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Commit | Line | Data |
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ccc6cda3 JA |
1 | /* make_cmd.c -- Functions for making instances of the various |
2 | parser constructs. */ | |
726f6388 | 3 | |
d233b485 | 4 | /* Copyright (C) 1989-2018 Free Software Foundation, Inc. |
726f6388 | 5 | |
3185942a | 6 | This file is part of GNU Bash, the Bourne Again SHell. |
726f6388 | 7 | |
3185942a JA |
8 | Bash is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
11 | (at your option) any later version. | |
726f6388 | 12 | |
3185942a JA |
13 | Bash is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
726f6388 | 17 | |
3185942a JA |
18 | You should have received a copy of the GNU General Public License |
19 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
726f6388 | 21 | |
ccc6cda3 JA |
22 | #include "config.h" |
23 | ||
726f6388 JA |
24 | #include <stdio.h> |
25 | #include "bashtypes.h" | |
b80f6443 | 26 | #if !defined (_MINIX) && defined (HAVE_SYS_FILE_H) |
cce855bc JA |
27 | # include <sys/file.h> |
28 | #endif | |
726f6388 JA |
29 | #include "filecntl.h" |
30 | #include "bashansi.h" | |
ccc6cda3 JA |
31 | #if defined (HAVE_UNISTD_H) |
32 | # include <unistd.h> | |
33 | #endif | |
34 | ||
b80f6443 JA |
35 | #include "bashintl.h" |
36 | ||
d233b485 CR |
37 | #include "shell.h" |
38 | #include "execute_cmd.h" | |
0001803f | 39 | #include "parser.h" |
726f6388 | 40 | #include "flags.h" |
726f6388 | 41 | #include "input.h" |
726f6388 JA |
42 | |
43 | #if defined (JOB_CONTROL) | |
44 | #include "jobs.h" | |
45 | #endif | |
46 | ||
7117c2d2 JA |
47 | #include "shmbutil.h" |
48 | ||
a0c0a00f | 49 | int here_doc_first_line = 0; |
bb70624e | 50 | |
7117c2d2 JA |
51 | /* Object caching */ |
52 | sh_obj_cache_t wdcache = {0, 0, 0}; | |
53 | sh_obj_cache_t wlcache = {0, 0, 0}; | |
54 | ||
a0c0a00f CR |
55 | #define WDCACHESIZE 128 |
56 | #define WLCACHESIZE 128 | |
7117c2d2 | 57 | |
b80f6443 | 58 | static COMMAND *make_for_or_select __P((enum command_type, WORD_DESC *, WORD_LIST *, COMMAND *, int)); |
f73dda09 JA |
59 | #if defined (ARITH_FOR_COMMAND) |
60 | static WORD_LIST *make_arith_for_expr __P((char *)); | |
61 | #endif | |
62 | static COMMAND *make_until_or_while __P((enum command_type, COMMAND *, COMMAND *)); | |
726f6388 | 63 | |
7117c2d2 JA |
64 | void |
65 | cmd_init () | |
66 | { | |
67 | ocache_create (wdcache, WORD_DESC, WDCACHESIZE); | |
68 | ocache_create (wlcache, WORD_LIST, WLCACHESIZE); | |
69 | } | |
70 | ||
95732b49 JA |
71 | WORD_DESC * |
72 | alloc_word_desc () | |
73 | { | |
74 | WORD_DESC *temp; | |
75 | ||
76 | ocache_alloc (wdcache, WORD_DESC, temp); | |
77 | temp->flags = 0; | |
78 | temp->word = 0; | |
79 | return temp; | |
80 | } | |
81 | ||
726f6388 | 82 | WORD_DESC * |
ccc6cda3 | 83 | make_bare_word (string) |
f73dda09 | 84 | const char *string; |
726f6388 JA |
85 | { |
86 | WORD_DESC *temp; | |
95732b49 JA |
87 | |
88 | temp = alloc_word_desc (); | |
7117c2d2 | 89 | |
ccc6cda3 JA |
90 | if (*string) |
91 | temp->word = savestring (string); | |
92 | else | |
726f6388 | 93 | { |
f73dda09 | 94 | temp->word = (char *)xmalloc (1); |
ccc6cda3 | 95 | temp->word[0] = '\0'; |
726f6388 | 96 | } |
ccc6cda3 | 97 | |
726f6388 JA |
98 | return (temp); |
99 | } | |
100 | ||
ccc6cda3 JA |
101 | WORD_DESC * |
102 | make_word_flags (w, string) | |
103 | WORD_DESC *w; | |
f73dda09 | 104 | const char *string; |
ccc6cda3 | 105 | { |
7117c2d2 JA |
106 | register int i; |
107 | size_t slen; | |
108 | DECLARE_MBSTATE; | |
ccc6cda3 | 109 | |
7117c2d2 JA |
110 | i = 0; |
111 | slen = strlen (string); | |
112 | while (i < slen) | |
113 | { | |
114 | switch (string[i]) | |
115 | { | |
ccc6cda3 JA |
116 | case '$': |
117 | w->flags |= W_HASDOLLAR; | |
118 | break; | |
119 | case '\\': | |
120 | break; /* continue the loop */ | |
121 | case '\'': | |
122 | case '`': | |
123 | case '"': | |
124 | w->flags |= W_QUOTED; | |
125 | break; | |
7117c2d2 JA |
126 | } |
127 | ||
128 | ADVANCE_CHAR (string, slen, i); | |
129 | } | |
130 | ||
ccc6cda3 JA |
131 | return (w); |
132 | } | |
133 | ||
134 | WORD_DESC * | |
135 | make_word (string) | |
f73dda09 | 136 | const char *string; |
ccc6cda3 JA |
137 | { |
138 | WORD_DESC *temp; | |
139 | ||
140 | temp = make_bare_word (string); | |
141 | return (make_word_flags (temp, string)); | |
142 | } | |
143 | ||
726f6388 JA |
144 | WORD_DESC * |
145 | make_word_from_token (token) | |
146 | int token; | |
147 | { | |
148 | char tokenizer[2]; | |
149 | ||
150 | tokenizer[0] = token; | |
151 | tokenizer[1] = '\0'; | |
152 | ||
153 | return (make_word (tokenizer)); | |
154 | } | |
155 | ||
156 | WORD_LIST * | |
f73dda09 | 157 | make_word_list (word, wlink) |
726f6388 | 158 | WORD_DESC *word; |
f73dda09 | 159 | WORD_LIST *wlink; |
726f6388 JA |
160 | { |
161 | WORD_LIST *temp; | |
162 | ||
7117c2d2 | 163 | ocache_alloc (wlcache, WORD_LIST, temp); |
95732b49 | 164 | |
726f6388 | 165 | temp->word = word; |
f73dda09 | 166 | temp->next = wlink; |
726f6388 JA |
167 | return (temp); |
168 | } | |
169 | ||
726f6388 JA |
170 | COMMAND * |
171 | make_command (type, pointer) | |
172 | enum command_type type; | |
173 | SIMPLE_COM *pointer; | |
174 | { | |
175 | COMMAND *temp; | |
176 | ||
177 | temp = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
178 | temp->type = type; | |
179 | temp->value.Simple = pointer; | |
ccc6cda3 | 180 | temp->value.Simple->flags = temp->flags = 0; |
726f6388 JA |
181 | temp->redirects = (REDIRECT *)NULL; |
182 | return (temp); | |
183 | } | |
184 | ||
185 | COMMAND * | |
186 | command_connect (com1, com2, connector) | |
187 | COMMAND *com1, *com2; | |
188 | int connector; | |
189 | { | |
190 | CONNECTION *temp; | |
191 | ||
192 | temp = (CONNECTION *)xmalloc (sizeof (CONNECTION)); | |
193 | temp->connector = connector; | |
194 | temp->first = com1; | |
195 | temp->second = com2; | |
196 | return (make_command (cm_connection, (SIMPLE_COM *)temp)); | |
197 | } | |
198 | ||
ccc6cda3 | 199 | static COMMAND * |
b80f6443 | 200 | make_for_or_select (type, name, map_list, action, lineno) |
ccc6cda3 | 201 | enum command_type type; |
726f6388 JA |
202 | WORD_DESC *name; |
203 | WORD_LIST *map_list; | |
204 | COMMAND *action; | |
b80f6443 | 205 | int lineno; |
726f6388 | 206 | { |
ccc6cda3 | 207 | FOR_COM *temp; |
726f6388 | 208 | |
ccc6cda3 | 209 | temp = (FOR_COM *)xmalloc (sizeof (FOR_COM)); |
726f6388 JA |
210 | temp->flags = 0; |
211 | temp->name = name; | |
b80f6443 | 212 | temp->line = lineno; |
726f6388 JA |
213 | temp->map_list = map_list; |
214 | temp->action = action; | |
ccc6cda3 | 215 | return (make_command (type, (SIMPLE_COM *)temp)); |
726f6388 JA |
216 | } |
217 | ||
726f6388 | 218 | COMMAND * |
b80f6443 | 219 | make_for_command (name, map_list, action, lineno) |
726f6388 JA |
220 | WORD_DESC *name; |
221 | WORD_LIST *map_list; | |
222 | COMMAND *action; | |
b80f6443 | 223 | int lineno; |
726f6388 | 224 | { |
b80f6443 | 225 | return (make_for_or_select (cm_for, name, map_list, action, lineno)); |
726f6388 | 226 | } |
ccc6cda3 JA |
227 | |
228 | COMMAND * | |
b80f6443 | 229 | make_select_command (name, map_list, action, lineno) |
ccc6cda3 JA |
230 | WORD_DESC *name; |
231 | WORD_LIST *map_list; | |
232 | COMMAND *action; | |
b80f6443 | 233 | int lineno; |
ccc6cda3 JA |
234 | { |
235 | #if defined (SELECT_COMMAND) | |
b80f6443 | 236 | return (make_for_or_select (cm_select, name, map_list, action, lineno)); |
bb70624e JA |
237 | #else |
238 | last_command_exit_value = 2; | |
239 | return ((COMMAND *)NULL); | |
726f6388 | 240 | #endif |
ccc6cda3 | 241 | } |
726f6388 | 242 | |
bb70624e JA |
243 | #if defined (ARITH_FOR_COMMAND) |
244 | static WORD_LIST * | |
245 | make_arith_for_expr (s) | |
246 | char *s; | |
247 | { | |
248 | WORD_LIST *result; | |
b80f6443 | 249 | WORD_DESC *wd; |
bb70624e JA |
250 | |
251 | if (s == 0 || *s == '\0') | |
252 | return ((WORD_LIST *)NULL); | |
b80f6443 | 253 | wd = make_word (s); |
95732b49 | 254 | wd->flags |= W_NOGLOB|W_NOSPLIT|W_QUOTED|W_DQUOTE; /* no word splitting or globbing */ |
a0c0a00f CR |
255 | #if defined (PROCESS_SUBSTITUTION) |
256 | wd->flags |= W_NOPROCSUB; /* no process substitution */ | |
257 | #endif | |
b80f6443 | 258 | result = make_word_list (wd, (WORD_LIST *)NULL); |
bb70624e JA |
259 | return result; |
260 | } | |
261 | #endif | |
262 | ||
b80f6443 JA |
263 | /* Note that this function calls dispose_words on EXPRS, since it doesn't |
264 | use the word list directly. We free it here rather than at the caller | |
265 | because no other function in this file requires that the caller free | |
266 | any arguments. */ | |
bb70624e JA |
267 | COMMAND * |
268 | make_arith_for_command (exprs, action, lineno) | |
269 | WORD_LIST *exprs; | |
270 | COMMAND *action; | |
271 | int lineno; | |
272 | { | |
273 | #if defined (ARITH_FOR_COMMAND) | |
274 | ARITH_FOR_COM *temp; | |
275 | WORD_LIST *init, *test, *step; | |
276 | char *s, *t, *start; | |
ac50fbac | 277 | int nsemi, i; |
bb70624e JA |
278 | |
279 | init = test = step = (WORD_LIST *)NULL; | |
280 | /* Parse the string into the three component sub-expressions. */ | |
281 | start = t = s = exprs->word->word; | |
282 | for (nsemi = 0; ;) | |
283 | { | |
284 | /* skip whitespace at the start of each sub-expression. */ | |
285 | while (whitespace (*s)) | |
286 | s++; | |
287 | start = s; | |
288 | /* skip to the semicolon or EOS */ | |
a0c0a00f | 289 | i = skip_to_delim (start, 0, ";", SD_NOJMP|SD_NOPROCSUB); |
ac50fbac | 290 | s = start + i; |
bb70624e | 291 | |
ac50fbac | 292 | t = (i > 0) ? substring (start, 0, i) : (char *)NULL; |
bb70624e JA |
293 | |
294 | nsemi++; | |
295 | switch (nsemi) | |
296 | { | |
297 | case 1: | |
298 | init = make_arith_for_expr (t); | |
299 | break; | |
300 | case 2: | |
301 | test = make_arith_for_expr (t); | |
302 | break; | |
303 | case 3: | |
304 | step = make_arith_for_expr (t); | |
305 | break; | |
306 | } | |
307 | ||
308 | FREE (t); | |
309 | if (*s == '\0') | |
28ef6c31 | 310 | break; |
bb70624e JA |
311 | s++; /* skip over semicolon */ |
312 | } | |
313 | ||
314 | if (nsemi != 3) | |
315 | { | |
316 | if (nsemi < 3) | |
b80f6443 | 317 | parser_error (lineno, _("syntax error: arithmetic expression required")); |
bb70624e | 318 | else |
b80f6443 JA |
319 | parser_error (lineno, _("syntax error: `;' unexpected")); |
320 | parser_error (lineno, _("syntax error: `((%s))'"), exprs->word->word); | |
ac50fbac CR |
321 | free (init); |
322 | free (test); | |
323 | free (step); | |
bb70624e JA |
324 | last_command_exit_value = 2; |
325 | return ((COMMAND *)NULL); | |
326 | } | |
327 | ||
328 | temp = (ARITH_FOR_COM *)xmalloc (sizeof (ARITH_FOR_COM)); | |
329 | temp->flags = 0; | |
330 | temp->line = lineno; | |
331 | temp->init = init ? init : make_arith_for_expr ("1"); | |
332 | temp->test = test ? test : make_arith_for_expr ("1"); | |
333 | temp->step = step ? step : make_arith_for_expr ("1"); | |
334 | temp->action = action; | |
335 | ||
b80f6443 | 336 | dispose_words (exprs); |
bb70624e JA |
337 | return (make_command (cm_arith_for, (SIMPLE_COM *)temp)); |
338 | #else | |
b80f6443 | 339 | dispose_words (exprs); |
bb70624e JA |
340 | last_command_exit_value = 2; |
341 | return ((COMMAND *)NULL); | |
342 | #endif /* ARITH_FOR_COMMAND */ | |
343 | } | |
344 | ||
726f6388 JA |
345 | COMMAND * |
346 | make_group_command (command) | |
347 | COMMAND *command; | |
348 | { | |
ccc6cda3 | 349 | GROUP_COM *temp; |
726f6388 | 350 | |
ccc6cda3 | 351 | temp = (GROUP_COM *)xmalloc (sizeof (GROUP_COM)); |
726f6388 JA |
352 | temp->command = command; |
353 | return (make_command (cm_group, (SIMPLE_COM *)temp)); | |
354 | } | |
355 | ||
356 | COMMAND * | |
b80f6443 | 357 | make_case_command (word, clauses, lineno) |
726f6388 JA |
358 | WORD_DESC *word; |
359 | PATTERN_LIST *clauses; | |
95732b49 | 360 | int lineno; |
726f6388 JA |
361 | { |
362 | CASE_COM *temp; | |
363 | ||
364 | temp = (CASE_COM *)xmalloc (sizeof (CASE_COM)); | |
365 | temp->flags = 0; | |
b80f6443 | 366 | temp->line = lineno; |
726f6388 JA |
367 | temp->word = word; |
368 | temp->clauses = REVERSE_LIST (clauses, PATTERN_LIST *); | |
369 | return (make_command (cm_case, (SIMPLE_COM *)temp)); | |
370 | } | |
371 | ||
372 | PATTERN_LIST * | |
373 | make_pattern_list (patterns, action) | |
374 | WORD_LIST *patterns; | |
375 | COMMAND *action; | |
376 | { | |
377 | PATTERN_LIST *temp; | |
378 | ||
379 | temp = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST)); | |
380 | temp->patterns = REVERSE_LIST (patterns, WORD_LIST *); | |
381 | temp->action = action; | |
382 | temp->next = NULL; | |
95732b49 | 383 | temp->flags = 0; |
726f6388 JA |
384 | return (temp); |
385 | } | |
386 | ||
387 | COMMAND * | |
388 | make_if_command (test, true_case, false_case) | |
389 | COMMAND *test, *true_case, *false_case; | |
390 | { | |
391 | IF_COM *temp; | |
392 | ||
393 | temp = (IF_COM *)xmalloc (sizeof (IF_COM)); | |
394 | temp->flags = 0; | |
395 | temp->test = test; | |
396 | temp->true_case = true_case; | |
397 | temp->false_case = false_case; | |
398 | return (make_command (cm_if, (SIMPLE_COM *)temp)); | |
399 | } | |
400 | ||
401 | static COMMAND * | |
ccc6cda3 | 402 | make_until_or_while (which, test, action) |
726f6388 | 403 | enum command_type which; |
ccc6cda3 | 404 | COMMAND *test, *action; |
726f6388 JA |
405 | { |
406 | WHILE_COM *temp; | |
407 | ||
408 | temp = (WHILE_COM *)xmalloc (sizeof (WHILE_COM)); | |
409 | temp->flags = 0; | |
410 | temp->test = test; | |
411 | temp->action = action; | |
412 | return (make_command (which, (SIMPLE_COM *)temp)); | |
413 | } | |
414 | ||
415 | COMMAND * | |
416 | make_while_command (test, action) | |
417 | COMMAND *test, *action; | |
418 | { | |
ccc6cda3 | 419 | return (make_until_or_while (cm_while, test, action)); |
726f6388 JA |
420 | } |
421 | ||
422 | COMMAND * | |
423 | make_until_command (test, action) | |
424 | COMMAND *test, *action; | |
425 | { | |
ccc6cda3 | 426 | return (make_until_or_while (cm_until, test, action)); |
726f6388 JA |
427 | } |
428 | ||
cce855bc JA |
429 | COMMAND * |
430 | make_arith_command (exp) | |
431 | WORD_LIST *exp; | |
432 | { | |
433 | #if defined (DPAREN_ARITHMETIC) | |
434 | COMMAND *command; | |
435 | ARITH_COM *temp; | |
436 | ||
437 | command = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
438 | command->value.Arith = temp = (ARITH_COM *)xmalloc (sizeof (ARITH_COM)); | |
439 | ||
440 | temp->flags = 0; | |
441 | temp->line = line_number; | |
442 | temp->exp = exp; | |
443 | ||
444 | command->type = cm_arith; | |
445 | command->redirects = (REDIRECT *)NULL; | |
446 | command->flags = 0; | |
447 | ||
448 | return (command); | |
449 | #else | |
bb70624e | 450 | last_command_exit_value = 2; |
cce855bc JA |
451 | return ((COMMAND *)NULL); |
452 | #endif | |
453 | } | |
454 | ||
455 | #if defined (COND_COMMAND) | |
456 | struct cond_com * | |
457 | make_cond_node (type, op, left, right) | |
458 | int type; | |
459 | WORD_DESC *op; | |
460 | struct cond_com *left, *right; | |
461 | { | |
462 | COND_COM *temp; | |
463 | ||
464 | temp = (COND_COM *)xmalloc (sizeof (COND_COM)); | |
465 | temp->flags = 0; | |
466 | temp->line = line_number; | |
467 | temp->type = type; | |
468 | temp->op = op; | |
469 | temp->left = left; | |
470 | temp->right = right; | |
471 | ||
472 | return (temp); | |
473 | } | |
474 | #endif | |
475 | ||
476 | COMMAND * | |
477 | make_cond_command (cond_node) | |
478 | COND_COM *cond_node; | |
479 | { | |
480 | #if defined (COND_COMMAND) | |
481 | COMMAND *command; | |
482 | ||
483 | command = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
484 | command->value.Cond = cond_node; | |
485 | ||
486 | command->type = cm_cond; | |
487 | command->redirects = (REDIRECT *)NULL; | |
488 | command->flags = 0; | |
b72432fd | 489 | command->line = cond_node ? cond_node->line : 0; |
cce855bc JA |
490 | |
491 | return (command); | |
492 | #else | |
bb70624e | 493 | last_command_exit_value = 2; |
cce855bc JA |
494 | return ((COMMAND *)NULL); |
495 | #endif | |
496 | } | |
497 | ||
726f6388 JA |
498 | COMMAND * |
499 | make_bare_simple_command () | |
500 | { | |
501 | COMMAND *command; | |
ccc6cda3 JA |
502 | SIMPLE_COM *temp; |
503 | ||
504 | command = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
505 | command->value.Simple = temp = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM)); | |
726f6388 JA |
506 | |
507 | temp->flags = 0; | |
508 | temp->line = line_number; | |
509 | temp->words = (WORD_LIST *)NULL; | |
510 | temp->redirects = (REDIRECT *)NULL; | |
ccc6cda3 | 511 | |
726f6388 JA |
512 | command->type = cm_simple; |
513 | command->redirects = (REDIRECT *)NULL; | |
514 | command->flags = 0; | |
ccc6cda3 | 515 | |
726f6388 JA |
516 | return (command); |
517 | } | |
518 | ||
519 | /* Return a command which is the connection of the word or redirection | |
520 | in ELEMENT, and the command * or NULL in COMMAND. */ | |
521 | COMMAND * | |
522 | make_simple_command (element, command) | |
523 | ELEMENT element; | |
524 | COMMAND *command; | |
525 | { | |
526 | /* If we are starting from scratch, then make the initial command | |
527 | structure. Also note that we have to fill in all the slots, since | |
528 | malloc doesn't return zeroed space. */ | |
0001803f CR |
529 | if (command == 0) |
530 | { | |
531 | command = make_bare_simple_command (); | |
532 | parser_state |= PST_REDIRLIST; | |
533 | } | |
ccc6cda3 | 534 | |
726f6388 | 535 | if (element.word) |
0001803f CR |
536 | { |
537 | command->value.Simple->words = make_word_list (element.word, command->value.Simple->words); | |
538 | parser_state &= ~PST_REDIRLIST; | |
539 | } | |
b80f6443 | 540 | else if (element.redirect) |
726f6388 JA |
541 | { |
542 | REDIRECT *r = element.redirect; | |
543 | /* Due to the way <> is implemented, there may be more than a single | |
544 | redirection in element.redirect. We just follow the chain as far | |
545 | as it goes, and hook onto the end. */ | |
546 | while (r->next) | |
547 | r = r->next; | |
548 | r->next = command->value.Simple->redirects; | |
549 | command->value.Simple->redirects = element.redirect; | |
550 | } | |
0001803f | 551 | |
726f6388 JA |
552 | return (command); |
553 | } | |
554 | ||
ccc6cda3 JA |
555 | /* Because we are Bourne compatible, we read the input for this |
556 | << or <<- redirection now, from wherever input is coming from. | |
557 | We store the input read into a WORD_DESC. Replace the text of | |
558 | the redirectee.word with the new input text. If <<- is on, | |
559 | then remove leading TABS from each line. */ | |
726f6388 | 560 | void |
3185942a | 561 | make_here_document (temp, lineno) |
726f6388 | 562 | REDIRECT *temp; |
3185942a | 563 | int lineno; |
726f6388 | 564 | { |
ccc6cda3 JA |
565 | int kill_leading, redir_len; |
566 | char *redir_word, *document, *full_line; | |
567 | int document_index, document_size, delim_unquoted; | |
568 | ||
569 | if (temp->instruction != r_deblank_reading_until && | |
570 | temp->instruction != r_reading_until) | |
571 | { | |
b80f6443 | 572 | internal_error (_("make_here_document: bad instruction type %d"), temp->instruction); |
ccc6cda3 JA |
573 | return; |
574 | } | |
575 | ||
576 | kill_leading = temp->instruction == r_deblank_reading_until; | |
577 | ||
578 | document = (char *)NULL; | |
579 | document_index = document_size = 0; | |
580 | ||
581 | /* Quote removal is the only expansion performed on the delimiter | |
582 | for here documents, making it an extremely special case. */ | |
583 | redir_word = string_quote_removal (temp->redirectee.filename->word, 0); | |
584 | ||
585 | /* redirection_expand will return NULL if the expansion results in | |
586 | multiple words or no words. Check for that here, and just abort | |
587 | this here document if it does. */ | |
588 | if (redir_word) | |
589 | redir_len = strlen (redir_word); | |
590 | else | |
591 | { | |
f73dda09 | 592 | temp->here_doc_eof = (char *)xmalloc (1); |
ccc6cda3 JA |
593 | temp->here_doc_eof[0] = '\0'; |
594 | goto document_done; | |
595 | } | |
726f6388 | 596 | |
ccc6cda3 JA |
597 | free (temp->redirectee.filename->word); |
598 | temp->here_doc_eof = redir_word; | |
599 | ||
600 | /* Read lines from wherever lines are coming from. | |
601 | For each line read, if kill_leading, then kill the | |
602 | leading tab characters. | |
603 | If the line matches redir_word exactly, then we have | |
604 | manufactured the document. Otherwise, add the line to the | |
605 | list of lines in the document. */ | |
606 | ||
607 | /* If the here-document delimiter was quoted, the lines should | |
608 | be read verbatim from the input. If it was not quoted, we | |
609 | need to perform backslash-quoted newline removal. */ | |
610 | delim_unquoted = (temp->redirectee.filename->flags & W_QUOTED) == 0; | |
611 | while (full_line = read_secondary_line (delim_unquoted)) | |
726f6388 | 612 | { |
ccc6cda3 JA |
613 | register char *line; |
614 | int len; | |
615 | ||
a0c0a00f | 616 | here_doc_first_line = 0; |
ccc6cda3 JA |
617 | line = full_line; |
618 | line_number++; | |
619 | ||
0628567a JA |
620 | /* If set -v is in effect, echo the line read. read_secondary_line/ |
621 | read_a_line leaves the newline at the end, so don't print another. */ | |
622 | if (echo_input_at_read) | |
623 | fprintf (stderr, "%s", line); | |
624 | ||
ccc6cda3 | 625 | if (kill_leading && *line) |
28ef6c31 | 626 | { |
ccc6cda3 JA |
627 | /* Hack: To be compatible with some Bourne shells, we |
628 | check the word before stripping the whitespace. This | |
629 | is a hack, though. */ | |
630 | if (STREQN (line, redir_word, redir_len) && line[redir_len] == '\n') | |
631 | goto document_done; | |
632 | ||
633 | while (*line == '\t') | |
634 | line++; | |
635 | } | |
636 | ||
637 | if (*line == 0) | |
28ef6c31 | 638 | continue; |
ccc6cda3 JA |
639 | |
640 | if (STREQN (line, redir_word, redir_len) && line[redir_len] == '\n') | |
641 | goto document_done; | |
642 | ||
643 | len = strlen (line); | |
644 | if (len + document_index >= document_size) | |
726f6388 | 645 | { |
bc4cd23c | 646 | document_size = document_size ? 2 * (document_size + len) : len + 2; |
f73dda09 | 647 | document = (char *)xrealloc (document, document_size); |
726f6388 | 648 | } |
ccc6cda3 JA |
649 | |
650 | /* len is guaranteed to be > 0 because of the check for line | |
651 | being an empty string before the call to strlen. */ | |
652 | FASTCOPY (line, document + document_index, len); | |
653 | document_index += len; | |
654 | } | |
655 | ||
3185942a JA |
656 | if (full_line == 0) |
657 | internal_warning (_("here-document at line %d delimited by end-of-file (wanted `%s')"), lineno, redir_word); | |
658 | ||
ccc6cda3 JA |
659 | document_done: |
660 | if (document) | |
661 | document[document_index] = '\0'; | |
662 | else | |
663 | { | |
f73dda09 | 664 | document = (char *)xmalloc (1); |
ccc6cda3 | 665 | document[0] = '\0'; |
726f6388 | 666 | } |
ccc6cda3 | 667 | temp->redirectee.filename->word = document; |
a0c0a00f | 668 | here_doc_first_line = 0; |
726f6388 | 669 | } |
ccc6cda3 JA |
670 | |
671 | /* Generate a REDIRECT from SOURCE, DEST, and INSTRUCTION. | |
726f6388 JA |
672 | INSTRUCTION is the instruction type, SOURCE is a file descriptor, |
673 | and DEST is a file descriptor or a WORD_DESC *. */ | |
674 | REDIRECT * | |
0001803f CR |
675 | make_redirection (source, instruction, dest_and_filename, flags) |
676 | REDIRECTEE source; | |
726f6388 JA |
677 | enum r_instruction instruction; |
678 | REDIRECTEE dest_and_filename; | |
0001803f | 679 | int flags; |
726f6388 | 680 | { |
7117c2d2 JA |
681 | REDIRECT *temp; |
682 | WORD_DESC *w; | |
683 | int wlen; | |
684 | intmax_t lfd; | |
685 | ||
686 | temp = (REDIRECT *)xmalloc (sizeof (REDIRECT)); | |
726f6388 JA |
687 | |
688 | /* First do the common cases. */ | |
689 | temp->redirector = source; | |
690 | temp->redirectee = dest_and_filename; | |
13db572a | 691 | temp->here_doc_eof = 0; |
726f6388 JA |
692 | temp->instruction = instruction; |
693 | temp->flags = 0; | |
0001803f | 694 | temp->rflags = flags; |
726f6388 JA |
695 | temp->next = (REDIRECT *)NULL; |
696 | ||
697 | switch (instruction) | |
698 | { | |
699 | ||
d166f048 JA |
700 | case r_output_direction: /* >foo */ |
701 | case r_output_force: /* >| foo */ | |
3185942a | 702 | case r_err_and_out: /* &>filename */ |
726f6388 JA |
703 | temp->flags = O_TRUNC | O_WRONLY | O_CREAT; |
704 | break; | |
705 | ||
d166f048 | 706 | case r_appending_to: /* >>foo */ |
3185942a | 707 | case r_append_err_and_out: /* &>> filename */ |
d166f048 | 708 | temp->flags = O_APPEND | O_WRONLY | O_CREAT; |
726f6388 JA |
709 | break; |
710 | ||
d166f048 JA |
711 | case r_input_direction: /* <foo */ |
712 | case r_inputa_direction: /* foo & makes this. */ | |
713 | temp->flags = O_RDONLY; | |
726f6388 JA |
714 | break; |
715 | ||
d166f048 JA |
716 | case r_input_output: /* <>foo */ |
717 | temp->flags = O_RDWR | O_CREAT; | |
726f6388 JA |
718 | break; |
719 | ||
d166f048 JA |
720 | case r_deblank_reading_until: /* <<-foo */ |
721 | case r_reading_until: /* << foo */ | |
7117c2d2 | 722 | case r_reading_string: /* <<< foo */ |
ccc6cda3 | 723 | case r_close_this: /* <&- */ |
726f6388 JA |
724 | case r_duplicating_input: /* 1<&2 */ |
725 | case r_duplicating_output: /* 1>&2 */ | |
7117c2d2 JA |
726 | break; |
727 | ||
728 | /* the parser doesn't pass these. */ | |
729 | case r_move_input: /* 1<&2- */ | |
730 | case r_move_output: /* 1>&2- */ | |
731 | case r_move_input_word: /* 1<&$foo- */ | |
732 | case r_move_output_word: /* 1>&$foo- */ | |
733 | break; | |
734 | ||
735 | /* The way the lexer works we have to do this here. */ | |
726f6388 JA |
736 | case r_duplicating_input_word: /* 1<&$foo */ |
737 | case r_duplicating_output_word: /* 1>&$foo */ | |
7117c2d2 JA |
738 | w = dest_and_filename.filename; |
739 | wlen = strlen (w->word) - 1; | |
740 | if (w->word[wlen] == '-') /* Yuck */ | |
741 | { | |
742 | w->word[wlen] = '\0'; | |
743 | if (all_digits (w->word) && legal_number (w->word, &lfd) && lfd == (int)lfd) | |
744 | { | |
745 | dispose_word (w); | |
746 | temp->instruction = (instruction == r_duplicating_input_word) ? r_move_input : r_move_output; | |
747 | temp->redirectee.dest = lfd; | |
748 | } | |
749 | else | |
750 | temp->instruction = (instruction == r_duplicating_input_word) ? r_move_input_word : r_move_output_word; | |
751 | } | |
752 | ||
726f6388 | 753 | break; |
ccc6cda3 | 754 | |
726f6388 | 755 | default: |
b80f6443 | 756 | programming_error (_("make_redirection: redirection instruction `%d' out of range"), instruction); |
726f6388 JA |
757 | abort (); |
758 | break; | |
759 | } | |
760 | return (temp); | |
761 | } | |
762 | ||
763 | COMMAND * | |
ccc6cda3 | 764 | make_function_def (name, command, lineno, lstart) |
726f6388 JA |
765 | WORD_DESC *name; |
766 | COMMAND *command; | |
ccc6cda3 | 767 | int lineno, lstart; |
726f6388 JA |
768 | { |
769 | FUNCTION_DEF *temp; | |
b80f6443 JA |
770 | #if defined (ARRAY_VARS) |
771 | SHELL_VAR *bash_source_v; | |
772 | ARRAY *bash_source_a; | |
b80f6443 | 773 | #endif |
726f6388 JA |
774 | |
775 | temp = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF)); | |
776 | temp->command = command; | |
777 | temp->name = name; | |
ccc6cda3 | 778 | temp->line = lineno; |
cce855bc | 779 | temp->flags = 0; |
ccc6cda3 | 780 | command->line = lstart; |
b80f6443 JA |
781 | |
782 | /* Information used primarily for debugging. */ | |
783 | temp->source_file = 0; | |
784 | #if defined (ARRAY_VARS) | |
785 | GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a); | |
786 | if (bash_source_a && array_num_elements (bash_source_a) > 0) | |
787 | temp->source_file = array_reference (bash_source_a, 0); | |
788 | #endif | |
a0c0a00f CR |
789 | /* Assume that shell functions without a source file before the shell is |
790 | initialized come from the environment. Otherwise default to "main" | |
791 | (usually functions being defined interactively) */ | |
792 | if (temp->source_file == 0) | |
793 | temp->source_file = shell_initialized ? "main" : "environment"; | |
794 | ||
3185942a | 795 | #if defined (DEBUGGER) |
d233b485 | 796 | bind_function_def (name->word, temp, 0); |
3185942a | 797 | #endif |
b80f6443 | 798 | |
ac50fbac | 799 | temp->source_file = temp->source_file ? savestring (temp->source_file) : 0; |
a0c0a00f | 800 | |
726f6388 JA |
801 | return (make_command (cm_function_def, (SIMPLE_COM *)temp)); |
802 | } | |
803 | ||
bb70624e JA |
804 | COMMAND * |
805 | make_subshell_command (command) | |
806 | COMMAND *command; | |
807 | { | |
808 | SUBSHELL_COM *temp; | |
809 | ||
810 | temp = (SUBSHELL_COM *)xmalloc (sizeof (SUBSHELL_COM)); | |
811 | temp->command = command; | |
812 | temp->flags = CMD_WANT_SUBSHELL; | |
d233b485 | 813 | temp->line = line_number; |
bb70624e JA |
814 | return (make_command (cm_subshell, (SIMPLE_COM *)temp)); |
815 | } | |
816 | ||
3185942a JA |
817 | COMMAND * |
818 | make_coproc_command (name, command) | |
819 | char *name; | |
820 | COMMAND *command; | |
821 | { | |
822 | COPROC_COM *temp; | |
823 | ||
824 | temp = (COPROC_COM *)xmalloc (sizeof (COPROC_COM)); | |
825 | temp->name = savestring (name); | |
826 | temp->command = command; | |
827 | temp->flags = CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
828 | return (make_command (cm_coproc, (SIMPLE_COM *)temp)); | |
829 | } | |
830 | ||
726f6388 JA |
831 | /* Reverse the word list and redirection list in the simple command |
832 | has just been parsed. It seems simpler to do this here the one | |
833 | time then by any other method that I can think of. */ | |
834 | COMMAND * | |
835 | clean_simple_command (command) | |
836 | COMMAND *command; | |
837 | { | |
838 | if (command->type != cm_simple) | |
b72432fd | 839 | command_error ("clean_simple_command", CMDERR_BADTYPE, command->type, 0); |
726f6388 JA |
840 | else |
841 | { | |
842 | command->value.Simple->words = | |
843 | REVERSE_LIST (command->value.Simple->words, WORD_LIST *); | |
ccc6cda3 | 844 | command->value.Simple->redirects = |
726f6388 JA |
845 | REVERSE_LIST (command->value.Simple->redirects, REDIRECT *); |
846 | } | |
847 | ||
0001803f | 848 | parser_state &= ~PST_REDIRLIST; |
726f6388 JA |
849 | return (command); |
850 | } | |
851 | ||
726f6388 JA |
852 | /* The Yacc grammar productions have a problem, in that they take a |
853 | list followed by an ampersand (`&') and do a simple command connection, | |
854 | making the entire list effectively asynchronous, instead of just | |
855 | the last command. This means that when the list is executed, all | |
856 | the commands have stdin set to /dev/null when job control is not | |
857 | active, instead of just the last. This is wrong, and needs fixing | |
858 | up. This function takes the `&' and applies it to the last command | |
859 | in the list. This is done only for lists connected by `;'; it makes | |
860 | `;' bind `tighter' than `&'. */ | |
861 | COMMAND * | |
862 | connect_async_list (command, command2, connector) | |
863 | COMMAND *command, *command2; | |
864 | int connector; | |
865 | { | |
866 | COMMAND *t, *t1, *t2; | |
867 | ||
868 | t1 = command; | |
869 | t = command->value.Connection->second; | |
870 | ||
871 | if (!t || (command->flags & CMD_WANT_SUBSHELL) || | |
872 | command->value.Connection->connector != ';') | |
873 | { | |
874 | t = command_connect (command, command2, connector); | |
875 | return t; | |
876 | } | |
877 | ||
878 | /* This is just defensive programming. The Yacc precedence rules | |
879 | will generally hand this function a command where t points directly | |
880 | to the command we want (e.g. given a ; b ; c ; d &, t1 will point | |
881 | to the `a ; b ; c' list and t will be the `d'). We only want to do | |
882 | this if the list is not being executed as a unit in the background | |
883 | with `( ... )', so we have to check for CMD_WANT_SUBSHELL. That's | |
884 | the only way to tell. */ | |
885 | while (((t->flags & CMD_WANT_SUBSHELL) == 0) && t->type == cm_connection && | |
886 | t->value.Connection->connector == ';') | |
887 | { | |
888 | t1 = t; | |
889 | t = t->value.Connection->second; | |
890 | } | |
891 | /* Now we have t pointing to the last command in the list, and | |
892 | t1->value.Connection->second == t. */ | |
893 | t2 = command_connect (t, command2, connector); | |
894 | t1->value.Connection->second = t2; | |
895 | return command; | |
896 | } |