1997-04-26 17:34:30 +04:00
|
|
|
/*
|
|
|
|
* dump.c --- dump the contents of an inode out to a file
|
|
|
|
*
|
|
|
|
* Copyright (C) 1994 Theodore Ts'o. This file may be redistributed
|
|
|
|
* under the terms of the GNU Public License.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <ctype.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <time.h>
|
1997-04-26 17:58:21 +04:00
|
|
|
#ifdef HAVE_ERRNO_H
|
|
|
|
#include <errno.h>
|
|
|
|
#endif
|
1997-04-26 17:34:30 +04:00
|
|
|
#include <sys/types.h>
|
|
|
|
#include <sys/stat.h>
|
|
|
|
#include <fcntl.h>
|
1997-04-29 18:51:31 +04:00
|
|
|
#include <utime.h>
|
|
|
|
#ifdef HAVE_GETOPT_H
|
|
|
|
#include <getopt.h>
|
|
|
|
#else
|
|
|
|
extern int optind;
|
|
|
|
extern char *optarg;
|
|
|
|
#endif
|
|
|
|
#ifdef HAVE_OPTRESET
|
|
|
|
extern int optreset; /* defined by BSD, but not others */
|
|
|
|
#endif
|
1997-04-26 17:34:30 +04:00
|
|
|
|
|
|
|
#include "debugfs.h"
|
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
/*
|
|
|
|
* The mode_xlate function translates a linux mode into a native-OS mode_t.
|
|
|
|
*/
|
|
|
|
static struct {
|
|
|
|
__u16 lmask;
|
|
|
|
mode_t mask;
|
|
|
|
} mode_table[] = {
|
|
|
|
{ LINUX_S_IRUSR, S_IRUSR },
|
|
|
|
{ LINUX_S_IWUSR, S_IWUSR },
|
|
|
|
{ LINUX_S_IXUSR, S_IXUSR },
|
|
|
|
{ LINUX_S_IRGRP, S_IRGRP },
|
|
|
|
{ LINUX_S_IWGRP, S_IWGRP },
|
|
|
|
{ LINUX_S_IXGRP, S_IXGRP },
|
|
|
|
{ LINUX_S_IROTH, S_IROTH },
|
|
|
|
{ LINUX_S_IWOTH, S_IWOTH },
|
|
|
|
{ LINUX_S_IXOTH, S_IXOTH },
|
|
|
|
{ 0, 0 }
|
|
|
|
};
|
|
|
|
|
|
|
|
static mode_t mode_xlate(__u16 lmode)
|
|
|
|
{
|
|
|
|
mode_t mode = 0;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i=0; mode_table[i].lmask; i++) {
|
|
|
|
if (lmode & mode_table[i].lmask)
|
|
|
|
mode |= mode_table[i].mask;
|
|
|
|
}
|
|
|
|
return mode;
|
|
|
|
}
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
struct dump_block_struct {
|
|
|
|
int fd;
|
|
|
|
char *buf;
|
1997-04-29 18:51:31 +04:00
|
|
|
int left;
|
1997-04-26 17:34:30 +04:00
|
|
|
errcode_t errcode;
|
|
|
|
};
|
|
|
|
|
1997-04-26 17:58:21 +04:00
|
|
|
static int dump_block(ext2_filsys fs, blk_t *blocknr, int blockcnt,
|
|
|
|
void *private)
|
1997-04-26 17:34:30 +04:00
|
|
|
{
|
1997-04-29 18:51:31 +04:00
|
|
|
int nbytes, left;
|
|
|
|
off_t ret_off;
|
1997-04-26 17:34:30 +04:00
|
|
|
|
|
|
|
struct dump_block_struct *rec = (struct dump_block_struct *) private;
|
|
|
|
|
|
|
|
if (blockcnt < 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (*blocknr) {
|
|
|
|
rec->errcode = io_channel_read_blk(fs->io, *blocknr,
|
|
|
|
1, rec->buf);
|
|
|
|
if (rec->errcode)
|
|
|
|
return BLOCK_ABORT;
|
1997-04-29 18:51:31 +04:00
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* OK, the file has a hole. Let's try to seek past
|
|
|
|
* the hole in the destination file, so that the
|
|
|
|
* destination file has a hole too.
|
|
|
|
*/
|
|
|
|
ret_off = lseek(rec->fd, fs->blocksize, SEEK_CUR);
|
|
|
|
if (ret_off >= 0)
|
|
|
|
return 0;
|
1997-04-26 17:34:30 +04:00
|
|
|
memset(rec->buf, 0, fs->blocksize);
|
1997-04-29 18:51:31 +04:00
|
|
|
}
|
1997-04-26 17:34:30 +04:00
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
left = (rec->left > fs->blocksize) ? fs->blocksize : rec->left;
|
|
|
|
rec->left -= left;
|
|
|
|
|
|
|
|
while (left > 0) {
|
|
|
|
nbytes = write(rec->fd, rec->buf, left);
|
|
|
|
if (nbytes == -1) {
|
|
|
|
if (errno == EINTR)
|
|
|
|
continue;
|
|
|
|
rec->errcode = errno;
|
|
|
|
return BLOCK_ABORT;
|
|
|
|
}
|
|
|
|
left -= nbytes;
|
1997-04-26 17:34:30 +04:00
|
|
|
}
|
1997-04-29 18:51:31 +04:00
|
|
|
if (rec->left <= 0)
|
1997-04-26 17:34:30 +04:00
|
|
|
return BLOCK_ABORT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
static void dump_file(char *cmdname, ino_t ino, int fd, int preserve,
|
|
|
|
char *outname)
|
1997-04-26 17:34:30 +04:00
|
|
|
{
|
|
|
|
errcode_t retval;
|
|
|
|
struct dump_block_struct rec;
|
1997-04-29 18:51:31 +04:00
|
|
|
struct ext2_inode inode;
|
|
|
|
struct utimbuf ut;
|
|
|
|
|
|
|
|
retval = ext2fs_read_inode(current_fs, ino, &inode);
|
|
|
|
if (retval) {
|
|
|
|
com_err(cmdname, retval,
|
|
|
|
"while reading inode %u in dump_file", ino);
|
|
|
|
return;
|
|
|
|
}
|
1997-04-26 17:34:30 +04:00
|
|
|
|
|
|
|
rec.fd = fd;
|
|
|
|
rec.errcode = 0;
|
1997-04-29 18:51:31 +04:00
|
|
|
rec.buf = malloc(current_fs->blocksize);
|
|
|
|
rec.left = inode.i_size;
|
1997-04-26 17:34:30 +04:00
|
|
|
|
|
|
|
if (rec.buf == 0) {
|
1997-04-29 18:51:31 +04:00
|
|
|
com_err(cmdname, ENOMEM,
|
|
|
|
"while allocating block buffer for dump_inode");
|
1997-04-26 17:34:30 +04:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
retval = ext2fs_block_iterate(current_fs, ino,
|
|
|
|
BLOCK_FLAG_HOLE|BLOCK_FLAG_DATA_ONLY,
|
|
|
|
NULL, dump_block, &rec);
|
1997-04-26 17:34:30 +04:00
|
|
|
if (retval) {
|
|
|
|
com_err(cmdname, retval, "while iterating over blocks in %s",
|
|
|
|
outname);
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
if (rec.errcode) {
|
|
|
|
com_err(cmdname, retval, "in dump_block while dumping %s",
|
|
|
|
outname);
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
cleanup:
|
1997-04-29 18:51:31 +04:00
|
|
|
if (preserve) {
|
|
|
|
#ifdef HAVE_FCHOWN
|
|
|
|
if (fchown(fd, inode.i_uid, inode.i_gid) < 0)
|
|
|
|
com_err("dump_file", errno,
|
|
|
|
"while changing ownership of %s", outname);
|
|
|
|
#else
|
|
|
|
if (chown(outname, inode.i_uid, inode.i_gid) < 0)
|
|
|
|
com_err("dump_file", errno,
|
|
|
|
"while changing ownership of %s", outname);
|
|
|
|
|
|
|
|
#endif
|
|
|
|
if (fchmod(fd, mode_xlate(inode.i_mode)) < 0)
|
|
|
|
com_err("dump_file", errno,
|
|
|
|
"while setting permissions of %s", outname);
|
|
|
|
ut.actime = inode.i_atime;
|
|
|
|
ut.modtime = inode.i_mtime;
|
|
|
|
close(fd);
|
|
|
|
if (utime(outname, &ut) < 0)
|
|
|
|
com_err("dump_file", errno,
|
|
|
|
"while setting times on %s", outname);
|
|
|
|
} else if (fd != 1)
|
|
|
|
close(fd);
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
free(rec.buf);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
void do_dump(int argc, char **argv)
|
|
|
|
{
|
|
|
|
ino_t inode;
|
|
|
|
int fd;
|
1997-10-25 07:51:53 +04:00
|
|
|
int c;
|
1997-04-29 18:51:31 +04:00
|
|
|
int preserve = 0;
|
|
|
|
const char *dump_usage = "Usage: dump_inode [-p] <file> <output_file>";
|
|
|
|
char *in_fn, *out_fn;
|
|
|
|
|
|
|
|
optind = 0;
|
|
|
|
#ifdef HAVE_OPTRESET
|
|
|
|
optreset = 1; /* Makes BSD getopt happy */
|
|
|
|
#endif
|
|
|
|
while ((c = getopt (argc, argv, "p")) != EOF) {
|
|
|
|
switch (c) {
|
|
|
|
case 'p':
|
|
|
|
preserve++;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
com_err(argv[0], 0, dump_usage);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (optind != argc-2) {
|
|
|
|
com_err(argv[0], 0, dump_usage);
|
1997-04-26 17:34:30 +04:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (check_fs_open(argv[0]))
|
|
|
|
return;
|
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
in_fn = argv[optind];
|
|
|
|
out_fn = argv[optind+1];
|
|
|
|
|
|
|
|
inode = string_to_inode(in_fn);
|
1997-04-26 17:34:30 +04:00
|
|
|
if (!inode)
|
|
|
|
return;
|
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
fd = open(out_fn, O_CREAT | O_WRONLY | O_TRUNC, 0666);
|
1997-04-26 17:34:30 +04:00
|
|
|
if (fd < 0) {
|
|
|
|
com_err(argv[0], errno, "while opening %s for dump_inode",
|
1997-04-29 18:51:31 +04:00
|
|
|
out_fn);
|
1997-04-26 17:34:30 +04:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
dump_file(argv[0], inode, fd, preserve, out_fn);
|
1997-04-26 17:34:30 +04:00
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
void do_cat(int argc, char **argv)
|
|
|
|
{
|
|
|
|
ino_t inode;
|
|
|
|
|
|
|
|
if (argc != 2) {
|
|
|
|
com_err(argv[0], 0, "Usage: cat <file>");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (check_fs_open(argv[0]))
|
|
|
|
return;
|
|
|
|
|
|
|
|
inode = string_to_inode(argv[1]);
|
|
|
|
if (!inode)
|
|
|
|
return;
|
|
|
|
|
1997-04-29 18:51:31 +04:00
|
|
|
fflush(stdout);
|
|
|
|
fflush(stderr);
|
|
|
|
dump_file(argv[0], inode, 1, 0, argv[2]);
|
1997-04-26 17:34:30 +04:00
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|