From 5532bedf8ef456f02fdec62d46bc1be65cdfde30 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 28 Apr 2015 12:21:31 +0200
Subject: [PATCH] run: synchronously wait until the scope unit we create is
started
Otherwise it might happen that by the time PID 1 adds our process to the
scope unit the process might already have died, if the process is
short-running (such as an invocation to /bin/true).
https://bugs.freedesktop.org/show_bug.cgi?id=86520
Cherry-picked from: de158ed22db60e3a6654557fa4aa72f7248550af
Resolves: #1272368
---
src/libsystemd/sd-bus/bus-util.c | 10 ++++++++
src/libsystemd/sd-bus/bus-util.h | 1 +
src/run/run.c | 42 ++++++++++++++++++++++++++------
3 files changed, 46 insertions(+), 7 deletions(-)
diff --git a/src/libsystemd/sd-bus/bus-util.c b/src/libsystemd/sd-bus/bus-util.c
index e48abf55a3..6d56150825 100644
--- a/src/libsystemd/sd-bus/bus-util.c
+++ b/src/libsystemd/sd-bus/bus-util.c
@@ -1854,6 +1854,16 @@ int bus_wait_for_jobs_add(BusWaitForJobs *d, const char *path) {
return set_put_strdup(d->jobs, path);
}
+int bus_wait_for_jobs_one(BusWaitForJobs *d, const char *path, bool quiet) {
+ int r;
+
+ r = bus_wait_for_jobs_add(d, path);
+ if (r < 0)
+ return log_oom();
+
+ return bus_wait_for_jobs(d, quiet);
+}
+
int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, UnitFileChange **changes, unsigned *n_changes) {
const char *type, *path, *source;
int r;
diff --git a/src/libsystemd/sd-bus/bus-util.h b/src/libsystemd/sd-bus/bus-util.h
index 21db982280..8c8846c6ee 100644
--- a/src/libsystemd/sd-bus/bus-util.h
+++ b/src/libsystemd/sd-bus/bus-util.h
@@ -209,6 +209,7 @@ int bus_wait_for_jobs_new(sd_bus *bus, BusWaitForJobs **ret);
void bus_wait_for_jobs_free(BusWaitForJobs *d);
int bus_wait_for_jobs_add(BusWaitForJobs *d, const char *path);
int bus_wait_for_jobs(BusWaitForJobs *d, bool quiet);
+int bus_wait_for_jobs_one(BusWaitForJobs *d, const char *path, bool quiet);
DEFINE_TRIVIAL_CLEANUP_FUNC(BusWaitForJobs*, bus_wait_for_jobs_free);
diff --git a/src/run/run.c b/src/run/run.c
index 0e5bde23d2..dd1338f3b4 100644
--- a/src/run/run.c
+++ b/src/run/run.c
@@ -806,14 +806,20 @@ static int start_transient_scope(
char **argv) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
+ _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
_cleanup_strv_free_ char **env = NULL, **user_env = NULL;
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
_cleanup_free_ char *scope = NULL;
+ const char *object = NULL;
int r;
assert(bus);
assert(argv);
+ r = bus_wait_for_jobs_new(bus, &w);
+ if (r < 0)
+ return log_oom();
+
if (arg_unit) {
scope = unit_name_mangle_with_suffix(arg_unit, MANGLE_NOGLOB, ".scope");
if (!scope)
@@ -854,7 +860,7 @@ static int start_transient_scope(
if (r < 0)
return bus_log_create_error(r);
- r = sd_bus_call(bus, m, 0, &error, NULL);
+ r = sd_bus_call(bus, m, 0, &error, &reply);
if (r < 0) {
log_error("Failed to start transient scope unit: %s", bus_error_message(&error, -r));
return r;
@@ -914,8 +920,16 @@ static int start_transient_scope(
if (!env)
return log_oom();
+ r = sd_bus_message_read(reply, "o", &object);
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ r = bus_wait_for_jobs_one(w, object, arg_quiet);
+ if (r < 0)
+ return r;
+
if (!arg_quiet)
- log_info("Running as unit %s.", scope);
+ log_info("Running scope as unit %s.", scope);
execvpe(argv[0], argv, env);
@@ -927,13 +941,19 @@ static int start_transient_timer(
char **argv) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
+ _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
_cleanup_free_ char *timer = NULL, *service = NULL;
+ const char *object = NULL;
int r;
assert(bus);
assert(argv);
+ r = bus_wait_for_jobs_new(bus, &w);
+ if (r < 0)
+ return log_oom();
+
if (arg_unit) {
switch(unit_name_to_type(arg_unit)) {
@@ -1034,15 +1054,23 @@ static int start_transient_timer(
if (r < 0)
return bus_log_create_error(r);
- r = sd_bus_call(bus, m, 0, &error, NULL);
+ r = sd_bus_call(bus, m, 0, &error, &reply);
if (r < 0) {
log_error("Failed to start transient timer unit: %s", bus_error_message(&error, -r));
return r;
}
- log_info("Running as unit %s.", timer);
+ r = sd_bus_message_read(reply, "o", &object);
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ r = bus_wait_for_jobs_one(w, object, arg_quiet);
+ if (r < 0)
+ return r;
+
+ log_info("Running timer as unit %s.", timer);
if (argv[0])
- log_info("Will run as unit %s.", service);
+ log_info("Will run service as unit %s.", service);
return 0;
}