original, as downloaded from http://www.qmail.org/netqmail-1.06.tar.gz

1 files changed, 8 insertions, 0 deletions

diff --git a/tryflock.c b/tryflock.c
new file mode 100644
index 0000000..8c8aa76
--- /dev/null
+++ b/tryflock.c
@@ -0,0 +1,8 @@
+#include <sys/types.h>
+#include <sys/file.h>
+#include <fcntl.h>
+
+void main()
+{
+  flock(0,LOCK_EX | LOCK_UN | LOCK_NB);
+}