From: Zev Weiss <zev@bewilderbeest.net>
Date: Tue, 15 Oct 2019 04:36:50 +0000 (-0500)
Subject: alsactl: don't exit on EINTR from epoll_wait().
X-Git-Tag: v1.2.3~19
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=5830fc726ac9294641592a8c007502d573f6dea1;p=alsa-utils.git

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>
---

diff --git a/alsactl/monitor.c b/alsactl/monitor.c
index 6b090e4..cf4167b 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;
 		}