1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 $alz of BBN Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if 0 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1990, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93"; 44 #endif /* not lint */ 45 #endif 46 47 #include <sys/cdefs.h> 48 __FBSDID("$FreeBSD$"); 49 50 #include <sys/param.h> 51 #include <sys/disklabel.h> 52 53 #include <ufs/ufs/dinode.h> 54 #include <ufs/ffs/fs.h> 55 56 #include <err.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <libufs.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <unistd.h> 64 65 static void 66 usage(void) 67 { 68 (void)fprintf(stderr, "usage: clri special_device inode_number ...\n"); 69 exit(1); 70 } 71 72 int 73 main(int argc, char *argv[]) 74 { 75 struct fs *fs; 76 struct ufs1_dinode *dp1; 77 struct ufs2_dinode *dp2; 78 char *ibuf[MAXBSIZE]; 79 long generation, bsize; 80 off_t offset; 81 int fd, ret, inonum; 82 char *fsname; 83 void *v = ibuf; 84 85 if (argc < 3) 86 usage(); 87 88 fsname = *++argv; 89 90 /* get the superblock. */ 91 if ((fd = open(fsname, O_RDWR, 0)) < 0) 92 err(1, "%s", fsname); 93 if ((ret = sbget(fd, &fs, -1)) != 0) { 94 switch (ret) { 95 case ENOENT: 96 warn("Cannot find file system superblock"); 97 return (1); 98 default: 99 warn("Unable to read file system superblock"); 100 return (1); 101 } 102 } 103 bsize = fs->fs_bsize; 104 105 /* remaining arguments are inode numbers. */ 106 while (*++argv) { 107 /* get the inode number. */ 108 if ((inonum = atoi(*argv)) <= 0) 109 errx(1, "%s is not a valid inode number", *argv); 110 (void)printf("clearing %d\n", inonum); 111 112 /* read in the appropriate block. */ 113 offset = ino_to_fsba(fs, inonum); /* inode to fs blk */ 114 offset = fsbtodb(fs, offset); /* fs blk disk blk */ 115 offset *= DEV_BSIZE; /* disk blk to bytes */ 116 117 /* seek and read the block */ 118 if (lseek(fd, offset, SEEK_SET) < 0) 119 err(1, "%s", fsname); 120 if (read(fd, ibuf, bsize) != bsize) 121 err(1, "%s", fsname); 122 123 if (fs->fs_magic == FS_UFS2_MAGIC) { 124 /* get the inode within the block. */ 125 dp2 = &(((struct ufs2_dinode *)v) 126 [ino_to_fsbo(fs, inonum)]); 127 128 /* clear the inode, and bump the generation count. */ 129 generation = dp2->di_gen + 1; 130 memset(dp2, 0, sizeof(*dp2)); 131 dp2->di_gen = generation; 132 } else { 133 /* get the inode within the block. */ 134 dp1 = &(((struct ufs1_dinode *)v) 135 [ino_to_fsbo(fs, inonum)]); 136 137 /* clear the inode, and bump the generation count. */ 138 generation = dp1->di_gen + 1; 139 memset(dp1, 0, sizeof(*dp1)); 140 dp1->di_gen = generation; 141 } 142 143 /* backup and write the block */ 144 if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0) 145 err(1, "%s", fsname); 146 if (write(fd, ibuf, bsize) != bsize) 147 err(1, "%s", fsname); 148 (void)fsync(fd); 149 } 150 (void)close(fd); 151 exit(0); 152 } 153