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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2006,2007,2008,2009,2010,2011,2012,2013 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 <grub/disk.h>
#include <grub/partition.h>
#include <grub/msdos_partition.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/emu/misc.h>
#include <grub/emu/hostdisk.h>
#include <grub/emu/getroot.h>
#include <grub/misc.h>
#include <grub/i18n.h>
#include <grub/list.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
# include <sys/disk.h> /* DIOCGMEDIASIZE */
# include <sys/param.h>
# include <sys/sysctl.h>
# include <sys/mount.h>
# include <libgeom.h>
grub_int64_t
grub_util_get_fd_size_os (grub_util_fd_t fd, const char *name, unsigned *log_secsize)
{
unsigned long long nr;
unsigned sector_size, log_sector_size;
if (ioctl (fd, DIOCGMEDIASIZE, &nr))
return -1;
if (ioctl (fd, DIOCGSECTORSIZE, §or_size))
return -1;
if (sector_size & (sector_size - 1) || !sector_size)
return -1;
for (log_sector_size = 0;
(1 << log_sector_size) < sector_size;
log_sector_size++);
if (log_secsize)
*log_secsize = log_sector_size;
if (nr & (sector_size - 1))
grub_util_error ("%s", _("unaligned device size"));
return nr;
}
void
grub_hostdisk_flush_initial_buffer (const char *os_dev __attribute__ ((unused)))
{
}
grub_util_fd_t
grub_util_fd_open (const char *os_dev, int flags)
{
grub_util_fd_t ret;
int sysctl_flags, sysctl_oldflags;
size_t sysctl_size = sizeof (sysctl_flags);
#ifdef O_LARGEFILE
flags |= O_LARGEFILE;
#endif
#ifdef O_BINARY
flags |= O_BINARY;
#endif
if (sysctlbyname ("kern.geom.debugflags", &sysctl_oldflags, &sysctl_size, NULL, 0))
{
grub_error (GRUB_ERR_BAD_DEVICE, "cannot get current flags of sysctl kern.geom.debugflags");
return GRUB_UTIL_FD_INVALID;
}
sysctl_flags = sysctl_oldflags | 0x10;
if (! (sysctl_oldflags & 0x10)
&& sysctlbyname ("kern.geom.debugflags", NULL , 0, &sysctl_flags, sysctl_size))
{
if (errno == EPERM)
/* Running as an unprivileged user; don't worry about restoring
flags, although if we try to write to anything interesting such
as the MBR then we may fail later. */
sysctl_oldflags = 0x10;
else
{
grub_error (GRUB_ERR_BAD_DEVICE, "cannot set flags of sysctl kern.geom.debugflags");
return GRUB_UTIL_FD_INVALID;
}
}
ret = open (os_dev, flags, S_IROTH | S_IRGRP | S_IRUSR | S_IWUSR);
if (! (sysctl_oldflags & 0x10)
&& sysctlbyname ("kern.geom.debugflags", NULL , 0, &sysctl_oldflags, sysctl_size))
{
grub_error (GRUB_ERR_BAD_DEVICE, "cannot set flags back to the old value for sysctl kern.geom.debugflags");
close (ret);
return GRUB_UTIL_FD_INVALID;
}
return ret;
}
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