049f63824c
Many tests fail when run as a non-root user on FreeBSD. The failures all amount to an inability to open files using grub_util_fd_open, because we cannot set the kern.geom.debugflags sysctl. This sysctl is indeed important to allow us to do such things as installing GRUB to the MBR, but if we need to do that and can't then we will get an error later. Enforcing it here is unnecessary and prevents otherwise perfectly reasonable operations.
128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2004,2006,2007,2008,2009,2010,2011,2012,2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config-util.h>
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#include <grub/disk.h>
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#include <grub/partition.h>
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#include <grub/msdos_partition.h>
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#include <grub/types.h>
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#include <grub/err.h>
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#include <grub/emu/misc.h>
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#include <grub/emu/hostdisk.h>
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#include <grub/emu/getroot.h>
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#include <grub/misc.h>
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#include <grub/i18n.h>
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#include <grub/list.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <assert.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <limits.h>
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# include <sys/disk.h> /* DIOCGMEDIASIZE */
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# include <sys/param.h>
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# include <sys/sysctl.h>
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# include <sys/mount.h>
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# include <libgeom.h>
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grub_int64_t
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grub_util_get_fd_size_os (grub_util_fd_t fd, const char *name, unsigned *log_secsize)
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{
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unsigned long long nr;
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unsigned sector_size, log_sector_size;
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if (ioctl (fd, DIOCGMEDIASIZE, &nr))
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return -1;
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if (ioctl (fd, DIOCGSECTORSIZE, §or_size))
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return -1;
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if (sector_size & (sector_size - 1) || !sector_size)
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return -1;
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for (log_sector_size = 0;
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(1 << log_sector_size) < sector_size;
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log_sector_size++);
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if (log_secsize)
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*log_secsize = log_sector_size;
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if (nr & (sector_size - 1))
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grub_util_error ("%s", _("unaligned device size"));
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return nr;
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}
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void
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grub_hostdisk_flush_initial_buffer (const char *os_dev __attribute__ ((unused)))
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{
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}
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grub_util_fd_t
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grub_util_fd_open (const char *os_dev, int flags)
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{
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grub_util_fd_t ret;
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int sysctl_flags, sysctl_oldflags;
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size_t sysctl_size = sizeof (sysctl_flags);
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#ifdef O_LARGEFILE
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flags |= O_LARGEFILE;
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#endif
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#ifdef O_BINARY
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flags |= O_BINARY;
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#endif
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if (sysctlbyname ("kern.geom.debugflags", &sysctl_oldflags, &sysctl_size, NULL, 0))
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{
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grub_error (GRUB_ERR_BAD_DEVICE, "cannot get current flags of sysctl kern.geom.debugflags");
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return GRUB_UTIL_FD_INVALID;
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}
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sysctl_flags = sysctl_oldflags | 0x10;
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if (! (sysctl_oldflags & 0x10)
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&& sysctlbyname ("kern.geom.debugflags", NULL , 0, &sysctl_flags, sysctl_size))
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{
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if (errno == EPERM)
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/* Running as an unprivileged user; don't worry about restoring
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flags, although if we try to write to anything interesting such
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as the MBR then we may fail later. */
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sysctl_oldflags = 0x10;
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else
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{
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grub_error (GRUB_ERR_BAD_DEVICE, "cannot set flags of sysctl kern.geom.debugflags");
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return GRUB_UTIL_FD_INVALID;
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}
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}
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ret = open (os_dev, flags, S_IROTH | S_IRGRP | S_IRUSR | S_IWUSR);
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if (! (sysctl_oldflags & 0x10)
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&& sysctlbyname ("kern.geom.debugflags", NULL , 0, &sysctl_oldflags, sysctl_size))
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{
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grub_error (GRUB_ERR_BAD_DEVICE, "cannot set flags back to the old value for sysctl kern.geom.debugflags");
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close (ret);
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return GRUB_UTIL_FD_INVALID;
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}
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return ret;
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}
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