[systemd-devel] [PATCH v2] log: be more verbose if dbus job fails
Michal Sekletar
msekleta at redhat.com
Thu Apr 9 06:20:02 PDT 2015
Users might have hard time figuring out why exactly their systemctl request
failed. If dbus job fails try to figure out more details about failure by
examining Result property of the service.
https://bugzilla.redhat.com/show_bug.cgi?id=1016680
---
src/libsystemd/sd-bus/bus-util.c | 41 +++++++++++++++++++---
src/shared/log.c | 76 ++++++++++++++++++++++++++++++++++++++++
src/shared/log.h | 2 ++
3 files changed, 114 insertions(+), 5 deletions(-)
diff --git a/src/libsystemd/sd-bus/bus-util.c b/src/libsystemd/sd-bus/bus-util.c
index 6498769..bb4c993 100644
--- a/src/libsystemd/sd-bus/bus-util.c
+++ b/src/libsystemd/sd-bus/bus-util.c
@@ -30,6 +30,7 @@
#include "path-util.h"
#include "missing.h"
#include "set.h"
+#include "unit-name.h"
#include "sd-bus.h"
#include "bus-error.h"
@@ -1716,6 +1717,35 @@ static int bus_process_wait(sd_bus *bus) {
}
}
+static int bus_job_get_service_result(BusWaitForJobs *d, char **result) {
+ int r = 0;
+ _cleanup_free_ char *dbus_path = NULL, *p = NULL;
+
+ assert(d);
+ assert(d->result);
+ assert(d->name);
+ assert(result);
+
+ dbus_path = unit_dbus_path_from_name(d->name);
+ if (!dbus_path)
+ return -ENOMEM;
+
+ r = sd_bus_get_property_string(d->bus,
+ "org.freedesktop.systemd1",
+ dbus_path,
+ "org.freedesktop.systemd1.Service",
+ "Result",
+ NULL,
+ &p);
+ if (r < 0)
+ return r;
+
+ *result = p;
+ p = NULL;
+
+ return 0;
+}
+
static int check_wait_response(BusWaitForJobs *d, bool quiet) {
int r = 0;
@@ -1736,13 +1766,14 @@ static int check_wait_response(BusWaitForJobs *d, bool quiet) {
log_error("Operation on or unit type of %s not supported on this system.", strna(d->name));
else if (!streq(d->result, "done") && !streq(d->result, "skipped")) {
if (d->name) {
- bool quotes;
+ int q;
+ _cleanup_free_ char *result = NULL;
- quotes = chars_intersect(d->name, SHELL_NEED_QUOTES);
+ q = bus_job_get_service_result(d, &result);
+ if (q < 0)
+ log_debug_errno(q, "Failed to get Result property of service %s: %m", d->name);
- log_error("Job for %s failed. See \"systemctl status %s%s%s\" and \"journalctl -xe\" for details.",
- d->name,
- quotes ? "'" : "", d->name, quotes ? "'" : "");
+ log_job_error_with_service_result(d->name, result);
} else
log_error("Job failed. See \"journalctl -xe\" for details.");
}
diff --git a/src/shared/log.c b/src/shared/log.c
index 646a1d6..3219756 100644
--- a/src/shared/log.c
+++ b/src/shared/log.c
@@ -1061,3 +1061,79 @@ void log_received_signal(int level, const struct signalfd_siginfo *si) {
void log_set_upgrade_syslog_to_journal(bool b) {
upgrade_syslog_to_journal = b;
}
+
+typedef enum ServiceResult {
+ SERVICE_SUCCESS,
+ SERVICE_FAILURE_RESOURCES,
+ SERVICE_FAILURE_TIMEOUT,
+ SERVICE_FAILURE_EXIT_CODE,
+ SERVICE_FAILURE_SIGNAL,
+ SERVICE_FAILURE_CORE_DUMP,
+ SERVICE_FAILURE_WATCHDOG,
+ SERVICE_FAILURE_START_LIMIT,
+ _SERVICE_RESULT_MAX,
+ _SERVICE_RESULT_INVALID = -1
+} ServiceResult;
+
+static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
+ [SERVICE_SUCCESS] = "success",
+ [SERVICE_FAILURE_RESOURCES] = "resources",
+ [SERVICE_FAILURE_TIMEOUT] = "timeout",
+ [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
+ [SERVICE_FAILURE_SIGNAL] = "signal",
+ [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
+ [SERVICE_FAILURE_WATCHDOG] = "watchdog",
+ [SERVICE_FAILURE_START_LIMIT] = "start-limit"
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(service_result, ServiceResult);
+
+static const char* const service_result_error_message_table[_SERVICE_RESULT_MAX] = {
+ [SERVICE_FAILURE_RESOURCES] = "configured resource limit was exceeded",
+ [SERVICE_FAILURE_TIMEOUT] = "start timeout was exceeded",
+ [SERVICE_FAILURE_EXIT_CODE] = "ExecStart process exited with error code",
+ [SERVICE_FAILURE_SIGNAL] = "fatal signal was delivered to ExecStart process",
+ [SERVICE_FAILURE_CORE_DUMP] = "fatal signal was delivered to ExecStart process. Core dumped",
+ [SERVICE_FAILURE_WATCHDOG] = "service failed to sent watchdog ping",
+ [SERVICE_FAILURE_START_LIMIT] = "start of the service was attempted too often too quickly",
+};
+
+void log_job_error_with_service_result(const char* service, const char *result) {
+ bool quotes;
+ _cleanup_free_ char *stream_buffer = NULL;
+ _cleanup_fclose_ FILE *stream = NULL;
+ char *service_maybe_quoted = NULL;
+ size_t size;
+ ServiceResult r;
+
+ assert(service);
+ assert(result);
+
+ quotes = chars_intersect(service, SHELL_NEED_QUOTES);
+
+ service_maybe_quoted = alloca(strlen(service) + 3);
+ sprintf(service_maybe_quoted, "%s%s%s", quotes ? "'" : "", service, quotes ? "'" : "");
+
+ stream = open_memstream(&stream_buffer, &size);
+ if (!stream)
+ return;
+
+ r = service_result_from_string(result);
+
+ assert(r > _SERVICE_RESULT_INVALID && r < _SERVICE_RESULT_MAX);
+
+ fprintf(stream, "Job for %s failed because %s. See \"systemctl status %s\" and \"journalctl -xe\" for details.\n",
+ service,
+ service_result_error_message_table[r],
+ service_maybe_quoted);
+
+ /* For some results maybe additional explanation is required */
+ if (streq_ptr(result, "start-limit"))
+ fprintf(stream, "To force a start please invoke \"systemctl reset-failed %s\" followed by \"systemctl start %s\" again.",
+ service_maybe_quoted,
+ service_maybe_quoted);
+
+ fflush(stream);
+
+ log_error("%s", stream_buffer);
+}
diff --git a/src/shared/log.h b/src/shared/log.h
index d6061c0..1627a1c 100644
--- a/src/shared/log.h
+++ b/src/shared/log.h
@@ -209,3 +209,5 @@ LogTarget log_target_from_string(const char *s) _pure_;
void log_received_signal(int level, const struct signalfd_siginfo *si);
void log_set_upgrade_syslog_to_journal(bool b);
+
+void log_job_error_with_service_result(const char* service, const char *result);
--
2.3.4
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