apt-config(8)

NAME

   apt-config - APT Configuration Query program

SYNOPSIS

   apt-config [--empty] [--format '%f "%v";%n'] [-o=config_string]
              [-c=config_file] {shell | dump | {-v | --version} |
              {-h | --help}}

DESCRIPTION

   apt-config is an internal program used by various portions of the APT
   suite to provide consistent configurability. It accesses the main
   configuration file /etc/apt/apt.conf in a manner that is easy to use
   for scripted applications.

   Unless the -h, or --help option is given, one of the commands below
   must be present.

   shell
       shell is used to access the configuration information from a shell
       script. It is given pairs of arguments, the first being a shell
       variable and the second the configuration value to query. As output
       it lists shell assignment commands for each value present. In a
       shell script it should be used as follows:

           OPTS="-f"
           RES=`apt-config shell OPTS MyApp::options`
           eval $RES
       This will set the shell environment variable $OPTS to the value of
       MyApp::options with a default of -f.

       The configuration item may be postfixed with a /[fdbi]. f returns
       file names, d returns directories, b returns true or false and i
       returns an integer. Each of the returns is normalized and verified
       internally.

   dump
       Just show the contents of the configuration space.

OPTIONS

   All command line options may be set using the configuration file, the
   descriptions indicate the configuration option to set. For boolean
   options you can override the config file by using something like
   -f-,--no-f, -f=no or several other variations.

   --empty
       Include options which have an empty value. This is the default, so
       use --no-empty to remove them from the output.

   --format '%f "%v";%n'
       Defines the output of each config option. %t will be replaced with
       its individual name, %f with its full hierarchical name and %v with
       its value. Use uppercase letters and special characters in the
       value will be encoded to ensure that it can e.g. be safely used in
       a quoted-string as defined by RFC822. Additionally %n will be
       replaced by a newline, and %N by a tab. A % can be printed by using
       %%.

   -h, --help
       Show a short usage summary.

   -v, --version
       Show the program version.

   -c, --config-file
       Configuration File; Specify a configuration file to use. The
       program will read the default configuration file and then this
       configuration file. If configuration settings need to be set before
       the default configuration files are parsed specify a file with the
       APT_CONFIG environment variable. See apt.conf(5) for syntax
       information.

   -o, --option
       Set a Configuration Option; This will set an arbitrary
       configuration option. The syntax is -o Foo::Bar=bar.  -o and
       --option can be used multiple times to set different options.

SEE ALSO

   apt.conf(5)

DIAGNOSTICS

   apt-config returns zero on normal operation, decimal 100 on error.

BUGS

   APT bug page[1]. If you wish to report a bug in APT, please see
   /usr/share/doc/debian/bug-reporting.txt or the reportbug(1) command.

AUTHORS

   Jason Gunthorpe

   APT team

NOTES

    1. APT bug page
       http://bugs.debian.org/src:apt

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