summaryrefslogtreecommitdiff
path: root/bin/tar2sqfs/options.c
diff options
context:
space:
mode:
Diffstat (limited to 'bin/tar2sqfs/options.c')
-rw-r--r--bin/tar2sqfs/options.c228
1 files changed, 228 insertions, 0 deletions
diff --git a/bin/tar2sqfs/options.c b/bin/tar2sqfs/options.c
new file mode 100644
index 0000000..b5aa3ba
--- /dev/null
+++ b/bin/tar2sqfs/options.c
@@ -0,0 +1,228 @@
+#include "tar2sqfs.h"
+
+static struct option long_opts[] = {
+ { "root-becomes", required_argument, NULL, 'r' },
+ { "compressor", required_argument, NULL, 'c' },
+ { "block-size", required_argument, NULL, 'b' },
+ { "dev-block-size", required_argument, NULL, 'B' },
+ { "defaults", required_argument, NULL, 'd' },
+ { "num-jobs", required_argument, NULL, 'j' },
+ { "queue-backlog", required_argument, NULL, 'Q' },
+ { "comp-extra", required_argument, NULL, 'X' },
+ { "no-skip", no_argument, NULL, 's' },
+ { "no-xattr", no_argument, NULL, 'x' },
+ { "no-keep-time", no_argument, NULL, 'k' },
+ { "exportable", no_argument, NULL, 'e' },
+ { "no-tail-packing", no_argument, NULL, 'T' },
+ { "force", no_argument, NULL, 'f' },
+ { "quiet", no_argument, NULL, 'q' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+ { NULL, 0, NULL, 0 },
+};
+
+static const char *short_opts = "r:c:b:B:d:X:j:Q:sxekfqThV";
+
+static const char *usagestr =
+"Usage: tar2sqfs [OPTIONS...] <sqfsfile>\n"
+"\n"
+"Read an uncompressed tar archive from stdin and turn it into a squashfs\n"
+"filesystem image.\n"
+"\n"
+"Possible options:\n"
+"\n"
+" --root-becomes, -r <dir> The specified directory becomes the root.\n"
+" Only its children are packed into the image\n"
+" and its attributes (ownership, permissions,\n"
+" xattrs, ...) are stored in the root inode.\n"
+" If not set and a tarbal has an entry for './'\n"
+" or '/', it becomes the root instead.\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"
+" --no-skip, -s Abort if a tar record cannot be read instead\n"
+" of skipping it.\n"
+" --no-xattr, -x Do not copy extended attributes from archive.\n"
+" --no-keep-time, -k Do not keep the time stamps stored in the\n"
+" archive. Instead, set defaults on all files.\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"
+"Examples:\n"
+"\n"
+"\ttar2sqfs rootfs.sqfs < rootfs.tar\n"
+"\tzcat rootfs.tar.gz | tar2sqfs rootfs.sqfs\n"
+"\txzcat rootfs.tar.xz | tar2sqfs rootfs.sqfs\n"
+"\n";
+
+bool dont_skip = false;
+bool keep_time = true;
+bool no_tail_pack = false;
+sqfs_writer_cfg_t cfg;
+char *root_becomes = NULL;
+
+void process_args(int argc, char **argv)
+{
+ bool have_compressor;
+ int i, ret;
+
+ sqfs_writer_cfg_init(&cfg);
+
+ for (;;) {
+ i = getopt_long(argc, argv, short_opts, long_opts, NULL);
+ if (i == -1)
+ break;
+
+ switch (i) {
+ case 'T':
+ no_tail_pack = true;
+ break;
+ case 'b':
+ if (parse_size("Block size", &cfg.block_size,
+ optarg, 0)) {
+ exit(EXIT_FAILURE);
+ }
+ break;
+ case 'B':
+ if (parse_size("Device block size", &cfg.devblksize,
+ optarg, 0)) {
+ exit(EXIT_FAILURE);
+ }
+ if (cfg.devblksize < 1024) {
+ fputs("Device block size must be at "
+ "least 1024\n", stderr);
+ exit(EXIT_FAILURE);
+ }
+ break;
+ case 'c':
+ have_compressor = true;
+ ret = sqfs_compressor_id_from_name(optarg);
+
+ if (ret < 0) {
+ have_compressor = false;
+#ifdef WITH_LZO
+ if (cfg.comp_id == SQFS_COMP_LZO)
+ have_compressor = true;
+#endif
+ }
+
+ if (!have_compressor) {
+ fprintf(stderr, "Unsupported compressor '%s'\n",
+ optarg);
+ exit(EXIT_FAILURE);
+ }
+
+ cfg.comp_id = ret;
+ break;
+ case 'j':
+ cfg.num_jobs = strtol(optarg, NULL, 0);
+ break;
+ case 'Q':
+ cfg.max_backlog = strtol(optarg, NULL, 0);
+ break;
+ case 'X':
+ cfg.comp_extra = optarg;
+ break;
+ case 'd':
+ cfg.fs_defaults = optarg;
+ break;
+ case 'x':
+ cfg.no_xattr = true;
+ break;
+ case 'k':
+ keep_time = false;
+ break;
+ case 'r':
+ free(root_becomes);
+ root_becomes = strdup(optarg);
+ if (root_becomes == NULL) {
+ perror("copying root directory name");
+ exit(EXIT_FAILURE);
+ }
+
+ if (canonicalize_name(root_becomes) != 0 ||
+ strlen(root_becomes) == 0) {
+ fprintf(stderr,
+ "Invalid root directory '%s'.\n",
+ optarg);
+ goto fail_arg;
+ }
+ break;
+ case 's':
+ dont_skip = true;
+ break;
+ case 'e':
+ cfg.exportable = true;
+ break;
+ case 'f':
+ cfg.outmode |= SQFS_FILE_OPEN_OVERWRITE;
+ break;
+ case 'q':
+ cfg.quiet = true;
+ break;
+ case 'h':
+ printf(usagestr, SQFS_DEFAULT_BLOCK_SIZE,
+ SQFS_DEVBLK_SIZE);
+ compressor_print_available();
+ exit(EXIT_SUCCESS);
+ case 'V':
+ print_version("tar2sqfs");
+ exit(EXIT_SUCCESS);
+ default:
+ goto fail_arg;
+ }
+ }
+
+ if (cfg.num_jobs < 1)
+ cfg.num_jobs = 1;
+
+ if (cfg.max_backlog < 1)
+ cfg.max_backlog = 10 * cfg.num_jobs;
+
+ if (cfg.comp_extra != NULL && strcmp(cfg.comp_extra, "help") == 0) {
+ compressor_print_help(cfg.comp_id);
+ exit(EXIT_SUCCESS);
+ }
+
+ if (optind >= argc) {
+ fputs("Missing argument: squashfs image\n", stderr);
+ goto fail_arg;
+ }
+
+ cfg.filename = argv[optind++];
+
+ if (optind < argc) {
+ fputs("Unknown extra arguments specified.\n", stderr);
+ goto fail_arg;
+ }
+ return;
+fail_arg:
+ fputs("Try `tar2sqfs --help' for more information.\n", stderr);
+ exit(EXIT_FAILURE);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 12:10:45 +0000