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-rw-r--r--copy_cmd.c459
1 files changed, 459 insertions, 0 deletions
diff --git a/copy_cmd.c b/copy_cmd.c
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+++ b/copy_cmd.c
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+/* copy_command.c -- copy a COMMAND structure. This is needed
+ primarily for making function definitions, but I'm not sure
+ that anyone else will need it. */
+
+/* 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 <stdio.h>
+
+#include "shell.h"
+
+static PATTERN_LIST *copy_case_clause __P((PATTERN_LIST *));
+static PATTERN_LIST *copy_case_clauses __P((PATTERN_LIST *));
+static FOR_COM *copy_for_command __P((FOR_COM *));
+#if defined (ARITH_FOR_COMMAND)
+static ARITH_FOR_COM *copy_arith_for_command __P((ARITH_FOR_COM *));
+#endif
+static GROUP_COM *copy_group_command __P((GROUP_COM *));
+static SUBSHELL_COM *copy_subshell_command __P((SUBSHELL_COM *));
+static COPROC_COM *copy_coproc_command __P((COPROC_COM *));
+static CASE_COM *copy_case_command __P((CASE_COM *));
+static WHILE_COM *copy_while_command __P((WHILE_COM *));
+static IF_COM *copy_if_command __P((IF_COM *));
+#if defined (DPAREN_ARITHMETIC)
+static ARITH_COM *copy_arith_command __P((ARITH_COM *));
+#endif
+#if defined (COND_COMMAND)
+static COND_COM *copy_cond_command __P((COND_COM *));
+#endif
+static SIMPLE_COM *copy_simple_command __P((SIMPLE_COM *));
+
+WORD_DESC *
+copy_word (w)
+ WORD_DESC *w;
+{
+ WORD_DESC *new_word;
+
+ new_word = make_bare_word (w->word);
+ new_word->flags = w->flags;
+ return (new_word);
+}
+
+/* Copy the chain of words in LIST. Return a pointer to
+ the new chain. */
+WORD_LIST *
+copy_word_list (list)
+ WORD_LIST *list;
+{
+ WORD_LIST *new_list, *tl;
+
+ for (new_list = tl = (WORD_LIST *)NULL; list; list = list->next)
+ {
+ if (new_list == 0)
+ new_list = tl = make_word_list (copy_word (list->word), new_list);
+ else
+ {
+ tl->next = make_word_list (copy_word (list->word), (WORD_LIST *)NULL);
+ tl = tl->next;
+ }
+ }
+
+ return (new_list);
+}
+
+static PATTERN_LIST *
+copy_case_clause (clause)
+ PATTERN_LIST *clause;
+{
+ PATTERN_LIST *new_clause;
+
+ new_clause = (PATTERN_LIST *)xmalloc (sizeof (PATTERN_LIST));
+ new_clause->patterns = copy_word_list (clause->patterns);
+ new_clause->action = copy_command (clause->action);
+ new_clause->flags = clause->flags;
+ return (new_clause);
+}
+
+static PATTERN_LIST *
+copy_case_clauses (clauses)
+ PATTERN_LIST *clauses;
+{
+ PATTERN_LIST *new_list, *new_clause;
+
+ for (new_list = (PATTERN_LIST *)NULL; clauses; clauses = clauses->next)
+ {
+ new_clause = copy_case_clause (clauses);
+ new_clause->next = new_list;
+ new_list = new_clause;
+ }
+ return (REVERSE_LIST (new_list, PATTERN_LIST *));
+}
+
+/* Copy a single redirect. */
+REDIRECT *
+copy_redirect (redirect)
+ REDIRECT *redirect;
+{
+ REDIRECT *new_redirect;
+
+ new_redirect = (REDIRECT *)xmalloc (sizeof (REDIRECT));
+#if 0
+ FASTCOPY ((char *)redirect, (char *)new_redirect, (sizeof (REDIRECT)));
+#else
+ *new_redirect = *redirect; /* let the compiler do the fast structure copy */
+#endif
+
+ if (redirect->rflags & REDIR_VARASSIGN)
+ new_redirect->redirector.filename = copy_word (redirect->redirector.filename);
+
+ switch (redirect->instruction)
+ {
+ case r_reading_until:
+ case r_deblank_reading_until:
+ new_redirect->here_doc_eof = redirect->here_doc_eof ? savestring (redirect->here_doc_eof) : 0;
+ /*FALLTHROUGH*/
+ case r_reading_string:
+ case r_appending_to:
+ case r_output_direction:
+ case r_input_direction:
+ case r_inputa_direction:
+ 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:
+ new_redirect->redirectee.filename = copy_word (redirect->redirectee.filename);
+ break;
+ case r_duplicating_input:
+ case r_duplicating_output:
+ case r_move_input:
+ case r_move_output:
+ case r_close_this:
+ break;
+ }
+ return (new_redirect);
+}
+
+REDIRECT *
+copy_redirects (list)
+ REDIRECT *list;
+{
+ REDIRECT *new_list, *temp;
+
+ for (new_list = (REDIRECT *)NULL; list; list = list->next)
+ {
+ temp = copy_redirect (list);
+ temp->next = new_list;
+ new_list = temp;
+ }
+ return (REVERSE_LIST (new_list, REDIRECT *));
+}
+
+static FOR_COM *
+copy_for_command (com)
+ FOR_COM *com;
+{
+ FOR_COM *new_for;
+
+ new_for = (FOR_COM *)xmalloc (sizeof (FOR_COM));
+ new_for->flags = com->flags;
+ new_for->line = com->line;
+ new_for->name = copy_word (com->name);
+ new_for->map_list = copy_word_list (com->map_list);
+ new_for->action = copy_command (com->action);
+ return (new_for);
+}
+
+#if defined (ARITH_FOR_COMMAND)
+static ARITH_FOR_COM *
+copy_arith_for_command (com)
+ ARITH_FOR_COM *com;
+{
+ ARITH_FOR_COM *new_arith_for;
+
+ new_arith_for = (ARITH_FOR_COM *)xmalloc (sizeof (ARITH_FOR_COM));
+ new_arith_for->flags = com->flags;
+ new_arith_for->line = com->line;
+ new_arith_for->init = copy_word_list (com->init);
+ new_arith_for->test = copy_word_list (com->test);
+ new_arith_for->step = copy_word_list (com->step);
+ new_arith_for->action = copy_command (com->action);
+ return (new_arith_for);
+}
+#endif /* ARITH_FOR_COMMAND */
+
+static GROUP_COM *
+copy_group_command (com)
+ GROUP_COM *com;
+{
+ GROUP_COM *new_group;
+
+ new_group = (GROUP_COM *)xmalloc (sizeof (GROUP_COM));
+ new_group->command = copy_command (com->command);
+ return (new_group);
+}
+
+static SUBSHELL_COM *
+copy_subshell_command (com)
+ SUBSHELL_COM *com;
+{
+ SUBSHELL_COM *new_subshell;
+
+ new_subshell = (SUBSHELL_COM *)xmalloc (sizeof (SUBSHELL_COM));
+ new_subshell->command = copy_command (com->command);
+ new_subshell->flags = com->flags;
+ new_subshell->line = com->line;
+ return (new_subshell);
+}
+
+static COPROC_COM *
+copy_coproc_command (com)
+ COPROC_COM *com;
+{
+ COPROC_COM *new_coproc;
+
+ new_coproc = (COPROC_COM *)xmalloc (sizeof (COPROC_COM));
+ new_coproc->name = savestring (com->name);
+ new_coproc->command = copy_command (com->command);
+ new_coproc->flags = com->flags;
+ return (new_coproc);
+}
+
+static CASE_COM *
+copy_case_command (com)
+ CASE_COM *com;
+{
+ CASE_COM *new_case;
+
+ new_case = (CASE_COM *)xmalloc (sizeof (CASE_COM));
+ new_case->flags = com->flags;
+ new_case->line = com->line;
+ new_case->word = copy_word (com->word);
+ new_case->clauses = copy_case_clauses (com->clauses);
+ return (new_case);
+}
+
+static WHILE_COM *
+copy_while_command (com)
+ WHILE_COM *com;
+{
+ WHILE_COM *new_while;
+
+ new_while = (WHILE_COM *)xmalloc (sizeof (WHILE_COM));
+ new_while->flags = com->flags;
+ new_while->test = copy_command (com->test);
+ new_while->action = copy_command (com->action);
+ return (new_while);
+}
+
+static IF_COM *
+copy_if_command (com)
+ IF_COM *com;
+{
+ IF_COM *new_if;
+
+ new_if = (IF_COM *)xmalloc (sizeof (IF_COM));
+ new_if->flags = com->flags;
+ new_if->test = copy_command (com->test);
+ new_if->true_case = copy_command (com->true_case);
+ new_if->false_case = com->false_case ? copy_command (com->false_case) : com->false_case;
+ return (new_if);
+}
+
+#if defined (DPAREN_ARITHMETIC)
+static ARITH_COM *
+copy_arith_command (com)
+ ARITH_COM *com;
+{
+ ARITH_COM *new_arith;
+
+ new_arith = (ARITH_COM *)xmalloc (sizeof (ARITH_COM));
+ new_arith->flags = com->flags;
+ new_arith->exp = copy_word_list (com->exp);
+ new_arith->line = com->line;
+
+ return (new_arith);
+}
+#endif
+
+#if defined (COND_COMMAND)
+static COND_COM *
+copy_cond_command (com)
+ COND_COM *com;
+{
+ COND_COM *new_cond;
+
+ new_cond = (COND_COM *)xmalloc (sizeof (COND_COM));
+ new_cond->flags = com->flags;
+ new_cond->line = com->line;
+ new_cond->type = com->type;
+ new_cond->op = com->op ? copy_word (com->op) : com->op;
+ new_cond->left = com->left ? copy_cond_command (com->left) : (COND_COM *)NULL;
+ new_cond->right = com->right ? copy_cond_command (com->right) : (COND_COM *)NULL;
+
+ return (new_cond);
+}
+#endif
+
+static SIMPLE_COM *
+copy_simple_command (com)
+ SIMPLE_COM *com;
+{
+ SIMPLE_COM *new_simple;
+
+ new_simple = (SIMPLE_COM *)xmalloc (sizeof (SIMPLE_COM));
+ new_simple->flags = com->flags;
+ new_simple->words = copy_word_list (com->words);
+ new_simple->redirects = com->redirects ? copy_redirects (com->redirects) : (REDIRECT *)NULL;
+ new_simple->line = com->line;
+ return (new_simple);
+}
+
+FUNCTION_DEF *
+copy_function_def_contents (old, new_def)
+ FUNCTION_DEF *old, *new_def;
+{
+ new_def->name = copy_word (old->name);
+ new_def->command = old->command ? copy_command (old->command) : old->command;
+ new_def->flags = old->flags;
+ new_def->line = old->line;
+ new_def->source_file = old->source_file ? savestring (old->source_file) : old->source_file;
+ return (new_def);
+}
+
+FUNCTION_DEF *
+copy_function_def (com)
+ FUNCTION_DEF *com;
+{
+ FUNCTION_DEF *new_def;
+
+ new_def = (FUNCTION_DEF *)xmalloc (sizeof (FUNCTION_DEF));
+ new_def = copy_function_def_contents (com, new_def);
+ return (new_def);
+}
+
+/* Copy the command structure in COMMAND. Return a pointer to the
+ copy. Don't you forget to dispose_command () on this pointer
+ later! */
+COMMAND *
+copy_command (command)
+ COMMAND *command;
+{
+ COMMAND *new_command;
+
+ if (command == NULL)
+ return (command);
+
+ new_command = (COMMAND *)xmalloc (sizeof (COMMAND));
+ FASTCOPY ((char *)command, (char *)new_command, sizeof (COMMAND));
+ new_command->flags = command->flags;
+ new_command->line = command->line;
+
+ if (command->redirects)
+ new_command->redirects = copy_redirects (command->redirects);
+
+ switch (command->type)
+ {
+ case cm_for:
+ new_command->value.For = copy_for_command (command->value.For);
+ break;
+
+#if defined (ARITH_FOR_COMMAND)
+ case cm_arith_for:
+ new_command->value.ArithFor = copy_arith_for_command (command->value.ArithFor);
+ break;
+#endif
+
+#if defined (SELECT_COMMAND)
+ case cm_select:
+ new_command->value.Select =
+ (SELECT_COM *)copy_for_command ((FOR_COM *)command->value.Select);
+ break;
+#endif
+
+ case cm_group:
+ new_command->value.Group = copy_group_command (command->value.Group);
+ break;
+
+ case cm_subshell:
+ new_command->value.Subshell = copy_subshell_command (command->value.Subshell);
+ break;
+
+ case cm_coproc:
+ new_command->value.Coproc = copy_coproc_command (command->value.Coproc);
+ break;
+
+ case cm_case:
+ new_command->value.Case = copy_case_command (command->value.Case);
+ break;
+
+ case cm_until:
+ case cm_while:
+ new_command->value.While = copy_while_command (command->value.While);
+ break;
+
+ case cm_if:
+ new_command->value.If = copy_if_command (command->value.If);
+ break;
+
+#if defined (DPAREN_ARITHMETIC)
+ case cm_arith:
+ new_command->value.Arith = copy_arith_command (command->value.Arith);
+ break;
+#endif
+
+#if defined (COND_COMMAND)
+ case cm_cond:
+ new_command->value.Cond = copy_cond_command (command->value.Cond);
+ break;
+#endif
+
+ case cm_simple:
+ new_command->value.Simple = copy_simple_command (command->value.Simple);
+ break;
+
+ case cm_connection:
+ {
+ CONNECTION *new_connection;
+
+ new_connection = (CONNECTION *)xmalloc (sizeof (CONNECTION));
+ new_connection->connector = command->value.Connection->connector;
+ new_connection->first = copy_command (command->value.Connection->first);
+ new_connection->second = copy_command (command->value.Connection->second);
+ new_command->value.Connection = new_connection;
+ break;
+ }
+
+ case cm_function_def:
+ new_command->value.Function_def = copy_function_def (command->value.Function_def);
+ break;
+ }
+ return (new_command);
+}