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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 | ||
89 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(transfer_type, TransferType); | |
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 | ||
169 | log_full(priority, "(transfer%" PRIu32 "): %s", t->id, line); | |
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[] = { | |
345 | "systemd-import", | |
346 | t->type == TRANSFER_TAR ? "pull-tar" : | |
347 | t->type == TRANSFER_RAW ? "pull-raw" : | |
348 | "pull-dkr", | |
349 | "--verify", | |
350 | NULL, /* verify argument */ | |
351 | NULL, /* maybe --force */ | |
352 | NULL, /* maybe --dkr-index-url */ | |
353 | NULL, /* the actual URL */ | |
354 | NULL, /* remote */ | |
355 | NULL, /* local */ | |
356 | NULL | |
357 | }; | |
358 | int null_fd; | |
359 | unsigned k = 3; | |
360 | ||
361 | /* Child */ | |
362 | ||
363 | reset_all_signal_handlers(); | |
364 | reset_signal_mask(); | |
365 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); | |
366 | ||
367 | pipefd[0] = safe_close(pipefd[0]); | |
368 | ||
369 | if (dup2(pipefd[1], STDOUT_FILENO) != STDOUT_FILENO) { | |
370 | log_error_errno(errno, "Failed to dup2() fd: %m"); | |
371 | _exit(EXIT_FAILURE); | |
372 | } | |
373 | ||
374 | if (dup2(pipefd[1], STDERR_FILENO) != STDERR_FILENO) { | |
375 | log_error_errno(errno, "Failed to dup2() fd: %m"); | |
376 | _exit(EXIT_FAILURE); | |
377 | } | |
378 | ||
379 | if (pipefd[1] != STDOUT_FILENO && pipefd[1] != STDERR_FILENO) | |
380 | pipefd[1] = safe_close(pipefd[1]); | |
381 | ||
382 | null_fd = open("/dev/null", O_RDONLY|O_NOCTTY); | |
383 | if (null_fd < 0) { | |
384 | log_error_errno(errno, "Failed to open /dev/null: %m"); | |
385 | _exit(EXIT_FAILURE); | |
386 | } | |
387 | ||
388 | if (dup2(null_fd, STDIN_FILENO) != STDIN_FILENO) { | |
389 | log_error_errno(errno, "Failed to dup2() fd: %m"); | |
390 | _exit(EXIT_FAILURE); | |
391 | } | |
392 | ||
393 | if (null_fd != STDIN_FILENO) | |
394 | safe_close(null_fd); | |
395 | ||
396 | fd_cloexec(STDIN_FILENO, false); | |
397 | fd_cloexec(STDOUT_FILENO, false); | |
398 | fd_cloexec(STDERR_FILENO, false); | |
399 | ||
400 | putenv((char*) "SYSTEMD_LOG_TARGET=console-prefixed"); | |
401 | ||
402 | cmd[k++] = import_verify_to_string(t->verify); | |
403 | if (t->force_local) | |
404 | cmd[k++] = "--force"; | |
405 | ||
406 | if (t->dkr_index_url) { | |
407 | cmd[k++] = "--dkr-index-url"; | |
408 | cmd[k++] = t->dkr_index_url; | |
409 | } | |
410 | ||
411 | cmd[k++] = t->remote; | |
412 | if (t->local) | |
413 | cmd[k++] = t->local; | |
414 | cmd[k] = NULL; | |
415 | ||
416 | execv(SYSTEMD_IMPORT_PATH, (char * const *) cmd); | |
417 | log_error_errno(errno, "Failed to execute import tool: %m"); | |
418 | _exit(EXIT_FAILURE); | |
419 | } | |
420 | ||
421 | pipefd[1] = safe_close(pipefd[1]); | |
422 | t->log_fd = pipefd[0]; | |
423 | pipefd[0] = -1; | |
424 | ||
425 | r = sd_event_add_child(t->manager->event, &t->pid_event_source, t->pid, WEXITED, transfer_on_pid, t); | |
426 | if (r < 0) | |
427 | return r; | |
428 | ||
429 | r = sd_event_add_io(t->manager->event, &t->log_event_source, t->log_fd, EPOLLIN, transfer_on_log, t); | |
430 | if (r < 0) | |
431 | return r; | |
432 | ||
433 | /* Make sure always process logging before SIGCHLD */ | |
434 | r = sd_event_source_set_priority(t->log_event_source, SD_EVENT_PRIORITY_NORMAL -5); | |
435 | if (r < 0) | |
436 | return r; | |
437 | ||
438 | r = sd_bus_emit_signal( | |
439 | t->manager->bus, | |
440 | "/org/freedesktop/import1", | |
441 | "org.freedesktop.import1.Manager", | |
442 | "TransferNew", | |
443 | "uo", | |
444 | t->id, | |
445 | t->object_path); | |
446 | if (r < 0) | |
447 | return r; | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
452 | static Manager *manager_unref(Manager *m) { | |
453 | Transfer *t; | |
454 | ||
455 | if (!m) | |
456 | return NULL; | |
457 | ||
458 | while ((t = hashmap_first(m->transfers))) | |
459 | transfer_unref(t); | |
460 | ||
461 | hashmap_free(m->transfers); | |
462 | ||
463 | bus_verify_polkit_async_registry_free(m->polkit_registry); | |
464 | ||
465 | sd_bus_close(m->bus); | |
466 | sd_bus_unref(m->bus); | |
467 | sd_event_unref(m->event); | |
468 | ||
469 | free(m); | |
470 | return NULL; | |
471 | } | |
472 | ||
473 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); | |
474 | ||
475 | static int manager_new(Manager **ret) { | |
476 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
477 | int r; | |
478 | ||
479 | assert(ret); | |
480 | ||
481 | m = new0(Manager, 1); | |
482 | if (!m) | |
483 | return -ENOMEM; | |
484 | ||
485 | r = sd_event_default(&m->event); | |
486 | if (r < 0) | |
487 | return r; | |
488 | ||
489 | sd_event_set_watchdog(m->event, true); | |
490 | ||
491 | r = sd_bus_default_system(&m->bus); | |
492 | if (r < 0) | |
493 | return r; | |
494 | ||
495 | *ret = m; | |
496 | m = NULL; | |
497 | ||
498 | return 0; | |
499 | } | |
500 | ||
501 | static Transfer *manager_find(Manager *m, TransferType type, const char *dkr_index_url, const char *remote) { | |
502 | Transfer *t; | |
503 | Iterator i; | |
504 | ||
505 | assert(m); | |
506 | assert(type >= 0); | |
507 | assert(type < _TRANSFER_TYPE_MAX); | |
508 | ||
509 | HASHMAP_FOREACH(t, m->transfers, i) { | |
510 | ||
511 | if (t->type == type && | |
512 | streq_ptr(t->remote, remote) && | |
513 | streq_ptr(t->dkr_index_url, dkr_index_url)) | |
514 | return t; | |
515 | } | |
516 | ||
517 | return NULL; | |
518 | } | |
519 | ||
520 | static int method_pull_tar_or_raw(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
521 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
522 | const char *remote, *local, *verify, *object; | |
523 | Manager *m = userdata; | |
524 | ImportVerify v; | |
525 | TransferType type; | |
526 | int force, r; | |
527 | uint32_t id; | |
528 | ||
529 | assert(bus); | |
530 | assert(msg); | |
531 | assert(m); | |
532 | ||
533 | r = bus_verify_polkit_async( | |
534 | msg, | |
535 | CAP_SYS_ADMIN, | |
536 | "org.freedesktop.import1.pull", | |
537 | false, | |
538 | &m->polkit_registry, | |
539 | error); | |
540 | if (r < 0) | |
541 | return r; | |
542 | if (r == 0) | |
543 | return 1; /* Will call us back */ | |
544 | ||
545 | r = sd_bus_message_read(msg, "sssb", &remote, &local, &verify, &force); | |
546 | if (r < 0) | |
547 | return r; | |
548 | ||
549 | if (!http_url_is_valid(remote)) | |
550 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "URL %s is invalid", remote); | |
551 | ||
552 | if (isempty(local)) | |
553 | local = NULL; | |
554 | else if (!machine_name_is_valid(local)) | |
555 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); | |
556 | ||
557 | if (isempty(verify)) | |
558 | v = IMPORT_VERIFY_SIGNATURE; | |
559 | else | |
560 | v = import_verify_from_string(verify); | |
561 | if (v < 0) | |
562 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown verification mode %s", verify); | |
563 | ||
564 | type = streq_ptr(sd_bus_message_get_member(msg), "PullTar") ? TRANSFER_TAR : TRANSFER_RAW; | |
565 | ||
566 | if (manager_find(m, type, NULL, remote)) | |
567 | return sd_bus_error_setf(error, BUS_ERROR_TRANSFER_IN_PROGRESS, "Transfer for %s already in progress.", remote); | |
568 | ||
569 | r = transfer_new(m, &t); | |
570 | if (r < 0) | |
571 | return r; | |
572 | ||
573 | t->type = type; | |
574 | t->verify = v; | |
575 | t->force_local = force; | |
576 | ||
577 | t->remote = strdup(remote); | |
578 | if (!t->remote) | |
579 | return -ENOMEM; | |
580 | ||
581 | t->local = strdup(local); | |
582 | if (!t->local) | |
583 | return -ENOMEM; | |
584 | ||
585 | r = transfer_start(t); | |
586 | if (r < 0) | |
587 | return r; | |
588 | ||
589 | object = t->object_path; | |
590 | id = t->id; | |
591 | t = NULL; | |
592 | ||
593 | return sd_bus_reply_method_return(msg, "uo", id, object); | |
594 | } | |
595 | ||
596 | static int method_pull_dkr(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
597 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
598 | const char *index_url, *remote, *tag, *local, *verify, *object; | |
599 | Manager *m = userdata; | |
600 | ImportVerify v; | |
601 | int force, r; | |
602 | uint32_t id; | |
603 | ||
604 | assert(bus); | |
605 | assert(msg); | |
606 | assert(m); | |
607 | ||
608 | r = bus_verify_polkit_async( | |
609 | msg, | |
610 | CAP_SYS_ADMIN, | |
611 | "org.freedesktop.import1.pull", | |
612 | false, | |
613 | &m->polkit_registry, | |
614 | error); | |
615 | if (r < 0) | |
616 | return r; | |
617 | if (r == 0) | |
618 | return 1; /* Will call us back */ | |
619 | ||
620 | r = sd_bus_message_read(msg, "sssssb", &index_url, &remote, &tag, &local, &verify, &force); | |
621 | if (r < 0) | |
622 | return r; | |
623 | ||
624 | if (isempty(index_url)) | |
625 | index_url = DEFAULT_DKR_INDEX_URL; | |
626 | if (!index_url) | |
627 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Index URL must be specified."); | |
628 | if (!http_url_is_valid(index_url)) | |
629 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Index URL %s is invalid", index_url); | |
630 | ||
631 | if (!dkr_name_is_valid(remote)) | |
632 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Remote name %s is not valid", remote); | |
633 | ||
634 | if (isempty(tag)) | |
635 | tag = "latest"; | |
636 | else if (!dkr_tag_is_valid(tag)) | |
637 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Tag %s is not valid", tag); | |
638 | ||
639 | if (isempty(local)) | |
640 | local = NULL; | |
641 | else if (!machine_name_is_valid(local)) | |
642 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); | |
643 | ||
644 | if (isempty(verify)) | |
645 | v = IMPORT_VERIFY_SIGNATURE; | |
646 | else | |
647 | v = import_verify_from_string(verify); | |
648 | if (v < 0) | |
649 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown verification mode %s", verify); | |
650 | ||
651 | if (v != IMPORT_VERIFY_NO) | |
652 | return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "DKR does not support verification."); | |
653 | ||
654 | if (manager_find(m, TRANSFER_DKR, index_url, remote)) | |
655 | return sd_bus_error_setf(error, BUS_ERROR_TRANSFER_IN_PROGRESS, "Transfer for %s already in progress.", remote); | |
656 | ||
657 | r = transfer_new(m, &t); | |
658 | if (r < 0) | |
659 | return r; | |
660 | ||
661 | t->type = TRANSFER_DKR; | |
662 | t->verify = v; | |
663 | t->force_local = force; | |
664 | ||
665 | t->dkr_index_url = strdup(index_url); | |
666 | if (!t->dkr_index_url) | |
667 | return -ENOMEM; | |
668 | ||
669 | t->remote = strjoin(remote, ":", tag, NULL); | |
670 | if (!t->remote) | |
671 | return -ENOMEM; | |
672 | ||
673 | t->local = strdup(local); | |
674 | if (!t->local) | |
675 | return -ENOMEM; | |
676 | ||
677 | r = transfer_start(t); | |
678 | if (r < 0) | |
679 | return r; | |
680 | ||
681 | object = t->object_path; | |
682 | id = t->id; | |
683 | t = NULL; | |
684 | ||
685 | return sd_bus_reply_method_return(msg, "uo", id, object); | |
686 | } | |
687 | ||
688 | static int method_list_transfers(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
689 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
690 | Manager *m = userdata; | |
691 | Transfer *t; | |
692 | Iterator i; | |
693 | int r; | |
694 | ||
695 | assert(bus); | |
696 | assert(msg); | |
697 | assert(m); | |
698 | ||
699 | r = sd_bus_message_new_method_return(msg, &reply); | |
700 | if (r < 0) | |
701 | return r; | |
702 | ||
703 | r = sd_bus_message_open_container(reply, 'a', "(ussso)"); | |
704 | if (r < 0) | |
705 | return r; | |
706 | ||
707 | HASHMAP_FOREACH(t, m->transfers, i) { | |
708 | ||
709 | r = sd_bus_message_append( | |
710 | reply, | |
711 | "(ussso)", | |
712 | t->id, | |
713 | transfer_type_to_string(t->type), | |
714 | t->remote, | |
715 | t->local, | |
716 | t->object_path); | |
717 | if (r < 0) | |
718 | return r; | |
719 | } | |
720 | ||
721 | r = sd_bus_message_close_container(reply); | |
722 | if (r < 0) | |
723 | return r; | |
724 | ||
725 | return sd_bus_send(bus, reply, NULL); | |
726 | } | |
727 | ||
728 | static int method_cancel(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
729 | Transfer *t = userdata; | |
730 | int r; | |
731 | ||
732 | assert(bus); | |
733 | assert(msg); | |
734 | assert(t); | |
735 | ||
736 | r = bus_verify_polkit_async( | |
737 | msg, | |
738 | CAP_SYS_ADMIN, | |
739 | "org.freedesktop.import1.pull", | |
740 | false, | |
741 | &t->manager->polkit_registry, | |
742 | error); | |
743 | if (r < 0) | |
744 | return r; | |
745 | if (r == 0) | |
746 | return 1; /* Will call us back */ | |
747 | ||
748 | r = transfer_cancel(t); | |
749 | if (r < 0) | |
750 | return r; | |
751 | ||
752 | return sd_bus_reply_method_return(msg, NULL); | |
753 | } | |
754 | ||
755 | static int method_cancel_transfer(sd_bus *bus, sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
756 | Manager *m = userdata; | |
757 | Transfer *t; | |
758 | uint32_t id; | |
759 | int r; | |
760 | ||
761 | assert(bus); | |
762 | assert(msg); | |
763 | assert(m); | |
764 | ||
765 | r = bus_verify_polkit_async( | |
766 | msg, | |
767 | CAP_SYS_ADMIN, | |
768 | "org.freedesktop.import1.pull", | |
769 | false, | |
770 | &m->polkit_registry, | |
771 | error); | |
772 | if (r < 0) | |
773 | return r; | |
774 | if (r == 0) | |
775 | return 1; /* Will call us back */ | |
776 | ||
777 | r = sd_bus_message_read(msg, "u", &id); | |
778 | if (r < 0) | |
779 | return r; | |
780 | if (id <= 0) | |
781 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid transfer id"); | |
782 | ||
783 | t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); | |
784 | if (!t) | |
785 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_TRANSFER, "Not transfer by id %" PRIu32, id); | |
786 | ||
787 | r = transfer_cancel(t); | |
788 | if (r < 0) | |
789 | return r; | |
790 | ||
791 | return sd_bus_reply_method_return(msg, NULL); | |
792 | } | |
793 | ||
794 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, transfer_type, TransferType); | |
795 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_verify, import_verify, ImportVerify); | |
796 | ||
797 | static const sd_bus_vtable transfer_vtable[] = { | |
798 | SD_BUS_VTABLE_START(0), | |
799 | SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Transfer, id), SD_BUS_VTABLE_PROPERTY_CONST), | |
800 | SD_BUS_PROPERTY("Local", "s", NULL, offsetof(Transfer, local), SD_BUS_VTABLE_PROPERTY_CONST), | |
801 | SD_BUS_PROPERTY("Remote", "s", NULL, offsetof(Transfer, remote), SD_BUS_VTABLE_PROPERTY_CONST), | |
802 | SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Transfer, type), SD_BUS_VTABLE_PROPERTY_CONST), | |
803 | SD_BUS_PROPERTY("Verify", "s", property_get_verify, offsetof(Transfer, verify), SD_BUS_VTABLE_PROPERTY_CONST), | |
804 | SD_BUS_METHOD("Cancel", NULL, NULL, method_cancel, SD_BUS_VTABLE_UNPRIVILEGED), | |
805 | SD_BUS_SIGNAL("LogMessage", "us", 0), | |
806 | SD_BUS_VTABLE_END, | |
807 | }; | |
808 | ||
809 | static const sd_bus_vtable manager_vtable[] = { | |
810 | SD_BUS_VTABLE_START(0), | |
811 | SD_BUS_METHOD("PullTar", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
812 | SD_BUS_METHOD("PullRaw", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
813 | SD_BUS_METHOD("PullDkr", "sssssb", "uo", method_pull_dkr, SD_BUS_VTABLE_UNPRIVILEGED), | |
814 | SD_BUS_METHOD("ListTransfers", NULL, "a(ussso)", method_list_transfers, SD_BUS_VTABLE_UNPRIVILEGED), | |
815 | SD_BUS_METHOD("CancelTransfer", "u", NULL, method_cancel_transfer, SD_BUS_VTABLE_UNPRIVILEGED), | |
816 | SD_BUS_SIGNAL("TransferNew", "uo", 0), | |
817 | SD_BUS_SIGNAL("TransferRemoved", "uos", 0), | |
818 | SD_BUS_VTABLE_END, | |
819 | }; | |
820 | ||
821 | static int transfer_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { | |
822 | Manager *m = userdata; | |
823 | Transfer *t; | |
824 | const char *p; | |
825 | uint32_t id; | |
826 | int r; | |
827 | ||
828 | assert(bus); | |
829 | assert(path); | |
830 | assert(interface); | |
831 | assert(found); | |
832 | assert(m); | |
833 | ||
834 | p = startswith(path, "/org/freedesktop/import1/transfer/_"); | |
835 | if (!p) | |
836 | return 0; | |
837 | ||
838 | r = safe_atou32(p, &id); | |
839 | if (r < 0 || id == 0) | |
840 | return 0; | |
841 | ||
842 | t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); | |
843 | if (!t) | |
844 | return 0; | |
845 | ||
846 | *found = t; | |
847 | return 1; | |
848 | } | |
849 | ||
850 | static int transfer_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { | |
851 | _cleanup_strv_free_ char **l = NULL; | |
852 | Manager *m = userdata; | |
853 | Transfer *t; | |
854 | unsigned k = 0; | |
855 | Iterator i; | |
856 | ||
857 | l = new0(char*, hashmap_size(m->transfers) + 1); | |
858 | if (!l) | |
859 | return -ENOMEM; | |
860 | ||
861 | HASHMAP_FOREACH(t, m->transfers, i) { | |
862 | ||
863 | l[k] = strdup(t->object_path); | |
864 | if (!l[k]) | |
865 | return -ENOMEM; | |
866 | ||
867 | k++; | |
868 | } | |
869 | ||
870 | *nodes = l; | |
871 | l = NULL; | |
872 | ||
873 | return 1; | |
874 | } | |
875 | ||
876 | static int manager_add_bus_objects(Manager *m) { | |
877 | int r; | |
878 | ||
879 | assert(m); | |
880 | ||
881 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/import1", "org.freedesktop.import1.Manager", manager_vtable, m); | |
882 | if (r < 0) | |
883 | return log_error_errno(r, "Failed to register object: %m"); | |
884 | ||
885 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/import1/transfer", "org.freedesktop.import1.Transfer", transfer_vtable, transfer_object_find, m); | |
886 | if (r < 0) | |
887 | return log_error_errno(r, "Failed to register object: %m"); | |
888 | ||
889 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/import1/transfer", transfer_node_enumerator, m); | |
890 | if (r < 0) | |
891 | return log_error_errno(r, "Failed to add transfer enumerator: %m"); | |
892 | ||
893 | r = sd_bus_request_name(m->bus, "org.freedesktop.import1", 0); | |
894 | if (r < 0) | |
895 | return log_error_errno(r, "Failed to register name: %m"); | |
896 | ||
897 | r = sd_bus_attach_event(m->bus, m->event, 0); | |
898 | if (r < 0) | |
899 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
900 | ||
901 | return 0; | |
902 | } | |
903 | ||
904 | static bool manager_check_idle(void *userdata) { | |
905 | Manager *m = userdata; | |
906 | ||
907 | return hashmap_isempty(m->transfers); | |
908 | } | |
909 | ||
910 | static int manager_run(Manager *m) { | |
911 | assert(m); | |
912 | ||
913 | return bus_event_loop_with_idle( | |
914 | m->event, | |
915 | m->bus, | |
916 | "org.freedesktop.import1", | |
917 | DEFAULT_EXIT_USEC, | |
918 | manager_check_idle, | |
919 | m); | |
920 | } | |
921 | ||
922 | int main(int argc, char *argv[]) { | |
923 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
924 | int r; | |
925 | ||
926 | log_set_target(LOG_TARGET_AUTO); | |
927 | log_parse_environment(); | |
928 | log_open(); | |
929 | ||
930 | umask(0022); | |
931 | ||
932 | if (argc != 1) { | |
933 | log_error("This program takes no arguments."); | |
934 | r = -EINVAL; | |
935 | goto finish; | |
936 | } | |
937 | ||
938 | assert_se(sigprocmask_many(SIG_BLOCK, SIGCHLD, -1) >= 0); | |
939 | ||
940 | r = manager_new(&m); | |
941 | if (r < 0) { | |
942 | log_error_errno(r, "Failed to allocate manager object: %m"); | |
943 | goto finish; | |
944 | } | |
945 | ||
946 | r = manager_add_bus_objects(m); | |
947 | if (r < 0) | |
948 | goto finish; | |
949 | ||
950 | r = manager_run(m); | |
951 | if (r < 0) { | |
952 | log_error_errno(r, "Failed to run event loop: %m"); | |
953 | goto finish; | |
954 | } | |
955 | ||
956 | finish: | |
957 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
958 | } |