summaryrefslogtreecommitdiff
path: root/dispose_cmd.c
blob: c624605b5080a5ee144fe2747d72b7a3f5a59139 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
/* dispose_command.c -- dispose of a COMMAND structure. */

/* Copyright (C) 1987-2009 Free Software Foundation, Inc.

   This file is part of GNU Bash, the Bourne Again SHell.

   Bash is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Bash is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "config.h"

#include "bashtypes.h"

#if defined (HAVE_UNISTD_H)
#  include <unistd.h>
#endif

#include "bashansi.h"
#include "shell.h"

extern sh_obj_cache_t wdcache, wlcache;

/* Dispose of the command structure passed. */
void
dispose_command (command)
     COMMAND *command;
{
  if (command == 0)
    return;

  if (command->redirects)
    dispose_redirects (command->redirects);

  switch (command->type)
    {
    case cm_for:
#if defined (SELECT_COMMAND)
    case cm_select:
#endif
      {
	register FOR_COM *c;
#if defined (SELECT_COMMAND)
	if (command->type == cm_select)
	  c = (FOR_COM *)command->value.Select;
	else
#endif
	c = command->value.For;
	dispose_word (c->name);
	dispose_words (c->map_list);
	dispose_command (c->action);
	free (c);
	break;
      }

#if defined (ARITH_FOR_COMMAND)
    case cm_arith_for:
      {
	register ARITH_FOR_COM *c;

	c = command->value.ArithFor;
	dispose_words (c->init);
	dispose_words (c->test);
	dispose_words (c->step);
	dispose_command (c->action);
	free (c);
	break;
      }
#endif /* ARITH_FOR_COMMAND */

    case cm_group:
      {
	dispose_command (command->value.Group->command);
	free (command->value.Group);
	break;
      }

    case cm_subshell:
      {
	dispose_command (command->value.Subshell->command);
	free (command->value.Subshell);
	break;
      }

    case cm_coproc:
      {
	free (command->value.Coproc->name);
	dispose_command (command->value.Coproc->command);
	free (command->value.Coproc);
	break;
      }

    case cm_case:
      {
	register CASE_COM *c;
	PATTERN_LIST *t, *p;

	c = command->value.Case;
	dispose_word (c->word);

	for (p = c->clauses; p; )
	  {
	    dispose_words (p->patterns);
	    dispose_command (p->action);
	    t = p;
	    p = p->next;
	    free (t);
	  }
	free (c);
	break;
      }

    case cm_until:
    case cm_while:
      {
	register WHILE_COM *c;

	c = command->value.While;
	dispose_command (c->test);
	dispose_command (c->action);
	free (c);
	break;
      }

    case cm_if:
      {
	register IF_COM *c;

	c = command->value.If;
	dispose_command (c->test);
	dispose_command (c->true_case);
	dispose_command (c->false_case);
	free (c);
	break;
      }

    case cm_simple:
      {
	register SIMPLE_COM *c;

	c = command->value.Simple;
	dispose_words (c->words);
	dispose_redirects (c->redirects);
	free (c);
	break;
      }

    case cm_connection:
      {
	register CONNECTION *c;

	c = command->value.Connection;
	dispose_command (c->first);
	dispose_command (c->second);
	free (c);
	break;
      }

#if defined (DPAREN_ARITHMETIC)
    case cm_arith:
      {
	register ARITH_COM *c;

	c = command->value.Arith;
	dispose_words (c->exp);
	free (c);
	break;
      }
#endif /* DPAREN_ARITHMETIC */

#if defined (COND_COMMAND)
    case cm_cond:
      {
	register COND_COM *c;

	c = command->value.Cond;
	dispose_cond_node (c);
	break;
      }
#endif /* COND_COMMAND */

    case cm_function_def:
      {
	register FUNCTION_DEF *c;

	c = command->value.Function_def;
	dispose_function_def (c);
	break;
      }

    default:
      command_error ("dispose_command", CMDERR_BADTYPE, command->type, 0);
      break;
    }
  free (command);
}

#if defined (COND_COMMAND)
/* How to free a node in a conditional command. */
void
dispose_cond_node (cond)
     COND_COM *cond;
{
  if (cond)
    {
      if (cond->left)
	dispose_cond_node (cond->left);
      if (cond->right)
	dispose_cond_node (cond->right);
      if (cond->op)
	dispose_word (cond->op);
      free (cond);
    }
}
#endif /* COND_COMMAND */

void
dispose_function_def_contents (c)
     FUNCTION_DEF *c;
{
  dispose_word (c->name);
  dispose_command (c->command);
  FREE (c->source_file);
}

void
dispose_function_def (c)
     FUNCTION_DEF *c;
{
  dispose_function_def_contents (c);
  free (c);
}

/* How to free a WORD_DESC. */
void
dispose_word (w)
     WORD_DESC *w;
{
  FREE (w->word);
  ocache_free (wdcache, WORD_DESC, w);
}

/* Free a WORD_DESC, but not the word contained within. */
void
dispose_word_desc (w)
     WORD_DESC *w;
{
  w->word = 0;
  ocache_free (wdcache, WORD_DESC, w);
}

/* How to get rid of a linked list of words.  A WORD_LIST. */
void
dispose_words (list)
     WORD_LIST *list;
{
  WORD_LIST *t;

  while (list)
    {
      t = list;
      list = list->next;
      dispose_word (t->word);
#if 0
      free (t);
#else
      ocache_free (wlcache, WORD_LIST, t);
#endif
    }
}

#ifdef INCLUDE_UNUSED
/* How to dispose of an array of pointers to char.  This is identical to
   free_array in stringlib.c. */
void
dispose_word_array (array)
     char **array;
{
  register int count;

  if (array == 0)
    return;

  for (count = 0; array[count]; count++)
    free (array[count]);

  free (array);
}
#endif

/* How to dispose of an list of redirections.  A REDIRECT. */
void
dispose_redirects (list)
     REDIRECT *list;
{
  register REDIRECT *t;

  while (list)
    {
      t = list;
      list = list->next;

      if (t->rflags & REDIR_VARASSIGN)
	dispose_word (t->redirector.filename);

      switch (t->instruction)
	{
	case r_reading_until:
	case r_deblank_reading_until:
	  free (t->here_doc_eof);
	/*FALLTHROUGH*/
	case r_reading_string:
	case r_output_direction:
	case r_input_direction:
	case r_inputa_direction:
	case r_appending_to:
	case r_err_and_out:
	case r_append_err_and_out:
	case r_input_output:
	case r_output_force:
	case r_duplicating_input_word:
	case r_duplicating_output_word:
	case r_move_input_word:
	case r_move_output_word:
	  dispose_word (t->redirectee.filename);
	  /* FALLTHROUGH */
	default:
	  break;
	}
      free (t);
    }
}