From: Andrea Claudi <aclaudi@redhat.com>
Date: Thu, 12 Mar 2026 18:35:47 +0000 (+0100)
Subject: dpll: Fix missing notifications in monitor mode
X-Git-Tag: v7.0.0~4
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=4942e67f71f2df8e45eff723af114644b0eb9894;p=thirdparty%2Fiproute2.git

dpll: Fix missing notifications in monitor mode

When running dpll monitor with output redirected to a file, notifications
could be lost because stdout is fully buffered for file redirection instead
of line-buffered like in interactive mode. If the program is killed or
crashes, buffered data is lost before reaching the file.

Fix by calling fflush(stdout) after each notification to ensure immediate
writes to the log file.

Fixes: 656cfc3ce05b ("dpll: Add dpll command")
Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---

diff --git a/dpll/dpll.c b/dpll/dpll.c
index 0effa5a9..7b05bf86 100644
--- a/dpll/dpll.c
+++ b/dpll/dpll.c
@@ -1883,6 +1883,7 @@ static int cmd_monitor_cb(const struct nlmsghdr *nlh, void *data)
 		break;
 	}
 
+	fflush(stdout);
 	return ret;
 }