run: don't wait for start job to complete when running interactively anyway

Otherwise we'd not read the services input while waiting for the job to
wait, and there's no point in waiting for the job anyway if we wait for
the unit to stop ultimately.

Fixes: #15395

1 files changed, 5 insertions, 1 deletions

diff --git a/src/run/run.c b/src/run/run.c
index 6076eabe92..ea49d5dab5 100644
--- a/src/run/run.c
+++ b/src/run/run.c
@@ -1144,7 +1144,11 @@ static int start_transient_service(
                         assert_not_reached("Can't allocate tty via ssh");
         }
 
-        if (!arg_no_block) {
+        /* Optionally, wait for the start job to complete. If we are supposed to read the service's stdin
+         * lets skip this however, because we should start that already when the start job is running, and
+         * there's little point in waiting for the start job to complete in that case anyway, as we'll wait
+         * for EOF anyway, which is going to be much later. */
+        if (!arg_no_block && arg_stdio == ARG_STDIO_NONE) {
                 r = bus_wait_for_jobs_new(bus, &w);
                 if (r < 0)
                         return log_error_errno(r, "Could not watch jobs: %m");