use IO::File;
$fh = new IO::File;
- if ($fh->open "< file") {
+ if ($fh->open("< file")) {
print <$fh>;
$fh->close;
}
- $fh = new IO::File "> FOO";
+ $fh = new IO::File "> file";
if (defined $fh) {
print $fh "bar\n";
$fh->close;
$fh = new IO::File "file", O_WRONLY|O_APPEND;
if (defined $fh) {
print $fh "corge\n";
- undef $fh; # automatically closes the file
- }
- $pos = $fh->getpos;
- $fh->setpos $pos;
+ $pos = $fh->getpos;
+ $fh->setpos($pos);
- $fh->setvbuf($buffer_var, _IOLBF, 1024);
+ undef $fh; # automatically closes the file
+ }
autoflush STDOUT 1;
=head1 DESCRIPTION
-C<IO::File::new> creates a C<IO::File>, which is a reference to a
-newly created symbol (see the C<Symbol> package). If it receives any
-parameters, they are passed to C<IO::File::open>; if the open fails,
-the C<IO::File> object is destroyed. Otherwise, it is returned to
-the caller.
+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 ( FILENAME [,MODE [,PERMS]] )
+
+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
-C<IO::File::open> accepts one parameter or two. With one parameter,
-it is just a front end for the built-in C<open> function. With two
+=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 or three
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 (">", "+<", etc.)
-or a POSIX fopen() mode string ("w", "r+", etc.), it uses the basic
-Perl C<open> operator.
+If C<IO::File::open> receives a Perl mode string ("E<gt>", "+E<lt>", etc.)
+or a ANSI C fopen() mode string ("w", "r+", etc.), it uses the basic
+Perl C<open> operator (but protects any special characters).
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.
+The permissions default to 0666.
+
+For convenience, C<IO::File> exports the O_XXX constants from the
+Fcntl module, if this module is available.
+
+=back
=head1 SEE ALSO
L<perlfunc>,
L<perlop/"I/O Operators">,
-L<"IO::Handle">
-L<"IO::Seekable">
+L<IO::Handle>
+L<IO::Seekable>
=head1 HISTORY
-Derived from FileHandle.pm by Graham Barr <bodg@tiuk.ti.com>
-
-=head1 REVISION
-
-$Revision: 1.3 $
+Derived from FileHandle.pm by Graham Barr E<lt>F<gbarr@pobox.com>E<gt>.
=cut
require 5.000;
-use vars qw($VERSION @EXPORT @EXPORT_OK $AUTOLOAD);
+use strict;
+use vars qw($VERSION @EXPORT @EXPORT_OK @ISA);
use Carp;
use Symbol;
-use English;
use SelectSaver;
-use IO::Handle qw(_open_mode_string);
use IO::Seekable;
require Exporter;
@ISA = qw(IO::Handle IO::Seekable Exporter DynaLoader);
-$VERSION = sprintf("%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/);
+$VERSION = "1.08";
@EXPORT = @IO::Seekable::EXPORT;
-################################################
-## If the Fcntl extension is available,
-## export its constants.
-##
-
-sub import {
- my $pkg = shift;
- my $callpkg = caller;
- Exporter::export $pkg, $callpkg;
- eval {
- require Fcntl;
- Exporter::export 'Fcntl', $callpkg;
- };
+eval {
+ # Make all Fcntl O_XXX constants available for importing
+ require Fcntl;
+ my @O = grep /^O_/, @Fcntl::EXPORT;
+ Fcntl->import(@O); # first we import what we want to export
+ push(@EXPORT, @O);
};
-
################################################
## Constructor
##
sub new {
- @_ >= 1 && @_ <= 4
- or croak 'usage: new IO::File [FILENAME [,MODE [,PERMS]]]';
- my $class = shift;
+ 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(@_)
defined $perms or $perms = 0666;
return sysopen($fh, $file, $mode, $perms);
}
- $file = "./" . $file unless $file =~ m#^/#;
- $file = _open_mode_string($mode) . " $file\0";
+ $file = './' . $file if $file =~ m{\A[^\\/\w]};
+ $file = IO::Handle::_open_mode_string($mode) . " $file\0";
}
open($fh, $file);
}
projects / p5sagit/p5-mst-13.2.git / blobdiff