]>
Commit | Line | Data |
---|---|---|
f73dda09 JA |
1 | /* arrayfunc.c -- High-level array functions used by other parts of the shell. */ |
2 | ||
0568080f | 3 | /* Copyright (C) 2001-2015 Free Software Foundation, Inc. |
f73dda09 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
2e4498b3 CR |
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. | |
11 | ||
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. | |
16 | ||
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 | ||
5e13499c CR |
30 | #include "bashintl.h" |
31 | ||
f73dda09 | 32 | #include "shell.h" |
48ff5447 | 33 | #include "pathexp.h" |
7117c2d2 JA |
34 | |
35 | #include "shmbutil.h" | |
c4c90ef8 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; | |
633e5c6d | 44 | extern int array_needs_making; |
f73dda09 | 45 | |
fdf670ea | 46 | static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int)); |
276cb932 | 47 | static SHELL_VAR *assign_array_element_internal __P((SHELL_VAR *, char *, char *, char *, int, char *, int)); |
d11b8b46 | 48 | |
4ac1ff98 | 49 | static char *quote_assign __P((const char *)); |
f73dda09 | 50 | static void quote_array_assignment_chars __P((WORD_LIST *)); |
68dfe178 | 51 | static char *array_value_internal __P((char *, int, int, int *, arrayind_t *)); |
f73dda09 | 52 | |
5e13499c | 53 | /* Standard error message to use when encountering an invalid array subscript */ |
d3ad40de | 54 | const char * const bash_badsub_errmsg = N_("bad array subscript"); |
5e13499c | 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 (); |
d3a24ed2 CR |
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); | |
633e5c6d CR |
84 | if (exported_p (var)) |
85 | array_needs_making++; | |
f73dda09 JA |
86 | |
87 | VSETATTR (var, att_array); | |
88 | VUNSETATTR (var, att_invisible); | |
89 | ||
90 | return var; | |
91 | } | |
92 | ||
fdf670ea CR |
93 | /* Convert a shell variable to an array variable. The original value is |
94 | saved as array[0]. */ | |
95 | SHELL_VAR * | |
96 | convert_var_to_assoc (var) | |
97 | SHELL_VAR *var; | |
98 | { | |
99 | char *oldval; | |
100 | HASH_TABLE *hash; | |
101 | ||
102 | oldval = value_cell (var); | |
103 | hash = assoc_create (0); | |
104 | if (oldval) | |
af98a2a6 | 105 | assoc_insert (hash, savestring ("0"), oldval); |
fdf670ea CR |
106 | |
107 | FREE (value_cell (var)); | |
108 | var_setassoc (var, hash); | |
109 | ||
110 | /* these aren't valid anymore */ | |
111 | var->dynamic_value = (sh_var_value_func_t *)NULL; | |
112 | var->assign_func = (sh_var_assign_func_t *)NULL; | |
113 | ||
114 | INVALIDATE_EXPORTSTR (var); | |
115 | if (exported_p (var)) | |
116 | array_needs_making++; | |
117 | ||
118 | VSETATTR (var, att_assoc); | |
119 | VUNSETATTR (var, att_invisible); | |
120 | ||
121 | return var; | |
122 | } | |
123 | ||
861a1900 CR |
124 | char * |
125 | make_array_variable_value (entry, ind, key, value, flags) | |
d11b8b46 CR |
126 | SHELL_VAR *entry; |
127 | arrayind_t ind; | |
fdf670ea | 128 | char *key; |
d11b8b46 CR |
129 | char *value; |
130 | int flags; | |
131 | { | |
132 | SHELL_VAR *dentry; | |
133 | char *newval; | |
134 | ||
135 | /* If we're appending, we need the old value of the array reference, so | |
136 | fake out make_variable_value with a dummy SHELL_VAR */ | |
137 | if (flags & ASS_APPEND) | |
138 | { | |
139 | dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); | |
140 | dentry->name = savestring (entry->name); | |
fdf670ea CR |
141 | if (assoc_p (entry)) |
142 | newval = assoc_reference (assoc_cell (entry), key); | |
143 | else | |
144 | newval = array_reference (array_cell (entry), ind); | |
d11b8b46 CR |
145 | if (newval) |
146 | dentry->value = savestring (newval); | |
147 | else | |
148 | { | |
149 | dentry->value = (char *)xmalloc (1); | |
150 | dentry->value[0] = '\0'; | |
151 | } | |
152 | dentry->exportstr = 0; | |
fdf670ea | 153 | dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported); |
d11b8b46 CR |
154 | /* Leave the rest of the members uninitialized; the code doesn't look |
155 | at them. */ | |
156 | newval = make_variable_value (dentry, value, flags); | |
157 | dispose_variable (dentry); | |
158 | } | |
159 | else | |
160 | newval = make_variable_value (entry, value, flags); | |
161 | ||
861a1900 CR |
162 | return newval; |
163 | } | |
164 | ||
165 | static SHELL_VAR * | |
166 | bind_array_var_internal (entry, ind, key, value, flags) | |
167 | SHELL_VAR *entry; | |
168 | arrayind_t ind; | |
169 | char *key; | |
170 | char *value; | |
171 | int flags; | |
172 | { | |
173 | char *newval; | |
174 | ||
175 | newval = make_array_variable_value (entry, ind, key, value, flags); | |
176 | ||
d11b8b46 | 177 | if (entry->assign_func) |
fdf670ea CR |
178 | (*entry->assign_func) (entry, newval, ind, key); |
179 | else if (assoc_p (entry)) | |
180 | assoc_insert (assoc_cell (entry), key, newval); | |
d11b8b46 CR |
181 | else |
182 | array_insert (array_cell (entry), ind, newval); | |
183 | FREE (newval); | |
184 | ||
d2465f43 | 185 | VUNSETATTR (entry, att_invisible); /* no longer invisible */ |
d11b8b46 CR |
186 | return (entry); |
187 | } | |
188 | ||
f73dda09 JA |
189 | /* Perform an array assignment name[ind]=value. If NAME already exists and |
190 | is not an array, and IND is 0, perform name=value instead. If NAME exists | |
191 | and is not an array, and IND is not 0, convert it into an array with the | |
192 | existing value as name[0]. | |
193 | ||
194 | If NAME does not exist, just create an array variable, no matter what | |
195 | IND's value may be. */ | |
196 | SHELL_VAR * | |
d11b8b46 | 197 | bind_array_variable (name, ind, value, flags) |
f73dda09 JA |
198 | char *name; |
199 | arrayind_t ind; | |
200 | char *value; | |
d11b8b46 | 201 | int flags; |
f73dda09 JA |
202 | { |
203 | SHELL_VAR *entry; | |
f73dda09 | 204 | |
348a457e | 205 | entry = find_shell_variable (name); |
f73dda09 JA |
206 | |
207 | if (entry == (SHELL_VAR *) 0) | |
208 | entry = make_new_array_variable (name); | |
09f70f2f | 209 | else if ((readonly_p (entry) && (flags&ASS_FORCE) == 0) || noassign_p (entry)) |
f73dda09 JA |
210 | { |
211 | if (readonly_p (entry)) | |
7117c2d2 | 212 | err_readonly (name); |
f73dda09 JA |
213 | return (entry); |
214 | } | |
215 | else if (array_p (entry) == 0) | |
216 | entry = convert_var_to_array (entry); | |
217 | ||
218 | /* ENTRY is an array variable, and ARRAY points to the value. */ | |
fdf670ea | 219 | return (bind_array_var_internal (entry, ind, 0, value, flags)); |
f73dda09 JA |
220 | } |
221 | ||
6a8fd0ed CR |
222 | SHELL_VAR * |
223 | bind_array_element (entry, ind, value, flags) | |
224 | SHELL_VAR *entry; | |
225 | arrayind_t ind; | |
226 | char *value; | |
227 | int flags; | |
228 | { | |
fdf670ea | 229 | return (bind_array_var_internal (entry, ind, 0, value, flags)); |
6a8fd0ed CR |
230 | } |
231 | ||
fdf670ea CR |
232 | SHELL_VAR * |
233 | bind_assoc_variable (entry, name, key, value, flags) | |
234 | SHELL_VAR *entry; | |
235 | char *name; | |
236 | char *key; | |
237 | char *value; | |
238 | int flags; | |
239 | { | |
240 | SHELL_VAR *dentry; | |
241 | char *newval; | |
242 | ||
09f70f2f | 243 | if ((readonly_p (entry) && (flags&ASS_FORCE) == 0) || noassign_p (entry)) |
fdf670ea CR |
244 | { |
245 | if (readonly_p (entry)) | |
246 | err_readonly (name); | |
247 | return (entry); | |
248 | } | |
249 | ||
250 | return (bind_array_var_internal (entry, 0, key, value, flags)); | |
251 | } | |
252 | ||
f73dda09 JA |
253 | /* Parse NAME, a lhs of an assignment statement of the form v[s], and |
254 | assign VALUE to that array element by calling bind_array_variable(). */ | |
255 | SHELL_VAR * | |
d11b8b46 | 256 | assign_array_element (name, value, flags) |
f73dda09 | 257 | char *name, *value; |
d11b8b46 | 258 | int flags; |
f73dda09 | 259 | { |
276cb932 | 260 | char *sub, *vname; |
f73dda09 JA |
261 | int sublen; |
262 | SHELL_VAR *entry; | |
263 | ||
264 | vname = array_variable_name (name, &sub, &sublen); | |
265 | ||
266 | if (vname == 0) | |
267 | return ((SHELL_VAR *)NULL); | |
268 | ||
269 | if ((ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']') || (sublen <= 1)) | |
270 | { | |
271 | free (vname); | |
7117c2d2 | 272 | err_badarraysub (name); |
f73dda09 JA |
273 | return ((SHELL_VAR *)NULL); |
274 | } | |
275 | ||
fdf670ea | 276 | entry = find_variable (vname); |
276cb932 CR |
277 | entry = assign_array_element_internal (entry, name, vname, sub, sublen, value, flags); |
278 | ||
279 | free (vname); | |
280 | return entry; | |
281 | } | |
282 | ||
283 | static SHELL_VAR * | |
284 | assign_array_element_internal (entry, name, vname, sub, sublen, value, flags) | |
285 | SHELL_VAR *entry; | |
286 | char *name; /* only used for error messages */ | |
287 | char *vname; | |
288 | char *sub; | |
289 | int sublen; | |
290 | char *value; | |
291 | int flags; | |
292 | { | |
293 | char *akey; | |
294 | arrayind_t ind; | |
fdf670ea CR |
295 | |
296 | if (entry && assoc_p (entry)) | |
f73dda09 | 297 | { |
fdf670ea CR |
298 | sub[sublen-1] = '\0'; |
299 | akey = expand_assignment_string_to_string (sub, 0); /* [ */ | |
300 | sub[sublen-1] = ']'; | |
301 | if (akey == 0 || *akey == 0) | |
302 | { | |
fdf670ea | 303 | err_badarraysub (name); |
631b20c6 | 304 | FREE (akey); |
fdf670ea CR |
305 | return ((SHELL_VAR *)NULL); |
306 | } | |
307 | entry = bind_assoc_variable (entry, vname, akey, value, flags); | |
308 | } | |
309 | else | |
310 | { | |
d9e1f41e | 311 | ind = array_expand_index (entry, sub, sublen); |
a7ad477f | 312 | /* negative subscripts to indexed arrays count back from end */ |
adbaf2b3 CR |
313 | if (entry && ind < 0) |
314 | ind = (array_p (entry) ? array_max_index (array_cell (entry)) : 0) + 1 + ind; | |
fdf670ea CR |
315 | if (ind < 0) |
316 | { | |
fdf670ea CR |
317 | err_badarraysub (name); |
318 | return ((SHELL_VAR *)NULL); | |
319 | } | |
320 | entry = bind_array_variable (vname, ind, value, flags); | |
f73dda09 | 321 | } |
f73dda09 | 322 | |
f73dda09 JA |
323 | return (entry); |
324 | } | |
325 | ||
326 | /* Find the array variable corresponding to NAME. If there is no variable, | |
327 | create a new array variable. If the variable exists but is not an array, | |
fdf670ea | 328 | convert it to an indexed array. If FLAGS&1 is non-zero, an existing |
f73dda09 | 329 | variable is checked for the readonly or noassign attribute in preparation |
fdf670ea CR |
330 | for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we |
331 | create an associative array. */ | |
f73dda09 | 332 | SHELL_VAR * |
fdf670ea | 333 | find_or_make_array_variable (name, flags) |
f73dda09 | 334 | char *name; |
fdf670ea | 335 | int flags; |
f73dda09 JA |
336 | { |
337 | SHELL_VAR *var; | |
338 | ||
339 | var = find_variable (name); | |
d42cb8c1 CR |
340 | if (var == 0) |
341 | { | |
342 | /* See if we have a nameref pointing to a variable that hasn't been | |
343 | created yet. */ | |
344 | var = find_variable_last_nameref (name); | |
345 | if (var && nameref_p (var)) | |
346 | var = (flags & 2) ? make_new_assoc_variable (nameref_cell (var)) : make_new_array_variable (nameref_cell (var)); | |
347 | } | |
f73dda09 JA |
348 | |
349 | if (var == 0) | |
fdf670ea CR |
350 | var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name); |
351 | else if ((flags & 1) && (readonly_p (var) || noassign_p (var))) | |
f73dda09 JA |
352 | { |
353 | if (readonly_p (var)) | |
7117c2d2 | 354 | err_readonly (name); |
f73dda09 JA |
355 | return ((SHELL_VAR *)NULL); |
356 | } | |
fdf670ea CR |
357 | else if ((flags & 2) && array_p (var)) |
358 | { | |
1f6ec1a8 | 359 | last_command_exit_value = 1; |
fdf670ea CR |
360 | report_error (_("%s: cannot convert indexed to associative array"), name); |
361 | return ((SHELL_VAR *)NULL); | |
362 | } | |
363 | else if (array_p (var) == 0 && assoc_p (var) == 0) | |
f73dda09 JA |
364 | var = convert_var_to_array (var); |
365 | ||
366 | return (var); | |
367 | } | |
368 | ||
369 | /* Perform a compound assignment statement for array NAME, where VALUE is | |
370 | the text between the parens: NAME=( VALUE ) */ | |
371 | SHELL_VAR * | |
d11b8b46 | 372 | assign_array_from_string (name, value, flags) |
f73dda09 | 373 | char *name, *value; |
d11b8b46 | 374 | int flags; |
f73dda09 JA |
375 | { |
376 | SHELL_VAR *var; | |
fdf670ea | 377 | int vflags; |
f73dda09 | 378 | |
fdf670ea CR |
379 | vflags = 1; |
380 | if (flags & ASS_MKASSOC) | |
381 | vflags |= 2; | |
382 | ||
383 | var = find_or_make_array_variable (name, vflags); | |
f73dda09 JA |
384 | if (var == 0) |
385 | return ((SHELL_VAR *)NULL); | |
386 | ||
d11b8b46 | 387 | return (assign_array_var_from_string (var, value, flags)); |
f73dda09 JA |
388 | } |
389 | ||
390 | /* Sequentially assign the indices of indexed array variable VAR from the | |
391 | words in LIST. */ | |
392 | SHELL_VAR * | |
d11b8b46 | 393 | assign_array_var_from_word_list (var, list, flags) |
f73dda09 JA |
394 | SHELL_VAR *var; |
395 | WORD_LIST *list; | |
d11b8b46 | 396 | int flags; |
f73dda09 JA |
397 | { |
398 | register arrayind_t i; | |
399 | register WORD_LIST *l; | |
400 | ARRAY *a; | |
401 | ||
d11b8b46 CR |
402 | a = array_cell (var); |
403 | i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0; | |
404 | ||
405 | for (l = list; l; l = l->next, i++) | |
f73dda09 | 406 | if (var->assign_func) |
fdf670ea | 407 | (*var->assign_func) (var, l->word->word, i, 0); |
f73dda09 | 408 | else |
7117c2d2 | 409 | array_insert (a, i, l->word->word); |
60b80a1f CR |
410 | |
411 | VUNSETATTR (var, att_invisible); /* no longer invisible */ | |
412 | ||
f73dda09 JA |
413 | return var; |
414 | } | |
415 | ||
d3ad40de | 416 | WORD_LIST * |
fdf670ea CR |
417 | expand_compound_array_assignment (var, value, flags) |
418 | SHELL_VAR *var; | |
f73dda09 | 419 | char *value; |
d11b8b46 | 420 | int flags; |
f73dda09 | 421 | { |
f73dda09 | 422 | WORD_LIST *list, *nlist; |
276cb932 | 423 | WORD_LIST *hd, *tl, *t, *n; |
d3ad40de CR |
424 | char *val; |
425 | int ni; | |
f73dda09 | 426 | |
276cb932 CR |
427 | /* This condition is true when invoked from the declare builtin with a |
428 | command like | |
429 | declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")' */ | |
f73dda09 JA |
430 | if (*value == '(') /*)*/ |
431 | { | |
432 | ni = 1; | |
433 | val = extract_array_assignment_list (value, &ni); | |
434 | if (val == 0) | |
d3ad40de | 435 | return (WORD_LIST *)NULL; |
f73dda09 JA |
436 | } |
437 | else | |
438 | val = value; | |
439 | ||
440 | /* Expand the value string into a list of words, performing all the | |
441 | shell expansions including pathname generation and word splitting. */ | |
442 | /* First we split the string on whitespace, using the shell parser | |
443 | (ksh93 seems to do this). */ | |
5e13499c | 444 | list = parse_string_to_word_list (val, 1, "array assign"); |
f73dda09 | 445 | |
276cb932 CR |
446 | if (var && assoc_p (var)) |
447 | { | |
448 | if (val != value) | |
449 | free (val); | |
450 | return list; | |
451 | } | |
452 | ||
f73dda09 | 453 | /* If we're using [subscript]=value, we need to quote each [ and ] to |
276cb932 CR |
454 | prevent unwanted filename expansion. This doesn't need to be done |
455 | for associative array expansion, since that uses a different expansion | |
456 | function (see assign_compound_array_list below). */ | |
f73dda09 JA |
457 | if (list) |
458 | quote_array_assignment_chars (list); | |
459 | ||
460 | /* Now that we've split it, perform the shell expansions on each | |
461 | word in the list. */ | |
462 | nlist = list ? expand_words_no_vars (list) : (WORD_LIST *)NULL; | |
463 | ||
464 | dispose_words (list); | |
465 | ||
466 | if (val != value) | |
467 | free (val); | |
468 | ||
d3ad40de CR |
469 | return nlist; |
470 | } | |
471 | ||
824dfe68 | 472 | /* Callers ensure that VAR is not NULL */ |
d3ad40de CR |
473 | void |
474 | assign_compound_array_list (var, nlist, flags) | |
475 | SHELL_VAR *var; | |
476 | WORD_LIST *nlist; | |
477 | int flags; | |
478 | { | |
479 | ARRAY *a; | |
fdf670ea | 480 | HASH_TABLE *h; |
d3ad40de | 481 | WORD_LIST *list; |
06c3a575 | 482 | char *w, *val, *nval, *savecmd; |
276cb932 | 483 | int len, iflags, free_val; |
d3ad40de | 484 | arrayind_t ind, last_ind; |
fdf670ea | 485 | char *akey; |
d3ad40de | 486 | |
fdf670ea CR |
487 | a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0; |
488 | h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0; | |
489 | ||
490 | akey = (char *)0; | |
491 | ind = 0; | |
f73dda09 JA |
492 | |
493 | /* Now that we are ready to assign values to the array, kill the existing | |
494 | value. */ | |
fdf670ea CR |
495 | if ((flags & ASS_APPEND) == 0) |
496 | { | |
824dfe68 | 497 | if (a && array_p (var)) |
fdf670ea | 498 | array_flush (a); |
824dfe68 | 499 | else if (h && assoc_p (var)) |
fdf670ea CR |
500 | assoc_flush (h); |
501 | } | |
502 | ||
503 | last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0; | |
f73dda09 | 504 | |
d11b8b46 | 505 | for (list = nlist; list; list = list->next) |
f73dda09 | 506 | { |
09f70f2f CR |
507 | /* Don't allow var+=(values) to make assignments in VALUES append to |
508 | existing values by default. */ | |
509 | iflags = flags & ~ASS_APPEND; | |
f73dda09 JA |
510 | w = list->word->word; |
511 | ||
512 | /* We have a word of the form [ind]=value */ | |
5e13499c | 513 | if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[') |
f73dda09 | 514 | { |
276cb932 CR |
515 | /* Don't have to handle embedded quotes specially any more, since |
516 | associative array subscripts have not been expanded yet (see | |
517 | above). */ | |
518 | len = skipsubscript (w, 0, 0); | |
f73dda09 | 519 | |
d11b8b46 CR |
520 | /* XXX - changes for `+=' */ |
521 | if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '='))) | |
f73dda09 | 522 | { |
fdf670ea CR |
523 | if (assoc_p (var)) |
524 | { | |
525 | err_badarraysub (w); | |
526 | continue; | |
527 | } | |
d11b8b46 | 528 | nval = make_variable_value (var, w, flags); |
f73dda09 | 529 | if (var->assign_func) |
fdf670ea | 530 | (*var->assign_func) (var, nval, last_ind, 0); |
f73dda09 | 531 | else |
7117c2d2 | 532 | array_insert (a, last_ind, nval); |
f73dda09 JA |
533 | FREE (nval); |
534 | last_ind++; | |
535 | continue; | |
536 | } | |
537 | ||
538 | if (len == 1) | |
539 | { | |
7117c2d2 | 540 | err_badarraysub (w); |
f73dda09 JA |
541 | continue; |
542 | } | |
543 | ||
544 | if (ALL_ELEMENT_SUB (w[1]) && len == 2) | |
545 | { | |
1f6ec1a8 | 546 | last_command_exit_value = 1; |
fdf670ea CR |
547 | if (assoc_p (var)) |
548 | report_error (_("%s: invalid associative array key"), w); | |
549 | else | |
550 | report_error (_("%s: cannot assign to non-numeric index"), w); | |
f73dda09 JA |
551 | continue; |
552 | } | |
553 | ||
fdf670ea | 554 | if (array_p (var)) |
f73dda09 | 555 | { |
d9e1f41e | 556 | ind = array_expand_index (var, w + 1, len); |
a7ad477f CR |
557 | /* negative subscripts to indexed arrays count back from end */ |
558 | if (ind < 0) | |
559 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
fdf670ea CR |
560 | if (ind < 0) |
561 | { | |
562 | err_badarraysub (w); | |
563 | continue; | |
564 | } | |
565 | ||
566 | last_ind = ind; | |
567 | } | |
568 | else if (assoc_p (var)) | |
569 | { | |
276cb932 CR |
570 | /* This is not performed above, see expand_compound_array_assignment */ |
571 | w[len] = '\0'; /*[*/ | |
572 | akey = expand_assignment_string_to_string (w+1, 0); | |
573 | w[len] = ']'; | |
574 | /* And we need to expand the value also, see below */ | |
fdf670ea CR |
575 | if (akey == 0 || *akey == 0) |
576 | { | |
577 | err_badarraysub (w); | |
631b20c6 | 578 | FREE (akey); |
fdf670ea CR |
579 | continue; |
580 | } | |
f73dda09 | 581 | } |
fdf670ea | 582 | |
d3ad40de | 583 | /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */ |
d11b8b46 CR |
584 | if (w[len + 1] == '+' && w[len + 2] == '=') |
585 | { | |
d3ad40de | 586 | iflags |= ASS_APPEND; |
d11b8b46 CR |
587 | val = w + len + 3; |
588 | } | |
589 | else | |
276cb932 | 590 | val = w + len + 2; |
f73dda09 | 591 | } |
fdf670ea CR |
592 | else if (assoc_p (var)) |
593 | { | |
1f6ec1a8 | 594 | last_command_exit_value = 1; |
fdf670ea CR |
595 | report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w); |
596 | continue; | |
597 | } | |
f73dda09 JA |
598 | else /* No [ind]=value, just a stray `=' */ |
599 | { | |
600 | ind = last_ind; | |
601 | val = w; | |
602 | } | |
603 | ||
276cb932 CR |
604 | free_val = 0; |
605 | /* See above; we need to expand the value here */ | |
606 | if (assoc_p (var)) | |
607 | { | |
608 | val = expand_assignment_string_to_string (val, 0); | |
e2f12fdf CR |
609 | if (val == 0) |
610 | { | |
611 | val = (char *)xmalloc (1); | |
612 | val[0] = '\0'; /* like do_assignment_internal */ | |
613 | } | |
276cb932 CR |
614 | free_val = 1; |
615 | } | |
616 | ||
06c3a575 | 617 | savecmd = this_command_name; |
f73dda09 JA |
618 | if (integer_p (var)) |
619 | this_command_name = (char *)NULL; /* no command name for errors */ | |
fdf670ea | 620 | bind_array_var_internal (var, ind, akey, val, iflags); |
f73dda09 | 621 | last_ind++; |
06c3a575 | 622 | this_command_name = savecmd; |
276cb932 CR |
623 | |
624 | if (free_val) | |
625 | free (val); | |
f73dda09 | 626 | } |
d3ad40de CR |
627 | } |
628 | ||
629 | /* Perform a compound array assignment: VAR->name=( VALUE ). The | |
630 | VALUE has already had the parentheses stripped. */ | |
631 | SHELL_VAR * | |
632 | assign_array_var_from_string (var, value, flags) | |
633 | SHELL_VAR *var; | |
634 | char *value; | |
635 | int flags; | |
636 | { | |
637 | WORD_LIST *nlist; | |
638 | ||
639 | if (value == 0) | |
640 | return var; | |
641 | ||
fdf670ea | 642 | nlist = expand_compound_array_assignment (var, value, flags); |
d3ad40de | 643 | assign_compound_array_list (var, nlist, flags); |
f73dda09 | 644 | |
d3ad40de CR |
645 | if (nlist) |
646 | dispose_words (nlist); | |
60b80a1f CR |
647 | |
648 | if (var) | |
649 | VUNSETATTR (var, att_invisible); /* no longer invisible */ | |
650 | ||
f73dda09 JA |
651 | return (var); |
652 | } | |
653 | ||
fdf670ea CR |
654 | /* Quote globbing chars and characters in $IFS before the `=' in an assignment |
655 | statement (usually a compound array assignment) to protect them from | |
656 | unwanted filename expansion or word splitting. */ | |
4ac1ff98 CR |
657 | static char * |
658 | quote_assign (string) | |
659 | const char *string; | |
660 | { | |
661 | size_t slen; | |
662 | int saw_eq; | |
3eb2d94a | 663 | char *temp, *t, *subs; |
4ac1ff98 | 664 | const char *s, *send; |
3eb2d94a | 665 | int ss, se; |
4ac1ff98 CR |
666 | DECLARE_MBSTATE; |
667 | ||
668 | slen = strlen (string); | |
669 | send = string + slen; | |
670 | ||
671 | t = temp = (char *)xmalloc (slen * 2 + 1); | |
672 | saw_eq = 0; | |
673 | for (s = string; *s; ) | |
674 | { | |
675 | if (*s == '=') | |
676 | saw_eq = 1; | |
3eb2d94a CR |
677 | if (saw_eq == 0 && *s == '[') /* looks like a subscript */ |
678 | { | |
679 | ss = s - string; | |
680 | se = skipsubscript (string, ss, 0); | |
681 | subs = substring (s, ss, se); | |
682 | *t++ = '\\'; | |
683 | strcpy (t, subs); | |
684 | t += se - ss; | |
685 | *t++ = '\\'; | |
686 | *t++ = ']'; | |
687 | s += se + 1; | |
688 | free (subs); | |
689 | continue; | |
690 | } | |
4ac1ff98 CR |
691 | if (saw_eq == 0 && (glob_char_p (s) || isifs (*s))) |
692 | *t++ = '\\'; | |
693 | ||
694 | COPY_CHAR_P (t, s, send); | |
695 | } | |
696 | *t = '\0'; | |
697 | return temp; | |
698 | } | |
699 | ||
f73dda09 | 700 | /* For each word in a compound array assignment, if the word looks like |
fdf670ea | 701 | [ind]=value, quote globbing chars and characters in $IFS before the `='. */ |
f73dda09 JA |
702 | static void |
703 | quote_array_assignment_chars (list) | |
704 | WORD_LIST *list; | |
705 | { | |
4ac1ff98 | 706 | char *nword; |
f73dda09 JA |
707 | WORD_LIST *l; |
708 | ||
709 | for (l = list; l; l = l->next) | |
710 | { | |
711 | if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0') | |
712 | continue; /* should not happen, but just in case... */ | |
df0e4bfe CR |
713 | /* Don't bother if it hasn't been recognized as an assignment or |
714 | doesn't look like [ind]=value */ | |
715 | if ((l->word->flags & W_ASSIGNMENT) == 0) | |
716 | continue; | |
d0ca3503 | 717 | if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */ |
f73dda09 | 718 | continue; |
df0e4bfe | 719 | |
4ac1ff98 | 720 | nword = quote_assign (l->word->word); |
f73dda09 JA |
721 | free (l->word->word); |
722 | l->word->word = nword; | |
df0e4bfe | 723 | l->word->flags |= W_NOGLOB; /* XXX - W_NOSPLIT also? */ |
f73dda09 JA |
724 | } |
725 | } | |
726 | ||
6932f7f5 | 727 | /* skipsubscript moved to subst.c to use private functions. 2009/02/24. */ |
f73dda09 JA |
728 | |
729 | /* This function is called with SUB pointing to just after the beginning | |
730 | `[' of an array subscript and removes the array element to which SUB | |
731 | expands from array VAR. A subscript of `*' or `@' unsets the array. */ | |
732 | int | |
733 | unbind_array_element (var, sub) | |
734 | SHELL_VAR *var; | |
735 | char *sub; | |
736 | { | |
737 | int len; | |
738 | arrayind_t ind; | |
fdf670ea | 739 | char *akey; |
f73dda09 JA |
740 | ARRAY_ELEMENT *ae; |
741 | ||
0568080f | 742 | len = skipsubscript (sub, 0, (var && assoc_p(var))); |
f73dda09 JA |
743 | if (sub[len] != ']' || len == 0) |
744 | { | |
5e13499c | 745 | builtin_error ("%s[%s: %s", var->name, sub, _(bash_badsub_errmsg)); |
f73dda09 JA |
746 | return -1; |
747 | } | |
748 | sub[len] = '\0'; | |
749 | ||
750 | if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0) | |
751 | { | |
06c3a575 CR |
752 | if (array_p (var) || assoc_p (var)) |
753 | { | |
754 | unbind_variable (var->name); /* XXX -- {array,assoc}_flush ? */ | |
755 | return (0); | |
756 | } | |
757 | else | |
758 | return -2; /* don't allow this to unset scalar variables */ | |
f73dda09 | 759 | } |
fdf670ea CR |
760 | |
761 | if (assoc_p (var)) | |
f73dda09 | 762 | { |
fdf670ea CR |
763 | akey = expand_assignment_string_to_string (sub, 0); /* [ */ |
764 | if (akey == 0 || *akey == 0) | |
765 | { | |
766 | builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg)); | |
631b20c6 | 767 | FREE (akey); |
fdf670ea CR |
768 | return -1; |
769 | } | |
770 | assoc_remove (assoc_cell (var), akey); | |
68dfe178 | 771 | free (akey); |
f73dda09 | 772 | } |
06c3a575 | 773 | else if (array_p (var)) |
fdf670ea | 774 | { |
d9e1f41e | 775 | ind = array_expand_index (var, sub, len+1); |
a7ad477f CR |
776 | /* negative subscripts to indexed arrays count back from end */ |
777 | if (ind < 0) | |
778 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
fdf670ea CR |
779 | if (ind < 0) |
780 | { | |
781 | builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg)); | |
782 | return -1; | |
783 | } | |
784 | ae = array_remove (array_cell (var), ind); | |
785 | if (ae) | |
786 | array_dispose_element (ae); | |
787 | } | |
06c3a575 CR |
788 | else /* array_p (var) == 0 && assoc_p (var) == 0 */ |
789 | { | |
790 | akey = this_command_name; | |
791 | ind = array_expand_index (var, sub, len+1); | |
792 | this_command_name = akey; | |
793 | if (ind == 0) | |
794 | { | |
795 | unbind_variable (var->name); | |
796 | return (0); | |
797 | } | |
798 | else | |
799 | return -2; /* any subscript other than 0 is invalid with scalar variables */ | |
800 | } | |
fdf670ea | 801 | |
f73dda09 JA |
802 | return 0; |
803 | } | |
804 | ||
805 | /* Format and output an array assignment in compound form VAR=(VALUES), | |
806 | suitable for re-use as input. */ | |
807 | void | |
808 | print_array_assignment (var, quoted) | |
809 | SHELL_VAR *var; | |
810 | int quoted; | |
811 | { | |
812 | char *vstr; | |
813 | ||
7117c2d2 | 814 | vstr = array_to_assign (array_cell (var), quoted); |
f73dda09 JA |
815 | |
816 | if (vstr == 0) | |
817 | printf ("%s=%s\n", var->name, quoted ? "'()'" : "()"); | |
818 | else | |
819 | { | |
820 | printf ("%s=%s\n", var->name, vstr); | |
821 | free (vstr); | |
822 | } | |
823 | } | |
824 | ||
fdf670ea CR |
825 | /* Format and output an associative array assignment in compound form |
826 | VAR=(VALUES), suitable for re-use as input. */ | |
827 | void | |
828 | print_assoc_assignment (var, quoted) | |
829 | SHELL_VAR *var; | |
830 | int quoted; | |
831 | { | |
832 | char *vstr; | |
833 | ||
834 | vstr = assoc_to_assign (assoc_cell (var), quoted); | |
835 | ||
836 | if (vstr == 0) | |
837 | printf ("%s=%s\n", var->name, quoted ? "'()'" : "()"); | |
838 | else | |
839 | { | |
840 | printf ("%s=%s\n", var->name, vstr); | |
841 | free (vstr); | |
842 | } | |
843 | } | |
844 | ||
f73dda09 JA |
845 | /***********************************************************************/ |
846 | /* */ | |
847 | /* Utility functions to manage arrays and their contents for expansion */ | |
848 | /* */ | |
849 | /***********************************************************************/ | |
850 | ||
851 | /* Return 1 if NAME is a properly-formed array reference v[sub]. */ | |
852 | int | |
2171061f | 853 | valid_array_reference (name, flags) |
f73dda09 | 854 | char *name; |
2171061f | 855 | int flags; |
f73dda09 JA |
856 | { |
857 | char *t; | |
858 | int r, len; | |
859 | ||
d0ca3503 | 860 | t = mbschr (name, '['); /* ] */ |
f73dda09 JA |
861 | if (t) |
862 | { | |
863 | *t = '\0'; | |
864 | r = legal_identifier (name); | |
865 | *t = '['; | |
866 | if (r == 0) | |
867 | return 0; | |
868 | /* Check for a properly-terminated non-blank subscript. */ | |
3eb2d94a | 869 | len = skipsubscript (t, 0, 0); |
f73dda09 JA |
870 | if (t[len] != ']' || len == 1) |
871 | return 0; | |
872 | for (r = 1; r < len; r++) | |
873 | if (whitespace (t[r]) == 0) | |
874 | return 1; | |
875 | return 0; | |
876 | } | |
877 | return 0; | |
878 | } | |
879 | ||
880 | /* Expand the array index beginning at S and extending LEN characters. */ | |
881 | arrayind_t | |
d9e1f41e CR |
882 | array_expand_index (var, s, len) |
883 | SHELL_VAR *var; | |
f73dda09 JA |
884 | char *s; |
885 | int len; | |
886 | { | |
06c3a575 | 887 | char *exp, *t, *savecmd; |
f73dda09 JA |
888 | int expok; |
889 | arrayind_t val; | |
890 | ||
891 | exp = (char *)xmalloc (len); | |
892 | strncpy (exp, s, len - 1); | |
893 | exp[len - 1] = '\0'; | |
b4a00022 | 894 | t = expand_arith_string (exp, Q_DOUBLE_QUOTES|Q_ARITH|Q_ARRAYSUB); /* XXX - Q_ARRAYSUB for future use */ |
06c3a575 | 895 | savecmd = this_command_name; |
f73dda09 JA |
896 | this_command_name = (char *)NULL; |
897 | val = evalexp (t, &expok); | |
06c3a575 | 898 | this_command_name = savecmd; |
f73dda09 JA |
899 | free (t); |
900 | free (exp); | |
901 | if (expok == 0) | |
902 | { | |
903 | last_command_exit_value = EXECUTION_FAILURE; | |
c184f645 CR |
904 | |
905 | top_level_cleanup (); | |
f73dda09 JA |
906 | jump_to_top_level (DISCARD); |
907 | } | |
908 | return val; | |
909 | } | |
910 | ||
911 | /* Return the name of the variable specified by S without any subscript. | |
912 | If SUBP is non-null, return a pointer to the start of the subscript | |
913 | in *SUBP. If LENP is non-null, the length of the subscript is returned | |
914 | in *LENP. This returns newly-allocated memory. */ | |
915 | char * | |
916 | array_variable_name (s, subp, lenp) | |
917 | char *s, **subp; | |
918 | int *lenp; | |
919 | { | |
920 | char *t, *ret; | |
921 | int ind, ni; | |
922 | ||
d0ca3503 | 923 | t = mbschr (s, '['); |
f73dda09 | 924 | if (t == 0) |
5e13499c CR |
925 | { |
926 | if (subp) | |
927 | *subp = t; | |
928 | if (lenp) | |
929 | *lenp = 0; | |
930 | return ((char *)NULL); | |
931 | } | |
f73dda09 | 932 | ind = t - s; |
3eb2d94a | 933 | ni = skipsubscript (s, ind, 0); |
f73dda09 JA |
934 | if (ni <= ind + 1 || s[ni] != ']') |
935 | { | |
7117c2d2 | 936 | err_badarraysub (s); |
5e13499c CR |
937 | if (subp) |
938 | *subp = t; | |
939 | if (lenp) | |
940 | *lenp = 0; | |
f73dda09 JA |
941 | return ((char *)NULL); |
942 | } | |
943 | ||
944 | *t = '\0'; | |
945 | ret = savestring (s); | |
946 | *t++ = '['; /* ] */ | |
947 | ||
948 | if (subp) | |
949 | *subp = t; | |
950 | if (lenp) | |
951 | *lenp = ni - ind; | |
952 | ||
953 | return ret; | |
954 | } | |
955 | ||
956 | /* Return the variable specified by S without any subscript. If SUBP is | |
957 | non-null, return a pointer to the start of the subscript in *SUBP. | |
958 | If LENP is non-null, the length of the subscript is returned in *LENP. */ | |
959 | SHELL_VAR * | |
960 | array_variable_part (s, subp, lenp) | |
961 | char *s, **subp; | |
962 | int *lenp; | |
963 | { | |
964 | char *t; | |
965 | SHELL_VAR *var; | |
966 | ||
967 | t = array_variable_name (s, subp, lenp); | |
968 | if (t == 0) | |
969 | return ((SHELL_VAR *)NULL); | |
970 | var = find_variable (t); | |
971 | ||
972 | free (t); | |
a37d979e | 973 | return var; /* now return invisible variables; caller must handle */ |
f73dda09 JA |
974 | } |
975 | ||
67362c60 CR |
976 | #define INDEX_ERROR() \ |
977 | do \ | |
978 | { \ | |
979 | if (var) \ | |
980 | err_badarraysub (var->name); \ | |
981 | else \ | |
982 | { \ | |
983 | t[-1] = '\0'; \ | |
984 | err_badarraysub (s); \ | |
985 | t[-1] = '['; /* ] */\ | |
986 | } \ | |
987 | return ((char *)NULL); \ | |
988 | } \ | |
989 | while (0) | |
990 | ||
f73dda09 JA |
991 | /* Return a string containing the elements in the array and subscript |
992 | described by S. If the subscript is * or @, obeys quoting rules akin | |
7117c2d2 | 993 | to the expansion of $* and $@ including double quoting. If RTYPE |
b1a26c01 CR |
994 | is non-null it gets 1 if the array reference is name[*], 2 if the |
995 | reference is name[@], and 0 otherwise. */ | |
f73dda09 | 996 | static char * |
5f8cde23 | 997 | array_value_internal (s, quoted, flags, rtype, indp) |
f73dda09 | 998 | char *s; |
5f8cde23 | 999 | int quoted, flags, *rtype; |
68dfe178 | 1000 | arrayind_t *indp; |
f73dda09 JA |
1001 | { |
1002 | int len; | |
1003 | arrayind_t ind; | |
fdf670ea | 1004 | char *akey; |
f73dda09 JA |
1005 | char *retval, *t, *temp; |
1006 | WORD_LIST *l; | |
1007 | SHELL_VAR *var; | |
1008 | ||
1009 | var = array_variable_part (s, &t, &len); | |
1010 | ||
7117c2d2 JA |
1011 | /* Expand the index, even if the variable doesn't exist, in case side |
1012 | effects are needed, like ${w[i++]} where w is unset. */ | |
1013 | #if 0 | |
f73dda09 JA |
1014 | if (var == 0) |
1015 | return (char *)NULL; | |
7117c2d2 | 1016 | #endif |
f73dda09 | 1017 | |
d3a24ed2 CR |
1018 | if (len == 0) |
1019 | return ((char *)NULL); /* error message already printed */ | |
1020 | ||
f73dda09 | 1021 | /* [ */ |
631b20c6 | 1022 | akey = 0; |
f73dda09 JA |
1023 | if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']') |
1024 | { | |
7117c2d2 | 1025 | if (rtype) |
b1a26c01 | 1026 | *rtype = (t[0] == '*') ? 1 : 2; |
5f8cde23 | 1027 | if ((flags & AV_ALLOWALL) == 0) |
f73dda09 | 1028 | { |
7117c2d2 | 1029 | err_badarraysub (s); |
f73dda09 JA |
1030 | return ((char *)NULL); |
1031 | } | |
68dfe178 | 1032 | else if (var == 0 || value_cell (var) == 0) /* XXX - check for invisible_p(var) ? */ |
7117c2d2 | 1033 | return ((char *)NULL); |
fdf670ea | 1034 | else if (array_p (var) == 0 && assoc_p (var) == 0) |
7117c2d2 | 1035 | l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL); |
fdf670ea CR |
1036 | else if (assoc_p (var)) |
1037 | { | |
1038 | l = assoc_to_word_list (assoc_cell (var)); | |
1039 | if (l == (WORD_LIST *)NULL) | |
1040 | return ((char *)NULL); | |
1041 | } | |
f73dda09 JA |
1042 | else |
1043 | { | |
1044 | l = array_to_word_list (array_cell (var)); | |
1045 | if (l == (WORD_LIST *)NULL) | |
1046 | return ((char *) NULL); | |
1047 | } | |
1048 | ||
1049 | if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
1050 | { | |
1051 | temp = string_list_dollar_star (l); | |
631b20c6 | 1052 | retval = quote_string (temp); /* XXX - leak here */ |
f73dda09 JA |
1053 | free (temp); |
1054 | } | |
1055 | else /* ${name[@]} or unquoted ${name[*]} */ | |
631b20c6 | 1056 | retval = string_list_dollar_at (l, quoted); /* XXX - leak here */ |
f73dda09 JA |
1057 | |
1058 | dispose_words (l); | |
1059 | } | |
1060 | else | |
1061 | { | |
7117c2d2 JA |
1062 | if (rtype) |
1063 | *rtype = 0; | |
fdf670ea | 1064 | if (var == 0 || array_p (var) || assoc_p (var) == 0) |
f73dda09 | 1065 | { |
5f8cde23 | 1066 | if ((flags & AV_USEIND) == 0 || indp == 0) |
7117c2d2 | 1067 | { |
d9e1f41e | 1068 | ind = array_expand_index (var, t, len); |
67362c60 | 1069 | if (ind < 0) |
5f8cde23 CR |
1070 | { |
1071 | /* negative subscripts to indexed arrays count back from end */ | |
1072 | if (var && array_p (var)) | |
1073 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
1074 | if (ind < 0) | |
1075 | INDEX_ERROR(); | |
1076 | } | |
1077 | if (indp) | |
1078 | *indp = ind; | |
7117c2d2 | 1079 | } |
5f8cde23 CR |
1080 | else if (indp) |
1081 | ind = *indp; | |
f73dda09 | 1082 | } |
fdf670ea CR |
1083 | else if (assoc_p (var)) |
1084 | { | |
1085 | t[len - 1] = '\0'; | |
1086 | akey = expand_assignment_string_to_string (t, 0); /* [ */ | |
1087 | t[len - 1] = ']'; | |
1088 | if (akey == 0 || *akey == 0) | |
631b20c6 CR |
1089 | { |
1090 | FREE (akey); | |
1091 | INDEX_ERROR(); | |
1092 | } | |
fdf670ea CR |
1093 | } |
1094 | ||
68dfe178 | 1095 | if (var == 0 || value_cell (var) == 0) /* XXX - check invisible_p(var) ? */ |
631b20c6 CR |
1096 | { |
1097 | FREE (akey); | |
1098 | return ((char *)NULL); | |
1099 | } | |
fdf670ea | 1100 | if (array_p (var) == 0 && assoc_p (var) == 0) |
7117c2d2 | 1101 | return (ind == 0 ? value_cell (var) : (char *)NULL); |
fdf670ea | 1102 | else if (assoc_p (var)) |
68dfe178 CR |
1103 | { |
1104 | retval = assoc_reference (assoc_cell (var), akey); | |
1105 | free (akey); | |
1106 | } | |
fdf670ea CR |
1107 | else |
1108 | retval = array_reference (array_cell (var), ind); | |
f73dda09 JA |
1109 | } |
1110 | ||
1111 | return retval; | |
1112 | } | |
1113 | ||
1114 | /* Return a string containing the elements described by the array and | |
1115 | subscript contained in S, obeying quoting for subscripts * and @. */ | |
1116 | char * | |
5f8cde23 | 1117 | array_value (s, quoted, flags, rtype, indp) |
f73dda09 | 1118 | char *s; |
5f8cde23 | 1119 | int quoted, flags, *rtype; |
68dfe178 | 1120 | arrayind_t *indp; |
f73dda09 | 1121 | { |
5f8cde23 | 1122 | return (array_value_internal (s, quoted, flags|AV_ALLOWALL, rtype, indp)); |
f73dda09 JA |
1123 | } |
1124 | ||
1125 | /* Return the value of the array indexing expression S as a single string. | |
5f8cde23 CR |
1126 | If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This |
1127 | is used by other parts of the shell such as the arithmetic expression | |
1128 | evaluator in expr.c. */ | |
f73dda09 | 1129 | char * |
5f8cde23 | 1130 | get_array_value (s, flags, rtype, indp) |
f73dda09 | 1131 | char *s; |
5f8cde23 | 1132 | int flags, *rtype; |
68dfe178 | 1133 | arrayind_t *indp; |
f73dda09 | 1134 | { |
5f8cde23 | 1135 | return (array_value_internal (s, 0, flags, rtype, indp)); |
f73dda09 JA |
1136 | } |
1137 | ||
d3a24ed2 CR |
1138 | char * |
1139 | array_keys (s, quoted) | |
1140 | char *s; | |
1141 | int quoted; | |
1142 | { | |
1143 | int len; | |
1144 | char *retval, *t, *temp; | |
1145 | WORD_LIST *l; | |
1146 | SHELL_VAR *var; | |
1147 | ||
1148 | var = array_variable_part (s, &t, &len); | |
1149 | ||
1150 | /* [ */ | |
1151 | if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']') | |
1152 | return (char *)NULL; | |
1153 | ||
68dfe178 CR |
1154 | if (var_isset (var) == 0 || invisible_p (var)) |
1155 | return (char *)NULL; | |
1156 | ||
fdf670ea | 1157 | if (array_p (var) == 0 && assoc_p (var) == 0) |
d3a24ed2 | 1158 | l = add_string_to_list ("0", (WORD_LIST *)NULL); |
fdf670ea CR |
1159 | else if (assoc_p (var)) |
1160 | l = assoc_keys_to_word_list (assoc_cell (var)); | |
d3a24ed2 | 1161 | else |
fdf670ea CR |
1162 | l = array_keys_to_word_list (array_cell (var)); |
1163 | if (l == (WORD_LIST *)NULL) | |
1164 | return ((char *) NULL); | |
d3a24ed2 CR |
1165 | |
1166 | if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
1167 | { | |
1168 | temp = string_list_dollar_star (l); | |
1169 | retval = quote_string (temp); | |
1170 | free (temp); | |
1171 | } | |
1172 | else /* ${!name[@]} or unquoted ${!name[*]} */ | |
1173 | retval = string_list_dollar_at (l, quoted); | |
1174 | ||
1175 | dispose_words (l); | |
1176 | return retval; | |
1177 | } | |
f73dda09 | 1178 | #endif /* ARRAY_VARS */ |