From: William Lallemand <wlallemand@haproxy.com>
Date: Mon, 6 Nov 2017 10:00:04 +0000 (+0100)
Subject: MINOR: mworker: write parent pid in the pidfile
X-Git-Tag: v1.8-rc3~54
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=deed780a22d61e3c34f426f492f5735ac45109c1;p=thirdparty%2Fhaproxy.git

MINOR: mworker: write parent pid in the pidfile

The first pid in the pidfile is now the parent, it's more convenient for
supervising the processus.

You can now reload haproxy in master-worker mode with convenient command
like: kill -USR2 $(head -1 /tmp/haproxy.pid)
---

diff --git a/src/haproxy.c b/src/haproxy.c
index f12e903b28..bcbbad4a11 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -2631,6 +2631,13 @@ int main(int argc, char **argv)
 			}
 		}
 
+		/* if in master-worker mode, write the PID of the father */
+		if (global.mode & MODE_MWORKER) {
+			char pidstr[100];
+			snprintf(pidstr, sizeof(pidstr), "%d\n", getpid());
+			shut_your_big_mouth_gcc(write(pidfd, pidstr, strlen(pidstr)));
+		}
+
 		/* the father launches the required number of processes */
 		for (proc = 0; proc < global.nbproc; proc++) {
 			ret = fork();