From cc4819ee3484fd186775b6c13b46ff2a2ba99466 Mon Sep 17 00:00:00 2001
From: sobomax <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 1c75fd5bf2d8..c2d28720205f 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();