1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
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 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <sys/types.h>
27 #include <sys/epoll.h>
29 #include <arpa/inet.h>
34 #include "load-dropin.h"
35 #include "load-fragment.h"
37 #include "unit-name.h"
38 #include "dbus-socket.h"
40 static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = {
41 [SOCKET_DEAD] = UNIT_INACTIVE,
42 [SOCKET_START_PRE] = UNIT_ACTIVATING,
43 [SOCKET_START_POST] = UNIT_ACTIVATING,
44 [SOCKET_LISTENING] = UNIT_ACTIVE,
45 [SOCKET_RUNNING] = UNIT_ACTIVE,
46 [SOCKET_STOP_PRE] = UNIT_DEACTIVATING,
47 [SOCKET_STOP_PRE_SIGTERM] = UNIT_DEACTIVATING,
48 [SOCKET_STOP_PRE_SIGKILL] = UNIT_DEACTIVATING,
49 [SOCKET_STOP_POST] = UNIT_DEACTIVATING,
50 [SOCKET_FINAL_SIGTERM] = UNIT_DEACTIVATING,
51 [SOCKET_FINAL_SIGKILL] = UNIT_DEACTIVATING,
52 [SOCKET_MAINTAINANCE] = UNIT_INACTIVE,
55 static void socket_init(Unit *u) {
56 Socket *s = SOCKET(u);
59 assert(u->meta.load_state == UNIT_STUB);
61 s->timer_watch.type = WATCH_INVALID;
62 s->backlog = SOMAXCONN;
63 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
64 s->directory_mode = 0755;
65 s->socket_mode = 0666;
67 exec_context_init(&s->exec_context);
69 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
72 static void socket_unwatch_control_pid(Socket *s) {
75 if (s->control_pid <= 0)
78 unit_unwatch_pid(UNIT(s), s->control_pid);
82 static void socket_done(Unit *u) {
83 Socket *s = SOCKET(u);
88 while ((p = s->ports)) {
89 LIST_REMOVE(SocketPort, port, s->ports, p);
92 unit_unwatch_fd(UNIT(s), &p->fd_watch);
93 close_nointr_nofail(p->fd);
100 exec_context_done(&s->exec_context);
101 exec_command_free_array(s->exec_command, _SOCKET_EXEC_COMMAND_MAX);
102 s->control_command = NULL;
104 socket_unwatch_control_pid(s);
108 free(s->bind_to_device);
109 s->bind_to_device = NULL;
111 unit_unwatch_timer(u, &s->timer_watch);
114 static bool have_non_accept_socket(Socket *s) {
122 LIST_FOREACH(port, p, s->ports) {
124 if (p->type != SOCKET_SOCKET)
127 if (!socket_address_can_accept(&p->address))
134 static int socket_verify(Socket *s) {
137 if (UNIT(s)->meta.load_state != UNIT_LOADED)
141 log_error("%s lacks Listen setting. Refusing.", UNIT(s)->meta.id);
148 static bool socket_needs_mount(Socket *s, const char *prefix) {
153 LIST_FOREACH(port, p, s->ports) {
155 if (p->type == SOCKET_SOCKET) {
156 if (socket_address_needs_mount(&p->address, prefix))
159 assert(p->type == SOCKET_FIFO);
160 if (path_startswith(p->path, prefix))
168 int socket_add_one_mount_link(Socket *s, Mount *m) {
174 if (s->meta.load_state != UNIT_LOADED ||
175 m->meta.load_state != UNIT_LOADED)
178 if (!socket_needs_mount(s, m->where))
181 if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(s), true)) < 0)
184 if ((r = unit_add_dependency(UNIT(s), UNIT_REQUIRES, UNIT(m), true)) < 0)
190 static int socket_add_mount_links(Socket *s) {
196 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_MOUNT])
197 if ((r = socket_add_one_mount_link(s, (Mount*) other)) < 0)
203 static int socket_add_device_link(Socket *s) {
209 if (!s->bind_to_device)
212 if (asprintf(&t, "/sys/subsystem/net/devices/%s", s->bind_to_device) < 0)
215 r = unit_add_node_link(UNIT(s), t, false);
221 static int socket_load(Unit *u) {
222 Socket *s = SOCKET(u);
226 assert(u->meta.load_state == UNIT_STUB);
228 if ((r = unit_load_fragment_and_dropin(u)) < 0)
231 /* This is a new unit? Then let's add in some extras */
232 if (u->meta.load_state == UNIT_LOADED) {
234 if (have_non_accept_socket(s)) {
235 if ((r = unit_load_related_unit(u, ".service", (Unit**) &s->service)))
238 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service), true)) < 0)
242 if ((r = socket_add_mount_links(s)) < 0)
245 if ((r = socket_add_device_link(s)) < 0)
248 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
251 if ((r = unit_add_default_cgroup(u)) < 0)
255 return socket_verify(s);
258 static const char* listen_lookup(int type) {
260 if (type == SOCK_STREAM)
261 return "ListenStream";
262 else if (type == SOCK_DGRAM)
263 return "ListenDatagram";
264 else if (type == SOCK_SEQPACKET)
265 return "ListenSequentialPacket";
267 assert_not_reached("Unknown socket type");
271 static void socket_dump(Unit *u, FILE *f, const char *prefix) {
274 Socket *s = SOCKET(u);
282 p2 = strappend(prefix, "\t");
283 prefix2 = p2 ? p2 : prefix;
286 "%sSocket State: %s\n"
287 "%sBindIPv6Only: %s\n"
290 "%sSocketMode: %04o\n"
291 "%sDirectoryMode: %04o\n",
292 prefix, socket_state_to_string(s->state),
293 prefix, yes_no(s->bind_ipv6_only),
295 prefix, kill_mode_to_string(s->kill_mode),
296 prefix, s->socket_mode,
297 prefix, s->directory_mode);
299 if (s->control_pid > 0)
301 "%sControl PID: %llu\n",
302 prefix, (unsigned long long) s->control_pid);
304 if (s->bind_to_device)
306 "%sBindToDevice: %s\n",
307 prefix, s->bind_to_device);
312 prefix, s->n_accepted);
314 LIST_FOREACH(port, p, s->ports) {
316 if (p->type == SOCKET_SOCKET) {
321 if ((r = socket_address_print(&p->address, &k)) < 0)
326 fprintf(f, "%s%s: %s\n", prefix, listen_lookup(p->address.type), k);
329 fprintf(f, "%sListenFIFO: %s\n", prefix, p->path);
332 exec_context_dump(&s->exec_context, f, prefix);
334 for (c = 0; c < _SOCKET_EXEC_COMMAND_MAX; c++) {
335 if (!s->exec_command[c])
338 fprintf(f, "%s-> %s:\n",
339 prefix, socket_exec_command_to_string(c));
341 exec_command_dump_list(s->exec_command[c], f, prefix2);
347 static int instance_from_socket(int fd, unsigned nr, char **instance) {
352 struct sockaddr_un un;
353 struct sockaddr_in in;
354 struct sockaddr_in6 in6;
355 struct sockaddr_storage storage;
362 if (getsockname(fd, &local.sa, &l) < 0)
366 if (getpeername(fd, &remote.sa, &l) < 0)
369 switch (local.sa.sa_family) {
373 a = ntohl(local.in.sin_addr.s_addr),
374 b = ntohl(remote.in.sin_addr.s_addr);
377 "%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
379 a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
380 ntohs(local.in.sin_port),
381 b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
382 ntohs(remote.in.sin_port)) < 0)
389 char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
394 inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
395 ntohs(local.in6.sin6_port),
396 inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
397 ntohs(remote.in6.sin6_port)) < 0)
407 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0)
413 (unsigned long long) ucred.pid,
414 (unsigned long long) ucred.uid) < 0)
421 assert_not_reached("Unhandled socket type.");
428 static void socket_close_fds(Socket *s) {
433 LIST_FOREACH(port, p, s->ports) {
437 unit_unwatch_fd(UNIT(s), &p->fd_watch);
438 close_nointr_nofail(p->fd);
440 /* One little note: we should never delete any sockets
441 * in the file system here! After all some other
442 * process we spawned might still have a reference of
443 * this fd and wants to continue to use it. Therefore
444 * we delete sockets in the file system before we
445 * create a new one, not after we stopped using
452 static int socket_open_fds(Socket *s) {
458 LIST_FOREACH(port, p, s->ports) {
463 if (p->type == SOCKET_SOCKET) {
465 if ((r = socket_address_listen(
477 assert(p->type == SOCKET_FIFO);
479 mkdir_parents(p->path, s->directory_mode);
481 if (mkfifo(p->path, s->socket_mode) < 0 && errno != EEXIST) {
486 if ((p->fd = open(p->path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW)) < 0) {
491 if (fstat(p->fd, &st) < 0) {
496 /* FIXME verify user, access mode */
498 if (!S_ISFIFO(st.st_mode)) {
512 static void socket_unwatch_fds(Socket *s) {
517 LIST_FOREACH(port, p, s->ports) {
521 unit_unwatch_fd(UNIT(s), &p->fd_watch);
525 static int socket_watch_fds(Socket *s) {
531 LIST_FOREACH(port, p, s->ports) {
535 p->fd_watch.socket_accept =
537 p->type == SOCKET_SOCKET &&
538 socket_address_can_accept(&p->address);
540 if ((r = unit_watch_fd(UNIT(s), p->fd, EPOLLIN, &p->fd_watch)) < 0)
547 socket_unwatch_fds(s);
551 static void socket_set_state(Socket *s, SocketState state) {
552 SocketState old_state;
555 old_state = s->state;
558 if (state != SOCKET_START_PRE &&
559 state != SOCKET_START_POST &&
560 state != SOCKET_STOP_PRE &&
561 state != SOCKET_STOP_PRE_SIGTERM &&
562 state != SOCKET_STOP_PRE_SIGKILL &&
563 state != SOCKET_STOP_POST &&
564 state != SOCKET_FINAL_SIGTERM &&
565 state != SOCKET_FINAL_SIGKILL) {
566 unit_unwatch_timer(UNIT(s), &s->timer_watch);
567 socket_unwatch_control_pid(s);
568 s->control_command = NULL;
569 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
572 if (state != SOCKET_LISTENING)
573 socket_unwatch_fds(s);
575 if (state != SOCKET_START_POST &&
576 state != SOCKET_LISTENING &&
577 state != SOCKET_RUNNING &&
578 state != SOCKET_STOP_PRE &&
579 state != SOCKET_STOP_PRE_SIGTERM &&
580 state != SOCKET_STOP_PRE_SIGKILL)
583 if (state != old_state)
584 log_debug("%s changed %s -> %s",
586 socket_state_to_string(old_state),
587 socket_state_to_string(state));
589 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
592 static int socket_coldplug(Unit *u) {
593 Socket *s = SOCKET(u);
597 assert(s->state == SOCKET_DEAD);
599 if (s->deserialized_state != s->state) {
601 if (s->deserialized_state == SOCKET_START_PRE ||
602 s->deserialized_state == SOCKET_START_POST ||
603 s->deserialized_state == SOCKET_STOP_PRE ||
604 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
605 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL ||
606 s->deserialized_state == SOCKET_STOP_POST ||
607 s->deserialized_state == SOCKET_FINAL_SIGTERM ||
608 s->deserialized_state == SOCKET_FINAL_SIGKILL) {
610 if (s->control_pid <= 0)
613 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
616 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
620 if (s->deserialized_state == SOCKET_START_POST ||
621 s->deserialized_state == SOCKET_LISTENING ||
622 s->deserialized_state == SOCKET_RUNNING ||
623 s->deserialized_state == SOCKET_STOP_PRE ||
624 s->deserialized_state == SOCKET_STOP_PRE_SIGTERM ||
625 s->deserialized_state == SOCKET_STOP_PRE_SIGKILL)
626 if ((r = socket_open_fds(s)) < 0)
629 if (s->deserialized_state == SOCKET_LISTENING)
630 if ((r = socket_watch_fds(s)) < 0)
633 socket_set_state(s, s->deserialized_state);
639 static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) {
648 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
651 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
660 s->meta.manager->environment,
663 UNIT(s)->meta.manager->confirm_spawn,
664 UNIT(s)->meta.cgroup_bondings,
671 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
672 /* FIXME: we need to do something here */
680 unit_unwatch_timer(UNIT(s), &s->timer_watch);
685 static void socket_enter_dead(Socket *s, bool success) {
691 socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
694 static void socket_enter_signal(Socket *s, SocketState state, bool success);
696 static void socket_enter_stop_post(Socket *s, bool success) {
703 socket_unwatch_control_pid(s);
705 s->control_command_id = SOCKET_EXEC_STOP_POST;
707 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST])) {
708 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
711 socket_set_state(s, SOCKET_STOP_POST);
713 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, true);
718 log_warning("%s failed to run stop-post executable: %s", s->meta.id, strerror(-r));
719 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
722 static void socket_enter_signal(Socket *s, SocketState state, bool success) {
731 if (s->kill_mode != KILL_NONE) {
732 int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
734 if (s->kill_mode == KILL_CONTROL_GROUP) {
736 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
737 if (r != -EAGAIN && r != -ESRCH)
743 if (!sent && s->control_pid > 0)
744 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
750 if (sent && s->control_pid > 0) {
751 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
754 socket_set_state(s, state);
755 } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
756 socket_enter_stop_post(s, true);
758 socket_enter_dead(s, true);
763 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
765 if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
766 socket_enter_stop_post(s, false);
768 socket_enter_dead(s, false);
771 static void socket_enter_stop_pre(Socket *s, bool success) {
778 socket_unwatch_control_pid(s);
780 s->control_command_id = SOCKET_EXEC_STOP_PRE;
782 if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
783 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
786 socket_set_state(s, SOCKET_STOP_PRE);
788 socket_enter_stop_post(s, true);
793 log_warning("%s failed to run stop-pre executable: %s", s->meta.id, strerror(-r));
794 socket_enter_stop_post(s, false);
797 static void socket_enter_listening(Socket *s) {
801 if ((r = socket_watch_fds(s)) < 0) {
802 log_warning("%s failed to watch sockets: %s", s->meta.id, strerror(-r));
806 socket_set_state(s, SOCKET_LISTENING);
810 socket_enter_stop_pre(s, false);
813 static void socket_enter_start_post(Socket *s) {
817 if ((r = socket_open_fds(s)) < 0) {
818 log_warning("%s failed to listen on sockets: %s", s->meta.id, strerror(-r));
822 socket_unwatch_control_pid(s);
824 s->control_command_id = SOCKET_EXEC_START_POST;
826 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
827 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
828 log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
832 socket_set_state(s, SOCKET_START_POST);
834 socket_enter_listening(s);
839 socket_enter_stop_pre(s, false);
842 static void socket_enter_start_pre(Socket *s) {
846 socket_unwatch_control_pid(s);
848 s->control_command_id = SOCKET_EXEC_START_PRE;
850 if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
851 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
854 socket_set_state(s, SOCKET_START_PRE);
856 socket_enter_start_post(s);
861 log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
862 socket_enter_dead(s, false);
865 static void socket_enter_running(Socket *s, int cfd) {
871 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
874 socket_set_state(s, SOCKET_RUNNING);
877 char *prefix, *instance, *name;
879 if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)))
882 if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
888 name = unit_name_build(prefix, instance, ".service");
895 r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
901 if ((r = service_set_socket_fd(SERVICE(u), cfd) < 0))
906 if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
913 log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
914 socket_enter_stop_pre(s, false);
917 close_nointr_nofail(cfd);
920 static void socket_run_next(Socket *s, bool success) {
924 assert(s->control_command);
925 assert(s->control_command->command_next);
930 socket_unwatch_control_pid(s);
932 s->control_command = s->control_command->command_next;
934 if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
940 log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
942 if (s->state == SOCKET_START_POST)
943 socket_enter_stop_pre(s, false);
944 else if (s->state == SOCKET_STOP_POST)
945 socket_enter_dead(s, false);
947 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
950 static int socket_start(Unit *u) {
951 Socket *s = SOCKET(u);
955 /* We cannot fulfill this request right now, try again later
957 if (s->state == SOCKET_STOP_PRE ||
958 s->state == SOCKET_STOP_PRE_SIGKILL ||
959 s->state == SOCKET_STOP_PRE_SIGTERM ||
960 s->state == SOCKET_STOP_POST ||
961 s->state == SOCKET_FINAL_SIGTERM ||
962 s->state == SOCKET_FINAL_SIGKILL)
965 if (s->state == SOCKET_START_PRE ||
966 s->state == SOCKET_START_POST)
969 /* Cannot run this without the service being around */
971 if (s->service->meta.load_state != UNIT_LOADED)
974 /* If the service is alredy actvie we cannot start the
976 if (s->service->state != SERVICE_DEAD &&
977 s->service->state != SERVICE_MAINTAINANCE &&
978 s->service->state != SERVICE_AUTO_RESTART)
982 assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
985 socket_enter_start_pre(s);
989 static int socket_stop(Unit *u) {
990 Socket *s = SOCKET(u);
994 /* We cannot fulfill this request right now, try again later
996 if (s->state == SOCKET_START_PRE ||
997 s->state == SOCKET_START_POST)
1001 if (s->state == SOCKET_STOP_PRE ||
1002 s->state == SOCKET_STOP_PRE_SIGTERM ||
1003 s->state == SOCKET_STOP_PRE_SIGKILL ||
1004 s->state == SOCKET_STOP_POST ||
1005 s->state == SOCKET_FINAL_SIGTERM ||
1006 s->state == SOCKET_FINAL_SIGTERM)
1009 assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
1011 socket_enter_stop_pre(s, true);
1015 static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
1016 Socket *s = SOCKET(u);
1024 unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
1025 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1026 unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
1028 if (s->control_pid > 0)
1029 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) s->control_pid);
1031 if (s->control_command_id >= 0)
1032 unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
1034 LIST_FOREACH(port, p, s->ports) {
1040 if ((copy = fdset_put_dup(fds, p->fd)) < 0)
1043 if (p->type == SOCKET_SOCKET) {
1046 if ((r = socket_address_print(&p->address, &t)) < 0)
1049 unit_serialize_item_format(u, f, "socket", "%i %s", copy, t);
1052 assert(p->type == SOCKET_FIFO);
1053 unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
1060 static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1061 Socket *s = SOCKET(u);
1069 if (streq(key, "state")) {
1072 if ((state = socket_state_from_string(value)) < 0)
1073 log_debug("Failed to parse state value %s", value);
1075 s->deserialized_state = state;
1076 } else if (streq(key, "failure")) {
1079 if ((b = parse_boolean(value)) < 0)
1080 log_debug("Failed to parse failure value %s", value);
1082 s->failure = b || s->failure;
1084 } else if (streq(key, "n-accepted")) {
1087 if ((r = safe_atou(value, &k)) < 0)
1088 log_debug("Failed to parse n-accepted value %s", value);
1091 } else if (streq(key, "control-pid")) {
1094 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1095 log_debug("Failed to parse control-pid value %s", value);
1097 s->control_pid = (pid_t) pid;
1098 } else if (streq(key, "control-command")) {
1099 SocketExecCommand id;
1101 if ((id = socket_exec_command_from_string(value)) < 0)
1102 log_debug("Failed to parse exec-command value %s", value);
1104 s->control_command_id = id;
1105 s->control_command = s->exec_command[id];
1107 } else if (streq(key, "fifo")) {
1111 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1112 log_debug("Failed to parse fifo value %s", value);
1115 LIST_FOREACH(port, p, s->ports)
1116 if (streq(p->path, value+skip))
1121 close_nointr_nofail(p->fd);
1122 p->fd = fdset_remove(fds, fd);
1126 } else if (streq(key, "socket")) {
1130 if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
1131 log_debug("Failed to parse socket value %s", value);
1134 LIST_FOREACH(port, p, s->ports)
1135 if (socket_address_is(&p->address, value+skip))
1140 close_nointr_nofail(p->fd);
1141 p->fd = fdset_remove(fds, fd);
1146 log_debug("Unknown serialization key '%s'", key);
1151 static UnitActiveState socket_active_state(Unit *u) {
1154 return state_translation_table[SOCKET(u)->state];
1157 static const char *socket_sub_state_to_string(Unit *u) {
1160 return socket_state_to_string(SOCKET(u)->state);
1163 static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
1164 Socket *s = SOCKET(u);
1170 log_debug("Incoming traffic on %s", u->meta.id);
1172 if (events != EPOLLIN) {
1173 log_error("Got invalid poll event on socket.");
1177 if (w->socket_accept) {
1180 if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
1185 log_error("Failed to accept socket: %m");
1193 socket_enter_running(s, cfd);
1197 socket_enter_stop_pre(s, false);
1200 static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1201 Socket *s = SOCKET(u);
1207 success = code == CLD_EXITED && status == 0;
1208 s->failure = s->failure || !success;
1210 assert(s->control_pid == pid);
1213 if (s->control_command)
1214 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1216 log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1218 if (s->control_command && s->control_command->command_next && success) {
1219 log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
1220 socket_run_next(s, success);
1222 s->control_command = NULL;
1223 s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
1225 /* No further commands for this step, so let's figure
1226 * out what to do next */
1228 log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
1232 case SOCKET_START_PRE:
1234 socket_enter_start_post(s);
1236 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1239 case SOCKET_START_POST:
1241 socket_enter_listening(s);
1243 socket_enter_stop_pre(s, false);
1246 case SOCKET_STOP_PRE:
1247 case SOCKET_STOP_PRE_SIGTERM:
1248 case SOCKET_STOP_PRE_SIGKILL:
1249 socket_enter_stop_post(s, success);
1252 case SOCKET_STOP_POST:
1253 case SOCKET_FINAL_SIGTERM:
1254 case SOCKET_FINAL_SIGKILL:
1255 socket_enter_dead(s, success);
1259 assert_not_reached("Uh, control process died at wrong time.");
1264 static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
1265 Socket *s = SOCKET(u);
1268 assert(elapsed == 1);
1269 assert(w == &s->timer_watch);
1273 case SOCKET_START_PRE:
1274 log_warning("%s starting timed out. Terminating.", u->meta.id);
1275 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1277 case SOCKET_START_POST:
1278 log_warning("%s starting timed out. Stopping.", u->meta.id);
1279 socket_enter_stop_pre(s, false);
1282 case SOCKET_STOP_PRE:
1283 log_warning("%s stopping timed out. Terminating.", u->meta.id);
1284 socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
1287 case SOCKET_STOP_PRE_SIGTERM:
1288 log_warning("%s stopping timed out. Killing.", u->meta.id);
1289 socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
1292 case SOCKET_STOP_PRE_SIGKILL:
1293 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
1294 socket_enter_stop_post(s, false);
1297 case SOCKET_STOP_POST:
1298 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
1299 socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
1302 case SOCKET_FINAL_SIGTERM:
1303 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
1304 socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
1307 case SOCKET_FINAL_SIGKILL:
1308 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
1309 socket_enter_dead(s, false);
1313 assert_not_reached("Timeout at wrong time.");
1317 int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
1326 /* Called from the service code for requesting our fds */
1329 LIST_FOREACH(port, p, s->ports)
1333 if (!(rfds = new(int, rn_fds)) < 0)
1337 LIST_FOREACH(port, p, s->ports)
1341 assert(k == rn_fds);
1349 void socket_notify_service_dead(Socket *s) {
1352 /* The service is dead. Dang. */
1354 if (s->state == SOCKET_RUNNING) {
1355 log_debug("%s got notified about service death.", s->meta.id);
1356 socket_enter_listening(s);
1360 static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
1361 [SOCKET_DEAD] = "dead",
1362 [SOCKET_START_PRE] = "start-pre",
1363 [SOCKET_START_POST] = "start-post",
1364 [SOCKET_LISTENING] = "listening",
1365 [SOCKET_RUNNING] = "running",
1366 [SOCKET_STOP_PRE] = "stop-pre",
1367 [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
1368 [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
1369 [SOCKET_STOP_POST] = "stop-post",
1370 [SOCKET_FINAL_SIGTERM] = "final-sigterm",
1371 [SOCKET_FINAL_SIGKILL] = "final-sigkill",
1372 [SOCKET_MAINTAINANCE] = "maintainance"
1375 DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
1377 static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
1378 [SOCKET_EXEC_START_PRE] = "StartPre",
1379 [SOCKET_EXEC_START_POST] = "StartPost",
1380 [SOCKET_EXEC_STOP_PRE] = "StopPre",
1381 [SOCKET_EXEC_STOP_POST] = "StopPost"
1384 DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
1386 const UnitVTable socket_vtable = {
1387 .suffix = ".socket",
1389 .init = socket_init,
1390 .done = socket_done,
1391 .load = socket_load,
1393 .coldplug = socket_coldplug,
1395 .dump = socket_dump,
1397 .start = socket_start,
1398 .stop = socket_stop,
1400 .serialize = socket_serialize,
1401 .deserialize_item = socket_deserialize_item,
1403 .active_state = socket_active_state,
1404 .sub_state_to_string = socket_sub_state_to_string,
1406 .fd_event = socket_fd_event,
1407 .sigchld_event = socket_sigchld_event,
1408 .timer_event = socket_timer_event,
1410 .bus_message_handler = bus_socket_message_handler