FileCache - phpMan

NAME
    FileCache - keep more files open than the system permits

SYNOPSIS
        no strict 'refs';

        use FileCache;
        # or
        use FileCache maxopen => 16;

        cacheout $mode, $path;
        # or
        cacheout $path;
        print $path @data;

        $fh = cacheout $mode, $path;
        # or
        $fh = cacheout $path;
        print $fh @data;

DESCRIPTION
    The "cacheout" 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 *maxopen*.

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

        Returns EXPR on success for convenience. You may neglect the return
        value and manipulate EXPR as the filehandle directly if you prefer.

    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-argument
        "open" are supported namely; '>', '+>', '<', '<+', '>>', '|-' and
        '-|'

        To pass supplemental arguments to a program opened with '|-' or '-|'
        append them to the command string as you would system EXPR.

        Returns EXPR on success for convenience. You may neglect the return
        value and manipulate EXPR as the filehandle directly if you prefer.

CAVEATS
    While it is permissible to "close" a FileCache managed file, do not do
    so if you are calling "FileCache::cacheout" from a package other than
    which it was imported, or with another module which overrides "close".
    If you must, use "FileCache::cacheout_close".

    Although FileCache can be used with piped opens ('-|' or '|-') doing so
    is strongly discouraged. If FileCache finds it necessary to close and
    then reopen a pipe, the command at the far end of the pipe will be
    reexecuted - the results of performing IO on FileCache'd pipes is
    unlikely to be what you expect. The ability to use FileCache on pipes
    may be removed in a future release.

    FileCache does not store the current file offset if it finds it
    necessary to close a file. When the file is reopened, the offset will be
    as specified by the original "open" file mode. This could be construed
    to be a bug.

    The module functionality relies on symbolic references, so things will
    break under 'use strict' unless 'no strict "refs"' is also specified.

BUGS
    sys/param.h lies with its "NOFILE" define on some systems, so you may
    have to set *maxopen* yourself.