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a8f11321 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
dc780ecf KS |
7 | Copyright 2013 Daniel Mack |
8 | Copyright 2014 Kay Sievers | |
a8f11321 LP |
9 | |
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
a8f11321 LP |
13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
a8f11321 | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
a8f11321 LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | ***/ | |
23 | ||
24 | #include <sys/socket.h> | |
25 | #include <sys/un.h> | |
26 | #include <sys/types.h> | |
27 | #include <fcntl.h> | |
28 | #include <unistd.h> | |
29 | #include <string.h> | |
30 | #include <errno.h> | |
d51539b1 | 31 | #include <sys/poll.h> |
a8f11321 | 32 | #include <stddef.h> |
71008e18 | 33 | #include <getopt.h> |
a8f11321 LP |
34 | |
35 | #include "log.h" | |
36 | #include "util.h" | |
37 | #include "socket-util.h" | |
d51539b1 LP |
38 | #include "sd-daemon.h" |
39 | #include "sd-bus.h" | |
40 | #include "bus-internal.h" | |
41 | #include "bus-message.h" | |
40ca29a1 | 42 | #include "bus-util.h" |
19befb2d | 43 | #include "bus-internal.h" |
71008e18 | 44 | #include "build.h" |
0721804f | 45 | #include "strv.h" |
ab9001a1 | 46 | #include "def.h" |
6a010ac9 | 47 | #include "capability.h" |
bcf3295d | 48 | #include "bus-policy.h" |
71008e18 | 49 | |
7f0d207d | 50 | static char *arg_address = NULL; |
0721804f | 51 | static char *arg_command_line_buffer = NULL; |
6a010ac9 | 52 | static bool arg_drop_privileges = false; |
2e2b3608 | 53 | static char **arg_configuration = NULL; |
0721804f | 54 | |
71008e18 DM |
55 | static int help(void) { |
56 | ||
57 | printf("%s [OPTIONS...]\n\n" | |
ba768916 | 58 | "Connect STDIO or a socket to a given bus address.\n\n" |
2e2b3608 LP |
59 | " -h --help Show this help\n" |
60 | " --version Show package version\n" | |
61 | " --drop-privileges Drop privileges\n" | |
62 | " --configuration=PATH Configuration file or directory\n" | |
7f0d207d | 63 | " --machine=MACHINE Connect to specified machine\n" |
2e2b3608 | 64 | " --address=ADDRESS Connect to the bus specified by ADDRESS\n" |
7f0d207d | 65 | " (default: " DEFAULT_SYSTEM_BUS_PATH ")\n", |
ba768916 | 66 | program_invocation_short_name); |
71008e18 DM |
67 | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static int parse_argv(int argc, char *argv[]) { | |
72 | ||
73 | enum { | |
74 | ARG_VERSION = 0x100, | |
ba768916 | 75 | ARG_ADDRESS, |
6a010ac9 | 76 | ARG_DROP_PRIVILEGES, |
2e2b3608 | 77 | ARG_CONFIGURATION, |
7f0d207d | 78 | ARG_MACHINE, |
71008e18 DM |
79 | }; |
80 | ||
81 | static const struct option options[] = { | |
6a010ac9 LP |
82 | { "help", no_argument, NULL, 'h' }, |
83 | { "version", no_argument, NULL, ARG_VERSION }, | |
84 | { "address", required_argument, NULL, ARG_ADDRESS }, | |
85 | { "drop-privileges", no_argument, NULL, ARG_DROP_PRIVILEGES }, | |
2e2b3608 | 86 | { "configuration", required_argument, NULL, ARG_CONFIGURATION }, |
7f0d207d LP |
87 | { "machine", required_argument, NULL, ARG_MACHINE }, |
88 | {}, | |
71008e18 DM |
89 | }; |
90 | ||
2e2b3608 | 91 | int c, r; |
71008e18 DM |
92 | |
93 | assert(argc >= 0); | |
94 | assert(argv); | |
95 | ||
2dc38ed0 | 96 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { |
71008e18 DM |
97 | |
98 | switch (c) { | |
99 | ||
100 | case 'h': | |
101 | help(); | |
102 | return 0; | |
103 | ||
104 | case ARG_VERSION: | |
105 | puts(PACKAGE_STRING); | |
106 | puts(SYSTEMD_FEATURES); | |
107 | return 0; | |
108 | ||
7f0d207d LP |
109 | case ARG_ADDRESS: { |
110 | char *a; | |
111 | ||
112 | a = strdup(optarg); | |
113 | if (!a) | |
114 | return log_oom(); | |
115 | ||
116 | free(arg_address); | |
117 | arg_address = a; | |
ba768916 | 118 | break; |
7f0d207d | 119 | } |
ba768916 | 120 | |
6a010ac9 LP |
121 | case ARG_DROP_PRIVILEGES: |
122 | arg_drop_privileges = true; | |
123 | break; | |
124 | ||
2e2b3608 LP |
125 | case ARG_CONFIGURATION: |
126 | r = strv_extend(&arg_configuration, optarg); | |
127 | if (r < 0) | |
128 | return log_oom(); | |
129 | break; | |
130 | ||
7f0d207d LP |
131 | case ARG_MACHINE: { |
132 | _cleanup_free_ char *e = NULL; | |
133 | char *a; | |
134 | ||
135 | e = bus_address_escape(optarg); | |
136 | if (!e) | |
137 | return log_oom(); | |
138 | ||
139 | #ifdef ENABLE_KDBUS | |
140 | a = strjoin("x-container-kernel:machine=", e, ";x-container-unix:machine=", e, NULL); | |
141 | #else | |
142 | a = strjoin("x-container-unix:machine=", e, NULL); | |
143 | #endif | |
144 | if (!a) | |
145 | return log_oom(); | |
146 | ||
147 | free(arg_address); | |
148 | arg_address = a; | |
149 | ||
150 | break; | |
151 | } | |
152 | ||
71008e18 DM |
153 | case '?': |
154 | return -EINVAL; | |
155 | ||
71008e18 | 156 | default: |
ba768916 | 157 | assert_not_reached("Unhandled option"); |
71008e18 DM |
158 | } |
159 | } | |
160 | ||
0721804f LP |
161 | /* If the first command line argument is only "x" characters |
162 | * we'll write who we are talking to into it, so that "ps" is | |
163 | * explanatory */ | |
164 | arg_command_line_buffer = argv[optind]; | |
7f0d207d | 165 | if (argc > optind + 1 || (arg_command_line_buffer && !in_charset(arg_command_line_buffer, "x"))) { |
0721804f LP |
166 | log_error("Too many arguments"); |
167 | return -EINVAL; | |
168 | } | |
169 | ||
7f0d207d LP |
170 | if (!arg_address) { |
171 | arg_address = strdup(DEFAULT_SYSTEM_BUS_PATH); | |
172 | if (!arg_address) | |
173 | return log_oom(); | |
174 | } | |
175 | ||
71008e18 DM |
176 | return 1; |
177 | } | |
a8f11321 | 178 | |
758bf0c7 | 179 | static int rename_service(sd_bus *a, sd_bus *b) { |
a7639e37 LP |
180 | _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; |
181 | _cleanup_free_ char *p = NULL, *name = NULL; | |
182 | const char *comm; | |
183 | char **cmdline; | |
184 | uid_t uid; | |
185 | pid_t pid; | |
186 | int r; | |
187 | ||
758bf0c7 | 188 | assert(a); |
a7639e37 LP |
189 | assert(b); |
190 | ||
191 | r = sd_bus_get_peer_creds(b, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_CMDLINE|SD_BUS_CREDS_COMM, &creds); | |
192 | if (r < 0) | |
193 | return r; | |
194 | ||
195 | r = sd_bus_creds_get_uid(creds, &uid); | |
196 | if (r < 0) | |
197 | return r; | |
198 | ||
199 | r = sd_bus_creds_get_pid(creds, &pid); | |
200 | if (r < 0) | |
201 | return r; | |
202 | ||
203 | r = sd_bus_creds_get_cmdline(creds, &cmdline); | |
204 | if (r < 0) | |
205 | return r; | |
206 | ||
207 | r = sd_bus_creds_get_comm(creds, &comm); | |
208 | if (r < 0) | |
209 | return r; | |
210 | ||
211 | name = uid_to_name(uid); | |
212 | if (!name) | |
213 | return -ENOMEM; | |
214 | ||
215 | p = strv_join(cmdline, " "); | |
216 | if (!p) | |
217 | return -ENOMEM; | |
218 | ||
219 | /* The status string gets the full command line ... */ | |
220 | sd_notifyf(false, | |
ccd06097 ZJS |
221 | "STATUS=Processing requests from client PID "PID_FMT" (%s); UID "UID_FMT" (%s)", |
222 | pid, p, | |
223 | uid, name); | |
a7639e37 LP |
224 | |
225 | /* ... and the argv line only the short comm */ | |
226 | if (arg_command_line_buffer) { | |
227 | size_t m, w; | |
228 | ||
229 | m = strlen(arg_command_line_buffer); | |
230 | w = snprintf(arg_command_line_buffer, m, | |
ccd06097 ZJS |
231 | "[PID "PID_FMT"/%s; UID "UID_FMT"/%s]", |
232 | pid, comm, | |
233 | uid, name); | |
a7639e37 LP |
234 | |
235 | if (m > w) | |
29804cc1 | 236 | memzero(arg_command_line_buffer + w, m - w); |
a7639e37 LP |
237 | } |
238 | ||
ccd06097 ZJS |
239 | log_debug("Running on behalf of PID "PID_FMT" (%s), UID "UID_FMT" (%s), %s", |
240 | pid, p, | |
241 | uid, name, | |
758bf0c7 LP |
242 | a->unique_name); |
243 | ; | |
a7639e37 LP |
244 | return 0; |
245 | } | |
246 | ||
247 | static int synthesize_name_acquired(sd_bus *a, sd_bus *b, sd_bus_message *m) { | |
248 | _cleanup_bus_message_unref_ sd_bus_message *n = NULL; | |
249 | const char *name, *old_owner, *new_owner; | |
250 | int r; | |
251 | ||
252 | assert(a); | |
253 | assert(b); | |
254 | assert(m); | |
255 | ||
256 | /* If we get NameOwnerChanged for our own name, we need to | |
257 | * synthesize NameLost/NameAcquired, since socket clients need | |
258 | * that, even though it is obsoleted on kdbus */ | |
259 | ||
260 | if (!a->is_kernel) | |
261 | return 0; | |
262 | ||
263 | if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") || | |
264 | !streq_ptr(m->path, "/org/freedesktop/DBus") || | |
265 | !streq_ptr(m->sender, "org.freedesktop.DBus")) | |
266 | return 0; | |
267 | ||
268 | r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner); | |
269 | if (r < 0) | |
270 | return r; | |
271 | ||
272 | r = sd_bus_message_rewind(m, true); | |
273 | if (r < 0) | |
274 | return r; | |
275 | ||
276 | if (streq(old_owner, a->unique_name)) { | |
277 | ||
278 | r = sd_bus_message_new_signal( | |
279 | b, | |
151b9b96 | 280 | &n, |
a7639e37 LP |
281 | "/org/freedesktop/DBus", |
282 | "org.freedesktop.DBus", | |
151b9b96 | 283 | "NameLost"); |
a7639e37 LP |
284 | |
285 | } else if (streq(new_owner, a->unique_name)) { | |
286 | ||
287 | r = sd_bus_message_new_signal( | |
288 | b, | |
151b9b96 | 289 | &n, |
a7639e37 LP |
290 | "/org/freedesktop/DBus", |
291 | "org.freedesktop.DBus", | |
151b9b96 | 292 | "NameAcquired"); |
a7639e37 LP |
293 | } else |
294 | return 0; | |
295 | ||
296 | if (r < 0) | |
297 | return r; | |
298 | ||
299 | r = sd_bus_message_append(n, "s", name); | |
300 | if (r < 0) | |
301 | return r; | |
302 | ||
303 | r = bus_message_append_sender(n, "org.freedesktop.DBus"); | |
304 | if (r < 0) | |
305 | return r; | |
306 | ||
307 | r = bus_seal_synthetic_message(b, n); | |
308 | if (r < 0) | |
309 | return r; | |
310 | ||
311 | return sd_bus_send(b, n, NULL); | |
312 | } | |
313 | ||
c2595875 LP |
314 | static int process_policy(sd_bus *a, sd_bus *b, sd_bus_message *m) { |
315 | _cleanup_bus_message_unref_ sd_bus_message *n = NULL; | |
316 | int r; | |
317 | ||
318 | assert(a); | |
319 | assert(b); | |
320 | assert(m); | |
321 | ||
62bb05f6 LP |
322 | if (!a->is_kernel) |
323 | return 0; | |
324 | ||
c2595875 LP |
325 | if (!sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "GetAll")) |
326 | return 0; | |
327 | ||
328 | if (!streq_ptr(m->path, "/org/gnome/DisplayManager/Slave")) | |
329 | return 0; | |
330 | ||
331 | r = sd_bus_message_new_method_errorf(m, &n, SD_BUS_ERROR_ACCESS_DENIED, "gdm, you are stupid"); | |
332 | if (r < 0) | |
333 | return r; | |
334 | ||
335 | r = bus_message_append_sender(n, "org.freedesktop.DBus"); | |
336 | if (r < 0) { | |
337 | log_error("Failed to append sender to gdm reply: %s", strerror(-r)); | |
338 | return r; | |
339 | } | |
340 | ||
341 | r = bus_seal_synthetic_message(b, n); | |
342 | if (r < 0) { | |
343 | log_error("Failed to seal gdm reply: %s", strerror(-r)); | |
344 | return r; | |
345 | } | |
346 | ||
347 | r = sd_bus_send(b, n, NULL); | |
348 | if (r < 0) { | |
349 | log_error("Failed to send gdm reply: %s", strerror(-r)); | |
350 | return r; | |
351 | } | |
352 | ||
353 | return 1; | |
354 | } | |
355 | ||
2f1a3d08 LP |
356 | static int synthetic_driver_send(sd_bus *b, sd_bus_message *m) { |
357 | int r; | |
358 | ||
359 | assert(b); | |
360 | assert(m); | |
361 | ||
362 | r = bus_message_append_sender(m, "org.freedesktop.DBus"); | |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | r = bus_seal_synthetic_message(b, m); | |
367 | if (r < 0) | |
368 | return r; | |
369 | ||
370 | return sd_bus_send(b, m, NULL); | |
371 | } | |
372 | ||
373 | static int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) { | |
374 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
375 | int r; | |
376 | ||
377 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
378 | return 0; | |
379 | ||
380 | r = sd_bus_message_new_method_error(call, &m, e); | |
381 | if (r < 0) | |
382 | return r; | |
383 | ||
384 | return synthetic_driver_send(call->bus, m); | |
385 | } | |
386 | ||
387 | static int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) { | |
388 | ||
389 | _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL; | |
390 | ||
391 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
392 | return 0; | |
393 | ||
394 | if (sd_bus_error_is_set(p)) | |
395 | return synthetic_reply_method_error(call, p); | |
396 | ||
397 | sd_bus_error_set_errno(&berror, error); | |
398 | ||
399 | return synthetic_reply_method_error(call, &berror); | |
400 | } | |
401 | ||
402 | static int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) { | |
2f1a3d08 LP |
403 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
404 | int r; | |
405 | ||
406 | if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) | |
407 | return 0; | |
408 | ||
409 | r = sd_bus_message_new_method_return(call, &m); | |
410 | if (r < 0) | |
411 | return r; | |
412 | ||
413 | if (!isempty(types)) { | |
414 | va_list ap; | |
415 | ||
416 | va_start(ap, types); | |
417 | r = bus_message_append_ap(m, types, ap); | |
418 | va_end(ap); | |
419 | if (r < 0) | |
420 | return r; | |
421 | } | |
422 | ||
423 | return synthetic_driver_send(call->bus, m); | |
424 | } | |
425 | ||
dc780ecf KS |
426 | static int synthetic_reply_return_strv(sd_bus_message *call, char **l) { |
427 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
428 | int r; | |
429 | ||
430 | r = sd_bus_message_new_method_return(call, &m); | |
431 | if (r < 0) | |
432 | return synthetic_reply_method_errno(call, r, NULL); | |
433 | ||
434 | r = sd_bus_message_append_strv(m, l); | |
435 | if (r < 0) | |
436 | return synthetic_reply_method_errno(call, r, NULL); | |
437 | ||
438 | return synthetic_driver_send(call->bus, m); | |
439 | } | |
440 | ||
441 | static int get_creds_by_name(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) { | |
442 | _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL; | |
443 | int r; | |
444 | ||
445 | assert(bus); | |
446 | assert(name); | |
447 | assert(_creds); | |
448 | ||
449 | assert_return(service_name_is_valid(name), -EINVAL); | |
450 | ||
451 | r = sd_bus_get_owner(bus, name, mask, &c); | |
452 | if (r == -ESRCH || r == -ENXIO) | |
453 | return sd_bus_error_setf(error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", name); | |
454 | if (r < 0) | |
455 | return r; | |
456 | ||
457 | if ((c->mask & mask) != mask) | |
458 | return -ENOTSUP; | |
459 | ||
460 | *_creds = c; | |
461 | c = NULL; | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | static int get_creds_by_message(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) { | |
467 | const char *name; | |
468 | int r; | |
469 | ||
470 | assert(bus); | |
471 | assert(m); | |
472 | assert(_creds); | |
473 | ||
474 | r = sd_bus_message_read(m, "s", &name); | |
475 | if (r < 0) | |
476 | return r; | |
477 | ||
478 | return get_creds_by_name(bus, name, mask, _creds, error); | |
479 | } | |
480 | ||
481 | static int peer_is_privileged(sd_bus *bus, sd_bus_message *m) { | |
482 | _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; | |
483 | uid_t uid; | |
484 | int r; | |
485 | ||
486 | r = get_creds_by_message(bus, m, SD_BUS_CREDS_UID, &creds, NULL); | |
487 | if (r < 0) | |
488 | return r; | |
489 | ||
490 | r = sd_bus_creds_get_uid(creds, &uid); | |
491 | if (r < 0) | |
492 | return r; | |
493 | ||
494 | r = sd_bus_creds_has_effective_cap(creds, CAP_SYS_ADMIN); | |
495 | if (r > 0) | |
496 | return true; | |
497 | ||
498 | if (uid == getuid()) | |
499 | return true; | |
500 | ||
501 | return false; | |
502 | } | |
503 | ||
2a0abe5b LP |
504 | static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) { |
505 | int r; | |
506 | ||
507 | assert(a); | |
508 | assert(b); | |
509 | assert(m); | |
510 | ||
62bb05f6 LP |
511 | if (!a->is_kernel) |
512 | return 0; | |
513 | ||
2a0abe5b LP |
514 | if (!streq_ptr(sd_bus_message_get_destination(m), "org.freedesktop.DBus")) |
515 | return 0; | |
516 | ||
dc780ecf KS |
517 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { |
518 | if (0 && !isempty(sd_bus_message_get_signature(m, true))) { | |
519 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
520 | ||
521 | r = sd_bus_error_setf(&error, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
522 | ||
523 | return synthetic_reply_method_errno(m, r, &error); | |
524 | } | |
525 | ||
526 | return synthetic_reply_method_return(m, "s", | |
527 | "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" " | |
528 | "\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n" | |
529 | "<node>\n" | |
530 | " <interface name=\"org.freedesktop.DBus.Introspectable\">\n" | |
531 | " <method name=\"Introspect\">\n" | |
532 | " <arg name=\"data\" type=\"s\" direction=\"out\"/>\n" | |
533 | " </method>\n" | |
534 | " </interface>\n" | |
535 | " <interface name=\"org.freedesktop.DBus\">\n" | |
536 | " <method name=\"AddMatch\">\n" | |
537 | " <arg type=\"s\" direction=\"in\"/>\n" | |
538 | " </method>\n" | |
539 | " <method name=\"RemoveMatch\">\n" | |
540 | " <arg type=\"s\" direction=\"in\"/>\n" | |
541 | " </method>\n" | |
542 | " <method name=\"GetConnectionSELinuxSecurityContext\">\n" | |
543 | " <arg type=\"s\" direction=\"in\"/>\n" | |
544 | " <arg type=\"ay\" direction=\"out\"/>\n" | |
545 | " </method>\n" | |
546 | " <method name=\"GetConnectionUnixProcessID\">\n" | |
547 | " <arg type=\"s\" direction=\"in\"/>\n" | |
548 | " <arg type=\"u\" direction=\"out\"/>\n" | |
549 | " </method>\n" | |
550 | " <method name=\"GetConnectionUnixUser\">\n" | |
551 | " <arg type=\"s\" direction=\"in\"/>\n" | |
552 | " <arg type=\"u\" direction=\"out\"/>\n" | |
553 | " </method>\n" | |
554 | " <method name=\"GetId\">\n" | |
555 | " <arg type=\"s\" direction=\"out\"/>\n" | |
556 | " </method>\n" | |
557 | " <method name=\"GetNameOwner\">\n" | |
558 | " <arg type=\"s\" direction=\"in\"/>\n" | |
559 | " <arg type=\"s\" direction=\"out\"/>\n" | |
560 | " </method>\n" | |
561 | " <method name=\"Hello\">\n" | |
562 | " <arg type=\"s\" direction=\"out\"/>\n" | |
563 | " </method>\n" | |
564 | " <method name=\"ListActivatableNames\">\n" | |
565 | " <arg type=\"as\" direction=\"out\"/>\n" | |
566 | " </method>\n" | |
567 | " <method name=\"ListNames\">\n" | |
568 | " <arg type=\"as\" direction=\"out\"/>\n" | |
569 | " </method>\n" | |
570 | " <method name=\"ListQueuedOwners\">\n" | |
571 | " <arg type=\"s\" direction=\"in\"/>\n" | |
572 | " <arg type=\"as\" direction=\"out\"/>\n" | |
573 | " </method>\n" | |
574 | " <method name=\"NameHasOwner\">\n" | |
575 | " <arg type=\"s\" direction=\"in\"/>\n" | |
576 | " <arg type=\"b\" direction=\"out\"/>\n" | |
577 | " </method>\n" | |
578 | " <method name=\"ReleaseName\">\n" | |
579 | " <arg type=\"s\" direction=\"in\"/>\n" | |
580 | " <arg type=\"u\" direction=\"out\"/>\n" | |
581 | " </method>\n" | |
582 | " <method name=\"ReloadConfig\">\n" | |
583 | " </method>\n" | |
584 | " <method name=\"RequestName\">\n" | |
585 | " <arg type=\"s\" direction=\"in\"/>\n" | |
586 | " <arg type=\"u\" direction=\"in\"/>\n" | |
587 | " <arg type=\"u\" direction=\"out\"/>\n" | |
588 | " </method>\n" | |
589 | " <method name=\"StartServiceByName\">\n" | |
590 | " <arg type=\"s\" direction=\"in\"/>\n" | |
591 | " <arg type=\"u\" direction=\"in\"/>\n" | |
592 | " <arg type=\"u\" direction=\"out\"/>\n" | |
593 | " </method>\n" | |
594 | " <method name=\"UpdateActivationEnvironment\">\n" | |
595 | " <arg type=\"a{ss}\" direction=\"in\"/>\n" | |
596 | " </method>\n" | |
597 | " <signal name=\"NameAcquired\">\n" | |
598 | " <arg type=\"s\"/>\n" | |
599 | " </signal>\n" | |
600 | " <signal name=\"NameLost\">\n" | |
601 | " <arg type=\"s\"/>\n" | |
602 | " </signal>\n" | |
603 | " <signal name=\"NameOwnerChanged\">\n" | |
604 | " <arg type=\"s\"/>\n" | |
605 | " <arg type=\"s\"/>\n" | |
606 | " <arg type=\"s\"/>\n" | |
607 | " </signal>\n" | |
608 | " </interface>\n" | |
609 | "</node>\n"); | |
610 | ||
611 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) { | |
2a0abe5b LP |
612 | const char *match; |
613 | ||
614 | r = sd_bus_message_read(m, "s", &match); | |
615 | if (r < 0) | |
2f1a3d08 | 616 | return synthetic_reply_method_errno(m, r, NULL); |
2a0abe5b | 617 | |
19befb2d | 618 | r = sd_bus_add_match(a, NULL, match, NULL, NULL); |
2a0abe5b | 619 | if (r < 0) |
2f1a3d08 | 620 | return synthetic_reply_method_errno(m, r, NULL); |
2a0abe5b | 621 | |
2f1a3d08 | 622 | return synthetic_reply_method_return(m, NULL); |
2a0abe5b LP |
623 | |
624 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RemoveMatch")) { | |
625 | const char *match; | |
626 | ||
627 | r = sd_bus_message_read(m, "s", &match); | |
628 | if (r < 0) | |
2f1a3d08 | 629 | return synthetic_reply_method_errno(m, r, NULL); |
2a0abe5b | 630 | |
19befb2d LP |
631 | r = bus_remove_match_by_string(a, match, NULL, NULL); |
632 | if (r == 0) | |
633 | return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_MATCH_RULE_NOT_FOUND, "Match rule not found")); | |
2a0abe5b | 634 | if (r < 0) |
2f1a3d08 | 635 | return synthetic_reply_method_errno(m, r, NULL); |
2a0abe5b | 636 | |
2f1a3d08 | 637 | return synthetic_reply_method_return(m, NULL); |
2a0abe5b | 638 | |
dc780ecf KS |
639 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionSELinuxSecurityContext")) { |
640 | _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; | |
641 | ||
642 | r = get_creds_by_message(a, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, NULL); | |
643 | if (r < 0) | |
644 | return synthetic_reply_method_errno(m, r, NULL); | |
645 | ||
646 | return synthetic_reply_method_return(m, "y", creds->label, strlen(creds->label)); | |
647 | ||
648 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixProcessID")) { | |
649 | _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; | |
650 | ||
651 | r = get_creds_by_message(a, m, SD_BUS_CREDS_PID, &creds, NULL); | |
652 | if (r < 0) | |
653 | return synthetic_reply_method_errno(m, r, NULL); | |
654 | ||
655 | return synthetic_reply_method_return(m, "u", (uint32_t) creds->pid); | |
656 | ||
657 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixUser")) { | |
658 | _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; | |
659 | ||
660 | r = get_creds_by_message(a, m, SD_BUS_CREDS_UID, &creds, NULL); | |
661 | if (r < 0) | |
662 | return synthetic_reply_method_errno(m, r, NULL); | |
663 | ||
664 | return synthetic_reply_method_return(m, "u", (uint32_t) creds->uid); | |
665 | ||
666 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetId")) { | |
667 | sd_id128_t server_id; | |
668 | char buf[SD_ID128_STRING_MAX]; | |
669 | ||
670 | r = sd_bus_get_server_id(a, &server_id); | |
671 | if (r < 0) | |
672 | return synthetic_reply_method_errno(m, r, NULL); | |
673 | ||
674 | return synthetic_reply_method_return(m, "s", sd_id128_to_string(server_id, buf)); | |
675 | ||
676 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetNameOwner")) { | |
677 | const char *name; | |
678 | _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; | |
679 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
680 | ||
681 | r = sd_bus_message_read(m, "s", &name); | |
682 | if (r < 0) | |
683 | return synthetic_reply_method_errno(m, r, NULL); | |
684 | ||
685 | if (streq(name, "org.freedesktop.DBus")) | |
686 | return synthetic_reply_method_return(m, "s", "org.freedesktop.DBus"); | |
687 | ||
688 | r = get_creds_by_name(a, name, SD_BUS_CREDS_UNIQUE_NAME, &creds, &error); | |
689 | if (r < 0) | |
690 | return synthetic_reply_method_errno(m, r, &error); | |
691 | ||
692 | return synthetic_reply_method_return(m, "s", creds->unique_name); | |
693 | ||
694 | /* "Hello" is handled in process_hello() */ | |
695 | ||
696 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) { | |
697 | _cleanup_strv_free_ char **names = NULL; | |
698 | ||
699 | r = sd_bus_list_names(a, NULL, &names); | |
700 | if (r < 0) | |
701 | return synthetic_reply_method_errno(m, r, NULL); | |
702 | ||
703 | /* Let's sort the names list to make it stable */ | |
704 | strv_sort(names); | |
705 | ||
706 | return synthetic_reply_return_strv(m, names); | |
707 | ||
708 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListNames")) { | |
709 | _cleanup_strv_free_ char **names = NULL; | |
710 | ||
711 | r = sd_bus_list_names(a, &names, NULL); | |
712 | if (r < 0) | |
713 | return synthetic_reply_method_errno(m, r, NULL); | |
714 | ||
715 | r = strv_extend(&names, "org.freedesktop.DBus"); | |
716 | if (r < 0) | |
717 | return synthetic_reply_method_errno(m, r, NULL); | |
718 | ||
719 | /* Let's sort the names list to make it stable */ | |
720 | strv_sort(names); | |
721 | ||
722 | return synthetic_reply_return_strv(m, names); | |
723 | ||
724 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListQueuedOwners")) { | |
725 | struct kdbus_cmd_name_list cmd = {}; | |
726 | struct kdbus_name_list *name_list; | |
727 | struct kdbus_cmd_name *name; | |
728 | _cleanup_strv_free_ char **owners = NULL; | |
729 | char *arg0; | |
730 | int err = 0; | |
731 | ||
732 | r = sd_bus_message_read(m, "s", &arg0); | |
733 | if (r < 0) | |
734 | return synthetic_reply_method_errno(m, r, NULL); | |
735 | ||
736 | if (service_name_is_valid(arg0) < 0) | |
737 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
738 | ||
739 | cmd.flags = KDBUS_NAME_LIST_QUEUED; | |
740 | r = ioctl(a->input_fd, KDBUS_CMD_NAME_LIST, &cmd); | |
741 | if (r < 0) | |
742 | return synthetic_reply_method_errno(m, -errno, NULL); | |
743 | ||
744 | name_list = (struct kdbus_name_list *) ((uint8_t *) a->kdbus_buffer + cmd.offset); | |
745 | ||
746 | KDBUS_ITEM_FOREACH(name, name_list, names) { | |
747 | char *n; | |
748 | ||
749 | if (name->size <= sizeof(*name)) | |
750 | continue; | |
751 | ||
752 | if (!streq(name->name, arg0)) | |
753 | continue; | |
754 | ||
755 | if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0) { | |
756 | err = -ENOMEM; | |
757 | break; | |
758 | } | |
759 | ||
760 | r = strv_consume(&owners, n); | |
761 | if (r < 0) { | |
762 | err = r; | |
763 | break; | |
764 | } | |
765 | } | |
766 | ||
767 | r = ioctl(a->input_fd, KDBUS_CMD_FREE, &cmd.offset); | |
768 | if (r < 0) | |
769 | return synthetic_reply_method_errno(m, r, NULL); | |
770 | ||
eb17e178 | 771 | if (err < 0) |
dc780ecf KS |
772 | return synthetic_reply_method_errno(m, err, NULL); |
773 | ||
774 | return synthetic_reply_return_strv(m, owners); | |
775 | ||
776 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "NameHasOwner")) { | |
777 | const char *name; | |
778 | ||
779 | r = sd_bus_message_read(m, "s", &name); | |
780 | if (r < 0) | |
781 | return synthetic_reply_method_errno(m, r, NULL); | |
782 | ||
783 | if (service_name_is_valid(name) < 0) | |
784 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
785 | ||
786 | if (streq(name, "org.freedesktop.DBus")) | |
787 | return synthetic_reply_method_return(m, "b", true); | |
788 | ||
789 | r = sd_bus_get_owner(a, name, 0, NULL); | |
790 | if (r < 0 && r != -ESRCH && r != -ENXIO) | |
791 | return synthetic_reply_method_errno(m, r, NULL); | |
792 | ||
793 | return synthetic_reply_method_return(m, "b", r >= 0); | |
794 | ||
795 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReleaseName")) { | |
796 | const char *name; | |
797 | ||
798 | r = sd_bus_message_read(m, "s", &name); | |
799 | if (r < 0) | |
800 | return synthetic_reply_method_errno(m, r, NULL); | |
801 | ||
802 | if (service_name_is_valid(name) < 0) | |
803 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
804 | ||
805 | r = sd_bus_release_name(a, name); | |
806 | if (r < 0) { | |
807 | if (r == -ESRCH) | |
19befb2d | 808 | return synthetic_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT); |
dc780ecf | 809 | if (r == -EADDRINUSE) |
19befb2d LP |
810 | return synthetic_reply_method_return(m, "u", BUS_NAME_NOT_OWNER); |
811 | ||
dc780ecf KS |
812 | return synthetic_reply_method_errno(m, r, NULL); |
813 | } | |
814 | ||
815 | return synthetic_reply_method_return(m, "u", BUS_NAME_RELEASED); | |
816 | ||
817 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReloadConfig")) { | |
818 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
819 | ||
820 | r = sd_bus_error_setf(&error, SD_BUS_ERROR_NOT_SUPPORTED, "%s() is not supported", sd_bus_message_get_member(m)); | |
821 | ||
822 | return synthetic_reply_method_errno(m, r, &error); | |
823 | ||
824 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RequestName")) { | |
825 | const char *name; | |
826 | uint32_t flags; | |
827 | ||
828 | r = sd_bus_message_read(m, "su", &name, &flags); | |
829 | if (r < 0) | |
830 | return synthetic_reply_method_errno(m, r, NULL); | |
831 | ||
832 | if (service_name_is_valid(name) < 0) | |
833 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
834 | if ((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) != 0) | |
835 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
836 | ||
837 | r = sd_bus_request_name(a, name, flags); | |
838 | if (r < 0) { | |
839 | if (r == -EEXIST) | |
840 | return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS); | |
841 | if (r == -EALREADY) | |
842 | return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER); | |
843 | return synthetic_reply_method_errno(m, r, NULL); | |
844 | } | |
845 | ||
846 | if (r == 0) | |
847 | return synthetic_reply_method_return(m, "u", BUS_NAME_IN_QUEUE); | |
848 | ||
849 | return synthetic_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER); | |
850 | ||
851 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "StartServiceByName")) { | |
852 | _cleanup_bus_message_unref_ sd_bus_message *msg = NULL; | |
853 | const char *name; | |
854 | uint32_t flags; | |
855 | ||
856 | r = sd_bus_message_read(m, "su", &name, &flags); | |
857 | if (r < 0) | |
858 | return synthetic_reply_method_errno(m, r, NULL); | |
859 | ||
860 | if (service_name_is_valid(name) < 0) | |
861 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
862 | if (flags != 0) | |
863 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
864 | ||
865 | r = sd_bus_get_owner(a, name, 0, NULL); | |
866 | if (r >= 0 || streq(name, "org.freedesktop.DBus")) | |
867 | return synthetic_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING); | |
868 | if (r != -ESRCH) | |
869 | return synthetic_reply_method_errno(m, r, NULL); | |
870 | ||
871 | r = sd_bus_message_new_method_call( | |
872 | a, | |
873 | &msg, | |
874 | name, | |
875 | "/", | |
876 | "org.freedesktop.DBus.Peer", | |
877 | "Ping"); | |
878 | if (r < 0) | |
879 | return synthetic_reply_method_errno(m, r, NULL); | |
880 | ||
881 | r = sd_bus_send(a, msg, NULL); | |
882 | if (r < 0) | |
883 | return synthetic_reply_method_errno(m, r, NULL); | |
884 | ||
885 | return synthetic_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS); | |
886 | ||
887 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "UpdateActivationEnvironment")) { | |
888 | _cleanup_bus_message_unref_ sd_bus_message *msg = NULL; | |
889 | _cleanup_strv_free_ char **args = NULL; | |
890 | ||
891 | if (!peer_is_privileged(a, m)) | |
892 | return synthetic_reply_method_errno(m, -EPERM, NULL); | |
893 | ||
894 | r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{ss}"); | |
895 | if (r < 0) | |
896 | return synthetic_reply_method_errno(m, r, NULL); | |
897 | ||
898 | while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "ss")) > 0) { | |
899 | _cleanup_free_ char *s = NULL; | |
900 | const char *key; | |
901 | const char *value; | |
902 | ||
903 | r = sd_bus_message_read(m, "ss", &key, &value); | |
904 | if (r < 0) | |
905 | return synthetic_reply_method_errno(m, r, NULL); | |
906 | ||
907 | s = strjoin(key, "=", value, NULL); | |
908 | if (!s) | |
909 | return synthetic_reply_method_errno(m, -ENOMEM, NULL); | |
910 | ||
911 | r = strv_extend(&args, s); | |
912 | if (r < 0) | |
913 | return synthetic_reply_method_errno(m, r, NULL); | |
914 | ||
915 | r = sd_bus_message_exit_container(m); | |
916 | if (r < 0) | |
917 | return synthetic_reply_method_errno(m, r, NULL); | |
918 | } | |
919 | ||
920 | r = sd_bus_message_exit_container(m); | |
921 | if (r < 0) | |
922 | return synthetic_reply_method_errno(m, r, NULL); | |
923 | ||
924 | if (!args) | |
925 | return synthetic_reply_method_errno(m, -EINVAL, NULL); | |
926 | ||
927 | r = sd_bus_message_new_method_call( | |
928 | a, | |
929 | &msg, | |
930 | "org.freedesktop.systemd1", | |
931 | "/org/freedesktop/systemd1", | |
932 | "org.freedesktop.systemd1.Manager", | |
933 | "SetEnvironment"); | |
934 | if (r < 0) | |
935 | return synthetic_reply_method_errno(m, r, NULL); | |
936 | ||
937 | r = sd_bus_message_append_strv(msg, args); | |
938 | if (r < 0) | |
939 | return synthetic_reply_method_errno(m, r, NULL); | |
940 | ||
941 | r = sd_bus_call(a, msg, 0, NULL, NULL); | |
942 | if (r < 0) | |
943 | return synthetic_reply_method_errno(m, r, NULL); | |
944 | ||
945 | return synthetic_reply_method_return(m, NULL); | |
946 | ||
947 | } else { | |
948 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
949 | ||
950 | r = sd_bus_error_setf(&error, SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method '%s'.", m->member); | |
951 | ||
952 | return synthetic_reply_method_errno(m, r, &error); | |
953 | } | |
2a0abe5b LP |
954 | } |
955 | ||
a7639e37 LP |
956 | static int process_hello(sd_bus *a, sd_bus *b, sd_bus_message *m, bool *got_hello) { |
957 | _cleanup_bus_message_unref_ sd_bus_message *n = NULL; | |
958 | bool is_hello; | |
959 | int r; | |
960 | ||
961 | assert(a); | |
962 | assert(b); | |
963 | assert(m); | |
964 | assert(got_hello); | |
965 | ||
966 | /* As reaction to hello we need to respond with two messages: | |
967 | * the callback reply and the NameAcquired for the unique | |
968 | * name, since hello is otherwise obsolete on kdbus. */ | |
969 | ||
970 | is_hello = | |
971 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "Hello") && | |
972 | streq_ptr(m->destination, "org.freedesktop.DBus"); | |
973 | ||
974 | if (!is_hello) { | |
975 | ||
976 | if (*got_hello) | |
977 | return 0; | |
978 | ||
979 | log_error("First packet isn't hello (it's %s.%s), aborting.", m->interface, m->member); | |
980 | return -EIO; | |
981 | } | |
982 | ||
983 | if (*got_hello) { | |
984 | log_error("Got duplicate hello, aborting."); | |
985 | return -EIO; | |
986 | } | |
987 | ||
988 | *got_hello = true; | |
989 | ||
990 | if (!a->is_kernel) | |
991 | return 0; | |
992 | ||
993 | r = sd_bus_message_new_method_return(m, &n); | |
994 | if (r < 0) { | |
995 | log_error("Failed to generate HELLO reply: %s", strerror(-r)); | |
996 | return r; | |
997 | } | |
998 | ||
999 | r = sd_bus_message_append(n, "s", a->unique_name); | |
1000 | if (r < 0) { | |
1001 | log_error("Failed to append unique name to HELLO reply: %s", strerror(-r)); | |
1002 | return r; | |
1003 | } | |
1004 | ||
1005 | r = bus_message_append_sender(n, "org.freedesktop.DBus"); | |
1006 | if (r < 0) { | |
1007 | log_error("Failed to append sender to HELLO reply: %s", strerror(-r)); | |
1008 | return r; | |
1009 | } | |
1010 | ||
1011 | r = bus_seal_synthetic_message(b, n); | |
1012 | if (r < 0) { | |
1013 | log_error("Failed to seal HELLO reply: %s", strerror(-r)); | |
1014 | return r; | |
1015 | } | |
1016 | ||
1017 | r = sd_bus_send(b, n, NULL); | |
1018 | if (r < 0) { | |
1019 | log_error("Failed to send HELLO reply: %s", strerror(-r)); | |
1020 | return r; | |
1021 | } | |
1022 | ||
1023 | n = sd_bus_message_unref(n); | |
1024 | r = sd_bus_message_new_signal( | |
1025 | b, | |
151b9b96 | 1026 | &n, |
a7639e37 LP |
1027 | "/org/freedesktop/DBus", |
1028 | "org.freedesktop.DBus", | |
151b9b96 | 1029 | "NameAcquired"); |
a7639e37 LP |
1030 | if (r < 0) { |
1031 | log_error("Failed to allocate initial NameAcquired message: %s", strerror(-r)); | |
1032 | return r; | |
1033 | } | |
1034 | ||
1035 | r = sd_bus_message_append(n, "s", a->unique_name); | |
1036 | if (r < 0) { | |
1037 | log_error("Failed to append unique name to NameAcquired message: %s", strerror(-r)); | |
1038 | return r; | |
1039 | } | |
1040 | ||
1041 | r = bus_message_append_sender(n, "org.freedesktop.DBus"); | |
1042 | if (r < 0) { | |
1043 | log_error("Failed to append sender to NameAcquired message: %s", strerror(-r)); | |
1044 | return r; | |
1045 | } | |
1046 | ||
1047 | r = bus_seal_synthetic_message(b, n); | |
1048 | if (r < 0) { | |
1049 | log_error("Failed to seal NameAcquired message: %s", strerror(-r)); | |
1050 | return r; | |
1051 | } | |
1052 | ||
1053 | r = sd_bus_send(b, n, NULL); | |
1054 | if (r < 0) { | |
1055 | log_error("Failed to send NameAcquired message: %s", strerror(-r)); | |
1056 | return r; | |
1057 | } | |
1058 | ||
1059 | return 1; | |
1060 | } | |
1061 | ||
7b217f41 LP |
1062 | static int patch_sender(sd_bus *a, sd_bus_message *m) { |
1063 | char **well_known = NULL; | |
1064 | sd_bus_creds *c; | |
1065 | int r; | |
1066 | ||
1067 | assert(a); | |
1068 | assert(m); | |
1069 | ||
1070 | if (!a->is_kernel) | |
1071 | return 0; | |
1072 | ||
1073 | /* We will change the sender of messages from the bus driver | |
1074 | * so that they originate from the bus driver. This is a | |
1075 | * speciality originating from dbus1, where the bus driver did | |
1076 | * not have a unique id, but only the well-known name. */ | |
1077 | ||
1078 | c = sd_bus_message_get_creds(m); | |
1079 | if (!c) | |
1080 | return 0; | |
1081 | ||
1082 | r = sd_bus_creds_get_well_known_names(c, &well_known); | |
1083 | if (r < 0) | |
1084 | return r; | |
1085 | ||
1086 | if (strv_contains(well_known, "org.freedesktop.DBus")) | |
1087 | m->sender = "org.freedesktop.DBus"; | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | ||
a8f11321 | 1092 | int main(int argc, char *argv[]) { |
0721804f | 1093 | |
d51539b1 LP |
1094 | _cleanup_bus_unref_ sd_bus *a = NULL, *b = NULL; |
1095 | sd_id128_t server_id; | |
71008e18 | 1096 | int r, in_fd, out_fd; |
a7639e37 | 1097 | bool got_hello = false; |
0721804f | 1098 | bool is_unix; |
8a0e0ed9 LP |
1099 | struct ucred ucred = {}; |
1100 | _cleanup_free_ char *peersec = NULL; | |
bcf3295d | 1101 | Policy policy = {}; |
a8f11321 | 1102 | |
4cfa2c99 | 1103 | log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); |
a8f11321 LP |
1104 | log_parse_environment(); |
1105 | log_open(); | |
1106 | ||
71008e18 DM |
1107 | r = parse_argv(argc, argv); |
1108 | if (r <= 0) | |
1109 | goto finish; | |
1110 | ||
2e2b3608 | 1111 | r = policy_load(&policy, arg_configuration); |
bcf3295d LP |
1112 | if (r < 0) { |
1113 | log_error("Failed to load policy: %s", strerror(-r)); | |
1114 | goto finish; | |
1115 | } | |
1116 | ||
1117 | /* policy_dump(&policy); */ | |
1118 | ||
71008e18 DM |
1119 | r = sd_listen_fds(0); |
1120 | if (r == 0) { | |
1121 | in_fd = STDIN_FILENO; | |
1122 | out_fd = STDOUT_FILENO; | |
1123 | } else if (r == 1) { | |
1124 | in_fd = SD_LISTEN_FDS_START; | |
1125 | out_fd = SD_LISTEN_FDS_START; | |
1126 | } else { | |
9f6445e3 | 1127 | log_error("Illegal number of file descriptors passed"); |
71008e18 DM |
1128 | goto finish; |
1129 | } | |
1130 | ||
d51539b1 | 1131 | is_unix = |
71008e18 DM |
1132 | sd_is_socket(in_fd, AF_UNIX, 0, 0) > 0 && |
1133 | sd_is_socket(out_fd, AF_UNIX, 0, 0) > 0; | |
d51539b1 | 1134 | |
8a0e0ed9 | 1135 | if (is_unix) { |
eff05270 | 1136 | getpeercred(in_fd, &ucred); |
8a0e0ed9 LP |
1137 | getpeersec(in_fd, &peersec); |
1138 | } | |
1139 | ||
6a010ac9 LP |
1140 | if (arg_drop_privileges) { |
1141 | const char *user = "systemd-bus-proxy"; | |
1142 | uid_t uid; | |
1143 | gid_t gid; | |
1144 | ||
1145 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
1146 | if (r < 0) { | |
1147 | log_error("Cannot resolve user name %s: %s", user, strerror(-r)); | |
1148 | goto finish; | |
1149 | } | |
1150 | ||
1151 | r = drop_privileges(uid, gid, 1ULL << CAP_IPC_OWNER); | |
1152 | if (r < 0) | |
1153 | goto finish; | |
1154 | } | |
1155 | ||
d51539b1 LP |
1156 | r = sd_bus_new(&a); |
1157 | if (r < 0) { | |
1158 | log_error("Failed to allocate bus: %s", strerror(-r)); | |
a8f11321 LP |
1159 | goto finish; |
1160 | } | |
1161 | ||
44b0ed05 LP |
1162 | r = sd_bus_set_name(a, "sd-proxy"); |
1163 | if (r < 0) { | |
1164 | log_error("Failed to set bus name: %s", strerror(-r)); | |
1165 | goto finish; | |
1166 | } | |
1167 | ||
ba768916 | 1168 | r = sd_bus_set_address(a, arg_address); |
d51539b1 LP |
1169 | if (r < 0) { |
1170 | log_error("Failed to set address to connect to: %s", strerror(-r)); | |
1171 | goto finish; | |
1172 | } | |
a8f11321 | 1173 | |
264ad849 | 1174 | r = sd_bus_negotiate_fds(a, is_unix); |
d51539b1 LP |
1175 | if (r < 0) { |
1176 | log_error("Failed to set FD negotiation: %s", strerror(-r)); | |
a8f11321 LP |
1177 | goto finish; |
1178 | } | |
1179 | ||
8a0e0ed9 LP |
1180 | if (ucred.pid > 0) { |
1181 | a->fake_creds.pid = ucred.pid; | |
1182 | a->fake_creds.uid = ucred.uid; | |
1183 | a->fake_creds.gid = ucred.gid; | |
1184 | a->fake_creds_valid = true; | |
1185 | } | |
1186 | ||
373f1422 LP |
1187 | if (peersec) { |
1188 | a->fake_label = peersec; | |
1189 | peersec = NULL; | |
1190 | } | |
8a0e0ed9 | 1191 | |
758bf0c7 LP |
1192 | a->manual_peer_interface = true; |
1193 | ||
d51539b1 LP |
1194 | r = sd_bus_start(a); |
1195 | if (r < 0) { | |
1196 | log_error("Failed to start bus client: %s", strerror(-r)); | |
1197 | goto finish; | |
1198 | } | |
a8f11321 | 1199 | |
d51539b1 LP |
1200 | r = sd_bus_get_server_id(a, &server_id); |
1201 | if (r < 0) { | |
1202 | log_error("Failed to get server ID: %s", strerror(-r)); | |
a8f11321 LP |
1203 | goto finish; |
1204 | } | |
1205 | ||
d51539b1 LP |
1206 | r = sd_bus_new(&b); |
1207 | if (r < 0) { | |
1208 | log_error("Failed to allocate bus: %s", strerror(-r)); | |
1209 | goto finish; | |
1210 | } | |
a8f11321 | 1211 | |
71008e18 | 1212 | r = sd_bus_set_fd(b, in_fd, out_fd); |
d51539b1 LP |
1213 | if (r < 0) { |
1214 | log_error("Failed to set fds: %s", strerror(-r)); | |
1215 | goto finish; | |
1216 | } | |
a8f11321 | 1217 | |
d51539b1 LP |
1218 | r = sd_bus_set_server(b, 1, server_id); |
1219 | if (r < 0) { | |
1220 | log_error("Failed to set server mode: %s", strerror(-r)); | |
1221 | goto finish; | |
1222 | } | |
a8f11321 | 1223 | |
264ad849 | 1224 | r = sd_bus_negotiate_fds(b, is_unix); |
d51539b1 LP |
1225 | if (r < 0) { |
1226 | log_error("Failed to set FD negotiation: %s", strerror(-r)); | |
a8f11321 LP |
1227 | goto finish; |
1228 | } | |
1229 | ||
d51539b1 LP |
1230 | r = sd_bus_set_anonymous(b, true); |
1231 | if (r < 0) { | |
1232 | log_error("Failed to set anonymous authentication: %s", strerror(-r)); | |
1233 | goto finish; | |
1234 | } | |
a8f11321 | 1235 | |
758bf0c7 LP |
1236 | b->manual_peer_interface = true; |
1237 | ||
d51539b1 LP |
1238 | r = sd_bus_start(b); |
1239 | if (r < 0) { | |
1240 | log_error("Failed to start bus client: %s", strerror(-r)); | |
1241 | goto finish; | |
1242 | } | |
a8f11321 | 1243 | |
758bf0c7 | 1244 | r = rename_service(a, b); |
a7639e37 LP |
1245 | if (r < 0) |
1246 | log_debug("Failed to rename process: %s", strerror(-r)); | |
0721804f | 1247 | |
a7639e37 | 1248 | if (a->is_kernel) { |
94a6ce5b | 1249 | _cleanup_free_ char *match = NULL; |
a7639e37 LP |
1250 | const char *unique; |
1251 | ||
1252 | r = sd_bus_get_unique_name(a, &unique); | |
1253 | if (r < 0) { | |
1254 | log_error("Failed to get unique name: %s", strerror(-r)); | |
0721804f LP |
1255 | goto finish; |
1256 | } | |
1257 | ||
a7639e37 LP |
1258 | match = strjoin("type='signal'," |
1259 | "sender='org.freedesktop.DBus'," | |
1260 | "path='/org/freedesktop/DBus'," | |
1261 | "interface='org.freedesktop.DBus'," | |
1262 | "member='NameOwnerChanged'," | |
1263 | "arg1='", | |
1264 | unique, | |
1265 | "'", | |
1266 | NULL); | |
1267 | if (!match) { | |
1268 | log_oom(); | |
0721804f LP |
1269 | goto finish; |
1270 | } | |
1271 | ||
19befb2d | 1272 | r = sd_bus_add_match(a, NULL, match, NULL, NULL); |
a7639e37 LP |
1273 | if (r < 0) { |
1274 | log_error("Failed to add match for NameLost: %s", strerror(-r)); | |
1275 | goto finish; | |
1276 | } | |
0721804f | 1277 | |
a7639e37 LP |
1278 | free(match); |
1279 | match = strjoin("type='signal'," | |
1280 | "sender='org.freedesktop.DBus'," | |
1281 | "path='/org/freedesktop/DBus'," | |
1282 | "interface='org.freedesktop.DBus'," | |
1283 | "member='NameOwnerChanged'," | |
1284 | "arg2='", | |
1285 | unique, | |
1286 | "'", | |
1287 | NULL); | |
1288 | if (!match) { | |
1289 | log_oom(); | |
1290 | goto finish; | |
1291 | } | |
0721804f | 1292 | |
19befb2d | 1293 | r = sd_bus_add_match(a, NULL, match, NULL, NULL); |
a7639e37 LP |
1294 | if (r < 0) { |
1295 | log_error("Failed to add match for NameAcquired: %s", strerror(-r)); | |
1296 | goto finish; | |
0721804f LP |
1297 | } |
1298 | } | |
1299 | ||
d51539b1 LP |
1300 | for (;;) { |
1301 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
f72a3e5b KS |
1302 | int events_a, events_b, fd; |
1303 | uint64_t timeout_a, timeout_b, t; | |
d51539b1 | 1304 | struct timespec _ts, *ts; |
b2bb3469 | 1305 | struct pollfd *pollfd; |
f72a3e5b KS |
1306 | int k; |
1307 | ||
a7639e37 LP |
1308 | if (got_hello) { |
1309 | r = sd_bus_process(a, &m); | |
1310 | if (r < 0) { | |
1311 | /* treat 'connection reset by peer' as clean exit condition */ | |
1312 | if (r == -ECONNRESET) | |
1313 | r = 0; | |
1314 | else | |
1315 | log_error("Failed to process bus a: %s", strerror(-r)); | |
a8f11321 | 1316 | |
0358b3f9 LP |
1317 | goto finish; |
1318 | } | |
1319 | ||
a7639e37 LP |
1320 | if (m) { |
1321 | /* We officially got EOF, let's quit */ | |
1322 | if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) { | |
1323 | r = 0; | |
1324 | goto finish; | |
1325 | } | |
1326 | ||
1327 | k = synthesize_name_acquired(a, b, m); | |
1328 | if (k < 0) { | |
1329 | r = k; | |
1330 | log_error("Failed to synthesize message: %s", strerror(-r)); | |
1331 | goto finish; | |
1332 | } | |
1333 | ||
7b217f41 LP |
1334 | patch_sender(a, m); |
1335 | ||
a7639e37 LP |
1336 | k = sd_bus_send(b, m, NULL); |
1337 | if (k < 0) { | |
441d56a1 LP |
1338 | if (k == -ECONNRESET) |
1339 | r = 0; | |
1340 | else { | |
1341 | r = k; | |
1342 | log_error("Failed to send message: %s", strerror(-r)); | |
1343 | } | |
1344 | ||
a7639e37 LP |
1345 | goto finish; |
1346 | } | |
d51539b1 | 1347 | } |
a8f11321 | 1348 | |
a7639e37 LP |
1349 | if (r > 0) |
1350 | continue; | |
1351 | } | |
f72a3e5b KS |
1352 | |
1353 | r = sd_bus_process(b, &m); | |
1354 | if (r < 0) { | |
1355 | /* treat 'connection reset by peer' as clean exit condition */ | |
1356 | if (r == -ECONNRESET) | |
1357 | r = 0; | |
1358 | else | |
1359 | log_error("Failed to process bus b: %s", strerror(-r)); | |
1360 | ||
d51539b1 LP |
1361 | goto finish; |
1362 | } | |
a8f11321 | 1363 | |
f72a3e5b KS |
1364 | if (m) { |
1365 | /* We officially got EOF, let's quit */ | |
1366 | if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) { | |
1367 | r = 0; | |
9818fa6d ZJS |
1368 | goto finish; |
1369 | } | |
a8f11321 | 1370 | |
a7639e37 | 1371 | k = process_hello(a, b, m, &got_hello); |
f72a3e5b KS |
1372 | if (k < 0) { |
1373 | r = k; | |
920e2957 | 1374 | log_error("Failed to process HELLO: %s", strerror(-r)); |
9818fa6d ZJS |
1375 | goto finish; |
1376 | } | |
a7639e37 LP |
1377 | |
1378 | if (k > 0) | |
1379 | r = k; | |
1380 | else { | |
c2595875 LP |
1381 | k = process_policy(a, b, m); |
1382 | if (k < 0) { | |
1383 | r = k; | |
920e2957 | 1384 | log_error("Failed to process policy: %s", strerror(-r)); |
c2595875 LP |
1385 | goto finish; |
1386 | } | |
1387 | ||
2a0abe5b | 1388 | k = process_driver(a, b, m); |
a7639e37 | 1389 | if (k < 0) { |
2a0abe5b LP |
1390 | r = k; |
1391 | log_error("Failed to process driver calls: %s", strerror(-r)); | |
a7639e37 LP |
1392 | goto finish; |
1393 | } | |
2a0abe5b LP |
1394 | |
1395 | if (k > 0) | |
1396 | r = k; | |
1397 | else { | |
1398 | k = sd_bus_send(a, m, NULL); | |
1399 | if (k < 0) { | |
1400 | if (r == -ECONNRESET) | |
1401 | r = 0; | |
1402 | else { | |
1403 | r = k; | |
1404 | log_error("Failed to send message: %s", strerror(-r)); | |
1405 | } | |
1406 | ||
1407 | goto finish; | |
1408 | } | |
1409 | } | |
a7639e37 | 1410 | } |
d51539b1 | 1411 | } |
a8f11321 | 1412 | |
f72a3e5b KS |
1413 | if (r > 0) |
1414 | continue; | |
1415 | ||
1416 | fd = sd_bus_get_fd(a); | |
1417 | if (fd < 0) { | |
1418 | log_error("Failed to get fd: %s", strerror(-r)); | |
1419 | goto finish; | |
1420 | } | |
1421 | ||
1422 | events_a = sd_bus_get_events(a); | |
1423 | if (events_a < 0) { | |
1424 | log_error("Failed to get events mask: %s", strerror(-r)); | |
1425 | goto finish; | |
1426 | } | |
1427 | ||
1428 | r = sd_bus_get_timeout(a, &timeout_a); | |
1429 | if (r < 0) { | |
1430 | log_error("Failed to get timeout: %s", strerror(-r)); | |
1431 | goto finish; | |
1432 | } | |
1433 | ||
1434 | events_b = sd_bus_get_events(b); | |
1435 | if (events_b < 0) { | |
1436 | log_error("Failed to get events mask: %s", strerror(-r)); | |
1437 | goto finish; | |
1438 | } | |
1439 | ||
1440 | r = sd_bus_get_timeout(b, &timeout_b); | |
1441 | if (r < 0) { | |
1442 | log_error("Failed to get timeout: %s", strerror(-r)); | |
1443 | goto finish; | |
1444 | } | |
1445 | ||
1446 | t = timeout_a; | |
1447 | if (t == (uint64_t) -1 || (timeout_b != (uint64_t) -1 && timeout_b < timeout_a)) | |
1448 | t = timeout_b; | |
a8f11321 | 1449 | |
d51539b1 LP |
1450 | if (t == (uint64_t) -1) |
1451 | ts = NULL; | |
1452 | else { | |
1453 | usec_t nw; | |
a8f11321 | 1454 | |
d51539b1 LP |
1455 | nw = now(CLOCK_MONOTONIC); |
1456 | if (t > nw) | |
1457 | t -= nw; | |
1458 | else | |
1459 | t = 0; | |
a8f11321 | 1460 | |
d51539b1 | 1461 | ts = timespec_store(&_ts, t); |
a8f11321 LP |
1462 | } |
1463 | ||
b2bb3469 | 1464 | pollfd = (struct pollfd[3]) { |
f72a3e5b KS |
1465 | {.fd = fd, .events = events_a, }, |
1466 | {.fd = in_fd, .events = events_b & POLLIN, }, | |
1467 | {.fd = out_fd, .events = events_b & POLLOUT, } | |
b2bb3469 | 1468 | }; |
d51539b1 | 1469 | |
b2bb3469 | 1470 | r = ppoll(pollfd, 3, ts, NULL); |
d51539b1 LP |
1471 | if (r < 0) { |
1472 | log_error("ppoll() failed: %m"); | |
1473 | goto finish; | |
1474 | } | |
1475 | } | |
a8f11321 | 1476 | |
a8f11321 | 1477 | finish: |
0358b3f9 LP |
1478 | sd_bus_flush(a); |
1479 | sd_bus_flush(b); | |
7f0d207d LP |
1480 | sd_bus_close(a); |
1481 | sd_bus_close(b); | |
0358b3f9 | 1482 | |
bcf3295d | 1483 | policy_free(&policy); |
2e2b3608 | 1484 | strv_free(arg_configuration); |
7f0d207d | 1485 | free(arg_address); |
bcf3295d | 1486 | |
d51539b1 | 1487 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
a8f11321 | 1488 | } |