dpkg-vendor --version (return code: 0)
Debian dpkg-vendor version 1.18.4.
This is free software; see the GNU General Public License version 2 or
later for copying conditions. There is NO warranty.
dpkg-vendor --help (return code: 0)
Usage: dpkg-vendor [<option>...] [<command>]
Commands:
--is <vendor> returns true if current vendor is <vendor>.
--derives-from <vendor> returns true if current vendor derives from <vendor>.
--query <field> print the content of the vendor-specific field.
--help show this help message.
--version show the version.
Options:
--vendor <vendor> assume <vendor> is the current vendor.