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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
commitcfe5e3905201349e9cf3f95d52ff4bd100bde37d (patch)
treed0baf160cbee3195249d095f85e52d20c21acf02 /disk-utils/fsck.cramfs.c
parentInitial commit. (diff)
downloadutil-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.tar.xz
util-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.zip
Adding upstream version 2.39.3.upstream/2.39.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'disk-utils/fsck.cramfs.c')
-rw-r--r--disk-utils/fsck.cramfs.c755
1 files changed, 755 insertions, 0 deletions
diff --git a/disk-utils/fsck.cramfs.c b/disk-utils/fsck.cramfs.c
new file mode 100644
index 0000000..5446084
--- /dev/null
+++ b/disk-utils/fsck.cramfs.c
@@ -0,0 +1,755 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * cramfsck - check a cramfs file system
+ *
+ * Copyright (C) 2000-2002 Transmeta Corporation
+ * 2005 Adrian Bunk
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * 1999/12/03: Linus Torvalds (cramfs tester and unarchive program)
+ * 2000/06/03: Daniel Quinlan (CRC and length checking program)
+ * 2000/06/04: Daniel Quinlan (merged programs, added options, support
+ * for special files, preserve permissions and
+ * ownership, cramfs superblock v2, bogus mode
+ * test, pathname length test, etc.)
+ * 2000/06/06: Daniel Quinlan (support for holes, pretty-printing,
+ * symlink size test)
+ * 2000/07/11: Daniel Quinlan (file length tests, start at offset 0 or 512,
+ * fsck-compatible exit codes)
+ * 2000/07/15: Daniel Quinlan (initial support for block devices)
+ * 2002/01/10: Daniel Quinlan (additional checks, test more return codes,
+ * use read if mmap fails, standardize messages)
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <getopt.h>
+#include <fcntl.h>
+
+/* We don't use our include/crc32.h, but crc32 from zlib!
+ *
+ * The zlib implementation performs pre/post-conditioning. The util-linux
+ * imlemenation requires post-conditioning (xor) in the applications.
+ */
+#include <zlib.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "c.h"
+#include "cramfs.h"
+#include "nls.h"
+#include "blkdev.h"
+#include "exitcodes.h"
+#include "strutils.h"
+#include "closestream.h"
+
+#define XALLOC_EXIT_CODE FSCK_EX_ERROR
+#include "xalloc.h"
+
+static int fd; /* ROM image file descriptor */
+static char *filename; /* ROM image filename */
+static struct cramfs_super super; /* just find the cramfs superblock once */
+static int cramfs_is_big_endian = 0; /* source is big endian */
+static int opt_verbose = 0; /* 1 = verbose (-v), 2+ = very verbose (-vv) */
+static int opt_extract = 0; /* extract cramfs (-x) */
+static char *extract_dir = ""; /* optional extraction directory (-x) */
+
+#define PAD_SIZE 512
+
+static uid_t euid; /* effective UID */
+
+/* (cramfs_super + start) <= start_dir < end_dir <= start_data <= end_data */
+static unsigned long start_dir = ~0UL; /* start of first non-root inode */
+static unsigned long end_dir = 0; /* end of the directory structure */
+static unsigned long start_data = ~0UL; /* start of the data (256 MB = max) */
+static unsigned long end_data = 0; /* end of the data */
+
+
+/* Guarantee access to at least 2 * blksize at a time */
+#define CRAMFS_ROMBUFFER_BITS 13
+#define CRAMFS_ROMBUFFERSIZE (1 << CRAMFS_ROMBUFFER_BITS)
+#define CRAMFS_ROMBUFFERMASK (CRAMFS_ROMBUFFERSIZE - 1)
+
+/* Defaults, updated in main() according to block size */
+static size_t rombufbits = CRAMFS_ROMBUFFER_BITS;
+static size_t rombufsize = CRAMFS_ROMBUFFERSIZE;
+static size_t rombufmask = CRAMFS_ROMBUFFERMASK;
+
+static char *read_buffer;
+static unsigned long read_buffer_block = ~0UL;
+
+static z_stream stream;
+
+/* Prototypes */
+static void expand_fs(char *, struct cramfs_inode *);
+
+static char *outbuffer;
+
+static size_t blksize = 0;
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+
+ fputs(USAGE_HEADER, out);
+ fprintf(out,
+ _(" %s [options] <file>\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Check and repair a compressed ROM filesystem.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -a for compatibility only, ignored\n"), out);
+ fputs(_(" -v, --verbose be more verbose\n"), out);
+ fputs(_(" -y for compatibility only, ignored\n"), out);
+ fputs(_(" -b, --blocksize <size> use this blocksize, defaults to page size\n"), out);
+ fputs(_(" --extract[=<dir>] test uncompression, optionally extract into <dir>\n"), out);
+ fputs(USAGE_SEPARATOR, out);
+ printf(USAGE_HELP_OPTIONS(26));
+
+ printf(USAGE_MAN_TAIL("fsck.cramfs(8)"));
+ exit(FSCK_EX_OK);
+}
+
+static int get_superblock_endianness(uint32_t magic)
+{
+ if (magic == CRAMFS_MAGIC) {
+ cramfs_is_big_endian = HOST_IS_BIG_ENDIAN;
+ return 0;
+ }
+
+ if (magic ==
+ u32_toggle_endianness(!HOST_IS_BIG_ENDIAN, CRAMFS_MAGIC)) {
+ cramfs_is_big_endian = !HOST_IS_BIG_ENDIAN;
+ return 0;
+ }
+
+ return -1;
+}
+
+static void test_super(int *start)
+{
+ struct stat st;
+ unsigned long long length;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ err(FSCK_EX_ERROR, _("cannot open %s"), filename);
+
+ /* find the physical size of the file or block device */
+ if (fstat(fd, &st) < 0)
+ err(FSCK_EX_ERROR, _("stat of %s failed"), filename);
+
+ if (S_ISBLK(st.st_mode)) {
+ if (blkdev_get_size(fd, &length))
+ err(FSCK_EX_ERROR,
+ _("ioctl failed: unable to determine device size: %s"),
+ filename);
+ } else if (S_ISREG(st.st_mode))
+ length = st.st_size;
+ else
+ errx(FSCK_EX_ERROR, _("not a block device or file: %s"), filename);
+
+ if (length < sizeof(struct cramfs_super))
+ errx(FSCK_EX_UNCORRECTED, _("file length too short"));
+
+ /* find superblock */
+ if (read(fd, &super, sizeof(super)) != sizeof(super))
+ err(FSCK_EX_ERROR, _("cannot read %s"), filename);
+ if (get_superblock_endianness(super.magic) != -1)
+ *start = 0;
+ else if (length >= (PAD_SIZE + sizeof(super))) {
+ if (lseek(fd, PAD_SIZE, SEEK_SET) == (off_t) -1)
+ err(FSCK_EX_ERROR, _("seek on %s failed"), filename);
+ if (read(fd, &super, sizeof(super)) != sizeof(super))
+ err(FSCK_EX_ERROR, _("cannot read %s"), filename);
+ if (get_superblock_endianness(super.magic) != -1)
+ *start = PAD_SIZE;
+ else
+ errx(FSCK_EX_UNCORRECTED, _("superblock magic not found"));
+ } else
+ errx(FSCK_EX_UNCORRECTED, _("superblock magic not found"));
+
+ if (opt_verbose)
+ printf(_("cramfs endianness is %s\n"),
+ cramfs_is_big_endian ? _("big") : _("little"));
+
+ super_toggle_endianness(cramfs_is_big_endian, &super);
+ if (super.flags & ~CRAMFS_SUPPORTED_FLAGS)
+ errx(FSCK_EX_ERROR, _("unsupported filesystem features"));
+
+ /* What are valid superblock sizes? */
+ if (super.size < *start + sizeof(struct cramfs_super))
+ errx(FSCK_EX_UNCORRECTED, _("superblock size (%d) too small"),
+ super.size);
+
+ if (super.flags & CRAMFS_FLAG_FSID_VERSION_2) {
+ if (super.fsid.files == 0)
+ errx(FSCK_EX_UNCORRECTED, _("zero file count"));
+ if (length < super.size)
+ errx(FSCK_EX_UNCORRECTED, _("file length too short"));
+ else if (length > super.size)
+ warnx(_("file extends past end of filesystem"));
+ } else
+ warnx(_("old cramfs format"));
+}
+
+static void test_crc(int start)
+{
+ void *buf;
+ uint32_t crc;
+
+ if (!(super.flags & CRAMFS_FLAG_FSID_VERSION_2)) {
+ warnx(_("unable to test CRC: old cramfs format"));
+ return;
+ }
+
+ crc = crc32(0L, NULL, 0);
+
+ buf =
+ mmap(NULL, super.size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
+ if (buf == MAP_FAILED) {
+ buf =
+ mmap(NULL, super.size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (buf != MAP_FAILED) {
+ ssize_t tmp;
+ if (lseek(fd, 0, SEEK_SET) == (off_t) -1)
+ err(FSCK_EX_ERROR, _("seek on %s failed"), filename);
+ tmp = read(fd, buf, super.size);
+ if (tmp < 0)
+ err(FSCK_EX_ERROR, _("cannot read %s"), filename);
+ if (tmp != (ssize_t) super.size)
+ errx(FSCK_EX_ERROR, _("failed to read %"PRIu32" bytes from file %s"),
+ super.size, filename);
+ }
+ }
+ if (buf != MAP_FAILED) {
+ ((struct cramfs_super *)((unsigned char *) buf + start))->fsid.crc =
+ crc32(0L, NULL, 0);
+ crc = crc32(crc, (unsigned char *) buf + start, super.size - start);
+ munmap(buf, super.size);
+ } else {
+ int retval;
+ size_t length = 0;
+
+ buf = xmalloc(4096);
+ if (lseek(fd, start, SEEK_SET) == (off_t) -1)
+ err(FSCK_EX_ERROR, _("seek on %s failed"), filename);
+ for (;;) {
+ retval = read(fd, buf, 4096);
+ if (retval < 0)
+ err(FSCK_EX_ERROR, _("cannot read %s"), filename);
+ else if (retval == 0)
+ break;
+ if (length == 0)
+ ((struct cramfs_super *)buf)->fsid.crc =
+ crc32(0L, NULL, 0);
+ length += retval;
+ if (length > (super.size - start)) {
+ crc = crc32(crc, buf,
+ retval - (length -
+ (super.size - start)));
+ break;
+ }
+ crc = crc32(crc, buf, retval);
+ }
+ free(buf);
+ }
+
+ if (crc != super.fsid.crc)
+ errx(FSCK_EX_UNCORRECTED, _("crc error"));
+}
+
+static void print_node(char type, struct cramfs_inode *i, char *name)
+{
+ char info[10];
+
+ if (S_ISCHR(i->mode) || (S_ISBLK(i->mode)))
+ /* major/minor numbers can be as high as 2^12 or 4096 */
+ snprintf(info, 10, "%4d,%4d", major(i->size), minor(i->size));
+ else
+ /* size be as high as 2^24 or 16777216 */
+ snprintf(info, 10, "%9d", i->size);
+
+ printf("%c %04o %s %5d:%-3d %s\n",
+ type, i->mode & ~S_IFMT, info, i->uid, i->gid,
+ !*name && type == 'd' ? "/" : name);
+}
+
+/*
+ * Create a fake "blocked" access
+ */
+static void *romfs_read(unsigned long offset)
+{
+ unsigned int block = offset >> rombufbits;
+ if (block != read_buffer_block) {
+ ssize_t x;
+
+ read_buffer_block = block;
+ if (lseek(fd, block << rombufbits, SEEK_SET) == (off_t) -1)
+ warn(_("seek failed"));
+
+ x = read(fd, read_buffer, rombufsize * 2);
+ if (x < 0)
+ warn(_("read romfs failed"));
+ }
+ return read_buffer + (offset & rombufmask);
+}
+
+static struct cramfs_inode *cramfs_iget(struct cramfs_inode *i)
+{
+ struct cramfs_inode *inode = xmalloc(sizeof(struct cramfs_inode));
+
+ inode_to_host(cramfs_is_big_endian, i, inode);
+ return inode;
+}
+
+static struct cramfs_inode *iget(unsigned int ino)
+{
+ return cramfs_iget(romfs_read(ino));
+}
+
+static void iput(struct cramfs_inode *inode)
+{
+ free(inode);
+}
+
+/*
+ * Return the offset of the root directory
+ */
+static struct cramfs_inode *read_super(void)
+{
+ struct cramfs_inode *root = cramfs_iget(&super.root);
+ unsigned long offset = root->offset << 2;
+
+ if (!S_ISDIR(root->mode))
+ errx(FSCK_EX_UNCORRECTED, _("root inode is not directory"));
+ if (!(super.flags & CRAMFS_FLAG_SHIFTED_ROOT_OFFSET) &&
+ ((offset != sizeof(struct cramfs_super)) &&
+ (offset != PAD_SIZE + sizeof(struct cramfs_super)))) {
+ errx(FSCK_EX_UNCORRECTED, _("bad root offset (%lu)"), offset);
+ }
+ return root;
+}
+
+static int uncompress_block(void *src, size_t len)
+{
+ int err;
+
+ stream.next_in = src;
+ stream.avail_in = len;
+
+ stream.next_out = (unsigned char *)outbuffer;
+ stream.avail_out = blksize * 2;
+
+ inflateReset(&stream);
+
+ if (len > blksize * 2)
+ errx(FSCK_EX_UNCORRECTED, _("data block too large"));
+
+ err = inflate(&stream, Z_FINISH);
+ if (err != Z_STREAM_END)
+ errx(FSCK_EX_UNCORRECTED, _("decompression error: %s"),
+ zError(err));
+ return stream.total_out;
+}
+
+#ifndef HAVE_LCHOWN
+#define lchown chown
+#endif
+
+static void do_uncompress(char *path, int outfd, unsigned long offset,
+ unsigned long size)
+{
+ unsigned long curr = offset + 4 * ((size + blksize - 1) / blksize);
+
+ do {
+ unsigned long out = blksize;
+ unsigned long next = u32_toggle_endianness(cramfs_is_big_endian,
+ *(uint32_t *)
+ romfs_read(offset));
+
+ if (next > end_data)
+ end_data = next;
+
+ offset += 4;
+ if (curr == next) {
+ if (opt_verbose > 1)
+ printf(_(" hole at %lu (%zu)\n"), curr,
+ blksize);
+ if (size < blksize)
+ out = size;
+ memset(outbuffer, 0x00, out);
+ } else {
+ if (opt_verbose > 1)
+ printf(_(" uncompressing block at %lu to %lu (%lu)\n"),
+ curr, next, next - curr);
+ out = uncompress_block(romfs_read(curr), next - curr);
+ }
+ if (size >= blksize) {
+ if (out != blksize)
+ errx(FSCK_EX_UNCORRECTED,
+ _("non-block (%ld) bytes"), out);
+ } else {
+ if (out != size)
+ errx(FSCK_EX_UNCORRECTED,
+ _("non-size (%ld vs %ld) bytes"), out,
+ size);
+ }
+ size -= out;
+ if (*extract_dir != '\0' && write(outfd, outbuffer, out) < 0)
+ err(FSCK_EX_ERROR, _("write failed: %s"), path);
+ curr = next;
+ } while (size);
+}
+static void change_file_status(char *path, struct cramfs_inode *i)
+{
+ const struct timeval epoch[] = { {0,0}, {0,0} };
+
+ if (euid == 0) {
+ if (lchown(path, i->uid, i->gid) < 0)
+ err(FSCK_EX_ERROR, _("lchown failed: %s"), path);
+ if (S_ISLNK(i->mode))
+ return;
+ if (((S_ISUID | S_ISGID) & i->mode) && chmod(path, i->mode) < 0)
+ err(FSCK_EX_ERROR, _("chmod failed: %s"), path);
+ }
+ if (S_ISLNK(i->mode))
+ return;
+ if (utimes(path, epoch) < 0)
+ err(FSCK_EX_ERROR, _("utimes failed: %s"), path);
+}
+
+static int is_dangerous_filename(char *name, int len)
+{
+ return (len == 1 && name[0] == '.') ||
+ (len == 2 && name[0] == '.' && name[1] == '.');
+}
+
+static void __attribute__((__noreturn__))
+ errx_path(const char *mesg, const char *name, size_t namelen)
+{
+ char buf[PATH_MAX] = { 0 };
+
+ namelen = min(namelen, sizeof(buf) - 1);
+ memcpy(buf, name, namelen);
+
+ errx(FSCK_EX_UNCORRECTED, "%s: %s", mesg, buf);
+}
+
+static void do_directory(char *path, struct cramfs_inode *i)
+{
+ int pathlen = strlen(path);
+ int count = i->size;
+ unsigned long offset = i->offset << 2;
+ char *newpath = xmalloc(pathlen + 256);
+
+ if (offset == 0 && count != 0)
+ errx(FSCK_EX_UNCORRECTED,
+ _("directory inode has zero offset and non-zero size: %s"),
+ path);
+
+ if (offset != 0 && offset < start_dir)
+ start_dir = offset;
+
+ /* TODO: Do we need to check end_dir for empty case? */
+ memcpy(newpath, path, pathlen);
+ newpath[pathlen] = '/';
+ pathlen++;
+ if (opt_verbose)
+ print_node('d', i, path);
+
+ if (*extract_dir != '\0') {
+ if (mkdir(path, i->mode) < 0)
+ err(FSCK_EX_ERROR, _("mkdir failed: %s"), path);
+ change_file_status(path, i);
+ }
+ while (count > 0) {
+ struct cramfs_inode *child = iget(offset);
+ char *name;
+ int size;
+ int newlen = child->namelen << 2;
+
+ size = sizeof(struct cramfs_inode) + newlen;
+ count -= size;
+
+ offset += sizeof(struct cramfs_inode);
+ name = romfs_read(offset);
+
+ if (memchr(name, '/', newlen) != NULL)
+ errx_path(_("illegal filename"), name, newlen);
+ if (*extract_dir != '\0' && is_dangerous_filename(name, newlen))
+ errx_path(_("dangerous filename"), name, newlen);
+ memcpy(newpath + pathlen, name, newlen);
+ newpath[pathlen + newlen] = 0;
+ if (newlen == 0)
+ errx(FSCK_EX_UNCORRECTED, _("filename length is zero"));
+ if ((pathlen + newlen) - strlen(newpath) > 3)
+ errx(FSCK_EX_UNCORRECTED, _("bad filename length"));
+ expand_fs(newpath, child);
+
+ offset += newlen;
+
+ if (offset <= start_dir)
+ errx(FSCK_EX_UNCORRECTED, _("bad inode offset"));
+ if (offset > end_dir)
+ end_dir = offset;
+ iput(child); /* free(child) */
+ }
+ free(newpath);
+}
+
+static void do_file(char *path, struct cramfs_inode *i)
+{
+ unsigned long offset = i->offset << 2;
+ int outfd = 0;
+
+ if (offset == 0 && i->size != 0)
+ errx(FSCK_EX_UNCORRECTED,
+ _("file inode has zero offset and non-zero size"));
+ if (i->size == 0 && offset != 0)
+ errx(FSCK_EX_UNCORRECTED,
+ _("file inode has zero size and non-zero offset"));
+ if (offset != 0 && offset < start_data)
+ start_data = offset;
+ if (opt_verbose)
+ print_node('f', i, path);
+ if (*extract_dir != '\0') {
+ outfd = open(path, O_WRONLY | O_CREAT | O_TRUNC, i->mode);
+ if (outfd < 0)
+ err(FSCK_EX_ERROR, _("cannot open %s"), path);
+ }
+ if (i->size)
+ do_uncompress(path, outfd, offset, i->size);
+ if ( *extract_dir != '\0') {
+ if (close_fd(outfd) != 0)
+ err(FSCK_EX_ERROR, _("write failed: %s"), path);
+ change_file_status(path, i);
+ }
+}
+
+static void do_symlink(char *path, struct cramfs_inode *i)
+{
+ unsigned long offset = i->offset << 2;
+ unsigned long curr = offset + 4;
+ unsigned long next =
+ u32_toggle_endianness(cramfs_is_big_endian,
+ *(uint32_t *) romfs_read(offset));
+ unsigned long size;
+
+ if (offset == 0)
+ errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero offset"));
+ if (i->size == 0)
+ errx(FSCK_EX_UNCORRECTED, _("symbolic link has zero size"));
+
+ if (offset < start_data)
+ start_data = offset;
+ if (next > end_data)
+ end_data = next;
+
+ size = uncompress_block(romfs_read(curr), next - curr);
+ if (size != i->size)
+ errx(FSCK_EX_UNCORRECTED, _("size error in symlink: %s"), path);
+ outbuffer[size] = 0;
+ if (opt_verbose) {
+ char *str;
+
+ xasprintf(&str, "%s -> %s", path, outbuffer);
+ print_node('l', i, str);
+ if (opt_verbose > 1)
+ printf(_(" uncompressing block at %lu to %lu (%lu)\n"),
+ curr, next, next - curr);
+ free(str);
+ }
+ if (*extract_dir != '\0') {
+ if (symlink(outbuffer, path) < 0)
+ err(FSCK_EX_ERROR, _("symlink failed: %s"), path);
+ change_file_status(path, i);
+ }
+}
+
+static void do_special_inode(char *path, struct cramfs_inode *i)
+{
+ dev_t devtype = 0;
+ char type;
+
+ if (i->offset)
+ /* no need to shift offset */
+ errx(FSCK_EX_UNCORRECTED,
+ _("special file has non-zero offset: %s"), path);
+
+ if (S_ISCHR(i->mode)) {
+ devtype = i->size;
+ type = 'c';
+ } else if (S_ISBLK(i->mode)) {
+ devtype = i->size;
+ type = 'b';
+ } else if (S_ISFIFO(i->mode)) {
+ if (i->size != 0)
+ errx(FSCK_EX_UNCORRECTED, _("fifo has non-zero size: %s"),
+ path);
+ type = 'p';
+ } else if (S_ISSOCK(i->mode)) {
+ if (i->size != 0)
+ errx(FSCK_EX_UNCORRECTED,
+ _("socket has non-zero size: %s"), path);
+ type = 's';
+ } else {
+ errx(FSCK_EX_UNCORRECTED, _("bogus mode: %s (%o)"), path, i->mode);
+ return; /* not reached */
+ }
+
+ if (opt_verbose)
+ print_node(type, i, path);
+
+ if (*extract_dir != '\0') {
+ if (mknod(path, i->mode, devtype) < 0)
+ err(FSCK_EX_ERROR, _("mknod failed: %s"), path);
+ change_file_status(path, i);
+ }
+}
+
+static void expand_fs(char *path, struct cramfs_inode *inode)
+{
+ if (S_ISDIR(inode->mode))
+ do_directory(path, inode);
+ else if (S_ISREG(inode->mode))
+ do_file(path, inode);
+ else if (S_ISLNK(inode->mode))
+ do_symlink(path, inode);
+ else
+ do_special_inode(path, inode);
+}
+
+static void test_fs(int start)
+{
+ struct cramfs_inode *root;
+
+ root = read_super();
+ umask(0);
+ euid = geteuid();
+ stream.next_in = NULL;
+ stream.avail_in = 0;
+ inflateInit(&stream);
+ expand_fs(extract_dir, root);
+ inflateEnd(&stream);
+ if (start_data != ~0UL) {
+ if (start_data < (sizeof(struct cramfs_super) + start))
+ errx(FSCK_EX_UNCORRECTED,
+ _("directory data start (%lu) < sizeof(struct cramfs_super) + start (%zu)"),
+ start_data, sizeof(struct cramfs_super) + start);
+ if (end_dir != start_data)
+ errx(FSCK_EX_UNCORRECTED,
+ _("directory data end (%lu) != file data start (%lu)"),
+ end_dir, start_data);
+ }
+ if (super.flags & CRAMFS_FLAG_FSID_VERSION_2 && end_data > super.size)
+ errx(FSCK_EX_UNCORRECTED, _("invalid file data offset"));
+
+ iput(root); /* free(root) */
+}
+
+int main(int argc, char **argv)
+{
+ int c; /* for getopt */
+ int start = 0;
+
+ static const struct option longopts[] = {
+ {"verbose", no_argument, NULL, 'v'},
+ {"version", no_argument, NULL, 'V'},
+ {"help", no_argument, NULL, 'h'},
+ {"blocksize", required_argument, NULL, 'b'},
+ {"extract", optional_argument, NULL, 'x'},
+ {NULL, 0, NULL, 0},
+ };
+
+ setlocale(LC_MESSAGES, "");
+ setlocale(LC_CTYPE, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ strutils_set_exitcode(FSCK_EX_USAGE);
+
+ /* command line options */
+ while ((c = getopt_long(argc, argv, "ayvVhb:", longopts, NULL)) != EOF)
+ switch (c) {
+ case 'a': /* ignore */
+ case 'y':
+ break;
+ case 'h':
+ usage();
+ break;
+ case 'V':
+ print_version(FSCK_EX_OK);
+ case 'x':
+ opt_extract = 1;
+ if(optarg)
+ extract_dir = optarg;
+ break;
+ case 'v':
+ opt_verbose++;
+ break;
+ case 'b':
+ blksize = strtou32_or_err(optarg, _("invalid blocksize argument"));
+ break;
+ default:
+ errtryhelp(FSCK_EX_USAGE);
+ }
+
+ if ((argc - optind) != 1){
+ warnx(_("bad usage"));
+ errtryhelp(FSCK_EX_USAGE);
+ }
+ filename = argv[optind];
+
+ test_super(&start);
+ test_crc(start);
+
+ if (opt_extract) {
+ size_t bufsize = 0;
+
+ if (blksize == 0)
+ blksize = getpagesize();
+
+ /* re-calculate according to blksize */
+ bufsize = rombufsize = blksize * 2;
+ rombufbits = 0;
+ while (bufsize >>= 1)
+ rombufbits++;
+ rombufmask = rombufsize - 1;
+
+ outbuffer = xmalloc(blksize * 2);
+ read_buffer = xmalloc(rombufsize * 2);
+ test_fs(start);
+ }
+
+ if (opt_verbose)
+ printf(_("%s: OK\n"), filename);
+
+ exit(FSCK_EX_OK);
+}