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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2015 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <sys/prctl.h> | |
23 | ||
24 | #include "sd-bus.h" | |
25 | #include "util.h" | |
26 | #include "strv.h" | |
27 | #include "bus-util.h" | |
28 | #include "bus-common-errors.h" | |
29 | #include "def.h" | |
30 | #include "import-util.h" | |
31 | ||
32 | typedef struct Transfer Transfer; | |
33 | typedef struct Manager Manager; | |
34 | ||
35 | typedef enum TransferType { | |
36 | TRANSFER_TAR, | |
37 | TRANSFER_RAW, | |
38 | TRANSFER_DKR, | |
39 | _TRANSFER_TYPE_MAX, | |
40 | _TRANSFER_TYPE_INVALID = -1, | |
41 | } TransferType; | |
42 | ||
43 | struct Transfer { | |
44 | Manager *manager; | |
45 | ||
46 | uint32_t id; | |
47 | char *object_path; | |
48 | ||
49 | TransferType type; | |
50 | ImportVerify verify; | |
51 | ||
52 | char *remote; | |
53 | char *local; | |
54 | bool force_local; | |
55 | ||
56 | char *dkr_index_url; | |
57 | ||
58 | pid_t pid; | |
59 | ||
60 | int log_fd; | |
61 | ||
62 | char log_message[LINE_MAX]; | |
63 | size_t log_message_size; | |
64 | ||
65 | sd_event_source *pid_event_source; | |
66 | sd_event_source *log_event_source; | |
67 | ||
68 | unsigned n_canceled; | |
69 | }; | |
70 | ||
71 | struct Manager { | |
72 | sd_event *event; | |
73 | sd_bus *bus; | |
74 | ||
75 | uint32_t current_transfer_id; | |
76 | Hashmap *transfers; | |
77 | ||
78 | Hashmap *polkit_registry; | |
79 | }; | |
80 | ||
81 | #define TRANSFERS_MAX 64 | |
82 | ||
83 | static const char* const transfer_type_table[_TRANSFER_TYPE_MAX] = { | |
84 | [TRANSFER_TAR] = "tar", | |
85 | [TRANSFER_RAW] = "raw", | |
86 | [TRANSFER_DKR] = "dkr", | |
87 | }; | |
88 | ||
b9a5f858 | 89 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(transfer_type, TransferType); |
3d7415f4 LP |
90 | |
91 | static Transfer *transfer_unref(Transfer *t) { | |
92 | if (!t) | |
93 | return NULL; | |
94 | ||
95 | if (t->manager) | |
96 | hashmap_remove(t->manager->transfers, UINT32_TO_PTR(t->id)); | |
97 | ||
98 | sd_event_source_unref(t->pid_event_source); | |
99 | sd_event_source_unref(t->log_event_source); | |
100 | ||
101 | free(t->remote); | |
102 | free(t->local); | |
103 | free(t->dkr_index_url); | |
104 | free(t->object_path); | |
105 | ||
106 | if (t->pid > 0) { | |
107 | (void) kill_and_sigcont(t->pid, SIGKILL); | |
108 | (void) wait_for_terminate(t->pid, NULL); | |
109 | } | |
110 | ||
111 | safe_close(t->log_fd); | |
112 | ||
113 | free(t); | |
114 | return NULL; | |
115 | } | |
116 | ||
117 | DEFINE_TRIVIAL_CLEANUP_FUNC(Transfer*, transfer_unref); | |
118 | ||
119 | static int transfer_new(Manager *m, Transfer **ret) { | |
120 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
121 | uint32_t id; | |
122 | int r; | |
123 | ||
124 | assert(m); | |
125 | assert(ret); | |
126 | ||
127 | if (hashmap_size(m->transfers) >= TRANSFERS_MAX) | |
128 | return -E2BIG; | |
129 | ||
130 | r = hashmap_ensure_allocated(&m->transfers, &trivial_hash_ops); | |
131 | if (r < 0) | |
132 | return r; | |
133 | ||
134 | t = new0(Transfer, 1); | |
135 | if (!t) | |
136 | return -ENOMEM; | |
137 | ||
138 | t->type = _TRANSFER_TYPE_INVALID; | |
139 | t->log_fd = -1; | |
140 | ||
141 | id = m->current_transfer_id + 1; | |
142 | ||
143 | if (asprintf(&t->object_path, "/org/freedesktop/import1/transfer/_%" PRIu32, id) < 0) | |
144 | return -ENOMEM; | |
145 | ||
146 | r = hashmap_put(m->transfers, UINT32_TO_PTR(id), t); | |
147 | if (r < 0) | |
148 | return r; | |
149 | ||
150 | m->current_transfer_id = id; | |
151 | ||
152 | t->manager = m; | |
153 | t->id = id; | |
154 | ||
155 | *ret = t; | |
156 | t = NULL; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static void transfer_send_log_line(Transfer *t, const char *line) { | |
162 | int r, priority = LOG_INFO; | |
163 | ||
164 | assert(t); | |
165 | assert(line); | |
166 | ||
167 | syslog_parse_priority(&line, &priority, true); | |
168 | ||
09d46cfd | 169 | log_full(priority, "(transfer%" PRIu32 ") %s", t->id, line); |
3d7415f4 LP |
170 | |
171 | r = sd_bus_emit_signal( | |
172 | t->manager->bus, | |
173 | t->object_path, | |
174 | "org.freedesktop.import1.Transfer", | |
175 | "LogMessage", | |
176 | "us", | |
177 | priority, | |
178 | line); | |
179 | if (r < 0) | |
180 | log_error_errno(r, "Cannot emit message: %m"); | |
181 | } | |
182 | ||
183 | static void transfer_send_logs(Transfer *t, bool flush) { | |
184 | assert(t); | |
185 | ||
186 | /* Try to send out all log messages, if we can. But if we | |
187 | * can't we remove the messages from the buffer, but don't | |
188 | * fail */ | |
189 | ||
190 | while (t->log_message_size > 0) { | |
191 | _cleanup_free_ char *n = NULL; | |
192 | char *e; | |
193 | ||
194 | if (t->log_message_size >= sizeof(t->log_message)) | |
195 | e = t->log_message + sizeof(t->log_message); | |
196 | else { | |
197 | char *a, *b; | |
198 | ||
199 | a = memchr(t->log_message, 0, t->log_message_size); | |
200 | b = memchr(t->log_message, '\n', t->log_message_size); | |
201 | ||
202 | if (a && b) | |
203 | e = a < b ? a : b; | |
204 | else if (a) | |
205 | e = a; | |
206 | else | |
207 | e = b; | |
208 | } | |
209 | ||
210 | if (!e) { | |
211 | if (!flush) | |
212 | return; | |
213 | ||
214 | e = t->log_message + t->log_message_size; | |
215 | } | |
216 | ||
217 | n = strndup(t->log_message, e - t->log_message); | |
218 | ||
219 | /* Skip over NUL and newlines */ | |
220 | while (e < t->log_message + t->log_message_size && (*e == 0 || *e == '\n')) | |
221 | e++; | |
222 | ||
223 | memmove(t->log_message, e, t->log_message + sizeof(t->log_message) - e); | |
224 | t->log_message_size -= e - t->log_message; | |
225 | ||
226 | if (!n) { | |
227 | log_oom(); | |
228 | continue; | |
229 | } | |
230 | ||
231 | if (isempty(n)) | |
232 | continue; | |
233 | ||
234 | transfer_send_log_line(t, n); | |
235 | } | |
236 | } | |
237 | ||
238 | static int transfer_finalize(Transfer *t, bool success) { | |
239 | int r; | |
240 | ||
241 | assert(t); | |
242 | ||
243 | transfer_send_logs(t, true); | |
244 | ||
245 | r = sd_bus_emit_signal( | |
246 | t->manager->bus, | |
247 | "/org/freedesktop/import1", | |
248 | "org.freedesktop.import1.Manager", | |
249 | "TransferRemoved", | |
250 | "uos", | |
251 | t->id, | |
252 | t->object_path, | |
253 | success ? "done" : | |
254 | t->n_canceled > 0 ? "canceled" : "failed"); | |
255 | ||
256 | if (r < 0) | |
257 | log_error_errno(r, "Cannot emit message: %m"); | |
258 | ||
259 | transfer_unref(t); | |
260 | return 0; | |
261 | } | |
262 | ||
263 | static int transfer_cancel(Transfer *t) { | |
264 | int r; | |
265 | ||
266 | assert(t); | |
267 | ||
268 | r = kill_and_sigcont(t->pid, t->n_canceled < 3 ? SIGTERM : SIGKILL); | |
269 | if (r < 0) | |
270 | return r; | |
271 | ||
272 | t->n_canceled++; | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static int transfer_on_pid(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
277 | Transfer *t = userdata; | |
278 | bool success = false; | |
279 | ||
280 | assert(s); | |
281 | assert(t); | |
282 | ||
283 | if (si->si_code == CLD_EXITED) { | |
284 | if (si->si_status != 0) | |
285 | log_error("Import process failed with exit code %i.", si->si_status); | |
286 | else { | |
287 | log_debug("Import process succeeded."); | |
288 | success = true; | |
289 | } | |
290 | ||
291 | } else if (si->si_code == CLD_KILLED || | |
292 | si->si_code == CLD_DUMPED) | |
293 | ||
294 | log_error("Import process terminated by signal %s.", signal_to_string(si->si_status)); | |
295 | else | |
296 | log_error("Import process failed due to unknown reason."); | |
297 | ||
298 | t->pid = 0; | |
299 | ||
300 | return transfer_finalize(t, success); | |
301 | } | |
302 | ||
303 | static int transfer_on_log(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
304 | Transfer *t = userdata; | |
305 | ssize_t l; | |
306 | ||
307 | assert(s); | |
308 | assert(t); | |
309 | ||
310 | l = read(fd, t->log_message + t->log_message_size, sizeof(t->log_message) - t->log_message_size); | |
311 | if (l <= 0) { | |
312 | /* EOF/read error. We just close the pipe here, and | |
313 | * close the watch, waiting for the SIGCHLD to arrive, | |
314 | * before we do anything else. */ | |
315 | ||
316 | if (l < 0) | |
317 | log_error_errno(errno, "Failed to read log message: %m"); | |
318 | ||
319 | t->log_event_source = sd_event_source_unref(t->log_event_source); | |
320 | return 0; | |
321 | } | |
322 | ||
323 | t->log_message_size += l; | |
324 | ||
325 | transfer_send_logs(t, false); | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | static int transfer_start(Transfer *t) { | |
331 | _cleanup_close_pair_ int pipefd[2] = { -1, -1 }; | |
332 | int r; | |
333 | ||
334 | assert(t); | |
335 | assert(t->pid <= 0); | |
336 | ||
337 | if (pipe2(pipefd, O_CLOEXEC) < 0) | |
338 | return -errno; | |
339 | ||
340 | t->pid = fork(); | |
341 | if (t->pid < 0) | |
342 | return -errno; | |
343 | if (t->pid == 0) { | |
344 | const char *cmd[] = { | |
ff828763 | 345 | "systemd-pull", |
aa9bd499 | 346 | transfer_type_to_string(t->type), |
3d7415f4 LP |
347 | "--verify", |
348 | NULL, /* verify argument */ | |
349 | NULL, /* maybe --force */ | |
350 | NULL, /* maybe --dkr-index-url */ | |
351 | NULL, /* the actual URL */ | |
352 | NULL, /* remote */ | |
353 | NULL, /* local */ | |
354 | NULL | |
355 | }; | |
356 | int null_fd; | |
357 | unsigned k = 3; | |
358 | ||
359 | /* Child */ | |
360 | ||
361 | reset_all_signal_handlers(); | |
362 | reset_signal_mask(); | |
363 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); | |
364 | ||
365 | pipefd[0] = safe_close(pipefd[0]); | |
366 | ||
367 | if (dup2(pipefd[1], STDOUT_FILENO) != STDOUT_FILENO) { | |
368 | log_error_errno(errno, "Failed to dup2() fd: %m"); | |
369 | _exit(EXIT_FAILURE); | |
370 | } | |
371 | ||
372 | if (dup2(pipefd[1], STDERR_FILENO) != STDERR_FILENO) { | |
373 | log_error_errno(errno, "Failed to dup2() fd: %m"); | |
374 | _exit(EXIT_FAILURE); | |
375 | } | |
376 | ||
377 | if (pipefd[1] != STDOUT_FILENO && pipefd[1] != STDERR_FILENO) | |
378 | pipefd[1] = safe_close(pipefd[1]); | |
379 | ||
380 | null_fd = open("/dev/null", O_RDONLY|O_NOCTTY); | |
381 | if (null_fd < 0) { | |
382 | log_error_errno(errno, "Failed to open /dev/null: %m"); | |
383 | _exit(EXIT_FAILURE); | |
384 | } | |
385 | ||
386 | if (dup2(null_fd, STDIN_FILENO) != STDIN_FILENO) { | |
387 | log_error_errno(errno, "Failed to dup2() fd: %m"); | |
388 | _exit(EXIT_FAILURE); | |
389 | } | |
390 | ||
391 | if (null_fd != STDIN_FILENO) | |
392 | safe_close(null_fd); | |
393 | ||
394 | fd_cloexec(STDIN_FILENO, false); | |
395 | fd_cloexec(STDOUT_FILENO, false); | |
396 | fd_cloexec(STDERR_FILENO, false); | |
397 | ||
398 | putenv((char*) "SYSTEMD_LOG_TARGET=console-prefixed"); | |
399 | ||
400 | cmd[k++] = import_verify_to_string(t->verify); | |
401 | if (t->force_local) | |
402 | cmd[k++] = "--force"; | |
403 | ||
404 | if (t->dkr_index_url) { | |
405 | cmd[k++] = "--dkr-index-url"; | |
406 | cmd[k++] = t->dkr_index_url; | |
407 | } | |
408 | ||
409 | cmd[k++] = t->remote; | |
410 | if (t->local) | |
411 | cmd[k++] = t->local; | |
412 | cmd[k] = NULL; | |
413 | ||
ff828763 | 414 | execv(SYSTEMD_PULL_PATH, (char * const *) cmd); |
3d7415f4 LP |
415 | log_error_errno(errno, "Failed to execute import tool: %m"); |
416 | _exit(EXIT_FAILURE); | |
417 | } | |
418 | ||
419 | pipefd[1] = safe_close(pipefd[1]); | |
420 | t->log_fd = pipefd[0]; | |
421 | pipefd[0] = -1; | |
422 | ||
423 | r = sd_event_add_child(t->manager->event, &t->pid_event_source, t->pid, WEXITED, transfer_on_pid, t); | |
424 | if (r < 0) | |
425 | return r; | |
426 | ||
427 | r = sd_event_add_io(t->manager->event, &t->log_event_source, t->log_fd, EPOLLIN, transfer_on_log, t); | |
428 | if (r < 0) | |
429 | return r; | |
430 | ||
431 | /* Make sure always process logging before SIGCHLD */ | |
432 | r = sd_event_source_set_priority(t->log_event_source, SD_EVENT_PRIORITY_NORMAL -5); | |
433 | if (r < 0) | |
434 | return r; | |
435 | ||
436 | r = sd_bus_emit_signal( | |
437 | t->manager->bus, | |
438 | "/org/freedesktop/import1", | |
439 | "org.freedesktop.import1.Manager", | |
440 | "TransferNew", | |
441 | "uo", | |
442 | t->id, | |
443 | t->object_path); | |
444 | if (r < 0) | |
445 | return r; | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | static Manager *manager_unref(Manager *m) { | |
451 | Transfer *t; | |
452 | ||
453 | if (!m) | |
454 | return NULL; | |
455 | ||
456 | while ((t = hashmap_first(m->transfers))) | |
457 | transfer_unref(t); | |
458 | ||
459 | hashmap_free(m->transfers); | |
460 | ||
461 | bus_verify_polkit_async_registry_free(m->polkit_registry); | |
462 | ||
463 | sd_bus_close(m->bus); | |
464 | sd_bus_unref(m->bus); | |
465 | sd_event_unref(m->event); | |
466 | ||
467 | free(m); | |
468 | return NULL; | |
469 | } | |
470 | ||
471 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); | |
472 | ||
473 | static int manager_new(Manager **ret) { | |
474 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
475 | int r; | |
476 | ||
477 | assert(ret); | |
478 | ||
479 | m = new0(Manager, 1); | |
480 | if (!m) | |
481 | return -ENOMEM; | |
482 | ||
483 | r = sd_event_default(&m->event); | |
484 | if (r < 0) | |
485 | return r; | |
486 | ||
487 | sd_event_set_watchdog(m->event, true); | |
488 | ||
489 | r = sd_bus_default_system(&m->bus); | |
490 | if (r < 0) | |
491 | return r; | |
492 | ||
493 | *ret = m; | |
494 | m = NULL; | |
495 | ||
496 | return 0; | |
497 | } | |
498 | ||
499 | static Transfer *manager_find(Manager *m, TransferType type, const char *dkr_index_url, const char *remote) { | |
500 | Transfer *t; | |
501 | Iterator i; | |
502 | ||
503 | assert(m); | |
504 | assert(type >= 0); | |
505 | assert(type < _TRANSFER_TYPE_MAX); | |
506 | ||
507 | HASHMAP_FOREACH(t, m->transfers, i) { | |
508 | ||
509 | if (t->type == type && | |
510 | streq_ptr(t->remote, remote) && | |
511 | streq_ptr(t->dkr_index_url, dkr_index_url)) | |
512 | return t; | |
513 | } | |
514 | ||
515 | return NULL; | |
516 | } | |
517 | ||
518 | static int method_pull_tar_or_raw(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
519 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
520 | const char *remote, *local, *verify, *object; | |
521 | Manager *m = userdata; | |
522 | ImportVerify v; | |
523 | TransferType type; | |
524 | int force, r; | |
525 | uint32_t id; | |
526 | ||
527 | assert(bus); | |
528 | assert(msg); | |
529 | assert(m); | |
530 | ||
531 | r = bus_verify_polkit_async( | |
532 | msg, | |
533 | CAP_SYS_ADMIN, | |
534 | "org.freedesktop.import1.pull", | |
535 | false, | |
536 | &m->polkit_registry, | |
537 | error); | |
538 | if (r < 0) | |
539 | return r; | |
540 | if (r == 0) | |
541 | return 1; /* Will call us back */ | |
542 | ||
543 | r = sd_bus_message_read(msg, "sssb", &remote, &local, &verify, &force); | |
544 | if (r < 0) | |
545 | return r; | |
546 | ||
547 | if (!http_url_is_valid(remote)) | |
548 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "URL %s is invalid", remote); | |
549 | ||
550 | if (isempty(local)) | |
551 | local = NULL; | |
552 | else if (!machine_name_is_valid(local)) | |
553 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); | |
554 | ||
555 | if (isempty(verify)) | |
556 | v = IMPORT_VERIFY_SIGNATURE; | |
557 | else | |
558 | v = import_verify_from_string(verify); | |
559 | if (v < 0) | |
560 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown verification mode %s", verify); | |
561 | ||
562 | type = streq_ptr(sd_bus_message_get_member(msg), "PullTar") ? TRANSFER_TAR : TRANSFER_RAW; | |
563 | ||
564 | if (manager_find(m, type, NULL, remote)) | |
565 | return sd_bus_error_setf(error, BUS_ERROR_TRANSFER_IN_PROGRESS, "Transfer for %s already in progress.", remote); | |
566 | ||
567 | r = transfer_new(m, &t); | |
568 | if (r < 0) | |
569 | return r; | |
570 | ||
571 | t->type = type; | |
572 | t->verify = v; | |
573 | t->force_local = force; | |
574 | ||
575 | t->remote = strdup(remote); | |
576 | if (!t->remote) | |
577 | return -ENOMEM; | |
578 | ||
579 | t->local = strdup(local); | |
580 | if (!t->local) | |
581 | return -ENOMEM; | |
582 | ||
583 | r = transfer_start(t); | |
584 | if (r < 0) | |
585 | return r; | |
586 | ||
587 | object = t->object_path; | |
588 | id = t->id; | |
589 | t = NULL; | |
590 | ||
591 | return sd_bus_reply_method_return(msg, "uo", id, object); | |
592 | } | |
593 | ||
594 | static int method_pull_dkr(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
595 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
596 | const char *index_url, *remote, *tag, *local, *verify, *object; | |
597 | Manager *m = userdata; | |
598 | ImportVerify v; | |
599 | int force, r; | |
600 | uint32_t id; | |
601 | ||
602 | assert(bus); | |
603 | assert(msg); | |
604 | assert(m); | |
605 | ||
606 | r = bus_verify_polkit_async( | |
607 | msg, | |
608 | CAP_SYS_ADMIN, | |
609 | "org.freedesktop.import1.pull", | |
610 | false, | |
611 | &m->polkit_registry, | |
612 | error); | |
613 | if (r < 0) | |
614 | return r; | |
615 | if (r == 0) | |
616 | return 1; /* Will call us back */ | |
617 | ||
618 | r = sd_bus_message_read(msg, "sssssb", &index_url, &remote, &tag, &local, &verify, &force); | |
619 | if (r < 0) | |
620 | return r; | |
621 | ||
622 | if (isempty(index_url)) | |
623 | index_url = DEFAULT_DKR_INDEX_URL; | |
624 | if (!index_url) | |
625 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Index URL must be specified."); | |
626 | if (!http_url_is_valid(index_url)) | |
627 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Index URL %s is invalid", index_url); | |
628 | ||
629 | if (!dkr_name_is_valid(remote)) | |
630 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Remote name %s is not valid", remote); | |
631 | ||
632 | if (isempty(tag)) | |
633 | tag = "latest"; | |
634 | else if (!dkr_tag_is_valid(tag)) | |
635 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Tag %s is not valid", tag); | |
636 | ||
637 | if (isempty(local)) | |
638 | local = NULL; | |
639 | else if (!machine_name_is_valid(local)) | |
640 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); | |
641 | ||
642 | if (isempty(verify)) | |
643 | v = IMPORT_VERIFY_SIGNATURE; | |
644 | else | |
645 | v = import_verify_from_string(verify); | |
646 | if (v < 0) | |
647 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown verification mode %s", verify); | |
648 | ||
649 | if (v != IMPORT_VERIFY_NO) | |
650 | return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "DKR does not support verification."); | |
651 | ||
652 | if (manager_find(m, TRANSFER_DKR, index_url, remote)) | |
653 | return sd_bus_error_setf(error, BUS_ERROR_TRANSFER_IN_PROGRESS, "Transfer for %s already in progress.", remote); | |
654 | ||
655 | r = transfer_new(m, &t); | |
656 | if (r < 0) | |
657 | return r; | |
658 | ||
659 | t->type = TRANSFER_DKR; | |
660 | t->verify = v; | |
661 | t->force_local = force; | |
662 | ||
663 | t->dkr_index_url = strdup(index_url); | |
664 | if (!t->dkr_index_url) | |
665 | return -ENOMEM; | |
666 | ||
667 | t->remote = strjoin(remote, ":", tag, NULL); | |
668 | if (!t->remote) | |
669 | return -ENOMEM; | |
670 | ||
671 | t->local = strdup(local); | |
672 | if (!t->local) | |
673 | return -ENOMEM; | |
674 | ||
675 | r = transfer_start(t); | |
676 | if (r < 0) | |
677 | return r; | |
678 | ||
679 | object = t->object_path; | |
680 | id = t->id; | |
681 | t = NULL; | |
682 | ||
683 | return sd_bus_reply_method_return(msg, "uo", id, object); | |
684 | } | |
685 | ||
686 | static int method_list_transfers(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
687 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
688 | Manager *m = userdata; | |
689 | Transfer *t; | |
690 | Iterator i; | |
691 | int r; | |
692 | ||
693 | assert(bus); | |
694 | assert(msg); | |
695 | assert(m); | |
696 | ||
697 | r = sd_bus_message_new_method_return(msg, &reply); | |
698 | if (r < 0) | |
699 | return r; | |
700 | ||
701 | r = sd_bus_message_open_container(reply, 'a', "(ussso)"); | |
702 | if (r < 0) | |
703 | return r; | |
704 | ||
705 | HASHMAP_FOREACH(t, m->transfers, i) { | |
706 | ||
707 | r = sd_bus_message_append( | |
708 | reply, | |
709 | "(ussso)", | |
710 | t->id, | |
711 | transfer_type_to_string(t->type), | |
712 | t->remote, | |
713 | t->local, | |
714 | t->object_path); | |
715 | if (r < 0) | |
716 | return r; | |
717 | } | |
718 | ||
719 | r = sd_bus_message_close_container(reply); | |
720 | if (r < 0) | |
721 | return r; | |
722 | ||
723 | return sd_bus_send(bus, reply, NULL); | |
724 | } | |
725 | ||
726 | static int method_cancel(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
727 | Transfer *t = userdata; | |
728 | int r; | |
729 | ||
730 | assert(bus); | |
731 | assert(msg); | |
732 | assert(t); | |
733 | ||
734 | r = bus_verify_polkit_async( | |
735 | msg, | |
736 | CAP_SYS_ADMIN, | |
737 | "org.freedesktop.import1.pull", | |
738 | false, | |
739 | &t->manager->polkit_registry, | |
740 | error); | |
741 | if (r < 0) | |
742 | return r; | |
743 | if (r == 0) | |
744 | return 1; /* Will call us back */ | |
745 | ||
746 | r = transfer_cancel(t); | |
747 | if (r < 0) | |
748 | return r; | |
749 | ||
750 | return sd_bus_reply_method_return(msg, NULL); | |
751 | } | |
752 | ||
753 | static int method_cancel_transfer(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
754 | Manager *m = userdata; | |
755 | Transfer *t; | |
756 | uint32_t id; | |
757 | int r; | |
758 | ||
759 | assert(bus); | |
760 | assert(msg); | |
761 | assert(m); | |
762 | ||
763 | r = bus_verify_polkit_async( | |
764 | msg, | |
765 | CAP_SYS_ADMIN, | |
766 | "org.freedesktop.import1.pull", | |
767 | false, | |
768 | &m->polkit_registry, | |
769 | error); | |
770 | if (r < 0) | |
771 | return r; | |
772 | if (r == 0) | |
773 | return 1; /* Will call us back */ | |
774 | ||
775 | r = sd_bus_message_read(msg, "u", &id); | |
776 | if (r < 0) | |
777 | return r; | |
778 | if (id <= 0) | |
779 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid transfer id"); | |
780 | ||
781 | t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); | |
782 | if (!t) | |
09d46cfd | 783 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_TRANSFER, "No transfer by id %" PRIu32, id); |
3d7415f4 LP |
784 | |
785 | r = transfer_cancel(t); | |
786 | if (r < 0) | |
787 | return r; | |
788 | ||
789 | return sd_bus_reply_method_return(msg, NULL); | |
790 | } | |
791 | ||
792 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, transfer_type, TransferType); | |
793 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_verify, import_verify, ImportVerify); | |
794 | ||
795 | static const sd_bus_vtable transfer_vtable[] = { | |
796 | SD_BUS_VTABLE_START(0), | |
797 | SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Transfer, id), SD_BUS_VTABLE_PROPERTY_CONST), | |
798 | SD_BUS_PROPERTY("Local", "s", NULL, offsetof(Transfer, local), SD_BUS_VTABLE_PROPERTY_CONST), | |
799 | SD_BUS_PROPERTY("Remote", "s", NULL, offsetof(Transfer, remote), SD_BUS_VTABLE_PROPERTY_CONST), | |
800 | SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Transfer, type), SD_BUS_VTABLE_PROPERTY_CONST), | |
801 | SD_BUS_PROPERTY("Verify", "s", property_get_verify, offsetof(Transfer, verify), SD_BUS_VTABLE_PROPERTY_CONST), | |
802 | SD_BUS_METHOD("Cancel", NULL, NULL, method_cancel, SD_BUS_VTABLE_UNPRIVILEGED), | |
803 | SD_BUS_SIGNAL("LogMessage", "us", 0), | |
804 | SD_BUS_VTABLE_END, | |
805 | }; | |
806 | ||
807 | static const sd_bus_vtable manager_vtable[] = { | |
808 | SD_BUS_VTABLE_START(0), | |
809 | SD_BUS_METHOD("PullTar", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
810 | SD_BUS_METHOD("PullRaw", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
811 | SD_BUS_METHOD("PullDkr", "sssssb", "uo", method_pull_dkr, SD_BUS_VTABLE_UNPRIVILEGED), | |
812 | SD_BUS_METHOD("ListTransfers", NULL, "a(ussso)", method_list_transfers, SD_BUS_VTABLE_UNPRIVILEGED), | |
813 | SD_BUS_METHOD("CancelTransfer", "u", NULL, method_cancel_transfer, SD_BUS_VTABLE_UNPRIVILEGED), | |
814 | SD_BUS_SIGNAL("TransferNew", "uo", 0), | |
815 | SD_BUS_SIGNAL("TransferRemoved", "uos", 0), | |
816 | SD_BUS_VTABLE_END, | |
817 | }; | |
818 | ||
819 | static int transfer_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { | |
820 | Manager *m = userdata; | |
821 | Transfer *t; | |
822 | const char *p; | |
823 | uint32_t id; | |
824 | int r; | |
825 | ||
826 | assert(bus); | |
827 | assert(path); | |
828 | assert(interface); | |
829 | assert(found); | |
830 | assert(m); | |
831 | ||
832 | p = startswith(path, "/org/freedesktop/import1/transfer/_"); | |
833 | if (!p) | |
834 | return 0; | |
835 | ||
836 | r = safe_atou32(p, &id); | |
837 | if (r < 0 || id == 0) | |
838 | return 0; | |
839 | ||
840 | t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); | |
841 | if (!t) | |
842 | return 0; | |
843 | ||
844 | *found = t; | |
845 | return 1; | |
846 | } | |
847 | ||
848 | static int transfer_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { | |
849 | _cleanup_strv_free_ char **l = NULL; | |
850 | Manager *m = userdata; | |
851 | Transfer *t; | |
852 | unsigned k = 0; | |
853 | Iterator i; | |
854 | ||
855 | l = new0(char*, hashmap_size(m->transfers) + 1); | |
856 | if (!l) | |
857 | return -ENOMEM; | |
858 | ||
859 | HASHMAP_FOREACH(t, m->transfers, i) { | |
860 | ||
861 | l[k] = strdup(t->object_path); | |
862 | if (!l[k]) | |
863 | return -ENOMEM; | |
864 | ||
865 | k++; | |
866 | } | |
867 | ||
868 | *nodes = l; | |
869 | l = NULL; | |
870 | ||
871 | return 1; | |
872 | } | |
873 | ||
874 | static int manager_add_bus_objects(Manager *m) { | |
875 | int r; | |
876 | ||
877 | assert(m); | |
878 | ||
879 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/import1", "org.freedesktop.import1.Manager", manager_vtable, m); | |
880 | if (r < 0) | |
881 | return log_error_errno(r, "Failed to register object: %m"); | |
882 | ||
883 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/import1/transfer", "org.freedesktop.import1.Transfer", transfer_vtable, transfer_object_find, m); | |
884 | if (r < 0) | |
885 | return log_error_errno(r, "Failed to register object: %m"); | |
886 | ||
887 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/import1/transfer", transfer_node_enumerator, m); | |
888 | if (r < 0) | |
889 | return log_error_errno(r, "Failed to add transfer enumerator: %m"); | |
890 | ||
891 | r = sd_bus_request_name(m->bus, "org.freedesktop.import1", 0); | |
892 | if (r < 0) | |
893 | return log_error_errno(r, "Failed to register name: %m"); | |
894 | ||
895 | r = sd_bus_attach_event(m->bus, m->event, 0); | |
896 | if (r < 0) | |
897 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
898 | ||
899 | return 0; | |
900 | } | |
901 | ||
902 | static bool manager_check_idle(void *userdata) { | |
903 | Manager *m = userdata; | |
904 | ||
905 | return hashmap_isempty(m->transfers); | |
906 | } | |
907 | ||
908 | static int manager_run(Manager *m) { | |
909 | assert(m); | |
910 | ||
911 | return bus_event_loop_with_idle( | |
912 | m->event, | |
913 | m->bus, | |
914 | "org.freedesktop.import1", | |
915 | DEFAULT_EXIT_USEC, | |
916 | manager_check_idle, | |
917 | m); | |
918 | } | |
919 | ||
920 | int main(int argc, char *argv[]) { | |
921 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
922 | int r; | |
923 | ||
924 | log_set_target(LOG_TARGET_AUTO); | |
925 | log_parse_environment(); | |
926 | log_open(); | |
927 | ||
928 | umask(0022); | |
929 | ||
930 | if (argc != 1) { | |
931 | log_error("This program takes no arguments."); | |
932 | r = -EINVAL; | |
933 | goto finish; | |
934 | } | |
935 | ||
936 | assert_se(sigprocmask_many(SIG_BLOCK, SIGCHLD, -1) >= 0); | |
937 | ||
938 | r = manager_new(&m); | |
939 | if (r < 0) { | |
940 | log_error_errno(r, "Failed to allocate manager object: %m"); | |
941 | goto finish; | |
942 | } | |
943 | ||
944 | r = manager_add_bus_objects(m); | |
945 | if (r < 0) | |
946 | goto finish; | |
947 | ||
948 | r = manager_run(m); | |
949 | if (r < 0) { | |
950 | log_error_errno(r, "Failed to run event loop: %m"); | |
951 | goto finish; | |
952 | } | |
953 | ||
954 | finish: | |
955 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
956 | } |