| /* 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-symlinks.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 "user-util.h" |
| |
| static enum { |
| ACTION_DISSECT, |
| ACTION_MOUNT, |
| ACTION_UMOUNT, |
| ACTION_LIST, |
| ACTION_MTREE, |
| ACTION_WITH, |
| ACTION_COPY_FROM, |
| ACTION_COPY_TO, |
| ACTION_DISCOVER, |
| } arg_action = ACTION_DISSECT; |
| static const char *arg_image = NULL; |
| static const 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_DESTRUCTOR_REGISTER(arg_verity_settings, verity_settings_done); |
| STATIC_DESTRUCTOR_REGISTER(arg_argv, strv_freep); |
| |
| static int help(void) { |
| _cleanup_free_ char *link = NULL; |
| int r; |
| |
| 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...] --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\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" |
| " --json=pretty|short|off\n" |
| " Generate JSON 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" |
| " -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" |
| "\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_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, |
| }; |
| |
| 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' }, |
| { "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 }, |
| {} |
| }; |
| |
| _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 '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 128bit 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 '?': |
| 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."); |
| |
| arg_image = argv[optind]; |
| arg_flags |= DISSECT_IMAGE_READ_ONLY; |
| 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."); |
| |
| arg_image = argv[optind]; |
| arg_path = argv[optind + 1]; |
| 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."); |
| |
| arg_path = argv[optind]; |
| break; |
| |
| case ACTION_LIST: |
| case ACTION_MTREE: |
| if (optind + 1 != argc) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "Expected an image file path as only argument."); |
| |
| arg_image = argv[optind]; |
| 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 path, a source path and an optional destination path as only arguments."); |
| |
| arg_image = argv[optind]; |
| 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 path, an optional source path and a destination path as only arguments."); |
| |
| arg_image = argv[optind]; |
| |
| 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."); |
| |
| arg_image = argv[optind]; |
| 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; |
| |
| default: |
| assert_not_reached(); |
| } |
| |
| return 1; |
| } |
| |
| static int strv_pair_to_json(char **l, JsonVariant **ret) { |
| _cleanup_strv_free_ char **jl = NULL; |
| |
| STRV_FOREACH_PAIR(a, b, l) { |
| char *j; |
| |
| j = strjoin(*a, "=", *b); |
| if (!j) |
| return log_oom(); |
| |
| if (strv_consume(&jl, j) < 0) |
| return log_oom(); |
| } |
| |
| return json_variant_new_array_strv(ret, jl); |
| } |
| |
| 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_sysext_scopes(DissectedImage *m, char ***ret_scopes) { |
| _cleanup_strv_free_ char **l = NULL; |
| const char *e; |
| |
| assert(m); |
| assert(ret_scopes); |
| |
| /* If there's no extension-release file its not a system extension. Otherwise the SYSEXT_SCOPE field |
| * indicates which scope it is for — and it defaults to "system" + "portable" if unset. */ |
| |
| if (!m->extension_release) { |
| *ret_scopes = NULL; |
| return 0; |
| } |
| |
| e = strv_env_pairs_get(m->extension_release, "SYSEXT_SCOPE"); |
| 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)); |
| |
| printf(" Sec. Size: %" PRIu32 "\n", m->sector_size); |
| |
| if (arg_json_format_flags & JSON_FORMAT_OFF) |
| 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) { |
| _cleanup_strv_free_ char **sysext_scopes = NULL; |
| |
| 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->extension_release, |
| " Ext. Rel.:"); |
| |
| 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->extension_release)) |
| putc('\n', stdout); |
| |
| printf(" Use As: %s bootable system for UEFI\n", COLOR_MARK_BOOL(m->partitions[PARTITION_ESP].found)); |
| |
| if (m->has_init_system >= 0) |
| printf(" %s bootable system for container\n", COLOR_MARK_BOOL(m->has_init_system)); |
| |
| printf(" %s portable service\n", |
| COLOR_MARK_BOOL(strv_env_pairs_get(m->os_release, "PORTABLE_PREFIXES"))); |
| printf(" %s initrd\n", |
| COLOR_MARK_BOOL(!strv_isempty(m->initrd_release))); |
| |
| r = get_sysext_scopes(m, &sysext_scopes); |
| if (r < 0) |
| return log_error_errno(r, "Failed to parse SYSEXT_SCOPE: %m"); |
| |
| printf(" %s extension for system\n", |
| COLOR_MARK_BOOL(strv_contains(sysext_scopes, "system"))); |
| printf(" %s extension for initrd\n", |
| COLOR_MARK_BOOL(strv_contains(sysext_scopes, "initrd"))); |
| printf(" %s extension for portable service\n", |
| COLOR_MARK_BOOL(strv_contains(sysext_scopes, "portable"))); |
| |
| putc('\n', stdout); |
| } else { |
| _cleanup_(json_variant_unrefp) JsonVariant *mi = NULL, *osr = NULL, *irdr = NULL, *exr = NULL; |
| _cleanup_strv_free_ char **sysext_scopes = NULL; |
| |
| if (!strv_isempty(m->machine_info)) { |
| r = strv_pair_to_json(m->machine_info, &mi); |
| if (r < 0) |
| return log_oom(); |
| } |
| |
| if (!strv_isempty(m->os_release)) { |
| r = strv_pair_to_json(m->os_release, &osr); |
| if (r < 0) |
| return log_oom(); |
| } |
| |
| if (!strv_isempty(m->initrd_release)) { |
| r = strv_pair_to_json(m->initrd_release, &irdr); |
| if (r < 0) |
| return log_oom(); |
| } |
| |
| if (!strv_isempty(m->extension_release)) { |
| r = strv_pair_to_json(m->extension_release, &exr); |
| if (r < 0) |
| return log_oom(); |
| } |
| |
| r = get_sysext_scopes(m, &sysext_scopes); |
| if (r < 0) |
| return log_error_errno(r, "Failed to parse SYSEXT_SCOPE: %m"); |
| |
| r = json_build(&v, JSON_BUILD_OBJECT( |
| JSON_BUILD_PAIR("name", JSON_BUILD_STRING(bn)), |
| JSON_BUILD_PAIR_CONDITION(!sd_id128_is_null(m->image_uuid), "imageUuid", JSON_BUILD_UUID(m->image_uuid)), |
| JSON_BUILD_PAIR("size", JSON_BUILD_INTEGER(size)), |
| JSON_BUILD_PAIR("sectorSize", JSON_BUILD_INTEGER(m->sector_size)), |
| 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(mi, "machineInfo", JSON_BUILD_VARIANT(mi)), |
| JSON_BUILD_PAIR_CONDITION(osr, "osRelease", JSON_BUILD_VARIANT(osr)), |
| JSON_BUILD_PAIR_CONDITION(osr, "initrdRelease", JSON_BUILD_VARIANT(irdr)), |
| JSON_BUILD_PAIR_CONDITION(exr, "extensionRelease", JSON_BUILD_VARIANT(exr)), |
| JSON_BUILD_PAIR("useBootableUefi", JSON_BUILD_BOOLEAN(m->partitions[PARTITION_ESP].found)), |
| JSON_BUILD_PAIR_CONDITION(m->has_init_system >= 0, "useBootableContainer", JSON_BUILD_BOOLEAN(m->has_init_system)), |
| JSON_BUILD_PAIR("useInitrd", JSON_BUILD_BOOLEAN(!strv_isempty(m->initrd_release))), |
| JSON_BUILD_PAIR("usePortableService", JSON_BUILD_BOOLEAN(strv_env_pairs_get(m->os_release, "PORTABLE_MATCHES"))), |
| JSON_BUILD_PAIR("useSystemExtension", JSON_BUILD_BOOLEAN(strv_contains(sysext_scopes, "system"))), |
| JSON_BUILD_PAIR("useInitRDExtension", JSON_BUILD_BOOLEAN(strv_contains(sysext_scopes, "initrd"))), |
| JSON_BUILD_PAIR("usePortableExtension", JSON_BUILD_BOOLEAN(strv_contains(sysext_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, 7), 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_STRING, 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); |
| |
| r = dissected_image_decrypt_interactively( |
| m, NULL, |
| &arg_verity_settings, |
| arg_flags); |
| if (r < 0) |
| return r; |
| |
| r = dissected_image_mount_and_warn(m, arg_path, UID_INVALID, UID_INVALID, 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 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, |
| ansi_grey(), |
| ansi_normal(), |
| sx->stx_uid); |
| |
| if (FLAGS_SET(sx->stx_mask, STATX_GID)) |
| printf(" %sgid=%s" GID_FMT, |
| ansi_grey(), |
| ansi_normal(), |
| sx->stx_gid); |
| |
| 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 (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; |
| int r; |
| |
| assert(m); |
| assert(d); |
| |
| r = dissected_image_decrypt_interactively( |
| m, NULL, |
| &arg_verity_settings, |
| arg_flags); |
| if (r < 0) |
| return r; |
| |
| 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_INVALID, UID_INVALID, 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"); |
| |
| if (arg_action == ACTION_COPY_FROM) { |
| _cleanup_close_ int source_fd = -EBADF, target_fd = -EBADF; |
| |
| source_fd = chase_symlinks_and_open(arg_source, mounted_dir, 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_fd(source_fd, 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, target_fd, 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! */ |
| |
| } else if (arg_action == 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_symlinks(dn, mounted_dir, 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); |
| } else |
| r = copy_tree_at(source_fd, ".", target_fd, ".", UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_REPLACE|COPY_SIGINT|COPY_HARDLINKS, 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, target_fd, 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! */ |
| |
| } else { |
| _cleanup_close_ int dfd = -EBADF; |
| |
| dfd = open(mounted_dir, 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; |
| } |
| |
| 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_symlinks_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; |
| |
| r = dissected_image_decrypt_interactively( |
| m, NULL, |
| &arg_verity_settings, |
| arg_flags); |
| if (r < 0) |
| return r; |
| |
| 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_INVALID, UID_INVALID, 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 (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_freep) 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(); |
| |
| 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 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(); |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| return r; |
| |
| if (arg_action == ACTION_UMOUNT) |
| return action_umount(arg_path); |
| if (arg_action == ACTION_DISCOVER) |
| return action_discover(); |
| |
| 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 */ |
| |
| 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); |
| |
| r = dissect_loop_device_and_warn( |
| d, |
| &arg_verity_settings, |
| NULL, |
| arg_flags, |
| &m); |
| if (r < 0) |
| return r; |
| |
| 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"); |
| |
| switch (arg_action) { |
| |
| case ACTION_DISSECT: |
| r = action_dissect(m, d); |
| break; |
| |
| case ACTION_MOUNT: |
| r = action_mount(m, d); |
| break; |
| |
| case ACTION_LIST: |
| case ACTION_MTREE: |
| case ACTION_COPY_FROM: |
| case ACTION_COPY_TO: |
| r = action_list_or_mtree_or_copy(m, d); |
| break; |
| |
| case ACTION_WITH: |
| r = action_with(m, d); |
| break; |
| |
| default: |
| assert_not_reached(); |
| } |
| |
| return r; |
| } |
| |
| DEFINE_MAIN_FUNCTION(run); |
