1DEBCONF-APT-PROGRESS(1)             Debconf            DEBCONF-APT-PROGRESS(1)
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NAME

6       debconf-apt-progress - install packages using debconf to display a
7       progress bar
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SYNOPSIS

10        debconf-apt-progress [--] command [args ...]
11        debconf-apt-progress --config
12        debconf-apt-progress --start
13        debconf-apt-progress --from waypoint --to waypoint [--] command [args ...]
14        debconf-apt-progress --stop
15

DESCRIPTION

17       debconf-apt-progress installs packages using debconf to display a
18       progress bar. The given command should be any command-line apt
19       frontend; specifically, it must send progress information to the file
20       descriptor selected by the "APT::Status-Fd" configuration option, and
21       must keep the file descriptors nominated by the "APT::Keep-Fds"
22       configuration option open when invoking debconf (directly or
23       indirectly), as those file descriptors will be used for the debconf
24       passthrough protocol.
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26       The arguments to the command you supply should generally include -y
27       (for apt-get or aptitude) or similar to avoid the apt frontend
28       prompting for input. debconf-apt-progress cannot do this itself because
29       the appropriate argument may differ between apt frontends.
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31       The --start, --stop, --from, and --to options may be used to create a
32       progress bar with multiple segments for different stages of
33       installation, provided that the caller is a debconf confmodule. The
34       caller may also interact with the progress bar itself using the debconf
35       protocol if it so desires.
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37       debconf locks its config database when it starts up, which makes it
38       unfortunately inconvenient to have one instance of debconf displaying
39       the progress bar and another passing through questions from packages
40       being installed. If you're using a multiple-segment progress bar,
41       you'll need to eval the output of the --config option before starting
42       the debconf frontend to work around this. See "EXAMPLES" in the
43       EXAMPLES section below.
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OPTIONS

46       --config
47           Print environment variables necessary to start up a progress bar
48           frontend.
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50       --start
51           Start up a progress bar, running from 0 to 100 by default. Use
52           --from and --to to use other endpoints.
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54       --from waypoint
55           If used with --start, make the progress bar begin at waypoint
56           rather than 0.
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58           Otherwise, install packages with their progress bar beginning at
59           this "waypoint". Must be used with --to.
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61       --to waypoint
62           If used with --start, make the progress bar end at waypoint rather
63           than 100.
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65           Otherwise, install packages with their progress bar ending at this
66           "waypoint". Must be used with --from.
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68       --stop
69           Stop a running progress bar.
70
71       --no-progress
72           Avoid starting, stopping, or stepping the progress bar. Progress
73           messages from apt, media change events, and debconf questions will
74           still be passed through to debconf.
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76       --dlwaypoint percentage
77           Specify what percent of the progress bar to use for downloading
78           packages.  The remainder will be used for installing packages. The
79           default is to use 15% for downloading and the remaining 85% for
80           installing.
81
82       --logfile file
83           Send the normal output from apt to the given file.
84
85       --logstderr
86           Send the normal output from apt to stderr. If you supply neither
87           --logfile nor --logstderr, the normal output from apt will be
88           discarded.
89
90       --  Terminate options. Since you will normally need to give at least
91           the -y argument to the command being run, you will usually need to
92           use -- to prevent that being interpreted as an option to debconf-
93           apt-progress itself.
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EXAMPLES

96       Install the GNOME desktop and an X window system development
97       environment within a progress bar:
98
99        debconf-apt-progress -- aptitude -y install gnome x-window-system-dev
100
101       Install the GNOME, KDE, and XFCE desktops within a single progress bar,
102       allocating 45% of the progress bar for each of GNOME and KDE and the
103       remaining 10% for XFCE:
104
105        #! /bin/sh
106        set -e
107        case $1 in
108          '')
109            eval "$(debconf-apt-progress --config)"
110            "$0" debconf
111            ;;
112          debconf)
113            . /usr/share/debconf/confmodule
114            debconf-apt-progress --start
115            debconf-apt-progress --from 0 --to 45 -- apt-get -y install gnome
116            debconf-apt-progress --from 45 --to 90 -- apt-get -y install kde
117            debconf-apt-progress --from 90 --to 100 -- apt-get -y install xfce4
118            debconf-apt-progress --stop
119            ;;
120        esac
121

RETURN CODE

123       The exit code of the specified command is returned, unless the user hit
124       the cancel button on the progress bar. If the cancel button was hit, a
125       value of 30 is returned. To avoid ambiguity, if the command returned
126       30, a value of 3 will be returned.
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AUTHORS

129       Colin Watson <cjwatson@debian.org>
130
131       Joey Hess <joeyh@debian.org>
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135                                  2020-01-28           DEBCONF-APT-PROGRESS(1)
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