/* 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 .
*/
#include "config.h"
#include "bashtypes.h"
#if defined (HAVE_UNISTD_H)
# include
#endif
#include
#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;
for (new_list = (WORD_LIST *)NULL; list; list = list->next)
new_list = make_word_list (copy_word (list->word), new_list);
return (REVERSE_LIST (new_list, WORD_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;
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);
}