1 /* $OpenBSD: scan_ffs.c,v 1.10 2003/07/02 21:44:58 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1998 Niklas Hallqvist, Tobias Weingartner 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/param.h> 30 #include <sys/fcntl.h> 31 #include <ufs/ffs/fs.h> 32 #include <unistd.h> 33 #include <stdlib.h> 34 #include <stdio.h> 35 #include <string.h> 36 #include <time.h> 37 #include <err.h> 38 #include <util.h> 39 40 #define SBCOUNT 64 /* XXX - Should be configurable */ 41 42 /* Flags to control ourselves... */ 43 #define FLAG_VERBOSE 1 44 #define FLAG_SMART 2 45 #define FLAG_LABELS 4 46 47 static int 48 ufsscan(int fd, daddr_t beg, daddr_t end, int flags) 49 { 50 static char lastmount[MAXMNTLEN]; 51 static u_int8_t buf[SBSIZE * SBCOUNT]; 52 struct fs *sb; 53 daddr_t blk, lastblk; 54 int n; 55 56 lastblk = -1; 57 memset(lastmount, 0, MAXMNTLEN); 58 59 for (blk = beg; blk <= ((end<0)?blk:end); blk += (SBCOUNT*SBSIZE/512)){ 60 memset(buf, 0, SBSIZE * SBCOUNT); 61 if (lseek(fd, (off_t)blk * 512, SEEK_SET) < 0) 62 err(1, "lseek"); 63 if (read(fd, buf, SBSIZE * SBCOUNT) < 0) 64 err(1, "read"); 65 66 for (n = 0; n < (SBSIZE * SBCOUNT); n += 512){ 67 sb = (struct fs*)(&buf[n]); 68 if (sb->fs_magic == FS_MAGIC) { 69 if (flags & FLAG_VERBOSE) 70 printf("block %d id %x,%x size %d\n", 71 blk + (n/512), sb->fs_id[0], 72 sb->fs_id[1], sb->fs_size); 73 74 if (((blk+(n/512)) - lastblk) == (SBSIZE/512)) { 75 if (flags & FLAG_LABELS ) { 76 printf("X: %d %d 4.2BSD %d %d %d # %s\n", 77 (daddr_t)((off_t)sb->fs_size * 78 sb->fs_fsize / 512), 79 blk+(n/512)-(2*SBSIZE/512), 80 sb->fs_fsize, sb->fs_bsize, 81 sb->fs_cpg, lastmount); 82 } else { 83 printf("ffs at %d size %lld " 84 "mount %s time %s", 85 blk+(n/512)-(2*SBSIZE/512), 86 (long long)(off_t)sb->fs_size * 87 sb->fs_fsize, 88 lastmount, ctime(&sb->fs_time)); 89 } 90 91 if (flags & FLAG_SMART) { 92 off_t size = (off_t)sb->fs_size * 93 sb->fs_fsize; 94 95 if ((n + size) < (SBSIZE * SBCOUNT)) 96 n += size; 97 else { 98 blk += (size/512 - 99 (SBCOUNT*SBCOUNT)); 100 break; 101 } 102 } 103 } 104 105 /* Update last potential FS SBs seen */ 106 lastblk = blk + (n/512); 107 memcpy(lastmount, sb->fs_fsmnt, MAXMNTLEN); 108 } 109 } 110 } 111 return(0); 112 } 113 114 115 static void 116 usage(int code) 117 { 118 extern char *__progname; 119 120 fprintf(stderr, "usage: %s [-lsv] [-b begin] [-e end] device\n", 121 __progname); 122 exit(code); 123 } 124 125 126 int 127 main(int argc, char *argv[]) 128 { 129 int ch, fd, flags = 0; 130 daddr_t beg = 0, end = -1; 131 132 while ((ch = getopt(argc, argv, "lsvb:e:")) != -1) 133 switch(ch) { 134 case 'b': 135 beg = atoi(optarg); 136 break; 137 case 'e': 138 end = atoi(optarg); 139 break; 140 case 'v': 141 flags |= FLAG_VERBOSE; 142 break; 143 case 's': 144 flags |= FLAG_SMART; 145 break; 146 case 'l': 147 flags |= FLAG_LABELS; 148 break; 149 default: 150 usage(1); 151 /* NOTREACHED */ 152 } 153 argc -= optind; 154 argv += optind; 155 156 if (argc != 1) 157 usage(1); 158 159 fd = opendev(argv[0], O_RDONLY, OPENDEV_PART, NULL); 160 if (fd < 0) 161 err(1, "%s", argv[1]); 162 163 return (ufsscan(fd, beg, end, flags)); 164 } 165