the F_* macros associated with the lockf function are XSI-shaded (like
the lockf function itself) and should only be exposed when the
function is.
long sysconf(int);
size_t confstr(int, char *, size_t);
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define F_ULOCK 0
#define F_LOCK 1
#define F_TLOCK 2
#define F_TEST 3
-
-#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
int setreuid(uid_t, uid_t);
int setregid(gid_t, gid_t);
int lockf(int, int, off_t);