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-rw-r--r--dispose_cmd.c342
1 files changed, 342 insertions, 0 deletions
diff --git a/dispose_cmd.c b/dispose_cmd.c
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+/* 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);
+ }
+}
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