+++ /dev/null
-/*-*- 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 Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/stat.h>
-
-#include "sd-id128.h"
-#include "sd-messages.h"
-#include "set.h"
-#include "unit.h"
-#include "macro.h"
-#include "strv.h"
-#include "path-util.h"
-#include "load-fragment.h"
-#include "load-dropin.h"
-#include "log.h"
-#include "unit-name.h"
-#include "dbus-unit.h"
-#include "special.h"
-#include "cgroup-util.h"
-#include "missing.h"
-#include "mkdir.h"
-#include "fileio-label.h"
-#include "bus-common-errors.h"
-#include "dbus.h"
-#include "execute.h"
-#include "dropin.h"
-
-const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = {
- [UNIT_SERVICE] = &service_vtable,
- [UNIT_SOCKET] = &socket_vtable,
- [UNIT_BUSNAME] = &busname_vtable,
- [UNIT_TARGET] = &target_vtable,
- [UNIT_SNAPSHOT] = &snapshot_vtable,
- [UNIT_DEVICE] = &device_vtable,
- [UNIT_MOUNT] = &mount_vtable,
- [UNIT_AUTOMOUNT] = &automount_vtable,
- [UNIT_SWAP] = &swap_vtable,
- [UNIT_TIMER] = &timer_vtable,
- [UNIT_PATH] = &path_vtable,
- [UNIT_SLICE] = &slice_vtable,
- [UNIT_SCOPE] = &scope_vtable
-};
-
-static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency);
-
-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_ops);
- 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;
- u->unit_file_preset = -1;
- u->on_failure_job_mode = JOB_REPLACE;
-
- return u;
-}
-
-bool unit_has_name(Unit *u, const char *name) {
- assert(u);
- assert(name);
-
- return !!set_get(u->names, (char*) name);
-}
-
-static void unit_init(Unit *u) {
- CGroupContext *cc;
- ExecContext *ec;
- KillContext *kc;
-
- assert(u);
- assert(u->manager);
- assert(u->type >= 0);
-
- cc = unit_get_cgroup_context(u);
- if (cc) {
- cgroup_context_init(cc);
-
- /* Copy in the manager defaults into the cgroup
- * context, _before_ the rest of the settings have
- * been initialized */
-
- cc->cpu_accounting = u->manager->default_cpu_accounting;
- cc->blockio_accounting = u->manager->default_blockio_accounting;
- cc->memory_accounting = u->manager->default_memory_accounting;
- }
-
- ec = unit_get_exec_context(u);
- if (ec)
- exec_context_init(ec);
-
- kc = unit_get_kill_context(u);
- if (kc)
- kill_context_init(kc);
-
- if (UNIT_VTABLE(u)->init)
- UNIT_VTABLE(u)->init(u);
-}
-
-int unit_add_name(Unit *u, const char *text) {
- _cleanup_free_ char *s = NULL, *i = NULL;
- UnitType t;
- 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, TEMPLATE_INVALID))
- return -EINVAL;
-
- assert_se((t = unit_name_to_type(s)) >= 0);
-
- if (u->type != _UNIT_TYPE_INVALID && t != u->type)
- return -EINVAL;
-
- r = unit_name_to_instance(s, &i);
- if (r < 0)
- return r;
-
- if (i && unit_vtable[t]->no_instances)
- return -EINVAL;
-
- /* Ensure that this unit is either instanced or not instanced,
- * but not both. */
- if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i)
- return -EINVAL;
-
- if (unit_vtable[t]->no_alias &&
- !set_isempty(u->names) &&
- !set_get(u->names, s))
- return -EEXIST;
-
- if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES)
- return -E2BIG;
-
- r = set_put(u->names, s);
- if (r < 0) {
- if (r == -EEXIST)
- return 0;
-
- return r;
- }
-
- r = hashmap_put(u->manager->units, s, u);
- if (r < 0) {
- set_remove(u->names, s);
- return r;
- }
-
- if (u->type == _UNIT_TYPE_INVALID) {
- u->type = t;
- u->id = s;
- u->instance = i;
-
- LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u);
-
- unit_init(u);
-
- i = NULL;
- }
-
- s = NULL;
-
- unit_add_to_dbus_queue(u);
- return 0;
-}
-
-int unit_choose_id(Unit *u, const char *name) {
- _cleanup_free_ char *t = NULL;
- char *s, *i;
- int r;
-
- assert(u);
- assert(name);
-
- if (unit_name_is_template(name)) {
-
- if (!u->instance)
- return -EINVAL;
-
- t = unit_name_replace_instance(name, u->instance);
- if (!t)
- return -ENOMEM;
-
- name = t;
- }
-
- /* Selects one of the names of this unit as the id */
- s = set_get(u->names, (char*) name);
- if (!s)
- return -ENOENT;
-
- r = unit_name_to_instance(s, &i);
- if (r < 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 (isempty(description))
- s = NULL;
- else {
- s = strdup(description);
- if (!s)
- return -ENOMEM;
- }
-
- free(u->description);
- u->description = s;
-
- unit_add_to_dbus_queue(u);
- return 0;
-}
-
-bool unit_check_gc(Unit *u) {
- UnitActiveState state;
- assert(u);
-
- if (u->job)
- return true;
-
- if (u->nop_job)
- return true;
-
- state = unit_active_state(u);
-
- /* If the unit is inactive and failed and no job is queued for
- * it, then release its runtime resources */
- if (UNIT_IS_INACTIVE_OR_FAILED(state) &&
- UNIT_VTABLE(u)->release_resources)
- UNIT_VTABLE(u)->release_resources(u);
-
- /* But we keep the unit object around for longer when it is
- * referenced or configured to not be gc'ed */
- if (state != UNIT_INACTIVE)
- return true;
-
- if (UNIT_VTABLE(u)->no_gc)
- return true;
-
- if (u->no_gc)
- return true;
-
- if (u->refs)
- 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(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(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(gc_queue, u->manager->gc_queue, u);
- u->in_gc_queue = true;
-
- u->manager->n_in_gc_queue ++;
-}
-
-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 (sd_bus_track_count(u->manager->subscribed) <= 0 &&
- set_isempty(u->manager->private_buses)) {
- u->sent_dbus_new_signal = true;
- return;
- }
-
- LIST_PREPEND(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);
-}
-
-static void unit_remove_transient(Unit *u) {
- char **i;
-
- assert(u);
-
- if (!u->transient)
- return;
-
- if (u->fragment_path)
- unlink(u->fragment_path);
-
- STRV_FOREACH(i, u->dropin_paths) {
- _cleanup_free_ char *p = NULL;
- int r;
-
- unlink(*i);
-
- r = path_get_parent(*i, &p);
- if (r >= 0)
- rmdir(p);
- }
-}
-
-static void unit_free_requires_mounts_for(Unit *u) {
- char **j;
-
- STRV_FOREACH(j, u->requires_mounts_for) {
- char s[strlen(*j) + 1];
-
- PATH_FOREACH_PREFIX_MORE(s, *j) {
- char *y;
- Set *x;
-
- x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y);
- if (!x)
- continue;
-
- set_remove(x, u);
-
- if (set_isempty(x)) {
- hashmap_remove(u->manager->units_requiring_mounts_for, y);
- free(y);
- set_free(x);
- }
- }
- }
-
- strv_free(u->requires_mounts_for);
- u->requires_mounts_for = NULL;
-}
-
-static void unit_done(Unit *u) {
- ExecContext *ec;
- CGroupContext *cc;
-
- assert(u);
-
- if (u->type < 0)
- return;
-
- if (UNIT_VTABLE(u)->done)
- UNIT_VTABLE(u)->done(u);
-
- ec = unit_get_exec_context(u);
- if (ec)
- exec_context_done(ec);
-
- cc = unit_get_cgroup_context(u);
- if (cc)
- cgroup_context_done(cc);
-}
-
-void unit_free(Unit *u) {
- UnitDependency d;
- Iterator i;
- char *t;
-
- assert(u);
-
- if (u->manager->n_reloading <= 0)
- unit_remove_transient(u);
-
- bus_unit_send_removed_signal(u);
-
- unit_done(u);
-
- unit_free_requires_mounts_for(u);
-
- SET_FOREACH(t, u->names, i)
- hashmap_remove_value(u->manager->units, t, u);
-
- if (u->job) {
- Job *j = u->job;
- job_uninstall(j);
- job_free(j);
- }
-
- if (u->nop_job) {
- Job *j = u->nop_job;
- job_uninstall(j);
- job_free(j);
- }
-
- for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
- bidi_set_free(u, u->dependencies[d]);
-
- if (u->type != _UNIT_TYPE_INVALID)
- LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u);
-
- if (u->in_load_queue)
- LIST_REMOVE(load_queue, u->manager->load_queue, u);
-
- if (u->in_dbus_queue)
- LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);
-
- if (u->in_cleanup_queue)
- LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u);
-
- if (u->in_gc_queue) {
- LIST_REMOVE(gc_queue, u->manager->gc_queue, u);
- u->manager->n_in_gc_queue--;
- }
-
- if (u->in_cgroup_queue)
- LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u);
-
- if (u->cgroup_path) {
- hashmap_remove(u->manager->cgroup_unit, u->cgroup_path);
- free(u->cgroup_path);
- }
-
- manager_update_failed_units(u->manager, u, false);
- set_remove(u->manager->startup_units, u);
-
- free(u->description);
- strv_free(u->documentation);
- free(u->fragment_path);
- free(u->source_path);
- strv_free(u->dropin_paths);
- free(u->instance);
-
- free(u->job_timeout_reboot_arg);
-
- set_free_free(u->names);
-
- unit_unwatch_all_pids(u);
-
- condition_free_list(u->conditions);
- condition_free_list(u->asserts);
-
- unit_ref_unset(&u->slice);
-
- 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 int complete_move(Set **s, Set **other) {
- int r;
-
- assert(s);
- assert(other);
-
- if (!*other)
- return 0;
-
- if (*s) {
- r = set_move(*s, *other);
- if (r < 0)
- return r;
- } else {
- *s = *other;
- *other = NULL;
- }
-
- return 0;
-}
-
-static int merge_names(Unit *u, Unit *other) {
- char *t;
- Iterator i;
- int r;
-
- assert(u);
- assert(other);
-
- r = complete_move(&u->names, &other->names);
- if (r < 0)
- return r;
-
- 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);
-
- return 0;
-}
-
-static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) {
- unsigned n_reserve;
-
- assert(u);
- assert(other);
- assert(d < _UNIT_DEPENDENCY_MAX);
-
- /*
- * If u does not have this dependency set allocated, there is no need
- * to reserve anything. In that case other's set will be transferred
- * as a whole to u by complete_move().
- */
- if (!u->dependencies[d])
- return 0;
-
- /* merge_dependencies() will skip a u-on-u dependency */
- n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u);
-
- return set_reserve(u->dependencies[d], n_reserve);
-}
-
-static void merge_dependencies(Unit *u, Unit *other, const char *other_id, 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++) {
- /* Do not add dependencies between u and itself */
- if (back == u) {
- if (set_remove(back->dependencies[k], other))
- maybe_warn_about_dependency(u->id, other_id, k);
- } else {
- r = set_remove_and_put(back->dependencies[k], other, u);
- if (r == -EEXIST)
- set_remove(back->dependencies[k], other);
- else
- assert(r >= 0 || r == -ENOENT);
- }
- }
- }
-
- /* Also do not move dependencies on u to itself */
- back = set_remove(other->dependencies[d], u);
- if (back)
- maybe_warn_about_dependency(u->id, other_id, d);
-
- /* The move cannot fail. The caller must have performed a reservation. */
- assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0);
-
- set_free(other->dependencies[d]);
- other->dependencies[d] = NULL;
-}
-
-int unit_merge(Unit *u, Unit *other) {
- UnitDependency d;
- const char *other_id = NULL;
- int r;
-
- 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_NOT_FOUND)
- return -EEXIST;
-
- if (other->job)
- return -EEXIST;
-
- if (other->nop_job)
- return -EEXIST;
-
- if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
- return -EEXIST;
-
- if (other->id)
- other_id = strdupa(other->id);
-
- /* Make reservations to ensure merge_dependencies() won't fail */
- for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
- r = reserve_dependencies(u, other, d);
- /*
- * We don't rollback reservations if we fail. We don't have
- * a way to undo reservations. A reservation is not a leak.
- */
- if (r < 0)
- return r;
- }
-
- /* Merge names */
- r = merge_names(u, other);
- if (r < 0)
- return r;
-
- /* 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, other_id, 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;
- _cleanup_free_ char *s = NULL;
-
- assert(u);
- assert(name);
-
- if (unit_name_is_template(name)) {
- if (!u->instance)
- return -EINVAL;
-
- s = unit_name_replace_instance(name, u->instance);
- if (!s)
- return -ENOMEM;
-
- name = s;
- }
-
- other = manager_get_unit(u->manager, name);
- if (!other)
- r = unit_add_name(u, name);
- else
- r = unit_merge(u, other);
-
- 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->working_directory) {
- r = unit_require_mounts_for(u, c->working_directory);
- if (r < 0)
- return r;
- }
-
- if (c->root_directory) {
- r = unit_require_mounts_for(u, c->root_directory);
- if (r < 0)
- return r;
- }
-
- if (u->manager->running_as != SYSTEMD_SYSTEM)
- return 0;
-
- if (c->private_tmp) {
- r = unit_require_mounts_for(u, "/tmp");
- if (r < 0)
- return r;
-
- r = unit_require_mounts_for(u, "/var/tmp");
- if (r < 0)
- return r;
- }
-
- 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. */
-
- r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true);
- if (r < 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, **j;
- UnitDependency d;
- Iterator i;
- 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;
- _cleanup_set_free_ Set *following_set = NULL;
- int r;
-
- assert(u);
- assert(u->type >= 0);
-
- prefix = strempty(prefix);
- prefix2 = strjoina(prefix, "\t");
-
- 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"
- "%s\tTransient: %s\n"
- "%s\tSlice: %s\n"
- "%s\tCGroup: %s\n"
- "%s\tCGroup realized: %s\n"
- "%s\tCGroup mask: 0x%x\n"
- "%s\tCGroup members mask: 0x%x\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)),
- prefix, yes_no(u->transient),
- prefix, strna(unit_slice_name(u)),
- prefix, strna(u->cgroup_path),
- prefix, yes_no(u->cgroup_realized),
- prefix, u->cgroup_realized_mask,
- prefix, u->cgroup_members_mask);
-
- SET_FOREACH(t, u->names, i)
- fprintf(f, "%s\tName: %s\n", prefix, t);
-
- STRV_FOREACH(j, u->documentation)
- fprintf(f, "%s\tDocumentation: %s\n", prefix, *j);
-
- following = unit_following(u);
- if (following)
- fprintf(f, "%s\tFollowing: %s\n", prefix, following->id);
-
- r = unit_following_set(u, &following_set);
- if (r >= 0) {
- Unit *other;
-
- SET_FOREACH(other, following_set, i)
- fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id);
- }
-
- if (u->fragment_path)
- fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path);
-
- if (u->source_path)
- fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path);
-
- STRV_FOREACH(j, u->dropin_paths)
- fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j);
-
- if (u->job_timeout > 0)
- fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0));
-
- if (u->job_timeout_action != FAILURE_ACTION_NONE)
- fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action));
-
- if (u->job_timeout_reboot_arg)
- fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg);
-
- condition_dump_list(u->conditions, f, prefix, condition_type_to_string);
- condition_dump_list(u->asserts, f, prefix, assert_type_to_string);
-
- 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));
-
- if (dual_timestamp_is_set(&u->assert_timestamp))
- fprintf(f,
- "%s\tAssert Timestamp: %s\n"
- "%s\tAssert Result: %s\n",
- prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)),
- prefix, yes_no(u->assert_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 (!strv_isempty(u->requires_mounts_for)) {
- fprintf(f,
- "%s\tRequiresMountsFor:", prefix);
-
- STRV_FOREACH(j, u->requires_mounts_for)
- fprintf(f, " %s", *j);
-
- fputs("\n", f);
- }
-
- if (u->load_state == UNIT_LOADED) {
-
- fprintf(f,
- "%s\tStopWhenUnneeded: %s\n"
- "%s\tRefuseManualStart: %s\n"
- "%s\tRefuseManualStop: %s\n"
- "%s\tDefaultDependencies: %s\n"
- "%s\tOnFailureJobMode: %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, job_mode_to_string(u->on_failure_job_mode),
- prefix, yes_no(u->ignore_on_isolate),
- prefix, yes_no(u->ignore_on_snapshot));
-
- 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);
-
- if (u->nop_job)
- job_dump(u->nop_job, f, prefix2);
-
-}
-
-/* Common implementation for multiple backends */
-int unit_load_fragment_and_dropin(Unit *u) {
- int r;
-
- assert(u);
-
- /* Load a .{service,socket,...} file */
- r = unit_load_fragment(u);
- if (r < 0)
- return r;
-
- if (u->load_state == UNIT_STUB)
- return -ENOENT;
-
- /* Load drop-in directory data */
- r = unit_load_dropin(unit_follow_merge(u));
- if (r < 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 */
- r = unit_load_fragment(u);
- if (r < 0)
- return r;
-
- if (u->load_state == UNIT_STUB)
- u->load_state = UNIT_LOADED;
-
- /* Load drop-in directory data */
- r = unit_load_dropin(unit_follow_merge(u));
- if (r < 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_target_dependencies(Unit *u) {
-
- static const UnitDependency deps[] = {
- UNIT_REQUIRED_BY,
- UNIT_REQUIRED_BY_OVERRIDABLE,
- UNIT_WANTED_BY,
- UNIT_BOUND_BY
- };
-
- Unit *target;
- Iterator i;
- unsigned k;
- int r = 0;
-
- assert(u);
-
- for (k = 0; k < ELEMENTSOF(deps); k++)
- SET_FOREACH(target, u->dependencies[deps[k]], i) {
- r = unit_add_default_target_dependency(u, target);
- if (r < 0)
- return r;
- }
-
- return r;
-}
-
-static int unit_add_slice_dependencies(Unit *u) {
- assert(u);
-
- if (!unit_get_cgroup_context(u))
- return 0;
-
- if (UNIT_ISSET(u->slice))
- return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true);
-
- if (streq(u->id, SPECIAL_ROOT_SLICE))
- return 0;
-
- return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true);
-}
-
-static int unit_add_mount_dependencies(Unit *u) {
- char **i;
- int r;
-
- assert(u);
-
- STRV_FOREACH(i, u->requires_mounts_for) {
- char prefix[strlen(*i) + 1];
-
- PATH_FOREACH_PREFIX_MORE(prefix, *i) {
- Unit *m;
-
- r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m);
- if (r < 0)
- return r;
- if (r == 0)
- continue;
- if (m == u)
- continue;
-
- if (m->load_state != UNIT_LOADED)
- continue;
-
- r = unit_add_dependency(u, UNIT_AFTER, m, true);
- if (r < 0)
- return r;
-
- if (m->fragment_path) {
- r = unit_add_dependency(u, UNIT_REQUIRES, m, true);
- if (r < 0)
- return r;
- }
- }
- }
-
- return 0;
-}
-
-static int unit_add_startup_units(Unit *u) {
- CGroupContext *c;
- int r = 0;
-
- c = unit_get_cgroup_context(u);
- if (!c)
- return 0;
-
- if (c->startup_cpu_shares == (unsigned long) -1 &&
- c->startup_blockio_weight == (unsigned long) -1)
- return 0;
-
- r = set_put(u->manager->startup_units, u);
- if (r == -EEXIST)
- return 0;
-
- return r;
-}
-
-int unit_load(Unit *u) {
- int r;
-
- assert(u);
-
- if (u->in_load_queue) {
- LIST_REMOVE(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) {
- r = UNIT_VTABLE(u)->load(u);
- if (r < 0)
- goto fail;
- }
-
- if (u->load_state == UNIT_STUB) {
- r = -ENOENT;
- goto fail;
- }
-
- if (u->load_state == UNIT_LOADED) {
-
- r = unit_add_target_dependencies(u);
- if (r < 0)
- goto fail;
-
- r = unit_add_slice_dependencies(u);
- if (r < 0)
- goto fail;
-
- r = unit_add_mount_dependencies(u);
- if (r < 0)
- goto fail;
-
- r = unit_add_startup_units(u);
- if (r < 0)
- goto fail;
-
- if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) {
- log_unit_error(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id);
- r = -EINVAL;
- goto fail;
- }
-
- unit_update_cgroup_members_masks(u);
- }
-
- 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 = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR;
- u->load_error = r;
- unit_add_to_dbus_queue(u);
- unit_add_to_gc_queue(u);
-
- log_unit_debug(u->id, "Failed to load configuration for %s: %s",
- u->id, strerror(-r));
-
- return r;
-}
-
-static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) {
- Condition *c;
- int triggered = -1;
-
- assert(u);
- assert(to_string);
-
- /* If the condition list is empty, then it is true */
- if (!first)
- return true;
-
- /* Otherwise, if all of the non-trigger conditions apply and
- * if any of the trigger conditions apply (unless there are
- * none) we return true */
- LIST_FOREACH(conditions, c, first) {
- int r;
-
- r = condition_test(c);
- if (r < 0)
- log_unit_warning(u->id,
- "Couldn't determine result for %s=%s%s%s for %s, assuming failed: %s",
- to_string(c->type),
- c->trigger ? "|" : "",
- c->negate ? "!" : "",
- c->parameter,
- u->id,
- strerror(-r));
- else
- log_unit_debug(u->id,
- "%s=%s%s%s %s for %s.",
- to_string(c->type),
- c->trigger ? "|" : "",
- c->negate ? "!" : "",
- c->parameter,
- condition_result_to_string(c->result),
- u->id);
-
- if (!c->trigger && r <= 0)
- return false;
-
- if (c->trigger && triggered <= 0)
- triggered = r > 0;
- }
-
- return triggered != 0;
-}
-
-static bool unit_condition_test(Unit *u) {
- assert(u);
-
- dual_timestamp_get(&u->condition_timestamp);
- u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string);
-
- return u->condition_result;
-}
-
-static bool unit_assert_test(Unit *u) {
- assert(u);
-
- dual_timestamp_get(&u->assert_timestamp);
- u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string);
-
- return u->assert_result;
-}
-
-_pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) {
- const UnitStatusMessageFormats *format_table;
-
- assert(u);
- assert(t >= 0);
- assert(t < _JOB_TYPE_MAX);
-
- if (t != JOB_START && t != JOB_STOP)
- return NULL;
-
- format_table = &UNIT_VTABLE(u)->status_message_formats;
- if (!format_table)
- return NULL;
-
- return format_table->starting_stopping[t == JOB_STOP];
-}
-
-_pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) {
- const char *format;
-
- assert(u);
- assert(t >= 0);
- assert(t < _JOB_TYPE_MAX);
-
- format = unit_get_status_message_format(u, t);
- if (format)
- return format;
-
- /* Return generic strings */
- if (t == JOB_START)
- return "Starting %s.";
- else if (t == JOB_STOP)
- return "Stopping %s.";
- else if (t == JOB_RELOAD)
- return "Reloading %s.";
-
- return NULL;
-}
-
-static void unit_status_print_starting_stopping(Unit *u, JobType t) {
- const char *format;
-
- assert(u);
-
- /* We only print status messages for selected units on
- * selected operations. */
-
- format = unit_get_status_message_format(u, t);
- if (!format)
- return;
-
- DISABLE_WARNING_FORMAT_NONLITERAL;
- unit_status_printf(u, "", format);
- REENABLE_WARNING;
-}
-
-static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) {
- const char *format;
- char buf[LINE_MAX];
- sd_id128_t mid;
-
- assert(u);
-
- if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD)
- return;
-
- if (log_on_console())
- return;
-
- /* We log status messages for all units and all operations. */
-
- format = unit_get_status_message_format_try_harder(u, t);
- if (!format)
- return;
-
- DISABLE_WARNING_FORMAT_NONLITERAL;
- snprintf(buf, sizeof(buf), format, unit_description(u));
- REENABLE_WARNING;
-
- mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING :
- t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING :
- SD_MESSAGE_UNIT_RELOADING;
-
- log_unit_struct(u->id,
- LOG_INFO,
- LOG_MESSAGE_ID(mid),
- LOG_MESSAGE("%s", buf),
- NULL);
-}
-
-/* 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.
- * -EPROTO: Assert failed
- */
-int unit_start(Unit *u) {
- UnitActiveState state;
- Unit *following;
- int r;
-
- 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_unit_debug(u->id, "Starting of %s requested but condition failed. Not starting unit.", u->id);
- return -EALREADY;
- }
-
- /* If the asserts failed, fail the entire job */
- if (state != UNIT_ACTIVATING &&
- !unit_assert_test(u)) {
- log_unit_debug(u->id, "Starting of %s requested but asserts failed.", u->id);
- return -EPROTO;
- }
-
- /* Forward to the main object, if we aren't it. */
- following = unit_following(u);
- if (following) {
- log_unit_debug(u->id, "Redirecting start request from %s to %s.", u->id, following->id);
- return unit_start(following);
- }
-
- if (UNIT_VTABLE(u)->supported && !UNIT_VTABLE(u)->supported(u->manager))
- return -EOPNOTSUPP;
-
- /* 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);
-
- r = UNIT_VTABLE(u)->start(u);
- if (r <= 0)
- return r;
-
- /* Log if the start function actually did something */
- unit_status_log_starting_stopping_reloading(u, JOB_START);
- unit_status_print_starting_stopping(u, JOB_START);
- return r;
-}
-
-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;
- int r;
-
- assert(u);
-
- state = unit_active_state(u);
- if (UNIT_IS_INACTIVE_OR_FAILED(state))
- return -EALREADY;
-
- following = unit_following(u);
- if (following) {
- log_unit_debug(u->id, "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);
-
- r = UNIT_VTABLE(u)->stop(u);
- if (r <= 0)
- return r;
-
- unit_status_log_starting_stopping_reloading(u, JOB_STOP);
- unit_status_print_starting_stopping(u, JOB_STOP);
- return r;
-}
-
-/* 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;
- int r;
-
- 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) {
- log_unit_warning(u->id, "Unit %s cannot be reloaded because it is inactive.", u->id);
- return -ENOEXEC;
- }
-
- following = unit_following(u);
- if (following) {
- log_unit_debug(u->id, "Redirecting reload request from %s to %s.", u->id, following->id);
- return unit_reload(following);
- }
-
- unit_add_to_dbus_queue(u);
-
- r = UNIT_VTABLE(u)->reload(u);
- if (r <= 0)
- return r;
-
- unit_status_log_starting_stopping_reloading(u, JOB_RELOAD);
- return r;
-}
-
-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_active_or_pending(other))
- return;
-
- SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
- if (unit_active_or_pending(other))
- return;
-
- SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i)
- if (unit_active_or_pending(other))
- return;
-
- SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i)
- if (unit_active_or_pending(other))
- return;
-
- log_unit_info(u->id, "Unit %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 unit_check_binds_to(Unit *u) {
- bool stop = false;
- Unit *other;
- Iterator i;
-
- assert(u);
-
- if (u->job)
- return;
-
- if (unit_active_state(u) != UNIT_ACTIVE)
- return;
-
- SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) {
- if (other->job)
- continue;
-
- if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other)))
- continue;
-
- stop = true;
- break;
- }
-
- if (!stop)
- return;
-
- assert(other);
- log_unit_info(u->id, "Unit %s is bound to inactive unit %s. Stopping, too.", u->id, other->id);
-
- /* A unit we need to run is gone. Sniff. Let's stop this. */
- 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_BINDS_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_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_BINDS_TO], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- unit_check_unneeded(other);
-}
-
-void unit_start_on_failure(Unit *u) {
- Unit *other;
- Iterator i;
-
- assert(u);
-
- if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0)
- return;
-
- log_unit_info(u->id, "Triggering OnFailure= dependencies of %s.", u->id);
-
- SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) {
- int r;
-
- r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL);
- if (r < 0)
- log_unit_error_errno(u->id, r, "Failed to enqueue OnFailure= job: %m");
- }
-}
-
-void unit_trigger_notify(Unit *u) {
- Unit *other;
- Iterator i;
-
- assert(u);
-
- SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i)
- if (UNIT_VTABLE(other)->trigger_notify)
- UNIT_VTABLE(other)->trigger_notify(other, u);
-}
-
-void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) {
- Manager *m;
- 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 an expected
- * behavior here. For example: if a mount point is remounted
- * this function will be called too! */
-
- m = u->manager;
-
- /* Update timestamps for state changes */
- if (m->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;
- }
-
- /* Keep track of failed units */
- manager_update_failed_units(u->manager, u, ns == UNIT_FAILED);
-
- /* Make sure the cgroup is always removed when we become inactive */
- if (UNIT_IS_INACTIVE_OR_FAILED(ns))
- unit_destroy_cgroup_if_empty(u);
-
- /* Note that this doesn't apply to RemainAfterExit services exiting
- * successfully, since there's no change of state in that case. Which is
- * why it is handled in service_set_state() */
- if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) {
- ExecContext *ec;
-
- ec = unit_get_exec_context(u);
- if (ec && exec_context_may_touch_console(ec)) {
- if (UNIT_IS_INACTIVE_OR_FAILED(ns)) {
- m->n_on_console --;
-
- if (m->n_on_console == 0)
- /* unset no_console_output flag, since the console is free */
- m->no_console_output = false;
- } else
- m->n_on_console ++;
- }
- }
-
- 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, true);
- 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, true);
- }
-
- 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, true);
- 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, true);
- }
- }
-
- 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, true);
- else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) {
- unexpected = true;
- job_finish_and_invalidate(u->job, JOB_FAILED, true);
- }
-
- break;
-
- default:
- assert_not_reached("Job type unknown");
- }
-
- } else
- unexpected = true;
-
- if (m->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_INACTIVE_OR_DEACTIVATING(ns))
- check_unneeded_dependencies(u);
-
- if (ns != os && ns == UNIT_FAILED) {
- log_unit_notice(u->id, "Unit %s entered failed state.", u->id);
- unit_start_on_failure(u);
- }
- }
-
- /* Some names are special */
- if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
-
- if (unit_has_name(u, SPECIAL_DBUS_SERVICE))
- /* The bus might have just become available,
- * hence try to connect to it, if we aren't
- * yet connected. */
- bus_init(m, true);
-
- if (u->type == UNIT_SERVICE &&
- !UNIT_IS_ACTIVE_OR_RELOADING(os) &&
- m->n_reloading <= 0) {
- /* Write audit record if we have just finished starting up */
- manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true);
- u->in_audit = true;
- }
-
- if (!UNIT_IS_ACTIVE_OR_RELOADING(os))
- manager_send_unit_plymouth(m, 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) &&
- m->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(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE);
-
- if (ns == UNIT_INACTIVE)
- manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true);
- } else
- /* Write audit record if we have just finished shutting down */
- manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE);
-
- u->in_audit = false;
- }
- }
-
- manager_recheck_journal(m);
- unit_trigger_notify(u);
-
- if (u->manager->n_reloading <= 0) {
- /* Maybe we finished startup and are now ready for
- * being stopped because unneeded? */
- unit_check_unneeded(u);
-
- /* Maybe we finished startup, but something we needed
- * has vanished? Let's die then. (This happens when
- * something BindsTo= to a Type=oneshot unit, as these
- * units go directly from starting to inactive,
- * without ever entering started.) */
- unit_check_binds_to(u);
- }
-
- unit_add_to_dbus_queue(u);
- unit_add_to_gc_queue(u);
-}
-
-int unit_watch_pid(Unit *u, pid_t pid) {
- int q, r;
-
- assert(u);
- assert(pid >= 1);
-
- /* Watch a specific PID. We only support one or two units
- * watching each PID for now, not more. */
-
- r = set_ensure_allocated(&u->pids, NULL);
- if (r < 0)
- return r;
-
- r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL);
- if (r < 0)
- return r;
-
- r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u);
- if (r == -EEXIST) {
- r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL);
- if (r < 0)
- return r;
-
- r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u);
- }
-
- q = set_put(u->pids, LONG_TO_PTR(pid));
- if (q < 0)
- return q;
-
- return r;
-}
-
-void unit_unwatch_pid(Unit *u, pid_t pid) {
- assert(u);
- assert(pid >= 1);
-
- hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u);
- hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u);
- set_remove(u->pids, LONG_TO_PTR(pid));
-}
-
-void unit_unwatch_all_pids(Unit *u) {
- assert(u);
-
- while (!set_isempty(u->pids))
- unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids)));
-
- set_free(u->pids);
- u->pids = NULL;
-}
-
-static int unit_watch_pids_in_path(Unit *u, const char *path) {
- _cleanup_closedir_ DIR *d = NULL;
- _cleanup_fclose_ FILE *f = NULL;
- int ret = 0, r;
-
- assert(u);
- assert(path);
-
- /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */
-
- r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f);
- if (r >= 0) {
- pid_t pid;
-
- while ((r = cg_read_pid(f, &pid)) > 0) {
- r = unit_watch_pid(u, pid);
- if (r < 0 && ret >= 0)
- ret = r;
- }
- if (r < 0 && ret >= 0)
- ret = r;
-
- } else if (ret >= 0)
- ret = r;
-
- r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d);
- if (r >= 0) {
- char *fn;
-
- while ((r = cg_read_subgroup(d, &fn)) > 0) {
- _cleanup_free_ char *p = NULL;
-
- p = strjoin(path, "/", fn, NULL);
- free(fn);
-
- if (!p)
- return -ENOMEM;
-
- r = unit_watch_pids_in_path(u, p);
- if (r < 0 && ret >= 0)
- ret = r;
- }
- if (r < 0 && ret >= 0)
- ret = r;
-
- } else if (ret >= 0)
- ret = r;
-
- return ret;
-}
-
-int unit_watch_all_pids(Unit *u) {
- assert(u);
-
- /* Adds all PIDs from our cgroup to the set of PIDs we watch */
-
- if (!u->cgroup_path)
- return -ENOENT;
-
- return unit_watch_pids_in_path(u, u->cgroup_path);
-}
-
-void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) {
- Iterator i;
- void *e;
-
- assert(u);
-
- /* Cleans dead PIDs from our list */
-
- SET_FOREACH(e, u->pids, i) {
- pid_t pid = PTR_TO_LONG(e);
-
- if (pid == except1 || pid == except2)
- continue;
-
- if (!pid_is_unwaited(pid))
- unit_unwatch_pid(u, pid);
- }
-}
-
-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:
- case JOB_NOP:
- 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");
- }
-}
-
-static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency) {
- assert(id);
-
- switch (dependency) {
- case UNIT_REQUIRES:
- case UNIT_REQUIRES_OVERRIDABLE:
- case UNIT_WANTS:
- case UNIT_REQUISITE:
- case UNIT_REQUISITE_OVERRIDABLE:
- case UNIT_BINDS_TO:
- case UNIT_PART_OF:
- case UNIT_REQUIRED_BY:
- case UNIT_REQUIRED_BY_OVERRIDABLE:
- case UNIT_WANTED_BY:
- case UNIT_BOUND_BY:
- case UNIT_CONSISTS_OF:
- case UNIT_REFERENCES:
- case UNIT_REFERENCED_BY:
- case UNIT_PROPAGATES_RELOAD_TO:
- case UNIT_RELOAD_PROPAGATED_FROM:
- case UNIT_JOINS_NAMESPACE_OF:
- return 0;
-
- case UNIT_CONFLICTS:
- case UNIT_CONFLICTED_BY:
- case UNIT_BEFORE:
- case UNIT_AFTER:
- case UNIT_ON_FAILURE:
- case UNIT_TRIGGERS:
- case UNIT_TRIGGERED_BY:
- if (streq_ptr(id, other))
- log_unit_warning(id, "Dependency %s=%s dropped from unit %s",
- unit_dependency_to_string(dependency), id, other);
- else
- log_unit_warning(id, "Dependency %s=%s dropped from unit %s merged into %s",
- unit_dependency_to_string(dependency), id,
- strna(other), id);
- return -EINVAL;
-
- case _UNIT_DEPENDENCY_MAX:
- case _UNIT_DEPENDENCY_INVALID:
- break;
- }
-
- assert_not_reached("Invalid dependency 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_BINDS_TO] = UNIT_BOUND_BY,
- [UNIT_PART_OF] = UNIT_CONSISTS_OF,
- [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
- [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
- [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
- [UNIT_BOUND_BY] = UNIT_BINDS_TO,
- [UNIT_CONSISTS_OF] = UNIT_PART_OF,
- [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_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM,
- [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO,
- [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF,
- };
- int r, q = 0, v = 0, w = 0;
- Unit *orig_u = u, *orig_other = other;
-
- 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) {
- maybe_warn_about_dependency(orig_u->id, orig_other->id, d);
- return 0;
- }
-
- r = set_ensure_allocated(&u->dependencies[d], NULL);
- if (r < 0)
- return r;
-
- if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) {
- r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL);
- if (r < 0)
- return r;
- }
-
- if (add_reference) {
- r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL);
- if (r < 0)
- return r;
-
- r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL);
- if (r < 0)
- return r;
- }
-
- q = set_put(u->dependencies[d], other);
- if (q < 0)
- return q;
-
- if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) {
- v = set_put(other->dependencies[inverse_table[d]], u);
- if (v < 0) {
- r = v;
- goto fail;
- }
- }
-
- if (add_reference) {
- w = set_put(u->dependencies[UNIT_REFERENCES], other);
- if (w < 0) {
- r = w;
- goto fail;
- }
-
- r = set_put(other->dependencies[UNIT_REFERENCED_BY], u);
- if (r < 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);
-
- r = unit_add_dependency(u, d, other, add_reference);
- if (r < 0)
- return r;
-
- r = unit_add_dependency(u, e, other, add_reference);
- if (r < 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);
- assert(p);
-
- if (!name)
- name = basename(path);
-
- if (!unit_name_is_template(name)) {
- *p = NULL;
- return name;
- }
-
- if (u->instance)
- s = unit_name_replace_instance(name, u->instance);
- else {
- _cleanup_free_ char *i = NULL;
-
- i = unit_name_to_prefix(u->id);
- if (!i)
- return NULL;
-
- s = unit_name_replace_instance(name, 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;
- _cleanup_free_ char *s = NULL;
-
- assert(u);
- assert(name || path);
-
- name = resolve_template(u, name, path, &s);
- if (!name)
- return -ENOMEM;
-
- r = manager_load_unit(u->manager, name, path, NULL, &other);
- if (r < 0)
- return r;
-
- return unit_add_dependency(u, d, other, add_reference);
-}
-
-int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) {
- _cleanup_free_ char *s = NULL;
- Unit *other;
- int r;
-
- assert(u);
- assert(name || path);
-
- name = resolve_template(u, name, path, &s);
- if (!name)
- return -ENOMEM;
-
- r = manager_load_unit(u->manager, name, path, NULL, &other);
- if (r < 0)
- return r;
-
- return unit_add_two_dependencies(u, d, e, other, add_reference);
-}
-
-int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) {
- Unit *other;
- int r;
- _cleanup_free_ char *s = NULL;
-
- assert(u);
- assert(name || path);
-
- name = resolve_template(u, name, path, &s);
- if (!name)
- return -ENOMEM;
-
- r = manager_load_unit(u->manager, name, path, NULL, &other);
- if (r < 0)
- return r;
-
- return unit_add_dependency(other, d, u, add_reference);
-}
-
-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;
- _cleanup_free_ char *s = NULL;
-
- assert(u);
- assert(name || path);
-
- name = resolve_template(u, name, path, &s);
- if (!name)
- return -ENOMEM;
-
- r = manager_load_unit(u->manager, name, path, NULL, &other);
- if (r < 0)
- return r;
-
- r = unit_add_two_dependencies(other, d, e, u, add_reference);
- if (r < 0)
- return r;
-
- return r;
-}
-
-int set_unit_path(const char *p) {
- /* This is mostly for debug purposes */
- if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0)
- return -errno;
-
- return 0;
-}
-
-char *unit_dbus_path(Unit *u) {
- assert(u);
-
- if (!u->id)
- return NULL;
-
- return unit_dbus_path_from_name(u->id);
-}
-
-char *unit_default_cgroup_path(Unit *u) {
- _cleanup_free_ char *escaped = NULL, *slice = NULL;
- int r;
-
- assert(u);
-
- if (unit_has_name(u, SPECIAL_ROOT_SLICE))
- return strdup(u->manager->cgroup_root);
-
- if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) {
- r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice);
- if (r < 0)
- return NULL;
- }
-
- escaped = cg_escape(u->id);
- if (!escaped)
- return NULL;
-
- if (slice)
- return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL);
- else
- return strjoin(u->manager->cgroup_root, "/", escaped, NULL);
-}
-
-int unit_add_default_slice(Unit *u, CGroupContext *c) {
- _cleanup_free_ char *b = NULL;
- const char *slice_name;
- Unit *slice;
- int r;
-
- assert(u);
- assert(c);
-
- if (UNIT_ISSET(u->slice))
- return 0;
-
- if (u->instance) {
- _cleanup_free_ char *prefix = NULL, *escaped = NULL;
-
- /* Implicitly place all instantiated units in their
- * own per-template slice */
-
- prefix = unit_name_to_prefix(u->id);
- if (!prefix)
- return -ENOMEM;
-
- /* The prefix is already escaped, but it might include
- * "-" which has a special meaning for slice units,
- * hence escape it here extra. */
- escaped = strreplace(prefix, "-", "\\x2d");
- if (!escaped)
- return -ENOMEM;
-
- if (u->manager->running_as == SYSTEMD_SYSTEM)
- b = strjoin("system-", escaped, ".slice", NULL);
- else
- b = strappend(escaped, ".slice");
- if (!b)
- return -ENOMEM;
-
- slice_name = b;
- } else
- slice_name =
- u->manager->running_as == SYSTEMD_SYSTEM
- ? SPECIAL_SYSTEM_SLICE
- : SPECIAL_ROOT_SLICE;
-
- r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice);
- if (r < 0)
- return r;
-
- unit_ref_set(&u->slice, slice);
- return 0;
-}
-
-const char *unit_slice_name(Unit *u) {
- assert(u);
-
- if (!UNIT_ISSET(u->slice))
- return NULL;
-
- return UNIT_DEREF(u->slice)->id;
-}
-
-int unit_load_related_unit(Unit *u, const char *type, Unit **_found) {
- _cleanup_free_ char *t = NULL;
- int r;
-
- assert(u);
- assert(type);
- assert(_found);
-
- t = unit_name_change_suffix(u->id, type);
- if (!t)
- return -ENOMEM;
-
- assert(!unit_has_name(u, t));
-
- r = manager_load_unit(u->manager, t, NULL, NULL, _found);
- assert(r < 0 || *_found != u);
- return r;
-}
-
-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, bool serialize_jobs) {
- int r;
-
- assert(u);
- assert(f);
- assert(fds);
-
- if (unit_can_serialize(u)) {
- ExecRuntime *rt;
-
- r = UNIT_VTABLE(u)->serialize(u, f, fds);
- if (r < 0)
- return r;
-
- rt = unit_get_exec_runtime(u);
- if (rt) {
- r = exec_runtime_serialize(rt, u, f, fds);
- if (r < 0)
- return r;
- }
- }
-
- 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);
- dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp);
-
- if (dual_timestamp_is_set(&u->condition_timestamp))
- unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result));
-
- if (dual_timestamp_is_set(&u->assert_timestamp))
- unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result));
-
- unit_serialize_item(u, f, "transient", yes_no(u->transient));
- unit_serialize_item_format(u, f, "cpuacct-usage-base", "%" PRIu64, u->cpuacct_usage_base);
-
- if (u->cgroup_path)
- unit_serialize_item(u, f, "cgroup", u->cgroup_path);
-
- if (serialize_jobs) {
- if (u->job) {
- fprintf(f, "job\n");
- job_serialize(u->job, f, fds);
- }
-
- if (u->nop_job) {
- fprintf(f, "job\n");
- job_serialize(u->nop_job, f, fds);
- }
- }
-
- /* 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) {
- ExecRuntime **rt = NULL;
- size_t offset;
- int r;
-
- assert(u);
- assert(f);
- assert(fds);
-
- offset = UNIT_VTABLE(u)->exec_runtime_offset;
- if (offset > 0)
- rt = (ExecRuntime**) ((uint8_t*) u + offset);
-
- 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")) {
- if (v[0] == '\0') {
- /* new-style serialized job */
- Job *j;
-
- j = job_new_raw(u);
- if (!j)
- return -ENOMEM;
-
- r = job_deserialize(j, f, fds);
- if (r < 0) {
- job_free(j);
- return r;
- }
-
- r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j);
- if (r < 0) {
- job_free(j);
- return r;
- }
-
- r = job_install_deserialized(j);
- if (r < 0) {
- hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id));
- job_free(j);
- return r;
- }
- } else {
- /* legacy */
- JobType type;
-
- type = job_type_from_string(v);
- if (type < 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, "assert-timestamp")) {
- dual_timestamp_deserialize(v, &u->assert_timestamp);
- continue;
- } else if (streq(l, "condition-result")) {
- int b;
-
- b = parse_boolean(v);
- if (b < 0)
- log_debug("Failed to parse condition result value %s", v);
- else
- u->condition_result = b;
-
- continue;
-
- } else if (streq(l, "assert-result")) {
- int b;
-
- b = parse_boolean(v);
- if (b < 0)
- log_debug("Failed to parse assert result value %s", v);
- else
- u->assert_result = b;
-
- continue;
-
- } else if (streq(l, "transient")) {
- int b;
-
- b = parse_boolean(v);
- if (b < 0)
- log_debug("Failed to parse transient bool %s", v);
- else
- u->transient = b;
-
- continue;
- } else if (streq(l, "cpuacct-usage-base")) {
-
- r = safe_atou64(v, &u->cpuacct_usage_base);
- if (r < 0)
- log_debug("Failed to parse CPU usage %s", v);
-
- } else if (streq(l, "cgroup")) {
- char *s;
-
- s = strdup(v);
- if (!s)
- return -ENOMEM;
-
- if (u->cgroup_path) {
- void *p;
-
- p = hashmap_remove(u->manager->cgroup_unit, u->cgroup_path);
- log_info("Removing cgroup_path %s from hashmap (%p)", u->cgroup_path, p);
- free(u->cgroup_path);
- }
-
- u->cgroup_path = s;
- assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1);
-
- continue;
- }
-
- if (unit_can_serialize(u)) {
- if (rt) {
- r = exec_runtime_deserialize_item(rt, u, l, v, fds);
- if (r < 0)
- return r;
- if (r > 0)
- continue;
- }
-
- r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds);
- if (r < 0)
- return r;
- }
- }
-}
-
-int unit_add_node_link(Unit *u, const char *what, bool wants) {
- Unit *device;
- _cleanup_free_ char *e = NULL;
- 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;
-
- e = unit_name_from_path(what, ".device");
- if (!e)
- return -ENOMEM;
-
- r = manager_load_unit(u->manager, e, NULL, NULL, &device);
- if (r < 0)
- return r;
-
- r = unit_add_two_dependencies(u, UNIT_AFTER, u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_BINDS_TO : UNIT_WANTS, device, true);
- if (r < 0)
- return r;
-
- if (wants) {
- r = unit_add_dependency(device, UNIT_WANTS, u, false);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-static int unit_add_deserialized_job_coldplug(Unit *u) {
- int r;
-
- r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL);
- if (r < 0)
- return r;
-
- u->deserialized_job = _JOB_TYPE_INVALID;
-
- return 0;
-}
-
-int unit_coldplug(Unit *u, Hashmap *deferred_work) {
- int r;
-
- assert(u);
-
- if (UNIT_VTABLE(u)->coldplug)
- if ((r = UNIT_VTABLE(u)->coldplug(u, deferred_work)) < 0)
- return r;
-
- if (u->job) {
- r = job_coldplug(u->job);
- if (r < 0)
- return r;
- } else if (u->deserialized_job >= 0)
- /* legacy */
- hashmap_put(deferred_work, u, &unit_add_deserialized_job_coldplug);
-
- return 0;
-}
-
-void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) {
- DISABLE_WARNING_FORMAT_NONLITERAL;
- manager_status_printf(u->manager, STATUS_TYPE_NORMAL,
- status, unit_status_msg_format, unit_description(u));
- REENABLE_WARNING;
-}
-
-bool unit_need_daemon_reload(Unit *u) {
- _cleanup_strv_free_ char **t = NULL;
- char **path;
- struct stat st;
- unsigned loaded_cnt, current_cnt;
-
- assert(u);
-
- if (u->fragment_path) {
- 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 (u->source_path) {
- zero(st);
- if (stat(u->source_path, &st) < 0)
- return true;
-
- if (u->source_mtime > 0 &&
- timespec_load(&st.st_mtim) != u->source_mtime)
- return true;
- }
-
- (void) unit_find_dropin_paths(u, &t);
- loaded_cnt = strv_length(t);
- current_cnt = strv_length(u->dropin_paths);
-
- if (loaded_cnt == current_cnt) {
- if (loaded_cnt == 0)
- return false;
-
- if (strv_overlap(u->dropin_paths, t)) {
- STRV_FOREACH(path, u->dropin_paths) {
- zero(st);
- if (stat(*path, &st) < 0)
- return true;
-
- if (u->dropin_mtime > 0 &&
- timespec_load(&st.st_mtim) > u->dropin_mtime)
- return true;
- }
-
- return false;
- } else
- return true;
- } else
- return true;
-}
-
-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_stop_pending(Unit *u) {
- assert(u);
-
- /* This call does check the current state of the unit. It's
- * hence useful to be called from state change calls of the
- * unit itself, where the state isn't updated yet. This is
- * different from unit_inactive_or_pending() which checks both
- * the current state and for a queued job. */
-
- return u->job && u->job->type == JOB_STOP;
-}
-
-bool unit_inactive_or_pending(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 (unit_stop_pending(u))
- return true;
-
- return false;
-}
-
-bool unit_active_or_pending(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;
-}
-
-int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) {
- assert(u);
- assert(w >= 0 && w < _KILL_WHO_MAX);
- assert(signo > 0);
- assert(signo < _NSIG);
-
- if (!UNIT_VTABLE(u)->kill)
- return -EOPNOTSUPP;
-
- return UNIT_VTABLE(u)->kill(u, w, signo, error);
-}
-
-static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) {
- Set *pid_set;
- int r;
-
- pid_set = set_new(NULL);
- if (!pid_set)
- return NULL;
-
- /* Exclude the main/control pids from being killed via the cgroup */
- if (main_pid > 0) {
- r = set_put(pid_set, LONG_TO_PTR(main_pid));
- if (r < 0)
- goto fail;
- }
-
- if (control_pid > 0) {
- r = set_put(pid_set, LONG_TO_PTR(control_pid));
- if (r < 0)
- goto fail;
- }
-
- return pid_set;
-
-fail:
- set_free(pid_set);
- return NULL;
-}
-
-int unit_kill_common(
- Unit *u,
- KillWho who,
- int signo,
- pid_t main_pid,
- pid_t control_pid,
- sd_bus_error *error) {
-
- int r = 0;
-
- if (who == KILL_MAIN && main_pid <= 0) {
- if (main_pid < 0)
- return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type));
- else
- return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
- }
-
- if (who == KILL_CONTROL && control_pid <= 0) {
- if (control_pid < 0)
- return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type));
- else
- return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
- }
-
- if (who == KILL_CONTROL || who == KILL_ALL)
- if (control_pid > 0)
- if (kill(control_pid, signo) < 0)
- r = -errno;
-
- if (who == KILL_MAIN || who == KILL_ALL)
- if (main_pid > 0)
- if (kill(main_pid, signo) < 0)
- r = -errno;
-
- if (who == KILL_ALL && u->cgroup_path) {
- _cleanup_set_free_ Set *pid_set = NULL;
- int q;
-
- /* Exclude the main/control pids from being killed via the cgroup */
- pid_set = unit_pid_set(main_pid, control_pid);
- if (!pid_set)
- return -ENOMEM;
-
- q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set);
- if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
- r = q;
- }
-
- return r;
-}
-
-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 == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
- NULL, basename(u->fragment_path));
-
- return u->unit_file_state;
-}
-
-int unit_get_unit_file_preset(Unit *u) {
- assert(u);
-
- if (u->unit_file_preset < 0 && u->fragment_path)
- u->unit_file_preset = unit_file_query_preset(
- u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
- NULL, basename(u->fragment_path));
-
- return u->unit_file_preset;
-}
-
-Unit* unit_ref_set(UnitRef *ref, Unit *u) {
- assert(ref);
- assert(u);
-
- if (ref->unit)
- unit_ref_unset(ref);
-
- ref->unit = u;
- LIST_PREPEND(refs, u->refs, ref);
- return u;
-}
-
-void unit_ref_unset(UnitRef *ref) {
- assert(ref);
-
- if (!ref->unit)
- return;
-
- LIST_REMOVE(refs, ref->unit->refs, ref);
- ref->unit = NULL;
-}
-
-int unit_patch_contexts(Unit *u) {
- CGroupContext *cc;
- ExecContext *ec;
- unsigned i;
- int r;
-
- assert(u);
-
- /* Patch in the manager defaults into the exec and cgroup
- * contexts, _after_ the rest of the settings have been
- * initialized */
-
- ec = unit_get_exec_context(u);
- if (ec) {
- /* This only copies in the ones that need memory */
- for (i = 0; i < _RLIMIT_MAX; i++)
- if (u->manager->rlimit[i] && !ec->rlimit[i]) {
- ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1);
- if (!ec->rlimit[i])
- return -ENOMEM;
- }
-
- if (u->manager->running_as == SYSTEMD_USER &&
- !ec->working_directory) {
-
- r = get_home_dir(&ec->working_directory);
- if (r < 0)
- return r;
-
- /* Allow user services to run, even if the
- * home directory is missing */
- ec->working_directory_missing_ok = true;
- }
-
- if (u->manager->running_as == SYSTEMD_USER &&
- (ec->syscall_whitelist ||
- !set_isempty(ec->syscall_filter) ||
- !set_isempty(ec->syscall_archs) ||
- ec->address_families_whitelist ||
- !set_isempty(ec->address_families)))
- ec->no_new_privileges = true;
-
- if (ec->private_devices)
- ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD;
- }
-
- cc = unit_get_cgroup_context(u);
- if (cc) {
-
- if (ec &&
- ec->private_devices &&
- cc->device_policy == CGROUP_AUTO)
- cc->device_policy = CGROUP_CLOSED;
- }
-
- return 0;
-}
-
-ExecContext *unit_get_exec_context(Unit *u) {
- size_t offset;
- assert(u);
-
- if (u->type < 0)
- return NULL;
-
- offset = UNIT_VTABLE(u)->exec_context_offset;
- if (offset <= 0)
- return NULL;
-
- return (ExecContext*) ((uint8_t*) u + offset);
-}
-
-KillContext *unit_get_kill_context(Unit *u) {
- size_t offset;
- assert(u);
-
- if (u->type < 0)
- return NULL;
-
- offset = UNIT_VTABLE(u)->kill_context_offset;
- if (offset <= 0)
- return NULL;
-
- return (KillContext*) ((uint8_t*) u + offset);
-}
-
-CGroupContext *unit_get_cgroup_context(Unit *u) {
- size_t offset;
-
- if (u->type < 0)
- return NULL;
-
- offset = UNIT_VTABLE(u)->cgroup_context_offset;
- if (offset <= 0)
- return NULL;
-
- return (CGroupContext*) ((uint8_t*) u + offset);
-}
-
-ExecRuntime *unit_get_exec_runtime(Unit *u) {
- size_t offset;
-
- if (u->type < 0)
- return NULL;
-
- offset = UNIT_VTABLE(u)->exec_runtime_offset;
- if (offset <= 0)
- return NULL;
-
- return *(ExecRuntime**) ((uint8_t*) u + offset);
-}
-
-static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) {
- if (u->manager->running_as == SYSTEMD_USER) {
- int r;
-
- if (mode == UNIT_PERSISTENT && !transient)
- r = user_config_home(dir);
- else
- r = user_runtime_dir(dir);
-
- if (r == 0)
- return -ENOENT;
- return r;
- }
-
- if (mode == UNIT_PERSISTENT && !transient)
- *dir = strdup("/etc/systemd/system");
- else
- *dir = strdup("/run/systemd/system");
- if (!*dir)
- return -ENOMEM;
-
- return 0;
-}
-
-static int unit_drop_in_file(Unit *u,
- UnitSetPropertiesMode mode, const char *name, char **p, char **q) {
- _cleanup_free_ char *dir = NULL;
- int r;
-
- assert(u);
-
- r = unit_drop_in_dir(u, mode, u->transient, &dir);
- if (r < 0)
- return r;
-
- return drop_in_file(dir, u->id, 50, name, p, q);
-}
-
-int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
-
- _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL;
- int r;
-
- assert(u);
-
- if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME))
- return 0;
-
- r = unit_drop_in_dir(u, mode, u->transient, &dir);
- if (r < 0)
- return r;
-
- r = write_drop_in(dir, u->id, 50, name, data);
- if (r < 0)
- return r;
-
- r = drop_in_file(dir, u->id, 50, name, &p, &q);
- if (r < 0)
- return r;
-
- r = strv_extend(&u->dropin_paths, q);
- if (r < 0)
- return r;
-
- strv_sort(u->dropin_paths);
- strv_uniq(u->dropin_paths);
-
- u->dropin_mtime = now(CLOCK_REALTIME);
-
- return 0;
-}
-
-int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) {
- _cleanup_free_ char *p = NULL;
- va_list ap;
- int r;
-
- assert(u);
- assert(name);
- assert(format);
-
- if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME))
- return 0;
-
- va_start(ap, format);
- r = vasprintf(&p, format, ap);
- va_end(ap);
-
- if (r < 0)
- return -ENOMEM;
-
- return unit_write_drop_in(u, mode, name, p);
-}
-
-int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) {
- _cleanup_free_ char *ndata = NULL;
-
- assert(u);
- assert(name);
- assert(data);
-
- if (!UNIT_VTABLE(u)->private_section)
- return -EINVAL;
-
- if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME))
- return 0;
-
- ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL);
- if (!ndata)
- return -ENOMEM;
-
- return unit_write_drop_in(u, mode, name, ndata);
-}
-
-int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) {
- _cleanup_free_ char *p = NULL;
- va_list ap;
- int r;
-
- assert(u);
- assert(name);
- assert(format);
-
- if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME))
- return 0;
-
- va_start(ap, format);
- r = vasprintf(&p, format, ap);
- va_end(ap);
-
- if (r < 0)
- return -ENOMEM;
-
- return unit_write_drop_in_private(u, mode, name, p);
-}
-
-int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) {
- _cleanup_free_ char *p = NULL, *q = NULL;
- int r;
-
- assert(u);
-
- if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME))
- return 0;
-
- r = unit_drop_in_file(u, mode, name, &p, &q);
- if (r < 0)
- return r;
-
- if (unlink(q) < 0)
- r = errno == ENOENT ? 0 : -errno;
- else
- r = 1;
-
- rmdir(p);
- return r;
-}
-
-int unit_make_transient(Unit *u) {
- int r;
-
- assert(u);
-
- u->load_state = UNIT_STUB;
- u->load_error = 0;
- u->transient = true;
-
- free(u->fragment_path);
- u->fragment_path = NULL;
-
- if (u->manager->running_as == SYSTEMD_USER) {
- _cleanup_free_ char *c = NULL;
-
- r = user_runtime_dir(&c);
- if (r < 0)
- return r;
- if (r == 0)
- return -ENOENT;
-
- u->fragment_path = strjoin(c, "/", u->id, NULL);
- if (!u->fragment_path)
- return -ENOMEM;
-
- mkdir_p(c, 0755);
- } else {
- u->fragment_path = strappend("/run/systemd/system/", u->id);
- if (!u->fragment_path)
- return -ENOMEM;
-
- mkdir_p("/run/systemd/system", 0755);
- }
-
- return write_string_file_atomic_label(u->fragment_path, "# Transient stub");
-}
-
-int unit_kill_context(
- Unit *u,
- KillContext *c,
- KillOperation k,
- pid_t main_pid,
- pid_t control_pid,
- bool main_pid_alien) {
-
- int sig, wait_for_exit = false, r;
-
- assert(u);
- assert(c);
-
- if (c->kill_mode == KILL_NONE)
- return 0;
-
- switch (k) {
- case KILL_KILL:
- sig = SIGKILL;
- break;
- case KILL_ABORT:
- sig = SIGABRT;
- break;
- case KILL_TERMINATE:
- sig = c->kill_signal;
- break;
- default:
- assert_not_reached("KillOperation unknown");
- }
-
- if (main_pid > 0) {
- r = kill_and_sigcont(main_pid, sig);
-
- if (r < 0 && r != -ESRCH) {
- _cleanup_free_ char *comm = NULL;
- get_process_comm(main_pid, &comm);
-
- log_unit_warning_errno(u->id, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm));
- } else {
- if (!main_pid_alien)
- wait_for_exit = true;
-
- if (c->send_sighup && k != KILL_KILL)
- kill(main_pid, SIGHUP);
- }
- }
-
- if (control_pid > 0) {
- r = kill_and_sigcont(control_pid, sig);
-
- if (r < 0 && r != -ESRCH) {
- _cleanup_free_ char *comm = NULL;
- get_process_comm(control_pid, &comm);
-
- log_unit_warning_errno(u->id, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm));
- } else {
- wait_for_exit = true;
-
- if (c->send_sighup && k != KILL_KILL)
- kill(control_pid, SIGHUP);
- }
- }
-
- if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) {
- _cleanup_set_free_ Set *pid_set = NULL;
-
- /* Exclude the main/control pids from being killed via the cgroup */
- pid_set = unit_pid_set(main_pid, control_pid);
- if (!pid_set)
- return -ENOMEM;
-
- r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set);
- if (r < 0) {
- if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
- log_unit_warning_errno(u->id, r, "Failed to kill control group: %m");
- } else if (r > 0) {
-
- /* FIXME: For now, we will not wait for the
- * cgroup members to die, simply because
- * cgroup notification is unreliable. It
- * doesn't work at all in containers, and
- * outside of containers it can be confused
- * easily by leaving directories in the
- * cgroup. */
-
- /* wait_for_exit = true; */
-
- if (c->send_sighup && k != KILL_KILL) {
- set_free(pid_set);
-
- pid_set = unit_pid_set(main_pid, control_pid);
- if (!pid_set)
- return -ENOMEM;
-
- cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set);
- }
- }
- }
-
- return wait_for_exit;
-}
-
-int unit_require_mounts_for(Unit *u, const char *path) {
- char prefix[strlen(path) + 1], *p;
- int r;
-
- assert(u);
- assert(path);
-
- /* Registers a unit for requiring a certain path and all its
- * prefixes. We keep a simple array of these paths in the
- * unit, since its usually short. However, we build a prefix
- * table for all possible prefixes so that new appearing mount
- * units can easily determine which units to make themselves a
- * dependency of. */
-
- if (!path_is_absolute(path))
- return -EINVAL;
-
- p = strdup(path);
- if (!p)
- return -ENOMEM;
-
- path_kill_slashes(p);
-
- if (!path_is_safe(p)) {
- free(p);
- return -EPERM;
- }
-
- if (strv_contains(u->requires_mounts_for, p)) {
- free(p);
- return 0;
- }
-
- r = strv_consume(&u->requires_mounts_for, p);
- if (r < 0)
- return r;
-
- PATH_FOREACH_PREFIX_MORE(prefix, p) {
- Set *x;
-
- x = hashmap_get(u->manager->units_requiring_mounts_for, prefix);
- if (!x) {
- char *q;
-
- if (!u->manager->units_requiring_mounts_for) {
- u->manager->units_requiring_mounts_for = hashmap_new(&string_hash_ops);
- if (!u->manager->units_requiring_mounts_for)
- return -ENOMEM;
- }
-
- q = strdup(prefix);
- if (!q)
- return -ENOMEM;
-
- x = set_new(NULL);
- if (!x) {
- free(q);
- return -ENOMEM;
- }
-
- r = hashmap_put(u->manager->units_requiring_mounts_for, q, x);
- if (r < 0) {
- free(q);
- set_free(x);
- return r;
- }
- }
-
- r = set_put(x, u);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-int unit_setup_exec_runtime(Unit *u) {
- ExecRuntime **rt;
- size_t offset;
- Iterator i;
- Unit *other;
-
- offset = UNIT_VTABLE(u)->exec_runtime_offset;
- assert(offset > 0);
-
- /* Check if there already is an ExecRuntime for this unit? */
- rt = (ExecRuntime**) ((uint8_t*) u + offset);
- if (*rt)
- return 0;
-
- /* Try to get it from somebody else */
- SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) {
-
- *rt = unit_get_exec_runtime(other);
- if (*rt) {
- exec_runtime_ref(*rt);
- return 0;
- }
- }
-
- return exec_runtime_make(rt, unit_get_exec_context(u), u->id);
-}
-
-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);
~ianmdlvl / elogind.git / blobdiff