NetBSD/sbin/clri/clri.c

147 lines
4.4 KiB
C

/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rich $alz of BBN Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1990 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)clri.c 5.3 (Berkeley) 6/29/91";
static char rcsid[] = "$Header: /cvsroot/src/sbin/clri/clri.c,v 1.3 1993/03/23 00:26:33 cgd Exp $";
#endif /* not lint */
/*
* clri(8)
*/
#include <sys/param.h>
#include <ufs/quota.h>
#include <ufs/inode.h>
#include <ufs/fs.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
char *fs;
main(argc, argv)
int argc;
char **argv;
{
register struct fs *sbp;
register struct dinode *ip;
register int fd;
struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)];
long generation, offset, bsize;
int inonum;
char sblock[SBSIZE];
if (argc < 3) {
(void)fprintf(stderr, "usage: clri filesystem inode ...\n");
exit(1);
}
fs = *++argv;
/* get the superblock. */
if ((fd = open(fs, O_RDWR, 0)) < 0)
error();
if (lseek(fd, SBLOCK * DEV_BSIZE, SEEK_SET) < 0)
error();
if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) {
(void)fprintf(stderr,
"clri: %s: can't read the superblock.\n", fs);
exit(1);
}
sbp = (struct fs *)sblock;
if (sbp->fs_magic != FS_MAGIC) {
(void)fprintf(stderr,
"clri: %s: superblock magic number 0x%x, not 0x%x.\n",
fs, sbp->fs_magic, FS_MAGIC);
exit(1);
}
bsize = sbp->fs_bsize;
/* remaining arguments are inode numbers. */
while (*++argv) {
/* get the inode number. */
if ((inonum = atoi(*argv)) <= 0) {
(void)fprintf(stderr,
"clri: %s is not a valid inode number.\n", *argv);
exit(1);
}
(void)printf("clearing %d\n", inonum);
/* read in the appropriate block. */
offset = itod(sbp, inonum); /* inode to fs block */
offset = fsbtodb(sbp, offset); /* fs block to disk block */
offset *= DEV_BSIZE; /* disk block to disk bytes */
/* seek and read the block */
if (lseek(fd, offset, SEEK_SET) < 0)
error();
if (read(fd, (char *)ibuf, bsize) != bsize)
error();
/* get the inode within the block. */
ip = &ibuf[itoo(sbp, inonum)];
/* clear the inode, and bump the generation count. */
generation = ip->di_gen + 1;
bzero((char *)ip, sizeof *ip);
ip->di_gen = generation;
/* backup and write the block */
if (lseek(fd, -bsize, SEEK_CUR) < 0)
error();
if (write(fd, (char *)ibuf, bsize) != bsize)
error();
(void)fsync(fd);
}
(void)close(fd);
exit(0);
}
error()
{
(void)fprintf(stderr, "clri: %s: %s\n", fs, strerror(errno));
exit(1);
}