static void scope_enumerate_perpetual(Manager *m) { Unit *u; int r; assert(m); /* Let's unconditionally add the "init.scope" special unit * that encapsulates PID 1. Note that PID 1 already is in the * cgroup for this, we hence just need to allocate the object * for it and that's it. */ u = manager_get_unit(m, SPECIAL_INIT_SCOPE); if (!u) { r = unit_new_for_name(m, sizeof(Scope), SPECIAL_INIT_SCOPE, &u); if (r < 0) { log_error_errno(r, "Failed to allocate the special " SPECIAL_INIT_SCOPE " unit: %m"); return; } } u->transient = true; u->perpetual = true; SCOPE(u)->deserialized_state = SCOPE_RUNNING; unit_add_to_load_queue(u); unit_add_to_dbus_queue(u); }
static int slice_enumerate(Manager *m) { Unit *u; int r; assert(m); u = manager_get_unit(m, SPECIAL_ROOT_SLICE); if (!u) { u = unit_new(m, sizeof(Slice)); if (!u) return log_oom(); r = unit_add_name(u, SPECIAL_ROOT_SLICE); if (r < 0) { unit_free(u); return log_error_errno(r, "Failed to add -.slice name"); } } u->default_dependencies = false; u->no_gc = true; SLICE(u)->deserialized_state = SLICE_ACTIVE; if (!u->description) u->description = strdup("Root Slice"); if (!u->documentation) (void) strv_extend(&u->documentation, "man:systemd.special(7)"); unit_add_to_load_queue(u); unit_add_to_dbus_queue(u); return 0; }
static int on_controller_gone(sd_bus_track *track, void *userdata) { Scope *s = userdata; assert(track); if (s->controller) { log_unit_debug(UNIT(s), "Controller %s disappeared from bus.", s->controller); unit_add_to_dbus_queue(UNIT(s)); s->controller = mfree(s->controller); } s->controller_track = sd_bus_track_unref(s->controller_track); return 0; }
static void scope_enumerate(Manager *m) { Unit *u; int r; assert(m); /* Let's unconditionally add the "init.scope" special unit * that encapsulates PID 1. Note that PID 1 already is in the * cgroup for this, we hence just need to allocate the object * for it and that's it. */ u = manager_get_unit(m, SPECIAL_INIT_SCOPE); if (!u) { u = unit_new(m, sizeof(Scope)); if (!u) { log_oom(); return; } r = unit_add_name(u, SPECIAL_INIT_SCOPE); if (r < 0) { unit_free(u); log_error_errno(r, "Failed to add init.scope name"); return; } } u->transient = true; u->default_dependencies = false; u->no_gc = true; u->ignore_on_isolate = true; u->refuse_manual_start = true; u->refuse_manual_stop = true; SCOPE(u)->deserialized_state = SCOPE_RUNNING; SCOPE(u)->kill_context.kill_signal = SIGRTMIN+14; /* Prettify things, if we can. */ if (!u->description) u->description = strdup("System and Service Manager"); if (!u->documentation) (void) strv_extend(&u->documentation, "man:systemd(1)"); unit_add_to_load_queue(u); unit_add_to_dbus_queue(u); }
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 = NULL; 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; log_unit_error(UNIT(n)->id, "%s: Failed to query activation message: %m", UNIT(n)->id); return -errno; } /* 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) { log_unit_error(UNIT(n)->id, "%s: Failed to map activation message: %m", UNIT(n)->id); r = -errno; 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)->id, "%s: Activation triggered by process " PID_FMT " (%s)", UNIT(n)->id, pid, strna(comm)); r = 0; finish: if (p) (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)->id, "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)->id, "Activation request on %s", UNIT(n)->id); if (revents != EPOLLIN) { log_unit_error(UNIT(n)->id, "%s: Got unexpected poll event (0x%x) on starter fd.", UNIT(n)->id, 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, 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->id, f == BUSNAME_SUCCESS ? LOG_DEBUG : LOG_NOTICE, "%s control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status); if (f != 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); }