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package Fcntl;
=head1 NAME
Fcntl - load the C Fcntl.h defines
=head1 SYNOPSIS
use Fcntl;
use Fcntl qw(:DEFAULT :flock);
=head1 DESCRIPTION
This module is just a translation of the C F<fnctl.h> file.
Unlike the old mechanism of requiring a translated F<fnctl.ph>
file, this uses the B<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.
=head1 NOTE
Only C<#define> symbols get translated; you must still correctly
pack up your own arguments to pass as args for locking functions, etc.
=head1 EXPORTED SYMBOLS
By default your system's F_* and O_* constants (eg, F_DUPFD and O_CREAT)
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 C<:flock>. See L<Exporter>.
Please refer to your native fcntl() and open() documentation to see
what constants are implemented in your system.
=cut
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $AUTOLOAD);
require Exporter;
require DynaLoader;
@ISA = qw(Exporter DynaLoader);
$VERSION = "1.03";
# Items to export into callers namespace by default
# (move infrequently used names to @EXPORT_OK below)
@EXPORT =
qw(
F_DUPFD F_GETFD F_GETLK F_SETFD F_GETFL F_SETFL F_SETLK F_SETLKW
FD_CLOEXEC F_RDLCK F_UNLCK F_WRLCK
O_CREAT O_EXCL O_NOCTTY O_TRUNC
O_APPEND O_NONBLOCK
O_NDELAY O_DEFER
O_RDONLY O_RDWR O_WRONLY
O_EXLOCK O_SHLOCK O_ASYNC O_DSYNC O_RSYNC O_SYNC
F_SETOWN F_GETOWN
);
# Other items we are prepared to export if requested
@EXPORT_OK = qw(
LOCK_SH LOCK_EX LOCK_NB LOCK_UN
);
# Named groups of exports
%EXPORT_TAGS = (
'flock' => [qw(LOCK_SH LOCK_EX LOCK_NB LOCK_UN)],
);
sub AUTOLOAD {
my($constname);
($constname = $AUTOLOAD) =~ s/.*:://;
my $val = constant($constname, @_ ? $_[0] : 0);
if ($! != 0) {
if ($! =~ /Invalid/) {
$AutoLoader::AUTOLOAD = $AUTOLOAD;
goto &AutoLoader::AUTOLOAD;
}
else {
my ($pack,$file,$line) = caller;
die "Your vendor has not defined Fcntl macro $constname, used at $file line $line.
";
}
}
eval "sub $AUTOLOAD { $val }";
goto &$AUTOLOAD;
}
bootstrap Fcntl $VERSION;
1;
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