159 lines
4.7 KiB
C
159 lines
4.7 KiB
C
/*
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rich $alz of BBN Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions 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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1990, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93";
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#endif /* not lint */
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#endif
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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/disklabel.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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/*
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* Possible superblock locations ordered from most to least likely.
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*/
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static int sblock_try[] = SBLOCKSEARCH;
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: clri special_device inode_number ...\n");
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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struct fs *sbp;
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struct ufs1_dinode *dp1;
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struct ufs2_dinode *dp2;
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char *ibuf[MAXBSIZE];
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long generation, bsize;
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off_t offset;
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int i, fd, inonum;
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char *fs, sblock[SBLOCKSIZE];
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if (argc < 3)
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usage();
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fs = *++argv;
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/* get the superblock. */
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if ((fd = open(fs, O_RDWR, 0)) < 0)
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err(1, "%s", fs);
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for (i = 0; sblock_try[i] != -1; i++) {
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if (lseek(fd, (off_t)(sblock_try[i]), SEEK_SET) < 0)
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err(1, "%s", fs);
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if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock))
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errx(1, "%s: can't read superblock", fs);
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sbp = (struct fs *)sblock;
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if ((sbp->fs_magic == FS_UFS1_MAGIC ||
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(sbp->fs_magic == FS_UFS2_MAGIC &&
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sbp->fs_sblockloc == sblock_try[i])) &&
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sbp->fs_bsize <= MAXBSIZE &&
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sbp->fs_bsize >= (int)sizeof(struct fs))
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break;
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}
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if (sblock_try[i] == -1) {
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fprintf(stderr, "Cannot find file system superblock\n");
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exit(2);
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}
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bsize = sbp->fs_bsize;
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/* remaining arguments are inode numbers. */
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while (*++argv) {
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/* get the inode number. */
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if ((inonum = atoi(*argv)) <= 0)
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errx(1, "%s is not a valid inode number", *argv);
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(void)printf("clearing %d\n", inonum);
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/* read in the appropriate block. */
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offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */
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offset = fsbtodb(sbp, offset); /* fs blk disk blk */
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offset *= DEV_BSIZE; /* disk blk to bytes */
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/* seek and read the block */
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if (lseek(fd, offset, SEEK_SET) < 0)
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err(1, "%s", fs);
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if (read(fd, ibuf, bsize) != bsize)
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err(1, "%s", fs);
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if (sbp->fs_magic == FS_UFS2_MAGIC) {
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/* get the inode within the block. */
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dp2 = &(((struct ufs2_dinode *)ibuf)
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[ino_to_fsbo(sbp, inonum)]);
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/* clear the inode, and bump the generation count. */
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generation = dp2->di_gen + 1;
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memset(dp2, 0, sizeof(*dp2));
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dp2->di_gen = generation;
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} else {
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/* get the inode within the block. */
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dp1 = &(((struct ufs1_dinode *)ibuf)
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[ino_to_fsbo(sbp, inonum)]);
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/* clear the inode, and bump the generation count. */
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generation = dp1->di_gen + 1;
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memset(dp1, 0, sizeof(*dp1));
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dp1->di_gen = generation;
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}
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/* backup and write the block */
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if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0)
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err(1, "%s", fs);
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if (write(fd, ibuf, bsize) != bsize)
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err(1, "%s", fs);
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(void)fsync(fd);
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}
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(void)close(fd);
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exit(0);
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}
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