flock
struct flock {
#define flock(fd, flag) (fl.l_type = (flag), fcntl(fd, F_SETLKW, &fl))
# define flock(a, b) lockf(a, b, 0)
flock(int fildes, int operation)
typedef struct flock {
typedef struct flock {
typedef struct flock {
flock(int fd, int operation)
typedef struct flock {