return.def   [plain text]

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

Copyright (C) 1987-2003 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
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version.

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FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

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with Bash; see the file COPYING.  If not, write to the Free Software
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$PRODUCES return.c

$BUILTIN return

$FUNCTION return_builtin
$SHORT_DOC return [n]
Causes a function to exit with the return value specified by N.  If N
is omitted, the return status is that of the last command.
$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"

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;
{
  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);
    }
}