| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 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 |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <assert.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <sys/epoll.h> |
| #include <sys/timerfd.h> |
| #include <sys/poll.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <sys/stat.h> |
| |
| #include "set.h" |
| #include "unit.h" |
| #include "macro.h" |
| #include "strv.h" |
| #include "load-fragment.h" |
| #include "load-dropin.h" |
| #include "log.h" |
| #include "unit-name.h" |
| #include "specifier.h" |
| #include "dbus-unit.h" |
| #include "special.h" |
| #include "cgroup-util.h" |
| #include "missing.h" |
| #include "cgroup-attr.h" |
| |
| const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { |
| [UNIT_SERVICE] = &service_vtable, |
| [UNIT_TIMER] = &timer_vtable, |
| [UNIT_SOCKET] = &socket_vtable, |
| [UNIT_TARGET] = &target_vtable, |
| [UNIT_DEVICE] = &device_vtable, |
| [UNIT_MOUNT] = &mount_vtable, |
| [UNIT_AUTOMOUNT] = &automount_vtable, |
| [UNIT_SNAPSHOT] = &snapshot_vtable, |
| [UNIT_SWAP] = &swap_vtable, |
| [UNIT_PATH] = &path_vtable |
| }; |
| |
| Unit *unit_new(Manager *m, size_t size) { |
| Unit *u; |
| |
| assert(m); |
| assert(size >= sizeof(Unit)); |
| |
| u = malloc0(size); |
| if (!u) |
| return NULL; |
| |
| u->names = set_new(string_hash_func, string_compare_func); |
| if (!u->names) { |
| free(u); |
| return NULL; |
| } |
| |
| u->manager = m; |
| u->type = _UNIT_TYPE_INVALID; |
| u->deserialized_job = _JOB_TYPE_INVALID; |
| u->default_dependencies = true; |
| u->unit_file_state = _UNIT_FILE_STATE_INVALID; |
| |
| return u; |
| } |
| |
| bool unit_has_name(Unit *u, const char *name) { |
| assert(u); |
| assert(name); |
| |
| return !!set_get(u->names, (char*) name); |
| } |
| |
| int unit_add_name(Unit *u, const char *text) { |
| UnitType t; |
| char *s, *i = NULL; |
| int r; |
| |
| assert(u); |
| assert(text); |
| |
| if (unit_name_is_template(text)) { |
| if (!u->instance) |
| return -EINVAL; |
| |
| s = unit_name_replace_instance(text, u->instance); |
| } else |
| s = strdup(text); |
| |
| if (!s) |
| return -ENOMEM; |
| |
| if (!unit_name_is_valid(s, false)) { |
| r = -EINVAL; |
| goto fail; |
| } |
| |
| assert_se((t = unit_name_to_type(s)) >= 0); |
| |
| if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
| r = -EINVAL; |
| goto fail; |
| } |
| |
| if ((r = unit_name_to_instance(s, &i)) < 0) |
| goto fail; |
| |
| if (i && unit_vtable[t]->no_instances) { |
| r = -EINVAL; |
| goto fail; |
| } |
| |
| /* Ensure that this unit is either instanced or not instanced, |
| * but not both. */ |
| if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
| r = -EINVAL; |
| goto fail; |
| } |
| |
| if (unit_vtable[t]->no_alias && |
| !set_isempty(u->names) && |
| !set_get(u->names, s)) { |
| r = -EEXIST; |
| goto fail; |
| } |
| |
| if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
| r = -E2BIG; |
| goto fail; |
| } |
| |
| if ((r = set_put(u->names, s)) < 0) { |
| if (r == -EEXIST) |
| r = 0; |
| goto fail; |
| } |
| |
| if ((r = hashmap_put(u->manager->units, s, u)) < 0) { |
| set_remove(u->names, s); |
| goto fail; |
| } |
| |
| if (u->type == _UNIT_TYPE_INVALID) { |
| |
| u->type = t; |
| u->id = s; |
| u->instance = i; |
| |
| LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u); |
| |
| if (UNIT_VTABLE(u)->init) |
| UNIT_VTABLE(u)->init(u); |
| } else |
| free(i); |
| |
| unit_add_to_dbus_queue(u); |
| return 0; |
| |
| fail: |
| free(s); |
| free(i); |
| |
| return r; |
| } |
| |
| int unit_choose_id(Unit *u, const char *name) { |
| char *s, *t = NULL, *i; |
| int r; |
| |
| assert(u); |
| assert(name); |
| |
| if (unit_name_is_template(name)) { |
| |
| if (!u->instance) |
| return -EINVAL; |
| |
| if (!(t = unit_name_replace_instance(name, u->instance))) |
| return -ENOMEM; |
| |
| name = t; |
| } |
| |
| /* Selects one of the names of this unit as the id */ |
| s = set_get(u->names, (char*) name); |
| free(t); |
| |
| if (!s) |
| return -ENOENT; |
| |
| if ((r = unit_name_to_instance(s, &i)) < 0) |
| return r; |
| |
| u->id = s; |
| |
| free(u->instance); |
| u->instance = i; |
| |
| unit_add_to_dbus_queue(u); |
| |
| return 0; |
| } |
| |
| int unit_set_description(Unit *u, const char *description) { |
| char *s; |
| |
| assert(u); |
| |
| if (!(s = strdup(description))) |
| return -ENOMEM; |
| |
| free(u->description); |
| u->description = s; |
| |
| unit_add_to_dbus_queue(u); |
| return 0; |
| } |
| |
| bool unit_check_gc(Unit *u) { |
| assert(u); |
| |
| if (u->load_state == UNIT_STUB) |
| return true; |
| |
| if (UNIT_VTABLE(u)->no_gc) |
| return true; |
| |
| if (u->no_gc) |
| return true; |
| |
| if (u->job) |
| return true; |
| |
| if (unit_active_state(u) != UNIT_INACTIVE) |
| return true; |
| |
| if (UNIT_VTABLE(u)->check_gc) |
| if (UNIT_VTABLE(u)->check_gc(u)) |
| return true; |
| |
| return false; |
| } |
| |
| void unit_add_to_load_queue(Unit *u) { |
| assert(u); |
| assert(u->type != _UNIT_TYPE_INVALID); |
| |
| if (u->load_state != UNIT_STUB || u->in_load_queue) |
| return; |
| |
| LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u); |
| u->in_load_queue = true; |
| } |
| |
| void unit_add_to_cleanup_queue(Unit *u) { |
| assert(u); |
| |
| if (u->in_cleanup_queue) |
| return; |
| |
| LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
| u->in_cleanup_queue = true; |
| } |
| |
| void unit_add_to_gc_queue(Unit *u) { |
| assert(u); |
| |
| if (u->in_gc_queue || u->in_cleanup_queue) |
| return; |
| |
| if (unit_check_gc(u)) |
| return; |
| |
| LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u); |
| u->in_gc_queue = true; |
| |
| u->manager->n_in_gc_queue ++; |
| |
| if (u->manager->gc_queue_timestamp <= 0) |
| u->manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); |
| } |
| |
| void unit_add_to_dbus_queue(Unit *u) { |
| assert(u); |
| assert(u->type != _UNIT_TYPE_INVALID); |
| |
| if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
| return; |
| |
| /* Shortcut things if nobody cares */ |
| if (!bus_has_subscriber(u->manager)) { |
| u->sent_dbus_new_signal = true; |
| return; |
| } |
| |
| LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
| u->in_dbus_queue = true; |
| } |
| |
| static void bidi_set_free(Unit *u, Set *s) { |
| Iterator i; |
| Unit *other; |
| |
| assert(u); |
| |
| /* Frees the set and makes sure we are dropped from the |
| * inverse pointers */ |
| |
| SET_FOREACH(other, s, i) { |
| UnitDependency d; |
| |
| for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
| set_remove(other->dependencies[d], u); |
| |
| unit_add_to_gc_queue(other); |
| } |
| |
| set_free(s); |
| } |
| |
| void unit_free(Unit *u) { |
| UnitDependency d; |
| Iterator i; |
| char *t; |
| |
| assert(u); |
| |
| bus_unit_send_removed_signal(u); |
| |
| if (u->load_state != UNIT_STUB) |
| if (UNIT_VTABLE(u)->done) |
| UNIT_VTABLE(u)->done(u); |
| |
| SET_FOREACH(t, u->names, i) |
| hashmap_remove_value(u->manager->units, t, u); |
| |
| if (u->job) |
| job_free(u->job); |
| |
| for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
| bidi_set_free(u, u->dependencies[d]); |
| |
| if (u->type != _UNIT_TYPE_INVALID) |
| LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u); |
| |
| if (u->in_load_queue) |
| LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); |
| |
| if (u->in_dbus_queue) |
| LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
| |
| if (u->in_cleanup_queue) |
| LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
| |
| if (u->in_gc_queue) { |
| LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u); |
| u->manager->n_in_gc_queue--; |
| } |
| |
| cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0); |
| cgroup_attribute_free_list(u->cgroup_attributes); |
| |
| free(u->description); |
| free(u->fragment_path); |
| free(u->instance); |
| |
| set_free_free(u->names); |
| |
| condition_free_list(u->conditions); |
| |
| while (u->refs) |
| unit_ref_unset(u->refs); |
| |
| free(u); |
| } |
| |
| UnitActiveState unit_active_state(Unit *u) { |
| assert(u); |
| |
| if (u->load_state == UNIT_MERGED) |
| return unit_active_state(unit_follow_merge(u)); |
| |
| /* After a reload it might happen that a unit is not correctly |
| * loaded but still has a process around. That's why we won't |
| * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
| |
| return UNIT_VTABLE(u)->active_state(u); |
| } |
| |
| const char* unit_sub_state_to_string(Unit *u) { |
| assert(u); |
| |
| return UNIT_VTABLE(u)->sub_state_to_string(u); |
| } |
| |
| static void complete_move(Set **s, Set **other) { |
| assert(s); |
| assert(other); |
| |
| if (!*other) |
| return; |
| |
| if (*s) |
| set_move(*s, *other); |
| else { |
| *s = *other; |
| *other = NULL; |
| } |
| } |
| |
| static void merge_names(Unit *u, Unit *other) { |
| char *t; |
| Iterator i; |
| |
| assert(u); |
| assert(other); |
| |
| complete_move(&u->names, &other->names); |
| |
| set_free_free(other->names); |
| other->names = NULL; |
| other->id = NULL; |
| |
| SET_FOREACH(t, u->names, i) |
| assert_se(hashmap_replace(u->manager->units, t, u) == 0); |
| } |
| |
| static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
| Iterator i; |
| Unit *back; |
| int r; |
| |
| assert(u); |
| assert(other); |
| assert(d < _UNIT_DEPENDENCY_MAX); |
| |
| /* Fix backwards pointers */ |
| SET_FOREACH(back, other->dependencies[d], i) { |
| UnitDependency k; |
| |
| for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) |
| if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) { |
| |
| if (r == -EEXIST) |
| set_remove(back->dependencies[k], other); |
| else |
| assert(r == -ENOENT); |
| } |
| } |
| |
| complete_move(&u->dependencies[d], &other->dependencies[d]); |
| |
| set_free(other->dependencies[d]); |
| other->dependencies[d] = NULL; |
| } |
| |
| int unit_merge(Unit *u, Unit *other) { |
| UnitDependency d; |
| |
| assert(u); |
| assert(other); |
| assert(u->manager == other->manager); |
| assert(u->type != _UNIT_TYPE_INVALID); |
| |
| other = unit_follow_merge(other); |
| |
| if (other == u) |
| return 0; |
| |
| if (u->type != other->type) |
| return -EINVAL; |
| |
| if (!u->instance != !other->instance) |
| return -EINVAL; |
| |
| if (other->load_state != UNIT_STUB && |
| other->load_state != UNIT_ERROR) |
| return -EEXIST; |
| |
| if (other->job) |
| return -EEXIST; |
| |
| if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
| return -EEXIST; |
| |
| /* Merge names */ |
| merge_names(u, other); |
| |
| /* Redirect all references */ |
| while (other->refs) |
| unit_ref_set(other->refs, u); |
| |
| /* Merge dependencies */ |
| for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
| merge_dependencies(u, other, d); |
| |
| other->load_state = UNIT_MERGED; |
| other->merged_into = u; |
| |
| /* If there is still some data attached to the other node, we |
| * don't need it anymore, and can free it. */ |
| if (other->load_state != UNIT_STUB) |
| if (UNIT_VTABLE(other)->done) |
| UNIT_VTABLE(other)->done(other); |
| |
| unit_add_to_dbus_queue(u); |
| unit_add_to_cleanup_queue(other); |
| |
| return 0; |
| } |
| |
| int unit_merge_by_name(Unit *u, const char *name) { |
| Unit *other; |
| int r; |
| char *s = NULL; |
| |
| assert(u); |
| assert(name); |
| |
| if (unit_name_is_template(name)) { |
| if (!u->instance) |
| return -EINVAL; |
| |
| if (!(s = unit_name_replace_instance(name, u->instance))) |
| return -ENOMEM; |
| |
| name = s; |
| } |
| |
| if (!(other = manager_get_unit(u->manager, name))) |
| r = unit_add_name(u, name); |
| else |
| r = unit_merge(u, other); |
| |
| free(s); |
| return r; |
| } |
| |
| Unit* unit_follow_merge(Unit *u) { |
| assert(u); |
| |
| while (u->load_state == UNIT_MERGED) |
| assert_se(u = u->merged_into); |
| |
| return u; |
| } |
| |
| int unit_add_exec_dependencies(Unit *u, ExecContext *c) { |
| int r; |
| |
| assert(u); |
| assert(c); |
| |
| if (c->std_output != EXEC_OUTPUT_KMSG && |
| c->std_output != EXEC_OUTPUT_SYSLOG && |
| c->std_output != EXEC_OUTPUT_JOURNAL && |
| c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
| c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && |
| c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
| c->std_error != EXEC_OUTPUT_KMSG && |
| c->std_error != EXEC_OUTPUT_SYSLOG && |
| c->std_error != EXEC_OUTPUT_JOURNAL && |
| c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
| c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
| c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
| return 0; |
| |
| /* If syslog or kernel logging is requested, make sure our own |
| * logging daemon is run first. */ |
| |
| if (u->manager->running_as == MANAGER_SYSTEM) |
| if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| const char *unit_description(Unit *u) { |
| assert(u); |
| |
| if (u->description) |
| return u->description; |
| |
| return strna(u->id); |
| } |
| |
| void unit_dump(Unit *u, FILE *f, const char *prefix) { |
| char *t; |
| UnitDependency d; |
| Iterator i; |
| char *p2; |
| const char *prefix2; |
| char |
| timestamp1[FORMAT_TIMESTAMP_MAX], |
| timestamp2[FORMAT_TIMESTAMP_MAX], |
| timestamp3[FORMAT_TIMESTAMP_MAX], |
| timestamp4[FORMAT_TIMESTAMP_MAX], |
| timespan[FORMAT_TIMESPAN_MAX]; |
| Unit *following; |
| |
| assert(u); |
| assert(u->type >= 0); |
| |
| if (!prefix) |
| prefix = ""; |
| p2 = strappend(prefix, "\t"); |
| prefix2 = p2 ? p2 : prefix; |
| |
| fprintf(f, |
| "%s-> Unit %s:\n" |
| "%s\tDescription: %s\n" |
| "%s\tInstance: %s\n" |
| "%s\tUnit Load State: %s\n" |
| "%s\tUnit Active State: %s\n" |
| "%s\tInactive Exit Timestamp: %s\n" |
| "%s\tActive Enter Timestamp: %s\n" |
| "%s\tActive Exit Timestamp: %s\n" |
| "%s\tInactive Enter Timestamp: %s\n" |
| "%s\tGC Check Good: %s\n" |
| "%s\tNeed Daemon Reload: %s\n", |
| prefix, u->id, |
| prefix, unit_description(u), |
| prefix, strna(u->instance), |
| prefix, unit_load_state_to_string(u->load_state), |
| prefix, unit_active_state_to_string(unit_active_state(u)), |
| prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
| prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), |
| prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), |
| prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), |
| prefix, yes_no(unit_check_gc(u)), |
| prefix, yes_no(unit_need_daemon_reload(u))); |
| |
| SET_FOREACH(t, u->names, i) |
| fprintf(f, "%s\tName: %s\n", prefix, t); |
| |
| if ((following = unit_following(u))) |
| fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
| |
| if (u->fragment_path) |
| fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); |
| |
| if (u->job_timeout > 0) |
| fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout)); |
| |
| condition_dump_list(u->conditions, f, prefix); |
| |
| if (dual_timestamp_is_set(&u->condition_timestamp)) |
| fprintf(f, |
| "%s\tCondition Timestamp: %s\n" |
| "%s\tCondition Result: %s\n", |
| prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
| prefix, yes_no(u->condition_result)); |
| |
| for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
| Unit *other; |
| |
| SET_FOREACH(other, u->dependencies[d], i) |
| fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); |
| } |
| |
| if (u->load_state == UNIT_LOADED) { |
| CGroupBonding *b; |
| CGroupAttribute *a; |
| |
| fprintf(f, |
| "%s\tStopWhenUnneeded: %s\n" |
| "%s\tRefuseManualStart: %s\n" |
| "%s\tRefuseManualStop: %s\n" |
| "%s\tDefaultDependencies: %s\n" |
| "%s\tOnFailureIsolate: %s\n" |
| "%s\tIgnoreOnIsolate: %s\n" |
| "%s\tIgnoreOnSnapshot: %s\n", |
| prefix, yes_no(u->stop_when_unneeded), |
| prefix, yes_no(u->refuse_manual_start), |
| prefix, yes_no(u->refuse_manual_stop), |
| prefix, yes_no(u->default_dependencies), |
| prefix, yes_no(u->on_failure_isolate), |
| prefix, yes_no(u->ignore_on_isolate), |
| prefix, yes_no(u->ignore_on_snapshot)); |
| |
| LIST_FOREACH(by_unit, b, u->cgroup_bondings) |
| fprintf(f, "%s\tControlGroup: %s:%s\n", |
| prefix, b->controller, b->path); |
| |
| LIST_FOREACH(by_unit, a, u->cgroup_attributes) { |
| char *v = NULL; |
| |
| if (a->map_callback) |
| a->map_callback(a->controller, a->name, a->value, &v); |
| |
| fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n", |
| prefix, a->controller, a->name, v ? v : a->value); |
| |
| free(v); |
| } |
| |
| if (UNIT_VTABLE(u)->dump) |
| UNIT_VTABLE(u)->dump(u, f, prefix2); |
| |
| } else if (u->load_state == UNIT_MERGED) |
| fprintf(f, |
| "%s\tMerged into: %s\n", |
| prefix, u->merged_into->id); |
| else if (u->load_state == UNIT_ERROR) |
| fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); |
| |
| |
| if (u->job) |
| job_dump(u->job, f, prefix2); |
| |
| free(p2); |
| } |
| |
| /* Common implementation for multiple backends */ |
| int unit_load_fragment_and_dropin(Unit *u) { |
| int r; |
| |
| assert(u); |
| |
| /* Load a .service file */ |
| if ((r = unit_load_fragment(u)) < 0) |
| return r; |
| |
| if (u->load_state == UNIT_STUB) |
| return -ENOENT; |
| |
| /* Load drop-in directory data */ |
| if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| /* Common implementation for multiple backends */ |
| int unit_load_fragment_and_dropin_optional(Unit *u) { |
| int r; |
| |
| assert(u); |
| |
| /* Same as unit_load_fragment_and_dropin(), but whether |
| * something can be loaded or not doesn't matter. */ |
| |
| /* Load a .service file */ |
| if ((r = unit_load_fragment(u)) < 0) |
| return r; |
| |
| if (u->load_state == UNIT_STUB) |
| u->load_state = UNIT_LOADED; |
| |
| /* Load drop-in directory data */ |
| if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int unit_add_default_target_dependency(Unit *u, Unit *target) { |
| assert(u); |
| assert(target); |
| |
| if (target->type != UNIT_TARGET) |
| return 0; |
| |
| /* Only add the dependency if both units are loaded, so that |
| * that loop check below is reliable */ |
| if (u->load_state != UNIT_LOADED || |
| target->load_state != UNIT_LOADED) |
| return 0; |
| |
| /* If either side wants no automatic dependencies, then let's |
| * skip this */ |
| if (!u->default_dependencies || |
| !target->default_dependencies) |
| return 0; |
| |
| /* Don't create loops */ |
| if (set_get(target->dependencies[UNIT_BEFORE], u)) |
| return 0; |
| |
| return unit_add_dependency(target, UNIT_AFTER, u, true); |
| } |
| |
| static int unit_add_default_dependencies(Unit *u) { |
| static const UnitDependency deps[] = { |
| UNIT_REQUIRED_BY, |
| UNIT_REQUIRED_BY_OVERRIDABLE, |
| UNIT_WANTED_BY, |
| UNIT_BOUND_BY |
| }; |
| |
| Unit *target; |
| Iterator i; |
| int r; |
| unsigned k; |
| |
| assert(u); |
| |
| for (k = 0; k < ELEMENTSOF(deps); k++) |
| SET_FOREACH(target, u->dependencies[deps[k]], i) |
| if ((r = unit_add_default_target_dependency(u, target)) < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int unit_load(Unit *u) { |
| int r; |
| |
| assert(u); |
| |
| if (u->in_load_queue) { |
| LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); |
| u->in_load_queue = false; |
| } |
| |
| if (u->type == _UNIT_TYPE_INVALID) |
| return -EINVAL; |
| |
| if (u->load_state != UNIT_STUB) |
| return 0; |
| |
| if (UNIT_VTABLE(u)->load) |
| if ((r = UNIT_VTABLE(u)->load(u)) < 0) |
| goto fail; |
| |
| if (u->load_state == UNIT_STUB) { |
| r = -ENOENT; |
| goto fail; |
| } |
| |
| if (u->load_state == UNIT_LOADED && |
| u->default_dependencies) |
| if ((r = unit_add_default_dependencies(u)) < 0) |
| goto fail; |
| |
| if (u->on_failure_isolate && |
| set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
| |
| log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", |
| u->id); |
| |
| r = -EINVAL; |
| goto fail; |
| } |
| |
| assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
| |
| unit_add_to_dbus_queue(unit_follow_merge(u)); |
| unit_add_to_gc_queue(u); |
| |
| return 0; |
| |
| fail: |
| u->load_state = UNIT_ERROR; |
| u->load_error = r; |
| unit_add_to_dbus_queue(u); |
| unit_add_to_gc_queue(u); |
| |
| log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r)); |
| |
| return r; |
| } |
| |
| bool unit_condition_test(Unit *u) { |
| assert(u); |
| |
| dual_timestamp_get(&u->condition_timestamp); |
| u->condition_result = condition_test_list(u->conditions); |
| |
| return u->condition_result; |
| } |
| |
| /* Errors: |
| * -EBADR: This unit type does not support starting. |
| * -EALREADY: Unit is already started. |
| * -EAGAIN: An operation is already in progress. Retry later. |
| * -ECANCELED: Too many requests for now. |
| */ |
| int unit_start(Unit *u) { |
| UnitActiveState state; |
| Unit *following; |
| |
| assert(u); |
| |
| if (u->load_state != UNIT_LOADED) |
| return -EINVAL; |
| |
| /* If this is already started, then this will succeed. Note |
| * that this will even succeed if this unit is not startable |
| * by the user. This is relied on to detect when we need to |
| * wait for units and when waiting is finished. */ |
| state = unit_active_state(u); |
| if (UNIT_IS_ACTIVE_OR_RELOADING(state)) |
| return -EALREADY; |
| |
| /* If the conditions failed, don't do anything at all. If we |
| * already are activating this call might still be useful to |
| * speed up activation in case there is some hold-off time, |
| * but we don't want to recheck the condition in that case. */ |
| if (state != UNIT_ACTIVATING && |
| !unit_condition_test(u)) { |
| log_debug("Starting of %s requested but condition failed. Ignoring.", u->id); |
| return -EALREADY; |
| } |
| |
| /* Forward to the main object, if we aren't it. */ |
| if ((following = unit_following(u))) { |
| log_debug("Redirecting start request from %s to %s.", u->id, following->id); |
| return unit_start(following); |
| } |
| |
| /* If it is stopped, but we cannot start it, then fail */ |
| if (!UNIT_VTABLE(u)->start) |
| return -EBADR; |
| |
| /* We don't suppress calls to ->start() here when we are |
| * already starting, to allow this request to be used as a |
| * "hurry up" call, for example when the unit is in some "auto |
| * restart" state where it waits for a holdoff timer to elapse |
| * before it will start again. */ |
| |
| unit_add_to_dbus_queue(u); |
| |
| unit_status_printf(u, NULL, "Starting %s...", unit_description(u)); |
| return UNIT_VTABLE(u)->start(u); |
| } |
| |
| bool unit_can_start(Unit *u) { |
| assert(u); |
| |
| return !!UNIT_VTABLE(u)->start; |
| } |
| |
| bool unit_can_isolate(Unit *u) { |
| assert(u); |
| |
| return unit_can_start(u) && |
| u->allow_isolate; |
| } |
| |
| /* Errors: |
| * -EBADR: This unit type does not support stopping. |
| * -EALREADY: Unit is already stopped. |
| * -EAGAIN: An operation is already in progress. Retry later. |
| */ |
| int unit_stop(Unit *u) { |
| UnitActiveState state; |
| Unit *following; |
| |
| assert(u); |
| |
| state = unit_active_state(u); |
| if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
| return -EALREADY; |
| |
| if ((following = unit_following(u))) { |
| log_debug("Redirecting stop request from %s to %s.", u->id, following->id); |
| return unit_stop(following); |
| } |
| |
| if (!UNIT_VTABLE(u)->stop) |
| return -EBADR; |
| |
| unit_add_to_dbus_queue(u); |
| |
| unit_status_printf(u, NULL, "Stopping %s...", unit_description(u)); |
| return UNIT_VTABLE(u)->stop(u); |
| } |
| |
| /* Errors: |
| * -EBADR: This unit type does not support reloading. |
| * -ENOEXEC: Unit is not started. |
| * -EAGAIN: An operation is already in progress. Retry later. |
| */ |
| int unit_reload(Unit *u) { |
| UnitActiveState state; |
| Unit *following; |
| |
| assert(u); |
| |
| if (u->load_state != UNIT_LOADED) |
| return -EINVAL; |
| |
| if (!unit_can_reload(u)) |
| return -EBADR; |
| |
| state = unit_active_state(u); |
| if (state == UNIT_RELOADING) |
| return -EALREADY; |
| |
| if (state != UNIT_ACTIVE) |
| return -ENOEXEC; |
| |
| if ((following = unit_following(u))) { |
| log_debug("Redirecting reload request from %s to %s.", u->id, following->id); |
| return unit_reload(following); |
| } |
| |
| unit_add_to_dbus_queue(u); |
| return UNIT_VTABLE(u)->reload(u); |
| } |
| |
| bool unit_can_reload(Unit *u) { |
| assert(u); |
| |
| if (!UNIT_VTABLE(u)->reload) |
| return false; |
| |
| if (!UNIT_VTABLE(u)->can_reload) |
| return true; |
| |
| return UNIT_VTABLE(u)->can_reload(u); |
| } |
| |
| static void unit_check_unneeded(Unit *u) { |
| Iterator i; |
| Unit *other; |
| |
| assert(u); |
| |
| /* If this service shall be shut down when unneeded then do |
| * so. */ |
| |
| if (!u->stop_when_unneeded) |
| return; |
| |
| if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) |
| return; |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
| if (unit_pending_active(other)) |
| return; |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
| if (unit_pending_active(other)) |
| return; |
| |
| SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
| if (unit_pending_active(other)) |
| return; |
| |
| SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
| if (unit_pending_active(other)) |
| return; |
| |
| log_info("Service %s is not needed anymore. Stopping.", u->id); |
| |
| /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ |
| manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
| } |
| |
| static void retroactively_start_dependencies(Unit *u) { |
| Iterator i; |
| Unit *other; |
| |
| assert(u); |
| assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
| if (!set_get(u->dependencies[UNIT_AFTER], other) && |
| !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_BIND_TO], i) |
| if (!set_get(u->dependencies[UNIT_AFTER], other) && |
| !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
| if (!set_get(u->dependencies[UNIT_AFTER], other) && |
| !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
| if (!set_get(u->dependencies[UNIT_AFTER], other) && |
| !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
| if (!set_get(u->dependencies[UNIT_AFTER], other) && |
| !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
| } |
| |
| static void retroactively_stop_dependencies(Unit *u) { |
| Iterator i; |
| Unit *other; |
| |
| assert(u); |
| assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); |
| |
| /* Pull down units which are bound to us recursively if enabled */ |
| SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
| } |
| |
| static void check_unneeded_dependencies(Unit *u) { |
| Iterator i; |
| Unit *other; |
| |
| assert(u); |
| assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); |
| |
| /* Garbage collect services that might not be needed anymore, if enabled */ |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| unit_check_unneeded(other); |
| SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| unit_check_unneeded(other); |
| SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| unit_check_unneeded(other); |
| SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| unit_check_unneeded(other); |
| SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| unit_check_unneeded(other); |
| SET_FOREACH(other, u->dependencies[UNIT_BIND_TO], i) |
| if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
| unit_check_unneeded(other); |
| } |
| |
| void unit_trigger_on_failure(Unit *u) { |
| Unit *other; |
| Iterator i; |
| |
| assert(u); |
| |
| if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
| return; |
| |
| log_info("Triggering OnFailure= dependencies of %s.", u->id); |
| |
| SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
| int r; |
| |
| if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0) |
| log_error("Failed to enqueue OnFailure= job: %s", strerror(-r)); |
| } |
| } |
| |
| void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
| bool unexpected; |
| |
| assert(u); |
| assert(os < _UNIT_ACTIVE_STATE_MAX); |
| assert(ns < _UNIT_ACTIVE_STATE_MAX); |
| |
| /* Note that this is called for all low-level state changes, |
| * even if they might map to the same high-level |
| * UnitActiveState! That means that ns == os is OK an expected |
| * behaviour here. For example: if a mount point is remounted |
| * this function will be called too! */ |
| |
| if (u->manager->n_reloading <= 0) { |
| dual_timestamp ts; |
| |
| dual_timestamp_get(&ts); |
| |
| if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
| u->inactive_exit_timestamp = ts; |
| else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
| u->inactive_enter_timestamp = ts; |
| |
| if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
| u->active_enter_timestamp = ts; |
| else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
| u->active_exit_timestamp = ts; |
| |
| timer_unit_notify(u, ns); |
| path_unit_notify(u, ns); |
| } |
| |
| if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
| cgroup_bonding_trim_list(u->cgroup_bondings, true); |
| |
| if (u->job) { |
| unexpected = false; |
| |
| if (u->job->state == JOB_WAITING) |
| |
| /* So we reached a different state for this |
| * job. Let's see if we can run it now if it |
| * failed previously due to EAGAIN. */ |
| job_add_to_run_queue(u->job); |
| |
| /* Let's check whether this state change constitutes a |
| * finished job, or maybe contradicts a running job and |
| * hence needs to invalidate jobs. */ |
| |
| switch (u->job->type) { |
| |
| case JOB_START: |
| case JOB_VERIFY_ACTIVE: |
| |
| if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
| job_finish_and_invalidate(u->job, JOB_DONE); |
| else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
| unexpected = true; |
| |
| if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
| job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
| } |
| |
| break; |
| |
| case JOB_RELOAD: |
| case JOB_RELOAD_OR_START: |
| |
| if (u->job->state == JOB_RUNNING) { |
| if (ns == UNIT_ACTIVE) |
| job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED); |
| else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
| unexpected = true; |
| |
| if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
| job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
| } |
| } |
| |
| break; |
| |
| case JOB_STOP: |
| case JOB_RESTART: |
| case JOB_TRY_RESTART: |
| |
| if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
| job_finish_and_invalidate(u->job, JOB_DONE); |
| else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
| unexpected = true; |
| job_finish_and_invalidate(u->job, JOB_FAILED); |
| } |
| |
| break; |
| |
| default: |
| assert_not_reached("Job type unknown"); |
| } |
| |
| } else |
| unexpected = true; |
| |
| if (u->manager->n_reloading <= 0) { |
| |
| /* If this state change happened without being |
| * requested by a job, then let's retroactively start |
| * or stop dependencies. We skip that step when |
| * deserializing, since we don't want to create any |
| * additional jobs just because something is already |
| * activated. */ |
| |
| if (unexpected) { |
| if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) |
| retroactively_start_dependencies(u); |
| else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
| retroactively_stop_dependencies(u); |
| } |
| |
| /* stop unneeded units regardless if going down was expected or not */ |
| if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
| check_unneeded_dependencies(u); |
| |
| if (ns != os && ns == UNIT_FAILED) { |
| log_notice("Unit %s entered failed state.", u->id); |
| unit_trigger_on_failure(u); |
| } |
| } |
| |
| /* Some names are special */ |
| if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { |
| |
| if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) |
| /* The bus just might have become available, |
| * hence try to connect to it, if we aren't |
| * yet connected. */ |
| bus_init(u->manager, true); |
| |
| if (u->type == UNIT_SERVICE && |
| !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
| u->manager->n_reloading <= 0) { |
| /* Write audit record if we have just finished starting up */ |
| manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); |
| u->in_audit = true; |
| } |
| |
| if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
| manager_send_unit_plymouth(u->manager, u); |
| |
| } else { |
| |
| /* We don't care about D-Bus here, since we'll get an |
| * asynchronous notification for it anyway. */ |
| |
| if (u->type == UNIT_SERVICE && |
| UNIT_IS_INACTIVE_OR_FAILED(ns) && |
| !UNIT_IS_INACTIVE_OR_FAILED(os) && |
| u->manager->n_reloading <= 0) { |
| |
| /* Hmm, if there was no start record written |
| * write it now, so that we always have a nice |
| * pair */ |
| if (!u->in_audit) { |
| manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
| |
| if (ns == UNIT_INACTIVE) |
| manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); |
| } else |
| /* Write audit record if we have just finished shutting down */ |
| manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
| |
| u->in_audit = false; |
| } |
| } |
| |
| manager_recheck_journal(u->manager); |
| |
| /* Maybe we finished startup and are now ready for being |
| * stopped because unneeded? */ |
| unit_check_unneeded(u); |
| |
| unit_add_to_dbus_queue(u); |
| unit_add_to_gc_queue(u); |
| } |
| |
| int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
| struct epoll_event ev; |
| |
| assert(u); |
| assert(fd >= 0); |
| assert(w); |
| assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
| |
| zero(ev); |
| ev.data.ptr = w; |
| ev.events = events; |
| |
| if (epoll_ctl(u->manager->epoll_fd, |
| w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, |
| fd, |
| &ev) < 0) |
| return -errno; |
| |
| w->fd = fd; |
| w->type = WATCH_FD; |
| w->data.unit = u; |
| |
| return 0; |
| } |
| |
| void unit_unwatch_fd(Unit *u, Watch *w) { |
| assert(u); |
| assert(w); |
| |
| if (w->type == WATCH_INVALID) |
| return; |
| |
| assert(w->type == WATCH_FD); |
| assert(w->data.unit == u); |
| assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
| |
| w->fd = -1; |
| w->type = WATCH_INVALID; |
| w->data.unit = NULL; |
| } |
| |
| int unit_watch_pid(Unit *u, pid_t pid) { |
| assert(u); |
| assert(pid >= 1); |
| |
| /* Watch a specific PID. We only support one unit watching |
| * each PID for now. */ |
| |
| return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
| } |
| |
| void unit_unwatch_pid(Unit *u, pid_t pid) { |
| assert(u); |
| assert(pid >= 1); |
| |
| hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
| } |
| |
| int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
| struct itimerspec its; |
| int flags, fd; |
| bool ours; |
| |
| assert(u); |
| assert(w); |
| assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
| |
| /* This will try to reuse the old timer if there is one */ |
| |
| if (w->type == WATCH_UNIT_TIMER) { |
| assert(w->data.unit == u); |
| assert(w->fd >= 0); |
| |
| ours = false; |
| fd = w->fd; |
| } else if (w->type == WATCH_INVALID) { |
| |
| ours = true; |
| if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
| return -errno; |
| } else |
| assert_not_reached("Invalid watch type"); |
| |
| zero(its); |
| |
| if (delay <= 0) { |
| /* Set absolute time in the past, but not 0, since we |
| * don't want to disarm the timer */ |
| its.it_value.tv_sec = 0; |
| its.it_value.tv_nsec = 1; |
| |
| flags = TFD_TIMER_ABSTIME; |
| } else { |
| timespec_store(&its.it_value, delay); |
| flags = 0; |
| } |
| |
| /* This will also flush the elapse counter */ |
| if (timerfd_settime(fd, flags, &its, NULL) < 0) |
| goto fail; |
| |
| if (w->type == WATCH_INVALID) { |
| struct epoll_event ev; |
| |
| zero(ev); |
| ev.data.ptr = w; |
| ev.events = EPOLLIN; |
| |
| if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) |
| goto fail; |
| } |
| |
| w->type = WATCH_UNIT_TIMER; |
| w->fd = fd; |
| w->data.unit = u; |
| |
| return 0; |
| |
| fail: |
| if (ours) |
| close_nointr_nofail(fd); |
| |
| return -errno; |
| } |
| |
| void unit_unwatch_timer(Unit *u, Watch *w) { |
| assert(u); |
| assert(w); |
| |
| if (w->type == WATCH_INVALID) |
| return; |
| |
| assert(w->type == WATCH_UNIT_TIMER); |
| assert(w->data.unit == u); |
| assert(w->fd >= 0); |
| |
| assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
| close_nointr_nofail(w->fd); |
| |
| w->fd = -1; |
| w->type = WATCH_INVALID; |
| w->data.unit = NULL; |
| } |
| |
| bool unit_job_is_applicable(Unit *u, JobType j) { |
| assert(u); |
| assert(j >= 0 && j < _JOB_TYPE_MAX); |
| |
| switch (j) { |
| |
| case JOB_VERIFY_ACTIVE: |
| case JOB_START: |
| case JOB_STOP: |
| return true; |
| |
| case JOB_RESTART: |
| case JOB_TRY_RESTART: |
| return unit_can_start(u); |
| |
| case JOB_RELOAD: |
| return unit_can_reload(u); |
| |
| case JOB_RELOAD_OR_START: |
| return unit_can_reload(u) && unit_can_start(u); |
| |
| default: |
| assert_not_reached("Invalid job type"); |
| } |
| } |
| |
| int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
| |
| static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { |
| [UNIT_REQUIRES] = UNIT_REQUIRED_BY, |
| [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
| [UNIT_WANTS] = UNIT_WANTED_BY, |
| [UNIT_REQUISITE] = UNIT_REQUIRED_BY, |
| [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
| [UNIT_BIND_TO] = UNIT_BOUND_BY, |
| [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
| [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
| [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
| [UNIT_BOUND_BY] = UNIT_BIND_TO, |
| [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
| [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, |
| [UNIT_BEFORE] = UNIT_AFTER, |
| [UNIT_AFTER] = UNIT_BEFORE, |
| [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
| [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
| [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
| [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, |
| [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
| [UNIT_PROPAGATE_RELOAD_TO] = UNIT_PROPAGATE_RELOAD_FROM, |
| [UNIT_PROPAGATE_RELOAD_FROM] = UNIT_PROPAGATE_RELOAD_TO |
| }; |
| int r, q = 0, v = 0, w = 0; |
| |
| assert(u); |
| assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); |
| assert(other); |
| |
| u = unit_follow_merge(u); |
| other = unit_follow_merge(other); |
| |
| /* We won't allow dependencies on ourselves. We will not |
| * consider them an error however. */ |
| if (u == other) |
| return 0; |
| |
| if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
| return r; |
| |
| if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
| if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) |
| return r; |
| |
| if (add_reference) |
| if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || |
| (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) |
| return r; |
| |
| if ((q = set_put(u->dependencies[d], other)) < 0) |
| return q; |
| |
| if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
| if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) { |
| r = v; |
| goto fail; |
| } |
| |
| if (add_reference) { |
| if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) { |
| r = w; |
| goto fail; |
| } |
| |
| if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0) |
| goto fail; |
| } |
| |
| unit_add_to_dbus_queue(u); |
| return 0; |
| |
| fail: |
| if (q > 0) |
| set_remove(u->dependencies[d], other); |
| |
| if (v > 0) |
| set_remove(other->dependencies[inverse_table[d]], u); |
| |
| if (w > 0) |
| set_remove(u->dependencies[UNIT_REFERENCES], other); |
| |
| return r; |
| } |
| |
| int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
| int r; |
| |
| assert(u); |
| |
| if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) |
| return r; |
| |
| if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
| char *s; |
| |
| assert(u); |
| assert(name || path); |
| |
| if (!name) |
| name = file_name_from_path(path); |
| |
| if (!unit_name_is_template(name)) { |
| *p = NULL; |
| return name; |
| } |
| |
| if (u->instance) |
| s = unit_name_replace_instance(name, u->instance); |
| else { |
| char *i; |
| |
| if (!(i = unit_name_to_prefix(u->id))) |
| return NULL; |
| |
| s = unit_name_replace_instance(name, i); |
| free(i); |
| } |
| |
| if (!s) |
| return NULL; |
| |
| *p = s; |
| return s; |
| } |
| |
| int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
| Unit *other; |
| int r; |
| char *s; |
| |
| assert(u); |
| assert(name || path); |
| |
| if (!(name = resolve_template(u, name, path, &s))) |
| return -ENOMEM; |
| |
| if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
| goto finish; |
| |
| r = unit_add_dependency(u, d, other, add_reference); |
| |
| finish: |
| free(s); |
| return r; |
| } |
| |
| int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
| Unit *other; |
| int r; |
| char *s; |
| |
| assert(u); |
| assert(name || path); |
| |
| if (!(name = resolve_template(u, name, path, &s))) |
| return -ENOMEM; |
| |
| if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
| goto finish; |
| |
| r = unit_add_two_dependencies(u, d, e, other, add_reference); |
| |
| finish: |
| free(s); |
| return r; |
| } |
| |
| int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
| Unit *other; |
| int r; |
| char *s; |
| |
| assert(u); |
| assert(name || path); |
| |
| if (!(name = resolve_template(u, name, path, &s))) |
| return -ENOMEM; |
| |
| if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
| goto finish; |
| |
| r = unit_add_dependency(other, d, u, add_reference); |
| |
| finish: |
| free(s); |
| return r; |
| } |
| |
| int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
| Unit *other; |
| int r; |
| char *s; |
| |
| assert(u); |
| assert(name || path); |
| |
| if (!(name = resolve_template(u, name, path, &s))) |
| return -ENOMEM; |
| |
| if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
| goto finish; |
| |
| if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) |
| goto finish; |
| |
| finish: |
| free(s); |
| return r; |
| } |
| |
| int set_unit_path(const char *p) { |
| char *cwd, *c; |
| int r; |
| |
| /* This is mostly for debug purposes */ |
| |
| if (path_is_absolute(p)) { |
| if (!(c = strdup(p))) |
| return -ENOMEM; |
| } else { |
| if (!(cwd = get_current_dir_name())) |
| return -errno; |
| |
| r = asprintf(&c, "%s/%s", cwd, p); |
| free(cwd); |
| |
| if (r < 0) |
| return -ENOMEM; |
| } |
| |
| if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
| r = -errno; |
| free(c); |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| char *unit_dbus_path(Unit *u) { |
| char *p, *e; |
| |
| assert(u); |
| |
| if (!u->id) |
| return NULL; |
| |
| if (!(e = bus_path_escape(u->id))) |
| return NULL; |
| |
| p = strappend("/org/freedesktop/systemd1/unit/", e); |
| free(e); |
| |
| return p; |
| } |
| |
| int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
| int r; |
| |
| assert(u); |
| assert(b); |
| |
| assert(b->path); |
| |
| if (!b->controller) { |
| if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) |
| return -ENOMEM; |
| |
| b->ours = true; |
| } |
| |
| /* Ensure this hasn't been added yet */ |
| assert(!b->unit); |
| |
| if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
| CGroupBonding *l; |
| |
| l = hashmap_get(u->manager->cgroup_bondings, b->path); |
| LIST_PREPEND(CGroupBonding, by_path, l, b); |
| |
| if ((r = hashmap_replace(u->manager->cgroup_bondings, b->path, l)) < 0) { |
| LIST_REMOVE(CGroupBonding, by_path, l, b); |
| return r; |
| } |
| } |
| |
| LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b); |
| b->unit = u; |
| |
| return 0; |
| } |
| |
| static char *default_cgroup_path(Unit *u) { |
| char *p; |
| |
| assert(u); |
| |
| if (u->instance) { |
| char *t; |
| |
| t = unit_name_template(u->id); |
| if (!t) |
| return NULL; |
| |
| p = join(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL); |
| free(t); |
| } else |
| p = join(u->manager->cgroup_hierarchy, "/", u->id, NULL); |
| |
| return p; |
| } |
| |
| int unit_add_cgroup_from_text(Unit *u, const char *name) { |
| char *controller = NULL, *path = NULL; |
| CGroupBonding *b = NULL; |
| bool ours = false; |
| int r; |
| |
| assert(u); |
| assert(name); |
| |
| if ((r = cg_split_spec(name, &controller, &path)) < 0) |
| return r; |
| |
| if (!path) { |
| path = default_cgroup_path(u); |
| ours = true; |
| } |
| |
| if (!controller) { |
| controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
| ours = true; |
| } |
| |
| if (!path || !controller) { |
| free(path); |
| free(controller); |
| |
| return -ENOMEM; |
| } |
| |
| if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) { |
| r = -EEXIST; |
| goto fail; |
| } |
| |
| if (!(b = new0(CGroupBonding, 1))) { |
| r = -ENOMEM; |
| goto fail; |
| } |
| |
| b->controller = controller; |
| b->path = path; |
| b->ours = ours; |
| b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); |
| |
| if ((r = unit_add_cgroup(u, b)) < 0) |
| goto fail; |
| |
| return 0; |
| |
| fail: |
| free(path); |
| free(controller); |
| free(b); |
| |
| return r; |
| } |
| |
| static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
| CGroupBonding *b = NULL; |
| int r = -ENOMEM; |
| |
| assert(u); |
| |
| if (!controller) |
| controller = SYSTEMD_CGROUP_CONTROLLER; |
| |
| if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) |
| return 0; |
| |
| if (!(b = new0(CGroupBonding, 1))) |
| return -ENOMEM; |
| |
| if (!(b->controller = strdup(controller))) |
| goto fail; |
| |
| if (!(b->path = default_cgroup_path(u))) |
| goto fail; |
| |
| b->ours = true; |
| b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); |
| |
| if ((r = unit_add_cgroup(u, b)) < 0) |
| goto fail; |
| |
| return 0; |
| |
| fail: |
| free(b->path); |
| free(b->controller); |
| free(b); |
| |
| return r; |
| } |
| |
| int unit_add_default_cgroups(Unit *u) { |
| CGroupAttribute *a; |
| char **c; |
| int r; |
| |
| assert(u); |
| |
| /* Adds in the default cgroups, if they weren't specified |
| * otherwise. */ |
| |
| if (!u->manager->cgroup_hierarchy) |
| return 0; |
| |
| if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) |
| return r; |
| |
| STRV_FOREACH(c, u->manager->default_controllers) |
| unit_add_one_default_cgroup(u, *c); |
| |
| LIST_FOREACH(by_unit, a, u->cgroup_attributes) |
| unit_add_one_default_cgroup(u, a->controller); |
| |
| return 0; |
| } |
| |
| CGroupBonding* unit_get_default_cgroup(Unit *u) { |
| assert(u); |
| |
| return cgroup_bonding_find_list(u->cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
| } |
| |
| int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback) { |
| int r; |
| char *c = NULL; |
| CGroupAttribute *a; |
| |
| assert(u); |
| assert(name); |
| assert(value); |
| |
| if (!controller) { |
| const char *dot; |
| |
| dot = strchr(name, '.'); |
| if (!dot) |
| return -EINVAL; |
| |
| c = strndup(name, dot - name); |
| if (!c) |
| return -ENOMEM; |
| |
| controller = c; |
| } |
| |
| if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) { |
| r = -EINVAL; |
| goto finish; |
| } |
| |
| a = new0(CGroupAttribute, 1); |
| if (!a) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| if (c) { |
| a->controller = c; |
| c = NULL; |
| } else |
| a->controller = strdup(controller); |
| |
| a->name = strdup(name); |
| a->value = strdup(value); |
| |
| if (!a->controller || !a->name || !a->value) { |
| free(a->controller); |
| free(a->name); |
| free(a->value); |
| free(a); |
| |
| return -ENOMEM; |
| } |
| |
| a->map_callback = map_callback; |
| |
| LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a); |
| |
| r = 0; |
| |
| finish: |
| free(c); |
| return r; |
| } |
| |
| int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
| char *t; |
| int r; |
| |
| assert(u); |
| assert(type); |
| assert(_found); |
| |
| if (!(t = unit_name_change_suffix(u->id, type))) |
| return -ENOMEM; |
| |
| assert(!unit_has_name(u, t)); |
| |
| r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
| free(t); |
| |
| assert(r < 0 || *_found != u); |
| |
| return r; |
| } |
| |
| int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
| Unit *found; |
| char *t; |
| |
| assert(u); |
| assert(type); |
| assert(_found); |
| |
| if (!(t = unit_name_change_suffix(u->id, type))) |
| return -ENOMEM; |
| |
| assert(!unit_has_name(u, t)); |
| |
| found = manager_get_unit(u->manager, t); |
| free(t); |
| |
| if (!found) |
| return -ENOENT; |
| |
| *_found = found; |
| return 0; |
| } |
| |
| static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| assert(u); |
| |
| return unit_name_to_prefix_and_instance(u->id); |
| } |
| |
| static char *specifier_prefix(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| assert(u); |
| |
| return unit_name_to_prefix(u->id); |
| } |
| |
| static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| char *p, *r; |
| |
| assert(u); |
| |
| if (!(p = unit_name_to_prefix(u->id))) |
| return NULL; |
| |
| r = unit_name_unescape(p); |
| free(p); |
| |
| return r; |
| } |
| |
| static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| assert(u); |
| |
| if (u->instance) |
| return unit_name_unescape(u->instance); |
| |
| return strdup(""); |
| } |
| |
| static char *specifier_filename(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| assert(u); |
| |
| if (u->instance) |
| return unit_name_path_unescape(u->instance); |
| |
| return unit_name_to_path(u->instance); |
| } |
| |
| static char *specifier_cgroup(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| assert(u); |
| |
| return default_cgroup_path(u); |
| } |
| |
| static char *specifier_cgroup_root(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| char *p; |
| assert(u); |
| |
| if (specifier == 'r') |
| return strdup(u->manager->cgroup_hierarchy); |
| |
| if (parent_of_path(u->manager->cgroup_hierarchy, &p) < 0) |
| return strdup(""); |
| |
| if (streq(p, "/")) { |
| free(p); |
| return strdup(""); |
| } |
| |
| return p; |
| } |
| |
| static char *specifier_runtime(char specifier, void *data, void *userdata) { |
| Unit *u = userdata; |
| assert(u); |
| |
| if (u->manager->running_as == MANAGER_USER) { |
| const char *e; |
| |
| e = getenv("XDG_RUNTIME_DIR"); |
| if (e) |
| return strdup(e); |
| } |
| |
| return strdup("/run"); |
| } |
| |
| char *unit_name_printf(Unit *u, const char* format) { |
| |
| /* |
| * This will use the passed string as format string and |
| * replace the following specifiers: |
| * |
| * %n: the full id of the unit (foo@bar.waldo) |
| * %N: the id of the unit without the suffix (foo@bar) |
| * %p: the prefix (foo) |
| * %i: the instance (bar) |
| */ |
| |
| const Specifier table[] = { |
| { 'n', specifier_string, u->id }, |
| { 'N', specifier_prefix_and_instance, NULL }, |
| { 'p', specifier_prefix, NULL }, |
| { 'i', specifier_string, u->instance }, |
| { 0, NULL, NULL } |
| }; |
| |
| assert(u); |
| assert(format); |
| |
| return specifier_printf(format, table, u); |
| } |
| |
| char *unit_full_printf(Unit *u, const char *format) { |
| |
| /* This is similar to unit_name_printf() but also supports |
| * unescaping. Also, adds a couple of additional codes: |
| * |
| * %c cgroup path of unit |
| * %r root cgroup path of this systemd instance (e.g. "/user/lennart/shared/systemd-4711") |
| * %R parent of root cgroup path (e.g. "/usr/lennart/shared") |
| * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR) |
| */ |
| |
| const Specifier table[] = { |
| { 'n', specifier_string, u->id }, |
| { 'N', specifier_prefix_and_instance, NULL }, |
| { 'p', specifier_prefix, NULL }, |
| { 'P', specifier_prefix_unescaped, NULL }, |
| { 'i', specifier_string, u->instance }, |
| { 'I', specifier_instance_unescaped, NULL }, |
| { 'f', specifier_filename, NULL }, |
| { 'c', specifier_cgroup, NULL }, |
| { 'r', specifier_cgroup_root, NULL }, |
| { 'R', specifier_cgroup_root, NULL }, |
| { 't', specifier_runtime, NULL }, |
| { 0, NULL, NULL } |
| }; |
| |
| assert(u); |
| assert(format); |
| |
| return specifier_printf(format, table, u); |
| } |
| |
| char **unit_full_printf_strv(Unit *u, char **l) { |
| size_t n; |
| char **r, **i, **j; |
| |
| /* Applies unit_full_printf to every entry in l */ |
| |
| assert(u); |
| |
| n = strv_length(l); |
| if (!(r = new(char*, n+1))) |
| return NULL; |
| |
| for (i = l, j = r; *i; i++, j++) |
| if (!(*j = unit_full_printf(u, *i))) |
| goto fail; |
| |
| *j = NULL; |
| return r; |
| |
| fail: |
| for (j--; j >= r; j--) |
| free(*j); |
| |
| free(r); |
| |
| return NULL; |
| } |
| |
| int unit_watch_bus_name(Unit *u, const char *name) { |
| assert(u); |
| assert(name); |
| |
| /* Watch a specific name on the bus. We only support one unit |
| * watching each name for now. */ |
| |
| return hashmap_put(u->manager->watch_bus, name, u); |
| } |
| |
| void unit_unwatch_bus_name(Unit *u, const char *name) { |
| assert(u); |
| assert(name); |
| |
| hashmap_remove_value(u->manager->watch_bus, name, u); |
| } |
| |
| bool unit_can_serialize(Unit *u) { |
| assert(u); |
| |
| return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; |
| } |
| |
| int unit_serialize(Unit *u, FILE *f, FDSet *fds) { |
| int r; |
| |
| assert(u); |
| assert(f); |
| assert(fds); |
| |
| if (!unit_can_serialize(u)) |
| return 0; |
| |
| if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) |
| return r; |
| |
| if (u->job) |
| unit_serialize_item(u, f, "job", job_type_to_string(u->job->type)); |
| |
| dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
| dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); |
| dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); |
| dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); |
| dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
| |
| if (dual_timestamp_is_set(&u->condition_timestamp)) |
| unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); |
| |
| /* End marker */ |
| fputc('\n', f); |
| return 0; |
| } |
| |
| void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
| va_list ap; |
| |
| assert(u); |
| assert(f); |
| assert(key); |
| assert(format); |
| |
| fputs(key, f); |
| fputc('=', f); |
| |
| va_start(ap, format); |
| vfprintf(f, format, ap); |
| va_end(ap); |
| |
| fputc('\n', f); |
| } |
| |
| void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
| assert(u); |
| assert(f); |
| assert(key); |
| assert(value); |
| |
| fprintf(f, "%s=%s\n", key, value); |
| } |
| |
| int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
| int r; |
| |
| assert(u); |
| assert(f); |
| assert(fds); |
| |
| if (!unit_can_serialize(u)) |
| return 0; |
| |
| for (;;) { |
| char line[LINE_MAX], *l, *v; |
| size_t k; |
| |
| if (!fgets(line, sizeof(line), f)) { |
| if (feof(f)) |
| return 0; |
| return -errno; |
| } |
| |
| char_array_0(line); |
| l = strstrip(line); |
| |
| /* End marker */ |
| if (l[0] == 0) |
| return 0; |
| |
| k = strcspn(l, "="); |
| |
| if (l[k] == '=') { |
| l[k] = 0; |
| v = l+k+1; |
| } else |
| v = l+k; |
| |
| if (streq(l, "job")) { |
| JobType type; |
| |
| if ((type = job_type_from_string(v)) < 0) |
| log_debug("Failed to parse job type value %s", v); |
| else |
| u->deserialized_job = type; |
| |
| continue; |
| } else if (streq(l, "inactive-exit-timestamp")) { |
| dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
| continue; |
| } else if (streq(l, "active-enter-timestamp")) { |
| dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
| continue; |
| } else if (streq(l, "active-exit-timestamp")) { |
| dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
| continue; |
| } else if (streq(l, "inactive-enter-timestamp")) { |
| dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
| continue; |
| } else if (streq(l, "condition-timestamp")) { |
| dual_timestamp_deserialize(v, &u->condition_timestamp); |
| continue; |
| } else if (streq(l, "condition-result")) { |
| int b; |
| |
| if ((b = parse_boolean(v)) < 0) |
| log_debug("Failed to parse condition result value %s", v); |
| else |
| u->condition_result = b; |
| |
| continue; |
| } |
| |
| if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
| return r; |
| } |
| } |
| |
| int unit_add_node_link(Unit *u, const char *what, bool wants) { |
| Unit *device; |
| char *e; |
| int r; |
| |
| assert(u); |
| |
| if (!what) |
| return 0; |
| |
| /* Adds in links to the device node that this unit is based on */ |
| |
| if (!is_device_path(what)) |
| return 0; |
| |
| if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) |
| return -ENOMEM; |
| |
| r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
| free(e); |
| |
| if (r < 0) |
| return r; |
| |
| if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0) |
| return r; |
| |
| if (wants) |
| if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| int unit_coldplug(Unit *u) { |
| int r; |
| |
| assert(u); |
| |
| if (UNIT_VTABLE(u)->coldplug) |
| if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) |
| return r; |
| |
| if (u->deserialized_job >= 0) { |
| if ((r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL)) < 0) |
| return r; |
| |
| u->deserialized_job = _JOB_TYPE_INVALID; |
| } |
| |
| return 0; |
| } |
| |
| void unit_status_printf(Unit *u, const char *status, const char *format, ...) { |
| va_list ap; |
| |
| assert(u); |
| assert(format); |
| |
| if (!UNIT_VTABLE(u)->show_status) |
| return; |
| |
| if (!manager_get_show_status(u->manager)) |
| return; |
| |
| if (!manager_is_booting_or_shutting_down(u->manager)) |
| return; |
| |
| va_start(ap, format); |
| status_vprintf(status, true, format, ap); |
| va_end(ap); |
| } |
| |
| bool unit_need_daemon_reload(Unit *u) { |
| assert(u); |
| |
| if (u->fragment_path) { |
| struct stat st; |
| |
| zero(st); |
| if (stat(u->fragment_path, &st) < 0) |
| /* What, cannot access this anymore? */ |
| return true; |
| |
| if (u->fragment_mtime > 0 && |
| timespec_load(&st.st_mtim) != u->fragment_mtime) |
| return true; |
| } |
| |
| if (UNIT_VTABLE(u)->need_daemon_reload) |
| return UNIT_VTABLE(u)->need_daemon_reload(u); |
| |
| return false; |
| } |
| |
| void unit_reset_failed(Unit *u) { |
| assert(u); |
| |
| if (UNIT_VTABLE(u)->reset_failed) |
| UNIT_VTABLE(u)->reset_failed(u); |
| } |
| |
| Unit *unit_following(Unit *u) { |
| assert(u); |
| |
| if (UNIT_VTABLE(u)->following) |
| return UNIT_VTABLE(u)->following(u); |
| |
| return NULL; |
| } |
| |
| bool unit_pending_inactive(Unit *u) { |
| assert(u); |
| |
| /* Returns true if the unit is inactive or going down */ |
| |
| if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
| return true; |
| |
| if (u->job && u->job->type == JOB_STOP) |
| return true; |
| |
| return false; |
| } |
| |
| bool unit_pending_active(Unit *u) { |
| assert(u); |
| |
| /* Returns true if the unit is active or going up */ |
| |
| if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) |
| return true; |
| |
| if (u->job && |
| (u->job->type == JOB_START || |
| u->job->type == JOB_RELOAD_OR_START || |
| u->job->type == JOB_RESTART)) |
| return true; |
| |
| return false; |
| } |
| |
| UnitType unit_name_to_type(const char *n) { |
| UnitType t; |
| |
| assert(n); |
| |
| for (t = 0; t < _UNIT_TYPE_MAX; t++) |
| if (endswith(n, unit_vtable[t]->suffix)) |
| return t; |
| |
| return _UNIT_TYPE_INVALID; |
| } |
| |
| bool unit_name_is_valid(const char *n, bool template_ok) { |
| UnitType t; |
| |
| t = unit_name_to_type(n); |
| if (t < 0 || t >= _UNIT_TYPE_MAX) |
| return false; |
| |
| return unit_name_is_valid_no_type(n, template_ok); |
| } |
| |
| int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) { |
| assert(u); |
| assert(w >= 0 && w < _KILL_WHO_MAX); |
| assert(m >= 0 && m < _KILL_MODE_MAX); |
| assert(signo > 0); |
| assert(signo < _NSIG); |
| |
| if (m == KILL_NONE) |
| return 0; |
| |
| if (!UNIT_VTABLE(u)->kill) |
| return -ENOTSUP; |
| |
| return UNIT_VTABLE(u)->kill(u, w, m, signo, error); |
| } |
| |
| int unit_following_set(Unit *u, Set **s) { |
| assert(u); |
| assert(s); |
| |
| if (UNIT_VTABLE(u)->following_set) |
| return UNIT_VTABLE(u)->following_set(u, s); |
| |
| *s = NULL; |
| return 0; |
| } |
| |
| UnitFileState unit_get_unit_file_state(Unit *u) { |
| assert(u); |
| |
| if (u->unit_file_state < 0 && u->fragment_path) |
| u->unit_file_state = unit_file_get_state( |
| u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
| NULL, file_name_from_path(u->fragment_path)); |
| |
| return u->unit_file_state; |
| } |
| |
| Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
| assert(ref); |
| assert(u); |
| |
| if (ref->unit) |
| unit_ref_unset(ref); |
| |
| ref->unit = u; |
| LIST_PREPEND(UnitRef, refs, u->refs, ref); |
| return u; |
| } |
| |
| void unit_ref_unset(UnitRef *ref) { |
| assert(ref); |
| |
| if (!ref->unit) |
| return; |
| |
| LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref); |
| ref->unit = NULL; |
| } |
| |
| static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { |
| [UNIT_STUB] = "stub", |
| [UNIT_LOADED] = "loaded", |
| [UNIT_ERROR] = "error", |
| [UNIT_MERGED] = "merged", |
| [UNIT_MASKED] = "masked" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); |
| |
| static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
| [UNIT_ACTIVE] = "active", |
| [UNIT_RELOADING] = "reloading", |
| [UNIT_INACTIVE] = "inactive", |
| [UNIT_FAILED] = "failed", |
| [UNIT_ACTIVATING] = "activating", |
| [UNIT_DEACTIVATING] = "deactivating" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |
| |
| static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { |
| [UNIT_REQUIRES] = "Requires", |
| [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
| [UNIT_WANTS] = "Wants", |
| [UNIT_REQUISITE] = "Requisite", |
| [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
| [UNIT_REQUIRED_BY] = "RequiredBy", |
| [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
| [UNIT_BIND_TO] = "BindTo", |
| [UNIT_WANTED_BY] = "WantedBy", |
| [UNIT_CONFLICTS] = "Conflicts", |
| [UNIT_CONFLICTED_BY] = "ConflictedBy", |
| [UNIT_BOUND_BY] = "BoundBy", |
| [UNIT_BEFORE] = "Before", |
| [UNIT_AFTER] = "After", |
| [UNIT_REFERENCES] = "References", |
| [UNIT_REFERENCED_BY] = "ReferencedBy", |
| [UNIT_ON_FAILURE] = "OnFailure", |
| [UNIT_TRIGGERS] = "Triggers", |
| [UNIT_TRIGGERED_BY] = "TriggeredBy", |
| [UNIT_PROPAGATE_RELOAD_TO] = "PropagateReloadTo", |
| [UNIT_PROPAGATE_RELOAD_FROM] = "PropagateReloadFrom" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |