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-rw-r--r--unpack/unsquashfs.c289
1 files changed, 0 insertions, 289 deletions
diff --git a/unpack/unsquashfs.c b/unpack/unsquashfs.c
deleted file mode 100644
index 8ec1b94..0000000
--- a/unpack/unsquashfs.c
+++ /dev/null
@@ -1,289 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-#include "unsquashfs.h"
-
-enum {
- OP_NONE = 0,
- OP_LS,
- OP_CAT,
- OP_UNPACK,
-};
-
-static struct option long_opts[] = {
- { "list", required_argument, NULL, 'l' },
- { "cat", required_argument, NULL, 'c' },
- { "unpack-root", required_argument, NULL, 'u' },
- { "no-dev", no_argument, NULL, 'D' },
- { "no-sock", no_argument, NULL, 'S' },
- { "no-fifo", no_argument, NULL, 'F' },
- { "no-slink", no_argument, NULL, 'L' },
- { "no-empty-dir", no_argument, NULL, 'E' },
- { "chmod", no_argument, NULL, 'C' },
- { "chown", no_argument, NULL, 'O' },
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, 'V' },
-};
-
-static const char *short_opts = "l:c:u:DSFLCOEhV";
-
-static const char *help_string =
-"Usage: %s [OPTIONS] <squashfs-file>\n"
-"\n"
-"View or extract the contents of a squashfs image.\n"
-"\n"
-"Possible options:\n"
-" --list, -l <path> Produce a directory listing for a given path in the\n"
-" squashfs image.\n"
-" --cat, -c <path> If the specified path is a regular file in the,\n"
-" image, dump its contents to stdout.\n"
-" --unpack-root <path> Unpack the contents of the filesystem into the\n"
-" specified path.\n"
-" --no-dev, -D Do not unpack device special files.\n"
-" --no-sock, -S Do not unpack socket files.\n"
-" --no-fifo, -F Do not unpack named pipes.\n"
-" --no-slink, -L Do not unpack symbolic links.\n"
-" --no-empty-dir, -E Do not unpack directories that would end up empty.\n"
-" --chmod, -C Change permission flags of unpacked files to those\n"
-" store in the squashfs image.\n"
-" --chown, -O Change ownership of unpacked files to the UID/GID\n"
-" set in the squashfs iamge.\n"
-"\n"
-" --help, -h Print help text and exit.\n"
-" --version, -V Print version information and exit.\n"
-"\n";
-
-extern const char *__progname;
-
-static tree_node_t *find_node(tree_node_t *n, const char *path)
-{
- const char *end;
- size_t len;
-
- while (path != NULL && *path != '\0') {
- if (!S_ISDIR(n->mode)) {
- errno = ENOTDIR;
- return NULL;
- }
-
- end = strchrnul(path, '/');
- len = end - path;
-
- for (n = n->data.dir->children; n != NULL; n = n->next) {
- if (strncmp(path, n->name, len) != 0)
- continue;
- if (n->name[len] != '\0')
- continue;
- break;
- }
-
- if (n == NULL) {
- errno = ENOENT;
- return NULL;
- }
-
- path = *end ? (end + 1) : end;
- }
-
- return n;
-}
-
-static char *get_path(char *old, const char *arg)
-{
- char *path;
-
- free(old);
-
- path = strdup(arg);
- if (path == NULL) {
- perror("processing arguments");
- exit(EXIT_FAILURE);
- }
-
- if (canonicalize_name(path)) {
- fprintf(stderr, "Invalid path: %s\n", arg);
- free(path);
- exit(EXIT_FAILURE);
- }
-
- return path;
-}
-
-int main(int argc, char **argv)
-{
- int i, fd, status = EXIT_FAILURE, op = OP_NONE, unpack_flags = 0;
- const char *unpack_root = NULL;
- frag_reader_t *frag = NULL;
- char *cmdpath = NULL;
- sqfs_super_t super;
- compressor_t *cmp;
- tree_node_t *n;
- fstree_t fs;
-
- for (;;) {
- i = getopt_long(argc, argv, short_opts, long_opts, NULL);
- if (i == -1)
- break;
-
- switch (i) {
- case 'D':
- unpack_flags |= UNPACK_NO_DEVICES;
- break;
- case 'S':
- unpack_flags |= UNPACK_NO_SOCKETS;
- break;
- case 'F':
- unpack_flags |= UNPACK_NO_FIFO;
- break;
- case 'L':
- unpack_flags |= UNPACK_NO_SLINKS;
- break;
- case 'C':
- unpack_flags |= UNPACK_CHMOD;
- break;
- case 'O':
- unpack_flags |= UNPACK_CHOWN;
- break;
- case 'E':
- unpack_flags |= UNPACK_NO_EMPTY;
- break;
- case 'c':
- op = OP_CAT;
- cmdpath = get_path(cmdpath, optarg);
- break;
- case 'l':
- op = OP_LS;
- cmdpath = get_path(cmdpath, optarg);
- break;
- case 'u':
- op = OP_UNPACK;
- unpack_root = optarg;
- break;
- case 'h':
- printf(help_string, __progname);
- status = EXIT_SUCCESS;
- goto out_cmd;
- case 'V':
- print_version();
- status = EXIT_SUCCESS;
- goto out_cmd;
- default:
- goto fail_arg;
- }
- }
-
- if (op == OP_NONE) {
- fputs("No opteration specified\n", stderr);
- goto fail_arg;
- }
-
- if (optind >= argc) {
- fputs("Missing image argument\n", stderr);
- goto fail_arg;
- }
-
- fd = open(argv[optind], O_RDONLY);
- if (fd < 0) {
- perror(argv[optind]);
- goto out_cmd;
- }
-
- if (sqfs_super_read(&super, fd))
- goto out_fd;
-
- if ((super.version_major != SQFS_VERSION_MAJOR) ||
- (super.version_minor != SQFS_VERSION_MINOR)) {
- fprintf(stderr,
- "The image uses squashfs version %d.%d\n"
- "We currently only supports version %d.%d (sorry).\n",
- super.version_major, super.version_minor,
- SQFS_VERSION_MAJOR, SQFS_VERSION_MINOR);
- goto out_fd;
- }
-
- if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
- fputs("Image has been built with compressor options.\n"
- "This is not yet supported.\n",
- stderr);
- goto out_fd;
- }
-
- if (!compressor_exists(super.compression_id)) {
- fputs("Image uses a compressor that has not been built in\n",
- stderr);
- goto out_fd;
- }
-
- cmp = compressor_create(super.compression_id, false, super.block_size);
- if (cmp == NULL)
- goto out_fd;
-
- if (read_fstree(&fs, fd, &super, cmp, unpack_flags))
- goto out_cmp;
-
- switch (op) {
- case OP_LS:
- n = find_node(fs.root, cmdpath);
- if (n == NULL) {
- perror(cmdpath);
- goto out_fs;
- }
-
- list_files(n);
- break;
- case OP_CAT:
- n = find_node(fs.root, cmdpath);
- if (n == NULL) {
- perror(cmdpath);
- goto out_fs;
- }
-
- if (!S_ISREG(n->mode)) {
- fprintf(stderr, "/%s: not a regular file\n", cmdpath);
- goto out_fs;
- }
-
- if (super.fragment_entry_count > 0 &&
- super.fragment_table_start < super.bytes_used &&
- !(super.flags & SQFS_FLAG_NO_FRAGMENTS)) {
- frag = frag_reader_create(&super, fd, cmp);
- if (frag == NULL)
- goto out_fs;
- }
-
- if (extract_file(n->data.file, cmp, super.block_size,
- frag, fd, STDOUT_FILENO)) {
- goto out_fs;
- }
- break;
- case OP_UNPACK:
- if (super.fragment_entry_count > 0 &&
- super.fragment_table_start < super.bytes_used &&
- !(super.flags & SQFS_FLAG_NO_FRAGMENTS)) {
- frag = frag_reader_create(&super, fd, cmp);
- if (frag == NULL)
- goto out_fs;
- }
-
- if (restore_fstree(unpack_root, fs.root, cmp, super.block_size,
- frag, fd, unpack_flags)) {
- goto out_fs;
- }
- break;
- }
-
- status = EXIT_SUCCESS;
-out_fs:
- if (frag != NULL)
- frag_reader_destroy(frag);
- fstree_cleanup(&fs);
-out_cmp:
- cmp->destroy(cmp);
-out_fd:
- close(fd);
-out_cmd:
- free(cmdpath);
- return status;
-fail_arg:
- fprintf(stderr, "Try `%s --help' for more information.\n", __progname);
- free(cmdpath);
- return EXIT_FAILURE;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 21:23:34 +0000