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

   1 /* read.c - Command to read variables from user.  */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2006,2007,2008  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/dl.h>
  21 #include <grub/misc.h>
  22 #include <grub/mm.h>
  23 #include <grub/env.h>
  24 #include <grub/term.h>
  25 #include <grub/types.h>
  26 #include <grub/command.h>
  27 #include <grub/i18n.h>
  28
  29 GRUB_MOD_LICENSE ("GPLv3+");
  30
  31 static char *
  32 grub_getline (void)
  33 {
  34   int i;
  35   char *line;
  36   char *tmp;
  37   char c;
  38
  39   i = 0;
  40   line = grub_malloc (1 + i + sizeof('\0'));
  41   if (! line)
  42     return NULL;
  43
  44   while (1)
  45     {
  46       c = grub_getkey ();
  47       if ((c == '\n') || (c == '\r'))
  48         break;
  49
  50       line[i] = c;
  51       if (grub_isprint (c))
  52         grub_printf ("%c", c);
  53       i++;
  54       tmp = grub_realloc (line, 1 + i + sizeof('\0'));
  55       if (! tmp)
  56         {
  57           grub_free (line);
  58           return NULL;
  59         }
  60       line = tmp;
  61     }
  62   line[i] = '\0';
  63
  64   return line;
  65 }
  66
  67 static grub_err_t
  68 grub_cmd_read (grub_command_t cmd __attribute__ ((unused)), int argc, char **args)
  69 {
  70   char *line = grub_getline ();
  71   if (! line)
  72     return grub_errno;
  73   if (argc > 0)
  74     grub_env_set (args[0], line);
  75
  76   grub_free (line);
  77   return 0;
  78 }
  79
  80 static grub_command_t cmd;
  81 \f
  82 GRUB_MOD_INIT(read)
  83 {
  84   cmd = grub_register_command ("read", grub_cmd_read,
  85                                N_("[ENVVAR]"),
  86                                N_("Set variable with user input."));
  87 }
  88
  89 GRUB_MOD_FINI(read)
  90 {
  91   grub_unregister_command (cmd);
  92 }