+++ /dev/null
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/mman.h>
-
-#include "alloc-util.h"
-#include "bus-internal.h"
-#include "bus-kernel.h"
-#include "bus-policy.h"
-#include "bus-util.h"
-#include "busname.h"
-#include "dbus-busname.h"
-#include "fd-util.h"
-#include "format-util.h"
-#include "kdbus.h"
-#include "parse-util.h"
-#include "process-util.h"
-#include "service.h"
-#include "signal-util.h"
-#include "special.h"
-#include "string-table.h"
-#include "string-util.h"
-
-static const UnitActiveState state_translation_table[_BUSNAME_STATE_MAX] = {
- [BUSNAME_DEAD] = UNIT_INACTIVE,
- [BUSNAME_MAKING] = UNIT_ACTIVATING,
- [BUSNAME_REGISTERED] = UNIT_ACTIVE,
- [BUSNAME_LISTENING] = UNIT_ACTIVE,
- [BUSNAME_RUNNING] = UNIT_ACTIVE,
- [BUSNAME_SIGTERM] = UNIT_DEACTIVATING,
- [BUSNAME_SIGKILL] = UNIT_DEACTIVATING,
- [BUSNAME_FAILED] = UNIT_FAILED
-};
-
-static int busname_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
-static int busname_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
-
-static void busname_init(Unit *u) {
- BusName *n = BUSNAME(u);
-
- assert(u);
- assert(u->load_state == UNIT_STUB);
-
- n->starter_fd = -1;
- n->accept_fd = true;
- n->activating = true;
-
- n->timeout_usec = u->manager->default_timeout_start_usec;
-}
-
-static void busname_unwatch_control_pid(BusName *n) {
- assert(n);
-
- if (n->control_pid <= 0)
- return;
-
- unit_unwatch_pid(UNIT(n), n->control_pid);
- n->control_pid = 0;
-}
-
-static void busname_free_policy(BusName *n) {
- BusNamePolicy *p;
-
- assert(n);
-
- while ((p = n->policy)) {
- LIST_REMOVE(policy, n->policy, p);
-
- free(p->name);
- free(p);
- }
-}
-
-static void busname_close_fd(BusName *n) {
- assert(n);
-
- n->starter_event_source = sd_event_source_unref(n->starter_event_source);
- n->starter_fd = safe_close(n->starter_fd);
-}
-
-static void busname_done(Unit *u) {
- BusName *n = BUSNAME(u);
-
- assert(n);
-
- n->name = mfree(n->name);
-
- busname_free_policy(n);
- busname_unwatch_control_pid(n);
- busname_close_fd(n);
-
- unit_ref_unset(&n->service);
-
- n->timer_event_source = sd_event_source_unref(n->timer_event_source);
-}
-
-static int busname_arm_timer(BusName *n, usec_t usec) {
- int r;
-
- assert(n);
-
- if (n->timer_event_source) {
- r = sd_event_source_set_time(n->timer_event_source, usec);
- if (r < 0)
- return r;
-
- return sd_event_source_set_enabled(n->timer_event_source, SD_EVENT_ONESHOT);
- }
-
- if (usec == USEC_INFINITY)
- return 0;
-
- r = sd_event_add_time(
- UNIT(n)->manager->event,
- &n->timer_event_source,
- CLOCK_MONOTONIC,
- usec, 0,
- busname_dispatch_timer, n);
- if (r < 0)
- return r;
-
- (void) sd_event_source_set_description(n->timer_event_source, "busname-timer");
-
- return 0;
-}
-
-static int busname_add_default_default_dependencies(BusName *n) {
- int r;
-
- assert(n);
-
- r = unit_add_dependency_by_name(UNIT(n), UNIT_BEFORE, SPECIAL_BUSNAMES_TARGET, NULL, true);
- if (r < 0)
- return r;
-
- if (MANAGER_IS_SYSTEM(UNIT(n)->manager)) {
- r = unit_add_two_dependencies_by_name(UNIT(n), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
- if (r < 0)
- return r;
- }
-
- return unit_add_two_dependencies_by_name(UNIT(n), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
-}
-
-static int busname_add_extras(BusName *n) {
- Unit *u = UNIT(n);
- int r;
-
- assert(n);
-
- if (!n->name) {
- r = unit_name_to_prefix(u->id, &n->name);
- if (r < 0)
- return r;
- }
-
- if (!u->description) {
- r = unit_set_description(u, n->name);
- if (r < 0)
- return r;
- }
-
- if (n->activating) {
- if (!UNIT_DEREF(n->service)) {
- Unit *x;
-
- r = unit_load_related_unit(u, ".service", &x);
- if (r < 0)
- return r;
-
- unit_ref_set(&n->service, x);
- }
-
- r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(n->service), true);
- if (r < 0)
- return r;
- }
-
- if (u->default_dependencies) {
- r = busname_add_default_default_dependencies(n);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-static int busname_verify(BusName *n) {
- char *e;
-
- assert(n);
-
- if (UNIT(n)->load_state != UNIT_LOADED)
- return 0;
-
- if (!service_name_is_valid(n->name)) {
- log_unit_error(UNIT(n), "Name= setting is not a valid service name Refusing.");
- return -EINVAL;
- }
-
- e = strjoina(n->name, ".busname");
- if (!unit_has_name(UNIT(n), e)) {
- log_unit_error(UNIT(n), "Name= setting doesn't match unit name. Refusing.");
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int busname_load(Unit *u) {
- BusName *n = BUSNAME(u);
- int r;
-
- assert(u);
- assert(u->load_state == UNIT_STUB);
-
- r = unit_load_fragment_and_dropin(u);
- if (r < 0)
- return r;
-
- if (u->load_state == UNIT_LOADED) {
- /* This is a new unit? Then let's add in some extras */
- r = busname_add_extras(n);
- if (r < 0)
- return r;
- }
-
- return busname_verify(n);
-}
-
-static void busname_dump(Unit *u, FILE *f, const char *prefix) {
- BusName *n = BUSNAME(u);
-
- assert(n);
- assert(f);
-
- fprintf(f,
- "%sBus Name State: %s\n"
- "%sResult: %s\n"
- "%sName: %s\n"
- "%sActivating: %s\n"
- "%sAccept FD: %s\n",
- prefix, busname_state_to_string(n->state),
- prefix, busname_result_to_string(n->result),
- prefix, n->name,
- prefix, yes_no(n->activating),
- prefix, yes_no(n->accept_fd));
-
- if (n->control_pid > 0)
- fprintf(f,
- "%sControl PID: "PID_FMT"\n",
- prefix, n->control_pid);
-}
-
-static void busname_unwatch_fd(BusName *n) {
- int r;
-
- assert(n);
-
- if (!n->starter_event_source)
- return;
-
- r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_OFF);
- if (r < 0)
- log_unit_debug_errno(UNIT(n), r, "Failed to disable event source: %m");
-}
-
-static int busname_watch_fd(BusName *n) {
- int r;
-
- assert(n);
-
- if (n->starter_fd < 0)
- return 0;
-
- if (n->starter_event_source) {
- r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_ON);
- if (r < 0)
- goto fail;
- } else {
- r = sd_event_add_io(UNIT(n)->manager->event, &n->starter_event_source, n->starter_fd, EPOLLIN, busname_dispatch_io, n);
- if (r < 0)
- goto fail;
-
- (void) sd_event_source_set_description(n->starter_event_source, "busname-starter");
- }
-
- return 0;
-
-fail:
- log_unit_warning_errno(UNIT(n), r, "Failed to watch starter fd: %m");
- busname_unwatch_fd(n);
- return r;
-}
-
-static int busname_open_fd(BusName *n) {
- _cleanup_free_ char *path = NULL;
- const char *mode;
-
- assert(n);
-
- if (n->starter_fd >= 0)
- return 0;
-
- mode = MANAGER_IS_SYSTEM(UNIT(n)->manager) ? "system" : "user";
- n->starter_fd = bus_kernel_open_bus_fd(mode, &path);
- if (n->starter_fd < 0)
- return log_unit_warning_errno(UNIT(n), n->starter_fd, "Failed to open %s: %m", path ?: "kdbus");
-
- return 0;
-}
-
-static void busname_set_state(BusName *n, BusNameState state) {
- BusNameState old_state;
- assert(n);
-
- old_state = n->state;
- n->state = state;
-
- if (!IN_SET(state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) {
- n->timer_event_source = sd_event_source_unref(n->timer_event_source);
- busname_unwatch_control_pid(n);
- }
-
- if (state != BUSNAME_LISTENING)
- busname_unwatch_fd(n);
-
- if (!IN_SET(state, BUSNAME_LISTENING, BUSNAME_MAKING, BUSNAME_REGISTERED, BUSNAME_RUNNING))
- busname_close_fd(n);
-
- if (state != old_state)
- log_unit_debug(UNIT(n), "Changed %s -> %s", busname_state_to_string(old_state), busname_state_to_string(state));
-
- unit_notify(UNIT(n), state_translation_table[old_state], state_translation_table[state], true);
-}
-
-static int busname_coldplug(Unit *u) {
- BusName *n = BUSNAME(u);
- int r;
-
- assert(n);
- assert(n->state == BUSNAME_DEAD);
-
- if (n->deserialized_state == n->state)
- return 0;
-
- if (n->control_pid > 0 &&
- pid_is_unwaited(n->control_pid) &&
- IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) {
-
- r = unit_watch_pid(UNIT(n), n->control_pid);
- if (r < 0)
- return r;
-
- r = busname_arm_timer(n, usec_add(u->state_change_timestamp.monotonic, n->timeout_usec));
- if (r < 0)
- return r;
- }
-
- if (IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_LISTENING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) {
- r = busname_open_fd(n);
- if (r < 0)
- return r;
- }
-
- if (n->deserialized_state == BUSNAME_LISTENING) {
- r = busname_watch_fd(n);
- if (r < 0)
- return r;
- }
-
- busname_set_state(n, n->deserialized_state);
- return 0;
-}
-
-static int busname_make_starter(BusName *n, pid_t *_pid) {
- pid_t pid;
- int r;
-
- r = busname_arm_timer(n, usec_add(now(CLOCK_MONOTONIC), n->timeout_usec));
- if (r < 0)
- goto fail;
-
- /* We have to resolve the user/group names out-of-process,
- * hence let's fork here. It's messy, but well, what can we
- * do? */
-
- pid = fork();
- if (pid < 0)
- return -errno;
-
- if (pid == 0) {
- int ret;
-
- (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1);
- (void) ignore_signals(SIGPIPE, -1);
- log_forget_fds();
-
- r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, n->policy, n->policy_world);
- if (r < 0) {
- ret = EXIT_MAKE_STARTER;
- goto fail_child;
- }
-
- _exit(0);
-
- fail_child:
- log_open();
- log_error_errno(r, "Failed to create starter connection at step %s: %m", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD));
-
- _exit(ret);
- }
-
- r = unit_watch_pid(UNIT(n), pid);
- if (r < 0)
- goto fail;
-
- *_pid = pid;
- return 0;
-
-fail:
- n->timer_event_source = sd_event_source_unref(n->timer_event_source);
- return r;
-}
-
-static void busname_enter_dead(BusName *n, BusNameResult f) {
- assert(n);
-
- if (n->result == BUSNAME_SUCCESS)
- n->result = f;
-
- busname_set_state(n, n->result != BUSNAME_SUCCESS ? BUSNAME_FAILED : BUSNAME_DEAD);
-}
-
-static void busname_enter_signal(BusName *n, BusNameState state, BusNameResult f) {
- KillContext kill_context = {};
- int r;
-
- assert(n);
-
- if (n->result == BUSNAME_SUCCESS)
- n->result = f;
-
- kill_context_init(&kill_context);
-
- r = unit_kill_context(UNIT(n),
- &kill_context,
- state != BUSNAME_SIGTERM ? KILL_KILL : KILL_TERMINATE,
- -1,
- n->control_pid,
- false);
- if (r < 0) {
- log_unit_warning_errno(UNIT(n), r, "Failed to kill control process: %m");
- goto fail;
- }
-
- if (r > 0) {
- r = busname_arm_timer(n, usec_add(now(CLOCK_MONOTONIC), n->timeout_usec));
- if (r < 0) {
- log_unit_warning_errno(UNIT(n), r, "Failed to arm timer: %m");
- goto fail;
- }
-
- busname_set_state(n, state);
- } else if (state == BUSNAME_SIGTERM)
- busname_enter_signal(n, BUSNAME_SIGKILL, BUSNAME_SUCCESS);
- else
- busname_enter_dead(n, BUSNAME_SUCCESS);
-
- return;
-
-fail:
- busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES);
-}
-
-static void busname_enter_listening(BusName *n) {
- int r;
-
- assert(n);
-
- if (n->activating) {
- r = busname_watch_fd(n);
- if (r < 0) {
- log_unit_warning_errno(UNIT(n), r, "Failed to watch names: %m");
- goto fail;
- }
-
- busname_set_state(n, BUSNAME_LISTENING);
- } else
- busname_set_state(n, BUSNAME_REGISTERED);
-
- return;
-
-fail:
- busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_FAILURE_RESOURCES);
-}
-
-static void busname_enter_making(BusName *n) {
- int r;
-
- assert(n);
-
- r = busname_open_fd(n);
- if (r < 0)
- goto fail;
-
- if (n->policy) {
- /* If there is a policy, we need to resolve user/group
- * names, which we can't do from PID1, hence let's
- * fork. */
- busname_unwatch_control_pid(n);
-
- r = busname_make_starter(n, &n->control_pid);
- if (r < 0) {
- log_unit_warning_errno(UNIT(n), r, "Failed to fork 'making' task: %m");
- goto fail;
- }
-
- busname_set_state(n, BUSNAME_MAKING);
- } else {
- /* If there is no policy, we can do everything
- * directly from PID 1, hence do so. */
-
- r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, NULL, n->policy_world);
- if (r < 0) {
- log_unit_warning_errno(UNIT(n), r, "Failed to make starter: %m");
- goto fail;
- }
-
- busname_enter_listening(n);
- }
-
- return;
-
-fail:
- busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES);
-}
-
-static void busname_enter_running(BusName *n) {
- _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
- bool pending = false;
- Unit *other;
- Iterator i;
- int r;
-
- assert(n);
-
- if (!n->activating)
- return;
-
- /* We don't take connections anymore if we are supposed to
- * shut down anyway */
-
- if (unit_stop_pending(UNIT(n))) {
- log_unit_debug(UNIT(n), "Suppressing activation request since unit stop is scheduled.");
-
- /* Flush all queued activation reqeuest by closing and reopening the connection */
- bus_kernel_drop_one(n->starter_fd);
-
- busname_enter_listening(n);
- return;
- }
-
- /* If there's already a start pending don't bother to do
- * anything */
- SET_FOREACH(other, UNIT(n)->dependencies[UNIT_TRIGGERS], i)
- if (unit_active_or_pending(other)) {
- pending = true;
- break;
- }
-
- if (!pending) {
- if (!UNIT_ISSET(n->service)) {
- log_unit_error(UNIT(n), "Service to activate vanished, refusing activation.");
- r = -ENOENT;
- goto fail;
- }
-
- r = manager_add_job(UNIT(n)->manager, JOB_START, UNIT_DEREF(n->service), JOB_REPLACE, &error, NULL);
- if (r < 0)
- goto fail;
- }
-
- busname_set_state(n, BUSNAME_RUNNING);
- return;
-
-fail:
- log_unit_warning(UNIT(n), "Failed to queue service startup job: %s", bus_error_message(&error, r));
- busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES);
-}
-
-static int busname_start(Unit *u) {
- BusName *n = BUSNAME(u);
- int r;
-
- assert(n);
-
- /* We cannot fulfill this request right now, try again later
- * please! */
- if (IN_SET(n->state, BUSNAME_SIGTERM, BUSNAME_SIGKILL))
- return -EAGAIN;
-
- /* Already on it! */
- if (n->state == BUSNAME_MAKING)
- return 0;
-
- if (n->activating && UNIT_ISSET(n->service)) {
- Service *service;
-
- service = SERVICE(UNIT_DEREF(n->service));
-
- if (UNIT(service)->load_state != UNIT_LOADED) {
- log_unit_error(u, "Bus service %s not loaded, refusing.", UNIT(service)->id);
- return -ENOENT;
- }
- }
-
- assert(IN_SET(n->state, BUSNAME_DEAD, BUSNAME_FAILED));
-
- r = unit_start_limit_test(u);
- if (r < 0) {
- busname_enter_dead(n, BUSNAME_FAILURE_START_LIMIT_HIT);
- return r;
- }
-
- r = unit_acquire_invocation_id(u);
- if (r < 0)
- return r;
-
- n->result = BUSNAME_SUCCESS;
- busname_enter_making(n);
-
- return 1;
-}
-
-static int busname_stop(Unit *u) {
- BusName *n = BUSNAME(u);
-
- assert(n);
-
- /* Already on it */
- if (IN_SET(n->state, BUSNAME_SIGTERM, BUSNAME_SIGKILL))
- return 0;
-
- /* If there's already something running, we go directly into
- * kill mode. */
-
- if (n->state == BUSNAME_MAKING) {
- busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_SUCCESS);
- return -EAGAIN;
- }
-
- assert(IN_SET(n->state, BUSNAME_REGISTERED, BUSNAME_LISTENING, BUSNAME_RUNNING));
-
- busname_enter_dead(n, BUSNAME_SUCCESS);
- return 1;
-}
-
-static int busname_serialize(Unit *u, FILE *f, FDSet *fds) {
- BusName *n = BUSNAME(u);
- int r;
-
- assert(n);
- assert(f);
- assert(fds);
-
- unit_serialize_item(u, f, "state", busname_state_to_string(n->state));
- unit_serialize_item(u, f, "result", busname_result_to_string(n->result));
-
- if (n->control_pid > 0)
- unit_serialize_item_format(u, f, "control-pid", PID_FMT, n->control_pid);
-
- r = unit_serialize_item_fd(u, f, fds, "starter-fd", n->starter_fd);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int busname_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
- BusName *n = BUSNAME(u);
-
- assert(n);
- assert(key);
- assert(value);
-
- if (streq(key, "state")) {
- BusNameState state;
-
- state = busname_state_from_string(value);
- if (state < 0)
- log_unit_debug(u, "Failed to parse state value: %s", value);
- else
- n->deserialized_state = state;
-
- } else if (streq(key, "result")) {
- BusNameResult f;
-
- f = busname_result_from_string(value);
- if (f < 0)
- log_unit_debug(u, "Failed to parse result value: %s", value);
- else if (f != BUSNAME_SUCCESS)
- n->result = f;
-
- } else if (streq(key, "control-pid")) {
- pid_t pid;
-
- if (parse_pid(value, &pid) < 0)
- log_unit_debug(u, "Failed to parse control-pid value: %s", value);
- else
- n->control_pid = pid;
- } else if (streq(key, "starter-fd")) {
- int fd;
-
- if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
- log_unit_debug(u, "Failed to parse starter fd value: %s", value);
- else {
- safe_close(n->starter_fd);
- n->starter_fd = fdset_remove(fds, fd);
- }
- } else
- log_unit_debug(u, "Unknown serialization key: %s", key);
-
- return 0;
-}
-
-_pure_ static UnitActiveState busname_active_state(Unit *u) {
- assert(u);
-
- return state_translation_table[BUSNAME(u)->state];
-}
-
-_pure_ static const char *busname_sub_state_to_string(Unit *u) {
- assert(u);
-
- return busname_state_to_string(BUSNAME(u)->state);
-}
-
-static int busname_peek_message(BusName *n) {
- struct kdbus_cmd_recv cmd_recv = {
- .size = sizeof(cmd_recv),
- .flags = KDBUS_RECV_PEEK,
- };
- struct kdbus_cmd_free cmd_free = {
- .size = sizeof(cmd_free),
- };
- const char *comm = NULL;
- struct kdbus_item *d;
- struct kdbus_msg *k;
- size_t start, ps, sz, delta;
- void *p = MAP_FAILED;
- pid_t pid = 0;
- int r;
-
- /* Generate a friendly debug log message about which process
- * caused triggering of this bus name. This simply peeks the
- * metadata of the first queued message and logs it. */
-
- assert(n);
-
- /* Let's shortcut things a bit, if debug logging is turned off
- * anyway. */
-
- if (log_get_max_level() < LOG_DEBUG)
- return 0;
-
- r = ioctl(n->starter_fd, KDBUS_CMD_RECV, &cmd_recv);
- if (r < 0) {
- if (errno == EINTR || errno == EAGAIN)
- return 0;
-
- return log_unit_error_errno(UNIT(n), errno, "Failed to query activation message: %m");
- }
-
- /* We map as late as possible, and unmap imemdiately after
- * use. On 32bit address space is scarce and we want to be
- * able to handle a lot of activator connections at the same
- * time, and hence shouldn't keep the mmap()s around for
- * longer than necessary. */
-
- ps = page_size();
- start = (cmd_recv.msg.offset / ps) * ps;
- delta = cmd_recv.msg.offset - start;
- sz = PAGE_ALIGN(delta + cmd_recv.msg.msg_size);
-
- p = mmap(NULL, sz, PROT_READ, MAP_SHARED, n->starter_fd, start);
- if (p == MAP_FAILED) {
- r = log_unit_error_errno(UNIT(n), errno, "Failed to map activation message: %m");
- goto finish;
- }
-
- k = (struct kdbus_msg *) ((uint8_t *) p + delta);
- KDBUS_ITEM_FOREACH(d, k, items) {
- switch (d->type) {
-
- case KDBUS_ITEM_PIDS:
- pid = d->pids.pid;
- break;
-
- case KDBUS_ITEM_PID_COMM:
- comm = d->str;
- break;
- }
- }
-
- if (pid > 0)
- log_unit_debug(UNIT(n), "Activation triggered by process " PID_FMT " (%s)", pid, strna(comm));
-
- r = 0;
-
-finish:
- if (p != MAP_FAILED)
- (void) munmap(p, sz);
-
- cmd_free.offset = cmd_recv.msg.offset;
- if (ioctl(n->starter_fd, KDBUS_CMD_FREE, &cmd_free) < 0)
- log_unit_warning(UNIT(n), "Failed to free peeked message, ignoring: %m");
-
- return r;
-}
-
-static int busname_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
- BusName *n = userdata;
-
- assert(n);
- assert(fd >= 0);
-
- if (n->state != BUSNAME_LISTENING)
- return 0;
-
- log_unit_debug(UNIT(n), "Activation request");
-
- if (revents != EPOLLIN) {
- log_unit_error(UNIT(n), "Got unexpected poll event (0x%x) on starter fd.", revents);
- goto fail;
- }
-
- busname_peek_message(n);
- busname_enter_running(n);
- return 0;
-fail:
-
- busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES);
- return 0;
-}
-
-static void busname_sigchld_event(Unit *u, pid_t pid, int code, int status) {
- BusName *n = BUSNAME(u);
- BusNameResult f;
-
- assert(n);
- assert(pid >= 0);
-
- if (pid != n->control_pid)
- return;
-
- n->control_pid = 0;
-
- if (is_clean_exit(code, status, EXIT_CLEAN_COMMAND, NULL))
- f = BUSNAME_SUCCESS;
- else if (code == CLD_EXITED)
- f = BUSNAME_FAILURE_EXIT_CODE;
- else if (code == CLD_KILLED)
- f = BUSNAME_FAILURE_SIGNAL;
- else if (code == CLD_DUMPED)
- f = BUSNAME_FAILURE_CORE_DUMP;
- else
- assert_not_reached("Unknown sigchld code");
-
- log_unit_full(u, f == BUSNAME_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
- "Control process exited, code=%s status=%i", sigchld_code_to_string(code), status);
-
- if (n->result == BUSNAME_SUCCESS)
- n->result = f;
-
- switch (n->state) {
-
- case BUSNAME_MAKING:
- if (f == BUSNAME_SUCCESS)
- busname_enter_listening(n);
- else
- busname_enter_signal(n, BUSNAME_SIGTERM, f);
- break;
-
- case BUSNAME_SIGTERM:
- case BUSNAME_SIGKILL:
- busname_enter_dead(n, f);
- break;
-
- default:
- assert_not_reached("Uh, control process died at wrong time.");
- }
-
- /* Notify clients about changed exit status */
- unit_add_to_dbus_queue(u);
-}
-
-static int busname_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
- BusName *n = BUSNAME(userdata);
-
- assert(n);
- assert(n->timer_event_source == source);
-
- switch (n->state) {
-
- case BUSNAME_MAKING:
- log_unit_warning(UNIT(n), "Making timed out. Terminating.");
- busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_FAILURE_TIMEOUT);
- break;
-
- case BUSNAME_SIGTERM:
- log_unit_warning(UNIT(n), "Stopping timed out. Killing.");
- busname_enter_signal(n, BUSNAME_SIGKILL, BUSNAME_FAILURE_TIMEOUT);
- break;
-
- case BUSNAME_SIGKILL:
- log_unit_warning(UNIT(n), "Processes still around after SIGKILL. Ignoring.");
- busname_enter_dead(n, BUSNAME_FAILURE_TIMEOUT);
- break;
-
- default:
- assert_not_reached("Timeout at wrong time.");
- }
-
- return 0;
-}
-
-static void busname_reset_failed(Unit *u) {
- BusName *n = BUSNAME(u);
-
- assert(n);
-
- if (n->state == BUSNAME_FAILED)
- busname_set_state(n, BUSNAME_DEAD);
-
- n->result = BUSNAME_SUCCESS;
-}
-
-static void busname_trigger_notify(Unit *u, Unit *other) {
- BusName *n = BUSNAME(u);
-
- assert(n);
- assert(other);
-
- if (!IN_SET(n->state, BUSNAME_RUNNING, BUSNAME_LISTENING))
- return;
-
- if (other->start_limit_hit) {
- busname_enter_dead(n, BUSNAME_FAILURE_SERVICE_START_LIMIT_HIT);
- return;
- }
-
- if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE)
- return;
-
- if (IN_SET(SERVICE(other)->state,
- SERVICE_DEAD, SERVICE_FAILED,
- SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
- SERVICE_AUTO_RESTART))
- busname_enter_listening(n);
-
- if (SERVICE(other)->state == SERVICE_RUNNING)
- busname_set_state(n, BUSNAME_RUNNING);
-}
-
-static int busname_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
- return unit_kill_common(u, who, signo, -1, BUSNAME(u)->control_pid, error);
-}
-
-static int busname_get_timeout(Unit *u, usec_t *timeout) {
- BusName *n = BUSNAME(u);
- usec_t t;
- int r;
-
- if (!n->timer_event_source)
- return 0;
-
- r = sd_event_source_get_time(n->timer_event_source, &t);
- if (r < 0)
- return r;
- if (t == USEC_INFINITY)
- return 0;
-
- *timeout = t;
- return 1;
-}
-
-static bool busname_supported(void) {
- return false;
-}
-
-static int busname_control_pid(Unit *u) {
- BusName *n = BUSNAME(u);
-
- assert(n);
-
- return n->control_pid;
-}
-
-static const char* const busname_result_table[_BUSNAME_RESULT_MAX] = {
- [BUSNAME_SUCCESS] = "success",
- [BUSNAME_FAILURE_RESOURCES] = "resources",
- [BUSNAME_FAILURE_TIMEOUT] = "timeout",
- [BUSNAME_FAILURE_EXIT_CODE] = "exit-code",
- [BUSNAME_FAILURE_SIGNAL] = "signal",
- [BUSNAME_FAILURE_CORE_DUMP] = "core-dump",
- [BUSNAME_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
- [BUSNAME_FAILURE_SERVICE_START_LIMIT_HIT] = "service-start-limit-hit",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(busname_result, BusNameResult);
-
-const UnitVTable busname_vtable = {
- .object_size = sizeof(BusName),
-
- .sections =
- "Unit\0"
- "BusName\0"
- "Install\0",
- .private_section = "BusName",
-
- .init = busname_init,
- .done = busname_done,
- .load = busname_load,
-
- .coldplug = busname_coldplug,
-
- .dump = busname_dump,
-
- .start = busname_start,
- .stop = busname_stop,
-
- .kill = busname_kill,
-
- .get_timeout = busname_get_timeout,
-
- .serialize = busname_serialize,
- .deserialize_item = busname_deserialize_item,
-
- .active_state = busname_active_state,
- .sub_state_to_string = busname_sub_state_to_string,
-
- .sigchld_event = busname_sigchld_event,
-
- .trigger_notify = busname_trigger_notify,
-
- .reset_failed = busname_reset_failed,
-
- .supported = busname_supported,
-
- .control_pid = busname_control_pid,
-
- .bus_vtable = bus_busname_vtable,
-
- .status_message_formats = {
- .finished_start_job = {
- [JOB_DONE] = "Listening on %s.",
- [JOB_FAILED] = "Failed to listen on %s.",
- },
- .finished_stop_job = {
- [JOB_DONE] = "Closed %s.",
- [JOB_FAILED] = "Failed stopping %s.",
- },
- },
-};
projects / thirdparty / systemd.git / commitdiff
