src/portable/portable.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <linux/loop.h>
   4
   5 #include "bus-common-errors.h"
   6 #include "bus-error.h"
   7 #include "chase-symlinks.h"
   8 #include "conf-files.h"
   9 #include "copy.h"
  10 #include "data-fd-util.h"
  11 #include "constants.h"
  12 #include "dirent-util.h"
  13 #include "discover-image.h"
  14 #include "dissect-image.h"
  15 #include "env-file.h"
  16 #include "env-util.h"
  17 #include "errno-list.h"
  18 #include "escape.h"
  19 #include "extension-release.h"
  20 #include "fd-util.h"
  21 #include "fileio.h"
  22 #include "fs-util.h"
  23 #include "install.h"
  24 #include "io-util.h"
  25 #include "locale-util.h"
  26 #include "loop-util.h"
  27 #include "mkdir.h"
  28 #include "nulstr-util.h"
  29 #include "os-util.h"
  30 #include "path-lookup.h"
  31 #include "portable.h"
  32 #include "process-util.h"
  33 #include "selinux-util.h"
  34 #include "set.h"
  35 #include "signal-util.h"
  36 #include "socket-util.h"
  37 #include "sort-util.h"
  38 #include "string-table.h"
  39 #include "strv.h"
  40 #include "tmpfile-util.h"
  41 #include "user-util.h"
  42
  43 /* Markers used in the first line of our 20-portable.conf unit file drop-in to determine, that a) the unit file was
  44  * dropped there by the portable service logic and b) for which image it was dropped there. */
  45 #define PORTABLE_DROPIN_MARKER_BEGIN "# Drop-in created for image '"
  46 #define PORTABLE_DROPIN_MARKER_END "', do not edit."
  47
  48 static bool prefix_match(const char *unit, const char *prefix) {
  49         const char *p;
  50
  51         p = startswith(unit, prefix);
  52         if (!p)
  53                 return false;
  54
  55         /* Only respect prefixes followed by dash or dot or when there's a complete match */
  56         return IN_SET(*p, '-', '.', '@', 0);
  57 }
  58
  59 static bool unit_match(const char *unit, char **matches) {
  60         const char *dot;
  61
  62         dot = strrchr(unit, '.');
  63         if (!dot)
  64                 return false;
  65
  66         if (!STR_IN_SET(dot, ".service", ".socket", ".target", ".timer", ".path"))
  67                 return false;
  68
  69         /* Empty match expression means: everything */
  70         if (strv_isempty(matches))
  71                 return true;
  72
  73         /* Otherwise, at least one needs to match */
  74         STRV_FOREACH(i, matches)
  75                 if (prefix_match(unit, *i))
  76                         return true;
  77
  78         return false;
  79 }
  80
  81 static PortableMetadata *portable_metadata_new(const char *name, const char *path, const char *selinux_label, int fd) {
  82         PortableMetadata *m;
  83
  84         m = malloc0(offsetof(PortableMetadata, name) + strlen(name) + 1);
  85         if (!m)
  86                 return NULL;
  87
  88         /* In case of a layered attach, we want to remember which image the unit came from */
  89         if (path) {
  90                 m->image_path = strdup(path);
  91                 if (!m->image_path)
  92                         return mfree(m);
  93         }
  94
  95         /* The metadata file might have SELinux labels, we need to carry them and reapply them */
  96         if (!isempty(selinux_label)) {
  97                 m->selinux_label = strdup(selinux_label);
  98                 if (!m->selinux_label) {
  99                         free(m->image_path);
 100                         return mfree(m);
 101                 }
 102         }
 103
 104         strcpy(m->name, name);
 105         m->fd = fd;
 106
 107         return TAKE_PTR(m);
 108 }
 109
 110 PortableMetadata *portable_metadata_unref(PortableMetadata *i) {
 111         if (!i)
 112                 return NULL;
 113
 114         safe_close(i->fd);
 115         free(i->source);
 116         free(i->image_path);
 117         free(i->selinux_label);
 118
 119         return mfree(i);
 120 }
 121
 122 static int compare_metadata(PortableMetadata *const *x, PortableMetadata *const *y) {
 123         return strcmp((*x)->name, (*y)->name);
 124 }
 125
 126 int portable_metadata_hashmap_to_sorted_array(Hashmap *unit_files, PortableMetadata ***ret) {
 127
 128         _cleanup_free_ PortableMetadata **sorted = NULL;
 129         PortableMetadata *item;
 130         size_t k = 0;
 131
 132         sorted = new(PortableMetadata*, hashmap_size(unit_files));
 133         if (!sorted)
 134                 return -ENOMEM;
 135
 136         HASHMAP_FOREACH(item, unit_files)
 137                 sorted[k++] = item;
 138
 139         assert(k == hashmap_size(unit_files));
 140
 141         typesafe_qsort(sorted, k, compare_metadata);
 142
 143         *ret = TAKE_PTR(sorted);
 144         return 0;
 145 }
 146
 147 static int send_one_fd_iov_with_data_fd(
 148                 int socket_fd,
 149                 const struct iovec *iov,
 150                 size_t iovlen,
 151                 int fd) {
 152
 153         _cleanup_close_ int data_fd = -EBADF;
 154
 155         assert(iov || iovlen == 0);
 156         assert(socket_fd >= 0);
 157         assert(fd >= 0);
 158
 159         data_fd = copy_data_fd(fd);
 160         if (data_fd < 0)
 161                 return data_fd;
 162
 163         return send_one_fd_iov(socket_fd, data_fd, iov, iovlen, 0);
 164 }
 165
 166 DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(portable_metadata_hash_ops, char, string_hash_func, string_compare_func,
 167                                               PortableMetadata, portable_metadata_unref);
 168
 169 static int extract_now(
 170                 const char *where,
 171                 char **matches,
 172                 const char *image_name,
 173                 bool path_is_extension,
 174                 bool relax_extension_release_check,
 175                 int socket_fd,
 176                 PortableMetadata **ret_os_release,
 177                 Hashmap **ret_unit_files) {
 178
 179         _cleanup_hashmap_free_ Hashmap *unit_files = NULL;
 180         _cleanup_(portable_metadata_unrefp) PortableMetadata *os_release = NULL;
 181         _cleanup_(lookup_paths_free) LookupPaths paths = {};
 182         _cleanup_close_ int os_release_fd = -EBADF;
 183         _cleanup_free_ char *os_release_path = NULL;
 184         const char *os_release_id;
 185         int r;
 186
 187         /* Extracts the metadata from a directory tree 'where'. Extracts two kinds of information: the /etc/os-release
 188          * data, and all unit files matching the specified expression. Note that this function is called in two very
 189          * different but also similar contexts. When the tool gets invoked on a directory tree, we'll process it
 190          * directly, and in-process, and thus can return the requested data directly, via 'ret_os_release' and
 191          * 'ret_unit_files'. However, if the tool is invoked on a raw disk image — which needs to be mounted first — we
 192          * are invoked in a child process with private mounts and then need to send the collected data to our
 193          * parent. To handle both cases in one call this function also gets a 'socket_fd' parameter, which when >= 0 is
 194          * used to send the data to the parent. */
 195
 196         assert(where);
 197
 198         /* First, find os-release/extension-release and send it upstream (or just save it). */
 199         if (path_is_extension) {
 200                 os_release_id = strjoina("/usr/lib/extension-release.d/extension-release.", image_name);
 201                 r = open_extension_release(where, image_name, relax_extension_release_check, &os_release_path, &os_release_fd);
 202         } else {
 203                 os_release_id = "/etc/os-release";
 204                 r = open_os_release(where, &os_release_path, &os_release_fd);
 205         }
 206         if (r < 0)
 207                 log_debug_errno(r,
 208                                 "Couldn't acquire %s file, ignoring: %m",
 209                                 path_is_extension ? "extension-release " : "os-release");
 210         else {
 211                 if (socket_fd >= 0) {
 212                         struct iovec iov[] = {
 213                                 IOVEC_MAKE_STRING(os_release_id),
 214                                 IOVEC_MAKE((char *)"\0", sizeof(char)),
 215                         };
 216
 217                         r = send_one_fd_iov_with_data_fd(socket_fd, iov, ELEMENTSOF(iov), os_release_fd);
 218                         if (r < 0)
 219                                 return log_debug_errno(r, "Failed to send os-release file: %m");
 220                 }
 221
 222                 if (ret_os_release) {
 223                         os_release = portable_metadata_new(os_release_id, NULL, NULL, os_release_fd);
 224                         if (!os_release)
 225                                 return -ENOMEM;
 226
 227                         os_release_fd = -EBADF;
 228                         os_release->source = TAKE_PTR(os_release_path);
 229                 }
 230         }
 231
 232         /* Then, send unit file data to the parent (or/and add it to the hashmap). For that we use our usual unit
 233          * discovery logic. Note that we force looking inside of /lib/systemd/system/ for units too, as we mightbe
 234          * compiled for a split-usr system but the image might be a legacy-usr one. */
 235         r = lookup_paths_init(&paths, RUNTIME_SCOPE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, where);
 236         if (r < 0)
 237                 return log_debug_errno(r, "Failed to acquire lookup paths: %m");
 238
 239         unit_files = hashmap_new(&portable_metadata_hash_ops);
 240         if (!unit_files)
 241                 return -ENOMEM;
 242
 243         STRV_FOREACH(i, paths.search_path) {
 244                 _cleanup_free_ char *resolved = NULL;
 245                 _cleanup_closedir_ DIR *d = NULL;
 246
 247                 r = chase_symlinks_and_opendir(*i, where, 0, &resolved, &d);
 248                 if (r < 0) {
 249                         log_debug_errno(r, "Failed to open unit path '%s', ignoring: %m", *i);
 250                         continue;
 251                 }
 252
 253                 FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to read directory: %m")) {
 254                         _cleanup_(portable_metadata_unrefp) PortableMetadata *m = NULL;
 255                         _cleanup_(mac_selinux_freep) char *con = NULL;
 256                         _cleanup_close_ int fd = -EBADF;
 257
 258                         if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY))
 259                                 continue;
 260
 261                         if (!unit_match(de->d_name, matches))
 262                                 continue;
 263
 264                         /* Filter out duplicates */
 265                         if (hashmap_get(unit_files, de->d_name))
 266                                 continue;
 267
 268                         if (!IN_SET(de->d_type, DT_LNK, DT_REG))
 269                                 continue;
 270
 271                         fd = openat(dirfd(d), de->d_name, O_CLOEXEC|O_RDONLY);
 272                         if (fd < 0) {
 273                                 log_debug_errno(errno, "Failed to open unit file '%s', ignoring: %m", de->d_name);
 274                                 continue;
 275                         }
 276
 277 #if HAVE_SELINUX
 278                         /* The units will be copied on the host's filesystem, so if they had a SELinux label
 279                          * we have to preserve it. Copy it out so that it can be applied later. */
 280
 281                         r = fgetfilecon_raw(fd, &con);
 282                         if (r < 0 && !ERRNO_IS_XATTR_ABSENT(errno))
 283                                 log_debug_errno(errno, "Failed to get SELinux file context from '%s', ignoring: %m", de->d_name);
 284 #endif
 285
 286                         if (socket_fd >= 0) {
 287                                 struct iovec iov[] = {
 288                                         IOVEC_MAKE_STRING(de->d_name),
 289                                         IOVEC_MAKE((char *)"\0", sizeof(char)),
 290                                         IOVEC_MAKE_STRING(strempty(con)),
 291                                 };
 292
 293                                 r = send_one_fd_iov_with_data_fd(socket_fd, iov, ELEMENTSOF(iov), fd);
 294                                 if (r < 0)
 295                                         return log_debug_errno(r, "Failed to send unit metadata to parent: %m");
 296                         }
 297
 298                         m = portable_metadata_new(de->d_name, where, con, fd);
 299                         if (!m)
 300                                 return -ENOMEM;
 301                         fd = -EBADF;
 302
 303                         m->source = path_join(resolved, de->d_name);
 304                         if (!m->source)
 305                                 return -ENOMEM;
 306
 307                         r = hashmap_put(unit_files, m->name, m);
 308                         if (r < 0)
 309                                 return log_debug_errno(r, "Failed to add unit to hashmap: %m");
 310                         m = NULL;
 311                 }
 312         }
 313
 314         if (ret_os_release)
 315                 *ret_os_release = TAKE_PTR(os_release);
 316         if (ret_unit_files)
 317                 *ret_unit_files = TAKE_PTR(unit_files);
 318
 319         return 0;
 320 }
 321
 322 static int portable_extract_by_path(
 323                 const char *path,
 324                 bool path_is_extension,
 325                 bool relax_extension_release_check,
 326                 char **matches,
 327                 PortableMetadata **ret_os_release,
 328                 Hashmap **ret_unit_files,
 329                 sd_bus_error *error) {
 330
 331         _cleanup_hashmap_free_ Hashmap *unit_files = NULL;
 332         _cleanup_(portable_metadata_unrefp) PortableMetadata* os_release = NULL;
 333         _cleanup_(loop_device_unrefp) LoopDevice *d = NULL;
 334         int r;
 335
 336         assert(path);
 337
 338         r = loop_device_make_by_path(path, O_RDONLY, /* sector_size= */ UINT32_MAX, LO_FLAGS_PARTSCAN, LOCK_SH, &d);
 339         if (r == -EISDIR) {
 340                 _cleanup_free_ char *image_name = NULL;
 341
 342                 /* We can't turn this into a loop-back block device, and this returns EISDIR? Then this is a directory
 343                  * tree and not a raw device. It's easy then. */
 344
 345                 r = path_extract_filename(path, &image_name);
 346                 if (r < 0)
 347                         return log_error_errno(r, "Failed to extract image name from path '%s': %m", path);
 348
 349                 r = extract_now(path, matches, image_name, path_is_extension, /* relax_extension_release_check= */ false, -1, &os_release, &unit_files);
 350                 if (r < 0)
 351                         return r;
 352
 353         } else if (r < 0)
 354                 return log_debug_errno(r, "Failed to set up loopback device for %s: %m", path);
 355         else {
 356                 _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL;
 357                 _cleanup_(rmdir_and_freep) char *tmpdir = NULL;
 358                 _cleanup_(close_pairp) int seq[2] = PIPE_EBADF;
 359                 _cleanup_(sigkill_waitp) pid_t child = 0;
 360
 361                 /* We now have a loopback block device, let's fork off a child in its own mount namespace, mount it
 362                  * there, and extract the metadata we need. The metadata is sent from the child back to us. */
 363
 364                 BLOCK_SIGNALS(SIGCHLD);
 365
 366                 r = mkdtemp_malloc("/tmp/inspect-XXXXXX", &tmpdir);
 367                 if (r < 0)
 368                         return log_debug_errno(r, "Failed to create temporary directory: %m");
 369
 370                 r = dissect_loop_device(
 371                                 d,
 372                                 NULL, NULL,
 373                                 DISSECT_IMAGE_READ_ONLY |
 374                                 DISSECT_IMAGE_GENERIC_ROOT |
 375                                 DISSECT_IMAGE_REQUIRE_ROOT |
 376                                 DISSECT_IMAGE_DISCARD_ON_LOOP |
 377                                 DISSECT_IMAGE_RELAX_VAR_CHECK |
 378                                 DISSECT_IMAGE_USR_NO_ROOT |
 379                                 DISSECT_IMAGE_ADD_PARTITION_DEVICES |
 380                                 DISSECT_IMAGE_PIN_PARTITION_DEVICES,
 381                                 &m);
 382                 if (r == -ENOPKG)
 383                         sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Couldn't identify a suitable partition table or file system in '%s'.", path);
 384                 else if (r == -EADDRNOTAVAIL)
 385                         sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "No root partition for specified root hash found in '%s'.", path);
 386                 else if (r == -ENOTUNIQ)
 387                         sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Multiple suitable root partitions found in image '%s'.", path);
 388                 else if (r == -ENXIO)
 389                         sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "No suitable root partition found in image '%s'.", path);
 390                 else if (r == -EPROTONOSUPPORT)
 391                         sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Device '%s' is loopback block device with partition scanning turned off, please turn it on.", path);
 392                 if (r < 0)
 393                         return r;
 394
 395                 if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, seq) < 0)
 396                         return log_debug_errno(errno, "Failed to allocated SOCK_SEQPACKET socket: %m");
 397
 398                 r = safe_fork("(sd-dissect)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE|FORK_LOG, &child);
 399                 if (r < 0)
 400                         return r;
 401                 if (r == 0) {
 402                         DissectImageFlags flags = DISSECT_IMAGE_READ_ONLY;
 403
 404                         seq[0] = safe_close(seq[0]);
 405
 406                         if (path_is_extension)
 407                                 flags |= DISSECT_IMAGE_VALIDATE_OS_EXT | (relax_extension_release_check ? DISSECT_IMAGE_RELAX_SYSEXT_CHECK : 0);
 408                         else
 409                                 flags |= DISSECT_IMAGE_VALIDATE_OS;
 410
 411                         r = dissected_image_mount(m, tmpdir, UID_INVALID, UID_INVALID, flags);
 412                         if (r < 0) {
 413                                 log_debug_errno(r, "Failed to mount dissected image: %m");
 414                                 goto child_finish;
 415                         }
 416
 417                         r = extract_now(tmpdir, matches, m->image_name, path_is_extension, relax_extension_release_check, seq[1], NULL, NULL);
 418
 419                 child_finish:
 420                         _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
 421                 }
 422
 423                 seq[1] = safe_close(seq[1]);
 424
 425                 unit_files = hashmap_new(&portable_metadata_hash_ops);
 426                 if (!unit_files)
 427                         return -ENOMEM;
 428
 429                 for (;;) {
 430                         _cleanup_(portable_metadata_unrefp) PortableMetadata *add = NULL;
 431                         _cleanup_close_ int fd = -EBADF;
 432                         /* We use NAME_MAX space for the SELinux label here. The kernel currently enforces no limit, but
 433                          * according to suggestions from the SELinux people this will change and it will probably be
 434                          * identical to NAME_MAX. For now we use that, but this should be updated one day when the final
 435                          * limit is known. */
 436                         char iov_buffer[PATH_MAX + NAME_MAX + 2];
 437                         struct iovec iov = IOVEC_MAKE(iov_buffer, sizeof(iov_buffer));
 438
 439                         ssize_t n = receive_one_fd_iov(seq[0], &iov, 1, 0, &fd);
 440                         if (n == -EIO)
 441                                 break;
 442                         if (n < 0)
 443                                 return log_debug_errno(n, "Failed to receive item: %m");
 444                         iov_buffer[n] = 0;
 445
 446                         /* We can't really distinguish a zero-length datagram without any fds from EOF (both are signalled the
 447                          * same way by recvmsg()). Hence, accept either as end notification. */
 448                         if (isempty(iov_buffer) && fd < 0)
 449                                 break;
 450
 451                         if (isempty(iov_buffer) || fd < 0)
 452                                 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
 453                                                        "Invalid item sent from child.");
 454
 455                         /* Given recvmsg cannot be used with multiple io vectors if you don't know the size in advance,
 456                          * use a marker to separate the name and the optional SELinux context. */
 457                         char *selinux_label = memchr(iov_buffer, 0, n);
 458                         assert(selinux_label);
 459                         selinux_label++;
 460
 461                         add = portable_metadata_new(iov_buffer, path, selinux_label, fd);
 462                         if (!add)
 463                                 return -ENOMEM;
 464                         fd = -EBADF;
 465
 466                         /* Note that we do not initialize 'add->source' here, as the source path is not usable here as
 467                          * it refers to a path only valid in the short-living namespaced child process we forked
 468                          * here. */
 469
 470                         if (PORTABLE_METADATA_IS_UNIT(add)) {
 471                                 r = hashmap_put(unit_files, add->name, add);
 472                                 if (r < 0)
 473                                         return log_debug_errno(r, "Failed to add item to unit file list: %m");
 474
 475                                 add = NULL;
 476
 477                         } else if (PORTABLE_METADATA_IS_OS_RELEASE(add) || PORTABLE_METADATA_IS_EXTENSION_RELEASE(add)) {
 478
 479                                 assert(!os_release);
 480                                 os_release = TAKE_PTR(add);
 481                         } else
 482                                 assert_not_reached();
 483                 }
 484
 485                 r = wait_for_terminate_and_check("(sd-dissect)", child, 0);
 486                 if (r < 0)
 487                         return r;
 488                 child = 0;
 489         }
 490
 491         if (!os_release)
 492                 return sd_bus_error_setf(error,
 493                                          SD_BUS_ERROR_INVALID_ARGS,
 494                                          "Image '%s' lacks %s data, refusing.",
 495                                          path,
 496                                          path_is_extension ? "extension-release" : "os-release");
 497
 498         if (ret_unit_files)
 499                 *ret_unit_files = TAKE_PTR(unit_files);
 500
 501         if (ret_os_release)
 502                 *ret_os_release = TAKE_PTR(os_release);
 503
 504         return 0;
 505 }
 506
 507 static int extract_image_and_extensions(
 508                 const char *name_or_path,
 509                 char **matches,
 510                 char **extension_image_paths,
 511                 bool validate_sysext,
 512                 bool relax_extension_release_check,
 513                 Image **ret_image,
 514                 OrderedHashmap **ret_extension_images,
 515                 OrderedHashmap **ret_extension_releases,
 516                 PortableMetadata **ret_os_release,
 517                 Hashmap **ret_unit_files,
 518                 char ***ret_valid_prefixes,
 519                 sd_bus_error *error) {
 520
 521         _cleanup_free_ char *id = NULL, *version_id = NULL, *sysext_level = NULL;
 522         _cleanup_(portable_metadata_unrefp) PortableMetadata *os_release = NULL;
 523         _cleanup_ordered_hashmap_free_ OrderedHashmap *extension_images = NULL, *extension_releases = NULL;
 524         _cleanup_hashmap_free_ Hashmap *unit_files = NULL;
 525         _cleanup_strv_free_ char **valid_prefixes = NULL;
 526         _cleanup_(image_unrefp) Image *image = NULL;
 527         Image *ext;
 528         int r;
 529
 530         assert(name_or_path);
 531
 532         r = image_find_harder(IMAGE_PORTABLE, name_or_path, NULL, &image);
 533         if (r < 0)
 534                 return r;
 535
 536         if (!strv_isempty(extension_image_paths)) {
 537                 extension_images = ordered_hashmap_new(&image_hash_ops);
 538                 if (!extension_images)
 539                         return -ENOMEM;
 540
 541                 if (ret_extension_releases) {
 542                         extension_releases = ordered_hashmap_new(&portable_metadata_hash_ops);
 543                         if (!extension_releases)
 544                                 return -ENOMEM;
 545                 }
 546
 547                 STRV_FOREACH(p, extension_image_paths) {
 548                         _cleanup_(image_unrefp) Image *new = NULL;
 549
 550                         r = image_find_harder(IMAGE_PORTABLE, *p, NULL, &new);
 551                         if (r < 0)
 552                                 return r;
 553
 554                         r = ordered_hashmap_put(extension_images, new->name, new);
 555                         if (r < 0)
 556                                 return r;
 557                         TAKE_PTR(new);
 558                 }
 559         }
 560
 561         r = portable_extract_by_path(image->path, /* path_is_extension= */ false, /* relax_extension_release_check= */ false, matches, &os_release, &unit_files, error);
 562         if (r < 0)
 563                 return r;
 564
 565         /* If we are layering extension images on top of a runtime image, check that the os-release and
 566          * extension-release metadata match, otherwise reject it immediately as invalid, or it will fail when
 567          * the units are started. Also, collect valid portable prefixes if caller requested that. */
 568         if (validate_sysext || ret_valid_prefixes) {
 569                 _cleanup_fclose_ FILE *f = NULL;
 570                 _cleanup_free_ char *prefixes = NULL;
 571
 572                 r = take_fdopen_unlocked(&os_release->fd, "r", &f);
 573                 if (r < 0)
 574                         return r;
 575
 576                 r = parse_env_file(f, os_release->name,
 577                                    "ID", &id,
 578                                    "VERSION_ID", &version_id,
 579                                    "SYSEXT_LEVEL", &sysext_level,
 580                                    "PORTABLE_PREFIXES", &prefixes);
 581                 if (r < 0)
 582                         return r;
 583                 if (isempty(id))
 584                         return sd_bus_error_set_errnof(error, SYNTHETIC_ERRNO(ESTALE), "Image %s os-release metadata lacks the ID field", name_or_path);
 585
 586                 if (prefixes) {
 587                         valid_prefixes = strv_split(prefixes, WHITESPACE);
 588                         if (!valid_prefixes)
 589                                 return -ENOMEM;
 590                 }
 591         }
 592
 593         ORDERED_HASHMAP_FOREACH(ext, extension_images) {
 594                 _cleanup_(portable_metadata_unrefp) PortableMetadata *extension_release_meta = NULL;
 595                 _cleanup_hashmap_free_ Hashmap *extra_unit_files = NULL;
 596                 _cleanup_strv_free_ char **extension_release = NULL;
 597                 _cleanup_fclose_ FILE *f = NULL;
 598                 const char *e;
 599
 600                 r = portable_extract_by_path(ext->path, /* path_is_extension= */ true, relax_extension_release_check, matches, &extension_release_meta, &extra_unit_files, error);
 601                 if (r < 0)
 602                         return r;
 603
 604                 r = hashmap_move(unit_files, extra_unit_files);
 605                 if (r < 0)
 606                         return r;
 607
 608                 if (!validate_sysext && !ret_valid_prefixes && !ret_extension_releases)
 609                         continue;
 610
 611                 /* We need to keep the fd valid, to return the PortableMetadata to the caller. */
 612                 r = fdopen_independent(extension_release_meta->fd, "re", &f);
 613                 if (r < 0)
 614                         return r;
 615
 616                 r = load_env_file_pairs(f, extension_release_meta->name, &extension_release);
 617                 if (r < 0)
 618                         return r;
 619
 620                 if (validate_sysext) {
 621                         r = extension_release_validate(ext->path, id, version_id, sysext_level, "portable", extension_release);
 622                         if (r == 0)
 623                                 return sd_bus_error_set_errnof(error, SYNTHETIC_ERRNO(ESTALE), "Image %s extension-release metadata does not match the root's", ext->path);
 624                         if (r < 0)
 625                                 return sd_bus_error_set_errnof(error, r, "Failed to compare image %s extension-release metadata with the root's os-release: %m", ext->path);
 626                 }
 627
 628                 e = strv_env_pairs_get(extension_release, "PORTABLE_PREFIXES");
 629                 if (e) {
 630                         _cleanup_strv_free_ char **l = NULL;
 631
 632                         l = strv_split(e, WHITESPACE);
 633                         if (!l)
 634                                 return -ENOMEM;
 635
 636                         r = strv_extend_strv(&valid_prefixes, l, true);
 637                         if (r < 0)
 638                                 return r;
 639                 }
 640
 641                 if (ret_extension_releases) {
 642                         r = ordered_hashmap_put(extension_releases, ext->name, extension_release_meta);
 643                         if (r < 0)
 644                                 return r;
 645                         TAKE_PTR(extension_release_meta);
 646                 }
 647         }
 648
 649         strv_sort(valid_prefixes);
 650
 651         if (ret_image)
 652                 *ret_image = TAKE_PTR(image);
 653         if (ret_extension_images)
 654                 *ret_extension_images = TAKE_PTR(extension_images);
 655         if (ret_extension_releases)
 656                 *ret_extension_releases = TAKE_PTR(extension_releases);
 657         if (ret_os_release)
 658                 *ret_os_release = TAKE_PTR(os_release);
 659         if (ret_unit_files)
 660                 *ret_unit_files = TAKE_PTR(unit_files);
 661         if (ret_valid_prefixes)
 662                 *ret_valid_prefixes = TAKE_PTR(valid_prefixes);
 663
 664         return 0;
 665 }
 666
 667 int portable_extract(
 668                 const char *name_or_path,
 669                 char **matches,
 670                 char **extension_image_paths,
 671                 PortableFlags flags,
 672                 PortableMetadata **ret_os_release,
 673                 OrderedHashmap **ret_extension_releases,
 674                 Hashmap **ret_unit_files,
 675                 char ***ret_valid_prefixes,
 676                 sd_bus_error *error) {
 677
 678         _cleanup_(portable_metadata_unrefp) PortableMetadata *os_release = NULL;
 679         _cleanup_ordered_hashmap_free_ OrderedHashmap *extension_images = NULL, *extension_releases = NULL;
 680         _cleanup_hashmap_free_ Hashmap *unit_files = NULL;
 681         _cleanup_(strv_freep) char **valid_prefixes = NULL;
 682         _cleanup_(image_unrefp) Image *image = NULL;
 683         int r;
 684
 685         assert(name_or_path);
 686
 687         r = extract_image_and_extensions(
 688                         name_or_path,
 689                         matches,
 690                         extension_image_paths,
 691                         /* validate_sysext= */ false,
 692                         /* relax_extension_release_check= */ FLAGS_SET(flags, PORTABLE_FORCE_SYSEXT),
 693                         &image,
 694                         &extension_images,
 695                         &extension_releases,
 696                         &os_release,
 697                         &unit_files,
 698                         ret_valid_prefixes ? &valid_prefixes : NULL,
 699                         error);
 700         if (r < 0)
 701                 return r;
 702
 703         if (hashmap_isempty(unit_files)) {
 704                 _cleanup_free_ char *extensions = strv_join(extension_image_paths, ", ");
 705                 if (!extensions)
 706                         return -ENOMEM;
 707
 708                 return sd_bus_error_setf(error,
 709                                          SD_BUS_ERROR_INVALID_ARGS,
 710                                          "Couldn't find any matching unit files in image '%s%s%s', refusing.",
 711                                          image->path,
 712                                          isempty(extensions) ? "" : "' or any of its extensions '",
 713                                          isempty(extensions) ? "" : extensions);
 714         }
 715
 716         if (ret_os_release)
 717                 *ret_os_release = TAKE_PTR(os_release);
 718         if (ret_extension_releases)
 719                 *ret_extension_releases = TAKE_PTR(extension_releases);
 720         if (ret_unit_files)
 721                 *ret_unit_files = TAKE_PTR(unit_files);
 722         if (ret_valid_prefixes)
 723                 *ret_valid_prefixes = TAKE_PTR(valid_prefixes);
 724
 725         return 0;
 726 }
 727
 728 static int unit_file_is_active(
 729                 sd_bus *bus,
 730                 const char *name,
 731                 sd_bus_error *error) {
 732
 733         static const char *const active_states[] = {
 734                 "activating",
 735                 "active",
 736                 "reloading",
 737                 "deactivating",
 738                 NULL,
 739         };
 740         int r;
 741
 742         if (!bus)
 743                 return false;
 744
 745         /* If we are looking at a plain or instance things are easy, we can just query the state */
 746         if (unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) {
 747                 _cleanup_free_ char *path = NULL, *buf = NULL;
 748
 749                 path = unit_dbus_path_from_name(name);
 750                 if (!path)
 751                         return -ENOMEM;
 752
 753                 r = sd_bus_get_property_string(
 754                                 bus,
 755                                 "org.freedesktop.systemd1",
 756                                 path,
 757                                 "org.freedesktop.systemd1.Unit",
 758                                 "ActiveState",
 759                                 error,
 760                                 &buf);
 761                 if (r < 0)
 762                         return log_debug_errno(r, "Failed to retrieve unit state: %s", bus_error_message(error, r));
 763
 764                 return strv_contains((char**) active_states, buf);
 765         }
 766
 767         /* Otherwise we need to enumerate. But let's build the most restricted query we can */
 768         if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) {
 769                 _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
 770                 const char *at, *prefix, *joined;
 771
 772                 r = sd_bus_message_new_method_call(
 773                                 bus,
 774                                 &m,
 775                                 "org.freedesktop.systemd1",
 776                                 "/org/freedesktop/systemd1",
 777                                 "org.freedesktop.systemd1.Manager",
 778                                 "ListUnitsByPatterns");
 779                 if (r < 0)
 780                         return r;
 781
 782                 r = sd_bus_message_append_strv(m, (char**) active_states);
 783                 if (r < 0)
 784                         return r;
 785
 786                 at = strchr(name, '@');
 787                 assert(at);
 788
 789                 prefix = strndupa_safe(name, at + 1 - name);
 790                 joined = strjoina(prefix, "*", at + 1);
 791
 792                 r = sd_bus_message_append_strv(m, STRV_MAKE(joined));
 793                 if (r < 0)
 794                         return r;
 795
 796                 r = sd_bus_call(bus, m, 0, error, &reply);
 797                 if (r < 0)
 798                         return log_debug_errno(r, "Failed to list units: %s", bus_error_message(error, r));
 799
 800                 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssssouso)");
 801                 if (r < 0)
 802                         return r;
 803
 804                 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_STRUCT, "ssssssouso");
 805                 if (r < 0)
 806                         return r;
 807
 808                 return r > 0;
 809         }
 810
 811         return -EINVAL;
 812 }
 813
 814 static int portable_changes_add(
 815                 PortableChange **changes,
 816                 size_t *n_changes,
 817                 int type_or_errno, /* PORTABLE_COPY, PORTABLE_SYMLINK, … if positive, or errno if negative */
 818                 const char *path,
 819                 const char *source) {
 820
 821         _cleanup_free_ char *p = NULL, *s = NULL;
 822         PortableChange *c;
 823
 824         assert(path);
 825         assert(!changes == !n_changes);
 826
 827         if (type_or_errno >= 0)
 828                 assert(type_or_errno < _PORTABLE_CHANGE_TYPE_MAX);
 829         else
 830                 assert(type_or_errno >= -ERRNO_MAX);
 831
 832         if (!changes)
 833                 return 0;
 834
 835         c = reallocarray(*changes, *n_changes + 1, sizeof(PortableChange));
 836         if (!c)
 837                 return -ENOMEM;
 838         *changes = c;
 839
 840         p = strdup(path);
 841         if (!p)
 842                 return -ENOMEM;
 843
 844         path_simplify(p);
 845
 846         if (source) {
 847                 s = strdup(source);
 848                 if (!s)
 849                         return -ENOMEM;
 850
 851                 path_simplify(s);
 852         }
 853
 854         c[(*n_changes)++] = (PortableChange) {
 855                 .type_or_errno = type_or_errno,
 856                 .path = TAKE_PTR(p),
 857                 .source = TAKE_PTR(s),
 858         };
 859
 860         return 0;
 861 }
 862
 863 static int portable_changes_add_with_prefix(
 864                 PortableChange **changes,
 865                 size_t *n_changes,
 866                 int type_or_errno,
 867                 const char *prefix,
 868                 const char *path,
 869                 const char *source) {
 870
 871         _cleanup_free_ char *path_buf = NULL, *source_buf = NULL;
 872
 873         assert(path);
 874         assert(!changes == !n_changes);
 875
 876         if (!changes)
 877                 return 0;
 878
 879         if (prefix) {
 880                 path_buf = path_join(prefix, path);
 881                 if (!path_buf)
 882                         return -ENOMEM;
 883
 884                 path = path_buf;
 885
 886                 if (source) {
 887                         source_buf = path_join(prefix, source);
 888                         if (!source_buf)
 889                                 return -ENOMEM;
 890
 891                         source = source_buf;
 892                 }
 893         }
 894
 895         return portable_changes_add(changes, n_changes, type_or_errno, path, source);
 896 }
 897
 898 void portable_changes_free(PortableChange *changes, size_t n_changes) {
 899         size_t i;
 900
 901         assert(changes || n_changes == 0);
 902
 903         for (i = 0; i < n_changes; i++) {
 904                 free(changes[i].path);
 905                 free(changes[i].source);
 906         }
 907
 908         free(changes);
 909 }
 910
 911 static const char *root_setting_from_image(ImageType type) {
 912         return IN_SET(type, IMAGE_DIRECTORY, IMAGE_SUBVOLUME) ? "RootDirectory=" : "RootImage=";
 913 }
 914
 915 static const char *extension_setting_from_image(ImageType type) {
 916         return IN_SET(type, IMAGE_DIRECTORY, IMAGE_SUBVOLUME) ? "ExtensionDirectories=" : "ExtensionImages=";
 917 }
 918
 919 static int make_marker_text(const char *image_path, OrderedHashmap *extension_images, char **ret_text) {
 920         _cleanup_free_ char *text = NULL, *escaped_image_path = NULL;
 921         Image *ext;
 922
 923         assert(image_path);
 924         assert(ret_text);
 925
 926         escaped_image_path = xescape(image_path, ":");
 927         if (!escaped_image_path)
 928                 return -ENOMEM;
 929
 930         /* If the image is layered, include all layers in the marker as a colon-separated
 931          * list of paths, so that we can do exact matches on removal. */
 932         text = strjoin(PORTABLE_DROPIN_MARKER_BEGIN, escaped_image_path);
 933         if (!text)
 934                 return -ENOMEM;
 935
 936         ORDERED_HASHMAP_FOREACH(ext, extension_images) {
 937                 _cleanup_free_ char *escaped = NULL;
 938
 939                 escaped = xescape(ext->path, ":");
 940                 if (!escaped)
 941                         return -ENOMEM;
 942
 943                 if (!strextend(&text, ":", escaped))
 944                         return -ENOMEM;
 945         }
 946
 947         if (!strextend(&text, PORTABLE_DROPIN_MARKER_END "\n"))
 948                 return -ENOMEM;
 949
 950         *ret_text = TAKE_PTR(text);
 951         return 0;
 952 }
 953
 954 static int install_chroot_dropin(
 955                 const char *image_path,
 956                 ImageType type,
 957                 OrderedHashmap *extension_images,
 958                 const PortableMetadata *m,
 959                 const char *dropin_dir,
 960                 PortableFlags flags,
 961                 char **ret_dropin,
 962                 PortableChange **changes,
 963                 size_t *n_changes) {
 964
 965         _cleanup_free_ char *text = NULL, *dropin = NULL;
 966         int r;
 967
 968         assert(image_path);
 969         assert(m);
 970         assert(dropin_dir);
 971
 972         dropin = path_join(dropin_dir, "20-portable.conf");
 973         if (!dropin)
 974                 return -ENOMEM;
 975
 976         r = make_marker_text(image_path, extension_images, &text);
 977         if (r < 0)
 978                 return log_debug_errno(r, "Failed to generate marker string for portable drop-in: %m");
 979
 980         if (endswith(m->name, ".service")) {
 981                 const char *os_release_source, *root_type;
 982                 _cleanup_free_ char *base_name = NULL;
 983                 Image *ext;
 984
 985                 root_type = root_setting_from_image(type);
 986
 987                 if (access("/etc/os-release", F_OK) < 0) {
 988                         if (errno != ENOENT)
 989                                 return log_debug_errno(errno, "Failed to check if /etc/os-release exists: %m");
 990
 991                         os_release_source = "/usr/lib/os-release";
 992                 } else
 993                         os_release_source = "/etc/os-release";
 994
 995                 r = path_extract_filename(m->image_path ?: image_path, &base_name);
 996                 if (r < 0)
 997                         return log_debug_errno(r, "Failed to extract basename from '%s': %m", m->image_path ?: image_path);
 998
 999                 if (!strextend(&text,
1000                                "\n"
1001                                "[Service]\n",
1002                                root_type, image_path, "\n"
1003                                "Environment=PORTABLE=", base_name, "\n"
1004                                "BindReadOnlyPaths=", os_release_source, ":/run/host/os-release\n"
1005                                "LogExtraFields=PORTABLE=", base_name, "\n"))
1006                         return -ENOMEM;
1007
1008                 if (m->image_path && !path_equal(m->image_path, image_path))
1009                         ORDERED_HASHMAP_FOREACH(ext, extension_images)
1010                                 if (!strextend(&text,
1011                                                extension_setting_from_image(ext->type),
1012                                                ext->path,
1013                                                /* With --force tell PID1 to avoid enforcing that the image <name> and
1014                                                 * extension-release.<name> have to match. */
1015                                                !IN_SET(type, IMAGE_DIRECTORY, IMAGE_SUBVOLUME) &&
1016                                                    FLAGS_SET(flags, PORTABLE_FORCE_SYSEXT) ?
1017                                                        ":x-systemd.relax-extension-release-check" :
1018                                                        "",
1019                                                "\n"))
1020                                         return -ENOMEM;
1021         }
1022
1023         r = write_string_file(dropin, text, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC);
1024         if (r < 0)
1025                 return log_debug_errno(r, "Failed to write '%s': %m", dropin);
1026
1027         (void) portable_changes_add(changes, n_changes, PORTABLE_WRITE, dropin, NULL);
1028
1029         if (ret_dropin)
1030                 *ret_dropin = TAKE_PTR(dropin);
1031
1032         return 0;
1033 }
1034
1035 static int install_profile_dropin(
1036                 const char *image_path,
1037                 const PortableMetadata *m,
1038                 const char *dropin_dir,
1039                 const char *profile,
1040                 PortableFlags flags,
1041                 char **ret_dropin,
1042                 PortableChange **changes,
1043                 size_t *n_changes) {
1044
1045         _cleanup_free_ char *dropin = NULL, *from = NULL;
1046         int r;
1047
1048         assert(image_path);
1049         assert(m);
1050         assert(dropin_dir);
1051
1052         if (!profile)
1053                 return 0;
1054
1055         r = find_portable_profile(profile, m->name, &from);
1056         if (r < 0) {
1057                 if (r != -ENOENT)
1058                         return log_debug_errno(errno, "Profile '%s' is not accessible: %m", profile);
1059
1060                 log_debug_errno(errno, "Skipping link to profile '%s', as it does not exist: %m", profile);
1061                 return 0;
1062         }
1063
1064         dropin = path_join(dropin_dir, "10-profile.conf");
1065         if (!dropin)
1066                 return -ENOMEM;
1067
1068         if (flags & PORTABLE_PREFER_COPY) {
1069
1070                 r = copy_file_atomic(from, dropin, 0644, COPY_REFLINK);
1071                 if (r < 0)
1072                         return log_debug_errno(r, "Failed to copy %s %s %s: %m", from, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), dropin);
1073
1074                 (void) portable_changes_add(changes, n_changes, PORTABLE_COPY, dropin, from);
1075
1076         } else {
1077
1078                 if (symlink(from, dropin) < 0)
1079                         return log_debug_errno(errno, "Failed to link %s %s %s: %m", from, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), dropin);
1080
1081                 (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, dropin, from);
1082         }
1083
1084         if (ret_dropin)
1085                 *ret_dropin = TAKE_PTR(dropin);
1086
1087         return 0;
1088 }
1089
1090 static const char *attached_path(const LookupPaths *paths, PortableFlags flags) {
1091         const char *where;
1092
1093         assert(paths);
1094
1095         if (flags & PORTABLE_RUNTIME)
1096                 where = paths->runtime_attached;
1097         else
1098                 where = paths->persistent_attached;
1099
1100         assert(where);
1101         return where;
1102 }
1103
1104 static int attach_unit_file(
1105                 const LookupPaths *paths,
1106                 const char *image_path,
1107                 ImageType type,
1108                 OrderedHashmap *extension_images,
1109                 const PortableMetadata *m,
1110                 const char *profile,
1111                 PortableFlags flags,
1112                 PortableChange **changes,
1113                 size_t *n_changes) {
1114
1115         _cleanup_(unlink_and_freep) char *chroot_dropin = NULL, *profile_dropin = NULL;
1116         _cleanup_(rmdir_and_freep) char *dropin_dir = NULL;
1117         _cleanup_free_ char *path = NULL;
1118         const char *where;
1119         int r;
1120
1121         assert(paths);
1122         assert(image_path);
1123         assert(m);
1124         assert(PORTABLE_METADATA_IS_UNIT(m));
1125
1126         where = attached_path(paths, flags);
1127
1128         (void) mkdir_parents(where, 0755);
1129         if (mkdir(where, 0755) < 0) {
1130                 if (errno != EEXIST)
1131                         return log_debug_errno(errno, "Failed to create attach directory %s: %m", where);
1132         } else
1133                 (void) portable_changes_add(changes, n_changes, PORTABLE_MKDIR, where, NULL);
1134
1135         path = path_join(where, m->name);
1136         if (!path)
1137                 return -ENOMEM;
1138
1139         dropin_dir = strjoin(path, ".d");
1140         if (!dropin_dir)
1141                 return -ENOMEM;
1142
1143         if (mkdir(dropin_dir, 0755) < 0) {
1144                 if (errno != EEXIST)
1145                         return log_debug_errno(errno, "Failed to create drop-in directory %s: %m", dropin_dir);
1146         } else
1147                 (void) portable_changes_add(changes, n_changes, PORTABLE_MKDIR, dropin_dir, NULL);
1148
1149         /* We install the drop-ins first, and the actual unit file last to achieve somewhat atomic behaviour if PID 1
1150          * is reloaded while we are creating things here: as long as only the drop-ins exist the unit doesn't exist at
1151          * all for PID 1. */
1152
1153         r = install_chroot_dropin(image_path, type, extension_images, m, dropin_dir, flags, &chroot_dropin, changes, n_changes);
1154         if (r < 0)
1155                 return r;
1156
1157         r = install_profile_dropin(image_path, m, dropin_dir, profile, flags, &profile_dropin, changes, n_changes);
1158         if (r < 0)
1159                 return r;
1160
1161         if ((flags & PORTABLE_PREFER_SYMLINK) && m->source) {
1162
1163                 if (symlink(m->source, path) < 0)
1164                         return log_debug_errno(errno, "Failed to symlink unit file '%s': %m", path);
1165
1166                 (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, path, m->source);
1167
1168         } else {
1169                 _cleanup_(unlink_and_freep) char *tmp = NULL;
1170                 _cleanup_close_ int fd = -EBADF;
1171
1172                 (void) mac_selinux_create_file_prepare_label(path, m->selinux_label);
1173
1174                 fd = open_tmpfile_linkable(path, O_WRONLY|O_CLOEXEC, &tmp);
1175                 mac_selinux_create_file_clear(); /* Clear immediately in case of errors */
1176                 if (fd < 0)
1177                         return log_debug_errno(fd, "Failed to create unit file '%s': %m", path);
1178
1179                 r = copy_bytes(m->fd, fd, UINT64_MAX, COPY_REFLINK);
1180                 if (r < 0)
1181                         return log_debug_errno(r, "Failed to copy unit file '%s': %m", path);
1182
1183                 if (fchmod(fd, 0644) < 0)
1184                         return log_debug_errno(errno, "Failed to change unit file access mode for '%s': %m", path);
1185
1186                 r = link_tmpfile(fd, tmp, path, /* replace= */ false);
1187                 if (r < 0)
1188                         return log_debug_errno(r, "Failed to install unit file '%s': %m", path);
1189
1190                 tmp = mfree(tmp);
1191
1192                 (void) portable_changes_add(changes, n_changes, PORTABLE_COPY, path, m->source);
1193         }
1194
1195         /* All is established now, now let's disable any rollbacks */
1196         chroot_dropin = mfree(chroot_dropin);
1197         profile_dropin = mfree(profile_dropin);
1198         dropin_dir = mfree(dropin_dir);
1199
1200         return 0;
1201 }
1202
1203 static int image_symlink(
1204                 const char *image_path,
1205                 PortableFlags flags,
1206                 char **ret) {
1207
1208         const char *fn, *where;
1209         char *joined = NULL;
1210
1211         assert(image_path);
1212         assert(ret);
1213
1214         fn = last_path_component(image_path);
1215
1216         if (flags & PORTABLE_RUNTIME)
1217                 where = "/run/portables/";
1218         else
1219                 where = "/etc/portables/";
1220
1221         joined = strjoin(where, fn);
1222         if (!joined)
1223                 return -ENOMEM;
1224
1225         *ret = joined;
1226         return 0;
1227 }
1228
1229 static int install_image_symlink(
1230                 const char *image_path,
1231                 PortableFlags flags,
1232                 PortableChange **changes,
1233                 size_t *n_changes) {
1234
1235         _cleanup_free_ char *sl = NULL;
1236         int r;
1237
1238         assert(image_path);
1239
1240         /* If the image is outside of the image search also link it into it, so that it can be found with short image
1241          * names and is listed among the images. */
1242
1243         if (image_in_search_path(IMAGE_PORTABLE, NULL, image_path))
1244                 return 0;
1245
1246         r = image_symlink(image_path, flags, &sl);
1247         if (r < 0)
1248                 return log_debug_errno(r, "Failed to generate image symlink path: %m");
1249
1250         (void) mkdir_parents(sl, 0755);
1251
1252         if (symlink(image_path, sl) < 0)
1253                 return log_debug_errno(errno, "Failed to link %s %s %s: %m", image_path, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), sl);
1254
1255         (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, sl, image_path);
1256         return 0;
1257 }
1258
1259 static int install_image_and_extensions_symlinks(
1260                 const Image *image,
1261                 OrderedHashmap *extension_images,
1262                 PortableFlags flags,
1263                 PortableChange **changes,
1264                 size_t *n_changes) {
1265
1266         Image *ext;
1267         int r;
1268
1269         assert(image);
1270
1271         ORDERED_HASHMAP_FOREACH(ext, extension_images) {
1272                 r = install_image_symlink(ext->path, flags, changes, n_changes);
1273                 if (r < 0)
1274                         return r;
1275         }
1276
1277         r = install_image_symlink(image->path, flags, changes, n_changes);
1278         if (r < 0)
1279                 return r;
1280
1281         return 0;
1282 }
1283
1284 static bool prefix_matches_compatible(char **matches, char **valid_prefixes) {
1285         /* Checks if all 'matches' are included in the list of 'valid_prefixes' */
1286
1287         STRV_FOREACH(m, matches)
1288                 if (!strv_contains(valid_prefixes, *m))
1289                         return false;
1290
1291         return true;
1292 }
1293
1294 int portable_attach(
1295                 sd_bus *bus,
1296                 const char *name_or_path,
1297                 char **matches,
1298                 const char *profile,
1299                 char **extension_image_paths,
1300                 PortableFlags flags,
1301                 PortableChange **changes,
1302                 size_t *n_changes,
1303                 sd_bus_error *error) {
1304
1305         _cleanup_ordered_hashmap_free_ OrderedHashmap *extension_images = NULL;
1306         _cleanup_hashmap_free_ Hashmap *unit_files = NULL;
1307         _cleanup_(lookup_paths_free) LookupPaths paths = {};
1308         _cleanup_strv_free_ char **valid_prefixes = NULL;
1309         _cleanup_(image_unrefp) Image *image = NULL;
1310         PortableMetadata *item;
1311         int r;
1312
1313         r = extract_image_and_extensions(
1314                         name_or_path,
1315                         matches,
1316                         extension_image_paths,
1317                         /* validate_sysext= */ true,
1318                         /* relax_extension_release_check= */ FLAGS_SET(flags, PORTABLE_FORCE_SYSEXT),
1319                         &image,
1320                         &extension_images,
1321                         /* extension_releases= */ NULL,
1322                         /* os_release= */ NULL,
1323                         &unit_files,
1324                         &valid_prefixes,
1325                         error);
1326         if (r < 0)
1327                 return r;
1328
1329         if (valid_prefixes && !prefix_matches_compatible(matches, valid_prefixes)) {
1330                 _cleanup_free_ char *matches_joined = NULL, *extensions_joined = NULL, *valid_prefixes_joined = NULL;
1331
1332                 matches_joined = strv_join(matches, "', '");
1333                 if (!matches_joined)
1334                         return -ENOMEM;
1335
1336                 extensions_joined = strv_join(extension_image_paths, ", ");
1337                 if (!extensions_joined)
1338                         return -ENOMEM;
1339
1340                 valid_prefixes_joined = strv_join(valid_prefixes, ", ");
1341                 if (!valid_prefixes_joined)
1342                         return -ENOMEM;
1343
1344                 return sd_bus_error_setf(
1345                                 error,
1346                                 SD_BUS_ERROR_INVALID_ARGS,
1347                                 "Selected matches '%s' are not compatible with portable service image '%s%s%s', refusing. (Acceptable prefix matches are: %s)",
1348                                 matches_joined,
1349                                 image->path,
1350                                 isempty(extensions_joined) ? "" : "' or any of its extensions '",
1351                                 strempty(extensions_joined),
1352                                 valid_prefixes_joined);
1353         }
1354
1355         if (hashmap_isempty(unit_files)) {
1356                 _cleanup_free_ char *extensions_joined = strv_join(extension_image_paths, ", ");
1357                 if (!extensions_joined)
1358                         return -ENOMEM;
1359
1360                 return sd_bus_error_setf(
1361                                 error,
1362                                 SD_BUS_ERROR_INVALID_ARGS,
1363                                 "Couldn't find any matching unit files in image '%s%s%s', refusing.",
1364                                 image->path,
1365                                 isempty(extensions_joined) ? "" : "' or any of its extensions '",
1366                                 strempty(extensions_joined));
1367         }
1368
1369         r = lookup_paths_init(&paths, RUNTIME_SCOPE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL);
1370         if (r < 0)
1371                 return r;
1372
1373         if (!FLAGS_SET(flags, PORTABLE_REATTACH) && !FLAGS_SET(flags, PORTABLE_FORCE_ATTACH))
1374                 HASHMAP_FOREACH(item, unit_files) {
1375                         r = unit_file_exists(RUNTIME_SCOPE_SYSTEM, &paths, item->name);
1376                         if (r < 0)
1377                                 return sd_bus_error_set_errnof(error, r, "Failed to determine whether unit '%s' exists on the host: %m", item->name);
1378                         if (r > 0)
1379                                 return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' exists on the host already, refusing.", item->name);
1380
1381                         r = unit_file_is_active(bus, item->name, error);
1382                         if (r < 0)
1383                                 return r;
1384                         if (r > 0)
1385                                 return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' is active already, refusing.", item->name);
1386                 }
1387
1388         HASHMAP_FOREACH(item, unit_files) {
1389                 r = attach_unit_file(&paths, image->path, image->type, extension_images,
1390                                      item, profile, flags, changes, n_changes);
1391                 if (r < 0)
1392                         return sd_bus_error_set_errnof(error, r, "Failed to attach unit '%s': %m", item->name);
1393         }
1394
1395         /* We don't care too much for the image symlink, it's just a convenience thing, it's not necessary for proper
1396          * operation otherwise. */
1397         (void) install_image_and_extensions_symlinks(image, extension_images, flags, changes, n_changes);
1398
1399         return 0;
1400 }
1401
1402 static bool marker_matches_images(const char *marker, const char *name_or_path, char **extension_image_paths) {
1403         _cleanup_strv_free_ char **root_and_extensions = NULL;
1404         const char *a;
1405         int r;
1406
1407         assert(marker);
1408         assert(name_or_path);
1409
1410         /* If extensions were used when attaching, the marker will be a colon-separated
1411          * list of images/paths. We enforce strict 1:1 matching, so that we are sure
1412          * we are detaching exactly what was attached.
1413          * For each image, starting with the root, we look for a token in the marker,
1414          * and return a negative answer on any non-matching combination. */
1415
1416         root_and_extensions = strv_new(name_or_path);
1417         if (!root_and_extensions)
1418                 return -ENOMEM;
1419
1420         r = strv_extend_strv(&root_and_extensions, extension_image_paths, false);
1421         if (r < 0)
1422                 return r;
1423
1424         STRV_FOREACH(image_name_or_path, root_and_extensions) {
1425                 _cleanup_free_ char *image = NULL;
1426
1427                 r = extract_first_word(&marker, &image, ":", EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
1428                 if (r < 0)
1429                         return log_debug_errno(r, "Failed to parse marker: %s", marker);
1430                 if (r == 0)
1431                         return false;
1432
1433                 a = last_path_component(image);
1434
1435                 if (image_name_is_valid(*image_name_or_path)) {
1436                         const char *e, *underscore;
1437
1438                         /* We shall match against an image name. In that case let's compare the last component, and optionally
1439                         * allow either a suffix of ".raw" or a series of "/".
1440                         * But allow matching on a different version of the same image, when a "_" is used as a separator. */
1441                         underscore = strchr(*image_name_or_path, '_');
1442                         if (underscore) {
1443                                 if (strneq(a, *image_name_or_path, underscore - *image_name_or_path))
1444                                         continue;
1445                                 return false;
1446                         }
1447
1448                         e = startswith(a, *image_name_or_path);
1449                         if (!e)
1450                                 return false;
1451
1452                         if(!(e[strspn(e, "/")] == 0 || streq(e, ".raw")))
1453                                 return false;
1454                 } else {
1455                         const char *b, *underscore;
1456                         size_t l;
1457
1458                         /* We shall match against a path. Let's ignore any prefix here though, as often there are many ways to
1459                          * reach the same file. However, in this mode, let's validate any file suffix.
1460                          * But also ensure that we don't fail if both components don't have a '/' at all
1461                          * (strcspn returns the full length of the string in that case, which might not
1462                          * match as the versions might differ). */
1463
1464                         l = strcspn(a, "/");
1465                         b = last_path_component(*image_name_or_path);
1466
1467                         if ((a[l] != '/') != !strchr(b, '/')) /* One is a directory, the other is not */
1468                                 return false;
1469
1470                         if (a[l] != 0 && strcspn(b, "/") != l)
1471                                 return false;
1472
1473                         underscore = strchr(b, '_');
1474                         if (underscore)
1475                                 l = underscore - b;
1476                         else { /* Either component could be versioned */
1477                                 underscore = strchr(a, '_');
1478                                 if (underscore)
1479                                         l = underscore - a;
1480                         }
1481
1482                         if (!strneq(a, b, l))
1483                                 return false;
1484                 }
1485         }
1486
1487         return true;
1488 }
1489
1490 static int test_chroot_dropin(
1491                 DIR *d,
1492                 const char *where,
1493                 const char *fname,
1494                 const char *name_or_path,
1495                 char **extension_image_paths,
1496                 char **ret_marker) {
1497
1498         _cleanup_free_ char *line = NULL, *marker = NULL;
1499         _cleanup_fclose_ FILE *f = NULL;
1500         _cleanup_close_ int fd = -EBADF;
1501         const char *p, *e, *k;
1502         int r;
1503
1504         assert(d);
1505         assert(where);
1506         assert(fname);
1507
1508         /* We recognize unis created from portable images via the drop-in we created for them */
1509
1510         p = strjoina(fname, ".d/20-portable.conf");
1511         fd = openat(dirfd(d), p, O_RDONLY|O_CLOEXEC);
1512         if (fd < 0) {
1513                 if (errno == ENOENT)
1514                         return 0;
1515
1516                 return log_debug_errno(errno, "Failed to open %s/%s: %m", where, p);
1517         }
1518
1519         r = take_fdopen_unlocked(&fd, "r", &f);
1520         if (r < 0)
1521                 return log_debug_errno(r, "Failed to convert file handle: %m");
1522
1523         r = read_line(f, LONG_LINE_MAX, &line);
1524         if (r < 0)
1525                 return log_debug_errno(r, "Failed to read from %s/%s: %m", where, p);
1526
1527         e = startswith(line, PORTABLE_DROPIN_MARKER_BEGIN);
1528         if (!e)
1529                 return 0;
1530
1531         k = endswith(e, PORTABLE_DROPIN_MARKER_END);
1532         if (!k)
1533                 return 0;
1534
1535         marker = strndup(e, k - e);
1536         if (!marker)
1537                 return -ENOMEM;
1538
1539         if (!name_or_path)
1540                 r = true;
1541         else
1542                 r = marker_matches_images(marker, name_or_path, extension_image_paths);
1543
1544         if (ret_marker)
1545                 *ret_marker = TAKE_PTR(marker);
1546
1547         return r;
1548 }
1549
1550 int portable_detach(
1551                 sd_bus *bus,
1552                 const char *name_or_path,
1553                 char **extension_image_paths,
1554                 PortableFlags flags,
1555                 PortableChange **changes,
1556                 size_t *n_changes,
1557                 sd_bus_error *error) {
1558
1559         _cleanup_(lookup_paths_free) LookupPaths paths = {};
1560         _cleanup_set_free_ Set *unit_files = NULL, *markers = NULL;
1561         _cleanup_free_ char *extensions = NULL;
1562         _cleanup_closedir_ DIR *d = NULL;
1563         const char *where, *item;
1564         int ret = 0;
1565         int r;
1566
1567         assert(name_or_path);
1568
1569         r = lookup_paths_init(&paths, RUNTIME_SCOPE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL);
1570         if (r < 0)
1571                 return r;
1572
1573         where = attached_path(&paths, flags);
1574
1575         d = opendir(where);
1576         if (!d) {
1577                 if (errno == ENOENT)
1578                         goto not_found;
1579
1580                 return log_debug_errno(errno, "Failed to open '%s' directory: %m", where);
1581         }
1582
1583         FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to enumerate '%s' directory: %m", where)) {
1584                 _cleanup_free_ char *marker = NULL, *unit_name = NULL;
1585                 const char *dot;
1586
1587                 /* When a portable service is enabled with "portablectl --copy=symlink --enable --now attach",
1588                  * and is disabled with "portablectl --enable --now detach", which calls DisableUnitFilesWithFlags
1589                  * DBus method, the main unit file is removed, but its drop-ins are not. Hence, here we need
1590                  * to list both main unit files and drop-in directories (without the main unit files). */
1591
1592                 dot = endswith(de->d_name, ".d");
1593                 if (dot)
1594                         unit_name = strndup(de->d_name, dot - de->d_name);
1595                 else
1596                         unit_name = strdup(de->d_name);
1597                 if (!unit_name)
1598                         return -ENOMEM;
1599
1600                 if (!unit_name_is_valid(unit_name, UNIT_NAME_ANY))
1601                         continue;
1602
1603                 /* Filter out duplicates */
1604                 if (set_contains(unit_files, unit_name))
1605                         continue;
1606
1607                 if (dot ? !IN_SET(de->d_type, DT_LNK, DT_DIR) : !IN_SET(de->d_type, DT_LNK, DT_REG))
1608                         continue;
1609
1610                 r = test_chroot_dropin(d, where, unit_name, name_or_path, extension_image_paths, &marker);
1611                 if (r < 0)
1612                         return r;
1613                 if (r == 0)
1614                         continue;
1615
1616                 if (!FLAGS_SET(flags, PORTABLE_REATTACH) && !FLAGS_SET(flags, PORTABLE_FORCE_ATTACH)) {
1617                         r = unit_file_is_active(bus, unit_name, error);
1618                         if (r < 0)
1619                                 return r;
1620                         if (r > 0)
1621                                 return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' is active, can't detach.", unit_name);
1622                 }
1623
1624                 r = set_ensure_consume(&unit_files, &string_hash_ops_free, TAKE_PTR(unit_name));
1625                 if (r < 0)
1626                         return log_oom_debug();
1627
1628                 for (const char *p = marker;;) {
1629                         _cleanup_free_ char *image = NULL;
1630
1631                         r = extract_first_word(&p, &image, ":", EXTRACT_UNESCAPE_SEPARATORS|EXTRACT_RETAIN_ESCAPE);
1632                         if (r < 0)
1633                                 return log_debug_errno(r, "Failed to parse marker: %s", p);
1634                         if (r == 0)
1635                                 break;
1636
1637                         if (path_is_absolute(image) && !image_in_search_path(IMAGE_PORTABLE, NULL, image)) {
1638                                 r = set_ensure_consume(&markers, &path_hash_ops_free, TAKE_PTR(image));
1639                                 if (r < 0)
1640                                         return r;
1641                         }
1642                 }
1643         }
1644
1645         if (set_isempty(unit_files))
1646                 goto not_found;
1647
1648         SET_FOREACH(item, unit_files) {
1649                 _cleanup_free_ char *md = NULL;
1650
1651                 if (unlinkat(dirfd(d), item, 0) < 0) {
1652                         log_debug_errno(errno, "Can't remove unit file %s/%s: %m", where, item);
1653
1654                         if (errno != ENOENT && ret >= 0)
1655                                 ret = -errno;
1656                 } else
1657                         portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, item, NULL);
1658
1659                 FOREACH_STRING(suffix, ".d/10-profile.conf", ".d/20-portable.conf") {
1660                         _cleanup_free_ char *dropin = NULL;
1661
1662                         dropin = strjoin(item, suffix);
1663                         if (!dropin)
1664                                 return -ENOMEM;
1665
1666                         if (unlinkat(dirfd(d), dropin, 0) < 0) {
1667                                 log_debug_errno(errno, "Can't remove drop-in %s/%s: %m", where, dropin);
1668
1669                                 if (errno != ENOENT && ret >= 0)
1670                                         ret = -errno;
1671                         } else
1672                                 portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, dropin, NULL);
1673                 }
1674
1675                 md = strjoin(item, ".d");
1676                 if (!md)
1677                         return -ENOMEM;
1678
1679                 if (unlinkat(dirfd(d), md, AT_REMOVEDIR) < 0) {
1680                         log_debug_errno(errno, "Can't remove drop-in directory %s/%s: %m", where, md);
1681
1682                         if (errno != ENOENT && ret >= 0)
1683                                 ret = -errno;
1684                 } else
1685                         portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, md, NULL);
1686         }
1687
1688         /* Now, also drop any image symlink, for images outside of the sarch path */
1689         SET_FOREACH(item, markers) {
1690                 _cleanup_free_ char *sl = NULL;
1691                 struct stat st;
1692
1693                 r = image_symlink(item, flags, &sl);
1694                 if (r < 0) {
1695                         log_debug_errno(r, "Failed to determine image symlink for '%s', ignoring: %m", item);
1696                         continue;
1697                 }
1698
1699                 if (lstat(sl, &st) < 0) {
1700                         log_debug_errno(errno, "Failed to stat '%s', ignoring: %m", sl);
1701                         continue;
1702                 }
1703
1704                 if (!S_ISLNK(st.st_mode)) {
1705                         log_debug("Image '%s' is not a symlink, ignoring.", sl);
1706                         continue;
1707                 }
1708
1709                 if (unlink(sl) < 0) {
1710                         log_debug_errno(errno, "Can't remove image symlink '%s': %m", sl);
1711
1712                         if (errno != ENOENT && ret >= 0)
1713                                 ret = -errno;
1714                 } else
1715                         portable_changes_add(changes, n_changes, PORTABLE_UNLINK, sl, NULL);
1716         }
1717
1718         /* Try to remove the unit file directory, if we can */
1719         if (rmdir(where) >= 0)
1720                 portable_changes_add(changes, n_changes, PORTABLE_UNLINK, where, NULL);
1721
1722         return ret;
1723
1724 not_found:
1725         extensions = strv_join(extension_image_paths, ", ");
1726         if (!extensions)
1727                 return -ENOMEM;
1728
1729         r = sd_bus_error_setf(error,
1730                               BUS_ERROR_NO_SUCH_UNIT,
1731                               "No unit files associated with '%s%s%s' found attached to the system. Image not attached?",
1732                               name_or_path,
1733                               isempty(extensions) ? "" : "' or any of its extensions '",
1734                               isempty(extensions) ? "" : extensions);
1735         return log_debug_errno(r, "%s", error->message);
1736 }
1737
1738 static int portable_get_state_internal(
1739                 sd_bus *bus,
1740                 const char *name_or_path,
1741                 char **extension_image_paths,
1742                 PortableFlags flags,
1743                 PortableState *ret,
1744                 sd_bus_error *error) {
1745
1746         _cleanup_(lookup_paths_free) LookupPaths paths = {};
1747         bool found_enabled = false, found_running = false;
1748         _cleanup_set_free_ Set *unit_files = NULL;
1749         _cleanup_closedir_ DIR *d = NULL;
1750         const char *where;
1751         int r;
1752
1753         assert(name_or_path);
1754         assert(ret);
1755
1756         r = lookup_paths_init(&paths, RUNTIME_SCOPE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL);
1757         if (r < 0)
1758                 return r;
1759
1760         where = attached_path(&paths, flags);
1761
1762         d = opendir(where);
1763         if (!d) {
1764                 if (errno == ENOENT) {
1765                         /* If the 'attached' directory doesn't exist at all, then we know for sure this image isn't attached. */
1766                         *ret = PORTABLE_DETACHED;
1767                         return 0;
1768                 }
1769
1770                 return log_debug_errno(errno, "Failed to open '%s' directory: %m", where);
1771         }
1772
1773         FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to enumerate '%s' directory: %m", where)) {
1774                 UnitFileState state;
1775
1776                 if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY))
1777                         continue;
1778
1779                 /* Filter out duplicates */
1780                 if (set_contains(unit_files, de->d_name))
1781                         continue;
1782
1783                 if (!IN_SET(de->d_type, DT_LNK, DT_REG))
1784                         continue;
1785
1786                 r = test_chroot_dropin(d, where, de->d_name, name_or_path, extension_image_paths, NULL);
1787                 if (r < 0)
1788                         return r;
1789                 if (r == 0)
1790                         continue;
1791
1792                 r = unit_file_lookup_state(RUNTIME_SCOPE_SYSTEM, &paths, de->d_name, &state);
1793                 if (r < 0)
1794                         return log_debug_errno(r, "Failed to determine unit file state of '%s': %m", de->d_name);
1795                 if (!IN_SET(state, UNIT_FILE_STATIC, UNIT_FILE_DISABLED, UNIT_FILE_LINKED, UNIT_FILE_LINKED_RUNTIME))
1796                         found_enabled = true;
1797
1798                 r = unit_file_is_active(bus, de->d_name, error);
1799                 if (r < 0)
1800                         return r;
1801                 if (r > 0)
1802                         found_running = true;
1803
1804                 r = set_put_strdup(&unit_files, de->d_name);
1805                 if (r < 0)
1806                         return log_debug_errno(r, "Failed to add unit name '%s' to set: %m", de->d_name);
1807         }
1808
1809         *ret = found_running ? (!set_isempty(unit_files) && (flags & PORTABLE_RUNTIME) ? PORTABLE_RUNNING_RUNTIME : PORTABLE_RUNNING) :
1810                 found_enabled ?            (flags & PORTABLE_RUNTIME ? PORTABLE_ENABLED_RUNTIME : PORTABLE_ENABLED) :
1811                 !set_isempty(unit_files) ? (flags & PORTABLE_RUNTIME ? PORTABLE_ATTACHED_RUNTIME : PORTABLE_ATTACHED) : PORTABLE_DETACHED;
1812
1813         return 0;
1814 }
1815
1816 int portable_get_state(
1817                 sd_bus *bus,
1818                 const char *name_or_path,
1819                 char **extension_image_paths,
1820                 PortableFlags flags,
1821                 PortableState *ret,
1822                 sd_bus_error *error) {
1823
1824         PortableState state;
1825         int r;
1826
1827         assert(name_or_path);
1828         assert(ret);
1829
1830         /* We look for matching units twice: once in the regular directories, and once in the runtime directories — but
1831          * the latter only if we didn't find anything in the former. */
1832
1833         r = portable_get_state_internal(bus, name_or_path, extension_image_paths, flags & ~PORTABLE_RUNTIME, &state, error);
1834         if (r < 0)
1835                 return r;
1836
1837         if (state == PORTABLE_DETACHED) {
1838                 r = portable_get_state_internal(bus, name_or_path, extension_image_paths, flags | PORTABLE_RUNTIME, &state, error);
1839                 if (r < 0)
1840                         return r;
1841         }
1842
1843         *ret = state;
1844         return 0;
1845 }
1846
1847 int portable_get_profiles(char ***ret) {
1848         assert(ret);
1849
1850         return conf_files_list_nulstr(ret, NULL, NULL, CONF_FILES_DIRECTORY|CONF_FILES_BASENAME|CONF_FILES_FILTER_MASKED, PORTABLE_PROFILE_DIRS);
1851 }
1852
1853 static const char* const portable_change_type_table[_PORTABLE_CHANGE_TYPE_MAX] = {
1854         [PORTABLE_COPY] = "copy",
1855         [PORTABLE_MKDIR] = "mkdir",
1856         [PORTABLE_SYMLINK] = "symlink",
1857         [PORTABLE_UNLINK] = "unlink",
1858         [PORTABLE_WRITE] = "write",
1859 };
1860
1861 DEFINE_STRING_TABLE_LOOKUP(portable_change_type, int);
1862
1863 static const char* const portable_state_table[_PORTABLE_STATE_MAX] = {
1864         [PORTABLE_DETACHED] = "detached",
1865         [PORTABLE_ATTACHED] = "attached",
1866         [PORTABLE_ATTACHED_RUNTIME] = "attached-runtime",
1867         [PORTABLE_ENABLED] = "enabled",
1868         [PORTABLE_ENABLED_RUNTIME] = "enabled-runtime",
1869         [PORTABLE_RUNNING] = "running",
1870         [PORTABLE_RUNNING_RUNTIME] = "running-runtime",
1871 };
1872
1873 DEFINE_STRING_TABLE_LOOKUP(portable_state, PortableState);