dpkg-trigger - a package trigger utility
dpkg-trigger [option...] trigger-name
dpkg-trigger [option...] command
dpkg-trigger is a tool to explicitly activate triggers and
check for its support on the running dpkg.
This can be used by maintainer scripts in complex and conditional
situations where the file triggers, or the declarative activate
triggers control file directive, are insufficiently rich. It can also be
used for testing and by system administrators (but note that the triggers
won't actually be run by dpkg-trigger).
Unrecognized trigger name syntaxes are an error for
dpkg-trigger.
- --check-supported
- Check if the running dpkg supports triggers (usually called from a
postinst). Will exit 0 if a triggers-capable dpkg has run,
or 1 with an error message to stderr if not. Normally, however, it
is better just to activate the desired trigger with
dpkg-trigger.
- -?, --help
- Show the usage message and exit.
- --version
- Show the version and exit.
- --admindir=dir
- Change the location of the dpkg database. The default location is
/var/lib/dpkg.
- --by-package=package
- Override trigger awaiter (normally set by dpkg through the
DPKG_MAINTSCRIPT_PACKAGE environment variable of the maintainer
scripts, naming the package to which the script belongs, and this will be
used by default).
- --no-await
- This option arranges that the calling package T (if any) need not
await the processing of this trigger; the interested package(s) I,
will not be added to T's trigger processing awaited list and
T's status is unchanged. T may be considered installed even
though I may not yet have processed the trigger.
- --await
- This option does the inverse of --no-await (since dpkg 1.17.21). If
the interested package has declared a “noawait” directive,
then this option will not be effective. It is currently the default
behavior.
- --no-act
- Just test, do not actually change anything.
- 0
- The requested action was successfully performed. Or a check or assertion
command returned true.
- 1
- A check or assertion command returned false.
- 2
- Fatal or unrecoverable error due to invalid command-line usage, or
interactions with the system, such as accesses to the database, memory
allocations, etc.
- DPKG_ADMINDIR
- If set and the --admindir option has not been specified, it will be
used as the dpkg data directory.
- DPKG_COLORS
- Sets the color mode (since dpkg 1.18.5). The currently accepted values
are: auto (default), always and never.