5 Fcntl - load the C Fcntl.h defines
10 use Fcntl qw(:DEFAULT :flock);
14 This module is just a translation of the C F<fnctl.h> file.
15 Unlike the old mechanism of requiring a translated F<fnctl.ph>
16 file, this uses the B<h2xs> program (see the Perl source distribution)
17 and your native C compiler. This means that it has a
18 far more likely chance of getting the numbers right.
22 Only C<#define> symbols get translated; you must still correctly
23 pack up your own arguments to pass as args for locking functions, etc.
25 =head1 EXPORTED SYMBOLS
27 By default your system's F_* and O_* constants (eg, F_DUPFD and O_CREAT)
28 are exported into your namespace. You can request that the flock()
29 constants (LOCK_SH, LOCK_EX, LOCK_NB and LOCK_UN) be provided by using
30 the tag C<:flock>. See L<Exporter>.
34 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $AUTOLOAD);
38 @ISA = qw(Exporter DynaLoader);
40 # Items to export into callers namespace by default
41 # (move infrequently used names to @EXPORT_OK below)
44 F_DUPFD F_GETFD F_GETLK F_SETFD F_GETFL F_SETFL F_SETLK F_SETLKW
45 FD_CLOEXEC F_RDLCK F_UNLCK F_WRLCK
46 O_CREAT O_EXCL O_NOCTTY O_TRUNC
49 O_RDONLY O_RDWR O_WRONLY
51 # Other items we are prepared to export if requested
53 LOCK_SH LOCK_EX LOCK_NB LOCK_UN
55 # Named groups of exports
57 'flock' => [qw(LOCK_SH LOCK_EX LOCK_NB LOCK_UN)],
62 ($constname = $AUTOLOAD) =~ s/.*:://;
63 my $val = constant($constname, @_ ? $_[0] : 0);
65 if ($! =~ /Invalid/) {
66 $AutoLoader::AUTOLOAD = $AUTOLOAD;
67 goto &AutoLoader::AUTOLOAD;
70 my ($pack,$file,$line) = caller;
71 die "Your vendor has not defined Fcntl macro $constname, used at $file line $line.
75 eval "sub $AUTOLOAD { $val }";
79 bootstrap Fcntl $VERSION;