1 /* 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rich $alz of BBN Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#) Copyright (c) 1990, 1993 The Regents of the University of California. All rights reserved. 33 * @(#)clri.c 8.2 (Berkeley) 9/23/93 34 * $FreeBSD: src/sbin/clri/clri.c,v 1.4 1999/08/28 00:12:32 peter Exp $ 35 * $DragonFly: src/sbin/clri/clri.c,v 1.8 2006/04/03 01:58:48 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 40 #include <vfs/ufs/dinode.h> 41 #include <vfs/ufs/fs.h> 42 43 #include <err.h> 44 #include <fcntl.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <stdio.h> 48 #include <unistd.h> 49 50 static void 51 usage(void) 52 { 53 fprintf(stderr, "usage: clri filesystem inode ...\n"); 54 exit(1); 55 } 56 57 int 58 main(int argc, char **argv) 59 { 60 struct fs *sbp; 61 struct ufs1_dinode *ip; 62 int fd; 63 struct ufs1_dinode ibuf[MAXBSIZE / sizeof (struct ufs1_dinode)]; 64 long generation, bsize; 65 off_t offset; 66 int inonum; 67 char *fs, sblock[SBSIZE]; 68 69 if (argc < 3) 70 usage(); 71 72 fs = *++argv; 73 74 /* get the superblock. */ 75 if ((fd = open(fs, O_RDWR, 0)) < 0) 76 err(1, "%s", fs); 77 if (lseek(fd, (off_t)SBOFF, SEEK_SET) < 0) 78 err(1, "%s", fs); 79 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 80 errx(1, "%s: can't read superblock", fs); 81 82 sbp = (struct fs *)sblock; 83 if (sbp->fs_magic != FS_MAGIC) 84 errx(1, "%s: superblock magic number 0x%x, not 0x%x", 85 fs, sbp->fs_magic, FS_MAGIC); 86 bsize = sbp->fs_bsize; 87 88 /* remaining arguments are inode numbers. */ 89 while (*++argv) { 90 /* get the inode number. */ 91 if ((inonum = atoi(*argv)) <= 0) 92 errx(1, "%s is not a valid inode number", *argv); 93 printf("clearing %d\n", inonum); 94 95 /* read in the appropriate block. */ 96 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 97 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 98 offset *= DEV_BSIZE; /* disk blk to bytes */ 99 100 /* seek and read the block */ 101 if (lseek(fd, offset, SEEK_SET) < 0) 102 err(1, "%s", fs); 103 if (read(fd, ibuf, bsize) != bsize) 104 err(1, "%s", fs); 105 106 /* get the inode within the block. */ 107 ip = &ibuf[ino_to_fsbo(sbp, inonum)]; 108 109 /* clear the inode, and bump the generation count. */ 110 generation = ip->di_gen + 1; 111 memset(ip, 0, sizeof(*ip)); 112 ip->di_gen = generation; 113 114 /* backup and write the block */ 115 if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0) 116 err(1, "%s", fs); 117 if (write(fd, ibuf, bsize) != bsize) 118 err(1, "%s", fs); 119 fsync(fd); 120 } 121 close(fd); 122 exit(0); 123 } 124