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#!/usr/bin/perl
=encoding UTF-8
=head1 NAME
dh_testroot - ensure that a package is built with necessary level of root permissions
=head1 SYNOPSIS
B<dh_testroot> [S<I<debhelper options>>]
=head1 DESCRIPTION
B<dh_testroot> is used to determine if the package has access to at
least the level of root access that it declared it needed via the
Rules-Requires-Root (R³) field.
The following is how B<dh_testroot> behaves based on the effective
value of the R³ field:
=over 4
=item "binary-targets"
B<dh_testroot> asserts that it is run as root or under L<fakeroot(1)>.
=item "no"
B<dh_testroot> returns successfully.
=item Any other value than the above
B<dh_testroot> asserts that it is either run as root (or under
L<fakeroot(1)>) or the builder has provided the B<DPKG_GAIN_ROOT_CMD>
environment variable (e.g. via dpkg-buildpackage -r).
=back
For backwards compatibility, B<dh_testroot> will consider the absence
of the R³ field as if the R³ field was set to "binary-targets".
=cut
use strict;
use warnings;
use Debian::Debhelper::Dh_Lib;
our $VERSION = DH_BUILTIN_VERSION;
inhibit_log();
my $requirements = 'legacy-root';
if (-f 'debian/control') {
$requirements = Debian::Debhelper::Dh_Lib::root_requirements();
} else {
warning('dh_testroot must be called from the source root');
}
# By declaration; nothing requires root and this command must be a no-op in that case.
exit 0 if $requirements eq 'none';
# The builder /can/ choose to ignore the requirements and just call us as root.
# If so, we do not bother checking the requirements any further.
exit 0 if $< == 0;
if ($requirements eq 'legacy-root') {
error("You must run this as root (or use fakeroot).");
} else {
my $env = $ENV{'DPKG_GAIN_ROOT_CMD'};
error("Package needs targetted root but builder has not provided a gain-root command via \${DPKG_GAIN_ROOT_CMD}")
if not $env;
}
=head1 SEE ALSO
L<debhelper(7)>
This program is a part of debhelper.
=head1 AUTHOR
Joey Hess <joeyh@debian.org>
=cut
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