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1 | /* dispose_command.c -- dispose of a COMMAND structure. */ | |
2 | ||
3 | /* Copyright (C) 1987-2009 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
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 | */ | |
20 | ||
21 | #include "config.h" | |
22 | ||
23 | #include "bashtypes.h" | |
24 | ||
25 | #if defined (HAVE_UNISTD_H) | |
26 | # include <unistd.h> | |
27 | #endif | |
28 | ||
29 | #include "bashansi.h" | |
30 | #include "shell.h" | |
31 | ||
32 | extern sh_obj_cache_t wdcache, wlcache; | |
33 | ||
34 | /* Dispose of the command structure passed. */ | |
35 | void | |
36 | dispose_command (command) | |
37 | COMMAND *command; | |
38 | { | |
39 | if (command == 0) | |
40 | return; | |
41 | ||
42 | if (command->redirects) | |
43 | dispose_redirects (command->redirects); | |
44 | ||
45 | switch (command->type) | |
46 | { | |
47 | case cm_for: | |
48 | #if defined (SELECT_COMMAND) | |
49 | case cm_select: | |
50 | #endif | |
51 | { | |
52 | register FOR_COM *c; | |
53 | #if defined (SELECT_COMMAND) | |
54 | if (command->type == cm_select) | |
55 | c = (FOR_COM *)command->value.Select; | |
56 | else | |
57 | #endif | |
58 | c = command->value.For; | |
59 | dispose_word (c->name); | |
60 | dispose_words (c->map_list); | |
61 | dispose_command (c->action); | |
62 | free (c); | |
63 | break; | |
64 | } | |
65 | ||
66 | #if defined (ARITH_FOR_COMMAND) | |
67 | case cm_arith_for: | |
68 | { | |
69 | register ARITH_FOR_COM *c; | |
70 | ||
71 | c = command->value.ArithFor; | |
72 | dispose_words (c->init); | |
73 | dispose_words (c->test); | |
74 | dispose_words (c->step); | |
75 | dispose_command (c->action); | |
76 | free (c); | |
77 | break; | |
78 | } | |
79 | #endif /* ARITH_FOR_COMMAND */ | |
80 | ||
81 | case cm_group: | |
82 | { | |
83 | dispose_command (command->value.Group->command); | |
84 | free (command->value.Group); | |
85 | break; | |
86 | } | |
87 | ||
88 | case cm_subshell: | |
89 | { | |
90 | dispose_command (command->value.Subshell->command); | |
91 | free (command->value.Subshell); | |
92 | break; | |
93 | } | |
94 | ||
95 | case cm_coproc: | |
96 | { | |
97 | free (command->value.Coproc->name); | |
98 | dispose_command (command->value.Coproc->command); | |
99 | free (command->value.Coproc); | |
100 | break; | |
101 | } | |
102 | ||
103 | case cm_case: | |
104 | { | |
105 | register CASE_COM *c; | |
106 | PATTERN_LIST *t, *p; | |
107 | ||
108 | c = command->value.Case; | |
109 | dispose_word (c->word); | |
110 | ||
111 | for (p = c->clauses; p; ) | |
112 | { | |
113 | dispose_words (p->patterns); | |
114 | dispose_command (p->action); | |
115 | t = p; | |
116 | p = p->next; | |
117 | free (t); | |
118 | } | |
119 | free (c); | |
120 | break; | |
121 | } | |
122 | ||
123 | case cm_until: | |
124 | case cm_while: | |
125 | { | |
126 | register WHILE_COM *c; | |
127 | ||
128 | c = command->value.While; | |
129 | dispose_command (c->test); | |
130 | dispose_command (c->action); | |
131 | free (c); | |
132 | break; | |
133 | } | |
134 | ||
135 | case cm_if: | |
136 | { | |
137 | register IF_COM *c; | |
138 | ||
139 | c = command->value.If; | |
140 | dispose_command (c->test); | |
141 | dispose_command (c->true_case); | |
142 | dispose_command (c->false_case); | |
143 | free (c); | |
144 | break; | |
145 | } | |
146 | ||
147 | case cm_simple: | |
148 | { | |
149 | register SIMPLE_COM *c; | |
150 | ||
151 | c = command->value.Simple; | |
152 | dispose_words (c->words); | |
153 | dispose_redirects (c->redirects); | |
154 | free (c); | |
155 | break; | |
156 | } | |
157 | ||
158 | case cm_connection: | |
159 | { | |
160 | register CONNECTION *c; | |
161 | ||
162 | c = command->value.Connection; | |
163 | dispose_command (c->first); | |
164 | dispose_command (c->second); | |
165 | free (c); | |
166 | break; | |
167 | } | |
168 | ||
169 | #if defined (DPAREN_ARITHMETIC) | |
170 | case cm_arith: | |
171 | { | |
172 | register ARITH_COM *c; | |
173 | ||
174 | c = command->value.Arith; | |
175 | dispose_words (c->exp); | |
176 | free (c); | |
177 | break; | |
178 | } | |
179 | #endif /* DPAREN_ARITHMETIC */ | |
180 | ||
181 | #if defined (COND_COMMAND) | |
182 | case cm_cond: | |
183 | { | |
184 | register COND_COM *c; | |
185 | ||
186 | c = command->value.Cond; | |
187 | dispose_cond_node (c); | |
188 | break; | |
189 | } | |
190 | #endif /* COND_COMMAND */ | |
191 | ||
192 | case cm_function_def: | |
193 | { | |
194 | register FUNCTION_DEF *c; | |
195 | ||
196 | c = command->value.Function_def; | |
197 | dispose_function_def (c); | |
198 | break; | |
199 | } | |
200 | ||
201 | default: | |
202 | command_error ("dispose_command", CMDERR_BADTYPE, command->type, 0); | |
203 | break; | |
204 | } | |
205 | free (command); | |
206 | } | |
207 | ||
208 | #if defined (COND_COMMAND) | |
209 | /* How to free a node in a conditional command. */ | |
210 | void | |
211 | dispose_cond_node (cond) | |
212 | COND_COM *cond; | |
213 | { | |
214 | if (cond) | |
215 | { | |
216 | if (cond->left) | |
217 | dispose_cond_node (cond->left); | |
218 | if (cond->right) | |
219 | dispose_cond_node (cond->right); | |
220 | if (cond->op) | |
221 | dispose_word (cond->op); | |
222 | free (cond); | |
223 | } | |
224 | } | |
225 | #endif /* COND_COMMAND */ | |
226 | ||
227 | void | |
228 | dispose_function_def_contents (c) | |
229 | FUNCTION_DEF *c; | |
230 | { | |
231 | dispose_word (c->name); | |
232 | dispose_command (c->command); | |
233 | FREE (c->source_file); | |
234 | } | |
235 | ||
236 | void | |
237 | dispose_function_def (c) | |
238 | FUNCTION_DEF *c; | |
239 | { | |
240 | dispose_function_def_contents (c); | |
241 | free (c); | |
242 | } | |
243 | ||
244 | /* How to free a WORD_DESC. */ | |
245 | void | |
246 | dispose_word (w) | |
247 | WORD_DESC *w; | |
248 | { | |
249 | FREE (w->word); | |
250 | ocache_free (wdcache, WORD_DESC, w); | |
251 | } | |
252 | ||
253 | /* Free a WORD_DESC, but not the word contained within. */ | |
254 | void | |
255 | dispose_word_desc (w) | |
256 | WORD_DESC *w; | |
257 | { | |
258 | w->word = 0; | |
259 | ocache_free (wdcache, WORD_DESC, w); | |
260 | } | |
261 | ||
262 | /* How to get rid of a linked list of words. A WORD_LIST. */ | |
263 | void | |
264 | dispose_words (list) | |
265 | WORD_LIST *list; | |
266 | { | |
267 | WORD_LIST *t; | |
268 | ||
269 | while (list) | |
270 | { | |
271 | t = list; | |
272 | list = list->next; | |
273 | dispose_word (t->word); | |
274 | #if 0 | |
275 | free (t); | |
276 | #else | |
277 | ocache_free (wlcache, WORD_LIST, t); | |
278 | #endif | |
279 | } | |
280 | } | |
281 | ||
282 | #ifdef INCLUDE_UNUSED | |
283 | /* How to dispose of an array of pointers to char. This is identical to | |
284 | free_array in stringlib.c. */ | |
285 | void | |
286 | dispose_word_array (array) | |
287 | char **array; | |
288 | { | |
289 | register int count; | |
290 | ||
291 | if (array == 0) | |
292 | return; | |
293 | ||
294 | for (count = 0; array[count]; count++) | |
295 | free (array[count]); | |
296 | ||
297 | free (array); | |
298 | } | |
299 | #endif | |
300 | ||
301 | /* How to dispose of an list of redirections. A REDIRECT. */ | |
302 | void | |
303 | dispose_redirects (list) | |
304 | REDIRECT *list; | |
305 | { | |
306 | register REDIRECT *t; | |
307 | ||
308 | while (list) | |
309 | { | |
310 | t = list; | |
311 | list = list->next; | |
312 | ||
313 | if (t->rflags & REDIR_VARASSIGN) | |
314 | dispose_word (t->redirector.filename); | |
315 | ||
316 | switch (t->instruction) | |
317 | { | |
318 | case r_reading_until: | |
319 | case r_deblank_reading_until: | |
320 | free (t->here_doc_eof); | |
321 | /*FALLTHROUGH*/ | |
322 | case r_reading_string: | |
323 | case r_output_direction: | |
324 | case r_input_direction: | |
325 | case r_inputa_direction: | |
326 | case r_appending_to: | |
327 | case r_err_and_out: | |
328 | case r_append_err_and_out: | |
329 | case r_input_output: | |
330 | case r_output_force: | |
331 | case r_duplicating_input_word: | |
332 | case r_duplicating_output_word: | |
333 | case r_move_input_word: | |
334 | case r_move_output_word: | |
335 | dispose_word (t->redirectee.filename); | |
336 | /* FALLTHROUGH */ | |
337 | default: | |
338 | break; | |
339 | } | |
340 | free (t); | |
341 | } | |
342 | } |