174 lines
3.8 KiB
C
174 lines
3.8 KiB
C
/* search.c - search devices based on a file or a filesystem label */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2005,2007,2008,2009 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB 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.
|
|
*
|
|
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <grub/types.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/err.h>
|
|
#include <grub/dl.h>
|
|
#include <grub/device.h>
|
|
#include <grub/file.h>
|
|
#include <grub/env.h>
|
|
#include <grub/command.h>
|
|
#include <grub/search.h>
|
|
#include <grub/i18n.h>
|
|
|
|
void
|
|
FUNC_NAME (const char *key, const char *var, int no_floppy)
|
|
{
|
|
int count = 0;
|
|
grub_fs_autoload_hook_t saved_autoload;
|
|
|
|
auto int iterate_device (const char *name);
|
|
int iterate_device (const char *name)
|
|
{
|
|
int found = 0;
|
|
|
|
/* Skip floppy drives when requested. */
|
|
if (no_floppy &&
|
|
name[0] == 'f' && name[1] == 'd' && name[2] >= '0' && name[2] <= '9')
|
|
return 0;
|
|
|
|
#ifdef DO_SEARCH_FILE
|
|
{
|
|
char *buf;
|
|
grub_file_t file;
|
|
|
|
buf = grub_xasprintf ("(%s)%s", name, key);
|
|
if (! buf)
|
|
return 1;
|
|
|
|
file = grub_file_open (buf);
|
|
if (file)
|
|
{
|
|
found = 1;
|
|
grub_file_close (file);
|
|
}
|
|
grub_free (buf);
|
|
}
|
|
#else
|
|
{
|
|
/* SEARCH_FS_UUID or SEARCH_LABEL */
|
|
grub_device_t dev;
|
|
grub_fs_t fs;
|
|
char *quid;
|
|
|
|
dev = grub_device_open (name);
|
|
if (dev)
|
|
{
|
|
fs = grub_fs_probe (dev);
|
|
|
|
#ifdef DO_SEARCH_FS_UUID
|
|
#define compare_fn grub_strcasecmp
|
|
#define read_fn uuid
|
|
#else
|
|
#define compare_fn grub_strcmp
|
|
#define read_fn label
|
|
#endif
|
|
|
|
if (fs && fs->read_fn)
|
|
{
|
|
fs->read_fn (dev, &quid);
|
|
|
|
if (grub_errno == GRUB_ERR_NONE && quid)
|
|
{
|
|
if (compare_fn (quid, key) == 0)
|
|
found = 1;
|
|
|
|
grub_free (quid);
|
|
}
|
|
}
|
|
|
|
grub_device_close (dev);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (found)
|
|
{
|
|
count++;
|
|
if (var)
|
|
grub_env_set (var, name);
|
|
else
|
|
grub_printf (" %s", name);
|
|
}
|
|
|
|
grub_errno = GRUB_ERR_NONE;
|
|
return (found && var);
|
|
}
|
|
|
|
/* First try without autoloading if we're setting variable. */
|
|
if (var)
|
|
{
|
|
saved_autoload = grub_fs_autoload_hook;
|
|
grub_fs_autoload_hook = 0;
|
|
grub_device_iterate (iterate_device);
|
|
|
|
/* Restore autoload hook. */
|
|
grub_fs_autoload_hook = saved_autoload;
|
|
|
|
/* Retry with autoload if nothing found. */
|
|
if (grub_errno == GRUB_ERR_NONE && count == 0)
|
|
grub_device_iterate (iterate_device);
|
|
}
|
|
else
|
|
grub_device_iterate (iterate_device);
|
|
|
|
if (grub_errno == GRUB_ERR_NONE && count == 0)
|
|
grub_error (GRUB_ERR_FILE_NOT_FOUND, "no such device: %s", key);
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_cmd_do_search (grub_command_t cmd __attribute__ ((unused)), int argc,
|
|
char **args)
|
|
{
|
|
if (argc == 0)
|
|
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no argument specified");
|
|
|
|
FUNC_NAME (args[0], argc == 1 ? 0 : args[1], 0);
|
|
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_command_t cmd;
|
|
|
|
#ifdef DO_SEARCH_FILE
|
|
GRUB_MOD_INIT(search_fs_file)
|
|
#elif defined (DO_SEARCH_FS_UUID)
|
|
GRUB_MOD_INIT(search_fs_uuid)
|
|
#else
|
|
GRUB_MOD_INIT(search_label)
|
|
#endif
|
|
{
|
|
cmd =
|
|
grub_register_command (COMMAND_NAME, grub_cmd_do_search,
|
|
N_("NAME [VARIABLE]"),
|
|
HELP_MESSAGE);
|
|
}
|
|
|
|
#ifdef DO_SEARCH_FILE
|
|
GRUB_MOD_FINI(search_fs_file)
|
|
#elif defined (DO_SEARCH_FS_UUID)
|
|
GRUB_MOD_FINI(search_fs_uuid)
|
|
#else
|
|
GRUB_MOD_FINI(search_label)
|
|
#endif
|
|
{
|
|
grub_unregister_command (cmd);
|
|
}
|