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-rw-r--r--bin/rdsquashfs/options.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/bin/rdsquashfs/options.c b/bin/rdsquashfs/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 "rdsquashfs.h"
+
+static struct option long_opts[] = {
+ { "list", required_argument, NULL, 'l' },
+ { "cat", required_argument, NULL, 'c' },
+ { "xattr", required_argument, NULL, 'x' },
+ { "unpack-root", required_argument, NULL, 'p' },
+ { "unpack-path", 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' },
+ { "no-sparse", no_argument, NULL, 'Z' },
+#ifdef HAVE_SYS_XATTR_H
+ { "set-xattr", no_argument, NULL, 'X' },
+#endif
+ { "set-times", no_argument, NULL, 'T' },
+ { "describe", no_argument, NULL, 'd' },
+ { "chmod", no_argument, NULL, 'C' },
+ { "chown", no_argument, NULL, 'O' },
+ { "quiet", no_argument, NULL, 'q' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+ { NULL, 0, NULL, 0 },
+};
+
+static const char *short_opts =
+ "l:c:u:p:x:DSFLCOEZTj:dqhV"
+#ifdef HAVE_SYS_XATTR_H
+ "X"
+#endif
+ ;
+
+static const char *help_string =
+"Usage: rdsquashfs [OPTIONS] <squashfs-file>\n"
+"\n"
+"View or extract the contents of a squashfs image.\n"
+"\n"
+"Possible options:\n"
+"\n"
+" --list, -l <path> Produce a directory listing for a given path in\n"
+" the squashfs image.\n"
+" --cat, -c <path> If the specified path is a regular file in the,\n"
+" image, dump its contents to stdout.\n"
+" --xattr, -x <path> Enumerate extended attributes associated with\n"
+" an inode that the given path resolves to.\n"
+" --unpack-path, -u <path> Unpack this sub directory from the image. To\n"
+" unpack everything, simply specify /.\n"
+" --describe, -d Produce a file listing from the image.\n"
+"\n"
+" --unpack-root, -p <path> If used with --unpack-path, this is where the\n"
+" data unpacked to. If used with --describe, this\n"
+" is used as a prefix for the input path of\n"
+" regular files.\n"
+"\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\n"
+" empty after applying the above rules.\n"
+" --no-sparse, -Z Do not create sparse files, always write zero\n"
+" blocks to disk.\n"
+#ifdef HAVE_SYS_XATTR_H
+" --set-xattr, -X When unpacking files to disk, set the extended\n"
+" attributes from the squashfs image.\n"
+#endif
+" --set-times, -T When unpacking files to disk, set the create\n"
+" and modify timestamps from the squashfs image.\n"
+" --chmod, -C Change permission flags of unpacked files to\n"
+" those store in the squashfs image.\n"
+" --chown, -O Change ownership of unpacked files to the\n"
+" UID/GID set in the squashfs image.\n"
+" --quiet, -q Do not print out progress while unpacking.\n"
+"\n"
+" --help, -h Print help text and exit.\n"
+" --version, -V Print version information and exit.\n"
+"\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;
+}
+
+void process_command_line(options_t *opt, int argc, char **argv)
+{
+ int i;
+
+ opt->op = OP_NONE;
+ opt->rdtree_flags = 0;
+ opt->flags = 0;
+ opt->cmdpath = NULL;
+ opt->unpack_root = NULL;
+ opt->image_name = NULL;
+
+ for (;;) {
+ i = getopt_long(argc, argv, short_opts, long_opts, NULL);
+ if (i == -1)
+ break;
+
+ switch (i) {
+ case 'D':
+ opt->rdtree_flags |= SQFS_TREE_NO_DEVICES;
+ break;
+ case 'S':
+ opt->rdtree_flags |= SQFS_TREE_NO_SOCKETS;
+ break;
+ case 'F':
+ opt->rdtree_flags |= SQFS_TREE_NO_FIFO;
+ break;
+ case 'L':
+ opt->rdtree_flags |= SQFS_TREE_NO_SLINKS;
+ break;
+ case 'E':
+ opt->rdtree_flags |= SQFS_TREE_NO_EMPTY;
+ break;
+ case 'C':
+ opt->flags |= UNPACK_CHMOD;
+ break;
+ case 'O':
+ opt->flags |= UNPACK_CHOWN;
+ break;
+ case 'Z':
+ opt->flags |= UNPACK_NO_SPARSE;
+ break;
+#ifdef HAVE_SYS_XATTR_H
+ case 'X':
+ opt->flags |= UNPACK_SET_XATTR;
+ break;
+#endif
+ case 'T':
+ opt->flags |= UNPACK_SET_TIMES;
+ break;
+ case 'c':
+ opt->op = OP_CAT;
+ opt->cmdpath = get_path(opt->cmdpath, optarg);
+ break;
+ case 'd':
+ opt->op = OP_DESCRIBE;
+ free(opt->cmdpath);
+ opt->cmdpath = NULL;
+ break;
+ case 'x':
+ opt->op = OP_RDATTR;
+ opt->cmdpath = get_path(opt->cmdpath, optarg);
+ break;
+ case 'l':
+ opt->op = OP_LS;
+ opt->cmdpath = get_path(opt->cmdpath, optarg);
+ break;
+ case 'p':
+ opt->unpack_root = optarg;
+ break;
+ case 'u':
+ opt->op = OP_UNPACK;
+ opt->cmdpath = get_path(opt->cmdpath, optarg);
+ break;
+ case 'q':
+ opt->flags |= UNPACK_QUIET;
+ break;
+ case 'h':
+ fputs(help_string, stdout);
+ free(opt->cmdpath);
+ exit(EXIT_SUCCESS);
+ case 'V':
+ print_version("rdsquashfs");
+ free(opt->cmdpath);
+ exit(EXIT_SUCCESS);
+ default:
+ goto fail_arg;
+ }
+ }
+
+ if (opt->op == OP_NONE) {
+ fputs("No operation specified\n", stderr);
+ goto fail_arg;
+ }
+
+ if (opt->op == OP_LS || opt->op == OP_CAT || opt->op == OP_RDATTR) {
+ opt->rdtree_flags |= SQFS_TREE_NO_RECURSE;
+ }
+
+ if (optind >= argc) {
+ fputs("Missing image argument\n", stderr);
+ goto fail_arg;
+ }
+
+ opt->image_name = argv[optind++];
+ return;
+fail_arg:
+ fputs("Try `rdsquashfs --help' for more information.\n", stderr);
+ free(opt->cmdpath);
+ exit(EXIT_FAILURE);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 21:47:38 +0000