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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 | |
3185942a | 4 | /* Copyright (C) 1989-2009 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 | ||
28ef6c31 | 37 | #include "syntax.h" |
726f6388 JA |
38 | #include "command.h" |
39 | #include "general.h" | |
40 | #include "error.h" | |
41 | #include "flags.h" | |
42 | #include "make_cmd.h" | |
7117c2d2 | 43 | #include "dispose_cmd.h" |
ccc6cda3 | 44 | #include "variables.h" |
726f6388 JA |
45 | #include "subst.h" |
46 | #include "input.h" | |
7117c2d2 | 47 | #include "ocache.h" |
726f6388 JA |
48 | #include "externs.h" |
49 | ||
50 | #if defined (JOB_CONTROL) | |
51 | #include "jobs.h" | |
52 | #endif | |
53 | ||
7117c2d2 JA |
54 | #include "shmbutil.h" |
55 | ||
726f6388 | 56 | extern int line_number, current_command_line_count; |
bb70624e JA |
57 | extern int last_command_exit_value; |
58 | ||
7117c2d2 JA |
59 | /* Object caching */ |
60 | sh_obj_cache_t wdcache = {0, 0, 0}; | |
61 | sh_obj_cache_t wlcache = {0, 0, 0}; | |
62 | ||
63 | #define WDCACHESIZE 60 | |
64 | #define WLCACHESIZE 60 | |
65 | ||
b80f6443 | 66 | static COMMAND *make_for_or_select __P((enum command_type, WORD_DESC *, WORD_LIST *, COMMAND *, int)); |
f73dda09 JA |
67 | #if defined (ARITH_FOR_COMMAND) |
68 | static WORD_LIST *make_arith_for_expr __P((char *)); | |
69 | #endif | |
70 | static COMMAND *make_until_or_while __P((enum command_type, COMMAND *, COMMAND *)); | |
726f6388 | 71 | |
7117c2d2 JA |
72 | void |
73 | cmd_init () | |
74 | { | |
75 | ocache_create (wdcache, WORD_DESC, WDCACHESIZE); | |
76 | ocache_create (wlcache, WORD_LIST, WLCACHESIZE); | |
77 | } | |
78 | ||
95732b49 JA |
79 | WORD_DESC * |
80 | alloc_word_desc () | |
81 | { | |
82 | WORD_DESC *temp; | |
83 | ||
84 | ocache_alloc (wdcache, WORD_DESC, temp); | |
85 | temp->flags = 0; | |
86 | temp->word = 0; | |
87 | return temp; | |
88 | } | |
89 | ||
726f6388 | 90 | WORD_DESC * |
ccc6cda3 | 91 | make_bare_word (string) |
f73dda09 | 92 | const char *string; |
726f6388 JA |
93 | { |
94 | WORD_DESC *temp; | |
95732b49 JA |
95 | |
96 | temp = alloc_word_desc (); | |
7117c2d2 | 97 | |
ccc6cda3 JA |
98 | if (*string) |
99 | temp->word = savestring (string); | |
100 | else | |
726f6388 | 101 | { |
f73dda09 | 102 | temp->word = (char *)xmalloc (1); |
ccc6cda3 | 103 | temp->word[0] = '\0'; |
726f6388 | 104 | } |
ccc6cda3 | 105 | |
726f6388 JA |
106 | return (temp); |
107 | } | |
108 | ||
ccc6cda3 JA |
109 | WORD_DESC * |
110 | make_word_flags (w, string) | |
111 | WORD_DESC *w; | |
f73dda09 | 112 | const char *string; |
ccc6cda3 | 113 | { |
7117c2d2 JA |
114 | register int i; |
115 | size_t slen; | |
116 | DECLARE_MBSTATE; | |
ccc6cda3 | 117 | |
7117c2d2 JA |
118 | i = 0; |
119 | slen = strlen (string); | |
120 | while (i < slen) | |
121 | { | |
122 | switch (string[i]) | |
123 | { | |
ccc6cda3 JA |
124 | case '$': |
125 | w->flags |= W_HASDOLLAR; | |
126 | break; | |
127 | case '\\': | |
128 | break; /* continue the loop */ | |
129 | case '\'': | |
130 | case '`': | |
131 | case '"': | |
132 | w->flags |= W_QUOTED; | |
133 | break; | |
7117c2d2 JA |
134 | } |
135 | ||
136 | ADVANCE_CHAR (string, slen, i); | |
137 | } | |
138 | ||
ccc6cda3 JA |
139 | return (w); |
140 | } | |
141 | ||
142 | WORD_DESC * | |
143 | make_word (string) | |
f73dda09 | 144 | const char *string; |
ccc6cda3 JA |
145 | { |
146 | WORD_DESC *temp; | |
147 | ||
148 | temp = make_bare_word (string); | |
149 | return (make_word_flags (temp, string)); | |
150 | } | |
151 | ||
726f6388 JA |
152 | WORD_DESC * |
153 | make_word_from_token (token) | |
154 | int token; | |
155 | { | |
156 | char tokenizer[2]; | |
157 | ||
158 | tokenizer[0] = token; | |
159 | tokenizer[1] = '\0'; | |
160 | ||
161 | return (make_word (tokenizer)); | |
162 | } | |
163 | ||
164 | WORD_LIST * | |
f73dda09 | 165 | make_word_list (word, wlink) |
726f6388 | 166 | WORD_DESC *word; |
f73dda09 | 167 | WORD_LIST *wlink; |
726f6388 JA |
168 | { |
169 | WORD_LIST *temp; | |
170 | ||
7117c2d2 | 171 | ocache_alloc (wlcache, WORD_LIST, temp); |
95732b49 | 172 | |
726f6388 | 173 | temp->word = word; |
f73dda09 | 174 | temp->next = wlink; |
726f6388 JA |
175 | return (temp); |
176 | } | |
177 | ||
726f6388 JA |
178 | COMMAND * |
179 | make_command (type, pointer) | |
180 | enum command_type type; | |
181 | SIMPLE_COM *pointer; | |
182 | { | |
183 | COMMAND *temp; | |
184 | ||
185 | temp = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
186 | temp->type = type; | |
187 | temp->value.Simple = pointer; | |
ccc6cda3 | 188 | temp->value.Simple->flags = temp->flags = 0; |
726f6388 JA |
189 | temp->redirects = (REDIRECT *)NULL; |
190 | return (temp); | |
191 | } | |
192 | ||
193 | COMMAND * | |
194 | command_connect (com1, com2, connector) | |
195 | COMMAND *com1, *com2; | |
196 | int connector; | |
197 | { | |
198 | CONNECTION *temp; | |
199 | ||
200 | temp = (CONNECTION *)xmalloc (sizeof (CONNECTION)); | |
201 | temp->connector = connector; | |
202 | temp->first = com1; | |
203 | temp->second = com2; | |
204 | return (make_command (cm_connection, (SIMPLE_COM *)temp)); | |
205 | } | |
206 | ||
ccc6cda3 | 207 | static COMMAND * |
b80f6443 | 208 | make_for_or_select (type, name, map_list, action, lineno) |
ccc6cda3 | 209 | enum command_type type; |
726f6388 JA |
210 | WORD_DESC *name; |
211 | WORD_LIST *map_list; | |
212 | COMMAND *action; | |
b80f6443 | 213 | int lineno; |
726f6388 | 214 | { |
ccc6cda3 | 215 | FOR_COM *temp; |
726f6388 | 216 | |
ccc6cda3 | 217 | temp = (FOR_COM *)xmalloc (sizeof (FOR_COM)); |
726f6388 JA |
218 | temp->flags = 0; |
219 | temp->name = name; | |
b80f6443 | 220 | temp->line = lineno; |
726f6388 JA |
221 | temp->map_list = map_list; |
222 | temp->action = action; | |
ccc6cda3 | 223 | return (make_command (type, (SIMPLE_COM *)temp)); |
726f6388 JA |
224 | } |
225 | ||
726f6388 | 226 | COMMAND * |
b80f6443 | 227 | make_for_command (name, map_list, action, lineno) |
726f6388 JA |
228 | WORD_DESC *name; |
229 | WORD_LIST *map_list; | |
230 | COMMAND *action; | |
b80f6443 | 231 | int lineno; |
726f6388 | 232 | { |
b80f6443 | 233 | return (make_for_or_select (cm_for, name, map_list, action, lineno)); |
726f6388 | 234 | } |
ccc6cda3 JA |
235 | |
236 | COMMAND * | |
b80f6443 | 237 | make_select_command (name, map_list, action, lineno) |
ccc6cda3 JA |
238 | WORD_DESC *name; |
239 | WORD_LIST *map_list; | |
240 | COMMAND *action; | |
b80f6443 | 241 | int lineno; |
ccc6cda3 JA |
242 | { |
243 | #if defined (SELECT_COMMAND) | |
b80f6443 | 244 | return (make_for_or_select (cm_select, name, map_list, action, lineno)); |
bb70624e JA |
245 | #else |
246 | last_command_exit_value = 2; | |
247 | return ((COMMAND *)NULL); | |
726f6388 | 248 | #endif |
ccc6cda3 | 249 | } |
726f6388 | 250 | |
bb70624e JA |
251 | #if defined (ARITH_FOR_COMMAND) |
252 | static WORD_LIST * | |
253 | make_arith_for_expr (s) | |
254 | char *s; | |
255 | { | |
256 | WORD_LIST *result; | |
b80f6443 | 257 | WORD_DESC *wd; |
bb70624e JA |
258 | |
259 | if (s == 0 || *s == '\0') | |
260 | return ((WORD_LIST *)NULL); | |
b80f6443 | 261 | wd = make_word (s); |
95732b49 | 262 | wd->flags |= W_NOGLOB|W_NOSPLIT|W_QUOTED|W_DQUOTE; /* no word splitting or globbing */ |
b80f6443 | 263 | result = make_word_list (wd, (WORD_LIST *)NULL); |
bb70624e JA |
264 | return result; |
265 | } | |
266 | #endif | |
267 | ||
b80f6443 JA |
268 | /* Note that this function calls dispose_words on EXPRS, since it doesn't |
269 | use the word list directly. We free it here rather than at the caller | |
270 | because no other function in this file requires that the caller free | |
271 | any arguments. */ | |
bb70624e JA |
272 | COMMAND * |
273 | make_arith_for_command (exprs, action, lineno) | |
274 | WORD_LIST *exprs; | |
275 | COMMAND *action; | |
276 | int lineno; | |
277 | { | |
278 | #if defined (ARITH_FOR_COMMAND) | |
279 | ARITH_FOR_COM *temp; | |
280 | WORD_LIST *init, *test, *step; | |
281 | char *s, *t, *start; | |
f73dda09 | 282 | int nsemi; |
bb70624e JA |
283 | |
284 | init = test = step = (WORD_LIST *)NULL; | |
285 | /* Parse the string into the three component sub-expressions. */ | |
286 | start = t = s = exprs->word->word; | |
287 | for (nsemi = 0; ;) | |
288 | { | |
289 | /* skip whitespace at the start of each sub-expression. */ | |
290 | while (whitespace (*s)) | |
291 | s++; | |
292 | start = s; | |
293 | /* skip to the semicolon or EOS */ | |
294 | while (*s && *s != ';') | |
28ef6c31 | 295 | s++; |
bb70624e JA |
296 | |
297 | t = (s > start) ? substring (start, 0, s - start) : (char *)NULL; | |
298 | ||
299 | nsemi++; | |
300 | switch (nsemi) | |
301 | { | |
302 | case 1: | |
303 | init = make_arith_for_expr (t); | |
304 | break; | |
305 | case 2: | |
306 | test = make_arith_for_expr (t); | |
307 | break; | |
308 | case 3: | |
309 | step = make_arith_for_expr (t); | |
310 | break; | |
311 | } | |
312 | ||
313 | FREE (t); | |
314 | if (*s == '\0') | |
28ef6c31 | 315 | break; |
bb70624e JA |
316 | s++; /* skip over semicolon */ |
317 | } | |
318 | ||
319 | if (nsemi != 3) | |
320 | { | |
321 | if (nsemi < 3) | |
b80f6443 | 322 | parser_error (lineno, _("syntax error: arithmetic expression required")); |
bb70624e | 323 | else |
b80f6443 JA |
324 | parser_error (lineno, _("syntax error: `;' unexpected")); |
325 | parser_error (lineno, _("syntax error: `((%s))'"), exprs->word->word); | |
bb70624e JA |
326 | last_command_exit_value = 2; |
327 | return ((COMMAND *)NULL); | |
328 | } | |
329 | ||
330 | temp = (ARITH_FOR_COM *)xmalloc (sizeof (ARITH_FOR_COM)); | |
331 | temp->flags = 0; | |
332 | temp->line = lineno; | |
333 | temp->init = init ? init : make_arith_for_expr ("1"); | |
334 | temp->test = test ? test : make_arith_for_expr ("1"); | |
335 | temp->step = step ? step : make_arith_for_expr ("1"); | |
336 | temp->action = action; | |
337 | ||
b80f6443 | 338 | dispose_words (exprs); |
bb70624e JA |
339 | return (make_command (cm_arith_for, (SIMPLE_COM *)temp)); |
340 | #else | |
b80f6443 | 341 | dispose_words (exprs); |
bb70624e JA |
342 | last_command_exit_value = 2; |
343 | return ((COMMAND *)NULL); | |
344 | #endif /* ARITH_FOR_COMMAND */ | |
345 | } | |
346 | ||
726f6388 JA |
347 | COMMAND * |
348 | make_group_command (command) | |
349 | COMMAND *command; | |
350 | { | |
ccc6cda3 | 351 | GROUP_COM *temp; |
726f6388 | 352 | |
ccc6cda3 | 353 | temp = (GROUP_COM *)xmalloc (sizeof (GROUP_COM)); |
726f6388 JA |
354 | temp->command = command; |
355 | return (make_command (cm_group, (SIMPLE_COM *)temp)); | |
356 | } | |
357 | ||
358 | COMMAND * | |
b80f6443 | 359 | make_case_command (word, clauses, lineno) |
726f6388 JA |
360 | WORD_DESC *word; |
361 | PATTERN_LIST *clauses; | |
95732b49 | 362 | int lineno; |
726f6388 JA |
363 | { |
364 | CASE_COM *temp; | |
365 | ||
366 | temp = (CASE_COM *)xmalloc (sizeof (CASE_COM)); | |
367 | temp->flags = 0; | |
b80f6443 | 368 | temp->line = lineno; |
726f6388 JA |
369 | temp->word = word; |
370 | temp->clauses = REVERSE_LIST (clauses, PATTERN_LIST *); | |
371 | return (make_command (cm_case, (SIMPLE_COM *)temp)); | |
372 | } | |
373 | ||
374 | PATTERN_LIST * | |
375 | make_pattern_list (patterns, action) | |
376 | WORD_LIST *patterns; | |
377 | COMMAND *action; | |
378 | { | |
379 | PATTERN_LIST *temp; | |
380 | ||
381 | temp = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST)); | |
382 | temp->patterns = REVERSE_LIST (patterns, WORD_LIST *); | |
383 | temp->action = action; | |
384 | temp->next = NULL; | |
95732b49 | 385 | temp->flags = 0; |
726f6388 JA |
386 | return (temp); |
387 | } | |
388 | ||
389 | COMMAND * | |
390 | make_if_command (test, true_case, false_case) | |
391 | COMMAND *test, *true_case, *false_case; | |
392 | { | |
393 | IF_COM *temp; | |
394 | ||
395 | temp = (IF_COM *)xmalloc (sizeof (IF_COM)); | |
396 | temp->flags = 0; | |
397 | temp->test = test; | |
398 | temp->true_case = true_case; | |
399 | temp->false_case = false_case; | |
400 | return (make_command (cm_if, (SIMPLE_COM *)temp)); | |
401 | } | |
402 | ||
403 | static COMMAND * | |
ccc6cda3 | 404 | make_until_or_while (which, test, action) |
726f6388 | 405 | enum command_type which; |
ccc6cda3 | 406 | COMMAND *test, *action; |
726f6388 JA |
407 | { |
408 | WHILE_COM *temp; | |
409 | ||
410 | temp = (WHILE_COM *)xmalloc (sizeof (WHILE_COM)); | |
411 | temp->flags = 0; | |
412 | temp->test = test; | |
413 | temp->action = action; | |
414 | return (make_command (which, (SIMPLE_COM *)temp)); | |
415 | } | |
416 | ||
417 | COMMAND * | |
418 | make_while_command (test, action) | |
419 | COMMAND *test, *action; | |
420 | { | |
ccc6cda3 | 421 | return (make_until_or_while (cm_while, test, action)); |
726f6388 JA |
422 | } |
423 | ||
424 | COMMAND * | |
425 | make_until_command (test, action) | |
426 | COMMAND *test, *action; | |
427 | { | |
ccc6cda3 | 428 | return (make_until_or_while (cm_until, test, action)); |
726f6388 JA |
429 | } |
430 | ||
cce855bc JA |
431 | COMMAND * |
432 | make_arith_command (exp) | |
433 | WORD_LIST *exp; | |
434 | { | |
435 | #if defined (DPAREN_ARITHMETIC) | |
436 | COMMAND *command; | |
437 | ARITH_COM *temp; | |
438 | ||
439 | command = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
440 | command->value.Arith = temp = (ARITH_COM *)xmalloc (sizeof (ARITH_COM)); | |
441 | ||
442 | temp->flags = 0; | |
443 | temp->line = line_number; | |
444 | temp->exp = exp; | |
445 | ||
446 | command->type = cm_arith; | |
447 | command->redirects = (REDIRECT *)NULL; | |
448 | command->flags = 0; | |
449 | ||
450 | return (command); | |
451 | #else | |
bb70624e | 452 | last_command_exit_value = 2; |
cce855bc JA |
453 | return ((COMMAND *)NULL); |
454 | #endif | |
455 | } | |
456 | ||
457 | #if defined (COND_COMMAND) | |
458 | struct cond_com * | |
459 | make_cond_node (type, op, left, right) | |
460 | int type; | |
461 | WORD_DESC *op; | |
462 | struct cond_com *left, *right; | |
463 | { | |
464 | COND_COM *temp; | |
465 | ||
466 | temp = (COND_COM *)xmalloc (sizeof (COND_COM)); | |
467 | temp->flags = 0; | |
468 | temp->line = line_number; | |
469 | temp->type = type; | |
470 | temp->op = op; | |
471 | temp->left = left; | |
472 | temp->right = right; | |
473 | ||
474 | return (temp); | |
475 | } | |
476 | #endif | |
477 | ||
478 | COMMAND * | |
479 | make_cond_command (cond_node) | |
480 | COND_COM *cond_node; | |
481 | { | |
482 | #if defined (COND_COMMAND) | |
483 | COMMAND *command; | |
484 | ||
485 | command = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
486 | command->value.Cond = cond_node; | |
487 | ||
488 | command->type = cm_cond; | |
489 | command->redirects = (REDIRECT *)NULL; | |
490 | command->flags = 0; | |
b72432fd | 491 | command->line = cond_node ? cond_node->line : 0; |
cce855bc JA |
492 | |
493 | return (command); | |
494 | #else | |
bb70624e | 495 | last_command_exit_value = 2; |
cce855bc JA |
496 | return ((COMMAND *)NULL); |
497 | #endif | |
498 | } | |
499 | ||
726f6388 JA |
500 | COMMAND * |
501 | make_bare_simple_command () | |
502 | { | |
503 | COMMAND *command; | |
ccc6cda3 JA |
504 | SIMPLE_COM *temp; |
505 | ||
506 | command = (COMMAND *)xmalloc (sizeof (COMMAND)); | |
507 | command->value.Simple = temp = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM)); | |
726f6388 JA |
508 | |
509 | temp->flags = 0; | |
510 | temp->line = line_number; | |
511 | temp->words = (WORD_LIST *)NULL; | |
512 | temp->redirects = (REDIRECT *)NULL; | |
ccc6cda3 | 513 | |
726f6388 JA |
514 | command->type = cm_simple; |
515 | command->redirects = (REDIRECT *)NULL; | |
516 | command->flags = 0; | |
ccc6cda3 | 517 | |
726f6388 JA |
518 | return (command); |
519 | } | |
520 | ||
521 | /* Return a command which is the connection of the word or redirection | |
522 | in ELEMENT, and the command * or NULL in COMMAND. */ | |
523 | COMMAND * | |
524 | make_simple_command (element, command) | |
525 | ELEMENT element; | |
526 | COMMAND *command; | |
527 | { | |
528 | /* If we are starting from scratch, then make the initial command | |
529 | structure. Also note that we have to fill in all the slots, since | |
530 | malloc doesn't return zeroed space. */ | |
531 | if (!command) | |
532 | command = make_bare_simple_command (); | |
ccc6cda3 | 533 | |
726f6388 | 534 | if (element.word) |
7117c2d2 | 535 | command->value.Simple->words = make_word_list (element.word, command->value.Simple->words); |
b80f6443 | 536 | else if (element.redirect) |
726f6388 JA |
537 | { |
538 | REDIRECT *r = element.redirect; | |
539 | /* Due to the way <> is implemented, there may be more than a single | |
540 | redirection in element.redirect. We just follow the chain as far | |
541 | as it goes, and hook onto the end. */ | |
542 | while (r->next) | |
543 | r = r->next; | |
544 | r->next = command->value.Simple->redirects; | |
545 | command->value.Simple->redirects = element.redirect; | |
546 | } | |
547 | return (command); | |
548 | } | |
549 | ||
ccc6cda3 JA |
550 | /* Because we are Bourne compatible, we read the input for this |
551 | << or <<- redirection now, from wherever input is coming from. | |
552 | We store the input read into a WORD_DESC. Replace the text of | |
553 | the redirectee.word with the new input text. If <<- is on, | |
554 | then remove leading TABS from each line. */ | |
726f6388 | 555 | void |
3185942a | 556 | make_here_document (temp, lineno) |
726f6388 | 557 | REDIRECT *temp; |
3185942a | 558 | int lineno; |
726f6388 | 559 | { |
ccc6cda3 JA |
560 | int kill_leading, redir_len; |
561 | char *redir_word, *document, *full_line; | |
562 | int document_index, document_size, delim_unquoted; | |
563 | ||
564 | if (temp->instruction != r_deblank_reading_until && | |
565 | temp->instruction != r_reading_until) | |
566 | { | |
b80f6443 | 567 | internal_error (_("make_here_document: bad instruction type %d"), temp->instruction); |
ccc6cda3 JA |
568 | return; |
569 | } | |
570 | ||
571 | kill_leading = temp->instruction == r_deblank_reading_until; | |
572 | ||
573 | document = (char *)NULL; | |
574 | document_index = document_size = 0; | |
575 | ||
576 | /* Quote removal is the only expansion performed on the delimiter | |
577 | for here documents, making it an extremely special case. */ | |
578 | redir_word = string_quote_removal (temp->redirectee.filename->word, 0); | |
579 | ||
580 | /* redirection_expand will return NULL if the expansion results in | |
581 | multiple words or no words. Check for that here, and just abort | |
582 | this here document if it does. */ | |
583 | if (redir_word) | |
584 | redir_len = strlen (redir_word); | |
585 | else | |
586 | { | |
f73dda09 | 587 | temp->here_doc_eof = (char *)xmalloc (1); |
ccc6cda3 JA |
588 | temp->here_doc_eof[0] = '\0'; |
589 | goto document_done; | |
590 | } | |
726f6388 | 591 | |
ccc6cda3 JA |
592 | free (temp->redirectee.filename->word); |
593 | temp->here_doc_eof = redir_word; | |
594 | ||
595 | /* Read lines from wherever lines are coming from. | |
596 | For each line read, if kill_leading, then kill the | |
597 | leading tab characters. | |
598 | If the line matches redir_word exactly, then we have | |
599 | manufactured the document. Otherwise, add the line to the | |
600 | list of lines in the document. */ | |
601 | ||
602 | /* If the here-document delimiter was quoted, the lines should | |
603 | be read verbatim from the input. If it was not quoted, we | |
604 | need to perform backslash-quoted newline removal. */ | |
605 | delim_unquoted = (temp->redirectee.filename->flags & W_QUOTED) == 0; | |
606 | while (full_line = read_secondary_line (delim_unquoted)) | |
726f6388 | 607 | { |
ccc6cda3 JA |
608 | register char *line; |
609 | int len; | |
610 | ||
611 | line = full_line; | |
612 | line_number++; | |
613 | ||
0628567a JA |
614 | /* If set -v is in effect, echo the line read. read_secondary_line/ |
615 | read_a_line leaves the newline at the end, so don't print another. */ | |
616 | if (echo_input_at_read) | |
617 | fprintf (stderr, "%s", line); | |
618 | ||
ccc6cda3 | 619 | if (kill_leading && *line) |
28ef6c31 | 620 | { |
ccc6cda3 JA |
621 | /* Hack: To be compatible with some Bourne shells, we |
622 | check the word before stripping the whitespace. This | |
623 | is a hack, though. */ | |
624 | if (STREQN (line, redir_word, redir_len) && line[redir_len] == '\n') | |
625 | goto document_done; | |
626 | ||
627 | while (*line == '\t') | |
628 | line++; | |
629 | } | |
630 | ||
631 | if (*line == 0) | |
28ef6c31 | 632 | continue; |
ccc6cda3 JA |
633 | |
634 | if (STREQN (line, redir_word, redir_len) && line[redir_len] == '\n') | |
635 | goto document_done; | |
636 | ||
637 | len = strlen (line); | |
638 | if (len + document_index >= document_size) | |
726f6388 | 639 | { |
bc4cd23c | 640 | document_size = document_size ? 2 * (document_size + len) : len + 2; |
f73dda09 | 641 | document = (char *)xrealloc (document, document_size); |
726f6388 | 642 | } |
ccc6cda3 JA |
643 | |
644 | /* len is guaranteed to be > 0 because of the check for line | |
645 | being an empty string before the call to strlen. */ | |
646 | FASTCOPY (line, document + document_index, len); | |
647 | document_index += len; | |
648 | } | |
649 | ||
3185942a JA |
650 | if (full_line == 0) |
651 | internal_warning (_("here-document at line %d delimited by end-of-file (wanted `%s')"), lineno, redir_word); | |
652 | ||
ccc6cda3 JA |
653 | document_done: |
654 | if (document) | |
655 | document[document_index] = '\0'; | |
656 | else | |
657 | { | |
f73dda09 | 658 | document = (char *)xmalloc (1); |
ccc6cda3 | 659 | document[0] = '\0'; |
726f6388 | 660 | } |
ccc6cda3 | 661 | temp->redirectee.filename->word = document; |
726f6388 | 662 | } |
ccc6cda3 JA |
663 | |
664 | /* Generate a REDIRECT from SOURCE, DEST, and INSTRUCTION. | |
726f6388 JA |
665 | INSTRUCTION is the instruction type, SOURCE is a file descriptor, |
666 | and DEST is a file descriptor or a WORD_DESC *. */ | |
667 | REDIRECT * | |
668 | make_redirection (source, instruction, dest_and_filename) | |
669 | int source; | |
670 | enum r_instruction instruction; | |
671 | REDIRECTEE dest_and_filename; | |
672 | { | |
7117c2d2 JA |
673 | REDIRECT *temp; |
674 | WORD_DESC *w; | |
675 | int wlen; | |
676 | intmax_t lfd; | |
677 | ||
678 | temp = (REDIRECT *)xmalloc (sizeof (REDIRECT)); | |
726f6388 JA |
679 | |
680 | /* First do the common cases. */ | |
681 | temp->redirector = source; | |
682 | temp->redirectee = dest_and_filename; | |
683 | temp->instruction = instruction; | |
684 | temp->flags = 0; | |
685 | temp->next = (REDIRECT *)NULL; | |
686 | ||
687 | switch (instruction) | |
688 | { | |
689 | ||
d166f048 JA |
690 | case r_output_direction: /* >foo */ |
691 | case r_output_force: /* >| foo */ | |
3185942a | 692 | case r_err_and_out: /* &>filename */ |
726f6388 JA |
693 | temp->flags = O_TRUNC | O_WRONLY | O_CREAT; |
694 | break; | |
695 | ||
d166f048 | 696 | case r_appending_to: /* >>foo */ |
3185942a | 697 | case r_append_err_and_out: /* &>> filename */ |
d166f048 | 698 | temp->flags = O_APPEND | O_WRONLY | O_CREAT; |
726f6388 JA |
699 | break; |
700 | ||
d166f048 JA |
701 | case r_input_direction: /* <foo */ |
702 | case r_inputa_direction: /* foo & makes this. */ | |
703 | temp->flags = O_RDONLY; | |
726f6388 JA |
704 | break; |
705 | ||
d166f048 JA |
706 | case r_input_output: /* <>foo */ |
707 | temp->flags = O_RDWR | O_CREAT; | |
726f6388 JA |
708 | break; |
709 | ||
d166f048 JA |
710 | case r_deblank_reading_until: /* <<-foo */ |
711 | case r_reading_until: /* << foo */ | |
7117c2d2 | 712 | case r_reading_string: /* <<< foo */ |
ccc6cda3 | 713 | case r_close_this: /* <&- */ |
726f6388 JA |
714 | case r_duplicating_input: /* 1<&2 */ |
715 | case r_duplicating_output: /* 1>&2 */ | |
7117c2d2 JA |
716 | break; |
717 | ||
718 | /* the parser doesn't pass these. */ | |
719 | case r_move_input: /* 1<&2- */ | |
720 | case r_move_output: /* 1>&2- */ | |
721 | case r_move_input_word: /* 1<&$foo- */ | |
722 | case r_move_output_word: /* 1>&$foo- */ | |
723 | break; | |
724 | ||
725 | /* The way the lexer works we have to do this here. */ | |
726f6388 JA |
726 | case r_duplicating_input_word: /* 1<&$foo */ |
727 | case r_duplicating_output_word: /* 1>&$foo */ | |
7117c2d2 JA |
728 | w = dest_and_filename.filename; |
729 | wlen = strlen (w->word) - 1; | |
730 | if (w->word[wlen] == '-') /* Yuck */ | |
731 | { | |
732 | w->word[wlen] = '\0'; | |
733 | if (all_digits (w->word) && legal_number (w->word, &lfd) && lfd == (int)lfd) | |
734 | { | |
735 | dispose_word (w); | |
736 | temp->instruction = (instruction == r_duplicating_input_word) ? r_move_input : r_move_output; | |
737 | temp->redirectee.dest = lfd; | |
738 | } | |
739 | else | |
740 | temp->instruction = (instruction == r_duplicating_input_word) ? r_move_input_word : r_move_output_word; | |
741 | } | |
742 | ||
726f6388 | 743 | break; |
ccc6cda3 | 744 | |
726f6388 | 745 | default: |
b80f6443 | 746 | programming_error (_("make_redirection: redirection instruction `%d' out of range"), instruction); |
726f6388 JA |
747 | abort (); |
748 | break; | |
749 | } | |
750 | return (temp); | |
751 | } | |
752 | ||
753 | COMMAND * | |
ccc6cda3 | 754 | make_function_def (name, command, lineno, lstart) |
726f6388 JA |
755 | WORD_DESC *name; |
756 | COMMAND *command; | |
ccc6cda3 | 757 | int lineno, lstart; |
726f6388 JA |
758 | { |
759 | FUNCTION_DEF *temp; | |
b80f6443 JA |
760 | #if defined (ARRAY_VARS) |
761 | SHELL_VAR *bash_source_v; | |
762 | ARRAY *bash_source_a; | |
b80f6443 | 763 | #endif |
726f6388 JA |
764 | |
765 | temp = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF)); | |
766 | temp->command = command; | |
767 | temp->name = name; | |
ccc6cda3 | 768 | temp->line = lineno; |
cce855bc | 769 | temp->flags = 0; |
ccc6cda3 | 770 | command->line = lstart; |
b80f6443 JA |
771 | |
772 | /* Information used primarily for debugging. */ | |
773 | temp->source_file = 0; | |
774 | #if defined (ARRAY_VARS) | |
775 | GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a); | |
776 | if (bash_source_a && array_num_elements (bash_source_a) > 0) | |
777 | temp->source_file = array_reference (bash_source_a, 0); | |
778 | #endif | |
3185942a | 779 | #if defined (DEBUGGER) |
b80f6443 | 780 | bind_function_def (name->word, temp); |
3185942a | 781 | #endif |
b80f6443 JA |
782 | |
783 | temp->source_file = 0; | |
726f6388 JA |
784 | return (make_command (cm_function_def, (SIMPLE_COM *)temp)); |
785 | } | |
786 | ||
bb70624e JA |
787 | COMMAND * |
788 | make_subshell_command (command) | |
789 | COMMAND *command; | |
790 | { | |
791 | SUBSHELL_COM *temp; | |
792 | ||
793 | temp = (SUBSHELL_COM *)xmalloc (sizeof (SUBSHELL_COM)); | |
794 | temp->command = command; | |
795 | temp->flags = CMD_WANT_SUBSHELL; | |
796 | return (make_command (cm_subshell, (SIMPLE_COM *)temp)); | |
797 | } | |
798 | ||
3185942a JA |
799 | COMMAND * |
800 | make_coproc_command (name, command) | |
801 | char *name; | |
802 | COMMAND *command; | |
803 | { | |
804 | COPROC_COM *temp; | |
805 | ||
806 | temp = (COPROC_COM *)xmalloc (sizeof (COPROC_COM)); | |
807 | temp->name = savestring (name); | |
808 | temp->command = command; | |
809 | temp->flags = CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
810 | return (make_command (cm_coproc, (SIMPLE_COM *)temp)); | |
811 | } | |
812 | ||
726f6388 JA |
813 | /* Reverse the word list and redirection list in the simple command |
814 | has just been parsed. It seems simpler to do this here the one | |
815 | time then by any other method that I can think of. */ | |
816 | COMMAND * | |
817 | clean_simple_command (command) | |
818 | COMMAND *command; | |
819 | { | |
820 | if (command->type != cm_simple) | |
b72432fd | 821 | command_error ("clean_simple_command", CMDERR_BADTYPE, command->type, 0); |
726f6388 JA |
822 | else |
823 | { | |
824 | command->value.Simple->words = | |
825 | REVERSE_LIST (command->value.Simple->words, WORD_LIST *); | |
ccc6cda3 | 826 | command->value.Simple->redirects = |
726f6388 JA |
827 | REVERSE_LIST (command->value.Simple->redirects, REDIRECT *); |
828 | } | |
829 | ||
830 | return (command); | |
831 | } | |
832 | ||
726f6388 JA |
833 | /* The Yacc grammar productions have a problem, in that they take a |
834 | list followed by an ampersand (`&') and do a simple command connection, | |
835 | making the entire list effectively asynchronous, instead of just | |
836 | the last command. This means that when the list is executed, all | |
837 | the commands have stdin set to /dev/null when job control is not | |
838 | active, instead of just the last. This is wrong, and needs fixing | |
839 | up. This function takes the `&' and applies it to the last command | |
840 | in the list. This is done only for lists connected by `;'; it makes | |
841 | `;' bind `tighter' than `&'. */ | |
842 | COMMAND * | |
843 | connect_async_list (command, command2, connector) | |
844 | COMMAND *command, *command2; | |
845 | int connector; | |
846 | { | |
847 | COMMAND *t, *t1, *t2; | |
848 | ||
849 | t1 = command; | |
850 | t = command->value.Connection->second; | |
851 | ||
852 | if (!t || (command->flags & CMD_WANT_SUBSHELL) || | |
853 | command->value.Connection->connector != ';') | |
854 | { | |
855 | t = command_connect (command, command2, connector); | |
856 | return t; | |
857 | } | |
858 | ||
859 | /* This is just defensive programming. The Yacc precedence rules | |
860 | will generally hand this function a command where t points directly | |
861 | to the command we want (e.g. given a ; b ; c ; d &, t1 will point | |
862 | to the `a ; b ; c' list and t will be the `d'). We only want to do | |
863 | this if the list is not being executed as a unit in the background | |
864 | with `( ... )', so we have to check for CMD_WANT_SUBSHELL. That's | |
865 | the only way to tell. */ | |
866 | while (((t->flags & CMD_WANT_SUBSHELL) == 0) && t->type == cm_connection && | |
867 | t->value.Connection->connector == ';') | |
868 | { | |
869 | t1 = t; | |
870 | t = t->value.Connection->second; | |
871 | } | |
872 | /* Now we have t pointing to the last command in the list, and | |
873 | t1->value.Connection->second == t. */ | |
874 | t2 = command_connect (t, command2, connector); | |
875 | t1->value.Connection->second = t2; | |
876 | return command; | |
877 | } |