From 5830fc726ac9294641592a8c007502d573f6dea1 Mon Sep 17 00:00:00 2001
From: Zev Weiss <zev@bewilderbeest.net>
Date: Mon, 14 Oct 2019 23:36:50 -0500
Subject: [PATCH] alsactl: don't exit on EINTR from epoll_wait().

Previously, things like attaching strace to a running 'alsactl monitor'
process would cause it to exit.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Tested-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
 alsactl/monitor.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/alsactl/monitor.c b/alsactl/monitor.c
index 6b090e4f5c92..cf4167bee165 100644
--- a/alsactl/monitor.c
+++ b/alsactl/monitor.c
@@ -342,6 +342,8 @@ static int run_dispatcher(int epfd, int sigfd, int infd, struct list_head *srcs,
 
 		count = epoll_wait(epfd, epev, max_ev_count, 200);
 		if (count < 0) {
+			if (errno == EINTR)
+				continue;
 			err = count;
 			break;
 		}
-- 
2.16.4