Use Finished instead of Started for Type=oneshot services (#14851)

UnitStatusMessageFormats.finished_job, if present,
will be called with the same arguments as
job_get_done_status_message_format() to provide a format string
appropriate for the context

This commit replaces "Started" with "Finished" for started oneshot
units, as mentioned in the referenced issue

Closes #2458. 

3 files changed, 24 insertions, 3 deletions

diff --git a/src/core/job.c b/src/core/job.c
index c45171cea7..9fe30359df 100644
--- a/src/core/job.c
+++ b/src/core/job.c
@@ -797,9 +797,15 @@ _pure_ static const char *job_get_done_status_message_format(Unit *u, JobType t,
         assert(t < _JOB_TYPE_MAX);
 
         if (IN_SET(t, JOB_START, JOB_STOP, JOB_RESTART)) {
+                const UnitStatusMessageFormats *formats = &UNIT_VTABLE(u)->status_message_formats;
+                if (formats->finished_job) {
+                        format = formats->finished_job(u, t, result);
+                        if (format)
+                                return format;
+                }
                 format = t == JOB_START ?
-                        UNIT_VTABLE(u)->status_message_formats.finished_start_job[result] :
-                        UNIT_VTABLE(u)->status_message_formats.finished_stop_job[result];
+                        formats->finished_start_job[result] :
+                        formats->finished_stop_job[result];
                 if (format)
                         return format;
         }
diff --git a/src/core/service.c b/src/core/service.c
index c3f9fb4703..17f27a4abc 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -4308,6 +4308,18 @@ static int service_can_clean(Unit *u, ExecCleanMask *ret) {
         return exec_context_get_clean_mask(&s->exec_context, ret);
 }
 
+static const char *service_finished_job(Unit *u, JobType t, JobResult result) {
+        if (t == JOB_START && result == JOB_DONE) {
+                Service *s = SERVICE(u);
+
+                if (s->type == SERVICE_ONESHOT)
+                        return "Finished %s.";
+        }
+
+        /* Fall back to generic */
+        return NULL;
+}
+
 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
         [SERVICE_RESTART_NO] = "no",
         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
@@ -4455,7 +4467,6 @@ const UnitVTable service_vtable = {
                         [1] = "Stopping %s...",
                 },
                 .finished_start_job = {
-                        [JOB_DONE]       = "Started %s.",
                         [JOB_FAILED]     = "Failed to start %s.",
                         [JOB_SKIPPED]    = "Skipped %s.",
                 },
@@ -4463,5 +4474,6 @@ const UnitVTable service_vtable = {
                         [JOB_DONE]       = "Stopped %s.",
                         [JOB_FAILED]     = "Stopped (with error) %s.",
                 },
+                .finished_job = service_finished_job,
         },
 };
diff --git a/src/core/unit.h b/src/core/unit.h
index 20d78971df..2e103f7ab2 100644
--- a/src/core/unit.h
+++ b/src/core/unit.h
@@ -382,6 +382,9 @@ typedef struct UnitStatusMessageFormats {
         const char *starting_stopping[2];
         const char *finished_start_job[_JOB_RESULT_MAX];
         const char *finished_stop_job[_JOB_RESULT_MAX];
+        /* If this entry is present, it'll be called to provide a context-dependent format string,
+         * or NULL to fall back to finished_{start,stop}_job; if those are NULL too, fall back to generic. */
+        const char *(*finished_job)(Unit *u, JobType t, JobResult result);
 } UnitStatusMessageFormats;
 
 /* Flags used when writing drop-in files or transient unit files */