Apache Portable Runtime

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LEARN ABOUT REDHAT

apr::perlio

PERLIO(1)						User Contributed Perl Documentation						 PERLIO(1)

NAME

       APR:PerlIO -- An APR Perl IO layer

SYNOPSIS

	 use APR::PerlIO ();

	 sub handler {
	     my $r = shift;

	     open my $fh, ">:APR", $filename, $r or die $!;
	     # work with $fh as normal $fh
	     close $fh;

	     return Apache::OK;
	 }

DESCRIPTION

       "APR::PerlIO" implements a Perl IO layer using APR's file manipulation as its internals.

       Why do you want to use this? Normally you shouldn't, probably it won't be faster than Perl's default layer. It's only useful when you need
       to manipulate a filehandle opened at the APR side, while using Perl.

       Normally you won't call open() with APR layer attribute, but some mod_perl functions will return a filehandle which is internally hooked to
       APR. But you can use APR Perl IO directly if you want.

METHODS

       Perl Interface:

       open()
	   To use APR Perl IO to open a file the four arguments open() should be used. For example:

	     open my $fh, ">:APR", $filename, $r or die $!;

	   where:

	   the second argument is the mode to open the file, constructed from two sections separated by the ":" character: the first section is
	   the mode to open the file under (>, <, etc) and the second section must be a string APR.

	   the fourth argument can be a "Apache::RequestRec" or "Apache::ServerRec" object.

	   the rest of the arguments are the same as described by the open() manpage.

       seek()
	     seek($fh, $offset, $whence);

	   If $offset is zero, "seek()" works normally.

	   However if $offset is non-zero and Perl has been compiled with with large files support ("-Duselargefiles"), whereas APR wasn't, this
	   function will croak. This is because largefile size "Off_t" simply cannot fit into a non-largefile size "apr_off_t".

	   To solve the problem, rebuild Perl with "-Uuselargefiles". Currently there is no way to force APR to build with large files support.

       The C interface provides functions to convert between Perl IO and APR Perl IO filehandles.

SEE ALSO

       The perliol(1), perlapio(1) and perl(1) manpages.

perl v5.8.0							    2002-06-05								 PERLIO(1)

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