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/* $OpenBSD: clri.c,v 1.10 2004/01/25 19:18:54 deraadt Exp $ */
/* $NetBSD: clri.c,v 1.9 1995/03/18 14:54:33 cgd Exp $ */
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rich $alz of BBN Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93";
#else
static char rcsid[] = "$OpenBSD: clri.c,v 1.10 2004/01/25 19:18:54 deraadt Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
int
main(int argc, char *argv[])
{
struct ufs1_dinode ibuf[MAXBSIZE / sizeof (struct ufs1_dinode)];
char *fs, sblock[SBSIZE];
struct ufs1_dinode *ip;
struct fs *sbp;
int fd, inonum;
off_t offset;
size_t bsize;
if (argc < 3) {
fprintf(stderr, "usage: clri filesystem inode ...\n");
return (1);
}
fs = *++argv;
/* get the superblock. */
if ((fd = open(fs, O_RDWR, 0)) < 0)
err(1, "%s", fs);
if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0)
err(1, "%s", fs);
if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock))
errx(1, "%s: can't read superblock", fs);
sbp = (struct fs *)sblock;
if (sbp->fs_magic != FS_MAGIC)
errx(1, "%s: superblock magic number 0x%x, not 0x%x",
fs, sbp->fs_magic, FS_MAGIC);
bsize = sbp->fs_bsize;
/* remaining arguments are inode numbers. */
while (*++argv) {
/* get the inode number. */
if ((inonum = atoi(*argv)) <= 0)
errx(1, "%s is not a valid inode number", *argv);
(void)printf("clearing %d\n", inonum);
/* read in the appropriate block. */
offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */
offset = fsbtodb(sbp, offset); /* fs blk disk blk */
offset *= DEV_BSIZE; /* disk blk to bytes */
/* seek and read the block */
if (lseek(fd, offset, SEEK_SET) < 0)
err(1, "%s", fs);
if (read(fd, ibuf, bsize) != bsize)
err(1, "%s", fs);
/* get the inode within the block. */
ip = &ibuf[ino_to_fsbo(sbp, inonum)];
/* clear the inode, and bump the generation count. */
memset(ip, 0, sizeof(*ip));
ip->di_gen = arc4random();
/* backup and write the block */
if (lseek(fd, offset, SEEK_SET) < 0)
err(1, "%s", fs);
if (write(fd, ibuf, bsize) != bsize)
err(1, "%s", fs);
(void)fsync(fd);
if (sbp->fs_inodefmt >= FS_44INODEFMT) {
/* update after each inode cleared */
sbp->fs_clean = 0;
if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0)
err(1, "%s", fs);
if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock))
errx(1, "%s: can't update superblock", fs);
}
}
return close(fd);
}
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