From 26c0a7962e97bfc281decb3da7efa658254f2bca Mon Sep 17 00:00:00 2001
From: Benno Schulenberg <bensberg@telfort.nl>
Date: Tue, 28 Sep 2021 09:31:52 +0200
Subject: [PATCH] files: check for a fifo only when it is an existing file
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To avoid referencing an uninitialized value.

Reported-by: André Kugland <kugland@gmail.com>
  https://lists.gnu.org/archive/html/nano-devel/2021-09/msg00031.html
---
 src/files.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/files.c b/src/files.c
index a0ccfbc8..9cae4f85 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1954,7 +1954,7 @@ bool write_file(const char *name, FILE *thefile, bool tmp,
 		unlink(tempname);
 	}
 
-	if (!S_ISFIFO(st.st_mode))
+	if (!is_existing_file || !S_ISFIFO(st.st_mode))
 #endif
 	/* Ensure the data has reached the disk before reporting it as written. */
 	if (fflush(thefile) != 0 || fsync(fileno(thefile)) != 0) {