ck4up man page on DragonFly

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ck4up(1)							      ck4up(1)

NAME
       ck4up - Check for Updates, a utility to monitor web pages for updates

SYNOPSIS
       ck4up [options] [<regexp> ...]

DESCRIPTION
       ck4up  is  a  small  command-line  utility,  written in ruby, primarily
       intended for CRUX ports maintainers to watch http  and  ftp  sites  for
       updates, but may also be useful for others.

       ck4up  scans through a configuration file, fetches the listed URLs from
       the web, computes the md5sum of the page, and compares the  value  with
       one stored in a gdbm database. If both differ a message will be written
       to the standard output.

       To improve performance, ck4up is multi-threaded. A configurable	number
       of  threads fetches pages in parallel. The default setting is a maximum
       of 20 threads and can be changed at the top  of	the  script  (variable
       Threads_max).

       Regular expressions can be applied to each page in the event that ck4up
       produces repetitive diff messages. For example, if daily snapshots  and
       a web counter are on the same page.

       To  simplify  maintenance  of  the configuration file, a kind of macro-
       expansion can be used.

OPTIONS
       -d, --debug
	      Run ck4up in debug mode. All fetched pages will  be  written  to
	      the  standard  output.  This  is especially useful when combined
	      with a regexp to limit the number of pages to process.

       -k, --keep
	      Keep md5 values, don't update the database.

       -v, --verbose
	      Verbose mode. Print a message also for unchanged pages.

       -h, --help
	      Print a short help message and exit.

       -p, --parseonly
	      Parse configuration file, expand macros and print lines  matched
	      by <regexp>.  Do not fetch any remote data.

       -c, --cleandb
	      Removes unused entries from the ck4up database.

       -f <file>, --config <file>
	      Use alternative configuration from <file> instead of the default
	       ~/.ck4up/ck4up.conf.   ck4up  creates  a database with the same
	      full pathname but the extension replaced by .dbm.

       <regexp>
	      Process only configuration-lines matching <regexp>. If more than
	      one  expression is given, all of them are or'ed to build a regu‐
	      lar expression.

CONFIGURATION
       The configuration file for ck4up contains lines with macro  definitions
       and  lines  defining  URLs to check for updates.	 Blank lines and lines
       beginning  with	a  pound-sign,	which  are  considered	comments,  are
       ignored. Spaces at the beginning of definition-lines are not allowed.
       The   default   location	  for	the   ck4up   configuration   file  is
       ~/.ck4up/ck4up.conf.

       <name> <type> <url> [<regexp>]

       Lines starting with a valid character in the  range  [a-zA-Z]  are  URL
       lines,  defining	 the  web-pages	 you  would like to check for updates.
       <name> is a symbolic name for the URL, md5 is the only valid entry  for
       <type>  at the moment, <url> is the URL of the web-site, <regexp> is an
       optionally extended regular expression.	Don't use spaces  in  regexps,
       but \s instead.

       Examples:

       apache  md5  http://www.apache.de/dist/httpd/	httpd-2[0-9.]*
       uw-imap md5  ftp://ftp.cac.washington.edu/imap/

       <@[A-Za-z0-9_]*@> <string> [<string>]

       Lines  starting	with  @	 define	 macros for later use.	A system macro
       @NAME@, which is the <name> of the URL line, can be used in other macro
       definitions.   This  is	handy if many URLs follow a common syntax. See
       the examples for @SF@ and  @GNOME@  below.   Macro  expansion  is  done
       recursively,  allowing macros to be nested.  See the @FM@ example below
       which makes use of freshmeat's XML project database.

EXAMPLE
       Example of a configuration file containing URL and macro definitions:

       @SUN@	 http://mirrors.sunsite.dk
       @SFgrp@	 http://sourceforge.net/project/showfiles.php?group_id=
       @SFpkg@	 &package_id=
       @GNOME@	 http://ftp.gnome.org/pub/gnome/sources/@NAME@/2.4/

       @TAR@	 @NAME@-.*?\.tar\.[bg]z2?

       @FM_url@	 http://freshmeat.net/projects-xml/@NAME@/@NAME@.xml
       @FM_reg@	 <latest_release_version>.*</latest_release_version>
       @FM@	 @FM_url@ @FM_reg@
       @GNU@	 http://ftp.gnu.org/gnu/@NAME@	 @TAR@

       apache	    md5	 http://www.apache.de/dist/httpd/   httpd-2[0-9.]*
       crux	    md5	 @FM@
       exim	    md5	 @SUN@/exim/exim/exim4/		    @TAR@
       gawk	    md5	 @GNU@
       maildrop	    md5	 @SFgrp@5404@SFpkg@7979		    @TAR@
       gnome-panel  md5	 @GNOME@
       uw-imap	    md5	 ftp://ftp.cac.washington.edu/imap/ imap-200.?[a-z]*

PROXY
       If a environment variable HTTP_PROXY or http_proxy is set with a	 valid
       URI, e.g. http://server.localnet:3128/, ck4up make use of the proxy for
       the HTTP and HTTPS protocols.

FILES
       ~/.ck4up/ck4up.conf - configuration-file
       ~/.ck4up/ck4up.dbm - gdbm database to store the md5 hashes

AUTHOR
       Juergen Daubert <jue@jue.li>

ck4up 1.3			  Apr 08 2014			      ck4up(1)
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