CONTENTS

• NAME
• SYNOPSIS
• DESCRIPTION
• CAVEATS
• BUGS

#NAME

FileCache - keep more files open than the system permits

#SYNOPSIS

use FileCache;# oruse FileCache maxopen => 16;cacheout $path;print $path @data;cacheout $mode, $path;print $path @data;

#DESCRIPTION

Thecacheout function will make sure that there's a filehandle open for reading or writing available as the pathname you give it. It automatically closes and re-opens files if you exceed your system's maximum number of file descriptors, or the suggested maximum.

#cacheout EXPR

The 1-argument form of cacheout will open a file for writing ('>') on it's first use, and appending ('>>') thereafter.

#cacheout MODE, EXPR

The 2-argument form of cacheout will use the supplied mode for the initial and subsequent openings. Most valid modes for 3-argumentopen are supported namely;'>','+>','<','<+','>>', '|-' and '-|'

#CAVEATS

If you use cacheout with'|-' or'-|' you should catch SIGPIPE and explicitly close the filehandle., when it is closed from the other end some cleanup needs to be done.

While it is permissible toclose a FileCache managed file, do not do so if you are callingFileCache::cacheout from a package other than which it was imported, or with another module which overridesclose. If you must, useFileCache::cacheout_close.

#BUGS

sys/param.h lies with itsNOFILE define on some systems, so you may have to set maxopen ($FileCache::cacheout_maxopen) yourself.

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