From f5702b311865a7ef671b789b0f2207bd171c7234 Mon Sep 17 00:00:00 2001
From: wpk <wpk@isc.org>
Date: Thu, 29 Dec 2016 13:44:19 +0100
Subject: [PATCH] Add support for '-' as a filename for stdin/stdout

---
 fstrm/file.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fstrm/file.c b/fstrm/file.c
index 5a17c0957..6c6d11dc6 100644
--- a/fstrm/file.c
+++ b/fstrm/file.c
@@ -55,7 +55,10 @@ fstrm__file_op_open(void *obj)
 {
 	struct fstrm__file *f = obj;
 	if (f->fp == NULL && f->file_path != NULL) {
-		f->fp = fopen(f->file_path, f->file_mode);
+		if (!strcmp(f->file_path, "-"))
+			f->fp = f->file_mode[0] == 'r' ? stdin : stdout;
+		else
+			f->fp = fopen(f->file_path, f->file_mode);
 		if (f->fp == NULL)
 			return fstrm_res_failure;
 		return fstrm_res_success;