builtins/eval.def

   1 This file is eval.def, from which is created eval.c.
   2 It implements the builtin "eval" in Bash.
   3
   4 Copyright (C) 1987-2016 Free Software Foundation, Inc.
   5
   6 This file is part of GNU Bash, the Bourne Again SHell.
   7
   8 Bash is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 Bash is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 $PRODUCES eval.c
  22
  23 $BUILTIN eval
  24 $FUNCTION eval_builtin
  25 $SHORT_DOC eval [arg ...]
  26 Execute arguments as a shell command.
  27
  28 Combine ARGs into a single string, use the result as input to the shell,
  29 and execute the resulting commands.
  30
  31 Exit Status:
  32 Returns exit status of command or success if command is null.
  33 $END
  34
  35 #include <config.h>
  36 #if defined (HAVE_UNISTD_H)
  37 #  ifdef _MINIX
  38 #    include <sys/types.h>
  39 #  endif
  40 #  include <unistd.h>
  41 #endif
  42
  43 #include "../shell.h"
  44 #include "bashgetopt.h"
  45 #include "common.h"
  46
  47 /* Parse the string that these words make, and execute the command found. */
  48 int
  49 eval_builtin (list)
  50      WORD_LIST *list;
  51 {
  52   if (no_options (list))
  53     return (EX_USAGE);
  54   list = loptend;       /* skip over possible `--' */
  55
  56   return (list ? evalstring (string_list (list), "eval", SEVAL_NOHIST) : EXECUTION_SUCCESS);
  57 }