debian/rules: Use `git' potty wrapper.
[qmail] / tryflock.c
1 #include <sys/types.h>
2 #include <sys/file.h>
3 #include <fcntl.h>
4
5 void main()
6 {
7 flock(0,LOCK_EX | LOCK_UN | LOCK_NB);
8 }