lockf
=====

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/lockf.html

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: Minix 3.1.8, Cygwin 1.5.x, mingw, MSVC 9, BeOS.

  * On platforms where off_t is a 32-bit type, this function may not work correctly across the entire data range of files larger than 2 GB. The fix is to use the AC_SYS_LARGEFILE macro.