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726f6388 JA |
1 | /* copy_command.c -- copy a COMMAND structure. This is needed |
2 | primarily for making function definitions, but I'm not sure | |
3 | that anyone else will need it. */ | |
4 | ||
3185942a | 5 | /* Copyright (C) 1987-2009 Free Software Foundation, Inc. |
726f6388 JA |
6 | |
7 | This file is part of GNU Bash, the Bourne Again SHell. | |
8 | ||
3185942a JA |
9 | Bash is free software: you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation, either version 3 of the License, or | |
12 | (at your option) any later version. | |
726f6388 | 13 | |
3185942a JA |
14 | Bash is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
726f6388 JA |
18 | |
19 | You should have received a copy of the GNU General Public License | |
3185942a JA |
20 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
21 | */ | |
726f6388 | 22 | |
ccc6cda3 JA |
23 | #include "config.h" |
24 | ||
cce855bc | 25 | #include "bashtypes.h" |
726f6388 | 26 | |
ccc6cda3 JA |
27 | #if defined (HAVE_UNISTD_H) |
28 | # include <unistd.h> | |
29 | #endif | |
30 | ||
cce855bc JA |
31 | #include <stdio.h> |
32 | ||
726f6388 JA |
33 | #include "shell.h" |
34 | ||
f73dda09 JA |
35 | static PATTERN_LIST *copy_case_clause __P((PATTERN_LIST *)); |
36 | static PATTERN_LIST *copy_case_clauses __P((PATTERN_LIST *)); | |
37 | static FOR_COM *copy_for_command __P((FOR_COM *)); | |
38 | #if defined (ARITH_FOR_COMMAND) | |
39 | static ARITH_FOR_COM *copy_arith_for_command __P((ARITH_FOR_COM *)); | |
40 | #endif | |
41 | static GROUP_COM *copy_group_command __P((GROUP_COM *)); | |
42 | static SUBSHELL_COM *copy_subshell_command __P((SUBSHELL_COM *)); | |
3185942a | 43 | static COPROC_COM *copy_coproc_command __P((COPROC_COM *)); |
f73dda09 JA |
44 | static CASE_COM *copy_case_command __P((CASE_COM *)); |
45 | static WHILE_COM *copy_while_command __P((WHILE_COM *)); | |
46 | static IF_COM *copy_if_command __P((IF_COM *)); | |
47 | #if defined (DPAREN_ARITHMETIC) | |
48 | static ARITH_COM *copy_arith_command __P((ARITH_COM *)); | |
49 | #endif | |
50 | #if defined (COND_COMMAND) | |
51 | static COND_COM *copy_cond_command __P((COND_COM *)); | |
52 | #endif | |
53 | static SIMPLE_COM *copy_simple_command __P((SIMPLE_COM *)); | |
f73dda09 | 54 | |
726f6388 | 55 | WORD_DESC * |
cce855bc JA |
56 | copy_word (w) |
57 | WORD_DESC *w; | |
726f6388 | 58 | { |
ccc6cda3 JA |
59 | WORD_DESC *new_word; |
60 | ||
7117c2d2 | 61 | new_word = make_bare_word (w->word); |
28ef6c31 | 62 | new_word->flags = w->flags; |
726f6388 JA |
63 | return (new_word); |
64 | } | |
65 | ||
ccc6cda3 | 66 | /* Copy the chain of words in LIST. Return a pointer to |
726f6388 JA |
67 | the new chain. */ |
68 | WORD_LIST * | |
69 | copy_word_list (list) | |
70 | WORD_LIST *list; | |
71 | { | |
7117c2d2 | 72 | WORD_LIST *new_list; |
726f6388 | 73 | |
ccc6cda3 | 74 | for (new_list = (WORD_LIST *)NULL; list; list = list->next) |
7117c2d2 JA |
75 | new_list = make_word_list (copy_word (list->word), new_list); |
76 | ||
726f6388 JA |
77 | return (REVERSE_LIST (new_list, WORD_LIST *)); |
78 | } | |
79 | ||
80 | static PATTERN_LIST * | |
81 | copy_case_clause (clause) | |
82 | PATTERN_LIST *clause; | |
83 | { | |
ccc6cda3 JA |
84 | PATTERN_LIST *new_clause; |
85 | ||
86 | new_clause = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST)); | |
726f6388 JA |
87 | new_clause->patterns = copy_word_list (clause->patterns); |
88 | new_clause->action = copy_command (clause->action); | |
3185942a | 89 | new_clause->flags = clause->flags; |
726f6388 JA |
90 | return (new_clause); |
91 | } | |
92 | ||
93 | static PATTERN_LIST * | |
94 | copy_case_clauses (clauses) | |
95 | PATTERN_LIST *clauses; | |
96 | { | |
ccc6cda3 | 97 | PATTERN_LIST *new_list, *new_clause; |
726f6388 | 98 | |
ccc6cda3 | 99 | for (new_list = (PATTERN_LIST *)NULL; clauses; clauses = clauses->next) |
726f6388 | 100 | { |
ccc6cda3 | 101 | new_clause = copy_case_clause (clauses); |
726f6388 JA |
102 | new_clause->next = new_list; |
103 | new_list = new_clause; | |
726f6388 JA |
104 | } |
105 | return (REVERSE_LIST (new_list, PATTERN_LIST *)); | |
106 | } | |
107 | ||
108 | /* Copy a single redirect. */ | |
109 | REDIRECT * | |
110 | copy_redirect (redirect) | |
111 | REDIRECT *redirect; | |
112 | { | |
ccc6cda3 JA |
113 | REDIRECT *new_redirect; |
114 | ||
115 | new_redirect = (REDIRECT *)xmalloc (sizeof (REDIRECT)); | |
0001803f | 116 | #if 0 |
726f6388 | 117 | FASTCOPY ((char *)redirect, (char *)new_redirect, (sizeof (REDIRECT))); |
0001803f CR |
118 | #else |
119 | *new_redirect = *redirect; /* let the compiler do the fast structure copy */ | |
120 | #endif | |
121 | ||
122 | if (redirect->rflags & REDIR_VARASSIGN) | |
123 | new_redirect->redirector.filename = copy_word (redirect->redirector.filename); | |
124 | ||
726f6388 JA |
125 | switch (redirect->instruction) |
126 | { | |
127 | case r_reading_until: | |
128 | case r_deblank_reading_until: | |
13db572a | 129 | new_redirect->here_doc_eof = redirect->here_doc_eof ? savestring (redirect->here_doc_eof) : 0; |
ccc6cda3 | 130 | /*FALLTHROUGH*/ |
7117c2d2 | 131 | case r_reading_string: |
726f6388 JA |
132 | case r_appending_to: |
133 | case r_output_direction: | |
134 | case r_input_direction: | |
135 | case r_inputa_direction: | |
136 | case r_err_and_out: | |
3185942a | 137 | case r_append_err_and_out: |
726f6388 JA |
138 | case r_input_output: |
139 | case r_output_force: | |
140 | case r_duplicating_input_word: | |
141 | case r_duplicating_output_word: | |
7117c2d2 JA |
142 | case r_move_input_word: |
143 | case r_move_output_word: | |
ccc6cda3 | 144 | new_redirect->redirectee.filename = copy_word (redirect->redirectee.filename); |
726f6388 | 145 | break; |
d166f048 JA |
146 | case r_duplicating_input: |
147 | case r_duplicating_output: | |
7117c2d2 JA |
148 | case r_move_input: |
149 | case r_move_output: | |
d166f048 JA |
150 | case r_close_this: |
151 | break; | |
726f6388 JA |
152 | } |
153 | return (new_redirect); | |
154 | } | |
ccc6cda3 | 155 | |
726f6388 JA |
156 | REDIRECT * |
157 | copy_redirects (list) | |
158 | REDIRECT *list; | |
159 | { | |
ccc6cda3 | 160 | REDIRECT *new_list, *temp; |
726f6388 | 161 | |
ccc6cda3 | 162 | for (new_list = (REDIRECT *)NULL; list; list = list->next) |
726f6388 | 163 | { |
ccc6cda3 | 164 | temp = copy_redirect (list); |
726f6388 JA |
165 | temp->next = new_list; |
166 | new_list = temp; | |
726f6388 JA |
167 | } |
168 | return (REVERSE_LIST (new_list, REDIRECT *)); | |
169 | } | |
ccc6cda3 | 170 | |
726f6388 JA |
171 | static FOR_COM * |
172 | copy_for_command (com) | |
173 | FOR_COM *com; | |
174 | { | |
ccc6cda3 JA |
175 | FOR_COM *new_for; |
176 | ||
177 | new_for = (FOR_COM *)xmalloc (sizeof (FOR_COM)); | |
726f6388 | 178 | new_for->flags = com->flags; |
b80f6443 | 179 | new_for->line = com->line; |
726f6388 JA |
180 | new_for->name = copy_word (com->name); |
181 | new_for->map_list = copy_word_list (com->map_list); | |
182 | new_for->action = copy_command (com->action); | |
183 | return (new_for); | |
184 | } | |
185 | ||
bb70624e JA |
186 | #if defined (ARITH_FOR_COMMAND) |
187 | static ARITH_FOR_COM * | |
188 | copy_arith_for_command (com) | |
189 | ARITH_FOR_COM *com; | |
190 | { | |
191 | ARITH_FOR_COM *new_arith_for; | |
192 | ||
193 | new_arith_for = (ARITH_FOR_COM *)xmalloc (sizeof (ARITH_FOR_COM)); | |
194 | new_arith_for->flags = com->flags; | |
195 | new_arith_for->line = com->line; | |
196 | new_arith_for->init = copy_word_list (com->init); | |
197 | new_arith_for->test = copy_word_list (com->test); | |
198 | new_arith_for->step = copy_word_list (com->step); | |
199 | new_arith_for->action = copy_command (com->action); | |
200 | return (new_arith_for); | |
201 | } | |
202 | #endif /* ARITH_FOR_COMMAND */ | |
203 | ||
726f6388 JA |
204 | static GROUP_COM * |
205 | copy_group_command (com) | |
206 | GROUP_COM *com; | |
207 | { | |
ccc6cda3 | 208 | GROUP_COM *new_group; |
726f6388 | 209 | |
ccc6cda3 | 210 | new_group = (GROUP_COM *)xmalloc (sizeof (GROUP_COM)); |
726f6388 JA |
211 | new_group->command = copy_command (com->command); |
212 | return (new_group); | |
213 | } | |
214 | ||
bb70624e JA |
215 | static SUBSHELL_COM * |
216 | copy_subshell_command (com) | |
217 | SUBSHELL_COM *com; | |
218 | { | |
219 | SUBSHELL_COM *new_subshell; | |
220 | ||
221 | new_subshell = (SUBSHELL_COM *)xmalloc (sizeof (SUBSHELL_COM)); | |
222 | new_subshell->command = copy_command (com->command); | |
223 | new_subshell->flags = com->flags; | |
224 | return (new_subshell); | |
225 | } | |
226 | ||
3185942a JA |
227 | static COPROC_COM * |
228 | copy_coproc_command (com) | |
229 | COPROC_COM *com; | |
230 | { | |
231 | COPROC_COM *new_coproc; | |
232 | ||
233 | new_coproc = (COPROC_COM *)xmalloc (sizeof (COPROC_COM)); | |
234 | new_coproc->name = savestring (com->name); | |
235 | new_coproc->command = copy_command (com->command); | |
236 | new_coproc->flags = com->flags; | |
237 | return (new_coproc); | |
238 | } | |
239 | ||
726f6388 JA |
240 | static CASE_COM * |
241 | copy_case_command (com) | |
242 | CASE_COM *com; | |
243 | { | |
ccc6cda3 | 244 | CASE_COM *new_case; |
726f6388 | 245 | |
ccc6cda3 | 246 | new_case = (CASE_COM *)xmalloc (sizeof (CASE_COM)); |
726f6388 | 247 | new_case->flags = com->flags; |
b80f6443 | 248 | new_case->line = com->line; |
726f6388 JA |
249 | new_case->word = copy_word (com->word); |
250 | new_case->clauses = copy_case_clauses (com->clauses); | |
251 | return (new_case); | |
252 | } | |
253 | ||
254 | static WHILE_COM * | |
255 | copy_while_command (com) | |
256 | WHILE_COM *com; | |
257 | { | |
ccc6cda3 | 258 | WHILE_COM *new_while; |
726f6388 | 259 | |
ccc6cda3 | 260 | new_while = (WHILE_COM *)xmalloc (sizeof (WHILE_COM)); |
726f6388 JA |
261 | new_while->flags = com->flags; |
262 | new_while->test = copy_command (com->test); | |
263 | new_while->action = copy_command (com->action); | |
264 | return (new_while); | |
265 | } | |
266 | ||
267 | static IF_COM * | |
268 | copy_if_command (com) | |
269 | IF_COM *com; | |
270 | { | |
ccc6cda3 | 271 | IF_COM *new_if; |
726f6388 | 272 | |
ccc6cda3 | 273 | new_if = (IF_COM *)xmalloc (sizeof (IF_COM)); |
726f6388 JA |
274 | new_if->flags = com->flags; |
275 | new_if->test = copy_command (com->test); | |
276 | new_if->true_case = copy_command (com->true_case); | |
7117c2d2 | 277 | new_if->false_case = com->false_case ? copy_command (com->false_case) : com->false_case; |
726f6388 JA |
278 | return (new_if); |
279 | } | |
280 | ||
cce855bc JA |
281 | #if defined (DPAREN_ARITHMETIC) |
282 | static ARITH_COM * | |
283 | copy_arith_command (com) | |
284 | ARITH_COM *com; | |
285 | { | |
286 | ARITH_COM *new_arith; | |
287 | ||
288 | new_arith = (ARITH_COM *)xmalloc (sizeof (ARITH_COM)); | |
289 | new_arith->flags = com->flags; | |
290 | new_arith->exp = copy_word_list (com->exp); | |
291 | new_arith->line = com->line; | |
292 | ||
293 | return (new_arith); | |
294 | } | |
295 | #endif | |
296 | ||
297 | #if defined (COND_COMMAND) | |
298 | static COND_COM * | |
299 | copy_cond_command (com) | |
300 | COND_COM *com; | |
301 | { | |
302 | COND_COM *new_cond; | |
303 | ||
304 | new_cond = (COND_COM *)xmalloc (sizeof (COND_COM)); | |
305 | new_cond->flags = com->flags; | |
306 | new_cond->line = com->line; | |
bc4cd23c JA |
307 | new_cond->type = com->type; |
308 | new_cond->op = com->op ? copy_word (com->op) : com->op; | |
cce855bc JA |
309 | new_cond->left = com->left ? copy_cond_command (com->left) : (COND_COM *)NULL; |
310 | new_cond->right = com->right ? copy_cond_command (com->right) : (COND_COM *)NULL; | |
311 | ||
312 | return (new_cond); | |
313 | } | |
314 | #endif | |
315 | ||
726f6388 JA |
316 | static SIMPLE_COM * |
317 | copy_simple_command (com) | |
318 | SIMPLE_COM *com; | |
319 | { | |
cce855bc | 320 | SIMPLE_COM *new_simple; |
726f6388 | 321 | |
cce855bc | 322 | new_simple = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM)); |
726f6388 JA |
323 | new_simple->flags = com->flags; |
324 | new_simple->words = copy_word_list (com->words); | |
7117c2d2 | 325 | new_simple->redirects = com->redirects ? copy_redirects (com->redirects) : (REDIRECT *)NULL; |
726f6388 JA |
326 | new_simple->line = com->line; |
327 | return (new_simple); | |
328 | } | |
329 | ||
b80f6443 JA |
330 | FUNCTION_DEF * |
331 | copy_function_def_contents (old, new_def) | |
332 | FUNCTION_DEF *old, *new_def; | |
333 | { | |
334 | new_def->name = copy_word (old->name); | |
335 | new_def->command = old->command ? copy_command (old->command) : old->command; | |
336 | new_def->flags = old->flags; | |
337 | new_def->line = old->line; | |
338 | new_def->source_file = old->source_file ? savestring (old->source_file) : old->source_file; | |
339 | return (new_def); | |
340 | } | |
341 | ||
342 | FUNCTION_DEF * | |
726f6388 JA |
343 | copy_function_def (com) |
344 | FUNCTION_DEF *com; | |
345 | { | |
ccc6cda3 | 346 | FUNCTION_DEF *new_def; |
726f6388 | 347 | |
ccc6cda3 | 348 | new_def = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF)); |
b80f6443 | 349 | new_def = copy_function_def_contents (com, new_def); |
726f6388 JA |
350 | return (new_def); |
351 | } | |
352 | ||
353 | /* Copy the command structure in COMMAND. Return a pointer to the | |
354 | copy. Don't you forget to dispose_command () on this pointer | |
355 | later! */ | |
356 | COMMAND * | |
357 | copy_command (command) | |
358 | COMMAND *command; | |
359 | { | |
ccc6cda3 | 360 | COMMAND *new_command; |
726f6388 | 361 | |
ccc6cda3 JA |
362 | if (command == NULL) |
363 | return (command); | |
726f6388 | 364 | |
ccc6cda3 JA |
365 | new_command = (COMMAND *)xmalloc (sizeof (COMMAND)); |
366 | FASTCOPY ((char *)command, (char *)new_command, sizeof (COMMAND)); | |
367 | new_command->flags = command->flags; | |
368 | new_command->line = command->line; | |
726f6388 | 369 | |
ccc6cda3 JA |
370 | if (command->redirects) |
371 | new_command->redirects = copy_redirects (command->redirects); | |
372 | ||
373 | switch (command->type) | |
374 | { | |
375 | case cm_for: | |
376 | new_command->value.For = copy_for_command (command->value.For); | |
377 | break; | |
726f6388 | 378 | |
bb70624e JA |
379 | #if defined (ARITH_FOR_COMMAND) |
380 | case cm_arith_for: | |
381 | new_command->value.ArithFor = copy_arith_for_command (command->value.ArithFor); | |
382 | break; | |
383 | #endif | |
384 | ||
726f6388 | 385 | #if defined (SELECT_COMMAND) |
ccc6cda3 JA |
386 | case cm_select: |
387 | new_command->value.Select = | |
388 | (SELECT_COM *)copy_for_command ((FOR_COM *)command->value.Select); | |
389 | break; | |
726f6388 JA |
390 | #endif |
391 | ||
ccc6cda3 JA |
392 | case cm_group: |
393 | new_command->value.Group = copy_group_command (command->value.Group); | |
394 | break; | |
726f6388 | 395 | |
bb70624e | 396 | case cm_subshell: |
28ef6c31 JA |
397 | new_command->value.Subshell = copy_subshell_command (command->value.Subshell); |
398 | break; | |
bb70624e | 399 | |
3185942a JA |
400 | case cm_coproc: |
401 | new_command->value.Coproc = copy_coproc_command (command->value.Coproc); | |
402 | break; | |
403 | ||
ccc6cda3 JA |
404 | case cm_case: |
405 | new_command->value.Case = copy_case_command (command->value.Case); | |
406 | break; | |
407 | ||
408 | case cm_until: | |
409 | case cm_while: | |
410 | new_command->value.While = copy_while_command (command->value.While); | |
411 | break; | |
412 | ||
413 | case cm_if: | |
414 | new_command->value.If = copy_if_command (command->value.If); | |
415 | break; | |
416 | ||
cce855bc JA |
417 | #if defined (DPAREN_ARITHMETIC) |
418 | case cm_arith: | |
28ef6c31 JA |
419 | new_command->value.Arith = copy_arith_command (command->value.Arith); |
420 | break; | |
cce855bc JA |
421 | #endif |
422 | ||
423 | #if defined (COND_COMMAND) | |
424 | case cm_cond: | |
425 | new_command->value.Cond = copy_cond_command (command->value.Cond); | |
426 | break; | |
427 | #endif | |
428 | ||
ccc6cda3 JA |
429 | case cm_simple: |
430 | new_command->value.Simple = copy_simple_command (command->value.Simple); | |
431 | break; | |
432 | ||
433 | case cm_connection: | |
434 | { | |
435 | CONNECTION *new_connection; | |
436 | ||
437 | new_connection = (CONNECTION *)xmalloc (sizeof (CONNECTION)); | |
438 | new_connection->connector = command->value.Connection->connector; | |
439 | new_connection->first = copy_command (command->value.Connection->first); | |
440 | new_connection->second = copy_command (command->value.Connection->second); | |
441 | new_command->value.Connection = new_connection; | |
726f6388 JA |
442 | break; |
443 | } | |
ccc6cda3 JA |
444 | |
445 | case cm_function_def: | |
446 | new_command->value.Function_def = copy_function_def (command->value.Function_def); | |
447 | break; | |
726f6388 JA |
448 | } |
449 | return (new_command); | |
450 | } |