arch/all-pc/boot/grub2-aros/grub-core/kern/rescue_parser.c

   1 /* rescue_parser.c - rescue mode parser  */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2009  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/types.h>
  21 #include <grub/mm.h>
  22 #include <grub/env.h>
  23 #include <grub/parser.h>
  24 #include <grub/misc.h>
  25 #include <grub/command.h>
  26 #include <grub/i18n.h>
  27
  28 grub_err_t
  29 grub_rescue_parse_line (char *line, grub_reader_getline_t getline)
  30 {
  31   char *name;
  32   int n;
  33   grub_command_t cmd;
  34   char **args;
  35
  36   if (grub_parser_split_cmdline (line, getline, &n, &args) || n < 0)
  37     return grub_errno;
  38
  39   if (n == 0)
  40     return GRUB_ERR_NONE;
  41
  42   /* In case of an assignment set the environment accordingly
  43      instead of calling a function.  */
  44   if (n == 1 && grub_strchr (line, '='))
  45     {
  46       char *val = grub_strchr (args[0], '=');
  47       val[0] = 0;
  48       grub_env_set (args[0], val + 1);
  49       val[0] = '=';
  50       goto quit;
  51     }
  52
  53   /* Get the command name.  */
  54   name = args[0];
  55
  56   /* If nothing is specified, restart.  */
  57   if (*name == '\0')
  58     goto quit;
  59
  60   cmd = grub_command_find (name);
  61   if (cmd)
  62     {
  63       (cmd->func) (cmd, n - 1, &args[1]);
  64     }
  65   else
  66     {
  67       grub_printf_ (N_("Unknown command `%s'.\n"), name);
  68       if (grub_command_find ("help"))
  69         grub_printf ("Try `help' for usage\n");
  70     }
  71
  72  quit:
  73   grub_free (args[0]);
  74   grub_free (args);
  75
  76   return grub_errno;
  77 }