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-rw-r--r--bin/gensquashfs/options.c289
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diff --git a/bin/gensquashfs/options.c b/bin/gensquashfs/options.c
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+/* 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 01:50:24 +0000