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Diffstat (limited to 'src/systemctl')
-rw-r--r--src/systemctl/systemctl.c168
1 files changed, 165 insertions, 3 deletions
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 5337561664..bb6002e8ef 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -118,6 +118,7 @@ static enum dependency {
} arg_dependency = DEPENDENCY_FORWARD;
static const char *arg_job_mode = "replace";
static UnitFileScope arg_scope = UNIT_FILE_SYSTEM;
+static bool arg_wait = false;
static bool arg_no_block = false;
static bool arg_no_legend = false;
static bool arg_no_pager = false;
@@ -2679,13 +2680,86 @@ static const char *method_to_verb(const char *method) {
return "n/a";
}
+typedef struct {
+ sd_bus_slot *match;
+ sd_event *event;
+ Set *unit_paths;
+ bool any_failed;
+} WaitContext;
+
+static void wait_context_free(WaitContext *c) {
+ c->match = sd_bus_slot_unref(c->match);
+ c->event = sd_event_unref(c->event);
+ c->unit_paths = set_free(c->unit_paths);
+}
+
+static int on_properties_changed(sd_bus_message *m, void *userdata, sd_bus_error *error) {
+ WaitContext *c = userdata;
+ const char *path;
+ int r;
+
+ path = sd_bus_message_get_path(m);
+ if (!set_contains(c->unit_paths, path))
+ return 0;
+
+ /* Check if ActiveState changed to inactive/failed */
+ /* (s interface, a{sv} changed_properties, as invalidated_properties) */
+ r = sd_bus_message_skip(m, "s");
+ if (r < 0)
+ return bus_log_parse_error(r);
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{sv}");
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {
+ const char *s;
+ bool is_failed;
+
+ r = sd_bus_message_read(m, "s", &s);
+ if (r < 0)
+ return bus_log_parse_error(r);
+ if (streq(s, "ActiveState")) {
+ r = sd_bus_message_enter_container(m, SD_BUS_TYPE_VARIANT, "s");
+ if (r < 0)
+ return bus_log_parse_error(r);
+ r = sd_bus_message_read(m, "s", &s);
+ if (r < 0)
+ return bus_log_parse_error(r);
+ is_failed = streq(s, "failed");
+ if (streq(s, "inactive") || is_failed) {
+ log_debug("%s became %s, dropping from --wait tracking", path, s);
+ set_remove(c->unit_paths, path);
+ c->any_failed |= is_failed;
+ } else
+ log_debug("ActiveState on %s changed to %s", path, s);
+ break; /* no need to dissect the rest of the message */
+ } else {
+ /* other property */
+ r = sd_bus_message_skip(m, "v");
+ if (r < 0)
+ return bus_log_parse_error(r);
+ }
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return bus_log_parse_error(r);
+ }
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ if (set_isempty(c->unit_paths))
+ sd_event_exit(c->event, EXIT_SUCCESS);
+
+ return 0;
+}
+
static int start_unit_one(
sd_bus *bus,
const char *method,
const char *name,
const char *mode,
sd_bus_error *error,
- BusWaitForJobs *w) {
+ BusWaitForJobs *w,
+ WaitContext *wait_context) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
const char *path;
@@ -2696,6 +2770,40 @@ static int start_unit_one(
assert(mode);
assert(error);
+ if (wait_context) {
+ _cleanup_free_ char *unit_path = NULL;
+ const char* mt;
+
+ log_debug("Watching for property changes of %s", name);
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "RefUnit",
+ error,
+ NULL,
+ "s", name);
+ if (r < 0)
+ return log_error_errno(r, "Failed to RefUnit %s: %s", name, bus_error_message(error, r));
+
+ unit_path = unit_dbus_path_from_name(name);
+ if (!unit_path)
+ return log_oom();
+
+ r = set_put_strdup(wait_context->unit_paths, unit_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add unit path %s to set: %m", unit_path);
+
+ mt = strjoina("type='signal',"
+ "interface='org.freedesktop.DBus.Properties',"
+ "path='", unit_path, "',"
+ "member='PropertiesChanged'");
+ r = sd_bus_add_match(bus, &wait_context->match, mt, on_properties_changed, wait_context);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add match for PropertiesChanged signal: %m");
+ }
+
log_debug("Calling manager for %s on %s, %s", method, name, mode);
r = sd_bus_call_method(
@@ -2841,10 +2949,18 @@ static int start_unit(int argc, char *argv[], void *userdata) {
const char *method, *mode, *one_name, *suffix = NULL;
_cleanup_strv_free_ char **names = NULL;
sd_bus *bus;
+ _cleanup_(wait_context_free) WaitContext wait_context = {};
char **name;
int r = 0;
- r = acquire_bus(BUS_MANAGER, &bus);
+ if (arg_wait && !strstr(argv[0], "start")) {
+ log_error("--wait may only be used with a command that starts units.");
+ return -EINVAL;
+ }
+
+ /* we cannot do sender tracking on the private bus, so we need the full
+ * one for RefUnit to implement --wait */
+ r = acquire_bus(arg_wait ? BUS_FULL : BUS_MANAGER, &bus);
if (r < 0)
return r;
@@ -2888,11 +3004,36 @@ static int start_unit(int argc, char *argv[], void *userdata) {
return log_error_errno(r, "Could not watch jobs: %m");
}
+ if (arg_wait) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+ wait_context.unit_paths = set_new(&string_hash_ops);
+ if (!wait_context.unit_paths)
+ return log_oom();
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.systemd1.Manager",
+ "Subscribe",
+ &error,
+ NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to enable subscription: %s", bus_error_message(&error, r));
+ r = sd_event_default(&wait_context.event);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate event loop: %m");
+ r = sd_bus_attach_event(bus, wait_context.event, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to attach bus to event loop: %m");
+ }
+
STRV_FOREACH(name, names) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int q;
- q = start_unit_one(bus, method, *name, mode, &error, w);
+ q = start_unit_one(bus, method, *name, mode, &error, w, arg_wait ? &wait_context : NULL);
if (r >= 0 && q < 0)
r = translate_bus_error_to_exit_status(q, &error);
}
@@ -2924,6 +3065,15 @@ static int start_unit(int argc, char *argv[], void *userdata) {
check_triggering_units(bus, *name);
}
+ if (r >= 0 && arg_wait) {
+ int q;
+ q = sd_event_loop(wait_context.event);
+ if (q < 0)
+ return log_error_errno(q, "Failed to run event loop: %m");
+ if (wait_context.any_failed)
+ r = EXIT_FAILURE;
+ }
+
return r;
}
@@ -6587,6 +6737,7 @@ static void systemctl_help(void) {
" -s --signal=SIGNAL Which signal to send\n"
" --now Start or stop unit in addition to enabling or disabling it\n"
" -q --quiet Suppress output\n"
+ " --wait For (re)start, wait until service stopped again\n"
" --no-block Do not wait until operation finished\n"
" --no-wall Don't send wall message before halt/power-off/reboot\n"
" --no-reload Don't reload daemon after en-/dis-abling unit files\n"
@@ -6857,6 +7008,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
ARG_FIRMWARE_SETUP,
ARG_NOW,
ARG_MESSAGE,
+ ARG_WAIT,
};
static const struct option options[] = {
@@ -6880,6 +7032,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
{ "user", no_argument, NULL, ARG_USER },
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "global", no_argument, NULL, ARG_GLOBAL },
+ { "wait", no_argument, NULL, ARG_WAIT },
{ "no-block", no_argument, NULL, ARG_NO_BLOCK },
{ "no-legend", no_argument, NULL, ARG_NO_LEGEND },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
@@ -7060,6 +7213,10 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
arg_scope = UNIT_FILE_GLOBAL;
break;
+ case ARG_WAIT:
+ arg_wait = true;
+ break;
+
case ARG_NO_BLOCK:
arg_no_block = true;
break;
@@ -7235,6 +7392,11 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
return -EINVAL;
}
+ if (arg_wait && arg_no_block) {
+ log_error("--wait may not be combined with --no-block.");
+ return -EINVAL;
+ }
+
return 1;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-09 18:53:29 +0000