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Add qemu-user support for fakechroot and sudo modes

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This commit is contained in:
Johannes 'josch' Schauer 2018-09-18 17:11:02 +02:00
parent 87586fa667
commit 1adac06646
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 40 additions and 1 deletions
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mmdebstrap
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@ -648,8 +648,43 @@ sub setup {
if ($options->{mode} eq 'proot') {
# FIXME: proot currently cannot install apt because of https://github.com/proot-me/PRoot/issues/147
@chrootcmd = ('proot', '--root-id', '--bind=/dev', "--rootfs=$options->{root}", '--cwd=/');
}
# copy qemu-user-static binary into chroot or setup proot with --qemu
if (defined $options->{qemu}) {
if ($options->{mode} eq 'proot') {
push @chrootcmd, "--qemu=qemu-$options->{qemu}";
} elsif ($options->{mode} eq 'fakechroot') {
# The binfmt support on the outside is used, so qemu needs to know
# where it has to look for shared libraries
$ENV{QEMU_LD_PREFIX} = $options->{root};
# Make sure that the fakeroot and fakechroot shared libraries
# exist for the right architecture
open my $fh, '-|', 'dpkg-architecture', '-a', $options->{nativearch}, '-qDEB_HOST_MULTIARCH' // die "failed to fork(): $!";
chomp (my $deb_host_multiarch = do { local $/; <$fh> });
close $fh;
if ($? != 0 or !$deb_host_multiarch) {
die "dpkg-architecture failed: $?";
}
my $fakechrootdir = "/usr/lib/$deb_host_multiarch/fakechroot";
if (!-e "$fakechrootdir/libfakechroot.so") {
die "$fakechrootdir/libfakechroot.so doesn't exist. Install libfakechroot:$options->{nativearch}"
}
my $fakerootdir = "/usr/lib/$deb_host_multiarch/libfakeroot";
if (!-e "$fakerootdir/libfakeroot-sysv.so") {
die "$fakerootdir/libfakeroot-sysv.so doesn't exist. Install libfakeroot:$options->{nativearch}"
}
# fakechroot only fills LD_LIBRARY_PATH with the directories of
# the host's architecture. We append the directories of the chroot
# architecture.
$ENV{LD_LIBRARY_PATH} .= ":$fakechrootdir:$fakerootdir";
} else {
# other modes require a static qemu-user binary
my $qemubin = "/usr/bin/qemu-$options->{qemu}-static";
if (!-e $qemubin) {
die "cannot find $qemubin";
}
copy $qemubin, "$options->{root}/$qemubin";
}
}
@ -808,6 +843,10 @@ sub setup {
0 == system(@chrootcmd, 'apt-get', 'clean') or die "apt-get clean failed: $?";
}
if (defined $options->{qemu} and $options->{mode} ne 'proot' and $options->{mode} ne 'fakechroot') {
unlink "$options->{root}/usr/bin/qemu-$options->{qemu}-static" or die "cannot unlink /usr/bin/qemu-$options->{qemu}-static";
}
# clean up certain files to make output reproducible
unlink "$options->{root}/var/log/dpkg.log";
unlink "$options->{root}/var/log/apt/history.log";