1 /* $NetBSD: clri.c,v 1.26 2023/02/26 22:55:02 andvar 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 $alz of BBN Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\ 38 The Regents of the University of California. All rights reserved."); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)clri.c 8.3 (Berkeley) 4/28/95"; 44 #else 45 __RCSID("$NetBSD: clri.c,v 1.26 2023/02/26 22:55:02 andvar 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 73 main(int argc, char *argv[]) 74 { 75 struct fs *sbp; 76 struct ufs1_dinode *ip1; 77 struct ufs2_dinode *ip2; 78 int fd; 79 void *ibuf; 80 int32_t generation; 81 off_t offset; 82 size_t bsize; 83 int inonum; 84 char *fs, sblock[SBLOCKSIZE]; 85 int needswap = 0, is_ufs2 = 0; 86 int i, imax; 87 long dev_bsize; 88 89 if (argc < 3) { 90 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 91 exit(1); 92 } 93 94 fs = *++argv; 95 96 97 /* get the superblock. */ 98 if ((fd = open(fs, O_RDWR, 0)) < 0) 99 err(1, "%s", fs); 100 for (i = 0;; i++) { 101 sblockloc = sblock_try[i]; 102 if (sblockloc == -1) 103 errx(1, "%s: can't find superblock", fs); 104 if (pread(fd, sblock, sizeof(sblock), sblockloc) != sizeof(sblock)) 105 errx(1, "%s: can't read superblock", fs); 106 107 sbp = (struct fs *)sblock; 108 switch(sbp->fs_magic) { 109 case FS_UFS2_MAGIC: 110 case FS_UFS2EA_MAGIC: 111 is_ufs2 = 1; 112 /*FALLTHROUGH*/ 113 case FS_UFS1_MAGIC: 114 break; 115 case FS_UFS2_MAGIC_SWAPPED: 116 case FS_UFS2EA_MAGIC_SWAPPED: 117 is_ufs2 = 1; 118 /*FALLTHROUGH*/ 119 case FS_UFS1_MAGIC_SWAPPED: 120 needswap = 1; 121 break; 122 default: 123 continue; 124 } 125 126 /* check we haven't found an alternate */ 127 if (is_ufs2 || sbp->fs_old_flags & FS_FLAGS_UPDATED) { 128 if ((uint64_t)sblockloc != ufs_rw64(sbp->fs_sblockloc, needswap)) 129 continue; 130 } else { 131 if (sblockloc == SBLOCK_UFS2) 132 continue; 133 } 134 135 break; 136 } 137 138 /* check that inode numbers are valid */ 139 imax = ufs_rw32(sbp->fs_ncg, needswap) * 140 ufs_rw32(sbp->fs_ipg, needswap); 141 for (i = 1; i < (argc - 1); i++) 142 if (atoi(argv[i]) <= 0 || atoi(argv[i]) >= imax) 143 errx(1, "%s is not a valid inode number", argv[i]); 144 145 /* delete clean flag in the superblock */ 146 sbp->fs_clean = ufs_rw32(ufs_rw32(sbp->fs_clean, needswap) << 1, 147 needswap); 148 if (lseek(fd, sblockloc, SEEK_SET) < 0) 149 err(1, "%s", fs); 150 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 151 errx(1, "%s: can't rewrite superblock", fs); 152 (void)fsync(fd); 153 154 if (needswap) 155 ffs_sb_swap(sbp, sbp); 156 157 /* compute disk block size from superblock parameters */ 158 dev_bsize = sbp->fs_fsize / FFS_FSBTODB(sbp, 1); 159 160 bsize = sbp->fs_bsize; 161 ibuf = malloc(bsize); 162 if (ibuf == NULL) { 163 err(1, "malloc"); 164 } 165 166 /* remaining arguments are inode numbers. */ 167 while (*++argv) { 168 /* get the inode number. */ 169 inonum = atoi(*argv); 170 (void)printf("clearing %d\n", inonum); 171 172 /* read in the appropriate block. */ 173 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 174 offset = FFS_FSBTODB(sbp, offset); /* fs blk disk blk */ 175 offset *= dev_bsize; /* disk blk to bytes */ 176 177 /* seek and read the block */ 178 if (lseek(fd, offset, SEEK_SET) < 0) 179 err(1, "%s", fs); 180 if ((size_t)read(fd, ibuf, bsize) != bsize) 181 err(1, "%s", fs); 182 183 /* get the inode within the block. */ 184 if (is_ufs2) { 185 ip2 = &((struct ufs2_dinode *)ibuf) 186 [ino_to_fsbo(sbp, inonum)]; 187 /* clear the inode, and bump the generation count. */ 188 generation = ip2->di_gen + 1; 189 memset(ip2, 0, sizeof(*ip2)); 190 ip2->di_gen = generation; 191 } else { 192 ip1 = &((struct ufs1_dinode *)ibuf) 193 [ino_to_fsbo(sbp, inonum)]; 194 /* clear the inode, and bump the generation count. */ 195 generation = ip1->di_gen + 1; 196 memset(ip1, 0, sizeof(*ip1)); 197 ip1->di_gen = generation; 198 } 199 200 /* backup and write the block */ 201 if (lseek(fd, offset, SEEK_SET) < 0) 202 err(1, "%s", fs); 203 if ((size_t)write(fd, ibuf, bsize) != bsize) 204 err(1, "%s", fs); 205 (void)fsync(fd); 206 } 207 free(ibuf); 208 (void)close(fd); 209 exit(0); 210 } 211
Indexes created Thu Oct 02 14:10:14 GMT 2025