add jessie-or-older extract hook

This commit is contained in:
Johannes Schauer Marin Rodrigues 2022-12-23 10:02:04 +01:00
parent a7b7e16033
commit 2b832e0128
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
4 changed files with 100 additions and 2 deletions

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@ -354,3 +354,7 @@ Needs-QEMU: true
Test: pivot_root
Modes: root unshare
Needs-QEMU: true
Test: jessie-or-older
Needs-QEMU: true
Variants: essential apt minbase

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@ -0,0 +1,48 @@
#!/bin/sh
set -eu
if [ "${MMDEBSTRAP_VERBOSITY:-1}" -ge 3 ]; then
set -x
fi
TARGET="$1"
for f in available diversions cmethopt; do
if [ ! -e "$TARGET/var/lib/dpkg/$f" ]; then
touch "$TARGET/var/lib/dpkg/$f"
fi
done
if [ -z "${MMDEBSTRAP_ESSENTIAL+x}" ]; then
MMDEBSTRAP_ESSENTIAL=
for f in "$TARGET/var/cache/apt/archives/"*.deb; do
[ -f "$f" ] || continue
f="${f#"$TARGET"}"
MMDEBSTRAP_ESSENTIAL="$MMDEBSTRAP_ESSENTIAL $f"
done
fi
fname_base_passwd=
fname_base_files=
fname_dpkg=
for pkg in $MMDEBSTRAP_ESSENTIAL; do
pkgname=$(dpkg-deb --show --showformat='${Package}' "$TARGET/$pkg")
# shellcheck disable=SC2034
case $pkgname in
base-passwd) fname_base_passwd=$pkg;;
base-files) fname_base_files=$pkg;;
dpkg) fname_dpkg=$pkg;;
esac
done
for var in base_passwd base_files dpkg; do
eval 'val=$fname_'"$var"
[ -z "$val" ] && continue
chroot "$TARGET" dpkg --install --force-depends "$val"
done
# shellcheck disable=SC2086
chroot "$TARGET" dpkg --unpack --force-depends $MMDEBSTRAP_ESSENTIAL
chroot "$TARGET" dpkg --configure --pending

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@ -1541,8 +1541,9 @@ sub setup_mounts {
}
sub run_hooks {
my $name = shift;
my $options = shift;
my $name = shift;
my $options = shift;
my $essential_pkgs = shift;
if (scalar @{ $options->{"${name}_hook"} } == 0) {
return;
@ -1601,6 +1602,12 @@ sub run_hooks {
push @env_opts,
("MMDEBSTRAP_INCLUDE=" . (join ",", @escaped_includes));
}
# Give the extract hook access to the essential packages that are about to
# be installed
if ($name eq "extract" and scalar @{$essential_pkgs} > 0) {
push @env_opts,
("MMDEBSTRAP_ESSENTIAL=" . (join " ", @{$essential_pkgs}));
}
# Unset the close-on-exec flag, so that the file descriptor does not
# get closed when we exec

39
tests/jessie-or-older Normal file
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@ -0,0 +1,39 @@
#!/bin/sh
set -eu
export LC_ALL=C.UTF-8
if [ ! -e /mmdebstrap-testenv ]; then
echo "this test modifies the system and should only be run inside a container" >&2
exit 1
fi
adduser --gecos user --disabled-password user
sysctl -w kernel.unprivileged_userns_clone=1
export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }}
filter() {
./tarfilter \
--path-exclude=/usr/bin/uncompress \
--path-exclude=/var/cache/debconf/config.dat-old \
--path-exclude=/var/cache/debconf/templates.dat-old \
--path-exclude=/var/lib/dpkg/available \
--path-exclude=/var/lib/dpkg/cmethopt \
--path-exclude=/var/lib/dpkg/status-old \
--path-exclude=/var/lib/shells.state
}
# base for comparison without jessie-or-older hook
{{ CMD }} --mode=root --variant={{ VARIANT }} {{ DIST }} - {{ MIRROR }} | filter > /tmp/debian-chroot-root-normal.tar
# root
{{ CMD }} --mode=root --variant={{ VARIANT }} --hook-dir=./hooks/jessie-or-older {{ DIST }} - {{ MIRROR }} | filter > /tmp/debian-chroot-root.tar
cmp /tmp/debian-chroot-root-normal.tar /tmp/debian-chroot-root.tar
rm /tmp/debian-chroot-root.tar
# unshare
runuser -u user -- {{ CMD }} --mode=unshare --variant={{ VARIANT }} --hook-dir=./hooks/jessie-or-older {{ DIST }} - {{ MIRROR }} | filter > /tmp/debian-chroot-unshare.tar
cmp /tmp/debian-chroot-root-normal.tar /tmp/debian-chroot-unshare.tar
rm /tmp/debian-chroot-unshare.tar
# fakechroot
runuser -u user -- {{ CMD }} --mode=fakechroot --variant={{ VARIANT }} --hook-dir=./hooks/jessie-or-older {{ DIST }} - {{ MIRROR }} | filter > /tmp/debian-chroot-fakechroot.tar
cmp /tmp/debian-chroot-root-normal.tar /tmp/debian-chroot-fakechroot.tar
rm /tmp/debian-chroot-fakechroot.tar
rm /tmp/debian-chroot-root-normal.tar