Unix/Posix-specific functions for ByteStrings.
ByteString file-descriptor based I/O API, designed
loosely after the
String file-descriptor based I/O API in
System.Posix.IO. The functions here wrap standard C implementations
of the functions specified by the ISO/IEC 9945-1:1990 (``POSIX.1'')
and X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'')
Note that this package doesn't require the
unix package as a
dependency. But you'll need it in order to get your hands on
Fd, so we're not offering a complete replacement.