/*
* 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.
*/
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE /* for O_LARGEFILE */
+#endif
+
+#include "config.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <utime.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
-#else
+#else
extern int optind;
extern char *optarg;
#endif
-#ifdef HAVE_OPTRESET
-extern int optreset; /* defined by BSD, but not others */
-#endif
#include "debugfs.h"
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
+#endif
+
/*
* The mode_xlate function translates a linux mode into a native-OS mode_t.
*/
{ LINUX_S_IXOTH, S_IXOTH },
{ 0, 0 }
};
-
+
static mode_t mode_xlate(__u16 lmode)
{
mode_t mode = 0;
return mode;
}
-static void dump_file(char *cmdname, ino_t ino, int fd, int preserve,
- char *outname)
+static void fix_perms(const char *cmd, const struct ext2_inode *inode,
+ int fd, const char *name)
+{
+ struct utimbuf ut;
+ int i;
+
+ if (fd != -1)
+ i = fchmod(fd, mode_xlate(inode->i_mode));
+ else
+ i = chmod(name, mode_xlate(inode->i_mode));
+ if (i == -1)
+ com_err(cmd, errno, "while setting permissions of %s", name);
+
+#ifndef HAVE_FCHOWN
+ i = chown(name, inode->i_uid, inode->i_gid);
+#else
+ if (fd != -1)
+ i = fchown(fd, inode->i_uid, inode->i_gid);
+ else
+ i = chown(name, inode->i_uid, inode->i_gid);
+#endif
+ if (i == -1)
+ com_err(cmd, errno, "while changing ownership of %s", name);
+
+ ut.actime = inode->i_atime;
+ ut.modtime = inode->i_mtime;
+ if (utime(name, &ut) == -1)
+ com_err(cmd, errno, "while setting times of %s", name);
+}
+
+static void dump_file(const char *cmdname, ext2_ino_t ino, int fd,
+ int preserve, char *outname)
{
errcode_t retval;
struct ext2_inode inode;
- struct utimbuf ut;
- char buf[8192];
+ char *buf = 0;
ext2_file_t e2_file;
- int nbytes, got;
-
- retval = ext2fs_read_inode(current_fs, ino, &inode);
- if (retval) {
- com_err(cmdname, retval,
- "while reading inode %u in dump_file", ino);
+ int nbytes;
+ unsigned int got, blocksize = current_fs->blocksize;
+
+ if (debugfs_read_inode(ino, &inode, cmdname))
return;
- }
retval = ext2fs_file_open(current_fs, ino, 0, &e2_file);
if (retval) {
com_err(cmdname, retval, "while opening ext2 file");
return;
}
+ retval = ext2fs_get_mem(blocksize, &buf);
+ if (retval) {
+ com_err(cmdname, retval, "while allocating memory");
+ return;
+ }
while (1) {
- retval = ext2fs_file_read(e2_file, buf, sizeof(buf), &got);
- if (retval)
+ retval = ext2fs_file_read(e2_file, buf, blocksize, &got);
+ if (retval)
com_err(cmdname, retval, "while reading ext2 file");
if (got == 0)
break;
nbytes = write(fd, buf, got);
- if (nbytes != got)
+ if ((unsigned) nbytes != got)
com_err(cmdname, errno, "while writing file");
}
+ if (buf)
+ ext2fs_free_mem(&buf);
retval = ext2fs_file_close(e2_file);
if (retval) {
com_err(cmdname, retval, "while closing ext2 file");
return;
}
-
- 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);
-
+
+ if (preserve)
+ fix_perms("dump_file", &inode, fd, outname);
+
return;
}
-void do_dump(int argc, char **argv)
+void do_dump(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
{
- ino_t inode;
- int fd;
- int c;
- 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
+ ext2_ino_t inode;
+ int fd;
+ int c;
+ int preserve = 0;
+ char *in_fn, *out_fn;
+
+ reset_getopt();
while ((c = getopt (argc, argv, "p")) != EOF) {
switch (c) {
case 'p':
preserve++;
break;
default:
- com_err(argv[0], 0, dump_usage);
+ print_usage:
+ com_err(argv[0], 0, "Usage: dump_inode [-p] "
+ "<file> <output_file>");
return;
}
}
- if (optind != argc-2) {
- com_err(argv[0], 0, dump_usage);
- return;
- }
+ if (optind != argc-2)
+ goto print_usage;
if (check_fs_open(argv[0]))
return;
out_fn = argv[optind+1];
inode = string_to_inode(in_fn);
- if (!inode)
+ if (!inode)
return;
- fd = open(out_fn, O_CREAT | O_WRONLY | O_TRUNC, 0666);
+ fd = open(out_fn, O_CREAT | O_WRONLY | O_TRUNC | O_LARGEFILE, 0666);
if (fd < 0) {
com_err(argv[0], errno, "while opening %s for dump_inode",
out_fn);
}
dump_file(argv[0], inode, fd, preserve, out_fn);
+ if (close(fd) != 0) {
+ com_err(argv[0], errno, "while closing %s for dump_inode",
+ out_fn);
+ return;
+ }
return;
}
-void do_cat(int argc, char **argv)
+static void rdump_symlink(ext2_ino_t ino, struct ext2_inode *inode,
+ const char *fullname)
{
- ino_t inode;
+ ext2_file_t e2_file;
+ char *buf;
+ errcode_t retval;
+
+ buf = malloc(inode->i_size + 1);
+ if (!buf) {
+ com_err("rdump", errno, "while allocating for symlink");
+ goto errout;
+ }
+
+ if (ext2fs_is_fast_symlink(inode))
+ strcpy(buf, (char *) inode->i_block);
+ else {
+ unsigned bytes = inode->i_size;
+ char *p = buf;
+ retval = ext2fs_file_open(current_fs, ino, 0, &e2_file);
+ if (retval) {
+ com_err("rdump", retval, "while opening symlink");
+ goto errout;
+ }
+ for (;;) {
+ unsigned int got;
+ retval = ext2fs_file_read(e2_file, p, bytes, &got);
+ if (retval) {
+ com_err("rdump", retval, "while reading symlink");
+ goto errout;
+ }
+ bytes -= got;
+ p += got;
+ if (got == 0 || bytes == 0)
+ break;
+ }
+ buf[inode->i_size] = 0;
+ retval = ext2fs_file_close(e2_file);
+ if (retval)
+ com_err("rdump", retval, "while closing symlink");
+ }
+
+ if (symlink(buf, fullname) == -1) {
+ com_err("rdump", errno, "while creating symlink %s -> %s", buf, fullname);
+ goto errout;
+ }
- if (argc != 2) {
- com_err(argv[0], 0, "Usage: cat <file>");
+errout:
+ free(buf);
+}
+
+static int rdump_dirent(struct ext2_dir_entry *, int, int, char *, void *);
+
+static void rdump_inode(ext2_ino_t ino, struct ext2_inode *inode,
+ const char *name, const char *dumproot)
+{
+ char *fullname;
+
+ /* There are more efficient ways to do this, but this method
+ * requires only minimal debugging. */
+ fullname = malloc(strlen(dumproot) + strlen(name) + 2);
+ if (!fullname) {
+ com_err("rdump", errno, "while allocating memory");
return;
}
+ sprintf(fullname, "%s/%s", dumproot, name);
- if (check_fs_open(argv[0]))
+ if (LINUX_S_ISLNK(inode->i_mode))
+ rdump_symlink(ino, inode, fullname);
+ else if (LINUX_S_ISREG(inode->i_mode)) {
+ int fd;
+ fd = open(fullname, O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE, S_IRWXU);
+ if (fd == -1) {
+ com_err("rdump", errno, "while opening %s", fullname);
+ goto errout;
+ }
+ dump_file("rdump", ino, fd, 1, fullname);
+ if (close(fd) != 0) {
+ com_err("rdump", errno, "while closing %s", fullname);
+ goto errout;
+ }
+ }
+ else if (LINUX_S_ISDIR(inode->i_mode) && strcmp(name, ".") && strcmp(name, "..")) {
+ errcode_t retval;
+
+ /* Create the directory with 0700 permissions, because we
+ * expect to have to create entries it. Then fix its perms
+ * once we've done the traversal. */
+ if (name[0] && mkdir(fullname, S_IRWXU) == -1) {
+ com_err("rdump", errno, "while making directory %s", fullname);
+ goto errout;
+ }
+
+ retval = ext2fs_dir_iterate(current_fs, ino, 0, 0,
+ rdump_dirent, (void *) fullname);
+ if (retval)
+ com_err("rdump", retval, "while dumping %s", fullname);
+
+ fix_perms("rdump", inode, -1, fullname);
+ }
+ /* else do nothing (don't dump device files, sockets, fifos, etc.) */
+
+errout:
+ free(fullname);
+}
+
+static int rdump_dirent(struct ext2_dir_entry *dirent,
+ int offset EXT2FS_ATTR((unused)),
+ int blocksize EXT2FS_ATTR((unused)),
+ char *buf EXT2FS_ATTR((unused)), void *private)
+{
+ char name[EXT2_NAME_LEN + 1];
+ int thislen;
+ const char *dumproot = private;
+ struct ext2_inode inode;
+
+ thislen = ext2fs_dirent_name_len(dirent);
+ strncpy(name, dirent->name, thislen);
+ name[thislen] = 0;
+
+ if (debugfs_read_inode(dirent->inode, &inode, name))
+ return 0;
+
+ rdump_inode(dirent->inode, &inode, name, dumproot);
+
+ return 0;
+}
+
+void do_rdump(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ struct stat st;
+ char *dest_dir;
+ int i;
+
+ if (common_args_process(argc, argv, 3, INT_MAX, "rdump",
+ "<directory>... <native directory>", 0))
+ return;
+
+ /* Pull out last argument */
+ dest_dir = argv[argc - 1];
+ argc--;
+
+ /* Ensure last arg is a directory. */
+ if (stat(dest_dir, &st) == -1) {
+ com_err("rdump", errno, "while statting %s", dest_dir);
+ return;
+ }
+ if (!S_ISDIR(st.st_mode)) {
+ com_err("rdump", 0, "%s is not a directory", dest_dir);
return;
+ }
+
+ for (i = 1; i < argc; i++) {
+ char *arg = argv[i], *basename;
+ struct ext2_inode inode;
+ ext2_ino_t ino = string_to_inode(arg);
+ if (!ino)
+ continue;
+
+ if (debugfs_read_inode(ino, &inode, arg))
+ continue;
+
+ basename = strrchr(arg, '/');
+ if (basename)
+ basename++;
+ else
+ basename = arg;
+
+ rdump_inode(ino, &inode, basename, dest_dir);
+ }
+}
+
+void do_cat(int argc, char **argv, int sci_idx EXT2FS_ATTR((unused)),
+ void *infop EXT2FS_ATTR((unused)))
+{
+ ext2_ino_t inode;
- inode = string_to_inode(argv[1]);
- if (!inode)
+ if (common_inode_args_process(argc, argv, &inode, 0))
return;
fflush(stdout);
fflush(stderr);
- dump_file(argv[0], inode, 1, 0, argv[2]);
+ dump_file(argv[0], inode, 1, 0, argv[2]);
return;
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff