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726f6388 JA |
1 | /* dispose_command.c -- dispose of a COMMAND structure. */ |
2 | ||
3 | /* Copyright (C) 1987,1991 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 it | |
8 | under the terms of the GNU General Public License as published by | |
bb70624e | 9 | the Free Software Foundation; either version 2, or (at your option) |
726f6388 JA |
10 | any later version. |
11 | ||
12 | Bash is distributed in the hope that it will be useful, but WITHOUT | |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with Bash; see the file COPYING. If not, write to the Free | |
bb70624e | 19 | Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 | 20 | |
ccc6cda3 JA |
21 | #include "config.h" |
22 | ||
cce855bc JA |
23 | #include "bashtypes.h" |
24 | ||
ccc6cda3 JA |
25 | #if defined (HAVE_UNISTD_H) |
26 | # include <unistd.h> | |
27 | #endif | |
28 | ||
29 | #include "bashansi.h" | |
726f6388 JA |
30 | #include "shell.h" |
31 | ||
32 | /* Dispose of the command structure passed. */ | |
33 | void | |
34 | dispose_command (command) | |
35 | COMMAND *command; | |
36 | { | |
ccc6cda3 JA |
37 | if (command == 0) |
38 | return; | |
726f6388 JA |
39 | |
40 | if (command->redirects) | |
41 | dispose_redirects (command->redirects); | |
42 | ||
43 | switch (command->type) | |
44 | { | |
45 | case cm_for: | |
726f6388 JA |
46 | #if defined (SELECT_COMMAND) |
47 | case cm_select: | |
ccc6cda3 | 48 | #endif |
726f6388 | 49 | { |
ccc6cda3 JA |
50 | register FOR_COM *c; |
51 | #if defined (SELECT_COMMAND) | |
52 | if (command->type == cm_select) | |
53 | c = (FOR_COM *)command->value.Select; | |
54 | else | |
55 | #endif | |
56 | c = command->value.For; | |
726f6388 JA |
57 | dispose_word (c->name); |
58 | dispose_words (c->map_list); | |
59 | dispose_command (c->action); | |
60 | free (c); | |
61 | break; | |
62 | } | |
ccc6cda3 | 63 | |
bb70624e JA |
64 | #if defined (ARITH_FOR_COMMAND) |
65 | case cm_arith_for: | |
66 | { | |
67 | register ARITH_FOR_COM *c; | |
68 | ||
69 | c = command->value.ArithFor; | |
70 | dispose_words (c->init); | |
71 | dispose_words (c->test); | |
72 | dispose_words (c->step); | |
73 | dispose_command (c->action); | |
74 | free (c); | |
75 | break; | |
76 | } | |
77 | #endif /* ARITH_FOR_COMMAND */ | |
78 | ||
726f6388 JA |
79 | case cm_group: |
80 | { | |
81 | dispose_command (command->value.Group->command); | |
82 | free (command->value.Group); | |
83 | break; | |
84 | } | |
85 | ||
bb70624e JA |
86 | case cm_subshell: |
87 | { | |
88 | dispose_command (command->value.Subshell->command); | |
89 | free (command->value.Subshell); | |
90 | break; | |
91 | } | |
92 | ||
726f6388 JA |
93 | case cm_case: |
94 | { | |
ccc6cda3 JA |
95 | register CASE_COM *c; |
96 | PATTERN_LIST *t, *p; | |
726f6388 | 97 | |
ccc6cda3 | 98 | c = command->value.Case; |
726f6388 JA |
99 | dispose_word (c->word); |
100 | ||
ccc6cda3 | 101 | for (p = c->clauses; p; ) |
726f6388 JA |
102 | { |
103 | dispose_words (p->patterns); | |
104 | dispose_command (p->action); | |
105 | t = p; | |
106 | p = p->next; | |
107 | free (t); | |
108 | } | |
109 | free (c); | |
110 | break; | |
111 | } | |
112 | ||
113 | case cm_until: | |
114 | case cm_while: | |
115 | { | |
ccc6cda3 | 116 | register WHILE_COM *c; |
726f6388 | 117 | |
ccc6cda3 | 118 | c = command->value.While; |
726f6388 JA |
119 | dispose_command (c->test); |
120 | dispose_command (c->action); | |
121 | free (c); | |
122 | break; | |
123 | } | |
124 | ||
125 | case cm_if: | |
126 | { | |
ccc6cda3 JA |
127 | register IF_COM *c; |
128 | ||
129 | c = command->value.If; | |
726f6388 JA |
130 | dispose_command (c->test); |
131 | dispose_command (c->true_case); | |
132 | dispose_command (c->false_case); | |
133 | free (c); | |
134 | break; | |
135 | } | |
136 | ||
137 | case cm_simple: | |
138 | { | |
ccc6cda3 JA |
139 | register SIMPLE_COM *c; |
140 | ||
141 | c = command->value.Simple; | |
726f6388 JA |
142 | dispose_words (c->words); |
143 | dispose_redirects (c->redirects); | |
144 | free (c); | |
145 | break; | |
146 | } | |
147 | ||
148 | case cm_connection: | |
149 | { | |
ccc6cda3 JA |
150 | register CONNECTION *c; |
151 | ||
152 | c = command->value.Connection; | |
726f6388 JA |
153 | dispose_command (c->first); |
154 | dispose_command (c->second); | |
155 | free (c); | |
156 | break; | |
157 | } | |
158 | ||
cce855bc JA |
159 | #if defined (DPAREN_ARITHMETIC) |
160 | case cm_arith: | |
161 | { | |
162 | register ARITH_COM *c; | |
163 | ||
164 | c = command->value.Arith; | |
165 | dispose_words (c->exp); | |
166 | free (c); | |
167 | break; | |
168 | } | |
169 | #endif /* DPAREN_ARITHMETIC */ | |
170 | ||
171 | #if defined (COND_COMMAND) | |
172 | case cm_cond: | |
173 | { | |
174 | register COND_COM *c; | |
175 | ||
176 | c = command->value.Cond; | |
177 | dispose_cond_node (c); | |
178 | break; | |
179 | } | |
180 | #endif /* COND_COMMAND */ | |
181 | ||
726f6388 JA |
182 | case cm_function_def: |
183 | { | |
ccc6cda3 JA |
184 | register FUNCTION_DEF *c; |
185 | ||
186 | c = command->value.Function_def; | |
726f6388 JA |
187 | dispose_word (c->name); |
188 | dispose_command (c->command); | |
189 | free (c); | |
190 | break; | |
191 | } | |
192 | ||
193 | default: | |
b72432fd | 194 | command_error ("dispose_command", CMDERR_BADTYPE, command->type, 0); |
726f6388 JA |
195 | break; |
196 | } | |
197 | free (command); | |
198 | } | |
199 | ||
cce855bc JA |
200 | #if defined (COND_COMMAND) |
201 | /* How to free a node in a conditional command. */ | |
202 | void | |
203 | dispose_cond_node (cond) | |
204 | COND_COM *cond; | |
205 | { | |
206 | if (cond) | |
207 | { | |
208 | if (cond->left) | |
209 | dispose_cond_node (cond->left); | |
210 | if (cond->right) | |
211 | dispose_cond_node (cond->right); | |
212 | if (cond->op) | |
213 | dispose_word (cond->op); | |
214 | free (cond); | |
215 | } | |
216 | } | |
217 | #endif /* COND_COMMAND */ | |
218 | ||
726f6388 JA |
219 | /* How to free a WORD_DESC. */ |
220 | void | |
cce855bc JA |
221 | dispose_word (w) |
222 | WORD_DESC *w; | |
726f6388 | 223 | { |
cce855bc JA |
224 | FREE (w->word); |
225 | free (w); | |
726f6388 JA |
226 | } |
227 | ||
228 | /* How to get rid of a linked list of words. A WORD_LIST. */ | |
229 | void | |
230 | dispose_words (list) | |
231 | WORD_LIST *list; | |
232 | { | |
233 | WORD_LIST *t; | |
ccc6cda3 | 234 | |
726f6388 JA |
235 | while (list) |
236 | { | |
237 | t = list; | |
238 | list = list->next; | |
239 | dispose_word (t->word); | |
240 | free (t); | |
241 | } | |
242 | } | |
243 | ||
d166f048 JA |
244 | #ifdef INCLUDE_UNUSED |
245 | /* How to dispose of an array of pointers to char. This is identical to | |
246 | free_array in stringlib.c. */ | |
726f6388 JA |
247 | void |
248 | dispose_word_array (array) | |
249 | char **array; | |
250 | { | |
251 | register int count; | |
252 | ||
d166f048 JA |
253 | if (array == 0) |
254 | return; | |
255 | ||
726f6388 JA |
256 | for (count = 0; array[count]; count++) |
257 | free (array[count]); | |
258 | ||
259 | free (array); | |
260 | } | |
d166f048 | 261 | #endif |
726f6388 JA |
262 | |
263 | /* How to dispose of an list of redirections. A REDIRECT. */ | |
264 | void | |
265 | dispose_redirects (list) | |
266 | REDIRECT *list; | |
267 | { | |
268 | register REDIRECT *t; | |
269 | ||
270 | while (list) | |
271 | { | |
272 | t = list; | |
273 | list = list->next; | |
274 | switch (t->instruction) | |
275 | { | |
276 | case r_reading_until: | |
277 | case r_deblank_reading_until: | |
278 | free (t->here_doc_eof); | |
ccc6cda3 | 279 | /*FALLTHROUGH*/ |
726f6388 JA |
280 | case r_output_direction: |
281 | case r_input_direction: | |
282 | case r_inputa_direction: | |
283 | case r_appending_to: | |
284 | case r_err_and_out: | |
285 | case r_input_output: | |
286 | case r_output_force: | |
287 | case r_duplicating_input_word: | |
288 | case r_duplicating_output_word: | |
289 | dispose_word (t->redirectee.filename); | |
ccc6cda3 JA |
290 | /* FALLTHROUGH */ |
291 | default: | |
726f6388 JA |
292 | break; |
293 | } | |
294 | free (t); | |
295 | } | |
296 | } |