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Commit | Line | Data |
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61d0578b LP |
1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
2 | ||
61d0578b LP |
3 | #include "bus-common-errors.h" |
4 | #include "bus-error.h" | |
5 | #include "conf-files.h" | |
6 | #include "copy.h" | |
7 | #include "def.h" | |
8 | #include "dirent-util.h" | |
9 | #include "dissect-image.h" | |
10 | #include "fd-util.h" | |
11 | #include "fileio.h" | |
12 | #include "fs-util.h" | |
13 | #include "io-util.h" | |
14 | #include "locale-util.h" | |
15 | #include "loop-util.h" | |
16 | #include "machine-image.h" | |
17 | #include "mkdir.h" | |
d8b4d14d | 18 | #include "nulstr-util.h" |
61d0578b LP |
19 | #include "os-util.h" |
20 | #include "path-lookup.h" | |
21 | #include "portable.h" | |
22 | #include "process-util.h" | |
23 | #include "set.h" | |
24 | #include "signal-util.h" | |
25 | #include "socket-util.h" | |
760877e9 | 26 | #include "sort-util.h" |
61d0578b LP |
27 | #include "string-table.h" |
28 | #include "strv.h" | |
e4de7287 | 29 | #include "tmpfile-util.h" |
61d0578b LP |
30 | #include "user-util.h" |
31 | ||
32 | static const char profile_dirs[] = CONF_PATHS_NULSTR("systemd/portable/profile"); | |
33 | ||
34 | /* Markers used in the first line of our 20-portable.conf unit file drop-in to determine, that a) the unit file was | |
35 | * dropped there by the portable service logic and b) for which image it was dropped there. */ | |
36 | #define PORTABLE_DROPIN_MARKER_BEGIN "# Drop-in created for image '" | |
37 | #define PORTABLE_DROPIN_MARKER_END "', do not edit." | |
38 | ||
39 | static bool prefix_match(const char *unit, const char *prefix) { | |
40 | const char *p; | |
41 | ||
42 | p = startswith(unit, prefix); | |
43 | if (!p) | |
44 | return false; | |
45 | ||
46 | /* Only respect prefixes followed by dash or dot or when there's a complete match */ | |
47 | return IN_SET(*p, '-', '.', '@', 0); | |
48 | } | |
49 | ||
50 | static bool unit_match(const char *unit, char **matches) { | |
51 | const char *dot; | |
52 | char **i; | |
53 | ||
54 | dot = strrchr(unit, '.'); | |
55 | if (!dot) | |
56 | return false; | |
57 | ||
58 | if (!STR_IN_SET(dot, ".service", ".socket", ".target", ".timer", ".path")) | |
59 | return false; | |
60 | ||
61 | /* Empty match expression means: everything */ | |
62 | if (strv_isempty(matches)) | |
63 | return true; | |
64 | ||
65 | /* Otherwise, at least one needs to match */ | |
66 | STRV_FOREACH(i, matches) | |
67 | if (prefix_match(unit, *i)) | |
68 | return true; | |
69 | ||
70 | return false; | |
71 | } | |
72 | ||
73 | static PortableMetadata *portable_metadata_new(const char *name, int fd) { | |
74 | PortableMetadata *m; | |
75 | ||
76 | m = malloc0(offsetof(PortableMetadata, name) + strlen(name) + 1); | |
77 | if (!m) | |
78 | return NULL; | |
79 | ||
80 | strcpy(m->name, name); | |
81 | m->fd = fd; | |
82 | ||
83 | return m; | |
84 | } | |
85 | ||
86 | PortableMetadata *portable_metadata_unref(PortableMetadata *i) { | |
87 | if (!i) | |
88 | return NULL; | |
89 | ||
90 | safe_close(i->fd); | |
91 | free(i->source); | |
92 | ||
93 | return mfree(i); | |
94 | } | |
95 | ||
61d0578b LP |
96 | static int compare_metadata(PortableMetadata *const *x, PortableMetadata *const *y) { |
97 | return strcmp((*x)->name, (*y)->name); | |
98 | } | |
99 | ||
100 | int portable_metadata_hashmap_to_sorted_array(Hashmap *unit_files, PortableMetadata ***ret) { | |
101 | ||
102 | _cleanup_free_ PortableMetadata **sorted = NULL; | |
103 | Iterator iterator; | |
104 | PortableMetadata *item; | |
105 | size_t k = 0; | |
106 | ||
107 | sorted = new(PortableMetadata*, hashmap_size(unit_files)); | |
108 | if (!sorted) | |
109 | return -ENOMEM; | |
110 | ||
111 | HASHMAP_FOREACH(item, unit_files, iterator) | |
112 | sorted[k++] = item; | |
113 | ||
114 | assert(k == hashmap_size(unit_files)); | |
115 | ||
116 | typesafe_qsort(sorted, k, compare_metadata); | |
117 | ||
118 | *ret = TAKE_PTR(sorted); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static int send_item( | |
123 | int socket_fd, | |
124 | const char *name, | |
125 | int fd) { | |
126 | ||
127 | union { | |
128 | struct cmsghdr cmsghdr; | |
129 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
130 | } control = {}; | |
131 | struct iovec iovec; | |
132 | struct msghdr mh = { | |
133 | .msg_control = &control, | |
134 | .msg_controllen = sizeof(control), | |
135 | .msg_iov = &iovec, | |
136 | .msg_iovlen = 1, | |
137 | }; | |
138 | struct cmsghdr *cmsg; | |
139 | _cleanup_close_ int data_fd = -1; | |
140 | ||
141 | assert(socket_fd >= 0); | |
142 | assert(name); | |
143 | assert(fd >= 0); | |
144 | ||
145 | data_fd = fd_duplicate_data_fd(fd); | |
146 | if (data_fd < 0) | |
147 | return data_fd; | |
148 | ||
149 | cmsg = CMSG_FIRSTHDR(&mh); | |
150 | cmsg->cmsg_level = SOL_SOCKET; | |
151 | cmsg->cmsg_type = SCM_RIGHTS; | |
152 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
153 | memcpy(CMSG_DATA(cmsg), &data_fd, sizeof(int)); | |
154 | ||
155 | mh.msg_controllen = CMSG_SPACE(sizeof(int)); | |
156 | iovec = IOVEC_MAKE_STRING(name); | |
157 | ||
158 | if (sendmsg(socket_fd, &mh, MSG_NOSIGNAL) < 0) | |
159 | return -errno; | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static int recv_item( | |
165 | int socket_fd, | |
166 | char **ret_name, | |
167 | int *ret_fd) { | |
168 | ||
169 | union { | |
170 | struct cmsghdr cmsghdr; | |
171 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
172 | } control = {}; | |
173 | char buffer[PATH_MAX+2]; | |
174 | struct iovec iov = IOVEC_INIT(buffer, sizeof(buffer)-1); | |
175 | struct msghdr mh = { | |
176 | .msg_control = &control, | |
177 | .msg_controllen = sizeof(control), | |
178 | .msg_iov = &iov, | |
179 | .msg_iovlen = 1, | |
180 | }; | |
181 | struct cmsghdr *cmsg; | |
182 | _cleanup_close_ int found_fd = -1; | |
183 | char *copy; | |
184 | ssize_t n; | |
185 | ||
186 | assert(socket_fd >= 0); | |
187 | assert(ret_name); | |
188 | assert(ret_fd); | |
189 | ||
a6887cc0 | 190 | n = recvmsg(socket_fd, &mh, MSG_CMSG_CLOEXEC); |
61d0578b LP |
191 | if (n < 0) |
192 | return -errno; | |
193 | ||
194 | CMSG_FOREACH(cmsg, &mh) { | |
195 | if (cmsg->cmsg_level == SOL_SOCKET && | |
196 | cmsg->cmsg_type == SCM_RIGHTS) { | |
197 | ||
198 | if (cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
199 | assert(found_fd < 0); | |
200 | found_fd = *(int*) CMSG_DATA(cmsg); | |
201 | break; | |
202 | } | |
203 | ||
204 | cmsg_close_all(&mh); | |
205 | return -EIO; | |
206 | } | |
207 | } | |
208 | ||
209 | buffer[n] = 0; | |
210 | ||
211 | copy = strdup(buffer); | |
212 | if (!copy) | |
213 | return -ENOMEM; | |
214 | ||
215 | *ret_name = copy; | |
216 | *ret_fd = TAKE_FD(found_fd); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
67818055 YW |
221 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(portable_metadata_hash_ops, char, string_hash_func, string_compare_func, |
222 | PortableMetadata, portable_metadata_unref); | |
223 | ||
61d0578b LP |
224 | static int extract_now( |
225 | const char *where, | |
226 | char **matches, | |
227 | int socket_fd, | |
228 | PortableMetadata **ret_os_release, | |
229 | Hashmap **ret_unit_files) { | |
230 | ||
67818055 | 231 | _cleanup_hashmap_free_ Hashmap *unit_files = NULL; |
61d0578b LP |
232 | _cleanup_(portable_metadata_unrefp) PortableMetadata *os_release = NULL; |
233 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; | |
234 | _cleanup_close_ int os_release_fd = -1; | |
235 | _cleanup_free_ char *os_release_path = NULL; | |
236 | char **i; | |
237 | int r; | |
238 | ||
239 | /* Extracts the metadata from a directory tree 'where'. Extracts two kinds of information: the /etc/os-release | |
240 | * data, and all unit files matching the specified expression. Note that this function is called in two very | |
241 | * different but also similar contexts. When the tool gets invoked on a directory tree, we'll process it | |
242 | * directly, and in-process, and thus can return the requested data directly, via 'ret_os_release' and | |
243 | * 'ret_unit_files'. However, if the tool is invoked on a raw disk image — which needs to be mounted first — we | |
244 | * are invoked in a child process with private mounts and then need to send the collected data to our | |
245 | * parent. To handle both cases in one call this function also gets a 'socket_fd' parameter, which when >= 0 is | |
246 | * used to send the data to the parent. */ | |
247 | ||
248 | assert(where); | |
249 | ||
250 | /* First, find /etc/os-release and send it upstream (or just save it). */ | |
251 | r = open_os_release(where, &os_release_path, &os_release_fd); | |
252 | if (r < 0) | |
253 | log_debug_errno(r, "Couldn't acquire os-release file, ignoring: %m"); | |
254 | else { | |
255 | if (socket_fd >= 0) { | |
256 | r = send_item(socket_fd, "/etc/os-release", os_release_fd); | |
257 | if (r < 0) | |
258 | return log_debug_errno(r, "Failed to send os-release file: %m"); | |
259 | } | |
260 | ||
261 | if (ret_os_release) { | |
262 | os_release = portable_metadata_new("/etc/os-release", os_release_fd); | |
263 | if (!os_release) | |
264 | return -ENOMEM; | |
265 | ||
266 | os_release_fd = -1; | |
267 | os_release->source = TAKE_PTR(os_release_path); | |
268 | } | |
269 | } | |
270 | ||
271 | /* Then, send unit file data to the parent (or/and add it to the hashmap). For that we use our usual unit | |
272 | * discovery logic. Note that we force looking inside of /lib/systemd/system/ for units too, as we mightbe | |
273 | * compiled for a split-usr system but the image might be a legacy-usr one. */ | |
274 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, where); | |
275 | if (r < 0) | |
276 | return log_debug_errno(r, "Failed to acquire lookup paths: %m"); | |
277 | ||
67818055 | 278 | unit_files = hashmap_new(&portable_metadata_hash_ops); |
61d0578b LP |
279 | if (!unit_files) |
280 | return -ENOMEM; | |
281 | ||
282 | STRV_FOREACH(i, paths.search_path) { | |
283 | _cleanup_free_ char *resolved = NULL; | |
284 | _cleanup_closedir_ DIR *d = NULL; | |
285 | struct dirent *de; | |
286 | ||
287 | r = chase_symlinks_and_opendir(*i, where, 0, &resolved, &d); | |
288 | if (r < 0) { | |
289 | log_debug_errno(r, "Failed to open unit path '%s', ignoring: %m", *i); | |
290 | continue; | |
291 | } | |
292 | ||
293 | FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to read directory: %m")) { | |
294 | _cleanup_(portable_metadata_unrefp) PortableMetadata *m = NULL; | |
295 | _cleanup_close_ int fd = -1; | |
296 | ||
297 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
298 | continue; | |
299 | ||
300 | if (!unit_match(de->d_name, matches)) | |
301 | continue; | |
302 | ||
303 | /* Filter out duplicates */ | |
304 | if (hashmap_get(unit_files, de->d_name)) | |
305 | continue; | |
306 | ||
307 | dirent_ensure_type(d, de); | |
308 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
309 | continue; | |
310 | ||
311 | fd = openat(dirfd(d), de->d_name, O_CLOEXEC|O_RDONLY); | |
312 | if (fd < 0) { | |
313 | log_debug_errno(errno, "Failed to open unit file '%s', ignoring: %m", de->d_name); | |
314 | continue; | |
315 | } | |
316 | ||
317 | if (socket_fd >= 0) { | |
318 | r = send_item(socket_fd, de->d_name, fd); | |
319 | if (r < 0) | |
320 | return log_debug_errno(r, "Failed to send unit metadata to parent: %m"); | |
321 | } | |
322 | ||
323 | m = portable_metadata_new(de->d_name, fd); | |
324 | if (!m) | |
325 | return -ENOMEM; | |
326 | fd = -1; | |
327 | ||
328 | m->source = strjoin(resolved, "/", de->d_name); | |
329 | if (!m->source) | |
330 | return -ENOMEM; | |
331 | ||
332 | r = hashmap_put(unit_files, m->name, m); | |
333 | if (r < 0) | |
334 | return log_debug_errno(r, "Failed to add unit to hashmap: %m"); | |
335 | m = NULL; | |
336 | } | |
337 | } | |
338 | ||
339 | if (ret_os_release) | |
340 | *ret_os_release = TAKE_PTR(os_release); | |
341 | if (ret_unit_files) | |
342 | *ret_unit_files = TAKE_PTR(unit_files); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static int portable_extract_by_path( | |
348 | const char *path, | |
349 | char **matches, | |
350 | PortableMetadata **ret_os_release, | |
351 | Hashmap **ret_unit_files, | |
352 | sd_bus_error *error) { | |
353 | ||
67818055 | 354 | _cleanup_hashmap_free_ Hashmap *unit_files = NULL; |
61d0578b LP |
355 | _cleanup_(portable_metadata_unrefp) PortableMetadata* os_release = NULL; |
356 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; | |
357 | int r; | |
358 | ||
359 | assert(path); | |
360 | ||
361 | r = loop_device_make_by_path(path, O_RDONLY, &d); | |
362 | if (r == -EISDIR) { | |
363 | /* We can't turn this into a loop-back block device, and this returns EISDIR? Then this is a directory | |
364 | * tree and not a raw device. It's easy then. */ | |
365 | ||
366 | r = extract_now(path, matches, -1, &os_release, &unit_files); | |
367 | if (r < 0) | |
368 | return r; | |
369 | ||
370 | } else if (r < 0) | |
371 | return log_debug_errno(r, "Failed to set up loopback device: %m"); | |
372 | else { | |
373 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
374 | _cleanup_(rmdir_and_freep) char *tmpdir = NULL; | |
375 | _cleanup_(close_pairp) int seq[2] = { -1, -1 }; | |
376 | _cleanup_(sigkill_waitp) pid_t child = 0; | |
377 | ||
378 | /* We now have a loopback block device, let's fork off a child in its own mount namespace, mount it | |
379 | * there, and extract the metadata we need. The metadata is sent from the child back to us. */ | |
380 | ||
381 | BLOCK_SIGNALS(SIGCHLD); | |
382 | ||
383 | r = mkdtemp_malloc("/tmp/inspect-XXXXXX", &tmpdir); | |
384 | if (r < 0) | |
385 | return log_debug_errno(r, "Failed to create temporary directory: %m"); | |
386 | ||
387 | r = dissect_image(d->fd, NULL, 0, DISSECT_IMAGE_READ_ONLY|DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_DISCARD_ON_LOOP, &m); | |
388 | if (r == -ENOPKG) | |
389 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Couldn't identify a suitable partition table or file system in '%s'.", path); | |
390 | else if (r == -EADDRNOTAVAIL) | |
391 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "No root partition for specified root hash found in '%s'.", path); | |
392 | else if (r == -ENOTUNIQ) | |
393 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Multiple suitable root partitions found in image '%s'.", path); | |
394 | else if (r == -ENXIO) | |
395 | sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "No suitable root partition found in image '%s'.", path); | |
396 | else if (r == -EPROTONOSUPPORT) | |
397 | 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); | |
398 | if (r < 0) | |
399 | return r; | |
400 | ||
401 | if (socketpair(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0, seq) < 0) | |
402 | return log_debug_errno(errno, "Failed to allocated SOCK_SEQPACKET socket: %m"); | |
403 | ||
404 | r = safe_fork("(sd-dissect)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE|FORK_LOG, &child); | |
405 | if (r < 0) | |
406 | return r; | |
407 | if (r == 0) { | |
408 | seq[0] = safe_close(seq[0]); | |
409 | ||
410 | r = dissected_image_mount(m, tmpdir, UID_INVALID, DISSECT_IMAGE_READ_ONLY|DISSECT_IMAGE_VALIDATE_OS); | |
411 | if (r < 0) { | |
412 | log_debug_errno(r, "Failed to mount dissected image: %m"); | |
413 | goto child_finish; | |
414 | } | |
415 | ||
416 | r = extract_now(tmpdir, matches, seq[1], NULL, NULL); | |
417 | ||
418 | child_finish: | |
419 | _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS); | |
420 | } | |
421 | ||
422 | seq[1] = safe_close(seq[1]); | |
423 | ||
67818055 | 424 | unit_files = hashmap_new(&portable_metadata_hash_ops); |
61d0578b LP |
425 | if (!unit_files) |
426 | return -ENOMEM; | |
427 | ||
428 | for (;;) { | |
429 | _cleanup_(portable_metadata_unrefp) PortableMetadata *add = NULL; | |
430 | _cleanup_free_ char *name = NULL; | |
431 | _cleanup_close_ int fd = -1; | |
432 | ||
433 | r = recv_item(seq[0], &name, &fd); | |
434 | if (r < 0) | |
435 | return log_debug_errno(r, "Failed to receive item: %m"); | |
436 | ||
437 | /* We can't really distuingish a zero-length datagram without any fds from EOF (both are signalled the | |
438 | * same way by recvmsg()). Hence, accept either as end notification. */ | |
439 | if (isempty(name) && fd < 0) | |
440 | break; | |
441 | ||
442 | if (isempty(name) || fd < 0) { | |
443 | log_debug("Invalid item sent from child."); | |
444 | return -EINVAL; | |
445 | } | |
446 | ||
447 | add = portable_metadata_new(name, fd); | |
448 | if (!add) | |
449 | return -ENOMEM; | |
450 | fd = -1; | |
451 | ||
452 | /* Note that we do not initialize 'add->source' here, as the source path is not usable here as | |
453 | * it refers to a path only valid in the short-living namespaced child process we forked | |
454 | * here. */ | |
455 | ||
456 | if (PORTABLE_METADATA_IS_UNIT(add)) { | |
457 | r = hashmap_put(unit_files, add->name, add); | |
458 | if (r < 0) | |
459 | return log_debug_errno(r, "Failed to add item to unit file list: %m"); | |
460 | ||
461 | add = NULL; | |
462 | ||
463 | } else if (PORTABLE_METADATA_IS_OS_RELEASE(add)) { | |
464 | ||
465 | assert(!os_release); | |
466 | os_release = TAKE_PTR(add); | |
467 | } else | |
468 | assert_not_reached("Unexpected metadata item from child."); | |
469 | } | |
470 | ||
471 | r = wait_for_terminate_and_check("(sd-dissect)", child, 0); | |
472 | if (r < 0) | |
473 | return r; | |
474 | child = 0; | |
475 | } | |
476 | ||
477 | if (!os_release) | |
478 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Image '%s' lacks os-release data, refusing.", path); | |
479 | ||
480 | if (hashmap_isempty(unit_files)) | |
481 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Couldn't find any matching unit files in image '%s', refusing.", path); | |
482 | ||
483 | if (ret_unit_files) | |
484 | *ret_unit_files = TAKE_PTR(unit_files); | |
485 | ||
486 | if (ret_os_release) | |
487 | *ret_os_release = TAKE_PTR(os_release); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | int portable_extract( | |
493 | const char *name_or_path, | |
494 | char **matches, | |
495 | PortableMetadata **ret_os_release, | |
496 | Hashmap **ret_unit_files, | |
497 | sd_bus_error *error) { | |
498 | ||
499 | _cleanup_(image_unrefp) Image *image = NULL; | |
500 | int r; | |
501 | ||
502 | assert(name_or_path); | |
503 | ||
504 | r = image_find_harder(IMAGE_PORTABLE, name_or_path, &image); | |
505 | if (r < 0) | |
506 | return r; | |
507 | ||
508 | return portable_extract_by_path(image->path, matches, ret_os_release, ret_unit_files, error); | |
509 | } | |
510 | ||
511 | static int unit_file_is_active( | |
512 | sd_bus *bus, | |
513 | const char *name, | |
514 | sd_bus_error *error) { | |
515 | ||
516 | static const char *const active_states[] = { | |
517 | "activating", | |
518 | "active", | |
519 | "reloading", | |
520 | "deactivating", | |
521 | NULL, | |
522 | }; | |
523 | int r; | |
524 | ||
525 | if (!bus) | |
526 | return false; | |
527 | ||
528 | /* If we are looking at a plain or instance things are easy, we can just query the state */ | |
529 | if (unit_name_is_valid(name, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) { | |
530 | _cleanup_free_ char *path = NULL, *buf = NULL; | |
531 | ||
532 | path = unit_dbus_path_from_name(name); | |
533 | if (!path) | |
534 | return -ENOMEM; | |
535 | ||
536 | r = sd_bus_get_property_string( | |
537 | bus, | |
538 | "org.freedesktop.systemd1", | |
539 | path, | |
540 | "org.freedesktop.systemd1.Unit", | |
541 | "ActiveState", | |
542 | error, | |
543 | &buf); | |
544 | if (r < 0) | |
545 | return log_debug_errno(r, "Failed to retrieve unit state: %s", bus_error_message(error, r)); | |
546 | ||
547 | return strv_contains((char**) active_states, buf); | |
548 | } | |
549 | ||
550 | /* Otherwise we need to enumerate. But let's build the most restricted query we can */ | |
551 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { | |
552 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; | |
553 | const char *at, *prefix, *joined; | |
554 | ||
555 | r = sd_bus_message_new_method_call( | |
556 | bus, | |
557 | &m, | |
558 | "org.freedesktop.systemd1", | |
559 | "/org/freedesktop/systemd1", | |
560 | "org.freedesktop.systemd1.Manager", | |
561 | "ListUnitsByPatterns"); | |
562 | if (r < 0) | |
563 | return r; | |
564 | ||
565 | r = sd_bus_message_append_strv(m, (char**) active_states); | |
566 | if (r < 0) | |
567 | return r; | |
568 | ||
569 | at = strchr(name, '@'); | |
570 | assert(at); | |
571 | ||
572 | prefix = strndupa(name, at + 1 - name); | |
573 | joined = strjoina(prefix, "*", at + 1); | |
574 | ||
575 | r = sd_bus_message_append_strv(m, STRV_MAKE(joined)); | |
576 | if (r < 0) | |
577 | return r; | |
578 | ||
579 | r = sd_bus_call(bus, m, 0, error, &reply); | |
580 | if (r < 0) | |
581 | return log_debug_errno(r, "Failed to list units: %s", bus_error_message(error, r)); | |
582 | ||
583 | r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssssouso)"); | |
584 | if (r < 0) | |
585 | return r; | |
586 | ||
587 | r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_STRUCT, "ssssssouso"); | |
588 | if (r < 0) | |
589 | return r; | |
590 | ||
591 | return r > 0; | |
592 | } | |
593 | ||
594 | return -EINVAL; | |
595 | } | |
596 | ||
597 | static int portable_changes_add( | |
598 | PortableChange **changes, | |
599 | size_t *n_changes, | |
600 | PortableChangeType type, | |
601 | const char *path, | |
602 | const char *source) { | |
603 | ||
604 | _cleanup_free_ char *p = NULL, *s = NULL; | |
605 | PortableChange *c; | |
606 | ||
607 | assert(path); | |
608 | assert(!changes == !n_changes); | |
609 | ||
610 | if (!changes) | |
611 | return 0; | |
612 | ||
613 | c = reallocarray(*changes, *n_changes + 1, sizeof(PortableChange)); | |
614 | if (!c) | |
615 | return -ENOMEM; | |
616 | *changes = c; | |
617 | ||
618 | p = strdup(path); | |
619 | if (!p) | |
620 | return -ENOMEM; | |
621 | ||
858d36c1 | 622 | path_simplify(p, false); |
61d0578b LP |
623 | |
624 | if (source) { | |
625 | s = strdup(source); | |
626 | if (!s) | |
627 | return -ENOMEM; | |
628 | ||
858d36c1 | 629 | path_simplify(s, false); |
61d0578b LP |
630 | } |
631 | ||
632 | c[(*n_changes)++] = (PortableChange) { | |
633 | .type = type, | |
634 | .path = TAKE_PTR(p), | |
635 | .source = TAKE_PTR(s), | |
636 | }; | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
641 | static int portable_changes_add_with_prefix( | |
642 | PortableChange **changes, | |
643 | size_t *n_changes, | |
644 | PortableChangeType type, | |
645 | const char *prefix, | |
646 | const char *path, | |
647 | const char *source) { | |
648 | ||
649 | assert(path); | |
650 | assert(!changes == !n_changes); | |
651 | ||
652 | if (!changes) | |
653 | return 0; | |
654 | ||
655 | if (prefix) { | |
656 | path = strjoina(prefix, "/", path); | |
657 | ||
658 | if (source) | |
659 | source = strjoina(prefix, "/", source); | |
660 | } | |
661 | ||
662 | return portable_changes_add(changes, n_changes, type, path, source); | |
663 | } | |
664 | ||
665 | void portable_changes_free(PortableChange *changes, size_t n_changes) { | |
666 | size_t i; | |
667 | ||
668 | assert(changes || n_changes == 0); | |
669 | ||
670 | for (i = 0; i < n_changes; i++) { | |
671 | free(changes[i].path); | |
672 | free(changes[i].source); | |
673 | } | |
674 | ||
675 | free(changes); | |
676 | } | |
677 | ||
678 | static int install_chroot_dropin( | |
679 | const char *image_path, | |
680 | ImageType type, | |
681 | const PortableMetadata *m, | |
682 | const char *dropin_dir, | |
683 | char **ret_dropin, | |
684 | PortableChange **changes, | |
685 | size_t *n_changes) { | |
686 | ||
687 | _cleanup_free_ char *text = NULL, *dropin = NULL; | |
688 | int r; | |
689 | ||
690 | assert(image_path); | |
691 | assert(m); | |
692 | assert(dropin_dir); | |
693 | ||
694 | dropin = strjoin(dropin_dir, "/20-portable.conf"); | |
695 | if (!dropin) | |
696 | return -ENOMEM; | |
697 | ||
698 | text = strjoin(PORTABLE_DROPIN_MARKER_BEGIN, image_path, PORTABLE_DROPIN_MARKER_END "\n"); | |
699 | if (!text) | |
700 | return -ENOMEM; | |
701 | ||
702 | if (endswith(m->name, ".service")) | |
703 | if (!strextend(&text, | |
704 | "\n" | |
705 | "[Service]\n", | |
706 | IN_SET(type, IMAGE_DIRECTORY, IMAGE_SUBVOLUME) ? "RootDirectory=" : "RootImage=", image_path, "\n" | |
707 | "Environment=PORTABLE=", basename(image_path), "\n" | |
708 | "LogExtraFields=PORTABLE=", basename(image_path), "\n", | |
709 | NULL)) | |
710 | ||
711 | return -ENOMEM; | |
712 | ||
713 | r = write_string_file(dropin, text, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC); | |
714 | if (r < 0) | |
715 | return log_debug_errno(r, "Failed to write '%s': %m", dropin); | |
716 | ||
717 | (void) portable_changes_add(changes, n_changes, PORTABLE_WRITE, dropin, NULL); | |
718 | ||
719 | if (ret_dropin) | |
720 | *ret_dropin = TAKE_PTR(dropin); | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static int find_profile(const char *name, const char *unit, char **ret) { | |
726 | const char *p, *dot; | |
727 | ||
728 | assert(name); | |
729 | assert(ret); | |
730 | ||
731 | assert_se(dot = strrchr(unit, '.')); | |
732 | ||
733 | NULSTR_FOREACH(p, profile_dirs) { | |
734 | _cleanup_free_ char *joined; | |
735 | ||
736 | joined = strjoin(p, "/", name, "/", dot + 1, ".conf"); | |
737 | if (!joined) | |
738 | return -ENOMEM; | |
739 | ||
740 | if (laccess(joined, F_OK) >= 0) { | |
741 | *ret = TAKE_PTR(joined); | |
742 | return 0; | |
743 | } | |
744 | ||
745 | if (errno != ENOENT) | |
746 | return -errno; | |
747 | } | |
748 | ||
749 | return -ENOENT; | |
750 | } | |
751 | ||
752 | static int install_profile_dropin( | |
753 | const char *image_path, | |
754 | const PortableMetadata *m, | |
755 | const char *dropin_dir, | |
756 | const char *profile, | |
757 | PortableFlags flags, | |
758 | char **ret_dropin, | |
759 | PortableChange **changes, | |
760 | size_t *n_changes) { | |
761 | ||
762 | _cleanup_free_ char *dropin = NULL, *from = NULL; | |
763 | int r; | |
764 | ||
765 | assert(image_path); | |
766 | assert(m); | |
767 | assert(dropin_dir); | |
768 | ||
769 | if (!profile) | |
770 | return 0; | |
771 | ||
772 | r = find_profile(profile, m->name, &from); | |
773 | if (r < 0) { | |
99c89da0 | 774 | if (r != -ENOENT) |
61d0578b LP |
775 | return log_debug_errno(errno, "Profile '%s' is not accessible: %m", profile); |
776 | ||
777 | log_debug_errno(errno, "Skipping link to profile '%s', as it does not exist: %m", profile); | |
778 | return 0; | |
779 | } | |
780 | ||
781 | dropin = strjoin(dropin_dir, "/10-profile.conf"); | |
782 | if (!dropin) | |
783 | return -ENOMEM; | |
784 | ||
785 | if (flags & PORTABLE_PREFER_COPY) { | |
786 | ||
8a016c74 | 787 | r = copy_file_atomic(from, dropin, 0644, 0, 0, COPY_REFLINK); |
61d0578b | 788 | if (r < 0) |
9a6f746f | 789 | return log_debug_errno(r, "Failed to copy %s %s %s: %m", from, special_glyph(SPECIAL_GLYPH_ARROW), dropin); |
61d0578b LP |
790 | |
791 | (void) portable_changes_add(changes, n_changes, PORTABLE_COPY, dropin, from); | |
792 | ||
793 | } else { | |
794 | ||
795 | if (symlink(from, dropin) < 0) | |
9a6f746f | 796 | return log_debug_errno(errno, "Failed to link %s %s %s: %m", from, special_glyph(SPECIAL_GLYPH_ARROW), dropin); |
61d0578b LP |
797 | |
798 | (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, dropin, from); | |
799 | } | |
800 | ||
801 | if (ret_dropin) | |
802 | *ret_dropin = TAKE_PTR(dropin); | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
40a7b232 | 807 | static const char *attached_path(const LookupPaths *paths, PortableFlags flags) { |
61d0578b LP |
808 | const char *where; |
809 | ||
810 | assert(paths); | |
811 | ||
812 | if (flags & PORTABLE_RUNTIME) | |
40a7b232 | 813 | where = paths->runtime_attached; |
61d0578b | 814 | else |
40a7b232 | 815 | where = paths->persistent_attached; |
61d0578b LP |
816 | |
817 | assert(where); | |
818 | return where; | |
819 | } | |
820 | ||
821 | static int attach_unit_file( | |
822 | const LookupPaths *paths, | |
823 | const char *image_path, | |
824 | ImageType type, | |
825 | const PortableMetadata *m, | |
826 | const char *profile, | |
827 | PortableFlags flags, | |
828 | PortableChange **changes, | |
829 | size_t *n_changes) { | |
830 | ||
831 | _cleanup_(unlink_and_freep) char *chroot_dropin = NULL, *profile_dropin = NULL; | |
832 | _cleanup_(rmdir_and_freep) char *dropin_dir = NULL; | |
833 | const char *where, *path; | |
834 | int r; | |
835 | ||
836 | assert(paths); | |
837 | assert(image_path); | |
838 | assert(m); | |
839 | assert(PORTABLE_METADATA_IS_UNIT(m)); | |
840 | ||
40a7b232 | 841 | where = attached_path(paths, flags); |
61d0578b | 842 | |
d09d85a2 LP |
843 | (void) mkdir_parents(where, 0755); |
844 | if (mkdir(where, 0755) < 0) { | |
845 | if (errno != EEXIST) | |
846 | return -errno; | |
847 | } else | |
848 | (void) portable_changes_add(changes, n_changes, PORTABLE_MKDIR, where, NULL); | |
849 | ||
850 | path = strjoina(where, "/", m->name); | |
61d0578b LP |
851 | dropin_dir = strjoin(path, ".d"); |
852 | if (!dropin_dir) | |
853 | return -ENOMEM; | |
854 | ||
d09d85a2 LP |
855 | if (mkdir(dropin_dir, 0755) < 0) { |
856 | if (errno != EEXIST) | |
857 | return -errno; | |
858 | } else | |
859 | (void) portable_changes_add(changes, n_changes, PORTABLE_MKDIR, dropin_dir, NULL); | |
61d0578b LP |
860 | |
861 | /* We install the drop-ins first, and the actual unit file last to achieve somewhat atomic behaviour if PID 1 | |
862 | * is reloaded while we are creating things here: as long as only the drop-ins exist the unit doesn't exist at | |
863 | * all for PID 1. */ | |
864 | ||
865 | r = install_chroot_dropin(image_path, type, m, dropin_dir, &chroot_dropin, changes, n_changes); | |
866 | if (r < 0) | |
867 | return r; | |
868 | ||
869 | r = install_profile_dropin(image_path, m, dropin_dir, profile, flags, &profile_dropin, changes, n_changes); | |
870 | if (r < 0) | |
871 | return r; | |
872 | ||
873 | if ((flags & PORTABLE_PREFER_SYMLINK) && m->source) { | |
874 | ||
875 | if (symlink(m->source, path) < 0) | |
876 | return log_debug_errno(errno, "Failed to symlink unit file '%s': %m", path); | |
877 | ||
878 | (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, path, m->source); | |
879 | ||
880 | } else { | |
881 | _cleanup_(unlink_and_freep) char *tmp = NULL; | |
882 | _cleanup_close_ int fd = -1; | |
883 | ||
884 | fd = open_tmpfile_linkable(where, O_WRONLY|O_CLOEXEC, &tmp); | |
885 | if (fd < 0) | |
886 | return log_debug_errno(fd, "Failed to create unit file '%s': %m", path); | |
887 | ||
888 | r = copy_bytes(m->fd, fd, UINT64_MAX, COPY_REFLINK); | |
889 | if (r < 0) | |
890 | return log_debug_errno(r, "Failed to copy unit file '%s': %m", path); | |
891 | ||
892 | if (fchmod(fd, 0644) < 0) | |
893 | return log_debug_errno(errno, "Failed to change unit file access mode for '%s': %m", path); | |
894 | ||
895 | r = link_tmpfile(fd, tmp, path); | |
896 | if (r < 0) | |
897 | return log_debug_errno(r, "Failed to install unit file '%s': %m", path); | |
898 | ||
899 | tmp = mfree(tmp); | |
900 | ||
901 | (void) portable_changes_add(changes, n_changes, PORTABLE_COPY, path, m->source); | |
902 | } | |
903 | ||
904 | /* All is established now, now let's disable any rollbacks */ | |
905 | chroot_dropin = mfree(chroot_dropin); | |
906 | profile_dropin = mfree(profile_dropin); | |
907 | dropin_dir = mfree(dropin_dir); | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | static int image_symlink( | |
913 | const char *image_path, | |
914 | PortableFlags flags, | |
915 | char **ret) { | |
916 | ||
917 | const char *fn, *where; | |
918 | char *joined = NULL; | |
919 | ||
920 | assert(image_path); | |
921 | assert(ret); | |
922 | ||
923 | fn = last_path_component(image_path); | |
924 | ||
925 | if (flags & PORTABLE_RUNTIME) | |
926 | where = "/run/portables/"; | |
927 | else | |
928 | where = "/etc/portables/"; | |
929 | ||
930 | joined = strjoin(where, fn); | |
931 | if (!joined) | |
932 | return -ENOMEM; | |
933 | ||
934 | *ret = joined; | |
935 | return 0; | |
936 | } | |
937 | ||
938 | static int install_image_symlink( | |
939 | const char *image_path, | |
940 | PortableFlags flags, | |
941 | PortableChange **changes, | |
942 | size_t *n_changes) { | |
943 | ||
944 | _cleanup_free_ char *sl = NULL; | |
945 | int r; | |
946 | ||
947 | assert(image_path); | |
948 | ||
949 | /* If the image is outside of the image search also link it into it, so that it can be found with short image | |
950 | * names and is listed among the images. */ | |
951 | ||
952 | if (image_in_search_path(IMAGE_PORTABLE, image_path)) | |
953 | return 0; | |
954 | ||
955 | r = image_symlink(image_path, flags, &sl); | |
956 | if (r < 0) | |
957 | return log_debug_errno(r, "Failed to generate image symlink path: %m"); | |
958 | ||
959 | (void) mkdir_parents(sl, 0755); | |
960 | ||
961 | if (symlink(image_path, sl) < 0) | |
9a6f746f | 962 | return log_debug_errno(errno, "Failed to link %s %s %s: %m", image_path, special_glyph(SPECIAL_GLYPH_ARROW), sl); |
61d0578b LP |
963 | |
964 | (void) portable_changes_add(changes, n_changes, PORTABLE_SYMLINK, sl, image_path); | |
965 | return 0; | |
966 | } | |
967 | ||
968 | int portable_attach( | |
969 | sd_bus *bus, | |
970 | const char *name_or_path, | |
971 | char **matches, | |
972 | const char *profile, | |
973 | PortableFlags flags, | |
974 | PortableChange **changes, | |
975 | size_t *n_changes, | |
976 | sd_bus_error *error) { | |
977 | ||
67818055 | 978 | _cleanup_hashmap_free_ Hashmap *unit_files = NULL; |
61d0578b LP |
979 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; |
980 | _cleanup_(image_unrefp) Image *image = NULL; | |
981 | PortableMetadata *item; | |
982 | Iterator iterator; | |
983 | int r; | |
984 | ||
985 | assert(name_or_path); | |
986 | ||
987 | r = image_find_harder(IMAGE_PORTABLE, name_or_path, &image); | |
988 | if (r < 0) | |
989 | return r; | |
990 | ||
991 | r = portable_extract_by_path(image->path, matches, NULL, &unit_files, error); | |
992 | if (r < 0) | |
993 | return r; | |
994 | ||
995 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL); | |
996 | if (r < 0) | |
997 | return r; | |
998 | ||
999 | HASHMAP_FOREACH(item, unit_files, iterator) { | |
1000 | r = unit_file_exists(UNIT_FILE_SYSTEM, &paths, item->name); | |
1001 | if (r < 0) | |
1002 | return sd_bus_error_set_errnof(error, r, "Failed to determine whether unit '%s' exists on the host: %m", item->name); | |
1003 | if (r > 0) | |
1004 | return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' exists on the host already, refusing.", item->name); | |
1005 | ||
1006 | r = unit_file_is_active(bus, item->name, error); | |
1007 | if (r < 0) | |
1008 | return r; | |
1009 | if (r > 0) | |
1010 | return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' is active already, refusing.", item->name); | |
1011 | } | |
1012 | ||
1013 | HASHMAP_FOREACH(item, unit_files, iterator) { | |
1014 | r = attach_unit_file(&paths, image->path, image->type, item, profile, flags, changes, n_changes); | |
1015 | if (r < 0) | |
1016 | return r; | |
1017 | } | |
1018 | ||
1019 | /* We don't care too much for the image symlink, it's just a convenience thing, it's not necessary for proper | |
1020 | * operation otherwise. */ | |
1021 | (void) install_image_symlink(image->path, flags, changes, n_changes); | |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static bool marker_matches_image(const char *marker, const char *name_or_path) { | |
1027 | const char *a; | |
1028 | ||
1029 | assert(marker); | |
1030 | assert(name_or_path); | |
1031 | ||
1032 | a = last_path_component(marker); | |
1033 | ||
1034 | if (image_name_is_valid(name_or_path)) { | |
1035 | const char *e; | |
1036 | ||
1037 | /* We shall match against an image name. In that case let's compare the last component, and optionally | |
1038 | * allow either a suffix of ".raw" or a series of "/". */ | |
1039 | ||
1040 | e = startswith(a, name_or_path); | |
1041 | if (!e) | |
1042 | return false; | |
1043 | ||
1044 | return | |
1045 | e[strspn(e, "/")] == 0 || | |
1046 | streq(e, ".raw"); | |
1047 | } else { | |
1048 | const char *b; | |
1049 | size_t l; | |
1050 | ||
1051 | /* We shall match against a path. Let's ignore any prefix here though, as often there are many ways to | |
1052 | * reach the same file. However, in this mode, let's validate any file suffix. */ | |
1053 | ||
1054 | l = strcspn(a, "/"); | |
1055 | b = last_path_component(name_or_path); | |
1056 | ||
1057 | if (strcspn(b, "/") != l) | |
1058 | return false; | |
1059 | ||
1060 | return memcmp(a, b, l) == 0; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | static int test_chroot_dropin( | |
1065 | DIR *d, | |
1066 | const char *where, | |
1067 | const char *fname, | |
1068 | const char *name_or_path, | |
1069 | char **ret_marker) { | |
1070 | ||
1071 | _cleanup_free_ char *line = NULL, *marker = NULL; | |
1072 | _cleanup_fclose_ FILE *f = NULL; | |
1073 | _cleanup_close_ int fd = -1; | |
1074 | const char *p, *e, *k; | |
1075 | int r; | |
1076 | ||
1077 | assert(d); | |
1078 | assert(where); | |
1079 | assert(fname); | |
1080 | ||
1081 | /* We recognize unis created from portable images via the drop-in we created for them */ | |
1082 | ||
1083 | p = strjoina(fname, ".d/20-portable.conf"); | |
1084 | fd = openat(dirfd(d), p, O_RDONLY|O_CLOEXEC); | |
1085 | if (fd < 0) { | |
1086 | if (errno == ENOENT) | |
1087 | return 0; | |
1088 | ||
1089 | return log_debug_errno(errno, "Failed to open %s/%s: %m", where, p); | |
1090 | } | |
1091 | ||
02e23d1a ZJS |
1092 | r = fdopen_unlocked(fd, "r", &f); |
1093 | if (r < 0) | |
1094 | return log_debug_errno(r, "Failed to convert file handle: %m"); | |
1095 | TAKE_FD(fd); | |
61d0578b LP |
1096 | |
1097 | r = read_line(f, LONG_LINE_MAX, &line); | |
1098 | if (r < 0) | |
1099 | return log_debug_errno(r, "Failed to read from %s/%s: %m", where, p); | |
1100 | ||
1101 | e = startswith(line, PORTABLE_DROPIN_MARKER_BEGIN); | |
1102 | if (!e) | |
1103 | return 0; | |
1104 | ||
1105 | k = endswith(e, PORTABLE_DROPIN_MARKER_END); | |
1106 | if (!k) | |
1107 | return 0; | |
1108 | ||
1109 | marker = strndup(e, k - e); | |
1110 | if (!marker) | |
1111 | return -ENOMEM; | |
1112 | ||
1113 | if (!name_or_path) | |
1114 | r = true; | |
1115 | else | |
1116 | r = marker_matches_image(marker, name_or_path); | |
1117 | ||
1118 | if (ret_marker) | |
1119 | *ret_marker = TAKE_PTR(marker); | |
1120 | ||
1121 | return r; | |
1122 | } | |
1123 | ||
1124 | int portable_detach( | |
1125 | sd_bus *bus, | |
1126 | const char *name_or_path, | |
1127 | PortableFlags flags, | |
1128 | PortableChange **changes, | |
1129 | size_t *n_changes, | |
1130 | sd_bus_error *error) { | |
1131 | ||
1132 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; | |
1133 | _cleanup_set_free_free_ Set *unit_files = NULL, *markers = NULL; | |
1134 | _cleanup_closedir_ DIR *d = NULL; | |
1135 | const char *where, *item; | |
1136 | Iterator iterator; | |
1137 | struct dirent *de; | |
1138 | int ret = 0; | |
1139 | int r; | |
1140 | ||
1141 | assert(name_or_path); | |
1142 | ||
1143 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL); | |
1144 | if (r < 0) | |
1145 | return r; | |
1146 | ||
40a7b232 | 1147 | where = attached_path(&paths, flags); |
61d0578b LP |
1148 | |
1149 | d = opendir(where); | |
339731db LP |
1150 | if (!d) { |
1151 | if (errno == ENOENT) | |
1152 | goto not_found; | |
1153 | ||
61d0578b | 1154 | return log_debug_errno(errno, "Failed to open '%s' directory: %m", where); |
339731db | 1155 | } |
61d0578b LP |
1156 | |
1157 | unit_files = set_new(&string_hash_ops); | |
1158 | if (!unit_files) | |
1159 | return -ENOMEM; | |
1160 | ||
1161 | markers = set_new(&path_hash_ops); | |
1162 | if (!markers) | |
1163 | return -ENOMEM; | |
1164 | ||
1165 | FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to enumerate '%s' directory: %m", where)) { | |
1166 | _cleanup_free_ char *marker = NULL; | |
1167 | UnitFileState state; | |
1168 | ||
1169 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
1170 | continue; | |
1171 | ||
1172 | /* Filter out duplicates */ | |
1173 | if (set_get(unit_files, de->d_name)) | |
1174 | continue; | |
1175 | ||
1176 | dirent_ensure_type(d, de); | |
1177 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
1178 | continue; | |
1179 | ||
1180 | r = test_chroot_dropin(d, where, de->d_name, name_or_path, &marker); | |
1181 | if (r < 0) | |
1182 | return r; | |
1183 | if (r == 0) | |
1184 | continue; | |
1185 | ||
1186 | r = unit_file_lookup_state(UNIT_FILE_SYSTEM, &paths, de->d_name, &state); | |
1187 | if (r < 0) | |
1188 | return log_debug_errno(r, "Failed to determine unit file state of '%s': %m", de->d_name); | |
1189 | if (!IN_SET(state, UNIT_FILE_STATIC, UNIT_FILE_DISABLED, UNIT_FILE_LINKED, UNIT_FILE_RUNTIME)) | |
1190 | 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)); | |
1191 | ||
1192 | r = unit_file_is_active(bus, de->d_name, error); | |
1193 | if (r < 0) | |
1194 | return r; | |
1195 | if (r > 0) | |
1196 | return sd_bus_error_setf(error, BUS_ERROR_UNIT_EXISTS, "Unit file '%s' is active, can't detach.", de->d_name); | |
1197 | ||
1198 | r = set_put_strdup(unit_files, de->d_name); | |
1199 | if (r < 0) | |
1200 | return log_debug_errno(r, "Failed to add unit name '%s' to set: %m", de->d_name); | |
1201 | ||
1202 | if (path_is_absolute(marker) && | |
1203 | !image_in_search_path(IMAGE_PORTABLE, marker)) { | |
1204 | ||
1205 | r = set_ensure_allocated(&markers, &path_hash_ops); | |
1206 | if (r < 0) | |
1207 | return r; | |
1208 | ||
1209 | r = set_put(markers, marker); | |
1210 | if (r >= 0) | |
1211 | marker = NULL; | |
1212 | else if (r != -EEXIST) | |
1213 | return r; | |
1214 | } | |
1215 | } | |
1216 | ||
339731db LP |
1217 | if (set_isempty(unit_files)) |
1218 | goto not_found; | |
61d0578b LP |
1219 | |
1220 | SET_FOREACH(item, unit_files, iterator) { | |
1221 | _cleanup_free_ char *md = NULL; | |
1222 | const char *suffix; | |
1223 | ||
1224 | if (unlinkat(dirfd(d), item, 0) < 0) { | |
1225 | log_debug_errno(errno, "Can't remove unit file %s/%s: %m", where, item); | |
1226 | ||
1227 | if (errno != ENOENT && ret >= 0) | |
1228 | ret = -errno; | |
1229 | } else | |
1230 | portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, item, NULL); | |
1231 | ||
1232 | FOREACH_STRING(suffix, ".d/10-profile.conf", ".d/20-portable.conf") { | |
1233 | _cleanup_free_ char *dropin = NULL; | |
1234 | ||
1235 | dropin = strjoin(item, suffix); | |
1236 | if (!dropin) | |
1237 | return -ENOMEM; | |
1238 | ||
1239 | if (unlinkat(dirfd(d), dropin, 0) < 0) { | |
1240 | log_debug_errno(errno, "Can't remove drop-in %s/%s: %m", where, dropin); | |
1241 | ||
1242 | if (errno != ENOENT && ret >= 0) | |
1243 | ret = -errno; | |
1244 | } else | |
1245 | portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, dropin, NULL); | |
1246 | } | |
1247 | ||
1248 | md = strjoin(item, ".d"); | |
1249 | if (!md) | |
1250 | return -ENOMEM; | |
1251 | ||
1252 | if (unlinkat(dirfd(d), md, AT_REMOVEDIR) < 0) { | |
1253 | log_debug_errno(errno, "Can't remove drop-in directory %s/%s: %m", where, md); | |
1254 | ||
1255 | if (errno != ENOENT && ret >= 0) | |
1256 | ret = -errno; | |
1257 | } else | |
1258 | portable_changes_add_with_prefix(changes, n_changes, PORTABLE_UNLINK, where, md, NULL); | |
1259 | } | |
1260 | ||
1261 | /* Now, also drop any image symlink, for images outside of the sarch path */ | |
1262 | SET_FOREACH(item, markers, iterator) { | |
1263 | _cleanup_free_ char *sl = NULL; | |
1264 | struct stat st; | |
1265 | ||
1266 | r = image_symlink(item, flags, &sl); | |
1267 | if (r < 0) { | |
1268 | log_debug_errno(r, "Failed to determine image symlink for '%s', ignoring: %m", item); | |
1269 | continue; | |
1270 | } | |
1271 | ||
1272 | if (lstat(sl, &st) < 0) { | |
1273 | log_debug_errno(errno, "Failed to stat '%s', ignoring: %m", sl); | |
1274 | continue; | |
1275 | } | |
1276 | ||
1277 | if (!S_ISLNK(st.st_mode)) { | |
1278 | log_debug("Image '%s' is not a symlink, ignoring.", sl); | |
1279 | continue; | |
1280 | } | |
1281 | ||
1282 | if (unlink(sl) < 0) { | |
1283 | log_debug_errno(errno, "Can't remove image symlink '%s': %m", sl); | |
1284 | ||
1285 | if (errno != ENOENT && ret >= 0) | |
1286 | ret = -errno; | |
1287 | } else | |
1288 | portable_changes_add(changes, n_changes, PORTABLE_UNLINK, sl, NULL); | |
1289 | } | |
1290 | ||
d09d85a2 LP |
1291 | /* Try to remove the unit file directory, if we can */ |
1292 | if (rmdir(where) >= 0) | |
1293 | portable_changes_add(changes, n_changes, PORTABLE_UNLINK, where, NULL); | |
1294 | ||
61d0578b | 1295 | return ret; |
339731db LP |
1296 | |
1297 | not_found: | |
1298 | log_debug("No unit files associated with '%s' found. Image not attached?", name_or_path); | |
1299 | 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 |
1300 | } |
1301 | ||
1302 | static int portable_get_state_internal( | |
1303 | sd_bus *bus, | |
1304 | const char *name_or_path, | |
1305 | PortableFlags flags, | |
1306 | PortableState *ret, | |
1307 | sd_bus_error *error) { | |
1308 | ||
1309 | _cleanup_(lookup_paths_free) LookupPaths paths = {}; | |
1310 | bool found_enabled = false, found_running = false; | |
1311 | _cleanup_set_free_free_ Set *unit_files = NULL; | |
1312 | _cleanup_closedir_ DIR *d = NULL; | |
1313 | const char *where; | |
1314 | struct dirent *de; | |
1315 | int r; | |
1316 | ||
1317 | assert(name_or_path); | |
1318 | assert(ret); | |
1319 | ||
1320 | r = lookup_paths_init(&paths, UNIT_FILE_SYSTEM, LOOKUP_PATHS_SPLIT_USR, NULL); | |
1321 | if (r < 0) | |
1322 | return r; | |
1323 | ||
40a7b232 | 1324 | where = attached_path(&paths, flags); |
61d0578b LP |
1325 | |
1326 | d = opendir(where); | |
339731db LP |
1327 | if (!d) { |
1328 | if (errno == ENOENT) { | |
1329 | /* If the 'attached' directory doesn't exist at all, then we know for sure this image isn't attached. */ | |
1330 | *ret = PORTABLE_DETACHED; | |
1331 | return 0; | |
1332 | } | |
1333 | ||
61d0578b | 1334 | return log_debug_errno(errno, "Failed to open '%s' directory: %m", where); |
339731db | 1335 | } |
61d0578b LP |
1336 | |
1337 | unit_files = set_new(&string_hash_ops); | |
1338 | if (!unit_files) | |
1339 | return -ENOMEM; | |
1340 | ||
1341 | FOREACH_DIRENT(de, d, return log_debug_errno(errno, "Failed to enumerate '%s' directory: %m", where)) { | |
1342 | UnitFileState state; | |
1343 | ||
1344 | if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY)) | |
1345 | continue; | |
1346 | ||
1347 | /* Filter out duplicates */ | |
1348 | if (set_get(unit_files, de->d_name)) | |
1349 | continue; | |
1350 | ||
1351 | dirent_ensure_type(d, de); | |
1352 | if (!IN_SET(de->d_type, DT_LNK, DT_REG)) | |
1353 | continue; | |
1354 | ||
1355 | r = test_chroot_dropin(d, where, de->d_name, name_or_path, NULL); | |
1356 | if (r < 0) | |
1357 | return r; | |
1358 | if (r == 0) | |
1359 | continue; | |
1360 | ||
1361 | r = unit_file_lookup_state(UNIT_FILE_SYSTEM, &paths, de->d_name, &state); | |
1362 | if (r < 0) | |
1363 | return log_debug_errno(r, "Failed to determine unit file state of '%s': %m", de->d_name); | |
1364 | if (!IN_SET(state, UNIT_FILE_STATIC, UNIT_FILE_DISABLED, UNIT_FILE_LINKED, UNIT_FILE_LINKED_RUNTIME)) | |
1365 | found_enabled = true; | |
1366 | ||
1367 | r = unit_file_is_active(bus, de->d_name, error); | |
1368 | if (r < 0) | |
1369 | return r; | |
1370 | if (r > 0) | |
1371 | found_running = true; | |
1372 | ||
1373 | r = set_put_strdup(unit_files, de->d_name); | |
1374 | if (r < 0) | |
1375 | return log_debug_errno(r, "Failed to add unit name '%s' to set: %m", de->d_name); | |
1376 | } | |
1377 | ||
1378 | *ret = found_running ? (!set_isempty(unit_files) && (flags & PORTABLE_RUNTIME) ? PORTABLE_RUNNING_RUNTIME : PORTABLE_RUNNING) : | |
1379 | found_enabled ? (flags & PORTABLE_RUNTIME ? PORTABLE_ENABLED_RUNTIME : PORTABLE_ENABLED) : | |
1380 | !set_isempty(unit_files) ? (flags & PORTABLE_RUNTIME ? PORTABLE_ATTACHED_RUNTIME : PORTABLE_ATTACHED) : PORTABLE_DETACHED; | |
1381 | ||
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | int portable_get_state( | |
1386 | sd_bus *bus, | |
1387 | const char *name_or_path, | |
1388 | PortableFlags flags, | |
1389 | PortableState *ret, | |
1390 | sd_bus_error *error) { | |
1391 | ||
1392 | PortableState state; | |
1393 | int r; | |
1394 | ||
1395 | assert(name_or_path); | |
1396 | assert(ret); | |
1397 | ||
1398 | /* We look for matching units twice: once in the regular directories, and once in the runtime directories — but | |
1399 | * the latter only if we didn't find anything in the former. */ | |
1400 | ||
1401 | r = portable_get_state_internal(bus, name_or_path, flags & ~PORTABLE_RUNTIME, &state, error); | |
1402 | if (r < 0) | |
1403 | return r; | |
1404 | ||
1405 | if (state == PORTABLE_DETACHED) { | |
1406 | r = portable_get_state_internal(bus, name_or_path, flags | PORTABLE_RUNTIME, &state, error); | |
1407 | if (r < 0) | |
1408 | return r; | |
1409 | } | |
1410 | ||
1411 | *ret = state; | |
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | int portable_get_profiles(char ***ret) { | |
1416 | assert(ret); | |
1417 | ||
1418 | return conf_files_list_nulstr(ret, NULL, NULL, CONF_FILES_DIRECTORY|CONF_FILES_BASENAME|CONF_FILES_FILTER_MASKED, profile_dirs); | |
1419 | } | |
1420 | ||
1421 | static const char* const portable_change_type_table[_PORTABLE_CHANGE_TYPE_MAX] = { | |
1422 | [PORTABLE_COPY] = "copy", | |
1423 | [PORTABLE_MKDIR] = "mkdir", | |
1424 | [PORTABLE_SYMLINK] = "symlink", | |
1425 | [PORTABLE_UNLINK] = "unlink", | |
1426 | [PORTABLE_WRITE] = "write", | |
1427 | }; | |
1428 | ||
1429 | DEFINE_STRING_TABLE_LOOKUP(portable_change_type, PortableChangeType); | |
1430 | ||
1431 | static const char* const portable_state_table[_PORTABLE_STATE_MAX] = { | |
1432 | [PORTABLE_DETACHED] = "detached", | |
1433 | [PORTABLE_ATTACHED] = "attached", | |
1434 | [PORTABLE_ATTACHED_RUNTIME] = "attached-runtime", | |
1435 | [PORTABLE_ENABLED] = "enabled", | |
1436 | [PORTABLE_ENABLED_RUNTIME] = "enabled-runtime", | |
1437 | [PORTABLE_RUNNING] = "running", | |
1438 | [PORTABLE_RUNNING_RUNTIME] = "running-runtime", | |
1439 | }; | |
1440 | ||
1441 | DEFINE_STRING_TABLE_LOOKUP(portable_state, PortableState); |