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+# dpkg manual page - dpkg-realpath(1)
+#
+# Copyright © 2020-2021 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/>.
+
+=encoding utf8
+
+=head1 NAME
+
+dpkg-realpath - print the resolved pathname with DPKG_ROOT support
+
+=head1 SYNOPSIS
+
+B<dpkg-realpath> [I<option>...] I<pathname>
+
+=head1 DESCRIPTION
+
+B<dpkg-realpath> is a tool (since dpkg 1.20.1) to resolve a pathname,
+that takes the L<dpkg(1)> root directory into account, either implicitly
+from the B<DPKG_ROOT> environment variable or from the command-line
+B<--root> or B<--instdir> options, and returns an absolute I<pathname>
+relative to the root directory.
+The root directory must not be prefixed to the I<pathname> to be resolved.
+
+This is intended to be used by other B<dpkg> helpers, or by maintainer
+scripts instead of using L<realpath(1)> or L<readlink(1)> to canonicalize
+pathnames, as these latter commands do not support canonicalization
+relative to a different root than F</>.
+
+This program was introduced in dpkg 1.20.1.
+
+=head1 OPTIONS
+
+=over
+
+=item B<-z>, B<--zero>
+
+Use a NUL byte to end output lines instead of a new line character
+(since dpkg 1.20.6).
+
+=item B<--instdir> I<directory>
+
+=item B<--root> I<directory>
+
+Set the root directory to I<directory>, which is the base directory
+that pathnames get canonicalized against.
+Defaults to «B</>» if B<DPKG_ROOT> has not been set.
+
+=item B<-?>, B<--help>
+
+Show the usage message and exit.
+
+=item B<--version>
+
+Show the version and exit.
+
+=back
+
+=head1 ENVIRONMENT
+
+=over
+
+=item B<DPKG_ROOT>
+
+If set and the B<--instdir> or B<--root> options have not been
+specified, it will be used as the filesystem root directory.
+
+=item B<DPKG_COLORS>
+
+Sets the color mode.
+The currently accepted values are: B<auto> (default), B<always> and B<never>.
+
+=back
+
+=head1 SEE ALSO
+
+L<realpath(1)>,
+L<readlink(1)>.