DWWW-CACHE(8)							      Debian							     DWWW-CACHE(8)

NAME

       dwww-cache - manage the dwww cache of converted documents

SYNOPSIS

       dwww-cache --lookup type location
       dwww-cache --store type location
       dwww-cache --list type location
       dwww-cache --list-all
       dwww-cache --clean

DESCRIPTION

       dwww-cache  manages the cache of converted documents; it is part of dwww(7).  An option (the first argument) specifies the operation.  Some
       operations operate on the whole cache, and need no other arguments.  Others need the second and third argument  to  specify  the  type  and
       pathname of the original document.  (See dwww-convert(8) for more information about the arguments.)

       The operations are:

       --lookup
	      If the document is in the cache, output it to the standard output.  Otherwise, output nothing and return a non-zero status.

       --store
	      Read the document from the standard input, output it to the standard output and store it into the cache.	If there was an older ver-
	      sion already in the cache, remove it.

       --list Output information about one document in the cache to the standard output.  The information is one line, with four  space  delimited
	      fields: type, pathname of original, pathname of cached, and permanent flag (y or n).

       --list-all
	      Like --list, but for all documents.

       --clean
	      Forget all cached documents that have been deleted.

       dwww-cache  maintains  a  database  with information of the cached documents.  The documents themselves are stored in separate files in the
       cache directory.  When old documents are removed from the cache by a suitable crontab entry, they will still exist in the  database.   This
       operation removes all entries from the database where either the original or the converted file is now missing.

       To  stop  the  cache from growing too large, an entry in root's crontab should remove cached files that have not been accessed for a while.
       For example, the following commands remove all documents that have not been accessed for ten days:

	      find /var/cache/dwww -atime +10 | xargs rm -f
	      dwww-cache --clean

       The idea is to first delete the old cached files and then clean up the database.  The policy of cleaning the cache has been kept outside of
       dwww-cache  to  keep  the  program simple, and to allow maximum flexibility.  The default dwww installation creates a /etc/cron.daily/dwww,
       which automatically cleans the cache each day.

FILES

       /var/cache/dwww/db
	      The cache directory.

       /var/cache/dwww/db/.cache_db
	      The database with information about all cached documents.  This is a binary file, specially encoded for small size and  high  speed,
	      and should not be touched by anyone but dwww-cache.

SEE ALSO

       dwww(7), dwww-convert(8).

AUTHOR

       Lars Wirzenius <liw@iki.fi>.  Modified by Robert Luberda <robert@debian.org>.
       See dwww(7) for copyrights and stuff.

dwww 1.11.1							February 15th, 2009						     DWWW-CACHE(8)