Fcntl

Fcntl(3)               Perl Programmers Reference Guide               Fcntl(3)



NAME
       Fcntl - load the C Fcntl.h defines

SYNOPSIS
           use Fcntl;
           use Fcntl qw(:DEFAULT :flock);


DESCRIPTION
       This module is just a translation of the C fnctl.h file.  Unlike the
       old mechanism of requiring a translated fnctl.ph file, this uses the
       h2xs program (see the Perl source distribution) and your native C
       compiler.  This means that it has a far more likely chance of getting
       the numbers right.

NOTE
       Only #define symbols get translated; you must still correctly pack up
       your own arguments to pass as args for locking functions, etc.

EXPORTED SYMBOLS
       By default your system's F_* and O_* constants (eg, F_DUPFD and
       O_CREAT) and the FD_CLOEXEC constant are exported into your namespace.

       You can request that the flock() constants (LOCK_SH, LOCK_EX, LOCK_NB
       and LOCK_UN) be provided by using the tag :flock.  See the Exporter
       manpage.

       You can request that the old constants (FAPPEND, FASYNC, FCREAT,
       FDEFER, FEXCL, FNDELAY, FNONBLOCK, FSYNC, FTRUNC) be provided for
       compatibility reasons by using the tag :Fcompat.  For new applications
       the newer versions of these constants are suggested (O_APPEND, O_ASYNC,
       O_CREAT, O_DEFER, O_EXCL, O_NDELAY, O_NONBLOCK, O_SYNC, O_TRUNC).

       Please refer to your native fcntl() and open() documentation to see
       what constants are implemented in your system.










3rd Berkeley Distribution    perl 5.005, patch 02                     Fcntl(3)