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-rw-r--r--bin/gensquashfs/dirscan.c321
-rw-r--r--bin/gensquashfs/mkfs.c216
-rw-r--r--bin/gensquashfs/mkfs.h72
-rw-r--r--bin/gensquashfs/options.c289
-rw-r--r--bin/gensquashfs/selinux.c78
5 files changed, 976 insertions, 0 deletions
diff --git a/bin/gensquashfs/dirscan.c b/bin/gensquashfs/dirscan.c
new file mode 100644
index 0000000..dbc862c
--- /dev/null
+++ b/bin/gensquashfs/dirscan.c
@@ -0,0 +1,321 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * fstree_from_dir.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "mkfs.h"
+
+#ifdef HAVE_SYS_XATTR_H
+static char *get_full_path(const char *prefix, tree_node_t *node)
+{
+ char *path = NULL, *new = NULL;
+ size_t path_len, prefix_len;
+ int ret;
+
+ path = fstree_get_path(node);
+ if (path == NULL)
+ goto fail;
+
+ ret = canonicalize_name(path);
+ assert(ret == 0);
+
+ path_len = strlen(path);
+ prefix_len = strlen(prefix);
+
+ while (prefix_len > 0 && prefix[prefix_len - 1] == '/')
+ --prefix_len;
+
+ if (prefix_len > 0) {
+ new = realloc(path, path_len + prefix_len + 2);
+ if (new == NULL)
+ goto fail;
+
+ path = new;
+
+ memmove(path + prefix_len + 1, path, path_len + 1);
+ memcpy(path, prefix, prefix_len);
+ path[prefix_len] = '/';
+ }
+
+ return path;
+fail:
+ perror("getting full path for xattr scan");
+ free(path);
+ return NULL;
+}
+
+static int xattr_from_path(sqfs_xattr_writer_t *xwr, const char *path)
+{
+ char *key, *value = NULL, *buffer = NULL;
+ ssize_t buflen, vallen, keylen;
+ int ret;
+
+ buflen = llistxattr(path, NULL, 0);
+ if (buflen < 0) {
+ fprintf(stderr, "llistxattr %s: %s", path, strerror(errno));
+ return -1;
+ }
+
+ if (buflen == 0)
+ return 0;
+
+ buffer = malloc(buflen);
+ if (buffer == NULL) {
+ perror("xattr name buffer");
+ return -1;
+ }
+
+ buflen = llistxattr(path, buffer, buflen);
+ if (buflen == -1) {
+ fprintf(stderr, "llistxattr %s: %s", path, strerror(errno));
+ goto fail;
+ }
+
+ key = buffer;
+ while (buflen > 0) {
+ vallen = lgetxattr(path, key, NULL, 0);
+ if (vallen == -1) {
+ fprintf(stderr, "lgetxattr %s: %s",
+ path, strerror(errno));
+ goto fail;
+ }
+
+ if (vallen > 0) {
+ value = calloc(1, vallen);
+ if (value == NULL) {
+ perror("allocating xattr value buffer");
+ goto fail;
+ }
+
+ vallen = lgetxattr(path, key, value, vallen);
+ if (vallen == -1) {
+ fprintf(stderr, "lgetxattr %s: %s\n",
+ path, strerror(errno));
+ goto fail;
+ }
+
+ ret = sqfs_xattr_writer_add(xwr, key, value, vallen);
+ if (ret) {
+ sqfs_perror(path,
+ "storing xattr key-value pairs",
+ ret);
+ goto fail;
+ }
+
+ free(value);
+ value = NULL;
+ }
+
+ keylen = strlen(key) + 1;
+ buflen -= keylen;
+ key += keylen;
+ }
+
+ free(buffer);
+ return 0;
+fail:
+ free(value);
+ free(buffer);
+ return -1;
+}
+#endif
+
+#ifdef _WIN32
+int fstree_from_dir(fstree_t *fs, const char *path, void *selinux_handle,
+ sqfs_xattr_writer_t *xwr, unsigned int flags)
+{
+ (void)fs; (void)path; (void)selinux_handle; (void)xwr; (void)flags;
+ fputs("Packing a directory is not supported on Windows.\n", stderr);
+ return -1;
+}
+#else
+static int xattr_xcan_dfs(const char *path_prefix, void *selinux_handle,
+ sqfs_xattr_writer_t *xwr, unsigned int flags,
+ tree_node_t *node)
+{
+ char *path;
+ int ret;
+
+ ret = sqfs_xattr_writer_begin(xwr);
+ if (ret) {
+ sqfs_perror(node->name, "recoding xattr key-value pairs\n",
+ ret);
+ return -1;
+ }
+
+#ifdef HAVE_SYS_XATTR_H
+ if (flags & DIR_SCAN_READ_XATTR) {
+ path = get_full_path(path_prefix, node);
+ if (path == NULL)
+ return -1;
+
+ ret = xattr_from_path(xwr, path);
+ free(path);
+
+ if (ret)
+ return -1;
+ }
+#else
+ (void)path_prefix;
+#endif
+
+ if (selinux_handle != NULL) {
+ path = fstree_get_path(node);
+ if (path == NULL) {
+ perror("reconstructing absolute path");
+ return -1;
+ }
+
+ ret = selinux_relable_node(selinux_handle, xwr, node, path);
+ free(path);
+
+ if (ret)
+ return -1;
+ }
+
+ if (sqfs_xattr_writer_end(xwr, &node->xattr_idx)) {
+ sqfs_perror(node->name, "completing xattr key-value pairs",
+ ret);
+ return -1;
+ }
+
+ if (S_ISDIR(node->mode)) {
+ node = node->data.dir.children;
+
+ while (node != NULL) {
+ if (xattr_xcan_dfs(path_prefix, selinux_handle, xwr,
+ flags, node)) {
+ return -1;
+ }
+
+ node = node->next;
+ }
+ }
+
+ return 0;
+}
+
+static int populate_dir(int dir_fd, fstree_t *fs, tree_node_t *root,
+ dev_t devstart, unsigned int flags)
+{
+ char *extra = NULL;
+ struct dirent *ent;
+ struct stat sb;
+ tree_node_t *n;
+ int childfd;
+ DIR *dir;
+
+ dir = fdopendir(dir_fd);
+ if (dir == NULL) {
+ perror("fdopendir");
+ close(dir_fd);
+ return -1;
+ }
+
+ /* XXX: fdopendir can dup and close dir_fd internally
+ and still be compliant with the spec. */
+ dir_fd = dirfd(dir);
+
+ for (;;) {
+ errno = 0;
+ ent = readdir(dir);
+
+ if (ent == NULL) {
+ if (errno) {
+ perror("readdir");
+ goto fail;
+ }
+ break;
+ }
+
+ if (!strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "."))
+ continue;
+
+ if (fstatat(dir_fd, ent->d_name, &sb, AT_SYMLINK_NOFOLLOW)) {
+ perror(ent->d_name);
+ goto fail;
+ }
+
+ if ((flags & DIR_SCAN_ONE_FILESYSTEM) && sb.st_dev != devstart)
+ continue;
+
+ if (S_ISLNK(sb.st_mode)) {
+ extra = calloc(1, sb.st_size + 1);
+ if (extra == NULL)
+ goto fail_rdlink;
+
+ if (readlinkat(dir_fd, ent->d_name,
+ extra, sb.st_size) < 0) {
+ goto fail_rdlink;
+ }
+
+ extra[sb.st_size] = '\0';
+ }
+
+ if (!(flags & DIR_SCAN_KEEP_TIME))
+ sb.st_mtime = fs->defaults.st_mtime;
+
+ n = fstree_mknode(root, ent->d_name, strlen(ent->d_name),
+ extra, &sb);
+ if (n == NULL) {
+ perror("creating tree node");
+ goto fail;
+ }
+
+ free(extra);
+ extra = NULL;
+
+ if (S_ISDIR(n->mode)) {
+ childfd = openat(dir_fd, n->name, O_DIRECTORY |
+ O_RDONLY | O_CLOEXEC);
+ if (childfd < 0) {
+ perror(n->name);
+ goto fail;
+ }
+
+ if (populate_dir(childfd, fs, n, devstart, flags))
+ goto fail;
+ }
+ }
+
+ closedir(dir);
+ return 0;
+fail_rdlink:
+ perror("readlink");
+fail:
+ closedir(dir);
+ free(extra);
+ return -1;
+}
+
+int fstree_from_dir(fstree_t *fs, const char *path, void *selinux_handle,
+ sqfs_xattr_writer_t *xwr, unsigned int flags)
+{
+ struct stat sb;
+ int fd;
+
+ fd = open(path, O_DIRECTORY | O_RDONLY | O_CLOEXEC);
+ if (fd < 0) {
+ perror(path);
+ return -1;
+ }
+
+ if (fstat(fd, &sb)) {
+ perror(path);
+ close(fd);
+ return -1;
+ }
+
+ if (populate_dir(fd, fs, fs->root, sb.st_dev, flags))
+ return -1;
+
+ if (xwr != NULL && (selinux_handle != NULL ||
+ (flags & DIR_SCAN_READ_XATTR))) {
+ if (xattr_xcan_dfs(path, selinux_handle, xwr, flags, fs->root))
+ return -1;
+ }
+
+ return 0;
+}
+#endif
diff --git a/bin/gensquashfs/mkfs.c b/bin/gensquashfs/mkfs.c
new file mode 100644
index 0000000..9ffbb94
--- /dev/null
+++ b/bin/gensquashfs/mkfs.c
@@ -0,0 +1,216 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * mkfs.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "mkfs.h"
+
+static int set_working_dir(options_t *opt)
+{
+ const char *ptr;
+ char *path;
+
+ if (opt->packdir != NULL) {
+ if (chdir(opt->packdir)) {
+ perror(opt->packdir);
+ return -1;
+ }
+ return 0;
+ }
+
+ ptr = strrchr(opt->infile, '/');
+ if (ptr == NULL)
+ return 0;
+
+ path = strndup(opt->infile, ptr - opt->infile);
+ if (path == NULL) {
+ perror("constructing input directory path");
+ return -1;
+ }
+
+ if (chdir(path)) {
+ perror(path);
+ free(path);
+ return -1;
+ }
+
+ free(path);
+ return 0;
+}
+
+static int pack_files(sqfs_block_processor_t *data, fstree_t *fs,
+ options_t *opt)
+{
+ sqfs_inode_generic_t **inode_ptr;
+ sqfs_u64 filesize;
+ sqfs_file_t *file;
+ tree_node_t *node;
+ const char *path;
+ char *node_path;
+ file_info_t *fi;
+ int flags;
+ int ret;
+
+ if (set_working_dir(opt))
+ return -1;
+
+ for (fi = fs->files; fi != NULL; fi = fi->next) {
+ if (fi->input_file == NULL) {
+ node = container_of(fi, tree_node_t, data.file);
+
+ node_path = fstree_get_path(node);
+ if (node_path == NULL) {
+ perror("reconstructing file path");
+ return -1;
+ }
+
+ ret = canonicalize_name(node_path);
+ assert(ret == 0);
+
+ path = node_path;
+ } else {
+ node_path = NULL;
+ path = fi->input_file;
+ }
+
+ if (!opt->cfg.quiet)
+ printf("packing %s\n", path);
+
+ file = sqfs_open_file(path, SQFS_FILE_OPEN_READ_ONLY);
+ if (file == NULL) {
+ perror(path);
+ free(node_path);
+ return -1;
+ }
+
+ flags = 0;
+ filesize = file->get_size(file);
+
+ if (opt->no_tail_packing && filesize > opt->cfg.block_size)
+ flags |= SQFS_BLK_DONT_FRAGMENT;
+
+ inode_ptr = (sqfs_inode_generic_t **)&fi->user_ptr;
+
+ ret = write_data_from_file(path, data, inode_ptr, file, flags);
+ sqfs_destroy(file);
+ free(node_path);
+
+ if (ret)
+ return -1;
+ }
+
+ return 0;
+}
+
+static int relabel_tree_dfs(const char *filename, sqfs_xattr_writer_t *xwr,
+ tree_node_t *n, void *selinux_handle)
+{
+ char *path = fstree_get_path(n);
+ int ret;
+
+ if (path == NULL) {
+ perror("getting absolute node path for SELinux relabeling");
+ return -1;
+ }
+
+ ret = sqfs_xattr_writer_begin(xwr);
+ if (ret) {
+ sqfs_perror(filename, "recording xattr key-value pairs", ret);
+ return -1;
+ }
+
+ if (selinux_relable_node(selinux_handle, xwr, n, path)) {
+ free(path);
+ return -1;
+ }
+
+ ret = sqfs_xattr_writer_end(xwr, &n->xattr_idx);
+ if (ret) {
+ sqfs_perror(filename, "flushing completed key-value pairs",
+ ret);
+ return -1;
+ }
+
+ free(path);
+
+ if (S_ISDIR(n->mode)) {
+ for (n = n->data.dir.children; n != NULL; n = n->next) {
+ if (relabel_tree_dfs(filename, xwr, n, selinux_handle))
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static int read_fstree(fstree_t *fs, options_t *opt, sqfs_xattr_writer_t *xwr,
+ void *selinux_handle)
+{
+ FILE *fp;
+ int ret;
+
+ if (opt->infile == NULL) {
+ return fstree_from_dir(fs, opt->packdir, selinux_handle,
+ xwr, opt->dirscan_flags);
+ }
+
+ fp = fopen(opt->infile, "rb");
+ if (fp == NULL) {
+ perror(opt->infile);
+ return -1;
+ }
+
+ ret = fstree_from_file(fs, opt->infile, fp);
+ fclose(fp);
+
+ if (ret == 0 && selinux_handle != NULL)
+ ret = relabel_tree_dfs(opt->cfg.filename, xwr,
+ fs->root, selinux_handle);
+
+ return ret;
+}
+
+int main(int argc, char **argv)
+{
+ int status = EXIT_FAILURE;
+ void *sehnd = NULL;
+ sqfs_writer_t sqfs;
+ options_t opt;
+
+ process_command_line(&opt, argc, argv);
+
+ if (sqfs_writer_init(&sqfs, &opt.cfg))
+ return EXIT_FAILURE;
+
+ if (opt.selinux != NULL) {
+ sehnd = selinux_open_context_file(opt.selinux);
+ if (sehnd == NULL)
+ goto out;
+ }
+
+ if (read_fstree(&sqfs.fs, &opt, sqfs.xwr, sehnd)) {
+ if (sehnd != NULL)
+ selinux_close_context_file(sehnd);
+ goto out;
+ }
+
+ if (sehnd != NULL) {
+ selinux_close_context_file(sehnd);
+ sehnd = NULL;
+ }
+
+ if (fstree_post_process(&sqfs.fs))
+ goto out;
+
+ if (pack_files(sqfs.data, &sqfs.fs, &opt))
+ goto out;
+
+ if (sqfs_writer_finish(&sqfs, &opt.cfg))
+ goto out;
+
+ status = EXIT_SUCCESS;
+out:
+ sqfs_writer_cleanup(&sqfs, status);
+ return status;
+}
diff --git a/bin/gensquashfs/mkfs.h b/bin/gensquashfs/mkfs.h
new file mode 100644
index 0000000..1b767aa
--- /dev/null
+++ b/bin/gensquashfs/mkfs.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * mkfs.h
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#ifndef MKFS_H
+#define MKFS_H
+
+#include "config.h"
+
+#include "common.h"
+#include "fstree.h"
+
+#ifdef HAVE_SYS_XATTR_H
+#include <sys/xattr.h>
+
+#if defined(__APPLE__) && defined(__MACH__)
+#define llistxattr(path, list, size) \
+ listxattr(path, list, size, XATTR_NOFOLLOW)
+
+#define lgetxattr(path, name, value, size) \
+ getxattr(path, name, value, size, 0, XATTR_NOFOLLOW)
+#endif
+#endif
+
+#ifdef WITH_SELINUX
+#include <selinux/selinux.h>
+#include <selinux/label.h>
+#endif
+
+#include <getopt.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <dirent.h>
+#include <stdio.h>
+#include <errno.h>
+#include <ctype.h>
+
+typedef struct {
+ sqfs_writer_cfg_t cfg;
+ unsigned int dirscan_flags;
+ const char *infile;
+ const char *packdir;
+ const char *selinux;
+ bool no_tail_packing;
+} options_t;
+
+enum {
+ DIR_SCAN_KEEP_TIME = 0x01,
+
+ DIR_SCAN_ONE_FILESYSTEM = 0x02,
+
+ DIR_SCAN_READ_XATTR = 0x04,
+};
+
+void process_command_line(options_t *opt, int argc, char **argv);
+
+int fstree_from_dir(fstree_t *fs, const char *path, void *selinux_handle,
+ sqfs_xattr_writer_t *xwr, unsigned int flags);
+
+
+void *selinux_open_context_file(const char *filename);
+
+int selinux_relable_node(void *sehnd, sqfs_xattr_writer_t *xwr,
+ tree_node_t *node, const char *path);
+
+void selinux_close_context_file(void *sehnd);
+
+#endif /* MKFS_H */
diff --git a/bin/gensquashfs/options.c b/bin/gensquashfs/options.c
new file mode 100644
index 0000000..2369787
--- /dev/null
+++ b/bin/gensquashfs/options.c
@@ -0,0 +1,289 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * options.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "mkfs.h"
+
+static struct option long_opts[] = {
+ { "compressor", required_argument, NULL, 'c' },
+ { "block-size", required_argument, NULL, 'b' },
+ { "dev-block-size", required_argument, NULL, 'B' },
+ { "defaults", required_argument, NULL, 'd' },
+ { "comp-extra", required_argument, NULL, 'X' },
+ { "pack-file", required_argument, NULL, 'F' },
+ { "pack-dir", required_argument, NULL, 'D' },
+ { "num-jobs", required_argument, NULL, 'j' },
+ { "queue-backlog", required_argument, NULL, 'Q' },
+ { "keep-time", no_argument, NULL, 'k' },
+#ifdef HAVE_SYS_XATTR_H
+ { "keep-xattr", no_argument, NULL, 'x' },
+#endif
+ { "one-file-system", no_argument, NULL, 'o' },
+ { "exportable", no_argument, NULL, 'e' },
+ { "no-tail-packing", no_argument, NULL, 'T' },
+ { "force", no_argument, NULL, 'f' },
+ { "quiet", no_argument, NULL, 'q' },
+#ifdef WITH_SELINUX
+ { "selinux", required_argument, NULL, 's' },
+#endif
+ { "version", no_argument, NULL, 'V' },
+ { "help", no_argument, NULL, 'h' },
+ { NULL, 0, NULL, 0 },
+};
+
+static const char *short_opts = "F:D:X:c:b:B:d:j:Q:kxoefqThV"
+#ifdef WITH_SELINUX
+"s:"
+#endif
+#ifdef HAVE_SYS_XATTR_H
+"x"
+#endif
+;
+
+static const char *help_string =
+"Usage: gensquashfs [OPTIONS...] <squashfs-file>\n"
+"\n"
+"Possible options:\n"
+"\n"
+" --pack-file, -F <file> Use a `gen_init_cpio` style description file.\n"
+" The file format is specified below.\n"
+" If --pack-dir is used, input file paths are\n"
+" relative to the pack directory, otherwise\n"
+" they are relative to the directory the pack\n"
+" file is in.\n"
+" --pack-dir, -D <directory> If --pack-file is used, this is the root path\n"
+" relative to which to read files. If no pack\n"
+" file is specified, pack the contents of the\n"
+" given directory into a SquashFS image. The\n"
+" directory becomes the root of the file\n"
+" system.\n"
+"\n"
+" --compressor, -c <name> Select the compressor to use.\n"
+" A list of available compressors is below.\n"
+" --comp-extra, -X <options> A comma separated list of extra options for\n"
+" the selected compressor. Specify 'help' to\n"
+" get a list of available options.\n"
+" --num-jobs, -j <count> Number of compressor jobs to create.\n"
+" --queue-backlog, -Q <count> Maximum number of data blocks in the thread\n"
+" worker queue before the packer starts waiting\n"
+" for the block processors to catch up.\n"
+" Defaults to 10 times the number of jobs.\n"
+" --block-size, -b <size> Block size to use for Squashfs image.\n"
+" Defaults to %u.\n"
+" --dev-block-size, -B <size> Device block size to padd the image to.\n"
+" Defaults to %u.\n"
+" --defaults, -d <options> A comma separated list of default values for\n"
+" implicitly created directories.\n"
+"\n"
+" Possible options:\n"
+" uid=<value> 0 if not set.\n"
+" gid=<value> 0 if not set.\n"
+" mode=<value> 0755 if not set.\n"
+" mtime=<value> 0 if not set.\n"
+"\n"
+#ifdef WITH_SELINUX
+" --selinux, -s <file> Specify an SELinux label file to get context\n"
+" attributes from.\n"
+#endif
+" --keep-time, -k When using --pack-dir only, use the timestamps\n"
+" from the input files instead of setting\n"
+" defaults on all input paths.\n"
+" --keep-xattr, -x When using --pack-dir only, read and pack the\n"
+" extended attributes from the input files.\n"
+" --one-file-system, -o When using --pack-dir only, stay in local file\n"
+" system and do not cross mount points.\n"
+" --exportable, -e Generate an export table for NFS support.\n"
+" --no-tail-packing, -T Do not perform tail end packing on files that\n"
+" are larger than block size.\n"
+" --force, -f Overwrite the output file if it exists.\n"
+" --quiet, -q Do not print out progress reports.\n"
+" --help, -h Print help text and exit.\n"
+" --version, -V Print version information and exit.\n"
+"\n";
+
+const char *help_details =
+"When using the pack file option, the given file is expected to contain\n"
+"newline separated entries that describe the files to be included in the\n"
+"SquashFS image. The following entry types can be specified:\n"
+"\n"
+"# a comment\n"
+"file <path> <mode> <uid> <gid> [<location>]\n"
+"dir <path> <mode> <uid> <gid>\n"
+"nod <path> <mode> <uid> <gid> <dev_type> <maj> <min>\n"
+"slink <path> <mode> <uid> <gid> <target>\n"
+"link <path> <dummy> <dummy> <dummy> <target>\n"
+"pipe <path> <mode> <uid> <gid>\n"
+"sock <path> <mode> <uid> <gid>\n"
+"\n"
+"<path> Absolute path of the entry in the image. Can be put in quotes\n"
+" if some components contain spaces.\n"
+"<location> If given, location of the input file. Either absolute or relative\n"
+" to the description file. If omitted, the image path is used,\n"
+" relative to the description file.\n"
+"<target> Symlink or hardlink target.\n"
+"<mode> Mode/permissions of the entry.\n"
+"<uid> Numeric user id.\n"
+"<gid> Numeric group id.\n"
+"<dev_type> Device type (b=block, c=character).\n"
+"<maj> Major number of a device special file.\n"
+"<min> Minor number of a device special file.\n"
+"\n"
+"Example:\n"
+" # A simple squashfs image\n"
+" dir /dev 0755 0 0\n"
+" nod /dev/console 0600 0 0 c 5 1\n"
+" dir /root 0700 0 0\n"
+" dir /sbin 0755 0 0\n"
+" \n"
+" # Add a file. Input is relative to listing or pack dir.\n"
+" file /sbin/init 0755 0 0 ../init/sbin/init\n"
+" \n"
+" # Read bin/bash, relative to listing or pack dir.\n"
+" # Implicitly create /bin.\n"
+" file /bin/bash 0755 0 0\n"
+" \n"
+" # file name with a space in it.\n"
+" file \"/opt/my app/\\\"special\\\"/data\" 0600 0 0\n"
+"\n\n";
+
+void process_command_line(options_t *opt, int argc, char **argv)
+{
+ bool have_compressor;
+ int i, ret;
+
+ memset(opt, 0, sizeof(*opt));
+ sqfs_writer_cfg_init(&opt->cfg);
+
+ for (;;) {
+ i = getopt_long(argc, argv, short_opts, long_opts, NULL);
+ if (i == -1)
+ break;
+
+ switch (i) {
+ case 'T':
+ opt->no_tail_packing = true;
+ break;
+ case 'c':
+ have_compressor = true;
+ ret = sqfs_compressor_id_from_name(optarg);
+
+ if (ret < 0) {
+ have_compressor = false;
+#ifdef WITH_LZO
+ if (opt->cfg.comp_id == SQFS_COMP_LZO)
+ have_compressor = true;
+#endif
+ }
+
+ if (!have_compressor) {
+ fprintf(stderr, "Unsupported compressor '%s'\n",
+ optarg);
+ exit(EXIT_FAILURE);
+ }
+
+ opt->cfg.comp_id = ret;
+ break;
+ case 'b':
+ if (parse_size("Block size", &opt->cfg.block_size,
+ optarg, 0)) {
+ exit(EXIT_FAILURE);
+ }
+ break;
+ case 'j':
+ opt->cfg.num_jobs = strtol(optarg, NULL, 0);
+ break;
+ case 'Q':
+ opt->cfg.max_backlog = strtol(optarg, NULL, 0);
+ break;
+ case 'B':
+ if (parse_size("Device block size",
+ &opt->cfg.devblksize, optarg, 0)) {
+ exit(EXIT_FAILURE);
+ }
+ if (opt->cfg.devblksize < 1024) {
+ fputs("Device block size must be at "
+ "least 1024\n", stderr);
+ exit(EXIT_FAILURE);
+ }
+ break;
+ case 'd':
+ opt->cfg.fs_defaults = optarg;
+ break;
+ case 'k':
+ opt->dirscan_flags |= DIR_SCAN_KEEP_TIME;
+ break;
+#ifdef HAVE_SYS_XATTR_H
+ case 'x':
+ opt->dirscan_flags |= DIR_SCAN_READ_XATTR;
+ break;
+#endif
+ case 'o':
+ opt->dirscan_flags |= DIR_SCAN_ONE_FILESYSTEM;
+ break;
+ case 'e':
+ opt->cfg.exportable = true;
+ break;
+ case 'f':
+ opt->cfg.outmode |= SQFS_FILE_OPEN_OVERWRITE;
+ break;
+ case 'q':
+ opt->cfg.quiet = true;
+ break;
+ case 'X':
+ opt->cfg.comp_extra = optarg;
+ break;
+ case 'F':
+ opt->infile = optarg;
+ break;
+ case 'D':
+ opt->packdir = optarg;
+ break;
+#ifdef WITH_SELINUX
+ case 's':
+ opt->selinux = optarg;
+ break;
+#endif
+ case 'h':
+ printf(help_string,
+ SQFS_DEFAULT_BLOCK_SIZE, SQFS_DEVBLK_SIZE);
+ fputs(help_details, stdout);
+ compressor_print_available();
+ exit(EXIT_SUCCESS);
+ case 'V':
+ print_version("gensquashfs");
+ exit(EXIT_SUCCESS);
+ default:
+ goto fail_arg;
+ }
+ }
+
+ if (opt->cfg.num_jobs < 1)
+ opt->cfg.num_jobs = 1;
+
+ if (opt->cfg.max_backlog < 1)
+ opt->cfg.max_backlog = 10 * opt->cfg.num_jobs;
+
+ if (opt->cfg.comp_extra != NULL &&
+ strcmp(opt->cfg.comp_extra, "help") == 0) {
+ compressor_print_help(opt->cfg.comp_id);
+ exit(EXIT_SUCCESS);
+ }
+
+ if (opt->infile == NULL && opt->packdir == NULL) {
+ fputs("No input file or directory specified.\n", stderr);
+ goto fail_arg;
+ }
+
+ if (optind >= argc) {
+ fputs("No output file specified.\n", stderr);
+ goto fail_arg;
+ }
+
+ opt->cfg.filename = argv[optind++];
+ return;
+fail_arg:
+ fputs("Try `gensquashfs --help' for more information.\n", stderr);
+ exit(EXIT_FAILURE);
+}
diff --git a/bin/gensquashfs/selinux.c b/bin/gensquashfs/selinux.c
new file mode 100644
index 0000000..678723b
--- /dev/null
+++ b/bin/gensquashfs/selinux.c
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * selinux.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "mkfs.h"
+
+#define XATTR_NAME_SELINUX "security.selinux"
+#define XATTR_VALUE_SELINUX "system_u:object_r:unlabeled_t:s0"
+
+#ifdef WITH_SELINUX
+int selinux_relable_node(void *sehnd, sqfs_xattr_writer_t *xwr,
+ tree_node_t *node, const char *path)
+{
+ char *context = NULL;
+ int ret;
+
+ if (selabel_lookup(sehnd, &context, path, node->mode) < 0) {
+ context = strdup(XATTR_VALUE_SELINUX);
+ if (context == NULL)
+ goto fail;
+ }
+
+ ret = sqfs_xattr_writer_add(xwr, XATTR_NAME_SELINUX,
+ context, strlen(context));
+ free(context);
+
+ if (ret)
+ sqfs_perror(node->name, "storing SELinux xattr", ret);
+
+ return ret;
+fail:
+ perror("relabeling files");
+ return -1;
+}
+
+void *selinux_open_context_file(const char *filename)
+{
+ struct selabel_handle *sehnd;
+ struct selinux_opt seopts[] = {
+ { SELABEL_OPT_PATH, filename },
+ };
+
+ sehnd = selabel_open(SELABEL_CTX_FILE, seopts, 1);
+ if (sehnd == NULL)
+ perror(filename);
+
+ return sehnd;
+}
+
+void selinux_close_context_file(void *sehnd)
+{
+ selabel_close(sehnd);
+}
+#else
+int selinux_relable_node(void *sehnd, sqfs_xattr_writer_t *xwr,
+ tree_node_t *node, const char *path)
+{
+ (void)sehnd; (void)xwr; (void)node; (void)path;
+ fputs("Built without SELinux support, cannot add SELinux labels\n",
+ stderr);
+ return -1;
+}
+
+void *selinux_open_context_file(const char *filename)
+{
+ (void)filename;
+ fputs("Built without SELinux support, cannot open contexts file\n",
+ stderr);
+ return NULL;
+}
+
+void selinux_close_context_file(void *sehnd)
+{
+ (void)sehnd;
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-29 06:21:38 +0000