From 66c5d9413ec0bd263eec0e1239b5a28847119134 Mon Sep 17 00:00:00 2001
From: Timothy Stack <timothyshanestack@gmail.com>
Date: Tue, 31 Mar 2015 13:00:10 -0700
Subject: [PATCH] fix piping lnav

---
 src/piper_proc.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/piper_proc.cc b/src/piper_proc.cc
index 1e88e243..206f62a0 100644
--- a/src/piper_proc.cc
+++ b/src/piper_proc.cc
@@ -111,7 +111,9 @@ piper_proc::piper_proc(int pipefd, bool timestamp, const char *filename)
         int nullfd;
 
         nullfd = open("/dev/null", O_RDWR);
-        dup2(nullfd, STDIN_FILENO);
+        if (pipefd != STDIN_FILENO) {
+            dup2(nullfd, STDIN_FILENO);
+        }
         dup2(nullfd, STDOUT_FILENO);
         for (int fd_to_close = 0; fd_to_close < 1024; fd_to_close++) {
             int flags;