Annotation of embedaddon/scan_ffs/scan_ffs.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (c) 1998 Niklas Hallqvist, Tobias Weingartner
! 3: * Copyright (c) 2002, 2003 Robert Watson, Michael Ranner
! 4: * Copyright (c) 2004 Michael Ranner
! 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/ufs/dinode.h>
! 32: #include <ufs/ffs/fs.h>
! 33: #include <unistd.h>
! 34: #include <stdlib.h>
! 35: #include <stdio.h>
! 36: #include <string.h>
! 37: #include <time.h>
! 38: #include <err.h>
! 39: #if 0
! 40: #include <util.h>
! 41: #endif
! 42:
! 43: #if __FreeBSD_version < 500037
! 44: #include "scan_ffs_freebsd5.h"
! 45: #endif
! 46:
! 47: #if __FreeBSD_version >= 500037
! 48: #define SBSIZE SBLOCKSIZE
! 49: #endif
! 50: #define SBCOUNT 64 /* XXX - Should be configurable */
! 51:
! 52: /* Flags to control ourselves... */
! 53: #define FLAG_VERBOSE 1
! 54: #define FLAG_SMART 2
! 55: #define FLAG_LABELS 4
! 56:
! 57: static void usage(void);
! 58:
! 59: static int
! 60: ufsscan(int fd, daddr_t beg, daddr_t end, int flags)
! 61: {
! 62: static char lastmount[MAXMNTLEN];
! 63: static u_int8_t buf[SBSIZE * SBCOUNT];
! 64: struct fs *sb;
! 65: daddr_t blk, lastblk;
! 66: int n;
! 67: int ufs;
! 68:
! 69: lastblk = -1;
! 70: memset(lastmount, 0, MAXMNTLEN);
! 71:
! 72: for (blk = beg; blk <= ((end<0)?blk:end); blk += (SBCOUNT*SBSIZE/512)){
! 73: memset(buf, 0, SBSIZE * SBCOUNT);
! 74: if (lseek(fd, (off_t)blk * 512, SEEK_SET) < 0)
! 75: err(1, "lseek");
! 76: if (read(fd, buf, SBSIZE * SBCOUNT) < 0)
! 77: err(1, "read");
! 78:
! 79: for (n = 0; n < (SBSIZE * SBCOUNT); n += 512){
! 80: ufs = 0;
! 81: sb = (struct fs*)(&buf[n]);
! 82:
! 83: if (sb->fs_magic == FS_UFS1_MAGIC)
! 84: ufs = 1;
! 85: #if __FreeBSD_version >= 500037
! 86: if (sb->fs_magic == FS_UFS2_MAGIC)
! 87: ufs = 2;
! 88: #endif
! 89:
! 90: if (ufs > 0) {
! 91: #if __FreeBSD_version >= 500037
! 92: if (ufs == 1) sb->fs_size = sb->fs_old_size;
! 93: #endif
! 94: if (flags & FLAG_VERBOSE)
! 95: #if __FreeBSD_version >= 500037
! 96: printf("block %lld id %x,%x size %lld\n",
! 97: #else
! 98: printf("block %d id %x,%x size %d\n",
! 99: #endif
! 100: blk + (n/512), sb->fs_id[0],
! 101: sb->fs_id[1], sb->fs_size);
! 102:
! 103: if (((blk+(n/512)) - lastblk) == (SBSIZE*ufs/512)) {
! 104: if (flags & FLAG_LABELS ) {
! 105: #if __FreeBSD_version >= 500037
! 106: printf("X: %lld %lld 4.2BSD %ld %ld %ld # %s\n",
! 107: #else
! 108: printf("X: %d %d 4.2BSD %d %d %d # %s\n",
! 109: #endif
! 110: (daddr_t)((off_t)sb->fs_size *
! 111: sb->fs_fsize / 512),
! 112: blk+(n/(512))-(2*SBSIZE/512)-((ufs-1)*SBLOCK_UFS2/512),
! 113: sb->fs_fsize, sb->fs_bsize,
! 114: #if __FreeBSD_version < 500037
! 115: sb->fs_cpg, lastmount);
! 116: #else
! 117: sb->fs_old_cpg, lastmount);
! 118: #endif
! 119: } else {
! 120: #if __FreeBSD_version >= 500037
! 121: printf("ufs%d at %lld size %lld mount %s time %s\n",
! 122: #else
! 123: printf("ufs%d at %d size %d mount %s time %s\n",
! 124: #endif
! 125: ufs,
! 126: blk+(n/(512))-(2*SBSIZE/512)-((ufs-1)*SBLOCK_UFS2/512),
! 127: sb->fs_size,
! 128: lastmount, ctime((time_t *)&sb->fs_time));
! 129: }
! 130:
! 131: if (flags & FLAG_SMART) {
! 132: off_t size = (off_t)sb->fs_size *
! 133: sb->fs_fsize;
! 134:
! 135: if ((n + size) < (SBSIZE * SBCOUNT))
! 136: n += size;
! 137: else {
! 138: blk += (size/512) - (SBCOUNT * SBCOUNT);
! 139: break;
! 140: }
! 141: }
! 142: }
! 143:
! 144: /* Update last potential FS SBs seen */
! 145: lastblk = blk + (n/512);
! 146: memcpy(lastmount, sb->fs_fsmnt, MAXMNTLEN);
! 147: }
! 148: }
! 149: }
! 150: return(0);
! 151: }
! 152:
! 153:
! 154: static void
! 155: usage(void)
! 156: {
! 157: extern char *__progname;
! 158:
! 159: fprintf(stderr, "usage: %s [-lsv] [-b begin] [-e end] device\n",
! 160: __progname);
! 161: exit(1);
! 162: }
! 163:
! 164:
! 165: int
! 166: main(int argc, char *argv[])
! 167: {
! 168: char *name;
! 169: int ch, fd, flags = 0;
! 170: daddr_t beg = 0, end = -1;
! 171:
! 172: while ((ch = getopt(argc, argv, "lsvb:e:")) != -1)
! 173: switch(ch) {
! 174: case 'b':
! 175: beg = atoi(optarg);
! 176: break;
! 177: case 'e':
! 178: end = atoi(optarg);
! 179: break;
! 180: case 'v':
! 181: flags |= FLAG_VERBOSE;
! 182: break;
! 183: case 's':
! 184: flags |= FLAG_SMART;
! 185: break;
! 186: case 'l':
! 187: flags |= FLAG_LABELS;
! 188: break;
! 189: default:
! 190: usage();
! 191: /* NOTREACHED */
! 192: }
! 193: argc -= optind;
! 194: argv += optind;
! 195:
! 196: if (argc != 1)
! 197: usage();
! 198:
! 199: if (argv[0][0] != '/') {
! 200: if (asprintf(&name, "/dev/%s", argv[0]) == -1)
! 201: err(1, "%s", argv[1]);
! 202: } else
! 203: name = argv[0];
! 204: fd = open(name, O_RDONLY);
! 205: if (fd < 0)
! 206: err(1, "%s", argv[0]);
! 207: if (name != argv[0])
! 208: free(name);
! 209:
! 210: return (ufsscan(fd, beg, end, flags));
! 211: }
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