X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=manager.c;h=6f3ff54d6ceaa64307edb54a1bfcacca1836cd70;hp=6c73acf403fc0abe43be94abea08ec05aaa3e495;hb=8d567588cad053f79abe603ab113e1b85a92f1da;hpb=6c1a047834c524598ee87c2bc289a1cd472ba53e diff --git a/manager.c b/manager.c index 6c73acf40..6f3ff54d6 100644 --- a/manager.c +++ b/manager.c @@ -27,11 +27,14 @@ #include #include #include +#include #include #include #include #include #include +#include +#include #include "manager.h" #include "hashmap.h" @@ -42,24 +45,53 @@ #include "ratelimit.h" #include "cgroup.h" #include "mount-setup.h" +#include "utmp-wtmp.h" +#include "unit-name.h" + +static int enable_special_signals(Manager *m) { + char fd; + + assert(m); + + /* Enable that we get SIGINT on control-alt-del */ + if (reboot(RB_DISABLE_CAD) < 0) + log_warning("Failed to enable ctrl-alt-del handling: %m"); + + if ((fd = open_terminal("/dev/tty0", O_RDWR)) < 0) + log_warning("Failed to open /dev/tty0: %m"); + else { + /* Enable that we get SIGWINCH on kbrequest */ + if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0) + log_warning("Failed to enable kbrequest handling: %s", strerror(errno)); + + close_nointr_nofail(fd); + } + + return 0; +} static int manager_setup_signals(Manager *m) { sigset_t mask; struct epoll_event ev; + struct sigaction sa; assert(m); + /* We are not interested in SIGSTOP and friends. */ + zero(sa); + sa.sa_handler = SIG_DFL; + sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; + assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); + assert_se(sigemptyset(&mask) == 0); assert_se(sigaddset(&mask, SIGCHLD) == 0); - assert_se(sigaddset(&mask, SIGINT) == 0); /* Kernel sends us this on control-alt-del */ - assert_se(sigaddset(&mask, SIGWINCH) == 0); /* Kernel sends us this on kbrequest (alt-arrowup) */ assert_se(sigaddset(&mask, SIGTERM) == 0); assert_se(sigaddset(&mask, SIGHUP) == 0); assert_se(sigaddset(&mask, SIGUSR1) == 0); assert_se(sigaddset(&mask, SIGUSR2) == 0); - assert_se(sigaddset(&mask, SIGPIPE) == 0); - assert_se(sigaddset(&mask, SIGPWR) == 0); - assert_se(sigaddset(&mask, SIGTTIN) == 0); + assert_se(sigaddset(&mask, SIGINT) == 0); /* Kernel sends us this on control-alt-del */ + assert_se(sigaddset(&mask, SIGWINCH) == 0); /* Kernel sends us this on kbrequest (alt-arrowup) */ + assert_se(sigaddset(&mask, SIGPWR) == 0); /* Some kernel drivers and upsd send us this on power failure */ assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); m->signal_watch.type = WATCH_SIGNAL; @@ -73,15 +105,8 @@ static int manager_setup_signals(Manager *m) { if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0) return -errno; - if (m->running_as == MANAGER_INIT) { - /* Enable that we get SIGINT on control-alt-del */ - if (reboot(RB_DISABLE_CAD) < 0) - log_warning("Failed to enable ctrl-alt-del handling: %s", strerror(errno)); - - /* Enable that we get SIGWINCH on kbrequest */ - if (ioctl(0, KDSIGACCEPT, SIGWINCH) < 0) - log_warning("Failed to enable kbrequest handling: %s", strerror(errno)); - } + if (m->running_as == MANAGER_INIT) + return enable_special_signals(m); return 0; } @@ -232,10 +257,24 @@ static int manager_find_paths(Manager *m) { NULL))) return -ENOMEM; } + + if ((e = getenv("SYSTEMD_SYSVRCND_PATH"))) + if (!(m->sysvrcnd_path = split_path_and_make_absolute(e))) + return -ENOMEM; + + if (strv_isempty(m->sysvrcnd_path)) { + strv_free(m->sysvrcnd_path); + + if (!(m->sysvrcnd_path = strv_new( + SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */ + NULL))) + return -ENOMEM; + } } strv_uniq(m->unit_path); strv_uniq(m->sysvinit_path); + strv_uniq(m->sysvrcnd_path); assert(!strv_isempty(m->unit_path)); if (!(t = strv_join(m->unit_path, "\n\t"))) @@ -253,10 +292,20 @@ static int manager_find_paths(Manager *m) { } else log_debug("Ignoring SysV init scripts."); + if (!strv_isempty(m->sysvrcnd_path)) { + + if (!(t = strv_join(m->sysvrcnd_path, "\n\t"))) + return -ENOMEM; + + log_debug("Looking for SysV rcN.d links in:\n\t%s", t); + free(t); + } else + log_debug("Ignoring SysV rcN.d links."); + return 0; } -int manager_new(ManagerRunningAs running_as, Manager **_m) { +int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **_m) { Manager *m; int r = -ENOMEM; @@ -267,8 +316,13 @@ int manager_new(ManagerRunningAs running_as, Manager **_m) { if (!(m = new0(Manager, 1))) return -ENOMEM; + m->boot_timestamp = now(CLOCK_REALTIME); + m->running_as = running_as; - m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = -1; + m->confirm_spawn = confirm_spawn; + m->name_data_slot = -1; + + m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = m->dev_autofs_fd = -1; m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */ if (!(m->units = hashmap_new(string_hash_func, string_compare_func))) @@ -286,6 +340,9 @@ int manager_new(ManagerRunningAs running_as, Manager **_m) { if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func))) goto fail; + if (!(m->watch_bus = hashmap_new(string_hash_func, string_compare_func))) + goto fail; + if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0) goto fail; @@ -355,6 +412,7 @@ void manager_free(Manager *m) { hashmap_free(m->jobs); hashmap_free(m->transaction_jobs); hashmap_free(m->watch_pids); + hashmap_free(m->watch_bus); if (m->epoll_fd >= 0) close_nointr(m->epoll_fd); @@ -363,6 +421,7 @@ void manager_free(Manager *m) { strv_free(m->unit_path); strv_free(m->sysvinit_path); + strv_free(m->sysvrcnd_path); free(m->cgroup_controller); free(m->cgroup_hierarchy); @@ -395,7 +454,7 @@ int manager_coldplug(Manager *m) { HASHMAP_FOREACH_KEY(u, k, m->units, i) { /* ignore aliases */ - if (unit_id(u) != k) + if (u->meta.id != k) continue; if (UNIT_VTABLE(u)->coldplug) @@ -403,6 +462,10 @@ int manager_coldplug(Manager *m) { return r; } + /* Now that the initial devices are available, let's see if we + * can write the utmp file */ + manager_write_utmp_reboot(m); + return 0; } @@ -506,7 +569,7 @@ static void transaction_merge_and_delete_job(Manager *m, Job *j, Job *other, Job j->type = t; j->state = JOB_WAITING; - j->forced = j->forced || other->forced; + j->override = j->override || other->override; j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor; @@ -578,7 +641,7 @@ static int delete_one_unmergeable_job(Manager *m, Job *j) { return -ENOEXEC; /* Ok, we can drop one, so let's do so. */ - log_debug("Trying to fix job merging by deleting job %s/%s", unit_id(d->unit), job_type_to_string(d->type)); + log_debug("Trying to fix job merging by deleting job %s/%s", d->unit->meta.id, job_type_to_string(d->type)); transaction_delete_job(m, d, true); return 0; } @@ -678,7 +741,7 @@ static void transaction_drop_redundant(Manager *m) { if (changes_something) continue; - log_debug("Found redundant job %s/%s, dropping.", unit_id(j->unit), job_type_to_string(j->type)); + log_debug("Found redundant job %s/%s, dropping.", j->unit->meta.id, job_type_to_string(j->type)); transaction_delete_job(m, j, false); again = true; break; @@ -724,17 +787,17 @@ static int transaction_verify_order_one(Manager *m, Job *j, Job *from, unsigned * since smart how we are we stored our way back in * there. */ - log_debug("Found ordering cycle on %s/%s", unit_id(j->unit), job_type_to_string(j->type)); + log_debug("Found ordering cycle on %s/%s", j->unit->meta.id, job_type_to_string(j->type)); for (k = from; k; k = (k->generation == generation ? k->marker : NULL)) { - log_debug("Walked on cycle path to %s/%s", unit_id(k->unit), job_type_to_string(k->type)); + log_debug("Walked on cycle path to %s/%s", k->unit->meta.id, job_type_to_string(k->type)); if (!k->installed && !unit_matters_to_anchor(k->unit, k)) { /* Ok, we can drop this one, so let's * do so. */ - log_debug("Breaking order cycle by deleting job %s/%s", unit_id(k->unit), job_type_to_string(k->type)); + log_debug("Breaking order cycle by deleting job %s/%s", k->unit->meta.id, job_type_to_string(k->type)); transaction_delete_unit(m, k->unit); return -EAGAIN; } @@ -815,7 +878,7 @@ static void transaction_collect_garbage(Manager *m) { if (j->object_list) continue; - log_debug("Garbage collecting job %s/%s", unit_id(j->unit), job_type_to_string(j->type)); + log_debug("Garbage collecting job %s/%s", j->unit->meta.id, job_type_to_string(j->type)); transaction_delete_job(m, j, true); again = true; break; @@ -883,13 +946,13 @@ static void transaction_minimize_impact(Manager *m) { continue; if (stops_running_service) - log_debug("%s/%s would stop a running service.", unit_id(j->unit), job_type_to_string(j->type)); + log_debug("%s/%s would stop a running service.", j->unit->meta.id, job_type_to_string(j->type)); if (changes_existing_job) - log_debug("%s/%s would change existing job.", unit_id(j->unit), job_type_to_string(j->type)); + log_debug("%s/%s would change existing job.", j->unit->meta.id, job_type_to_string(j->type)); /* Ok, let's get rid of this */ - log_debug("Deleting %s/%s to minimize impact.", unit_id(j->unit), job_type_to_string(j->type)); + log_debug("Deleting %s/%s to minimize impact.", j->unit->meta.id, job_type_to_string(j->type)); transaction_delete_job(m, j, true); again = true; @@ -1044,7 +1107,7 @@ rollback: return r; } -static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool force, bool *is_new) { +static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool override, bool *is_new) { Job *j, *f; int r; @@ -1075,7 +1138,7 @@ static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool f j->generation = 0; j->marker = NULL; j->matters_to_anchor = false; - j->forced = force; + j->override = override; LIST_PREPEND(Job, transaction, f, j); @@ -1087,7 +1150,7 @@ static Job* transaction_add_one_job(Manager *m, JobType type, Unit *unit, bool f if (is_new) *is_new = true; - log_debug("Added job %s/%s to transaction.", unit_id(unit), job_type_to_string(type)); + log_debug("Added job %s/%s to transaction.", unit->meta.id, job_type_to_string(type)); return j; } @@ -1118,14 +1181,21 @@ void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies if (other && delete_dependencies) { log_debug("Deleting job %s/%s as dependency of job %s/%s", - unit_id(other->unit), job_type_to_string(other->type), - unit_id(j->unit), job_type_to_string(j->type)); + other->unit->meta.id, job_type_to_string(other->type), + j->unit->meta.id, job_type_to_string(j->type)); transaction_delete_job(m, other, delete_dependencies); } } } -static int transaction_add_job_and_dependencies(Manager *m, JobType type, Unit *unit, Job *by, bool matters, bool force, Job **_ret) { +static int transaction_add_job_and_dependencies( + Manager *m, + JobType type, + Unit *unit, + Job *by, + bool matters, + bool override, + Job **_ret) { Job *ret; Iterator i; Unit *dep; @@ -1143,7 +1213,7 @@ static int transaction_add_job_and_dependencies(Manager *m, JobType type, Unit * return -EBADR; /* First add the job. */ - if (!(ret = transaction_add_one_job(m, type, unit, force, &is_new))) + if (!(ret = transaction_add_one_job(m, type, unit, override, &is_new))) return -ENOMEM; /* Then, add a link to the job. */ @@ -1154,28 +1224,33 @@ static int transaction_add_job_and_dependencies(Manager *m, JobType type, Unit * /* Finally, recursively add in all dependencies. */ if (type == JOB_START || type == JOB_RELOAD_OR_START) { SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, force, NULL)) < 0 && r != -EBADR) - goto fail; - SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_SOFT_REQUIRES], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !force, force, NULL)) < 0 && r != -EBADR) + if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, true, override, NULL)) < 0 && r != -EBADR) goto fail; + + SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) + if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, !override, override, NULL)) < 0 && r != -EBADR) + log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r)); + SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_WANTS], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, force, NULL)) < 0) - log_warning("Cannot add dependency job for unit %s, ignoring: %s", unit_id(dep), strerror(-r)); + if ((r = transaction_add_job_and_dependencies(m, JOB_START, dep, ret, false, false, NULL)) < 0) + log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r)); + SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, force, NULL)) < 0 && r != -EBADR) - goto fail; - SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_SOFT_REQUISITE], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !force, force, NULL)) < 0 && r != -EBADR) + if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, true, override, NULL)) < 0 && r != -EBADR) goto fail; + + SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) + if ((r = transaction_add_job_and_dependencies(m, JOB_VERIFY_ACTIVE, dep, ret, !override, override, NULL)) < 0 && r != -EBADR) + log_warning("Cannot add dependency job for unit %s, ignoring: %s", dep->meta.id, strerror(-r)); + SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_CONFLICTS], i) - if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, force, NULL)) < 0 && r != -EBADR) + if ((r = transaction_add_job_and_dependencies(m, JOB_STOP, dep, ret, true, override, NULL)) < 0 && r != -EBADR) goto fail; } else if (type == JOB_STOP || type == JOB_RESTART || type == JOB_TRY_RESTART) { SET_FOREACH(dep, ret->unit->meta.dependencies[UNIT_REQUIRED_BY], i) - if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, force, NULL)) < 0 && r != -EBADR) + if ((r = transaction_add_job_and_dependencies(m, type, dep, ret, true, override, NULL)) < 0 && r != -EBADR) goto fail; } @@ -1191,7 +1266,7 @@ fail: return r; } -int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret) { +int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, Job **_ret) { int r; Job *ret; @@ -1200,9 +1275,9 @@ int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool for assert(unit); assert(mode < _JOB_MODE_MAX); - log_debug("Trying to enqueue job %s/%s", unit_id(unit), job_type_to_string(type)); + log_debug("Trying to enqueue job %s/%s", unit->meta.id, job_type_to_string(type)); - if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, force, &ret)) < 0) { + if ((r = transaction_add_job_and_dependencies(m, type, unit, NULL, true, override, &ret)) < 0) { transaction_abort(m); return r; } @@ -1210,7 +1285,7 @@ int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool for if ((r = transaction_activate(m, mode)) < 0) return r; - log_debug("Enqueued job %s/%s as %u", unit_id(unit), job_type_to_string(type), (unsigned) ret->id); + log_debug("Enqueued job %s/%s as %u", unit->meta.id, job_type_to_string(type), (unsigned) ret->id); if (_ret) *_ret = ret; @@ -1218,6 +1293,21 @@ int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool for return 0; } +int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, Job **_ret) { + Unit *unit; + int r; + + assert(m); + assert(type < _JOB_TYPE_MAX); + assert(name); + assert(mode < _JOB_MODE_MAX); + + if ((r = manager_load_unit(m, name, NULL, &unit)) < 0) + return r; + + return manager_add_job(m, type, unit, mode, override, _ret); +} + Job *manager_get_job(Manager *m, uint32_t id) { assert(m); @@ -1257,19 +1347,24 @@ unsigned manager_dispatch_load_queue(Manager *m) { return n; } -int manager_load_unit(Manager *m, const char *path, Unit **_ret) { +int manager_load_unit(Manager *m, const char *name, const char *path, Unit **_ret) { Unit *ret; int r; - const char *name; assert(m); - assert(path); - assert(_ret); + assert(name || path); /* This will load the service information files, but not actually * start any services or anything. */ - name = file_name_from_path(path); + if (path && !is_path(path)) + return -EINVAL; + + if (!name) + name = file_name_from_path(path); + + if (!unit_name_is_valid(name)) + return -EINVAL; if ((ret = manager_get_unit(m, name))) { *_ret = ret; @@ -1279,12 +1374,11 @@ int manager_load_unit(Manager *m, const char *path, Unit **_ret) { if (!(ret = unit_new(m))) return -ENOMEM; - if (is_path(path)) { + if (path) if (!(ret->meta.fragment_path = strdup(path))) { unit_free(ret); return -ENOMEM; } - } if ((r = unit_add_name(ret, name)) < 0) { unit_free(ret); @@ -1296,7 +1390,9 @@ int manager_load_unit(Manager *m, const char *path, Unit **_ret) { manager_dispatch_load_queue(m); - *_ret = unit_follow_merge(ret); + if (_ret) + *_ret = unit_follow_merge(ret); + return 0; } @@ -1320,7 +1416,7 @@ void manager_dump_units(Manager *s, FILE *f, const char *prefix) { assert(f); HASHMAP_FOREACH_KEY(u, t, s->units, i) - if (unit_id(u) == t) + if (u->meta.id == t) unit_dump(u, f, prefix); } @@ -1389,33 +1485,58 @@ unsigned manager_dispatch_dbus_queue(Manager *m) { static int manager_dispatch_sigchld(Manager *m) { assert(m); - log_debug("dispatching SIGCHLD"); - for (;;) { siginfo_t si; Unit *u; zero(si); - if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG) < 0) { + + /* First we call waitd() for a PID and do not reap the + * zombie. That way we can still access /proc/$PID for + * it while it is a zombie. */ + if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) { if (errno == ECHILD) break; + if (errno == EINTR) + continue; + return -errno; } - if (si.si_pid == 0) + if (si.si_pid <= 0) break; + if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) { + char *name = NULL; + + get_process_name(si.si_pid, &name); + log_debug("Got SIGCHLD for process %llu (%s)", (unsigned long long) si.si_pid, strna(name)); + free(name); + } + + /* And now, we actually reap the zombie. */ + if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) { + if (errno == EINTR) + continue; + + return -errno; + } + if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED) continue; - log_debug("child %llu died (code=%s, status=%i)", (long long unsigned) si.si_pid, sigchld_code_to_string(si.si_code), si.si_status); + log_debug("Child %llu died (code=%s, status=%i/%s)", + (long long unsigned) si.si_pid, + sigchld_code_to_string(si.si_code), + si.si_status, + strna(si.si_code == CLD_EXITED ? exit_status_to_string(si.si_status) : strsignal(si.si_status))); if (!(u = hashmap_remove(m->watch_pids, UINT32_TO_PTR(si.si_pid)))) continue; - log_debug("child %llu belongs to %s", (long long unsigned) si.si_pid, unit_id(u)); + log_debug("Child %llu belongs to %s", (long long unsigned) si.si_pid, u->meta.id); UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status); } @@ -1423,6 +1544,13 @@ static int manager_dispatch_sigchld(Manager *m) { return 0; } +static void manager_start_target(Manager *m, const char *name) { + int r; + + if ((r = manager_add_job_by_name(m, JOB_START, name, JOB_REPLACE, true, NULL)) < 0) + log_error("Failed to enqueue %s job: %s", name, strerror(-r)); +} + static int manager_process_signal_fd(Manager *m, bool *quit) { ssize_t n; struct signalfd_siginfo sfsi; @@ -1451,49 +1579,52 @@ static int manager_process_signal_fd(Manager *m, bool *quit) { case SIGINT: case SIGTERM: - if (m->running_as != MANAGER_INIT) { - *quit = true; - return 0; - - } else { - Unit *target; - int r; - - if ((r = manager_load_unit(m, SPECIAL_CTRL_ALT_DEL_TARGET, &target)) < 0) - log_error("Failed to load ctrl-alt-del target: %s", strerror(-r)); - else if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, true, NULL)) < 0) - log_error("Failed to enqueue ctrl-alt-del job: %s", strerror(-r)); - + if (m->running_as == MANAGER_INIT) { + manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET); break; } - case SIGWINCH: + *quit = true; + return 0; - if (m->running_as == MANAGER_INIT) { - Unit *target; - int r; + case SIGWINCH: - if ((r = manager_load_unit(m, SPECIAL_KBREQUEST_TARGET, &target)) < 0) - log_error("Failed to load kbrequest target: %s", strerror(-r)); - else if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, true, NULL)) < 0) - log_error("Failed to enqueue kbrequest job: %s", strerror(-r)); + if (m->running_as == MANAGER_INIT) + manager_start_target(m, SPECIAL_KBREQUEST_TARGET); - break; - } + /* This is a nop on non-init */ + break; - /* This is a nop on non-init systemd's */ + case SIGPWR: + if (m->running_as == MANAGER_INIT) + manager_start_target(m, SPECIAL_SIGPWR_TARGET); + /* This is a nop on non-init */ break; case SIGUSR1: - - printf("→ By units:\n"); manager_dump_units(m, stdout, "\t"); - - printf("→ By jobs:\n"); manager_dump_jobs(m, stdout, "\t"); + break; + + case SIGUSR2: { + Unit *u; + + u = manager_get_unit(m, SPECIAL_DBUS_SERVICE); + + if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) { + log_info("Trying to reconnect to bus..."); + bus_init_system(m); + bus_init_api(m); + } + + if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) { + log_info("Loading D-Bus service..."); + manager_start_target(m, SPECIAL_DBUS_SERVICE); + } break; + } default: log_info("Got unhandled signal <%s>.", strsignal(sfsi.ssi_signo)); @@ -1674,6 +1805,106 @@ int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) { return 0; } +static bool manager_utmp_good(Manager *m) { + int r; + + assert(m); + + if ((r = mount_path_is_mounted(m, _PATH_UTMPX)) <= 0) { + + if (r < 0) + log_warning("Failed to determine whether " _PATH_UTMPX " is mounted: %s", strerror(-r)); + + return false; + } + + return true; +} + +void manager_write_utmp_reboot(Manager *m) { + int r; + + assert(m); + + if (m->utmp_reboot_written) + return; + + if (m->running_as != MANAGER_INIT) + return; + + if (!manager_utmp_good(m)) + return; + + if ((r = utmp_put_reboot(m->boot_timestamp)) < 0) { + + if (r != -ENOENT && r != -EROFS) + log_warning("Failed to write utmp/wtmp: %s", strerror(-r)); + + return; + } + + m->utmp_reboot_written = true; +} + +void manager_write_utmp_runlevel(Manager *m, Unit *u) { + int runlevel, r; + + assert(m); + assert(u); + + if (u->meta.type != UNIT_TARGET) + return; + + if (m->running_as != MANAGER_INIT) + return; + + if (!manager_utmp_good(m)) + return; + + if ((runlevel = target_get_runlevel(TARGET(u))) <= 0) + return; + + if ((r = utmp_put_runlevel(0, runlevel, 0)) < 0) { + + if (r != -ENOENT && r != -EROFS) + log_warning("Failed to write utmp/wtmp: %s", strerror(-r)); + } +} + +void manager_dispatch_bus_name_owner_changed( + Manager *m, + const char *name, + const char* old_owner, + const char *new_owner) { + + Unit *u; + + assert(m); + assert(name); + + if (!(u = hashmap_get(m->watch_bus, name))) + return; + + UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); +} + +void manager_dispatch_bus_query_pid_done( + Manager *m, + const char *name, + pid_t pid) { + + Unit *u; + + assert(m); + assert(name); + assert(pid >= 1); + + if (!(u = hashmap_get(m->watch_bus, name))) + return; + + UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid); +} + static const char* const manager_running_as_table[_MANAGER_RUNNING_AS_MAX] = { [MANAGER_INIT] = "init", [MANAGER_SYSTEM] = "system",