From b7e1ae2328f7d5a88d8916d78b4561d8ef16f99b 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/fe_utils/print.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/fe_utils/print.c b/src/fe_utils/print.c
index 5c5d285be5..daa23d1955 100644
--- a/src/fe_utils/print.c
+++ b/src/fe_utils/print.c
@@ -2884,6 +2884,8 @@ PageOutput(int lines, const printTableOpt *topt)
 			pagerpipe = popen(pagerprog, "w");
 			if (pagerpipe)
 				return pagerpipe;
+			/* if popen fails, silently proceed without pager */
+			restore_sigpipe_trap();
 		}
 	}