/* read.c - Command to read variables from user.  */
/*
 *  VasEBoot  --  GRand Unified Bootloader
 *  Copyright (C) 2006,2007,2008  Free Software Foundation, Inc.
 *
 *  VasEBoot 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 Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  VasEBoot is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with VasEBoot.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <VasEBoot/dl.h>
#include <VasEBoot/misc.h>
#include <VasEBoot/mm.h>
#include <VasEBoot/env.h>
#include <VasEBoot/term.h>
#include <VasEBoot/types.h>
#include <VasEBoot/command.h>
#include <VasEBoot/i18n.h>

VasEBoot_MOD_LICENSE ("GPLv3+");

static char *
VasEBoot_getline (void)
{
  int i;
  char *line;
  char *tmp;
  char c;

  i = 0;
  line = VasEBoot_malloc (1 + i + sizeof('\0'));
  if (! line)
    return NULL;

  while (1)
    {
      c = VasEBoot_getkey ();
      if ((c == '\n') || (c == '\r'))
	break;

      line[i] = c;
      if (VasEBoot_isprint (c))
	VasEBoot_printf ("%c", c);
      i++;
      tmp = VasEBoot_realloc (line, 1 + i + sizeof('\0'));
      if (! tmp)
	{
	  VasEBoot_free (line);
	  return NULL;
	}
      line = tmp;
    }
  line[i] = '\0';

  return line;
}

static VasEBoot_err_t
VasEBoot_cmd_read (VasEBoot_command_t cmd __attribute__ ((unused)), int argc, char **args)
{
  char *line = VasEBoot_getline ();
  if (! line)
    return VasEBoot_errno;
  if (argc > 0)
    VasEBoot_env_set (args[0], line);

  VasEBoot_free (line);
  return 0;
}

static VasEBoot_command_t cmd;

VasEBoot_MOD_INIT(read)
{
  cmd = VasEBoot_register_command ("read", VasEBoot_cmd_read,
			       N_("[ENVVAR]"),
			       N_("Set variable with user input."));
}

VasEBoot_MOD_FINI(read)
{
  VasEBoot_unregister_command (cmd);
}