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.\" ========================================================================
.\"
.IX Title "IO::File 3"
.TH IO::File 3 "2002-11-24" "perl v5.8.0" "Perl Programmers Reference Guide"
.SH "NAME"
IO::File \- supply object methods for filehandles
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use IO::File;
.Ve
.PP
.Vb 5
\&    $fh = new IO::File;
\&    if ($fh->open("< file")) {
\&        print <$fh>;
\&        $fh->close;
\&    }
.Ve
.PP
.Vb 5
\&    $fh = new IO::File "> file";
\&    if (defined $fh) {
\&        print $fh "bar\en";
\&        $fh->close;
\&    }
.Ve
.PP
.Vb 5
\&    $fh = new IO::File "file", "r";
\&    if (defined $fh) {
\&        print <$fh>;
\&        undef $fh;       # automatically closes the file
\&    }
.Ve
.PP
.Vb 3
\&    $fh = new IO::File "file", O_WRONLY|O_APPEND;
\&    if (defined $fh) {
\&        print $fh "corge\en";
.Ve
.PP
.Vb 2
\&        $pos = $fh->getpos;
\&        $fh->setpos($pos);
.Ve
.PP
.Vb 2
\&        undef $fh;       # automatically closes the file
\&    }
.Ve
.PP
.Vb 1
\&    autoflush STDOUT 1;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`IO::File\*(C'\fR inherits from \f(CW\*(C`IO::Handle\*(C'\fR and \f(CW\*(C`IO::Seekable\*(C'\fR. It extends
these classes with methods that are specific to file handles.
.SH "CONSTRUCTOR"
.IX Header "CONSTRUCTOR"
.IP "new ( \s-1FILENAME\s0 [,MODE [,PERMS]] )" 4
.IX Item "new ( FILENAME [,MODE [,PERMS]] )"
Creates an \f(CW\*(C`IO::File\*(C'\fR.  If it receives any parameters, they are passed to
the method \f(CW\*(C`open\*(C'\fR; if the open fails, the object is destroyed.  Otherwise,
it is returned to the caller.
.IP "new_tmpfile" 4
.IX Item "new_tmpfile"
Creates an \f(CW\*(C`IO::File\*(C'\fR 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 \f(CW\*(C`IO::File\*(C'\fR object is destroyed.
Otherwise, it is returned to the caller.
.SH "METHODS"
.IX Header "METHODS"
.IP "open( \s-1FILENAME\s0 [,MODE [,PERMS]] )" 4
.IX Item "open( FILENAME [,MODE [,PERMS]] )"
\&\f(CW\*(C`open\*(C'\fR accepts one, two or three parameters.  With one parameter,
it is just a front end for the built-in \f(CW\*(C`open\*(C'\fR 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.
.Sp
If \f(CW\*(C`IO::File::open\*(C'\fR receives a Perl mode string (">\*(L", \*(R"+<\*(L", etc.)
or an \s-1ANSI\s0 C \fIfopen()\fR mode string (\*(R"w\*(L", \*(R"r+", etc.), it uses the basic
Perl \f(CW\*(C`open\*(C'\fR operator (but protects any special characters).
.Sp
If \f(CW\*(C`IO::File::open\*(C'\fR is given a numeric mode, it passes that mode
and the optional permissions value to the Perl \f(CW\*(C`sysopen\*(C'\fR operator.
The permissions default to 0666.
.Sp
For convenience, \f(CW\*(C`IO::File\*(C'\fR exports the O_XXX constants from the
Fcntl module, if this module is available.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
perlfunc, 
\&\*(L"I/O Operators\*(R" in perlop,
IO::Handle
IO::Seekable
.SH "HISTORY"
.IX Header "HISTORY"
Derived from FileHandle.pm by Graham Barr <\fIgbarr@pobox.com\fR>.