From 0be33f7050167371748a17f7b3036f54e5f3204b Mon Sep 17 00:00:00 2001
From: Donald Buczek <buczek@molgen.mpg.de>
Date: Fri, 17 Sep 2021 12:08:44 +0200
Subject: [PATCH] mx_flock: Add mx_funlock_nodelete

Add function to release the lock without removing the logfile. This is
useful for forked children, which inherited the lock and just need to
give it up.
---
 mx_flock.c | 7 +++++++
 mx_flock.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/mx_flock.c b/mx_flock.c
index ab9f3dba..ef4d3ede 100644
--- a/mx_flock.c
+++ b/mx_flock.c
@@ -155,6 +155,13 @@ int mx_funlock(struct mx_flock *lock)
     return res;
 }
 
+/* as above, but don't delete lock file
+ */
+void mx_funlock_nodelete(struct mx_flock *lock) {
+    _flock_close(lock);
+    _flock_free(lock);
+}
+
 void mx_flock_free(struct mx_flock *lock)
 {
     _flock_free(lock);
diff --git a/mx_flock.h b/mx_flock.h
index 34ab4e8d..9b632829 100644
--- a/mx_flock.h
+++ b/mx_flock.h
@@ -10,6 +10,7 @@ struct mx_flock {
 
 struct mx_flock *mx_flock(int operation, char *fmt, ...);
 int mx_funlock(struct mx_flock *lock);
+void mx_funlock_nodelete(struct mx_flock *lock);
 void mx_flock_free(struct mx_flock *lock);
 
 #endif