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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) 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 C<:flock>. See L<Exporter>.
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 C<: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).
For ease of use also the SEEK_* constants (for seek() and sysseek(),
e.g. SEEK_END) and the S_I* constants (for chmod() and stat()) are
available for import. They can be imported either separately or using
the tags C<:seek> and C<:mode>.
Please refer to your native fcntl(2), open(2), fseek(3), lseek(2)
(equal to Perl's seek() and sysseek(), respectively), and chmod(2)
documentation to see what constants are implemented in your system.
See L<perlopentut> to learn about the uses of the O_* constants
with sysopen().
See L<perlfunc/seek> and L<perlfunc/sysseek> about the SEEK_* constants.
See L<perlfunc/stat> about the S_I* constants.
=cut
our($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS, $AUTOLOAD);
require Exporter;
use XSLoader ();
@ISA = qw(Exporter);
$VERSION = "1.04";
# Items to export into callers namespace by default
# (move infrequently used names to @EXPORT_OK below)
@EXPORT =
qw(
FD_CLOEXEC
F_ALLOCSP
F_ALLOCSP64
F_COMPAT
F_DUP2FD
F_DUPFD
F_EXLCK
F_FREESP
F_FREESP64
F_FSYNC
F_FSYNC64
F_GETFD
F_GETFL
F_GETLK
F_GETLK64
F_GETOWN
F_NODNY
F_POSIX
F_RDACC
F_RDDNY
F_RDLCK
F_RWACC
F_RWDNY
F_SETFD
F_SETFL
F_SETLK
F_SETLK64
F_SETLKW
F_SETLKW64
F_SETOWN
F_SHARE
F_SHLCK
F_UNLCK
F_UNSHARE
F_WRACC
F_WRDNY
F_WRLCK
O_ACCMODE
O_ALIAS
O_APPEND
O_ASYNC
O_BINARY
O_CREAT
O_DEFER
O_DIRECT
O_DIRECTORY
O_DSYNC
O_EXCL
O_EXLOCK
O_LARGEFILE
O_NDELAY
O_NOCTTY
O_NOFOLLOW
O_NOINHERIT
O_NONBLOCK
O_RANDOM
O_RAW
O_RDONLY
O_RDWR
O_RSRC
O_RSYNC
O_SEQUENTIAL
O_SHLOCK
O_SYNC
O_TEMPORARY
O_TEXT
O_TRUNC
O_WRONLY
);
# Other items we are prepared to export if requested
@EXPORT_OK = qw(
FAPPEND
FASYNC
FCREAT
FDEFER
FDSYNC
FEXCL
FLARGEFILE
FNDELAY
FNONBLOCK
FRSYNC
FSYNC
FTRUNC
LOCK_EX
LOCK_NB
LOCK_SH
LOCK_UN
S_ISUID S_ISGID S_ISVTX S_ISTXT
_S_IFMT S_IFREG S_IFDIR S_IFLNK
S_IFSOCK S_IFBLK S_IFCHR S_IFIFO S_IFWHT S_ENFMT
S_IRUSR S_IWUSR S_IXUSR S_IRWXU
S_IRGRP S_IWGRP S_IXGRP S_IRWXG
S_IROTH S_IWOTH S_IXOTH S_IRWXO
S_IREAD S_IWRITE S_IEXEC
&S_ISREG &S_ISDIR &S_ISLNK &S_ISSOCK &S_ISBLK &S_ISCHR &S_ISFIFO
&S_ISWHT &S_ISENFMT &S_IFMT &S_IMODE
SEEK_SET
SEEK_CUR
SEEK_END
);
# Named groups of exports
%EXPORT_TAGS = (
'flock' => [qw(LOCK_SH LOCK_EX LOCK_NB LOCK_UN)],
'Fcompat' => [qw(FAPPEND FASYNC FCREAT FDEFER FDSYNC FEXCL FLARGEFILE
FNDELAY FNONBLOCK FRSYNC FSYNC FTRUNC)],
'seek' => [qw(SEEK_SET SEEK_CUR SEEK_END)],
'mode' => [qw(S_ISUID S_ISGID S_ISVTX S_ISTXT
_S_IFMT S_IFREG S_IFDIR S_IFLNK
S_IFSOCK S_IFBLK S_IFCHR S_IFIFO S_IFWHT S_ENFMT
S_IRUSR S_IWUSR S_IXUSR S_IRWXU
S_IRGRP S_IWGRP S_IXGRP S_IRWXG
S_IROTH S_IWOTH S_IXOTH S_IRWXO
S_IREAD S_IWRITE S_IEXEC
S_ISREG S_ISDIR S_ISLNK S_ISSOCK
S_ISBLK S_ISCHR S_ISFIFO
S_ISWHT S_ISENFMT
S_IFMT S_IMODE
)],
);
sub S_IFMT { @_ ? ( $_[0] & _S_IFMT() ) : _S_IFMT() }
sub S_IMODE { $_[0] & 07777 }
sub S_ISREG { ( $_[0] & _S_IFMT() ) == S_IFREG() }
sub S_ISDIR { ( $_[0] & _S_IFMT() ) == S_IFDIR() }
sub S_ISLNK { ( $_[0] & _S_IFMT() ) == S_IFLNK() }
sub S_ISSOCK { ( $_[0] & _S_IFMT() ) == S_IFSOCK() }
sub S_ISBLK { ( $_[0] & _S_IFMT() ) == S_IFBLK() }
sub S_ISCHR { ( $_[0] & _S_IFMT() ) == S_IFCHR() }
sub S_ISFIFO { ( $_[0] & _S_IFMT() ) == S_IFIFO() }
sub S_ISWHT { ( $_[0] & _S_IFMT() ) == S_IFWHT() }
sub S_ISENFMT { ( $_[0] & _S_IFMT() ) == S_IFENFMT() }
sub AUTOLOAD {
(my $constname = $AUTOLOAD) =~ s/.*:://;
die "&Fcntl::constant not defined" if $constname eq 'constant';
my ($error, $val) = constant($constname);
if ($error) {
my (undef,$file,$line) = caller;
die "$error at $file line $line.\n";
}
*$AUTOLOAD = sub { $val };
goto &$AUTOLOAD;
}
XSLoader::load 'Fcntl', $VERSION;
1;
|
