DH_TESTROOT(1) Debhelper DH_TESTROOT(1)
dh_testroot - ensure that a package is built with necessary level of
dh_testroot is used to determine if the target is being run with
sufficient access to (fake)root.
The definition of sufficient access depends on whether the builder (the
tool invoking the debian/rules target) supports the Rules-Requires-Root
(R3) field. If the builder supports R3, then it will set the
environment variable DEB_RULES_REQUIRES_ROOT and dh_testroot will
validate that the builder followed the minimum requirements for the
given value of DEB_RULES_REQUIRES_ROOT.
If the builder does not support Rules-Requires-Root, then it will not
set the DEB_RULES_REQUIRES_ROOT environment variable. This will in
turn make dh_testroot (and the rest of debhelper) fall back to assuming
that (fake)root is implied.
The following is a summary of how dh_testroot behaves based on the
DEB_RULES_REQUIRES_ROOT environment variable (leading and trailing
whitespace in the variable is ignored).
- If unset, or set to "binary-targets", then dh_testroot asserts that
it is run as root or under fakeroot(1).
- If set to "no", then dh_testroot returns successfully (without
performing any additional checks).
- If set to any other value than the above, then dh_testroot asserts
that it is either run as root (or under fakeroot(1)) or the builder
has provided the DEB_GAIN_ROOT_CMD environment variable (e.g. via
Please note that dh_testroot does not read the Rules-Requires-Root
field. Which implies that dh_testroot may produce incorrect result if
the builder lies in DEB_RULES_REQUIRES_ROOT. On the flip side, it also
enables things like testing for what will happen when
DEB_RULES_REQUIRES_ROOT is set to a given value.
This program is a part of debhelper.
Joey Hess <firstname.lastname@example.org>
11.3.5 2018-06-30 DH_TESTROOT(1)