#package IO::File;=head1 NAMEIO::File - supply object methods for filehandles=head1 SYNOPSIS    use IO::File;    $fh = new IO::File;    if ($fh->open("< file")) {        print <$fh>;        $fh->close;    }    $fh = new IO::File "> file";    if (defined $fh) {        print $fh "bar\n";        $fh->close;    }    $fh = new IO::File "file", "r";    if (defined $fh) {        print <$fh>;        undef $fh;       # automatically closes the file    }    $fh = new IO::File "file", O_WRONLY|O_APPEND;    if (defined $fh) {        print $fh "corge\n";        $pos = $fh->getpos;        $fh->setpos($pos);        undef $fh;       # automatically closes the file    }    autoflush STDOUT 1;=head1 DESCRIPTIONC<IO::File> inherits from C<IO::Handle> and C<IO::Seekable>. It extendsthese classes with methods that are specific to file handles.=head1 CONSTRUCTOR=over 4=item new ([ ARGS ] )Creates a C<IO::File>.  If it receives any parameters, they are passed tothe method C<open>; if the open fails, the object is destroyed.  Otherwise,it is returned to the caller.=item new_tmpfileCreates an C<IO::File> opened for read/write on a newly created temporaryfile.  On systems where this is possible, the temporary file is anonymous(i.e. it is unlinked after creation, but held open).  If the temporaryfile cannot be created or opened, the C<IO::File> object is destroyed.Otherwise, it is returned to the caller.=back=head1 METHODS=over 4=item open( FILENAME [,MODE [,PERMS]] )C<open> accepts one, two or three parameters.  With one parameter,it is just a front end for the built-in C<open> function.  With twoparameters, the first parameter is a filename that may includewhitespace or other special characters, and the second parameter isthe open mode, optionally followed by a file permission value.If C<IO::File::open> receives a Perl mode string ("E<gt>", "+E<lt>", etc.)or a POSIX fopen() mode string ("w", "r+", etc.), it uses the basicPerl C<open> operator.If C<IO::File::open> is given a numeric mode, it passes that modeand the optional permissions value to the Perl C<sysopen> operator.For convenience, C<IO::File::import> tries to import the O_XXXconstants from the Fcntl module.  If dynamic loading is not available,this may fail, but the rest of IO::File will still work.=back=head1 SEE ALSOL<perlfunc>, L<perlop/"I/O Operators">,L<IO::Handle>L<IO::Seekable>=head1 HISTORYDerived from FileHandle.pm by Graham Barr E<lt>F<bodg@tiuk.ti.com>E<gt>.=cutrequire 5.000;use strict;use vars qw($VERSION @EXPORT @EXPORT_OK $AUTOLOAD @ISA);use Carp;use Symbol;use SelectSaver;use IO::Seekable;require Exporter;require DynaLoader;@ISA = qw(IO::Handle IO::Seekable Exporter DynaLoader);$VERSION = "1.0602";@EXPORT = @IO::Seekable::EXPORT;sub import {    my $pkg = shift;    my $callpkg = caller;    Exporter::export $pkg, $callpkg, @_;    #    # If the Fcntl extension is available,    #  export its constants for sysopen().    #    eval {    require Fcntl;    Exporter::export 'Fcntl', $callpkg, '/^O_/';    };}################################################## Constructor##sub new {    my $type = shift;    my $class = ref($type) || $type || "IO::File";    @_ >= 0 && @_ <= 3    or croak "usage: new $class [FILENAME [,MODE [,PERMS]]]";    my $fh = $class->SUPER::new();    if (@_) {    $fh->open(@_)        or return undef;    }    $fh;}################################################## Open##eval ($^O eq 'MacOS' ? <<'END_MAC' : <<'END_NOMAC');sub _protect {    my($name) = @_;    MacPerl::MakeFSSpec($name);}END_MACsub _protect {    my($name) = @_;    "./$name";}END_NOMACsub open {    @_ >= 2 && @_ <= 4 or croak 'usage: $fh->open(FILENAME [,MODE [,PERMS]])';    my ($fh, $file) = @_;    if (@_ > 2) {    my ($mode, $perms) = @_[2, 3];    if ($mode =~ /^\d+$/) {        defined $perms or $perms = 0666;        return sysopen($fh, $file, $mode, $perms);    }    $file = _protect($file) if $file =~ m{\A[^\\/\w]};    $file = IO::Handle::_open_mode_string($mode) . " $file\0";    }    open($fh, $file);}1;