arch/all-pc/boot/grub2-aros/grub-core/commands/eval.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/dl.h>
  20 #include <grub/misc.h>
  21 #include <grub/script_sh.h>
  22 #include <grub/command.h>
  23 #include <grub/i18n.h>
  24 #include <grub/term.h>
  25
  26 GRUB_MOD_LICENSE ("GPLv3+");
  27
  28 static grub_err_t
  29 grub_cmd_eval (grub_command_t cmd __attribute__((__unused__)),
  30                int argc, char *argv[])
  31 {
  32   int i;
  33   grub_size_t size = argc; /* +1 for final zero */
  34   char *str, *p;
  35   grub_err_t ret;
  36
  37   if (argc == 0)
  38     return GRUB_ERR_NONE;
  39
  40   for (i = 0; i < argc; i++)
  41     size += grub_strlen (argv[i]);
  42
  43   str = p = grub_malloc (size);
  44   if (!str)
  45     return grub_errno;
  46
  47   for (i = 0; i < argc; i++)
  48     {
  49       p = grub_stpcpy (p, argv[i]);
  50       *p++ = ' ';
  51     }
  52   *--p = '\0';
  53
  54   ret = grub_script_execute_sourcecode (str);
  55   grub_free (str);
  56   return ret;
  57 }
  58
  59 static grub_command_t cmd;
  60
  61 GRUB_MOD_INIT(eval)
  62 {
  63   cmd = grub_register_command ("eval", grub_cmd_eval, N_("STRING ..."),
  64                                 N_("Evaluate arguments as GRUB commands"));
  65 }
  66
  67 GRUB_MOD_FINI(eval)
  68 {
  69   grub_unregister_command (cmd);
  70 }
  71