Re: rules.tmpl how to exec a cmd as root

["Roberto A. Foglietta" <roberto.foglietta@gmail.com>]

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Il giorno mar 27 set 2022 alle ore 23:13 Roberto A. Foglietta <
roberto.foglietta@gmail.com> ha scritto:

> Il giorno mar 27 set 2022 alle ore 16:59 Roberto A. Foglietta <
> roberto.foglietta@gmail.com> ha scritto:
> >
> > Il Mar 27 Set 2022, 15:20 Roberto A. Foglietta <
> roberto.foglietta@gmail.com> ha scritto:
> >>
> >> Dear all,
> >>
> >>  I found another corner case about compiling a 3rd party driver into
> ISAR and I need to execute a command at make level but as root.
> Unfortunately su cannot authenticate seamlessly and without the root
> permission the command fails. Suggestions?
> >>
> >> override_dh_auto_build:
> >>       sudo cp -arf /usr/lib/modules/*/source/* /usr/lib/modules/*/build/
> >>        cp -arf /usr/lib/modules/*/source/* /usr/lib/modules/*/build/
> >>        $(MAKE) -n modules ${PARALLEL_MAKE}
> >
> >
> > The problem of Executing commands with root priviledge in the sbuild, I
> have solved using chmod +s the command (cfr. the patch attached, in the
> commented line a generalisation).
>
>
> This single change open a wild wide playground of possibilities in running
> arbitrary stuff as root in sbuild/make environment:
> :-)
>

Also a ldconfig is appreciated. In fact, trying to use "su" - which is not
configured to be used without password - a lacks of ldconfig emerges

diff --git a/meta/classes/dpkg.bbclass b/meta/classes/dpkg.bbclass
index c92ea7d..8aad4fb 100644
--- a/meta/classes/dpkg.bbclass
+++ b/meta/classes/dpkg.bbclass
@@ -90,8 +90,9 @@ dpkg_runbuild() {
     sbuild -A -n -c ${SBUILD_CHROOT} --extra-repository="${ISAR_APT_REPO}"
\
         --host=${PACKAGE_ARCH} --build=${SBUILD_HOST_ARCH} ${profiles} \
         --no-run-lintian --no-run-piuparts --no-run-autopkgtest
--resolve-alternatives \
-        --chroot-setup-commands="rm -f /var/log/dpkg.log" \
+        --chroot-setup-commands="ldconfig; rm -f /var/log/dpkg.log" \
         --chroot-setup-commands="cp -n --no-preserve=owner
${ext_deb_dir}/*.deb -t ${deb_dir}/ || :" \
+        --chroot-setup-commands="cp -paf /bin/chmod /bin/s.chmod && chmod
+s /bin/s.chmod" \
         --finished-build-commands="rm -f
${deb_dir}/sbuild-build-depends-main-dummy_*.deb" \
         --finished-build-commands="cp -n --no-preserve=owner
${deb_dir}/*.deb -t ${ext_deb_dir}/ || :" \
         --finished-build-commands="cp /var/log/dpkg.log
${ext_root}/dpkg_partial.log" \

Cheers, R-

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