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-rw-r--r--unpack/Makemodule.am1
-rw-r--r--unpack/list_files.c90
-rw-r--r--unpack/unsquashfs.c135
-rw-r--r--unpack/unsquashfs.h6
4 files changed, 219 insertions, 13 deletions
diff --git a/unpack/Makemodule.am b/unpack/Makemodule.am
index 2a08295..a199375 100644
--- a/unpack/Makemodule.am
+++ b/unpack/Makemodule.am
@@ -1,5 +1,6 @@
unsquashfs_SOURCES = unpack/unsquashfs.c unpack/tree_node_from_inode.c
unsquashfs_SOURCES += unpack/unsquashfs.h unpack/read_fstree.c
+unsquashfs_SOURCES += unpack/list_files.c
unsquashfs_LDADD = libsquashfs.a libfstree.a libcompress.a libutil.a
if WITH_LZMA
diff --git a/unpack/list_files.c b/unpack/list_files.c
new file mode 100644
index 0000000..aaf0652
--- /dev/null
+++ b/unpack/list_files.c
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "unsquashfs.h"
+
+static void mode_to_str(uint16_t mode, char *p)
+{
+ switch (mode & S_IFMT) {
+ case S_IFDIR: *(p++) = 'd'; break;
+ case S_IFCHR: *(p++) = 'c'; break;
+ case S_IFBLK: *(p++) = 'b'; break;
+ case S_IFREG: *(p++) = '-'; break;
+ case S_IFLNK: *(p++) = 'l'; break;
+ case S_IFSOCK: *(p++) = 's'; break;
+ case S_IFIFO: *(p++) = 'p'; break;
+ default: *(p++) = '?'; break;
+ }
+
+ *(p++) = (mode & S_IRUSR) ? 'r' : '-';
+ *(p++) = (mode & S_IWUSR) ? 'w' : '-';
+
+ switch (mode & (S_IXUSR | S_ISUID)) {
+ case S_IXUSR | S_ISUID: *(p++) = 's'; break;
+ case S_IXUSR: *(p++) = 'x'; break;
+ case S_ISUID: *(p++) = 'S'; break;
+ default: *(p++) = '-'; break;
+ }
+
+ *(p++) = (mode & S_IRGRP) ? 'r' : '-';
+ *(p++) = (mode & S_IWGRP) ? 'w' : '-';
+
+ switch (mode & (S_IXGRP | S_ISGID)) {
+ case S_IXGRP | S_ISGID: *(p++) = 's'; break;
+ case S_IXGRP: *(p++) = 'x'; break;
+ case S_ISGID: *(p++) = 'S'; break;
+ case 0: *(p++) = '-'; break;
+ }
+
+ *(p++) = (mode & S_IROTH) ? 'r' : '-';
+ *(p++) = (mode & S_IWOTH) ? 'w' : '-';
+
+ switch (mode & (S_IXOTH | S_ISVTX)) {
+ case S_IXOTH | S_ISVTX: *(p++) = 't'; break;
+ case S_IXOTH: *(p++) = 'x'; break;
+ case S_ISVTX: *(p++) = 'T'; break;
+ case 0: *(p++) = '-'; break;
+ }
+
+ *p = '\0';
+}
+
+static int count_int_chars(unsigned int i)
+{
+ int count = 1;
+
+ while (i > 10) {
+ ++count;
+ i /= 10;
+ }
+
+ return count;
+}
+
+void list_files(tree_node_t *node)
+{
+ int i, max_uid_chars = 0, max_gid_chars = 0;
+ char modestr[12];
+ tree_node_t *n;
+
+ if (S_ISDIR(node->mode)) {
+ for (n = node->data.dir->children; n != NULL; n = n->next) {
+ i = count_int_chars(n->uid);
+ max_uid_chars = i > max_uid_chars ? i : max_uid_chars;
+
+ i = count_int_chars(n->gid);
+ max_gid_chars = i > max_gid_chars ? i : max_gid_chars;
+ }
+
+ for (n = node->data.dir->children; n != NULL; n = n->next) {
+ mode_to_str(n->mode, modestr);
+
+ printf("%s %*u/%-*u %s\n", modestr,
+ max_uid_chars, n->uid,
+ max_gid_chars, n->gid, n->name);
+ }
+ } else {
+ mode_to_str(node->mode, modestr);
+
+ printf("%s %u/%u %s\n", modestr,
+ node->uid, node->gid, node->name);
+ }
+}
diff --git a/unpack/unsquashfs.c b/unpack/unsquashfs.c
index d332dee..b253bae 100644
--- a/unpack/unsquashfs.c
+++ b/unpack/unsquashfs.c
@@ -1,28 +1,119 @@
/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "unsquashfs.h"
+static struct option long_opts[] = {
+ { "list", required_argument, NULL, 'l' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+};
+
+static const char *short_opts = "l:hV";
+
+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"
+" --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;
+}
+
int main(int argc, char **argv)
{
- int fd, status = EXIT_FAILURE;
+ int i, fd, status = EXIT_FAILURE;
+ char *lspath = NULL;
sqfs_super_t super;
compressor_t *cmp;
fstree_t fs;
- if (argc != 2) {
- fprintf(stderr, "Usage: %s <filename>\n", __progname);
- return EXIT_FAILURE;
+ for (;;) {
+ i = getopt_long(argc, argv, short_opts, long_opts, NULL);
+ if (i == -1)
+ break;
+
+ switch (i) {
+ case 'l':
+ if (optarg != NULL) {
+ free(lspath);
+
+ lspath = strdup(optarg ? optarg : "");
+ if (lspath == NULL) {
+ perror("processing arguments");
+ return EXIT_FAILURE;
+ }
+
+ if (canonicalize_name(lspath)) {
+ fprintf(stderr, "Invalid pth: %s\n",
+ optarg);
+ goto out_cmd;
+ }
+ }
+ 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;
+ }
}
- fd = open(argv[1], O_RDONLY);
+ if (optind >= argc) {
+ fprintf(stderr, "Usage: %s [OPTIONS] <filename>\n",
+ __progname);
+ goto out_cmd;
+ }
+
+ fd = open(argv[optind], O_RDONLY);
if (fd < 0) {
- perror(argv[1]);
- return EXIT_FAILURE;
+ perror(argv[optind]);
+ goto out_cmd;
}
if (sqfs_super_read(&super, fd))
- goto out;
+ goto out_fd;
if ((super.version_major != SQFS_VERSION_MAJOR) ||
(super.version_minor != SQFS_VERSION_MINOR)) {
@@ -31,34 +122,52 @@ int main(int argc, char **argv)
"We currently only supports version %d.%d (sorry).\n",
super.version_major, super.version_minor,
SQFS_VERSION_MAJOR, SQFS_VERSION_MINOR);
- goto out;
+ 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;
+ goto out_fd;
}
if (!compressor_exists(super.compression_id)) {
fputs("Image uses a compressor that has not been built in\n",
stderr);
- goto out;
+ goto out_fd;
}
cmp = compressor_create(super.compression_id, false, super.block_size);
if (cmp == NULL)
- goto out;
+ goto out_fd;
if (read_fstree(&fs, fd, &super, cmp))
goto out_cmp;
+ if (lspath != NULL) {
+ tree_node_t *n = find_node(fs.root, lspath);
+
+ if (n == NULL) {
+ perror(lspath);
+ goto out_fs;
+ }
+
+ list_files(n);
+ }
+
status = EXIT_SUCCESS;
+out_fs:
fstree_cleanup(&fs);
out_cmp:
cmp->destroy(cmp);
-out:
+out_fd:
close(fd);
+out_cmd:
+ free(lspath);
return status;
+fail_arg:
+ fprintf(stderr, "Try `%s --help' for more information.\n", __progname);
+ free(lspath);
+ return EXIT_FAILURE;
}
diff --git a/unpack/unsquashfs.h b/unpack/unsquashfs.h
index 5553012..52b3889 100644
--- a/unpack/unsquashfs.h
+++ b/unpack/unsquashfs.h
@@ -7,10 +7,14 @@
#include "compress.h"
#include "id_table.h"
#include "fstree.h"
+#include "config.h"
+#include "util.h"
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
+#include <getopt.h>
+#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
@@ -21,4 +25,6 @@ tree_node_t *tree_node_from_inode(sqfs_inode_generic_t *inode,
int read_fstree(fstree_t *out, int fd, sqfs_super_t *super, compressor_t *cmp);
+void list_files(tree_node_t *node);
+
#endif /* UNSQUASHFS_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 17:37:51 +0000