| /* |
| * 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; |
| } |