clri.c revision 1.16
1 /* $NetBSD: clri.c,v 1.16 2003/08/07 10:04:12 agc 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 $alz of BBN Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)clri.c 8.3 (Berkeley) 4/28/95"; 44 #else 45 __RCSID("$NetBSD: clri.c,v 1.16 2003/08/07 10:04:12 agc Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/time.h> 51 52 #include <ufs/ufs/dinode.h> 53 #include <ufs/ufs/ufs_bswap.h> 54 #include <ufs/ffs/fs.h> 55 #include <ufs/ffs/ffs_extern.h> 56 57 #include <err.h> 58 #include <errno.h> 59 #include <fcntl.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <unistd.h> 64 65 /* 66 * Possible superblock locations ordered from most to least likely. 67 */ 68 static off_t sblock_try[] = SBLOCKSEARCH; 69 off_t sblockloc; 70 71 72 int main __P((int, char *[])); 73 74 int 75 main(argc, argv) 76 int argc; 77 char *argv[]; 78 { 79 struct fs *sbp; 80 struct ufs1_dinode *ip1; 81 struct ufs2_dinode *ip2; 82 int fd; 83 char *ibuf[MAXBSIZE]; 84 int32_t generation; 85 off_t offset; 86 size_t bsize; 87 int inonum; 88 char *fs, sblock[SBLOCKSIZE]; 89 int needswap = 0, is_ufs2 = 0; 90 int i, imax; 91 92 if (argc < 3) { 93 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 94 exit(1); 95 } 96 97 fs = *++argv; 98 99 100 /* get the superblock. */ 101 if ((fd = open(fs, O_RDWR, 0)) < 0) 102 err(1, "%s", fs); 103 for (i = 0; i < sblock_try[i] != -1; i++) { 104 if (lseek(fd, sblock_try[i], SEEK_SET) < 0) 105 err(1, "%s", fs); 106 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 107 errx(1, "%s: can't read superblock", fs); 108 109 sbp = (struct fs *)sblock; 110 switch(sbp->fs_magic) { 111 case FS_UFS2_MAGIC: 112 is_ufs2 = 1; 113 /*FALLTHROUGH*/ 114 case FS_UFS1_MAGIC: 115 goto found; 116 case FS_UFS2_MAGIC_SWAPPED: 117 is_ufs2 = 1; 118 /*FALLTHROUGH*/ 119 case FS_UFS1_MAGIC_SWAPPED: 120 needswap = 1; 121 goto found; 122 default: 123 continue; 124 } 125 } 126 errx(1, "%s: can't find superblock", fs); 127 128 found: 129 sblockloc = sblock_try[i]; 130 /* check that inode numbers are valid */ 131 imax = ufs_rw32(sbp->fs_ncg, needswap) * 132 ufs_rw32(sbp->fs_ipg, needswap); 133 for (i = 1; i < (argc - 1); i++) 134 if (atoi(argv[i]) <= 0 || atoi(argv[i]) >= imax) 135 errx(1, "%s is not a valid inode number", argv[i]); 136 137 /* delete clean flag in the superblok */ 138 sbp->fs_clean = ufs_rw32( 139 ufs_rw32(sbp->fs_clean, needswap) << 1, 140 needswap); 141 if (lseek(fd, sblockloc, SEEK_SET) < 0) 142 err(1, "%s", fs); 143 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 144 errx(1, "%s: can't rewrite superblock", fs); 145 (void)fsync(fd); 146 147 if (needswap) 148 ffs_sb_swap(sbp, sbp); 149 bsize = sbp->fs_bsize; 150 151 /* remaining arguments are inode numbers. */ 152 while (*++argv) { 153 /* get the inode number. */ 154 inonum = atoi(*argv); 155 (void)printf("clearing %d\n", inonum); 156 157 /* read in the appropriate block. */ 158 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 159 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 160 offset *= DEV_BSIZE; /* disk blk to bytes */ 161 162 /* seek and read the block */ 163 if (lseek(fd, offset, SEEK_SET) < 0) 164 err(1, "%s", fs); 165 if (read(fd, ibuf, bsize) != bsize) 166 err(1, "%s", fs); 167 168 /* get the inode within the block. */ 169 if (is_ufs2) { 170 ip2 = &((struct ufs2_dinode *)ibuf) 171 [ino_to_fsbo(sbp, inonum)]; 172 /* clear the inode, and bump the generation count. */ 173 generation = ip2->di_gen + 1; 174 memset(ip2, 0, sizeof(*ip2)); 175 ip2->di_gen = generation; 176 } else { 177 ip1 = &((struct ufs1_dinode *)ibuf) 178 [ino_to_fsbo(sbp, inonum)]; 179 /* clear the inode, and bump the generation count. */ 180 generation = ip1->di_gen + 1; 181 memset(ip1, 0, sizeof(*ip1)); 182 ip1->di_gen = generation; 183 } 184 185 /* backup and write the block */ 186 if (lseek(fd, offset, SEEK_SET) < 0) 187 err(1, "%s", fs); 188 if (write(fd, ibuf, bsize) != bsize) 189 err(1, "%s", fs); 190 (void)fsync(fd); 191 } 192 (void)close(fd); 193 exit(0); 194 } 195
Indexes created Thu Oct 02 01:09:59 GMT 2025