log, passt: Keep printing to stderr when passt is running in foreground2024_08_06.ee36266

There are two cases where we want to stop printing to stderr: if it's
closed, and if pasta spawned a shell (and --debug wasn't given).

But if passt is running in foreground, we currently stop to report any
message, even error messages, once we're ready, as reported by
Laurent, because we set the log_runtime flag, which we use to indicate
we're ready, regardless of whether we're running in foreground or not.

Turn that flag (back) to log_stderr, and set it only when we really
want to stop printing to stderr.

Reported-by: Laurent Vivier <lvivier@redhat.com>
Fixes: afd9cdc9bb48 ("log, passt: Always print to stderr before initialisation is complete")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/passt.c b/passt.c
index 6401730..ea5bece 100644
--- a/passt.c
+++ b/passt.c
@@ -290,15 +290,17 @@ int main(int argc, char **argv)
 	if (isolate_prefork(&c))
 		die("Failed to sandbox process, exiting");
 
-	if (!c.foreground)
+	if (!c.foreground) {
 		__daemon(c.pidfile_fd, devnull_fd);
-	else
+		log_stderr = false;
+	} else {
 		pidfile_write(c.pidfile_fd, getpid());
+	}
 
-	log_runtime = true;
-
-	if (pasta_child_pid)
+	if (pasta_child_pid) {
 		kill(pasta_child_pid, SIGUSR1);
+		log_stderr = false;
+	}
 
 	isolate_postfork(&c);