i-bash/builtins/return.def

This file is return.def, from which is created return.c.
It implements the builtin "return" in Bash.

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/>.

$PRODUCES return.c

$BUILTIN return

$FUNCTION return_builtin
$SHORT_DOC return [n]
Return from a shell function.

Causes a function or sourced script to exit with the return value
specified by N.  If N is omitted, the return status is that of the
last command executed within the function or script.

Exit Status:
Returns N, or failure if the shell is not executing a function or script.
$END

#include <config.h>

#if defined (HAVE_UNISTD_H)
#  ifdef _MINIX
#    include <sys/types.h>
#  endif
#  include <unistd.h>
#endif

#include "../bashintl.h"

#include "../shell.h"
#include "common.h"
#include "bashgetopt.h"

extern int last_command_exit_value;
extern int subshell_environment;
extern int return_catch_flag, return_catch_value;

/* If we are executing a user-defined function then exit with the value
   specified as an argument.  if no argument is given, then the last
   exit status is used. */
int
return_builtin (list)
     WORD_LIST *list;
{
  if (no_options (list))
    return (EX_USAGE);
  list = loptend;	/* skip over possible `--' */

  return_catch_value = get_exitstat (list);

  if (return_catch_flag)
    longjmp (return_catch, 1);
  else
    {
      builtin_error (_("can only `return' from a function or sourced script"));
      return (EXECUTION_FAILURE);
    }
}