From d065b3eb9ed6785a19dc7d96fb34a0050747c663 Mon Sep 17 00:00:00 2001
From: Maxim Sobolev <sobomax@FreeBSD.org>
Date: Mon, 24 Aug 2020 16:45:23 +0000
Subject: [PATCH] In the endless batch mode (-B), terminate if and when stdout
 is closed. That mode is useful to call gstat from other app, however kinda
 useless since gstat won't exit and stay running forever when its parent
 process has long gone.

MFC after:	2 weeks
---
 usr.sbin/gstat/gstat.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/usr.sbin/gstat/gstat.c b/usr.sbin/gstat/gstat.c
index 1c75fd5bf2d..c2d28720205 100644
--- a/usr.sbin/gstat/gstat.c
+++ b/usr.sbin/gstat/gstat.c
@@ -517,7 +517,8 @@ main(int argc, char **argv)
 			if (!flag_B)
 				loop = 0;
 			else
-				fflush(stdout);
+				if (fflush(stdout) == EOF)
+					goto out;
 			usleep(flag_I);
 			continue;
 		}
@@ -585,7 +586,7 @@ main(int argc, char **argv)
 			}
 		}
 	}
-
+out:
 	if (!flag_b) {
 		el_end(el);
 		endwin();