From cf59a8a4fe8dd83a069737ff32f1f211f352036c Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Wed, 7 Dec 2016 12:39:24 -0500
Subject: [PATCH] Restore psql's SIGPIPE setting if popen() fails.

Ancient oversight in PageOutput(): if popen() fails, we'd better reset
the SIGPIPE handler before returning stdout, because ClosePager() won't.
Noticed while fixing the empty-PAGER issue.
---
 src/bin/psql/print.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/bin/psql/print.c b/src/bin/psql/print.c
index 63514e342eb..cc8cd1140c7 100644
--- a/src/bin/psql/print.c
+++ b/src/bin/psql/print.c
@@ -2220,6 +2220,10 @@ PageOutput(int lines, unsigned short int pager)
 			pagerpipe = popen(pagerprog, "w");
 			if (pagerpipe)
 				return pagerpipe;
+			/* if popen fails, silently proceed without pager */
+#ifndef WIN32
+			pqsignal(SIGPIPE, SIG_DFL);
+#endif
 #ifdef TIOCGWINSZ
 		}
 #endif