/* * 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. 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 static const 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"; #endif #endif /* not lint */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/disklabel.h> #include <ufs/ufs/dinode.h> #include <ufs/ffs/fs.h> #include <err.h> #include <fcntl.h> #include <stdlib.h> #include <string.h> #include <stdio.h> #include <unistd.h> /* * Possible superblock locations ordered from most to least likely. */ static int sblock_try[] = SBLOCKSEARCH; static void usage(void) { (void)fprintf(stderr, "usage: clri special_device inode_number ...\n"); exit(1); } int main(int argc, char *argv[]) { struct fs *sbp; struct ufs1_dinode *dp1; struct ufs2_dinode *dp2; char *ibuf[MAXBSIZE]; long generation, bsize; off_t offset; int i, fd, inonum; char *fs, sblock[SBLOCKSIZE]; if (argc < 3) usage(); fs = *++argv; /* get the superblock. */ if ((fd = open(fs, O_RDWR, 0)) < 0) err(1, "%s", fs); for (i = 0; sblock_try[i] != -1; i++) { if (lseek(fd, (off_t)(sblock_try[i]), 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_UFS1_MAGIC || (sbp->fs_magic == FS_UFS2_MAGIC && sbp->fs_sblockloc == sblock_try[i])) && sbp->fs_bsize <= MAXBSIZE && sbp->fs_bsize >= (int)sizeof(struct fs)) break; } if (sblock_try[i] == -1) { fprintf(stderr, "Cannot find file system superblock\n"); exit(2); } 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); if (sbp->fs_magic == FS_UFS2_MAGIC) { /* get the inode within the block. */ dp2 = &(((struct ufs2_dinode *)ibuf) [ino_to_fsbo(sbp, inonum)]); /* clear the inode, and bump the generation count. */ generation = dp2->di_gen + 1; memset(dp2, 0, sizeof(*dp2)); dp2->di_gen = generation; } else { /* get the inode within the block. */ dp1 = &(((struct ufs1_dinode *)ibuf) [ino_to_fsbo(sbp, inonum)]); /* clear the inode, and bump the generation count. */ generation = dp1->di_gen + 1; memset(dp1, 0, sizeof(*dp1)); dp1->di_gen = generation; } /* backup and write the block */ if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0) err(1, "%s", fs); if (write(fd, ibuf, bsize) != bsize) err(1, "%s", fs); (void)fsync(fd); } (void)close(fd); exit(0); }