From: Stef Walter <stefw@redhat.com>
Date: Fri, 15 Jul 2016 10:24:34 +0000 (+0200)
Subject: udev: Line buffer 'udev monitor' output (#3733)
X-Git-Tag: v231~60
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8d00539d992266050eca672358c185aa2eb0bab3;p=platform%2Fupstream%2Fsystemd.git

udev: Line buffer 'udev monitor' output (#3733)

Callers of the 'udev monitor' tool expect to see output when
an event occurs. The stdio buffering defeats that. This patch
switches it to line buffering.
---

diff --git a/src/udev/udevadm-monitor.c b/src/udev/udevadm-monitor.c
index c0ef073..f656c21 100644
--- a/src/udev/udevadm-monitor.c
+++ b/src/udev/udevadm-monitor.c
@@ -151,6 +151,9 @@ static int adm_monitor(struct udev *udev, int argc, char *argv[]) {
         sigaddset(&mask, SIGTERM);
         sigprocmask(SIG_UNBLOCK, &mask, NULL);
 
+        /* Callers are expecting to see events as they happen: Line buffering */
+        setlinebuf(stdout);
+
         fd_ep = epoll_create1(EPOLL_CLOEXEC);
         if (fd_ep < 0) {
                 log_error_errno(errno, "error creating epoll fd: %m");