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-rw-r--r--src/dissect/dissect.c1927
-rw-r--r--src/dissect/meson.build17
2 files changed, 1944 insertions, 0 deletions
diff --git a/src/dissect/dissect.c b/src/dissect/dissect.c
new file mode 100644
index 0000000..92432b6
--- /dev/null
+++ b/src/dissect/dissect.c
@@ -0,0 +1,1927 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <linux/loop.h>
+#include <stdio.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/mount.h>
+
+#include "sd-device.h"
+
+#include "architecture.h"
+#include "blockdev-util.h"
+#include "build.h"
+#include "chase.h"
+#include "copy.h"
+#include "device-util.h"
+#include "devnum-util.h"
+#include "discover-image.h"
+#include "dissect-image.h"
+#include "env-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "format-table.h"
+#include "format-util.h"
+#include "fs-util.h"
+#include "hexdecoct.h"
+#include "log.h"
+#include "loop-util.h"
+#include "main-func.h"
+#include "mkdir.h"
+#include "mount-util.h"
+#include "mountpoint-util.h"
+#include "namespace-util.h"
+#include "parse-argument.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "pretty-print.h"
+#include "process-util.h"
+#include "recurse-dir.h"
+#include "sha256.h"
+#include "stat-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "terminal-util.h"
+#include "tmpfile-util.h"
+#include "uid-alloc-range.h"
+#include "user-util.h"
+
+static enum {
+ ACTION_DISSECT,
+ ACTION_MOUNT,
+ ACTION_UMOUNT,
+ ACTION_ATTACH,
+ ACTION_DETACH,
+ ACTION_LIST,
+ ACTION_MTREE,
+ ACTION_WITH,
+ ACTION_COPY_FROM,
+ ACTION_COPY_TO,
+ ACTION_DISCOVER,
+ ACTION_VALIDATE,
+} arg_action = ACTION_DISSECT;
+static char *arg_image = NULL;
+static char *arg_root = NULL;
+static char *arg_path = NULL;
+static const char *arg_source = NULL;
+static const char *arg_target = NULL;
+static DissectImageFlags arg_flags =
+ DISSECT_IMAGE_GENERIC_ROOT |
+ DISSECT_IMAGE_DISCARD_ON_LOOP |
+ DISSECT_IMAGE_RELAX_VAR_CHECK |
+ DISSECT_IMAGE_FSCK |
+ DISSECT_IMAGE_USR_NO_ROOT |
+ DISSECT_IMAGE_GROWFS |
+ DISSECT_IMAGE_PIN_PARTITION_DEVICES |
+ DISSECT_IMAGE_ADD_PARTITION_DEVICES;
+static VeritySettings arg_verity_settings = VERITY_SETTINGS_DEFAULT;
+static JsonFormatFlags arg_json_format_flags = JSON_FORMAT_OFF;
+static PagerFlags arg_pager_flags = 0;
+static bool arg_legend = true;
+static bool arg_rmdir = false;
+static bool arg_in_memory = false;
+static char **arg_argv = NULL;
+static char *arg_loop_ref = NULL;
+static ImagePolicy* arg_image_policy = NULL;
+static bool arg_mtree_hash = true;
+
+STATIC_DESTRUCTOR_REGISTER(arg_image, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_root, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_path, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_verity_settings, verity_settings_done);
+STATIC_DESTRUCTOR_REGISTER(arg_argv, strv_freep);
+STATIC_DESTRUCTOR_REGISTER(arg_loop_ref, freep);
+
+static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ pager_open(arg_pager_flags);
+
+ r = terminal_urlify_man("systemd-dissect", "1", &link);
+ if (r < 0)
+ return log_oom();
+
+ printf("%1$s [OPTIONS...] IMAGE\n"
+ "%1$s [OPTIONS...] --mount IMAGE PATH\n"
+ "%1$s [OPTIONS...] --umount PATH\n"
+ "%1$s [OPTIONS...] --attach IMAGE\n"
+ "%1$s [OPTIONS...] --detach PATH\n"
+ "%1$s [OPTIONS...] --list IMAGE\n"
+ "%1$s [OPTIONS...] --mtree IMAGE\n"
+ "%1$s [OPTIONS...] --with IMAGE [COMMAND…]\n"
+ "%1$s [OPTIONS...] --copy-from IMAGE PATH [TARGET]\n"
+ "%1$s [OPTIONS...] --copy-to IMAGE [SOURCE] PATH\n"
+ "%1$s [OPTIONS...] --discover\n"
+ "%1$s [OPTIONS...] --validate IMAGE\n"
+ "\n%5$sDissect a Discoverable Disk Image (DDI).%6$s\n\n"
+ "%3$sOptions:%4$s\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " --no-legend Do not show the headers and footers\n"
+ " -r --read-only Mount read-only\n"
+ " --fsck=BOOL Run fsck before mounting\n"
+ " --growfs=BOOL Grow file system to partition size, if marked\n"
+ " --mkdir Make mount directory before mounting, if missing\n"
+ " --rmdir Remove mount directory after unmounting\n"
+ " --discard=MODE Choose 'discard' mode (disabled, loop, all, crypto)\n"
+ " --in-memory Copy image into memory\n"
+ " --root-hash=HASH Specify root hash for verity\n"
+ " --root-hash-sig=SIG Specify pkcs7 signature of root hash for verity\n"
+ " as a DER encoded PKCS7, either as a path to a file\n"
+ " or as an ASCII base64 encoded string prefixed by\n"
+ " 'base64:'\n"
+ " --verity-data=PATH Specify data file with hash tree for verity if it is\n"
+ " not embedded in IMAGE\n"
+ " --image-policy=POLICY\n"
+ " Specify image dissection policy\n"
+ " --json=pretty|short|off\n"
+ " Generate JSON output\n"
+ " --loop-ref=NAME Set reference string for loopback device\n"
+ " --mtree-hash=BOOL Whether to include SHA256 hash in the mtree output\n"
+ "\n%3$sCommands:%4$s\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " -m --mount Mount the image to the specified directory\n"
+ " -M Shortcut for --mount --mkdir\n"
+ " -u --umount Unmount the image from the specified directory\n"
+ " -U Shortcut for --umount --rmdir\n"
+ " --attach Attach the disk image to a loopback block device\n"
+ " --detach Detach a loopback block device gain\n"
+ " -l --list List all the files and directories of the specified\n"
+ " OS image\n"
+ " --mtree Show BSD mtree manifest of OS image\n"
+ " --with Mount, run command, unmount\n"
+ " -x --copy-from Copy files from image to host\n"
+ " -a --copy-to Copy files from host to image\n"
+ " --discover Discover DDIs in well known directories\n"
+ " --validate Validate image and image policy\n"
+ "\nSee the %2$s for details.\n",
+ program_invocation_short_name,
+ link,
+ ansi_underline(),
+ ansi_normal(),
+ ansi_highlight(),
+ ansi_normal());
+
+ return 0;
+}
+
+static int patch_argv(int *argc, char ***argv, char ***buf) {
+ _cleanup_free_ char **l = NULL;
+ char **e;
+
+ assert(argc);
+ assert(*argc >= 0);
+ assert(argv);
+ assert(*argv);
+ assert(buf);
+
+ /* Ugly hack: if --with is included in command line, also insert "--" immediately after it, to make
+ * getopt_long() stop processing switches */
+
+ for (e = *argv + 1; e < *argv + *argc; e++) {
+ assert(*e);
+
+ if (streq(*e, "--with"))
+ break;
+ }
+
+ if (e >= *argv + *argc || streq_ptr(e[1], "--")) {
+ /* No --with used? Or already followed by "--"? Then don't do anything */
+ *buf = NULL;
+ return 0;
+ }
+
+ /* Insert the extra "--" right after the --with */
+ l = new(char*, *argc + 2);
+ if (!l)
+ return log_oom();
+
+ size_t idx = e - *argv + 1;
+ memcpy(l, *argv, sizeof(char*) * idx); /* copy everything up to and including the --with */
+ l[idx] = (char*) "--"; /* insert "--" */
+ memcpy(l + idx + 1, e + 1, sizeof(char*) * (*argc - idx + 1)); /* copy the rest, including trailing NULL entry */
+
+ (*argc)++;
+ (*argv) = l;
+
+ *buf = TAKE_PTR(l);
+ return 1;
+}
+
+static int parse_image_path_argument(const char *path, char **ret_root, char **ret_image) {
+ _cleanup_free_ char *p = NULL;
+ struct stat st;
+ int r;
+
+ assert(ret_image);
+
+ r = parse_path_argument(path, /* suppress_root= */ false, &p);
+ if (r < 0)
+ return r;
+
+ if (stat(p, &st) < 0)
+ return log_error_errno(errno, "Failed to stat %s: %m", p);
+
+ if (S_ISDIR(st.st_mode)) {
+ if (!ret_root)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "%s is not an image file.", p);
+
+ *ret_root = TAKE_PTR(p);
+ } else
+ *ret_image = TAKE_PTR(p);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_PAGER,
+ ARG_NO_LEGEND,
+ ARG_WITH,
+ ARG_DISCARD,
+ ARG_FSCK,
+ ARG_GROWFS,
+ ARG_ROOT_HASH,
+ ARG_ROOT_HASH_SIG,
+ ARG_VERITY_DATA,
+ ARG_MKDIR,
+ ARG_RMDIR,
+ ARG_IN_MEMORY,
+ ARG_JSON,
+ ARG_MTREE,
+ ARG_DISCOVER,
+ ARG_ATTACH,
+ ARG_DETACH,
+ ARG_LOOP_REF,
+ ARG_IMAGE_POLICY,
+ ARG_VALIDATE,
+ ARG_MTREE_HASH,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "no-legend", no_argument, NULL, ARG_NO_LEGEND },
+ { "mount", no_argument, NULL, 'm' },
+ { "umount", no_argument, NULL, 'u' },
+ { "attach", no_argument, NULL, ARG_ATTACH },
+ { "detach", no_argument, NULL, ARG_DETACH },
+ { "with", no_argument, NULL, ARG_WITH },
+ { "read-only", no_argument, NULL, 'r' },
+ { "discard", required_argument, NULL, ARG_DISCARD },
+ { "fsck", required_argument, NULL, ARG_FSCK },
+ { "growfs", required_argument, NULL, ARG_GROWFS },
+ { "root-hash", required_argument, NULL, ARG_ROOT_HASH },
+ { "root-hash-sig", required_argument, NULL, ARG_ROOT_HASH_SIG },
+ { "verity-data", required_argument, NULL, ARG_VERITY_DATA },
+ { "mkdir", no_argument, NULL, ARG_MKDIR },
+ { "rmdir", no_argument, NULL, ARG_RMDIR },
+ { "in-memory", no_argument, NULL, ARG_IN_MEMORY },
+ { "list", no_argument, NULL, 'l' },
+ { "mtree", no_argument, NULL, ARG_MTREE },
+ { "copy-from", no_argument, NULL, 'x' },
+ { "copy-to", no_argument, NULL, 'a' },
+ { "json", required_argument, NULL, ARG_JSON },
+ { "discover", no_argument, NULL, ARG_DISCOVER },
+ { "loop-ref", required_argument, NULL, ARG_LOOP_REF },
+ { "image-policy", required_argument, NULL, ARG_IMAGE_POLICY },
+ { "validate", no_argument, NULL, ARG_VALIDATE },
+ { "mtree-hash", required_argument, NULL, ARG_MTREE_HASH },
+ {}
+ };
+
+ _cleanup_free_ char **buf = NULL; /* we use free(), not strv_free() here, as we don't copy the strings here */
+ int c, r;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ r = patch_argv(&argc, &argv, &buf);
+ if (r < 0)
+ return r;
+
+ while ((c = getopt_long(argc, argv, "hmurMUlxa", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ return help();
+
+ case ARG_VERSION:
+ return version();
+
+ case ARG_NO_PAGER:
+ arg_pager_flags |= PAGER_DISABLE;
+ break;
+
+ case ARG_NO_LEGEND:
+ arg_legend = false;
+ break;
+
+ case 'm':
+ arg_action = ACTION_MOUNT;
+ break;
+
+ case ARG_MKDIR:
+ arg_flags |= DISSECT_IMAGE_MKDIR;
+ break;
+
+ case 'M':
+ /* Shortcut combination of the above two */
+ arg_action = ACTION_MOUNT;
+ arg_flags |= DISSECT_IMAGE_MKDIR;
+ break;
+
+ case 'u':
+ arg_action = ACTION_UMOUNT;
+ break;
+
+ case ARG_RMDIR:
+ arg_rmdir = true;
+ break;
+
+ case 'U':
+ /* Shortcut combination of the above two */
+ arg_action = ACTION_UMOUNT;
+ arg_rmdir = true;
+ break;
+
+ case ARG_ATTACH:
+ arg_action = ACTION_ATTACH;
+ break;
+
+ case ARG_DETACH:
+ arg_action = ACTION_DETACH;
+ break;
+
+ case 'l':
+ arg_action = ACTION_LIST;
+ arg_flags |= DISSECT_IMAGE_READ_ONLY;
+ break;
+
+ case ARG_MTREE:
+ arg_action = ACTION_MTREE;
+ arg_flags |= DISSECT_IMAGE_READ_ONLY;
+ break;
+
+ case ARG_WITH:
+ arg_action = ACTION_WITH;
+ break;
+
+ case 'x':
+ arg_action = ACTION_COPY_FROM;
+ arg_flags |= DISSECT_IMAGE_READ_ONLY;
+ break;
+
+ case 'a':
+ arg_action = ACTION_COPY_TO;
+ break;
+
+ case 'r':
+ arg_flags |= DISSECT_IMAGE_READ_ONLY;
+ break;
+
+ case ARG_DISCARD: {
+ DissectImageFlags flags;
+
+ if (streq(optarg, "disabled"))
+ flags = 0;
+ else if (streq(optarg, "loop"))
+ flags = DISSECT_IMAGE_DISCARD_ON_LOOP;
+ else if (streq(optarg, "all"))
+ flags = DISSECT_IMAGE_DISCARD_ON_LOOP | DISSECT_IMAGE_DISCARD;
+ else if (streq(optarg, "crypt"))
+ flags = DISSECT_IMAGE_DISCARD_ANY;
+ else if (streq(optarg, "list")) {
+ puts("disabled\n"
+ "all\n"
+ "crypt\n"
+ "loop");
+ return 0;
+ } else
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Unknown --discard= parameter: %s",
+ optarg);
+ arg_flags = (arg_flags & ~DISSECT_IMAGE_DISCARD_ANY) | flags;
+
+ break;
+ }
+
+ case ARG_IN_MEMORY:
+ arg_in_memory = true;
+ break;
+
+ case ARG_ROOT_HASH: {
+ _cleanup_free_ void *p = NULL;
+ size_t l;
+
+ r = unhexmem(optarg, strlen(optarg), &p, &l);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse root hash '%s': %m", optarg);
+ if (l < sizeof(sd_id128_t))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Root hash must be at least 128-bit long: %s", optarg);
+
+ free_and_replace(arg_verity_settings.root_hash, p);
+ arg_verity_settings.root_hash_size = l;
+ break;
+ }
+
+ case ARG_ROOT_HASH_SIG: {
+ char *value;
+ size_t l;
+ void *p;
+
+ if ((value = startswith(optarg, "base64:"))) {
+ r = unbase64mem(value, strlen(value), &p, &l);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse root hash signature '%s': %m", optarg);
+ } else {
+ r = read_full_file(optarg, (char**) &p, &l);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read root hash signature file '%s': %m", optarg);
+ }
+
+ free_and_replace(arg_verity_settings.root_hash_sig, p);
+ arg_verity_settings.root_hash_sig_size = l;
+ break;
+ }
+
+ case ARG_VERITY_DATA:
+ r = parse_path_argument(optarg, false, &arg_verity_settings.data_path);
+ if (r < 0)
+ return r;
+ break;
+
+ case ARG_FSCK:
+ r = parse_boolean(optarg);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse --fsck= parameter: %s", optarg);
+
+ SET_FLAG(arg_flags, DISSECT_IMAGE_FSCK, r);
+ break;
+
+ case ARG_GROWFS:
+ r = parse_boolean(optarg);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse --growfs= parameter: %s", optarg);
+
+ SET_FLAG(arg_flags, DISSECT_IMAGE_GROWFS, r);
+ break;
+
+ case ARG_JSON:
+ r = parse_json_argument(optarg, &arg_json_format_flags);
+ if (r <= 0)
+ return r;
+
+ break;
+
+ case ARG_DISCOVER:
+ arg_action = ACTION_DISCOVER;
+ break;
+
+ case ARG_LOOP_REF:
+ if (isempty(optarg)) {
+ arg_loop_ref = mfree(arg_loop_ref);
+ break;
+ }
+
+ if (strlen(optarg) >= sizeof_field(struct loop_info64, lo_file_name))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Loop device ref string '%s' is too long.", optarg);
+
+ r = free_and_strdup_warn(&arg_loop_ref, optarg);
+ if (r < 0)
+ return r;
+ break;
+
+ case ARG_IMAGE_POLICY:
+ r = parse_image_policy_argument(optarg, &arg_image_policy);
+ if (r < 0)
+ return r;
+ break;
+
+ case ARG_VALIDATE:
+ arg_action = ACTION_VALIDATE;
+ break;
+
+ case ARG_MTREE_HASH:
+ r = parse_boolean_argument("--mtree-hash=", optarg, &arg_mtree_hash);
+ if (r < 0)
+ return r;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached();
+ }
+ }
+
+ switch (arg_action) {
+
+ case ACTION_DISSECT:
+ if (optind + 1 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path as only argument.");
+
+ r = parse_image_path_argument(argv[optind], NULL, &arg_image);
+ if (r < 0)
+ return r;
+
+ /* when dumping image info be even more liberal than otherwise, do not even require a single valid partition */
+ arg_flags |= DISSECT_IMAGE_READ_ONLY|DISSECT_IMAGE_ALLOW_EMPTY;
+ break;
+
+ case ACTION_MOUNT:
+ if (optind + 2 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path and mount point path as only arguments.");
+
+ r = parse_image_path_argument(argv[optind], NULL, &arg_image);
+ if (r < 0)
+ return r;
+
+ r = parse_path_argument(argv[optind+1], /* suppress_root= */ false, &arg_path);
+ if (r < 0)
+ return r;
+
+ arg_flags |= DISSECT_IMAGE_REQUIRE_ROOT;
+ break;
+
+ case ACTION_UMOUNT:
+ if (optind + 1 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected a mount point path as only argument.");
+
+ r = parse_path_argument(argv[optind], /* suppress_root= */ false, &arg_path);
+ if (r < 0)
+ return r;
+ break;
+
+ case ACTION_ATTACH:
+ if (optind + 1 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path as only argument.");
+
+ r = parse_image_path_argument(argv[optind], NULL, &arg_image);
+ if (r < 0)
+ return r;
+ break;
+
+ case ACTION_DETACH:
+ if (optind + 1 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path or loopback device as only argument.");
+
+ r = parse_image_path_argument(argv[optind], NULL, &arg_image);
+ if (r < 0)
+ return r;
+ break;
+
+ case ACTION_LIST:
+ case ACTION_MTREE:
+ if (optind + 1 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file or directory path as only argument.");
+
+ r = parse_image_path_argument(argv[optind], &arg_root, &arg_image);
+ if (r < 0)
+ return r;
+
+ arg_flags |= DISSECT_IMAGE_READ_ONLY | DISSECT_IMAGE_REQUIRE_ROOT;
+ break;
+
+ case ACTION_COPY_FROM:
+ if (argc < optind + 2 || argc > optind + 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file or directory path, a source path and an optional destination path as only arguments.");
+
+ r = parse_image_path_argument(argv[optind], &arg_root, &arg_image);
+ if (r < 0)
+ return r;
+ arg_source = argv[optind + 1];
+ arg_target = argc > optind + 2 ? argv[optind + 2] : "-" /* this means stdout */ ;
+
+ arg_flags |= DISSECT_IMAGE_READ_ONLY | DISSECT_IMAGE_REQUIRE_ROOT;
+ break;
+
+ case ACTION_COPY_TO:
+ if (argc < optind + 2 || argc > optind + 3)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file or directory path, an optional source path and a destination path as only arguments.");
+
+ r = parse_image_path_argument(argv[optind], &arg_root, &arg_image);
+ if (r < 0)
+ return r;
+
+ if (argc > optind + 2) {
+ arg_source = argv[optind + 1];
+ arg_target = argv[optind + 2];
+ } else {
+ arg_source = "-"; /* this means stdin */
+ arg_target = argv[optind + 1];
+ }
+
+ arg_flags |= DISSECT_IMAGE_REQUIRE_ROOT;
+ break;
+
+ case ACTION_WITH:
+ if (optind >= argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path and an optional command line.");
+
+ r = parse_image_path_argument(argv[optind], NULL, &arg_image);
+ if (r < 0)
+ return r;
+
+ if (argc > optind + 1) {
+ arg_argv = strv_copy(argv + optind + 1);
+ if (!arg_argv)
+ return log_oom();
+ }
+
+ break;
+
+ case ACTION_DISCOVER:
+ if (optind != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected no argument.");
+ break;
+
+ case ACTION_VALIDATE:
+ if (optind + 1 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path as only argument.");
+
+ r = parse_image_path_argument(argv[optind], NULL, &arg_image);
+ if (r < 0)
+ return r;
+
+ arg_flags |= DISSECT_IMAGE_READ_ONLY;
+ arg_flags &= ~(DISSECT_IMAGE_PIN_PARTITION_DEVICES|DISSECT_IMAGE_ADD_PARTITION_DEVICES);
+ break;
+
+ default:
+ assert_not_reached();
+ }
+
+ return 1;
+}
+
+static int parse_argv_as_mount_helper(int argc, char *argv[]) {
+ const char *options = NULL;
+ bool fake = false;
+ int c, r;
+
+ /* Implements util-linux "external helper" command line interface, as per mount(8) man page. */
+
+ while ((c = getopt(argc, argv, "sfnvN:o:t:")) >= 0) {
+ switch(c) {
+
+ case 'f':
+ fake = true;
+ break;
+
+ case 'o':
+ options = optarg;
+ break;
+
+ case 't':
+ if (!streq(optarg, "ddi"))
+ log_debug("Unexpected file system type '%s', ignoring.", optarg);
+ break;
+
+ case 's': /* sloppy mount options */
+ case 'n': /* aka --no-mtab */
+ case 'v': /* aka --verbose */
+ log_debug("Ignoring option -%c, not implemented.", c);
+ break;
+
+ case 'N': /* aka --namespace= */
+ return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Option -%c is not implemented, refusing.", c);
+
+ case '?':
+ return -EINVAL;
+ }
+ }
+
+ if (optind + 2 != argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Expected an image file path and target directory as only argument.");
+
+ for (const char *p = options;;) {
+ _cleanup_free_ char *word = NULL;
+
+ r = extract_first_word(&p, &word, ",", EXTRACT_KEEP_QUOTE);
+ if (r < 0)
+ return log_error_errno(r, "Failed to extract mount option: %m");
+ if (r == 0)
+ break;
+
+ if (streq(word, "ro"))
+ SET_FLAG(arg_flags, DISSECT_IMAGE_READ_ONLY, true);
+ else if (streq(word, "rw"))
+ SET_FLAG(arg_flags, DISSECT_IMAGE_READ_ONLY, false);
+ else if (streq(word, "discard"))
+ SET_FLAG(arg_flags, DISSECT_IMAGE_DISCARD_ANY, true);
+ else if (streq(word, "nodiscard"))
+ SET_FLAG(arg_flags, DISSECT_IMAGE_DISCARD_ANY, false);
+ else
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Unknown mount option '%s'.", word);
+ }
+
+ if (fake)
+ return 0;
+
+ r = parse_path_argument(argv[optind], /* suppress_root= */ false, &arg_image);
+ if (r < 0)
+ return r;
+
+ r = parse_path_argument(argv[optind+1], /* suppress_root= */ false, &arg_path);
+ if (r < 0)
+ return r;
+
+ arg_flags |= DISSECT_IMAGE_REQUIRE_ROOT;
+ arg_action = ACTION_MOUNT;
+ return 1;
+}
+
+static void strv_pair_print(char **l, const char *prefix) {
+ assert(prefix);
+
+ STRV_FOREACH_PAIR(p, q, l)
+ if (p == l)
+ printf("%s %s=%s\n", prefix, *p, *q);
+ else
+ printf("%*s %s=%s\n", (int) strlen(prefix), "", *p, *q);
+}
+
+static int get_extension_scopes(DissectedImage *m, ImageClass class, char ***ret_scopes) {
+ _cleanup_strv_free_ char **l = NULL;
+ const char *e, *field_name;
+ char **release_data;
+
+ assert(m);
+ assert(ret_scopes);
+
+ switch (class) {
+
+ case IMAGE_SYSEXT:
+ release_data = m->sysext_release;
+ field_name = "SYSEXT_SCOPE";
+ break;
+
+ case IMAGE_CONFEXT:
+ release_data = m->confext_release;
+ field_name = "CONFEXT_SCOPE";
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ /* If there's no extension-release file its not a system extension. Otherwise the SYSEXT_SCOPE
+ * field for sysext images and the CONFEXT_SCOPE field for confext images indicates which scope
+ * it is for — and it defaults to "system" + "portable" if unset. */
+
+ if (!release_data) {
+ *ret_scopes = NULL;
+ return 0;
+ }
+
+ e = strv_env_pairs_get(release_data, field_name);
+ if (e)
+ l = strv_split(e, WHITESPACE);
+ else
+ l = strv_new("system", "portable");
+ if (!l)
+ return -ENOMEM;
+
+ *ret_scopes = TAKE_PTR(l);
+ return 1;
+}
+
+static int action_dissect(DissectedImage *m, LoopDevice *d) {
+ _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+ _cleanup_(table_unrefp) Table *t = NULL;
+ _cleanup_free_ char *bn = NULL;
+ uint64_t size = UINT64_MAX;
+ int r;
+
+ assert(m);
+ assert(d);
+
+ r = path_extract_filename(arg_image, &bn);
+ if (r < 0)
+ return log_error_errno(r, "Failed to extract file name from image path '%s': %m", arg_image);
+
+ if (arg_json_format_flags & (JSON_FORMAT_OFF|JSON_FORMAT_PRETTY|JSON_FORMAT_PRETTY_AUTO))
+ pager_open(arg_pager_flags);
+
+ if (arg_json_format_flags & JSON_FORMAT_OFF)
+ printf(" Name: %s%s%s\n", ansi_highlight(), bn, ansi_normal());
+
+ if (ioctl(d->fd, BLKGETSIZE64, &size) < 0)
+ log_debug_errno(errno, "Failed to query size of loopback device: %m");
+ else if (arg_json_format_flags & JSON_FORMAT_OFF)
+ printf(" Size: %s\n", FORMAT_BYTES(size));
+
+ if (arg_json_format_flags & JSON_FORMAT_OFF) {
+ printf(" Sec. Size: %" PRIu32 "\n", m->sector_size);
+
+ printf(" Arch.: %s\n",
+ strna(architecture_to_string(dissected_image_architecture(m))));
+
+ putc('\n', stdout);
+ fflush(stdout);
+ }
+
+ r = dissected_image_acquire_metadata(m, 0);
+ if (r == -ENXIO)
+ return log_error_errno(r, "No root partition discovered.");
+ if (r == -EUCLEAN)
+ return log_error_errno(r, "File system check of image failed.");
+ if (r == -EMEDIUMTYPE)
+ log_warning_errno(r, "Not a valid OS image, no os-release file included. Proceeding anyway.");
+ else if (r == -EUNATCH)
+ log_warning_errno(r, "OS image is encrypted, proceeding without showing OS image metadata.");
+ else if (r == -EBUSY)
+ log_warning_errno(r, "OS image is currently in use, proceeding without showing OS image metadata.");
+ else if (r < 0)
+ return log_error_errno(r, "Failed to acquire image metadata: %m");
+ else if (arg_json_format_flags & JSON_FORMAT_OFF) {
+
+ if (!sd_id128_is_null(m->image_uuid))
+ printf("Image UUID: %s\n", SD_ID128_TO_UUID_STRING(m->image_uuid));
+
+ if (m->hostname)
+ printf(" Hostname: %s\n", m->hostname);
+
+ if (!sd_id128_is_null(m->machine_id))
+ printf("Machine ID: " SD_ID128_FORMAT_STR "\n", SD_ID128_FORMAT_VAL(m->machine_id));
+
+ strv_pair_print(m->machine_info,
+ "Mach. Info:");
+ strv_pair_print(m->os_release,
+ "OS Release:");
+ strv_pair_print(m->initrd_release,
+ "initrd R.:");
+ strv_pair_print(m->sysext_release,
+ " sysext R.:");
+ strv_pair_print(m->confext_release,
+ "confext R.:");
+
+ if (m->hostname ||
+ !sd_id128_is_null(m->machine_id) ||
+ !strv_isempty(m->machine_info) ||
+ !strv_isempty(m->os_release) ||
+ !strv_isempty(m->initrd_release) ||
+ !strv_isempty(m->sysext_release) ||
+ !strv_isempty(m->confext_release))
+ putc('\n', stdout);
+
+ printf(" Use As: %s bootable system for UEFI\n",
+ COLOR_MARK_BOOL(dissected_image_is_bootable_uefi(m)));
+ printf(" %s bootable system for container\n",
+ COLOR_MARK_BOOL(dissected_image_is_bootable_os(m)));
+ printf(" %s portable service\n",
+ COLOR_MARK_BOOL(dissected_image_is_portable(m)));
+ printf(" %s initrd\n",
+ COLOR_MARK_BOOL(dissected_image_is_initrd(m)));
+
+ for (ImageClass c = _IMAGE_CLASS_EXTENSION_FIRST; c <= _IMAGE_CLASS_EXTENSION_LAST; c++) {
+ const char *string_class = image_class_to_string(c);
+ _cleanup_strv_free_ char **extension_scopes = NULL;
+
+ r = get_extension_scopes(m, c, &extension_scopes);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse scopes: %m");
+
+ printf(" %s %s for system\n",
+ COLOR_MARK_BOOL(strv_contains(extension_scopes, "system")), string_class);
+ printf(" %s %s for portable service\n",
+ COLOR_MARK_BOOL(strv_contains(extension_scopes, "portable")), string_class);
+ printf(" %s %s for initrd\n",
+ COLOR_MARK_BOOL(strv_contains(extension_scopes, "initrd")), string_class);
+ }
+
+ putc('\n', stdout);
+ } else {
+ _cleanup_strv_free_ char **sysext_scopes = NULL, **confext_scopes = NULL;
+
+ r = get_extension_scopes(m, IMAGE_SYSEXT, &sysext_scopes);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse sysext scopes: %m");
+
+ r = get_extension_scopes(m, IMAGE_CONFEXT, &confext_scopes);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse confext scopes: %m");
+
+ Architecture a = dissected_image_architecture(m);
+
+ r = json_build(&v, JSON_BUILD_OBJECT(
+ JSON_BUILD_PAIR("name", JSON_BUILD_STRING(bn)),
+ JSON_BUILD_PAIR_CONDITION(size != UINT64_MAX, "size", JSON_BUILD_INTEGER(size)),
+ JSON_BUILD_PAIR("sectorSize", JSON_BUILD_INTEGER(m->sector_size)),
+ JSON_BUILD_PAIR_CONDITION(a >= 0, "architecture", JSON_BUILD_STRING(architecture_to_string(a))),
+ JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(m->image_uuid), "imageUuid", JSON_BUILD_UUID(m->image_uuid)),
+ JSON_BUILD_PAIR_CONDITION(m->hostname, "hostname", JSON_BUILD_STRING(m->hostname)),
+ JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(m->machine_id), "machineId", JSON_BUILD_ID128(m->machine_id)),
+ JSON_BUILD_PAIR_CONDITION(!strv_isempty(m->machine_info), "machineInfo", JSON_BUILD_STRV_ENV_PAIR(m->machine_info)),
+ JSON_BUILD_PAIR_CONDITION(!strv_isempty(m->os_release), "osRelease", JSON_BUILD_STRV_ENV_PAIR(m->os_release)),
+ JSON_BUILD_PAIR_CONDITION(!strv_isempty(m->initrd_release), "initrdRelease", JSON_BUILD_STRV_ENV_PAIR(m->initrd_release)),
+ JSON_BUILD_PAIR_CONDITION(!strv_isempty(m->sysext_release), "sysextRelease", JSON_BUILD_STRV_ENV_PAIR(m->sysext_release)),
+ JSON_BUILD_PAIR_CONDITION(!strv_isempty(m->confext_release), "confextRelease", JSON_BUILD_STRV_ENV_PAIR(m->confext_release)),
+ JSON_BUILD_PAIR("useBootableUefi", JSON_BUILD_BOOLEAN(dissected_image_is_bootable_uefi(m))),
+ JSON_BUILD_PAIR("useBootableContainer", JSON_BUILD_BOOLEAN(dissected_image_is_bootable_os(m))),
+ JSON_BUILD_PAIR("useInitrd", JSON_BUILD_BOOLEAN(dissected_image_is_initrd(m))),
+ JSON_BUILD_PAIR("usePortableService", JSON_BUILD_BOOLEAN(dissected_image_is_portable(m))),
+ JSON_BUILD_PAIR("useSystemExtension", JSON_BUILD_BOOLEAN(strv_contains(sysext_scopes, "system"))),
+ JSON_BUILD_PAIR("useInitRDSystemExtension", JSON_BUILD_BOOLEAN(strv_contains(sysext_scopes, "initrd"))),
+ JSON_BUILD_PAIR("usePortableSystemExtension", JSON_BUILD_BOOLEAN(strv_contains(sysext_scopes, "portable"))),
+ JSON_BUILD_PAIR("useConfigurationExtension", JSON_BUILD_BOOLEAN(strv_contains(confext_scopes, "system"))),
+ JSON_BUILD_PAIR("useInitRDConfigurationExtension", JSON_BUILD_BOOLEAN(strv_contains(confext_scopes, "initrd"))),
+ JSON_BUILD_PAIR("usePortableConfigurationExtension", JSON_BUILD_BOOLEAN(strv_contains(confext_scopes, "portable")))));
+ if (r < 0)
+ return log_oom();
+ }
+
+ t = table_new("rw", "designator", "partition uuid", "partition label", "fstype", "architecture", "verity", "growfs", "node", "partno");
+ if (!t)
+ return log_oom();
+
+ table_set_ersatz_string(t, TABLE_ERSATZ_DASH);
+ (void) table_set_align_percent(t, table_get_cell(t, 0, 9), 100);
+
+ for (PartitionDesignator i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) {
+ DissectedPartition *p = m->partitions + i;
+
+ if (!p->found)
+ continue;
+
+ r = table_add_many(
+ t,
+ TABLE_STRING, p->rw ? "rw" : "ro",
+ TABLE_STRING, partition_designator_to_string(i));
+ if (r < 0)
+ return table_log_add_error(r);
+
+ if (sd_id128_is_null(p->uuid))
+ r = table_add_cell(t, NULL, TABLE_EMPTY, NULL);
+ else
+ r = table_add_cell(t, NULL, TABLE_UUID, &p->uuid);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ r = table_add_many(
+ t,
+ TABLE_STRING, p->label,
+ TABLE_STRING, p->fstype,
+ TABLE_STRING, architecture_to_string(p->architecture));
+ if (r < 0)
+ return table_log_add_error(r);
+
+ if (arg_verity_settings.data_path)
+ r = table_add_cell(t, NULL, TABLE_STRING, "external");
+ else if (dissected_image_verity_candidate(m, i))
+ r = table_add_cell(t, NULL, TABLE_STRING,
+ dissected_image_verity_sig_ready(m, i) ? "signed" :
+ yes_no(dissected_image_verity_ready(m, i)));
+ else
+ r = table_add_cell(t, NULL, TABLE_EMPTY, NULL);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ r = table_add_many(t, TABLE_BOOLEAN, (int) p->growfs);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ if (p->partno < 0) /* no partition table, naked file system */ {
+ r = table_add_cell(t, NULL, TABLE_PATH_BASENAME, arg_image);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ r = table_add_cell(t, NULL, TABLE_EMPTY, NULL);
+ } else {
+ r = table_add_cell(t, NULL, TABLE_STRING, p->node);
+ if (r < 0)
+ return table_log_add_error(r);
+
+ r = table_add_cell(t, NULL, TABLE_INT, &p->partno);
+ }
+ if (r < 0)
+ return table_log_add_error(r);
+ }
+
+ if (arg_json_format_flags & JSON_FORMAT_OFF) {
+ (void) table_set_header(t, arg_legend);
+
+ r = table_print(t, NULL);
+ if (r < 0)
+ return table_log_print_error(r);
+ } else {
+ _cleanup_(json_variant_unrefp) JsonVariant *jt = NULL;
+
+ r = table_to_json(t, &jt);
+ if (r < 0)
+ return log_error_errno(r, "Failed to convert table to JSON: %m");
+
+ r = json_variant_set_field(&v, "mounts", jt);
+ if (r < 0)
+ return log_oom();
+
+ json_variant_dump(v, arg_json_format_flags, stdout, NULL);
+ }
+
+ return 0;
+}
+
+static int action_mount(DissectedImage *m, LoopDevice *d) {
+ int r;
+
+ assert(m);
+ assert(d);
+ assert(arg_action == ACTION_MOUNT);
+
+ r = dissected_image_mount_and_warn(
+ m,
+ arg_path,
+ /* uid_shift= */ UID_INVALID,
+ /* uid_range= */ UID_INVALID,
+ /* userns_fd= */ -EBADF,
+ arg_flags);
+ if (r < 0)
+ return r;
+
+ r = loop_device_flock(d, LOCK_UN);
+ if (r < 0)
+ return log_error_errno(r, "Failed to unlock loopback block device: %m");
+
+ r = dissected_image_relinquish(m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to relinquish DM and loopback block devices: %m");
+
+ return 0;
+}
+
+static int list_print_item(
+ RecurseDirEvent event,
+ const char *path,
+ int dir_fd,
+ int inode_fd,
+ const struct dirent *de,
+ const struct statx *sx,
+ void *userdata) {
+
+ assert(path);
+
+ if (event == RECURSE_DIR_ENTER)
+ printf("%s%s/%s\n", path, ansi_grey(), ansi_normal());
+ else if (event == RECURSE_DIR_ENTRY)
+ printf("%s\n", path);
+
+ return RECURSE_DIR_CONTINUE;
+}
+
+static int get_file_sha256(int inode_fd, uint8_t ret[static SHA256_DIGEST_SIZE]) {
+ _cleanup_close_ int fd = -EBADF;
+ struct sha256_ctx ctx;
+
+ /* convert O_PATH fd into a regular one */
+ fd = fd_reopen(inode_fd, O_RDONLY|O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ /* Calculating the SHA sum might be slow, hence let's flush STDOUT first, to give user an idea where we are slow. */
+ fflush(stdout);
+
+ sha256_init_ctx(&ctx);
+
+ for (;;) {
+ uint8_t buffer[64 * 1024];
+ ssize_t n;
+
+ n = read(fd, buffer, sizeof(buffer));
+ if (n < 0)
+ return -errno;
+ if (n == 0)
+ break;
+
+ sha256_process_bytes(buffer, n, &ctx);
+ }
+
+ sha256_finish_ctx(&ctx, ret);
+ return 0;
+}
+
+static const char *pick_color_for_uid_gid(uid_t uid) {
+ if (uid == UID_NOBODY)
+ return ansi_highlight_yellow4(); /* files should never be owned by 'nobody' (but might happen due to userns mapping) */
+ if (uid_is_system(uid))
+ return ansi_normal(); /* files in disk images are typically owned by root and other system users, no issue there */
+ if (uid_is_dynamic(uid))
+ return ansi_highlight_red(); /* files should never be owned persistently by dynamic users, and there are just no excuses */
+ if (uid_is_container(uid))
+ return ansi_highlight_cyan();
+
+ return ansi_highlight();
+}
+
+static int mtree_print_item(
+ RecurseDirEvent event,
+ const char *path,
+ int dir_fd,
+ int inode_fd,
+ const struct dirent *de,
+ const struct statx *sx,
+ void *userdata) {
+
+ _cleanup_free_ char *escaped = NULL;
+ int r;
+
+ assert(path);
+
+ if (!IN_SET(event, RECURSE_DIR_ENTER, RECURSE_DIR_ENTRY))
+ return RECURSE_DIR_CONTINUE;
+
+ assert(sx);
+
+ if (isempty(path))
+ path = ".";
+ else {
+ /* BSD mtree uses either C or octal escaping, and covers whitespace, comments and glob characters. We use C style escaping and follow suit */
+ path = escaped = xescape(path, WHITESPACE COMMENTS GLOB_CHARS);
+ if (!escaped)
+ return log_oom();
+ }
+
+ printf("%s", isempty(path) ? "." : path);
+
+ if (FLAGS_SET(sx->stx_mask, STATX_TYPE)) {
+ if (S_ISDIR(sx->stx_mode))
+ printf("%s/%s", ansi_grey(), ansi_normal());
+
+ printf(" %stype=%s%s%s%s",
+ ansi_grey(),
+ ansi_normal(),
+ S_ISDIR(sx->stx_mode) ? ansi_highlight_blue() :
+ S_ISLNK(sx->stx_mode) ? ansi_highlight_cyan() :
+ (S_ISFIFO(sx->stx_mode) || S_ISCHR(sx->stx_mode) || S_ISBLK(sx->stx_mode)) ? ansi_highlight_yellow4() :
+ S_ISSOCK(sx->stx_mode) ? ansi_highlight_magenta() : "",
+ ASSERT_PTR(S_ISDIR(sx->stx_mode) ? "dir" :
+ S_ISREG(sx->stx_mode) ? "file" :
+ S_ISLNK(sx->stx_mode) ? "link" :
+ S_ISFIFO(sx->stx_mode) ? "fifo" :
+ S_ISBLK(sx->stx_mode) ? "block" :
+ S_ISCHR(sx->stx_mode) ? "char" :
+ S_ISSOCK(sx->stx_mode) ? "socket" : NULL),
+ ansi_normal());
+ }
+
+ if (FLAGS_SET(sx->stx_mask, STATX_MODE) && (!FLAGS_SET(sx->stx_mask, STATX_TYPE) || !S_ISLNK(sx->stx_mode)))
+ printf(" %smode=%s%04o",
+ ansi_grey(),
+ ansi_normal(),
+ (unsigned) (sx->stx_mode & 0777));
+
+ if (FLAGS_SET(sx->stx_mask, STATX_UID))
+ printf(" %suid=%s" UID_FMT "%s",
+ ansi_grey(),
+ pick_color_for_uid_gid(sx->stx_uid),
+ sx->stx_uid,
+ ansi_normal());
+
+ if (FLAGS_SET(sx->stx_mask, STATX_GID))
+ printf(" %sgid=%s" GID_FMT "%s",
+ ansi_grey(),
+ pick_color_for_uid_gid(sx->stx_gid),
+ sx->stx_gid,
+ ansi_normal());
+
+ if (FLAGS_SET(sx->stx_mask, STATX_TYPE|STATX_SIZE) && S_ISREG(sx->stx_mode)) {
+ printf(" %ssize=%s%" PRIu64,
+ ansi_grey(),
+ ansi_normal(),
+ (uint64_t) sx->stx_size);
+
+ if (arg_mtree_hash && inode_fd >= 0 && sx->stx_size > 0) {
+ uint8_t hash[SHA256_DIGEST_SIZE];
+
+ r = get_file_sha256(inode_fd, hash);
+ if (r < 0)
+ log_warning_errno(r, "Failed to calculate file SHA256 sum for '%s', ignoring: %m", path);
+ else {
+ _cleanup_free_ char *h = NULL;
+
+ h = hexmem(hash, sizeof(hash));
+ if (!h)
+ return log_oom();
+
+ printf(" %ssha256sum=%s%s",
+ ansi_grey(),
+ ansi_normal(),
+ h);
+ }
+ }
+ }
+
+ if (FLAGS_SET(sx->stx_mask, STATX_TYPE) && S_ISLNK(sx->stx_mode) && inode_fd >= 0) {
+ _cleanup_free_ char *target = NULL;
+
+ r = readlinkat_malloc(inode_fd, "", &target);
+ if (r < 0)
+ log_warning_errno(r, "Failed to read symlink '%s', ignoring: %m", path);
+ else {
+ _cleanup_free_ char *target_escaped = NULL;
+
+ target_escaped = xescape(target, WHITESPACE COMMENTS GLOB_CHARS);
+ if (!target_escaped)
+ return log_oom();
+
+ printf(" %slink=%s%s",
+ ansi_grey(),
+ ansi_normal(),
+ target_escaped);
+ }
+ }
+
+ if (FLAGS_SET(sx->stx_mask, STATX_TYPE) && (S_ISBLK(sx->stx_mode) || S_ISCHR(sx->stx_mode)))
+ printf(" %sdevice=%slinux,%" PRIu64 ",%" PRIu64,
+ ansi_grey(),
+ ansi_normal(),
+ (uint64_t) sx->stx_rdev_major,
+ (uint64_t) sx->stx_rdev_minor);
+
+ printf("\n");
+
+ return RECURSE_DIR_CONTINUE;
+}
+
+static int action_list_or_mtree_or_copy(DissectedImage *m, LoopDevice *d) {
+ _cleanup_(umount_and_rmdir_and_freep) char *mounted_dir = NULL;
+ _cleanup_(rmdir_and_freep) char *created_dir = NULL;
+ _cleanup_free_ char *temp = NULL;
+ const char *root;
+ int r;
+
+ assert(IN_SET(arg_action, ACTION_LIST, ACTION_MTREE, ACTION_COPY_FROM, ACTION_COPY_TO));
+
+ if (arg_image) {
+ assert(m);
+ assert(d);
+
+ r = detach_mount_namespace();
+ if (r < 0)
+ return log_error_errno(r, "Failed to detach mount namespace: %m");
+
+ r = tempfn_random_child(NULL, program_invocation_short_name, &temp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to generate temporary mount directory: %m");
+
+ r = mkdir_p(temp, 0700);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create mount point: %m");
+
+ created_dir = TAKE_PTR(temp);
+
+ r = dissected_image_mount_and_warn(
+ m,
+ created_dir,
+ /* uid_shift= */ UID_INVALID,
+ /* uid_range= */ UID_INVALID,
+ /* userns_fd= */ -EBADF,
+ arg_flags);
+ if (r < 0)
+ return r;
+
+ mounted_dir = TAKE_PTR(created_dir);
+
+ r = loop_device_flock(d, LOCK_UN);
+ if (r < 0)
+ return log_error_errno(r, "Failed to unlock loopback block device: %m");
+
+ r = dissected_image_relinquish(m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to relinquish DM and loopback block devices: %m");
+ }
+
+ root = mounted_dir ?: arg_root;
+
+ switch (arg_action) {
+
+ case ACTION_COPY_FROM: {
+ _cleanup_close_ int source_fd = -EBADF, target_fd = -EBADF;
+
+ source_fd = chase_and_open(arg_source, root, CHASE_PREFIX_ROOT|CHASE_WARN, O_RDONLY|O_CLOEXEC|O_NOCTTY, NULL);
+ if (source_fd < 0)
+ return log_error_errno(source_fd, "Failed to open source path '%s' in image '%s': %m", arg_source, arg_image);
+
+ /* Copying to stdout? */
+ if (streq(arg_target, "-")) {
+ r = copy_bytes(source_fd, STDOUT_FILENO, UINT64_MAX, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from %s in mage '%s' to stdout: %m", arg_source, arg_image);
+
+ /* When we copy to stdout we don't copy any attributes (i.e. no access mode, no ownership, no xattr, no times) */
+ return 0;
+ }
+
+ /* Try to copy as directory? */
+ r = copy_directory_at(source_fd, NULL, AT_FDCWD, arg_target, COPY_REFLINK|COPY_MERGE_EMPTY|COPY_SIGINT|COPY_HARDLINKS);
+ if (r >= 0)
+ return 0;
+ if (r != -ENOTDIR)
+ return log_error_errno(r, "Failed to copy %s in image '%s' to '%s': %m", arg_source, arg_image, arg_target);
+
+ r = fd_verify_regular(source_fd);
+ if (r == -EISDIR)
+ return log_error_errno(r, "Target '%s' exists already and is not a directory.", arg_target);
+ if (r < 0)
+ return log_error_errno(r, "Source path %s in image '%s' is neither regular file nor directory, refusing: %m", arg_source, arg_image);
+
+ /* Nah, it's a plain file! */
+ target_fd = open(arg_target, O_WRONLY|O_CREAT|O_EXCL|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600);
+ if (target_fd < 0)
+ return log_error_errno(errno, "Failed to create regular file at target path '%s': %m", arg_target);
+
+ r = copy_bytes(source_fd, target_fd, UINT64_MAX, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from %s in mage '%s' to '%s': %m", arg_source, arg_image, arg_target);
+
+ (void) copy_xattr(source_fd, NULL, target_fd, NULL, 0);
+ (void) copy_access(source_fd, target_fd);
+ (void) copy_times(source_fd, target_fd, 0);
+
+ /* When this is a regular file we don't copy ownership! */
+ return 0;
+ }
+
+ case ACTION_COPY_TO: {
+ _cleanup_close_ int source_fd = -EBADF, target_fd = -EBADF, dfd = -EBADF;
+ _cleanup_free_ char *dn = NULL, *bn = NULL;
+ bool is_dir;
+
+ r = path_extract_directory(arg_target, &dn);
+ if (r < 0)
+ return log_error_errno(r, "Failed to extract directory from target path '%s': %m", arg_target);
+ r = path_extract_filename(arg_target, &bn);
+ if (r < 0)
+ return log_error_errno(r, "Failed to extract filename from target path '%s': %m", arg_target);
+ is_dir = r == O_DIRECTORY;
+
+ r = chase(dn, root, CHASE_PREFIX_ROOT|CHASE_WARN, NULL, &dfd);
+ if (r < 0)
+ return log_error_errno(r, "Failed to open '%s': %m", dn);
+
+ /* Are we reading from stdin? */
+ if (streq(arg_source, "-")) {
+ if (is_dir)
+ return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Cannot copy STDIN to a directory, refusing.");
+
+ target_fd = openat(dfd, bn, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_EXCL, 0644);
+ if (target_fd < 0)
+ return log_error_errno(errno, "Failed to open target file '%s': %m", arg_target);
+
+ r = copy_bytes(STDIN_FILENO, target_fd, UINT64_MAX, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from stdin to '%s' in image '%s': %m", arg_target, arg_image);
+
+ /* When we copy from stdin we don't copy any attributes (i.e. no access mode, no ownership, no xattr, no times) */
+ return 0;
+ }
+
+ source_fd = open(arg_source, O_RDONLY|O_CLOEXEC|O_NOCTTY);
+ if (source_fd < 0)
+ return log_error_errno(source_fd, "Failed to open source path '%s': %m", arg_source);
+
+ r = fd_verify_regular(source_fd);
+ if (r < 0) {
+ if (r != -EISDIR)
+ return log_error_errno(r, "Source '%s' is neither regular file nor directory: %m", arg_source);
+
+ /* We are looking at a directory. */
+
+ target_fd = openat(dfd, bn, O_RDONLY|O_DIRECTORY|O_CLOEXEC);
+ if (target_fd < 0) {
+ if (errno != ENOENT)
+ return log_error_errno(errno, "Failed to open destination '%s': %m", arg_target);
+
+ r = copy_tree_at(source_fd, ".", dfd, bn, UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_REPLACE|COPY_SIGINT|COPY_HARDLINKS, NULL, NULL);
+ } else
+ r = copy_tree_at(source_fd, ".", target_fd, ".", UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_REPLACE|COPY_SIGINT|COPY_HARDLINKS, NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy '%s' to '%s' in image '%s': %m", arg_source, arg_target, arg_image);
+
+ return 0;
+ }
+
+ if (is_dir)
+ return log_error_errno(SYNTHETIC_ERRNO(EISDIR), "Source is a regular file, but target is not, refusing.");
+
+ /* We area looking at a regular file */
+ target_fd = openat(dfd, bn, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_EXCL, 0600);
+ if (target_fd < 0)
+ return log_error_errno(errno, "Failed to open target file '%s': %m", arg_target);
+
+ r = copy_bytes(source_fd, target_fd, UINT64_MAX, COPY_REFLINK);
+ if (r < 0)
+ return log_error_errno(r, "Failed to copy bytes from '%s' to '%s' in image '%s': %m", arg_source, arg_target, arg_image);
+
+ (void) copy_xattr(source_fd, NULL, target_fd, NULL, 0);
+ (void) copy_access(source_fd, target_fd);
+ (void) copy_times(source_fd, target_fd, 0);
+
+ /* When this is a regular file we don't copy ownership! */
+ return 0;
+ }
+
+ case ACTION_LIST:
+ case ACTION_MTREE: {
+ _cleanup_close_ int dfd = -EBADF;
+
+ dfd = open(root, O_DIRECTORY|O_CLOEXEC|O_RDONLY);
+ if (dfd < 0)
+ return log_error_errno(errno, "Failed to open mount directory: %m");
+
+ pager_open(arg_pager_flags);
+
+ if (arg_action == ACTION_LIST)
+ r = recurse_dir(dfd, NULL, 0, UINT_MAX, RECURSE_DIR_SORT, list_print_item, NULL);
+ else if (arg_action == ACTION_MTREE)
+ r = recurse_dir(dfd, ".", STATX_TYPE|STATX_MODE|STATX_UID|STATX_GID|STATX_SIZE, UINT_MAX, RECURSE_DIR_SORT|RECURSE_DIR_INODE_FD|RECURSE_DIR_TOPLEVEL, mtree_print_item, NULL);
+ else
+ assert_not_reached();
+ if (r < 0)
+ return log_error_errno(r, "Failed to list image: %m");
+ return 0;
+ }
+
+ default:
+ assert_not_reached();
+ }
+}
+
+static int action_umount(const char *path) {
+ _cleanup_close_ int fd = -EBADF;
+ _cleanup_free_ char *canonical = NULL;
+ _cleanup_(loop_device_unrefp) LoopDevice *d = NULL;
+ _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+ int r;
+
+ fd = chase_and_open(path, NULL, 0, O_DIRECTORY, &canonical);
+ if (fd == -ENOTDIR)
+ return log_error_errno(SYNTHETIC_ERRNO(ENOTDIR), "'%s' is not a directory", path);
+ if (fd < 0)
+ return log_error_errno(fd, "Failed to resolve path '%s': %m", path);
+
+ r = fd_is_mount_point(fd, NULL, 0);
+ if (r == 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "'%s' is not a mount point", canonical);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine whether '%s' is a mount point: %m", canonical);
+
+ r = block_device_new_from_fd(fd, BLOCK_DEVICE_LOOKUP_WHOLE_DISK | BLOCK_DEVICE_LOOKUP_BACKING, &dev);
+ if (r < 0) {
+ _cleanup_close_ int usr_fd = -EBADF;
+
+ /* The command `systemd-dissect --mount` expects that the image at least has the root or /usr
+ * partition. If it does not have the root partition, then we mount the /usr partition on a
+ * tmpfs. Hence, let's try to find the backing block device through the /usr partition. */
+
+ usr_fd = openat(fd, "usr", O_CLOEXEC | O_DIRECTORY | O_NOFOLLOW);
+ if (usr_fd < 0)
+ return log_error_errno(errno, "Failed to open '%s/usr': %m", canonical);
+
+ r = block_device_new_from_fd(usr_fd, BLOCK_DEVICE_LOOKUP_WHOLE_DISK | BLOCK_DEVICE_LOOKUP_BACKING, &dev);
+ }
+ if (r < 0)
+ return log_error_errno(r, "Failed to find backing block device for '%s': %m", canonical);
+
+ r = loop_device_open(dev, 0, LOCK_EX, &d);
+ if (r < 0)
+ return log_device_error_errno(dev, r, "Failed to open loopback block device: %m");
+
+ /* We've locked the loop device, now we're ready to unmount. To allow the unmount to succeed, we have
+ * to close the O_PATH fd we opened earlier. */
+ fd = safe_close(fd);
+
+ r = umount_recursive(canonical, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to unmount '%s': %m", canonical);
+
+ /* We managed to lock and unmount successfully? That means we can try to remove the loop device. */
+ loop_device_unrelinquish(d);
+
+ if (arg_rmdir) {
+ r = RET_NERRNO(rmdir(canonical));
+ if (r < 0)
+ return log_error_errno(r, "Failed to remove mount directory '%s': %m", canonical);
+ }
+
+ return 0;
+}
+
+static int action_with(DissectedImage *m, LoopDevice *d) {
+ _cleanup_(umount_and_rmdir_and_freep) char *mounted_dir = NULL;
+ _cleanup_(rmdir_and_freep) char *created_dir = NULL;
+ _cleanup_free_ char *temp = NULL;
+ int r, rcode;
+
+ assert(m);
+ assert(d);
+ assert(arg_action == ACTION_WITH);
+
+ r = tempfn_random_child(NULL, program_invocation_short_name, &temp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to generate temporary mount directory: %m");
+
+ r = mkdir_p(temp, 0700);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create mount point: %m");
+
+ created_dir = TAKE_PTR(temp);
+
+ r = dissected_image_mount_and_warn(
+ m,
+ created_dir,
+ /* uid_shift= */ UID_INVALID,
+ /* uid_range= */ UID_INVALID,
+ /* userns_fd= */ -EBADF,
+ arg_flags);
+ if (r < 0)
+ return r;
+
+ mounted_dir = TAKE_PTR(created_dir);
+
+ r = dissected_image_relinquish(m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to relinquish DM and loopback block devices: %m");
+
+ r = loop_device_flock(d, LOCK_UN);
+ if (r < 0)
+ return log_error_errno(r, "Failed to unlock loopback block device: %m");
+
+ rcode = safe_fork("(with)", FORK_CLOSE_ALL_FDS|FORK_LOG|FORK_WAIT, NULL);
+ if (rcode == 0) {
+ /* Child */
+
+ if (chdir(mounted_dir) < 0) {
+ log_error_errno(errno, "Failed to change to '%s' directory: %m", mounted_dir);
+ _exit(EXIT_FAILURE);
+ }
+
+ if (setenv("SYSTEMD_DISSECT_ROOT", mounted_dir, /* overwrite= */ true) < 0) {
+ log_error_errno(errno, "Failed to set $SYSTEMD_DISSECT_ROOT: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ if (setenv("SYSTEMD_DISSECT_DEVICE", d->node, /* overwrite= */ true) < 0) {
+ log_error_errno(errno, "Failed to set $SYSTEMD_DISSECT_DEVICE: %m");
+ _exit(EXIT_FAILURE);
+ }
+
+ if (strv_isempty(arg_argv)) {
+ const char *sh;
+
+ sh = secure_getenv("SHELL");
+ if (sh) {
+ execvp(sh, STRV_MAKE(sh));
+ log_warning_errno(errno, "Failed to execute $SHELL, falling back to /bin/sh: %m");
+ }
+
+ execl("/bin/sh", "sh", NULL);
+ log_error_errno(errno, "Failed to invoke /bin/sh: %m");
+ } else {
+ execvp(arg_argv[0], arg_argv);
+ log_error_errno(errno, "Failed to execute '%s': %m", arg_argv[0]);
+ }
+
+ _exit(EXIT_FAILURE);
+ }
+
+ /* Let's manually detach everything, to make things synchronous */
+ r = loop_device_flock(d, LOCK_SH);
+ if (r < 0)
+ log_warning_errno(r, "Failed to lock loopback block device, ignoring: %m");
+
+ r = umount_recursive(mounted_dir, 0);
+ if (r < 0)
+ log_warning_errno(r, "Failed to unmount '%s', ignoring: %m", mounted_dir);
+ else
+ loop_device_unrelinquish(d); /* Let's try to destroy the loopback device */
+
+ created_dir = TAKE_PTR(mounted_dir);
+
+ if (rmdir(created_dir) < 0)
+ log_warning_errno(r, "Failed to remove directory '%s', ignoring: %m", created_dir);
+
+ temp = TAKE_PTR(created_dir);
+
+ return rcode;
+}
+
+static int action_discover(void) {
+ _cleanup_hashmap_free_ Hashmap *images = NULL;
+ _cleanup_(table_unrefp) Table *t = NULL;
+ Image *img;
+ int r;
+
+ images = hashmap_new(&image_hash_ops);
+ if (!images)
+ return log_oom();
+
+ for (ImageClass cl = 0; cl < _IMAGE_CLASS_MAX; cl++) {
+ r = image_discover(cl, NULL, images);
+ if (r < 0)
+ return log_error_errno(r, "Failed to discover images: %m");
+ }
+
+ if ((arg_json_format_flags & JSON_FORMAT_OFF) && hashmap_isempty(images)) {
+ log_info("No images found.");
+ return 0;
+ }
+
+ t = table_new("name", "type", "class", "ro", "path", "time", "usage");
+ if (!t)
+ return log_oom();
+
+ table_set_align_percent(t, table_get_cell(t, 0, 6), 100);
+ table_set_ersatz_string(t, TABLE_ERSATZ_DASH);
+
+ HASHMAP_FOREACH(img, images) {
+
+ if (!IN_SET(img->type, IMAGE_RAW, IMAGE_BLOCK))
+ continue;
+
+ r = table_add_many(
+ t,
+ TABLE_STRING, img->name,
+ TABLE_STRING, image_type_to_string(img->type),
+ TABLE_STRING, image_class_to_string(img->class),
+ TABLE_BOOLEAN, img->read_only,
+ TABLE_PATH, img->path,
+ TABLE_TIMESTAMP, img->mtime != 0 ? img->mtime : img->crtime,
+ TABLE_SIZE, img->usage);
+ if (r < 0)
+ return table_log_add_error(r);
+ }
+
+ (void) table_set_sort(t, (size_t) 0);
+
+ return table_print_with_pager(t, arg_json_format_flags, arg_pager_flags, arg_legend);
+}
+
+static int action_attach(DissectedImage *m, LoopDevice *d) {
+ int r;
+
+ assert(m);
+ assert(d);
+
+ r = loop_device_set_autoclear(d, false);
+ if (r < 0)
+ return log_error_errno(r, "Failed to disable auto-clear logic on loopback device: %m");
+
+ r = dissected_image_relinquish(m);
+ if (r < 0)
+ return log_error_errno(r, "Failed to relinquish DM and loopback block devices: %m");
+
+ puts(d->node);
+ return 0;
+}
+
+static int action_detach(const char *path) {
+ _cleanup_(loop_device_unrefp) LoopDevice *loop = NULL;
+ _cleanup_close_ int fd = -EBADF;
+ struct stat st;
+ int r;
+
+ fd = open(path, O_PATH|O_CLOEXEC);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to open '%s': %m", path);
+
+ if (fstat(fd, &st) < 0)
+ return log_error_errno(errno, "Failed to stat '%s': %m", path);
+
+ if (S_ISBLK(st.st_mode)) {
+ r = loop_device_open_from_fd(fd, O_RDONLY, LOCK_EX, &loop);
+ if (r < 0)
+ return log_error_errno(r, "Failed to open '%s' as loopback block device: %m", path);
+
+ } else if (S_ISREG(st.st_mode)) {
+ _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
+
+ /* If a regular file is specified, search for a loopback block device that is backed by it */
+
+ r = sd_device_enumerator_new(&e);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate enumerator: %m");
+
+ r = sd_device_enumerator_add_match_subsystem(e, "block", true);
+ if (r < 0)
+ return log_error_errno(r, "Failed to match block devices: %m");
+
+ r = sd_device_enumerator_add_match_sysname(e, "loop*");
+ if (r < 0)
+ return log_error_errno(r, "Failed to match loopback block devices: %m");
+
+ (void) sd_device_enumerator_allow_uninitialized(e);
+
+ FOREACH_DEVICE(e, d) {
+ _cleanup_(loop_device_unrefp) LoopDevice *entry_loop = NULL;
+ const char *name, *devtype;
+
+ r = sd_device_get_sysname(d, &name);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to get enumerated device's sysname, skipping: %m");
+ continue;
+ }
+
+ r = sd_device_get_devtype(d, &devtype);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to get devtype of '%s', skipping: %m", name);
+ continue;
+ }
+
+ if (!streq(devtype, "disk")) /* Filter out partition block devices */
+ continue;
+
+ r = loop_device_open(d, O_RDONLY, LOCK_SH, &entry_loop);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to open loopback block device '%s', skipping: %m", name);
+ continue;
+ }
+
+ if (entry_loop->backing_devno == st.st_dev && entry_loop->backing_inode == st.st_ino) {
+ /* Found it! The kernel allows attaching a single file to multiple loopback
+ * devices. Let's destruct them in reverse order, i.e. find the last matching
+ * loopback device here, rather than the first. */
+
+ loop_device_unref(loop);
+ loop = TAKE_PTR(entry_loop);
+ }
+ }
+
+ if (!loop)
+ return log_error_errno(SYNTHETIC_ERRNO(ENXIO), "No loopback block device backed by '%s' found.", path);
+
+ r = loop_device_flock(loop, LOCK_EX);
+ if (r < 0)
+ return log_error_errno(r, "Failed to upgrade device lock: %m");
+ }
+
+ r = loop_device_set_autoclear(loop, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to enable autoclear logic on '%s', ignoring: %m", loop->node);
+
+ loop_device_unrelinquish(loop);
+ return 0;
+}
+
+static int action_validate(void) {
+ int r;
+
+ r = dissect_image_file_and_warn(
+ arg_image,
+ &arg_verity_settings,
+ NULL,
+ arg_image_policy,
+ arg_flags,
+ NULL);
+ if (r < 0)
+ return r;
+
+ if (isatty(STDOUT_FILENO) && emoji_enabled())
+ printf("%s ", special_glyph(SPECIAL_GLYPH_SPARKLES));
+
+ printf("%sOK%s", ansi_highlight_green(), ansi_normal());
+
+ if (isatty(STDOUT_FILENO) && emoji_enabled())
+ printf(" %s", special_glyph(SPECIAL_GLYPH_SPARKLES));
+
+ putc('\n', stdout);
+ return 0;
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL;
+ _cleanup_(loop_device_unrefp) LoopDevice *d = NULL;
+ uint32_t loop_flags;
+ int open_flags, r;
+
+ log_setup();
+
+ if (invoked_as(argv, "mount.ddi"))
+ r = parse_argv_as_mount_helper(argc, argv);
+ else
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r;
+
+ switch (arg_action) {
+ case ACTION_UMOUNT:
+ return action_umount(arg_path);
+
+ case ACTION_DETACH:
+ return action_detach(arg_image);
+
+ case ACTION_DISCOVER:
+ return action_discover();
+
+ default:
+ /* All other actions need the image dissected */
+ break;
+ }
+
+ if (arg_image) {
+ r = verity_settings_load(
+ &arg_verity_settings,
+ arg_image, NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read verity artifacts for %s: %m", arg_image);
+
+ if (arg_verity_settings.data_path)
+ arg_flags |= DISSECT_IMAGE_NO_PARTITION_TABLE; /* We only support Verity per file system,
+ * hence if there's external Verity data
+ * available we turn off partition table
+ * support */
+
+ if (arg_action == ACTION_VALIDATE)
+ return action_validate();
+
+ open_flags = FLAGS_SET(arg_flags, DISSECT_IMAGE_DEVICE_READ_ONLY) ? O_RDONLY : O_RDWR;
+ loop_flags = FLAGS_SET(arg_flags, DISSECT_IMAGE_NO_PARTITION_TABLE) ? 0 : LO_FLAGS_PARTSCAN;
+ if (arg_in_memory)
+ r = loop_device_make_by_path_memory(arg_image, open_flags, /* sector_size= */ UINT32_MAX, loop_flags, LOCK_SH, &d);
+ else
+ r = loop_device_make_by_path(arg_image, open_flags, /* sector_size= */ UINT32_MAX, loop_flags, LOCK_SH, &d);
+ if (r < 0)
+ return log_error_errno(r, "Failed to set up loopback device for %s: %m", arg_image);
+
+ if (arg_loop_ref) {
+ r = loop_device_set_filename(d, arg_loop_ref);
+ if (r < 0)
+ log_warning_errno(r, "Failed to set loop reference string to '%s', ignoring: %m", arg_loop_ref);
+ }
+
+ r = dissect_loop_device_and_warn(
+ d,
+ &arg_verity_settings,
+ /* mount_options= */ NULL,
+ arg_image_policy,
+ arg_flags,
+ &m);
+ if (r < 0)
+ return r;
+
+ if (arg_action == ACTION_ATTACH)
+ return action_attach(m, d);
+
+ r = dissected_image_load_verity_sig_partition(
+ m,
+ d->fd,
+ &arg_verity_settings);
+ if (r < 0)
+ return log_error_errno(r, "Failed to load verity signature partition: %m");
+
+ if (arg_action != ACTION_DISSECT) {
+ r = dissected_image_decrypt_interactively(
+ m, NULL,
+ &arg_verity_settings,
+ arg_flags);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ switch (arg_action) {
+
+ case ACTION_DISSECT:
+ return action_dissect(m, d);
+
+ case ACTION_MOUNT:
+ return action_mount(m, d);
+
+ case ACTION_LIST:
+ case ACTION_MTREE:
+ case ACTION_COPY_FROM:
+ case ACTION_COPY_TO:
+ return action_list_or_mtree_or_copy(m, d);
+
+ case ACTION_WITH:
+ return action_with(m, d);
+
+ default:
+ assert_not_reached();
+ }
+}
+
+DEFINE_MAIN_FUNCTION(run);
diff --git a/src/dissect/meson.build b/src/dissect/meson.build
new file mode 100644
index 0000000..e422dbd
--- /dev/null
+++ b/src/dissect/meson.build
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+executables += [
+ executable_template + {
+ 'name' : 'systemd-dissect',
+ 'public' : true,
+ 'conditions' : ['HAVE_BLKID'],
+ 'sources' : files('dissect.c'),
+ },
+]
+
+if conf.get('HAVE_BLKID') == 1
+ install_emptydir(sbindir)
+ meson.add_install_script(sh, '-c',
+ ln_s.format(bindir / 'systemd-dissect',
+ sbindir / 'mount.ddi'))
+endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-24 07:43:07 +0000