dpkg-trigger(1)

1dpkg-trigger(1)                   dpkg suite                   dpkg-trigger(1)
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NAME

6       dpkg-trigger - a package trigger utility
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SYNOPSIS

9       dpkg-trigger [option...] trigger-name
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11       dpkg-trigger [option...] command
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DESCRIPTION

14       dpkg-trigger is a tool to explicitly activate triggers and check for
15       its support on the running dpkg.
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17       This can be used by maintainer scripts in complex and conditional
18       situations where the file triggers, or the declarative activate
19       triggers control file directive, are insufficiently rich. It can also
20       be used for testing and by system administrators (but note that the
21       triggers won't actually be run by dpkg-trigger).
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23       Unrecognized trigger name syntaxes are an error for dpkg-trigger.
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COMMANDS

26       --check-supported
27           Check if the running dpkg supports triggers (usually called from a
28           postinst). Will exit 0 if a triggers-capable dpkg has run, or 1
29           with an error message to stderr if not. Normally, however, it is
30           better just to activate the desired trigger with dpkg-trigger.
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32       -?, --help
33           Show the usage message and exit.
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35       --version
36           Show the version and exit.
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OPTIONS

39       --admindir=dir
40           Change the location of the dpkg database.  Defaults to
41           /var/lib/dpkg if DPKG_ADMINDIR has not been set.
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43       --root=directory
44           Set the root directory to directory, which sets the administrative
45           directory to «directory/var/lib/dpkg» (since dpkg 1.21.0).
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47       --by-package=package
48           Override trigger awaiter (normally set by dpkg through the
49           DPKG_MAINTSCRIPT_PACKAGE environment variable of the maintainer
50           scripts, naming the package to which the script belongs, and this
51           will be used by default).
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53       --no-await
54           This option arranges that the calling package T (if any) need not
55           await the processing of this trigger; the interested package(s) I,
56           will not be added to T's trigger processing awaited list and T's
57           status is unchanged.  T may be considered installed even though I
58           may not yet have processed the trigger.
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60       --await
61           This option does the inverse of --no-await (since dpkg 1.17.21).
62           If the interested package has declared a “noawait” directive, then
63           this option will not be effective.  It is currently the default
64           behavior.
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66       --no-act
67           Just test, do not actually change anything.
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EXIT STATUS

70       0   The requested action was successfully performed.  Or a check or
71           assertion command returned true.
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73       1   A check or assertion command returned false.
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75       2   Fatal or unrecoverable error due to invalid command-line usage, or
76           interactions with the system, such as accesses to the database,
77           memory allocations, etc.
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ENVIRONMENT

80       DPKG_ROOT
81           If set and the --root option has not been specified, it will be
82           used as the filesystem root directory (since dpkg 1.21.0).
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84       DPKG_ADMINDIR
85           If set and the --admindir option has not been specified, it will be
86           used as the dpkg data directory.
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88       DPKG_COLORS
89           Sets the color mode (since dpkg 1.18.5).  The currently accepted
90           values are: auto (default), always and never.
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