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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2006,2007,2008,2009,2010,2011,2012,2013 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 <config-util.h>
#include <config.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <error.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#include <grub/types.h>
#include <grub/util/misc.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/emu/misc.h>
#include <grub/emu/hostdisk.h>
#include <grub/emu/getroot.h>
#include <sys/wait.h>
#include <hurd.h>
#include <hurd/lookup.h>
#include <hurd/fs.h>
#include <sys/mman.h>
static char *
grub_util_find_hurd_root_device (const char *path)
{
file_t file;
error_t err;
char *argz = NULL, *name = NULL, *ret;
size_t argz_len = 0;
int i;
file = file_name_lookup (path, 0, 0);
if (file == MACH_PORT_NULL)
/* TRANSLATORS: The first %s is the file being looked at, the second %s is
the error message. */
grub_util_error (_("cannot open `%s': %s"), path, strerror (errno));
/* This returns catenated 0-terminated strings. */
err = file_get_fs_options (file, &argz, &argz_len);
if (err)
/* TRANSLATORS: On GNU/Hurd, a "translator" is similar to a filesystem
mount, but handled by a userland daemon, whose invocation command line
is being fetched here. First %s is the file being looked at (for which
we are fetching the "translator" command line), second %s is the error
message.
*/
grub_util_error (_("cannot get translator command line "
"for path `%s': %s"), path, strerror(err));
if (argz_len == 0)
grub_util_error (_("translator command line is empty for path `%s'"), path);
/* Make sure the string is terminated. */
argz[argz_len-1] = 0;
/* Skip first word (translator path) and options. */
for (i = strlen (argz) + 1; i < argz_len; i += strlen (argz + i) + 1)
{
if (argz[i] != '-')
{
/* Non-option. Only accept one, assumed to be the FS path. */
/* XXX: this should be replaced by an RPC to the translator. */
if (name)
/* TRANSLATORS: we expect to get something like
/hurd/foobar --option1 --option2=baz /dev/something
*/
grub_util_error (_("translator `%s' for path `%s' has several "
"non-option words, at least `%s' and `%s'"),
argz, path, name, argz + i);
name = argz + i;
}
}
if (!name)
/* TRANSLATORS: we expect to get something like
/hurd/foobar --option1 --option2=baz /dev/something
*/
grub_util_error (_("translator `%s' for path `%s' is given only options, "
"cannot find device part"), argz, path);
if (strncmp (name, "device:", sizeof ("device:") - 1) == 0)
{
char *dev_name = name + sizeof ("device:") - 1;
size_t size = sizeof ("/dev/") - 1 + strlen (dev_name) + 1;
char *next;
ret = malloc (size);
next = stpncpy (ret, "/dev/", size);
stpncpy (next, dev_name, size - (next - ret));
}
else if (!strncmp (name, "file:", sizeof ("file:") - 1))
ret = strdup (name + sizeof ("file:") - 1);
else
ret = strdup (name);
munmap (argz, argz_len);
return ret;
}
static int
is_fulldisk (const char *child, const char *parent)
{
if (strcmp (parent, child) == 0)
return 1;
if (strncmp (parent, "/dev/", sizeof ("/dev/") - 1) == 0
&& child[0] !=0 && strcmp (parent + sizeof ("/dev/") - 1, child) == 0)
return 1;
if (strncmp (child, "/dev/", sizeof ("/dev/") - 1) == 0
&& parent[0] != 0 && strcmp (child + sizeof ("/dev/") - 1, parent) == 0)
return 1;
return 0;
}
char *
grub_util_part_to_disk (const char *os_dev,
struct stat *st,
int *is_part)
{
char *path;
grub_disk_addr_t offset;
char *p;
if (! S_ISBLK (st->st_mode))
{
*is_part = 0;
return xstrdup (os_dev);
}
if (!grub_util_hurd_get_disk_info (os_dev, NULL, &offset, NULL, &path))
return xstrdup (os_dev);
/* Some versions of Hurd use badly glued Linux code to handle partitions
resulting in partitions being promoted to disks. */
if (path && !(offset == 0 && is_fulldisk (path, os_dev)
&& (strncmp ("/dev/sd", os_dev, 7) == 0
|| strncmp ("/dev/hd", os_dev, 7) == 0)))
{
*is_part = !is_fulldisk (path, os_dev);
if (path[0] != '/')
{
char *n = xasprintf ("/dev/%s", path);
free (path);
path = n;
}
return path;
}
free (path);
path = xstrdup (os_dev);
p = strchr (path + 7, 's');
if (p)
{
*is_part = 1;
*p = '\0';
}
return path;
}
enum grub_dev_abstraction_types
grub_util_get_dev_abstraction_os (const char *os_dev __attribute__((unused)))
{
return GRUB_DEV_ABSTRACTION_NONE;
}
int
grub_util_pull_device_os (const char *os_dev __attribute__ ((unused)),
enum grub_dev_abstraction_types ab __attribute__ ((unused)))
{
return 0;
}
char *
grub_util_get_grub_dev_os (const char *os_dev __attribute__ ((unused)))
{
return NULL;
}
grub_disk_addr_t
grub_util_find_partition_start_os (const char *dev)
{
grub_uint32_t secsize;
grub_disk_addr_t offset;
char *path;
if (!grub_util_hurd_get_disk_info (dev, &secsize, &offset, NULL, &path))
return 0;
if (path && !(offset == 0 && is_fulldisk (path, dev)
&& (strncmp ("/dev/sd", dev, 7) == 0
|| strncmp ("/dev/hd", dev, 7) == 0)))
{
free (path);
return (secsize / 512) * offset;
}
free (path);
return -1;
}
char **
grub_guess_root_devices (const char *dir)
{
char **os_dev = NULL;
os_dev = xmalloc (2 * sizeof (os_dev[0]));
/* GNU/Hurd specific function. */
os_dev[0] = grub_util_find_hurd_root_device (dir);
if (!os_dev[0])
{
free (os_dev);
return 0;
}
os_dev[1] = 0;
return os_dev;
}
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