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74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*
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* Copyright (c) 2003 Juli Mallett. All rights reserved.
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*
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* This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
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* FreeBSD project. Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistribution in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/disklabel.h>
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#include <sys/stat.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <libufs.h>
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int
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cgread(struct uufsd *disk)
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{
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return (cgread1(disk, disk->d_ccg++));
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}
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int
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cgread1(struct uufsd *disk, int c)
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{
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struct fs *fs;
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off_t ccg;
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fs = &disk->d_fs;
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if (c >= fs->fs_ncg) {
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return (0);
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}
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ccg = fsbtodb(fs, cgtod(fs, c)) * disk->d_bsize;
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if (bread(disk, fsbtodb(fs, cgtod(fs, c)), disk->d_cgunion.d_buf,
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fs->fs_bsize) == -1) {
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ERROR(disk, "unable to read cylinder group");
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return (-1);
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}
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disk->d_lcg = c;
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return (1);
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}
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