safekeeper: correctly handle signals (#7167)

errno is not preserved in the signal handler. This pull request fixes it. Maybe related: #6969, but does not fix the flaky test problem. Signed-off-by: Alex Chi Z <chi@neon.tech>
neondatabase · Mar 20, 2024 · 55c4ef4 · 55c4ef4 · github-actions · Mar 20, 2024
1 parent 5f0d9f2
commit 55c4ef4
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/pgxn/neon/walproposer_pg.c b/pgxn/neon/walproposer_pg.c
@@ -549,9 +549,10 @@ walprop_pg_init_standalone_sync_safekeepers(void)
 static void
 walprop_sigusr2(SIGNAL_ARGS)
 {
+	int			save_errno = errno;
 	got_SIGUSR2 = true;
-
 	SetLatch(MyLatch);
+	errno = save_errno;
 }
 
 static void