1 files changed, 13 insertions, 0 deletions
diff --git a/src/sysdeps/tryflock.c b/src/sysdeps/tryflock.c
new file mode 100644
index 0000000..47fadf8
--- /dev/null
+++ b/src/sysdeps/tryflock.c
@@ -0,0 +1,13 @@
+/* ISC license. */
+
+#undef _POSIX_C_SOURCE
+#undef _XOPEN_SOURCE
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <fcntl.h>
+
+int main (void)
+{
+  return flock(0, LOCK_EX | LOCK_UN | LOCK_NB) ;
+}