X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=unit.c;h=a14e18ef5b18d05d9c11437b8154cd5c9d7fe006;hp=bd4272f6ddc92de9f95786832350e4b08f1692fd;hb=47be870bd83fb3719dffc3ee9348a409ab762a14;hpb=f94ea366d38fed424200b748cb042ca44f8c8d50;ds=sidebyside
diff --git a/unit.c b/unit.c
index bd4272f6d..a14e18ef5 100644
--- a/unit.c
+++ b/unit.c
@@ -1,5 +1,24 @@
/*-*- 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 .
+***/
+
#include
#include
#include
@@ -329,55 +348,32 @@ const char *unit_description(Unit *u) {
void unit_dump(Unit *u, FILE *f, const char *prefix) {
- static const char* const load_state_table[_UNIT_LOAD_STATE_MAX] = {
- [UNIT_STUB] = "stub",
- [UNIT_LOADED] = "loaded",
- [UNIT_FAILED] = "failed"
- };
-
- static const char* const active_state_table[_UNIT_ACTIVE_STATE_MAX] = {
- [UNIT_ACTIVE] = "active",
- [UNIT_INACTIVE] = "inactive",
- [UNIT_ACTIVATING] = "activating",
- [UNIT_DEACTIVATING] = "deactivating"
- };
-
- static const char* const dependency_table[_UNIT_DEPENDENCY_MAX] = {
- [UNIT_REQUIRES] = "Requires",
- [UNIT_SOFT_REQUIRES] = "SoftRequires",
- [UNIT_WANTS] = "Wants",
- [UNIT_REQUISITE] = "Requisite",
- [UNIT_SOFT_REQUISITE] = "SoftRequisite",
- [UNIT_REQUIRED_BY] = "RequiredBy",
- [UNIT_SOFT_REQUIRED_BY] = "SoftRequiredBy",
- [UNIT_WANTED_BY] = "WantedBy",
- [UNIT_CONFLICTS] = "Conflicts",
- [UNIT_BEFORE] = "Before",
- [UNIT_AFTER] = "After",
- };
-
char *t;
UnitDependency d;
Iterator i;
- char *prefix2;
+ char *p2;
+ const char *prefix2;
assert(u);
if (!prefix)
prefix = "";
- prefix2 = strappend(prefix, "\t");
- if (!prefix2)
- prefix2 = "";
+ p2 = strappend(prefix, "\t");
+ prefix2 = p2 ? p2 : prefix;
fprintf(f,
"%sâ Unit %s:\n"
"%s\tDescription: %s\n"
"%s\tUnit Load State: %s\n"
- "%s\tUnit Active State: %s\n",
+ "%s\tUnit Active State: %s\n"
+ "%s\tRecursive Stop: %s\n"
+ "%s\tStop When Unneeded: %s\n",
prefix, unit_id(u),
prefix, unit_description(u),
- prefix, load_state_table[u->meta.load_state],
- prefix, active_state_table[unit_active_state(u)]);
+ prefix, unit_load_state_to_string(u->meta.load_state),
+ prefix, unit_active_state_to_string(unit_active_state(u)),
+ prefix, yes_no(u->meta.recursive_stop),
+ prefix, yes_no(u->meta.stop_when_unneeded));
if (u->meta.load_path)
fprintf(f, "%s\tLoad Path: %s\n", prefix, u->meta.load_path);
@@ -392,7 +388,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
continue;
SET_FOREACH(other, u->meta.dependencies[d], i)
- fprintf(f, "%s\t%s: %s\n", prefix, dependency_table[d], unit_id(other));
+ fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), unit_id(other));
}
if (UNIT_VTABLE(u)->dump)
@@ -401,7 +397,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
if (u->meta.job)
job_dump(u->meta.job, f, prefix2);
- free(prefix2);
+ free(p2);
}
/* Common implementation for multiple backends */
@@ -538,6 +534,39 @@ bool unit_can_reload(Unit *u) {
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_SOFT_REQUIRED_BY], 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.", unit_id(u));
+
+ /* 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;
@@ -573,9 +602,29 @@ static void retroactively_stop_dependencies(Unit *u) {
assert(u);
assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u)));
- SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i)
+ 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)))
- manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL);
+ unit_check_uneeded(other);
+ SET_FOREACH(other, u->meta.dependencies[UNIT_SOFT_REQUIRES], 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_SOFT_REQUISITE], i)
+ if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other)))
+ unit_check_uneeded(other);
}
void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
@@ -665,6 +714,10 @@ void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) {
retroactively_start_dependencies(u);
else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns))
retroactively_stop_dependencies(u);
+
+ /* Maybe we finished startup and are now ready for being
+ * stopped because unneeded? */
+ unit_check_uneeded(u);
}
int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
@@ -673,7 +726,7 @@ int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
assert(u);
assert(fd >= 0);
assert(w);
- assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->unit == u));
+ assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u));
zero(ev);
ev.data.ptr = w;
@@ -687,7 +740,7 @@ int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) {
w->fd = fd;
w->type = WATCH_FD;
- w->unit = u;
+ w->data.unit = u;
return 0;
}
@@ -699,12 +752,13 @@ void unit_unwatch_fd(Unit *u, Watch *w) {
if (w->type == WATCH_INVALID)
return;
- assert(w->type == WATCH_FD && w->unit == u);
+ 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->unit = NULL;
+ w->data.unit = NULL;
}
int unit_watch_pid(Unit *u, pid_t pid) {
@@ -728,7 +782,7 @@ int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
assert(u);
assert(w);
- assert(w->type == WATCH_INVALID || (w->type == WATCH_TIMER && w->unit == u));
+ 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 */
@@ -772,13 +826,13 @@ int unit_watch_timer(Unit *u, usec_t delay, Watch *w) {
w->fd = fd;
w->type = WATCH_TIMER;
- w->unit = u;
+ w->data.unit = u;
return 0;
fail:
if (ours)
- assert_se(close_nointr(fd) == 0);
+ close_nointr_nofail(fd);
return -errno;
}
@@ -790,14 +844,14 @@ void unit_unwatch_timer(Unit *u, Watch *w) {
if (w->type == WATCH_INVALID)
return;
- assert(w->type == WATCH_TIMER && w->unit == u);
+ 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);
assert_se(close_nointr(w->fd) == 0);
w->fd = -1;
w->type = WATCH_INVALID;
- w->unit = NULL;
+ w->data.unit = NULL;
}
bool unit_job_is_applicable(Unit *u, JobType j) {
@@ -969,3 +1023,66 @@ char *unit_name_escape_path(const char *prefix, const char *path, const char *su
return r;
}
+
+char *unit_dbus_path(Unit *u) {
+ char *p, *e;
+
+ assert(u);
+
+ if (!(e = bus_path_escape(unit_id(u))))
+ return NULL;
+
+ if (asprintf(&p, "/org/freedesktop/systemd1/unit/%s", e) < 0) {
+ free(e);
+ return NULL;
+ }
+
+ free(e);
+ return p;
+}
+
+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"
+};
+
+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"
+};
+
+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_SOFT_REQUIRES] = "SoftRequires",
+ [UNIT_WANTS] = "Wants",
+ [UNIT_REQUISITE] = "Requisite",
+ [UNIT_SOFT_REQUISITE] = "SoftRequisite",
+ [UNIT_REQUIRED_BY] = "RequiredBy",
+ [UNIT_SOFT_REQUIRED_BY] = "SoftRequiredBy",
+ [UNIT_WANTED_BY] = "WantedBy",
+ [UNIT_CONFLICTS] = "Conflicts",
+ [UNIT_BEFORE] = "Before",
+ [UNIT_AFTER] = "After",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency);