CHANGELOG.md

@@ -1,10 +1,3 @@
-0.8.4 (2022-02-11)
-------------------
-
- - tarfilter: add --strip-components option
- - don't install essential packages in run_install()
- - remove /var/lib/dbus/machine-id
-
 0.8.3 (2022-01-08)
 ------------------
 

coverage.sh

@@ -180,7 +180,6 @@ export SOURCE_DATE_EPOCH=$SOURCE_DATE_EPOCH
 # compared to the one chosen in debootstrap because of different installation
 # order in comparison to the systemd users
 # https://bugs.debian.org/969631
-# we cannot use useradd because passwd is not Essential:yes
 $CMD --variant=$variant --mode=$defaultmode \
 	--essential-hook='if [ $variant = - ]; then echo _apt:*:100:65534::/nonexistent:/usr/sbin/nologin >> "\$1"/etc/passwd; fi' \
 	$dist /tmp/debian-$dist-mm.tar $mirror
@@ -322,18 +321,6 @@ else
 	echo no difference for /etc/shadow- on $dist $variant >&2
 fi
 
-# Because of unreproducible uids (#969631) we created the _apt user ourselves
-# and because passwd is not Essential:yes we didn't use useradd. But passwd
-# since 1:4.11.1+dfsg1-1 will create empty mail files, so we create it too.
-# https://bugs.debian.org/1004710
-if [ $variant = - ]; then
-	if [ -e /tmp/debian-$dist-debootstrap/var/mail/_apt ]; then
-		touch /tmp/debian-$dist-mm/var/mail/_apt
-		chmod 660 /tmp/debian-$dist-mm/var/mail/_apt
-		chown 100:8 /tmp/debian-$dist-mm/var/mail/_apt
-	fi
-fi
-
 # check if the file content differs
 diff --unified --no-dereference --recursive /tmp/debian-$dist-debootstrap /tmp/debian-$dist-mm
 
@@ -755,8 +742,9 @@ fi
 for variant in essential apt minbase buildd important standard; do
 	for format in tar squashfs ext2; do
 		print_header "mode=root/unshare/fakechroot,variant=$variant: check for bit-by-bit identical $format output"
-		# pyc files and man index.db are not reproducible
-		# See #1004557 and #1004558
+		# fontconfig doesn't install reproducibly because differences
+		# in /var/cache/fontconfig/. See
+		# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864082
 		if [ "$variant" = "standard" ]; then
 			echo "skipping test because of #864082" >&2
 			skipped=$((skipped+1))
@@ -858,7 +846,6 @@ cmp /tmp/debian-chroot.tar /tmp/debian-chroot-shiftedback.tar
 # manually adjust uid/gid and compare "tar -t" output
 tar --numeric-owner -tvf /tmp/debian-chroot.tar \
 	| sed 's# 100/0 # 100100/100000 #' \
-	| sed 's# 100/8 # 100100/100008 #' \
 	| sed 's# 0/0 # 100000/100000 #' \
 	| sed 's# 0/5 # 100000/100005 #' \
 	| sed 's# 0/8 # 100000/100008 #' \
@@ -2986,8 +2973,9 @@ fi
 # into /var/cache/apt/archives/partial
 for variant in extract custom essential apt minbase buildd important standard; do
 	print_header "mode=$defaultmode,variant=$variant: compare output with pre-seeded /var/cache/apt/archives"
-	# pyc files and man index.db are not reproducible
-	# See #1004557 and #1004558
+	# fontconfig doesn't install reproducibly because differences
+	# in /var/cache/fontconfig/. See
+	# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864082
 	if [ "$variant" = "standard" ]; then
 		echo "skipping test because of #864082" >&2
 		skipped=$((skipped+1))

mmdebstrap

@@ -23,7 +23,7 @@
 use strict;
 use warnings;
 
-our $VERSION = '0.8.4';
+our $VERSION = '0.8.3';
 
 use English;
 use Getopt::Long;
@@ -2722,18 +2722,13 @@ sub run_install() {
         any { $_ eq $options->{variant} }
         ('required', 'important', 'standard', 'buildd')
     ) {
-        # Many of the priority:required packages are also essential:yes. We
-        # make sure not to select those here to avoid useless "xxx is already
-        # the newest version" messages.
         my $priority;
         if (any { $_ eq $options->{variant} } ('required', 'buildd')) {
-            $priority = '?and(?priority(required),?not(?essential))';
+            $priority = '?priority(required)';
         } elsif ($options->{variant} eq 'important') {
-            $priority = '?and(?or(?priority(required),?priority(important)),'
-              . '?not(?essential))';
+            $priority = '?or(?priority(required),?priority(important))';
         } elsif ($options->{variant} eq 'standard') {
-            $priority = '?and(?or(~prequired,~pimportant,~pstandard),'
-              . '?not(?essential))';
+            $priority = '?or(~prequired,~pimportant,~pstandard)';
         }
         $pkgs_to_install{
             "?narrow("
@@ -2785,9 +2780,6 @@ sub run_install() {
             #
             #  - we can make use of file:// and copy://
             #
-            #  - we can use EDSP solvers without installing apt-utils or other
-            #    solvers inside the chroot
-            #
             # The DPkg::Install::Recursive::force=true workaround can be
             # dropped after this issue is fixed:
             # https://salsa.debian.org/apt-team/apt/-/merge_requests/189
@@ -2923,8 +2915,7 @@ sub run_cleanup() {
         foreach my $fname (
             '/var/log/dpkg.log',             '/var/log/apt/history.log',
             '/var/log/apt/term.log',         '/var/log/alternatives.log',
-            '/var/cache/ldconfig/aux-cache', '/var/log/apt/eipp.log.xz',
-            '/var/lib/dbus/machine-id'
+            '/var/cache/ldconfig/aux-cache', '/var/log/apt/eipp.log.xz'
         ) {
             my $path = "$options->{root}$fname";
             if (!-e $path) {
@@ -6297,7 +6288,11 @@ needs to be able to mount and thus requires C<SYS_CAP_ADMIN>.
 This mode uses Linux user namespaces to allow unprivileged use of chroot and
 creation of files that appear to be owned by the superuser inside the unshared
 namespace. A tarball created in this mode should be bit-by-bit identical to a
-tarball created with the B<root> mode.
+tarball created with the B<root> mode. In Debian, this mode requires the sysctl
+C<kernel.unprivileged_userns_clone> being set to C<1>. The default used to be
+C<0> but was changed to C<1> with linux 5.10.1 or Debian 11 (Bullseye).
+B<SETTING THIS OPTION TO 1 HAS SECURITY IMPLICATIONS>. Refer to
+L<https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=898446>
 
 A directory chroot created with this mode will end up with wrong ownership
 information. For correct ownership information, the directory must be accessed
@@ -6721,7 +6716,7 @@ Performs cleanup tasks, unless B<--skip=cleanup> is used:
 
 =item * Remove all files that were put into the chroot for setup purposes, like F</etc/apt/apt.conf.d/00mmdebstrap>, the temporary apt config and the qemu-user-static binary. This can be disabled using B<--skip=cleanup/mmdebstrap>.
 
-=item * Remove all files that make the result unreproducible, like apt and dpkg logs and caches or F</etc/machine-id> and F</var/lib/dbus/machine-id>. This can be disabled using B<--skip=cleanup/reproducible>
+=item * Remove all files that make the result unreproducible, like apt and dpkg logs and caches or F</etc/machine-id>. This can be disabled using B<--skip=cleanup/reproducible>
 
 =item * Remove everything in F</tmp> inside the chroot. This can be disabled using B<--skip=cleanup/tmp>.
 

tarfilter

@@ -64,10 +64,6 @@ Both types of options use Unix shell-style wildcards:
        ? matches any single character
    [seq] matches any character in seq
   [!seq] matches any character not in seq
-
-Thirdly, strip leading directory components off of tar members. Just as with
-GNU tar --strip-components, tar members that have less or equal components in
-their path are not passed through.
 """
     )
     parser.add_argument(
@@ -94,18 +90,8 @@ their path are not passed through.
         action=PaxFilterAction,
         help="Re-include a pax header after a previous exclusion.",
     )
-    parser.add_argument(
-        "--strip-components",
-        metavar="number",
-        type=int,
-        help="Strip NUMBER leading components from file names",
-    )
     args = parser.parse_args()
-    if (
-        not hasattr(args, "pathfilter")
-        and not hasattr(args, "paxfilter")
-        and not hasattr(args, "strip_components")
-    ):
+    if not hasattr(args, "pathfilter") and not hasattr(args, "paxfilter"):
         from shutil import copyfileobj
 
         copyfileobj(sys.stdin.buffer, sys.stdout.buffer)
@@ -155,11 +141,6 @@ their path are not passed through.
         for member in in_tar:
             if path_filter_should_skip(member):
                 continue
-            if args.strip_components:
-                comps = member.name.split("/")
-                if len(comps) <= args.strip_components:
-                    continue
-                member.name = "/".join(comps[args.strip_components :])
             member.pax_headers = {
                 k: v
                 for k, v in member.pax_headers.items()