = NO_PID; |
726f6388 | 132 | |
7117c2d2 JA |
133 | /* Variables used to keep track of the characters in IFS. */ |
134 | SHELL_VAR *ifs_var; | |
135 | char *ifs_value; | |
136 | unsigned char ifs_cmap[UCHAR_MAX + 1]; | |
95732b49 JA |
137 | |
138 | #if defined (HANDLE_MULTIBYTE) | |
139 | unsigned char ifs_firstc[MB_LEN_MAX]; | |
140 | size_t ifs_firstc_len; | |
141 | #else | |
7117c2d2 | 142 | unsigned char ifs_firstc; |
95732b49 | 143 | #endif |
7117c2d2 | 144 | |
0001803f CR |
145 | /* Sentinel to tell when we are performing variable assignments preceding a |
146 | command name and putting them into the environment. Used to make sure | |
147 | we use the temporary environment when looking up variable values. */ | |
3185942a JA |
148 | int assigning_in_environment; |
149 | ||
0001803f CR |
150 | /* Used to hold a list of variable assignments preceding a command. Global |
151 | so the SIGCHLD handler in jobs.c can unwind-protect it when it runs a | |
152 | SIGCHLD trap and so it can be saved and restored by the trap handlers. */ | |
153 | WORD_LIST *subst_assign_varlist = (WORD_LIST *)NULL; | |
154 | ||
726f6388 | 155 | /* Extern functions and variables from different files. */ |
b80f6443 | 156 | extern int last_command_exit_value, last_command_exit_signal; |
0001803f CR |
157 | extern int subshell_environment, line_number; |
158 | extern int subshell_level, parse_and_execute_level, sourcelevel; | |
7117c2d2 | 159 | extern int eof_encountered; |
bb70624e | 160 | extern int return_catch_flag, return_catch_value; |
f73dda09 | 161 | extern pid_t dollar_dollar_pid; |
726f6388 | 162 | extern int posixly_correct; |
726f6388 | 163 | extern char *this_command_name; |
ccc6cda3 | 164 | extern struct fd_bitmap *current_fds_to_close; |
cce855bc | 165 | extern int wordexp_only; |
b80f6443 JA |
166 | extern int expanding_redir; |
167 | extern int tempenv_assign_error; | |
726f6388 | 168 | |
0628567a JA |
169 | #if !defined (HAVE_WCSDUP) && defined (HANDLE_MULTIBYTE) |
170 | extern wchar_t *wcsdup __P((const wchar_t *)); | |
171 | #endif | |
172 | ||
ccc6cda3 JA |
173 | /* Non-zero means to allow unmatched globbed filenames to expand to |
174 | a null file. */ | |
175 | int allow_null_glob_expansion; | |
176 | ||
b80f6443 JA |
177 | /* Non-zero means to throw an error when globbing fails to match anything. */ |
178 | int fail_glob_expansion; | |
179 | ||
f73dda09 | 180 | #if 0 |
ccc6cda3 JA |
181 | /* Variables to keep track of which words in an expanded word list (the |
182 | output of expand_word_list_internal) are the result of globbing | |
f73dda09 JA |
183 | expansions. GLOB_ARGV_FLAGS is used by execute_cmd.c. |
184 | (CURRENTLY UNUSED). */ | |
ccc6cda3 JA |
185 | char *glob_argv_flags; |
186 | static int glob_argv_flags_size; | |
f73dda09 | 187 | #endif |
726f6388 JA |
188 | |
189 | static WORD_LIST expand_word_error, expand_word_fatal; | |
95732b49 | 190 | static WORD_DESC expand_wdesc_error, expand_wdesc_fatal; |
726f6388 | 191 | static char expand_param_error, expand_param_fatal; |
95732b49 | 192 | static char extract_string_error, extract_string_fatal; |
726f6388 | 193 | |
28ef6c31 JA |
194 | /* Tell the expansion functions to not longjmp back to top_level on fatal |
195 | errors. Enabled when doing completion and prompt string expansion. */ | |
196 | static int no_longjmp_on_fatal_error = 0; | |
197 | ||
198 | /* Set by expand_word_unsplit; used to inhibit splitting and re-joining | |
199 | $* on $IFS, primarily when doing assignment statements. */ | |
200 | static int expand_no_split_dollar_star = 0; | |
bb70624e | 201 | |
bb70624e JA |
202 | /* A WORD_LIST of words to be expanded by expand_word_list_internal, |
203 | without any leading variable assignments. */ | |
204 | static WORD_LIST *garglist = (WORD_LIST *)NULL; | |
b72432fd | 205 | |
f73dda09 | 206 | static char *quoted_substring __P((char *, int, int)); |
7117c2d2 JA |
207 | static int quoted_strlen __P((char *)); |
208 | static char *quoted_strchr __P((char *, int, int)); | |
f73dda09 JA |
209 | |
210 | static char *expand_string_if_necessary __P((char *, int, EXPFUNC *)); | |
211 | static inline char *expand_string_to_string_internal __P((char *, int, EXPFUNC *)); | |
212 | static WORD_LIST *call_expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
213 | static WORD_LIST *expand_string_internal __P((char *, int)); | |
214 | static WORD_LIST *expand_string_leave_quoted __P((char *, int)); | |
215 | static WORD_LIST *expand_string_for_rhs __P((char *, int, int *, int *)); | |
216 | ||
f73dda09 JA |
217 | static WORD_LIST *list_quote_escapes __P((WORD_LIST *)); |
218 | static char *make_quoted_char __P((int)); | |
219 | static WORD_LIST *quote_list __P((WORD_LIST *)); | |
f73dda09 JA |
220 | |
221 | static int unquoted_substring __P((char *, char *)); | |
222 | static int unquoted_member __P((int, char *)); | |
223 | ||
95732b49 JA |
224 | #if defined (ARRAY_VARS) |
225 | static SHELL_VAR *do_compound_assignment __P((char *, char *, int)); | |
226 | #endif | |
227 | static int do_assignment_internal __P((const WORD_DESC *, int)); | |
f73dda09 | 228 | |
3185942a | 229 | static char *string_extract_verbatim __P((char *, size_t, int *, char *, int)); |
f73dda09 JA |
230 | static char *string_extract __P((char *, int *, char *, int)); |
231 | static char *string_extract_double_quoted __P((char *, int *, int)); | |
7117c2d2 | 232 | static inline char *string_extract_single_quoted __P((char *, int *)); |
0628567a | 233 | static inline int skip_single_quoted __P((const char *, size_t, int)); |
7117c2d2 JA |
234 | static int skip_double_quoted __P((char *, size_t, int)); |
235 | static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int)); | |
236 | static char *extract_dollar_brace_string __P((char *, int *, int, int)); | |
89a92869 | 237 | static int skip_matched_pair __P((const char *, int, int, int, int)); |
f73dda09 | 238 | |
f73dda09 JA |
239 | static char *pos_params __P((char *, int, int, int)); |
240 | ||
b80f6443 JA |
241 | static unsigned char *mb_getcharlens __P((char *, int)); |
242 | ||
243 | static char *remove_upattern __P((char *, char *, int)); | |
0628567a | 244 | #if defined (HANDLE_MULTIBYTE) |
b80f6443 JA |
245 | static wchar_t *remove_wpattern __P((wchar_t *, size_t, wchar_t *, int)); |
246 | #endif | |
f73dda09 | 247 | static char *remove_pattern __P((char *, char *, int)); |
b80f6443 | 248 | |
b80f6443 JA |
249 | static int match_upattern __P((char *, char *, int, char **, char **)); |
250 | #if defined (HANDLE_MULTIBYTE) | |
b80f6443 JA |
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 |
495aee44 | 262 | static char *parameter_brace_remove_pattern __P((char *, char *, int, char *, int, 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 | |
495aee44 | 276 | static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int, arrayind_t *)); |
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 *)); |
495aee44 | 286 | static int get_var_and_type __P((char *, char *, arrayind_t, int, int, SHELL_VAR **, char **)); |
b80f6443 | 287 | static char *mb_substring __P((char *, int, int)); |
495aee44 CR |
288 | static char *parameter_brace_substring __P((char *, char *, int, char *, int, int)); |
289 | ||
290 | static int shouldexp_replacement __P((char *)); | |
f73dda09 JA |
291 | |
292 | static char *pos_params_pat_subst __P((char *, char *, char *, int)); | |
293 | ||
495aee44 | 294 | static char *parameter_brace_patsub __P((char *, char *, int, char *, int, int)); |
f73dda09 | 295 | |
3185942a | 296 | static char *pos_params_casemod __P((char *, char *, int, int)); |
495aee44 | 297 | static char *parameter_brace_casemod __P((char *, char *, int, int, char *, int, int)); |
3185942a | 298 | |
0001803f | 299 | static WORD_DESC *parameter_brace_expand __P((char *, int *, int, int, int *, int *)); |
95732b49 | 300 | static WORD_DESC *param_expand __P((char *, int *, int, int *, int *, int *, int *, int)); |
f73dda09 JA |
301 | |
302 | static WORD_LIST *expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
303 | ||
f73dda09 JA |
304 | static WORD_LIST *word_list_split __P((WORD_LIST *)); |
305 | ||
b80f6443 JA |
306 | static void exp_jump_to_top_level __P((int)); |
307 | ||
f73dda09 JA |
308 | static WORD_LIST *separate_out_assignments __P((WORD_LIST *)); |
309 | static WORD_LIST *glob_expand_word_list __P((WORD_LIST *, int)); | |
310 | #ifdef BRACE_EXPANSION | |
311 | static WORD_LIST *brace_expand_word_list __P((WORD_LIST *, int)); | |
312 | #endif | |
3185942a JA |
313 | #if defined (ARRAY_VARS) |
314 | static int make_internal_declare __P((char *, char *)); | |
315 | #endif | |
f73dda09 JA |
316 | static WORD_LIST *shell_expand_word_list __P((WORD_LIST *, int)); |
317 | static WORD_LIST *expand_word_list_internal __P((WORD_LIST *, int)); | |
726f6388 JA |
318 | |
319 | /* **************************************************************** */ | |
320 | /* */ | |
321 | /* Utility Functions */ | |
322 | /* */ | |
323 | /* **************************************************************** */ | |
324 | ||
0001803f CR |
325 | #if defined (DEBUG) |
326 | void | |
327 | dump_word_flags (flags) | |
328 | int flags; | |
329 | { | |
330 | int f; | |
331 | ||
332 | f = flags; | |
333 | fprintf (stderr, "%d -> ", f); | |
334 | if (f & W_ASSIGNASSOC) | |
335 | { | |
336 | f &= ~W_ASSIGNASSOC; | |
337 | fprintf (stderr, "W_ASSIGNASSOC%s", f ? "|" : ""); | |
338 | } | |
339 | if (f & W_HASCTLESC) | |
340 | { | |
341 | f &= ~W_HASCTLESC; | |
342 | fprintf (stderr, "W_HASCTLESC%s", f ? "|" : ""); | |
343 | } | |
344 | if (f & W_NOPROCSUB) | |
345 | { | |
346 | f &= ~W_NOPROCSUB; | |
347 | fprintf (stderr, "W_NOPROCSUB%s", f ? "|" : ""); | |
348 | } | |
349 | if (f & W_DQUOTE) | |
350 | { | |
351 | f &= ~W_DQUOTE; | |
352 | fprintf (stderr, "W_DQUOTE%s", f ? "|" : ""); | |
353 | } | |
354 | if (f & W_HASQUOTEDNULL) | |
355 | { | |
356 | f &= ~W_HASQUOTEDNULL; | |
357 | fprintf (stderr, "W_HASQUOTEDNULL%s", f ? "|" : ""); | |
358 | } | |
359 | if (f & W_ASSIGNARG) | |
360 | { | |
361 | f &= ~W_ASSIGNARG; | |
362 | fprintf (stderr, "W_ASSIGNARG%s", f ? "|" : ""); | |
363 | } | |
364 | if (f & W_ASSNBLTIN) | |
365 | { | |
366 | f &= ~W_ASSNBLTIN; | |
367 | fprintf (stderr, "W_ASSNBLTIN%s", f ? "|" : ""); | |
368 | } | |
6f5ac32d CR |
369 | if (f & W_ASSNGLOBAL) |
370 | { | |
371 | f &= ~W_ASSNGLOBAL; | |
372 | fprintf (stderr, "W_ASSNGLOBAL%s", f ? "|" : ""); | |
373 | } | |
0001803f CR |
374 | if (f & W_COMPASSIGN) |
375 | { | |
376 | f &= ~W_COMPASSIGN; | |
377 | fprintf (stderr, "W_COMPASSIGN%s", f ? "|" : ""); | |
378 | } | |
379 | if (f & W_NOEXPAND) | |
380 | { | |
381 | f &= ~W_NOEXPAND; | |
382 | fprintf (stderr, "W_NOEXPAND%s", f ? "|" : ""); | |
383 | } | |
384 | if (f & W_ITILDE) | |
385 | { | |
386 | f &= ~W_ITILDE; | |
387 | fprintf (stderr, "W_ITILDE%s", f ? "|" : ""); | |
388 | } | |
389 | if (f & W_NOTILDE) | |
390 | { | |
391 | f &= ~W_NOTILDE; | |
392 | fprintf (stderr, "W_NOTILDE%s", f ? "|" : ""); | |
393 | } | |
394 | if (f & W_ASSIGNRHS) | |
395 | { | |
396 | f &= ~W_ASSIGNRHS; | |
397 | fprintf (stderr, "W_ASSIGNRHS%s", f ? "|" : ""); | |
398 | } | |
399 | if (f & W_NOCOMSUB) | |
400 | { | |
401 | f &= ~W_NOCOMSUB; | |
402 | fprintf (stderr, "W_NOCOMSUB%s", f ? "|" : ""); | |
403 | } | |
404 | if (f & W_DOLLARSTAR) | |
405 | { | |
406 | f &= ~W_DOLLARSTAR; | |
407 | fprintf (stderr, "W_DOLLARSTAR%s", f ? "|" : ""); | |
408 | } | |
409 | if (f & W_DOLLARAT) | |
410 | { | |
411 | f &= ~W_DOLLARAT; | |
412 | fprintf (stderr, "W_DOLLARAT%s", f ? "|" : ""); | |
413 | } | |
414 | if (f & W_TILDEEXP) | |
415 | { | |
416 | f &= ~W_TILDEEXP; | |
417 | fprintf (stderr, "W_TILDEEXP%s", f ? "|" : ""); | |
418 | } | |
419 | if (f & W_NOSPLIT2) | |
420 | { | |
421 | f &= ~W_NOSPLIT2; | |
422 | fprintf (stderr, "W_NOSPLIT2%s", f ? "|" : ""); | |
423 | } | |
424 | if (f & W_NOGLOB) | |
425 | { | |
426 | f &= ~W_NOGLOB; | |
427 | fprintf (stderr, "W_NOGLOB%s", f ? "|" : ""); | |
428 | } | |
429 | if (f & W_NOSPLIT) | |
430 | { | |
431 | f &= ~W_NOSPLIT; | |
432 | fprintf (stderr, "W_NOSPLIT%s", f ? "|" : ""); | |
433 | } | |
434 | if (f & W_GLOBEXP) | |
435 | { | |
436 | f &= ~W_GLOBEXP; | |
437 | fprintf (stderr, "W_GLOBEXP%s", f ? "|" : ""); | |
438 | } | |
439 | if (f & W_ASSIGNMENT) | |
440 | { | |
441 | f &= ~W_ASSIGNMENT; | |
442 | fprintf (stderr, "W_ASSIGNMENT%s", f ? "|" : ""); | |
443 | } | |
444 | if (f & W_QUOTED) | |
445 | { | |
446 | f &= ~W_QUOTED; | |
447 | fprintf (stderr, "W_QUOTED%s", f ? "|" : ""); | |
448 | } | |
449 | if (f & W_HASDOLLAR) | |
450 | { | |
451 | f &= ~W_HASDOLLAR; | |
452 | fprintf (stderr, "W_HASDOLLAR%s", f ? "|" : ""); | |
453 | } | |
454 | fprintf (stderr, "\n"); | |
455 | fflush (stderr); | |
456 | } | |
457 | #endif | |
458 | ||
7117c2d2 | 459 | #ifdef INCLUDE_UNUSED |
ccc6cda3 JA |
460 | static char * |
461 | quoted_substring (string, start, end) | |
462 | char *string; | |
463 | int start, end; | |
464 | { | |
465 | register int len, l; | |
466 | register char *result, *s, *r; | |
467 | ||
468 | len = end - start; | |
469 | ||
470 | /* Move to string[start], skipping quoted characters. */ | |
471 | for (s = string, l = 0; *s && l < start; ) | |
472 | { | |
473 | if (*s == CTLESC) | |
474 | { | |
28ef6c31 JA |
475 | s++; |
476 | continue; | |
ccc6cda3 JA |
477 | } |
478 | l++; | |
479 | if (*s == 0) | |
28ef6c31 | 480 | break; |
ccc6cda3 JA |
481 | } |
482 | ||
f73dda09 | 483 | r = result = (char *)xmalloc (2*len + 1); /* save room for quotes */ |
ccc6cda3 JA |
484 | |
485 | /* Copy LEN characters, including quote characters. */ | |
486 | s = string + l; | |
487 | for (l = 0; l < len; s++) | |
488 | { | |
489 | if (*s == CTLESC) | |
28ef6c31 | 490 | *r++ = *s++; |
ccc6cda3 JA |
491 | *r++ = *s; |
492 | l++; | |
493 | if (*s == 0) | |
28ef6c31 | 494 | break; |
ccc6cda3 JA |
495 | } |
496 | *r = '\0'; | |
497 | return result; | |
498 | } | |
7117c2d2 JA |
499 | #endif |
500 | ||
501 | #ifdef INCLUDE_UNUSED | |
502 | /* Return the length of S, skipping over quoted characters */ | |
503 | static int | |
504 | quoted_strlen (s) | |
505 | char *s; | |
506 | { | |
507 | register char *p; | |
508 | int i; | |
509 | ||
510 | i = 0; | |
511 | for (p = s; *p; p++) | |
512 | { | |
513 | if (*p == CTLESC) | |
514 | { | |
515 | p++; | |
516 | if (*p == 0) | |
517 | return (i + 1); | |
518 | } | |
519 | i++; | |
520 | } | |
521 | ||
522 | return i; | |
523 | } | |
524 | #endif | |
ccc6cda3 JA |
525 | |
526 | /* Find the first occurrence of character C in string S, obeying shell | |
527 | quoting rules. If (FLAGS & ST_BACKSL) is non-zero, backslash-escaped | |
528 | characters are skipped. If (FLAGS & ST_CTLESC) is non-zero, characters | |
529 | escaped with CTLESC are skipped. */ | |
7117c2d2 | 530 | static char * |
ccc6cda3 JA |
531 | quoted_strchr (s, c, flags) |
532 | char *s; | |
533 | int c, flags; | |
534 | { | |
535 | register char *p; | |
536 | ||
537 | for (p = s; *p; p++) | |
538 | { | |
539 | if (((flags & ST_BACKSL) && *p == '\\') | |
540 | || ((flags & ST_CTLESC) && *p == CTLESC)) | |
541 | { | |
542 | p++; | |
543 | if (*p == '\0') | |
544 | return ((char *)NULL); | |
545 | continue; | |
546 | } | |
547 | else if (*p == c) | |
548 | return p; | |
549 | } | |
550 | return ((char *)NULL); | |
551 | } | |
552 | ||
cce855bc | 553 | /* Return 1 if CHARACTER appears in an unquoted portion of |
7117c2d2 | 554 | STRING. Return 0 otherwise. CHARACTER must be a single-byte character. */ |
cce855bc JA |
555 | static int |
556 | unquoted_member (character, string) | |
557 | int character; | |
726f6388 JA |
558 | char *string; |
559 | { | |
7117c2d2 | 560 | size_t slen; |
cce855bc | 561 | int sindex, c; |
7117c2d2 | 562 | DECLARE_MBSTATE; |
726f6388 | 563 | |
7117c2d2 JA |
564 | slen = strlen (string); |
565 | sindex = 0; | |
566 | while (c = string[sindex]) | |
726f6388 | 567 | { |
cce855bc JA |
568 | if (c == character) |
569 | return (1); | |
570 | ||
571 | switch (c) | |
ccc6cda3 | 572 | { |
cce855bc | 573 | default: |
7117c2d2 | 574 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
575 | break; |
576 | ||
577 | case '\\': | |
578 | sindex++; | |
579 | if (string[sindex]) | |
7117c2d2 | 580 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
581 | break; |
582 | ||
583 | case '\'': | |
7117c2d2 | 584 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
585 | break; |
586 | ||
587 | case '"': | |
7117c2d2 | 588 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc | 589 | break; |
ccc6cda3 | 590 | } |
726f6388 | 591 | } |
cce855bc | 592 | return (0); |
726f6388 JA |
593 | } |
594 | ||
cce855bc JA |
595 | /* Return 1 if SUBSTR appears in an unquoted portion of STRING. */ |
596 | static int | |
597 | unquoted_substring (substr, string) | |
598 | char *substr, *string; | |
726f6388 | 599 | { |
7117c2d2 | 600 | size_t slen; |
cce855bc | 601 | int sindex, c, sublen; |
7117c2d2 | 602 | DECLARE_MBSTATE; |
726f6388 | 603 | |
cce855bc JA |
604 | if (substr == 0 || *substr == '\0') |
605 | return (0); | |
606 | ||
7117c2d2 | 607 | slen = strlen (string); |
cce855bc JA |
608 | sublen = strlen (substr); |
609 | for (sindex = 0; c = string[sindex]; ) | |
726f6388 | 610 | { |
cce855bc JA |
611 | if (STREQN (string + sindex, substr, sublen)) |
612 | return (1); | |
613 | ||
614 | switch (c) | |
615 | { | |
616 | case '\\': | |
617 | sindex++; | |
cce855bc | 618 | if (string[sindex]) |
7117c2d2 | 619 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
620 | break; |
621 | ||
622 | case '\'': | |
7117c2d2 | 623 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
624 | break; |
625 | ||
626 | case '"': | |
7117c2d2 | 627 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc JA |
628 | break; |
629 | ||
630 | default: | |
7117c2d2 | 631 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
632 | break; |
633 | } | |
726f6388 | 634 | } |
cce855bc | 635 | return (0); |
ccc6cda3 | 636 | } |
726f6388 | 637 | |
cce855bc JA |
638 | /* Most of the substitutions must be done in parallel. In order |
639 | to avoid using tons of unclear goto's, I have some functions | |
640 | for manipulating malloc'ed strings. They all take INDX, a | |
641 | pointer to an integer which is the offset into the string | |
642 | where manipulation is taking place. They also take SIZE, a | |
643 | pointer to an integer which is the current length of the | |
644 | character array for this string. */ | |
726f6388 | 645 | |
cce855bc JA |
646 | /* Append SOURCE to TARGET at INDEX. SIZE is the current amount |
647 | of space allocated to TARGET. SOURCE can be NULL, in which | |
648 | case nothing happens. Gets rid of SOURCE by freeing it. | |
649 | Returns TARGET in case the location has changed. */ | |
7117c2d2 | 650 | INLINE char * |
cce855bc JA |
651 | sub_append_string (source, target, indx, size) |
652 | char *source, *target; | |
653 | int *indx, *size; | |
654 | { | |
655 | if (source) | |
726f6388 | 656 | { |
cce855bc JA |
657 | int srclen, n; |
658 | ||
659 | srclen = STRLEN (source); | |
660 | if (srclen >= (int)(*size - *indx)) | |
726f6388 | 661 | { |
cce855bc JA |
662 | n = srclen + *indx; |
663 | n = (n + DEFAULT_ARRAY_SIZE) - (n % DEFAULT_ARRAY_SIZE); | |
f73dda09 | 664 | target = (char *)xrealloc (target, (*size = n)); |
726f6388 | 665 | } |
cce855bc JA |
666 | |
667 | FASTCOPY (source, target + *indx, srclen); | |
668 | *indx += srclen; | |
669 | target[*indx] = '\0'; | |
670 | ||
671 | free (source); | |
726f6388 | 672 | } |
cce855bc JA |
673 | return (target); |
674 | } | |
675 | ||
676 | #if 0 | |
677 | /* UNUSED */ | |
678 | /* Append the textual representation of NUMBER to TARGET. | |
679 | INDX and SIZE are as in SUB_APPEND_STRING. */ | |
680 | char * | |
681 | sub_append_number (number, target, indx, size) | |
7117c2d2 | 682 | intmax_t number; |
f73dda09 | 683 | int *indx, *size; |
cce855bc JA |
684 | char *target; |
685 | { | |
686 | char *temp; | |
687 | ||
688 | temp = itos (number); | |
689 | return (sub_append_string (temp, target, indx, size)); | |
726f6388 | 690 | } |
d166f048 | 691 | #endif |
726f6388 JA |
692 | |
693 | /* Extract a substring from STRING, starting at SINDEX and ending with | |
694 | one of the characters in CHARLIST. Don't make the ending character | |
695 | part of the string. Leave SINDEX pointing at the ending character. | |
3185942a | 696 | Understand about backslashes in the string. If (flags & SX_VARNAME) |
7117c2d2 JA |
697 | is non-zero, and array variables have been compiled into the shell, |
698 | everything between a `[' and a corresponding `]' is skipped over. | |
3185942a JA |
699 | If (flags & SX_NOALLOC) is non-zero, don't return the substring, just |
700 | update SINDEX. If (flags & SX_REQMATCH) is non-zero, the string must | |
95732b49 | 701 | contain a closing character from CHARLIST. */ |
726f6388 | 702 | static char * |
7117c2d2 | 703 | string_extract (string, sindex, charlist, flags) |
f73dda09 JA |
704 | char *string; |
705 | int *sindex; | |
706 | char *charlist; | |
7117c2d2 | 707 | int flags; |
726f6388 | 708 | { |
ccc6cda3 | 709 | register int c, i; |
95732b49 | 710 | int found; |
7117c2d2 | 711 | size_t slen; |
726f6388 | 712 | char *temp; |
7117c2d2 | 713 | DECLARE_MBSTATE; |
726f6388 | 714 | |
95732b49 | 715 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; |
7117c2d2 | 716 | i = *sindex; |
95732b49 | 717 | found = 0; |
7117c2d2 | 718 | while (c = string[i]) |
726f6388 JA |
719 | { |
720 | if (c == '\\') | |
7117c2d2 JA |
721 | { |
722 | if (string[i + 1]) | |
723 | i++; | |
724 | else | |
725 | break; | |
726 | } | |
ccc6cda3 | 727 | #if defined (ARRAY_VARS) |
3185942a | 728 | else if ((flags & SX_VARNAME) && c == '[') |
ccc6cda3 JA |
729 | { |
730 | int ni; | |
731 | /* If this is an array subscript, skip over it and continue. */ | |
0001803f | 732 | ni = skipsubscript (string, i, 0); |
ccc6cda3 JA |
733 | if (string[ni] == ']') |
734 | i = ni; | |
735 | } | |
736 | #endif | |
737 | else if (MEMBER (c, charlist)) | |
95732b49 JA |
738 | { |
739 | found = 1; | |
726f6388 | 740 | break; |
95732b49 | 741 | } |
7117c2d2 JA |
742 | |
743 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 744 | } |
bb70624e | 745 | |
95732b49 JA |
746 | /* If we had to have a matching delimiter and didn't find one, return an |
747 | error and let the caller deal with it. */ | |
3185942a | 748 | if ((flags & SX_REQMATCH) && found == 0) |
95732b49 JA |
749 | { |
750 | *sindex = i; | |
751 | return (&extract_string_error); | |
752 | } | |
753 | ||
3185942a | 754 | temp = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 | 755 | *sindex = i; |
95732b49 | 756 | |
726f6388 JA |
757 | return (temp); |
758 | } | |
759 | ||
ccc6cda3 JA |
760 | /* Extract the contents of STRING as if it is enclosed in double quotes. |
761 | SINDEX, when passed in, is the offset of the character immediately | |
762 | following the opening double quote; on exit, SINDEX is left pointing after | |
763 | the closing double quote. If STRIPDQ is non-zero, unquoted double | |
764 | quotes are stripped and the string is terminated by a null byte. | |
765 | Backslashes between the embedded double quotes are processed. If STRIPDQ | |
766 | is zero, an unquoted `"' terminates the string. */ | |
7117c2d2 | 767 | static char * |
ccc6cda3 | 768 | string_extract_double_quoted (string, sindex, stripdq) |
726f6388 | 769 | char *string; |
ccc6cda3 | 770 | int *sindex, stripdq; |
726f6388 | 771 | { |
7117c2d2 JA |
772 | size_t slen; |
773 | char *send; | |
f73dda09 JA |
774 | int j, i, t; |
775 | unsigned char c; | |
ccc6cda3 JA |
776 | char *temp, *ret; /* The new string we return. */ |
777 | int pass_next, backquote, si; /* State variables for the machine. */ | |
778 | int dquote; | |
7117c2d2 JA |
779 | DECLARE_MBSTATE; |
780 | ||
781 | slen = strlen (string + *sindex) + *sindex; | |
782 | send = string + slen; | |
726f6388 | 783 | |
ccc6cda3 | 784 | pass_next = backquote = dquote = 0; |
7117c2d2 | 785 | temp = (char *)xmalloc (1 + slen - *sindex); |
726f6388 | 786 | |
7117c2d2 JA |
787 | j = 0; |
788 | i = *sindex; | |
789 | while (c = string[i]) | |
726f6388 | 790 | { |
ccc6cda3 JA |
791 | /* Process a character that was quoted by a backslash. */ |
792 | if (pass_next) | |
726f6388 | 793 | { |
495aee44 | 794 | /* XXX - take another look at this in light of Interp 221 */ |
ccc6cda3 | 795 | /* Posix.2 sez: |
726f6388 | 796 | |
ccc6cda3 JA |
797 | ``The backslash shall retain its special meaning as an escape |
798 | character only when followed by one of the characters: | |
7117c2d2 | 799 | $ ` " \ <newline>''. |
726f6388 | 800 | |
ccc6cda3 JA |
801 | If STRIPDQ is zero, we handle the double quotes here and let |
802 | expand_word_internal handle the rest. If STRIPDQ is non-zero, | |
803 | we have already been through one round of backslash stripping, | |
804 | and want to strip these backslashes only if DQUOTE is non-zero, | |
805 | indicating that we are inside an embedded double-quoted string. */ | |
806 | ||
807 | /* If we are in an embedded quoted string, then don't strip | |
808 | backslashes before characters for which the backslash | |
809 | retains its special meaning, but remove backslashes in | |
810 | front of other characters. If we are not in an | |
811 | embedded quoted string, don't strip backslashes at all. | |
812 | This mess is necessary because the string was already | |
813 | surrounded by double quotes (and sh has some really weird | |
814 | quoting rules). | |
815 | The returned string will be run through expansion as if | |
816 | it were double-quoted. */ | |
817 | if ((stripdq == 0 && c != '"') || | |
28ef6c31 | 818 | (stripdq && ((dquote && (sh_syntaxtab[c] & CBSDQUOTE)) || dquote == 0))) |
ccc6cda3 | 819 | temp[j++] = '\\'; |
ccc6cda3 | 820 | pass_next = 0; |
7117c2d2 JA |
821 | |
822 | add_one_character: | |
823 | COPY_CHAR_I (temp, j, string, send, i); | |
ccc6cda3 JA |
824 | continue; |
825 | } | |
726f6388 | 826 | |
ccc6cda3 JA |
827 | /* A backslash protects the next character. The code just above |
828 | handles preserving the backslash in front of any character but | |
829 | a double quote. */ | |
830 | if (c == '\\') | |
726f6388 | 831 | { |
ccc6cda3 | 832 | pass_next++; |
7117c2d2 | 833 | i++; |
726f6388 JA |
834 | continue; |
835 | } | |
836 | ||
ccc6cda3 JA |
837 | /* Inside backquotes, ``the portion of the quoted string from the |
838 | initial backquote and the characters up to the next backquote | |
839 | that is not preceded by a backslash, having escape characters | |
840 | removed, defines that command''. */ | |
841 | if (backquote) | |
726f6388 | 842 | { |
ccc6cda3 JA |
843 | if (c == '`') |
844 | backquote = 0; | |
845 | temp[j++] = c; | |
7117c2d2 | 846 | i++; |
726f6388 JA |
847 | continue; |
848 | } | |
849 | ||
ccc6cda3 | 850 | if (c == '`') |
726f6388 | 851 | { |
ccc6cda3 JA |
852 | temp[j++] = c; |
853 | backquote++; | |
7117c2d2 | 854 | i++; |
ccc6cda3 | 855 | continue; |
726f6388 JA |
856 | } |
857 | ||
ccc6cda3 JA |
858 | /* Pass everything between `$(' and the matching `)' or a quoted |
859 | ${ ... } pair through according to the Posix.2 specification. */ | |
cce855bc | 860 | if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
726f6388 | 861 | { |
b80f6443 JA |
862 | int free_ret = 1; |
863 | ||
ccc6cda3 | 864 | si = i + 2; |
cce855bc | 865 | if (string[i + 1] == LPAREN) |
3185942a | 866 | ret = extract_command_subst (string, &si, 0); |
ccc6cda3 | 867 | else |
495aee44 | 868 | ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, 0); |
726f6388 | 869 | |
ccc6cda3 JA |
870 | temp[j++] = '$'; |
871 | temp[j++] = string[i + 1]; | |
726f6388 | 872 | |
b80f6443 JA |
873 | /* Just paranoia; ret will not be 0 unless no_longjmp_on_fatal_error |
874 | is set. */ | |
875 | if (ret == 0 && no_longjmp_on_fatal_error) | |
876 | { | |
877 | free_ret = 0; | |
878 | ret = string + i + 2; | |
879 | } | |
880 | ||
ccc6cda3 JA |
881 | for (t = 0; ret[t]; t++, j++) |
882 | temp[j] = ret[t]; | |
b80f6443 | 883 | temp[j] = string[si]; |
726f6388 | 884 | |
b80f6443 JA |
885 | if (string[si]) |
886 | { | |
887 | j++; | |
888 | i = si + 1; | |
889 | } | |
890 | else | |
891 | i = si; | |
892 | ||
893 | if (free_ret) | |
894 | free (ret); | |
ccc6cda3 | 895 | continue; |
726f6388 JA |
896 | } |
897 | ||
ccc6cda3 | 898 | /* Add any character but a double quote to the quoted string we're |
28ef6c31 | 899 | accumulating. */ |
ccc6cda3 | 900 | if (c != '"') |
7117c2d2 | 901 | goto add_one_character; |
ccc6cda3 JA |
902 | |
903 | /* c == '"' */ | |
904 | if (stripdq) | |
726f6388 | 905 | { |
ccc6cda3 | 906 | dquote ^= 1; |
7117c2d2 | 907 | i++; |
ccc6cda3 | 908 | continue; |
726f6388 | 909 | } |
ccc6cda3 JA |
910 | |
911 | break; | |
726f6388 | 912 | } |
ccc6cda3 | 913 | temp[j] = '\0'; |
726f6388 | 914 | |
ccc6cda3 JA |
915 | /* Point to after the closing quote. */ |
916 | if (c) | |
917 | i++; | |
726f6388 JA |
918 | *sindex = i; |
919 | ||
ccc6cda3 JA |
920 | return (temp); |
921 | } | |
922 | ||
923 | /* This should really be another option to string_extract_double_quoted. */ | |
f73dda09 | 924 | static int |
7117c2d2 | 925 | skip_double_quoted (string, slen, sind) |
ccc6cda3 | 926 | char *string; |
7117c2d2 | 927 | size_t slen; |
ccc6cda3 JA |
928 | int sind; |
929 | { | |
f73dda09 | 930 | int c, i; |
ccc6cda3 JA |
931 | char *ret; |
932 | int pass_next, backquote, si; | |
7117c2d2 | 933 | DECLARE_MBSTATE; |
ccc6cda3 JA |
934 | |
935 | pass_next = backquote = 0; | |
7117c2d2 JA |
936 | i = sind; |
937 | while (c = string[i]) | |
726f6388 | 938 | { |
ccc6cda3 JA |
939 | if (pass_next) |
940 | { | |
941 | pass_next = 0; | |
7117c2d2 | 942 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
943 | continue; |
944 | } | |
945 | else if (c == '\\') | |
946 | { | |
947 | pass_next++; | |
7117c2d2 | 948 | i++; |
ccc6cda3 JA |
949 | continue; |
950 | } | |
951 | else if (backquote) | |
952 | { | |
953 | if (c == '`') | |
954 | backquote = 0; | |
7117c2d2 | 955 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
956 | continue; |
957 | } | |
958 | else if (c == '`') | |
959 | { | |
960 | backquote++; | |
7117c2d2 | 961 | i++; |
ccc6cda3 JA |
962 | continue; |
963 | } | |
cce855bc | 964 | else if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
ccc6cda3 JA |
965 | { |
966 | si = i + 2; | |
cce855bc | 967 | if (string[i + 1] == LPAREN) |
3185942a | 968 | ret = extract_command_subst (string, &si, SX_NOALLOC); |
ccc6cda3 | 969 | else |
495aee44 | 970 | ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, SX_NOALLOC); |
ccc6cda3 | 971 | |
7117c2d2 | 972 | i = si + 1; |
ccc6cda3 JA |
973 | continue; |
974 | } | |
975 | else if (c != '"') | |
7117c2d2 JA |
976 | { |
977 | ADVANCE_CHAR (string, slen, i); | |
978 | continue; | |
979 | } | |
ccc6cda3 JA |
980 | else |
981 | break; | |
726f6388 | 982 | } |
ccc6cda3 JA |
983 | |
984 | if (c) | |
985 | i++; | |
986 | ||
987 | return (i); | |
726f6388 JA |
988 | } |
989 | ||
ccc6cda3 JA |
990 | /* Extract the contents of STRING as if it is enclosed in single quotes. |
991 | SINDEX, when passed in, is the offset of the character immediately | |
992 | following the opening single quote; on exit, SINDEX is left pointing after | |
993 | the closing single quote. */ | |
994 | static inline char * | |
995 | string_extract_single_quoted (string, sindex) | |
996 | char *string; | |
997 | int *sindex; | |
998 | { | |
f73dda09 | 999 | register int i; |
7117c2d2 | 1000 | size_t slen; |
ccc6cda3 | 1001 | char *t; |
7117c2d2 | 1002 | DECLARE_MBSTATE; |
ccc6cda3 | 1003 | |
95732b49 JA |
1004 | /* Don't need slen for ADVANCE_CHAR unless multibyte chars possible. */ |
1005 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; | |
7117c2d2 JA |
1006 | i = *sindex; |
1007 | while (string[i] && string[i] != '\'') | |
1008 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 | 1009 | |
bb70624e | 1010 | t = substring (string, *sindex, i); |
ccc6cda3 JA |
1011 | |
1012 | if (string[i]) | |
1013 | i++; | |
1014 | *sindex = i; | |
1015 | ||
1016 | return (t); | |
1017 | } | |
1018 | ||
1019 | static inline int | |
7117c2d2 | 1020 | skip_single_quoted (string, slen, sind) |
0628567a | 1021 | const char *string; |
7117c2d2 | 1022 | size_t slen; |
ccc6cda3 JA |
1023 | int sind; |
1024 | { | |
28ef6c31 | 1025 | register int c; |
7117c2d2 JA |
1026 | DECLARE_MBSTATE; |
1027 | ||
1028 | c = sind; | |
1029 | while (string[c] && string[c] != '\'') | |
1030 | ADVANCE_CHAR (string, slen, c); | |
ccc6cda3 | 1031 | |
28ef6c31 JA |
1032 | if (string[c]) |
1033 | c++; | |
1034 | return c; | |
ccc6cda3 JA |
1035 | } |
1036 | ||
1037 | /* Just like string_extract, but doesn't hack backslashes or any of | |
bb70624e | 1038 | that other stuff. Obeys CTLESC quoting. Used to do splitting on $IFS. */ |
726f6388 | 1039 | static char * |
3185942a | 1040 | string_extract_verbatim (string, slen, sindex, charlist, flags) |
f73dda09 | 1041 | char *string; |
95732b49 | 1042 | size_t slen; |
ccc6cda3 | 1043 | int *sindex; |
f73dda09 | 1044 | char *charlist; |
3185942a | 1045 | int flags; |
ccc6cda3 | 1046 | { |
0001803f | 1047 | register int i; |
95732b49 JA |
1048 | #if defined (HANDLE_MULTIBYTE) |
1049 | size_t clen; | |
1050 | wchar_t *wcharlist; | |
1051 | #endif | |
ccc6cda3 JA |
1052 | int c; |
1053 | char *temp; | |
95732b49 | 1054 | DECLARE_MBSTATE; |
ccc6cda3 JA |
1055 | |
1056 | if (charlist[0] == '\'' && charlist[1] == '\0') | |
1057 | { | |
1058 | temp = string_extract_single_quoted (string, sindex); | |
1059 | --*sindex; /* leave *sindex at separator character */ | |
1060 | return temp; | |
1061 | } | |
1062 | ||
95732b49 JA |
1063 | i = *sindex; |
1064 | #if 0 | |
1065 | /* See how the MBLEN and ADVANCE_CHAR macros work to understand why we need | |
1066 | this only if MB_CUR_MAX > 1. */ | |
1067 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 1; | |
1068 | #endif | |
1069 | #if defined (HANDLE_MULTIBYTE) | |
1070 | clen = strlen (charlist); | |
1071 | wcharlist = 0; | |
1072 | #endif | |
1073 | while (c = string[i]) | |
ccc6cda3 | 1074 | { |
95732b49 JA |
1075 | #if defined (HANDLE_MULTIBYTE) |
1076 | size_t mblength; | |
1077 | #endif | |
3185942a JA |
1078 | if ((flags & SX_NOCTLESC) == 0 && c == CTLESC) |
1079 | { | |
1080 | i += 2; | |
1081 | continue; | |
1082 | } | |
1083 | /* Even if flags contains SX_NOCTLESC, we let CTLESC quoting CTLNUL | |
1084 | through, to protect the CTLNULs from later calls to | |
1085 | remove_quoted_nulls. */ | |
1086 | else if ((flags & SX_NOESCCTLNUL) == 0 && c == CTLESC && string[i+1] == CTLNUL) | |
ccc6cda3 | 1087 | { |
95732b49 | 1088 | i += 2; |
ccc6cda3 JA |
1089 | continue; |
1090 | } | |
1091 | ||
95732b49 JA |
1092 | #if defined (HANDLE_MULTIBYTE) |
1093 | mblength = MBLEN (string + i, slen - i); | |
1094 | if (mblength > 1) | |
1095 | { | |
1096 | wchar_t wc; | |
1097 | mblength = mbtowc (&wc, string + i, slen - i); | |
1098 | if (MB_INVALIDCH (mblength)) | |
1099 | { | |
1100 | if (MEMBER (c, charlist)) | |
1101 | break; | |
1102 | } | |
1103 | else | |
1104 | { | |
1105 | if (wcharlist == 0) | |
1106 | { | |
1107 | size_t len; | |
1108 | len = mbstowcs (wcharlist, charlist, 0); | |
1109 | if (len == -1) | |
1110 | len = 0; | |
0628567a JA |
1111 | wcharlist = (wchar_t *)xmalloc (sizeof (wchar_t) * (len + 1)); |
1112 | mbstowcs (wcharlist, charlist, len + 1); | |
95732b49 JA |
1113 | } |
1114 | ||
1115 | if (wcschr (wcharlist, wc)) | |
1116 | break; | |
1117 | } | |
1118 | } | |
1119 | else | |
1120 | #endif | |
ccc6cda3 JA |
1121 | if (MEMBER (c, charlist)) |
1122 | break; | |
95732b49 JA |
1123 | |
1124 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 JA |
1125 | } |
1126 | ||
95732b49 JA |
1127 | #if defined (HANDLE_MULTIBYTE) |
1128 | FREE (wcharlist); | |
1129 | #endif | |
1130 | ||
bb70624e | 1131 | temp = substring (string, *sindex, i); |
ccc6cda3 JA |
1132 | *sindex = i; |
1133 | ||
1134 | return (temp); | |
1135 | } | |
1136 | ||
1137 | /* Extract the $( construct in STRING, and return a new string. | |
1138 | Start extracting at (SINDEX) as if we had just seen "$(". | |
3185942a | 1139 | Make (SINDEX) get the position of the matching ")". ) |
0001803f | 1140 | XFLAGS is additional flags to pass to other extraction functions. */ |
ccc6cda3 | 1141 | char * |
3185942a | 1142 | extract_command_subst (string, sindex, xflags) |
726f6388 JA |
1143 | char *string; |
1144 | int *sindex; | |
3185942a | 1145 | int xflags; |
726f6388 | 1146 | { |
0001803f | 1147 | if (string[*sindex] == LPAREN) |
3185942a JA |
1148 | return (extract_delimited_string (string, sindex, "$(", "(", ")", xflags|SX_COMMAND)); /*)*/ |
1149 | else | |
1150 | { | |
1151 | xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0); | |
1152 | return (xparse_dolparen (string, string+*sindex, sindex, xflags)); | |
1153 | } | |
ccc6cda3 JA |
1154 | } |
1155 | ||
28ef6c31 | 1156 | /* Extract the $[ construct in STRING, and return a new string. (]) |
ccc6cda3 JA |
1157 | Start extracting at (SINDEX) as if we had just seen "$[". |
1158 | Make (SINDEX) get the position of the matching "]". */ | |
1159 | char * | |
1160 | extract_arithmetic_subst (string, sindex) | |
1161 | char *string; | |
1162 | int *sindex; | |
1163 | { | |
7117c2d2 | 1164 | return (extract_delimited_string (string, sindex, "$[", "[", "]", 0)); /*]*/ |
ccc6cda3 JA |
1165 | } |
1166 | ||
1167 | #if defined (PROCESS_SUBSTITUTION) | |
1168 | /* Extract the <( or >( construct in STRING, and return a new string. | |
1169 | Start extracting at (SINDEX) as if we had just seen "<(". | |
cce855bc | 1170 | Make (SINDEX) get the position of the matching ")". */ /*))*/ |
ccc6cda3 JA |
1171 | char * |
1172 | extract_process_subst (string, starter, sindex) | |
1173 | char *string; | |
1174 | char *starter; | |
1175 | int *sindex; | |
1176 | { | |
7117c2d2 | 1177 | return (extract_delimited_string (string, sindex, starter, "(", ")", 0)); |
ccc6cda3 JA |
1178 | } |
1179 | #endif /* PROCESS_SUBSTITUTION */ | |
1180 | ||
1181 | #if defined (ARRAY_VARS) | |
95732b49 JA |
1182 | /* This can be fooled by unquoted right parens in the passed string. If |
1183 | each caller verifies that the last character in STRING is a right paren, | |
1184 | we don't even need to call extract_delimited_string. */ | |
ccc6cda3 JA |
1185 | char * |
1186 | extract_array_assignment_list (string, sindex) | |
1187 | char *string; | |
1188 | int *sindex; | |
1189 | { | |
95732b49 JA |
1190 | int slen; |
1191 | char *ret; | |
1192 | ||
1193 | slen = strlen (string); /* ( */ | |
1194 | if (string[slen - 1] == ')') | |
1195 | { | |
1196 | ret = substring (string, *sindex, slen - 1); | |
1197 | *sindex = slen - 1; | |
1198 | return ret; | |
1199 | } | |
1200 | return 0; | |
ccc6cda3 JA |
1201 | } |
1202 | #endif | |
1203 | ||
1204 | /* Extract and create a new string from the contents of STRING, a | |
1205 | character string delimited with OPENER and CLOSER. SINDEX is | |
1206 | the address of an int describing the current offset in STRING; | |
1207 | it should point to just after the first OPENER found. On exit, | |
1208 | SINDEX gets the position of the last character of the matching CLOSER. | |
1209 | If OPENER is more than a single character, ALT_OPENER, if non-null, | |
1210 | contains a character string that can also match CLOSER and thus | |
1211 | needs to be skipped. */ | |
1212 | static char * | |
7117c2d2 | 1213 | extract_delimited_string (string, sindex, opener, alt_opener, closer, flags) |
ccc6cda3 JA |
1214 | char *string; |
1215 | int *sindex; | |
1216 | char *opener, *alt_opener, *closer; | |
7117c2d2 | 1217 | int flags; |
ccc6cda3 JA |
1218 | { |
1219 | int i, c, si; | |
7117c2d2 | 1220 | size_t slen; |
ccc6cda3 | 1221 | char *t, *result; |
0628567a | 1222 | int pass_character, nesting_level, in_comment; |
ccc6cda3 | 1223 | int len_closer, len_opener, len_alt_opener; |
7117c2d2 | 1224 | DECLARE_MBSTATE; |
ccc6cda3 | 1225 | |
7117c2d2 | 1226 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 JA |
1227 | len_opener = STRLEN (opener); |
1228 | len_alt_opener = STRLEN (alt_opener); | |
1229 | len_closer = STRLEN (closer); | |
726f6388 | 1230 | |
0628567a | 1231 | pass_character = in_comment = 0; |
726f6388 JA |
1232 | |
1233 | nesting_level = 1; | |
ccc6cda3 | 1234 | i = *sindex; |
726f6388 | 1235 | |
ccc6cda3 | 1236 | while (nesting_level) |
726f6388 | 1237 | { |
ccc6cda3 JA |
1238 | c = string[i]; |
1239 | ||
1240 | if (c == 0) | |
28ef6c31 | 1241 | break; |
ccc6cda3 | 1242 | |
0628567a JA |
1243 | if (in_comment) |
1244 | { | |
1245 | if (c == '\n') | |
1246 | in_comment = 0; | |
1247 | ADVANCE_CHAR (string, slen, i); | |
1248 | continue; | |
1249 | } | |
1250 | ||
ccc6cda3 | 1251 | if (pass_character) /* previous char was backslash */ |
726f6388 JA |
1252 | { |
1253 | pass_character = 0; | |
7117c2d2 | 1254 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1255 | continue; |
1256 | } | |
1257 | ||
0628567a | 1258 | /* Not exactly right yet; should handle shell metacharacters and |
0001803f | 1259 | multibyte characters, too. See COMMENT_BEGIN define in parse.y */ |
3185942a | 1260 | if ((flags & SX_COMMAND) && c == '#' && (i == 0 || string[i - 1] == '\n' || shellblank (string[i - 1]))) |
0628567a JA |
1261 | { |
1262 | in_comment = 1; | |
1263 | ADVANCE_CHAR (string, slen, i); | |
1264 | continue; | |
1265 | } | |
1266 | ||
7117c2d2 | 1267 | if (c == CTLESC || c == '\\') |
726f6388 | 1268 | { |
ccc6cda3 JA |
1269 | pass_character++; |
1270 | i++; | |
1271 | continue; | |
726f6388 JA |
1272 | } |
1273 | ||
495aee44 CR |
1274 | /* Process a nested command substitution, but only if we're parsing an |
1275 | arithmetic substitution. */ | |
0001803f CR |
1276 | if ((flags & SX_COMMAND) && string[i] == '$' && string[i+1] == LPAREN) |
1277 | { | |
1278 | si = i + 2; | |
495aee44 | 1279 | t = extract_command_subst (string, &si, flags|SX_NOALLOC); |
0001803f CR |
1280 | i = si + 1; |
1281 | continue; | |
1282 | } | |
0001803f | 1283 | |
ccc6cda3 JA |
1284 | /* Process a nested OPENER. */ |
1285 | if (STREQN (string + i, opener, len_opener)) | |
726f6388 | 1286 | { |
ccc6cda3 | 1287 | si = i + len_opener; |
3185942a | 1288 | t = extract_delimited_string (string, &si, opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1289 | i = si + 1; |
ccc6cda3 | 1290 | continue; |
726f6388 JA |
1291 | } |
1292 | ||
ccc6cda3 JA |
1293 | /* Process a nested ALT_OPENER */ |
1294 | if (len_alt_opener && STREQN (string + i, alt_opener, len_alt_opener)) | |
726f6388 | 1295 | { |
ccc6cda3 | 1296 | si = i + len_alt_opener; |
3185942a | 1297 | t = extract_delimited_string (string, &si, alt_opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1298 | i = si + 1; |
726f6388 JA |
1299 | continue; |
1300 | } | |
ccc6cda3 JA |
1301 | |
1302 | /* If the current substring terminates the delimited string, decrement | |
1303 | the nesting level. */ | |
1304 | if (STREQN (string + i, closer, len_closer)) | |
726f6388 | 1305 | { |
7117c2d2 | 1306 | i += len_closer - 1; /* move to last byte of the closer */ |
ccc6cda3 JA |
1307 | nesting_level--; |
1308 | if (nesting_level == 0) | |
1309 | break; | |
726f6388 | 1310 | } |
ccc6cda3 JA |
1311 | |
1312 | /* Pass old-style command substitution through verbatim. */ | |
1313 | if (c == '`') | |
28ef6c31 JA |
1314 | { |
1315 | si = i + 1; | |
3185942a | 1316 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
28ef6c31 | 1317 | i = si + 1; |
28ef6c31 JA |
1318 | continue; |
1319 | } | |
ccc6cda3 | 1320 | |
7117c2d2 JA |
1321 | /* Pass single-quoted and double-quoted strings through verbatim. */ |
1322 | if (c == '\'' || c == '"') | |
28ef6c31 JA |
1323 | { |
1324 | si = i + 1; | |
7117c2d2 JA |
1325 | i = (c == '\'') ? skip_single_quoted (string, slen, si) |
1326 | : skip_double_quoted (string, slen, si); | |
28ef6c31 JA |
1327 | continue; |
1328 | } | |
ccc6cda3 | 1329 | |
7117c2d2 JA |
1330 | /* move past this character, which was not special. */ |
1331 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1332 | } |
1333 | ||
b80f6443 | 1334 | if (c == 0 && nesting_level) |
726f6388 | 1335 | { |
b80f6443 JA |
1336 | if (no_longjmp_on_fatal_error == 0) |
1337 | { | |
1338 | report_error (_("bad substitution: no closing `%s' in %s"), closer, string); | |
1339 | last_command_exit_value = EXECUTION_FAILURE; | |
1340 | exp_jump_to_top_level (DISCARD); | |
1341 | } | |
1342 | else | |
1343 | { | |
1344 | *sindex = i; | |
1345 | return (char *)NULL; | |
1346 | } | |
726f6388 | 1347 | } |
ccc6cda3 | 1348 | |
cce855bc | 1349 | si = i - *sindex - len_closer + 1; |
3185942a | 1350 | if (flags & SX_NOALLOC) |
7117c2d2 JA |
1351 | result = (char *)NULL; |
1352 | else | |
1353 | { | |
1354 | result = (char *)xmalloc (1 + si); | |
1355 | strncpy (result, string + *sindex, si); | |
1356 | result[si] = '\0'; | |
1357 | } | |
cce855bc JA |
1358 | *sindex = i; |
1359 | ||
726f6388 JA |
1360 | return (result); |
1361 | } | |
1362 | ||
ccc6cda3 JA |
1363 | /* Extract a parameter expansion expression within ${ and } from STRING. |
1364 | Obey the Posix.2 rules for finding the ending `}': count braces while | |
1365 | skipping over enclosed quoted strings and command substitutions. | |
1366 | SINDEX is the address of an int describing the current offset in STRING; | |
1367 | it should point to just after the first `{' found. On exit, SINDEX | |
1368 | gets the position of the matching `}'. QUOTED is non-zero if this | |
1369 | occurs inside double quotes. */ | |
1370 | /* XXX -- this is very similar to extract_delimited_string -- XXX */ | |
726f6388 | 1371 | static char * |
7117c2d2 | 1372 | extract_dollar_brace_string (string, sindex, quoted, flags) |
726f6388 | 1373 | char *string; |
7117c2d2 | 1374 | int *sindex, quoted, flags; |
726f6388 | 1375 | { |
f73dda09 | 1376 | register int i, c; |
7117c2d2 | 1377 | size_t slen; |
495aee44 | 1378 | int pass_character, nesting_level, si, dolbrace_state; |
ccc6cda3 | 1379 | char *result, *t; |
7117c2d2 | 1380 | DECLARE_MBSTATE; |
726f6388 | 1381 | |
ccc6cda3 | 1382 | pass_character = 0; |
ccc6cda3 | 1383 | nesting_level = 1; |
7117c2d2 | 1384 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 | 1385 | |
495aee44 | 1386 | /* The handling of dolbrace_state needs to agree with the code in parse.y: |
49ed961b CR |
1387 | parse_matched_pair(). The different initial value is to handle the |
1388 | case where this function is called to parse the word in | |
1389 | ${param op word} (SX_WORD). */ | |
1390 | dolbrace_state = (flags & SX_WORD) ? DOLBRACE_WORD : DOLBRACE_PARAM; | |
1391 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && (flags & SX_POSIXEXP)) | |
1392 | dolbrace_state = DOLBRACE_QUOTE; | |
495aee44 | 1393 | |
7117c2d2 JA |
1394 | i = *sindex; |
1395 | while (c = string[i]) | |
726f6388 | 1396 | { |
ccc6cda3 | 1397 | if (pass_character) |
726f6388 | 1398 | { |
ccc6cda3 | 1399 | pass_character = 0; |
7117c2d2 | 1400 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
1401 | continue; |
1402 | } | |
726f6388 | 1403 | |
cce855bc JA |
1404 | /* CTLESCs and backslashes quote the next character. */ |
1405 | if (c == CTLESC || c == '\\') | |
726f6388 | 1406 | { |
ccc6cda3 | 1407 | pass_character++; |
7117c2d2 | 1408 | i++; |
726f6388 JA |
1409 | continue; |
1410 | } | |
1411 | ||
cce855bc | 1412 | if (string[i] == '$' && string[i+1] == LBRACE) |
726f6388 | 1413 | { |
ccc6cda3 | 1414 | nesting_level++; |
7117c2d2 | 1415 | i += 2; |
726f6388 JA |
1416 | continue; |
1417 | } | |
1418 | ||
cce855bc | 1419 | if (c == RBRACE) |
726f6388 | 1420 | { |
ccc6cda3 JA |
1421 | nesting_level--; |
1422 | if (nesting_level == 0) | |
1423 | break; | |
7117c2d2 | 1424 | i++; |
726f6388 JA |
1425 | continue; |
1426 | } | |
1427 | ||
ccc6cda3 JA |
1428 | /* Pass the contents of old-style command substitutions through |
1429 | verbatim. */ | |
1430 | if (c == '`') | |
726f6388 | 1431 | { |
ccc6cda3 | 1432 | si = i + 1; |
3185942a | 1433 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
7117c2d2 | 1434 | i = si + 1; |
ccc6cda3 JA |
1435 | continue; |
1436 | } | |
726f6388 | 1437 | |
cce855bc JA |
1438 | /* Pass the contents of new-style command substitutions and |
1439 | arithmetic substitutions through verbatim. */ | |
1440 | if (string[i] == '$' && string[i+1] == LPAREN) | |
ccc6cda3 | 1441 | { |
726f6388 | 1442 | si = i + 2; |
3185942a | 1443 | t = extract_command_subst (string, &si, flags|SX_NOALLOC); |
7117c2d2 | 1444 | i = si + 1; |
726f6388 JA |
1445 | continue; |
1446 | } | |
1447 | ||
495aee44 | 1448 | #if 0 |
cce855bc JA |
1449 | /* Pass the contents of single-quoted and double-quoted strings |
1450 | through verbatim. */ | |
1451 | if (c == '\'' || c == '"') | |
ccc6cda3 JA |
1452 | { |
1453 | si = i + 1; | |
7117c2d2 JA |
1454 | i = (c == '\'') ? skip_single_quoted (string, slen, si) |
1455 | : skip_double_quoted (string, slen, si); | |
cce855bc | 1456 | /* skip_XXX_quoted leaves index one past close quote */ |
ccc6cda3 JA |
1457 | continue; |
1458 | } | |
495aee44 CR |
1459 | #else /* XXX - bash-4.2 */ |
1460 | /* Pass the contents of double-quoted strings through verbatim. */ | |
1461 | if (c == '"') | |
1462 | { | |
1463 | si = i + 1; | |
1464 | i = skip_double_quoted (string, slen, si); | |
1465 | /* skip_XXX_quoted leaves index one past close quote */ | |
1466 | continue; | |
1467 | } | |
1468 | ||
1469 | if (c == '\'') | |
1470 | { | |
1471 | /*itrace("extract_dollar_brace_string: c == single quote flags = %d quoted = %d dolbrace_state = %d", flags, quoted, dolbrace_state);*/ | |
1472 | if (posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
1473 | ADVANCE_CHAR (string, slen, i); | |
1474 | else | |
1475 | { | |
1476 | si = i + 1; | |
1477 | i = skip_single_quoted (string, slen, si); | |
1478 | } | |
1479 | ||
1480 | continue; | |
1481 | } | |
1482 | #endif | |
7117c2d2 JA |
1483 | |
1484 | /* move past this character, which was not special. */ | |
1485 | ADVANCE_CHAR (string, slen, i); | |
495aee44 CR |
1486 | |
1487 | /* This logic must agree with parse.y:parse_matched_pair, since they | |
1488 | share the same defines. */ | |
1489 | if (dolbrace_state == DOLBRACE_PARAM && c == '%' && (i - *sindex) > 1) | |
1490 | dolbrace_state = DOLBRACE_QUOTE; | |
1491 | else if (dolbrace_state == DOLBRACE_PARAM && c == '#' && (i - *sindex) > 1) | |
1492 | dolbrace_state = DOLBRACE_QUOTE; | |
1493 | else if (dolbrace_state == DOLBRACE_PARAM && c == '/' && (i - *sindex) > 1) | |
1494 | dolbrace_state = DOLBRACE_QUOTE; | |
1495 | else if (dolbrace_state == DOLBRACE_PARAM && c == '^' && (i - *sindex) > 1) | |
1496 | dolbrace_state = DOLBRACE_QUOTE; | |
1497 | else if (dolbrace_state == DOLBRACE_PARAM && c == ',' && (i - *sindex) > 1) | |
1498 | dolbrace_state = DOLBRACE_QUOTE; | |
1499 | else if (dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", c) != 0) | |
1500 | dolbrace_state = DOLBRACE_OP; | |
1501 | else if (dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", c) == 0) | |
1502 | dolbrace_state = DOLBRACE_WORD; | |
cce855bc | 1503 | } |
726f6388 | 1504 | |
b80f6443 | 1505 | if (c == 0 && nesting_level) |
cce855bc | 1506 | { |
b80f6443 JA |
1507 | if (no_longjmp_on_fatal_error == 0) |
1508 | { /* { */ | |
f1be666c | 1509 | report_error (_("bad substitution: no closing `%s' in %s"), "}", string); |
b80f6443 JA |
1510 | last_command_exit_value = EXECUTION_FAILURE; |
1511 | exp_jump_to_top_level (DISCARD); | |
1512 | } | |
1513 | else | |
1514 | { | |
1515 | *sindex = i; | |
1516 | return ((char *)NULL); | |
1517 | } | |
726f6388 | 1518 | } |
726f6388 | 1519 | |
3185942a | 1520 | result = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 JA |
1521 | *sindex = i; |
1522 | ||
ccc6cda3 | 1523 | return (result); |
726f6388 JA |
1524 | } |
1525 | ||
ccc6cda3 JA |
1526 | /* Remove backslashes which are quoting backquotes from STRING. Modifies |
1527 | STRING, and returns a pointer to it. */ | |
1528 | char * | |
1529 | de_backslash (string) | |
726f6388 | 1530 | char *string; |
ccc6cda3 | 1531 | { |
7117c2d2 JA |
1532 | register size_t slen; |
1533 | register int i, j, prev_i; | |
1534 | DECLARE_MBSTATE; | |
726f6388 | 1535 | |
7117c2d2 JA |
1536 | slen = strlen (string); |
1537 | i = j = 0; | |
1538 | ||
1539 | /* Loop copying string[i] to string[j], i >= j. */ | |
1540 | while (i < slen) | |
1541 | { | |
1542 | if (string[i] == '\\' && (string[i + 1] == '`' || string[i + 1] == '\\' || | |
ccc6cda3 | 1543 | string[i + 1] == '$')) |
7117c2d2 JA |
1544 | i++; |
1545 | prev_i = i; | |
1546 | ADVANCE_CHAR (string, slen, i); | |
1547 | if (j < prev_i) | |
b80f6443 | 1548 | do string[j++] = string[prev_i++]; while (prev_i < i); |
7117c2d2 | 1549 | else |
b80f6443 | 1550 | j = i; |
7117c2d2 JA |
1551 | } |
1552 | string[j] = '\0'; | |
1553 | ||
ccc6cda3 JA |
1554 | return (string); |
1555 | } | |
726f6388 | 1556 | |
ccc6cda3 | 1557 | #if 0 |
cce855bc | 1558 | /*UNUSED*/ |
ccc6cda3 JA |
1559 | /* Replace instances of \! in a string with !. */ |
1560 | void | |
1561 | unquote_bang (string) | |
1562 | char *string; | |
1563 | { | |
1564 | register int i, j; | |
1565 | register char *temp; | |
726f6388 | 1566 | |
f73dda09 | 1567 | temp = (char *)xmalloc (1 + strlen (string)); |
726f6388 | 1568 | |
ccc6cda3 JA |
1569 | for (i = 0, j = 0; (temp[j] = string[i]); i++, j++) |
1570 | { | |
1571 | if (string[i] == '\\' && string[i + 1] == '!') | |
1572 | { | |
1573 | temp[j] = '!'; | |
1574 | i++; | |
1575 | } | |
1576 | } | |
1577 | strcpy (string, temp); | |
1578 | free (temp); | |
726f6388 | 1579 | } |
ccc6cda3 | 1580 | #endif |
726f6388 | 1581 | |
3185942a JA |
1582 | #define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0) |
1583 | ||
89a92869 | 1584 | /* This function assumes s[i] == open; returns with s[ret] == close; used to |
0001803f CR |
1585 | parse array subscripts. FLAGS & 1 means to not attempt to skip over |
1586 | matched pairs of quotes or backquotes, or skip word expansions; it is | |
1587 | intended to be used after expansion has been performed and during final | |
1588 | assignment parsing (see arrayfunc.c:assign_compound_array_list()). */ | |
89a92869 CR |
1589 | static int |
1590 | skip_matched_pair (string, start, open, close, flags) | |
1591 | const char *string; | |
1592 | int start, open, close, flags; | |
1593 | { | |
1594 | int i, pass_next, backq, si, c, count; | |
1595 | size_t slen; | |
1596 | char *temp, *ss; | |
1597 | DECLARE_MBSTATE; | |
1598 | ||
1599 | slen = strlen (string + start) + start; | |
1600 | no_longjmp_on_fatal_error = 1; | |
1601 | ||
1602 | i = start + 1; /* skip over leading bracket */ | |
1603 | count = 1; | |
1604 | pass_next = backq = 0; | |
1605 | ss = (char *)string; | |
1606 | while (c = string[i]) | |
1607 | { | |
1608 | if (pass_next) | |
1609 | { | |
1610 | pass_next = 0; | |
1611 | if (c == 0) | |
1612 | CQ_RETURN(i); | |
1613 | ADVANCE_CHAR (string, slen, i); | |
1614 | continue; | |
1615 | } | |
1616 | else if (c == '\\') | |
1617 | { | |
1618 | pass_next = 1; | |
1619 | i++; | |
1620 | continue; | |
1621 | } | |
1622 | else if (backq) | |
1623 | { | |
1624 | if (c == '`') | |
1625 | backq = 0; | |
1626 | ADVANCE_CHAR (string, slen, i); | |
1627 | continue; | |
1628 | } | |
0001803f | 1629 | else if ((flags & 1) == 0 && c == '`') |
89a92869 CR |
1630 | { |
1631 | backq = 1; | |
1632 | i++; | |
1633 | continue; | |
1634 | } | |
0001803f | 1635 | else if ((flags & 1) == 0 && c == open) |
89a92869 CR |
1636 | { |
1637 | count++; | |
1638 | i++; | |
1639 | continue; | |
1640 | } | |
1641 | else if (c == close) | |
1642 | { | |
1643 | count--; | |
1644 | if (count == 0) | |
1645 | break; | |
1646 | i++; | |
1647 | continue; | |
1648 | } | |
0001803f | 1649 | else if ((flags & 1) == 0 && (c == '\'' || c == '"')) |
89a92869 CR |
1650 | { |
1651 | i = (c == '\'') ? skip_single_quoted (ss, slen, ++i) | |
1652 | : skip_double_quoted (ss, slen, ++i); | |
1653 | /* no increment, the skip functions increment past the closing quote. */ | |
1654 | } | |
0001803f | 1655 | else if ((flags&1) == 0 && c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE)) |
89a92869 CR |
1656 | { |
1657 | si = i + 2; | |
1658 | if (string[si] == '\0') | |
1659 | CQ_RETURN(si); | |
1660 | ||
1661 | if (string[i+1] == LPAREN) | |
1662 | temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1663 | else | |
1664 | temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC); | |
1665 | i = si; | |
1666 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1667 | break; | |
1668 | i++; | |
1669 | continue; | |
1670 | } | |
1671 | else | |
1672 | ADVANCE_CHAR (string, slen, i); | |
1673 | } | |
1674 | ||
1675 | CQ_RETURN(i); | |
1676 | } | |
1677 | ||
1678 | #if defined (ARRAY_VARS) | |
1679 | int | |
0001803f | 1680 | skipsubscript (string, start, flags) |
89a92869 | 1681 | const char *string; |
0001803f | 1682 | int start, flags; |
89a92869 | 1683 | { |
0001803f | 1684 | return (skip_matched_pair (string, start, '[', ']', flags)); |
89a92869 CR |
1685 | } |
1686 | #endif | |
1687 | ||
3185942a JA |
1688 | /* Skip characters in STRING until we find a character in DELIMS, and return |
1689 | the index of that character. START is the index into string at which we | |
1690 | begin. This is similar in spirit to strpbrk, but it returns an index into | |
1691 | STRING and takes a starting index. This little piece of code knows quite | |
1692 | a lot of shell syntax. It's very similar to skip_double_quoted and other | |
1693 | functions of that ilk. */ | |
1694 | int | |
1695 | skip_to_delim (string, start, delims, flags) | |
1696 | char *string; | |
1697 | int start; | |
1698 | char *delims; | |
1699 | int flags; | |
1700 | { | |
0001803f | 1701 | int i, pass_next, backq, si, c, invert, skipquote, skipcmd; |
3185942a | 1702 | size_t slen; |
495aee44 | 1703 | char *temp, open[3]; |
3185942a JA |
1704 | DECLARE_MBSTATE; |
1705 | ||
1706 | slen = strlen (string + start) + start; | |
1707 | if (flags & SD_NOJMP) | |
1708 | no_longjmp_on_fatal_error = 1; | |
1709 | invert = (flags & SD_INVERT); | |
0001803f | 1710 | skipcmd = (flags & SD_NOSKIPCMD) == 0; |
3185942a JA |
1711 | |
1712 | i = start; | |
1713 | pass_next = backq = 0; | |
1714 | while (c = string[i]) | |
1715 | { | |
0001803f CR |
1716 | /* If this is non-zero, we should not let quote characters be delimiters |
1717 | and the current character is a single or double quote. We should not | |
1718 | test whether or not it's a delimiter until after we skip single- or | |
1719 | double-quoted strings. */ | |
1720 | skipquote = ((flags & SD_NOQUOTEDELIM) && (c == '\'' || c =='"')); | |
3185942a JA |
1721 | if (pass_next) |
1722 | { | |
1723 | pass_next = 0; | |
1724 | if (c == 0) | |
1725 | CQ_RETURN(i); | |
1726 | ADVANCE_CHAR (string, slen, i); | |
1727 | continue; | |
1728 | } | |
1729 | else if (c == '\\') | |
1730 | { | |
1731 | pass_next = 1; | |
1732 | i++; | |
1733 | continue; | |
1734 | } | |
1735 | else if (backq) | |
1736 | { | |
1737 | if (c == '`') | |
1738 | backq = 0; | |
1739 | ADVANCE_CHAR (string, slen, i); | |
1740 | continue; | |
1741 | } | |
1742 | else if (c == '`') | |
1743 | { | |
1744 | backq = 1; | |
1745 | i++; | |
1746 | continue; | |
1747 | } | |
0001803f | 1748 | else if (skipquote == 0 && invert == 0 && member (c, delims)) |
3185942a JA |
1749 | break; |
1750 | else if (c == '\'' || c == '"') | |
1751 | { | |
1752 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1753 | : skip_double_quoted (string, slen, ++i); | |
1754 | /* no increment, the skip functions increment past the closing quote. */ | |
1755 | } | |
0001803f | 1756 | else if (c == '$' && ((skipcmd && string[i+1] == LPAREN) || string[i+1] == LBRACE)) |
3185942a JA |
1757 | { |
1758 | si = i + 2; | |
1759 | if (string[si] == '\0') | |
1760 | CQ_RETURN(si); | |
1761 | ||
1762 | if (string[i+1] == LPAREN) | |
1763 | temp = extract_delimited_string (string, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1764 | else | |
1765 | temp = extract_dollar_brace_string (string, &si, 0, SX_NOALLOC); | |
1766 | i = si; | |
1767 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1768 | break; | |
1769 | i++; | |
1770 | continue; | |
1771 | } | |
0001803f CR |
1772 | #if defined (PROCESS_SUBSTITUTION) |
1773 | else if (skipcmd && (c == '<' || c == '>') && string[i+1] == LPAREN) | |
1774 | { | |
1775 | si = i + 2; | |
1776 | if (string[si] == '\0') | |
1777 | CQ_RETURN(si); | |
1778 | temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si); | |
1779 | i = si; | |
1780 | if (string[i] == '\0') | |
1781 | break; | |
1782 | i++; | |
1783 | continue; | |
1784 | } | |
1785 | #endif /* PROCESS_SUBSTITUTION */ | |
495aee44 CR |
1786 | #if defined (EXTENDED_GLOB) |
1787 | else if ((flags & SD_EXTGLOB) && extended_glob && string[i+1] == LPAREN && member (c, "?*+!@")) | |
1788 | { | |
1789 | si = i + 2; | |
1790 | if (string[si] == '\0') | |
1791 | CQ_RETURN(si); | |
1792 | ||
1793 | open[0] = c; | |
1794 | open[1] = LPAREN; | |
1795 | open[2] = '\0'; | |
1796 | temp = extract_delimited_string (string, &si, open, "(", ")", SX_NOALLOC); /* ) */ | |
1797 | ||
1798 | i = si; | |
1799 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1800 | break; | |
1801 | i++; | |
1802 | continue; | |
1803 | } | |
1804 | #endif | |
0001803f | 1805 | else if ((skipquote || invert) && (member (c, delims) == 0)) |
3185942a JA |
1806 | break; |
1807 | else | |
1808 | ADVANCE_CHAR (string, slen, i); | |
1809 | } | |
1810 | ||
1811 | CQ_RETURN(i); | |
1812 | } | |
1813 | ||
ccc6cda3 | 1814 | #if defined (READLINE) |
726f6388 JA |
1815 | /* Return 1 if the portion of STRING ending at EINDEX is quoted (there is |
1816 | an unclosed quoted string), or if the character at EINDEX is quoted | |
28ef6c31 | 1817 | by a backslash. NO_LONGJMP_ON_FATAL_ERROR is used to flag that the various |
b72432fd | 1818 | single and double-quoted string parsing functions should not return an |
7117c2d2 JA |
1819 | error if there are unclosed quotes or braces. The characters that this |
1820 | recognizes need to be the same as the contents of | |
1821 | rl_completer_quote_characters. */ | |
b72432fd | 1822 | |
726f6388 JA |
1823 | int |
1824 | char_is_quoted (string, eindex) | |
1825 | char *string; | |
1826 | int eindex; | |
1827 | { | |
7117c2d2 JA |
1828 | int i, pass_next, c; |
1829 | size_t slen; | |
1830 | DECLARE_MBSTATE; | |
726f6388 | 1831 | |
7117c2d2 | 1832 | slen = strlen (string); |
28ef6c31 | 1833 | no_longjmp_on_fatal_error = 1; |
7117c2d2 JA |
1834 | i = pass_next = 0; |
1835 | while (i <= eindex) | |
726f6388 | 1836 | { |
7117c2d2 JA |
1837 | c = string[i]; |
1838 | ||
726f6388 JA |
1839 | if (pass_next) |
1840 | { | |
1841 | pass_next = 0; | |
1842 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
b72432fd | 1843 | CQ_RETURN(1); |
7117c2d2 | 1844 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1845 | continue; |
1846 | } | |
7117c2d2 | 1847 | else if (c == '\\') |
ccc6cda3 JA |
1848 | { |
1849 | pass_next = 1; | |
7117c2d2 | 1850 | i++; |
ccc6cda3 JA |
1851 | continue; |
1852 | } | |
7117c2d2 JA |
1853 | else if (c == '\'' || c == '"') |
1854 | { | |
1855 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1856 | : skip_double_quoted (string, slen, ++i); | |
1857 | if (i > eindex) | |
1858 | CQ_RETURN(1); | |
1859 | /* no increment, the skip_xxx functions go one past end */ | |
1860 | } | |
1861 | else | |
1862 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 1863 | } |
7117c2d2 | 1864 | |
b72432fd | 1865 | CQ_RETURN(0); |
726f6388 JA |
1866 | } |
1867 | ||
726f6388 JA |
1868 | int |
1869 | unclosed_pair (string, eindex, openstr) | |
1870 | char *string; | |
1871 | int eindex; | |
1872 | char *openstr; | |
1873 | { | |
ccc6cda3 | 1874 | int i, pass_next, openc, olen; |
7117c2d2 JA |
1875 | size_t slen; |
1876 | DECLARE_MBSTATE; | |
726f6388 | 1877 | |
7117c2d2 | 1878 | slen = strlen (string); |
726f6388 | 1879 | olen = strlen (openstr); |
7117c2d2 JA |
1880 | i = pass_next = openc = 0; |
1881 | while (i <= eindex) | |
726f6388 JA |
1882 | { |
1883 | if (pass_next) | |
1884 | { | |
1885 | pass_next = 0; | |
1886 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
1887 | return 0; | |
7117c2d2 JA |
1888 | ADVANCE_CHAR (string, slen, i); |
1889 | continue; | |
1890 | } | |
1891 | else if (string[i] == '\\') | |
1892 | { | |
1893 | pass_next = 1; | |
1894 | i++; | |
726f6388 JA |
1895 | continue; |
1896 | } | |
1897 | else if (STREQN (string + i, openstr, olen)) | |
1898 | { | |
1899 | openc = 1 - openc; | |
7117c2d2 | 1900 | i += olen; |
726f6388 | 1901 | } |
ccc6cda3 | 1902 | else if (string[i] == '\'' || string[i] == '"') |
726f6388 | 1903 | { |
7117c2d2 JA |
1904 | i = (string[i] == '\'') ? skip_single_quoted (string, slen, i) |
1905 | : skip_double_quoted (string, slen, i); | |
726f6388 JA |
1906 | if (i > eindex) |
1907 | return 0; | |
1908 | } | |
7117c2d2 JA |
1909 | else |
1910 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1911 | } |
1912 | return (openc); | |
1913 | } | |
bb70624e | 1914 | |
bb70624e JA |
1915 | /* Split STRING (length SLEN) at DELIMS, and return a WORD_LIST with the |
1916 | individual words. If DELIMS is NULL, the current value of $IFS is used | |
b80f6443 JA |
1917 | to split the string, and the function follows the shell field splitting |
1918 | rules. SENTINEL is an index to look for. NWP, if non-NULL, | |
bb70624e JA |
1919 | gets the number of words in the returned list. CWP, if non-NULL, gets |
1920 | the index of the word containing SENTINEL. Non-whitespace chars in | |
1921 | DELIMS delimit separate fields. */ | |
1922 | WORD_LIST * | |
0001803f | 1923 | split_at_delims (string, slen, delims, sentinel, flags, nwp, cwp) |
bb70624e JA |
1924 | char *string; |
1925 | int slen; | |
1926 | char *delims; | |
0001803f | 1927 | int sentinel, flags; |
bb70624e JA |
1928 | int *nwp, *cwp; |
1929 | { | |
0001803f | 1930 | int ts, te, i, nw, cw, ifs_split, dflags; |
f73dda09 | 1931 | char *token, *d, *d2; |
bb70624e JA |
1932 | WORD_LIST *ret, *tl; |
1933 | ||
1934 | if (string == 0 || *string == '\0') | |
1935 | { | |
1936 | if (nwp) | |
1937 | *nwp = 0; | |
1938 | if (cwp) | |
1939 | *cwp = 0; | |
1940 | return ((WORD_LIST *)NULL); | |
1941 | } | |
1942 | ||
7117c2d2 | 1943 | d = (delims == 0) ? ifs_value : delims; |
b80f6443 | 1944 | ifs_split = delims == 0; |
bb70624e JA |
1945 | |
1946 | /* Make d2 the non-whitespace characters in delims */ | |
1947 | d2 = 0; | |
1948 | if (delims) | |
1949 | { | |
95732b49 JA |
1950 | size_t slength; |
1951 | #if defined (HANDLE_MULTIBYTE) | |
1952 | size_t mblength = 1; | |
1953 | #endif | |
1954 | DECLARE_MBSTATE; | |
1955 | ||
1956 | slength = strlen (delims); | |
1957 | d2 = (char *)xmalloc (slength + 1); | |
1958 | i = ts = 0; | |
1959 | while (delims[i]) | |
bb70624e | 1960 | { |
95732b49 | 1961 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
1962 | mbstate_t state_bak; |
1963 | state_bak = state; | |
95732b49 JA |
1964 | mblength = MBRLEN (delims + i, slength, &state); |
1965 | if (MB_INVALIDCH (mblength)) | |
1966 | state = state_bak; | |
1967 | else if (mblength > 1) | |
1968 | { | |
1969 | memcpy (d2 + ts, delims + i, mblength); | |
1970 | ts += mblength; | |
1971 | i += mblength; | |
1972 | slength -= mblength; | |
1973 | continue; | |
1974 | } | |
1975 | #endif | |
1976 | if (whitespace (delims[i]) == 0) | |
bb70624e | 1977 | d2[ts++] = delims[i]; |
95732b49 JA |
1978 | |
1979 | i++; | |
1980 | slength--; | |
bb70624e JA |
1981 | } |
1982 | d2[ts] = '\0'; | |
1983 | } | |
1984 | ||
1985 | ret = (WORD_LIST *)NULL; | |
1986 | ||
0001803f | 1987 | /* Remove sequences of whitespace characters at the start of the string, as |
b80f6443 JA |
1988 | long as those characters are delimiters. */ |
1989 | for (i = 0; member (string[i], d) && spctabnl (string[i]); i++) | |
bb70624e JA |
1990 | ; |
1991 | if (string[i] == '\0') | |
1992 | return (ret); | |
1993 | ||
1994 | ts = i; | |
1995 | nw = 0; | |
1996 | cw = -1; | |
0001803f | 1997 | dflags = flags|SD_NOJMP; |
bb70624e JA |
1998 | while (1) |
1999 | { | |
0001803f | 2000 | te = skip_to_delim (string, ts, d, dflags); |
bb70624e JA |
2001 | |
2002 | /* If we have a non-whitespace delimiter character, use it to make a | |
2003 | separate field. This is just about what $IFS splitting does and | |
2004 | is closer to the behavior of the shell parser. */ | |
28ef6c31 | 2005 | if (ts == te && d2 && member (string[ts], d2)) |
bb70624e JA |
2006 | { |
2007 | te = ts + 1; | |
b80f6443 JA |
2008 | /* If we're using IFS splitting, the non-whitespace delimiter char |
2009 | and any additional IFS whitespace delimits a field. */ | |
2010 | if (ifs_split) | |
2011 | while (member (string[te], d) && spctabnl (string[te])) | |
2012 | te++; | |
2013 | else | |
2014 | while (member (string[te], d2)) | |
2015 | te++; | |
bb70624e JA |
2016 | } |
2017 | ||
2018 | token = substring (string, ts, te); | |
2019 | ||
2020 | ret = add_string_to_list (token, ret); | |
2021 | free (token); | |
2022 | nw++; | |
2023 | ||
2024 | if (sentinel >= ts && sentinel <= te) | |
2025 | cw = nw; | |
2026 | ||
2027 | /* If the cursor is at whitespace just before word start, set the | |
28ef6c31 | 2028 | sentinel word to the current word. */ |
bb70624e JA |
2029 | if (cwp && cw == -1 && sentinel == ts-1) |
2030 | cw = nw; | |
2031 | ||
2032 | /* If the cursor is at whitespace between two words, make a new, empty | |
28ef6c31 JA |
2033 | word, add it before (well, after, since the list is in reverse order) |
2034 | the word we just added, and set the current word to that one. */ | |
bb70624e | 2035 | if (cwp && cw == -1 && sentinel < ts) |
28ef6c31 | 2036 | { |
7117c2d2 | 2037 | tl = make_word_list (make_word (""), ret->next); |
28ef6c31 JA |
2038 | ret->next = tl; |
2039 | cw = nw; | |
2040 | nw++; | |
2041 | } | |
bb70624e JA |
2042 | |
2043 | if (string[te] == 0) | |
2044 | break; | |
2045 | ||
b80f6443 JA |
2046 | i = te; |
2047 | while (member (string[i], d) && (ifs_split || spctabnl(string[i]))) | |
bb70624e JA |
2048 | i++; |
2049 | ||
2050 | if (string[i]) | |
2051 | ts = i; | |
2052 | else | |
2053 | break; | |
2054 | } | |
2055 | ||
2056 | /* Special case for SENTINEL at the end of STRING. If we haven't found | |
2057 | the word containing SENTINEL yet, and the index we're looking for is at | |
0001803f CR |
2058 | the end of STRING (or past the end of the previously-found token, |
2059 | possible if the end of the line is composed solely of IFS whitespace) | |
2060 | add an additional null argument and set the current word pointer to that. */ | |
2061 | if (cwp && cw == -1 && (sentinel >= slen || sentinel >= te)) | |
bb70624e JA |
2062 | { |
2063 | if (whitespace (string[sentinel - 1])) | |
28ef6c31 JA |
2064 | { |
2065 | token = ""; | |
2066 | ret = add_string_to_list (token, ret); | |
2067 | nw++; | |
2068 | } | |
bb70624e JA |
2069 | cw = nw; |
2070 | } | |
2071 | ||
2072 | if (nwp) | |
2073 | *nwp = nw; | |
2074 | if (cwp) | |
2075 | *cwp = cw; | |
2076 | ||
2077 | return (REVERSE_LIST (ret, WORD_LIST *)); | |
2078 | } | |
726f6388 JA |
2079 | #endif /* READLINE */ |
2080 | ||
ccc6cda3 JA |
2081 | #if 0 |
2082 | /* UNUSED */ | |
726f6388 JA |
2083 | /* Extract the name of the variable to bind to from the assignment string. */ |
2084 | char * | |
2085 | assignment_name (string) | |
2086 | char *string; | |
2087 | { | |
ccc6cda3 | 2088 | int offset; |
726f6388 JA |
2089 | char *temp; |
2090 | ||
b80f6443 | 2091 | offset = assignment (string, 0); |
ccc6cda3 | 2092 | if (offset == 0) |
726f6388 | 2093 | return (char *)NULL; |
bb70624e | 2094 | temp = substring (string, 0, offset); |
726f6388 JA |
2095 | return (temp); |
2096 | } | |
ccc6cda3 | 2097 | #endif |
726f6388 | 2098 | |
cce855bc JA |
2099 | /* **************************************************************** */ |
2100 | /* */ | |
2101 | /* Functions to convert strings to WORD_LISTs and vice versa */ | |
2102 | /* */ | |
2103 | /* **************************************************************** */ | |
2104 | ||
726f6388 JA |
2105 | /* Return a single string of all the words in LIST. SEP is the separator |
2106 | to put between individual elements of LIST in the output string. */ | |
7117c2d2 | 2107 | char * |
726f6388 JA |
2108 | string_list_internal (list, sep) |
2109 | WORD_LIST *list; | |
2110 | char *sep; | |
2111 | { | |
2112 | register WORD_LIST *t; | |
2113 | char *result, *r; | |
2114 | int word_len, sep_len, result_size; | |
2115 | ||
ccc6cda3 | 2116 | if (list == 0) |
726f6388 JA |
2117 | return ((char *)NULL); |
2118 | ||
b80f6443 JA |
2119 | /* Short-circuit quickly if we don't need to separate anything. */ |
2120 | if (list->next == 0) | |
2121 | return (savestring (list->word->word)); | |
2122 | ||
726f6388 JA |
2123 | /* This is nearly always called with either sep[0] == 0 or sep[1] == 0. */ |
2124 | sep_len = STRLEN (sep); | |
2125 | result_size = 0; | |
2126 | ||
2127 | for (t = list; t; t = t->next) | |
2128 | { | |
2129 | if (t != list) | |
2130 | result_size += sep_len; | |
2131 | result_size += strlen (t->word->word); | |
2132 | } | |
2133 | ||
f73dda09 | 2134 | r = result = (char *)xmalloc (result_size + 1); |
726f6388 JA |
2135 | |
2136 | for (t = list; t; t = t->next) | |
2137 | { | |
2138 | if (t != list && sep_len) | |
2139 | { | |
ccc6cda3 JA |
2140 | if (sep_len > 1) |
2141 | { | |
2142 | FASTCOPY (sep, r, sep_len); | |
2143 | r += sep_len; | |
2144 | } | |
2145 | else | |
2146 | *r++ = sep[0]; | |
726f6388 JA |
2147 | } |
2148 | ||
2149 | word_len = strlen (t->word->word); | |
2150 | FASTCOPY (t->word->word, r, word_len); | |
2151 | r += word_len; | |
2152 | } | |
2153 | ||
ccc6cda3 | 2154 | *r = '\0'; |
726f6388 JA |
2155 | return (result); |
2156 | } | |
2157 | ||
2158 | /* Return a single string of all the words present in LIST, separating | |
2159 | each word with a space. */ | |
2160 | char * | |
2161 | string_list (list) | |
2162 | WORD_LIST *list; | |
2163 | { | |
2164 | return (string_list_internal (list, " ")); | |
2165 | } | |
2166 | ||
3185942a JA |
2167 | /* An external interface that can be used by the rest of the shell to |
2168 | obtain a string containing the first character in $IFS. Handles all | |
2169 | the multibyte complications. If LENP is non-null, it is set to the | |
2170 | length of the returned string. */ | |
2171 | char * | |
2172 | ifs_firstchar (lenp) | |
2173 | int *lenp; | |
2174 | { | |
2175 | char *ret; | |
2176 | int len; | |
2177 | ||
2178 | ret = xmalloc (MB_LEN_MAX + 1); | |
2179 | #if defined (HANDLE_MULTIBYTE) | |
2180 | if (ifs_firstc_len == 1) | |
2181 | { | |
2182 | ret[0] = ifs_firstc[0]; | |
2183 | ret[1] = '\0'; | |
2184 | len = ret[0] ? 1 : 0; | |
2185 | } | |
2186 | else | |
2187 | { | |
2188 | memcpy (ret, ifs_firstc, ifs_firstc_len); | |
2189 | ret[len = ifs_firstc_len] = '\0'; | |
2190 | } | |
2191 | #else | |
2192 | ret[0] = ifs_firstc; | |
2193 | ret[1] = '\0'; | |
2194 | len = ret[0] ? 0 : 1; | |
2195 | #endif | |
2196 | ||
2197 | if (lenp) | |
2198 | *lenp = len; | |
2199 | ||
2200 | return ret; | |
2201 | } | |
2202 | ||
726f6388 JA |
2203 | /* Return a single string of all the words present in LIST, obeying the |
2204 | quoting rules for "$*", to wit: (P1003.2, draft 11, 3.5.2) "If the | |
2205 | expansion [of $*] appears within a double quoted string, it expands | |
2206 | to a single field with the value of each parameter separated by the | |
2207 | first character of the IFS variable, or by a <space> if IFS is unset." */ | |
f73dda09 | 2208 | char * |
726f6388 JA |
2209 | string_list_dollar_star (list) |
2210 | WORD_LIST *list; | |
2211 | { | |
0628567a | 2212 | char *ret; |
95732b49 | 2213 | #if defined (HANDLE_MULTIBYTE) |
0628567a | 2214 | # if defined (__GNUC__) |
95732b49 | 2215 | char sep[MB_CUR_MAX + 1]; |
0628567a JA |
2216 | # else |
2217 | char *sep = 0; | |
2218 | # endif | |
95732b49 | 2219 | #else |
7117c2d2 | 2220 | char sep[2]; |
95732b49 | 2221 | #endif |
726f6388 | 2222 | |
95732b49 | 2223 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
2224 | # if !defined (__GNUC__) |
2225 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2226 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2227 | if (ifs_firstc_len == 1) |
2228 | { | |
2229 | sep[0] = ifs_firstc[0]; | |
2230 | sep[1] = '\0'; | |
2231 | } | |
2232 | else | |
2233 | { | |
2234 | memcpy (sep, ifs_firstc, ifs_firstc_len); | |
2235 | sep[ifs_firstc_len] = '\0'; | |
2236 | } | |
2237 | #else | |
7117c2d2 | 2238 | sep[0] = ifs_firstc; |
726f6388 | 2239 | sep[1] = '\0'; |
95732b49 | 2240 | #endif |
726f6388 | 2241 | |
0628567a JA |
2242 | ret = string_list_internal (list, sep); |
2243 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2244 | free (sep); | |
2245 | #endif | |
2246 | return ret; | |
726f6388 JA |
2247 | } |
2248 | ||
cce855bc JA |
2249 | /* Turn $@ into a string. If (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
2250 | is non-zero, the $@ appears within double quotes, and we should quote | |
2251 | the list before converting it into a string. If IFS is unset, and the | |
2252 | word is not quoted, we just need to quote CTLESC and CTLNUL characters | |
2253 | in the words in the list, because the default value of $IFS is | |
2254 | <space><tab><newline>, IFS characters in the words in the list should | |
2255 | also be split. If IFS is null, and the word is not quoted, we need | |
2256 | to quote the words in the list to preserve the positional parameters | |
2257 | exactly. */ | |
f73dda09 | 2258 | char * |
cce855bc JA |
2259 | string_list_dollar_at (list, quoted) |
2260 | WORD_LIST *list; | |
2261 | int quoted; | |
2262 | { | |
95732b49 JA |
2263 | char *ifs, *ret; |
2264 | #if defined (HANDLE_MULTIBYTE) | |
0628567a | 2265 | # if defined (__GNUC__) |
95732b49 | 2266 | char sep[MB_CUR_MAX + 1]; |
0628567a JA |
2267 | # else |
2268 | char *sep = 0; | |
2269 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2270 | #else |
2271 | char sep[2]; | |
2272 | #endif | |
cce855bc JA |
2273 | WORD_LIST *tlist; |
2274 | ||
7117c2d2 JA |
2275 | /* XXX this could just be ifs = ifs_value; */ |
2276 | ifs = ifs_var ? value_cell (ifs_var) : (char *)0; | |
cce855bc | 2277 | |
95732b49 | 2278 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
2279 | # if !defined (__GNUC__) |
2280 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2281 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2282 | if (ifs && *ifs) |
2283 | { | |
2284 | if (ifs_firstc_len == 1) | |
2285 | { | |
2286 | sep[0] = ifs_firstc[0]; | |
2287 | sep[1] = '\0'; | |
2288 | } | |
2289 | else | |
2290 | { | |
2291 | memcpy (sep, ifs_firstc, ifs_firstc_len); | |
2292 | sep[ifs_firstc_len] = '\0'; | |
2293 | } | |
2294 | } | |
2295 | else | |
2296 | { | |
2297 | sep[0] = ' '; | |
2298 | sep[1] = '\0'; | |
2299 | } | |
2300 | #else | |
cce855bc JA |
2301 | sep[0] = (ifs == 0 || *ifs == 0) ? ' ' : *ifs; |
2302 | sep[1] = '\0'; | |
95732b49 | 2303 | #endif |
cce855bc | 2304 | |
f1be666c JA |
2305 | /* XXX -- why call quote_list if ifs == 0? we can get away without doing |
2306 | it now that quote_escapes quotes spaces */ | |
0001803f | 2307 | tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
cce855bc JA |
2308 | ? quote_list (list) |
2309 | : list_quote_escapes (list); | |
0628567a JA |
2310 | |
2311 | ret = string_list_internal (tlist, sep); | |
2312 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2313 | free (sep); | |
2314 | #endif | |
2315 | return ret; | |
cce855bc JA |
2316 | } |
2317 | ||
3185942a JA |
2318 | /* Turn the positional paramters into a string, understanding quoting and |
2319 | the various subtleties of using the first character of $IFS as the | |
2320 | separator. Calls string_list_dollar_at, string_list_dollar_star, and | |
2321 | string_list as appropriate. */ | |
2322 | char * | |
2323 | string_list_pos_params (pchar, list, quoted) | |
2324 | int pchar; | |
2325 | WORD_LIST *list; | |
2326 | int quoted; | |
2327 | { | |
2328 | char *ret; | |
2329 | WORD_LIST *tlist; | |
2330 | ||
2331 | if (pchar == '*' && (quoted & Q_DOUBLE_QUOTES)) | |
2332 | { | |
2333 | tlist = quote_list (list); | |
2334 | word_list_remove_quoted_nulls (tlist); | |
2335 | ret = string_list_dollar_star (tlist); | |
2336 | } | |
2337 | else if (pchar == '*' && (quoted & Q_HERE_DOCUMENT)) | |
2338 | { | |
2339 | tlist = quote_list (list); | |
2340 | word_list_remove_quoted_nulls (tlist); | |
2341 | ret = string_list (tlist); | |
2342 | } | |
2343 | else if (pchar == '*') | |
2344 | { | |
2345 | /* Even when unquoted, string_list_dollar_star does the right thing | |
2346 | making sure that the first character of $IFS is used as the | |
2347 | separator. */ | |
2348 | ret = string_list_dollar_star (list); | |
2349 | } | |
2350 | else if (pchar == '@' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
2351 | /* We use string_list_dollar_at, but only if the string is quoted, since | |
2352 | that quotes the escapes if it's not, which we don't want. We could | |
2353 | use string_list (the old code did), but that doesn't do the right | |
2354 | thing if the first character of $IFS is not a space. We use | |
2355 | string_list_dollar_star if the string is unquoted so we make sure that | |
2356 | the elements of $@ are separated by the first character of $IFS for | |
2357 | later splitting. */ | |
2358 | ret = string_list_dollar_at (list, quoted); | |
2359 | else if (pchar == '@') | |
2360 | ret = string_list_dollar_star (list); | |
2361 | else | |
2362 | ret = string_list ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? quote_list (list) : list); | |
2363 | ||
2364 | return ret; | |
2365 | } | |
2366 | ||
726f6388 JA |
2367 | /* Return the list of words present in STRING. Separate the string into |
2368 | words at any of the characters found in SEPARATORS. If QUOTED is | |
2369 | non-zero then word in the list will have its quoted flag set, otherwise | |
2370 | the quoted flag is left as make_word () deemed fit. | |
2371 | ||
2372 | This obeys the P1003.2 word splitting semantics. If `separators' is | |
2373 | exactly <space><tab><newline>, then the splitting algorithm is that of | |
2374 | the Bourne shell, which treats any sequence of characters from `separators' | |
2375 | as a delimiter. If IFS is unset, which results in `separators' being set | |
2376 | to "", no splitting occurs. If separators has some other value, the | |
2377 | following rules are applied (`IFS white space' means zero or more | |
2378 | occurrences of <space>, <tab>, or <newline>, as long as those characters | |
2379 | are in `separators'): | |
2380 | ||
2381 | 1) IFS white space is ignored at the start and the end of the | |
2382 | string. | |
2383 | 2) Each occurrence of a character in `separators' that is not | |
2384 | IFS white space, along with any adjacent occurrences of | |
2385 | IFS white space delimits a field. | |
2386 | 3) Any nonzero-length sequence of IFS white space delimits a field. | |
2387 | */ | |
2388 | ||
2389 | /* BEWARE! list_string strips null arguments. Don't call it twice and | |
2390 | expect to have "" preserved! */ | |
2391 | ||
726f6388 JA |
2392 | /* This performs word splitting and quoted null character removal on |
2393 | STRING. */ | |
b80f6443 JA |
2394 | #define issep(c) \ |
2395 | (((separators)[0]) ? ((separators)[1] ? isifs(c) \ | |
2396 | : (c) == (separators)[0]) \ | |
2397 | : 0) | |
726f6388 JA |
2398 | |
2399 | WORD_LIST * | |
2400 | list_string (string, separators, quoted) | |
2401 | register char *string, *separators; | |
2402 | int quoted; | |
2403 | { | |
ccc6cda3 JA |
2404 | WORD_LIST *result; |
2405 | WORD_DESC *t; | |
2406 | char *current_word, *s; | |
3185942a | 2407 | int sindex, sh_style_split, whitesep, xflags; |
95732b49 | 2408 | size_t slen; |
726f6388 JA |
2409 | |
2410 | if (!string || !*string) | |
2411 | return ((WORD_LIST *)NULL); | |
2412 | ||
7117c2d2 JA |
2413 | sh_style_split = separators && separators[0] == ' ' && |
2414 | separators[1] == '\t' && | |
2415 | separators[2] == '\n' && | |
2416 | separators[3] == '\0'; | |
3185942a JA |
2417 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2418 | { | |
2419 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2420 | else if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2421 | } | |
726f6388 | 2422 | |
95732b49 | 2423 | slen = 0; |
726f6388 JA |
2424 | /* Remove sequences of whitespace at the beginning of STRING, as |
2425 | long as those characters appear in IFS. Do not do this if | |
2426 | STRING is quoted or if there are no separator characters. */ | |
2427 | if (!quoted || !separators || !*separators) | |
2428 | { | |
2429 | for (s = string; *s && spctabnl (*s) && issep (*s); s++); | |
2430 | ||
2431 | if (!*s) | |
2432 | return ((WORD_LIST *)NULL); | |
2433 | ||
2434 | string = s; | |
2435 | } | |
2436 | ||
2437 | /* OK, now STRING points to a word that does not begin with white space. | |
2438 | The splitting algorithm is: | |
7117c2d2 JA |
2439 | extract a word, stopping at a separator |
2440 | skip sequences of spc, tab, or nl as long as they are separators | |
726f6388 | 2441 | This obeys the field splitting rules in Posix.2. */ |
95732b49 | 2442 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 1; |
ccc6cda3 | 2443 | for (result = (WORD_LIST *)NULL, sindex = 0; string[sindex]; ) |
726f6388 | 2444 | { |
95732b49 JA |
2445 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2446 | unless multibyte chars are possible. */ | |
3185942a | 2447 | current_word = string_extract_verbatim (string, slen, &sindex, separators, xflags); |
ccc6cda3 | 2448 | if (current_word == 0) |
726f6388 JA |
2449 | break; |
2450 | ||
2451 | /* If we have a quoted empty string, add a quoted null argument. We | |
2452 | want to preserve the quoted null character iff this is a quoted | |
2453 | empty string; otherwise the quoted null characters are removed | |
2454 | below. */ | |
2455 | if (QUOTED_NULL (current_word)) | |
2456 | { | |
95732b49 | 2457 | t = alloc_word_desc (); |
726f6388 | 2458 | t->word = make_quoted_char ('\0'); |
95732b49 | 2459 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
726f6388 JA |
2460 | result = make_word_list (t, result); |
2461 | } | |
ccc6cda3 | 2462 | else if (current_word[0] != '\0') |
726f6388 JA |
2463 | { |
2464 | /* If we have something, then add it regardless. However, | |
2465 | perform quoted null character removal on the current word. */ | |
2466 | remove_quoted_nulls (current_word); | |
cce855bc | 2467 | result = add_string_to_list (current_word, result); |
95732b49 | 2468 | result->word->flags &= ~W_HASQUOTEDNULL; /* just to be sure */ |
ccc6cda3 JA |
2469 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) |
2470 | result->word->flags |= W_QUOTED; | |
726f6388 JA |
2471 | } |
2472 | ||
2473 | /* If we're not doing sequences of separators in the traditional | |
2474 | Bourne shell style, then add a quoted null argument. */ | |
726f6388 JA |
2475 | else if (!sh_style_split && !spctabnl (string[sindex])) |
2476 | { | |
95732b49 | 2477 | t = alloc_word_desc (); |
ccc6cda3 | 2478 | t->word = make_quoted_char ('\0'); |
95732b49 | 2479 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
ccc6cda3 | 2480 | result = make_word_list (t, result); |
726f6388 JA |
2481 | } |
2482 | ||
2483 | free (current_word); | |
2484 | ||
28ef6c31 JA |
2485 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2486 | whitesep = string[sindex] && spctabnl (string[sindex]); | |
2487 | ||
726f6388 JA |
2488 | /* Move past the current separator character. */ |
2489 | if (string[sindex]) | |
95732b49 JA |
2490 | { |
2491 | DECLARE_MBSTATE; | |
2492 | ADVANCE_CHAR (string, slen, sindex); | |
2493 | } | |
726f6388 JA |
2494 | |
2495 | /* Now skip sequences of space, tab, or newline characters if they are | |
2496 | in the list of separators. */ | |
2497 | while (string[sindex] && spctabnl (string[sindex]) && issep (string[sindex])) | |
2498 | sindex++; | |
28ef6c31 | 2499 | |
7117c2d2 JA |
2500 | /* If the first separator was IFS whitespace and the current character |
2501 | is a non-whitespace IFS character, it should be part of the current | |
2502 | field delimiter, not a separate delimiter that would result in an | |
2503 | empty field. Look at POSIX.2, 3.6.5, (3)(b). */ | |
28ef6c31 | 2504 | if (string[sindex] && whitesep && issep (string[sindex]) && !spctabnl (string[sindex])) |
95732b49 JA |
2505 | { |
2506 | sindex++; | |
2507 | /* An IFS character that is not IFS white space, along with any | |
2508 | adjacent IFS white space, shall delimit a field. (SUSv3) */ | |
0628567a | 2509 | while (string[sindex] && spctabnl (string[sindex]) && isifs (string[sindex])) |
95732b49 JA |
2510 | sindex++; |
2511 | } | |
726f6388 JA |
2512 | } |
2513 | return (REVERSE_LIST (result, WORD_LIST *)); | |
2514 | } | |
2515 | ||
2516 | /* Parse a single word from STRING, using SEPARATORS to separate fields. | |
2517 | ENDPTR is set to the first character after the word. This is used by | |
7117c2d2 JA |
2518 | the `read' builtin. This is never called with SEPARATORS != $IFS; |
2519 | it should be simplified. | |
2520 | ||
726f6388 JA |
2521 | XXX - this function is very similar to list_string; they should be |
2522 | combined - XXX */ | |
2523 | char * | |
2524 | get_word_from_string (stringp, separators, endptr) | |
2525 | char **stringp, *separators, **endptr; | |
2526 | { | |
2527 | register char *s; | |
2528 | char *current_word; | |
3185942a | 2529 | int sindex, sh_style_split, whitesep, xflags; |
95732b49 | 2530 | size_t slen; |
726f6388 JA |
2531 | |
2532 | if (!stringp || !*stringp || !**stringp) | |
2533 | return ((char *)NULL); | |
ccc6cda3 | 2534 | |
7117c2d2 JA |
2535 | sh_style_split = separators && separators[0] == ' ' && |
2536 | separators[1] == '\t' && | |
2537 | separators[2] == '\n' && | |
2538 | separators[3] == '\0'; | |
3185942a JA |
2539 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2540 | { | |
2541 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2542 | if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2543 | } | |
726f6388 | 2544 | |
3185942a | 2545 | s = *stringp; |
95732b49 JA |
2546 | slen = 0; |
2547 | ||
726f6388 JA |
2548 | /* Remove sequences of whitespace at the beginning of STRING, as |
2549 | long as those characters appear in IFS. */ | |
2550 | if (sh_style_split || !separators || !*separators) | |
2551 | { | |
7117c2d2 | 2552 | for (; *s && spctabnl (*s) && isifs (*s); s++); |
726f6388 JA |
2553 | |
2554 | /* If the string is nothing but whitespace, update it and return. */ | |
2555 | if (!*s) | |
2556 | { | |
2557 | *stringp = s; | |
2558 | if (endptr) | |
2559 | *endptr = s; | |
2560 | return ((char *)NULL); | |
2561 | } | |
2562 | } | |
2563 | ||
2564 | /* OK, S points to a word that does not begin with white space. | |
2565 | Now extract a word, stopping at a separator, save a pointer to | |
2566 | the first character after the word, then skip sequences of spc, | |
2567 | tab, or nl as long as they are separators. | |
ccc6cda3 | 2568 | |
726f6388 JA |
2569 | This obeys the field splitting rules in Posix.2. */ |
2570 | sindex = 0; | |
95732b49 JA |
2571 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2572 | unless multibyte chars are possible. */ | |
2573 | slen = (MB_CUR_MAX > 1) ? strlen (s) : 1; | |
3185942a | 2574 | current_word = string_extract_verbatim (s, slen, &sindex, separators, xflags); |
726f6388 JA |
2575 | |
2576 | /* Set ENDPTR to the first character after the end of the word. */ | |
2577 | if (endptr) | |
2578 | *endptr = s + sindex; | |
2579 | ||
28ef6c31 JA |
2580 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2581 | whitesep = s[sindex] && spctabnl (s[sindex]); | |
2582 | ||
726f6388 JA |
2583 | /* Move past the current separator character. */ |
2584 | if (s[sindex]) | |
95732b49 JA |
2585 | { |
2586 | DECLARE_MBSTATE; | |
2587 | ADVANCE_CHAR (s, slen, sindex); | |
2588 | } | |
726f6388 JA |
2589 | |
2590 | /* Now skip sequences of space, tab, or newline characters if they are | |
2591 | in the list of separators. */ | |
7117c2d2 | 2592 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) |
726f6388 JA |
2593 | sindex++; |
2594 | ||
28ef6c31 JA |
2595 | /* If the first separator was IFS whitespace and the current character is |
2596 | a non-whitespace IFS character, it should be part of the current field | |
2597 | delimiter, not a separate delimiter that would result in an empty field. | |
2598 | Look at POSIX.2, 3.6.5, (3)(b). */ | |
7117c2d2 | 2599 | if (s[sindex] && whitesep && isifs (s[sindex]) && !spctabnl (s[sindex])) |
95732b49 JA |
2600 | { |
2601 | sindex++; | |
2602 | /* An IFS character that is not IFS white space, along with any adjacent | |
2603 | IFS white space, shall delimit a field. */ | |
2604 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) | |
2605 | sindex++; | |
2606 | } | |
28ef6c31 | 2607 | |
726f6388 JA |
2608 | /* Update STRING to point to the next field. */ |
2609 | *stringp = s + sindex; | |
2610 | return (current_word); | |
2611 | } | |
2612 | ||
2613 | /* Remove IFS white space at the end of STRING. Start at the end | |
2614 | of the string and walk backwards until the beginning of the string | |
2615 | or we find a character that's not IFS white space and not CTLESC. | |
2616 | Only let CTLESC escape a white space character if SAW_ESCAPE is | |
2617 | non-zero. */ | |
2618 | char * | |
2619 | strip_trailing_ifs_whitespace (string, separators, saw_escape) | |
2620 | char *string, *separators; | |
2621 | int saw_escape; | |
2622 | { | |
2623 | char *s; | |
ccc6cda3 | 2624 | |
726f6388 | 2625 | s = string + STRLEN (string) - 1; |
7117c2d2 | 2626 | while (s > string && ((spctabnl (*s) && isifs (*s)) || |
726f6388 JA |
2627 | (saw_escape && *s == CTLESC && spctabnl (s[1])))) |
2628 | s--; | |
2629 | *++s = '\0'; | |
2630 | return string; | |
2631 | } | |
2632 | ||
bb70624e JA |
2633 | #if 0 |
2634 | /* UNUSED */ | |
2635 | /* Split STRING into words at whitespace. Obeys shell-style quoting with | |
2636 | backslashes, single and double quotes. */ | |
ccc6cda3 JA |
2637 | WORD_LIST * |
2638 | list_string_with_quotes (string) | |
2639 | char *string; | |
2640 | { | |
2641 | WORD_LIST *list; | |
2642 | char *token, *s; | |
7117c2d2 | 2643 | size_t s_len; |
ccc6cda3 JA |
2644 | int c, i, tokstart, len; |
2645 | ||
2646 | for (s = string; s && *s && spctabnl (*s); s++) | |
2647 | ; | |
2648 | if (s == 0 || *s == 0) | |
2649 | return ((WORD_LIST *)NULL); | |
2650 | ||
7117c2d2 | 2651 | s_len = strlen (s); |
ccc6cda3 JA |
2652 | tokstart = i = 0; |
2653 | list = (WORD_LIST *)NULL; | |
2654 | while (1) | |
2655 | { | |
2656 | c = s[i]; | |
2657 | if (c == '\\') | |
2658 | { | |
2659 | i++; | |
2660 | if (s[i]) | |
2661 | i++; | |
2662 | } | |
2663 | else if (c == '\'') | |
7117c2d2 | 2664 | i = skip_single_quoted (s, s_len, ++i); |
ccc6cda3 | 2665 | else if (c == '"') |
7117c2d2 | 2666 | i = skip_double_quoted (s, s_len, ++i); |
ccc6cda3 JA |
2667 | else if (c == 0 || spctabnl (c)) |
2668 | { | |
2669 | /* We have found the end of a token. Make a word out of it and | |
2670 | add it to the word list. */ | |
bb70624e | 2671 | token = substring (s, tokstart, i); |
cce855bc | 2672 | list = add_string_to_list (token, list); |
ccc6cda3 JA |
2673 | free (token); |
2674 | while (spctabnl (s[i])) | |
2675 | i++; | |
2676 | if (s[i]) | |
2677 | tokstart = i; | |
2678 | else | |
2679 | break; | |
2680 | } | |
2681 | else | |
2682 | i++; /* normal character */ | |
2683 | } | |
2684 | return (REVERSE_LIST (list, WORD_LIST *)); | |
2685 | } | |
bb70624e | 2686 | #endif |
d166f048 | 2687 | |
cce855bc JA |
2688 | /********************************************************/ |
2689 | /* */ | |
2690 | /* Functions to perform assignment statements */ | |
2691 | /* */ | |
2692 | /********************************************************/ | |
d166f048 | 2693 | |
95732b49 JA |
2694 | #if defined (ARRAY_VARS) |
2695 | static SHELL_VAR * | |
2696 | do_compound_assignment (name, value, flags) | |
2697 | char *name, *value; | |
2698 | int flags; | |
2699 | { | |
2700 | SHELL_VAR *v; | |
3185942a | 2701 | int mklocal, mkassoc; |
0628567a | 2702 | WORD_LIST *list; |
95732b49 JA |
2703 | |
2704 | mklocal = flags & ASS_MKLOCAL; | |
3185942a | 2705 | mkassoc = flags & ASS_MKASSOC; |
95732b49 JA |
2706 | |
2707 | if (mklocal && variable_context) | |
2708 | { | |
2709 | v = find_variable (name); | |
3185942a JA |
2710 | list = expand_compound_array_assignment (v, value, flags); |
2711 | if (mkassoc) | |
2712 | v = make_local_assoc_variable (name); | |
2713 | else if (v == 0 || (array_p (v) == 0 && assoc_p (v) == 0) || v->context != variable_context) | |
95732b49 | 2714 | v = make_local_array_variable (name); |
0628567a | 2715 | assign_compound_array_list (v, list, flags); |
95732b49 JA |
2716 | } |
2717 | else | |
2718 | v = assign_array_from_string (name, value, flags); | |
2719 | ||
2720 | return (v); | |
2721 | } | |
2722 | #endif | |
2723 | ||
726f6388 JA |
2724 | /* Given STRING, an assignment string, get the value of the right side |
2725 | of the `=', and bind it to the left side. If EXPAND is true, then | |
2726 | perform parameter expansion, command substitution, and arithmetic | |
2727 | expansion on the right-hand side. Perform tilde expansion in any | |
2728 | case. Do not perform word splitting on the result of expansion. */ | |
2729 | static int | |
95732b49 JA |
2730 | do_assignment_internal (word, expand) |
2731 | const WORD_DESC *word; | |
726f6388 JA |
2732 | int expand; |
2733 | { | |
495aee44 CR |
2734 | int offset, appendop, assign_list, aflags, retval; |
2735 | char *name, *value, *temp; | |
ccc6cda3 JA |
2736 | SHELL_VAR *entry; |
2737 | #if defined (ARRAY_VARS) | |
2738 | char *t; | |
b80f6443 | 2739 | int ni; |
ccc6cda3 | 2740 | #endif |
95732b49 | 2741 | const char *string; |
ccc6cda3 | 2742 | |
95732b49 JA |
2743 | if (word == 0 || word->word == 0) |
2744 | return 0; | |
2745 | ||
2746 | appendop = assign_list = aflags = 0; | |
2747 | string = word->word; | |
b80f6443 | 2748 | offset = assignment (string, 0); |
ccc6cda3 JA |
2749 | name = savestring (string); |
2750 | value = (char *)NULL; | |
726f6388 JA |
2751 | |
2752 | if (name[offset] == '=') | |
2753 | { | |
95732b49 JA |
2754 | if (name[offset - 1] == '+') |
2755 | { | |
2756 | appendop = 1; | |
2757 | name[offset - 1] = '\0'; | |
2758 | } | |
2759 | ||
2760 | name[offset] = 0; /* might need this set later */ | |
726f6388 JA |
2761 | temp = name + offset + 1; |
2762 | ||
ccc6cda3 | 2763 | #if defined (ARRAY_VARS) |
95732b49 | 2764 | if (expand && (word->flags & W_COMPASSIGN)) |
726f6388 | 2765 | { |
ccc6cda3 | 2766 | assign_list = ni = 1; |
95732b49 | 2767 | value = extract_array_assignment_list (temp, &ni); |
ccc6cda3 JA |
2768 | } |
2769 | else | |
2770 | #endif | |
ccc6cda3 | 2771 | if (expand && temp[0]) |
95732b49 | 2772 | value = expand_string_if_necessary (temp, 0, expand_string_assignment); |
726f6388 JA |
2773 | else |
2774 | value = savestring (temp); | |
2775 | } | |
2776 | ||
2777 | if (value == 0) | |
d166f048 | 2778 | { |
f73dda09 | 2779 | value = (char *)xmalloc (1); |
d166f048 JA |
2780 | value[0] = '\0'; |
2781 | } | |
726f6388 | 2782 | |
726f6388 | 2783 | if (echo_command_at_execute) |
95732b49 JA |
2784 | { |
2785 | if (appendop) | |
2786 | name[offset - 1] = '+'; | |
2787 | xtrace_print_assignment (name, value, assign_list, 1); | |
2788 | if (appendop) | |
2789 | name[offset - 1] = '\0'; | |
2790 | } | |
726f6388 | 2791 | |
d166f048 | 2792 | #define ASSIGN_RETURN(r) do { FREE (value); free (name); return (r); } while (0) |
ccc6cda3 | 2793 | |
95732b49 JA |
2794 | if (appendop) |
2795 | aflags |= ASS_APPEND; | |
2796 | ||
ccc6cda3 | 2797 | #if defined (ARRAY_VARS) |
0001803f | 2798 | if (t = mbschr (name, '[')) /*]*/ |
ccc6cda3 JA |
2799 | { |
2800 | if (assign_list) | |
2801 | { | |
b80f6443 | 2802 | report_error (_("%s: cannot assign list to array member"), name); |
ccc6cda3 JA |
2803 | ASSIGN_RETURN (0); |
2804 | } | |
95732b49 | 2805 | entry = assign_array_element (name, value, aflags); |
ccc6cda3 | 2806 | if (entry == 0) |
28ef6c31 | 2807 | ASSIGN_RETURN (0); |
ccc6cda3 JA |
2808 | } |
2809 | else if (assign_list) | |
95732b49 | 2810 | { |
6f5ac32d | 2811 | if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL) == 0) |
95732b49 | 2812 | aflags |= ASS_MKLOCAL; |
3185942a JA |
2813 | if (word->flags & W_ASSIGNASSOC) |
2814 | aflags |= ASS_MKASSOC; | |
95732b49 JA |
2815 | entry = do_compound_assignment (name, value, aflags); |
2816 | } | |
ccc6cda3 JA |
2817 | else |
2818 | #endif /* ARRAY_VARS */ | |
95732b49 | 2819 | entry = bind_variable (name, value, aflags); |
ccc6cda3 | 2820 | |
726f6388 JA |
2821 | stupidly_hack_special_variables (name); |
2822 | ||
3185942a JA |
2823 | #if 1 |
2824 | /* Return 1 if the assignment seems to have been performed correctly. */ | |
2825 | if (entry == 0 || readonly_p (entry)) | |
2826 | retval = 0; /* assignment failure */ | |
2827 | else if (noassign_p (entry)) | |
2828 | { | |
2829 | last_command_exit_value = EXECUTION_FAILURE; | |
2830 | retval = 1; /* error status, but not assignment failure */ | |
2831 | } | |
2832 | else | |
2833 | retval = 1; | |
2834 | ||
2835 | if (entry && retval != 0 && noassign_p (entry) == 0) | |
2836 | VUNSETATTR (entry, att_invisible); | |
2837 | ||
2838 | ASSIGN_RETURN (retval); | |
2839 | #else | |
726f6388 | 2840 | if (entry) |
bb70624e | 2841 | VUNSETATTR (entry, att_invisible); |
726f6388 | 2842 | |
28ef6c31 | 2843 | ASSIGN_RETURN (entry ? ((readonly_p (entry) == 0) && noassign_p (entry) == 0) : 0); |
3185942a | 2844 | #endif |
726f6388 JA |
2845 | } |
2846 | ||
2847 | /* Perform the assignment statement in STRING, and expand the | |
95732b49 | 2848 | right side by doing tilde, command and parameter expansion. */ |
ccc6cda3 | 2849 | int |
726f6388 | 2850 | do_assignment (string) |
95732b49 | 2851 | char *string; |
726f6388 | 2852 | { |
95732b49 JA |
2853 | WORD_DESC td; |
2854 | ||
2855 | td.flags = W_ASSIGNMENT; | |
2856 | td.word = string; | |
2857 | ||
2858 | return do_assignment_internal (&td, 1); | |
2859 | } | |
2860 | ||
2861 | int | |
495aee44 | 2862 | do_word_assignment (word, flags) |
95732b49 | 2863 | WORD_DESC *word; |
495aee44 | 2864 | int flags; |
95732b49 JA |
2865 | { |
2866 | return do_assignment_internal (word, 1); | |
726f6388 JA |
2867 | } |
2868 | ||
2869 | /* Given STRING, an assignment string, get the value of the right side | |
95732b49 JA |
2870 | of the `=', and bind it to the left side. Do not perform any word |
2871 | expansions on the right hand side. */ | |
ccc6cda3 | 2872 | int |
726f6388 | 2873 | do_assignment_no_expand (string) |
95732b49 | 2874 | char *string; |
726f6388 | 2875 | { |
95732b49 JA |
2876 | WORD_DESC td; |
2877 | ||
2878 | td.flags = W_ASSIGNMENT; | |
2879 | td.word = string; | |
2880 | ||
2881 | return (do_assignment_internal (&td, 0)); | |
726f6388 JA |
2882 | } |
2883 | ||
cce855bc JA |
2884 | /*************************************************** |
2885 | * * | |
2886 | * Functions to manage the positional parameters * | |
2887 | * * | |
2888 | ***************************************************/ | |
726f6388 JA |
2889 | |
2890 | /* Return the word list that corresponds to `$*'. */ | |
2891 | WORD_LIST * | |
2892 | list_rest_of_args () | |
2893 | { | |
ccc6cda3 | 2894 | register WORD_LIST *list, *args; |
726f6388 JA |
2895 | int i; |
2896 | ||
2897 | /* Break out of the loop as soon as one of the dollar variables is null. */ | |
ccc6cda3 JA |
2898 | for (i = 1, list = (WORD_LIST *)NULL; i < 10 && dollar_vars[i]; i++) |
2899 | list = make_word_list (make_bare_word (dollar_vars[i]), list); | |
2900 | ||
2901 | for (args = rest_of_args; args; args = args->next) | |
2902 | list = make_word_list (make_bare_word (args->word->word), list); | |
726f6388 | 2903 | |
726f6388 JA |
2904 | return (REVERSE_LIST (list, WORD_LIST *)); |
2905 | } | |
2906 | ||
ccc6cda3 JA |
2907 | int |
2908 | number_of_args () | |
2909 | { | |
2910 | register WORD_LIST *list; | |
2911 | int n; | |
2912 | ||
2913 | for (n = 0; n < 9 && dollar_vars[n+1]; n++) | |
2914 | ; | |
2915 | for (list = rest_of_args; list; list = list->next) | |
2916 | n++; | |
2917 | return n; | |
2918 | } | |
2919 | ||
cce855bc JA |
2920 | /* Return the value of a positional parameter. This handles values > 10. */ |
2921 | char * | |
2922 | get_dollar_var_value (ind) | |
7117c2d2 | 2923 | intmax_t ind; |
cce855bc JA |
2924 | { |
2925 | char *temp; | |
2926 | WORD_LIST *p; | |
2927 | ||
2928 | if (ind < 10) | |
2929 | temp = dollar_vars[ind] ? savestring (dollar_vars[ind]) : (char *)NULL; | |
2930 | else /* We want something like ${11} */ | |
2931 | { | |
2932 | ind -= 10; | |
2933 | for (p = rest_of_args; p && ind--; p = p->next) | |
28ef6c31 | 2934 | ; |
cce855bc JA |
2935 | temp = p ? savestring (p->word->word) : (char *)NULL; |
2936 | } | |
2937 | return (temp); | |
2938 | } | |
2939 | ||
726f6388 JA |
2940 | /* Make a single large string out of the dollar digit variables, |
2941 | and the rest_of_args. If DOLLAR_STAR is 1, then obey the special | |
2942 | case of "$*" with respect to IFS. */ | |
2943 | char * | |
2944 | string_rest_of_args (dollar_star) | |
2945 | int dollar_star; | |
2946 | { | |
ccc6cda3 | 2947 | register WORD_LIST *list; |
726f6388 JA |
2948 | char *string; |
2949 | ||
ccc6cda3 | 2950 | list = list_rest_of_args (); |
726f6388 JA |
2951 | string = dollar_star ? string_list_dollar_star (list) : string_list (list); |
2952 | dispose_words (list); | |
2953 | return (string); | |
2954 | } | |
2955 | ||
cce855bc JA |
2956 | /* Return a string containing the positional parameters from START to |
2957 | END, inclusive. If STRING[0] == '*', we obey the rules for $*, | |
7117c2d2 JA |
2958 | which only makes a difference if QUOTED is non-zero. If QUOTED includes |
2959 | Q_HERE_DOCUMENT or Q_DOUBLE_QUOTES, this returns a quoted list, otherwise | |
2960 | no quoting chars are added. */ | |
cce855bc JA |
2961 | static char * |
2962 | pos_params (string, start, end, quoted) | |
2963 | char *string; | |
2964 | int start, end, quoted; | |
726f6388 | 2965 | { |
cce855bc JA |
2966 | WORD_LIST *save, *params, *h, *t; |
2967 | char *ret; | |
2968 | int i; | |
726f6388 | 2969 | |
bb70624e JA |
2970 | /* see if we can short-circuit. if start == end, we want 0 parameters. */ |
2971 | if (start == end) | |
2972 | return ((char *)NULL); | |
2973 | ||
cce855bc JA |
2974 | save = params = list_rest_of_args (); |
2975 | if (save == 0) | |
2976 | return ((char *)NULL); | |
2977 | ||
3185942a JA |
2978 | if (start == 0) /* handle ${@:0[:x]} specially */ |
2979 | { | |
2980 | t = make_word_list (make_word (dollar_vars[0]), params); | |
2981 | save = params = t; | |
2982 | } | |
2983 | ||
0001803f | 2984 | for (i = start ? 1 : 0; params && i < start; i++) |
cce855bc JA |
2985 | params = params->next; |
2986 | if (params == 0) | |
2987 | return ((char *)NULL); | |
2988 | for (h = t = params; params && i < end; i++) | |
d166f048 | 2989 | { |
cce855bc JA |
2990 | t = params; |
2991 | params = params->next; | |
d166f048 | 2992 | } |
726f6388 | 2993 | |
cce855bc | 2994 | t->next = (WORD_LIST *)NULL; |
3185942a JA |
2995 | |
2996 | ret = string_list_pos_params (string[0], h, quoted); | |
2997 | ||
bb70624e JA |
2998 | if (t != params) |
2999 | t->next = params; | |
726f6388 | 3000 | |
cce855bc JA |
3001 | dispose_words (save); |
3002 | return (ret); | |
3003 | } | |
3004 | ||
3005 | /******************************************************************/ | |
3006 | /* */ | |
3007 | /* Functions to expand strings to strings or WORD_LISTs */ | |
3008 | /* */ | |
3009 | /******************************************************************/ | |
3010 | ||
3011 | #if defined (PROCESS_SUBSTITUTION) | |
95732b49 | 3012 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == '<' || s == '>' || s == CTLESC || s == '~') |
cce855bc | 3013 | #else |
95732b49 | 3014 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == CTLESC || s == '~') |
cce855bc JA |
3015 | #endif |
3016 | ||
3017 | /* If there are any characters in STRING that require full expansion, | |
3018 | then call FUNC to expand STRING; otherwise just perform quote | |
3019 | removal if necessary. This returns a new string. */ | |
3020 | static char * | |
f73dda09 | 3021 | expand_string_if_necessary (string, quoted, func) |
cce855bc JA |
3022 | char *string; |
3023 | int quoted; | |
f73dda09 | 3024 | EXPFUNC *func; |
cce855bc JA |
3025 | { |
3026 | WORD_LIST *list; | |
7117c2d2 | 3027 | size_t slen; |
cce855bc JA |
3028 | int i, saw_quote; |
3029 | char *ret; | |
7117c2d2 | 3030 | DECLARE_MBSTATE; |
cce855bc | 3031 | |
95732b49 JA |
3032 | /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */ |
3033 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 0; | |
7117c2d2 JA |
3034 | i = saw_quote = 0; |
3035 | while (string[i]) | |
cce855bc JA |
3036 | { |
3037 | if (EXP_CHAR (string[i])) | |
3038 | break; | |
3039 | else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"') | |
3040 | saw_quote = 1; | |
7117c2d2 | 3041 | ADVANCE_CHAR (string, slen, i); |
cce855bc JA |
3042 | } |
3043 | ||
3044 | if (string[i]) | |
3045 | { | |
3046 | list = (*func) (string, quoted); | |
3047 | if (list) | |
3048 | { | |
3049 | ret = string_list (list); | |
3050 | dispose_words (list); | |
3051 | } | |
3052 | else | |
3053 | ret = (char *)NULL; | |
3054 | } | |
3055 | else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
3056 | ret = string_quote_removal (string, quoted); | |
3057 | else | |
3058 | ret = savestring (string); | |
7117c2d2 | 3059 | |
cce855bc JA |
3060 | return ret; |
3061 | } | |
3062 | ||
3063 | static inline char * | |
f73dda09 | 3064 | expand_string_to_string_internal (string, quoted, func) |
cce855bc JA |
3065 | char *string; |
3066 | int quoted; | |
f73dda09 | 3067 | EXPFUNC *func; |
cce855bc JA |
3068 | { |
3069 | WORD_LIST *list; | |
3070 | char *ret; | |
3071 | ||
3072 | if (string == 0 || *string == '\0') | |
3073 | return ((char *)NULL); | |
3074 | ||
3075 | list = (*func) (string, quoted); | |
3076 | if (list) | |
3077 | { | |
3078 | ret = string_list (list); | |
3079 | dispose_words (list); | |
3080 | } | |
3081 | else | |
3082 | ret = (char *)NULL; | |
3083 | ||
3084 | return (ret); | |
3085 | } | |
3086 | ||
f73dda09 JA |
3087 | char * |
3088 | expand_string_to_string (string, quoted) | |
3089 | char *string; | |
3090 | int quoted; | |
3091 | { | |
3092 | return (expand_string_to_string_internal (string, quoted, expand_string)); | |
3093 | } | |
3094 | ||
3095 | char * | |
3096 | expand_string_unsplit_to_string (string, quoted) | |
3097 | char *string; | |
3098 | int quoted; | |
3099 | { | |
3100 | return (expand_string_to_string_internal (string, quoted, expand_string_unsplit)); | |
3101 | } | |
3102 | ||
95732b49 JA |
3103 | char * |
3104 | expand_assignment_string_to_string (string, quoted) | |
3105 | char *string; | |
3106 | int quoted; | |
3107 | { | |
3108 | return (expand_string_to_string_internal (string, quoted, expand_string_assignment)); | |
3109 | } | |
3110 | ||
0628567a JA |
3111 | char * |
3112 | expand_arith_string (string, quoted) | |
3113 | char *string; | |
3185942a | 3114 | int quoted; |
0628567a JA |
3115 | { |
3116 | return (expand_string_if_necessary (string, quoted, expand_string)); | |
3117 | } | |
3118 | ||
cce855bc JA |
3119 | #if defined (COND_COMMAND) |
3120 | /* Just remove backslashes in STRING. Returns a new string. */ | |
3121 | char * | |
3122 | remove_backslashes (string) | |
3123 | char *string; | |
3124 | { | |
3125 | char *r, *ret, *s; | |
3126 | ||
f73dda09 | 3127 | r = ret = (char *)xmalloc (strlen (string) + 1); |
cce855bc JA |
3128 | for (s = string; s && *s; ) |
3129 | { | |
3130 | if (*s == '\\') | |
28ef6c31 | 3131 | s++; |
cce855bc | 3132 | if (*s == 0) |
28ef6c31 | 3133 | break; |
cce855bc JA |
3134 | *r++ = *s++; |
3135 | } | |
3136 | *r = '\0'; | |
3137 | return ret; | |
3138 | } | |
3139 | ||
3140 | /* This needs better error handling. */ | |
3141 | /* Expand W for use as an argument to a unary or binary operator in a | |
f1be666c | 3142 | [[...]] expression. If SPECIAL is 1, this is the rhs argument |
cce855bc | 3143 | to the != or == operator, and should be treated as a pattern. In |
f1be666c JA |
3144 | this case, we quote the string specially for the globbing code. If |
3145 | SPECIAL is 2, this is an rhs argument for the =~ operator, and should | |
3146 | be quoted appropriately for regcomp/regexec. The caller is responsible | |
3147 | for removing the backslashes if the unquoted word is needed later. */ | |
cce855bc JA |
3148 | char * |
3149 | cond_expand_word (w, special) | |
3150 | WORD_DESC *w; | |
3151 | int special; | |
3152 | { | |
3153 | char *r, *p; | |
3154 | WORD_LIST *l; | |
f1be666c | 3155 | int qflags; |
cce855bc JA |
3156 | |
3157 | if (w->word == 0 || w->word[0] == '\0') | |
3158 | return ((char *)NULL); | |
3159 | ||
0001803f | 3160 | w->flags |= W_NOSPLIT2; |
b72432fd | 3161 | l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0); |
cce855bc JA |
3162 | if (l) |
3163 | { | |
3164 | if (special == 0) | |
3165 | { | |
3166 | dequote_list (l); | |
3167 | r = string_list (l); | |
3168 | } | |
3169 | else | |
28ef6c31 | 3170 | { |
f1be666c JA |
3171 | qflags = QGLOB_CVTNULL; |
3172 | if (special == 2) | |
3173 | qflags |= QGLOB_REGEXP; | |
28ef6c31 | 3174 | p = string_list (l); |
f1be666c | 3175 | r = quote_string_for_globbing (p, qflags); |
28ef6c31 JA |
3176 | free (p); |
3177 | } | |
cce855bc JA |
3178 | dispose_words (l); |
3179 | } | |
3180 | else | |
3181 | r = (char *)NULL; | |
3182 | ||
3183 | return r; | |
3184 | } | |
3185 | #endif | |
3186 | ||
3187 | /* Call expand_word_internal to expand W and handle error returns. | |
3188 | A convenience function for functions that don't want to handle | |
3189 | any errors or free any memory before aborting. */ | |
3190 | static WORD_LIST * | |
b72432fd | 3191 | call_expand_word_internal (w, q, i, c, e) |
cce855bc | 3192 | WORD_DESC *w; |
b72432fd | 3193 | int q, i, *c, *e; |
cce855bc JA |
3194 | { |
3195 | WORD_LIST *result; | |
3196 | ||
b72432fd | 3197 | result = expand_word_internal (w, q, i, c, e); |
bb70624e | 3198 | if (result == &expand_word_error || result == &expand_word_fatal) |
cce855bc JA |
3199 | { |
3200 | /* By convention, each time this error is returned, w->word has | |
bb70624e JA |
3201 | already been freed (it sometimes may not be in the fatal case, |
3202 | but that doesn't result in a memory leak because we're going | |
3203 | to exit in most cases). */ | |
cce855bc | 3204 | w->word = (char *)NULL; |
28ef6c31 | 3205 | last_command_exit_value = EXECUTION_FAILURE; |
b80f6443 | 3206 | exp_jump_to_top_level ((result == &expand_word_error) ? DISCARD : FORCE_EOF); |
cce855bc JA |
3207 | /* NOTREACHED */ |
3208 | } | |
cce855bc JA |
3209 | else |
3210 | return (result); | |
3211 | } | |
3212 | ||
3213 | /* Perform parameter expansion, command substitution, and arithmetic | |
3214 | expansion on STRING, as if it were a word. Leave the result quoted. */ | |
3215 | static WORD_LIST * | |
3216 | expand_string_internal (string, quoted) | |
3217 | char *string; | |
3218 | int quoted; | |
3219 | { | |
3220 | WORD_DESC td; | |
3221 | WORD_LIST *tresult; | |
3222 | ||
3223 | if (string == 0 || *string == 0) | |
3224 | return ((WORD_LIST *)NULL); | |
3225 | ||
28ef6c31 JA |
3226 | td.flags = 0; |
3227 | td.word = savestring (string); | |
3228 | ||
b72432fd | 3229 | tresult = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3230 | |
3231 | FREE (td.word); | |
cce855bc | 3232 | return (tresult); |
726f6388 JA |
3233 | } |
3234 | ||
3235 | /* Expand STRING by performing parameter expansion, command substitution, | |
3236 | and arithmetic expansion. Dequote the resulting WORD_LIST before | |
3237 | returning it, but do not perform word splitting. The call to | |
3238 | remove_quoted_nulls () is in here because word splitting normally | |
3239 | takes care of quote removal. */ | |
3240 | WORD_LIST * | |
3241 | expand_string_unsplit (string, quoted) | |
3242 | char *string; | |
3243 | int quoted; | |
3244 | { | |
3245 | WORD_LIST *value; | |
3246 | ||
28ef6c31 | 3247 | if (string == 0 || *string == '\0') |
726f6388 JA |
3248 | return ((WORD_LIST *)NULL); |
3249 | ||
28ef6c31 | 3250 | expand_no_split_dollar_star = 1; |
726f6388 | 3251 | value = expand_string_internal (string, quoted); |
28ef6c31 JA |
3252 | expand_no_split_dollar_star = 0; |
3253 | ||
726f6388 JA |
3254 | if (value) |
3255 | { | |
3256 | if (value->word) | |
95732b49 JA |
3257 | { |
3258 | remove_quoted_nulls (value->word->word); | |
3259 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3260 | } | |
3261 | dequote_list (value); | |
3262 | } | |
3263 | return (value); | |
3264 | } | |
3265 | ||
3266 | /* Expand the rhs of an assignment statement */ | |
3267 | WORD_LIST * | |
3268 | expand_string_assignment (string, quoted) | |
3269 | char *string; | |
3270 | int quoted; | |
3271 | { | |
3272 | WORD_DESC td; | |
3273 | WORD_LIST *value; | |
3274 | ||
3275 | if (string == 0 || *string == '\0') | |
3276 | return ((WORD_LIST *)NULL); | |
3277 | ||
3278 | expand_no_split_dollar_star = 1; | |
3279 | ||
3280 | td.flags = W_ASSIGNRHS; | |
3281 | td.word = savestring (string); | |
3282 | value = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); | |
3283 | FREE (td.word); | |
3284 | ||
3285 | expand_no_split_dollar_star = 0; | |
3286 | ||
3287 | if (value) | |
3288 | { | |
3289 | if (value->word) | |
3290 | { | |
3291 | remove_quoted_nulls (value->word->word); | |
3292 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3293 | } | |
726f6388 JA |
3294 | dequote_list (value); |
3295 | } | |
3296 | return (value); | |
3297 | } | |
3298 | ||
bb70624e JA |
3299 | |
3300 | /* Expand one of the PS? prompt strings. This is a sort of combination of | |
3301 | expand_string_unsplit and expand_string_internal, but returns the | |
3302 | passed string when an error occurs. Might want to trap other calls | |
3303 | to jump_to_top_level here so we don't endlessly loop. */ | |
3304 | WORD_LIST * | |
f1be666c | 3305 | expand_prompt_string (string, quoted, wflags) |
bb70624e JA |
3306 | char *string; |
3307 | int quoted; | |
f1be666c | 3308 | int wflags; |
bb70624e JA |
3309 | { |
3310 | WORD_LIST *value; | |
3311 | WORD_DESC td; | |
3312 | ||
3313 | if (string == 0 || *string == 0) | |
3314 | return ((WORD_LIST *)NULL); | |
3315 | ||
f1be666c | 3316 | td.flags = wflags; |
bb70624e | 3317 | td.word = savestring (string); |
28ef6c31 JA |
3318 | |
3319 | no_longjmp_on_fatal_error = 1; | |
bb70624e | 3320 | value = expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3321 | no_longjmp_on_fatal_error = 0; |
3322 | ||
bb70624e JA |
3323 | if (value == &expand_word_error || value == &expand_word_fatal) |
3324 | { | |
3325 | value = make_word_list (make_bare_word (string), (WORD_LIST *)NULL); | |
3326 | return value; | |
3327 | } | |
3328 | FREE (td.word); | |
3329 | if (value) | |
3330 | { | |
3331 | if (value->word) | |
95732b49 JA |
3332 | { |
3333 | remove_quoted_nulls (value->word->word); | |
3334 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3335 | } | |
bb70624e JA |
3336 | dequote_list (value); |
3337 | } | |
3338 | return (value); | |
3339 | } | |
3340 | ||
726f6388 JA |
3341 | /* Expand STRING just as if you were expanding a word, but do not dequote |
3342 | the resultant WORD_LIST. This is called only from within this file, | |
3343 | and is used to correctly preserve quoted characters when expanding | |
3344 | things like ${1+"$@"}. This does parameter expansion, command | |
b72432fd | 3345 | substitution, arithmetic expansion, and word splitting. */ |
726f6388 JA |
3346 | static WORD_LIST * |
3347 | expand_string_leave_quoted (string, quoted) | |
3348 | char *string; | |
3349 | int quoted; | |
3350 | { | |
3351 | WORD_LIST *tlist; | |
3352 | WORD_LIST *tresult; | |
3353 | ||
ccc6cda3 | 3354 | if (string == 0 || *string == '\0') |
726f6388 JA |
3355 | return ((WORD_LIST *)NULL); |
3356 | ||
3357 | tlist = expand_string_internal (string, quoted); | |
3358 | ||
3359 | if (tlist) | |
3360 | { | |
3361 | tresult = word_list_split (tlist); | |
3362 | dispose_words (tlist); | |
3363 | return (tresult); | |
3364 | } | |
3365 | return ((WORD_LIST *)NULL); | |
3366 | } | |
3367 | ||
ccc6cda3 JA |
3368 | /* This does not perform word splitting or dequote the WORD_LIST |
3369 | it returns. */ | |
3370 | static WORD_LIST * | |
3371 | expand_string_for_rhs (string, quoted, dollar_at_p, has_dollar_at) | |
3372 | char *string; | |
3373 | int quoted, *dollar_at_p, *has_dollar_at; | |
3374 | { | |
3375 | WORD_DESC td; | |
3376 | WORD_LIST *tresult; | |
3377 | ||
3378 | if (string == 0 || *string == '\0') | |
3379 | return (WORD_LIST *)NULL; | |
3380 | ||
aeb26a67 | 3381 | td.flags = W_NOSPLIT2; /* no splitting, remove "" and '' */ |
ccc6cda3 | 3382 | td.word = string; |
b72432fd | 3383 | tresult = call_expand_word_internal (&td, quoted, 1, dollar_at_p, has_dollar_at); |
ccc6cda3 JA |
3384 | return (tresult); |
3385 | } | |
3386 | ||
726f6388 JA |
3387 | /* Expand STRING just as if you were expanding a word. This also returns |
3388 | a list of words. Note that filename globbing is *NOT* done for word | |
3389 | or string expansion, just when the shell is expanding a command. This | |
3390 | does parameter expansion, command substitution, arithmetic expansion, | |
3391 | and word splitting. Dequote the resultant WORD_LIST before returning. */ | |
3392 | WORD_LIST * | |
3393 | expand_string (string, quoted) | |
3394 | char *string; | |
3395 | int quoted; | |
3396 | { | |
3397 | WORD_LIST *result; | |
3398 | ||
28ef6c31 | 3399 | if (string == 0 || *string == '\0') |
726f6388 JA |
3400 | return ((WORD_LIST *)NULL); |
3401 | ||
3402 | result = expand_string_leave_quoted (string, quoted); | |
ccc6cda3 | 3403 | return (result ? dequote_list (result) : result); |
726f6388 JA |
3404 | } |
3405 | ||
3406 | /*************************************************** | |
3407 | * * | |
3408 | * Functions to handle quoting chars * | |
3409 | * * | |
3410 | ***************************************************/ | |
3411 | ||
cce855bc JA |
3412 | /* Conventions: |
3413 | ||
3414 | A string with s[0] == CTLNUL && s[1] == 0 is a quoted null string. | |
3415 | The parser passes CTLNUL as CTLESC CTLNUL. */ | |
3416 | ||
cce855bc JA |
3417 | /* Quote escape characters in string s, but no other characters. This is |
3418 | used to protect CTLESC and CTLNUL in variable values from the rest of | |
3185942a JA |
3419 | the word expansion process after the variable is expanded (word splitting |
3420 | and filename generation). If IFS is null, we quote spaces as well, just | |
3421 | in case we split on spaces later (in the case of unquoted $@, we will | |
3422 | eventually attempt to split the entire word on spaces). Corresponding | |
3423 | code exists in dequote_escapes. Even if we don't end up splitting on | |
3424 | spaces, quoting spaces is not a problem. This should never be called on | |
3425 | a string that is quoted with single or double quotes or part of a here | |
3426 | document (effectively double-quoted). */ | |
f73dda09 | 3427 | char * |
cce855bc JA |
3428 | quote_escapes (string) |
3429 | char *string; | |
3430 | { | |
3431 | register char *s, *t; | |
7117c2d2 JA |
3432 | size_t slen; |
3433 | char *result, *send; | |
3185942a | 3434 | int quote_spaces, skip_ctlesc, skip_ctlnul; |
7117c2d2 | 3435 | DECLARE_MBSTATE; |
cce855bc | 3436 | |
7117c2d2 JA |
3437 | slen = strlen (string); |
3438 | send = string + slen; | |
3439 | ||
f1be666c | 3440 | quote_spaces = (ifs_value && *ifs_value == 0); |
3185942a JA |
3441 | |
3442 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) | |
3443 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
3444 | ||
7117c2d2 JA |
3445 | t = result = (char *)xmalloc ((slen * 2) + 1); |
3446 | s = string; | |
3447 | ||
3448 | while (*s) | |
cce855bc | 3449 | { |
3185942a | 3450 | if ((skip_ctlesc == 0 && *s == CTLESC) || (skip_ctlnul == 0 && *s == CTLNUL) || (quote_spaces && *s == ' ')) |
cce855bc | 3451 | *t++ = CTLESC; |
7117c2d2 | 3452 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3453 | } |
3454 | *t = '\0'; | |
3455 | return (result); | |
3456 | } | |
3457 | ||
3458 | static WORD_LIST * | |
3459 | list_quote_escapes (list) | |
3460 | WORD_LIST *list; | |
3461 | { | |
3462 | register WORD_LIST *w; | |
3463 | char *t; | |
3464 | ||
3465 | for (w = list; w; w = w->next) | |
3466 | { | |
3467 | t = w->word->word; | |
3468 | w->word->word = quote_escapes (t); | |
3469 | free (t); | |
3470 | } | |
3471 | return list; | |
3472 | } | |
3473 | ||
7117c2d2 JA |
3474 | /* Inverse of quote_escapes; remove CTLESC protecting CTLESC or CTLNUL. |
3475 | ||
3476 | The parser passes us CTLESC as CTLESC CTLESC and CTLNUL as CTLESC CTLNUL. | |
3477 | This is necessary to make unquoted CTLESC and CTLNUL characters in the | |
3478 | data stream pass through properly. | |
3479 | ||
3480 | We need to remove doubled CTLESC characters inside quoted strings before | |
3481 | quoting the entire string, so we do not double the number of CTLESC | |
3482 | characters. | |
3483 | ||
3484 | Also used by parts of the pattern substitution code. */ | |
3185942a | 3485 | char * |
cce855bc JA |
3486 | dequote_escapes (string) |
3487 | char *string; | |
3488 | { | |
3185942a | 3489 | register char *s, *t, *s1; |
7117c2d2 JA |
3490 | size_t slen; |
3491 | char *result, *send; | |
f1be666c | 3492 | int quote_spaces; |
7117c2d2 | 3493 | DECLARE_MBSTATE; |
cce855bc | 3494 | |
7117c2d2 JA |
3495 | if (string == 0) |
3496 | return string; | |
3497 | ||
3498 | slen = strlen (string); | |
3499 | send = string + slen; | |
3500 | ||
3501 | t = result = (char *)xmalloc (slen + 1); | |
7117c2d2 JA |
3502 | |
3503 | if (strchr (string, CTLESC) == 0) | |
3185942a | 3504 | return (strcpy (result, string)); |
7117c2d2 | 3505 | |
f1be666c | 3506 | quote_spaces = (ifs_value && *ifs_value == 0); |
3185942a JA |
3507 | |
3508 | s = string; | |
7117c2d2 | 3509 | while (*s) |
cce855bc | 3510 | { |
f1be666c | 3511 | if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' '))) |
cce855bc JA |
3512 | { |
3513 | s++; | |
3514 | if (*s == '\0') | |
3515 | break; | |
3516 | } | |
7117c2d2 | 3517 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3518 | } |
3519 | *t = '\0'; | |
3520 | return result; | |
3521 | } | |
726f6388 | 3522 | |
0628567a JA |
3523 | /* Return a new string with the quoted representation of character C. |
3524 | This turns "" into QUOTED_NULL, so the W_HASQUOTEDNULL flag needs to be | |
3525 | set in any resultant WORD_DESC where this value is the word. */ | |
726f6388 JA |
3526 | static char * |
3527 | make_quoted_char (c) | |
3528 | int c; | |
3529 | { | |
3530 | char *temp; | |
3531 | ||
f73dda09 | 3532 | temp = (char *)xmalloc (3); |
726f6388 JA |
3533 | if (c == 0) |
3534 | { | |
3535 | temp[0] = CTLNUL; | |
3536 | temp[1] = '\0'; | |
3537 | } | |
3538 | else | |
3539 | { | |
3540 | temp[0] = CTLESC; | |
3541 | temp[1] = c; | |
3542 | temp[2] = '\0'; | |
3543 | } | |
3544 | return (temp); | |
3545 | } | |
3546 | ||
0628567a JA |
3547 | /* Quote STRING, returning a new string. This turns "" into QUOTED_NULL, so |
3548 | the W_HASQUOTEDNULL flag needs to be set in any resultant WORD_DESC where | |
3549 | this value is the word. */ | |
ccc6cda3 | 3550 | char * |
726f6388 JA |
3551 | quote_string (string) |
3552 | char *string; | |
3553 | { | |
ccc6cda3 | 3554 | register char *t; |
7117c2d2 JA |
3555 | size_t slen; |
3556 | char *result, *send; | |
726f6388 | 3557 | |
ccc6cda3 | 3558 | if (*string == 0) |
726f6388 | 3559 | { |
f73dda09 | 3560 | result = (char *)xmalloc (2); |
726f6388 JA |
3561 | result[0] = CTLNUL; |
3562 | result[1] = '\0'; | |
3563 | } | |
3564 | else | |
3565 | { | |
7117c2d2 | 3566 | DECLARE_MBSTATE; |
726f6388 | 3567 | |
7117c2d2 JA |
3568 | slen = strlen (string); |
3569 | send = string + slen; | |
3570 | ||
3571 | result = (char *)xmalloc ((slen * 2) + 1); | |
3572 | ||
3573 | for (t = result; string < send; ) | |
726f6388 JA |
3574 | { |
3575 | *t++ = CTLESC; | |
7117c2d2 | 3576 | COPY_CHAR_P (t, string, send); |
726f6388 JA |
3577 | } |
3578 | *t = '\0'; | |
3579 | } | |
3580 | return (result); | |
3581 | } | |
3582 | ||
0628567a | 3583 | /* De-quote quoted characters in STRING. */ |
726f6388 JA |
3584 | char * |
3585 | dequote_string (string) | |
3586 | char *string; | |
3587 | { | |
7117c2d2 JA |
3588 | register char *s, *t; |
3589 | size_t slen; | |
3590 | char *result, *send; | |
3591 | DECLARE_MBSTATE; | |
726f6388 | 3592 | |
7117c2d2 JA |
3593 | slen = strlen (string); |
3594 | ||
3595 | t = result = (char *)xmalloc (slen + 1); | |
726f6388 JA |
3596 | |
3597 | if (QUOTED_NULL (string)) | |
3598 | { | |
3599 | result[0] = '\0'; | |
3600 | return (result); | |
3601 | } | |
3602 | ||
3603 | /* If no character in the string can be quoted, don't bother examining | |
3604 | each character. Just return a copy of the string passed to us. */ | |
7117c2d2 JA |
3605 | if (strchr (string, CTLESC) == NULL) |
3606 | return (strcpy (result, string)); | |
726f6388 | 3607 | |
7117c2d2 JA |
3608 | send = string + slen; |
3609 | s = string; | |
3610 | while (*s) | |
726f6388 | 3611 | { |
7117c2d2 | 3612 | if (*s == CTLESC) |
726f6388 | 3613 | { |
7117c2d2 JA |
3614 | s++; |
3615 | if (*s == '\0') | |
726f6388 JA |
3616 | break; |
3617 | } | |
7117c2d2 | 3618 | COPY_CHAR_P (t, s, send); |
726f6388 JA |
3619 | } |
3620 | ||
3621 | *t = '\0'; | |
3622 | return (result); | |
3623 | } | |
3624 | ||
3625 | /* Quote the entire WORD_LIST list. */ | |
ccc6cda3 | 3626 | static WORD_LIST * |
726f6388 JA |
3627 | quote_list (list) |
3628 | WORD_LIST *list; | |
3629 | { | |
3630 | register WORD_LIST *w; | |
ccc6cda3 | 3631 | char *t; |
726f6388 JA |
3632 | |
3633 | for (w = list; w; w = w->next) | |
3634 | { | |
ccc6cda3 | 3635 | t = w->word->word; |
726f6388 | 3636 | w->word->word = quote_string (t); |
3185942a JA |
3637 | if (*t == 0) |
3638 | w->word->flags |= W_HASQUOTEDNULL; /* XXX - turn on W_HASQUOTEDNULL here? */ | |
ccc6cda3 | 3639 | w->word->flags |= W_QUOTED; |
3185942a | 3640 | free (t); |
726f6388 | 3641 | } |
ccc6cda3 | 3642 | return list; |
726f6388 JA |
3643 | } |
3644 | ||
0628567a JA |
3645 | /* De-quote quoted characters in each word in LIST. */ |
3646 | WORD_LIST * | |
7117c2d2 JA |
3647 | dequote_list (list) |
3648 | WORD_LIST *list; | |
3649 | { | |
3650 | register char *s; | |
3651 | register WORD_LIST *tlist; | |
3652 | ||
3653 | for (tlist = list; tlist; tlist = tlist->next) | |
3654 | { | |
3655 | s = dequote_string (tlist->word->word); | |
3185942a JA |
3656 | if (QUOTED_NULL (tlist->word->word)) |
3657 | tlist->word->flags &= ~W_HASQUOTEDNULL; | |
7117c2d2 JA |
3658 | free (tlist->word->word); |
3659 | tlist->word->word = s; | |
3660 | } | |
3661 | return list; | |
3662 | } | |
3663 | ||
3664 | /* Remove CTLESC protecting a CTLESC or CTLNUL in place. Return the passed | |
3665 | string. */ | |
3185942a | 3666 | char * |
7117c2d2 JA |
3667 | remove_quoted_escapes (string) |
3668 | char *string; | |
3669 | { | |
3670 | char *t; | |
3671 | ||
3672 | if (string) | |
3673 | { | |
3674 | t = dequote_escapes (string); | |
3675 | strcpy (string, t); | |
3676 | free (t); | |
3677 | } | |
3678 | ||
3679 | return (string); | |
3680 | } | |
3681 | ||
cce855bc JA |
3682 | /* Perform quoted null character removal on STRING. We don't allow any |
3683 | quoted null characters in the middle or at the ends of strings because | |
3684 | of how expand_word_internal works. remove_quoted_nulls () turns | |
3685 | STRING into an empty string iff it only consists of a quoted null, | |
3686 | and removes all unquoted CTLNUL characters. */ | |
3185942a | 3687 | char * |
cce855bc JA |
3688 | remove_quoted_nulls (string) |
3689 | char *string; | |
3690 | { | |
7117c2d2 JA |
3691 | register size_t slen; |
3692 | register int i, j, prev_i; | |
3693 | DECLARE_MBSTATE; | |
3694 | ||
3695 | if (strchr (string, CTLNUL) == 0) /* XXX */ | |
3696 | return string; /* XXX */ | |
3697 | ||
3698 | slen = strlen (string); | |
3699 | i = j = 0; | |
3700 | ||
3701 | while (i < slen) | |
3702 | { | |
3703 | if (string[i] == CTLESC) | |
b80f6443 JA |
3704 | { |
3705 | /* Old code had j++, but we cannot assume that i == j at this | |
3706 | point -- what if a CTLNUL has already been removed from the | |
3707 | string? We don't want to drop the CTLESC or recopy characters | |
3708 | that we've already copied down. */ | |
3709 | i++; string[j++] = CTLESC; | |
3710 | if (i == slen) | |
3711 | break; | |
3712 | } | |
7117c2d2 | 3713 | else if (string[i] == CTLNUL) |
a48a8ac3 CR |
3714 | { |
3715 | i++; | |
3716 | continue; | |
3717 | } | |
7117c2d2 JA |
3718 | |
3719 | prev_i = i; | |
3720 | ADVANCE_CHAR (string, slen, i); | |
3721 | if (j < prev_i) | |
cce855bc | 3722 | { |
7117c2d2 | 3723 | do string[j++] = string[prev_i++]; while (prev_i < i); |
cce855bc | 3724 | } |
7117c2d2 JA |
3725 | else |
3726 | j = i; | |
cce855bc | 3727 | } |
7117c2d2 JA |
3728 | string[j] = '\0'; |
3729 | ||
3730 | return (string); | |
cce855bc JA |
3731 | } |
3732 | ||
3733 | /* Perform quoted null character removal on each element of LIST. | |
3734 | This modifies LIST. */ | |
3735 | void | |
3736 | word_list_remove_quoted_nulls (list) | |
3737 | WORD_LIST *list; | |
3738 | { | |
3739 | register WORD_LIST *t; | |
3740 | ||
3741 | for (t = list; t; t = t->next) | |
95732b49 JA |
3742 | { |
3743 | remove_quoted_nulls (t->word->word); | |
3744 | t->word->flags &= ~W_HASQUOTEDNULL; | |
3745 | } | |
cce855bc JA |
3746 | } |
3747 | ||
3748 | /* **************************************************************** */ | |
3749 | /* */ | |
3750 | /* Functions for Matching and Removing Patterns */ | |
3751 | /* */ | |
3752 | /* **************************************************************** */ | |
3753 | ||
b80f6443 JA |
3754 | #if defined (HANDLE_MULTIBYTE) |
3755 | #if 0 /* Currently unused */ | |
3756 | static unsigned char * | |
3757 | mb_getcharlens (string, len) | |
3758 | char *string; | |
3759 | int len; | |
3760 | { | |
3761 | int i, offset, last; | |
3762 | unsigned char *ret; | |
3763 | char *p; | |
3764 | DECLARE_MBSTATE; | |
3765 | ||
3766 | i = offset = 0; | |
3767 | last = 0; | |
3768 | ret = (unsigned char *)xmalloc (len); | |
3769 | memset (ret, 0, len); | |
3770 | while (string[last]) | |
3771 | { | |
3772 | ADVANCE_CHAR (string, len, offset); | |
3773 | ret[last] = offset - last; | |
3774 | last = offset; | |
3775 | } | |
3776 | return ret; | |
3777 | } | |
3778 | #endif | |
3779 | #endif | |
3780 | ||
cce855bc JA |
3781 | /* Remove the portion of PARAM matched by PATTERN according to OP, where OP |
3782 | can have one of 4 values: | |
3783 | RP_LONG_LEFT remove longest matching portion at start of PARAM | |
726f6388 JA |
3784 | RP_SHORT_LEFT remove shortest matching portion at start of PARAM |
3785 | RP_LONG_RIGHT remove longest matching portion at end of PARAM | |
3786 | RP_SHORT_RIGHT remove shortest matching portion at end of PARAM | |
3787 | */ | |
3788 | ||
3789 | #define RP_LONG_LEFT 1 | |
3790 | #define RP_SHORT_LEFT 2 | |
3791 | #define RP_LONG_RIGHT 3 | |
3792 | #define RP_SHORT_RIGHT 4 | |
3793 | ||
495aee44 | 3794 | /* Returns its first argument if nothing matched; new memory otherwise */ |
726f6388 | 3795 | static char * |
b80f6443 | 3796 | remove_upattern (param, pattern, op) |
726f6388 JA |
3797 | char *param, *pattern; |
3798 | int op; | |
3799 | { | |
ccc6cda3 JA |
3800 | register int len; |
3801 | register char *end; | |
726f6388 JA |
3802 | register char *p, *ret, c; |
3803 | ||
ccc6cda3 JA |
3804 | len = STRLEN (param); |
3805 | end = param + len; | |
726f6388 JA |
3806 | |
3807 | switch (op) | |
3808 | { | |
3809 | case RP_LONG_LEFT: /* remove longest match at start */ | |
3810 | for (p = end; p >= param; p--) | |
3811 | { | |
3812 | c = *p; *p = '\0'; | |
f73dda09 | 3813 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3814 | { |
3815 | *p = c; | |
3816 | return (savestring (p)); | |
3817 | } | |
3818 | *p = c; | |
b80f6443 | 3819 | |
726f6388 JA |
3820 | } |
3821 | break; | |
3822 | ||
3823 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
3824 | for (p = param; p <= end; p++) | |
3825 | { | |
3826 | c = *p; *p = '\0'; | |
f73dda09 | 3827 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3828 | { |
3829 | *p = c; | |
3830 | return (savestring (p)); | |
3831 | } | |
3832 | *p = c; | |
3833 | } | |
3834 | break; | |
3835 | ||
ccc6cda3 JA |
3836 | case RP_LONG_RIGHT: /* remove longest match at end */ |
3837 | for (p = param; p <= end; p++) | |
3838 | { | |
f73dda09 | 3839 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3840 | { |
3841 | c = *p; *p = '\0'; | |
3842 | ret = savestring (param); | |
3843 | *p = c; | |
3844 | return (ret); | |
3845 | } | |
3846 | } | |
3847 | break; | |
3848 | ||
3849 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
3850 | for (p = end; p >= param; p--) | |
3851 | { | |
f73dda09 | 3852 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3853 | { |
3854 | c = *p; *p = '\0'; | |
3855 | ret = savestring (param); | |
3856 | *p = c; | |
3857 | return (ret); | |
3858 | } | |
3859 | } | |
3860 | break; | |
3861 | } | |
b80f6443 | 3862 | |
495aee44 | 3863 | return (param); /* no match, return original string */ |
ccc6cda3 JA |
3864 | } |
3865 | ||
b80f6443 | 3866 | #if defined (HANDLE_MULTIBYTE) |
495aee44 | 3867 | /* Returns its first argument if nothing matched; new memory otherwise */ |
b80f6443 JA |
3868 | static wchar_t * |
3869 | remove_wpattern (wparam, wstrlen, wpattern, op) | |
3870 | wchar_t *wparam; | |
3871 | size_t wstrlen; | |
3872 | wchar_t *wpattern; | |
3873 | int op; | |
3874 | { | |
0628567a JA |
3875 | wchar_t wc, *ret; |
3876 | int n; | |
b80f6443 JA |
3877 | |
3878 | switch (op) | |
3879 | { | |
3880 | case RP_LONG_LEFT: /* remove longest match at start */ | |
3881 | for (n = wstrlen; n >= 0; n--) | |
3882 | { | |
3883 | wc = wparam[n]; wparam[n] = L'\0'; | |
3884 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3885 | { | |
3886 | wparam[n] = wc; | |
3887 | return (wcsdup (wparam + n)); | |
3888 | } | |
3889 | wparam[n] = wc; | |
3890 | } | |
3891 | break; | |
3892 | ||
3893 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
3894 | for (n = 0; n <= wstrlen; n++) | |
3895 | { | |
3896 | wc = wparam[n]; wparam[n] = L'\0'; | |
3897 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3898 | { | |
3899 | wparam[n] = wc; | |
3900 | return (wcsdup (wparam + n)); | |
3901 | } | |
3902 | wparam[n] = wc; | |
3903 | } | |
3904 | break; | |
3905 | ||
3906 | case RP_LONG_RIGHT: /* remove longest match at end */ | |
3907 | for (n = 0; n <= wstrlen; n++) | |
3908 | { | |
3909 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3910 | { | |
3911 | wc = wparam[n]; wparam[n] = L'\0'; | |
3912 | ret = wcsdup (wparam); | |
3913 | wparam[n] = wc; | |
3914 | return (ret); | |
3915 | } | |
3916 | } | |
3917 | break; | |
3918 | ||
3919 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
3920 | for (n = wstrlen; n >= 0; n--) | |
3921 | { | |
3922 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
3923 | { | |
3924 | wc = wparam[n]; wparam[n] = L'\0'; | |
3925 | ret = wcsdup (wparam); | |
3926 | wparam[n] = wc; | |
3927 | return (ret); | |
3928 | } | |
3929 | } | |
3930 | break; | |
3931 | } | |
3932 | ||
495aee44 | 3933 | return (wparam); /* no match, return original string */ |
b80f6443 JA |
3934 | } |
3935 | #endif /* HANDLE_MULTIBYTE */ | |
3936 | ||
3937 | static char * | |
3938 | remove_pattern (param, pattern, op) | |
3939 | char *param, *pattern; | |
3940 | int op; | |
3941 | { | |
495aee44 CR |
3942 | char *xret; |
3943 | ||
b80f6443 JA |
3944 | if (param == NULL) |
3945 | return (param); | |
3946 | if (*param == '\0' || pattern == NULL || *pattern == '\0') /* minor optimization */ | |
3947 | return (savestring (param)); | |
3948 | ||
3949 | #if defined (HANDLE_MULTIBYTE) | |
3950 | if (MB_CUR_MAX > 1) | |
3951 | { | |
3952 | wchar_t *ret, *oret; | |
3953 | size_t n; | |
3954 | wchar_t *wparam, *wpattern; | |
3955 | mbstate_t ps; | |
b80f6443 JA |
3956 | |
3957 | n = xdupmbstowcs (&wpattern, NULL, pattern); | |
3958 | if (n == (size_t)-1) | |
495aee44 CR |
3959 | { |
3960 | xret = remove_upattern (param, pattern, op); | |
3961 | return ((xret == param) ? savestring (param) : xret); | |
3962 | } | |
b80f6443 JA |
3963 | n = xdupmbstowcs (&wparam, NULL, param); |
3964 | if (n == (size_t)-1) | |
3965 | { | |
3966 | free (wpattern); | |
495aee44 CR |
3967 | xret = remove_upattern (param, pattern, op); |
3968 | return ((xret == param) ? savestring (param) : xret); | |
b80f6443 JA |
3969 | } |
3970 | oret = ret = remove_wpattern (wparam, n, wpattern, op); | |
495aee44 CR |
3971 | /* Don't bother to convert wparam back to multibyte string if nothing |
3972 | matched; just return copy of original string */ | |
3973 | if (ret == wparam) | |
3974 | { | |
3975 | free (wparam); | |
3976 | free (wpattern); | |
3977 | return (savestring (param)); | |
3978 | } | |
b80f6443 JA |
3979 | |
3980 | free (wparam); | |
3981 | free (wpattern); | |
3982 | ||
3983 | n = strlen (param); | |
0628567a | 3984 | xret = (char *)xmalloc (n + 1); |
b80f6443 JA |
3985 | memset (&ps, '\0', sizeof (mbstate_t)); |
3986 | n = wcsrtombs (xret, (const wchar_t **)&ret, n, &ps); | |
3987 | xret[n] = '\0'; /* just to make sure */ | |
3988 | free (oret); | |
3989 | return xret; | |
3990 | } | |
3991 | else | |
3992 | #endif | |
ccc6cda3 | 3993 | { |
495aee44 CR |
3994 | xret = remove_upattern (param, pattern, op); |
3995 | return ((xret == param) ? savestring (param) : xret); | |
ccc6cda3 JA |
3996 | } |
3997 | } | |
3998 | ||
3999 | /* Match PAT anywhere in STRING and return the match boundaries. | |
4000 | This returns 1 in case of a successful match, 0 otherwise. SP | |
4001 | and EP are pointers into the string where the match begins and | |
4002 | ends, respectively. MTYPE controls what kind of match is attempted. | |
4003 | MATCH_BEG and MATCH_END anchor the match at the beginning and end | |
4004 | of the string, respectively. The longest match is returned. */ | |
4005 | static int | |
b80f6443 | 4006 | match_upattern (string, pat, mtype, sp, ep) |
ccc6cda3 JA |
4007 | char *string, *pat; |
4008 | int mtype; | |
4009 | char **sp, **ep; | |
4010 | { | |
495aee44 | 4011 | int c, len, mlen; |
95732b49 | 4012 | register char *p, *p1, *npat; |
ccc6cda3 | 4013 | char *end; |
495aee44 | 4014 | int n1; |
ccc6cda3 | 4015 | |
95732b49 JA |
4016 | /* If the pattern doesn't match anywhere in the string, go ahead and |
4017 | short-circuit right away. A minor optimization, saves a bunch of | |
4018 | unnecessary calls to strmatch (up to N calls for a string of N | |
4019 | characters) if the match is unsuccessful. To preserve the semantics | |
4020 | of the substring matches below, we make sure that the pattern has | |
4021 | `*' as first and last character, making a new pattern if necessary. */ | |
4022 | /* XXX - check this later if I ever implement `**' with special meaning, | |
4023 | since this will potentially result in `**' at the beginning or end */ | |
4024 | len = STRLEN (pat); | |
0001803f | 4025 | if (pat[0] != '*' || (pat[0] == '*' && pat[1] == LPAREN && extended_glob) || pat[len - 1] != '*') |
95732b49 | 4026 | { |
0628567a | 4027 | p = npat = (char *)xmalloc (len + 3); |
95732b49 | 4028 | p1 = pat; |
0001803f | 4029 | if (*p1 != '*' || (*p1 == '*' && p1[1] == LPAREN && extended_glob)) |
95732b49 JA |
4030 | *p++ = '*'; |
4031 | while (*p1) | |
4032 | *p++ = *p1++; | |
4033 | if (p1[-1] != '*' || p[-2] == '\\') | |
4034 | *p++ = '*'; | |
4035 | *p = '\0'; | |
4036 | } | |
4037 | else | |
4038 | npat = pat; | |
4039 | c = strmatch (npat, string, FNMATCH_EXTFLAG); | |
4040 | if (npat != pat) | |
4041 | free (npat); | |
4042 | if (c == FNM_NOMATCH) | |
4043 | return (0); | |
4044 | ||
b80f6443 JA |
4045 | len = STRLEN (string); |
4046 | end = string + len; | |
ccc6cda3 | 4047 | |
495aee44 CR |
4048 | mlen = umatchlen (pat, len); |
4049 | ||
ccc6cda3 JA |
4050 | switch (mtype) |
4051 | { | |
4052 | case MATCH_ANY: | |
4053 | for (p = string; p <= end; p++) | |
4054 | { | |
4055 | if (match_pattern_char (pat, p)) | |
4056 | { | |
495aee44 | 4057 | #if 0 |
ccc6cda3 | 4058 | for (p1 = end; p1 >= p; p1--) |
495aee44 CR |
4059 | #else |
4060 | p1 = (mlen == -1) ? end : p + mlen; | |
4061 | /* p1 - p = length of portion of string to be considered | |
4062 | p = current position in string | |
4063 | mlen = number of characters consumed by match (-1 for entire string) | |
4064 | end = end of string | |
4065 | we want to break immediately if the potential match len | |
4066 | is greater than the number of characters remaining in the | |
4067 | string | |
4068 | */ | |
4069 | if (p1 > end) | |
4070 | break; | |
4071 | for ( ; p1 >= p; p1--) | |
4072 | #endif | |
ccc6cda3 JA |
4073 | { |
4074 | c = *p1; *p1 = '\0'; | |
f73dda09 | 4075 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
4076 | { |
4077 | *p1 = c; | |
4078 | *sp = p; | |
4079 | *ep = p1; | |
4080 | return 1; | |
4081 | } | |
4082 | *p1 = c; | |
495aee44 CR |
4083 | #if 1 |
4084 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4085 | if (mlen != -1) | |
4086 | break; | |
4087 | #endif | |
ccc6cda3 JA |
4088 | } |
4089 | } | |
4090 | } | |
b80f6443 | 4091 | |
ccc6cda3 JA |
4092 | return (0); |
4093 | ||
4094 | case MATCH_BEG: | |
4095 | if (match_pattern_char (pat, string) == 0) | |
28ef6c31 | 4096 | return (0); |
b80f6443 | 4097 | |
495aee44 | 4098 | #if 0 |
ccc6cda3 | 4099 | for (p = end; p >= string; p--) |
495aee44 CR |
4100 | #else |
4101 | for (p = (mlen == -1) ? end : string + mlen; p >= string; p--) | |
4102 | #endif | |
ccc6cda3 JA |
4103 | { |
4104 | c = *p; *p = '\0'; | |
f73dda09 | 4105 | if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
4106 | { |
4107 | *p = c; | |
4108 | *sp = string; | |
4109 | *ep = p; | |
4110 | return 1; | |
4111 | } | |
4112 | *p = c; | |
495aee44 CR |
4113 | #if 1 |
4114 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4115 | if (mlen != -1) | |
4116 | break; | |
4117 | #endif | |
ccc6cda3 | 4118 | } |
b80f6443 | 4119 | |
ccc6cda3 | 4120 | return (0); |
726f6388 | 4121 | |
ccc6cda3 | 4122 | case MATCH_END: |
495aee44 | 4123 | #if 0 |
ccc6cda3 | 4124 | for (p = string; p <= end; p++) |
495aee44 CR |
4125 | #else |
4126 | for (p = end - ((mlen == -1) ? len : mlen); p <= end; p++) | |
4127 | #endif | |
b80f6443 JA |
4128 | { |
4129 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) | |
4130 | { | |
4131 | *sp = p; | |
4132 | *ep = end; | |
4133 | return 1; | |
4134 | } | |
495aee44 CR |
4135 | #if 1 |
4136 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4137 | if (mlen != -1) | |
4138 | break; | |
4139 | #endif | |
b80f6443 JA |
4140 | } |
4141 | ||
4142 | return (0); | |
4143 | } | |
4144 | ||
4145 | return (0); | |
4146 | } | |
4147 | ||
4148 | #if defined (HANDLE_MULTIBYTE) | |
b80f6443 JA |
4149 | /* Match WPAT anywhere in WSTRING and return the match boundaries. |
4150 | This returns 1 in case of a successful match, 0 otherwise. Wide | |
4151 | character version. */ | |
4152 | static int | |
4153 | match_wpattern (wstring, indices, wstrlen, wpat, mtype, sp, ep) | |
4154 | wchar_t *wstring; | |
4155 | char **indices; | |
4156 | size_t wstrlen; | |
4157 | wchar_t *wpat; | |
4158 | int mtype; | |
4159 | char **sp, **ep; | |
4160 | { | |
95732b49 | 4161 | wchar_t wc, *wp, *nwpat, *wp1; |
495aee44 CR |
4162 | size_t len; |
4163 | int mlen; | |
4164 | int n, n1, n2, simple; | |
4165 | ||
4166 | simple = (wpat[0] != L'\\' && wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'['); | |
4167 | #if defined (EXTENDED_GLOB) | |
4168 | if (extended_glob) | |
55226ad2 | 4169 | simple &= (wpat[1] != L'(' || (wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'+' && wpat[0] != L'!' && wpat[0] != L'@')); /*)*/ |
b80f6443 JA |
4170 | #endif |
4171 | ||
95732b49 JA |
4172 | /* If the pattern doesn't match anywhere in the string, go ahead and |
4173 | short-circuit right away. A minor optimization, saves a bunch of | |
4174 | unnecessary calls to strmatch (up to N calls for a string of N | |
4175 | characters) if the match is unsuccessful. To preserve the semantics | |
4176 | of the substring matches below, we make sure that the pattern has | |
4177 | `*' as first and last character, making a new pattern if necessary. */ | |
95732b49 | 4178 | len = wcslen (wpat); |
0001803f | 4179 | if (wpat[0] != L'*' || (wpat[0] == L'*' && wpat[1] == WLPAREN && extended_glob) || wpat[len - 1] != L'*') |
95732b49 | 4180 | { |
0628567a | 4181 | wp = nwpat = (wchar_t *)xmalloc ((len + 3) * sizeof (wchar_t)); |
95732b49 | 4182 | wp1 = wpat; |
0001803f | 4183 | if (*wp1 != L'*' || (*wp1 == '*' && wp1[1] == WLPAREN && extended_glob)) |
95732b49 JA |
4184 | *wp++ = L'*'; |
4185 | while (*wp1 != L'\0') | |
4186 | *wp++ = *wp1++; | |
4187 | if (wp1[-1] != L'*' || wp1[-2] == L'\\') | |
4188 | *wp++ = L'*'; | |
4189 | *wp = '\0'; | |
4190 | } | |
4191 | else | |
4192 | nwpat = wpat; | |
4193 | len = wcsmatch (nwpat, wstring, FNMATCH_EXTFLAG); | |
4194 | if (nwpat != wpat) | |
4195 | free (nwpat); | |
4196 | if (len == FNM_NOMATCH) | |
4197 | return (0); | |
4198 | ||
495aee44 CR |
4199 | mlen = wmatchlen (wpat, wstrlen); |
4200 | ||
4201 | /* itrace("wmatchlen (%ls) -> %d", wpat, mlen); */ | |
b80f6443 JA |
4202 | switch (mtype) |
4203 | { | |
4204 | case MATCH_ANY: | |
4205 | for (n = 0; n <= wstrlen; n++) | |
4206 | { | |
495aee44 CR |
4207 | #if 1 |
4208 | n2 = simple ? (*wpat == wstring[n]) : match_pattern_wchar (wpat, wstring + n); | |
4209 | #else | |
4210 | n2 = match_pattern_wchar (wpat, wstring + n); | |
4211 | #endif | |
4212 | if (n2) | |
b80f6443 | 4213 | { |
495aee44 | 4214 | #if 0 |
b80f6443 | 4215 | for (n1 = wstrlen; n1 >= n; n1--) |
495aee44 CR |
4216 | #else |
4217 | n1 = (mlen == -1) ? wstrlen : n + mlen; | |
4218 | if (n1 > wstrlen) | |
4219 | break; | |
4220 | ||
4221 | for ( ; n1 >= n; n1--) | |
4222 | #endif | |
b80f6443 JA |
4223 | { |
4224 | wc = wstring[n1]; wstring[n1] = L'\0'; | |
4225 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
4226 | { | |
4227 | wstring[n1] = wc; | |
4228 | *sp = indices[n]; | |
4229 | *ep = indices[n1]; | |
4230 | return 1; | |
4231 | } | |
4232 | wstring[n1] = wc; | |
495aee44 CR |
4233 | #if 1 |
4234 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4235 | if (mlen != -1) | |
4236 | break; | |
4237 | #endif | |
b80f6443 JA |
4238 | } |
4239 | } | |
4240 | } | |
4241 | ||
4242 | return (0); | |
4243 | ||
4244 | case MATCH_BEG: | |
4245 | if (match_pattern_wchar (wpat, wstring) == 0) | |
4246 | return (0); | |
4247 | ||
495aee44 | 4248 | #if 0 |
b80f6443 | 4249 | for (n = wstrlen; n >= 0; n--) |
495aee44 CR |
4250 | #else |
4251 | for (n = (mlen == -1) ? wstrlen : mlen; n >= 0; n--) | |
4252 | #endif | |
b80f6443 JA |
4253 | { |
4254 | wc = wstring[n]; wstring[n] = L'\0'; | |
4255 | if (wcsmatch (wpat, wstring, FNMATCH_EXTFLAG) == 0) | |
4256 | { | |
4257 | wstring[n] = wc; | |
4258 | *sp = indices[0]; | |
4259 | *ep = indices[n]; | |
4260 | return 1; | |
4261 | } | |
4262 | wstring[n] = wc; | |
495aee44 CR |
4263 | #if 1 |
4264 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4265 | if (mlen != -1) | |
4266 | break; | |
4267 | #endif | |
b80f6443 JA |
4268 | } |
4269 | ||
4270 | return (0); | |
4271 | ||
4272 | case MATCH_END: | |
495aee44 | 4273 | #if 0 |
b80f6443 | 4274 | for (n = 0; n <= wstrlen; n++) |
495aee44 CR |
4275 | #else |
4276 | for (n = wstrlen - ((mlen == -1) ? wstrlen : mlen); n <= wstrlen; n++) | |
4277 | #endif | |
b80f6443 JA |
4278 | { |
4279 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
4280 | { | |
4281 | *sp = indices[n]; | |
4282 | *ep = indices[wstrlen]; | |
4283 | return 1; | |
4284 | } | |
495aee44 CR |
4285 | #if 1 |
4286 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4287 | if (mlen != -1) | |
4288 | break; | |
4289 | #endif | |
b80f6443 JA |
4290 | } |
4291 | ||
ccc6cda3 | 4292 | return (0); |
726f6388 | 4293 | } |
ccc6cda3 JA |
4294 | |
4295 | return (0); | |
726f6388 | 4296 | } |
b80f6443 JA |
4297 | #endif /* HANDLE_MULTIBYTE */ |
4298 | ||
4299 | static int | |
4300 | match_pattern (string, pat, mtype, sp, ep) | |
4301 | char *string, *pat; | |
4302 | int mtype; | |
4303 | char **sp, **ep; | |
4304 | { | |
4305 | #if defined (HANDLE_MULTIBYTE) | |
4306 | int ret; | |
4307 | size_t n; | |
4308 | wchar_t *wstring, *wpat; | |
4309 | char **indices; | |
495aee44 | 4310 | size_t slen, plen, mslen, mplen; |
b80f6443 JA |
4311 | #endif |
4312 | ||
4313 | if (string == 0 || *string == 0 || pat == 0 || *pat == 0) | |
4314 | return (0); | |
4315 | ||
4316 | #if defined (HANDLE_MULTIBYTE) | |
4317 | if (MB_CUR_MAX > 1) | |
4318 | { | |
495aee44 CR |
4319 | #if 0 |
4320 | slen = STRLEN (string); | |
4321 | mslen = MBSLEN (string); | |
4322 | plen = STRLEN (pat); | |
4323 | mplen = MBSLEN (pat); | |
4324 | if (slen == mslen && plen == mplen) | |
4325 | #else | |
4326 | if (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0) | |
4327 | #endif | |
4328 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4329 | ||
b80f6443 JA |
4330 | n = xdupmbstowcs (&wpat, NULL, pat); |
4331 | if (n == (size_t)-1) | |
4332 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4333 | n = xdupmbstowcs (&wstring, &indices, string); | |
4334 | if (n == (size_t)-1) | |
4335 | { | |
4336 | free (wpat); | |
4337 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4338 | } | |
4339 | ret = match_wpattern (wstring, indices, n, wpat, mtype, sp, ep); | |
4340 | ||
4341 | free (wpat); | |
4342 | free (wstring); | |
4343 | free (indices); | |
4344 | ||
4345 | return (ret); | |
4346 | } | |
4347 | else | |
4348 | #endif | |
4349 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4350 | } | |
726f6388 | 4351 | |
cce855bc JA |
4352 | static int |
4353 | getpatspec (c, value) | |
4354 | int c; | |
4355 | char *value; | |
4356 | { | |
4357 | if (c == '#') | |
4358 | return ((*value == '#') ? RP_LONG_LEFT : RP_SHORT_LEFT); | |
4359 | else /* c == '%' */ | |
4360 | return ((*value == '%') ? RP_LONG_RIGHT : RP_SHORT_RIGHT); | |
4361 | } | |
4362 | ||
4363 | /* Posix.2 says that the WORD should be run through tilde expansion, | |
4364 | parameter expansion, command substitution and arithmetic expansion. | |
4365 | This leaves the result quoted, so quote_string_for_globbing () has | |
f73dda09 | 4366 | to be called to fix it up for strmatch (). If QUOTED is non-zero, |
cce855bc JA |
4367 | it means that the entire expression was enclosed in double quotes. |
4368 | This means that quoting characters in the pattern do not make any | |
4369 | special pattern characters quoted. For example, the `*' in the | |
4370 | following retains its special meaning: "${foo#'*'}". */ | |
4371 | static char * | |
4372 | getpattern (value, quoted, expandpat) | |
4373 | char *value; | |
4374 | int quoted, expandpat; | |
4375 | { | |
4376 | char *pat, *tword; | |
4377 | WORD_LIST *l; | |
0628567a | 4378 | #if 0 |
cce855bc | 4379 | int i; |
0628567a | 4380 | #endif |
7117c2d2 JA |
4381 | /* There is a problem here: how to handle single or double quotes in the |
4382 | pattern string when the whole expression is between double quotes? | |
4383 | POSIX.2 says that enclosing double quotes do not cause the pattern to | |
4384 | be quoted, but does that leave us a problem with @ and array[@] and their | |
4385 | expansions inside a pattern? */ | |
4386 | #if 0 | |
cce855bc JA |
4387 | if (expandpat && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *tword) |
4388 | { | |
4389 | i = 0; | |
4390 | pat = string_extract_double_quoted (tword, &i, 1); | |
4391 | free (tword); | |
4392 | tword = pat; | |
4393 | } | |
7117c2d2 | 4394 | #endif |
cce855bc | 4395 | |
7117c2d2 JA |
4396 | /* expand_string_for_rhs () leaves WORD quoted and does not perform |
4397 | word splitting. */ | |
95732b49 | 4398 | l = *value ? expand_string_for_rhs (value, |
7117c2d2 | 4399 | (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? Q_PATQUOTE : quoted, |
cce855bc | 4400 | (int *)NULL, (int *)NULL) |
cce855bc | 4401 | : (WORD_LIST *)0; |
cce855bc JA |
4402 | pat = string_list (l); |
4403 | dispose_words (l); | |
4404 | if (pat) | |
4405 | { | |
4406 | tword = quote_string_for_globbing (pat, QGLOB_CVTNULL); | |
4407 | free (pat); | |
4408 | pat = tword; | |
4409 | } | |
4410 | return (pat); | |
4411 | } | |
4412 | ||
7117c2d2 | 4413 | #if 0 |
cce855bc JA |
4414 | /* Handle removing a pattern from a string as a result of ${name%[%]value} |
4415 | or ${name#[#]value}. */ | |
4416 | static char * | |
7117c2d2 JA |
4417 | variable_remove_pattern (value, pattern, patspec, quoted) |
4418 | char *value, *pattern; | |
4419 | int patspec, quoted; | |
cce855bc | 4420 | { |
7117c2d2 | 4421 | char *tword; |
cce855bc | 4422 | |
7117c2d2 | 4423 | tword = remove_pattern (value, pattern, patspec); |
cce855bc | 4424 | |
cce855bc JA |
4425 | return (tword); |
4426 | } | |
7117c2d2 | 4427 | #endif |
cce855bc JA |
4428 | |
4429 | static char * | |
7117c2d2 | 4430 | list_remove_pattern (list, pattern, patspec, itype, quoted) |
cce855bc JA |
4431 | WORD_LIST *list; |
4432 | char *pattern; | |
7117c2d2 | 4433 | int patspec, itype, quoted; |
cce855bc JA |
4434 | { |
4435 | WORD_LIST *new, *l; | |
4436 | WORD_DESC *w; | |
4437 | char *tword; | |
4438 | ||
4439 | for (new = (WORD_LIST *)NULL, l = list; l; l = l->next) | |
4440 | { | |
4441 | tword = remove_pattern (l->word->word, pattern, patspec); | |
95732b49 JA |
4442 | w = alloc_word_desc (); |
4443 | w->word = tword ? tword : savestring (""); | |
cce855bc JA |
4444 | new = make_word_list (w, new); |
4445 | } | |
4446 | ||
4447 | l = REVERSE_LIST (new, WORD_LIST *); | |
3185942a | 4448 | tword = string_list_pos_params (itype, l, quoted); |
cce855bc | 4449 | dispose_words (l); |
3185942a | 4450 | |
cce855bc JA |
4451 | return (tword); |
4452 | } | |
4453 | ||
4454 | static char * | |
7117c2d2 JA |
4455 | parameter_list_remove_pattern (itype, pattern, patspec, quoted) |
4456 | int itype; | |
4457 | char *pattern; | |
4458 | int patspec, quoted; | |
cce855bc | 4459 | { |
7117c2d2 | 4460 | char *ret; |
cce855bc JA |
4461 | WORD_LIST *list; |
4462 | ||
cce855bc | 4463 | list = list_rest_of_args (); |
7117c2d2 JA |
4464 | if (list == 0) |
4465 | return ((char *)NULL); | |
4466 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
cce855bc | 4467 | dispose_words (list); |
cce855bc JA |
4468 | return (ret); |
4469 | } | |
4470 | ||
4471 | #if defined (ARRAY_VARS) | |
4472 | static char * | |
3185942a JA |
4473 | array_remove_pattern (var, pattern, patspec, varname, quoted) |
4474 | SHELL_VAR *var; | |
7117c2d2 JA |
4475 | char *pattern; |
4476 | int patspec; | |
4477 | char *varname; /* so we can figure out how it's indexed */ | |
4478 | int quoted; | |
cce855bc | 4479 | { |
3185942a JA |
4480 | ARRAY *a; |
4481 | HASH_TABLE *h; | |
7117c2d2 JA |
4482 | int itype; |
4483 | char *ret; | |
4484 | WORD_LIST *list; | |
4485 | SHELL_VAR *v; | |
cce855bc | 4486 | |
7117c2d2 JA |
4487 | /* compute itype from varname here */ |
4488 | v = array_variable_part (varname, &ret, 0); | |
4489 | itype = ret[0]; | |
4490 | ||
3185942a JA |
4491 | a = (v && array_p (v)) ? array_cell (v) : 0; |
4492 | h = (v && assoc_p (v)) ? assoc_cell (v) : 0; | |
4493 | ||
4494 | list = a ? array_to_word_list (a) : (h ? assoc_to_word_list (h) : 0); | |
7117c2d2 JA |
4495 | if (list == 0) |
4496 | return ((char *)NULL); | |
4497 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
4498 | dispose_words (list); | |
4499 | ||
4500 | return ret; | |
4501 | } | |
4502 | #endif /* ARRAY_VARS */ | |
4503 | ||
4504 | static char * | |
495aee44 CR |
4505 | parameter_brace_remove_pattern (varname, value, ind, patstr, rtype, quoted, flags) |
4506 | char *varname, *value; | |
4507 | int ind; | |
4508 | char *patstr; | |
4509 | int rtype, quoted, flags; | |
7117c2d2 | 4510 | { |
b80f6443 | 4511 | int vtype, patspec, starsub; |
7117c2d2 JA |
4512 | char *temp1, *val, *pattern; |
4513 | SHELL_VAR *v; | |
4514 | ||
4515 | if (value == 0) | |
4516 | return ((char *)NULL); | |
4517 | ||
4518 | this_command_name = varname; | |
4519 | ||
495aee44 | 4520 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
7117c2d2 | 4521 | if (vtype == -1) |
cce855bc JA |
4522 | return ((char *)NULL); |
4523 | ||
b80f6443 JA |
4524 | starsub = vtype & VT_STARSUB; |
4525 | vtype &= ~VT_STARSUB; | |
4526 | ||
7117c2d2 | 4527 | patspec = getpatspec (rtype, patstr); |
cce855bc | 4528 | if (patspec == RP_LONG_LEFT || patspec == RP_LONG_RIGHT) |
7117c2d2 | 4529 | patstr++; |
cce855bc | 4530 | |
f1be666c JA |
4531 | /* Need to pass getpattern newly-allocated memory in case of expansion -- |
4532 | the expansion code will free the passed string on an error. */ | |
4533 | temp1 = savestring (patstr); | |
4534 | pattern = getpattern (temp1, quoted, 1); | |
4535 | free (temp1); | |
cce855bc | 4536 | |
7117c2d2 JA |
4537 | temp1 = (char *)NULL; /* shut up gcc */ |
4538 | switch (vtype) | |
cce855bc | 4539 | { |
7117c2d2 JA |
4540 | case VT_VARIABLE: |
4541 | case VT_ARRAYMEMBER: | |
4542 | temp1 = remove_pattern (val, pattern, patspec); | |
4543 | if (vtype == VT_VARIABLE) | |
4544 | FREE (val); | |
4545 | if (temp1) | |
28ef6c31 | 4546 | { |
3185942a JA |
4547 | val = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
4548 | ? quote_string (temp1) | |
4549 | : quote_escapes (temp1); | |
7117c2d2 JA |
4550 | free (temp1); |
4551 | temp1 = val; | |
28ef6c31 | 4552 | } |
7117c2d2 JA |
4553 | break; |
4554 | #if defined (ARRAY_VARS) | |
4555 | case VT_ARRAYVAR: | |
3185942a | 4556 | temp1 = array_remove_pattern (v, pattern, patspec, varname, quoted); |
7117c2d2 | 4557 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) |
cce855bc | 4558 | { |
7117c2d2 JA |
4559 | val = quote_escapes (temp1); |
4560 | free (temp1); | |
4561 | temp1 = val; | |
cce855bc | 4562 | } |
7117c2d2 JA |
4563 | break; |
4564 | #endif | |
4565 | case VT_POSPARMS: | |
4566 | temp1 = parameter_list_remove_pattern (varname[0], pattern, patspec, quoted); | |
4567 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
4568 | { | |
4569 | val = quote_escapes (temp1); | |
4570 | free (temp1); | |
4571 | temp1 = val; | |
4572 | } | |
4573 | break; | |
cce855bc JA |
4574 | } |
4575 | ||
4576 | FREE (pattern); | |
7117c2d2 JA |
4577 | return temp1; |
4578 | } | |
cce855bc | 4579 | |
726f6388 JA |
4580 | /******************************************* |
4581 | * * | |
4582 | * Functions to expand WORD_DESCs * | |
4583 | * * | |
4584 | *******************************************/ | |
4585 | ||
4586 | /* Expand WORD, performing word splitting on the result. This does | |
4587 | parameter expansion, command substitution, arithmetic expansion, | |
4588 | word splitting, and quote removal. */ | |
4589 | ||
4590 | WORD_LIST * | |
4591 | expand_word (word, quoted) | |
4592 | WORD_DESC *word; | |
4593 | int quoted; | |
4594 | { | |
4595 | WORD_LIST *result, *tresult; | |
4596 | ||
b72432fd | 4597 | tresult = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
726f6388 JA |
4598 | result = word_list_split (tresult); |
4599 | dispose_words (tresult); | |
ccc6cda3 | 4600 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4601 | } |
4602 | ||
4603 | /* Expand WORD, but do not perform word splitting on the result. This | |
4604 | does parameter expansion, command substitution, arithmetic expansion, | |
4605 | and quote removal. */ | |
4606 | WORD_LIST * | |
28ef6c31 | 4607 | expand_word_unsplit (word, quoted) |
726f6388 JA |
4608 | WORD_DESC *word; |
4609 | int quoted; | |
4610 | { | |
4611 | WORD_LIST *result; | |
4612 | ||
28ef6c31 | 4613 | expand_no_split_dollar_star = 1; |
0001803f CR |
4614 | #if defined (HANDLE_MULTIBYTE) |
4615 | if (ifs_firstc[0] == 0) | |
4616 | #else | |
4617 | if (ifs_firstc == 0) | |
4618 | #endif | |
4619 | word->flags |= W_NOSPLIT; | |
1cc06898 | 4620 | word->flags |= W_NOSPLIT2; |
b72432fd | 4621 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 | 4622 | expand_no_split_dollar_star = 0; |
7117c2d2 | 4623 | |
ccc6cda3 | 4624 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4625 | } |
4626 | ||
4627 | /* Perform shell expansions on WORD, but do not perform word splitting or | |
0001803f CR |
4628 | quote removal on the result. Virtually identical to expand_word_unsplit; |
4629 | could be combined if implementations don't diverge. */ | |
726f6388 JA |
4630 | WORD_LIST * |
4631 | expand_word_leave_quoted (word, quoted) | |
4632 | WORD_DESC *word; | |
4633 | int quoted; | |
4634 | { | |
0001803f CR |
4635 | WORD_LIST *result; |
4636 | ||
4637 | expand_no_split_dollar_star = 1; | |
4638 | #if defined (HANDLE_MULTIBYTE) | |
4639 | if (ifs_firstc[0] == 0) | |
4640 | #else | |
4641 | if (ifs_firstc == 0) | |
4642 | #endif | |
4643 | word->flags |= W_NOSPLIT; | |
4644 | word->flags |= W_NOSPLIT2; | |
4645 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); | |
4646 | expand_no_split_dollar_star = 0; | |
4647 | ||
4648 | return result; | |
726f6388 JA |
4649 | } |
4650 | ||
726f6388 JA |
4651 | #if defined (PROCESS_SUBSTITUTION) |
4652 | ||
cce855bc JA |
4653 | /*****************************************************************/ |
4654 | /* */ | |
4655 | /* Hacking Process Substitution */ | |
4656 | /* */ | |
4657 | /*****************************************************************/ | |
726f6388 | 4658 | |
726f6388 JA |
4659 | #if !defined (HAVE_DEV_FD) |
4660 | /* Named pipes must be removed explicitly with `unlink'. This keeps a list | |
4661 | of FIFOs the shell has open. unlink_fifo_list will walk the list and | |
4662 | unlink all of them. add_fifo_list adds the name of an open FIFO to the | |
4663 | list. NFIFO is a count of the number of FIFOs in the list. */ | |
4664 | #define FIFO_INCR 20 | |
4665 | ||
f73dda09 JA |
4666 | struct temp_fifo { |
4667 | char *file; | |
4668 | pid_t proc; | |
4669 | }; | |
4670 | ||
4671 | static struct temp_fifo *fifo_list = (struct temp_fifo *)NULL; | |
ccc6cda3 JA |
4672 | static int nfifo; |
4673 | static int fifo_list_size; | |
726f6388 | 4674 | |
495aee44 CR |
4675 | char * |
4676 | copy_fifo_list (sizep) | |
4677 | int *sizep; | |
4678 | { | |
4679 | if (sizep) | |
4680 | *sizep = 0; | |
4681 | return (char *)NULL; | |
4682 | } | |
4683 | ||
726f6388 JA |
4684 | static void |
4685 | add_fifo_list (pathname) | |
4686 | char *pathname; | |
4687 | { | |
4688 | if (nfifo >= fifo_list_size - 1) | |
4689 | { | |
4690 | fifo_list_size += FIFO_INCR; | |
f73dda09 JA |
4691 | fifo_list = (struct temp_fifo *)xrealloc (fifo_list, |
4692 | fifo_list_size * sizeof (struct temp_fifo)); | |
726f6388 JA |
4693 | } |
4694 | ||
f73dda09 JA |
4695 | fifo_list[nfifo].file = savestring (pathname); |
4696 | nfifo++; | |
726f6388 JA |
4697 | } |
4698 | ||
495aee44 CR |
4699 | void |
4700 | unlink_fifo (i) | |
4701 | int i; | |
4702 | { | |
4703 | if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1)) | |
4704 | { | |
4705 | unlink (fifo_list[i].file); | |
4706 | free (fifo_list[i].file); | |
4707 | fifo_list[i].file = (char *)NULL; | |
4708 | fifo_list[i].proc = -1; | |
4709 | } | |
4710 | } | |
4711 | ||
726f6388 JA |
4712 | void |
4713 | unlink_fifo_list () | |
4714 | { | |
f73dda09 JA |
4715 | int saved, i, j; |
4716 | ||
ccc6cda3 | 4717 | if (nfifo == 0) |
726f6388 JA |
4718 | return; |
4719 | ||
f73dda09 | 4720 | for (i = saved = 0; i < nfifo; i++) |
726f6388 | 4721 | { |
f73dda09 JA |
4722 | if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1)) |
4723 | { | |
7117c2d2 JA |
4724 | unlink (fifo_list[i].file); |
4725 | free (fifo_list[i].file); | |
4726 | fifo_list[i].file = (char *)NULL; | |
4727 | fifo_list[i].proc = -1; | |
f73dda09 JA |
4728 | } |
4729 | else | |
7117c2d2 | 4730 | saved++; |
f73dda09 JA |
4731 | } |
4732 | ||
4733 | /* If we didn't remove some of the FIFOs, compact the list. */ | |
4734 | if (saved) | |
4735 | { | |
4736 | for (i = j = 0; i < nfifo; i++) | |
4737 | if (fifo_list[i].file) | |
4738 | { | |
4739 | fifo_list[j].file = fifo_list[i].file; | |
4740 | fifo_list[j].proc = fifo_list[i].proc; | |
4741 | j++; | |
4742 | } | |
4743 | nfifo = j; | |
726f6388 | 4744 | } |
f73dda09 JA |
4745 | else |
4746 | nfifo = 0; | |
726f6388 JA |
4747 | } |
4748 | ||
495aee44 CR |
4749 | /* Take LIST, which is a bitmap denoting active FIFOs in fifo_list |
4750 | from some point in the past, and close all open FIFOs in fifo_list | |
4751 | that are not marked as active in LIST. If LIST is NULL, close | |
4752 | everything in fifo_list. LSIZE is the number of elements in LIST, in | |
4753 | case it's larger than fifo_list_size (size of fifo_list). */ | |
4754 | void | |
4755 | close_new_fifos (list, lsize) | |
4756 | char *list; | |
4757 | int lsize; | |
4758 | { | |
4759 | int i; | |
4760 | ||
4761 | if (list == 0) | |
4762 | { | |
4763 | unlink_fifo_list (); | |
4764 | return; | |
4765 | } | |
4766 | ||
4767 | for (i = 0; i < lsize; i++) | |
4768 | if (list[i] == 0 && i < fifo_list_size && fifo_list[i].proc != -1) | |
4769 | unlink_fifo (i); | |
4770 | ||
4771 | for (i = lsize; i < fifo_list_size; i++) | |
4772 | unlink_fifo (i); | |
4773 | } | |
4774 | ||
f1be666c JA |
4775 | int |
4776 | fifos_pending () | |
4777 | { | |
4778 | return nfifo; | |
4779 | } | |
4780 | ||
495aee44 CR |
4781 | int |
4782 | num_fifos () | |
4783 | { | |
4784 | return nfifo; | |
4785 | } | |
4786 | ||
726f6388 JA |
4787 | static char * |
4788 | make_named_pipe () | |
4789 | { | |
4790 | char *tname; | |
4791 | ||
3185942a | 4792 | tname = sh_mktmpname ("sh-np", MT_USERANDOM|MT_USETMPDIR); |
726f6388 JA |
4793 | if (mkfifo (tname, 0600) < 0) |
4794 | { | |
4795 | free (tname); | |
4796 | return ((char *)NULL); | |
4797 | } | |
4798 | ||
4799 | add_fifo_list (tname); | |
4800 | return (tname); | |
4801 | } | |
4802 | ||
726f6388 JA |
4803 | #else /* HAVE_DEV_FD */ |
4804 | ||
4805 | /* DEV_FD_LIST is a bitmap of file descriptors attached to pipes the shell | |
4806 | has open to children. NFDS is a count of the number of bits currently | |
4807 | set in DEV_FD_LIST. TOTFDS is a count of the highest possible number | |
4808 | of open files. */ | |
4809 | static char *dev_fd_list = (char *)NULL; | |
ccc6cda3 | 4810 | static int nfds; |
726f6388 JA |
4811 | static int totfds; /* The highest possible number of open files. */ |
4812 | ||
495aee44 CR |
4813 | char * |
4814 | copy_fifo_list (sizep) | |
4815 | int *sizep; | |
4816 | { | |
4817 | char *ret; | |
4818 | ||
4819 | if (nfds == 0 || totfds == 0) | |
4820 | { | |
4821 | if (sizep) | |
4822 | *sizep = 0; | |
4823 | return (char *)NULL; | |
4824 | } | |
4825 | ||
4826 | if (sizep) | |
4827 | *sizep = totfds; | |
4828 | ret = (char *)xmalloc (totfds); | |
4829 | return (memcpy (ret, dev_fd_list, totfds)); | |
4830 | } | |
4831 | ||
726f6388 JA |
4832 | static void |
4833 | add_fifo_list (fd) | |
4834 | int fd; | |
4835 | { | |
495aee44 | 4836 | if (dev_fd_list == 0 || fd >= totfds) |
726f6388 JA |
4837 | { |
4838 | int ofds; | |
4839 | ||
4840 | ofds = totfds; | |
4841 | totfds = getdtablesize (); | |
4842 | if (totfds < 0 || totfds > 256) | |
4843 | totfds = 256; | |
3185942a | 4844 | if (fd >= totfds) |
726f6388 JA |
4845 | totfds = fd + 2; |
4846 | ||
f73dda09 | 4847 | dev_fd_list = (char *)xrealloc (dev_fd_list, totfds); |
7117c2d2 | 4848 | memset (dev_fd_list + ofds, '\0', totfds - ofds); |
726f6388 JA |
4849 | } |
4850 | ||
4851 | dev_fd_list[fd] = 1; | |
4852 | nfds++; | |
4853 | } | |
4854 | ||
f1be666c JA |
4855 | int |
4856 | fifos_pending () | |
4857 | { | |
4858 | return 0; /* used for cleanup; not needed with /dev/fd */ | |
4859 | } | |
4860 | ||
495aee44 CR |
4861 | int |
4862 | num_fifos () | |
4863 | { | |
4864 | return nfds; | |
4865 | } | |
4866 | ||
4867 | void | |
4868 | unlink_fifo (fd) | |
4869 | int fd; | |
4870 | { | |
4871 | if (dev_fd_list[fd]) | |
4872 | { | |
4873 | close (fd); | |
4874 | dev_fd_list[fd] = 0; | |
4875 | nfds--; | |
4876 | } | |
4877 | } | |
4878 | ||
726f6388 JA |
4879 | void |
4880 | unlink_fifo_list () | |
4881 | { | |
4882 | register int i; | |
4883 | ||
ccc6cda3 | 4884 | if (nfds == 0) |
726f6388 JA |
4885 | return; |
4886 | ||
4887 | for (i = 0; nfds && i < totfds; i++) | |
495aee44 | 4888 | unlink_fifo (i); |
726f6388 JA |
4889 | |
4890 | nfds = 0; | |
4891 | } | |
4892 | ||
495aee44 CR |
4893 | /* Take LIST, which is a snapshot copy of dev_fd_list from some point in |
4894 | the past, and close all open fds in dev_fd_list that are not marked | |
4895 | as open in LIST. If LIST is NULL, close everything in dev_fd_list. | |
4896 | LSIZE is the number of elements in LIST, in case it's larger than | |
4897 | totfds (size of dev_fd_list). */ | |
4898 | void | |
4899 | close_new_fifos (list, lsize) | |
4900 | char *list; | |
4901 | int lsize; | |
4902 | { | |
4903 | int i; | |
4904 | ||
4905 | if (list == 0) | |
4906 | { | |
4907 | unlink_fifo_list (); | |
4908 | return; | |
4909 | } | |
4910 | ||
4911 | for (i = 0; i < lsize; i++) | |
4912 | if (list[i] == 0 && i < totfds && dev_fd_list[i]) | |
4913 | unlink_fifo (i); | |
4914 | ||
4915 | for (i = lsize; i < totfds; i++) | |
4916 | unlink_fifo (i); | |
4917 | } | |
4918 | ||
726f6388 JA |
4919 | #if defined (NOTDEF) |
4920 | print_dev_fd_list () | |
4921 | { | |
4922 | register int i; | |
4923 | ||
f73dda09 | 4924 | fprintf (stderr, "pid %ld: dev_fd_list:", (long)getpid ()); |
726f6388 JA |
4925 | fflush (stderr); |
4926 | ||
4927 | for (i = 0; i < totfds; i++) | |
4928 | { | |
4929 | if (dev_fd_list[i]) | |
4930 | fprintf (stderr, " %d", i); | |
4931 | } | |
4932 | fprintf (stderr, "\n"); | |
4933 | } | |
4934 | #endif /* NOTDEF */ | |
4935 | ||
4936 | static char * | |
4937 | make_dev_fd_filename (fd) | |
4938 | int fd; | |
4939 | { | |
f73dda09 | 4940 | char *ret, intbuf[INT_STRLEN_BOUND (int) + 1], *p; |
726f6388 | 4941 | |
17345e5a | 4942 | ret = (char *)xmalloc (sizeof (DEV_FD_PREFIX) + 8); |
bb70624e JA |
4943 | |
4944 | strcpy (ret, DEV_FD_PREFIX); | |
4945 | p = inttostr (fd, intbuf, sizeof (intbuf)); | |
4946 | strcpy (ret + sizeof (DEV_FD_PREFIX) - 1, p); | |
4947 | ||
726f6388 JA |
4948 | add_fifo_list (fd); |
4949 | return (ret); | |
4950 | } | |
4951 | ||
4952 | #endif /* HAVE_DEV_FD */ | |
4953 | ||
4954 | /* Return a filename that will open a connection to the process defined by | |
4955 | executing STRING. HAVE_DEV_FD, if defined, means open a pipe and return | |
4956 | a filename in /dev/fd corresponding to a descriptor that is one of the | |
4957 | ends of the pipe. If not defined, we use named pipes on systems that have | |
4958 | them. Systems without /dev/fd and named pipes are out of luck. | |
4959 | ||
4960 | OPEN_FOR_READ_IN_CHILD, if 1, means open the named pipe for reading or | |
4961 | use the read end of the pipe and dup that file descriptor to fd 0 in | |
4962 | the child. If OPEN_FOR_READ_IN_CHILD is 0, we open the named pipe for | |
4963 | writing or use the write end of the pipe in the child, and dup that | |
4964 | file descriptor to fd 1 in the child. The parent does the opposite. */ | |
4965 | ||
4966 | static char * | |
4967 | process_substitute (string, open_for_read_in_child) | |
4968 | char *string; | |
4969 | int open_for_read_in_child; | |
4970 | { | |
4971 | char *pathname; | |
4972 | int fd, result; | |
4973 | pid_t old_pid, pid; | |
4974 | #if defined (HAVE_DEV_FD) | |
4975 | int parent_pipe_fd, child_pipe_fd; | |
4976 | int fildes[2]; | |
4977 | #endif /* HAVE_DEV_FD */ | |
4978 | #if defined (JOB_CONTROL) | |
4979 | pid_t old_pipeline_pgrp; | |
ccc6cda3 | 4980 | #endif |
726f6388 | 4981 | |
cce855bc | 4982 | if (!string || !*string || wordexp_only) |
726f6388 JA |
4983 | return ((char *)NULL); |
4984 | ||
4985 | #if !defined (HAVE_DEV_FD) | |
4986 | pathname = make_named_pipe (); | |
4987 | #else /* HAVE_DEV_FD */ | |
4988 | if (pipe (fildes) < 0) | |
4989 | { | |
b80f6443 | 4990 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
4991 | return ((char *)NULL); |
4992 | } | |
4993 | /* If OPEN_FOR_READ_IN_CHILD == 1, we want to use the write end of | |
4994 | the pipe in the parent, otherwise the read end. */ | |
4995 | parent_pipe_fd = fildes[open_for_read_in_child]; | |
4996 | child_pipe_fd = fildes[1 - open_for_read_in_child]; | |
d166f048 JA |
4997 | /* Move the parent end of the pipe to some high file descriptor, to |
4998 | avoid clashes with FDs used by the script. */ | |
4999 | parent_pipe_fd = move_to_high_fd (parent_pipe_fd, 1, 64); | |
5000 | ||
726f6388 JA |
5001 | pathname = make_dev_fd_filename (parent_pipe_fd); |
5002 | #endif /* HAVE_DEV_FD */ | |
5003 | ||
3185942a | 5004 | if (pathname == 0) |
726f6388 | 5005 | { |
b80f6443 | 5006 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
5007 | return ((char *)NULL); |
5008 | } | |
5009 | ||
5010 | old_pid = last_made_pid; | |
5011 | ||
5012 | #if defined (JOB_CONTROL) | |
5013 | old_pipeline_pgrp = pipeline_pgrp; | |
5014 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 5015 | save_pipeline (1); |
ccc6cda3 JA |
5016 | #endif /* JOB_CONTROL */ |
5017 | ||
726f6388 JA |
5018 | pid = make_child ((char *)NULL, 1); |
5019 | if (pid == 0) | |
5020 | { | |
ccc6cda3 | 5021 | reset_terminating_signals (); /* XXX */ |
b80f6443 | 5022 | free_pushed_string_input (); |
726f6388 | 5023 | /* Cancel traps, in trap.c. */ |
495aee44 | 5024 | restore_original_signals (); /* XXX - what about special builtins? bash-4.2 */ |
726f6388 | 5025 | setup_async_signals (); |
3185942a | 5026 | subshell_environment |= SUBSHELL_COMSUB|SUBSHELL_PROCSUB; |
726f6388 | 5027 | } |
ccc6cda3 JA |
5028 | |
5029 | #if defined (JOB_CONTROL) | |
726f6388 JA |
5030 | set_sigchld_handler (); |
5031 | stop_making_children (); | |
3185942a | 5032 | /* XXX - should we only do this in the parent? (as in command subst) */ |
726f6388 | 5033 | pipeline_pgrp = old_pipeline_pgrp; |
ccc6cda3 | 5034 | #endif /* JOB_CONTROL */ |
726f6388 JA |
5035 | |
5036 | if (pid < 0) | |
5037 | { | |
b80f6443 | 5038 | sys_error (_("cannot make child for process substitution")); |
726f6388 JA |
5039 | free (pathname); |
5040 | #if defined (HAVE_DEV_FD) | |
5041 | close (parent_pipe_fd); | |
5042 | close (child_pipe_fd); | |
5043 | #endif /* HAVE_DEV_FD */ | |
5044 | return ((char *)NULL); | |
5045 | } | |
5046 | ||
5047 | if (pid > 0) | |
5048 | { | |
ccc6cda3 JA |
5049 | #if defined (JOB_CONTROL) |
5050 | restore_pipeline (1); | |
5051 | #endif | |
5052 | ||
f73dda09 JA |
5053 | #if !defined (HAVE_DEV_FD) |
5054 | fifo_list[nfifo-1].proc = pid; | |
5055 | #endif | |
5056 | ||
726f6388 JA |
5057 | last_made_pid = old_pid; |
5058 | ||
5059 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) | |
5060 | close_pgrp_pipe (); | |
5061 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
5062 | ||
5063 | #if defined (HAVE_DEV_FD) | |
5064 | close (child_pipe_fd); | |
5065 | #endif /* HAVE_DEV_FD */ | |
5066 | ||
5067 | return (pathname); | |
5068 | } | |
5069 | ||
5070 | set_sigint_handler (); | |
5071 | ||
5072 | #if defined (JOB_CONTROL) | |
5073 | set_job_control (0); | |
5074 | #endif /* JOB_CONTROL */ | |
5075 | ||
5076 | #if !defined (HAVE_DEV_FD) | |
5077 | /* Open the named pipe in the child. */ | |
ccc6cda3 | 5078 | fd = open (pathname, open_for_read_in_child ? O_RDONLY|O_NONBLOCK : O_WRONLY); |
726f6388 JA |
5079 | if (fd < 0) |
5080 | { | |
b80f6443 JA |
5081 | /* Two separate strings for ease of translation. */ |
5082 | if (open_for_read_in_child) | |
5083 | sys_error (_("cannot open named pipe %s for reading"), pathname); | |
5084 | else | |
5085 | sys_error (_("cannot open named pipe %s for writing"), pathname); | |
5086 | ||
726f6388 JA |
5087 | exit (127); |
5088 | } | |
bb70624e JA |
5089 | if (open_for_read_in_child) |
5090 | { | |
28ef6c31 | 5091 | if (sh_unset_nodelay_mode (fd) < 0) |
bb70624e | 5092 | { |
3185942a | 5093 | sys_error (_("cannot reset nodelay mode for fd %d"), fd); |
bb70624e JA |
5094 | exit (127); |
5095 | } | |
5096 | } | |
726f6388 JA |
5097 | #else /* HAVE_DEV_FD */ |
5098 | fd = child_pipe_fd; | |
5099 | #endif /* HAVE_DEV_FD */ | |
5100 | ||
5101 | if (dup2 (fd, open_for_read_in_child ? 0 : 1) < 0) | |
5102 | { | |
b80f6443 | 5103 | sys_error (_("cannot duplicate named pipe %s as fd %d"), pathname, |
ccc6cda3 | 5104 | open_for_read_in_child ? 0 : 1); |
726f6388 JA |
5105 | exit (127); |
5106 | } | |
5107 | ||
f73dda09 JA |
5108 | if (fd != (open_for_read_in_child ? 0 : 1)) |
5109 | close (fd); | |
726f6388 JA |
5110 | |
5111 | /* Need to close any files that this process has open to pipes inherited | |
5112 | from its parent. */ | |
5113 | if (current_fds_to_close) | |
5114 | { | |
5115 | close_fd_bitmap (current_fds_to_close); | |
5116 | current_fds_to_close = (struct fd_bitmap *)NULL; | |
5117 | } | |
5118 | ||
5119 | #if defined (HAVE_DEV_FD) | |
5120 | /* Make sure we close the parent's end of the pipe and clear the slot | |
5121 | in the fd list so it is not closed later, if reallocated by, for | |
5122 | instance, pipe(2). */ | |
5123 | close (parent_pipe_fd); | |
5124 | dev_fd_list[parent_pipe_fd] = 0; | |
5125 | #endif /* HAVE_DEV_FD */ | |
5126 | ||
d166f048 | 5127 | result = parse_and_execute (string, "process substitution", (SEVAL_NONINT|SEVAL_NOHIST)); |
726f6388 JA |
5128 | |
5129 | #if !defined (HAVE_DEV_FD) | |
5130 | /* Make sure we close the named pipe in the child before we exit. */ | |
5131 | close (open_for_read_in_child ? 0 : 1); | |
5132 | #endif /* !HAVE_DEV_FD */ | |
5133 | ||
5134 | exit (result); | |
5135 | /*NOTREACHED*/ | |
5136 | } | |
5137 | #endif /* PROCESS_SUBSTITUTION */ | |
5138 | ||
cce855bc JA |
5139 | /***********************************/ |
5140 | /* */ | |
5141 | /* Command Substitution */ | |
5142 | /* */ | |
5143 | /***********************************/ | |
5144 | ||
d166f048 | 5145 | static char * |
3185942a | 5146 | read_comsub (fd, quoted, rflag) |
d166f048 | 5147 | int fd, quoted; |
3185942a | 5148 | int *rflag; |
d166f048 | 5149 | { |
3185942a JA |
5150 | char *istring, buf[128], *bufp, *s; |
5151 | int istring_index, istring_size, c, tflag, skip_ctlesc, skip_ctlnul; | |
f73dda09 | 5152 | ssize_t bufn; |
d166f048 JA |
5153 | |
5154 | istring = (char *)NULL; | |
3185942a JA |
5155 | istring_index = istring_size = bufn = tflag = 0; |
5156 | ||
5157 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) | |
5158 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
d166f048 | 5159 | |
3185942a JA |
5160 | /* Read the output of the command through the pipe. This may need to be |
5161 | changed to understand multibyte characters in the future. */ | |
d166f048 JA |
5162 | while (1) |
5163 | { | |
5164 | if (fd < 0) | |
28ef6c31 | 5165 | break; |
d166f048 JA |
5166 | if (--bufn <= 0) |
5167 | { | |
bb70624e | 5168 | bufn = zread (fd, buf, sizeof (buf)); |
d166f048 JA |
5169 | if (bufn <= 0) |
5170 | break; | |
5171 | bufp = buf; | |
5172 | } | |
5173 | c = *bufp++; | |
5174 | ||
28ef6c31 JA |
5175 | if (c == 0) |
5176 | { | |
5177 | #if 0 | |
5178 | internal_warning ("read_comsub: ignored null byte in input"); | |
5179 | #endif | |
5180 | continue; | |
5181 | } | |
5182 | ||
d166f048 JA |
5183 | /* Add the character to ISTRING, possibly after resizing it. */ |
5184 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE); | |
5185 | ||
f1be666c JA |
5186 | /* This is essentially quote_string inline */ |
5187 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */) | |
5188 | istring[istring_index++] = CTLESC; | |
5189 | /* Escape CTLESC and CTLNUL in the output to protect those characters | |
5190 | from the rest of the word expansions (word splitting and globbing.) | |
5191 | This is essentially quote_escapes inline. */ | |
3185942a JA |
5192 | else if (skip_ctlesc == 0 && c == CTLESC) |
5193 | { | |
5194 | tflag |= W_HASCTLESC; | |
5195 | istring[istring_index++] = CTLESC; | |
5196 | } | |
5197 | else if ((skip_ctlnul == 0 && c == CTLNUL) || (c == ' ' && (ifs_value && *ifs_value == 0))) | |
d166f048 JA |
5198 | istring[istring_index++] = CTLESC; |
5199 | ||
5200 | istring[istring_index++] = c; | |
28ef6c31 JA |
5201 | |
5202 | #if 0 | |
5203 | #if defined (__CYGWIN__) | |
5204 | if (c == '\n' && istring_index > 1 && istring[istring_index - 2] == '\r') | |
5205 | { | |
5206 | istring_index--; | |
5207 | istring[istring_index - 1] = '\n'; | |
5208 | } | |
5209 | #endif | |
5210 | #endif | |
d166f048 JA |
5211 | } |
5212 | ||
5213 | if (istring) | |
5214 | istring[istring_index] = '\0'; | |
5215 | ||
5216 | /* If we read no output, just return now and save ourselves some | |
5217 | trouble. */ | |
5218 | if (istring_index == 0) | |
5219 | { | |
5220 | FREE (istring); | |
3185942a JA |
5221 | if (rflag) |
5222 | *rflag = tflag; | |
d166f048 JA |
5223 | return (char *)NULL; |
5224 | } | |
5225 | ||
5226 | /* Strip trailing newlines from the output of the command. */ | |
5227 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
5228 | { | |
5229 | while (istring_index > 0) | |
5230 | { | |
5231 | if (istring[istring_index - 1] == '\n') | |
5232 | { | |
5233 | --istring_index; | |
5234 | ||
5235 | /* If the newline was quoted, remove the quoting char. */ | |
5236 | if (istring[istring_index - 1] == CTLESC) | |
5237 | --istring_index; | |
5238 | } | |
5239 | else | |
5240 | break; | |
5241 | } | |
5242 | istring[istring_index] = '\0'; | |
5243 | } | |
5244 | else | |
5245 | strip_trailing (istring, istring_index - 1, 1); | |
5246 | ||
3185942a JA |
5247 | if (rflag) |
5248 | *rflag = tflag; | |
d166f048 JA |
5249 | return istring; |
5250 | } | |
5251 | ||
3185942a JA |
5252 | /* Perform command substitution on STRING. This returns a WORD_DESC * with the |
5253 | contained string possibly quoted. */ | |
5254 | WORD_DESC * | |
726f6388 JA |
5255 | command_substitute (string, quoted) |
5256 | char *string; | |
5257 | int quoted; | |
5258 | { | |
95732b49 | 5259 | pid_t pid, old_pid, old_pipeline_pgrp, old_async_pid; |
ccc6cda3 | 5260 | char *istring; |
3185942a JA |
5261 | int result, fildes[2], function_value, pflags, rc, tflag; |
5262 | WORD_DESC *ret; | |
726f6388 | 5263 | |
ccc6cda3 | 5264 | istring = (char *)NULL; |
726f6388 JA |
5265 | |
5266 | /* Don't fork () if there is no need to. In the case of no command to | |
5267 | run, just return NULL. */ | |
5268 | if (!string || !*string || (string[0] == '\n' && !string[1])) | |
3185942a | 5269 | return ((WORD_DESC *)NULL); |
726f6388 | 5270 | |
cce855bc JA |
5271 | if (wordexp_only && read_but_dont_execute) |
5272 | { | |
0001803f | 5273 | last_command_exit_value = EX_WEXPCOMSUB; |
cce855bc JA |
5274 | jump_to_top_level (EXITPROG); |
5275 | } | |
5276 | ||
bb70624e JA |
5277 | /* We're making the assumption here that the command substitution will |
5278 | eventually run a command from the file system. Since we'll run | |
5279 | maybe_make_export_env in this subshell before executing that command, | |
5280 | the parent shell and any other shells it starts will have to remake | |
5281 | the environment. If we make it before we fork, other shells won't | |
5282 | have to. Don't bother if we have any temporary variable assignments, | |
5283 | though, because the export environment will be remade after this | |
5284 | command completes anyway, but do it if all the words to be expanded | |
5285 | are variable assignments. */ | |
5286 | if (subst_assign_varlist == 0 || garglist == 0) | |
5287 | maybe_make_export_env (); /* XXX */ | |
5288 | ||
b80f6443 | 5289 | /* Flags to pass to parse_and_execute() */ |
0001803f | 5290 | pflags = (interactive && sourcelevel == 0) ? SEVAL_RESETLINE : 0; |
b80f6443 | 5291 | |
726f6388 JA |
5292 | /* Pipe the output of executing STRING into the current shell. */ |
5293 | if (pipe (fildes) < 0) | |
5294 | { | |
b80f6443 | 5295 | sys_error (_("cannot make pipe for command substitution")); |
726f6388 JA |
5296 | goto error_exit; |
5297 | } | |
5298 | ||
5299 | old_pid = last_made_pid; | |
5300 | #if defined (JOB_CONTROL) | |
ccc6cda3 | 5301 | old_pipeline_pgrp = pipeline_pgrp; |
28ef6c31 JA |
5302 | /* Don't reset the pipeline pgrp if we're already a subshell in a pipeline. */ |
5303 | if ((subshell_environment & SUBSHELL_PIPE) == 0) | |
5304 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 5305 | cleanup_the_pipeline (); |
95732b49 | 5306 | #endif /* JOB_CONTROL */ |
726f6388 | 5307 | |
95732b49 | 5308 | old_async_pid = last_asynchronous_pid; |
95732b49 | 5309 | pid = make_child ((char *)NULL, subshell_environment&SUBSHELL_ASYNC); |
95732b49 JA |
5310 | last_asynchronous_pid = old_async_pid; |
5311 | ||
726f6388 | 5312 | if (pid == 0) |
495aee44 CR |
5313 | { |
5314 | /* Reset the signal handlers in the child, but don't free the | |
5315 | trap strings. Set a flag noting that we have to free the | |
5316 | trap strings if we run trap to change a signal disposition. */ | |
5317 | reset_signal_handlers (); | |
5318 | subshell_environment |= SUBSHELL_RESETTRAP; | |
5319 | } | |
ccc6cda3 JA |
5320 | |
5321 | #if defined (JOB_CONTROL) | |
3185942a | 5322 | /* XXX DO THIS ONLY IN PARENT ? XXX */ |
ccc6cda3 JA |
5323 | set_sigchld_handler (); |
5324 | stop_making_children (); | |
f1be666c JA |
5325 | if (pid != 0) |
5326 | pipeline_pgrp = old_pipeline_pgrp; | |
f73dda09 JA |
5327 | #else |
5328 | stop_making_children (); | |
ccc6cda3 | 5329 | #endif /* JOB_CONTROL */ |
726f6388 JA |
5330 | |
5331 | if (pid < 0) | |
5332 | { | |
b80f6443 | 5333 | sys_error (_("cannot make child for command substitution")); |
726f6388 JA |
5334 | error_exit: |
5335 | ||
5336 | FREE (istring); | |
5337 | close (fildes[0]); | |
5338 | close (fildes[1]); | |
3185942a | 5339 | return ((WORD_DESC *)NULL); |
726f6388 JA |
5340 | } |
5341 | ||
5342 | if (pid == 0) | |
5343 | { | |
5344 | set_sigint_handler (); /* XXX */ | |
28ef6c31 | 5345 | |
b80f6443 JA |
5346 | free_pushed_string_input (); |
5347 | ||
726f6388 JA |
5348 | if (dup2 (fildes[1], 1) < 0) |
5349 | { | |
b80f6443 | 5350 | sys_error (_("command_substitute: cannot duplicate pipe as fd 1")); |
726f6388 JA |
5351 | exit (EXECUTION_FAILURE); |
5352 | } | |
5353 | ||
5354 | /* If standard output is closed in the parent shell | |
5355 | (such as after `exec >&-'), file descriptor 1 will be | |
5356 | the lowest available file descriptor, and end up in | |
5357 | fildes[0]. This can happen for stdin and stderr as well, | |
5358 | but stdout is more important -- it will cause no output | |
5359 | to be generated from this command. */ | |
5360 | if ((fildes[1] != fileno (stdin)) && | |
5361 | (fildes[1] != fileno (stdout)) && | |
5362 | (fildes[1] != fileno (stderr))) | |
5363 | close (fildes[1]); | |
5364 | ||
5365 | if ((fildes[0] != fileno (stdin)) && | |
5366 | (fildes[0] != fileno (stdout)) && | |
5367 | (fildes[0] != fileno (stderr))) | |
5368 | close (fildes[0]); | |
5369 | ||
495aee44 CR |
5370 | #ifdef __CYGWIN__ |
5371 | /* Let stdio know the fd may have changed from text to binary mode, and | |
5372 | make sure to preserve stdout line buffering. */ | |
5373 | freopen (NULL, "w", stdout); | |
5374 | sh_setlinebuf (stdout); | |
5375 | #endif /* __CYGWIN__ */ | |
5376 | ||
726f6388 JA |
5377 | /* The currently executing shell is not interactive. */ |
5378 | interactive = 0; | |
5379 | ||
ccc6cda3 | 5380 | /* This is a subshell environment. */ |
28ef6c31 | 5381 | subshell_environment |= SUBSHELL_COMSUB; |
ccc6cda3 | 5382 | |
28ef6c31 | 5383 | /* When not in POSIX mode, command substitution does not inherit |
7117c2d2 | 5384 | the -e flag. */ |
28ef6c31 JA |
5385 | if (posixly_correct == 0) |
5386 | exit_immediately_on_error = 0; | |
726f6388 JA |
5387 | |
5388 | remove_quoted_escapes (string); | |
5389 | ||
ccc6cda3 | 5390 | startup_state = 2; /* see if we can avoid a fork */ |
726f6388 JA |
5391 | /* Give command substitution a place to jump back to on failure, |
5392 | so we don't go back up to main (). */ | |
5393 | result = setjmp (top_level); | |
5394 | ||
bb70624e JA |
5395 | /* If we're running a command substitution inside a shell function, |
5396 | trap `return' so we don't return from the function in the subshell | |
5397 | and go off to never-never land. */ | |
5398 | if (result == 0 && return_catch_flag) | |
5399 | function_value = setjmp (return_catch); | |
5400 | else | |
5401 | function_value = 0; | |
5402 | ||
b80f6443 JA |
5403 | if (result == ERREXIT) |
5404 | rc = last_command_exit_value; | |
5405 | else if (result == EXITPROG) | |
5406 | rc = last_command_exit_value; | |
726f6388 | 5407 | else if (result) |
b80f6443 | 5408 | rc = EXECUTION_FAILURE; |
bb70624e | 5409 | else if (function_value) |
b80f6443 | 5410 | rc = return_catch_value; |
726f6388 | 5411 | else |
b80f6443 JA |
5412 | { |
5413 | subshell_level++; | |
5414 | rc = parse_and_execute (string, "command substitution", pflags|SEVAL_NOHIST); | |
5415 | subshell_level--; | |
5416 | } | |
5417 | ||
5418 | last_command_exit_value = rc; | |
5419 | rc = run_exit_trap (); | |
f1be666c JA |
5420 | #if defined (PROCESS_SUBSTITUTION) |
5421 | unlink_fifo_list (); | |
5422 | #endif | |
b80f6443 | 5423 | exit (rc); |
726f6388 JA |
5424 | } |
5425 | else | |
5426 | { | |
726f6388 JA |
5427 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) |
5428 | close_pgrp_pipe (); | |
5429 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
5430 | ||
5431 | close (fildes[1]); | |
5432 | ||
3185942a JA |
5433 | tflag = 0; |
5434 | istring = read_comsub (fildes[0], quoted, &tflag); | |
ccc6cda3 | 5435 | |
726f6388 JA |
5436 | close (fildes[0]); |
5437 | ||
b72432fd | 5438 | current_command_subst_pid = pid; |
726f6388 JA |
5439 | last_command_exit_value = wait_for (pid); |
5440 | last_command_subst_pid = pid; | |
5441 | last_made_pid = old_pid; | |
5442 | ||
5443 | #if defined (JOB_CONTROL) | |
5444 | /* If last_command_exit_value > 128, then the substituted command | |
5445 | was terminated by a signal. If that signal was SIGINT, then send | |
5446 | SIGINT to ourselves. This will break out of loops, for instance. */ | |
b80f6443 | 5447 | if (last_command_exit_value == (128 + SIGINT) && last_command_exit_signal == SIGINT) |
726f6388 JA |
5448 | kill (getpid (), SIGINT); |
5449 | ||
5450 | /* wait_for gives the terminal back to shell_pgrp. If some other | |
cce855bc JA |
5451 | process group should have it, give it away to that group here. |
5452 | pipeline_pgrp is non-zero only while we are constructing a | |
5453 | pipline, so what we are concerned about is whether or not that | |
5454 | pipeline was started in the background. A pipeline started in | |
5455 | the background should never get the tty back here. */ | |
28ef6c31 | 5456 | if (interactive && pipeline_pgrp != (pid_t)0 && (subshell_environment & SUBSHELL_ASYNC) == 0) |
28ef6c31 | 5457 | give_terminal_to (pipeline_pgrp, 0); |
726f6388 JA |
5458 | #endif /* JOB_CONTROL */ |
5459 | ||
3185942a JA |
5460 | ret = alloc_word_desc (); |
5461 | ret->word = istring; | |
5462 | ret->flags = tflag; | |
5463 | ||
5464 | return ret; | |
726f6388 JA |
5465 | } |
5466 | } | |
5467 | ||
5468 | /******************************************************** | |
5469 | * * | |
5470 | * Utility functions for parameter expansion * | |
5471 | * * | |
5472 | ********************************************************/ | |
5473 | ||
ccc6cda3 | 5474 | #if defined (ARRAY_VARS) |
ccc6cda3 | 5475 | |
f73dda09 | 5476 | static arrayind_t |
ccc6cda3 JA |
5477 | array_length_reference (s) |
5478 | char *s; | |
5479 | { | |
f73dda09 JA |
5480 | int len; |
5481 | arrayind_t ind; | |
3185942a | 5482 | char *akey; |
f73dda09 | 5483 | char *t, c; |
ccc6cda3 | 5484 | ARRAY *array; |
495aee44 | 5485 | HASH_TABLE *h; |
ccc6cda3 JA |
5486 | SHELL_VAR *var; |
5487 | ||
5488 | var = array_variable_part (s, &t, &len); | |
726f6388 | 5489 | |
ccc6cda3 JA |
5490 | /* If unbound variables should generate an error, report one and return |
5491 | failure. */ | |
3185942a | 5492 | if ((var == 0 || (assoc_p (var) == 0 && array_p (var) == 0)) && unbound_vars_is_error) |
726f6388 | 5493 | { |
f73dda09 | 5494 | c = *--t; |
ccc6cda3 | 5495 | *t = '\0'; |
0001803f | 5496 | last_command_exit_value = EXECUTION_FAILURE; |
7117c2d2 | 5497 | err_unboundvar (s); |
f73dda09 | 5498 | *t = c; |
ccc6cda3 | 5499 | return (-1); |
726f6388 | 5500 | } |
ccc6cda3 JA |
5501 | else if (var == 0) |
5502 | return 0; | |
726f6388 | 5503 | |
28ef6c31 JA |
5504 | /* We support a couple of expansions for variables that are not arrays. |
5505 | We'll return the length of the value for v[0], and 1 for v[@] or | |
5506 | v[*]. Return 0 for everything else. */ | |
5507 | ||
5508 | array = array_p (var) ? array_cell (var) : (ARRAY *)NULL; | |
495aee44 | 5509 | h = assoc_p (var) ? assoc_cell (var) : (HASH_TABLE *)NULL; |
726f6388 | 5510 | |
ccc6cda3 | 5511 | if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']') |
ccc6cda3 | 5512 | { |
3185942a | 5513 | if (assoc_p (var)) |
495aee44 | 5514 | return (h ? assoc_num_elements (h) : 0); |
3185942a | 5515 | else if (array_p (var)) |
495aee44 | 5516 | return (array ? array_num_elements (array) : 0); |
3185942a | 5517 | else |
495aee44 | 5518 | return (var_isset (var) ? 1 : 0); |
ccc6cda3 | 5519 | } |
ccc6cda3 | 5520 | |
3185942a JA |
5521 | if (assoc_p (var)) |
5522 | { | |
5523 | t[len - 1] = '\0'; | |
5524 | akey = expand_assignment_string_to_string (t, 0); /* [ */ | |
5525 | t[len - 1] = ']'; | |
5526 | if (akey == 0 || *akey == 0) | |
5527 | { | |
5528 | err_badarraysub (t); | |
5529 | return (-1); | |
5530 | } | |
5531 | t = assoc_reference (assoc_cell (var), akey); | |
5532 | } | |
28ef6c31 | 5533 | else |
3185942a JA |
5534 | { |
5535 | ind = array_expand_index (t, len); | |
5536 | if (ind < 0) | |
5537 | { | |
5538 | err_badarraysub (t); | |
5539 | return (-1); | |
5540 | } | |
5541 | if (array_p (var)) | |
5542 | t = array_reference (array, ind); | |
5543 | else | |
5544 | t = (ind == 0) ? value_cell (var) : (char *)NULL; | |
5545 | } | |
28ef6c31 | 5546 | |
f1be666c | 5547 | len = MB_STRLEN (t); |
ccc6cda3 | 5548 | return (len); |
726f6388 | 5549 | } |
ccc6cda3 | 5550 | #endif /* ARRAY_VARS */ |
726f6388 JA |
5551 | |
5552 | static int | |
5553 | valid_brace_expansion_word (name, var_is_special) | |
5554 | char *name; | |
5555 | int var_is_special; | |
5556 | { | |
f73dda09 | 5557 | if (DIGIT (*name) && all_digits (name)) |
726f6388 JA |
5558 | return 1; |
5559 | else if (var_is_special) | |
5560 | return 1; | |
ccc6cda3 JA |
5561 | #if defined (ARRAY_VARS) |
5562 | else if (valid_array_reference (name)) | |
5563 | return 1; | |
5564 | #endif /* ARRAY_VARS */ | |
726f6388 JA |
5565 | else if (legal_identifier (name)) |
5566 | return 1; | |
5567 | else | |
5568 | return 0; | |
5569 | } | |
ccc6cda3 | 5570 | |
b80f6443 JA |
5571 | static int |
5572 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at) | |
5573 | char *name; | |
5574 | int quoted; | |
5575 | int *quoted_dollar_atp, *contains_dollar_at; | |
5576 | { | |
5577 | char *temp1; | |
5578 | ||
5579 | if (name == 0) | |
5580 | { | |
5581 | if (quoted_dollar_atp) | |
5582 | *quoted_dollar_atp = 0; | |
5583 | if (contains_dollar_at) | |
5584 | *contains_dollar_at = 0; | |
5585 | return 0; | |
5586 | } | |
5587 | ||
5588 | /* check for $@ and $* */ | |
5589 | if (name[0] == '@' && name[1] == 0) | |
5590 | { | |
5591 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5592 | *quoted_dollar_atp = 1; | |
5593 | if (contains_dollar_at) | |
5594 | *contains_dollar_at = 1; | |
5595 | return 1; | |
5596 | } | |
5597 | else if (name[0] == '*' && name[1] == '\0' && quoted == 0) | |
5598 | { | |
5599 | if (contains_dollar_at) | |
5600 | *contains_dollar_at = 1; | |
5601 | return 1; | |
5602 | } | |
5603 | ||
5604 | /* Now check for ${array[@]} and ${array[*]} */ | |
5605 | #if defined (ARRAY_VARS) | |
5606 | else if (valid_array_reference (name)) | |
5607 | { | |
0001803f | 5608 | temp1 = mbschr (name, '['); |
b80f6443 JA |
5609 | if (temp1 && temp1[1] == '@' && temp1[2] == ']') |
5610 | { | |
5611 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5612 | *quoted_dollar_atp = 1; | |
5613 | if (contains_dollar_at) | |
5614 | *contains_dollar_at = 1; | |
5615 | return 1; | |
5616 | } /* [ */ | |
5617 | /* ${array[*]}, when unquoted, should be treated like ${array[@]}, | |
5618 | which should result in separate words even when IFS is unset. */ | |
5619 | if (temp1 && temp1[1] == '*' && temp1[2] == ']' && quoted == 0) | |
5620 | { | |
5621 | if (contains_dollar_at) | |
5622 | *contains_dollar_at = 1; | |
5623 | return 1; | |
5624 | } | |
5625 | } | |
5626 | #endif | |
5627 | return 0; | |
5628 | } | |
5629 | ||
726f6388 JA |
5630 | /* Parameter expand NAME, and return a new string which is the expansion, |
5631 | or NULL if there was no expansion. | |
5632 | VAR_IS_SPECIAL is non-zero if NAME is one of the special variables in | |
5633 | the shell, e.g., "@", "$", "*", etc. QUOTED, if non-zero, means that | |
5634 | NAME was found inside of a double-quoted expression. */ | |
95732b49 | 5635 | static WORD_DESC * |
495aee44 | 5636 | parameter_brace_expand_word (name, var_is_special, quoted, pflags, indp) |
726f6388 | 5637 | char *name; |
89a92869 | 5638 | int var_is_special, quoted, pflags; |
495aee44 | 5639 | arrayind_t *indp; |
726f6388 | 5640 | { |
95732b49 | 5641 | WORD_DESC *ret; |
ccc6cda3 | 5642 | char *temp, *tt; |
7117c2d2 | 5643 | intmax_t arg_index; |
ccc6cda3 | 5644 | SHELL_VAR *var; |
f1be666c | 5645 | int atype, rflags; |
495aee44 | 5646 | arrayind_t ind; |
726f6388 | 5647 | |
95732b49 JA |
5648 | ret = 0; |
5649 | temp = 0; | |
f1be666c | 5650 | rflags = 0; |
95732b49 | 5651 | |
495aee44 CR |
5652 | if (indp) |
5653 | *indp = INTMAX_MIN; | |
5654 | ||
95732b49 | 5655 | /* Handle multiple digit arguments, as in ${11}. */ |
f73dda09 | 5656 | if (legal_number (name, &arg_index)) |
7117c2d2 JA |
5657 | { |
5658 | tt = get_dollar_var_value (arg_index); | |
b80f6443 JA |
5659 | if (tt) |
5660 | temp = (*tt && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
5661 | ? quote_string (tt) | |
5662 | : quote_escapes (tt); | |
5663 | else | |
5664 | temp = (char *)NULL; | |
7117c2d2 JA |
5665 | FREE (tt); |
5666 | } | |
726f6388 JA |
5667 | else if (var_is_special) /* ${@} */ |
5668 | { | |
cce855bc | 5669 | int sindex; |
f73dda09 | 5670 | tt = (char *)xmalloc (2 + strlen (name)); |
cce855bc | 5671 | tt[sindex = 0] = '$'; |
726f6388 | 5672 | strcpy (tt + 1, name); |
7117c2d2 | 5673 | |
95732b49 | 5674 | ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL, |
89a92869 | 5675 | (int *)NULL, (int *)NULL, pflags); |
cce855bc | 5676 | free (tt); |
726f6388 | 5677 | } |
ccc6cda3 JA |
5678 | #if defined (ARRAY_VARS) |
5679 | else if (valid_array_reference (name)) | |
5680 | { | |
495aee44 | 5681 | temp = array_value (name, quoted, 0, &atype, &ind); |
7117c2d2 | 5682 | if (atype == 0 && temp) |
495aee44 CR |
5683 | { |
5684 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
5685 | ? quote_string (temp) | |
5686 | : quote_escapes (temp); | |
5687 | rflags |= W_ARRAYIND; | |
5688 | if (indp) | |
5689 | *indp = ind; | |
5690 | } | |
f1be666c JA |
5691 | else if (atype == 1 && temp && QUOTED_NULL (temp) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5692 | rflags |= W_HASQUOTEDNULL; | |
ccc6cda3 JA |
5693 | } |
5694 | #endif | |
5695 | else if (var = find_variable (name)) | |
5696 | { | |
7117c2d2 | 5697 | if (var_isset (var) && invisible_p (var) == 0) |
28ef6c31 | 5698 | { |
ccc6cda3 | 5699 | #if defined (ARRAY_VARS) |
3185942a JA |
5700 | if (assoc_p (var)) |
5701 | temp = assoc_reference (assoc_cell (var), "0"); | |
5702 | else if (array_p (var)) | |
5703 | temp = array_reference (array_cell (var), 0); | |
5704 | else | |
5705 | temp = value_cell (var); | |
ccc6cda3 JA |
5706 | #else |
5707 | temp = value_cell (var); | |
5708 | #endif | |
5709 | ||
5710 | if (temp) | |
b80f6443 JA |
5711 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5712 | ? quote_string (temp) | |
5713 | : quote_escapes (temp); | |
28ef6c31 | 5714 | } |
ccc6cda3 JA |
5715 | else |
5716 | temp = (char *)NULL; | |
5717 | } | |
726f6388 | 5718 | else |
ccc6cda3 | 5719 | temp = (char *)NULL; |
726f6388 | 5720 | |
95732b49 JA |
5721 | if (ret == 0) |
5722 | { | |
5723 | ret = alloc_word_desc (); | |
5724 | ret->word = temp; | |
f1be666c | 5725 | ret->flags |= rflags; |
95732b49 JA |
5726 | } |
5727 | return ret; | |
726f6388 JA |
5728 | } |
5729 | ||
ccc6cda3 JA |
5730 | /* Expand an indirect reference to a variable: ${!NAME} expands to the |
5731 | value of the variable whose name is the value of NAME. */ | |
95732b49 | 5732 | static WORD_DESC * |
b80f6443 | 5733 | parameter_brace_expand_indir (name, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at) |
ccc6cda3 JA |
5734 | char *name; |
5735 | int var_is_special, quoted; | |
b80f6443 | 5736 | int *quoted_dollar_atp, *contains_dollar_at; |
ccc6cda3 JA |
5737 | { |
5738 | char *temp, *t; | |
95732b49 | 5739 | WORD_DESC *w; |
ccc6cda3 | 5740 | |
495aee44 | 5741 | w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND, 0); |
95732b49 | 5742 | t = w->word; |
b80f6443 JA |
5743 | /* Have to dequote here if necessary */ |
5744 | if (t) | |
5745 | { | |
5746 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
5747 | ? dequote_string (t) | |
5748 | : dequote_escapes (t); | |
5749 | free (t); | |
5750 | t = temp; | |
5751 | } | |
95732b49 JA |
5752 | dispose_word_desc (w); |
5753 | ||
b80f6443 | 5754 | chk_atstar (t, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 | 5755 | if (t == 0) |
95732b49 JA |
5756 | return (WORD_DESC *)NULL; |
5757 | ||
495aee44 | 5758 | w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0, 0); |
ccc6cda3 | 5759 | free (t); |
95732b49 JA |
5760 | |
5761 | return w; | |
ccc6cda3 JA |
5762 | } |
5763 | ||
726f6388 JA |
5764 | /* Expand the right side of a parameter expansion of the form ${NAMEcVALUE}, |
5765 | depending on the value of C, the separating character. C can be one of | |
ccc6cda3 JA |
5766 | "-", "+", or "=". QUOTED is true if the entire brace expression occurs |
5767 | between double quotes. */ | |
95732b49 | 5768 | static WORD_DESC * |
ccc6cda3 | 5769 | parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat) |
726f6388 | 5770 | char *name, *value; |
ccc6cda3 | 5771 | int c, quoted, *qdollaratp, *hasdollarat; |
726f6388 | 5772 | { |
95732b49 | 5773 | WORD_DESC *w; |
726f6388 JA |
5774 | WORD_LIST *l; |
5775 | char *t, *t1, *temp; | |
ccc6cda3 | 5776 | int hasdol; |
726f6388 | 5777 | |
ccc6cda3 JA |
5778 | /* If the entire expression is between double quotes, we want to treat |
5779 | the value as a double-quoted string, with the exception that we strip | |
3185942a | 5780 | embedded unescaped double quotes (for sh backwards compatibility). */ |
95732b49 | 5781 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *value) |
726f6388 | 5782 | { |
ccc6cda3 | 5783 | hasdol = 0; |
95732b49 | 5784 | temp = string_extract_double_quoted (value, &hasdol, 1); |
726f6388 | 5785 | } |
95732b49 JA |
5786 | else |
5787 | temp = value; | |
ccc6cda3 | 5788 | |
95732b49 | 5789 | w = alloc_word_desc (); |
726f6388 | 5790 | hasdol = 0; |
ccc6cda3 JA |
5791 | /* XXX was 0 not quoted */ |
5792 | l = *temp ? expand_string_for_rhs (temp, quoted, &hasdol, (int *)NULL) | |
5793 | : (WORD_LIST *)0; | |
5794 | if (hasdollarat) | |
5795 | *hasdollarat = hasdol || (l && l->next); | |
95732b49 JA |
5796 | if (temp != value) |
5797 | free (temp); | |
726f6388 JA |
5798 | if (l) |
5799 | { | |
ccc6cda3 | 5800 | /* The expansion of TEMP returned something. We need to treat things |
b80f6443 JA |
5801 | slightly differently if HASDOL is non-zero. If we have "$@", the |
5802 | individual words have already been quoted. We need to turn them | |
5803 | into a string with the words separated by the first character of | |
5804 | $IFS without any additional quoting, so string_list_dollar_at won't | |
5805 | do the right thing. We use string_list_dollar_star instead. */ | |
5806 | temp = (hasdol || l->next) ? string_list_dollar_star (l) : string_list (l); | |
5807 | ||
ccc6cda3 JA |
5808 | /* If l->next is not null, we know that TEMP contained "$@", since that |
5809 | is the only expansion that creates more than one word. */ | |
b80f6443 | 5810 | if (qdollaratp && ((hasdol && quoted) || l->next)) |
ccc6cda3 | 5811 | *qdollaratp = 1; |
726f6388 JA |
5812 | dispose_words (l); |
5813 | } | |
ccc6cda3 | 5814 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol) |
726f6388 | 5815 | { |
ccc6cda3 JA |
5816 | /* The brace expansion occurred between double quotes and there was |
5817 | a $@ in TEMP. It does not matter if the $@ is quoted, as long as | |
7117c2d2 JA |
5818 | it does not expand to anything. In this case, we want to return |
5819 | a quoted empty string. */ | |
0628567a | 5820 | temp = make_quoted_char ('\0'); |
95732b49 | 5821 | w->flags |= W_HASQUOTEDNULL; |
726f6388 JA |
5822 | } |
5823 | else | |
5824 | temp = (char *)NULL; | |
5825 | ||
5826 | if (c == '-' || c == '+') | |
95732b49 JA |
5827 | { |
5828 | w->word = temp; | |
5829 | return w; | |
5830 | } | |
726f6388 JA |
5831 | |
5832 | /* c == '=' */ | |
ccc6cda3 | 5833 | t = temp ? savestring (temp) : savestring (""); |
726f6388 JA |
5834 | t1 = dequote_string (t); |
5835 | free (t); | |
b80f6443 JA |
5836 | #if defined (ARRAY_VARS) |
5837 | if (valid_array_reference (name)) | |
95732b49 | 5838 | assign_array_element (name, t1, 0); |
b80f6443 JA |
5839 | else |
5840 | #endif /* ARRAY_VARS */ | |
95732b49 | 5841 | bind_variable (name, t1, 0); |
95732b49 | 5842 | |
495aee44 CR |
5843 | /* From Posix group discussion Feb-March 2010. Issue 7 0000221 */ |
5844 | free (temp); | |
5845 | ||
5846 | w->word = t1; | |
95732b49 | 5847 | return w; |
726f6388 JA |
5848 | } |
5849 | ||
5850 | /* Deal with the right hand side of a ${name:?value} expansion in the case | |
5851 | that NAME is null or not set. If VALUE is non-null it is expanded and | |
5852 | used as the error message to print, otherwise a standard message is | |
5853 | printed. */ | |
5854 | static void | |
5855 | parameter_brace_expand_error (name, value) | |
5856 | char *name, *value; | |
5857 | { | |
ccc6cda3 JA |
5858 | WORD_LIST *l; |
5859 | char *temp; | |
5860 | ||
726f6388 JA |
5861 | if (value && *value) |
5862 | { | |
95732b49 | 5863 | l = expand_string (value, 0); |
ccc6cda3 JA |
5864 | temp = string_list (l); |
5865 | report_error ("%s: %s", name, temp ? temp : ""); /* XXX was value not "" */ | |
5866 | FREE (temp); | |
726f6388 JA |
5867 | dispose_words (l); |
5868 | } | |
5869 | else | |
b80f6443 | 5870 | report_error (_("%s: parameter null or not set"), name); |
726f6388 JA |
5871 | |
5872 | /* Free the data we have allocated during this expansion, since we | |
5873 | are about to longjmp out. */ | |
5874 | free (name); | |
5875 | FREE (value); | |
5876 | } | |
5877 | ||
5878 | /* Return 1 if NAME is something for which parameter_brace_expand_length is | |
5879 | OK to do. */ | |
5880 | static int | |
5881 | valid_length_expression (name) | |
5882 | char *name; | |
5883 | { | |
28ef6c31 | 5884 | return (name[1] == '\0' || /* ${#} */ |
f73dda09 JA |
5885 | ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') || /* special param */ |
5886 | (DIGIT (name[1]) && all_digits (name + 1)) || /* ${#11} */ | |
ccc6cda3 JA |
5887 | #if defined (ARRAY_VARS) |
5888 | valid_array_reference (name + 1) || /* ${#a[7]} */ | |
5889 | #endif | |
726f6388 JA |
5890 | legal_identifier (name + 1)); /* ${#PS1} */ |
5891 | } | |
5892 | ||
5893 | /* Handle the parameter brace expansion that requires us to return the | |
5894 | length of a parameter. */ | |
7117c2d2 | 5895 | static intmax_t |
726f6388 JA |
5896 | parameter_brace_expand_length (name) |
5897 | char *name; | |
5898 | { | |
ccc6cda3 | 5899 | char *t, *newname; |
7117c2d2 | 5900 | intmax_t number, arg_index; |
ccc6cda3 JA |
5901 | WORD_LIST *list; |
5902 | #if defined (ARRAY_VARS) | |
5903 | SHELL_VAR *var; | |
5904 | #endif | |
5905 | ||
5906 | if (name[1] == '\0') /* ${#} */ | |
5907 | number = number_of_args (); | |
cce855bc JA |
5908 | else if ((name[1] == '@' || name[1] == '*') && name[2] == '\0') /* ${#@}, ${#*} */ |
5909 | number = number_of_args (); | |
f73dda09 | 5910 | else if ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') |
cce855bc JA |
5911 | { |
5912 | /* Take the lengths of some of the shell's special parameters. */ | |
5913 | switch (name[1]) | |
5914 | { | |
5915 | case '-': | |
5916 | t = which_set_flags (); | |
5917 | break; | |
5918 | case '?': | |
5919 | t = itos (last_command_exit_value); | |
5920 | break; | |
5921 | case '$': | |
5922 | t = itos (dollar_dollar_pid); | |
5923 | break; | |
5924 | case '!': | |
5925 | if (last_asynchronous_pid == NO_PID) | |
495aee44 | 5926 | t = (char *)NULL; /* XXX - error if set -u set? */ |
cce855bc | 5927 | else |
f73dda09 | 5928 | t = itos (last_asynchronous_pid); |
cce855bc JA |
5929 | break; |
5930 | case '#': | |
5931 | t = itos (number_of_args ()); | |
5932 | break; | |
5933 | } | |
5934 | number = STRLEN (t); | |
5935 | FREE (t); | |
5936 | } | |
ccc6cda3 JA |
5937 | #if defined (ARRAY_VARS) |
5938 | else if (valid_array_reference (name + 1)) | |
5939 | number = array_length_reference (name + 1); | |
5940 | #endif /* ARRAY_VARS */ | |
cce855bc | 5941 | else |
ccc6cda3 JA |
5942 | { |
5943 | number = 0; | |
5944 | ||
f73dda09 | 5945 | if (legal_number (name + 1, &arg_index)) /* ${#1} */ |
ccc6cda3 | 5946 | { |
f73dda09 | 5947 | t = get_dollar_var_value (arg_index); |
495aee44 CR |
5948 | if (t == 0 && unbound_vars_is_error) |
5949 | return INTMAX_MIN; | |
eb873671 | 5950 | number = MB_STRLEN (t); |
ccc6cda3 JA |
5951 | FREE (t); |
5952 | } | |
5953 | #if defined (ARRAY_VARS) | |
3185942a | 5954 | else if ((var = find_variable (name + 1)) && (invisible_p (var) == 0) && (array_p (var) || assoc_p (var))) |
ccc6cda3 | 5955 | { |
3185942a JA |
5956 | if (assoc_p (var)) |
5957 | t = assoc_reference (assoc_cell (var), "0"); | |
5958 | else | |
5959 | t = array_reference (array_cell (var), 0); | |
495aee44 CR |
5960 | if (t == 0 && unbound_vars_is_error) |
5961 | return INTMAX_MIN; | |
eb873671 | 5962 | number = MB_STRLEN (t); |
ccc6cda3 JA |
5963 | } |
5964 | #endif | |
5965 | else /* ${#PS1} */ | |
5966 | { | |
5967 | newname = savestring (name); | |
5968 | newname[0] = '$'; | |
5969 | list = expand_string (newname, Q_DOUBLE_QUOTES); | |
5970 | t = list ? string_list (list) : (char *)NULL; | |
5971 | free (newname); | |
5972 | if (list) | |
5973 | dispose_words (list); | |
5974 | ||
495aee44 | 5975 | number = t ? MB_STRLEN (t) : 0; |
ccc6cda3 JA |
5976 | FREE (t); |
5977 | } | |
5978 | } | |
ccc6cda3 JA |
5979 | |
5980 | return (number); | |
5981 | } | |
5982 | ||
28ef6c31 JA |
5983 | /* Skip characters in SUBSTR until DELIM. SUBSTR is an arithmetic expression, |
5984 | so we do some ad-hoc parsing of an arithmetic expression to find | |
5985 | the first DELIM, instead of using strchr(3). Two rules: | |
5986 | 1. If the substring contains a `(', read until closing `)'. | |
5987 | 2. If the substring contains a `?', read past one `:' for each `?'. | |
5988 | */ | |
5989 | ||
5990 | static char * | |
5991 | skiparith (substr, delim) | |
5992 | char *substr; | |
5993 | int delim; | |
5994 | { | |
7117c2d2 JA |
5995 | size_t sublen; |
5996 | int skipcol, pcount, i; | |
5997 | DECLARE_MBSTATE; | |
28ef6c31 | 5998 | |
7117c2d2 JA |
5999 | sublen = strlen (substr); |
6000 | i = skipcol = pcount = 0; | |
6001 | while (substr[i]) | |
28ef6c31 JA |
6002 | { |
6003 | /* Balance parens */ | |
7117c2d2 | 6004 | if (substr[i] == LPAREN) |
28ef6c31 JA |
6005 | { |
6006 | pcount++; | |
7117c2d2 | 6007 | i++; |
28ef6c31 JA |
6008 | continue; |
6009 | } | |
7117c2d2 | 6010 | if (substr[i] == RPAREN && pcount) |
28ef6c31 JA |
6011 | { |
6012 | pcount--; | |
7117c2d2 | 6013 | i++; |
28ef6c31 JA |
6014 | continue; |
6015 | } | |
6016 | if (pcount) | |
7117c2d2 JA |
6017 | { |
6018 | ADVANCE_CHAR (substr, sublen, i); | |
6019 | continue; | |
6020 | } | |
28ef6c31 JA |
6021 | |
6022 | /* Skip one `:' for each `?' */ | |
7117c2d2 | 6023 | if (substr[i] == ':' && skipcol) |
28ef6c31 JA |
6024 | { |
6025 | skipcol--; | |
7117c2d2 | 6026 | i++; |
28ef6c31 JA |
6027 | continue; |
6028 | } | |
7117c2d2 | 6029 | if (substr[i] == delim) |
28ef6c31 | 6030 | break; |
7117c2d2 | 6031 | if (substr[i] == '?') |
28ef6c31 JA |
6032 | { |
6033 | skipcol++; | |
7117c2d2 | 6034 | i++; |
28ef6c31 JA |
6035 | continue; |
6036 | } | |
7117c2d2 | 6037 | ADVANCE_CHAR (substr, sublen, i); |
28ef6c31 | 6038 | } |
7117c2d2 JA |
6039 | |
6040 | return (substr + i); | |
28ef6c31 JA |
6041 | } |
6042 | ||
ccc6cda3 JA |
6043 | /* Verify and limit the start and end of the desired substring. If |
6044 | VTYPE == 0, a regular shell variable is being used; if it is 1, | |
cce855bc | 6045 | then the positional parameters are being used; if it is 2, then |
e8ce775d JA |
6046 | VALUE is really a pointer to an array variable that should be used. |
6047 | Return value is 1 if both values were OK, 0 if there was a problem | |
6048 | with an invalid expression, or -1 if the values were out of range. */ | |
ccc6cda3 | 6049 | static int |
3185942a JA |
6050 | verify_substring_values (v, value, substr, vtype, e1p, e2p) |
6051 | SHELL_VAR *v; | |
ccc6cda3 | 6052 | char *value, *substr; |
f73dda09 | 6053 | int vtype; |
7117c2d2 | 6054 | intmax_t *e1p, *e2p; |
ccc6cda3 | 6055 | { |
bb70624e | 6056 | char *t, *temp1, *temp2; |
f73dda09 JA |
6057 | arrayind_t len; |
6058 | int expok; | |
ccc6cda3 JA |
6059 | #if defined (ARRAY_VARS) |
6060 | ARRAY *a; | |
3185942a | 6061 | HASH_TABLE *h; |
ccc6cda3 JA |
6062 | #endif |
6063 | ||
28ef6c31 JA |
6064 | /* duplicate behavior of strchr(3) */ |
6065 | t = skiparith (substr, ':'); | |
6066 | if (*t && *t == ':') | |
7117c2d2 | 6067 | *t = '\0'; |
28ef6c31 JA |
6068 | else |
6069 | t = (char *)0; | |
f73dda09 | 6070 | |
0628567a | 6071 | temp1 = expand_arith_string (substr, Q_DOUBLE_QUOTES); |
d166f048 | 6072 | *e1p = evalexp (temp1, &expok); |
ccc6cda3 | 6073 | free (temp1); |
d166f048 JA |
6074 | if (expok == 0) |
6075 | return (0); | |
ccc6cda3 | 6076 | |
f73dda09 | 6077 | len = -1; /* paranoia */ |
ccc6cda3 JA |
6078 | switch (vtype) |
6079 | { | |
6080 | case VT_VARIABLE: | |
d166f048 | 6081 | case VT_ARRAYMEMBER: |
eb873671 | 6082 | len = MB_STRLEN (value); |
ccc6cda3 JA |
6083 | break; |
6084 | case VT_POSPARMS: | |
6085 | len = number_of_args () + 1; | |
3185942a JA |
6086 | if (*e1p == 0) |
6087 | len++; /* add one arg if counting from $0 */ | |
ccc6cda3 JA |
6088 | break; |
6089 | #if defined (ARRAY_VARS) | |
6090 | case VT_ARRAYVAR: | |
eb873671 | 6091 | /* For arrays, the first value deals with array indices. Negative |
3185942a JA |
6092 | offsets count from one past the array's maximum index. Associative |
6093 | arrays treat the number of elements as the maximum index. */ | |
6094 | if (assoc_p (v)) | |
6095 | { | |
6096 | h = assoc_cell (v); | |
6097 | len = assoc_num_elements (h) + (*e1p < 0); | |
6098 | } | |
6099 | else | |
6100 | { | |
6101 | a = (ARRAY *)value; | |
6102 | len = array_max_index (a) + (*e1p < 0); /* arrays index from 0 to n - 1 */ | |
6103 | } | |
ccc6cda3 JA |
6104 | break; |
6105 | #endif | |
6106 | } | |
6107 | ||
f73dda09 JA |
6108 | if (len == -1) /* paranoia */ |
6109 | return -1; | |
6110 | ||
ccc6cda3 JA |
6111 | if (*e1p < 0) /* negative offsets count from end */ |
6112 | *e1p += len; | |
6113 | ||
eb873671 | 6114 | if (*e1p > len || *e1p < 0) |
e8ce775d | 6115 | return (-1); |
d166f048 | 6116 | |
b80f6443 JA |
6117 | #if defined (ARRAY_VARS) |
6118 | /* For arrays, the second offset deals with the number of elements. */ | |
6119 | if (vtype == VT_ARRAYVAR) | |
3185942a | 6120 | len = assoc_p (v) ? assoc_num_elements (h) : array_num_elements (a); |
b80f6443 JA |
6121 | #endif |
6122 | ||
ccc6cda3 JA |
6123 | if (t) |
6124 | { | |
6125 | t++; | |
bb70624e | 6126 | temp2 = savestring (t); |
0628567a | 6127 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
bb70624e | 6128 | free (temp2); |
ccc6cda3 | 6129 | t[-1] = ':'; |
d166f048 | 6130 | *e2p = evalexp (temp1, &expok); |
ccc6cda3 | 6131 | free (temp1); |
d166f048 | 6132 | if (expok == 0) |
28ef6c31 | 6133 | return (0); |
495aee44 | 6134 | if ((vtype == VT_ARRAYVAR || vtype == VT_POSPARMS) && *e2p < 0) |
28ef6c31 | 6135 | { |
b80f6443 | 6136 | internal_error (_("%s: substring expression < 0"), t); |
ccc6cda3 | 6137 | return (0); |
28ef6c31 | 6138 | } |
b80f6443 JA |
6139 | #if defined (ARRAY_VARS) |
6140 | /* In order to deal with sparse arrays, push the intelligence about how | |
6141 | to deal with the number of elements desired down to the array- | |
6142 | specific functions. */ | |
6143 | if (vtype != VT_ARRAYVAR) | |
6144 | #endif | |
6145 | { | |
495aee44 CR |
6146 | if (*e2p < 0) |
6147 | { | |
6148 | *e2p += len; | |
6149 | if (*e2p < 0 || *e2p < *e1p) | |
6150 | { | |
6151 | internal_error (_("%s: substring expression < 0"), t); | |
6152 | return (0); | |
6153 | } | |
6154 | } | |
6155 | else | |
6156 | *e2p += *e1p; /* want E2 chars starting at E1 */ | |
b80f6443 JA |
6157 | if (*e2p > len) |
6158 | *e2p = len; | |
6159 | } | |
ccc6cda3 JA |
6160 | } |
6161 | else | |
6162 | *e2p = len; | |
6163 | ||
6164 | return (1); | |
6165 | } | |
6166 | ||
ccc6cda3 | 6167 | /* Return the type of variable specified by VARNAME (simple variable, |
cce855bc | 6168 | positional param, or array variable). Also return the value specified |
7117c2d2 | 6169 | by VARNAME (value of a variable or a reference to an array element). |
495aee44 CR |
6170 | QUOTED is the standard description of quoting state, using Q_* defines. |
6171 | FLAGS is currently a set of flags to pass to array_value. If IND is | |
6172 | non-null and not INTMAX_MIN, and FLAGS includes AV_USEIND, IND is | |
6173 | passed to array_value so the array index is not computed again. | |
7117c2d2 JA |
6174 | If this returns VT_VARIABLE, the caller assumes that CTLESC and CTLNUL |
6175 | characters in the value are quoted with CTLESC and takes appropriate | |
6176 | steps. For convenience, *VALP is set to the dequoted VALUE. */ | |
ccc6cda3 | 6177 | static int |
495aee44 | 6178 | get_var_and_type (varname, value, ind, quoted, flags, varp, valp) |
ccc6cda3 | 6179 | char *varname, *value; |
495aee44 CR |
6180 | arrayind_t ind; |
6181 | int quoted, flags; | |
ccc6cda3 JA |
6182 | SHELL_VAR **varp; |
6183 | char **valp; | |
6184 | { | |
6185 | int vtype; | |
6186 | char *temp; | |
6187 | #if defined (ARRAY_VARS) | |
6188 | SHELL_VAR *v; | |
6189 | #endif | |
495aee44 | 6190 | arrayind_t lind; |
ccc6cda3 | 6191 | |
7117c2d2 JA |
6192 | /* This sets vtype to VT_VARIABLE or VT_POSPARMS */ |
6193 | vtype = (varname[0] == '@' || varname[0] == '*') && varname[1] == '\0'; | |
b80f6443 JA |
6194 | if (vtype == VT_POSPARMS && varname[0] == '*') |
6195 | vtype |= VT_STARSUB; | |
ccc6cda3 JA |
6196 | *varp = (SHELL_VAR *)NULL; |
6197 | ||
6198 | #if defined (ARRAY_VARS) | |
6199 | if (valid_array_reference (varname)) | |
6200 | { | |
6201 | v = array_variable_part (varname, &temp, (int *)0); | |
495aee44 CR |
6202 | /* If we want to signal array_value to use an already-computed index, |
6203 | set LIND to that index */ | |
6204 | lind = (ind != INTMAX_MIN && (flags & AV_USEIND)) ? ind : 0; | |
3185942a | 6205 | if (v && (array_p (v) || assoc_p (v))) |
f73dda09 JA |
6206 | { /* [ */ |
6207 | if (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']') | |
ccc6cda3 | 6208 | { |
3185942a | 6209 | /* Callers have to differentiate betwen indexed and associative */ |
ccc6cda3 | 6210 | vtype = VT_ARRAYVAR; |
b80f6443 JA |
6211 | if (temp[0] == '*') |
6212 | vtype |= VT_STARSUB; | |
3185942a | 6213 | *valp = array_p (v) ? (char *)array_cell (v) : (char *)assoc_cell (v); |
ccc6cda3 JA |
6214 | } |
6215 | else | |
6216 | { | |
d166f048 | 6217 | vtype = VT_ARRAYMEMBER; |
495aee44 | 6218 | *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind); |
ccc6cda3 JA |
6219 | } |
6220 | *varp = v; | |
6221 | } | |
95732b49 JA |
6222 | else if (v && (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']')) |
6223 | { | |
6224 | vtype = VT_VARIABLE; | |
6225 | *varp = v; | |
6226 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6227 | *valp = dequote_string (value); | |
6228 | else | |
6229 | *valp = dequote_escapes (value); | |
6230 | } | |
ccc6cda3 | 6231 | else |
3185942a JA |
6232 | { |
6233 | vtype = VT_ARRAYMEMBER; | |
6234 | *varp = v; | |
495aee44 | 6235 | *valp = array_value (varname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind); |
3185942a | 6236 | } |
ccc6cda3 | 6237 | } |
3185942a | 6238 | else if ((v = find_variable (varname)) && (invisible_p (v) == 0) && (assoc_p (v) || array_p (v))) |
ccc6cda3 | 6239 | { |
7117c2d2 | 6240 | vtype = VT_ARRAYMEMBER; |
ccc6cda3 | 6241 | *varp = v; |
3185942a | 6242 | *valp = assoc_p (v) ? assoc_reference (assoc_cell (v), "0") : array_reference (array_cell (v), 0); |
ccc6cda3 JA |
6243 | } |
6244 | else | |
6245 | #endif | |
b80f6443 JA |
6246 | { |
6247 | if (value && vtype == VT_VARIABLE) | |
6248 | { | |
6249 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6250 | *valp = dequote_string (value); | |
6251 | else | |
6252 | *valp = dequote_escapes (value); | |
6253 | } | |
6254 | else | |
6255 | *valp = value; | |
6256 | } | |
ccc6cda3 JA |
6257 | |
6258 | return vtype; | |
6259 | } | |
6260 | ||
cce855bc JA |
6261 | /******************************************************/ |
6262 | /* */ | |
6263 | /* Functions to extract substrings of variable values */ | |
6264 | /* */ | |
6265 | /******************************************************/ | |
6266 | ||
b80f6443 JA |
6267 | #if defined (HANDLE_MULTIBYTE) |
6268 | /* Character-oriented rather than strictly byte-oriented substrings. S and | |
6269 | E, rather being strict indices into STRING, indicate character (possibly | |
6270 | multibyte character) positions that require calculation. | |
6271 | Used by the ${param:offset[:length]} expansion. */ | |
6272 | static char * | |
6273 | mb_substring (string, s, e) | |
6274 | char *string; | |
6275 | int s, e; | |
6276 | { | |
6277 | char *tt; | |
6278 | int start, stop, i, slen; | |
6279 | DECLARE_MBSTATE; | |
6280 | ||
6281 | start = 0; | |
95732b49 JA |
6282 | /* Don't need string length in ADVANCE_CHAR unless multibyte chars possible. */ |
6283 | slen = (MB_CUR_MAX > 1) ? STRLEN (string) : 0; | |
b80f6443 JA |
6284 | |
6285 | i = s; | |
6286 | while (string[start] && i--) | |
6287 | ADVANCE_CHAR (string, slen, start); | |
6288 | stop = start; | |
6289 | i = e - s; | |
6290 | while (string[stop] && i--) | |
6291 | ADVANCE_CHAR (string, slen, stop); | |
6292 | tt = substring (string, start, stop); | |
6293 | return tt; | |
6294 | } | |
6295 | #endif | |
6296 | ||
ccc6cda3 JA |
6297 | /* Process a variable substring expansion: ${name:e1[:e2]}. If VARNAME |
6298 | is `@', use the positional parameters; otherwise, use the value of | |
6299 | VARNAME. If VARNAME is an array variable, use the array elements. */ | |
6300 | ||
6301 | static char * | |
495aee44 CR |
6302 | parameter_brace_substring (varname, value, ind, substr, quoted, flags) |
6303 | char *varname, *value; | |
6304 | int ind; | |
6305 | char *substr; | |
6306 | int quoted, flags; | |
ccc6cda3 | 6307 | { |
7117c2d2 | 6308 | intmax_t e1, e2; |
b80f6443 | 6309 | int vtype, r, starsub; |
0628567a | 6310 | char *temp, *val, *tt, *oname; |
ccc6cda3 JA |
6311 | SHELL_VAR *v; |
6312 | ||
6313 | if (value == 0) | |
6314 | return ((char *)NULL); | |
6315 | ||
0628567a | 6316 | oname = this_command_name; |
ccc6cda3 JA |
6317 | this_command_name = varname; |
6318 | ||
495aee44 | 6319 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
ccc6cda3 | 6320 | if (vtype == -1) |
0628567a JA |
6321 | { |
6322 | this_command_name = oname; | |
6323 | return ((char *)NULL); | |
6324 | } | |
ccc6cda3 | 6325 | |
b80f6443 JA |
6326 | starsub = vtype & VT_STARSUB; |
6327 | vtype &= ~VT_STARSUB; | |
6328 | ||
3185942a | 6329 | r = verify_substring_values (v, val, substr, vtype, &e1, &e2); |
0628567a | 6330 | this_command_name = oname; |
e8ce775d | 6331 | if (r <= 0) |
7117c2d2 | 6332 | return ((r == 0) ? &expand_param_error : (char *)NULL); |
ccc6cda3 JA |
6333 | |
6334 | switch (vtype) | |
6335 | { | |
6336 | case VT_VARIABLE: | |
d166f048 | 6337 | case VT_ARRAYMEMBER: |
b80f6443 JA |
6338 | #if defined (HANDLE_MULTIBYTE) |
6339 | if (MB_CUR_MAX > 1) | |
6340 | tt = mb_substring (val, e1, e2); | |
6341 | else | |
6342 | #endif | |
7117c2d2 | 6343 | tt = substring (val, e1, e2); |
b80f6443 | 6344 | |
7117c2d2 JA |
6345 | if (vtype == VT_VARIABLE) |
6346 | FREE (val); | |
6347 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6348 | temp = quote_string (tt); | |
6349 | else | |
6350 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6351 | FREE (tt); | |
ccc6cda3 JA |
6352 | break; |
6353 | case VT_POSPARMS: | |
7117c2d2 JA |
6354 | tt = pos_params (varname, e1, e2, quoted); |
6355 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) | |
6356 | { | |
6357 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6358 | FREE (tt); | |
6359 | } | |
6360 | else | |
6361 | temp = tt; | |
ccc6cda3 JA |
6362 | break; |
6363 | #if defined (ARRAY_VARS) | |
6364 | case VT_ARRAYVAR: | |
3185942a JA |
6365 | if (assoc_p (v)) |
6366 | /* we convert to list and take first e2 elements starting at e1th | |
6367 | element -- officially undefined for now */ | |
6368 | temp = assoc_subrange (assoc_cell (v), e1, e2, starsub, quoted); | |
6369 | else | |
b80f6443 JA |
6370 | /* We want E2 to be the number of elements desired (arrays can be sparse, |
6371 | so verify_substring_values just returns the numbers specified and we | |
6372 | rely on array_subrange to understand how to deal with them). */ | |
3185942a | 6373 | temp = array_subrange (array_cell (v), e1, e2, starsub, quoted); |
f1be666c JA |
6374 | /* array_subrange now calls array_quote_escapes as appropriate, so the |
6375 | caller no longer needs to. */ | |
ccc6cda3 JA |
6376 | break; |
6377 | #endif | |
f73dda09 JA |
6378 | default: |
6379 | temp = (char *)NULL; | |
ccc6cda3 JA |
6380 | } |
6381 | ||
6382 | return temp; | |
6383 | } | |
6384 | ||
cce855bc JA |
6385 | /****************************************************************/ |
6386 | /* */ | |
6387 | /* Functions to perform pattern substitution on variable values */ | |
6388 | /* */ | |
6389 | /****************************************************************/ | |
6390 | ||
495aee44 CR |
6391 | static int |
6392 | shouldexp_replacement (s) | |
6393 | char *s; | |
6394 | { | |
6395 | register char *p; | |
6396 | ||
6397 | for (p = s; p && *p; p++) | |
6398 | { | |
6399 | if (*p == '\\') | |
6400 | p++; | |
6401 | else if (*p == '&') | |
6402 | return 1; | |
6403 | } | |
6404 | return 0; | |
6405 | } | |
6406 | ||
ccc6cda3 JA |
6407 | char * |
6408 | pat_subst (string, pat, rep, mflags) | |
6409 | char *string, *pat, *rep; | |
6410 | int mflags; | |
6411 | { | |
495aee44 CR |
6412 | char *ret, *s, *e, *str, *rstr, *mstr; |
6413 | int rsize, rptr, l, replen, mtype, rxpand, rslen, mlen; | |
6414 | ||
6415 | if (string == 0) | |
6416 | return (savestring ("")); | |
ccc6cda3 | 6417 | |
b72432fd JA |
6418 | mtype = mflags & MATCH_TYPEMASK; |
6419 | ||
495aee44 CR |
6420 | #if 0 /* bash-4.2 ? */ |
6421 | rxpand = (rep && *rep) ? shouldexp_replacement (rep) : 0; | |
6422 | #else | |
6423 | rxpand = 0; | |
6424 | #endif | |
6425 | ||
b72432fd JA |
6426 | /* Special cases: |
6427 | * 1. A null pattern with mtype == MATCH_BEG means to prefix STRING | |
6428 | * with REP and return the result. | |
6429 | * 2. A null pattern with mtype == MATCH_END means to append REP to | |
6430 | * STRING and return the result. | |
495aee44 | 6431 | * These don't understand or process `&' in the replacement string. |
b72432fd JA |
6432 | */ |
6433 | if ((pat == 0 || *pat == 0) && (mtype == MATCH_BEG || mtype == MATCH_END)) | |
6434 | { | |
6435 | replen = STRLEN (rep); | |
495aee44 | 6436 | l = STRLEN (string); |
f73dda09 | 6437 | ret = (char *)xmalloc (replen + l + 2); |
bb70624e JA |
6438 | if (replen == 0) |
6439 | strcpy (ret, string); | |
6440 | else if (mtype == MATCH_BEG) | |
b72432fd JA |
6441 | { |
6442 | strcpy (ret, rep); | |
6443 | strcpy (ret + replen, string); | |
6444 | } | |
6445 | else | |
6446 | { | |
6447 | strcpy (ret, string); | |
6448 | strcpy (ret + l, rep); | |
6449 | } | |
6450 | return (ret); | |
6451 | } | |
6452 | ||
f73dda09 | 6453 | ret = (char *)xmalloc (rsize = 64); |
ccc6cda3 JA |
6454 | ret[0] = '\0'; |
6455 | ||
ccc6cda3 JA |
6456 | for (replen = STRLEN (rep), rptr = 0, str = string;;) |
6457 | { | |
6458 | if (match_pattern (str, pat, mtype, &s, &e) == 0) | |
6459 | break; | |
6460 | l = s - str; | |
495aee44 CR |
6461 | |
6462 | if (rxpand) | |
6463 | { | |
6464 | int x; | |
6465 | mlen = e - s; | |
6466 | mstr = xmalloc (mlen + 1); | |
6467 | for (x = 0; x < mlen; x++) | |
6468 | mstr[x] = s[x]; | |
6469 | mstr[mlen] = '\0'; | |
6470 | rstr = strcreplace (rep, '&', mstr, 0); | |
6471 | rslen = strlen (rstr); | |
6472 | } | |
6473 | else | |
6474 | { | |
6475 | rstr = rep; | |
6476 | rslen = replen; | |
6477 | } | |
6478 | ||
6479 | RESIZE_MALLOCED_BUFFER (ret, rptr, (l + rslen), rsize, 64); | |
ccc6cda3 JA |
6480 | |
6481 | /* OK, now copy the leading unmatched portion of the string (from | |
6482 | str to s) to ret starting at rptr (the current offset). Then copy | |
28ef6c31 JA |
6483 | the replacement string at ret + rptr + (s - str). Increment |
6484 | rptr (if necessary) and str and go on. */ | |
ccc6cda3 JA |
6485 | if (l) |
6486 | { | |
6487 | strncpy (ret + rptr, str, l); | |
6488 | rptr += l; | |
6489 | } | |
6490 | if (replen) | |
6491 | { | |
495aee44 CR |
6492 | strncpy (ret + rptr, rstr, rslen); |
6493 | rptr += rslen; | |
ccc6cda3 JA |
6494 | } |
6495 | str = e; /* e == end of match */ | |
b80f6443 | 6496 | |
495aee44 CR |
6497 | if (rstr != rep) |
6498 | free (rstr); | |
6499 | ||
ccc6cda3 | 6500 | if (((mflags & MATCH_GLOBREP) == 0) || mtype != MATCH_ANY) |
28ef6c31 | 6501 | break; |
b80f6443 JA |
6502 | |
6503 | if (s == e) | |
0001803f CR |
6504 | { |
6505 | /* On a zero-length match, make sure we copy one character, since | |
6506 | we increment one character to avoid infinite recursion. */ | |
6507 | RESIZE_MALLOCED_BUFFER (ret, rptr, 1, rsize, 64); | |
6508 | ret[rptr++] = *str++; | |
6509 | e++; /* avoid infinite recursion on zero-length match */ | |
6510 | } | |
ccc6cda3 JA |
6511 | } |
6512 | ||
6513 | /* Now copy the unmatched portion of the input string */ | |
495aee44 | 6514 | if (str && *str) |
d166f048 JA |
6515 | { |
6516 | RESIZE_MALLOCED_BUFFER (ret, rptr, STRLEN(str) + 1, rsize, 64); | |
6517 | strcpy (ret + rptr, str); | |
6518 | } | |
ccc6cda3 JA |
6519 | else |
6520 | ret[rptr] = '\0'; | |
6521 | ||
6522 | return ret; | |
6523 | } | |
6524 | ||
6525 | /* Do pattern match and replacement on the positional parameters. */ | |
6526 | static char * | |
6527 | pos_params_pat_subst (string, pat, rep, mflags) | |
6528 | char *string, *pat, *rep; | |
6529 | int mflags; | |
6530 | { | |
6531 | WORD_LIST *save, *params; | |
6532 | WORD_DESC *w; | |
0628567a | 6533 | char *ret; |
3185942a | 6534 | int pchar, qflags; |
ccc6cda3 JA |
6535 | |
6536 | save = params = list_rest_of_args (); | |
6537 | if (save == 0) | |
6538 | return ((char *)NULL); | |
6539 | ||
6540 | for ( ; params; params = params->next) | |
6541 | { | |
6542 | ret = pat_subst (params->word->word, pat, rep, mflags); | |
95732b49 JA |
6543 | w = alloc_word_desc (); |
6544 | w->word = ret ? ret : savestring (""); | |
ccc6cda3 JA |
6545 | dispose_word (params->word); |
6546 | params->word = w; | |
ccc6cda3 JA |
6547 | } |
6548 | ||
3185942a JA |
6549 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; |
6550 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6551 | ||
6552 | #if 0 | |
b80f6443 JA |
6553 | if ((mflags & (MATCH_QUOTED|MATCH_STARSUB)) == (MATCH_QUOTED|MATCH_STARSUB)) |
6554 | ret = string_list_dollar_star (quote_list (save)); | |
3185942a JA |
6555 | else if ((mflags & MATCH_STARSUB) == MATCH_STARSUB) |
6556 | ret = string_list_dollar_star (save); | |
6557 | else if ((mflags & MATCH_QUOTED) == MATCH_QUOTED) | |
6558 | ret = string_list_dollar_at (save, qflags); | |
b80f6443 | 6559 | else |
3185942a JA |
6560 | ret = string_list_dollar_star (save); |
6561 | #else | |
6562 | ret = string_list_pos_params (pchar, save, qflags); | |
6563 | #endif | |
6564 | ||
ccc6cda3 JA |
6565 | dispose_words (save); |
6566 | ||
6567 | return (ret); | |
6568 | } | |
6569 | ||
cce855bc JA |
6570 | /* Perform pattern substitution on VALUE, which is the expansion of |
6571 | VARNAME. PATSUB is an expression supplying the pattern to match | |
6572 | and the string to substitute. QUOTED is a flags word containing | |
6573 | the type of quoting currently in effect. */ | |
ccc6cda3 | 6574 | static char * |
495aee44 CR |
6575 | parameter_brace_patsub (varname, value, ind, patsub, quoted, flags) |
6576 | char *varname, *value; | |
6577 | int ind; | |
6578 | char *patsub; | |
6579 | int quoted, flags; | |
ccc6cda3 | 6580 | { |
3185942a | 6581 | int vtype, mflags, starsub, delim; |
7117c2d2 | 6582 | char *val, *temp, *pat, *rep, *p, *lpatsub, *tt; |
ccc6cda3 JA |
6583 | SHELL_VAR *v; |
6584 | ||
6585 | if (value == 0) | |
6586 | return ((char *)NULL); | |
6587 | ||
6588 | this_command_name = varname; | |
6589 | ||
495aee44 | 6590 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
ccc6cda3 JA |
6591 | if (vtype == -1) |
6592 | return ((char *)NULL); | |
6593 | ||
b80f6443 JA |
6594 | starsub = vtype & VT_STARSUB; |
6595 | vtype &= ~VT_STARSUB; | |
6596 | ||
ccc6cda3 | 6597 | mflags = 0; |
f1be666c JA |
6598 | if (patsub && *patsub == '/') |
6599 | { | |
6600 | mflags |= MATCH_GLOBREP; | |
6601 | patsub++; | |
6602 | } | |
7117c2d2 JA |
6603 | |
6604 | /* Malloc this because expand_string_if_necessary or one of the expansion | |
6605 | functions in its call chain may free it on a substitution error. */ | |
bb70624e | 6606 | lpatsub = savestring (patsub); |
ccc6cda3 JA |
6607 | |
6608 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6609 | mflags |= MATCH_QUOTED; | |
6610 | ||
b80f6443 JA |
6611 | if (starsub) |
6612 | mflags |= MATCH_STARSUB; | |
6613 | ||
0628567a JA |
6614 | /* If the pattern starts with a `/', make sure we skip over it when looking |
6615 | for the replacement delimiter. */ | |
3185942a | 6616 | #if 0 |
0628567a | 6617 | if (rep = quoted_strchr ((*patsub == '/') ? lpatsub+1 : lpatsub, '/', ST_BACKSL)) |
ccc6cda3 JA |
6618 | *rep++ = '\0'; |
6619 | else | |
6620 | rep = (char *)NULL; | |
3185942a JA |
6621 | #else |
6622 | delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0); | |
6623 | if (lpatsub[delim] == '/') | |
6624 | { | |
6625 | lpatsub[delim] = 0; | |
6626 | rep = lpatsub + delim + 1; | |
6627 | } | |
6628 | else | |
6629 | rep = (char *)NULL; | |
6630 | #endif | |
ccc6cda3 JA |
6631 | |
6632 | if (rep && *rep == '\0') | |
6633 | rep = (char *)NULL; | |
6634 | ||
b80f6443 JA |
6635 | /* Perform the same expansions on the pattern as performed by the |
6636 | pattern removal expansions. */ | |
6637 | pat = getpattern (lpatsub, quoted, 1); | |
bb70624e | 6638 | |
ccc6cda3 | 6639 | if (rep) |
d166f048 JA |
6640 | { |
6641 | if ((mflags & MATCH_QUOTED) == 0) | |
f73dda09 | 6642 | rep = expand_string_if_necessary (rep, quoted, expand_string_unsplit); |
d166f048 | 6643 | else |
f73dda09 | 6644 | rep = expand_string_to_string_internal (rep, quoted, expand_string_unsplit); |
d166f048 | 6645 | } |
ccc6cda3 | 6646 | |
0628567a | 6647 | /* ksh93 doesn't allow the match specifier to be a part of the expanded |
f1be666c JA |
6648 | pattern. This is an extension. Make sure we don't anchor the pattern |
6649 | at the beginning or end of the string if we're doing global replacement, | |
6650 | though. */ | |
ccc6cda3 | 6651 | p = pat; |
f1be666c JA |
6652 | if (mflags & MATCH_GLOBREP) |
6653 | mflags |= MATCH_ANY; | |
0628567a | 6654 | else if (pat && pat[0] == '#') |
ccc6cda3 JA |
6655 | { |
6656 | mflags |= MATCH_BEG; | |
6657 | p++; | |
6658 | } | |
d166f048 | 6659 | else if (pat && pat[0] == '%') |
ccc6cda3 JA |
6660 | { |
6661 | mflags |= MATCH_END; | |
6662 | p++; | |
6663 | } | |
6664 | else | |
6665 | mflags |= MATCH_ANY; | |
6666 | ||
cce855bc JA |
6667 | /* OK, we now want to substitute REP for PAT in VAL. If |
6668 | flags & MATCH_GLOBREP is non-zero, the substitution is done | |
6669 | everywhere, otherwise only the first occurrence of PAT is | |
7117c2d2 JA |
6670 | replaced. The pattern matching code doesn't understand |
6671 | CTLESC quoting CTLESC and CTLNUL so we use the dequoted variable | |
6672 | values passed in (VT_VARIABLE) so the pattern substitution | |
6673 | code works right. We need to requote special chars after | |
6674 | we're done for VT_VARIABLE and VT_ARRAYMEMBER, and for the | |
6675 | other cases if QUOTED == 0, since the posparams and arrays | |
6676 | indexed by * or @ do special things when QUOTED != 0. */ | |
6677 | ||
ccc6cda3 JA |
6678 | switch (vtype) |
6679 | { | |
6680 | case VT_VARIABLE: | |
d166f048 | 6681 | case VT_ARRAYMEMBER: |
ccc6cda3 | 6682 | temp = pat_subst (val, p, rep, mflags); |
7117c2d2 JA |
6683 | if (vtype == VT_VARIABLE) |
6684 | FREE (val); | |
6685 | if (temp) | |
6686 | { | |
3185942a | 6687 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); |
7117c2d2 JA |
6688 | free (temp); |
6689 | temp = tt; | |
6690 | } | |
ccc6cda3 JA |
6691 | break; |
6692 | case VT_POSPARMS: | |
6693 | temp = pos_params_pat_subst (val, p, rep, mflags); | |
7117c2d2 JA |
6694 | if (temp && (mflags & MATCH_QUOTED) == 0) |
6695 | { | |
6696 | tt = quote_escapes (temp); | |
6697 | free (temp); | |
6698 | temp = tt; | |
6699 | } | |
ccc6cda3 JA |
6700 | break; |
6701 | #if defined (ARRAY_VARS) | |
6702 | case VT_ARRAYVAR: | |
3185942a JA |
6703 | temp = assoc_p (v) ? assoc_patsub (assoc_cell (v), p, rep, mflags) |
6704 | : array_patsub (array_cell (v), p, rep, mflags); | |
6705 | /* Don't call quote_escapes anymore; array_patsub calls | |
6706 | array_quote_escapes as appropriate before adding the | |
6707 | space separators; ditto for assoc_patsub. */ | |
6708 | break; | |
6709 | #endif | |
6710 | } | |
6711 | ||
6712 | FREE (pat); | |
6713 | FREE (rep); | |
6714 | free (lpatsub); | |
6715 | ||
6716 | return temp; | |
6717 | } | |
6718 | ||
6719 | /****************************************************************/ | |
6720 | /* */ | |
6721 | /* Functions to perform case modification on variable values */ | |
6722 | /* */ | |
6723 | /****************************************************************/ | |
6724 | ||
6725 | /* Do case modification on the positional parameters. */ | |
6726 | ||
6727 | static char * | |
6728 | pos_params_modcase (string, pat, modop, mflags) | |
6729 | char *string, *pat; | |
6730 | int modop; | |
6731 | int mflags; | |
6732 | { | |
6733 | WORD_LIST *save, *params; | |
6734 | WORD_DESC *w; | |
6735 | char *ret; | |
6736 | int pchar, qflags; | |
6737 | ||
6738 | save = params = list_rest_of_args (); | |
6739 | if (save == 0) | |
6740 | return ((char *)NULL); | |
6741 | ||
6742 | for ( ; params; params = params->next) | |
6743 | { | |
6744 | ret = sh_modcase (params->word->word, pat, modop); | |
6745 | w = alloc_word_desc (); | |
6746 | w->word = ret ? ret : savestring (""); | |
6747 | dispose_word (params->word); | |
6748 | params->word = w; | |
6749 | } | |
6750 | ||
6751 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; | |
6752 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6753 | ||
6754 | ret = string_list_pos_params (pchar, save, qflags); | |
6755 | dispose_words (save); | |
6756 | ||
6757 | return (ret); | |
6758 | } | |
6759 | ||
6760 | /* Perform case modification on VALUE, which is the expansion of | |
6761 | VARNAME. MODSPEC is an expression supplying the type of modification | |
6762 | to perform. QUOTED is a flags word containing the type of quoting | |
6763 | currently in effect. */ | |
6764 | static char * | |
495aee44 | 6765 | parameter_brace_casemod (varname, value, ind, modspec, patspec, quoted, flags) |
3185942a | 6766 | char *varname, *value; |
495aee44 | 6767 | int ind, modspec; |
3185942a | 6768 | char *patspec; |
495aee44 | 6769 | int quoted, flags; |
3185942a JA |
6770 | { |
6771 | int vtype, starsub, modop, mflags, x; | |
6772 | char *val, *temp, *pat, *p, *lpat, *tt; | |
6773 | SHELL_VAR *v; | |
6774 | ||
6775 | if (value == 0) | |
6776 | return ((char *)NULL); | |
6777 | ||
6778 | this_command_name = varname; | |
6779 | ||
495aee44 | 6780 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
3185942a JA |
6781 | if (vtype == -1) |
6782 | return ((char *)NULL); | |
6783 | ||
6784 | starsub = vtype & VT_STARSUB; | |
6785 | vtype &= ~VT_STARSUB; | |
6786 | ||
6787 | modop = 0; | |
6788 | mflags = 0; | |
6789 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6790 | mflags |= MATCH_QUOTED; | |
6791 | if (starsub) | |
6792 | mflags |= MATCH_STARSUB; | |
6793 | ||
6794 | p = patspec; | |
6795 | if (modspec == '^') | |
6796 | { | |
6797 | x = p && p[0] == modspec; | |
17345e5a | 6798 | modop = x ? CASE_UPPER : CASE_UPFIRST; |
3185942a JA |
6799 | p += x; |
6800 | } | |
6801 | else if (modspec == ',') | |
6802 | { | |
6803 | x = p && p[0] == modspec; | |
17345e5a | 6804 | modop = x ? CASE_LOWER : CASE_LOWFIRST; |
3185942a JA |
6805 | p += x; |
6806 | } | |
6807 | else if (modspec == '~') | |
6808 | { | |
6809 | x = p && p[0] == modspec; | |
6810 | modop = x ? CASE_TOGGLEALL : CASE_TOGGLE; | |
6811 | p += x; | |
6812 | } | |
6813 | ||
6814 | lpat = p ? savestring (p) : 0; | |
6815 | /* Perform the same expansions on the pattern as performed by the | |
6816 | pattern removal expansions. FOR LATER */ | |
6817 | pat = lpat ? getpattern (lpat, quoted, 1) : 0; | |
6818 | ||
6819 | /* OK, now we do the case modification. */ | |
6820 | switch (vtype) | |
6821 | { | |
6822 | case VT_VARIABLE: | |
6823 | case VT_ARRAYMEMBER: | |
6824 | temp = sh_modcase (val, pat, modop); | |
6825 | if (vtype == VT_VARIABLE) | |
6826 | FREE (val); | |
6827 | if (temp) | |
6828 | { | |
6829 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); | |
6830 | free (temp); | |
6831 | temp = tt; | |
6832 | } | |
6833 | break; | |
6834 | ||
6835 | case VT_POSPARMS: | |
6836 | temp = pos_params_modcase (val, pat, modop, mflags); | |
6837 | if (temp && (mflags & MATCH_QUOTED) == 0) | |
7117c2d2 JA |
6838 | { |
6839 | tt = quote_escapes (temp); | |
6840 | free (temp); | |
6841 | temp = tt; | |
6842 | } | |
3185942a JA |
6843 | break; |
6844 | ||
6845 | #if defined (ARRAY_VARS) | |
6846 | case VT_ARRAYVAR: | |
6847 | temp = assoc_p (v) ? assoc_modcase (assoc_cell (v), pat, modop, mflags) | |
6848 | : array_modcase (array_cell (v), pat, modop, mflags); | |
6849 | /* Don't call quote_escapes; array_modcase calls array_quote_escapes | |
6850 | as appropriate before adding the space separators; ditto for | |
6851 | assoc_modcase. */ | |
ccc6cda3 JA |
6852 | break; |
6853 | #endif | |
6854 | } | |
6855 | ||
6856 | FREE (pat); | |
3185942a | 6857 | free (lpat); |
ccc6cda3 JA |
6858 | |
6859 | return temp; | |
6860 | } | |
6861 | ||
0628567a JA |
6862 | /* Check for unbalanced parens in S, which is the contents of $(( ... )). If |
6863 | any occur, this must be a nested command substitution, so return 0. | |
6864 | Otherwise, return 1. A valid arithmetic expression must always have a | |
6865 | ( before a matching ), so any cases where there are more right parens | |
6866 | means that this must not be an arithmetic expression, though the parser | |
6867 | will not accept it without a balanced total number of parens. */ | |
6868 | static int | |
6869 | chk_arithsub (s, len) | |
6870 | const char *s; | |
6871 | int len; | |
6872 | { | |
6873 | int i, count; | |
6874 | DECLARE_MBSTATE; | |
6875 | ||
6876 | i = count = 0; | |
6877 | while (i < len) | |
6878 | { | |
0001803f | 6879 | if (s[i] == LPAREN) |
0628567a | 6880 | count++; |
0001803f | 6881 | else if (s[i] == RPAREN) |
0628567a JA |
6882 | { |
6883 | count--; | |
6884 | if (count < 0) | |
6885 | return 0; | |
6886 | } | |
6887 | ||
6888 | switch (s[i]) | |
6889 | { | |
6890 | default: | |
6891 | ADVANCE_CHAR (s, len, i); | |
6892 | break; | |
6893 | ||
6894 | case '\\': | |
6895 | i++; | |
6896 | if (s[i]) | |
6897 | ADVANCE_CHAR (s, len, i); | |
6898 | break; | |
6899 | ||
6900 | case '\'': | |
6901 | i = skip_single_quoted (s, len, ++i); | |
6902 | break; | |
6903 | ||
6904 | case '"': | |
6905 | i = skip_double_quoted ((char *)s, len, ++i); | |
6906 | break; | |
6907 | } | |
6908 | } | |
6909 | ||
6910 | return (count == 0); | |
6911 | } | |
6912 | ||
cce855bc JA |
6913 | /****************************************************************/ |
6914 | /* */ | |
6915 | /* Functions to perform parameter expansion on a string */ | |
6916 | /* */ | |
6917 | /****************************************************************/ | |
6918 | ||
3185942a | 6919 | /* ${[#][!]name[[:][^[^]][,[,]]#[#]%[%]-=?+[word][:e1[:e2]]]} */ |
95732b49 | 6920 | static WORD_DESC * |
0001803f | 6921 | parameter_brace_expand (string, indexp, quoted, pflags, quoted_dollar_atp, contains_dollar_at) |
ccc6cda3 | 6922 | char *string; |
0001803f | 6923 | int *indexp, quoted, *quoted_dollar_atp, *contains_dollar_at, pflags; |
ccc6cda3 JA |
6924 | { |
6925 | int check_nullness, var_is_set, var_is_null, var_is_special; | |
3185942a | 6926 | int want_substring, want_indir, want_patsub, want_casemod; |
ccc6cda3 | 6927 | char *name, *value, *temp, *temp1; |
95732b49 | 6928 | WORD_DESC *tdesc, *ret; |
3185942a | 6929 | int t_index, sindex, c, tflag, modspec; |
7117c2d2 | 6930 | intmax_t number; |
495aee44 | 6931 | arrayind_t ind; |
ccc6cda3 | 6932 | |
3185942a | 6933 | temp = temp1 = value = (char *)NULL; |
ccc6cda3 | 6934 | var_is_set = var_is_null = var_is_special = check_nullness = 0; |
3185942a | 6935 | want_substring = want_indir = want_patsub = want_casemod = 0; |
ccc6cda3 | 6936 | |
cce855bc JA |
6937 | sindex = *indexp; |
6938 | t_index = ++sindex; | |
0628567a JA |
6939 | /* ${#var} doesn't have any of the other parameter expansions on it. */ |
6940 | if (string[t_index] == '#' && legal_variable_starter (string[t_index+1])) /* {{ */ | |
3185942a | 6941 | name = string_extract (string, &t_index, "}", SX_VARNAME); |
0628567a | 6942 | else |
3185942a JA |
6943 | #if defined (CASEMOD_EXPANSIONS) |
6944 | /* To enable case-toggling expansions using the `~' operator character | |
6945 | change the 1 to 0. */ | |
6946 | # if defined (CASEMOD_CAPCASE) | |
6947 | name = string_extract (string, &t_index, "#%^,~:-=?+/}", SX_VARNAME); | |
6948 | # else | |
6949 | name = string_extract (string, &t_index, "#%^,:-=?+/}", SX_VARNAME); | |
6950 | # endif /* CASEMOD_CAPCASE */ | |
6951 | #else | |
6952 | name = string_extract (string, &t_index, "#%:-=?+/}", SX_VARNAME); | |
6953 | #endif /* CASEMOD_EXPANSIONS */ | |
cce855bc | 6954 | |
95732b49 JA |
6955 | ret = 0; |
6956 | tflag = 0; | |
6957 | ||
495aee44 CR |
6958 | ind = INTMAX_MIN; |
6959 | ||
cce855bc JA |
6960 | /* If the name really consists of a special variable, then make sure |
6961 | that we have the entire name. We don't allow indirect references | |
6962 | to special variables except `#', `?', `@' and `*'. */ | |
495aee44 CR |
6963 | if ((sindex == t_index && VALID_SPECIAL_LENGTH_PARAM (string[t_index])) || |
6964 | (sindex == t_index - 1 && string[sindex] == '!' && VALID_INDIR_PARAM (string[t_index]))) | |
ccc6cda3 JA |
6965 | { |
6966 | t_index++; | |
6967 | free (name); | |
6968 | temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0); | |
f73dda09 | 6969 | name = (char *)xmalloc (3 + (strlen (temp1))); |
ccc6cda3 JA |
6970 | *name = string[sindex]; |
6971 | if (string[sindex] == '!') | |
6972 | { | |
28ef6c31 JA |
6973 | /* indirect reference of $#, $?, $@, or $* */ |
6974 | name[1] = string[sindex + 1]; | |
6975 | strcpy (name + 2, temp1); | |
ccc6cda3 | 6976 | } |
cce855bc | 6977 | else |
ccc6cda3 JA |
6978 | strcpy (name + 1, temp1); |
6979 | free (temp1); | |
6980 | } | |
6981 | sindex = t_index; | |
6982 | ||
6983 | /* Find out what character ended the variable name. Then | |
6984 | do the appropriate thing. */ | |
6985 | if (c = string[sindex]) | |
6986 | sindex++; | |
6987 | ||
6988 | /* If c is followed by one of the valid parameter expansion | |
6989 | characters, move past it as normal. If not, assume that | |
6990 | a substring specification is being given, and do not move | |
6991 | past it. */ | |
28ef6c31 | 6992 | if (c == ':' && VALID_PARAM_EXPAND_CHAR (string[sindex])) |
ccc6cda3 JA |
6993 | { |
6994 | check_nullness++; | |
6995 | if (c = string[sindex]) | |
6996 | sindex++; | |
6997 | } | |
cce855bc | 6998 | else if (c == ':' && string[sindex] != RBRACE) |
ccc6cda3 | 6999 | want_substring = 1; |
cce855bc | 7000 | else if (c == '/' && string[sindex] != RBRACE) |
ccc6cda3 | 7001 | want_patsub = 1; |
3185942a JA |
7002 | #if defined (CASEMOD_EXPANSIONS) |
7003 | else if (c == '^' || c == ',' || c == '~') | |
7004 | { | |
7005 | modspec = c; | |
7006 | want_casemod = 1; | |
7007 | } | |
7008 | #endif | |
ccc6cda3 | 7009 | |
cce855bc JA |
7010 | /* Catch the valid and invalid brace expressions that made it through the |
7011 | tests above. */ | |
7012 | /* ${#-} is a valid expansion and means to take the length of $-. | |
7013 | Similarly for ${#?} and ${##}... */ | |
7014 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
28ef6c31 | 7015 | VALID_SPECIAL_LENGTH_PARAM (c) && string[sindex] == RBRACE) |
cce855bc | 7016 | { |
f73dda09 | 7017 | name = (char *)xrealloc (name, 3); |
cce855bc JA |
7018 | name[1] = c; |
7019 | name[2] = '\0'; | |
7020 | c = string[sindex++]; | |
7021 | } | |
7022 | ||
7023 | /* ...but ${#%}, ${#:}, ${#=}, ${#+}, and ${#/} are errors. */ | |
7024 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
7025 | member (c, "%:=+/") && string[sindex] == RBRACE) | |
7026 | { | |
7027 | temp = (char *)NULL; | |
7028 | goto bad_substitution; | |
7029 | } | |
7030 | ||
7031 | /* Indirect expansion begins with a `!'. A valid indirect expansion is | |
7032 | either a variable name, one of the positional parameters or a special | |
7033 | variable that expands to one of the positional parameters. */ | |
7034 | want_indir = *name == '!' && | |
f73dda09 | 7035 | (legal_variable_starter ((unsigned char)name[1]) || DIGIT (name[1]) |
7117c2d2 | 7036 | || VALID_INDIR_PARAM (name[1])); |
ccc6cda3 JA |
7037 | |
7038 | /* Determine the value of this variable. */ | |
7039 | ||
cce855bc | 7040 | /* Check for special variables, directly referenced. */ |
bb70624e | 7041 | if (SPECIAL_VAR (name, want_indir)) |
ccc6cda3 JA |
7042 | var_is_special++; |
7043 | ||
cce855bc JA |
7044 | /* Check for special expansion things, like the length of a parameter */ |
7045 | if (*name == '#' && name[1]) | |
ccc6cda3 | 7046 | { |
cce855bc | 7047 | /* If we are not pointing at the character just after the |
28ef6c31 JA |
7048 | closing brace, then we haven't gotten all of the name. |
7049 | Since it begins with a special character, this is a bad | |
7050 | substitution. Also check NAME for validity before trying | |
7051 | to go on. */ | |
cce855bc | 7052 | if (string[sindex - 1] != RBRACE || (valid_length_expression (name) == 0)) |
ccc6cda3 JA |
7053 | { |
7054 | temp = (char *)NULL; | |
7055 | goto bad_substitution; | |
7056 | } | |
7057 | ||
7058 | number = parameter_brace_expand_length (name); | |
495aee44 CR |
7059 | if (number == INTMAX_MIN && unbound_vars_is_error) |
7060 | { | |
7061 | last_command_exit_value = EXECUTION_FAILURE; | |
7062 | err_unboundvar (name+1); | |
7063 | free (name); | |
7064 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7065 | } | |
ccc6cda3 JA |
7066 | free (name); |
7067 | ||
7068 | *indexp = sindex; | |
95732b49 JA |
7069 | if (number < 0) |
7070 | return (&expand_wdesc_error); | |
7071 | else | |
7072 | { | |
7073 | ret = alloc_word_desc (); | |
7074 | ret->word = itos (number); | |
7075 | return ret; | |
7076 | } | |
ccc6cda3 JA |
7077 | } |
7078 | ||
7079 | /* ${@} is identical to $@. */ | |
7080 | if (name[0] == '@' && name[1] == '\0') | |
7081 | { | |
7082 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7083 | *quoted_dollar_atp = 1; | |
7084 | ||
7085 | if (contains_dollar_at) | |
7086 | *contains_dollar_at = 1; | |
7087 | } | |
7088 | ||
b80f6443 | 7089 | /* Process ${!PREFIX*} expansion. */ |
bb70624e JA |
7090 | if (want_indir && string[sindex - 1] == RBRACE && |
7091 | (string[sindex - 2] == '*' || string[sindex - 2] == '@') && | |
f73dda09 | 7092 | legal_variable_starter ((unsigned char) name[1])) |
bb70624e JA |
7093 | { |
7094 | char **x; | |
7095 | WORD_LIST *xlist; | |
7096 | ||
7097 | temp1 = savestring (name + 1); | |
7098 | number = strlen (temp1); | |
7099 | temp1[number - 1] = '\0'; | |
7100 | x = all_variables_matching_prefix (temp1); | |
7117c2d2 | 7101 | xlist = strvec_to_word_list (x, 0, 0); |
28ef6c31 JA |
7102 | if (string[sindex - 2] == '*') |
7103 | temp = string_list_dollar_star (xlist); | |
7104 | else | |
7105 | { | |
7106 | temp = string_list_dollar_at (xlist, quoted); | |
7107 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7108 | *quoted_dollar_atp = 1; | |
7109 | if (contains_dollar_at) | |
7110 | *contains_dollar_at = 1; | |
7111 | } | |
bb70624e | 7112 | free (x); |
89a92869 | 7113 | dispose_words (xlist); |
bb70624e JA |
7114 | free (temp1); |
7115 | *indexp = sindex; | |
95732b49 JA |
7116 | |
7117 | ret = alloc_word_desc (); | |
7118 | ret->word = temp; | |
7119 | return ret; | |
bb70624e | 7120 | } |
b80f6443 JA |
7121 | |
7122 | #if defined (ARRAY_VARS) | |
7123 | /* Process ${!ARRAY[@]} and ${!ARRAY[*]} expansion. */ /* [ */ | |
7124 | if (want_indir && string[sindex - 1] == RBRACE && | |
7125 | string[sindex - 2] == ']' && valid_array_reference (name+1)) | |
7126 | { | |
7127 | char *x, *x1; | |
7128 | ||
7129 | temp1 = savestring (name + 1); | |
7130 | x = array_variable_name (temp1, &x1, (int *)0); /* [ */ | |
7131 | FREE (x); | |
7132 | if (ALL_ELEMENT_SUB (x1[0]) && x1[1] == ']') | |
7133 | { | |
3185942a | 7134 | temp = array_keys (temp1, quoted); /* handles assoc vars too */ |
b80f6443 JA |
7135 | if (x1[0] == '@') |
7136 | { | |
7137 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7138 | *quoted_dollar_atp = 1; | |
7139 | if (contains_dollar_at) | |
7140 | *contains_dollar_at = 1; | |
7141 | } | |
7142 | ||
7143 | free (temp1); | |
7144 | *indexp = sindex; | |
95732b49 JA |
7145 | |
7146 | ret = alloc_word_desc (); | |
7147 | ret->word = temp; | |
7148 | return ret; | |
b80f6443 JA |
7149 | } |
7150 | ||
7151 | free (temp1); | |
7152 | } | |
7153 | #endif /* ARRAY_VARS */ | |
bb70624e | 7154 | |
ccc6cda3 JA |
7155 | /* Make sure that NAME is valid before trying to go on. */ |
7156 | if (valid_brace_expansion_word (want_indir ? name + 1 : name, | |
7157 | var_is_special) == 0) | |
7158 | { | |
7159 | temp = (char *)NULL; | |
7160 | goto bad_substitution; | |
7161 | } | |
7162 | ||
7163 | if (want_indir) | |
95732b49 JA |
7164 | tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at); |
7165 | else | |
495aee44 | 7166 | tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&PF_NOSPLIT2), &ind); |
95732b49 JA |
7167 | |
7168 | if (tdesc) | |
7169 | { | |
7170 | temp = tdesc->word; | |
7171 | tflag = tdesc->flags; | |
7172 | dispose_word_desc (tdesc); | |
7173 | } | |
ccc6cda3 | 7174 | else |
95732b49 | 7175 | temp = (char *)0; |
ccc6cda3 JA |
7176 | |
7177 | #if defined (ARRAY_VARS) | |
cce855bc | 7178 | if (valid_array_reference (name)) |
b80f6443 | 7179 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 JA |
7180 | #endif |
7181 | ||
7182 | var_is_set = temp != (char *)0; | |
7183 | var_is_null = check_nullness && (var_is_set == 0 || *temp == 0); | |
7184 | ||
7185 | /* Get the rest of the stuff inside the braces. */ | |
cce855bc | 7186 | if (c && c != RBRACE) |
ccc6cda3 JA |
7187 | { |
7188 | /* Extract the contents of the ${ ... } expansion | |
28ef6c31 | 7189 | according to the Posix.2 rules. */ |
49ed961b | 7190 | value = extract_dollar_brace_string (string, &sindex, quoted, (c == '%' || c == '#' || c =='/' || c == '^' || c == ',' || c ==':') ? SX_POSIXEXP|SX_WORD : SX_WORD); |
cce855bc | 7191 | if (string[sindex] == RBRACE) |
28ef6c31 | 7192 | sindex++; |
ccc6cda3 JA |
7193 | else |
7194 | goto bad_substitution; | |
7195 | } | |
7196 | else | |
7197 | value = (char *)NULL; | |
726f6388 | 7198 | |
ccc6cda3 JA |
7199 | *indexp = sindex; |
7200 | ||
495aee44 CR |
7201 | /* All the cases where an expansion can possibly generate an unbound |
7202 | variable error. */ | |
7203 | if (want_substring || want_patsub || want_casemod || c == '#' || c == '%' || c == RBRACE) | |
7204 | { | |
7205 | if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1])) | |
7206 | { | |
7207 | last_command_exit_value = EXECUTION_FAILURE; | |
7208 | err_unboundvar (name); | |
7209 | FREE (value); | |
7210 | FREE (temp); | |
7211 | free (name); | |
7212 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7213 | } | |
7214 | } | |
7215 | ||
ccc6cda3 JA |
7216 | /* If this is a substring spec, process it and add the result. */ |
7217 | if (want_substring) | |
726f6388 | 7218 | { |
495aee44 | 7219 | temp1 = parameter_brace_substring (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7220 | FREE (name); |
7221 | FREE (value); | |
7222 | FREE (temp); | |
95732b49 JA |
7223 | |
7224 | if (temp1 == &expand_param_error) | |
7225 | return (&expand_wdesc_error); | |
7226 | else if (temp1 == &expand_param_fatal) | |
7227 | return (&expand_wdesc_fatal); | |
7228 | ||
7229 | ret = alloc_word_desc (); | |
7230 | ret->word = temp1; | |
0628567a JA |
7231 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7232 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
95732b49 | 7233 | return ret; |
726f6388 | 7234 | } |
ccc6cda3 | 7235 | else if (want_patsub) |
726f6388 | 7236 | { |
495aee44 | 7237 | temp1 = parameter_brace_patsub (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7238 | FREE (name); |
7239 | FREE (value); | |
7240 | FREE (temp); | |
95732b49 JA |
7241 | |
7242 | if (temp1 == &expand_param_error) | |
7243 | return (&expand_wdesc_error); | |
7244 | else if (temp1 == &expand_param_fatal) | |
7245 | return (&expand_wdesc_fatal); | |
7246 | ||
7247 | ret = alloc_word_desc (); | |
7248 | ret->word = temp1; | |
3185942a JA |
7249 | ret = alloc_word_desc (); |
7250 | ret->word = temp1; | |
7251 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7252 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
95732b49 | 7253 | return ret; |
ccc6cda3 | 7254 | } |
3185942a JA |
7255 | #if defined (CASEMOD_EXPANSIONS) |
7256 | else if (want_casemod) | |
7257 | { | |
495aee44 | 7258 | temp1 = parameter_brace_casemod (name, temp, ind, modspec, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
3185942a JA |
7259 | FREE (name); |
7260 | FREE (value); | |
7261 | FREE (temp); | |
7262 | ||
7263 | if (temp1 == &expand_param_error) | |
7264 | return (&expand_wdesc_error); | |
7265 | else if (temp1 == &expand_param_fatal) | |
7266 | return (&expand_wdesc_fatal); | |
7267 | ||
7268 | ret = alloc_word_desc (); | |
7269 | ret->word = temp1; | |
7270 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7271 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
7272 | return ret; | |
7273 | } | |
7274 | #endif | |
726f6388 | 7275 | |
ccc6cda3 JA |
7276 | /* Do the right thing based on which character ended the variable name. */ |
7277 | switch (c) | |
7278 | { | |
7279 | default: | |
7280 | case '\0': | |
7281 | bad_substitution: | |
f3fa14fc | 7282 | last_command_exit_value = EXECUTION_FAILURE; |
b80f6443 | 7283 | report_error (_("%s: bad substitution"), string ? string : "??"); |
ccc6cda3 JA |
7284 | FREE (value); |
7285 | FREE (temp); | |
7286 | free (name); | |
95732b49 | 7287 | return &expand_wdesc_error; |
ccc6cda3 | 7288 | |
cce855bc | 7289 | case RBRACE: |
ccc6cda3 | 7290 | break; |
726f6388 | 7291 | |
ccc6cda3 JA |
7292 | case '#': /* ${param#[#]pattern} */ |
7293 | case '%': /* ${param%[%]pattern} */ | |
7294 | if (value == 0 || *value == '\0' || temp == 0 || *temp == '\0') | |
28ef6c31 JA |
7295 | { |
7296 | FREE (value); | |
ccc6cda3 | 7297 | break; |
28ef6c31 | 7298 | } |
495aee44 | 7299 | temp1 = parameter_brace_remove_pattern (name, temp, ind, value, c, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7300 | free (temp); |
7301 | free (value); | |
495aee44 | 7302 | free (name); |
3185942a JA |
7303 | |
7304 | ret = alloc_word_desc (); | |
7305 | ret->word = temp1; | |
7306 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7307 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
7308 | return ret; | |
ccc6cda3 JA |
7309 | |
7310 | case '-': | |
7311 | case '=': | |
7312 | case '?': | |
7313 | case '+': | |
7314 | if (var_is_set && var_is_null == 0) | |
28ef6c31 JA |
7315 | { |
7316 | /* If the operator is `+', we don't want the value of the named | |
7317 | variable for anything, just the value of the right hand side. */ | |
ccc6cda3 JA |
7318 | if (c == '+') |
7319 | { | |
28ef6c31 JA |
7320 | /* XXX -- if we're double-quoted and the named variable is "$@", |
7321 | we want to turn off any special handling of "$@" -- | |
7322 | we're not using it, so whatever is on the rhs applies. */ | |
7323 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7324 | *quoted_dollar_atp = 0; | |
7325 | if (contains_dollar_at) | |
7326 | *contains_dollar_at = 0; | |
7327 | ||
ccc6cda3 JA |
7328 | FREE (temp); |
7329 | if (value) | |
28ef6c31 | 7330 | { |
495aee44 CR |
7331 | /* From Posix discussion on austin-group list. Issue 221 |
7332 | requires that backslashes escaping `}' inside | |
7333 | double-quoted ${...} be removed. */ | |
7334 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
7335 | quoted |= Q_DOLBRACE; | |
95732b49 JA |
7336 | ret = parameter_brace_expand_rhs (name, value, c, |
7337 | quoted, | |
7338 | quoted_dollar_atp, | |
7339 | contains_dollar_at); | |
7340 | /* XXX - fix up later, esp. noting presence of | |
7341 | W_HASQUOTEDNULL in ret->flags */ | |
ccc6cda3 JA |
7342 | free (value); |
7343 | } | |
7344 | else | |
28ef6c31 | 7345 | temp = (char *)NULL; |
ccc6cda3 JA |
7346 | } |
7347 | else | |
7348 | { | |
7349 | FREE (value); | |
7350 | } | |
7351 | /* Otherwise do nothing; just use the value in TEMP. */ | |
726f6388 | 7352 | } |
ccc6cda3 | 7353 | else /* VAR not set or VAR is NULL. */ |
28ef6c31 | 7354 | { |
ccc6cda3 JA |
7355 | FREE (temp); |
7356 | temp = (char *)NULL; | |
7357 | if (c == '=' && var_is_special) | |
7358 | { | |
b80f6443 | 7359 | report_error (_("$%s: cannot assign in this way"), name); |
ccc6cda3 JA |
7360 | free (name); |
7361 | free (value); | |
95732b49 | 7362 | return &expand_wdesc_error; |
ccc6cda3 JA |
7363 | } |
7364 | else if (c == '?') | |
7365 | { | |
7366 | parameter_brace_expand_error (name, value); | |
95732b49 | 7367 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
ccc6cda3 JA |
7368 | } |
7369 | else if (c != '+') | |
28ef6c31 JA |
7370 | { |
7371 | /* XXX -- if we're double-quoted and the named variable is "$@", | |
7372 | we want to turn off any special handling of "$@" -- | |
7373 | we're not using it, so whatever is on the rhs applies. */ | |
7374 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7375 | *quoted_dollar_atp = 0; | |
7376 | if (contains_dollar_at) | |
7377 | *contains_dollar_at = 0; | |
7378 | ||
495aee44 CR |
7379 | /* From Posix discussion on austin-group list. Issue 221 requires |
7380 | that backslashes escaping `}' inside double-quoted ${...} be | |
7381 | removed. */ | |
7382 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
7383 | quoted |= Q_DOLBRACE; | |
95732b49 JA |
7384 | ret = parameter_brace_expand_rhs (name, value, c, quoted, |
7385 | quoted_dollar_atp, | |
7386 | contains_dollar_at); | |
7387 | /* XXX - fix up later, esp. noting presence of | |
7388 | W_HASQUOTEDNULL in tdesc->flags */ | |
28ef6c31 | 7389 | } |
ccc6cda3 | 7390 | free (value); |
726f6388 | 7391 | } |
28ef6c31 | 7392 | |
ccc6cda3 | 7393 | break; |
726f6388 | 7394 | } |
ccc6cda3 | 7395 | free (name); |
95732b49 JA |
7396 | |
7397 | if (ret == 0) | |
7398 | { | |
7399 | ret = alloc_word_desc (); | |
7400 | ret->flags = tflag; | |
7401 | ret->word = temp; | |
7402 | } | |
7403 | return (ret); | |
726f6388 JA |
7404 | } |
7405 | ||
cce855bc JA |
7406 | /* Expand a single ${xxx} expansion. The braces are optional. When |
7407 | the braces are used, parameter_brace_expand() does the work, | |
7408 | possibly calling param_expand recursively. */ | |
95732b49 | 7409 | static WORD_DESC * |
cce855bc JA |
7410 | param_expand (string, sindex, quoted, expanded_something, |
7411 | contains_dollar_at, quoted_dollar_at_p, had_quoted_null_p, | |
7412 | pflags) | |
7413 | char *string; | |
7414 | int *sindex, quoted, *expanded_something, *contains_dollar_at; | |
7415 | int *quoted_dollar_at_p, *had_quoted_null_p, pflags; | |
7416 | { | |
7117c2d2 | 7417 | char *temp, *temp1, uerror[3]; |
f73dda09 JA |
7418 | int zindex, t_index, expok; |
7419 | unsigned char c; | |
7117c2d2 | 7420 | intmax_t number; |
cce855bc | 7421 | SHELL_VAR *var; |
f73dda09 | 7422 | WORD_LIST *list; |
95732b49 JA |
7423 | WORD_DESC *tdesc, *ret; |
7424 | int tflag; | |
cce855bc JA |
7425 | |
7426 | zindex = *sindex; | |
7427 | c = string[++zindex]; | |
7428 | ||
7429 | temp = (char *)NULL; | |
95732b49 JA |
7430 | ret = tdesc = (WORD_DESC *)NULL; |
7431 | tflag = 0; | |
cce855bc JA |
7432 | |
7433 | /* Do simple cases first. Switch on what follows '$'. */ | |
7434 | switch (c) | |
7435 | { | |
7436 | /* $0 .. $9? */ | |
7437 | case '0': | |
7438 | case '1': | |
7439 | case '2': | |
7440 | case '3': | |
7441 | case '4': | |
7442 | case '5': | |
7443 | case '6': | |
7444 | case '7': | |
7445 | case '8': | |
7446 | case '9': | |
f73dda09 | 7447 | temp1 = dollar_vars[TODIGIT (c)]; |
cce855bc JA |
7448 | if (unbound_vars_is_error && temp1 == (char *)NULL) |
7449 | { | |
7117c2d2 JA |
7450 | uerror[0] = '$'; |
7451 | uerror[1] = c; | |
7452 | uerror[2] = '\0'; | |
cce855bc | 7453 | last_command_exit_value = EXECUTION_FAILURE; |
0001803f | 7454 | err_unboundvar (uerror); |
95732b49 | 7455 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc | 7456 | } |
b80f6443 JA |
7457 | if (temp1) |
7458 | temp = (*temp1 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7459 | ? quote_string (temp1) | |
7460 | : quote_escapes (temp1); | |
7461 | else | |
7462 | temp = (char *)NULL; | |
95732b49 | 7463 | |
cce855bc JA |
7464 | break; |
7465 | ||
7466 | /* $$ -- pid of the invoking shell. */ | |
7467 | case '$': | |
7468 | temp = itos (dollar_dollar_pid); | |
7469 | break; | |
7470 | ||
7471 | /* $# -- number of positional parameters. */ | |
7472 | case '#': | |
7473 | temp = itos (number_of_args ()); | |
7474 | break; | |
7475 | ||
7476 | /* $? -- return value of the last synchronous command. */ | |
7477 | case '?': | |
7478 | temp = itos (last_command_exit_value); | |
7479 | break; | |
7480 | ||
7481 | /* $- -- flags supplied to the shell on invocation or by `set'. */ | |
7482 | case '-': | |
7483 | temp = which_set_flags (); | |
7484 | break; | |
7485 | ||
7486 | /* $! -- Pid of the last asynchronous command. */ | |
7487 | case '!': | |
7488 | /* If no asynchronous pids have been created, expand to nothing. | |
7489 | If `set -u' has been executed, and no async processes have | |
7490 | been created, this is an expansion error. */ | |
7491 | if (last_asynchronous_pid == NO_PID) | |
7492 | { | |
7493 | if (expanded_something) | |
7494 | *expanded_something = 0; | |
7495 | temp = (char *)NULL; | |
7496 | if (unbound_vars_is_error) | |
7497 | { | |
7117c2d2 JA |
7498 | uerror[0] = '$'; |
7499 | uerror[1] = c; | |
7500 | uerror[2] = '\0'; | |
cce855bc | 7501 | last_command_exit_value = EXECUTION_FAILURE; |
0001803f | 7502 | err_unboundvar (uerror); |
95732b49 | 7503 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc JA |
7504 | } |
7505 | } | |
7506 | else | |
f73dda09 | 7507 | temp = itos (last_asynchronous_pid); |
cce855bc JA |
7508 | break; |
7509 | ||
7510 | /* The only difference between this and $@ is when the arg is quoted. */ | |
7511 | case '*': /* `$*' */ | |
7512 | list = list_rest_of_args (); | |
7513 | ||
89a92869 CR |
7514 | #if 0 |
7515 | /* According to austin-group posix proposal by Geoff Clare in | |
7516 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7517 | ||
7518 | "The shell shall write a message to standard error and | |
7519 | immediately exit when it tries to expand an unset parameter | |
7520 | other than the '@' and '*' special parameters." | |
7521 | */ | |
7522 | ||
7523 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) | |
3185942a JA |
7524 | { |
7525 | uerror[0] = '$'; | |
7526 | uerror[1] = '*'; | |
7527 | uerror[2] = '\0'; | |
3185942a | 7528 | last_command_exit_value = EXECUTION_FAILURE; |
89a92869 | 7529 | err_unboundvar (uerror); |
3185942a JA |
7530 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7531 | } | |
89a92869 | 7532 | #endif |
3185942a | 7533 | |
cce855bc JA |
7534 | /* If there are no command-line arguments, this should just |
7535 | disappear if there are other characters in the expansion, | |
7536 | even if it's quoted. */ | |
7537 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && list == 0) | |
7538 | temp = (char *)NULL; | |
0001803f | 7539 | else if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
cce855bc JA |
7540 | { |
7541 | /* If we have "$*" we want to make a string of the positional | |
7542 | parameters, separated by the first character of $IFS, and | |
7543 | quote the whole string, including the separators. If IFS | |
7544 | is unset, the parameters are separated by ' '; if $IFS is | |
7545 | null, the parameters are concatenated. */ | |
0001803f | 7546 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_PATQUOTE)) ? string_list_dollar_star (list) : string_list (list); |
495aee44 CR |
7547 | if (temp) |
7548 | { | |
7549 | temp1 = quote_string (temp); | |
7550 | if (*temp == 0) | |
7551 | tflag |= W_HASQUOTEDNULL; | |
7552 | free (temp); | |
7553 | temp = temp1; | |
7554 | } | |
cce855bc JA |
7555 | } |
7556 | else | |
28ef6c31 | 7557 | { |
95732b49 JA |
7558 | /* We check whether or not we're eventually going to split $* here, |
7559 | for example when IFS is empty and we are processing the rhs of | |
7560 | an assignment statement. In that case, we don't separate the | |
7561 | arguments at all. Otherwise, if the $* is not quoted it is | |
7562 | identical to $@ */ | |
7563 | #if 1 | |
7564 | # if defined (HANDLE_MULTIBYTE) | |
7565 | if (expand_no_split_dollar_star && ifs_firstc[0] == 0) | |
7566 | # else | |
7567 | if (expand_no_split_dollar_star && ifs_firstc == 0) | |
7568 | # endif | |
7569 | temp = string_list_dollar_star (list); | |
7570 | else | |
7571 | temp = string_list_dollar_at (list, quoted); | |
7572 | #else | |
28ef6c31 | 7573 | temp = string_list_dollar_at (list, quoted); |
95732b49 | 7574 | #endif |
28ef6c31 JA |
7575 | if (expand_no_split_dollar_star == 0 && contains_dollar_at) |
7576 | *contains_dollar_at = 1; | |
7577 | } | |
cce855bc JA |
7578 | |
7579 | dispose_words (list); | |
7580 | break; | |
7581 | ||
7582 | /* When we have "$@" what we want is "$1" "$2" "$3" ... This | |
7583 | means that we have to turn quoting off after we split into | |
7584 | the individually quoted arguments so that the final split | |
7585 | on the first character of $IFS is still done. */ | |
7586 | case '@': /* `$@' */ | |
7587 | list = list_rest_of_args (); | |
7588 | ||
89a92869 CR |
7589 | #if 0 |
7590 | /* According to austin-group posix proposal by Geoff Clare in | |
7591 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7592 | ||
7593 | "The shell shall write a message to standard error and | |
7594 | immediately exit when it tries to expand an unset parameter | |
7595 | other than the '@' and '*' special parameters." | |
7596 | */ | |
7597 | ||
7598 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) | |
3185942a JA |
7599 | { |
7600 | uerror[0] = '$'; | |
7601 | uerror[1] = '@'; | |
7602 | uerror[2] = '\0'; | |
3185942a | 7603 | last_command_exit_value = EXECUTION_FAILURE; |
89a92869 | 7604 | err_unboundvar (uerror); |
3185942a JA |
7605 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7606 | } | |
89a92869 | 7607 | #endif |
3185942a | 7608 | |
cce855bc JA |
7609 | /* We want to flag the fact that we saw this. We can't turn |
7610 | off quoting entirely, because other characters in the | |
7611 | string might need it (consider "\"$@\""), but we need some | |
7612 | way to signal that the final split on the first character | |
7613 | of $IFS should be done, even though QUOTED is 1. */ | |
0001803f | 7614 | /* XXX - should this test include Q_PATQUOTE? */ |
cce855bc JA |
7615 | if (quoted_dollar_at_p && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7616 | *quoted_dollar_at_p = 1; | |
7617 | if (contains_dollar_at) | |
7618 | *contains_dollar_at = 1; | |
7619 | ||
0001803f CR |
7620 | #if 0 |
7621 | if (pflags & PF_NOSPLIT2) | |
7622 | temp = string_list_internal (quoted ? quote_list (list) : list, " "); | |
7623 | else | |
7624 | #endif | |
cce855bc JA |
7625 | /* We want to separate the positional parameters with the first |
7626 | character of $IFS in case $IFS is something other than a space. | |
7627 | We also want to make sure that splitting is done no matter what -- | |
7628 | according to POSIX.2, this expands to a list of the positional | |
7629 | parameters no matter what IFS is set to. */ | |
7630 | temp = string_list_dollar_at (list, quoted); | |
7631 | ||
7632 | dispose_words (list); | |
7633 | break; | |
7634 | ||
7635 | case LBRACE: | |
0001803f | 7636 | tdesc = parameter_brace_expand (string, &zindex, quoted, pflags, |
95732b49 JA |
7637 | quoted_dollar_at_p, |
7638 | contains_dollar_at); | |
7639 | ||
95732b49 JA |
7640 | if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal) |
7641 | return (tdesc); | |
7642 | temp = tdesc ? tdesc->word : (char *)0; | |
cce855bc JA |
7643 | |
7644 | /* XXX */ | |
bb70624e | 7645 | /* Quoted nulls should be removed if there is anything else |
cce855bc JA |
7646 | in the string. */ |
7647 | /* Note that we saw the quoted null so we can add one back at | |
7648 | the end of this function if there are no other characters | |
28ef6c31 JA |
7649 | in the string, discard TEMP, and go on. The exception to |
7650 | this is when we have "${@}" and $1 is '', since $@ needs | |
7651 | special handling. */ | |
95732b49 | 7652 | if (tdesc && tdesc->word && (tdesc->flags & W_HASQUOTEDNULL) && QUOTED_NULL (temp)) |
cce855bc JA |
7653 | { |
7654 | if (had_quoted_null_p) | |
7655 | *had_quoted_null_p = 1; | |
28ef6c31 JA |
7656 | if (*quoted_dollar_at_p == 0) |
7657 | { | |
7658 | free (temp); | |
95732b49 | 7659 | tdesc->word = temp = (char *)NULL; |
28ef6c31 JA |
7660 | } |
7661 | ||
cce855bc JA |
7662 | } |
7663 | ||
95732b49 | 7664 | ret = tdesc; |
cce855bc JA |
7665 | goto return0; |
7666 | ||
7667 | /* Do command or arithmetic substitution. */ | |
7668 | case LPAREN: | |
7669 | /* We have to extract the contents of this paren substitution. */ | |
7670 | t_index = zindex + 1; | |
3185942a | 7671 | temp = extract_command_subst (string, &t_index, 0); |
cce855bc JA |
7672 | zindex = t_index; |
7673 | ||
7674 | /* For Posix.2-style `$(( ))' arithmetic substitution, | |
28ef6c31 | 7675 | extract the expression and pass it to the evaluator. */ |
cce855bc JA |
7676 | if (temp && *temp == LPAREN) |
7677 | { | |
7678 | char *temp2; | |
7679 | temp1 = temp + 1; | |
7680 | temp2 = savestring (temp1); | |
7681 | t_index = strlen (temp2) - 1; | |
7682 | ||
7683 | if (temp2[t_index] != RPAREN) | |
7684 | { | |
7685 | free (temp2); | |
7686 | goto comsub; | |
7687 | } | |
7688 | ||
7689 | /* Cut off ending `)' */ | |
7690 | temp2[t_index] = '\0'; | |
7691 | ||
0628567a JA |
7692 | if (chk_arithsub (temp2, t_index) == 0) |
7693 | { | |
7694 | free (temp2); | |
0001803f CR |
7695 | #if 0 |
7696 | internal_warning (_("future versions of the shell will force evaluation as an arithmetic substitution")); | |
7697 | #endif | |
0628567a JA |
7698 | goto comsub; |
7699 | } | |
7700 | ||
cce855bc | 7701 | /* Expand variables found inside the expression. */ |
0628567a | 7702 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
cce855bc JA |
7703 | free (temp2); |
7704 | ||
7705 | arithsub: | |
7706 | /* No error messages. */ | |
7707 | this_command_name = (char *)NULL; | |
7708 | number = evalexp (temp1, &expok); | |
7709 | free (temp); | |
7710 | free (temp1); | |
7711 | if (expok == 0) | |
7712 | { | |
7713 | if (interactive_shell == 0 && posixly_correct) | |
7714 | { | |
7715 | last_command_exit_value = EXECUTION_FAILURE; | |
95732b49 | 7716 | return (&expand_wdesc_fatal); |
cce855bc JA |
7717 | } |
7718 | else | |
95732b49 | 7719 | return (&expand_wdesc_error); |
cce855bc JA |
7720 | } |
7721 | temp = itos (number); | |
7722 | break; | |
7723 | } | |
7724 | ||
7725 | comsub: | |
b80f6443 JA |
7726 | if (pflags & PF_NOCOMSUB) |
7727 | /* we need zindex+1 because string[zindex] == RPAREN */ | |
7728 | temp1 = substring (string, *sindex, zindex+1); | |
7729 | else | |
3185942a JA |
7730 | { |
7731 | tdesc = command_substitute (temp, quoted); | |
7732 | temp1 = tdesc ? tdesc->word : (char *)NULL; | |
7733 | if (tdesc) | |
7734 | dispose_word_desc (tdesc); | |
7735 | } | |
cce855bc JA |
7736 | FREE (temp); |
7737 | temp = temp1; | |
7738 | break; | |
7739 | ||
7740 | /* Do POSIX.2d9-style arithmetic substitution. This will probably go | |
7741 | away in a future bash release. */ | |
7742 | case '[': | |
bb70624e | 7743 | /* Extract the contents of this arithmetic substitution. */ |
cce855bc JA |
7744 | t_index = zindex + 1; |
7745 | temp = extract_arithmetic_subst (string, &t_index); | |
7746 | zindex = t_index; | |
3185942a JA |
7747 | if (temp == 0) |
7748 | { | |
7749 | temp = savestring (string); | |
7750 | if (expanded_something) | |
7751 | *expanded_something = 0; | |
7752 | goto return0; | |
7753 | } | |
cce855bc JA |
7754 | |
7755 | /* Do initial variable expansion. */ | |
0628567a | 7756 | temp1 = expand_arith_string (temp, Q_DOUBLE_QUOTES); |
cce855bc JA |
7757 | |
7758 | goto arithsub; | |
7759 | ||
7760 | default: | |
7761 | /* Find the variable in VARIABLE_LIST. */ | |
7762 | temp = (char *)NULL; | |
7763 | ||
7764 | for (t_index = zindex; (c = string[zindex]) && legal_variable_char (c); zindex++) | |
7765 | ; | |
7766 | temp1 = (zindex > t_index) ? substring (string, t_index, zindex) : (char *)NULL; | |
7767 | ||
7768 | /* If this isn't a variable name, then just output the `$'. */ | |
7769 | if (temp1 == 0 || *temp1 == '\0') | |
7770 | { | |
7771 | FREE (temp1); | |
f73dda09 | 7772 | temp = (char *)xmalloc (2); |
cce855bc JA |
7773 | temp[0] = '$'; |
7774 | temp[1] = '\0'; | |
7775 | if (expanded_something) | |
7776 | *expanded_something = 0; | |
7777 | goto return0; | |
7778 | } | |
7779 | ||
7780 | /* If the variable exists, return its value cell. */ | |
7781 | var = find_variable (temp1); | |
7782 | ||
7117c2d2 | 7783 | if (var && invisible_p (var) == 0 && var_isset (var)) |
cce855bc JA |
7784 | { |
7785 | #if defined (ARRAY_VARS) | |
3185942a | 7786 | if (assoc_p (var) || array_p (var)) |
cce855bc | 7787 | { |
3185942a JA |
7788 | temp = array_p (var) ? array_reference (array_cell (var), 0) |
7789 | : assoc_reference (assoc_cell (var), "0"); | |
cce855bc | 7790 | if (temp) |
b80f6443 JA |
7791 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7792 | ? quote_string (temp) | |
7793 | : quote_escapes (temp); | |
7794 | else if (unbound_vars_is_error) | |
7795 | goto unbound_variable; | |
cce855bc JA |
7796 | } |
7797 | else | |
7798 | #endif | |
b80f6443 JA |
7799 | { |
7800 | temp = value_cell (var); | |
7801 | ||
7802 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7803 | ? quote_string (temp) | |
7804 | : quote_escapes (temp); | |
7805 | } | |
7806 | ||
cce855bc | 7807 | free (temp1); |
7117c2d2 | 7808 | |
cce855bc JA |
7809 | goto return0; |
7810 | } | |
7811 | ||
7812 | temp = (char *)NULL; | |
7813 | ||
b80f6443 | 7814 | unbound_variable: |
cce855bc | 7815 | if (unbound_vars_is_error) |
0001803f CR |
7816 | { |
7817 | last_command_exit_value = EXECUTION_FAILURE; | |
7818 | err_unboundvar (temp1); | |
7819 | } | |
cce855bc JA |
7820 | else |
7821 | { | |
7822 | free (temp1); | |
7823 | goto return0; | |
7824 | } | |
7825 | ||
7826 | free (temp1); | |
7827 | last_command_exit_value = EXECUTION_FAILURE; | |
7828 | return ((unbound_vars_is_error && interactive_shell == 0) | |
95732b49 JA |
7829 | ? &expand_wdesc_fatal |
7830 | : &expand_wdesc_error); | |
cce855bc JA |
7831 | } |
7832 | ||
7833 | if (string[zindex]) | |
7834 | zindex++; | |
7835 | ||
7836 | return0: | |
7837 | *sindex = zindex; | |
95732b49 JA |
7838 | |
7839 | if (ret == 0) | |
7840 | { | |
7841 | ret = alloc_word_desc (); | |
7842 | ret->flags = tflag; /* XXX */ | |
7843 | ret->word = temp; | |
7844 | } | |
7845 | return ret; | |
cce855bc JA |
7846 | } |
7847 | ||
7848 | /* Make a word list which is the result of parameter and variable | |
7849 | expansion, command substitution, arithmetic substitution, and | |
7850 | quote removal of WORD. Return a pointer to a WORD_LIST which is | |
7851 | the result of the expansion. If WORD contains a null word, the | |
7852 | word list returned is also null. | |
726f6388 | 7853 | |
ccc6cda3 JA |
7854 | QUOTED contains flag values defined in shell.h. |
7855 | ||
b72432fd JA |
7856 | ISEXP is used to tell expand_word_internal that the word should be |
7857 | treated as the result of an expansion. This has implications for | |
7858 | how IFS characters in the word are treated. | |
7859 | ||
726f6388 JA |
7860 | CONTAINS_DOLLAR_AT and EXPANDED_SOMETHING are return values; when non-null |
7861 | they point to an integer value which receives information about expansion. | |
7862 | CONTAINS_DOLLAR_AT gets non-zero if WORD contained "$@", else zero. | |
7863 | EXPANDED_SOMETHING get non-zero if WORD contained any parameter expansions, | |
7864 | else zero. | |
7865 | ||
7866 | This only does word splitting in the case of $@ expansion. In that | |
7867 | case, we split on ' '. */ | |
7868 | ||
7869 | /* Values for the local variable quoted_state. */ | |
7870 | #define UNQUOTED 0 | |
7871 | #define PARTIALLY_QUOTED 1 | |
7872 | #define WHOLLY_QUOTED 2 | |
7873 | ||
7874 | static WORD_LIST * | |
b72432fd | 7875 | expand_word_internal (word, quoted, isexp, contains_dollar_at, expanded_something) |
726f6388 | 7876 | WORD_DESC *word; |
b72432fd | 7877 | int quoted, isexp; |
726f6388 JA |
7878 | int *contains_dollar_at; |
7879 | int *expanded_something; | |
7880 | { | |
ccc6cda3 JA |
7881 | WORD_LIST *list; |
7882 | WORD_DESC *tword; | |
726f6388 JA |
7883 | |
7884 | /* The intermediate string that we build while expanding. */ | |
ccc6cda3 | 7885 | char *istring; |
726f6388 JA |
7886 | |
7887 | /* The current size of the above object. */ | |
ccc6cda3 | 7888 | int istring_size; |
726f6388 JA |
7889 | |
7890 | /* Index into ISTRING. */ | |
ccc6cda3 | 7891 | int istring_index; |
726f6388 JA |
7892 | |
7893 | /* Temporary string storage. */ | |
ccc6cda3 | 7894 | char *temp, *temp1; |
726f6388 JA |
7895 | |
7896 | /* The text of WORD. */ | |
ccc6cda3 | 7897 | register char *string; |
726f6388 | 7898 | |
7117c2d2 JA |
7899 | /* The size of STRING. */ |
7900 | size_t string_size; | |
7901 | ||
726f6388 | 7902 | /* The index into STRING. */ |
ccc6cda3 | 7903 | int sindex; |
726f6388 JA |
7904 | |
7905 | /* This gets 1 if we see a $@ while quoted. */ | |
ccc6cda3 | 7906 | int quoted_dollar_at; |
726f6388 JA |
7907 | |
7908 | /* One of UNQUOTED, PARTIALLY_QUOTED, or WHOLLY_QUOTED, depending on | |
7909 | whether WORD contains no quoting characters, a partially quoted | |
7910 | string (e.g., "xx"ab), or is fully quoted (e.g., "xxab"). */ | |
ccc6cda3 JA |
7911 | int quoted_state; |
7912 | ||
95732b49 | 7913 | /* State flags */ |
ccc6cda3 | 7914 | int had_quoted_null; |
cce855bc | 7915 | int has_dollar_at; |
28ef6c31 | 7916 | int tflag; |
0001803f | 7917 | int pflags; /* flags passed to param_expand */ |
726f6388 | 7918 | |
95732b49 JA |
7919 | int assignoff; /* If assignment, offset of `=' */ |
7920 | ||
f73dda09 | 7921 | register unsigned char c; /* Current character. */ |
726f6388 | 7922 | int t_index; /* For calls to string_extract_xxx. */ |
726f6388 | 7923 | |
bb70624e | 7924 | char twochars[2]; |
b72432fd | 7925 | |
7117c2d2 JA |
7926 | DECLARE_MBSTATE; |
7927 | ||
f73dda09 | 7928 | istring = (char *)xmalloc (istring_size = DEFAULT_INITIAL_ARRAY_SIZE); |
ccc6cda3 | 7929 | istring[istring_index = 0] = '\0'; |
cce855bc | 7930 | quoted_dollar_at = had_quoted_null = has_dollar_at = 0; |
ccc6cda3 JA |
7931 | quoted_state = UNQUOTED; |
7932 | ||
7933 | string = word->word; | |
7934 | if (string == 0) | |
7935 | goto finished_with_string; | |
95732b49 JA |
7936 | /* Don't need the string length for the SADD... and COPY_ macros unless |
7937 | multibyte characters are possible. */ | |
7938 | string_size = (MB_CUR_MAX > 1) ? strlen (string) : 1; | |
726f6388 JA |
7939 | |
7940 | if (contains_dollar_at) | |
7941 | *contains_dollar_at = 0; | |
7942 | ||
95732b49 JA |
7943 | assignoff = -1; |
7944 | ||
726f6388 JA |
7945 | /* Begin the expansion. */ |
7946 | ||
ccc6cda3 | 7947 | for (sindex = 0; ;) |
726f6388 JA |
7948 | { |
7949 | c = string[sindex]; | |
7950 | ||
7951 | /* Case on toplevel character. */ | |
7952 | switch (c) | |
7953 | { | |
7954 | case '\0': | |
7955 | goto finished_with_string; | |
7956 | ||
7957 | case CTLESC: | |
7117c2d2 JA |
7958 | sindex++; |
7959 | #if HANDLE_MULTIBYTE | |
7960 | if (MB_CUR_MAX > 1 && string[sindex]) | |
7961 | { | |
b80f6443 | 7962 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
7963 | } |
7964 | else | |
7965 | #endif | |
7966 | { | |
7967 | temp = (char *)xmalloc (3); | |
7968 | temp[0] = CTLESC; | |
7969 | temp[1] = c = string[sindex]; | |
7970 | temp[2] = '\0'; | |
7971 | } | |
726f6388 | 7972 | |
cce855bc | 7973 | dollar_add_string: |
726f6388 JA |
7974 | if (string[sindex]) |
7975 | sindex++; | |
7976 | ||
cce855bc JA |
7977 | add_string: |
7978 | if (temp) | |
7979 | { | |
7980 | istring = sub_append_string (temp, istring, &istring_index, &istring_size); | |
7981 | temp = (char *)0; | |
7982 | } | |
7983 | ||
7984 | break; | |
726f6388 JA |
7985 | |
7986 | #if defined (PROCESS_SUBSTITUTION) | |
7987 | /* Process substitution. */ | |
7988 | case '<': | |
7989 | case '>': | |
7990 | { | |
0628567a | 7991 | if (string[++sindex] != LPAREN || (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (word->flags & (W_DQUOTE|W_NOPROCSUB)) || posixly_correct) |
726f6388 | 7992 | { |
bb70624e | 7993 | sindex--; /* add_character: label increments sindex */ |
726f6388 JA |
7994 | goto add_character; |
7995 | } | |
7996 | else | |
cce855bc | 7997 | t_index = sindex + 1; /* skip past both '<' and LPAREN */ |
726f6388 | 7998 | |
cce855bc | 7999 | temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index); /*))*/ |
ccc6cda3 | 8000 | sindex = t_index; |
726f6388 JA |
8001 | |
8002 | /* If the process substitution specification is `<()', we want to | |
8003 | open the pipe for writing in the child and produce output; if | |
8004 | it is `>()', we want to open the pipe for reading in the child | |
8005 | and consume input. */ | |
ccc6cda3 | 8006 | temp = temp1 ? process_substitute (temp1, (c == '>')) : (char *)0; |
726f6388 JA |
8007 | |
8008 | FREE (temp1); | |
8009 | ||
8010 | goto dollar_add_string; | |
8011 | } | |
8012 | #endif /* PROCESS_SUBSTITUTION */ | |
8013 | ||
95732b49 JA |
8014 | case '=': |
8015 | /* Posix.2 section 3.6.1 says that tildes following `=' in words | |
8016 | which are not assignment statements are not expanded. If the | |
8017 | shell isn't in posix mode, though, we perform tilde expansion | |
8018 | on `likely candidate' unquoted assignment statements (flags | |
8019 | include W_ASSIGNMENT but not W_QUOTED). A likely candidate | |
8020 | contains an unquoted :~ or =~. Something to think about: we | |
8021 | now have a flag that says to perform tilde expansion on arguments | |
8022 | to `assignment builtins' like declare and export that look like | |
8023 | assignment statements. We now do tilde expansion on such words | |
8024 | even in POSIX mode. */ | |
8025 | if (word->flags & (W_ASSIGNRHS|W_NOTILDE)) | |
17345e5a | 8026 | { |
0001803f | 8027 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8028 | goto add_ifs_character; |
8029 | else | |
8030 | goto add_character; | |
8031 | } | |
95732b49 JA |
8032 | /* If we're not in posix mode or forcing assignment-statement tilde |
8033 | expansion, note where the `=' appears in the word and prepare to | |
8034 | do tilde expansion following the first `='. */ | |
8035 | if ((word->flags & W_ASSIGNMENT) && | |
8036 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
8037 | assignoff == -1 && sindex > 0) | |
8038 | assignoff = sindex; | |
8039 | if (sindex == assignoff && string[sindex+1] == '~') /* XXX */ | |
8040 | word->flags |= W_ITILDE; | |
8041 | #if 0 | |
8042 | else if ((word->flags & W_ASSIGNMENT) && | |
8043 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
8044 | string[sindex+1] == '~') | |
8045 | word->flags |= W_ITILDE; | |
8046 | #endif | |
0001803f | 8047 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8048 | goto add_ifs_character; |
8049 | else | |
8050 | goto add_character; | |
95732b49 JA |
8051 | |
8052 | case ':': | |
8053 | if (word->flags & W_NOTILDE) | |
17345e5a | 8054 | { |
0001803f | 8055 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8056 | goto add_ifs_character; |
8057 | else | |
8058 | goto add_character; | |
8059 | } | |
95732b49 JA |
8060 | |
8061 | if ((word->flags & (W_ASSIGNMENT|W_ASSIGNRHS|W_TILDEEXP)) && | |
8062 | string[sindex+1] == '~') | |
8063 | word->flags |= W_ITILDE; | |
17345e5a | 8064 | |
0001803f | 8065 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8066 | goto add_ifs_character; |
8067 | else | |
8068 | goto add_character; | |
95732b49 JA |
8069 | |
8070 | case '~': | |
8071 | /* If the word isn't supposed to be tilde expanded, or we're not | |
8072 | at the start of a word or after an unquoted : or = in an | |
8073 | assignment statement, we don't do tilde expansion. */ | |
8074 | if ((word->flags & (W_NOTILDE|W_DQUOTE)) || | |
8075 | (sindex > 0 && ((word->flags & W_ITILDE) == 0)) || | |
8076 | (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
8077 | { | |
8078 | word->flags &= ~W_ITILDE; | |
0001803f | 8079 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) |
17345e5a JA |
8080 | goto add_ifs_character; |
8081 | else | |
8082 | goto add_character; | |
95732b49 JA |
8083 | } |
8084 | ||
8085 | if (word->flags & W_ASSIGNRHS) | |
8086 | tflag = 2; | |
8087 | else if (word->flags & (W_ASSIGNMENT|W_TILDEEXP)) | |
8088 | tflag = 1; | |
8089 | else | |
8090 | tflag = 0; | |
8091 | ||
8092 | temp = bash_tilde_find_word (string + sindex, tflag, &t_index); | |
8093 | ||
8094 | word->flags &= ~W_ITILDE; | |
8095 | ||
8096 | if (temp && *temp && t_index > 0) | |
8097 | { | |
8098 | temp1 = bash_tilde_expand (temp, tflag); | |
0628567a JA |
8099 | if (temp1 && *temp1 == '~' && STREQ (temp, temp1)) |
8100 | { | |
8101 | FREE (temp); | |
8102 | FREE (temp1); | |
8103 | goto add_character; /* tilde expansion failed */ | |
8104 | } | |
95732b49 JA |
8105 | free (temp); |
8106 | temp = temp1; | |
8107 | sindex += t_index; | |
3185942a | 8108 | goto add_quoted_string; /* XXX was add_string */ |
95732b49 JA |
8109 | } |
8110 | else | |
8111 | { | |
8112 | FREE (temp); | |
8113 | goto add_character; | |
8114 | } | |
8115 | ||
726f6388 | 8116 | case '$': |
726f6388 JA |
8117 | if (expanded_something) |
8118 | *expanded_something = 1; | |
8119 | ||
cce855bc | 8120 | has_dollar_at = 0; |
0001803f CR |
8121 | pflags = (word->flags & W_NOCOMSUB) ? PF_NOCOMSUB : 0; |
8122 | if (word->flags & W_NOSPLIT2) | |
8123 | pflags |= PF_NOSPLIT2; | |
95732b49 | 8124 | tword = param_expand (string, &sindex, quoted, expanded_something, |
cce855bc | 8125 | &has_dollar_at, "ed_dollar_at, |
0001803f | 8126 | &had_quoted_null, pflags); |
726f6388 | 8127 | |
95732b49 | 8128 | if (tword == &expand_wdesc_error || tword == &expand_wdesc_fatal) |
726f6388 | 8129 | { |
cce855bc JA |
8130 | free (string); |
8131 | free (istring); | |
95732b49 JA |
8132 | return ((tword == &expand_wdesc_error) ? &expand_word_error |
8133 | : &expand_word_fatal); | |
cce855bc JA |
8134 | } |
8135 | if (contains_dollar_at && has_dollar_at) | |
8136 | *contains_dollar_at = 1; | |
95732b49 JA |
8137 | |
8138 | if (tword && (tword->flags & W_HASQUOTEDNULL)) | |
8139 | had_quoted_null = 1; | |
8140 | ||
8141 | temp = tword->word; | |
8142 | dispose_word_desc (tword); | |
8143 | ||
cce855bc JA |
8144 | goto add_string; |
8145 | break; | |
726f6388 | 8146 | |
cce855bc JA |
8147 | case '`': /* Backquoted command substitution. */ |
8148 | { | |
b80f6443 | 8149 | t_index = sindex++; |
726f6388 | 8150 | |
3185942a | 8151 | temp = string_extract (string, &sindex, "`", SX_REQMATCH); |
95732b49 JA |
8152 | /* The test of sindex against t_index is to allow bare instances of |
8153 | ` to pass through, for backwards compatibility. */ | |
8154 | if (temp == &extract_string_error || temp == &extract_string_fatal) | |
8155 | { | |
8156 | if (sindex - 1 == t_index) | |
8157 | { | |
8158 | sindex = t_index; | |
8159 | goto add_character; | |
8160 | } | |
3185942a | 8161 | report_error (_("bad substitution: no closing \"`\" in %s") , string+t_index); |
95732b49 JA |
8162 | free (string); |
8163 | free (istring); | |
8164 | return ((temp == &extract_string_error) ? &expand_word_error | |
8165 | : &expand_word_fatal); | |
8166 | } | |
8167 | ||
cce855bc JA |
8168 | if (expanded_something) |
8169 | *expanded_something = 1; | |
726f6388 | 8170 | |
b80f6443 JA |
8171 | if (word->flags & W_NOCOMSUB) |
8172 | /* sindex + 1 because string[sindex] == '`' */ | |
8173 | temp1 = substring (string, t_index, sindex + 1); | |
8174 | else | |
8175 | { | |
8176 | de_backslash (temp); | |
3185942a JA |
8177 | tword = command_substitute (temp, quoted); |
8178 | temp1 = tword ? tword->word : (char *)NULL; | |
8179 | if (tword) | |
8180 | dispose_word_desc (tword); | |
b80f6443 | 8181 | } |
cce855bc JA |
8182 | FREE (temp); |
8183 | temp = temp1; | |
8184 | goto dollar_add_string; | |
8185 | } | |
ccc6cda3 | 8186 | |
cce855bc JA |
8187 | case '\\': |
8188 | if (string[sindex + 1] == '\n') | |
8189 | { | |
8190 | sindex += 2; | |
8191 | continue; | |
8192 | } | |
726f6388 | 8193 | |
cce855bc | 8194 | c = string[++sindex]; |
726f6388 | 8195 | |
cce855bc | 8196 | if (quoted & Q_HERE_DOCUMENT) |
28ef6c31 | 8197 | tflag = CBSHDOC; |
cce855bc | 8198 | else if (quoted & Q_DOUBLE_QUOTES) |
28ef6c31 | 8199 | tflag = CBSDQUOTE; |
cce855bc | 8200 | else |
28ef6c31 JA |
8201 | tflag = 0; |
8202 | ||
495aee44 CR |
8203 | /* From Posix discussion on austin-group list: Backslash escaping |
8204 | a } in ${...} is removed. Issue 0000221 */ | |
8205 | if ((quoted & Q_DOLBRACE) && c == RBRACE) | |
8206 | { | |
8207 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); | |
8208 | } | |
8209 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0)) | |
cce855bc | 8210 | { |
7117c2d2 | 8211 | SCOPY_CHAR_I (twochars, '\\', c, string, sindex, string_size); |
bb70624e JA |
8212 | } |
8213 | else if (c == 0) | |
8214 | { | |
8215 | c = CTLNUL; | |
8216 | sindex--; /* add_character: label increments sindex */ | |
8217 | goto add_character; | |
cce855bc JA |
8218 | } |
8219 | else | |
bb70624e | 8220 | { |
7117c2d2 | 8221 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
bb70624e | 8222 | } |
726f6388 | 8223 | |
bb70624e JA |
8224 | sindex++; |
8225 | add_twochars: | |
8226 | /* BEFORE jumping here, we need to increment sindex if appropriate */ | |
8227 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, | |
8228 | DEFAULT_ARRAY_SIZE); | |
8229 | istring[istring_index++] = twochars[0]; | |
8230 | istring[istring_index++] = twochars[1]; | |
8231 | istring[istring_index] = '\0'; | |
8232 | ||
8233 | break; | |
726f6388 | 8234 | |
cce855bc | 8235 | case '"': |
7117c2d2 | 8236 | #if 0 |
95732b49 | 8237 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE)) |
7117c2d2 | 8238 | #else |
95732b49 | 8239 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
7117c2d2 | 8240 | #endif |
cce855bc | 8241 | goto add_character; |
ccc6cda3 JA |
8242 | |
8243 | t_index = ++sindex; | |
8244 | temp = string_extract_double_quoted (string, &sindex, 0); | |
8245 | ||
8246 | /* If the quotes surrounded the entire string, then the | |
8247 | whole word was quoted. */ | |
8248 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
8249 | ? WHOLLY_QUOTED | |
7117c2d2 | 8250 | : PARTIALLY_QUOTED; |
ccc6cda3 JA |
8251 | |
8252 | if (temp && *temp) | |
726f6388 | 8253 | { |
95732b49 JA |
8254 | tword = alloc_word_desc (); |
8255 | tword->word = temp; | |
8256 | ||
ccc6cda3 JA |
8257 | temp = (char *)NULL; |
8258 | ||
cce855bc | 8259 | has_dollar_at = 0; |
95732b49 | 8260 | /* Need to get W_HASQUOTEDNULL flag through this function. */ |
b72432fd | 8261 | list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &has_dollar_at, (int *)NULL); |
726f6388 | 8262 | |
ccc6cda3 JA |
8263 | if (list == &expand_word_error || list == &expand_word_fatal) |
8264 | { | |
8265 | free (istring); | |
8266 | free (string); | |
8267 | /* expand_word_internal has already freed temp_word->word | |
8268 | for us because of the way it prints error messages. */ | |
8269 | tword->word = (char *)NULL; | |
8270 | dispose_word (tword); | |
8271 | return list; | |
8272 | } | |
726f6388 | 8273 | |
ccc6cda3 | 8274 | dispose_word (tword); |
726f6388 | 8275 | |
ccc6cda3 JA |
8276 | /* "$@" (a double-quoted dollar-at) expands into nothing, |
8277 | not even a NULL word, when there are no positional | |
8278 | parameters. */ | |
cce855bc | 8279 | if (list == 0 && has_dollar_at) |
726f6388 | 8280 | { |
ccc6cda3 JA |
8281 | quoted_dollar_at++; |
8282 | break; | |
8283 | } | |
8284 | ||
8285 | /* If we get "$@", we know we have expanded something, so we | |
8286 | need to remember it for the final split on $IFS. This is | |
8287 | a special case; it's the only case where a quoted string | |
8288 | can expand into more than one word. It's going to come back | |
8289 | from the above call to expand_word_internal as a list with | |
8290 | a single word, in which all characters are quoted and | |
8291 | separated by blanks. What we want to do is to turn it back | |
8292 | into a list for the next piece of code. */ | |
8293 | if (list) | |
8294 | dequote_list (list); | |
8295 | ||
95732b49 JA |
8296 | if (list && list->word && (list->word->flags & W_HASQUOTEDNULL)) |
8297 | had_quoted_null = 1; | |
8298 | ||
cce855bc | 8299 | if (has_dollar_at) |
ccc6cda3 JA |
8300 | { |
8301 | quoted_dollar_at++; | |
8302 | if (contains_dollar_at) | |
8303 | *contains_dollar_at = 1; | |
8304 | if (expanded_something) | |
8305 | *expanded_something = 1; | |
8306 | } | |
8307 | } | |
8308 | else | |
8309 | { | |
8310 | /* What we have is "". This is a minor optimization. */ | |
f73dda09 | 8311 | FREE (temp); |
ccc6cda3 JA |
8312 | list = (WORD_LIST *)NULL; |
8313 | } | |
8314 | ||
8315 | /* The code above *might* return a list (consider the case of "$@", | |
8316 | where it returns "$1", "$2", etc.). We can't throw away the | |
8317 | rest of the list, and we have to make sure each word gets added | |
8318 | as quoted. We test on tresult->next: if it is non-NULL, we | |
8319 | quote the whole list, save it to a string with string_list, and | |
8320 | add that string. We don't need to quote the results of this | |
8321 | (and it would be wrong, since that would quote the separators | |
8322 | as well), so we go directly to add_string. */ | |
8323 | if (list) | |
8324 | { | |
8325 | if (list->next) | |
8326 | { | |
0001803f | 8327 | #if 0 |
495aee44 | 8328 | if (quoted_dollar_at && (word->flags & W_NOSPLIT2)) |
0001803f CR |
8329 | temp = string_list_internal (quote_list (list), " "); |
8330 | else | |
8331 | #endif | |
bc4cd23c JA |
8332 | /* Testing quoted_dollar_at makes sure that "$@" is |
8333 | split correctly when $IFS does not contain a space. */ | |
8334 | temp = quoted_dollar_at | |
8335 | ? string_list_dollar_at (list, Q_DOUBLE_QUOTES) | |
8336 | : string_list (quote_list (list)); | |
ccc6cda3 | 8337 | dispose_words (list); |
726f6388 JA |
8338 | goto add_string; |
8339 | } | |
8340 | else | |
8341 | { | |
ccc6cda3 | 8342 | temp = savestring (list->word->word); |
95732b49 | 8343 | tflag = list->word->flags; |
ccc6cda3 | 8344 | dispose_words (list); |
95732b49 | 8345 | |
cce855bc JA |
8346 | /* If the string is not a quoted null string, we want |
8347 | to remove any embedded unquoted CTLNUL characters. | |
8348 | We do not want to turn quoted null strings back into | |
8349 | the empty string, though. We do this because we | |
8350 | want to remove any quoted nulls from expansions that | |
8351 | contain other characters. For example, if we have | |
8352 | x"$*"y or "x$*y" and there are no positional parameters, | |
7117c2d2 | 8353 | the $* should expand into nothing. */ |
95732b49 JA |
8354 | /* We use the W_HASQUOTEDNULL flag to differentiate the |
8355 | cases: a quoted null character as above and when | |
8356 | CTLNUL is contained in the (non-null) expansion | |
8357 | of some variable. We use the had_quoted_null flag to | |
8358 | pass the value through this function to its caller. */ | |
8359 | if ((tflag & W_HASQUOTEDNULL) && QUOTED_NULL (temp) == 0) | |
cce855bc | 8360 | remove_quoted_nulls (temp); /* XXX */ |
726f6388 JA |
8361 | } |
8362 | } | |
ccc6cda3 JA |
8363 | else |
8364 | temp = (char *)NULL; | |
726f6388 | 8365 | |
ccc6cda3 JA |
8366 | /* We do not want to add quoted nulls to strings that are only |
8367 | partially quoted; we can throw them away. */ | |
495aee44 | 8368 | if (temp == 0 && quoted_state == PARTIALLY_QUOTED && (word->flags & (W_NOSPLIT|W_NOSPLIT2))) |
cce855bc | 8369 | continue; |
726f6388 | 8370 | |
ccc6cda3 | 8371 | add_quoted_string: |
726f6388 | 8372 | |
ccc6cda3 JA |
8373 | if (temp) |
8374 | { | |
8375 | temp1 = temp; | |
8376 | temp = quote_string (temp); | |
8377 | free (temp1); | |
bb70624e | 8378 | goto add_string; |
ccc6cda3 JA |
8379 | } |
8380 | else | |
8381 | { | |
8382 | /* Add NULL arg. */ | |
bb70624e JA |
8383 | c = CTLNUL; |
8384 | sindex--; /* add_character: label increments sindex */ | |
8385 | goto add_character; | |
ccc6cda3 | 8386 | } |
bb70624e | 8387 | |
ccc6cda3 | 8388 | /* break; */ |
726f6388 | 8389 | |
ccc6cda3 | 8390 | case '\'': |
7117c2d2 | 8391 | #if 0 |
95732b49 | 8392 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (word->flags & W_DQUOTE)) |
7117c2d2 | 8393 | #else |
95732b49 | 8394 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
7117c2d2 | 8395 | #endif |
ccc6cda3 | 8396 | goto add_character; |
726f6388 | 8397 | |
ccc6cda3 JA |
8398 | t_index = ++sindex; |
8399 | temp = string_extract_single_quoted (string, &sindex); | |
726f6388 | 8400 | |
ccc6cda3 JA |
8401 | /* If the entire STRING was surrounded by single quotes, |
8402 | then the string is wholly quoted. */ | |
8403 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
8404 | ? WHOLLY_QUOTED | |
7117c2d2 | 8405 | : PARTIALLY_QUOTED; |
726f6388 | 8406 | |
ccc6cda3 JA |
8407 | /* If all we had was '', it is a null expansion. */ |
8408 | if (*temp == '\0') | |
8409 | { | |
8410 | free (temp); | |
8411 | temp = (char *)NULL; | |
8412 | } | |
8413 | else | |
7117c2d2 | 8414 | remove_quoted_escapes (temp); /* ??? */ |
726f6388 | 8415 | |
ccc6cda3 JA |
8416 | /* We do not want to add quoted nulls to strings that are only |
8417 | partially quoted; such nulls are discarded. */ | |
8418 | if (temp == 0 && (quoted_state == PARTIALLY_QUOTED)) | |
8419 | continue; | |
726f6388 | 8420 | |
bb70624e JA |
8421 | /* If we have a quoted null expansion, add a quoted NULL to istring. */ |
8422 | if (temp == 0) | |
8423 | { | |
8424 | c = CTLNUL; | |
8425 | sindex--; /* add_character: label increments sindex */ | |
8426 | goto add_character; | |
8427 | } | |
8428 | else | |
8429 | goto add_quoted_string; | |
8430 | ||
ccc6cda3 | 8431 | /* break; */ |
726f6388 JA |
8432 | |
8433 | default: | |
726f6388 | 8434 | /* This is the fix for " $@ " */ |
17345e5a | 8435 | add_ifs_character: |
7117c2d2 | 8436 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (isexp == 0 && isifs (c))) |
726f6388 | 8437 | { |
bb70624e JA |
8438 | if (string[sindex]) /* from old goto dollar_add_string */ |
8439 | sindex++; | |
8440 | if (c == 0) | |
8441 | { | |
8442 | c = CTLNUL; | |
8443 | goto add_character; | |
8444 | } | |
8445 | else | |
8446 | { | |
7117c2d2 | 8447 | #if HANDLE_MULTIBYTE |
b80f6443 JA |
8448 | if (MB_CUR_MAX > 1) |
8449 | sindex--; | |
8450 | ||
7117c2d2 JA |
8451 | if (MB_CUR_MAX > 1) |
8452 | { | |
b80f6443 | 8453 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
8454 | } |
8455 | else | |
8456 | #endif | |
8457 | { | |
8458 | twochars[0] = CTLESC; | |
8459 | twochars[1] = c; | |
8460 | goto add_twochars; | |
8461 | } | |
bb70624e | 8462 | } |
726f6388 JA |
8463 | } |
8464 | ||
7117c2d2 JA |
8465 | SADD_MBCHAR (temp, string, sindex, string_size); |
8466 | ||
726f6388 | 8467 | add_character: |
ccc6cda3 JA |
8468 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 1, istring_size, |
8469 | DEFAULT_ARRAY_SIZE); | |
726f6388 JA |
8470 | istring[istring_index++] = c; |
8471 | istring[istring_index] = '\0'; | |
8472 | ||
8473 | /* Next character. */ | |
8474 | sindex++; | |
8475 | } | |
8476 | } | |
8477 | ||
8478 | finished_with_string: | |
726f6388 JA |
8479 | /* OK, we're ready to return. If we have a quoted string, and |
8480 | quoted_dollar_at is not set, we do no splitting at all; otherwise | |
8481 | we split on ' '. The routines that call this will handle what to | |
8482 | do if nothing has been expanded. */ | |
ccc6cda3 JA |
8483 | |
8484 | /* Partially and wholly quoted strings which expand to the empty | |
8485 | string are retained as an empty arguments. Unquoted strings | |
8486 | which expand to the empty string are discarded. The single | |
8487 | exception is the case of expanding "$@" when there are no | |
8488 | positional parameters. In that case, we discard the expansion. */ | |
8489 | ||
8490 | /* Because of how the code that handles "" and '' in partially | |
8491 | quoted strings works, we need to make ISTRING into a QUOTED_NULL | |
8492 | if we saw quoting characters, but the expansion was empty. | |
8493 | "" and '' are tossed away before we get to this point when | |
8494 | processing partially quoted strings. This makes "" and $xxx"" | |
8495 | equivalent when xxx is unset. We also look to see whether we | |
8496 | saw a quoted null from a ${} expansion and add one back if we | |
8497 | need to. */ | |
8498 | ||
8499 | /* If we expand to nothing and there were no single or double quotes | |
8500 | in the word, we throw it away. Otherwise, we return a NULL word. | |
8501 | The single exception is for $@ surrounded by double quotes when | |
8502 | there are no positional parameters. In that case, we also throw | |
8503 | the word away. */ | |
8504 | ||
8505 | if (*istring == '\0') | |
8506 | { | |
8507 | if (quoted_dollar_at == 0 && (had_quoted_null || quoted_state == PARTIALLY_QUOTED)) | |
726f6388 | 8508 | { |
726f6388 JA |
8509 | istring[0] = CTLNUL; |
8510 | istring[1] = '\0'; | |
ccc6cda3 | 8511 | tword = make_bare_word (istring); |
95732b49 | 8512 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ |
ccc6cda3 JA |
8513 | list = make_word_list (tword, (WORD_LIST *)NULL); |
8514 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
8515 | tword->flags |= W_QUOTED; | |
726f6388 | 8516 | } |
ccc6cda3 JA |
8517 | /* According to sh, ksh, and Posix.2, if a word expands into nothing |
8518 | and a double-quoted "$@" appears anywhere in it, then the entire | |
8519 | word is removed. */ | |
8520 | else if (quoted_state == UNQUOTED || quoted_dollar_at) | |
8521 | list = (WORD_LIST *)NULL; | |
8522 | #if 0 | |
8523 | else | |
726f6388 | 8524 | { |
ccc6cda3 | 8525 | tword = make_bare_word (istring); |
ccc6cda3 JA |
8526 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
8527 | tword->flags |= W_QUOTED; | |
95732b49 | 8528 | list = make_word_list (tword, (WORD_LIST *)NULL); |
726f6388 | 8529 | } |
f73dda09 JA |
8530 | #else |
8531 | else | |
8532 | list = (WORD_LIST *)NULL; | |
ccc6cda3 JA |
8533 | #endif |
8534 | } | |
8535 | else if (word->flags & W_NOSPLIT) | |
8536 | { | |
8537 | tword = make_bare_word (istring); | |
ccc6cda3 JA |
8538 | if (word->flags & W_ASSIGNMENT) |
8539 | tword->flags |= W_ASSIGNMENT; /* XXX */ | |
95732b49 JA |
8540 | if (word->flags & W_COMPASSIGN) |
8541 | tword->flags |= W_COMPASSIGN; /* XXX */ | |
b72432fd JA |
8542 | if (word->flags & W_NOGLOB) |
8543 | tword->flags |= W_NOGLOB; /* XXX */ | |
95732b49 JA |
8544 | if (word->flags & W_NOEXPAND) |
8545 | tword->flags |= W_NOEXPAND; /* XXX */ | |
ccc6cda3 | 8546 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
28ef6c31 | 8547 | tword->flags |= W_QUOTED; |
95732b49 JA |
8548 | if (had_quoted_null) |
8549 | tword->flags |= W_HASQUOTEDNULL; | |
8550 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
ccc6cda3 JA |
8551 | } |
8552 | else | |
8553 | { | |
8554 | char *ifs_chars; | |
8555 | ||
7117c2d2 | 8556 | ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL; |
726f6388 | 8557 | |
cce855bc JA |
8558 | /* If we have $@, we need to split the results no matter what. If |
8559 | IFS is unset or NULL, string_list_dollar_at has separated the | |
8560 | positional parameters with a space, so we split on space (we have | |
8561 | set ifs_chars to " \t\n" above if ifs is unset). If IFS is set, | |
8562 | string_list_dollar_at has separated the positional parameters | |
8563 | with the first character of $IFS, so we split on $IFS. */ | |
8564 | if (has_dollar_at && ifs_chars) | |
8565 | list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1); | |
ccc6cda3 JA |
8566 | else |
8567 | { | |
8568 | tword = make_bare_word (istring); | |
ccc6cda3 JA |
8569 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED)) |
8570 | tword->flags |= W_QUOTED; | |
8571 | if (word->flags & W_ASSIGNMENT) | |
8572 | tword->flags |= W_ASSIGNMENT; | |
95732b49 JA |
8573 | if (word->flags & W_COMPASSIGN) |
8574 | tword->flags |= W_COMPASSIGN; | |
b72432fd JA |
8575 | if (word->flags & W_NOGLOB) |
8576 | tword->flags |= W_NOGLOB; | |
95732b49 JA |
8577 | if (word->flags & W_NOEXPAND) |
8578 | tword->flags |= W_NOEXPAND; | |
8579 | if (had_quoted_null) | |
8580 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ | |
8581 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
726f6388 | 8582 | } |
726f6388 | 8583 | } |
726f6388 | 8584 | |
ccc6cda3 JA |
8585 | free (istring); |
8586 | return (list); | |
726f6388 JA |
8587 | } |
8588 | ||
8589 | /* **************************************************************** */ | |
8590 | /* */ | |
8591 | /* Functions for Quote Removal */ | |
8592 | /* */ | |
8593 | /* **************************************************************** */ | |
8594 | ||
8595 | /* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the | |
7117c2d2 | 8596 | backslash quoting rules for within double quotes or a here document. */ |
726f6388 JA |
8597 | char * |
8598 | string_quote_removal (string, quoted) | |
8599 | char *string; | |
8600 | int quoted; | |
8601 | { | |
7117c2d2 JA |
8602 | size_t slen; |
8603 | char *r, *result_string, *temp, *send; | |
f73dda09 JA |
8604 | int sindex, tindex, dquote; |
8605 | unsigned char c; | |
7117c2d2 | 8606 | DECLARE_MBSTATE; |
726f6388 JA |
8607 | |
8608 | /* The result can be no longer than the original string. */ | |
7117c2d2 JA |
8609 | slen = strlen (string); |
8610 | send = string + slen; | |
8611 | ||
8612 | r = result_string = (char *)xmalloc (slen + 1); | |
726f6388 | 8613 | |
ccc6cda3 | 8614 | for (dquote = sindex = 0; c = string[sindex];) |
726f6388 JA |
8615 | { |
8616 | switch (c) | |
8617 | { | |
8618 | case '\\': | |
8619 | c = string[++sindex]; | |
3185942a JA |
8620 | if (c == 0) |
8621 | { | |
8622 | *r++ = '\\'; | |
8623 | break; | |
8624 | } | |
28ef6c31 | 8625 | if (((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) && (sh_syntaxtab[c] & CBSDQUOTE) == 0) |
726f6388 | 8626 | *r++ = '\\'; |
ccc6cda3 | 8627 | /* FALLTHROUGH */ |
726f6388 JA |
8628 | |
8629 | default: | |
7117c2d2 | 8630 | SCOPY_CHAR_M (r, string, send, sindex); |
726f6388 JA |
8631 | break; |
8632 | ||
8633 | case '\'': | |
ccc6cda3 | 8634 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) |
726f6388 JA |
8635 | { |
8636 | *r++ = c; | |
8637 | sindex++; | |
ccc6cda3 | 8638 | break; |
726f6388 | 8639 | } |
ccc6cda3 JA |
8640 | tindex = sindex + 1; |
8641 | temp = string_extract_single_quoted (string, &tindex); | |
8642 | if (temp) | |
726f6388 | 8643 | { |
ccc6cda3 JA |
8644 | strcpy (r, temp); |
8645 | r += strlen (r); | |
8646 | free (temp); | |
726f6388 | 8647 | } |
ccc6cda3 | 8648 | sindex = tindex; |
726f6388 JA |
8649 | break; |
8650 | ||
8651 | case '"': | |
8652 | dquote = 1 - dquote; | |
8653 | sindex++; | |
8654 | break; | |
8655 | } | |
8656 | } | |
8657 | *r = '\0'; | |
8658 | return (result_string); | |
8659 | } | |
8660 | ||
ccc6cda3 JA |
8661 | #if 0 |
8662 | /* UNUSED */ | |
726f6388 JA |
8663 | /* Perform quote removal on word WORD. This allocates and returns a new |
8664 | WORD_DESC *. */ | |
8665 | WORD_DESC * | |
8666 | word_quote_removal (word, quoted) | |
8667 | WORD_DESC *word; | |
8668 | int quoted; | |
8669 | { | |
8670 | WORD_DESC *w; | |
8671 | char *t; | |
8672 | ||
8673 | t = string_quote_removal (word->word, quoted); | |
95732b49 JA |
8674 | w = alloc_word_desc (); |
8675 | w->word = t ? t : savestring (""); | |
726f6388 JA |
8676 | return (w); |
8677 | } | |
8678 | ||
8679 | /* Perform quote removal on all words in LIST. If QUOTED is non-zero, | |
8680 | the members of the list are treated as if they are surrounded by | |
8681 | double quotes. Return a new list, or NULL if LIST is NULL. */ | |
8682 | WORD_LIST * | |
8683 | word_list_quote_removal (list, quoted) | |
8684 | WORD_LIST *list; | |
8685 | int quoted; | |
8686 | { | |
95732b49 | 8687 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 8688 | |
ccc6cda3 | 8689 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 8690 | { |
7117c2d2 | 8691 | tresult = make_word_list (word_quote_removal (t->word, quoted), (WORD_LIST *)NULL); |
95732b49 | 8692 | #if 0 |
726f6388 | 8693 | result = (WORD_LIST *) list_append (result, tresult); |
95732b49 JA |
8694 | #else |
8695 | if (result == 0) | |
8696 | result = e = tresult; | |
8697 | else | |
8698 | { | |
8699 | e->next = tresult; | |
8700 | while (e->next) | |
8701 | e = e->next; | |
8702 | } | |
8703 | #endif | |
726f6388 JA |
8704 | } |
8705 | return (result); | |
8706 | } | |
ccc6cda3 | 8707 | #endif |
726f6388 | 8708 | |
726f6388 JA |
8709 | /******************************************* |
8710 | * * | |
8711 | * Functions to perform word splitting * | |
8712 | * * | |
8713 | *******************************************/ | |
8714 | ||
7117c2d2 JA |
8715 | void |
8716 | setifs (v) | |
8717 | SHELL_VAR *v; | |
b72432fd | 8718 | { |
7117c2d2 JA |
8719 | char *t; |
8720 | unsigned char uc; | |
8721 | ||
8722 | ifs_var = v; | |
95732b49 | 8723 | ifs_value = (v && value_cell (v)) ? value_cell (v) : " \t\n"; |
b72432fd | 8724 | |
95732b49 JA |
8725 | /* Should really merge ifs_cmap with sh_syntaxtab. XXX - doesn't yet |
8726 | handle multibyte chars in IFS */ | |
7117c2d2 JA |
8727 | memset (ifs_cmap, '\0', sizeof (ifs_cmap)); |
8728 | for (t = ifs_value ; t && *t; t++) | |
8729 | { | |
8730 | uc = *t; | |
8731 | ifs_cmap[uc] = 1; | |
8732 | } | |
8733 | ||
95732b49 JA |
8734 | #if defined (HANDLE_MULTIBYTE) |
8735 | if (ifs_value == 0) | |
8736 | { | |
8737 | ifs_firstc[0] = '\0'; | |
8738 | ifs_firstc_len = 1; | |
8739 | } | |
8740 | else | |
8741 | { | |
8742 | size_t ifs_len; | |
8743 | ifs_len = strnlen (ifs_value, MB_CUR_MAX); | |
8744 | ifs_firstc_len = MBLEN (ifs_value, ifs_len); | |
8745 | if (ifs_firstc_len == 1 || ifs_firstc_len == 0 || MB_INVALIDCH (ifs_firstc_len)) | |
8746 | { | |
8747 | ifs_firstc[0] = ifs_value[0]; | |
8748 | ifs_firstc[1] = '\0'; | |
8749 | ifs_firstc_len = 1; | |
8750 | } | |
8751 | else | |
8752 | memcpy (ifs_firstc, ifs_value, ifs_firstc_len); | |
8753 | } | |
8754 | #else | |
7117c2d2 | 8755 | ifs_firstc = ifs_value ? *ifs_value : 0; |
95732b49 | 8756 | #endif |
7117c2d2 JA |
8757 | } |
8758 | ||
8759 | char * | |
8760 | getifs () | |
8761 | { | |
8762 | return ifs_value; | |
b72432fd JA |
8763 | } |
8764 | ||
726f6388 JA |
8765 | /* This splits a single word into a WORD LIST on $IFS, but only if the word |
8766 | is not quoted. list_string () performs quote removal for us, even if we | |
8767 | don't do any splitting. */ | |
8768 | WORD_LIST * | |
7117c2d2 | 8769 | word_split (w, ifs_chars) |
726f6388 | 8770 | WORD_DESC *w; |
7117c2d2 | 8771 | char *ifs_chars; |
726f6388 JA |
8772 | { |
8773 | WORD_LIST *result; | |
8774 | ||
8775 | if (w) | |
8776 | { | |
7117c2d2 | 8777 | char *xifs; |
726f6388 | 8778 | |
7117c2d2 JA |
8779 | xifs = ((w->flags & W_QUOTED) || ifs_chars == 0) ? "" : ifs_chars; |
8780 | result = list_string (w->word, xifs, w->flags & W_QUOTED); | |
726f6388 JA |
8781 | } |
8782 | else | |
8783 | result = (WORD_LIST *)NULL; | |
ccc6cda3 | 8784 | |
726f6388 JA |
8785 | return (result); |
8786 | } | |
8787 | ||
8788 | /* Perform word splitting on LIST and return the RESULT. It is possible | |
8789 | to return (WORD_LIST *)NULL. */ | |
8790 | static WORD_LIST * | |
8791 | word_list_split (list) | |
8792 | WORD_LIST *list; | |
8793 | { | |
95732b49 | 8794 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 8795 | |
ccc6cda3 | 8796 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 8797 | { |
7117c2d2 | 8798 | tresult = word_split (t->word, ifs_value); |
95732b49 JA |
8799 | if (result == 0) |
8800 | result = e = tresult; | |
8801 | else | |
8802 | { | |
8803 | e->next = tresult; | |
8804 | while (e->next) | |
8805 | e = e->next; | |
8806 | } | |
726f6388 JA |
8807 | } |
8808 | return (result); | |
8809 | } | |
8810 | ||
8811 | /************************************************** | |
8812 | * * | |
cce855bc | 8813 | * Functions to expand an entire WORD_LIST * |
726f6388 JA |
8814 | * * |
8815 | **************************************************/ | |
8816 | ||
b80f6443 JA |
8817 | /* Do any word-expansion-specific cleanup and jump to top_level */ |
8818 | static void | |
8819 | exp_jump_to_top_level (v) | |
8820 | int v; | |
8821 | { | |
3185942a JA |
8822 | set_pipestatus_from_exit (last_command_exit_value); |
8823 | ||
b80f6443 JA |
8824 | /* Cleanup code goes here. */ |
8825 | expand_no_split_dollar_star = 0; /* XXX */ | |
8826 | expanding_redir = 0; | |
3185942a | 8827 | assigning_in_environment = 0; |
b80f6443 | 8828 | |
f1be666c JA |
8829 | if (parse_and_execute_level == 0) |
8830 | top_level_cleanup (); /* from sig.c */ | |
8831 | ||
b80f6443 JA |
8832 | jump_to_top_level (v); |
8833 | } | |
8834 | ||
cce855bc JA |
8835 | /* Put NLIST (which is a WORD_LIST * of only one element) at the front of |
8836 | ELIST, and set ELIST to the new list. */ | |
8837 | #define PREPEND_LIST(nlist, elist) \ | |
8838 | do { nlist->next = elist; elist = nlist; } while (0) | |
8839 | ||
726f6388 JA |
8840 | /* Separate out any initial variable assignments from TLIST. If set -k has |
8841 | been executed, remove all assignment statements from TLIST. Initial | |
8842 | variable assignments and other environment assignments are placed | |
bb70624e | 8843 | on SUBST_ASSIGN_VARLIST. */ |
726f6388 JA |
8844 | static WORD_LIST * |
8845 | separate_out_assignments (tlist) | |
8846 | WORD_LIST *tlist; | |
8847 | { | |
8848 | register WORD_LIST *vp, *lp; | |
8849 | ||
0001803f | 8850 | if (tlist == 0) |
726f6388 JA |
8851 | return ((WORD_LIST *)NULL); |
8852 | ||
bb70624e JA |
8853 | if (subst_assign_varlist) |
8854 | dispose_words (subst_assign_varlist); /* Clean up after previous error */ | |
b72432fd | 8855 | |
bb70624e | 8856 | subst_assign_varlist = (WORD_LIST *)NULL; |
726f6388 JA |
8857 | vp = lp = tlist; |
8858 | ||
8859 | /* Separate out variable assignments at the start of the command. | |
8860 | Loop invariant: vp->next == lp | |
8861 | Loop postcondition: | |
7117c2d2 JA |
8862 | lp = list of words left after assignment statements skipped |
8863 | tlist = original list of words | |
726f6388 | 8864 | */ |
ccc6cda3 | 8865 | while (lp && (lp->word->flags & W_ASSIGNMENT)) |
726f6388 JA |
8866 | { |
8867 | vp = lp; | |
8868 | lp = lp->next; | |
8869 | } | |
8870 | ||
bb70624e JA |
8871 | /* If lp != tlist, we have some initial assignment statements. |
8872 | We make SUBST_ASSIGN_VARLIST point to the list of assignment | |
8873 | words and TLIST point to the remaining words. */ | |
726f6388 JA |
8874 | if (lp != tlist) |
8875 | { | |
bb70624e | 8876 | subst_assign_varlist = tlist; |
726f6388 JA |
8877 | /* ASSERT(vp->next == lp); */ |
8878 | vp->next = (WORD_LIST *)NULL; /* terminate variable list */ | |
8879 | tlist = lp; /* remainder of word list */ | |
8880 | } | |
8881 | ||
8882 | /* vp == end of variable list */ | |
8883 | /* tlist == remainder of original word list without variable assignments */ | |
8884 | if (!tlist) | |
8885 | /* All the words in tlist were assignment statements */ | |
8886 | return ((WORD_LIST *)NULL); | |
8887 | ||
8888 | /* ASSERT(tlist != NULL); */ | |
ccc6cda3 | 8889 | /* ASSERT((tlist->word->flags & W_ASSIGNMENT) == 0); */ |
726f6388 JA |
8890 | |
8891 | /* If the -k option is in effect, we need to go through the remaining | |
bb70624e JA |
8892 | words, separate out the assignment words, and place them on |
8893 | SUBST_ASSIGN_VARLIST. */ | |
726f6388 JA |
8894 | if (place_keywords_in_env) |
8895 | { | |
8896 | WORD_LIST *tp; /* tp == running pointer into tlist */ | |
8897 | ||
8898 | tp = tlist; | |
8899 | lp = tlist->next; | |
8900 | ||
8901 | /* Loop Invariant: tp->next == lp */ | |
8902 | /* Loop postcondition: tlist == word list without assignment statements */ | |
8903 | while (lp) | |
8904 | { | |
ccc6cda3 | 8905 | if (lp->word->flags & W_ASSIGNMENT) |
726f6388 JA |
8906 | { |
8907 | /* Found an assignment statement, add this word to end of | |
bb70624e JA |
8908 | subst_assign_varlist (vp). */ |
8909 | if (!subst_assign_varlist) | |
8910 | subst_assign_varlist = vp = lp; | |
726f6388 JA |
8911 | else |
8912 | { | |
8913 | vp->next = lp; | |
8914 | vp = lp; | |
8915 | } | |
8916 | ||
8917 | /* Remove the word pointed to by LP from TLIST. */ | |
8918 | tp->next = lp->next; | |
8919 | /* ASSERT(vp == lp); */ | |
8920 | lp->next = (WORD_LIST *)NULL; | |
8921 | lp = tp->next; | |
8922 | } | |
8923 | else | |
8924 | { | |
8925 | tp = lp; | |
8926 | lp = lp->next; | |
8927 | } | |
8928 | } | |
8929 | } | |
8930 | return (tlist); | |
8931 | } | |
8932 | ||
cce855bc JA |
8933 | #define WEXP_VARASSIGN 0x001 |
8934 | #define WEXP_BRACEEXP 0x002 | |
8935 | #define WEXP_TILDEEXP 0x004 | |
8936 | #define WEXP_PARAMEXP 0x008 | |
8937 | #define WEXP_PATHEXP 0x010 | |
8938 | ||
8939 | /* All of the expansions, including variable assignments at the start of | |
8940 | the list. */ | |
8941 | #define WEXP_ALL (WEXP_VARASSIGN|WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
8942 | ||
8943 | /* All of the expansions except variable assignments at the start of | |
8944 | the list. */ | |
8945 | #define WEXP_NOVARS (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
8946 | ||
8947 | /* All of the `shell expansions': brace expansion, tilde expansion, parameter | |
8948 | expansion, command substitution, arithmetic expansion, word splitting, and | |
8949 | quote removal. */ | |
8950 | #define WEXP_SHELLEXP (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP) | |
8951 | ||
726f6388 JA |
8952 | /* Take the list of words in LIST and do the various substitutions. Return |
8953 | a new list of words which is the expanded list, and without things like | |
8954 | variable assignments. */ | |
8955 | ||
8956 | WORD_LIST * | |
8957 | expand_words (list) | |
8958 | WORD_LIST *list; | |
8959 | { | |
cce855bc | 8960 | return (expand_word_list_internal (list, WEXP_ALL)); |
726f6388 JA |
8961 | } |
8962 | ||
8963 | /* Same as expand_words (), but doesn't hack variable or environment | |
8964 | variables. */ | |
8965 | WORD_LIST * | |
8966 | expand_words_no_vars (list) | |
8967 | WORD_LIST *list; | |
8968 | { | |
cce855bc | 8969 | return (expand_word_list_internal (list, WEXP_NOVARS)); |
726f6388 JA |
8970 | } |
8971 | ||
cce855bc JA |
8972 | WORD_LIST * |
8973 | expand_words_shellexp (list) | |
726f6388 | 8974 | WORD_LIST *list; |
726f6388 | 8975 | { |
cce855bc JA |
8976 | return (expand_word_list_internal (list, WEXP_SHELLEXP)); |
8977 | } | |
726f6388 | 8978 | |
cce855bc JA |
8979 | static WORD_LIST * |
8980 | glob_expand_word_list (tlist, eflags) | |
8981 | WORD_LIST *tlist; | |
8982 | int eflags; | |
8983 | { | |
8984 | char **glob_array, *temp_string; | |
8985 | register int glob_index; | |
8986 | WORD_LIST *glob_list, *output_list, *disposables, *next; | |
8987 | WORD_DESC *tword; | |
726f6388 | 8988 | |
cce855bc JA |
8989 | output_list = disposables = (WORD_LIST *)NULL; |
8990 | glob_array = (char **)NULL; | |
8991 | while (tlist) | |
8992 | { | |
8993 | /* For each word, either globbing is attempted or the word is | |
8994 | added to orig_list. If globbing succeeds, the results are | |
8995 | added to orig_list and the word (tlist) is added to the list | |
8996 | of disposable words. If globbing fails and failed glob | |
8997 | expansions are left unchanged (the shell default), the | |
8998 | original word is added to orig_list. If globbing fails and | |
8999 | failed glob expansions are removed, the original word is | |
9000 | added to the list of disposable words. orig_list ends up | |
7117c2d2 | 9001 | in reverse order and requires a call to REVERSE_LIST to |
cce855bc JA |
9002 | be set right. After all words are examined, the disposable |
9003 | words are freed. */ | |
9004 | next = tlist->next; | |
726f6388 | 9005 | |
cce855bc | 9006 | /* If the word isn't an assignment and contains an unquoted |
28ef6c31 | 9007 | pattern matching character, then glob it. */ |
b72432fd | 9008 | if ((tlist->word->flags & W_NOGLOB) == 0 && |
cce855bc | 9009 | unquoted_glob_pattern_p (tlist->word->word)) |
726f6388 | 9010 | { |
cce855bc JA |
9011 | glob_array = shell_glob_filename (tlist->word->word); |
9012 | ||
9013 | /* Handle error cases. | |
9014 | I don't think we should report errors like "No such file | |
9015 | or directory". However, I would like to report errors | |
9016 | like "Read failed". */ | |
9017 | ||
b80f6443 | 9018 | if (glob_array == 0 || GLOB_FAILED (glob_array)) |
726f6388 | 9019 | { |
bb70624e | 9020 | glob_array = (char **)xmalloc (sizeof (char *)); |
cce855bc JA |
9021 | glob_array[0] = (char *)NULL; |
9022 | } | |
9023 | ||
9024 | /* Dequote the current word in case we have to use it. */ | |
9025 | if (glob_array[0] == NULL) | |
9026 | { | |
9027 | temp_string = dequote_string (tlist->word->word); | |
9028 | free (tlist->word->word); | |
9029 | tlist->word->word = temp_string; | |
9030 | } | |
9031 | ||
9032 | /* Make the array into a word list. */ | |
9033 | glob_list = (WORD_LIST *)NULL; | |
9034 | for (glob_index = 0; glob_array[glob_index]; glob_index++) | |
9035 | { | |
9036 | tword = make_bare_word (glob_array[glob_index]); | |
9037 | tword->flags |= W_GLOBEXP; /* XXX */ | |
9038 | glob_list = make_word_list (tword, glob_list); | |
9039 | } | |
9040 | ||
9041 | if (glob_list) | |
9042 | { | |
9043 | output_list = (WORD_LIST *)list_append (glob_list, output_list); | |
9044 | PREPEND_LIST (tlist, disposables); | |
9045 | } | |
b80f6443 JA |
9046 | else if (fail_glob_expansion != 0) |
9047 | { | |
9048 | report_error (_("no match: %s"), tlist->word->word); | |
f1be666c | 9049 | exp_jump_to_top_level (DISCARD); |
b80f6443 | 9050 | } |
cce855bc JA |
9051 | else if (allow_null_glob_expansion == 0) |
9052 | { | |
9053 | /* Failed glob expressions are left unchanged. */ | |
9054 | PREPEND_LIST (tlist, output_list); | |
9055 | } | |
9056 | else | |
9057 | { | |
9058 | /* Failed glob expressions are removed. */ | |
9059 | PREPEND_LIST (tlist, disposables); | |
726f6388 | 9060 | } |
726f6388 | 9061 | } |
cce855bc JA |
9062 | else |
9063 | { | |
9064 | /* Dequote the string. */ | |
9065 | temp_string = dequote_string (tlist->word->word); | |
9066 | free (tlist->word->word); | |
9067 | tlist->word->word = temp_string; | |
9068 | PREPEND_LIST (tlist, output_list); | |
9069 | } | |
9070 | ||
7117c2d2 | 9071 | strvec_dispose (glob_array); |
cce855bc JA |
9072 | glob_array = (char **)NULL; |
9073 | ||
9074 | tlist = next; | |
726f6388 JA |
9075 | } |
9076 | ||
cce855bc JA |
9077 | if (disposables) |
9078 | dispose_words (disposables); | |
9079 | ||
9080 | if (output_list) | |
9081 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
9082 | ||
9083 | return (output_list); | |
9084 | } | |
726f6388 JA |
9085 | |
9086 | #if defined (BRACE_EXPANSION) | |
cce855bc JA |
9087 | static WORD_LIST * |
9088 | brace_expand_word_list (tlist, eflags) | |
9089 | WORD_LIST *tlist; | |
9090 | int eflags; | |
9091 | { | |
9092 | register char **expansions; | |
9093 | char *temp_string; | |
9094 | WORD_LIST *disposables, *output_list, *next; | |
9095 | WORD_DESC *w; | |
9096 | int eindex; | |
9097 | ||
9098 | for (disposables = output_list = (WORD_LIST *)NULL; tlist; tlist = next) | |
726f6388 | 9099 | { |
cce855bc | 9100 | next = tlist->next; |
726f6388 | 9101 | |
0001803f CR |
9102 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) |
9103 | { | |
9104 | /*itrace("brace_expand_word_list: %s: W_COMPASSIGN|W_ASSIGNARG", tlist->word->word);*/ | |
9105 | PREPEND_LIST (tlist, output_list); | |
9106 | continue; | |
9107 | } | |
9108 | ||
cce855bc JA |
9109 | /* Only do brace expansion if the word has a brace character. If |
9110 | not, just add the word list element to BRACES and continue. In | |
9111 | the common case, at least when running shell scripts, this will | |
0001803f | 9112 | degenerate to a bunch of calls to `mbschr', and then what is |
cce855bc | 9113 | basically a reversal of TLIST into BRACES, which is corrected |
7117c2d2 | 9114 | by a call to REVERSE_LIST () on BRACES when the end of TLIST |
cce855bc | 9115 | is reached. */ |
0001803f | 9116 | if (mbschr (tlist->word->word, LBRACE)) |
726f6388 | 9117 | { |
cce855bc | 9118 | expansions = brace_expand (tlist->word->word); |
726f6388 | 9119 | |
cce855bc | 9120 | for (eindex = 0; temp_string = expansions[eindex]; eindex++) |
726f6388 | 9121 | { |
cce855bc JA |
9122 | w = make_word (temp_string); |
9123 | /* If brace expansion didn't change the word, preserve | |
9124 | the flags. We may want to preserve the flags | |
9125 | unconditionally someday -- XXX */ | |
9126 | if (STREQ (temp_string, tlist->word->word)) | |
9127 | w->flags = tlist->word->flags; | |
9128 | output_list = make_word_list (w, output_list); | |
9129 | free (expansions[eindex]); | |
726f6388 | 9130 | } |
cce855bc | 9131 | free (expansions); |
726f6388 | 9132 | |
cce855bc JA |
9133 | /* Add TLIST to the list of words to be freed after brace |
9134 | expansion has been performed. */ | |
9135 | PREPEND_LIST (tlist, disposables); | |
9136 | } | |
9137 | else | |
9138 | PREPEND_LIST (tlist, output_list); | |
726f6388 | 9139 | } |
cce855bc JA |
9140 | |
9141 | if (disposables) | |
9142 | dispose_words (disposables); | |
9143 | ||
9144 | if (output_list) | |
9145 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
9146 | ||
9147 | return (output_list); | |
9148 | } | |
9149 | #endif | |
9150 | ||
3185942a JA |
9151 | #if defined (ARRAY_VARS) |
9152 | /* Take WORD, a compound associative array assignment, and internally run | |
9153 | 'declare -A w', where W is the variable name portion of WORD. */ | |
9154 | static int | |
9155 | make_internal_declare (word, option) | |
9156 | char *word; | |
9157 | char *option; | |
9158 | { | |
9159 | int t; | |
9160 | WORD_LIST *wl; | |
9161 | WORD_DESC *w; | |
9162 | ||
9163 | w = make_word (word); | |
9164 | ||
9165 | t = assignment (w->word, 0); | |
9166 | w->word[t] = '\0'; | |
9167 | ||
9168 | wl = make_word_list (w, (WORD_LIST *)NULL); | |
9169 | wl = make_word_list (make_word (option), wl); | |
9170 | ||
9171 | return (declare_builtin (wl)); | |
9172 | } | |
9173 | #endif | |
9174 | ||
cce855bc JA |
9175 | static WORD_LIST * |
9176 | shell_expand_word_list (tlist, eflags) | |
9177 | WORD_LIST *tlist; | |
9178 | int eflags; | |
9179 | { | |
9180 | WORD_LIST *expanded, *orig_list, *new_list, *next, *temp_list; | |
9181 | int expanded_something, has_dollar_at; | |
9182 | char *temp_string; | |
726f6388 | 9183 | |
726f6388 | 9184 | /* We do tilde expansion all the time. This is what 1003.2 says. */ |
cce855bc JA |
9185 | new_list = (WORD_LIST *)NULL; |
9186 | for (orig_list = tlist; tlist; tlist = next) | |
726f6388 | 9187 | { |
ccc6cda3 | 9188 | temp_string = tlist->word->word; |
726f6388 JA |
9189 | |
9190 | next = tlist->next; | |
9191 | ||
95732b49 JA |
9192 | #if defined (ARRAY_VARS) |
9193 | /* If this is a compound array assignment to a builtin that accepts | |
9194 | such assignments (e.g., `declare'), take the assignment and perform | |
9195 | it separately, handling the semantics of declarations inside shell | |
9196 | functions. This avoids the double-evaluation of such arguments, | |
9197 | because `declare' does some evaluation of compound assignments on | |
9198 | its own. */ | |
9199 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) | |
9200 | { | |
9201 | int t; | |
9202 | ||
3185942a JA |
9203 | if (tlist->word->flags & W_ASSIGNASSOC) |
9204 | make_internal_declare (tlist->word->word, "-A"); | |
9205 | ||
495aee44 | 9206 | t = do_word_assignment (tlist->word, 0); |
95732b49 JA |
9207 | if (t == 0) |
9208 | { | |
9209 | last_command_exit_value = EXECUTION_FAILURE; | |
9210 | exp_jump_to_top_level (DISCARD); | |
9211 | } | |
9212 | ||
9213 | /* Now transform the word as ksh93 appears to do and go on */ | |
9214 | t = assignment (tlist->word->word, 0); | |
9215 | tlist->word->word[t] = '\0'; | |
3185942a | 9216 | tlist->word->flags &= ~(W_ASSIGNMENT|W_NOSPLIT|W_COMPASSIGN|W_ASSIGNARG|W_ASSIGNASSOC); |
726f6388 | 9217 | } |
95732b49 | 9218 | #endif |
726f6388 | 9219 | |
ccc6cda3 | 9220 | expanded_something = 0; |
726f6388 | 9221 | expanded = expand_word_internal |
b72432fd | 9222 | (tlist->word, 0, 0, &has_dollar_at, &expanded_something); |
726f6388 JA |
9223 | |
9224 | if (expanded == &expand_word_error || expanded == &expand_word_fatal) | |
9225 | { | |
9226 | /* By convention, each time this error is returned, | |
9227 | tlist->word->word has already been freed. */ | |
9228 | tlist->word->word = (char *)NULL; | |
ccc6cda3 | 9229 | |
726f6388 JA |
9230 | /* Dispose our copy of the original list. */ |
9231 | dispose_words (orig_list); | |
d166f048 | 9232 | /* Dispose the new list we're building. */ |
726f6388 JA |
9233 | dispose_words (new_list); |
9234 | ||
28ef6c31 | 9235 | last_command_exit_value = EXECUTION_FAILURE; |
726f6388 | 9236 | if (expanded == &expand_word_error) |
b80f6443 | 9237 | exp_jump_to_top_level (DISCARD); |
726f6388 | 9238 | else |
b80f6443 | 9239 | exp_jump_to_top_level (FORCE_EOF); |
726f6388 JA |
9240 | } |
9241 | ||
ccc6cda3 JA |
9242 | /* Don't split words marked W_NOSPLIT. */ |
9243 | if (expanded_something && (tlist->word->flags & W_NOSPLIT) == 0) | |
726f6388 | 9244 | { |
ccc6cda3 | 9245 | temp_list = word_list_split (expanded); |
726f6388 JA |
9246 | dispose_words (expanded); |
9247 | } | |
9248 | else | |
9249 | { | |
9250 | /* If no parameter expansion, command substitution, process | |
9251 | substitution, or arithmetic substitution took place, then | |
9252 | do not do word splitting. We still have to remove quoted | |
9253 | null characters from the result. */ | |
9254 | word_list_remove_quoted_nulls (expanded); | |
ccc6cda3 | 9255 | temp_list = expanded; |
726f6388 JA |
9256 | } |
9257 | ||
ccc6cda3 JA |
9258 | expanded = REVERSE_LIST (temp_list, WORD_LIST *); |
9259 | new_list = (WORD_LIST *)list_append (expanded, new_list); | |
726f6388 JA |
9260 | } |
9261 | ||
cce855bc JA |
9262 | if (orig_list) |
9263 | dispose_words (orig_list); | |
726f6388 | 9264 | |
726f6388 | 9265 | if (new_list) |
cce855bc | 9266 | new_list = REVERSE_LIST (new_list, WORD_LIST *); |
726f6388 | 9267 | |
cce855bc JA |
9268 | return (new_list); |
9269 | } | |
726f6388 | 9270 | |
cce855bc JA |
9271 | /* The workhorse for expand_words () and expand_words_no_vars (). |
9272 | First arg is LIST, a WORD_LIST of words. | |
b72432fd JA |
9273 | Second arg EFLAGS is a flags word controlling which expansions are |
9274 | performed. | |
726f6388 | 9275 | |
cce855bc JA |
9276 | This does all of the substitutions: brace expansion, tilde expansion, |
9277 | parameter expansion, command substitution, arithmetic expansion, | |
9278 | process substitution, word splitting, and pathname expansion, according | |
9279 | to the bits set in EFLAGS. Words with the W_QUOTED or W_NOSPLIT bits | |
9280 | set, or for which no expansion is done, do not undergo word splitting. | |
b72432fd | 9281 | Words with the W_NOGLOB bit set do not undergo pathname expansion. */ |
cce855bc JA |
9282 | static WORD_LIST * |
9283 | expand_word_list_internal (list, eflags) | |
9284 | WORD_LIST *list; | |
9285 | int eflags; | |
9286 | { | |
9287 | WORD_LIST *new_list, *temp_list; | |
9288 | int tint; | |
726f6388 | 9289 | |
cce855bc JA |
9290 | if (list == 0) |
9291 | return ((WORD_LIST *)NULL); | |
726f6388 | 9292 | |
bb70624e | 9293 | garglist = new_list = copy_word_list (list); |
cce855bc JA |
9294 | if (eflags & WEXP_VARASSIGN) |
9295 | { | |
bb70624e | 9296 | garglist = new_list = separate_out_assignments (new_list); |
cce855bc JA |
9297 | if (new_list == 0) |
9298 | { | |
bb70624e | 9299 | if (subst_assign_varlist) |
cce855bc JA |
9300 | { |
9301 | /* All the words were variable assignments, so they are placed | |
9302 | into the shell's environment. */ | |
bb70624e | 9303 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
cce855bc JA |
9304 | { |
9305 | this_command_name = (char *)NULL; /* no arithmetic errors */ | |
495aee44 | 9306 | tint = do_word_assignment (temp_list->word, 0); |
cce855bc JA |
9307 | /* Variable assignment errors in non-interactive shells |
9308 | running in Posix.2 mode cause the shell to exit. */ | |
28ef6c31 | 9309 | if (tint == 0) |
ccc6cda3 | 9310 | { |
cce855bc | 9311 | last_command_exit_value = EXECUTION_FAILURE; |
28ef6c31 | 9312 | if (interactive_shell == 0 && posixly_correct) |
b80f6443 | 9313 | exp_jump_to_top_level (FORCE_EOF); |
28ef6c31 | 9314 | else |
b80f6443 | 9315 | exp_jump_to_top_level (DISCARD); |
ccc6cda3 | 9316 | } |
726f6388 | 9317 | } |
bb70624e JA |
9318 | dispose_words (subst_assign_varlist); |
9319 | subst_assign_varlist = (WORD_LIST *)NULL; | |
cce855bc JA |
9320 | } |
9321 | return ((WORD_LIST *)NULL); | |
9322 | } | |
9323 | } | |
726f6388 | 9324 | |
cce855bc JA |
9325 | /* Begin expanding the words that remain. The expansions take place on |
9326 | things that aren't really variable assignments. */ | |
726f6388 | 9327 | |
cce855bc JA |
9328 | #if defined (BRACE_EXPANSION) |
9329 | /* Do brace expansion on this word if there are any brace characters | |
9330 | in the string. */ | |
9331 | if ((eflags & WEXP_BRACEEXP) && brace_expansion && new_list) | |
9332 | new_list = brace_expand_word_list (new_list, eflags); | |
9333 | #endif /* BRACE_EXPANSION */ | |
726f6388 | 9334 | |
cce855bc JA |
9335 | /* Perform the `normal' shell expansions: tilde expansion, parameter and |
9336 | variable substitution, command substitution, arithmetic expansion, | |
9337 | and word splitting. */ | |
9338 | new_list = shell_expand_word_list (new_list, eflags); | |
726f6388 | 9339 | |
cce855bc JA |
9340 | /* Okay, we're almost done. Now let's just do some filename |
9341 | globbing. */ | |
9342 | if (new_list) | |
9343 | { | |
9344 | if ((eflags & WEXP_PATHEXP) && disallow_filename_globbing == 0) | |
9345 | /* Glob expand the word list unless globbing has been disabled. */ | |
9346 | new_list = glob_expand_word_list (new_list, eflags); | |
726f6388 | 9347 | else |
cce855bc JA |
9348 | /* Dequote the words, because we're not performing globbing. */ |
9349 | new_list = dequote_list (new_list); | |
726f6388 JA |
9350 | } |
9351 | ||
bb70624e | 9352 | if ((eflags & WEXP_VARASSIGN) && subst_assign_varlist) |
726f6388 | 9353 | { |
95732b49 | 9354 | sh_wassign_func_t *assign_func; |
495aee44 | 9355 | int is_special_builtin, is_builtin_or_func; |
726f6388 JA |
9356 | |
9357 | /* If the remainder of the words expand to nothing, Posix.2 requires | |
9358 | that the variable and environment assignments affect the shell's | |
9359 | environment. */ | |
95732b49 | 9360 | assign_func = new_list ? assign_in_env : do_word_assignment; |
b80f6443 | 9361 | tempenv_assign_error = 0; |
726f6388 | 9362 | |
495aee44 CR |
9363 | is_builtin_or_func = (new_list && new_list->word && (find_shell_builtin (new_list->word->word) || find_function (new_list->word->word))); |
9364 | /* Posix says that special builtins exit if a variable assignment error | |
9365 | occurs in an assignment preceding it. */ | |
9366 | is_special_builtin = (posixly_correct && new_list && new_list->word && find_special_builtin (new_list->word->word)); | |
9367 | ||
bb70624e | 9368 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
726f6388 | 9369 | { |
ccc6cda3 | 9370 | this_command_name = (char *)NULL; |
3185942a | 9371 | assigning_in_environment = (assign_func == assign_in_env); |
495aee44 | 9372 | tint = (*assign_func) (temp_list->word, is_builtin_or_func); |
3185942a | 9373 | assigning_in_environment = 0; |
ccc6cda3 JA |
9374 | /* Variable assignment errors in non-interactive shells running |
9375 | in Posix.2 mode cause the shell to exit. */ | |
b80f6443 | 9376 | if (tint == 0) |
ccc6cda3 | 9377 | { |
95732b49 | 9378 | if (assign_func == do_word_assignment) |
b80f6443 JA |
9379 | { |
9380 | last_command_exit_value = EXECUTION_FAILURE; | |
495aee44 | 9381 | if (interactive_shell == 0 && posixly_correct && is_special_builtin) |
b80f6443 JA |
9382 | exp_jump_to_top_level (FORCE_EOF); |
9383 | else | |
9384 | exp_jump_to_top_level (DISCARD); | |
9385 | } | |
28ef6c31 | 9386 | else |
b80f6443 | 9387 | tempenv_assign_error++; |
ccc6cda3 | 9388 | } |
726f6388 | 9389 | } |
726f6388 | 9390 | |
bb70624e JA |
9391 | dispose_words (subst_assign_varlist); |
9392 | subst_assign_varlist = (WORD_LIST *)NULL; | |
726f6388 JA |
9393 | } |
9394 | ||
cce855bc | 9395 | #if 0 |
ccc6cda3 JA |
9396 | tint = list_length (new_list) + 1; |
9397 | RESIZE_MALLOCED_BUFFER (glob_argv_flags, 0, tint, glob_argv_flags_size, 16); | |
cce855bc JA |
9398 | for (tint = 0, temp_list = new_list; temp_list; temp_list = temp_list->next) |
9399 | glob_argv_flags[tint++] = (temp_list->word->flags & W_GLOBEXP) ? '1' : '0'; | |
ccc6cda3 | 9400 | glob_argv_flags[tint] = '\0'; |
ccc6cda3 | 9401 | #endif |
726f6388 | 9402 | |
cce855bc | 9403 | return (new_list); |
ccc6cda3 | 9404 | } |