1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
.\" dpkg manual page - dpkg-trigger(1)
.\"
.\" Copyright © 2008-2015 Guillem Jover <guillem@debian.org>
.\"
.\" This is free software; you can redistribute it and/or modify
.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation; either version 2 of the License, or
.\" (at your option) any later version.
.\"
.\" This is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program. If not, see <https://www.gnu.org/licenses/>.
.
.TH dpkg\-trigger 1 "%RELEASE_DATE%" "%VERSION%" "dpkg suite"
.nh
.SH NAME
dpkg\-trigger \- a package trigger utility
.
.SH SYNOPSIS
.B dpkg\-trigger
.RI [ option "...] " trigger-name
.br
.B dpkg\-trigger
.RI [ option "...] " command
.
.SH DESCRIPTION
\fBdpkg\-trigger\fP is a tool to explicitly activate triggers and check
for its support on the running \fBdpkg\fP.
.PP
This can be used by maintainer scripts in complex and conditional
situations where the file triggers, or the declarative \fBactivate\fP
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 \fBdpkg\-trigger\fP).
.PP
Unrecognized trigger name syntaxes are an error for \fBdpkg\-trigger\fP.
.
.SH COMMANDS
.TP
.B \-\-check\-supported
Check if the running \fBdpkg\fP supports triggers (usually called from a
postinst). Will exit \fB0\fP if a triggers-capable \fBdpkg\fP has run,
or \fB1\fP with an error message to stderr if not. Normally, however,
it is better just to activate the desired trigger with \fBdpkg\-trigger\fP.
.TP
.BR \-? ", " \-\-help
Show the usage message and exit.
.TP
.B \-\-version
Show the version and exit.
.
.SH OPTIONS
.TP
.BI \-\-admindir= dir
Change the location of the \fBdpkg\fR database. The default location is
\fI%ADMINDIR%\fP.
.TP
.BI \-\-by\-package= package
Override trigger awaiter (normally set by \fBdpkg\fP through the
\fBDPKG_MAINTSCRIPT_PACKAGE\fP environment variable of the maintainer scripts,
naming the package to which the script belongs, and this will be used
by default).
.TP
.B \-\-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.
.TP
.B \-\-await
This option does the inverse of \fB\-\-no\-await\fP (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.
.TP
.B \-\-no\-act
Just test, do not actually change anything.
.
.SH EXIT STATUS
.TP
.B 0
The requested action was successfully performed.
Or a check or assertion command returned true.
.TP
.B 1
A check or assertion command returned false.
.TP
.B 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.
.
.SH ENVIRONMENT
.TP
.B DPKG_ADMINDIR
If set and the \fB\-\-admindir\fP option has not been specified, it will
be used as the \fBdpkg\fP data directory.
.TP
.B DPKG_COLORS
Sets the color mode (since dpkg 1.18.5).
The currently accepted values are: \fBauto\fP (default), \fBalways\fP and
\fBnever\fP.
.
.SH SEE ALSO
.BR dpkg (1),
.BR deb\-triggers (5),
.\" FIXME: Unhardcode the pathname, and use dpkg instead of dpkg-dev.
.BR /usr/share/doc/dpkg\-dev/triggers.txt.gz .
|
