1 /* 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rich $alz of BBN Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1990, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD$"; 49 #endif /* not lint */ 50 51 #include <sys/param.h> 52 #include <sys/disklabel.h> 53 54 #include <ufs/ufs/dinode.h> 55 #include <ufs/ffs/fs.h> 56 57 #include <err.h> 58 #include <fcntl.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <stdio.h> 62 #include <unistd.h> 63 64 static void 65 usage(void) 66 { 67 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 68 exit(1); 69 } 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 long generation, bsize; 81 off_t offset; 82 int inonum; 83 char *fs, sblock[SBSIZE]; 84 85 if (argc < 3) 86 usage(); 87 88 fs = *++argv; 89 90 /* get the superblock. */ 91 if ((fd = open(fs, O_RDWR, 0)) < 0) 92 err(1, "%s", fs); 93 if (lseek(fd, (off_t)(SBLOCK * DEV_BSIZE), SEEK_SET) < 0) 94 err(1, "%s", fs); 95 if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 96 errx(1, "%s: can't read superblock", fs); 97 98 sbp = (struct fs *)sblock; 99 if (sbp->fs_magic != FS_MAGIC) 100 errx(1, "%s: superblock magic number 0x%x, not 0x%x", 101 fs, sbp->fs_magic, FS_MAGIC); 102 bsize = sbp->fs_bsize; 103 104 /* remaining arguments are inode numbers. */ 105 while (*++argv) { 106 /* get the inode number. */ 107 if ((inonum = atoi(*argv)) <= 0) 108 errx(1, "%s is not a valid inode number", *argv); 109 (void)printf("clearing %d\n", inonum); 110 111 /* read in the appropriate block. */ 112 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 113 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 114 offset *= DEV_BSIZE; /* disk blk to bytes */ 115 116 /* seek and read the block */ 117 if (lseek(fd, offset, SEEK_SET) < 0) 118 err(1, "%s", fs); 119 if (read(fd, ibuf, bsize) != bsize) 120 err(1, "%s", fs); 121 122 /* get the inode within the block. */ 123 ip = &ibuf[ino_to_fsbo(sbp, inonum)]; 124 125 /* clear the inode, and bump the generation count. */ 126 generation = ip->di_gen + 1; 127 memset(ip, 0, sizeof(*ip)); 128 ip->di_gen = generation; 129 130 /* backup and write the block */ 131 if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0) 132 err(1, "%s", fs); 133 if (write(fd, ibuf, bsize) != bsize) 134 err(1, "%s", fs); 135 (void)fsync(fd); 136 } 137 (void)close(fd); 138 exit(0); 139 } 140