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Commit | Line | Data |
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f73dda09 JA |
1 | /* arrayfunc.c -- High-level array functions used by other parts of the shell. */ |
2 | ||
b2613ad1 | 3 | /* Copyright (C) 2001-2023 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" |
ec157dfe | 33 | #include "execute_cmd.h" |
48ff5447 | 34 | #include "pathexp.h" |
7117c2d2 JA |
35 | |
36 | #include "shmbutil.h" | |
c4c90ef8 CR |
37 | #if defined (HAVE_MBSTR_H) && defined (HAVE_MBSCHR) |
38 | # include <mbstr.h> /* mbschr */ | |
39 | #endif | |
7117c2d2 | 40 | |
f73dda09 JA |
41 | #include "builtins/common.h" |
42 | ||
c6c7ae81 CR |
43 | #ifndef LBRACK |
44 | # define LBRACK '[' | |
45 | # define RBRACK ']' | |
46 | #endif | |
47 | ||
a57ed9e9 CR |
48 | /* This variable means to not expand associative array subscripts more than |
49 | once, when performing variable expansion. */ | |
50 | int assoc_expand_once = 0; | |
51 | ||
0275a139 CR |
52 | /* Ditto for indexed array subscripts -- currently unused */ |
53 | int array_expand_once = 0; | |
e297b059 | 54 | |
b2613ad1 CR |
55 | static SHELL_VAR *bind_array_var_internal (SHELL_VAR *, arrayind_t, char *, const char *, int); |
56 | static SHELL_VAR *assign_array_element_internal (SHELL_VAR *, const char *, char *, char *, int, const char *, int, array_eltstate_t *); | |
d11b8b46 | 57 | |
a61ffa78 | 58 | static void assign_assoc_from_kvlist (SHELL_VAR *, WORD_LIST *, HASH_TABLE *, int); |
5f49ef47 | 59 | |
a61ffa78 CR |
60 | static char *quote_assign (const char *); |
61 | static void quote_array_assignment_chars (WORD_LIST *); | |
62 | static char *quote_compound_array_word (char *, int); | |
63 | static char *array_value_internal (const char *, int, int, array_eltstate_t *); | |
f73dda09 | 64 | |
5e13499c | 65 | /* Standard error message to use when encountering an invalid array subscript */ |
d3ad40de | 66 | const char * const bash_badsub_errmsg = N_("bad array subscript"); |
5e13499c | 67 | |
f73dda09 JA |
68 | /* **************************************************************** */ |
69 | /* */ | |
70 | /* Functions to manipulate array variables and perform assignments */ | |
71 | /* */ | |
72 | /* **************************************************************** */ | |
73 | ||
74 | /* Convert a shell variable to an array variable. The original value is | |
75 | saved as array[0]. */ | |
76 | SHELL_VAR * | |
a61ffa78 | 77 | convert_var_to_array (SHELL_VAR *var) |
f73dda09 JA |
78 | { |
79 | char *oldval; | |
80 | ARRAY *array; | |
81 | ||
82 | oldval = value_cell (var); | |
7117c2d2 | 83 | array = array_create (); |
d3a24ed2 CR |
84 | if (oldval) |
85 | array_insert (array, 0, oldval); | |
f73dda09 JA |
86 | |
87 | FREE (value_cell (var)); | |
7117c2d2 JA |
88 | var_setarray (var, array); |
89 | ||
90 | /* these aren't valid anymore */ | |
91 | var->dynamic_value = (sh_var_value_func_t *)NULL; | |
92 | var->assign_func = (sh_var_assign_func_t *)NULL; | |
f73dda09 JA |
93 | |
94 | INVALIDATE_EXPORTSTR (var); | |
633e5c6d CR |
95 | if (exported_p (var)) |
96 | array_needs_making++; | |
f73dda09 JA |
97 | |
98 | VSETATTR (var, att_array); | |
87d2ae2a CR |
99 | if (oldval) |
100 | VUNSETATTR (var, att_invisible); | |
f73dda09 | 101 | |
3475994a CR |
102 | /* Make sure it's not marked as an associative array any more */ |
103 | VUNSETATTR (var, att_assoc); | |
104 | ||
bddda3d2 CR |
105 | /* Since namerefs can't be array variables, turn off nameref attribute */ |
106 | VUNSETATTR (var, att_nameref); | |
107 | ||
f73dda09 JA |
108 | return var; |
109 | } | |
110 | ||
fdf670ea CR |
111 | /* Convert a shell variable to an array variable. The original value is |
112 | saved as array[0]. */ | |
113 | SHELL_VAR * | |
a61ffa78 | 114 | convert_var_to_assoc (SHELL_VAR *var) |
fdf670ea CR |
115 | { |
116 | char *oldval; | |
117 | HASH_TABLE *hash; | |
118 | ||
119 | oldval = value_cell (var); | |
120 | hash = assoc_create (0); | |
121 | if (oldval) | |
af98a2a6 | 122 | assoc_insert (hash, savestring ("0"), oldval); |
fdf670ea CR |
123 | |
124 | FREE (value_cell (var)); | |
125 | var_setassoc (var, hash); | |
126 | ||
127 | /* these aren't valid anymore */ | |
128 | var->dynamic_value = (sh_var_value_func_t *)NULL; | |
129 | var->assign_func = (sh_var_assign_func_t *)NULL; | |
130 | ||
131 | INVALIDATE_EXPORTSTR (var); | |
132 | if (exported_p (var)) | |
133 | array_needs_making++; | |
134 | ||
135 | VSETATTR (var, att_assoc); | |
87d2ae2a CR |
136 | if (oldval) |
137 | VUNSETATTR (var, att_invisible); | |
fdf670ea | 138 | |
3475994a CR |
139 | /* Make sure it's not marked as an indexed array any more */ |
140 | VUNSETATTR (var, att_array); | |
141 | ||
bddda3d2 CR |
142 | /* Since namerefs can't be array variables, turn off nameref attribute */ |
143 | VUNSETATTR (var, att_nameref); | |
144 | ||
fdf670ea CR |
145 | return var; |
146 | } | |
147 | ||
861a1900 | 148 | char * |
b2613ad1 | 149 | make_array_variable_value (SHELL_VAR *entry, arrayind_t ind, const char *key, const char *value, int flags) |
d11b8b46 CR |
150 | { |
151 | SHELL_VAR *dentry; | |
152 | char *newval; | |
153 | ||
154 | /* If we're appending, we need the old value of the array reference, so | |
155 | fake out make_variable_value with a dummy SHELL_VAR */ | |
156 | if (flags & ASS_APPEND) | |
157 | { | |
158 | dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR)); | |
159 | dentry->name = savestring (entry->name); | |
fdf670ea CR |
160 | if (assoc_p (entry)) |
161 | newval = assoc_reference (assoc_cell (entry), key); | |
162 | else | |
163 | newval = array_reference (array_cell (entry), ind); | |
d11b8b46 CR |
164 | if (newval) |
165 | dentry->value = savestring (newval); | |
166 | else | |
167 | { | |
168 | dentry->value = (char *)xmalloc (1); | |
169 | dentry->value[0] = '\0'; | |
170 | } | |
171 | dentry->exportstr = 0; | |
fdf670ea | 172 | dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported); |
d11b8b46 CR |
173 | /* Leave the rest of the members uninitialized; the code doesn't look |
174 | at them. */ | |
175 | newval = make_variable_value (dentry, value, flags); | |
176 | dispose_variable (dentry); | |
177 | } | |
178 | else | |
179 | newval = make_variable_value (entry, value, flags); | |
180 | ||
861a1900 CR |
181 | return newval; |
182 | } | |
194cfc28 CR |
183 | |
184 | /* Assign HASH[KEY]=VALUE according to FLAGS. ENTRY is an associative array | |
185 | variable; HASH is the hash table to assign into. HASH may or may not be | |
186 | the hash table associated with ENTRY; if it's not, the caller takes care | |
187 | of it. | |
188 | XXX - make sure that any dynamic associative array variables recreate the | |
189 | hash table on each assignment. BASH_CMDS and BASH_ALIASES already do this */ | |
190 | static SHELL_VAR * | |
b2613ad1 | 191 | bind_assoc_var_internal (SHELL_VAR *entry, HASH_TABLE *hash, char *key, const char *value, int flags) |
194cfc28 CR |
192 | { |
193 | char *newval; | |
194 | ||
195 | /* Use the existing array contents to expand the value */ | |
196 | newval = make_array_variable_value (entry, 0, key, value, flags); | |
197 | ||
198 | if (entry->assign_func) | |
199 | (*entry->assign_func) (entry, newval, 0, key); | |
200 | else | |
201 | assoc_insert (hash, key, newval); | |
202 | ||
203 | FREE (newval); | |
204 | ||
205 | VUNSETATTR (entry, att_invisible); /* no longer invisible */ | |
206 | ||
207 | /* check mark_modified_variables if we ever want to export array vars */ | |
208 | return (entry); | |
209 | } | |
210 | ||
211 | /* Perform ENTRY[IND]=VALUE or ENTRY[KEY]=VALUE. This is not called for every | |
212 | assignment to an associative array; see assign_compound_array_list below. */ | |
861a1900 | 213 | static SHELL_VAR * |
b2613ad1 | 214 | bind_array_var_internal (SHELL_VAR *entry, arrayind_t ind, char *key, const char *value, int flags) |
861a1900 CR |
215 | { |
216 | char *newval; | |
217 | ||
218 | newval = make_array_variable_value (entry, ind, key, value, flags); | |
219 | ||
d11b8b46 | 220 | if (entry->assign_func) |
fdf670ea CR |
221 | (*entry->assign_func) (entry, newval, ind, key); |
222 | else if (assoc_p (entry)) | |
223 | assoc_insert (assoc_cell (entry), key, newval); | |
d11b8b46 CR |
224 | else |
225 | array_insert (array_cell (entry), ind, newval); | |
226 | FREE (newval); | |
227 | ||
d2465f43 | 228 | VUNSETATTR (entry, att_invisible); /* no longer invisible */ |
c2ccaa21 CR |
229 | |
230 | /* check mark_modified_variables if we ever want to export array vars */ | |
d11b8b46 CR |
231 | return (entry); |
232 | } | |
233 | ||
f73dda09 JA |
234 | /* Perform an array assignment name[ind]=value. If NAME already exists and |
235 | is not an array, and IND is 0, perform name=value instead. If NAME exists | |
236 | and is not an array, and IND is not 0, convert it into an array with the | |
237 | existing value as name[0]. | |
238 | ||
239 | If NAME does not exist, just create an array variable, no matter what | |
240 | IND's value may be. */ | |
241 | SHELL_VAR * | |
b2613ad1 | 242 | bind_array_variable (const char *name, arrayind_t ind, const char *value, int flags) |
f73dda09 JA |
243 | { |
244 | SHELL_VAR *entry; | |
f73dda09 | 245 | |
348a457e | 246 | entry = find_shell_variable (name); |
f73dda09 | 247 | |
bddda3d2 CR |
248 | if (entry == (SHELL_VAR *) 0) |
249 | { | |
250 | /* Is NAME a nameref variable that points to an unset variable? */ | |
251 | entry = find_variable_nameref_for_create (name, 0); | |
252 | if (entry == INVALID_NAMEREF_VALUE) | |
253 | return ((SHELL_VAR *)0); | |
254 | if (entry && nameref_p (entry)) | |
255 | entry = make_new_array_variable (nameref_cell (entry)); | |
256 | } | |
f73dda09 JA |
257 | if (entry == (SHELL_VAR *) 0) |
258 | entry = make_new_array_variable (name); | |
09f70f2f | 259 | else if ((readonly_p (entry) && (flags&ASS_FORCE) == 0) || noassign_p (entry)) |
f73dda09 JA |
260 | { |
261 | if (readonly_p (entry)) | |
7117c2d2 | 262 | err_readonly (name); |
f73dda09 JA |
263 | return (entry); |
264 | } | |
265 | else if (array_p (entry) == 0) | |
266 | entry = convert_var_to_array (entry); | |
267 | ||
268 | /* ENTRY is an array variable, and ARRAY points to the value. */ | |
fdf670ea | 269 | return (bind_array_var_internal (entry, ind, 0, value, flags)); |
f73dda09 JA |
270 | } |
271 | ||
6a8fd0ed | 272 | SHELL_VAR * |
a61ffa78 | 273 | bind_array_element (SHELL_VAR *entry, arrayind_t ind, char *value, int flags) |
6a8fd0ed | 274 | { |
fdf670ea | 275 | return (bind_array_var_internal (entry, ind, 0, value, flags)); |
6a8fd0ed CR |
276 | } |
277 | ||
fdf670ea | 278 | SHELL_VAR * |
b2613ad1 | 279 | bind_assoc_variable (SHELL_VAR *entry, const char *name, char *key, const char *value, int flags) |
fdf670ea | 280 | { |
09f70f2f | 281 | if ((readonly_p (entry) && (flags&ASS_FORCE) == 0) || noassign_p (entry)) |
fdf670ea CR |
282 | { |
283 | if (readonly_p (entry)) | |
284 | err_readonly (name); | |
285 | return (entry); | |
286 | } | |
287 | ||
194cfc28 | 288 | return (bind_assoc_var_internal (entry, assoc_cell (entry), key, value, flags)); |
fdf670ea CR |
289 | } |
290 | ||
b2b78a63 CR |
291 | inline void |
292 | init_eltstate (array_eltstate_t *estatep) | |
293 | { | |
294 | if (estatep) | |
295 | { | |
296 | estatep->type = ARRAY_INVALID; | |
297 | estatep->subtype = 0; | |
298 | estatep->key = estatep->value = 0; | |
299 | estatep->ind = INTMAX_MIN; | |
300 | } | |
301 | } | |
302 | ||
303 | inline void | |
304 | flush_eltstate (array_eltstate_t *estatep) | |
305 | { | |
306 | if (estatep) | |
307 | FREE (estatep->key); | |
308 | } | |
309 | ||
f73dda09 | 310 | /* Parse NAME, a lhs of an assignment statement of the form v[s], and |
06db13a4 CR |
311 | assign VALUE to that array element by calling bind_array_variable(). |
312 | Flags are ASS_ assignment flags */ | |
f73dda09 | 313 | SHELL_VAR * |
b2613ad1 | 314 | assign_array_element (const char *name, const char *value, int flags, array_eltstate_t *estatep) |
f73dda09 | 315 | { |
276cb932 | 316 | char *sub, *vname; |
1d17c604 | 317 | int sublen, isassoc, avflags; |
2e412574 | 318 | SHELL_VAR *entry; |
f73dda09 | 319 | |
1d17c604 CR |
320 | avflags = 0; |
321 | if (flags & ASS_NOEXPAND) | |
322 | avflags |= AV_NOEXPAND; | |
323 | if (flags & ASS_ONEWORD) | |
324 | avflags |= AV_ONEWORD; | |
325 | vname = array_variable_name (name, avflags, &sub, &sublen); | |
f73dda09 JA |
326 | |
327 | if (vname == 0) | |
328 | return ((SHELL_VAR *)NULL); | |
329 | ||
3d31a311 CR |
330 | entry = find_variable (vname); |
331 | isassoc = entry && assoc_p (entry); | |
332 | ||
3fd77612 CR |
333 | /* We don't allow assignment to `*' or `@' associative array keys if the |
334 | caller hasn't told us the subscript has already been expanded | |
335 | (ASS_NOEXPAND). If the caller has explicitly told us it's ok | |
336 | (ASS_ALLOWALLSUB) we allow it. */ | |
337 | if (((isassoc == 0 || (flags & (ASS_NOEXPAND|ASS_ALLOWALLSUB)) == 0) && | |
338 | (ALL_ELEMENT_SUB (sub[0]) && sub[1] == ']')) || | |
7b024db8 CR |
339 | (sublen <= 1) || |
340 | (sub[sublen] != '\0')) /* sanity check */ | |
f73dda09 JA |
341 | { |
342 | free (vname); | |
7117c2d2 | 343 | err_badarraysub (name); |
f73dda09 JA |
344 | return ((SHELL_VAR *)NULL); |
345 | } | |
346 | ||
b2b78a63 | 347 | entry = assign_array_element_internal (entry, name, vname, sub, sublen, value, flags, estatep); |
276cb932 | 348 | |
d70b5339 CR |
349 | #if ARRAY_EXPORT |
350 | if (entry && exported_p (entry)) | |
351 | { | |
352 | INVALIDATE_EXPORTSTR (entry); | |
353 | array_needs_making = 1; | |
354 | } | |
355 | #endif | |
356 | ||
276cb932 CR |
357 | free (vname); |
358 | return entry; | |
359 | } | |
360 | ||
361 | static SHELL_VAR * | |
b2613ad1 CR |
362 | assign_array_element_internal (SHELL_VAR *entry, const char *name, char *vname, |
363 | char *sub, int sublen, const char *value, | |
a61ffa78 | 364 | int flags, array_eltstate_t *estatep) |
276cb932 | 365 | { |
b2b78a63 | 366 | char *akey, *nkey; |
276cb932 | 367 | arrayind_t ind; |
5f2dd5ff | 368 | char *newval; |
fdf670ea | 369 | |
b2b78a63 CR |
370 | /* rely on the caller to initialize estatep */ |
371 | ||
fdf670ea | 372 | if (entry && assoc_p (entry)) |
f73dda09 | 373 | { |
fdf670ea | 374 | sub[sublen-1] = '\0'; |
06db13a4 | 375 | if ((flags & ASS_NOEXPAND) == 0) |
35bc7025 | 376 | akey = expand_subscript_string (sub, 0); /* [ */ |
06db13a4 CR |
377 | else |
378 | akey = savestring (sub); | |
fdf670ea CR |
379 | sub[sublen-1] = ']'; |
380 | if (akey == 0 || *akey == 0) | |
381 | { | |
fdf670ea | 382 | err_badarraysub (name); |
631b20c6 | 383 | FREE (akey); |
fdf670ea CR |
384 | return ((SHELL_VAR *)NULL); |
385 | } | |
b2b78a63 CR |
386 | if (estatep) |
387 | nkey = savestring (akey); /* assoc_insert/assoc_replace frees akey */ | |
fdf670ea | 388 | entry = bind_assoc_variable (entry, vname, akey, value, flags); |
b2b78a63 CR |
389 | if (estatep) |
390 | { | |
391 | estatep->type = ARRAY_ASSOC; | |
392 | estatep->key = nkey; | |
393 | estatep->value = entry ? assoc_reference (assoc_cell (entry), nkey) : 0; | |
394 | } | |
fdf670ea CR |
395 | } |
396 | else | |
397 | { | |
e297b059 | 398 | ind = array_expand_index (entry, sub, sublen, 0); |
a7ad477f | 399 | /* negative subscripts to indexed arrays count back from end */ |
adbaf2b3 CR |
400 | if (entry && ind < 0) |
401 | ind = (array_p (entry) ? array_max_index (array_cell (entry)) : 0) + 1 + ind; | |
fdf670ea CR |
402 | if (ind < 0) |
403 | { | |
fdf670ea CR |
404 | err_badarraysub (name); |
405 | return ((SHELL_VAR *)NULL); | |
406 | } | |
407 | entry = bind_array_variable (vname, ind, value, flags); | |
b2b78a63 CR |
408 | if (estatep) |
409 | { | |
410 | estatep->type = ARRAY_INDEXED; | |
411 | estatep->ind = ind; | |
412 | estatep->value = entry ? array_reference (array_cell (entry), ind) : 0; | |
413 | } | |
f73dda09 | 414 | } |
f73dda09 | 415 | |
f73dda09 JA |
416 | return (entry); |
417 | } | |
418 | ||
419 | /* Find the array variable corresponding to NAME. If there is no variable, | |
420 | create a new array variable. If the variable exists but is not an array, | |
fdf670ea | 421 | convert it to an indexed array. If FLAGS&1 is non-zero, an existing |
f73dda09 | 422 | variable is checked for the readonly or noassign attribute in preparation |
fdf670ea CR |
423 | for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we |
424 | create an associative array. */ | |
f73dda09 | 425 | SHELL_VAR * |
b2613ad1 | 426 | find_or_make_array_variable (const char *name, int flags) |
f73dda09 JA |
427 | { |
428 | SHELL_VAR *var; | |
429 | ||
430 | var = find_variable (name); | |
d42cb8c1 CR |
431 | if (var == 0) |
432 | { | |
433 | /* See if we have a nameref pointing to a variable that hasn't been | |
434 | created yet. */ | |
814e1ff5 CR |
435 | var = find_variable_last_nameref (name, 1); |
436 | if (var && nameref_p (var) && invisible_p (var)) | |
437 | { | |
438 | internal_warning (_("%s: removing nameref attribute"), name); | |
439 | VUNSETATTR (var, att_nameref); | |
440 | } | |
d42cb8c1 | 441 | if (var && nameref_p (var)) |
814e1ff5 | 442 | { |
80c3b1d4 | 443 | if (valid_nameref_value (nameref_cell (var), 2) == 0) |
814e1ff5 CR |
444 | { |
445 | sh_invalidid (nameref_cell (var)); | |
446 | return ((SHELL_VAR *)NULL); | |
447 | } | |
448 | var = (flags & 2) ? make_new_assoc_variable (nameref_cell (var)) : make_new_array_variable (nameref_cell (var)); | |
449 | } | |
d42cb8c1 | 450 | } |
f73dda09 JA |
451 | |
452 | if (var == 0) | |
fdf670ea CR |
453 | var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name); |
454 | else if ((flags & 1) && (readonly_p (var) || noassign_p (var))) | |
f73dda09 JA |
455 | { |
456 | if (readonly_p (var)) | |
7117c2d2 | 457 | err_readonly (name); |
f73dda09 JA |
458 | return ((SHELL_VAR *)NULL); |
459 | } | |
fdf670ea CR |
460 | else if ((flags & 2) && array_p (var)) |
461 | { | |
194cfc28 | 462 | set_exit_status (EXECUTION_FAILURE); |
fdf670ea CR |
463 | report_error (_("%s: cannot convert indexed to associative array"), name); |
464 | return ((SHELL_VAR *)NULL); | |
465 | } | |
b6a567e7 CR |
466 | else if (flags & 2) |
467 | var = assoc_p (var) ? var : convert_var_to_assoc (var); | |
fdf670ea | 468 | else if (array_p (var) == 0 && assoc_p (var) == 0) |
f73dda09 JA |
469 | var = convert_var_to_array (var); |
470 | ||
471 | return (var); | |
472 | } | |
473 | ||
474 | /* Perform a compound assignment statement for array NAME, where VALUE is | |
475 | the text between the parens: NAME=( VALUE ) */ | |
476 | SHELL_VAR * | |
b2613ad1 | 477 | assign_array_from_string (const char *name, char *value, int flags) |
f73dda09 JA |
478 | { |
479 | SHELL_VAR *var; | |
fdf670ea | 480 | int vflags; |
f73dda09 | 481 | |
fdf670ea CR |
482 | vflags = 1; |
483 | if (flags & ASS_MKASSOC) | |
484 | vflags |= 2; | |
485 | ||
486 | var = find_or_make_array_variable (name, vflags); | |
f73dda09 JA |
487 | if (var == 0) |
488 | return ((SHELL_VAR *)NULL); | |
489 | ||
d11b8b46 | 490 | return (assign_array_var_from_string (var, value, flags)); |
f73dda09 JA |
491 | } |
492 | ||
493 | /* Sequentially assign the indices of indexed array variable VAR from the | |
494 | words in LIST. */ | |
495 | SHELL_VAR * | |
a61ffa78 | 496 | assign_array_var_from_word_list (SHELL_VAR *var, WORD_LIST *list, int flags) |
f73dda09 JA |
497 | { |
498 | register arrayind_t i; | |
499 | register WORD_LIST *l; | |
500 | ARRAY *a; | |
501 | ||
d11b8b46 CR |
502 | a = array_cell (var); |
503 | i = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0; | |
504 | ||
505 | for (l = list; l; l = l->next, i++) | |
589afb3c | 506 | bind_array_var_internal (var, i, 0, l->word->word, flags & ~ASS_APPEND); |
60b80a1f CR |
507 | |
508 | VUNSETATTR (var, att_invisible); /* no longer invisible */ | |
509 | ||
f73dda09 JA |
510 | return var; |
511 | } | |
512 | ||
d3ad40de | 513 | WORD_LIST * |
a61ffa78 | 514 | expand_compound_array_assignment (SHELL_VAR *var, char *value, int flags) |
f73dda09 | 515 | { |
f73dda09 | 516 | WORD_LIST *list, *nlist; |
d3ad40de CR |
517 | char *val; |
518 | int ni; | |
f73dda09 | 519 | |
276cb932 CR |
520 | /* This condition is true when invoked from the declare builtin with a |
521 | command like | |
522 | declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")' */ | |
f73dda09 JA |
523 | if (*value == '(') /*)*/ |
524 | { | |
525 | ni = 1; | |
526 | val = extract_array_assignment_list (value, &ni); | |
527 | if (val == 0) | |
d3ad40de | 528 | return (WORD_LIST *)NULL; |
f73dda09 JA |
529 | } |
530 | else | |
531 | val = value; | |
532 | ||
533 | /* Expand the value string into a list of words, performing all the | |
534 | shell expansions including pathname generation and word splitting. */ | |
535 | /* First we split the string on whitespace, using the shell parser | |
536 | (ksh93 seems to do this). */ | |
70d7c643 | 537 | /* XXX - this needs a rethink, maybe use split_at_delims */ |
5e13499c | 538 | list = parse_string_to_word_list (val, 1, "array assign"); |
f73dda09 | 539 | |
70d7c643 CR |
540 | /* If the parser has quoted CTLESC and CTNLNUL with CTLESC in unquoted |
541 | words, we need to remove those here because the code below assumes | |
542 | they are there because they exist in the original word. */ | |
543 | /* XXX - if we rethink parse_string_to_word_list above, change this. */ | |
544 | for (nlist = list; nlist; nlist = nlist->next) | |
545 | if ((nlist->word->flags & W_QUOTED) == 0) | |
546 | remove_quoted_escapes (nlist->word->word); | |
547 | ||
194cfc28 CR |
548 | /* Note that we defer expansion of the assignment statements for associative |
549 | arrays here, so we don't have to scan the subscript and find the ending | |
550 | bracket twice. See the caller below. */ | |
276cb932 CR |
551 | if (var && assoc_p (var)) |
552 | { | |
553 | if (val != value) | |
554 | free (val); | |
555 | return list; | |
556 | } | |
557 | ||
f73dda09 | 558 | /* If we're using [subscript]=value, we need to quote each [ and ] to |
276cb932 CR |
559 | prevent unwanted filename expansion. This doesn't need to be done |
560 | for associative array expansion, since that uses a different expansion | |
561 | function (see assign_compound_array_list below). */ | |
f73dda09 JA |
562 | if (list) |
563 | quote_array_assignment_chars (list); | |
564 | ||
565 | /* Now that we've split it, perform the shell expansions on each | |
566 | word in the list. */ | |
567 | nlist = list ? expand_words_no_vars (list) : (WORD_LIST *)NULL; | |
568 | ||
569 | dispose_words (list); | |
570 | ||
571 | if (val != value) | |
572 | free (val); | |
573 | ||
d3ad40de CR |
574 | return nlist; |
575 | } | |
576 | ||
5f49ef47 CR |
577 | #if ASSOC_KVPAIR_ASSIGNMENT |
578 | static void | |
a61ffa78 | 579 | assign_assoc_from_kvlist (SHELL_VAR *var, WORD_LIST *nlist, HASH_TABLE *h, int flags) |
5f49ef47 CR |
580 | { |
581 | WORD_LIST *list; | |
582 | char *akey, *aval, *k, *v; | |
5f49ef47 CR |
583 | |
584 | for (list = nlist; list; list = list->next) | |
585 | { | |
5f49ef47 CR |
586 | k = list->word->word; |
587 | v = list->next ? list->next->word->word : 0; | |
588 | ||
589 | if (list->next) | |
590 | list = list->next; | |
591 | ||
35bc7025 | 592 | akey = expand_subscript_string (k, 0); |
5f49ef47 CR |
593 | if (akey == 0 || *akey == 0) |
594 | { | |
595 | err_badarraysub (k); | |
596 | FREE (akey); | |
597 | continue; | |
598 | } | |
3fd77612 | 599 | |
35bc7025 | 600 | aval = expand_subscript_string (v, 0); |
5f49ef47 CR |
601 | if (aval == 0) |
602 | { | |
603 | aval = (char *)xmalloc (1); | |
604 | aval[0] = '\0'; /* like do_assignment_internal */ | |
5f49ef47 CR |
605 | } |
606 | ||
607 | bind_assoc_var_internal (var, h, akey, aval, flags); | |
3fd77612 | 608 | free (aval); |
5f49ef47 CR |
609 | } |
610 | } | |
11262b0b CR |
611 | |
612 | /* Return non-zero if L appears to be a key-value pair associative array | |
613 | compound assignment. */ | |
614 | int | |
a61ffa78 | 615 | kvpair_assignment_p (WORD_LIST *l) |
11262b0b CR |
616 | { |
617 | return (l && (l->word->flags & W_ASSIGNMENT) == 0 && l->word->word[0] != '['); /*]*/ | |
618 | } | |
619 | ||
620 | char * | |
b2613ad1 | 621 | expand_and_quote_kvpair_word (const char *w) |
11262b0b | 622 | { |
9928dcb4 | 623 | char *r, *s, *t; |
11262b0b | 624 | |
35bc7025 | 625 | t = w ? expand_subscript_string (w, 0) : 0; |
9928dcb4 CR |
626 | s = (t && strchr (t, CTLESC)) ? quote_escapes (t) : t; |
627 | r = sh_single_quote (s ? s : ""); | |
628 | if (s != t) | |
629 | free (s); | |
11262b0b CR |
630 | free (t); |
631 | return r; | |
632 | } | |
5f49ef47 CR |
633 | #endif |
634 | ||
194cfc28 | 635 | /* Callers ensure that VAR is not NULL. Associative array assignments have not |
c6c7ae81 CR |
636 | been expanded when this is called, or have been expanded once and single- |
637 | quoted, so we don't have to scan through an unquoted expanded subscript to | |
638 | find the ending bracket; indexed array assignments have been expanded and | |
639 | possibly single-quoted to prevent further expansion. | |
640 | ||
194cfc28 CR |
641 | If this is an associative array, we perform the assignments into NHASH and |
642 | set NHASH to be the value of VAR after processing the assignments in NLIST */ | |
d3ad40de | 643 | void |
a61ffa78 | 644 | assign_compound_array_list (SHELL_VAR *var, WORD_LIST *nlist, int flags) |
d3ad40de CR |
645 | { |
646 | ARRAY *a; | |
194cfc28 | 647 | HASH_TABLE *h, *nhash; |
d3ad40de | 648 | WORD_LIST *list; |
06c3a575 | 649 | char *w, *val, *nval, *savecmd; |
276cb932 | 650 | int len, iflags, free_val; |
d3ad40de | 651 | arrayind_t ind, last_ind; |
fdf670ea | 652 | char *akey; |
d3ad40de | 653 | |
fdf670ea | 654 | a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0; |
194cfc28 | 655 | nhash = h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0; |
fdf670ea CR |
656 | |
657 | akey = (char *)0; | |
658 | ind = 0; | |
f73dda09 JA |
659 | |
660 | /* Now that we are ready to assign values to the array, kill the existing | |
661 | value. */ | |
fdf670ea CR |
662 | if ((flags & ASS_APPEND) == 0) |
663 | { | |
824dfe68 | 664 | if (a && array_p (var)) |
fdf670ea | 665 | array_flush (a); |
824dfe68 | 666 | else if (h && assoc_p (var)) |
194cfc28 | 667 | nhash = assoc_create (h->nbuckets); |
fdf670ea CR |
668 | } |
669 | ||
670 | last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0; | |
f73dda09 | 671 | |
5f49ef47 | 672 | #if ASSOC_KVPAIR_ASSIGNMENT |
11262b0b | 673 | if (assoc_p (var) && kvpair_assignment_p (nlist)) |
5f49ef47 CR |
674 | { |
675 | iflags = flags & ~ASS_APPEND; | |
676 | assign_assoc_from_kvlist (var, nlist, nhash, iflags); | |
677 | if (nhash && nhash != h) | |
678 | { | |
679 | h = assoc_cell (var); | |
680 | var_setassoc (var, nhash); | |
681 | assoc_dispose (h); | |
682 | } | |
683 | return; | |
684 | } | |
685 | #endif | |
686 | ||
d11b8b46 | 687 | for (list = nlist; list; list = list->next) |
f73dda09 | 688 | { |
09f70f2f CR |
689 | /* Don't allow var+=(values) to make assignments in VALUES append to |
690 | existing values by default. */ | |
691 | iflags = flags & ~ASS_APPEND; | |
f73dda09 JA |
692 | w = list->word->word; |
693 | ||
694 | /* We have a word of the form [ind]=value */ | |
5e13499c | 695 | if ((list->word->flags & W_ASSIGNMENT) && w[0] == '[') |
f73dda09 | 696 | { |
276cb932 CR |
697 | /* Don't have to handle embedded quotes specially any more, since |
698 | associative array subscripts have not been expanded yet (see | |
699 | above). */ | |
700 | len = skipsubscript (w, 0, 0); | |
f73dda09 | 701 | |
d11b8b46 CR |
702 | /* XXX - changes for `+=' */ |
703 | if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '='))) | |
f73dda09 | 704 | { |
fdf670ea CR |
705 | if (assoc_p (var)) |
706 | { | |
707 | err_badarraysub (w); | |
708 | continue; | |
709 | } | |
d11b8b46 | 710 | nval = make_variable_value (var, w, flags); |
f73dda09 | 711 | if (var->assign_func) |
fdf670ea | 712 | (*var->assign_func) (var, nval, last_ind, 0); |
f73dda09 | 713 | else |
7117c2d2 | 714 | array_insert (a, last_ind, nval); |
f73dda09 JA |
715 | FREE (nval); |
716 | last_ind++; | |
717 | continue; | |
718 | } | |
719 | ||
720 | if (len == 1) | |
721 | { | |
7117c2d2 | 722 | err_badarraysub (w); |
f73dda09 JA |
723 | continue; |
724 | } | |
725 | ||
3fd77612 | 726 | if (ALL_ELEMENT_SUB (w[1]) && len == 2 && array_p (var)) |
f73dda09 | 727 | { |
194cfc28 | 728 | set_exit_status (EXECUTION_FAILURE); |
3fd77612 | 729 | report_error (_("%s: cannot assign to non-numeric index"), w); |
f73dda09 JA |
730 | continue; |
731 | } | |
732 | ||
fdf670ea | 733 | if (array_p (var)) |
f73dda09 | 734 | { |
e297b059 | 735 | ind = array_expand_index (var, w + 1, len, 0); |
a7ad477f CR |
736 | /* negative subscripts to indexed arrays count back from end */ |
737 | if (ind < 0) | |
738 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
fdf670ea CR |
739 | if (ind < 0) |
740 | { | |
741 | err_badarraysub (w); | |
742 | continue; | |
743 | } | |
744 | ||
745 | last_ind = ind; | |
746 | } | |
747 | else if (assoc_p (var)) | |
748 | { | |
276cb932 CR |
749 | /* This is not performed above, see expand_compound_array_assignment */ |
750 | w[len] = '\0'; /*[*/ | |
35bc7025 | 751 | akey = expand_subscript_string (w+1, 0); |
276cb932 CR |
752 | w[len] = ']'; |
753 | /* And we need to expand the value also, see below */ | |
fdf670ea CR |
754 | if (akey == 0 || *akey == 0) |
755 | { | |
756 | err_badarraysub (w); | |
631b20c6 | 757 | FREE (akey); |
fdf670ea CR |
758 | continue; |
759 | } | |
f73dda09 | 760 | } |
fdf670ea | 761 | |
d3ad40de | 762 | /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */ |
d11b8b46 CR |
763 | if (w[len + 1] == '+' && w[len + 2] == '=') |
764 | { | |
d3ad40de | 765 | iflags |= ASS_APPEND; |
d11b8b46 CR |
766 | val = w + len + 3; |
767 | } | |
768 | else | |
276cb932 | 769 | val = w + len + 2; |
f73dda09 | 770 | } |
fdf670ea CR |
771 | else if (assoc_p (var)) |
772 | { | |
194cfc28 | 773 | set_exit_status (EXECUTION_FAILURE); |
fdf670ea CR |
774 | report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w); |
775 | continue; | |
776 | } | |
f73dda09 JA |
777 | else /* No [ind]=value, just a stray `=' */ |
778 | { | |
779 | ind = last_ind; | |
780 | val = w; | |
781 | } | |
782 | ||
276cb932 CR |
783 | free_val = 0; |
784 | /* See above; we need to expand the value here */ | |
785 | if (assoc_p (var)) | |
786 | { | |
35bc7025 | 787 | val = expand_subscript_string (val, 0); |
e2f12fdf CR |
788 | if (val == 0) |
789 | { | |
790 | val = (char *)xmalloc (1); | |
791 | val[0] = '\0'; /* like do_assignment_internal */ | |
792 | } | |
276cb932 CR |
793 | free_val = 1; |
794 | } | |
795 | ||
06c3a575 | 796 | savecmd = this_command_name; |
f73dda09 | 797 | if (integer_p (var)) |
2e725f73 | 798 | this_command_name = 0; /* no command name for errors */ |
194cfc28 CR |
799 | if (assoc_p (var)) |
800 | bind_assoc_var_internal (var, nhash, akey, val, iflags); | |
801 | else | |
802 | bind_array_var_internal (var, ind, akey, val, iflags); | |
f73dda09 | 803 | last_ind++; |
06c3a575 | 804 | this_command_name = savecmd; |
276cb932 CR |
805 | |
806 | if (free_val) | |
807 | free (val); | |
f73dda09 | 808 | } |
194cfc28 CR |
809 | |
810 | if (assoc_p (var) && nhash && nhash != h) | |
811 | { | |
812 | h = assoc_cell (var); | |
813 | var_setassoc (var, nhash); | |
814 | assoc_dispose (h); | |
815 | } | |
d3ad40de CR |
816 | } |
817 | ||
818 | /* Perform a compound array assignment: VAR->name=( VALUE ). The | |
819 | VALUE has already had the parentheses stripped. */ | |
820 | SHELL_VAR * | |
a61ffa78 | 821 | assign_array_var_from_string (SHELL_VAR *var, char *value, int flags) |
d3ad40de CR |
822 | { |
823 | WORD_LIST *nlist; | |
824 | ||
825 | if (value == 0) | |
826 | return var; | |
827 | ||
fdf670ea | 828 | nlist = expand_compound_array_assignment (var, value, flags); |
d3ad40de | 829 | assign_compound_array_list (var, nlist, flags); |
f73dda09 | 830 | |
d3ad40de CR |
831 | if (nlist) |
832 | dispose_words (nlist); | |
60b80a1f CR |
833 | |
834 | if (var) | |
835 | VUNSETATTR (var, att_invisible); /* no longer invisible */ | |
836 | ||
f73dda09 JA |
837 | return (var); |
838 | } | |
839 | ||
fdf670ea CR |
840 | /* Quote globbing chars and characters in $IFS before the `=' in an assignment |
841 | statement (usually a compound array assignment) to protect them from | |
842 | unwanted filename expansion or word splitting. */ | |
4ac1ff98 | 843 | static char * |
a61ffa78 | 844 | quote_assign (const char *string) |
4ac1ff98 CR |
845 | { |
846 | size_t slen; | |
847 | int saw_eq; | |
3eb2d94a | 848 | char *temp, *t, *subs; |
4ac1ff98 | 849 | const char *s, *send; |
3eb2d94a | 850 | int ss, se; |
4ac1ff98 CR |
851 | DECLARE_MBSTATE; |
852 | ||
853 | slen = strlen (string); | |
854 | send = string + slen; | |
855 | ||
856 | t = temp = (char *)xmalloc (slen * 2 + 1); | |
857 | saw_eq = 0; | |
858 | for (s = string; *s; ) | |
859 | { | |
860 | if (*s == '=') | |
861 | saw_eq = 1; | |
3eb2d94a CR |
862 | if (saw_eq == 0 && *s == '[') /* looks like a subscript */ |
863 | { | |
864 | ss = s - string; | |
865 | se = skipsubscript (string, ss, 0); | |
866 | subs = substring (s, ss, se); | |
867 | *t++ = '\\'; | |
868 | strcpy (t, subs); | |
869 | t += se - ss; | |
870 | *t++ = '\\'; | |
871 | *t++ = ']'; | |
872 | s += se + 1; | |
873 | free (subs); | |
874 | continue; | |
875 | } | |
4ac1ff98 CR |
876 | if (saw_eq == 0 && (glob_char_p (s) || isifs (*s))) |
877 | *t++ = '\\'; | |
878 | ||
879 | COPY_CHAR_P (t, s, send); | |
880 | } | |
881 | *t = '\0'; | |
882 | return temp; | |
883 | } | |
884 | ||
e33aa281 | 885 | /* Take a word W of the form [IND]=VALUE and transform it to ['IND']='VALUE' |
c6c7ae81 CR |
886 | to prevent further expansion. This is called for compound assignments to |
887 | indexed arrays. W has already undergone word expansions. If W has no [IND]=, | |
888 | just single-quote and return it. */ | |
889 | static char * | |
a61ffa78 | 890 | quote_compound_array_word (char *w, int type) |
c6c7ae81 CR |
891 | { |
892 | char *nword, *sub, *value, *t; | |
893 | int ind, wlen, i; | |
894 | ||
895 | if (w[0] != LBRACK) | |
9928dcb4 | 896 | return (sh_single_quote (w)); /* XXX - quote CTLESC */ |
c6c7ae81 CR |
897 | ind = skipsubscript (w, 0, 0); |
898 | if (w[ind] != RBRACK) | |
9928dcb4 | 899 | return (sh_single_quote (w)); /* XXX - quote CTLESC */ |
c6c7ae81 CR |
900 | |
901 | wlen = strlen (w); | |
902 | w[ind] = '\0'; | |
70d7c643 CR |
903 | t = (strchr (w+1, CTLESC)) ? quote_escapes (w+1) : w+1; |
904 | sub = sh_single_quote (t); | |
905 | if (t != w+1) | |
906 | free (t); | |
c6c7ae81 CR |
907 | w[ind] = RBRACK; |
908 | ||
909 | nword = xmalloc (wlen * 4 + 5); /* wlen*4 is max single quoted length */ | |
910 | nword[0] = LBRACK; | |
911 | i = STRLEN (sub); | |
912 | memcpy (nword+1, sub, i); | |
6650b4de | 913 | free (sub); |
c6c7ae81 CR |
914 | i++; /* accommodate the opening LBRACK */ |
915 | nword[i++] = w[ind++]; /* RBRACK */ | |
916 | if (w[ind] == '+') | |
917 | nword[i++] = w[ind++]; | |
918 | nword[i++] = w[ind++]; | |
9928dcb4 CR |
919 | t = (strchr (w+ind, CTLESC)) ? quote_escapes (w+ind) : w+ind; |
920 | value = sh_single_quote (t); | |
921 | if (t != w+ind) | |
922 | free (t); | |
c6c7ae81 CR |
923 | strcpy (nword + i, value); |
924 | ||
925 | return nword; | |
926 | } | |
927 | ||
928 | /* Expand the key and value in W, which is of the form [KEY]=VALUE, and | |
929 | reconstruct W with the expanded and single-quoted version: | |
930 | ['expanded-key']='expanded-value'. If there is no [KEY]=, single-quote the | |
931 | word and return it. Very similar to previous function, but does not assume | |
932 | W has already been expanded, and expands the KEY and VALUE separately. | |
933 | Used for compound assignments to associative arrays that are arguments to | |
934 | declaration builtins (declare -A a=( list )). */ | |
935 | char * | |
a61ffa78 | 936 | expand_and_quote_assoc_word (char *w, int type) |
c6c7ae81 | 937 | { |
9928dcb4 | 938 | char *nword, *key, *value, *s, *t; |
c6c7ae81 CR |
939 | int ind, wlen, i; |
940 | ||
941 | if (w[0] != LBRACK) | |
9928dcb4 | 942 | return (sh_single_quote (w)); /* XXX - quote_escapes */ |
c6c7ae81 CR |
943 | ind = skipsubscript (w, 0, 0); |
944 | if (w[ind] != RBRACK) | |
9928dcb4 | 945 | return (sh_single_quote (w)); /* XXX - quote_escapes */ |
c6c7ae81 CR |
946 | |
947 | w[ind] = '\0'; | |
35bc7025 | 948 | t = expand_subscript_string (w+1, 0); |
70d7c643 CR |
949 | s = (t && strchr (t, CTLESC)) ? quote_escapes (t) : t; |
950 | key = sh_single_quote (s ? s : ""); | |
951 | if (s != t) | |
952 | free (s); | |
c6c7ae81 | 953 | w[ind] = RBRACK; |
c6c7ae81 CR |
954 | free (t); |
955 | ||
956 | wlen = STRLEN (key); | |
957 | nword = xmalloc (wlen + 5); | |
958 | nword[0] = LBRACK; | |
959 | memcpy (nword+1, key, wlen); | |
960 | i = wlen + 1; /* accommodate the opening LBRACK */ | |
961 | ||
962 | nword[i++] = w[ind++]; /* RBRACK */ | |
963 | if (w[ind] == '+') | |
964 | nword[i++] = w[ind++]; | |
965 | nword[i++] = w[ind++]; | |
966 | ||
35bc7025 | 967 | t = expand_subscript_string (w+ind, 0); |
9928dcb4 CR |
968 | s = (t && strchr (t, CTLESC)) ? quote_escapes (t) : t; |
969 | value = sh_single_quote (s ? s : ""); | |
970 | if (s != t) | |
971 | free (s); | |
c6c7ae81 CR |
972 | free (t); |
973 | nword = xrealloc (nword, wlen + 5 + STRLEN (value)); | |
974 | strcpy (nword + i, value); | |
975 | ||
976 | free (key); | |
977 | free (value); | |
978 | ||
979 | return nword; | |
980 | } | |
981 | ||
982 | /* For each word in a compound array assignment, if the word looks like | |
983 | [ind]=value, single-quote ind and value, but leave the brackets and | |
ce3e1a8c CR |
984 | the = sign (and any `+') alone. If it's not an assignment, just single- |
985 | quote the word. This is used for indexed arrays. */ | |
c6c7ae81 | 986 | void |
a61ffa78 | 987 | quote_compound_array_list (WORD_LIST *list, int type) |
c6c7ae81 | 988 | { |
9928dcb4 | 989 | char *s, *t; |
c6c7ae81 CR |
990 | WORD_LIST *l; |
991 | ||
992 | for (l = list; l; l = l->next) | |
993 | { | |
ce3e1a8c | 994 | if (l->word == 0 || l->word->word == 0) |
c6c7ae81 CR |
995 | continue; /* should not happen, but just in case... */ |
996 | if ((l->word->flags & W_ASSIGNMENT) == 0) | |
9928dcb4 | 997 | { |
9928dcb4 CR |
998 | s = (strchr (l->word->word, CTLESC)) ? quote_escapes (l->word->word) : l->word->word; |
999 | t = sh_single_quote (s); | |
1000 | if (s != l->word->word) | |
1001 | free (s); | |
9928dcb4 | 1002 | } |
c6c7ae81 CR |
1003 | else |
1004 | t = quote_compound_array_word (l->word->word, type); | |
1005 | free (l->word->word); | |
1006 | l->word->word = t; | |
1007 | } | |
1008 | } | |
1009 | ||
f73dda09 | 1010 | /* For each word in a compound array assignment, if the word looks like |
fdf670ea | 1011 | [ind]=value, quote globbing chars and characters in $IFS before the `='. */ |
f73dda09 | 1012 | static void |
a61ffa78 | 1013 | quote_array_assignment_chars (WORD_LIST *list) |
f73dda09 | 1014 | { |
4ac1ff98 | 1015 | char *nword; |
f73dda09 JA |
1016 | WORD_LIST *l; |
1017 | ||
1018 | for (l = list; l; l = l->next) | |
1019 | { | |
1020 | if (l->word == 0 || l->word->word == 0 || l->word->word[0] == '\0') | |
1021 | continue; /* should not happen, but just in case... */ | |
df0e4bfe CR |
1022 | /* Don't bother if it hasn't been recognized as an assignment or |
1023 | doesn't look like [ind]=value */ | |
1024 | if ((l->word->flags & W_ASSIGNMENT) == 0) | |
1025 | continue; | |
d0ca3503 | 1026 | if (l->word->word[0] != '[' || mbschr (l->word->word, '=') == 0) /* ] */ |
f73dda09 | 1027 | continue; |
df0e4bfe | 1028 | |
4ac1ff98 | 1029 | nword = quote_assign (l->word->word); |
f73dda09 JA |
1030 | free (l->word->word); |
1031 | l->word->word = nword; | |
df0e4bfe | 1032 | l->word->flags |= W_NOGLOB; /* XXX - W_NOSPLIT also? */ |
f73dda09 JA |
1033 | } |
1034 | } | |
1035 | ||
6932f7f5 | 1036 | /* skipsubscript moved to subst.c to use private functions. 2009/02/24. */ |
f73dda09 JA |
1037 | |
1038 | /* This function is called with SUB pointing to just after the beginning | |
1039 | `[' of an array subscript and removes the array element to which SUB | |
1040 | expands from array VAR. A subscript of `*' or `@' unsets the array. */ | |
0e513453 CR |
1041 | /* If FLAGS&1 (VA_NOEXPAND) we don't expand the subscript; we just use it |
1042 | as-is. If FLAGS&VA_ONEWORD, we don't try to use skipsubscript to parse | |
b304aabc CR |
1043 | the subscript, we just assume the subscript ends with a close bracket, |
1044 | if one is present, and use what's inside the brackets. */ | |
f73dda09 | 1045 | int |
a61ffa78 | 1046 | unbind_array_element (SHELL_VAR *var, char *sub, int flags) |
f73dda09 | 1047 | { |
f73dda09 | 1048 | arrayind_t ind; |
fdf670ea | 1049 | char *akey; |
f73dda09 JA |
1050 | ARRAY_ELEMENT *ae; |
1051 | ||
4657c040 CR |
1052 | /* Assume that the caller (unset_builtin) passes us a null-terminated SUB, |
1053 | so we don't have to use VA_ONEWORD or parse the subscript again with | |
1054 | skipsubscript(). */ | |
f73dda09 JA |
1055 | |
1056 | if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0) | |
1057 | { | |
06c3a575 CR |
1058 | if (array_p (var) || assoc_p (var)) |
1059 | { | |
fb4ddc2d | 1060 | if (flags & VA_ALLOWALL) |
fb4ddc2d CR |
1061 | { |
1062 | unbind_variable (var->name); /* XXX -- {array,assoc}_flush ? */ | |
1063 | return (0); | |
1064 | } | |
1065 | /* otherwise we fall through and try to unset element `@' or `*' */ | |
06c3a575 CR |
1066 | } |
1067 | else | |
1068 | return -2; /* don't allow this to unset scalar variables */ | |
f73dda09 | 1069 | } |
fdf670ea CR |
1070 | |
1071 | if (assoc_p (var)) | |
f73dda09 | 1072 | { |
35bc7025 | 1073 | akey = (flags & VA_NOEXPAND) ? sub : expand_subscript_string (sub, 0); |
fdf670ea CR |
1074 | if (akey == 0 || *akey == 0) |
1075 | { | |
1076 | builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg)); | |
631b20c6 | 1077 | FREE (akey); |
fdf670ea CR |
1078 | return -1; |
1079 | } | |
1080 | assoc_remove (assoc_cell (var), akey); | |
61c476d2 CR |
1081 | if (akey != sub) |
1082 | free (akey); | |
f73dda09 | 1083 | } |
06c3a575 | 1084 | else if (array_p (var)) |
fdf670ea | 1085 | { |
b304aabc CR |
1086 | if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0) |
1087 | { | |
1088 | /* We can go several ways here: | |
1089 | 1) remove the array (backwards compatible) | |
1090 | 2) empty the array (new behavior) | |
1091 | 3) do nothing; treat the `@' or `*' as an expression and throw | |
1092 | an error | |
1093 | */ | |
1094 | /* Behavior 1 */ | |
1095 | if (shell_compatibility_level <= 51) | |
1096 | { | |
1097 | unbind_variable (name_cell (var)); | |
1098 | return 0; | |
1099 | } | |
1100 | else /* Behavior 2 */ | |
1101 | { | |
1102 | array_flush (array_cell (var)); | |
1103 | return 0; | |
1104 | } | |
1105 | /* Fall through for behavior 3 */ | |
1106 | } | |
4657c040 | 1107 | ind = array_expand_index (var, sub, strlen (sub) + 1, 0); |
a7ad477f CR |
1108 | /* negative subscripts to indexed arrays count back from end */ |
1109 | if (ind < 0) | |
1110 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
fdf670ea CR |
1111 | if (ind < 0) |
1112 | { | |
1113 | builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg)); | |
1114 | return -1; | |
1115 | } | |
1116 | ae = array_remove (array_cell (var), ind); | |
1117 | if (ae) | |
1118 | array_dispose_element (ae); | |
1119 | } | |
06c3a575 CR |
1120 | else /* array_p (var) == 0 && assoc_p (var) == 0 */ |
1121 | { | |
1122 | akey = this_command_name; | |
4657c040 | 1123 | ind = array_expand_index (var, sub, strlen (sub) + 1, 0); |
06c3a575 CR |
1124 | this_command_name = akey; |
1125 | if (ind == 0) | |
1126 | { | |
1127 | unbind_variable (var->name); | |
1128 | return (0); | |
1129 | } | |
1130 | else | |
1131 | return -2; /* any subscript other than 0 is invalid with scalar variables */ | |
1132 | } | |
fdf670ea | 1133 | |
f73dda09 JA |
1134 | return 0; |
1135 | } | |
1136 | ||
1137 | /* Format and output an array assignment in compound form VAR=(VALUES), | |
1138 | suitable for re-use as input. */ | |
1139 | void | |
a61ffa78 | 1140 | print_array_assignment (SHELL_VAR *var, int quoted) |
f73dda09 JA |
1141 | { |
1142 | char *vstr; | |
1143 | ||
7117c2d2 | 1144 | vstr = array_to_assign (array_cell (var), quoted); |
f73dda09 JA |
1145 | |
1146 | if (vstr == 0) | |
1147 | printf ("%s=%s\n", var->name, quoted ? "'()'" : "()"); | |
1148 | else | |
1149 | { | |
1150 | printf ("%s=%s\n", var->name, vstr); | |
1151 | free (vstr); | |
1152 | } | |
1153 | } | |
1154 | ||
fdf670ea CR |
1155 | /* Format and output an associative array assignment in compound form |
1156 | VAR=(VALUES), suitable for re-use as input. */ | |
1157 | void | |
a61ffa78 | 1158 | print_assoc_assignment (SHELL_VAR *var, int quoted) |
fdf670ea CR |
1159 | { |
1160 | char *vstr; | |
1161 | ||
1162 | vstr = assoc_to_assign (assoc_cell (var), quoted); | |
1163 | ||
1164 | if (vstr == 0) | |
1165 | printf ("%s=%s\n", var->name, quoted ? "'()'" : "()"); | |
1166 | else | |
1167 | { | |
1168 | printf ("%s=%s\n", var->name, vstr); | |
1169 | free (vstr); | |
1170 | } | |
1171 | } | |
1172 | ||
f73dda09 JA |
1173 | /***********************************************************************/ |
1174 | /* */ | |
1175 | /* Utility functions to manage arrays and their contents for expansion */ | |
1176 | /* */ | |
1177 | /***********************************************************************/ | |
1178 | ||
1179 | /* Return 1 if NAME is a properly-formed array reference v[sub]. */ | |
5fab8dbf | 1180 | |
4657c040 CR |
1181 | /* When NAME is a properly-formed array reference and a non-null argument SUBP |
1182 | is supplied, '[' and ']' that enclose the subscript are replaced by '\0', | |
1183 | and the pointer to the subscript in NAME is assigned to *SUBP, so that NAME | |
1184 | and SUBP can be later used as the array name and the subscript, | |
1185 | respectively. When SUBP is the null pointer, the original string NAME will | |
1186 | not be modified. */ | |
5fab8dbf | 1187 | /* We need to reserve 1 for FLAGS, which we pass to skipsubscript. */ |
f73dda09 | 1188 | int |
b2613ad1 | 1189 | tokenize_array_reference (const char *name, int flags, char **subp) |
f73dda09 JA |
1190 | { |
1191 | char *t; | |
18612983 | 1192 | int r, len, isassoc, ssflags; |
5fab8dbf | 1193 | SHELL_VAR *entry; |
f73dda09 | 1194 | |
d0ca3503 | 1195 | t = mbschr (name, '['); /* ] */ |
c87bb0a8 | 1196 | isassoc = 0; |
f73dda09 JA |
1197 | if (t) |
1198 | { | |
1199 | *t = '\0'; | |
1200 | r = legal_identifier (name); | |
c87bb0a8 CR |
1201 | if (flags & VA_NOEXPAND) /* Don't waste a lookup if we don't need one */ |
1202 | isassoc = (entry = find_variable (name)) && assoc_p (entry); | |
f73dda09 JA |
1203 | *t = '['; |
1204 | if (r == 0) | |
1205 | return 0; | |
5fab8dbf | 1206 | |
18612983 | 1207 | ssflags = 0; |
5fab8dbf CR |
1208 | if (isassoc && ((flags & (VA_NOEXPAND|VA_ONEWORD)) == (VA_NOEXPAND|VA_ONEWORD))) |
1209 | len = strlen (t) - 1; | |
f19b1b73 | 1210 | else if (isassoc) |
18612983 CR |
1211 | { |
1212 | if (flags & VA_NOEXPAND) | |
1213 | ssflags |= 1; | |
1214 | len = skipsubscript (t, 0, ssflags); | |
1215 | } | |
5fab8dbf CR |
1216 | else |
1217 | /* Check for a properly-terminated non-null subscript. */ | |
f19b1b73 CR |
1218 | len = skipsubscript (t, 0, 0); /* arithmetic expression */ |
1219 | ||
5fab8dbf | 1220 | if (t[len] != ']' || len == 1 || t[len+1] != '\0') |
80c3b1d4 | 1221 | return 0; |
5fab8dbf | 1222 | |
3d31a311 | 1223 | #if 0 |
661f4c20 | 1224 | /* Could check and allow subscripts consisting only of whitespace for |
5fab8dbf | 1225 | existing associative arrays, using isassoc */ |
f73dda09 JA |
1226 | for (r = 1; r < len; r++) |
1227 | if (whitespace (t[r]) == 0) | |
4657c040 CR |
1228 | break; |
1229 | if (r == len) | |
1230 | return 0; /* Fail if the subscript contains only whitespaces. */ | |
1231 | #endif | |
1232 | ||
1233 | if (subp) | |
1234 | { | |
1235 | t[0] = t[len] = '\0'; | |
1236 | *subp = t + 1; | |
1237 | } | |
1238 | ||
661f4c20 CR |
1239 | /* This allows blank subscripts */ |
1240 | return 1; | |
f73dda09 JA |
1241 | } |
1242 | return 0; | |
1243 | } | |
1244 | ||
4657c040 CR |
1245 | /* Return 1 if NAME is a properly-formed array reference v[sub]. */ |
1246 | ||
1247 | /* We need to reserve 1 for FLAGS, which we pass to skipsubscript. */ | |
1248 | int | |
a61ffa78 | 1249 | valid_array_reference (const char *name, int flags) |
4657c040 | 1250 | { |
b2613ad1 | 1251 | return tokenize_array_reference (name, flags, (char **)NULL); |
4657c040 CR |
1252 | } |
1253 | ||
f73dda09 JA |
1254 | /* Expand the array index beginning at S and extending LEN characters. */ |
1255 | arrayind_t | |
b2613ad1 | 1256 | array_expand_index (SHELL_VAR *var, const char *s, int len, int flags) |
f73dda09 | 1257 | { |
06c3a575 | 1258 | char *exp, *t, *savecmd; |
35bc7025 | 1259 | int expok, eflag; |
f73dda09 JA |
1260 | arrayind_t val; |
1261 | ||
1262 | exp = (char *)xmalloc (len); | |
1263 | strncpy (exp, s, len - 1); | |
1264 | exp[len - 1] = '\0'; | |
d514a087 | 1265 | #if 0 /* TAG: maybe bash-5.2 */ |
ec157dfe CR |
1266 | if ((flags & AV_NOEXPAND) == 0) |
1267 | t = expand_arith_string (exp, Q_DOUBLE_QUOTES|Q_ARITH|Q_ARRAYSUB); /* XXX - Q_ARRAYSUB for future use */ | |
1268 | else | |
1269 | t = exp; | |
63706353 | 1270 | #else |
b4a00022 | 1271 | t = expand_arith_string (exp, Q_DOUBLE_QUOTES|Q_ARITH|Q_ARRAYSUB); /* XXX - Q_ARRAYSUB for future use */ |
63706353 | 1272 | #endif |
06c3a575 | 1273 | savecmd = this_command_name; |
f73dda09 | 1274 | this_command_name = (char *)NULL; |
35bc7025 | 1275 | eflag = (shell_compatibility_level > 51) ? 0 : EXP_EXPANDED; |
35bc7025 | 1276 | val = evalexp (t, eflag, &expok); /* XXX - was 0 but we expanded exp already */ |
06c3a575 | 1277 | this_command_name = savecmd; |
ec157dfe CR |
1278 | if (t != exp) |
1279 | free (t); | |
f73dda09 JA |
1280 | free (exp); |
1281 | if (expok == 0) | |
1282 | { | |
194cfc28 | 1283 | set_exit_status (EXECUTION_FAILURE); |
c184f645 | 1284 | |
3b1164fc CR |
1285 | if (no_longjmp_on_fatal_error) |
1286 | return 0; | |
c184f645 | 1287 | top_level_cleanup (); |
f73dda09 JA |
1288 | jump_to_top_level (DISCARD); |
1289 | } | |
1290 | return val; | |
1291 | } | |
1292 | ||
1293 | /* Return the name of the variable specified by S without any subscript. | |
1294 | If SUBP is non-null, return a pointer to the start of the subscript | |
1295 | in *SUBP. If LENP is non-null, the length of the subscript is returned | |
1296 | in *LENP. This returns newly-allocated memory. */ | |
1297 | char * | |
a61ffa78 | 1298 | array_variable_name (const char *s, int flags, char **subp, int *lenp) |
f73dda09 JA |
1299 | { |
1300 | char *t, *ret; | |
1d17c604 | 1301 | int ind, ni, ssflags; |
f73dda09 | 1302 | |
d0ca3503 | 1303 | t = mbschr (s, '['); |
f73dda09 | 1304 | if (t == 0) |
5e13499c CR |
1305 | { |
1306 | if (subp) | |
1307 | *subp = t; | |
1308 | if (lenp) | |
1309 | *lenp = 0; | |
1310 | return ((char *)NULL); | |
1311 | } | |
f73dda09 | 1312 | ind = t - s; |
1d17c604 CR |
1313 | if ((flags & (AV_NOEXPAND|AV_ONEWORD)) == (AV_NOEXPAND|AV_ONEWORD)) |
1314 | ni = strlen (s) - 1; | |
1315 | else | |
1316 | { | |
1317 | ssflags = 0; | |
1318 | if (flags & AV_NOEXPAND) | |
1319 | ssflags |= 1; | |
1320 | ni = skipsubscript (s, ind, ssflags); | |
1321 | } | |
f73dda09 JA |
1322 | if (ni <= ind + 1 || s[ni] != ']') |
1323 | { | |
7117c2d2 | 1324 | err_badarraysub (s); |
5e13499c CR |
1325 | if (subp) |
1326 | *subp = t; | |
1327 | if (lenp) | |
1328 | *lenp = 0; | |
f73dda09 JA |
1329 | return ((char *)NULL); |
1330 | } | |
1331 | ||
1332 | *t = '\0'; | |
1333 | ret = savestring (s); | |
1334 | *t++ = '['; /* ] */ | |
1335 | ||
1336 | if (subp) | |
1337 | *subp = t; | |
1338 | if (lenp) | |
1339 | *lenp = ni - ind; | |
1340 | ||
1341 | return ret; | |
1342 | } | |
1343 | ||
1344 | /* Return the variable specified by S without any subscript. If SUBP is | |
1345 | non-null, return a pointer to the start of the subscript in *SUBP. | |
1346 | If LENP is non-null, the length of the subscript is returned in *LENP. */ | |
1347 | SHELL_VAR * | |
a61ffa78 | 1348 | array_variable_part (const char *s, int flags, char **subp, int *lenp) |
f73dda09 JA |
1349 | { |
1350 | char *t; | |
1351 | SHELL_VAR *var; | |
1352 | ||
64a7a624 | 1353 | t = array_variable_name (s, flags, subp, lenp); |
f73dda09 JA |
1354 | if (t == 0) |
1355 | return ((SHELL_VAR *)NULL); | |
bddda3d2 | 1356 | var = find_variable (t); /* XXX - handle namerefs here? */ |
f73dda09 JA |
1357 | |
1358 | free (t); | |
a37d979e | 1359 | return var; /* now return invisible variables; caller must handle */ |
f73dda09 JA |
1360 | } |
1361 | ||
67362c60 CR |
1362 | #define INDEX_ERROR() \ |
1363 | do \ | |
1364 | { \ | |
1365 | if (var) \ | |
1366 | err_badarraysub (var->name); \ | |
1367 | else \ | |
1368 | { \ | |
1369 | t[-1] = '\0'; \ | |
1370 | err_badarraysub (s); \ | |
1371 | t[-1] = '['; /* ] */\ | |
1372 | } \ | |
1373 | return ((char *)NULL); \ | |
1374 | } \ | |
1375 | while (0) | |
1376 | ||
f73dda09 JA |
1377 | /* Return a string containing the elements in the array and subscript |
1378 | described by S. If the subscript is * or @, obeys quoting rules akin | |
7117c2d2 | 1379 | to the expansion of $* and $@ including double quoting. If RTYPE |
b1a26c01 CR |
1380 | is non-null it gets 1 if the array reference is name[*], 2 if the |
1381 | reference is name[@], and 0 otherwise. */ | |
f73dda09 | 1382 | static char * |
a61ffa78 | 1383 | array_value_internal (const char *s, int quoted, int flags, array_eltstate_t *estatep) |
f73dda09 | 1384 | { |
b2b78a63 | 1385 | int len, isassoc, subtype; |
f73dda09 | 1386 | arrayind_t ind; |
fdf670ea | 1387 | char *akey; |
f73dda09 JA |
1388 | char *retval, *t, *temp; |
1389 | WORD_LIST *l; | |
1390 | SHELL_VAR *var; | |
1391 | ||
1d17c604 | 1392 | var = array_variable_part (s, flags, &t, &len); /* XXX */ |
f73dda09 | 1393 | |
7117c2d2 JA |
1394 | /* Expand the index, even if the variable doesn't exist, in case side |
1395 | effects are needed, like ${w[i++]} where w is unset. */ | |
1396 | #if 0 | |
f73dda09 JA |
1397 | if (var == 0) |
1398 | return (char *)NULL; | |
7117c2d2 | 1399 | #endif |
f73dda09 | 1400 | |
d3a24ed2 CR |
1401 | if (len == 0) |
1402 | return ((char *)NULL); /* error message already printed */ | |
1403 | ||
a30f513f | 1404 | isassoc = var && assoc_p (var); |
f73dda09 | 1405 | /* [ */ |
631b20c6 | 1406 | akey = 0; |
b2b78a63 CR |
1407 | subtype = 0; |
1408 | if (estatep) | |
1409 | estatep->value = (char *)NULL; | |
1410 | ||
a30f513f CR |
1411 | /* Backwards compatibility: we only change the behavior of A[@] and A[*] |
1412 | for associative arrays, and the caller has to request it. */ | |
1413 | if ((isassoc == 0 || (flags & AV_ATSTARKEYS) == 0) && ALL_ELEMENT_SUB (t[0]) && t[1] == ']') | |
f73dda09 | 1414 | { |
b2b78a63 CR |
1415 | if (estatep) |
1416 | estatep->subtype = (t[0] == '*') ? 1 : 2; | |
5f8cde23 | 1417 | if ((flags & AV_ALLOWALL) == 0) |
f73dda09 | 1418 | { |
7117c2d2 | 1419 | err_badarraysub (s); |
f73dda09 JA |
1420 | return ((char *)NULL); |
1421 | } | |
b2b78a63 | 1422 | else if (var == 0 || value_cell (var) == 0) |
7117c2d2 | 1423 | return ((char *)NULL); |
a6ae8f35 CR |
1424 | else if (invisible_p (var)) |
1425 | return ((char *)NULL); | |
fdf670ea | 1426 | else if (array_p (var) == 0 && assoc_p (var) == 0) |
b2b78a63 CR |
1427 | { |
1428 | if (estatep) | |
1429 | estatep->type = ARRAY_SCALAR; | |
1430 | l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL); | |
1431 | } | |
fdf670ea CR |
1432 | else if (assoc_p (var)) |
1433 | { | |
b2b78a63 CR |
1434 | if (estatep) |
1435 | estatep->type = ARRAY_ASSOC; | |
fdf670ea CR |
1436 | l = assoc_to_word_list (assoc_cell (var)); |
1437 | if (l == (WORD_LIST *)NULL) | |
1438 | return ((char *)NULL); | |
1439 | } | |
f73dda09 JA |
1440 | else |
1441 | { | |
b2b78a63 | 1442 | if (estatep) |
8f68f9f0 | 1443 | estatep->type = ARRAY_INDEXED; |
f73dda09 JA |
1444 | l = array_to_word_list (array_cell (var)); |
1445 | if (l == (WORD_LIST *)NULL) | |
1446 | return ((char *) NULL); | |
1447 | } | |
1448 | ||
b2b78a63 CR |
1449 | /* Caller of array_value takes care of inspecting estatep->subtype and |
1450 | duplicating retval if subtype == 0, so this is not a memory leak */ | |
f73dda09 JA |
1451 | if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
1452 | { | |
32dc2bf5 | 1453 | temp = string_list_dollar_star (l, quoted, (flags & AV_ASSIGNRHS) ? PF_ASSIGNRHS : 0); |
553a7d66 | 1454 | retval = quote_string (temp); |
f73dda09 JA |
1455 | free (temp); |
1456 | } | |
1457 | else /* ${name[@]} or unquoted ${name[*]} */ | |
553a7d66 | 1458 | retval = string_list_dollar_at (l, quoted, (flags & AV_ASSIGNRHS) ? PF_ASSIGNRHS : 0); |
f73dda09 JA |
1459 | |
1460 | dispose_words (l); | |
1461 | } | |
1462 | else | |
1463 | { | |
b2b78a63 CR |
1464 | if (estatep) |
1465 | estatep->subtype = 0; | |
fdf670ea | 1466 | if (var == 0 || array_p (var) || assoc_p (var) == 0) |
f73dda09 | 1467 | { |
b2b78a63 | 1468 | if ((flags & AV_USEIND) == 0 || estatep == 0) |
7117c2d2 | 1469 | { |
ec157dfe | 1470 | ind = array_expand_index (var, t, len, flags); |
67362c60 | 1471 | if (ind < 0) |
5f8cde23 CR |
1472 | { |
1473 | /* negative subscripts to indexed arrays count back from end */ | |
1474 | if (var && array_p (var)) | |
1475 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
1476 | if (ind < 0) | |
1477 | INDEX_ERROR(); | |
1478 | } | |
b2b78a63 CR |
1479 | if (estatep) |
1480 | estatep->ind = ind; | |
7117c2d2 | 1481 | } |
b2b78a63 CR |
1482 | else if (estatep && (flags & AV_USEIND)) |
1483 | ind = estatep->ind; | |
1484 | if (estatep && var) | |
1485 | estatep->type = array_p (var) ? ARRAY_INDEXED : ARRAY_SCALAR; | |
f73dda09 | 1486 | } |
fdf670ea CR |
1487 | else if (assoc_p (var)) |
1488 | { | |
1489 | t[len - 1] = '\0'; | |
b2b78a63 CR |
1490 | if (estatep) |
1491 | estatep->type = ARRAY_ASSOC; | |
1492 | if ((flags & AV_USEIND) && estatep && estatep->key) | |
1493 | akey = savestring (estatep->key); | |
1494 | else if ((flags & AV_NOEXPAND) == 0) | |
35bc7025 | 1495 | akey = expand_subscript_string (t, 0); /* [ */ |
a57ed9e9 CR |
1496 | else |
1497 | akey = savestring (t); | |
fdf670ea CR |
1498 | t[len - 1] = ']'; |
1499 | if (akey == 0 || *akey == 0) | |
631b20c6 CR |
1500 | { |
1501 | FREE (akey); | |
1502 | INDEX_ERROR(); | |
1503 | } | |
fdf670ea | 1504 | } |
b2b78a63 CR |
1505 | |
1506 | if (var == 0 || value_cell (var) == 0) | |
631b20c6 | 1507 | { |
b2b78a63 | 1508 | FREE (akey); |
631b20c6 CR |
1509 | return ((char *)NULL); |
1510 | } | |
a6ae8f35 CR |
1511 | else if (invisible_p (var)) |
1512 | { | |
b2b78a63 | 1513 | FREE (akey); |
a6ae8f35 CR |
1514 | return ((char *)NULL); |
1515 | } | |
fdf670ea | 1516 | if (array_p (var) == 0 && assoc_p (var) == 0) |
b2b78a63 | 1517 | retval = (ind == 0) ? value_cell (var) : (char *)NULL; |
fdf670ea | 1518 | else if (assoc_p (var)) |
68dfe178 CR |
1519 | { |
1520 | retval = assoc_reference (assoc_cell (var), akey); | |
b2b78a63 CR |
1521 | if (estatep && estatep->key && (flags & AV_USEIND)) |
1522 | free (akey); /* duplicated estatep->key */ | |
1523 | else if (estatep) | |
1524 | estatep->key = akey; /* XXX - caller must manage */ | |
1525 | else /* not saving it anywhere */ | |
1526 | free (akey); | |
68dfe178 | 1527 | } |
fdf670ea CR |
1528 | else |
1529 | retval = array_reference (array_cell (var), ind); | |
b2b78a63 CR |
1530 | |
1531 | if (estatep) | |
1532 | estatep->value = retval; | |
f73dda09 JA |
1533 | } |
1534 | ||
1535 | return retval; | |
1536 | } | |
1537 | ||
1538 | /* Return a string containing the elements described by the array and | |
1539 | subscript contained in S, obeying quoting for subscripts * and @. */ | |
1540 | char * | |
a61ffa78 | 1541 | array_value (const char *s, int quoted, int flags, array_eltstate_t *estatep) |
f73dda09 | 1542 | { |
b2b78a63 CR |
1543 | char *retval; |
1544 | ||
1545 | retval = array_value_internal (s, quoted, flags|AV_ALLOWALL, estatep); | |
1546 | return retval; | |
f73dda09 JA |
1547 | } |
1548 | ||
1549 | /* Return the value of the array indexing expression S as a single string. | |
5f8cde23 CR |
1550 | If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This |
1551 | is used by other parts of the shell such as the arithmetic expression | |
1552 | evaluator in expr.c. */ | |
f73dda09 | 1553 | char * |
a61ffa78 | 1554 | get_array_value (const char *s, int flags, array_eltstate_t *estatep) |
f73dda09 | 1555 | { |
b2b78a63 CR |
1556 | char *retval; |
1557 | ||
1558 | retval = array_value_internal (s, 0, flags, estatep); | |
1559 | return retval; | |
f73dda09 JA |
1560 | } |
1561 | ||
d3a24ed2 | 1562 | char * |
b2613ad1 | 1563 | array_keys (const char *s, int quoted, int pflags) |
d3a24ed2 CR |
1564 | { |
1565 | int len; | |
1566 | char *retval, *t, *temp; | |
1567 | WORD_LIST *l; | |
1568 | SHELL_VAR *var; | |
1569 | ||
64a7a624 | 1570 | var = array_variable_part (s, 0, &t, &len); |
d3a24ed2 CR |
1571 | |
1572 | /* [ */ | |
1573 | if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']') | |
1574 | return (char *)NULL; | |
1575 | ||
68dfe178 CR |
1576 | if (var_isset (var) == 0 || invisible_p (var)) |
1577 | return (char *)NULL; | |
1578 | ||
fdf670ea | 1579 | if (array_p (var) == 0 && assoc_p (var) == 0) |
d3a24ed2 | 1580 | l = add_string_to_list ("0", (WORD_LIST *)NULL); |
fdf670ea CR |
1581 | else if (assoc_p (var)) |
1582 | l = assoc_keys_to_word_list (assoc_cell (var)); | |
d3a24ed2 | 1583 | else |
fdf670ea CR |
1584 | l = array_keys_to_word_list (array_cell (var)); |
1585 | if (l == (WORD_LIST *)NULL) | |
1586 | return ((char *) NULL); | |
d3a24ed2 | 1587 | |
15a23d44 | 1588 | retval = string_list_pos_params (t[0], l, quoted, pflags); |
d3a24ed2 CR |
1589 | |
1590 | dispose_words (l); | |
1591 | return retval; | |
1592 | } | |
f73dda09 | 1593 | #endif /* ARRAY_VARS */ |