+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
-
-/***
- 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 "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"
-
-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 *unit_new(Manager *m) {
- Unit *u;
-
- assert(m);
-
- if (!(u = new0(Unit, 1)))
- return NULL;
-
- if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) {
- free(u);
- return NULL;
- }
-
- u->meta.manager = m;
- u->meta.type = _UNIT_TYPE_INVALID;
-
- return u;
-}
-
-bool unit_has_name(Unit *u, const char *name) {
- assert(u);
- assert(name);
-
- return !!set_get(u->meta.names, (char*) name);
-}
-
-int unit_add_name(Unit *u, const char *text) {
- UnitType t;
- char *s = NULL, *i = NULL;
- int r;
-
- assert(u);
- assert(text);
-
- if (unit_name_is_template(text)) {
- if (!u->meta.instance)
- return -EINVAL;
-
- s = unit_name_replace_instance(text, u->meta.instance);
- } else
- s = strdup(text);
-
- if (!s)
- return -ENOMEM;
-
- if (!unit_name_is_valid(s)) {
- r = -EINVAL;
- goto fail;
- }
-
- assert_se((t = unit_name_to_type(s)) >= 0);
-
- if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) {
- r = -EINVAL;
- goto fail;
- }
-
- if ((r = unit_name_to_instance(s, &i)) < 0)
- goto fail;
-
- if (i && unit_vtable[t]->no_instances)
- goto fail;
-
- if (u->meta.type != _UNIT_TYPE_INVALID && !streq_ptr(u->meta.instance, i)) {
- r = -EINVAL;
- goto fail;
- }
-
- if (unit_vtable[t]->no_alias &&
- !set_isempty(u->meta.names) &&
- !set_get(u->meta.names, s)) {
- r = -EEXIST;
- goto fail;
- }
-
- if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) {
- r = -E2BIG;
- goto fail;
- }
-
- if ((r = set_put(u->meta.names, s)) < 0) {
- if (r == -EEXIST)
- r = 0;
- goto fail;
- }
-
- if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) {
- set_remove(u->meta.names, s);
- goto fail;
- }
-
- if (u->meta.type == _UNIT_TYPE_INVALID) {
-
- u->meta.type = t;
- u->meta.id = s;
- u->meta.instance = i;
-
- LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta);
-
- 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;
-
- assert(u);
- assert(name);
-
- if (unit_name_is_template(name)) {
-
- if (!u->meta.instance)
- return -EINVAL;
-
- if (!(t = unit_name_replace_instance(name, u->meta.instance)))
- return -ENOMEM;
-
- name = t;
- }
-
- /* Selects one of the names of this unit as the id */
- s = set_get(u->meta.names, (char*) name);
- free(t);
-
- if (!s)
- return -ENOENT;
-
- u->meta.id = s;
- 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->meta.description);
- u->meta.description = s;
-
- unit_add_to_dbus_queue(u);
- return 0;
-}
-
-bool unit_check_gc(Unit *u) {
- assert(u);
-
- if (UNIT_VTABLE(u)->no_gc)
- return true;
-
- if (u->meta.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->meta.type != _UNIT_TYPE_INVALID);
-
- if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue)
- return;
-
- LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
- u->meta.in_load_queue = true;
-}
-
-void unit_add_to_cleanup_queue(Unit *u) {
- assert(u);
-
- if (u->meta.in_cleanup_queue)
- return;
-
- LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
- u->meta.in_cleanup_queue = true;
-}
-
-void unit_add_to_gc_queue(Unit *u) {
- assert(u);
-
- if (u->meta.in_gc_queue || u->meta.in_cleanup_queue)
- return;
-
- if (unit_check_gc(u))
- return;
-
- LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta);
- u->meta.in_gc_queue = true;
-
- u->meta.manager->n_in_gc_queue ++;
-
- if (u->meta.manager->gc_queue_timestamp <= 0)
- u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC);
-}
-
-void unit_add_to_dbus_queue(Unit *u) {
- assert(u);
- assert(u->meta.type != _UNIT_TYPE_INVALID);
-
- if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue)
- return;
-
- if (set_isempty(u->meta.manager->subscribed)) {
- u->meta.sent_dbus_new_signal = true;
- return;
- }
-
- LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
- u->meta.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->meta.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);
-
- /* Detach from next 'bigger' objects */
- SET_FOREACH(t, u->meta.names, i)
- hashmap_remove_value(u->meta.manager->units, t, u);
-
- if (u->meta.type != _UNIT_TYPE_INVALID)
- LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta);
-
- if (u->meta.in_load_queue)
- LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
-
- if (u->meta.in_dbus_queue)
- LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
-
- if (u->meta.in_cleanup_queue)
- LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta);
-
- if (u->meta.in_gc_queue) {
- LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta);
- u->meta.manager->n_in_gc_queue--;
- }
-
- /* Free data and next 'smaller' objects */
- if (u->meta.job)
- job_free(u->meta.job);
-
- if (u->meta.load_state != UNIT_STUB)
- if (UNIT_VTABLE(u)->done)
- UNIT_VTABLE(u)->done(u);
-
- cgroup_bonding_free_list(u->meta.cgroup_bondings);
-
- for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
- bidi_set_free(u, u->meta.dependencies[d]);
-
- free(u->meta.description);
- free(u->meta.fragment_path);
-
- while ((t = set_steal_first(u->meta.names)))
- free(t);
- set_free(u->meta.names);
-
- free(u->meta.instance);
-
- free(u);
-}
-
-UnitActiveState unit_active_state(Unit *u) {
- assert(u);
-
- if (u->meta.load_state != UNIT_LOADED)
- return UNIT_INACTIVE;
-
- 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->meta.names, &other->meta.names);
-
- while ((t = set_steal_first(other->meta.names)))
- free(t);
-
- set_free(other->meta.names);
- other->meta.names = NULL;
- other->meta.id = NULL;
-
- SET_FOREACH(t, u->meta.names, i)
- assert_se(hashmap_replace(u->meta.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);
-
- SET_FOREACH(back, other->meta.dependencies[d], i) {
- UnitDependency k;
-
- for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++)
- if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) {
-
- if (r == -EEXIST)
- set_remove(back->meta.dependencies[k], other);
- else
- assert(r == -ENOENT);
- }
- }
-
- complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]);
-
- set_free(other->meta.dependencies[d]);
- other->meta.dependencies[d] = NULL;
-}
-
-int unit_merge(Unit *u, Unit *other) {
- UnitDependency d;
-
- assert(u);
- assert(other);
- assert(u->meta.manager == other->meta.manager);
- assert(u->meta.type != _UNIT_TYPE_INVALID);
-
- other = unit_follow_merge(other);
-
- if (other == u)
- return 0;
-
- if (u->meta.type != other->meta.type)
- return -EINVAL;
-
- if (!streq_ptr(u->meta.instance, other->meta.instance))
- return -EINVAL;
-
- if (other->meta.load_state != UNIT_STUB &&
- other->meta.load_state != UNIT_FAILED)
- return -EEXIST;
-
- if (other->meta.job)
- return -EEXIST;
-
- if (unit_active_state(other) != UNIT_INACTIVE)
- return -EEXIST;
-
- /* Merge names */
- merge_names(u, other);
-
- /* Merge dependencies */
- for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++)
- merge_dependencies(u, other, d);
-
- other->meta.load_state = UNIT_MERGED;
- other->meta.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->meta.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->meta.instance)
- return -EINVAL;
-
- if (!(s = unit_name_replace_instance(name, u->meta.instance)))
- return -ENOMEM;
-
- name = s;
- }
-
- if (!(other = manager_get_unit(u->meta.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->meta.load_state == UNIT_MERGED)
- assert_se(u = u->meta.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_KERNEL && c->std_output != EXEC_OUTPUT_SYSLOG)
- return 0;
-
- /* If syslog or kernel logging is requested, make sure our own
- * logging daemon is run first. */
-
- if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
- return r;
-
- if (u->meta.manager->running_as != MANAGER_SESSION)
- if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0)
- return r;
-
- return 0;
-}
-
-const char *unit_description(Unit *u) {
- assert(u);
-
- if (u->meta.description)
- return u->meta.description;
-
- return u->meta.id;
-}
-
-void unit_dump(Unit *u, FILE *f, const char *prefix) {
- char *t;
- UnitDependency d;
- Iterator i;
- char *p2;
- const char *prefix2;
- CGroupBonding *b;
- char
- timestamp1[FORMAT_TIMESTAMP_MAX],
- timestamp2[FORMAT_TIMESTAMP_MAX],
- timestamp3[FORMAT_TIMESTAMP_MAX],
- timestamp4[FORMAT_TIMESTAMP_MAX];
-
- assert(u);
- assert(u->meta.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",
- prefix, u->meta.id,
- prefix, unit_description(u),
- prefix, strna(u->meta.instance),
- prefix, unit_load_state_to_string(u->meta.load_state),
- prefix, unit_active_state_to_string(unit_active_state(u)),
- prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp)),
- prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp)),
- prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp)),
- prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp)),
- prefix, yes_no(unit_check_gc(u)));
-
- SET_FOREACH(t, u->meta.names, i)
- fprintf(f, "%s\tName: %s\n", prefix, t);
-
- if (u->meta.fragment_path)
- fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path);
-
- for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) {
- Unit *other;
-
- SET_FOREACH(other, u->meta.dependencies[d], i)
- fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id);
- }
-
- if (u->meta.load_state == UNIT_LOADED) {
- fprintf(f,
- "%s\tRecursive Stop: %s\n"
- "%s\tStop When Unneeded: %s\n",
- prefix, yes_no(u->meta.recursive_stop),
- prefix, yes_no(u->meta.stop_when_unneeded));
-
- LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
- fprintf(f, "%s\tControlGroup: %s:%s\n",
- prefix, b->controller, b->path);
-
- if (UNIT_VTABLE(u)->dump)
- UNIT_VTABLE(u)->dump(u, f, prefix2);
-
- } else if (u->meta.load_state == UNIT_MERGED)
- fprintf(f,
- "%s\tMerged into: %s\n",
- prefix, u->meta.merged_into->meta.id);
-
- if (u->meta.job)
- job_dump(u->meta.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->meta.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->meta.load_state == UNIT_STUB)
- u->meta.load_state = UNIT_LOADED;
-
- /* 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_nop(Unit *u) {
- assert(u);
-
- if (u->meta.load_state == UNIT_STUB)
- u->meta.load_state = UNIT_LOADED;
-
- return 0;
-}
-
-int unit_load(Unit *u) {
- int r;
-
- assert(u);
-
- if (u->meta.in_load_queue) {
- LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta);
- u->meta.in_load_queue = false;
- }
-
- if (u->meta.type == _UNIT_TYPE_INVALID)
- return -EINVAL;
-
- if (u->meta.load_state != UNIT_STUB)
- return 0;
-
- if (UNIT_VTABLE(u)->load)
- if ((r = UNIT_VTABLE(u)->load(u)) < 0)
- goto fail;
-
- if (u->meta.load_state == UNIT_STUB) {
- r = -ENOENT;
- goto fail;
- }
-
- assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into);
-
- unit_add_to_dbus_queue(unit_follow_merge(u));
- unit_add_to_gc_queue(u);
-
- return 0;
-
-fail:
- u->meta.load_state = UNIT_FAILED;
- unit_add_to_dbus_queue(u);
-
- log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
-
- return r;
-}
-
-/* Errors:
- * -EBADR: This unit type does not support starting.
- * -EALREADY: Unit is already started.
- * -EAGAIN: An operation is already in progress. Retry later.
- */
-int unit_start(Unit *u) {
- UnitActiveState state;
-
- assert(u);
-
- /* If this is already (being) 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 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);
- return UNIT_VTABLE(u)->start(u);
-}
-
-bool unit_can_start(Unit *u) {
- assert(u);
-
- return !!UNIT_VTABLE(u)->start;
-}
-
-/* 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;
-
- assert(u);
-
- state = unit_active_state(u);
- if (state == UNIT_INACTIVE)
- return -EALREADY;
-
- if (!UNIT_VTABLE(u)->stop)
- return -EBADR;
-
- unit_add_to_dbus_queue(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;
-
- assert(u);
-
- if (!unit_can_reload(u))
- return -EBADR;
-
- state = unit_active_state(u);
- if (unit_active_state(u) == UNIT_ACTIVE_RELOADING)
- return -EALREADY;
-
- if (unit_active_state(u) != UNIT_ACTIVE)
- return -ENOEXEC;
-
- 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_uneeded(Unit *u) {
- Iterator i;
- Unit *other;
-
- assert(u);
-
- /* If this service shall be shut down when unneeded then do
- * so. */
-
- if (!u->meta.stop_when_unneeded)
- return;
-
- if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)))
- return;
-
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- return;
-
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- return;
-
- SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- return;
-
- log_debug("Service %s is not needed anymore. Stopping.", u->meta.id);
-
- /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
- manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, 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->meta.dependencies[UNIT_REQUIRES], i)
- if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
- manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL);
-
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
- if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
- manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL);
-
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
- if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
- manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL);
-
- SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
- if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
- manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL);
-
- SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i)
- if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other)))
- manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL);
-}
-
-static void retroactively_stop_dependencies(Unit *u) {
- Iterator i;
- Unit *other;
-
- assert(u);
- assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
-
- if (u->meta.recursive_stop) {
- /* Pull down units need us recursively if enabled */
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL);
- }
-
- /* Garbage collect services that might not be needed anymore, if enabled */
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- unit_check_uneeded(other);
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- unit_check_uneeded(other);
- SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- unit_check_uneeded(other);
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- unit_check_uneeded(other);
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i)
- if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
- unit_check_uneeded(other);
-}
-
-void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
- bool unexpected = false;
- usec_t ts;
-
- 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 and the utmp code below
- * relies on that! */
-
- ts = now(CLOCK_REALTIME);
-
- if (os == UNIT_INACTIVE && ns != UNIT_INACTIVE)
- u->meta.inactive_exit_timestamp = ts;
- else if (os != UNIT_INACTIVE && ns == UNIT_INACTIVE)
- u->meta.inactive_enter_timestamp = ts;
-
- if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns))
- u->meta.active_enter_timestamp = ts;
- else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns))
- u->meta.active_exit_timestamp = ts;
-
- if (u->meta.job) {
-
- if (u->meta.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->meta.job);
-
- else {
- assert(u->meta.job->state == JOB_RUNNING);
-
- /* Let's check whether this state change
- * constitutes a finished job, or maybe
- * cotradicts a running job and hence needs to
- * invalidate jobs. */
-
- switch (u->meta.job->type) {
-
- case JOB_START:
- case JOB_VERIFY_ACTIVE:
-
- if (UNIT_IS_ACTIVE_OR_RELOADING(ns))
- job_finish_and_invalidate(u->meta.job, true);
- else if (ns != UNIT_ACTIVATING) {
- unexpected = true;
- job_finish_and_invalidate(u->meta.job, false);
- }
-
- break;
-
- case JOB_RELOAD:
- case JOB_RELOAD_OR_START:
-
- if (ns == UNIT_ACTIVE)
- job_finish_and_invalidate(u->meta.job, true);
- else if (ns != UNIT_ACTIVATING && ns != UNIT_ACTIVE_RELOADING) {
- unexpected = true;
- job_finish_and_invalidate(u->meta.job, false);
- }
-
- break;
-
- case JOB_STOP:
- case JOB_RESTART:
- case JOB_TRY_RESTART:
-
- if (ns == UNIT_INACTIVE)
- job_finish_and_invalidate(u->meta.job, true);
- else if (ns != UNIT_DEACTIVATING) {
- unexpected = true;
- job_finish_and_invalidate(u->meta.job, false);
- }
-
- break;
-
- default:
- assert_not_reached("Job type unknown");
- }
- }
- }
-
- /* If this state change happened without being requested by a
- * job, then let's retroactively start or stop dependencies */
-
- if (unexpected) {
- if (UNIT_IS_INACTIVE_OR_DEACTIVATING(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);
- }
-
- /* 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_system(u->meta.manager);
- bus_init_api(u->meta.manager);
- }
-
- if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
- /* The syslog daemon just might have become
- * available, hence try to connect to it, if
- * we aren't yet connected. */
- log_open();
-
- if (u->meta.type == UNIT_MOUNT)
- /* Another directory became available, let's
- * check if that is enough to write our utmp
- * entry. */
- manager_write_utmp_reboot(u->meta.manager);
-
- if (u->meta.type == UNIT_TARGET)
- /* A target got activated, maybe this is a runlevel? */
- manager_write_utmp_runlevel(u->meta.manager, u);
-
- } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns)) {
-
- if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE))
- /* The syslog daemon might just have
- * terminated, hence try to disconnect from
- * it. */
- log_close_syslog();
-
- /* We don't care about D-Bus here, since we'll get an
- * asynchronous notification for it anyway. */
- }
-
- /* Maybe we finished startup and are now ready for being
- * stopped because unneeded? */
- unit_check_uneeded(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->meta.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->meta.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->meta.manager->watch_pids, UINT32_TO_PTR(pid), u);
-}
-
-void unit_unwatch_pid(Unit *u, pid_t pid) {
- assert(u);
- assert(pid >= 1);
-
- hashmap_remove_value(u->meta.manager->watch_pids, UINT32_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_TIMER && w->data.unit == u));
-
- /* This will try to reuse the old timer if there is one */
-
- if (w->type == WATCH_TIMER) {
- ours = false;
- fd = w->fd;
- } else {
- ours = true;
- if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
- return -errno;
- }
-
- 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->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0)
- goto fail;
- }
-
- w->fd = fd;
- w->type = WATCH_TIMER;
- 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_TIMER && w->data.unit == u);
-
- assert_se(epoll_ctl(u->meta.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:
- return true;
-
- case JOB_STOP:
- 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_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID,
- [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID,
- [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID,
- [UNIT_CONFLICTS] = UNIT_CONFLICTS,
- [UNIT_BEFORE] = UNIT_AFTER,
- [UNIT_AFTER] = UNIT_BEFORE,
- [UNIT_REFERENCES] = UNIT_REFERENCED_BY,
- [UNIT_REFERENCED_BY] = UNIT_REFERENCES
- };
- int r, q = 0, v = 0, w = 0;
-
- assert(u);
- assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX);
- assert(inverse_table[d] != _UNIT_DEPENDENCY_INVALID);
- assert(other);
-
- /* We won't allow dependencies on ourselves. We will not
- * consider them an error however. */
- if (u == other)
- return 0;
-
- if (UNIT_VTABLE(u)->no_requires &&
- (d == UNIT_REQUIRES ||
- d == UNIT_REQUIRES_OVERRIDABLE ||
- d == UNIT_REQUISITE ||
- d == UNIT_REQUISITE_OVERRIDABLE)) {
- return -EINVAL;
- }
-
- if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0 ||
- (r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0)
- return r;
-
- if (add_reference)
- if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 ||
- (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0)
- return r;
-
- if ((q = set_put(u->meta.dependencies[d], other)) < 0)
- return q;
-
- if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) {
- r = v;
- goto fail;
- }
-
- if (add_reference) {
- if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) {
- r = w;
- goto fail;
- }
-
- if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0)
- goto fail;
- }
-
- unit_add_to_dbus_queue(u);
- return 0;
-
-fail:
- if (q > 0)
- set_remove(u->meta.dependencies[d], other);
-
- if (v > 0)
- set_remove(other->meta.dependencies[inverse_table[d]], u);
-
- if (w > 0)
- set_remove(u->meta.dependencies[UNIT_REFERENCES], other);
-
- return r;
-}
-
-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->meta.instance)
- s = unit_name_replace_instance(name, u->meta.instance);
- else {
- char *i;
-
- if (!(i = unit_name_to_prefix(u->meta.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->meta.manager, name, path, &other)) < 0)
- goto finish;
-
- r = unit_add_dependency(u, d, 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->meta.manager, name, path, &other)) < 0)
- goto finish;
-
- r = unit_add_dependency(other, d, u, add_reference);
-
-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 (!(e = bus_path_escape(u->meta.id)))
- return NULL;
-
- if (asprintf(&p, "/org/freedesktop/systemd1/unit/%s", e) < 0) {
- free(e);
- return NULL;
- }
-
- free(e);
- return p;
-}
-
-int unit_add_cgroup(Unit *u, CGroupBonding *b) {
- CGroupBonding *l;
- int r;
-
- assert(u);
- assert(b);
- assert(b->path);
-
- /* Ensure this hasn't been added yet */
- assert(!b->unit);
-
- l = hashmap_get(u->meta.manager->cgroup_bondings, b->path);
- LIST_PREPEND(CGroupBonding, by_path, l, b);
-
- if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) {
- LIST_REMOVE(CGroupBonding, by_path, l, b);
- return r;
- }
-
- LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b);
- b->unit = u;
-
- return 0;
-}
-
-static char *default_cgroup_path(Unit *u) {
- char *p;
- int r;
-
- assert(u);
-
- if (u->meta.instance) {
- char *t;
-
- if (!(t = unit_name_template(u->meta.id)))
- return NULL;
-
- r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance);
- free(t);
- } else
- r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id);
-
- return r < 0 ? NULL : p;
-}
-
-int unit_add_cgroup_from_text(Unit *u, const char *name) {
- size_t n;
- char *controller = NULL, *path = NULL;
- CGroupBonding *b = NULL;
- int r;
-
- assert(u);
- assert(name);
-
- /* Detect controller name */
- n = strcspn(name, ":");
-
- if (name[n] == 0 ||
- (name[n] == ':' && name[n+1] == 0)) {
-
- /* Only controller name, no path? */
-
- if (!(path = default_cgroup_path(u)))
- return -ENOMEM;
-
- } else {
- const char *p;
-
- /* Controller name, and path. */
- p = name+n+1;
-
- if (!path_is_absolute(p))
- return -EINVAL;
-
- if (!(path = strdup(p)))
- return -ENOMEM;
- }
-
- if (n > 0)
- controller = strndup(name, n);
- else
- controller = strdup(u->meta.manager->cgroup_controller);
-
- if (!controller) {
- r = -ENOMEM;
- goto fail;
- }
-
- if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
- r = -EEXIST;
- goto fail;
- }
-
- if (!(b = new0(CGroupBonding, 1))) {
- r = -ENOMEM;
- goto fail;
- }
-
- b->controller = controller;
- b->path = path;
- b->only_us = false;
- b->clean_up = false;
-
- if ((r = unit_add_cgroup(u, b)) < 0)
- goto fail;
-
- return 0;
-
-fail:
- free(path);
- free(controller);
- free(b);
-
- return r;
-}
-
-int unit_add_default_cgroup(Unit *u) {
- CGroupBonding *b;
- int r = -ENOMEM;
-
- assert(u);
-
- /* Adds in the default cgroup data, if it wasn't specified yet */
-
- if (unit_get_default_cgroup(u))
- return 0;
-
- if (!(b = new0(CGroupBonding, 1)))
- return -ENOMEM;
-
- if (!(b->controller = strdup(u->meta.manager->cgroup_controller)))
- goto fail;
-
- if (!(b->path = default_cgroup_path(u)))
- goto fail;
-
- b->clean_up = true;
- b->only_us = true;
-
- if ((r = unit_add_cgroup(u, b)) < 0)
- goto fail;
-
- return 0;
-
-fail:
- free(b->path);
- free(b->controller);
- free(b);
-
- return r;
-}
-
-CGroupBonding* unit_get_default_cgroup(Unit *u) {
- assert(u);
-
- return cgroup_bonding_find_list(u->meta.cgroup_bondings, u->meta.manager->cgroup_controller);
-}
-
-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->meta.id, type)))
- return -ENOMEM;
-
- assert(!unit_has_name(u, t));
-
- r = manager_load_unit(u->meta.manager, t, 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->meta.id, type)))
- return -ENOMEM;
-
- assert(!unit_has_name(u, t));
-
- found = manager_get_unit(u->meta.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->meta.id);
-}
-
-static char *specifier_prefix(char specifier, void *data, void *userdata) {
- Unit *u = userdata;
- assert(u);
-
- return unit_name_to_prefix(u->meta.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->meta.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->meta.instance)
- return unit_name_unescape(u->meta.instance);
-
- return strdup("");
-}
-
-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->meta.id },
- { 'N', specifier_prefix_and_instance, NULL },
- { 'p', specifier_prefix, NULL },
- { 'i', specifier_string, u->meta.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 */
-
- const Specifier table[] = {
- { 'n', specifier_string, u->meta.id },
- { 'N', specifier_prefix_and_instance, NULL },
- { 'p', specifier_prefix, NULL },
- { 'P', specifier_prefix_unescaped, NULL },
- { 'i', specifier_string, u->meta.instance },
- { 'I', specifier_instance_unescaped, 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:
- j--;
- while (j >= r)
- 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->meta.manager->watch_bus, name, u);
-}
-
-void unit_unwatch_bus_name(Unit *u, const char *name) {
- assert(u);
- assert(name);
-
- hashmap_remove_value(u->meta.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;
-
- /* 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[1024], *l, *v;
- size_t k;
-
- if (!fgets(line, sizeof(line), f)) {
- if (feof(f))
- return 0;
- return -errno;
- }
-
- 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 ((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->meta.manager, e, NULL, &device);
- free(e);
-
- if (r < 0)
- return r;
-
- if ((r = unit_add_dependency(u, UNIT_AFTER, device, true)) < 0)
- return r;
-
- if ((r = unit_add_dependency(u, UNIT_REQUIRES, device, true)) < 0)
- return r;
-
- if (wants)
- if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0)
- return r;
-
- return 0;
-}
-
-static const char* const unit_type_table[_UNIT_TYPE_MAX] = {
- [UNIT_SERVICE] = "service",
- [UNIT_TIMER] = "timer",
- [UNIT_SOCKET] = "socket",
- [UNIT_TARGET] = "target",
- [UNIT_DEVICE] = "device",
- [UNIT_MOUNT] = "mount",
- [UNIT_AUTOMOUNT] = "automount",
- [UNIT_SNAPSHOT] = "snapshot",
- [UNIT_SWAP] = "swap"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType);
-
-static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = {
- [UNIT_STUB] = "stub",
- [UNIT_LOADED] = "loaded",
- [UNIT_FAILED] = "failed",
- [UNIT_MERGED] = "merged"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState);
-
-static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
- [UNIT_ACTIVE] = "active",
- [UNIT_INACTIVE] = "inactive",
- [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_WANTED_BY] = "WantedBy",
- [UNIT_CONFLICTS] = "Conflicts",
- [UNIT_BEFORE] = "Before",
- [UNIT_AFTER] = "After",
- [UNIT_REFERENCES] = "References",
- [UNIT_REFERENCED_BY] = "ReferencedBy"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);
-
-static const char* const kill_mode_table[_KILL_MODE_MAX] = {
- [KILL_CONTROL_GROUP] = "control-group",
- [KILL_PROCESS_GROUP] = "process-group",
- [KILL_PROCESS] = "process",
- [KILL_NONE] = "none"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);
~ianmdlvl / elogind.git / blobdiff