1 /* $NetBSD: clri.c,v 1.24 2015/08/30 05:23:17 mlelstv 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 1.24 2015/08/30 05:23:17 mlelstv 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 is_ufs2 = 1; 111 /*FALLTHROUGH*/ 112 case FS_UFS1_MAGIC: 113 break; 114 case FS_UFS2_MAGIC_SWAPPED: 115 is_ufs2 = 1; 116 /*FALLTHROUGH*/ 117 case FS_UFS1_MAGIC_SWAPPED: 118 needswap = 1; 119 break; 120 default: 121 continue; 122 } 123 124 /* check we haven't found an alternate */ 125 if (is_ufs2 || sbp->fs_old_flags & FS_FLAGS_UPDATED) { 126 if ((uint64_t)sblockloc != ufs_rw64(sbp->fs_sblockloc, needswap)) 127 continue; 128 } else { 129 if (sblockloc == SBLOCK_UFS2) 130 continue; 131 } 132 133 break; 134 } 135 136 /* check that inode numbers are valid */ 137 imax = ufs_rw32(sbp->fs_ncg, needswap) * 138 ufs_rw32(sbp->fs_ipg, needswap); 139 for (i = 1; i < (argc - 1); i++) 140 if (atoi(argv[i]) <= 0 || atoi(argv[i]) >= imax) 141 errx(1, "%s is not a valid inode number", argv[i]); 142 143 /* delete clean flag in the superblok */ 144 sbp->fs_clean = ufs_rw32(ufs_rw32(sbp->fs_clean, needswap) << 1, 145 needswap); 146 if (lseek(fd, sblockloc, SEEK_SET) < 0) 147 err(1, "%s", fs); 148 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 149 errx(1, "%s: can't rewrite superblock", fs); 150 (void)fsync(fd); 151 152 if (needswap) 153 ffs_sb_swap(sbp, sbp); 154 155 /* compute disk block size from superblock parameters */ 156 dev_bsize = sbp->fs_fsize / FFS_FSBTODB(sbp, 1); 157 158 bsize = sbp->fs_bsize; 159 ibuf = malloc(bsize); 160 if (ibuf == NULL) { 161 err(1, "malloc"); 162 } 163 164 /* remaining arguments are inode numbers. */ 165 while (*++argv) { 166 /* get the inode number. */ 167 inonum = atoi(*argv); 168 (void)printf("clearing %d\n", inonum); 169 170 /* read in the appropriate block. */ 171 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 172 offset = FFS_FSBTODB(sbp, offset); /* fs blk disk blk */ 173 offset *= dev_bsize; /* disk blk to bytes */ 174 175 /* seek and read the block */ 176 if (lseek(fd, offset, SEEK_SET) < 0) 177 err(1, "%s", fs); 178 if ((size_t)read(fd, ibuf, bsize) != bsize) 179 err(1, "%s", fs); 180 181 /* get the inode within the block. */ 182 if (is_ufs2) { 183 ip2 = &((struct ufs2_dinode *)ibuf) 184 [ino_to_fsbo(sbp, inonum)]; 185 /* clear the inode, and bump the generation count. */ 186 generation = ip2->di_gen + 1; 187 memset(ip2, 0, sizeof(*ip2)); 188 ip2->di_gen = generation; 189 } else { 190 ip1 = &((struct ufs1_dinode *)ibuf) 191 [ino_to_fsbo(sbp, inonum)]; 192 /* clear the inode, and bump the generation count. */ 193 generation = ip1->di_gen + 1; 194 memset(ip1, 0, sizeof(*ip1)); 195 ip1->di_gen = generation; 196 } 197 198 /* backup and write the block */ 199 if (lseek(fd, offset, SEEK_SET) < 0) 200 err(1, "%s", fs); 201 if ((size_t)write(fd, ibuf, bsize) != bsize) 202 err(1, "%s", fs); 203 (void)fsync(fd); 204 } 205 free(ibuf); 206 (void)close(fd); 207 exit(0); 208 } 209