From 58fd4c5c0140f6636227ca7acbb149ab0c2509b9 Mon Sep 17 00:00:00 2001
From: Darren Tucker <dtucker@dtucker.net>
Date: Mon, 5 Mar 2018 19:28:08 +1100
Subject: Check for and work around buggy fflush(NULL).

Some really old platforms (eg SunOS4) segfault on fflush(NULL) so check
for and work around.  With klausz at haus-gisela.de.
---
 openbsd-compat/bsd-misc.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'openbsd-compat/bsd-misc.c')

diff --git a/openbsd-compat/bsd-misc.c b/openbsd-compat/bsd-misc.c
index f7187daf..3daf6107 100644
--- a/openbsd-compat/bsd-misc.c
+++ b/openbsd-compat/bsd-misc.c
@@ -308,3 +308,19 @@ getsid(pid_t pid)
 }
 #endif
 
+#ifdef FFLUSH_NULL_BUG
+#undef fflush
+int _ssh_compat_fflush(FILE *f)
+{
+	int r1, r2, r3;
+
+	if (f == NULL) {
+		r2 = fflush(stdout);
+		r3 = fflush(stderr);
+		if (r1 == -1 || r2 == -1 || r3 == -1)
+			return -1;
+		return 0;
+	}
+	return fflush(f);
+}
+#endif
-- 
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