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FileCache(3)
NAME
  FileCache - keep more files open than the system permits

SYNOPSIS
      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  '-|'

      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".

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

NOTES
  FileCache installs signal handlers for CHLD (a.k.a. CLD) and PIPE in the
  calling package to handle deceased children from 2-arg "cacheout" with '|-'
  or '-|' expediently. The children would otherwise be reaped eventually,
  unless you terminated before repeatedly calling cacheout.

Index for Section 3

Alphabetical listing for F

Top of page