90 lines
2.3 KiB
C
90 lines
2.3 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>
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grub_uint64_t
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grub_util_get_fd_size (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, DKIOCGETBLOCKCOUNT, &nr))
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return -1;
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if (ioctl (fd, DKIOCGETBLOCKSIZE, §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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return nr << log_sector_size;
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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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#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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ret = open (os_dev, flags, S_IRUSR | S_IWUSR);
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/* If we can't have exclusive access, try shared access */
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if (ret < 0)
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ret = open (os_dev, flags | O_SHLOCK, S_IRUSR | S_IWUSR);
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return ret;
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}
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