1 /* $NetBSD: clri.c,v 1.14 2001/08/17 02:18:47 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rich $alz of BBN Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\n\ 42 The Regents of the University of California. All rights reserved.\n"); 43 #endif /* not lint */ 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)clri.c 8.3 (Berkeley) 4/28/95"; 48 #else 49 __RCSID("$NetBSD: clri.c,v 1.14 2001/08/17 02:18:47 lukem Exp $"); 50 #endif 51 #endif /* not lint */ 52 53 #include <sys/param.h> 54 #include <sys/time.h> 55 56 #include <ufs/ufs/dinode.h> 57 #include <ufs/ufs/ufs_bswap.h> 58 #include <ufs/ffs/fs.h> 59 #include <ufs/ffs/ffs_extern.h> 60 61 #include <err.h> 62 #include <errno.h> 63 #include <fcntl.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <unistd.h> 68 69 int main __P((int, char *[])); 70 71 int 72 main(argc, argv) 73 int argc; 74 char *argv[]; 75 { 76 struct fs *sbp; 77 struct dinode *ip; 78 int fd; 79 struct dinode ibuf[MAXBSIZE / sizeof (struct dinode)]; 80 int32_t generation; 81 off_t offset; 82 size_t bsize; 83 int inonum; 84 char *fs, sblock[SBSIZE]; 85 int needswap = 0; 86 int i, imax; 87 88 if (argc < 3) { 89 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 90 exit(1); 91 } 92 93 fs = *++argv; 94 95 96 /* get the superblock. */ 97 if ((fd = open(fs, O_RDWR, 0)) < 0) 98 err(1, "%s", fs); 99 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0) 100 err(1, "%s", fs); 101 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 102 errx(1, "%s: can't read superblock", fs); 103 104 sbp = (struct fs *)sblock; 105 if (sbp->fs_magic != FS_MAGIC) { 106 if (sbp->fs_magic == bswap32(FS_MAGIC)) 107 needswap = 1; 108 else 109 errx(1, "%s: superblock magic number 0x%x, not 0x%x", 110 fs, sbp->fs_magic, FS_MAGIC); 111 } 112 113 /* check that inode numbers are valid */ 114 imax = ufs_rw32(sbp->fs_ncg, needswap) * 115 ufs_rw32(sbp->fs_ipg, needswap); 116 for (i = 1; i < (argc - 1); i++) 117 if (atoi(argv[i]) <= 0 || atoi(argv[i]) >= imax) 118 errx(1, "%s is not a valid inode number", argv[i]); 119 120 /* delete clean flag in the superblok */ 121 sbp->fs_clean = ufs_rw32( 122 ufs_rw32(sbp->fs_clean, needswap) << 1, 123 needswap); 124 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0) 125 err(1, "%s", fs); 126 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 127 errx(1, "%s: can't rewrite superblock", fs); 128 (void)fsync(fd); 129 130 if (needswap) 131 ffs_sb_swap(sbp, sbp); 132 bsize = sbp->fs_bsize; 133 134 /* remaining arguments are inode numbers. */ 135 while (*++argv) { 136 /* get the inode number. */ 137 inonum = atoi(*argv); 138 (void)printf("clearing %d\n", inonum); 139 140 /* read in the appropriate block. */ 141 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 142 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 143 offset *= DEV_BSIZE; /* disk blk to bytes */ 144 145 /* seek and read the block */ 146 if (lseek(fd, offset, SEEK_SET) < 0) 147 err(1, "%s", fs); 148 if (read(fd, ibuf, bsize) != bsize) 149 err(1, "%s", fs); 150 151 /* get the inode within the block. */ 152 ip = &ibuf[ino_to_fsbo(sbp, inonum)]; 153 154 /* clear the inode, and bump the generation count. */ 155 generation = ip->di_gen + 1; 156 memset(ip, 0, sizeof(*ip)); 157 ip->di_gen = generation; 158 159 /* backup and write the block */ 160 if (lseek(fd, offset, SEEK_SET) < 0) 161 err(1, "%s", fs); 162 if (write(fd, ibuf, bsize) != bsize) 163 err(1, "%s", fs); 164 (void)fsync(fd); 165 } 166 (void)close(fd); 167 exit(0); 168 } 169