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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
61d0578b | 2 | |
e08f94ac LP |
3 | #include <linux/loop.h> |
4 | ||
61d0578b LP |
5 | #include "bus-common-errors.h" |
6 | #include "bus-error.h" | |
7 | #include "conf-files.h" | |
8 | #include "copy.h" | |
9 | #include "def.h" | |
10 | #include "dirent-util.h" | |
57f1b61b | 11 | #include "discover-image.h" |
61d0578b LP |
12 | #include "dissect-image.h" |
13 | #include "fd-util.h" | |
14 | #include "fileio.h" | |
15 | #include "fs-util.h" | |
5cfa33e0 | 16 | #include "install.h" |
61d0578b LP |
17 | #include "io-util.h" |
18 | #include "locale-util.h" | |
19 | #include "loop-util.h" | |
61d0578b | 20 | #include "mkdir.h" |
d8b4d14d | 21 | #include "nulstr-util.h" |
61d0578b LP |
22 | #include "os-util.h" |
23 | #include "path-lookup.h" | |
24 | #include "portable.h" | |
25 | #include "process-util.h" | |
26 | #include "set.h" | |
27 | #include "signal-util.h" | |
28 | #include "socket-util.h" | |
760877e9 | 29 | #include "sort-util.h" |
61d0578b LP |
30 | #include "string-table.h" |
31 | #include "strv.h" | |
e4de7287 | 32 | #include "tmpfile-util.h" |
61d0578b LP |
33 | #include "user-util.h" |
34 | ||
35 | static const char profile_dirs[] = CONF_PATHS_NULSTR("systemd/portable/profile"); | |
36 | ||
37 | /* Markers used in the first line of our 20-portable.conf unit file drop-in to determine, that a) the unit file was | |
38 | * dropped there by the portable service logic and b) for which image it was dropped there. */ | |
39 | #define PORTABLE_DROPIN_MARKER_BEGIN "# Drop-in created for image '" | |
40 | #define PORTABLE_DROPIN_MARKER_END "', do not edit." | |
41 | ||
42 | static bool prefix_match(const char *unit, const char *prefix) { | |
43 | const char *p; | |
44 | ||
45 | p = startswith(unit, prefix); | |
46 | if (!p) | |
47 | return false; | |
48 | ||
49 | /* Only respect prefixes followed by dash or dot or when there's a complete match */ | |
50 | return IN_SET(*p, '-', '.', '@', 0); | |
51 | } | |
52 | ||
53 | static bool unit_match(const char *unit, char **matches) { | |
54 | const char *dot; | |
55 | char **i; | |
56 | ||
57 | dot = strrchr(unit, '.'); | |
58 | if (!dot) | |
59 | return false; | |
60 | ||
61 | if (!STR_IN_SET(dot, ".service", ".socket", ".target", ".timer", ".path")) | |
62 | return false; | |
63 | ||
64 | /* Empty match expression means: everything */ | |
65 | if (strv_isempty(matches)) | |
66 | return true; | |
67 | ||
68 | /* Otherwise, at least one needs to match */ | |
69 | STRV_FOREACH(i, matches) | |
70 | if (prefix_match(unit, *i)) | |
71 | return true; | |
72 | ||
73 | return false; | |
74 | } | |
75 | ||
76 | static PortableMetadata *portable_metadata_new(const char *name, int fd) { | |
77 | PortableMetadata *m; | |
78 | ||
79 | m = malloc0(offsetof(PortableMetadata, name) + strlen(name) + 1); | |
80 | if (!m) | |
81 | return NULL; | |
82 | ||
83 | strcpy(m->name, name); | |
84 | m->fd = fd; | |
85 | ||
86 | return m; | |
87 | } | |
88 | ||
89 | PortableMetadata *portable_metadata_unref(PortableMetadata *i) { | |
90 | if (!i) | |
91 | return NULL; | |
92 | ||
93 | safe_close(i->fd); | |
94 | free(i->source); | |
95 | ||
96 | return mfree(i); | |
97 | } | |
98 | ||
61d0578b LP |
99 | static int compare_metadata(PortableMetadata *const *x, PortableMetadata *const *y) { |
100 | return strcmp((*x)->name, (*y)->name); | |
101 | } | |
102 | ||
103 | int portable_metadata_hashmap_to_sorted_array(Hashmap *unit_files, PortableMetadata ***ret) { | |
104 | ||
105 | _cleanup_free_ PortableMetadata **sorted = NULL; | |
61d0578b LP |
106 | PortableMetadata *item; |
107 | size_t k = 0; | |
108 | ||
109 | sorted = new(PortableMetadata*, hashmap_size(unit_files)); | |
110 | if (!sorted) | |
111 | return -ENOMEM; | |
112 | ||
90e74a66 | 113 | HASHMAP_FOREACH(item, unit_files) |
61d0578b LP |
114 | sorted[k++] = item; |
115 | ||
116 | assert(k == hashmap_size(unit_files)); | |
117 | ||
118 | typesafe_qsort(sorted, k, compare_metadata); | |
119 | ||
120 | *ret = TAKE_PTR(sorted); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int send_item( | |
125 | int socket_fd, | |
126 | const char *name, | |
127 | int fd) { | |
128 | ||
fb29cdbe | 129 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(int))) control = {}; |
61d0578b LP |
130 | struct iovec iovec; |
131 | struct msghdr mh = { | |
132 | .msg_control = &control, | |
133 | .msg_controllen = sizeof(control), | |
134 | .msg_iov = &iovec, | |
135 | .msg_iovlen = 1, | |
136 | }; | |
137 | struct cmsghdr *cmsg; | |
138 | _cleanup_close_ int data_fd = -1; | |
139 | ||
140 | assert(socket_fd >= 0); | |
141 | assert(name); | |
142 | assert(fd >= 0); | |
143 | ||
144 | data_fd = fd_duplicate_data_fd(fd); | |
145 | if (data_fd < 0) | |
146 | return data_fd; | |
147 | ||
148 | cmsg = CMSG_FIRSTHDR(&mh); | |
149 | cmsg->cmsg_level = SOL_SOCKET; | |
150 | cmsg->cmsg_type = SCM_RIGHTS; | |
151 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
152 | memcpy(CMSG_DATA(cmsg), &data_fd, sizeof(int)); | |
153 | ||
61d0578b LP |
154 | iovec = IOVEC_MAKE_STRING(name); |
155 | ||
156 | if (sendmsg(socket_fd, &mh, MSG_NOSIGNAL) < 0) | |
157 | return -errno; | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static int recv_item( | |
163 | int socket_fd, | |
164 | char **ret_name, | |
165 | int *ret_fd) { | |
166 | ||
fb29cdbe | 167 | CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(int))) control; |
61d0578b LP |
168 | char buffer[PATH_MAX+2]; |
169 | struct iovec iov = IOVEC_INIT(buffer, sizeof(buffer)-1); | |
170 | struct msghdr mh = { | |
171 | .msg_control = &control, | |
172 | .msg_controllen = sizeof(control), | |
173 | .msg_iov = &iov, | |
174 | .msg_iovlen = 1, | |
175 | }; | |
176 | struct cmsghdr *cmsg; | |
177 | _cleanup_close_ int found_fd = -1; | |
178 | char *copy; | |
179 | ssize_t n; | |
180 | ||
181 | assert(socket_fd >= 0); | |
182 | assert(ret_name); | |
183 | assert(ret_fd); | |
184 | ||
3691bcf3 | 185 | n = recvmsg_safe(socket_fd, &mh, MSG_CMSG_CLOEXEC); |
61d0578b | 186 | if (n < 0) |
3691bcf3 | 187 | return (int) n; |
61d0578b LP |
188 | |
189 | CMSG_FOREACH(cmsg, &mh) { | |
190 | if (cmsg->cmsg_level == SOL_SOCKET && | |
191 | cmsg->cmsg_type == SCM_RIGHTS) { | |
192 | ||
193 | if (cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
194 | assert(found_fd < 0); | |
195 | found_fd = *(int*) CMSG_DATA(cmsg); | |
196 | break; | |
197 | } | |
198 | ||
199 | cmsg_close_all(&mh); | |
200 | return -EIO; | |
201 | } | |
202 | } | |
203 | ||
204 | buffer[n] = 0; | |
205 | ||
206 | copy = strdup(buffer); | |
207 | if (!copy) | |
208 | return -ENOMEM; | |
209 | ||
210 | *ret_name = copy; | |
211 | *ret_fd = TAKE_FD(found_fd); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
67818055 YW |
216 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(portable_metadata_hash_ops, char, string_hash_func, string_compare_func, |
217 | PortableMetadata, portable_metadata_unref); | |
218 | ||
61d0578b LP |
219 | static int extract_now( |
220 | const char *where, | |
221 | char **matches, | |
222 | int socket_fd, | |
223 | PortableMetadata **ret_os_release, | |
224 | Hashmap **ret_unit_files) { | |
225 | ||
67818055 | 226 | _cleanup_hashmap_free_ Hashmap *unit_files = NULL; |
61d0578b LP |
227 | _cleanup_(portable_metadata_unrefp) PortableMetadata *os_release = NULL; |
228 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; | |
229 | _cleanup_close_ int os_release_fd = -1; | |
230 | _cleanup_free_ char *os_release_path = NULL; | |
231 | char **i; | |
232 | int r; | |
233 | ||
234 | /* Extracts the metadata from a directory tree 'where'. Extracts two kinds of information: the /etc/os-release | |
235 | * data, and all unit files matching the specified expression. Note that this function is called in two very | |
236 | * different but also similar contexts. When the tool gets invoked on a directory tree, we'll process it | |
237 | * directly, and in-process, and thus can return the requested data directly, via 'ret_os_release' and | |
238 | * 'ret_unit_files'. However, if the tool is invoked on a raw disk image — which needs to be mounted first — we | |
239 | * are invoked in a child process with private mounts and then need to send the collected data to our | |
240 | * parent. To handle both cases in one call this function also gets a 'socket_fd' parameter, which when >= 0 is | |
241 | * used to send the data to the parent. */ | |
242 | ||
243 | assert(where); | |
244 | ||
245 | /* First, find /etc/os-release and send it upstream (or just save it). */ | |
246 | r = open_os_release(where, &os_release_path, &os_release_fd); | |
247 | if (r < 0) | |
248 | log_debug_errno(r, "Couldn't acquire os-release file, ignoring: %m"); | |
249 | else { | |
250 | if (socket_fd >= 0) { | |
251 | r = send_item(socket_fd, "/etc/os-release", os_release_fd); | |
252 | if (r < 0) | |
253 | return log_debug_errno(r, "Failed to send os-release file: %m"); | |
254 | } | |
255 | ||
256 | if (ret_os_release) { | |
257 | os_release = portable_metadata_new("/etc/os-release", os_release_fd); | |
258 | if (!os_release) | |
259 | return -ENOMEM; | |
260 | ||
261 | os_release_fd = -1; | |
262 | os_release->source = TAKE_PTR(os_release_path); | |
263 | } | |
264 | } | |
265 | ||
266 | /* Then, send unit file data to the parent (or/and add it to the hashmap). For that we use our usual unit | |
267 | * discovery logic. Note that we force looking inside of /lib/systemd/system/ for units too, as we mightbe | |
268 | * compiled for a split-usr system but the image might be a legacy-usr one. */ | |
269 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, where); | |
270 | if (r < 0) | |
271 | return log_debug_errno(r, "Failed to acquire lookup paths: %m"); | |
272 | ||
67818055 | 273 | unit_files = hashmap_new(&portable_metadata_hash_ops); |
61d0578b LP |
274 | if (!unit_files) |
275 | return -ENOMEM; | |
276 | ||
277 | STRV_FOREACH(i, paths.search_path) { | |
278 | _cleanup_free_ char *resolved = NULL; | |
279 | _cleanup_closedir_ DIR *d = NULL; | |
280 | struct dirent *de; | |
281 | ||
282 | r = chase_symlinks_and_opendir(*i, where, 0, &resolved, &d); | |
283 | if (r < 0) { | |
284 | log_debug_errno(r, "Failed to open unit path '%s', ignoring: %m", *i); | |
285 | continue; | |
286 | } | |
287 | ||
288 | FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to read directory: %m")) { | |
289 | _cleanup_(portable_metadata_unrefp) PortableMetadata *m = NULL; | |
290 | _cleanup_close_ int fd = -1; | |
291 | ||
292 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
293 | continue; | |
294 | ||
295 | if (!unit_match(de->d_name, matches)) | |
296 | continue; | |
297 | ||
298 | /* Filter out duplicates */ | |
299 | if (hashmap_get(unit_files, de->d_name)) | |
300 | continue; | |
301 | ||
302 | dirent_ensure_type(d, de); | |
303 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
304 | continue; | |
305 | ||
306 | fd = openat(dirfd(d), de->d_name, O_CLOEXEC|O_RDONLY); | |
307 | if (fd < 0) { | |
308 | log_debug_errno(errno, "Failed to open unit file '%s', ignoring: %m", de->d_name); | |
309 | continue; | |
310 | } | |
311 | ||
312 | if (socket_fd >= 0) { | |
313 | r = send_item(socket_fd, de->d_name, fd); | |
314 | if (r < 0) | |
315 | return log_debug_errno(r, "Failed to send unit metadata to parent: %m"); | |
316 | } | |
317 | ||
318 | m = portable_metadata_new(de->d_name, fd); | |
319 | if (!m) | |
320 | return -ENOMEM; | |
321 | fd = -1; | |
322 | ||
657ee2d8 | 323 | m->source = path_join(resolved, de->d_name); |
61d0578b LP |
324 | if (!m->source) |
325 | return -ENOMEM; | |
326 | ||
327 | r = hashmap_put(unit_files, m->name, m); | |
328 | if (r < 0) | |
329 | return log_debug_errno(r, "Failed to add unit to hashmap: %m"); | |
330 | m = NULL; | |
331 | } | |
332 | } | |
333 | ||
334 | if (ret_os_release) | |
335 | *ret_os_release = TAKE_PTR(os_release); | |
336 | if (ret_unit_files) | |
337 | *ret_unit_files = TAKE_PTR(unit_files); | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static int portable_extract_by_path( | |
343 | const char *path, | |
344 | char **matches, | |
345 | PortableMetadata **ret_os_release, | |
346 | Hashmap **ret_unit_files, | |
347 | sd_bus_error *error) { | |
348 | ||
67818055 | 349 | _cleanup_hashmap_free_ Hashmap *unit_files = NULL; |
61d0578b LP |
350 | _cleanup_(portable_metadata_unrefp) PortableMetadata* os_release = NULL; |
351 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; | |
352 | int r; | |
353 | ||
354 | assert(path); | |
355 | ||
e08f94ac | 356 | r = loop_device_make_by_path(path, O_RDONLY, LO_FLAGS_PARTSCAN, &d); |
61d0578b LP |
357 | if (r == -EISDIR) { |
358 | /* We can't turn this into a loop-back block device, and this returns EISDIR? Then this is a directory | |
359 | * tree and not a raw device. It's easy then. */ | |
360 | ||
361 | r = extract_now(path, matches, -1, &os_release, &unit_files); | |
362 | if (r < 0) | |
363 | return r; | |
364 | ||
365 | } else if (r < 0) | |
366 | return log_debug_errno(r, "Failed to set up loopback device: %m"); | |
367 | else { | |
368 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
369 | _cleanup_(rmdir_and_freep) char *tmpdir = NULL; | |
370 | _cleanup_(close_pairp) int seq[2] = { -1, -1 }; | |
371 | _cleanup_(sigkill_waitp) pid_t child = 0; | |
372 | ||
373 | /* We now have a loopback block device, let's fork off a child in its own mount namespace, mount it | |
374 | * there, and extract the metadata we need. The metadata is sent from the child back to us. */ | |
375 | ||
376 | BLOCK_SIGNALS(SIGCHLD); | |
377 | ||
378 | r = mkdtemp_malloc("/tmp/inspect-XXXXXX", &tmpdir); | |
379 | if (r < 0) | |
380 | return log_debug_errno(r, "Failed to create temporary directory: %m"); | |
381 | ||
89e62e0b | 382 | r = dissect_image(d->fd, NULL, NULL, DISSECT_IMAGE_READ_ONLY|DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_DISCARD_ON_LOOP|DISSECT_IMAGE_RELAX_VAR_CHECK, &m); |
61d0578b LP |
383 | if (r == -ENOPKG) |
384 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Couldn't identify a suitable partition table or file system in '%s'.", path); | |
385 | else if (r == -EADDRNOTAVAIL) | |
386 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "No root partition for specified root hash found in '%s'.", path); | |
387 | else if (r == -ENOTUNIQ) | |
388 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Multiple suitable root partitions found in image '%s'.", path); | |
389 | else if (r == -ENXIO) | |
390 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "No suitable root partition found in image '%s'.", path); | |
391 | else if (r == -EPROTONOSUPPORT) | |
392 | 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); | |
393 | if (r < 0) | |
394 | return r; | |
395 | ||
396 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, seq) < 0) | |
397 | return log_debug_errno(errno, "Failed to allocated SOCK_SEQPACKET socket: %m"); | |
398 | ||
399 | r = safe_fork("(sd-dissect)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE|FORK_LOG, &child); | |
400 | if (r < 0) | |
401 | return r; | |
402 | if (r == 0) { | |
403 | seq[0] = safe_close(seq[0]); | |
404 | ||
405 | r = dissected_image_mount(m, tmpdir, UID_INVALID, DISSECT_IMAGE_READ_ONLY|DISSECT_IMAGE_VALIDATE_OS); | |
406 | if (r < 0) { | |
407 | log_debug_errno(r, "Failed to mount dissected image: %m"); | |
408 | goto child_finish; | |
409 | } | |
410 | ||
411 | r = extract_now(tmpdir, matches, seq[1], NULL, NULL); | |
412 | ||
413 | child_finish: | |
414 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); | |
415 | } | |
416 | ||
417 | seq[1] = safe_close(seq[1]); | |
418 | ||
67818055 | 419 | unit_files = hashmap_new(&portable_metadata_hash_ops); |
61d0578b LP |
420 | if (!unit_files) |
421 | return -ENOMEM; | |
422 | ||
423 | for (;;) { | |
424 | _cleanup_(portable_metadata_unrefp) PortableMetadata *add = NULL; | |
425 | _cleanup_free_ char *name = NULL; | |
426 | _cleanup_close_ int fd = -1; | |
427 | ||
428 | r = recv_item(seq[0], &name, &fd); | |
429 | if (r < 0) | |
430 | return log_debug_errno(r, "Failed to receive item: %m"); | |
431 | ||
5238e957 | 432 | /* We can't really distinguish a zero-length datagram without any fds from EOF (both are signalled the |
61d0578b LP |
433 | * same way by recvmsg()). Hence, accept either as end notification. */ |
434 | if (isempty(name) && fd < 0) | |
435 | break; | |
436 | ||
d7a0f1f4 FS |
437 | if (isempty(name) || fd < 0) |
438 | return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), | |
439 | "Invalid item sent from child."); | |
61d0578b LP |
440 | |
441 | add = portable_metadata_new(name, fd); | |
442 | if (!add) | |
443 | return -ENOMEM; | |
444 | fd = -1; | |
445 | ||
446 | /* Note that we do not initialize 'add->source' here, as the source path is not usable here as | |
447 | * it refers to a path only valid in the short-living namespaced child process we forked | |
448 | * here. */ | |
449 | ||
450 | if (PORTABLE_METADATA_IS_UNIT(add)) { | |
451 | r = hashmap_put(unit_files, add->name, add); | |
452 | if (r < 0) | |
453 | return log_debug_errno(r, "Failed to add item to unit file list: %m"); | |
454 | ||
455 | add = NULL; | |
456 | ||
457 | } else if (PORTABLE_METADATA_IS_OS_RELEASE(add)) { | |
458 | ||
459 | assert(!os_release); | |
460 | os_release = TAKE_PTR(add); | |
461 | } else | |
462 | assert_not_reached("Unexpected metadata item from child."); | |
463 | } | |
464 | ||
465 | r = wait_for_terminate_and_check("(sd-dissect)", child, 0); | |
466 | if (r < 0) | |
467 | return r; | |
468 | child = 0; | |
469 | } | |
470 | ||
471 | if (!os_release) | |
472 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image '%s' lacks os-release data, refusing.", path); | |
473 | ||
474 | if (hashmap_isempty(unit_files)) | |
475 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Couldn't find any matching unit files in image '%s', refusing.", path); | |
476 | ||
477 | if (ret_unit_files) | |
478 | *ret_unit_files = TAKE_PTR(unit_files); | |
479 | ||
480 | if (ret_os_release) | |
481 | *ret_os_release = TAKE_PTR(os_release); | |
482 | ||
483 | return 0; | |
484 | } | |
485 | ||
486 | int portable_extract( | |
487 | const char *name_or_path, | |
488 | char **matches, | |
489 | PortableMetadata **ret_os_release, | |
490 | Hashmap **ret_unit_files, | |
491 | sd_bus_error *error) { | |
492 | ||
493 | _cleanup_(image_unrefp) Image *image = NULL; | |
494 | int r; | |
495 | ||
496 | assert(name_or_path); | |
497 | ||
d577d4a4 | 498 | r = image_find_harder(IMAGE_PORTABLE, name_or_path, NULL, &image); |
61d0578b LP |
499 | if (r < 0) |
500 | return r; | |
501 | ||
502 | return portable_extract_by_path(image->path, matches, ret_os_release, ret_unit_files, error); | |
503 | } | |
504 | ||
505 | static int unit_file_is_active( | |
506 | sd_bus *bus, | |
507 | const char *name, | |
508 | sd_bus_error *error) { | |
509 | ||
510 | static const char *const active_states[] = { | |
511 | "activating", | |
512 | "active", | |
513 | "reloading", | |
514 | "deactivating", | |
515 | NULL, | |
516 | }; | |
517 | int r; | |
518 | ||
519 | if (!bus) | |
520 | return false; | |
521 | ||
522 | /* If we are looking at a plain or instance things are easy, we can just query the state */ | |
523 | if (unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) { | |
524 | _cleanup_free_ char *path = NULL, *buf = NULL; | |
525 | ||
526 | path = unit_dbus_path_from_name(name); | |
527 | if (!path) | |
528 | return -ENOMEM; | |
529 | ||
530 | r = sd_bus_get_property_string( | |
531 | bus, | |
532 | "org.freedesktop.systemd1", | |
533 | path, | |
534 | "org.freedesktop.systemd1.Unit", | |
535 | "ActiveState", | |
536 | error, | |
537 | &buf); | |
538 | if (r < 0) | |
539 | return log_debug_errno(r, "Failed to retrieve unit state: %s", bus_error_message(error, r)); | |
540 | ||
541 | return strv_contains((char**) active_states, buf); | |
542 | } | |
543 | ||
544 | /* Otherwise we need to enumerate. But let's build the most restricted query we can */ | |
545 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { | |
546 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; | |
547 | const char *at, *prefix, *joined; | |
548 | ||
549 | r = sd_bus_message_new_method_call( | |
550 | bus, | |
551 | &m, | |
552 | "org.freedesktop.systemd1", | |
553 | "/org/freedesktop/systemd1", | |
554 | "org.freedesktop.systemd1.Manager", | |
555 | "ListUnitsByPatterns"); | |
556 | if (r < 0) | |
557 | return r; | |
558 | ||
559 | r = sd_bus_message_append_strv(m, (char**) active_states); | |
560 | if (r < 0) | |
561 | return r; | |
562 | ||
563 | at = strchr(name, '@'); | |
564 | assert(at); | |
565 | ||
566 | prefix = strndupa(name, at + 1 - name); | |
567 | joined = strjoina(prefix, "*", at + 1); | |
568 | ||
569 | r = sd_bus_message_append_strv(m, STRV_MAKE(joined)); | |
570 | if (r < 0) | |
571 | return r; | |
572 | ||
573 | r = sd_bus_call(bus, m, 0, error, &reply); | |
574 | if (r < 0) | |
575 | return log_debug_errno(r, "Failed to list units: %s", bus_error_message(error, r)); | |
576 | ||
577 | r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssssouso)"); | |
578 | if (r < 0) | |
579 | return r; | |
580 | ||
581 | r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_STRUCT, "ssssssouso"); | |
582 | if (r < 0) | |
583 | return r; | |
584 | ||
585 | return r > 0; | |
586 | } | |
587 | ||
588 | return -EINVAL; | |
589 | } | |
590 | ||
591 | static int portable_changes_add( | |
592 | PortableChange **changes, | |
593 | size_t *n_changes, | |
594 | PortableChangeType type, | |
595 | const char *path, | |
596 | const char *source) { | |
597 | ||
598 | _cleanup_free_ char *p = NULL, *s = NULL; | |
599 | PortableChange *c; | |
600 | ||
601 | assert(path); | |
602 | assert(!changes == !n_changes); | |
603 | ||
604 | if (!changes) | |
605 | return 0; | |
606 | ||
607 | c = reallocarray(*changes, *n_changes + 1, sizeof(PortableChange)); | |
608 | if (!c) | |
609 | return -ENOMEM; | |
610 | *changes = c; | |
611 | ||
612 | p = strdup(path); | |
613 | if (!p) | |
614 | return -ENOMEM; | |
615 | ||
858d36c1 | 616 | path_simplify(p, false); |
61d0578b LP |
617 | |
618 | if (source) { | |
619 | s = strdup(source); | |
620 | if (!s) | |
621 | return -ENOMEM; | |
622 | ||
858d36c1 | 623 | path_simplify(s, false); |
61d0578b LP |
624 | } |
625 | ||
626 | c[(*n_changes)++] = (PortableChange) { | |
627 | .type = type, | |
628 | .path = TAKE_PTR(p), | |
629 | .source = TAKE_PTR(s), | |
630 | }; | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
635 | static int portable_changes_add_with_prefix( | |
636 | PortableChange **changes, | |
637 | size_t *n_changes, | |
638 | PortableChangeType type, | |
639 | const char *prefix, | |
640 | const char *path, | |
641 | const char *source) { | |
642 | ||
643 | assert(path); | |
644 | assert(!changes == !n_changes); | |
645 | ||
646 | if (!changes) | |
647 | return 0; | |
648 | ||
649 | if (prefix) { | |
270384b2 | 650 | path = prefix_roota(prefix, path); |
61d0578b LP |
651 | |
652 | if (source) | |
270384b2 | 653 | source = prefix_roota(prefix, source); |
61d0578b LP |
654 | } |
655 | ||
656 | return portable_changes_add(changes, n_changes, type, path, source); | |
657 | } | |
658 | ||
659 | void portable_changes_free(PortableChange *changes, size_t n_changes) { | |
660 | size_t i; | |
661 | ||
662 | assert(changes || n_changes == 0); | |
663 | ||
664 | for (i = 0; i < n_changes; i++) { | |
665 | free(changes[i].path); | |
666 | free(changes[i].source); | |
667 | } | |
668 | ||
669 | free(changes); | |
670 | } | |
671 | ||
672 | static int install_chroot_dropin( | |
673 | const char *image_path, | |
674 | ImageType type, | |
675 | const PortableMetadata *m, | |
676 | const char *dropin_dir, | |
677 | char **ret_dropin, | |
678 | PortableChange **changes, | |
679 | size_t *n_changes) { | |
680 | ||
681 | _cleanup_free_ char *text = NULL, *dropin = NULL; | |
682 | int r; | |
683 | ||
684 | assert(image_path); | |
685 | assert(m); | |
686 | assert(dropin_dir); | |
687 | ||
657ee2d8 | 688 | dropin = path_join(dropin_dir, "20-portable.conf"); |
61d0578b LP |
689 | if (!dropin) |
690 | return -ENOMEM; | |
691 | ||
692 | text = strjoin(PORTABLE_DROPIN_MARKER_BEGIN, image_path, PORTABLE_DROPIN_MARKER_END "\n"); | |
693 | if (!text) | |
694 | return -ENOMEM; | |
695 | ||
62b0ee9e LB |
696 | if (endswith(m->name, ".service")) { |
697 | const char *os_release_source; | |
698 | ||
699 | if (access("/etc/os-release", F_OK) < 0) { | |
700 | if (errno != ENOENT) | |
701 | return log_debug_errno(errno, "Failed to check if /etc/os-release exists: %m"); | |
702 | ||
703 | os_release_source = "/usr/lib/os-release"; | |
704 | } else | |
705 | os_release_source = "/etc/os-release"; | |
706 | ||
61d0578b LP |
707 | if (!strextend(&text, |
708 | "\n" | |
709 | "[Service]\n", | |
710 | IN_SET(type, IMAGE_DIRECTORY, IMAGE_SUBVOLUME) ? "RootDirectory=" : "RootImage=", image_path, "\n" | |
711 | "Environment=PORTABLE=", basename(image_path), "\n" | |
62b0ee9e | 712 | "BindReadOnlyPaths=", os_release_source, ":/run/host/os-release\n" |
c2bc710b | 713 | "LogExtraFields=PORTABLE=", basename(image_path), "\n")) |
61d0578b | 714 | return -ENOMEM; |
62b0ee9e | 715 | } |
61d0578b LP |
716 | |
717 | r = write_string_file(dropin, text, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC); | |
718 | if (r < 0) | |
719 | return log_debug_errno(r, "Failed to write '%s': %m", dropin); | |
720 | ||
721 | (void) portable_changes_add(changes, n_changes, PORTABLE_WRITE, dropin, NULL); | |
722 | ||
723 | if (ret_dropin) | |
724 | *ret_dropin = TAKE_PTR(dropin); | |
725 | ||
726 | return 0; | |
727 | } | |
728 | ||
729 | static int find_profile(const char *name, const char *unit, char **ret) { | |
730 | const char *p, *dot; | |
731 | ||
732 | assert(name); | |
733 | assert(ret); | |
734 | ||
735 | assert_se(dot = strrchr(unit, '.')); | |
736 | ||
737 | NULSTR_FOREACH(p, profile_dirs) { | |
738 | _cleanup_free_ char *joined; | |
739 | ||
740 | joined = strjoin(p, "/", name, "/", dot + 1, ".conf"); | |
741 | if (!joined) | |
742 | return -ENOMEM; | |
743 | ||
744 | if (laccess(joined, F_OK) >= 0) { | |
745 | *ret = TAKE_PTR(joined); | |
746 | return 0; | |
747 | } | |
748 | ||
749 | if (errno != ENOENT) | |
750 | return -errno; | |
751 | } | |
752 | ||
753 | return -ENOENT; | |
754 | } | |
755 | ||
756 | static int install_profile_dropin( | |
757 | const char *image_path, | |
758 | const PortableMetadata *m, | |
759 | const char *dropin_dir, | |
760 | const char *profile, | |
761 | PortableFlags flags, | |
762 | char **ret_dropin, | |
763 | PortableChange **changes, | |
764 | size_t *n_changes) { | |
765 | ||
766 | _cleanup_free_ char *dropin = NULL, *from = NULL; | |
767 | int r; | |
768 | ||
769 | assert(image_path); | |
770 | assert(m); | |
771 | assert(dropin_dir); | |
772 | ||
773 | if (!profile) | |
774 | return 0; | |
775 | ||
776 | r = find_profile(profile, m->name, &from); | |
777 | if (r < 0) { | |
99c89da0 | 778 | if (r != -ENOENT) |
61d0578b LP |
779 | return log_debug_errno(errno, "Profile '%s' is not accessible: %m", profile); |
780 | ||
781 | log_debug_errno(errno, "Skipping link to profile '%s', as it does not exist: %m", profile); | |
782 | return 0; | |
783 | } | |
784 | ||
657ee2d8 | 785 | dropin = path_join(dropin_dir, "10-profile.conf"); |
61d0578b LP |
786 | if (!dropin) |
787 | return -ENOMEM; | |
788 | ||
789 | if (flags & PORTABLE_PREFER_COPY) { | |
790 | ||
8a016c74 | 791 | r = copy_file_atomic(from, dropin, 0644, 0, 0, COPY_REFLINK); |
61d0578b | 792 | if (r < 0) |
9a6f746f | 793 | return log_debug_errno(r, "Failed to copy %s %s %s: %m", from, special_glyph(SPECIAL_GLYPH_ARROW), dropin); |
61d0578b LP |
794 | |
795 | (void) portable_changes_add(changes, n_changes, PORTABLE_COPY, dropin, from); | |
796 | ||
797 | } else { | |
798 | ||
799 | if (symlink(from, dropin) < 0) | |
9a6f746f | 800 | return log_debug_errno(errno, "Failed to link %s %s %s: %m", from, special_glyph(SPECIAL_GLYPH_ARROW), dropin); |
61d0578b LP |
801 | |
802 | (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, dropin, from); | |
803 | } | |
804 | ||
805 | if (ret_dropin) | |
806 | *ret_dropin = TAKE_PTR(dropin); | |
807 | ||
808 | return 0; | |
809 | } | |
810 | ||
40a7b232 | 811 | static const char *attached_path(const LookupPaths *paths, PortableFlags flags) { |
61d0578b LP |
812 | const char *where; |
813 | ||
814 | assert(paths); | |
815 | ||
816 | if (flags & PORTABLE_RUNTIME) | |
40a7b232 | 817 | where = paths->runtime_attached; |
61d0578b | 818 | else |
40a7b232 | 819 | where = paths->persistent_attached; |
61d0578b LP |
820 | |
821 | assert(where); | |
822 | return where; | |
823 | } | |
824 | ||
825 | static int attach_unit_file( | |
826 | const LookupPaths *paths, | |
827 | const char *image_path, | |
828 | ImageType type, | |
829 | const PortableMetadata *m, | |
830 | const char *profile, | |
831 | PortableFlags flags, | |
832 | PortableChange **changes, | |
833 | size_t *n_changes) { | |
834 | ||
835 | _cleanup_(unlink_and_freep) char *chroot_dropin = NULL, *profile_dropin = NULL; | |
836 | _cleanup_(rmdir_and_freep) char *dropin_dir = NULL; | |
837 | const char *where, *path; | |
838 | int r; | |
839 | ||
840 | assert(paths); | |
841 | assert(image_path); | |
842 | assert(m); | |
843 | assert(PORTABLE_METADATA_IS_UNIT(m)); | |
844 | ||
40a7b232 | 845 | where = attached_path(paths, flags); |
61d0578b | 846 | |
d09d85a2 LP |
847 | (void) mkdir_parents(where, 0755); |
848 | if (mkdir(where, 0755) < 0) { | |
849 | if (errno != EEXIST) | |
850 | return -errno; | |
851 | } else | |
852 | (void) portable_changes_add(changes, n_changes, PORTABLE_MKDIR, where, NULL); | |
853 | ||
270384b2 | 854 | path = prefix_roota(where, m->name); |
61d0578b LP |
855 | dropin_dir = strjoin(path, ".d"); |
856 | if (!dropin_dir) | |
857 | return -ENOMEM; | |
858 | ||
d09d85a2 LP |
859 | if (mkdir(dropin_dir, 0755) < 0) { |
860 | if (errno != EEXIST) | |
861 | return -errno; | |
862 | } else | |
863 | (void) portable_changes_add(changes, n_changes, PORTABLE_MKDIR, dropin_dir, NULL); | |
61d0578b LP |
864 | |
865 | /* We install the drop-ins first, and the actual unit file last to achieve somewhat atomic behaviour if PID 1 | |
866 | * is reloaded while we are creating things here: as long as only the drop-ins exist the unit doesn't exist at | |
867 | * all for PID 1. */ | |
868 | ||
869 | r = install_chroot_dropin(image_path, type, m, dropin_dir, &chroot_dropin, changes, n_changes); | |
870 | if (r < 0) | |
871 | return r; | |
872 | ||
873 | r = install_profile_dropin(image_path, m, dropin_dir, profile, flags, &profile_dropin, changes, n_changes); | |
874 | if (r < 0) | |
875 | return r; | |
876 | ||
877 | if ((flags & PORTABLE_PREFER_SYMLINK) && m->source) { | |
878 | ||
879 | if (symlink(m->source, path) < 0) | |
880 | return log_debug_errno(errno, "Failed to symlink unit file '%s': %m", path); | |
881 | ||
882 | (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, path, m->source); | |
883 | ||
884 | } else { | |
885 | _cleanup_(unlink_and_freep) char *tmp = NULL; | |
886 | _cleanup_close_ int fd = -1; | |
887 | ||
6d88513e | 888 | fd = open_tmpfile_linkable(path, O_WRONLY|O_CLOEXEC, &tmp); |
61d0578b LP |
889 | if (fd < 0) |
890 | return log_debug_errno(fd, "Failed to create unit file '%s': %m", path); | |
891 | ||
892 | r = copy_bytes(m->fd, fd, UINT64_MAX, COPY_REFLINK); | |
893 | if (r < 0) | |
894 | return log_debug_errno(r, "Failed to copy unit file '%s': %m", path); | |
895 | ||
896 | if (fchmod(fd, 0644) < 0) | |
897 | return log_debug_errno(errno, "Failed to change unit file access mode for '%s': %m", path); | |
898 | ||
899 | r = link_tmpfile(fd, tmp, path); | |
900 | if (r < 0) | |
901 | return log_debug_errno(r, "Failed to install unit file '%s': %m", path); | |
902 | ||
903 | tmp = mfree(tmp); | |
904 | ||
905 | (void) portable_changes_add(changes, n_changes, PORTABLE_COPY, path, m->source); | |
906 | } | |
907 | ||
908 | /* All is established now, now let's disable any rollbacks */ | |
909 | chroot_dropin = mfree(chroot_dropin); | |
910 | profile_dropin = mfree(profile_dropin); | |
911 | dropin_dir = mfree(dropin_dir); | |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
916 | static int image_symlink( | |
917 | const char *image_path, | |
918 | PortableFlags flags, | |
919 | char **ret) { | |
920 | ||
921 | const char *fn, *where; | |
922 | char *joined = NULL; | |
923 | ||
924 | assert(image_path); | |
925 | assert(ret); | |
926 | ||
927 | fn = last_path_component(image_path); | |
928 | ||
929 | if (flags & PORTABLE_RUNTIME) | |
930 | where = "/run/portables/"; | |
931 | else | |
932 | where = "/etc/portables/"; | |
933 | ||
934 | joined = strjoin(where, fn); | |
935 | if (!joined) | |
936 | return -ENOMEM; | |
937 | ||
938 | *ret = joined; | |
939 | return 0; | |
940 | } | |
941 | ||
942 | static int install_image_symlink( | |
943 | const char *image_path, | |
944 | PortableFlags flags, | |
945 | PortableChange **changes, | |
946 | size_t *n_changes) { | |
947 | ||
948 | _cleanup_free_ char *sl = NULL; | |
949 | int r; | |
950 | ||
951 | assert(image_path); | |
952 | ||
953 | /* If the image is outside of the image search also link it into it, so that it can be found with short image | |
954 | * names and is listed among the images. */ | |
955 | ||
d577d4a4 | 956 | if (image_in_search_path(IMAGE_PORTABLE, NULL, image_path)) |
61d0578b LP |
957 | return 0; |
958 | ||
959 | r = image_symlink(image_path, flags, &sl); | |
960 | if (r < 0) | |
961 | return log_debug_errno(r, "Failed to generate image symlink path: %m"); | |
962 | ||
963 | (void) mkdir_parents(sl, 0755); | |
964 | ||
965 | if (symlink(image_path, sl) < 0) | |
9a6f746f | 966 | return log_debug_errno(errno, "Failed to link %s %s %s: %m", image_path, special_glyph(SPECIAL_GLYPH_ARROW), sl); |
61d0578b LP |
967 | |
968 | (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, sl, image_path); | |
969 | return 0; | |
970 | } | |
971 | ||
972 | int portable_attach( | |
973 | sd_bus *bus, | |
974 | const char *name_or_path, | |
975 | char **matches, | |
976 | const char *profile, | |
977 | PortableFlags flags, | |
978 | PortableChange **changes, | |
979 | size_t *n_changes, | |
980 | sd_bus_error *error) { | |
981 | ||
67818055 | 982 | _cleanup_hashmap_free_ Hashmap *unit_files = NULL; |
61d0578b LP |
983 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; |
984 | _cleanup_(image_unrefp) Image *image = NULL; | |
985 | PortableMetadata *item; | |
61d0578b LP |
986 | int r; |
987 | ||
988 | assert(name_or_path); | |
989 | ||
d577d4a4 | 990 | r = image_find_harder(IMAGE_PORTABLE, name_or_path, NULL, &image); |
61d0578b LP |
991 | if (r < 0) |
992 | return r; | |
993 | ||
994 | r = portable_extract_by_path(image->path, matches, NULL, &unit_files, error); | |
995 | if (r < 0) | |
996 | return r; | |
997 | ||
998 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL); | |
999 | if (r < 0) | |
1000 | return r; | |
1001 | ||
90e74a66 | 1002 | HASHMAP_FOREACH(item, unit_files) { |
61d0578b LP |
1003 | r = unit_file_exists(UNIT_FILE_SYSTEM, &paths, item->name); |
1004 | if (r < 0) | |
1005 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether unit '%s' exists on the host: %m", item->name); | |
e26fe5f9 | 1006 | if (!FLAGS_SET(flags, PORTABLE_REATTACH) && r > 0) |
61d0578b LP |
1007 | return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' exists on the host already, refusing.", item->name); |
1008 | ||
1009 | r = unit_file_is_active(bus, item->name, error); | |
1010 | if (r < 0) | |
1011 | return r; | |
e26fe5f9 | 1012 | if (!FLAGS_SET(flags, PORTABLE_REATTACH) && r > 0) |
61d0578b LP |
1013 | return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' is active already, refusing.", item->name); |
1014 | } | |
1015 | ||
90e74a66 | 1016 | HASHMAP_FOREACH(item, unit_files) { |
61d0578b LP |
1017 | r = attach_unit_file(&paths, image->path, image->type, item, profile, flags, changes, n_changes); |
1018 | if (r < 0) | |
1019 | return r; | |
1020 | } | |
1021 | ||
1022 | /* We don't care too much for the image symlink, it's just a convenience thing, it's not necessary for proper | |
1023 | * operation otherwise. */ | |
1024 | (void) install_image_symlink(image->path, flags, changes, n_changes); | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static bool marker_matches_image(const char *marker, const char *name_or_path) { | |
1030 | const char *a; | |
1031 | ||
1032 | assert(marker); | |
1033 | assert(name_or_path); | |
1034 | ||
1035 | a = last_path_component(marker); | |
1036 | ||
1037 | if (image_name_is_valid(name_or_path)) { | |
9e4079d4 | 1038 | const char *e, *underscore; |
61d0578b LP |
1039 | |
1040 | /* We shall match against an image name. In that case let's compare the last component, and optionally | |
9e4079d4 LB |
1041 | * allow either a suffix of ".raw" or a series of "/". |
1042 | * But allow matching on a different version of the same image, when a "_" is used as a separator. */ | |
1043 | underscore = strchr(name_or_path, '_'); | |
1044 | if (underscore) | |
1045 | return strneq(a, name_or_path, underscore - name_or_path); | |
61d0578b LP |
1046 | |
1047 | e = startswith(a, name_or_path); | |
1048 | if (!e) | |
1049 | return false; | |
1050 | ||
1051 | return | |
1052 | e[strspn(e, "/")] == 0 || | |
1053 | streq(e, ".raw"); | |
1054 | } else { | |
9e4079d4 | 1055 | const char *b, *underscore; |
61d0578b LP |
1056 | size_t l; |
1057 | ||
1058 | /* We shall match against a path. Let's ignore any prefix here though, as often there are many ways to | |
1059 | * reach the same file. However, in this mode, let's validate any file suffix. */ | |
1060 | ||
1061 | l = strcspn(a, "/"); | |
1062 | b = last_path_component(name_or_path); | |
1063 | ||
1064 | if (strcspn(b, "/") != l) | |
1065 | return false; | |
1066 | ||
9e4079d4 LB |
1067 | underscore = strchr(b, '_'); |
1068 | if (underscore) | |
1069 | l = underscore - b; | |
1070 | ||
1071 | return strneq(a, b, l); | |
61d0578b LP |
1072 | } |
1073 | } | |
1074 | ||
1075 | static int test_chroot_dropin( | |
1076 | DIR *d, | |
1077 | const char *where, | |
1078 | const char *fname, | |
1079 | const char *name_or_path, | |
1080 | char **ret_marker) { | |
1081 | ||
1082 | _cleanup_free_ char *line = NULL, *marker = NULL; | |
1083 | _cleanup_fclose_ FILE *f = NULL; | |
1084 | _cleanup_close_ int fd = -1; | |
1085 | const char *p, *e, *k; | |
1086 | int r; | |
1087 | ||
1088 | assert(d); | |
1089 | assert(where); | |
1090 | assert(fname); | |
1091 | ||
1092 | /* We recognize unis created from portable images via the drop-in we created for them */ | |
1093 | ||
1094 | p = strjoina(fname, ".d/20-portable.conf"); | |
1095 | fd = openat(dirfd(d), p, O_RDONLY|O_CLOEXEC); | |
1096 | if (fd < 0) { | |
1097 | if (errno == ENOENT) | |
1098 | return 0; | |
1099 | ||
1100 | return log_debug_errno(errno, "Failed to open %s/%s: %m", where, p); | |
1101 | } | |
1102 | ||
4fa744a3 | 1103 | r = take_fdopen_unlocked(&fd, "r", &f); |
02e23d1a ZJS |
1104 | if (r < 0) |
1105 | return log_debug_errno(r, "Failed to convert file handle: %m"); | |
61d0578b LP |
1106 | |
1107 | r = read_line(f, LONG_LINE_MAX, &line); | |
1108 | if (r < 0) | |
1109 | return log_debug_errno(r, "Failed to read from %s/%s: %m", where, p); | |
1110 | ||
1111 | e = startswith(line, PORTABLE_DROPIN_MARKER_BEGIN); | |
1112 | if (!e) | |
1113 | return 0; | |
1114 | ||
1115 | k = endswith(e, PORTABLE_DROPIN_MARKER_END); | |
1116 | if (!k) | |
1117 | return 0; | |
1118 | ||
1119 | marker = strndup(e, k - e); | |
1120 | if (!marker) | |
1121 | return -ENOMEM; | |
1122 | ||
1123 | if (!name_or_path) | |
1124 | r = true; | |
1125 | else | |
1126 | r = marker_matches_image(marker, name_or_path); | |
1127 | ||
1128 | if (ret_marker) | |
1129 | *ret_marker = TAKE_PTR(marker); | |
1130 | ||
1131 | return r; | |
1132 | } | |
1133 | ||
1134 | int portable_detach( | |
1135 | sd_bus *bus, | |
1136 | const char *name_or_path, | |
1137 | PortableFlags flags, | |
1138 | PortableChange **changes, | |
1139 | size_t *n_changes, | |
1140 | sd_bus_error *error) { | |
1141 | ||
1142 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; | |
d378ef70 | 1143 | _cleanup_set_free_ Set *unit_files = NULL, *markers = NULL; |
61d0578b LP |
1144 | _cleanup_closedir_ DIR *d = NULL; |
1145 | const char *where, *item; | |
61d0578b LP |
1146 | struct dirent *de; |
1147 | int ret = 0; | |
1148 | int r; | |
1149 | ||
1150 | assert(name_or_path); | |
1151 | ||
1152 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL); | |
1153 | if (r < 0) | |
1154 | return r; | |
1155 | ||
40a7b232 | 1156 | where = attached_path(&paths, flags); |
61d0578b LP |
1157 | |
1158 | d = opendir(where); | |
339731db LP |
1159 | if (!d) { |
1160 | if (errno == ENOENT) | |
1161 | goto not_found; | |
1162 | ||
61d0578b | 1163 | return log_debug_errno(errno, "Failed to open '%s' directory: %m", where); |
339731db | 1164 | } |
61d0578b | 1165 | |
61d0578b LP |
1166 | FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to enumerate '%s' directory: %m", where)) { |
1167 | _cleanup_free_ char *marker = NULL; | |
1168 | UnitFileState state; | |
1169 | ||
1170 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
1171 | continue; | |
1172 | ||
1173 | /* Filter out duplicates */ | |
be327321 | 1174 | if (set_contains(unit_files, de->d_name)) |
61d0578b LP |
1175 | continue; |
1176 | ||
1177 | dirent_ensure_type(d, de); | |
1178 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
1179 | continue; | |
1180 | ||
1181 | r = test_chroot_dropin(d, where, de->d_name, name_or_path, &marker); | |
1182 | if (r < 0) | |
1183 | return r; | |
1184 | if (r == 0) | |
1185 | continue; | |
1186 | ||
1187 | r = unit_file_lookup_state(UNIT_FILE_SYSTEM, &paths, de->d_name, &state); | |
1188 | if (r < 0) | |
1189 | return log_debug_errno(r, "Failed to determine unit file state of '%s': %m", de->d_name); | |
c3d809ef | 1190 | if (!IN_SET(state, UNIT_FILE_STATIC, UNIT_FILE_DISABLED, UNIT_FILE_LINKED, UNIT_FILE_RUNTIME, UNIT_FILE_LINKED_RUNTIME)) |
61d0578b LP |
1191 | return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' is in state '%s', can't detach.", de->d_name, unit_file_state_to_string(state)); |
1192 | ||
1193 | r = unit_file_is_active(bus, de->d_name, error); | |
1194 | if (r < 0) | |
1195 | return r; | |
e26fe5f9 | 1196 | if (!FLAGS_SET(flags, PORTABLE_REATTACH) && r > 0) |
61d0578b LP |
1197 | return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' is active, can't detach.", de->d_name); |
1198 | ||
be327321 | 1199 | r = set_put_strdup(&unit_files, de->d_name); |
61d0578b LP |
1200 | if (r < 0) |
1201 | return log_debug_errno(r, "Failed to add unit name '%s' to set: %m", de->d_name); | |
1202 | ||
1203 | if (path_is_absolute(marker) && | |
d577d4a4 | 1204 | !image_in_search_path(IMAGE_PORTABLE, NULL, marker)) { |
61d0578b | 1205 | |
d378ef70 ZJS |
1206 | r = set_ensure_consume(&markers, &path_hash_ops_free, TAKE_PTR(marker)); |
1207 | if (r < 0) | |
61d0578b LP |
1208 | return r; |
1209 | } | |
1210 | } | |
1211 | ||
339731db LP |
1212 | if (set_isempty(unit_files)) |
1213 | goto not_found; | |
61d0578b | 1214 | |
90e74a66 | 1215 | SET_FOREACH(item, unit_files) { |
61d0578b LP |
1216 | _cleanup_free_ char *md = NULL; |
1217 | const char *suffix; | |
1218 | ||
1219 | if (unlinkat(dirfd(d), item, 0) < 0) { | |
1220 | log_debug_errno(errno, "Can't remove unit file %s/%s: %m", where, item); | |
1221 | ||
1222 | if (errno != ENOENT && ret >= 0) | |
1223 | ret = -errno; | |
1224 | } else | |
1225 | portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, item, NULL); | |
1226 | ||
1227 | FOREACH_STRING(suffix, ".d/10-profile.conf", ".d/20-portable.conf") { | |
1228 | _cleanup_free_ char *dropin = NULL; | |
1229 | ||
1230 | dropin = strjoin(item, suffix); | |
1231 | if (!dropin) | |
1232 | return -ENOMEM; | |
1233 | ||
1234 | if (unlinkat(dirfd(d), dropin, 0) < 0) { | |
1235 | log_debug_errno(errno, "Can't remove drop-in %s/%s: %m", where, dropin); | |
1236 | ||
1237 | if (errno != ENOENT && ret >= 0) | |
1238 | ret = -errno; | |
1239 | } else | |
1240 | portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, dropin, NULL); | |
1241 | } | |
1242 | ||
1243 | md = strjoin(item, ".d"); | |
1244 | if (!md) | |
1245 | return -ENOMEM; | |
1246 | ||
1247 | if (unlinkat(dirfd(d), md, AT_REMOVEDIR) < 0) { | |
1248 | log_debug_errno(errno, "Can't remove drop-in directory %s/%s: %m", where, md); | |
1249 | ||
1250 | if (errno != ENOENT && ret >= 0) | |
1251 | ret = -errno; | |
1252 | } else | |
1253 | portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, md, NULL); | |
1254 | } | |
1255 | ||
1256 | /* Now, also drop any image symlink, for images outside of the sarch path */ | |
90e74a66 | 1257 | SET_FOREACH(item, markers) { |
61d0578b LP |
1258 | _cleanup_free_ char *sl = NULL; |
1259 | struct stat st; | |
1260 | ||
1261 | r = image_symlink(item, flags, &sl); | |
1262 | if (r < 0) { | |
1263 | log_debug_errno(r, "Failed to determine image symlink for '%s', ignoring: %m", item); | |
1264 | continue; | |
1265 | } | |
1266 | ||
1267 | if (lstat(sl, &st) < 0) { | |
1268 | log_debug_errno(errno, "Failed to stat '%s', ignoring: %m", sl); | |
1269 | continue; | |
1270 | } | |
1271 | ||
1272 | if (!S_ISLNK(st.st_mode)) { | |
1273 | log_debug("Image '%s' is not a symlink, ignoring.", sl); | |
1274 | continue; | |
1275 | } | |
1276 | ||
1277 | if (unlink(sl) < 0) { | |
1278 | log_debug_errno(errno, "Can't remove image symlink '%s': %m", sl); | |
1279 | ||
1280 | if (errno != ENOENT && ret >= 0) | |
1281 | ret = -errno; | |
1282 | } else | |
1283 | portable_changes_add(changes, n_changes, PORTABLE_UNLINK, sl, NULL); | |
1284 | } | |
1285 | ||
d09d85a2 LP |
1286 | /* Try to remove the unit file directory, if we can */ |
1287 | if (rmdir(where) >= 0) | |
1288 | portable_changes_add(changes, n_changes, PORTABLE_UNLINK, where, NULL); | |
1289 | ||
61d0578b | 1290 | return ret; |
339731db LP |
1291 | |
1292 | not_found: | |
1293 | log_debug("No unit files associated with '%s' found. Image not attached?", name_or_path); | |
1294 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "No unit files associated with '%s' found. Image not attached?", name_or_path); | |
61d0578b LP |
1295 | } |
1296 | ||
1297 | static int portable_get_state_internal( | |
1298 | sd_bus *bus, | |
1299 | const char *name_or_path, | |
1300 | PortableFlags flags, | |
1301 | PortableState *ret, | |
1302 | sd_bus_error *error) { | |
1303 | ||
1304 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; | |
1305 | bool found_enabled = false, found_running = false; | |
be327321 | 1306 | _cleanup_set_free_ Set *unit_files = NULL; |
61d0578b LP |
1307 | _cleanup_closedir_ DIR *d = NULL; |
1308 | const char *where; | |
1309 | struct dirent *de; | |
1310 | int r; | |
1311 | ||
1312 | assert(name_or_path); | |
1313 | assert(ret); | |
1314 | ||
1315 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL); | |
1316 | if (r < 0) | |
1317 | return r; | |
1318 | ||
40a7b232 | 1319 | where = attached_path(&paths, flags); |
61d0578b LP |
1320 | |
1321 | d = opendir(where); | |
339731db LP |
1322 | if (!d) { |
1323 | if (errno == ENOENT) { | |
1324 | /* If the 'attached' directory doesn't exist at all, then we know for sure this image isn't attached. */ | |
1325 | *ret = PORTABLE_DETACHED; | |
1326 | return 0; | |
1327 | } | |
1328 | ||
61d0578b | 1329 | return log_debug_errno(errno, "Failed to open '%s' directory: %m", where); |
339731db | 1330 | } |
61d0578b | 1331 | |
61d0578b LP |
1332 | FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to enumerate '%s' directory: %m", where)) { |
1333 | UnitFileState state; | |
1334 | ||
1335 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
1336 | continue; | |
1337 | ||
1338 | /* Filter out duplicates */ | |
be327321 | 1339 | if (set_contains(unit_files, de->d_name)) |
61d0578b LP |
1340 | continue; |
1341 | ||
1342 | dirent_ensure_type(d, de); | |
1343 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
1344 | continue; | |
1345 | ||
1346 | r = test_chroot_dropin(d, where, de->d_name, name_or_path, NULL); | |
1347 | if (r < 0) | |
1348 | return r; | |
1349 | if (r == 0) | |
1350 | continue; | |
1351 | ||
1352 | r = unit_file_lookup_state(UNIT_FILE_SYSTEM, &paths, de->d_name, &state); | |
1353 | if (r < 0) | |
1354 | return log_debug_errno(r, "Failed to determine unit file state of '%s': %m", de->d_name); | |
1355 | if (!IN_SET(state, UNIT_FILE_STATIC, UNIT_FILE_DISABLED, UNIT_FILE_LINKED, UNIT_FILE_LINKED_RUNTIME)) | |
1356 | found_enabled = true; | |
1357 | ||
1358 | r = unit_file_is_active(bus, de->d_name, error); | |
1359 | if (r < 0) | |
1360 | return r; | |
1361 | if (r > 0) | |
1362 | found_running = true; | |
1363 | ||
be327321 | 1364 | r = set_put_strdup(&unit_files, de->d_name); |
61d0578b LP |
1365 | if (r < 0) |
1366 | return log_debug_errno(r, "Failed to add unit name '%s' to set: %m", de->d_name); | |
1367 | } | |
1368 | ||
1369 | *ret = found_running ? (!set_isempty(unit_files) && (flags & PORTABLE_RUNTIME) ? PORTABLE_RUNNING_RUNTIME : PORTABLE_RUNNING) : | |
1370 | found_enabled ? (flags & PORTABLE_RUNTIME ? PORTABLE_ENABLED_RUNTIME : PORTABLE_ENABLED) : | |
1371 | !set_isempty(unit_files) ? (flags & PORTABLE_RUNTIME ? PORTABLE_ATTACHED_RUNTIME : PORTABLE_ATTACHED) : PORTABLE_DETACHED; | |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | int portable_get_state( | |
1377 | sd_bus *bus, | |
1378 | const char *name_or_path, | |
1379 | PortableFlags flags, | |
1380 | PortableState *ret, | |
1381 | sd_bus_error *error) { | |
1382 | ||
1383 | PortableState state; | |
1384 | int r; | |
1385 | ||
1386 | assert(name_or_path); | |
1387 | assert(ret); | |
1388 | ||
1389 | /* We look for matching units twice: once in the regular directories, and once in the runtime directories — but | |
1390 | * the latter only if we didn't find anything in the former. */ | |
1391 | ||
1392 | r = portable_get_state_internal(bus, name_or_path, flags & ~PORTABLE_RUNTIME, &state, error); | |
1393 | if (r < 0) | |
1394 | return r; | |
1395 | ||
1396 | if (state == PORTABLE_DETACHED) { | |
1397 | r = portable_get_state_internal(bus, name_or_path, flags | PORTABLE_RUNTIME, &state, error); | |
1398 | if (r < 0) | |
1399 | return r; | |
1400 | } | |
1401 | ||
1402 | *ret = state; | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | int portable_get_profiles(char ***ret) { | |
1407 | assert(ret); | |
1408 | ||
1409 | return conf_files_list_nulstr(ret, NULL, NULL, CONF_FILES_DIRECTORY|CONF_FILES_BASENAME|CONF_FILES_FILTER_MASKED, profile_dirs); | |
1410 | } | |
1411 | ||
1412 | static const char* const portable_change_type_table[_PORTABLE_CHANGE_TYPE_MAX] = { | |
1413 | [PORTABLE_COPY] = "copy", | |
1414 | [PORTABLE_MKDIR] = "mkdir", | |
1415 | [PORTABLE_SYMLINK] = "symlink", | |
1416 | [PORTABLE_UNLINK] = "unlink", | |
1417 | [PORTABLE_WRITE] = "write", | |
1418 | }; | |
1419 | ||
1420 | DEFINE_STRING_TABLE_LOOKUP(portable_change_type, PortableChangeType); | |
1421 | ||
1422 | static const char* const portable_state_table[_PORTABLE_STATE_MAX] = { | |
1423 | [PORTABLE_DETACHED] = "detached", | |
1424 | [PORTABLE_ATTACHED] = "attached", | |
1425 | [PORTABLE_ATTACHED_RUNTIME] = "attached-runtime", | |
1426 | [PORTABLE_ENABLED] = "enabled", | |
1427 | [PORTABLE_ENABLED_RUNTIME] = "enabled-runtime", | |
1428 | [PORTABLE_RUNNING] = "running", | |
1429 | [PORTABLE_RUNNING_RUNTIME] = "running-runtime", | |
1430 | }; | |
1431 | ||
1432 | DEFINE_STRING_TABLE_LOOKUP(portable_state, PortableState); |