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f73dda09 JA |
1 | /* arrayfunc.c -- High-level array functions used by other parts of the shell. */ |
2 | ||
a0c0a00f | 3 | /* Copyright (C) 2001-2016 Free Software Foundation, Inc. |
f73dda09 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
3185942a JA |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
f73dda09 | 11 | |
3185942a JA |
12 | Bash is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
f73dda09 | 16 | |
3185942a JA |
17 | You should have received a copy of the GNU General Public License |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
f73dda09 JA |
20 | |
21 | #include "config.h" | |
22 | ||
23 | #if defined (ARRAY_VARS) | |
24 | ||
25 | #if defined (HAVE_UNISTD_H) | |
26 | # include <unistd.h> | |
27 | #endif | |
28 | #include <stdio.h> | |
29 | ||
b80f6443 JA |
30 | #include "bashintl.h" |
31 | ||
f73dda09 | 32 | #include "shell.h" |
3185942a | 33 | #include "pathexp.h" |
7117c2d2 JA |
34 | |
35 | #include "shmbutil.h" | |
a0c0a00f CR |
36 | #if defined (HAVE_MBSTR_H) && defined (HAVE_MBSCHR) |
37 | # include <mbstr.h> /* mbschr */ | |
38 | #endif | |
7117c2d2 | 39 | |
f73dda09 JA |
40 | #include "builtins/common.h" |
41 | ||
42 | extern char *this_command_name; | |
43 | extern int last_command_exit_value; | |
95732b49 JA |
44 | extern int array_needs_making; |
45 | ||
3185942a | 46 | static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int)); |
ac50fbac | 47 | static SHELL_VAR *assign_array_element_internal __P((SHELL_VAR *, char *, char *, char *, int, char *, int)); |
f73dda09 | 48 | |
3185942a | 49 | static char *quote_assign __P((const char *)); |
f73dda09 | 50 | static void quote_array_assignment_chars __P((WORD_LIST *)); |
a0c0a00f | 51 | static char *array_value_internal __P((const char *, int, int, int *, arrayind_t *)); |
f73dda09 | 52 | |
b80f6443 | 53 | /* Standard error message to use when encountering an invalid array subscript */ |
3185942a | 54 | const char * const bash_badsub_errmsg = N_("bad array subscript"); |
b80f6443 | 55 | |
f73dda09 JA |
56 | /* **************************************************************** */ |
57 | /* */ | |
58 | /* Functions to manipulate array variables and perform assignments */ | |
59 | /* */ | |
60 | /* **************************************************************** */ | |
61 | ||
62 | /* Convert a shell variable to an array variable. The original value is | |
63 | saved as array[0]. */ | |
64 | SHELL_VAR * | |
65 | convert_var_to_array (var) | |
66 | SHELL_VAR *var; | |
67 | { | |
68 | char *oldval; | |
69 | ARRAY *array; | |
70 | ||
71 | oldval = value_cell (var); | |
7117c2d2 | 72 | array = array_create (); |
b80f6443 JA |
73 | if (oldval) |
74 | array_insert (array, 0, oldval); | |
f73dda09 JA |
75 | |
76 | FREE (value_cell (var)); | |
7117c2d2 JA |
77 | var_setarray (var, array); |
78 | ||
79 | /* these aren't valid anymore */ | |
80 | var->dynamic_value = (sh_var_value_func_t *)NULL; | |
81 | var->assign_func = (sh_var_assign_func_t *)NULL; | |
f73dda09 JA |
82 | |
83 | INVALIDATE_EXPORTSTR (var); | |
95732b49 JA |
84 | if (exported_p (var)) |
85 | array_needs_making++; | |
f73dda09 JA |
86 | |
87 | VSETATTR (var, att_array); | |
88 | VUNSETATTR (var, att_invisible); | |
89 | ||
a0c0a00f CR |
90 | /* Make sure it's not marked as an associative array any more */ |
91 | VUNSETATTR (var, att_assoc); | |
92 | ||
93 | /* Since namerefs can't be array variables, turn off nameref attribute */ | |
94 | VUNSETATTR (var, att_nameref); | |
95 | ||
f73dda09 JA |
96 | return var; |
97 | } | |
98 | ||
3185942a JA |
99 | /* Convert a shell variable to an array variable. The original value is |
100 | saved as array[0]. */ | |
101 | SHELL_VAR * | |
102 | convert_var_to_assoc (var) | |
103 | SHELL_VAR *var; | |
104 | { | |
105 | char *oldval; | |
106 | HASH_TABLE *hash; | |
107 | ||
108 | oldval = value_cell (var); | |
109 | hash = assoc_create (0); | |
110 | if (oldval) | |
89a92869 | 111 | assoc_insert (hash, savestring ("0"), oldval); |
3185942a JA |
112 | |
113 | FREE (value_cell (var)); | |
114 | var_setassoc (var, hash); | |
115 | ||
116 | /* these aren't valid anymore */ | |
117 | var->dynamic_value = (sh_var_value_func_t *)NULL; | |
118 | var->assign_func = (sh_var_assign_func_t *)NULL; | |
119 | ||
120 | INVALIDATE_EXPORTSTR (var); | |
121 | if (exported_p (var)) | |
122 | array_needs_making++; | |
123 | ||
124 | VSETATTR (var, att_assoc); | |
125 | VUNSETATTR (var, att_invisible); | |
126 | ||
a0c0a00f CR |
127 | /* Make sure it's not marked as an indexed array any more */ |
128 | VUNSETATTR (var, att_array); | |
129 | ||
130 | /* Since namerefs can't be array variables, turn off nameref attribute */ | |
131 | VUNSETATTR (var, att_nameref); | |
132 | ||
3185942a JA |
133 | return var; |
134 | } | |
135 | ||
ac50fbac CR |
136 | char * |
137 | make_array_variable_value (entry, ind, key, value, flags) | |
95732b49 JA |
138 | SHELL_VAR *entry; |
139 | arrayind_t ind; | |
3185942a | 140 | char *key; |
95732b49 JA |
141 | char *value; |
142 | int flags; | |
143 | { | |
144 | SHELL_VAR *dentry; | |
145 | char *newval; | |
146 | ||
147 | /* If we're appending, we need the old value of the array reference, so | |
148 | fake out make_variable_value with a dummy SHELL_VAR */ | |
149 | if (flags & ASS_APPEND) | |
150 | { | |
151 | dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); | |
152 | dentry->name = savestring (entry->name); | |
3185942a JA |
153 | if (assoc_p (entry)) |
154 | newval = assoc_reference (assoc_cell (entry), key); | |
155 | else | |
156 | newval = array_reference (array_cell (entry), ind); | |
95732b49 JA |
157 | if (newval) |
158 | dentry->value = savestring (newval); | |
159 | else | |
160 | { | |
161 | dentry->value = (char *)xmalloc (1); | |
162 | dentry->value[0] = '\0'; | |
163 | } | |
164 | dentry->exportstr = 0; | |
3185942a | 165 | dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported); |
95732b49 JA |
166 | /* Leave the rest of the members uninitialized; the code doesn't look |
167 | at them. */ | |
168 | newval = make_variable_value (dentry, value, flags); | |
169 | dispose_variable (dentry); | |
170 | } | |
171 | else | |
172 | newval = make_variable_value (entry, value, flags); | |
173 | ||
ac50fbac CR |
174 | return newval; |
175 | } | |
176 | ||
177 | static SHELL_VAR * | |
178 | bind_array_var_internal (entry, ind, key, value, flags) | |
179 | SHELL_VAR *entry; | |
180 | arrayind_t ind; | |
181 | char *key; | |
182 | char *value; | |
183 | int flags; | |
184 | { | |
185 | char *newval; | |
186 | ||
187 | newval = make_array_variable_value (entry, ind, key, value, flags); | |
188 | ||
95732b49 | 189 | if (entry->assign_func) |
3185942a JA |
190 | (*entry->assign_func) (entry, newval, ind, key); |
191 | else if (assoc_p (entry)) | |
192 | assoc_insert (assoc_cell (entry), key, newval); | |
95732b49 JA |
193 | else |
194 | array_insert (array_cell (entry), ind, newval); | |
195 | FREE (newval); | |
196 | ||
35751626 | 197 | VUNSETATTR (entry, att_invisible); /* no longer invisible */ |
95732b49 JA |
198 | return (entry); |
199 | } | |
200 | ||
f73dda09 JA |
201 | /* Perform an array assignment name[ind]=value. If NAME already exists and |
202 | is not an array, and IND is 0, perform name=value instead. If NAME exists | |
203 | and is not an array, and IND is not 0, convert it into an array with the | |
204 | existing value as name[0]. | |
205 | ||
206 | If NAME does not exist, just create an array variable, no matter what | |
207 | IND's value may be. */ | |
208 | SHELL_VAR * | |
95732b49 | 209 | bind_array_variable (name, ind, value, flags) |
f73dda09 JA |
210 | char *name; |
211 | arrayind_t ind; | |
212 | char *value; | |
95732b49 | 213 | int flags; |
f73dda09 JA |
214 | { |
215 | SHELL_VAR *entry; | |
f73dda09 | 216 | |
ac50fbac | 217 | entry = find_shell_variable (name); |
f73dda09 | 218 | |
a0c0a00f CR |
219 | if (entry == (SHELL_VAR *) 0) |
220 | { | |
221 | /* Is NAME a nameref variable that points to an unset variable? */ | |
222 | entry = find_variable_nameref_for_create (name, 0); | |
223 | if (entry == INVALID_NAMEREF_VALUE) | |
224 | return ((SHELL_VAR *)0); | |
225 | if (entry && nameref_p (entry)) | |
226 | entry = make_new_array_variable (nameref_cell (entry)); | |
227 | } | |
f73dda09 JA |
228 | if (entry == (SHELL_VAR *) 0) |
229 | entry = make_new_array_variable (name); | |
a0c0a00f | 230 | else if ((readonly_p (entry) && (flags&ASS_FORCE) == 0) || noassign_p (entry)) |
f73dda09 JA |
231 | { |
232 | if (readonly_p (entry)) | |
7117c2d2 | 233 | err_readonly (name); |
f73dda09 JA |
234 | return (entry); |
235 | } | |
236 | else if (array_p (entry) == 0) | |
237 | entry = convert_var_to_array (entry); | |
238 | ||
239 | /* ENTRY is an array variable, and ARRAY points to the value. */ | |
3185942a JA |
240 | return (bind_array_var_internal (entry, ind, 0, value, flags)); |
241 | } | |
242 | ||
243 | SHELL_VAR * | |
244 | bind_array_element (entry, ind, value, flags) | |
245 | SHELL_VAR *entry; | |
246 | arrayind_t ind; | |
247 | char *value; | |
248 | int flags; | |
249 | { | |
250 | return (bind_array_var_internal (entry, ind, 0, value, flags)); | |
251 | } | |
252 | ||
253 | SHELL_VAR * | |
254 | bind_assoc_variable (entry, name, key, value, flags) | |
255 | SHELL_VAR *entry; | |
256 | char *name; | |
257 | char *key; | |
258 | char *value; | |
259 | int flags; | |
260 | { | |
261 | SHELL_VAR *dentry; | |
262 | char *newval; | |
263 | ||
a0c0a00f | 264 | if ((readonly_p (entry) && (flags&ASS_FORCE) == 0) || noassign_p (entry)) |
3185942a JA |
265 | { |
266 | if (readonly_p (entry)) | |
267 | err_readonly (name); | |
268 | return (entry); | |
269 | } | |
270 | ||
271 | return (bind_array_var_internal (entry, 0, key, value, flags)); | |
f73dda09 JA |
272 | } |
273 | ||
274 | /* Parse NAME, a lhs of an assignment statement of the form v[s], and | |
275 | assign VALUE to that array element by calling bind_array_variable(). */ | |
276 | SHELL_VAR * | |
95732b49 | 277 | assign_array_element (name, value, flags) |
f73dda09 | 278 | char *name, *value; |
95732b49 | 279 | int flags; |
f73dda09 | 280 | { |
ac50fbac | 281 | char *sub, *vname; |
f73dda09 | 282 | int sublen; |
a0c0a00f | 283 | SHELL_VAR *entry, *nv; |
f73dda09 JA |
284 | |
285 | vname = array_variable_name (name, &sub, &sublen); | |
286 | ||
287 | if (vname == 0) | |
288 | return ((SHELL_VAR *)NULL); | |
289 | ||
290 | if ((ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']') || (sublen <= 1)) | |
291 | { | |
292 | free (vname); | |
7117c2d2 | 293 | err_badarraysub (name); |
f73dda09 JA |
294 | return ((SHELL_VAR *)NULL); |
295 | } | |
296 | ||
3185942a | 297 | entry = find_variable (vname); |
ac50fbac CR |
298 | entry = assign_array_element_internal (entry, name, vname, sub, sublen, value, flags); |
299 | ||
300 | free (vname); | |
301 | return entry; | |
302 | } | |
303 | ||
304 | static SHELL_VAR * | |
305 | assign_array_element_internal (entry, name, vname, sub, sublen, value, flags) | |
306 | SHELL_VAR *entry; | |
307 | char *name; /* only used for error messages */ | |
308 | char *vname; | |
309 | char *sub; | |
310 | int sublen; | |
311 | char *value; | |
312 | int flags; | |
313 | { | |
314 | char *akey; | |
315 | arrayind_t ind; | |
3185942a JA |
316 | |
317 | if (entry && assoc_p (entry)) | |
f73dda09 | 318 | { |
3185942a JA |
319 | sub[sublen-1] = '\0'; |
320 | akey = expand_assignment_string_to_string (sub, 0); /* [ */ | |
321 | sub[sublen-1] = ']'; | |
322 | if (akey == 0 || *akey == 0) | |
323 | { | |
3185942a | 324 | err_badarraysub (name); |
ac50fbac | 325 | FREE (akey); |
3185942a JA |
326 | return ((SHELL_VAR *)NULL); |
327 | } | |
328 | entry = bind_assoc_variable (entry, vname, akey, value, flags); | |
329 | } | |
330 | else | |
331 | { | |
ac50fbac CR |
332 | ind = array_expand_index (entry, sub, sublen); |
333 | /* negative subscripts to indexed arrays count back from end */ | |
334 | if (entry && ind < 0) | |
335 | ind = (array_p (entry) ? array_max_index (array_cell (entry)) : 0) + 1 + ind; | |
3185942a JA |
336 | if (ind < 0) |
337 | { | |
3185942a JA |
338 | err_badarraysub (name); |
339 | return ((SHELL_VAR *)NULL); | |
340 | } | |
341 | entry = bind_array_variable (vname, ind, value, flags); | |
f73dda09 | 342 | } |
f73dda09 | 343 | |
f73dda09 JA |
344 | return (entry); |
345 | } | |
346 | ||
347 | /* Find the array variable corresponding to NAME. If there is no variable, | |
348 | create a new array variable. If the variable exists but is not an array, | |
3185942a | 349 | convert it to an indexed array. If FLAGS&1 is non-zero, an existing |
f73dda09 | 350 | variable is checked for the readonly or noassign attribute in preparation |
3185942a JA |
351 | for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we |
352 | create an associative array. */ | |
f73dda09 | 353 | SHELL_VAR * |
3185942a | 354 | find_or_make_array_variable (name, flags) |
f73dda09 | 355 | char *name; |
3185942a | 356 | int flags; |
f73dda09 JA |
357 | { |
358 | SHELL_VAR *var; | |
359 | ||
360 | var = find_variable (name); | |
ac50fbac CR |
361 | if (var == 0) |
362 | { | |
363 | /* See if we have a nameref pointing to a variable that hasn't been | |
364 | created yet. */ | |
a0c0a00f CR |
365 | var = find_variable_last_nameref (name, 1); |
366 | if (var && nameref_p (var) && invisible_p (var)) | |
367 | { | |
368 | internal_warning (_("%s: removing nameref attribute"), name); | |
369 | VUNSETATTR (var, att_nameref); | |
370 | } | |
ac50fbac | 371 | if (var && nameref_p (var)) |
a0c0a00f CR |
372 | { |
373 | if (valid_nameref_value (nameref_cell (var), 2) == 0) | |
374 | { | |
375 | sh_invalidid (nameref_cell (var)); | |
376 | return ((SHELL_VAR *)NULL); | |
377 | } | |
378 | var = (flags & 2) ? make_new_assoc_variable (nameref_cell (var)) : make_new_array_variable (nameref_cell (var)); | |
379 | } | |
ac50fbac | 380 | } |
f73dda09 JA |
381 | |
382 | if (var == 0) | |
3185942a JA |
383 | var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name); |
384 | else if ((flags & 1) && (readonly_p (var) || noassign_p (var))) | |
f73dda09 JA |
385 | { |
386 | if (readonly_p (var)) | |
7117c2d2 | 387 | err_readonly (name); |
f73dda09 JA |
388 | return ((SHELL_VAR *)NULL); |
389 | } | |
3185942a JA |
390 | else if ((flags & 2) && array_p (var)) |
391 | { | |
ac50fbac | 392 | last_command_exit_value = 1; |
3185942a JA |
393 | report_error (_("%s: cannot convert indexed to associative array"), name); |
394 | return ((SHELL_VAR *)NULL); | |
395 | } | |
396 | else if (array_p (var) == 0 && assoc_p (var) == 0) | |
f73dda09 JA |
397 | var = convert_var_to_array (var); |
398 | ||
399 | return (var); | |
400 | } | |
401 | ||
402 | /* Perform a compound assignment statement for array NAME, where VALUE is | |
403 | the text between the parens: NAME=( VALUE ) */ | |
404 | SHELL_VAR * | |
95732b49 | 405 | assign_array_from_string (name, value, flags) |
f73dda09 | 406 | char *name, *value; |
95732b49 | 407 | int flags; |
f73dda09 JA |
408 | { |
409 | SHELL_VAR *var; | |
3185942a | 410 | int vflags; |
f73dda09 | 411 | |
3185942a JA |
412 | vflags = 1; |
413 | if (flags & ASS_MKASSOC) | |
414 | vflags |= 2; | |
415 | ||
416 | var = find_or_make_array_variable (name, vflags); | |
f73dda09 JA |
417 | if (var == 0) |
418 | return ((SHELL_VAR *)NULL); | |
419 | ||
95732b49 | 420 | return (assign_array_var_from_string (var, value, flags)); |
f73dda09 JA |
421 | } |
422 | ||
423 | /* Sequentially assign the indices of indexed array variable VAR from the | |
424 | words in LIST. */ | |
425 | SHELL_VAR * | |
95732b49 | 426 | assign_array_var_from_word_list (var, list, flags) |
f73dda09 JA |
427 | SHELL_VAR *var; |
428 | WORD_LIST *list; | |
95732b49 | 429 | int flags; |
f73dda09 JA |
430 | { |
431 | register arrayind_t i; | |
432 | register WORD_LIST *l; | |
433 | ARRAY *a; | |
434 | ||
95732b49 JA |
435 | a = array_cell (var); |
436 | i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0; | |
437 | ||
438 | for (l = list; l; l = l->next, i++) | |
a0c0a00f | 439 | bind_array_var_internal (var, i, 0, l->word->word, flags & ~ASS_APPEND); |
d2744e05 CR |
440 | |
441 | VUNSETATTR (var, att_invisible); /* no longer invisible */ | |
442 | ||
f73dda09 JA |
443 | return var; |
444 | } | |
445 | ||
0628567a | 446 | WORD_LIST * |
3185942a JA |
447 | expand_compound_array_assignment (var, value, flags) |
448 | SHELL_VAR *var; | |
f73dda09 | 449 | char *value; |
95732b49 | 450 | int flags; |
f73dda09 | 451 | { |
f73dda09 | 452 | WORD_LIST *list, *nlist; |
ac50fbac | 453 | WORD_LIST *hd, *tl, *t, *n; |
0628567a JA |
454 | char *val; |
455 | int ni; | |
f73dda09 | 456 | |
ac50fbac CR |
457 | /* This condition is true when invoked from the declare builtin with a |
458 | command like | |
459 | declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")' */ | |
f73dda09 JA |
460 | if (*value == '(') /*)*/ |
461 | { | |
462 | ni = 1; | |
463 | val = extract_array_assignment_list (value, &ni); | |
464 | if (val == 0) | |
0628567a | 465 | return (WORD_LIST *)NULL; |
f73dda09 JA |
466 | } |
467 | else | |
468 | val = value; | |
469 | ||
470 | /* Expand the value string into a list of words, performing all the | |
471 | shell expansions including pathname generation and word splitting. */ | |
472 | /* First we split the string on whitespace, using the shell parser | |
473 | (ksh93 seems to do this). */ | |
b80f6443 | 474 | list = parse_string_to_word_list (val, 1, "array assign"); |
f73dda09 | 475 | |
ac50fbac CR |
476 | if (var && assoc_p (var)) |
477 | { | |
478 | if (val != value) | |
479 | free (val); | |
480 | return list; | |
481 | } | |
482 | ||
f73dda09 | 483 | /* If we're using [subscript]=value, we need to quote each [ and ] to |
ac50fbac CR |
484 | prevent unwanted filename expansion. This doesn't need to be done |
485 | for associative array expansion, since that uses a different expansion | |
486 | function (see assign_compound_array_list below). */ | |
f73dda09 JA |
487 | if (list) |
488 | quote_array_assignment_chars (list); | |
489 | ||
490 | /* Now that we've split it, perform the shell expansions on each | |
491 | word in the list. */ | |
492 | nlist = list ? expand_words_no_vars (list) : (WORD_LIST *)NULL; | |
493 | ||
494 | dispose_words (list); | |
495 | ||
496 | if (val != value) | |
497 | free (val); | |
498 | ||
0628567a JA |
499 | return nlist; |
500 | } | |
501 | ||
0001803f | 502 | /* Callers ensure that VAR is not NULL */ |
0628567a JA |
503 | void |
504 | assign_compound_array_list (var, nlist, flags) | |
505 | SHELL_VAR *var; | |
506 | WORD_LIST *nlist; | |
507 | int flags; | |
508 | { | |
509 | ARRAY *a; | |
3185942a | 510 | HASH_TABLE *h; |
0628567a | 511 | WORD_LIST *list; |
a0c0a00f | 512 | char *w, *val, *nval, *savecmd; |
ac50fbac | 513 | int len, iflags, free_val; |
0628567a | 514 | arrayind_t ind, last_ind; |
3185942a | 515 | char *akey; |
0628567a | 516 | |
3185942a JA |
517 | a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0; |
518 | h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0; | |
519 | ||
520 | akey = (char *)0; | |
521 | ind = 0; | |
f73dda09 JA |
522 | |
523 | /* Now that we are ready to assign values to the array, kill the existing | |
524 | value. */ | |
3185942a JA |
525 | if ((flags & ASS_APPEND) == 0) |
526 | { | |
0001803f | 527 | if (a && array_p (var)) |
3185942a | 528 | array_flush (a); |
0001803f | 529 | else if (h && assoc_p (var)) |
3185942a JA |
530 | assoc_flush (h); |
531 | } | |
532 | ||
533 | last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0; | |
f73dda09 | 534 | |
95732b49 | 535 | for (list = nlist; list; list = list->next) |
f73dda09 | 536 | { |
a0c0a00f CR |
537 | /* Don't allow var+=(values) to make assignments in VALUES append to |
538 | existing values by default. */ | |
539 | iflags = flags & ~ASS_APPEND; | |
f73dda09 JA |
540 | w = list->word->word; |
541 | ||
542 | /* We have a word of the form [ind]=value */ | |
b80f6443 | 543 | if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[') |
f73dda09 | 544 | { |
ac50fbac CR |
545 | /* Don't have to handle embedded quotes specially any more, since |
546 | associative array subscripts have not been expanded yet (see | |
547 | above). */ | |
548 | len = skipsubscript (w, 0, 0); | |
f73dda09 | 549 | |
95732b49 JA |
550 | /* XXX - changes for `+=' */ |
551 | if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '='))) | |
f73dda09 | 552 | { |
3185942a JA |
553 | if (assoc_p (var)) |
554 | { | |
555 | err_badarraysub (w); | |
556 | continue; | |
557 | } | |
95732b49 | 558 | nval = make_variable_value (var, w, flags); |
f73dda09 | 559 | if (var->assign_func) |
3185942a | 560 | (*var->assign_func) (var, nval, last_ind, 0); |
f73dda09 | 561 | else |
7117c2d2 | 562 | array_insert (a, last_ind, nval); |
f73dda09 JA |
563 | FREE (nval); |
564 | last_ind++; | |
565 | continue; | |
566 | } | |
567 | ||
568 | if (len == 1) | |
569 | { | |
7117c2d2 | 570 | err_badarraysub (w); |
f73dda09 JA |
571 | continue; |
572 | } | |
573 | ||
574 | if (ALL_ELEMENT_SUB (w[1]) && len == 2) | |
575 | { | |
ac50fbac | 576 | last_command_exit_value = 1; |
3185942a JA |
577 | if (assoc_p (var)) |
578 | report_error (_("%s: invalid associative array key"), w); | |
579 | else | |
580 | report_error (_("%s: cannot assign to non-numeric index"), w); | |
f73dda09 JA |
581 | continue; |
582 | } | |
583 | ||
3185942a | 584 | if (array_p (var)) |
f73dda09 | 585 | { |
ac50fbac CR |
586 | ind = array_expand_index (var, w + 1, len); |
587 | /* negative subscripts to indexed arrays count back from end */ | |
588 | if (ind < 0) | |
589 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
3185942a JA |
590 | if (ind < 0) |
591 | { | |
592 | err_badarraysub (w); | |
593 | continue; | |
594 | } | |
595 | ||
596 | last_ind = ind; | |
f73dda09 | 597 | } |
3185942a JA |
598 | else if (assoc_p (var)) |
599 | { | |
ac50fbac CR |
600 | /* This is not performed above, see expand_compound_array_assignment */ |
601 | w[len] = '\0'; /*[*/ | |
602 | akey = expand_assignment_string_to_string (w+1, 0); | |
603 | w[len] = ']'; | |
604 | /* And we need to expand the value also, see below */ | |
3185942a JA |
605 | if (akey == 0 || *akey == 0) |
606 | { | |
607 | err_badarraysub (w); | |
ac50fbac | 608 | FREE (akey); |
3185942a JA |
609 | continue; |
610 | } | |
611 | } | |
612 | ||
0628567a | 613 | /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */ |
95732b49 JA |
614 | if (w[len + 1] == '+' && w[len + 2] == '=') |
615 | { | |
0628567a | 616 | iflags |= ASS_APPEND; |
95732b49 JA |
617 | val = w + len + 3; |
618 | } | |
619 | else | |
ac50fbac | 620 | val = w + len + 2; |
f73dda09 | 621 | } |
3185942a JA |
622 | else if (assoc_p (var)) |
623 | { | |
ac50fbac | 624 | last_command_exit_value = 1; |
3185942a JA |
625 | report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w); |
626 | continue; | |
627 | } | |
f73dda09 JA |
628 | else /* No [ind]=value, just a stray `=' */ |
629 | { | |
630 | ind = last_ind; | |
631 | val = w; | |
632 | } | |
633 | ||
ac50fbac CR |
634 | free_val = 0; |
635 | /* See above; we need to expand the value here */ | |
636 | if (assoc_p (var)) | |
637 | { | |
638 | val = expand_assignment_string_to_string (val, 0); | |
01657c64 CR |
639 | if (val == 0) |
640 | { | |
641 | val = (char *)xmalloc (1); | |
642 | val[0] = '\0'; /* like do_assignment_internal */ | |
643 | } | |
ac50fbac CR |
644 | free_val = 1; |
645 | } | |
646 | ||
a0c0a00f | 647 | savecmd = this_command_name; |
f73dda09 JA |
648 | if (integer_p (var)) |
649 | this_command_name = (char *)NULL; /* no command name for errors */ | |
3185942a | 650 | bind_array_var_internal (var, ind, akey, val, iflags); |
f73dda09 | 651 | last_ind++; |
a0c0a00f | 652 | this_command_name = savecmd; |
ac50fbac CR |
653 | |
654 | if (free_val) | |
655 | free (val); | |
f73dda09 | 656 | } |
0628567a | 657 | } |
f73dda09 | 658 | |
0628567a JA |
659 | /* Perform a compound array assignment: VAR->name=( VALUE ). The |
660 | VALUE has already had the parentheses stripped. */ | |
661 | SHELL_VAR * | |
662 | assign_array_var_from_string (var, value, flags) | |
663 | SHELL_VAR *var; | |
664 | char *value; | |
665 | int flags; | |
666 | { | |
667 | WORD_LIST *nlist; | |
668 | ||
669 | if (value == 0) | |
670 | return var; | |
671 | ||
3185942a | 672 | nlist = expand_compound_array_assignment (var, value, flags); |
0628567a JA |
673 | assign_compound_array_list (var, nlist, flags); |
674 | ||
675 | if (nlist) | |
676 | dispose_words (nlist); | |
d2744e05 CR |
677 | |
678 | if (var) | |
679 | VUNSETATTR (var, att_invisible); /* no longer invisible */ | |
680 | ||
f73dda09 JA |
681 | return (var); |
682 | } | |
683 | ||
3185942a JA |
684 | /* Quote globbing chars and characters in $IFS before the `=' in an assignment |
685 | statement (usually a compound array assignment) to protect them from | |
686 | unwanted filename expansion or word splitting. */ | |
687 | static char * | |
688 | quote_assign (string) | |
689 | const char *string; | |
690 | { | |
691 | size_t slen; | |
692 | int saw_eq; | |
0001803f | 693 | char *temp, *t, *subs; |
3185942a | 694 | const char *s, *send; |
0001803f | 695 | int ss, se; |
3185942a JA |
696 | DECLARE_MBSTATE; |
697 | ||
698 | slen = strlen (string); | |
699 | send = string + slen; | |
700 | ||
701 | t = temp = (char *)xmalloc (slen * 2 + 1); | |
702 | saw_eq = 0; | |
703 | for (s = string; *s; ) | |
704 | { | |
705 | if (*s == '=') | |
706 | saw_eq = 1; | |
0001803f CR |
707 | if (saw_eq == 0 && *s == '[') /* looks like a subscript */ |
708 | { | |
709 | ss = s - string; | |
710 | se = skipsubscript (string, ss, 0); | |
711 | subs = substring (s, ss, se); | |
712 | *t++ = '\\'; | |
713 | strcpy (t, subs); | |
714 | t += se - ss; | |
715 | *t++ = '\\'; | |
716 | *t++ = ']'; | |
717 | s += se + 1; | |
718 | free (subs); | |
719 | continue; | |
720 | } | |
3185942a JA |
721 | if (saw_eq == 0 && (glob_char_p (s) || isifs (*s))) |
722 | *t++ = '\\'; | |
723 | ||
724 | COPY_CHAR_P (t, s, send); | |
725 | } | |
726 | *t = '\0'; | |
727 | return temp; | |
728 | } | |
729 | ||
f73dda09 | 730 | /* For each word in a compound array assignment, if the word looks like |
3185942a | 731 | [ind]=value, quote globbing chars and characters in $IFS before the `='. */ |
f73dda09 JA |
732 | static void |
733 | quote_array_assignment_chars (list) | |
734 | WORD_LIST *list; | |
735 | { | |
3185942a | 736 | char *nword; |
f73dda09 JA |
737 | WORD_LIST *l; |
738 | ||
739 | for (l = list; l; l = l->next) | |
740 | { | |
741 | if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0') | |
742 | continue; /* should not happen, but just in case... */ | |
ac50fbac CR |
743 | /* Don't bother if it hasn't been recognized as an assignment or |
744 | doesn't look like [ind]=value */ | |
745 | if ((l->word->flags & W_ASSIGNMENT) == 0) | |
746 | continue; | |
0001803f | 747 | if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */ |
f73dda09 | 748 | continue; |
ac50fbac | 749 | |
3185942a | 750 | nword = quote_assign (l->word->word); |
f73dda09 JA |
751 | free (l->word->word); |
752 | l->word->word = nword; | |
ac50fbac | 753 | l->word->flags |= W_NOGLOB; /* XXX - W_NOSPLIT also? */ |
f73dda09 JA |
754 | } |
755 | } | |
756 | ||
89a92869 | 757 | /* skipsubscript moved to subst.c to use private functions. 2009/02/24. */ |
f73dda09 JA |
758 | |
759 | /* This function is called with SUB pointing to just after the beginning | |
760 | `[' of an array subscript and removes the array element to which SUB | |
761 | expands from array VAR. A subscript of `*' or `@' unsets the array. */ | |
762 | int | |
763 | unbind_array_element (var, sub) | |
764 | SHELL_VAR *var; | |
765 | char *sub; | |
766 | { | |
767 | int len; | |
768 | arrayind_t ind; | |
3185942a | 769 | char *akey; |
f73dda09 JA |
770 | ARRAY_ELEMENT *ae; |
771 | ||
a0c0a00f | 772 | len = skipsubscript (sub, 0, (var && assoc_p(var))); |
f73dda09 JA |
773 | if (sub[len] != ']' || len == 0) |
774 | { | |
b80f6443 | 775 | builtin_error ("%s[%s: %s", var->name, sub, _(bash_badsub_errmsg)); |
f73dda09 JA |
776 | return -1; |
777 | } | |
778 | sub[len] = '\0'; | |
779 | ||
780 | if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0) | |
781 | { | |
a0c0a00f CR |
782 | if (array_p (var) || assoc_p (var)) |
783 | { | |
784 | unbind_variable (var->name); /* XXX -- {array,assoc}_flush ? */ | |
785 | return (0); | |
786 | } | |
787 | else | |
788 | return -2; /* don't allow this to unset scalar variables */ | |
f73dda09 | 789 | } |
3185942a JA |
790 | |
791 | if (assoc_p (var)) | |
f73dda09 | 792 | { |
3185942a JA |
793 | akey = expand_assignment_string_to_string (sub, 0); /* [ */ |
794 | if (akey == 0 || *akey == 0) | |
795 | { | |
796 | builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg)); | |
ac50fbac | 797 | FREE (akey); |
3185942a JA |
798 | return -1; |
799 | } | |
800 | assoc_remove (assoc_cell (var), akey); | |
495aee44 | 801 | free (akey); |
3185942a | 802 | } |
a0c0a00f | 803 | else if (array_p (var)) |
3185942a | 804 | { |
ac50fbac CR |
805 | ind = array_expand_index (var, sub, len+1); |
806 | /* negative subscripts to indexed arrays count back from end */ | |
807 | if (ind < 0) | |
808 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
3185942a JA |
809 | if (ind < 0) |
810 | { | |
811 | builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg)); | |
812 | return -1; | |
813 | } | |
814 | ae = array_remove (array_cell (var), ind); | |
815 | if (ae) | |
816 | array_dispose_element (ae); | |
f73dda09 | 817 | } |
a0c0a00f CR |
818 | else /* array_p (var) == 0 && assoc_p (var) == 0 */ |
819 | { | |
820 | akey = this_command_name; | |
821 | ind = array_expand_index (var, sub, len+1); | |
822 | this_command_name = akey; | |
823 | if (ind == 0) | |
824 | { | |
825 | unbind_variable (var->name); | |
826 | return (0); | |
827 | } | |
828 | else | |
829 | return -2; /* any subscript other than 0 is invalid with scalar variables */ | |
830 | } | |
3185942a | 831 | |
f73dda09 JA |
832 | return 0; |
833 | } | |
834 | ||
835 | /* Format and output an array assignment in compound form VAR=(VALUES), | |
836 | suitable for re-use as input. */ | |
837 | void | |
838 | print_array_assignment (var, quoted) | |
839 | SHELL_VAR *var; | |
840 | int quoted; | |
841 | { | |
842 | char *vstr; | |
843 | ||
7117c2d2 | 844 | vstr = array_to_assign (array_cell (var), quoted); |
f73dda09 JA |
845 | |
846 | if (vstr == 0) | |
847 | printf ("%s=%s\n", var->name, quoted ? "'()'" : "()"); | |
848 | else | |
849 | { | |
850 | printf ("%s=%s\n", var->name, vstr); | |
851 | free (vstr); | |
852 | } | |
853 | } | |
854 | ||
3185942a JA |
855 | /* Format and output an associative array assignment in compound form |
856 | VAR=(VALUES), suitable for re-use as input. */ | |
857 | void | |
858 | print_assoc_assignment (var, quoted) | |
859 | SHELL_VAR *var; | |
860 | int quoted; | |
861 | { | |
862 | char *vstr; | |
863 | ||
864 | vstr = assoc_to_assign (assoc_cell (var), quoted); | |
865 | ||
866 | if (vstr == 0) | |
867 | printf ("%s=%s\n", var->name, quoted ? "'()'" : "()"); | |
868 | else | |
869 | { | |
870 | printf ("%s=%s\n", var->name, vstr); | |
871 | free (vstr); | |
872 | } | |
873 | } | |
874 | ||
f73dda09 JA |
875 | /***********************************************************************/ |
876 | /* */ | |
877 | /* Utility functions to manage arrays and their contents for expansion */ | |
878 | /* */ | |
879 | /***********************************************************************/ | |
880 | ||
881 | /* Return 1 if NAME is a properly-formed array reference v[sub]. */ | |
882 | int | |
a0c0a00f CR |
883 | valid_array_reference (name, flags) |
884 | const char *name; | |
885 | int flags; | |
f73dda09 JA |
886 | { |
887 | char *t; | |
888 | int r, len; | |
889 | ||
0001803f | 890 | t = mbschr (name, '['); /* ] */ |
f73dda09 JA |
891 | if (t) |
892 | { | |
893 | *t = '\0'; | |
894 | r = legal_identifier (name); | |
895 | *t = '['; | |
896 | if (r == 0) | |
897 | return 0; | |
898 | /* Check for a properly-terminated non-blank subscript. */ | |
0001803f | 899 | len = skipsubscript (t, 0, 0); |
f73dda09 JA |
900 | if (t[len] != ']' || len == 1) |
901 | return 0; | |
a0c0a00f CR |
902 | if (t[len+1] != '\0') |
903 | return 0; | |
f73dda09 JA |
904 | for (r = 1; r < len; r++) |
905 | if (whitespace (t[r]) == 0) | |
906 | return 1; | |
907 | return 0; | |
908 | } | |
909 | return 0; | |
910 | } | |
911 | ||
912 | /* Expand the array index beginning at S and extending LEN characters. */ | |
913 | arrayind_t | |
ac50fbac CR |
914 | array_expand_index (var, s, len) |
915 | SHELL_VAR *var; | |
f73dda09 JA |
916 | char *s; |
917 | int len; | |
918 | { | |
a0c0a00f | 919 | char *exp, *t, *savecmd; |
f73dda09 JA |
920 | int expok; |
921 | arrayind_t val; | |
922 | ||
923 | exp = (char *)xmalloc (len); | |
924 | strncpy (exp, s, len - 1); | |
925 | exp[len - 1] = '\0'; | |
a0c0a00f CR |
926 | t = expand_arith_string (exp, Q_DOUBLE_QUOTES|Q_ARITH|Q_ARRAYSUB); /* XXX - Q_ARRAYSUB for future use */ |
927 | savecmd = this_command_name; | |
f73dda09 JA |
928 | this_command_name = (char *)NULL; |
929 | val = evalexp (t, &expok); | |
a0c0a00f | 930 | this_command_name = savecmd; |
f73dda09 JA |
931 | free (t); |
932 | free (exp); | |
933 | if (expok == 0) | |
934 | { | |
935 | last_command_exit_value = EXECUTION_FAILURE; | |
f1be666c | 936 | |
a0c0a00f CR |
937 | if (no_longjmp_on_fatal_error) |
938 | return 0; | |
f1be666c | 939 | top_level_cleanup (); |
f73dda09 JA |
940 | jump_to_top_level (DISCARD); |
941 | } | |
942 | return val; | |
943 | } | |
944 | ||
945 | /* Return the name of the variable specified by S without any subscript. | |
946 | If SUBP is non-null, return a pointer to the start of the subscript | |
947 | in *SUBP. If LENP is non-null, the length of the subscript is returned | |
948 | in *LENP. This returns newly-allocated memory. */ | |
949 | char * | |
950 | array_variable_name (s, subp, lenp) | |
a0c0a00f CR |
951 | const char *s; |
952 | char **subp; | |
f73dda09 JA |
953 | int *lenp; |
954 | { | |
955 | char *t, *ret; | |
956 | int ind, ni; | |
957 | ||
0001803f | 958 | t = mbschr (s, '['); |
f73dda09 | 959 | if (t == 0) |
b80f6443 JA |
960 | { |
961 | if (subp) | |
962 | *subp = t; | |
963 | if (lenp) | |
964 | *lenp = 0; | |
965 | return ((char *)NULL); | |
966 | } | |
f73dda09 | 967 | ind = t - s; |
0001803f | 968 | ni = skipsubscript (s, ind, 0); |
f73dda09 JA |
969 | if (ni <= ind + 1 || s[ni] != ']') |
970 | { | |
7117c2d2 | 971 | err_badarraysub (s); |
b80f6443 JA |
972 | if (subp) |
973 | *subp = t; | |
974 | if (lenp) | |
975 | *lenp = 0; | |
f73dda09 JA |
976 | return ((char *)NULL); |
977 | } | |
978 | ||
979 | *t = '\0'; | |
980 | ret = savestring (s); | |
981 | *t++ = '['; /* ] */ | |
982 | ||
983 | if (subp) | |
984 | *subp = t; | |
985 | if (lenp) | |
986 | *lenp = ni - ind; | |
987 | ||
988 | return ret; | |
989 | } | |
990 | ||
991 | /* Return the variable specified by S without any subscript. If SUBP is | |
992 | non-null, return a pointer to the start of the subscript in *SUBP. | |
993 | If LENP is non-null, the length of the subscript is returned in *LENP. */ | |
994 | SHELL_VAR * | |
995 | array_variable_part (s, subp, lenp) | |
a0c0a00f CR |
996 | const char *s; |
997 | char **subp; | |
f73dda09 JA |
998 | int *lenp; |
999 | { | |
1000 | char *t; | |
1001 | SHELL_VAR *var; | |
1002 | ||
1003 | t = array_variable_name (s, subp, lenp); | |
1004 | if (t == 0) | |
1005 | return ((SHELL_VAR *)NULL); | |
a0c0a00f | 1006 | var = find_variable (t); /* XXX - handle namerefs here? */ |
f73dda09 JA |
1007 | |
1008 | free (t); | |
ac50fbac | 1009 | return var; /* now return invisible variables; caller must handle */ |
f73dda09 JA |
1010 | } |
1011 | ||
495aee44 CR |
1012 | #define INDEX_ERROR() \ |
1013 | do \ | |
1014 | { \ | |
1015 | if (var) \ | |
1016 | err_badarraysub (var->name); \ | |
1017 | else \ | |
1018 | { \ | |
1019 | t[-1] = '\0'; \ | |
1020 | err_badarraysub (s); \ | |
1021 | t[-1] = '['; /* ] */\ | |
1022 | } \ | |
1023 | return ((char *)NULL); \ | |
1024 | } \ | |
1025 | while (0) | |
1026 | ||
f73dda09 JA |
1027 | /* Return a string containing the elements in the array and subscript |
1028 | described by S. If the subscript is * or @, obeys quoting rules akin | |
7117c2d2 | 1029 | to the expansion of $* and $@ including double quoting. If RTYPE |
3185942a JA |
1030 | is non-null it gets 1 if the array reference is name[*], 2 if the |
1031 | reference is name[@], and 0 otherwise. */ | |
f73dda09 | 1032 | static char * |
495aee44 | 1033 | array_value_internal (s, quoted, flags, rtype, indp) |
a0c0a00f | 1034 | const char *s; |
495aee44 CR |
1035 | int quoted, flags, *rtype; |
1036 | arrayind_t *indp; | |
f73dda09 JA |
1037 | { |
1038 | int len; | |
1039 | arrayind_t ind; | |
3185942a | 1040 | char *akey; |
f73dda09 JA |
1041 | char *retval, *t, *temp; |
1042 | WORD_LIST *l; | |
1043 | SHELL_VAR *var; | |
1044 | ||
1045 | var = array_variable_part (s, &t, &len); | |
1046 | ||
7117c2d2 JA |
1047 | /* Expand the index, even if the variable doesn't exist, in case side |
1048 | effects are needed, like ${w[i++]} where w is unset. */ | |
1049 | #if 0 | |
f73dda09 JA |
1050 | if (var == 0) |
1051 | return (char *)NULL; | |
7117c2d2 | 1052 | #endif |
f73dda09 | 1053 | |
b80f6443 JA |
1054 | if (len == 0) |
1055 | return ((char *)NULL); /* error message already printed */ | |
1056 | ||
f73dda09 | 1057 | /* [ */ |
ac50fbac | 1058 | akey = 0; |
f73dda09 JA |
1059 | if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']') |
1060 | { | |
7117c2d2 | 1061 | if (rtype) |
f1be666c | 1062 | *rtype = (t[0] == '*') ? 1 : 2; |
495aee44 | 1063 | if ((flags & AV_ALLOWALL) == 0) |
f73dda09 | 1064 | { |
7117c2d2 | 1065 | err_badarraysub (s); |
f73dda09 JA |
1066 | return ((char *)NULL); |
1067 | } | |
495aee44 | 1068 | else if (var == 0 || value_cell (var) == 0) /* XXX - check for invisible_p(var) ? */ |
7117c2d2 | 1069 | return ((char *)NULL); |
3185942a | 1070 | else if (array_p (var) == 0 && assoc_p (var) == 0) |
7117c2d2 | 1071 | l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL); |
3185942a JA |
1072 | else if (assoc_p (var)) |
1073 | { | |
1074 | l = assoc_to_word_list (assoc_cell (var)); | |
1075 | if (l == (WORD_LIST *)NULL) | |
1076 | return ((char *)NULL); | |
1077 | } | |
f73dda09 JA |
1078 | else |
1079 | { | |
1080 | l = array_to_word_list (array_cell (var)); | |
1081 | if (l == (WORD_LIST *)NULL) | |
1082 | return ((char *) NULL); | |
1083 | } | |
1084 | ||
1085 | if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
1086 | { | |
1087 | temp = string_list_dollar_star (l); | |
ac50fbac | 1088 | retval = quote_string (temp); /* XXX - leak here */ |
f73dda09 JA |
1089 | free (temp); |
1090 | } | |
1091 | else /* ${name[@]} or unquoted ${name[*]} */ | |
a0c0a00f CR |
1092 | /* XXX - bash-4.4/bash-5.0 test AV_ASSIGNRHS and pass PF_ASSIGNRHS */ |
1093 | retval = string_list_dollar_at (l, quoted, (flags & AV_ASSIGNRHS) ? PF_ASSIGNRHS : 0); /* XXX - leak here */ | |
f73dda09 JA |
1094 | |
1095 | dispose_words (l); | |
1096 | } | |
1097 | else | |
1098 | { | |
7117c2d2 JA |
1099 | if (rtype) |
1100 | *rtype = 0; | |
3185942a | 1101 | if (var == 0 || array_p (var) || assoc_p (var) == 0) |
f73dda09 | 1102 | { |
495aee44 | 1103 | if ((flags & AV_USEIND) == 0 || indp == 0) |
7117c2d2 | 1104 | { |
ac50fbac | 1105 | ind = array_expand_index (var, t, len); |
495aee44 | 1106 | if (ind < 0) |
3185942a | 1107 | { |
495aee44 CR |
1108 | /* negative subscripts to indexed arrays count back from end */ |
1109 | if (var && array_p (var)) | |
1110 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
1111 | if (ind < 0) | |
1112 | INDEX_ERROR(); | |
3185942a | 1113 | } |
495aee44 CR |
1114 | if (indp) |
1115 | *indp = ind; | |
7117c2d2 | 1116 | } |
495aee44 CR |
1117 | else if (indp) |
1118 | ind = *indp; | |
f73dda09 | 1119 | } |
3185942a JA |
1120 | else if (assoc_p (var)) |
1121 | { | |
1122 | t[len - 1] = '\0'; | |
1123 | akey = expand_assignment_string_to_string (t, 0); /* [ */ | |
1124 | t[len - 1] = ']'; | |
1125 | if (akey == 0 || *akey == 0) | |
ac50fbac CR |
1126 | { |
1127 | FREE (akey); | |
1128 | INDEX_ERROR(); | |
1129 | } | |
3185942a JA |
1130 | } |
1131 | ||
495aee44 | 1132 | if (var == 0 || value_cell (var) == 0) /* XXX - check invisible_p(var) ? */ |
ac50fbac CR |
1133 | { |
1134 | FREE (akey); | |
1135 | return ((char *)NULL); | |
1136 | } | |
3185942a | 1137 | if (array_p (var) == 0 && assoc_p (var) == 0) |
7117c2d2 | 1138 | return (ind == 0 ? value_cell (var) : (char *)NULL); |
3185942a | 1139 | else if (assoc_p (var)) |
495aee44 CR |
1140 | { |
1141 | retval = assoc_reference (assoc_cell (var), akey); | |
1142 | free (akey); | |
1143 | } | |
3185942a JA |
1144 | else |
1145 | retval = array_reference (array_cell (var), ind); | |
f73dda09 JA |
1146 | } |
1147 | ||
1148 | return retval; | |
1149 | } | |
1150 | ||
1151 | /* Return a string containing the elements described by the array and | |
1152 | subscript contained in S, obeying quoting for subscripts * and @. */ | |
1153 | char * | |
495aee44 | 1154 | array_value (s, quoted, flags, rtype, indp) |
a0c0a00f | 1155 | const char *s; |
495aee44 CR |
1156 | int quoted, flags, *rtype; |
1157 | arrayind_t *indp; | |
f73dda09 | 1158 | { |
495aee44 | 1159 | return (array_value_internal (s, quoted, flags|AV_ALLOWALL, rtype, indp)); |
f73dda09 JA |
1160 | } |
1161 | ||
1162 | /* Return the value of the array indexing expression S as a single string. | |
495aee44 CR |
1163 | If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This |
1164 | is used by other parts of the shell such as the arithmetic expression | |
1165 | evaluator in expr.c. */ | |
f73dda09 | 1166 | char * |
495aee44 | 1167 | get_array_value (s, flags, rtype, indp) |
a0c0a00f | 1168 | const char *s; |
495aee44 CR |
1169 | int flags, *rtype; |
1170 | arrayind_t *indp; | |
f73dda09 | 1171 | { |
495aee44 | 1172 | return (array_value_internal (s, 0, flags, rtype, indp)); |
f73dda09 JA |
1173 | } |
1174 | ||
b80f6443 JA |
1175 | char * |
1176 | array_keys (s, quoted) | |
1177 | char *s; | |
1178 | int quoted; | |
1179 | { | |
1180 | int len; | |
1181 | char *retval, *t, *temp; | |
1182 | WORD_LIST *l; | |
1183 | SHELL_VAR *var; | |
1184 | ||
1185 | var = array_variable_part (s, &t, &len); | |
1186 | ||
1187 | /* [ */ | |
1188 | if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']') | |
1189 | return (char *)NULL; | |
1190 | ||
495aee44 CR |
1191 | if (var_isset (var) == 0 || invisible_p (var)) |
1192 | return (char *)NULL; | |
1193 | ||
3185942a | 1194 | if (array_p (var) == 0 && assoc_p (var) == 0) |
b80f6443 | 1195 | l = add_string_to_list ("0", (WORD_LIST *)NULL); |
3185942a JA |
1196 | else if (assoc_p (var)) |
1197 | l = assoc_keys_to_word_list (assoc_cell (var)); | |
b80f6443 | 1198 | else |
3185942a JA |
1199 | l = array_keys_to_word_list (array_cell (var)); |
1200 | if (l == (WORD_LIST *)NULL) | |
1201 | return ((char *) NULL); | |
b80f6443 JA |
1202 | |
1203 | if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
1204 | { | |
1205 | temp = string_list_dollar_star (l); | |
1206 | retval = quote_string (temp); | |
1207 | free (temp); | |
1208 | } | |
1209 | else /* ${!name[@]} or unquoted ${!name[*]} */ | |
a0c0a00f | 1210 | retval = string_list_dollar_at (l, quoted, 0); |
b80f6443 JA |
1211 | |
1212 | dispose_words (l); | |
1213 | return retval; | |
1214 | } | |
f73dda09 | 1215 | #endif /* ARRAY_VARS */ |