deb-triggers(5) 						  dpkg utilities						   deb-triggers(5)

NAME

       deb-triggers - package triggers

SYNOPSIS

       triggers

DESCRIPTION

       A  package  declares  its  relationship to some trigger(s) by including a triggers file in its control archive (i.e. DEBIAN/triggers during
       package creation).

       This file contains directives, one per line. Leading and trailing whitespace and everything after the first # on any line will be  trimmed,
       and empty lines will be ignored.

       The trigger control directives currently supported are:

	    interest trigger-name

	    interest-noawait trigger-name

	    Specifies that the package is interested in the named trigger. All triggers in which a package is interested must be listed using this
	    directive in the triggers control file. The "noawait" variant does not put the triggering packages	in  triggers-awaited  state.  This
	    should be used when the functionality provided by the trigger is not crucial.

	    activate trigger-name

	    activate-noawait trigger-name

	    Arranges  that  changes to this package's state will activate the specified trigger. The trigger will be activated at the start of the
	    following operations: unpack, configure, remove (including for the benefit of a conflicting  package),  purge  and	deconfigure.   The
	    "noawait"  variant does not put the triggering packages in triggers-awaited state. This should be used when the functionality provided
	    by the trigger is not crucial.

	    If this package disappears during the unpacking of another package the trigger will be  activated  when  the  disappearance  is  noted
	    towards  the end of the unpack. Trigger processing, and transition from triggers-awaited to installed, does not cause activations.	In
	    the case of unpack, triggers mentioned in both the old and new versions of the package will be activated.

       Unknown directives are an error which will prevent installation of the package.

       The "-noawait" variants are only supported by dpkg 1.16.1 or newer, and will lead to errors if used with an older dpkg. It is  thus  recom-
       mended to add a "Pre-Depends: dpkg (>= 1.16.1)" to any package that wish to use those directives.

SEE ALSO

       dpkg-trigger(1), dpkg(1), /usr/share/doc/dpkg-dev/triggers.txt.gz.

Debian Project							    2011-08-14							   deb-triggers(5)