From 249866e3d1e11dc72eaa1305f4bb479ded92ef38 Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Tue, 9 Jul 2024 13:58:20 +0200
Subject: reorganized file structure

Moved c files into src/.
Corrected VERSION file.
Removed BUILD and FILES.
---
 src/lock.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 src/lock.c

(limited to 'src/lock.c')

diff --git a/src/lock.c b/src/lock.c
new file mode 100644
index 0000000..4ac6b40
--- /dev/null
+++ b/src/lock.c
@@ -0,0 +1,22 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/file.h>
+#include <fcntl.h>
+#include "lock.h"
+
+/**
+	@file lock.c
+	@author djb
+	@source qmail
+	@brief locking of resources
+*/
+
+#ifdef HASFLOCK
+int lock_ex(int fd) { return flock(fd,LOCK_EX); }
+int lock_exnb(int fd) { return flock(fd,LOCK_EX | LOCK_NB); }
+int lock_un(int fd) { return flock(fd,LOCK_UN); }
+#else
+int lock_ex(int fd) { return lockf(fd,1,0); }
+int lock_exnb(int fd) { return lockf(fd,2,0); }
+int lock_un(int fd) { return lockf(fd,0,0); }
+#endif
-- 
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