lib/perl5/5.6.1/msys/Fcntl.pm

   1 package Fcntl;
   2
   3 =head1 NAME
   4
   5 Fcntl - load the C Fcntl.h defines
   6
   7 =head1 SYNOPSIS
   8
   9     use Fcntl;
  10     use Fcntl qw(:DEFAULT :flock);
  11
  12 =head1 DESCRIPTION
  13
  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.
  19
  20 =head1 NOTE
  21
  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.
  24
  25 =head1 EXPORTED SYMBOLS
  26
  27 By default your system's F_* and O_* constants (eg, F_DUPFD and
  28 O_CREAT) and the FD_CLOEXEC constant are exported into your namespace.
  29
  30 You can request that the flock() constants (LOCK_SH, LOCK_EX, LOCK_NB
  31 and LOCK_UN) be provided by using the tag C<:flock>.  See L<Exporter>.
  32
  33 You can request that the old constants (FAPPEND, FASYNC, FCREAT,
  34 FDEFER, FEXCL, FNDELAY, FNONBLOCK, FSYNC, FTRUNC) be provided for
  35 compatibility reasons by using the tag C<:Fcompat>.  For new
  36 applications the newer versions of these constants are suggested
  37 (O_APPEND, O_ASYNC, O_CREAT, O_DEFER, O_EXCL, O_NDELAY, O_NONBLOCK,
  38 O_SYNC, O_TRUNC).
  39
  40 For ease of use also the SEEK_* constants (for seek() and sysseek(),
  41 e.g. SEEK_END) and the S_I* constants (for chmod() and stat()) are
  42 available for import.  They can be imported either separately or using
  43 the tags C<:seek> and C<:mode>.
  44
  45 Please refer to your native fcntl(2), open(2), fseek(3), lseek(2)
  46 (equal to Perl's seek() and sysseek(), respectively), and chmod(2)
  47 documentation to see what constants are implemented in your system.
  48
  49 See L<perlopentut> to learn about the uses of the O_* constants
  50 with sysopen().
  51
  52 See L<perlfunc/seek> and L<perlfunc/sysseek> about the SEEK_* constants.
  53
  54 See L<perlfunc/stat> about the S_I* constants.
  55
  56 =cut
  57
  58 our($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS, $AUTOLOAD);
  59
  60 require Exporter;
  61 use XSLoader ();
  62 @ISA = qw(Exporter);
  63 $VERSION = "1.03";
  64 # Items to export into callers namespace by default
  65 # (move infrequently used names to @EXPORT_OK below)
  66 @EXPORT =
  67   qw(
  68         FD_CLOEXEC
  69         F_ALLOCSP
  70         F_ALLOCSP64
  71         F_COMPAT
  72         F_DUP2FD
  73         F_DUPFD
  74         F_EXLCK
  75         F_FREESP
  76         F_FREESP64
  77         F_FSYNC
  78         F_FSYNC64
  79         F_GETFD
  80         F_GETFL
  81         F_GETLK
  82         F_GETLK64
  83         F_GETOWN
  84         F_NODNY
  85         F_POSIX
  86         F_RDACC
  87         F_RDDNY
  88         F_RDLCK
  89         F_RWACC
  90         F_RWDNY
  91         F_SETFD
  92         F_SETFL
  93         F_SETLK
  94         F_SETLK64
  95         F_SETLKW
  96         F_SETLKW64
  97         F_SETOWN
  98         F_SHARE
  99         F_SHLCK
 100         F_UNLCK
 101         F_UNSHARE
 102         F_WRACC
 103         F_WRDNY
 104         F_WRLCK
 105         O_ACCMODE
 106         O_ALIAS
 107         O_APPEND
 108         O_ASYNC
 109         O_BINARY
 110         O_CREAT
 111         O_DEFER
 112         O_DIRECT
 113         O_DIRECTORY
 114         O_DSYNC
 115         O_EXCL
 116         O_EXLOCK
 117         O_LARGEFILE
 118         O_NDELAY
 119         O_NOCTTY
 120         O_NOFOLLOW
 121         O_NOINHERIT
 122         O_NONBLOCK
 123         O_RANDOM
 124         O_RAW
 125         O_RDONLY
 126         O_RDWR
 127         O_RSRC
 128         O_RSYNC
 129         O_SEQUENTIAL
 130         O_SHLOCK
 131         O_SYNC
 132         O_TEMPORARY
 133         O_TEXT
 134         O_TRUNC
 135         O_WRONLY
 136      );
 137
 138 # Other items we are prepared to export if requested
 139 @EXPORT_OK = qw(
 140         FAPPEND
 141         FASYNC
 142         FCREAT
 143         FDEFER
 144         FDSYNC
 145         FEXCL
 146         FLARGEFILE
 147         FNDELAY
 148         FNONBLOCK
 149         FRSYNC
 150         FSYNC
 151         FTRUNC
 152         LOCK_EX
 153         LOCK_NB
 154         LOCK_SH
 155         LOCK_UN
 156         S_ISUID S_ISGID S_ISVTX S_ISTXT
 157         _S_IFMT S_IFREG S_IFDIR S_IFLNK
 158         S_IFSOCK S_IFBLK S_IFCHR S_IFIFO S_IFWHT S_ENFMT
 159         S_IRUSR S_IWUSR S_IXUSR S_IRWXU
 160         S_IRGRP S_IWGRP S_IXGRP S_IRWXG
 161         S_IROTH S_IWOTH S_IXOTH S_IRWXO
 162         S_IREAD S_IWRITE S_IEXEC
 163         &S_ISREG &S_ISDIR &S_ISLNK &S_ISSOCK &S_ISBLK &S_ISCHR &S_ISFIFO
 164         &S_ISWHT &S_ISENFMT &S_IFMT &S_IMODE
 165         SEEK_SET
 166         SEEK_CUR
 167         SEEK_END
 168 );
 169 # Named groups of exports
 170 %EXPORT_TAGS = (
 171     'flock'   => [qw(LOCK_SH LOCK_EX LOCK_NB LOCK_UN)],
 172     'Fcompat' => [qw(FAPPEND FASYNC FCREAT FDEFER FDSYNC FEXCL FLARGEFILE
 173                      FNDELAY FNONBLOCK FRSYNC FSYNC FTRUNC)],
 174     'seek'    => [qw(SEEK_SET SEEK_CUR SEEK_END)],
 175     'mode'    => [qw(S_ISUID S_ISGID S_ISVTX S_ISTXT
 176                      _S_IFMT S_IFREG S_IFDIR S_IFLNK
 177                      S_IFSOCK S_IFBLK S_IFCHR S_IFIFO S_IFWHT S_ENFMT
 178                      S_IRUSR S_IWUSR S_IXUSR S_IRWXU
 179                      S_IRGRP S_IWGRP S_IXGRP S_IRWXG
 180                      S_IROTH S_IWOTH S_IXOTH S_IRWXO
 181                      S_IREAD S_IWRITE S_IEXEC
 182                      S_ISREG S_ISDIR S_ISLNK S_ISSOCK
 183                      S_ISBLK S_ISCHR S_ISFIFO
 184                      S_ISWHT S_ISENFMT
 185                      S_IFMT S_IMODE
 186                   )],
 187 );
 188
 189 sub S_IFMT  { @_ ? ( $_[0] & _S_IFMT() ) : _S_IFMT()  }
 190 sub S_IMODE { $_[0] & 07777 }
 191
 192 sub S_ISREG    { ( $_[0] & _S_IFMT() ) == S_IFREG()   }
 193 sub S_ISDIR    { ( $_[0] & _S_IFMT() ) == S_IFDIR()   }
 194 sub S_ISLNK    { ( $_[0] & _S_IFMT() ) == S_IFLNK()   }
 195 sub S_ISSOCK   { ( $_[0] & _S_IFMT() ) == S_IFSOCK()  }
 196 sub S_ISBLK    { ( $_[0] & _S_IFMT() ) == S_IFBLK()   }
 197 sub S_ISCHR    { ( $_[0] & _S_IFMT() ) == S_IFCHR()   }
 198 sub S_ISFIFO   { ( $_[0] & _S_IFMT() ) == S_IFIFO()   }
 199 sub S_ISWHT    { ( $_[0] & _S_IFMT() ) == S_IFWHT()   }
 200 sub S_ISENFMT  { ( $_[0] & _S_IFMT() ) == S_IFENFMT() }
 201
 202 sub AUTOLOAD {
 203     (my $constname = $AUTOLOAD) =~ s/.*:://;
 204     my $val = constant($constname, 0);
 205     if ($! != 0) {
 206         if ($! =~ /Invalid/ || $!{EINVAL}) {
 207             $AutoLoader::AUTOLOAD = $AUTOLOAD;
 208             goto &AutoLoader::AUTOLOAD;
 209         }
 210         else {
 211             my ($pack,$file,$line) = caller;
 212             die "Your vendor has not defined Fcntl macro $constname, used at $file line $line.
 213 ";
 214         }
 215     }
 216     *$AUTOLOAD = sub { $val };
 217     goto &$AUTOLOAD;
 218 }
 219
 220 XSLoader::load 'Fcntl', $VERSION;
 221
 222 1;