dump.c revision 4a31c48b827f378f386b28461fd14b41d709e4eb
1f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o/* 2f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o * dump.c --- dump the contents of an inode out to a file 3f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o * 4f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed 5f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o * under the terms of the GNU Public License. 6f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o */ 7f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 8f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <stdio.h> 9f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <unistd.h> 10f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <stdlib.h> 11f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <ctype.h> 12f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <string.h> 13f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <time.h> 1450e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#ifdef HAVE_ERRNO_H 1550e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#include <errno.h> 1650e1e10fa0ac12a3e2a9d20a75ee9041873cda96Theodore Ts'o#endif 17f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <sys/types.h> 18f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <sys/stat.h> 19f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include <fcntl.h> 20fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#include <utime.h> 21fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#ifdef HAVE_GETOPT_H 22fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#include <getopt.h> 23fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#else 24fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'oextern int optind; 25fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'oextern char *optarg; 26fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#endif 27fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#ifdef HAVE_OPTRESET 28fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'oextern int optreset; /* defined by BSD, but not others */ 29fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#endif 30f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 31f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o#include "debugfs.h" 32f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 33fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o/* 34fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o * The mode_xlate function translates a linux mode into a native-OS mode_t. 35fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o */ 36fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'ostatic struct { 37fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o __u16 lmask; 38fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o mode_t mask; 39fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o} mode_table[] = { 40fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IRUSR, S_IRUSR }, 41fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IWUSR, S_IWUSR }, 42fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IXUSR, S_IXUSR }, 43fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IRGRP, S_IRGRP }, 44fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IWGRP, S_IWGRP }, 45fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IXGRP, S_IXGRP }, 46fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IROTH, S_IROTH }, 47fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IWOTH, S_IWOTH }, 48fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { LINUX_S_IXOTH, S_IXOTH }, 49fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o { 0, 0 } 50fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o}; 51fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o 52fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'ostatic mode_t mode_xlate(__u16 lmode) 53fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o{ 54fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o mode_t mode = 0; 55fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o int i; 56fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o 57fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o for (i=0; mode_table[i].lmask; i++) { 58fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (lmode & mode_table[i].lmask) 59fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o mode |= mode_table[i].mask; 60fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o } 61fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o return mode; 62fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o} 63fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o 64fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'ostatic void dump_file(char *cmdname, ino_t ino, int fd, int preserve, 65fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o char *outname) 66f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o{ 67f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o errcode_t retval; 68fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o struct ext2_inode inode; 69fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o struct utimbuf ut; 705a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o char buf[8192]; 715a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o ext2_file_t e2_file; 724a31c48b827f378f386b28461fd14b41d709e4ebTheodore Ts'o int nbytes; 734a31c48b827f378f386b28461fd14b41d709e4ebTheodore Ts'o unsigned int got; 745a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o 75fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o retval = ext2fs_read_inode(current_fs, ino, &inode); 76fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (retval) { 77fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o com_err(cmdname, retval, 78fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o "while reading inode %u in dump_file", ino); 79fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o return; 80fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o } 81f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 825a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o retval = ext2fs_file_open(current_fs, ino, 0, &e2_file); 835a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o if (retval) { 845a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o com_err(cmdname, retval, "while opening ext2 file"); 85f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 86f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o } 875a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o while (1) { 885a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o retval = ext2fs_file_read(e2_file, buf, sizeof(buf), &got); 895a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o if (retval) 905a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o com_err(cmdname, retval, "while reading ext2 file"); 915a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o if (got == 0) 925a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o break; 935a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o nbytes = write(fd, buf, got); 945a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o if (nbytes != got) 955a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o com_err(cmdname, errno, "while writing file"); 96f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o } 975a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o retval = ext2fs_file_close(e2_file); 985a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o if (retval) { 995a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o com_err(cmdname, retval, "while closing ext2 file"); 1005a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o return; 101f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o } 1025a51384ef2cdcb2d49965c841ff558afc1f4ee01Theodore Ts'o 103fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (preserve) { 104fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#ifdef HAVE_FCHOWN 105fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (fchown(fd, inode.i_uid, inode.i_gid) < 0) 106fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o com_err("dump_file", errno, 107fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o "while changing ownership of %s", outname); 108fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#else 109fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (chown(outname, inode.i_uid, inode.i_gid) < 0) 110fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o com_err("dump_file", errno, 111fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o "while changing ownership of %s", outname); 112fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o 113fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#endif 114fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (fchmod(fd, mode_xlate(inode.i_mode)) < 0) 115fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o com_err("dump_file", errno, 116fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o "while setting permissions of %s", outname); 117fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o ut.actime = inode.i_atime; 118fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o ut.modtime = inode.i_mtime; 119fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o close(fd); 120fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (utime(outname, &ut) < 0) 121fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o com_err("dump_file", errno, 122fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o "while setting times on %s", outname); 123fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o } else if (fd != 1) 124fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o close(fd); 125fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o 126f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 127f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o} 128f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 129f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'ovoid do_dump(int argc, char **argv) 130f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o{ 131f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o ino_t inode; 132f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o int fd; 133f13048113f09def05a024470bfeaf44635bf7e98Theodore Ts'o int c; 134fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o int preserve = 0; 135fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o const char *dump_usage = "Usage: dump_inode [-p] <file> <output_file>"; 136fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o char *in_fn, *out_fn; 137fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o 138fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o optind = 0; 139fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#ifdef HAVE_OPTRESET 140fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o optreset = 1; /* Makes BSD getopt happy */ 141fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o#endif 142fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o while ((c = getopt (argc, argv, "p")) != EOF) { 143fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o switch (c) { 144fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o case 'p': 145fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o preserve++; 146fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o break; 147fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o default: 148fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o com_err(argv[0], 0, dump_usage); 149fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o return; 150fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o } 151fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o } 152fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o if (optind != argc-2) { 153fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o com_err(argv[0], 0, dump_usage); 154f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 155f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o } 156f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 157f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o if (check_fs_open(argv[0])) 158f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 159f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 160fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o in_fn = argv[optind]; 161fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o out_fn = argv[optind+1]; 162fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o 163fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o inode = string_to_inode(in_fn); 164f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o if (!inode) 165f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 166f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 167fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o fd = open(out_fn, O_CREAT | O_WRONLY | O_TRUNC, 0666); 168f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o if (fd < 0) { 169f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o com_err(argv[0], errno, "while opening %s for dump_inode", 170fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o out_fn); 171f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 172f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o } 173f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 174fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o dump_file(argv[0], inode, fd, preserve, out_fn); 175f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 176f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 177f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o} 178f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 179f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'ovoid do_cat(int argc, char **argv) 180f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o{ 181f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o ino_t inode; 182f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 183f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o if (argc != 2) { 184f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o com_err(argv[0], 0, "Usage: cat <file>"); 185f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 186f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o } 187f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 188f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o if (check_fs_open(argv[0])) 189f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 190f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 191f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o inode = string_to_inode(argv[1]); 192f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o if (!inode) 193f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 194f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 195fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o fflush(stdout); 196fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o fflush(stderr); 197fc6d9d519aef67735918bf02c0fa8c9222008f76Theodore Ts'o dump_file(argv[0], inode, 1, 0, argv[2]); 198f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 199f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o return; 200f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o} 201f3db3566b5e1342e49dffc5ec3f418a838584194Theodore Ts'o 202