add --skip=chroot/start-stop-daemon and --skip=chroot/policy-rc.d

coverage.txt

@@ -264,6 +264,8 @@ Test: not-having-to-install-apt-in-include-because-a-hook-did-it-before
 
 Test: remove-start-stop-daemon-and-policy-rc-d-in-hook
 
+Test: skip-start-stop-daemon-policy-rc
+
 Test: compare-output-with-pre-seeded-var-cache-apt-archives
 Needs-QEMU: true
 Variants: any

mmdebstrap

@@ -1426,6 +1426,9 @@ sub run_chroot {
         # existing inside the chroot
         #
         # See #911290 for more problems of this interface
+        if (any { $_ eq 'chroot/policy-rc.d' } @{ $options->{skip} }) {
+            info "skipping chroot/policy-rc.d as requested";
+        } else {
             if (-d "$options->{root}/usr/sbin/") {
                 open my $fh, '>', "$options->{root}/usr/sbin/policy-rc.d"
                   or error "cannot open policy-rc.d: $!";
@@ -1435,11 +1438,16 @@ sub run_chroot {
                 chmod 0755, "$options->{root}/usr/sbin/policy-rc.d"
                   or error "cannot chmod policy-rc.d: $!";
             }
+        }
 
         # the file might not exist if it was removed in a hook
+        if (any { $_ eq 'chroot/start-stop-daemon' } @{ $options->{skip} }) {
+            info "skipping chroot/start-stop-daemon as requested";
+        } else {
             if (-f "$options->{root}/sbin/start-stop-daemon") {
                 if (-e "$options->{root}/sbin/start-stop-daemon.REAL") {
-                error "$options->{root}/sbin/start-stop-daemon.REAL already"
+                    error
+                      "$options->{root}/sbin/start-stop-daemon.REAL already"
                       . " exists";
                 }
                 move(
@@ -1449,26 +1457,36 @@ sub run_chroot {
                 open my $fh, '>', "$options->{root}/sbin/start-stop-daemon"
                   or error "cannot open start-stop-daemon: $!";
                 print $fh "#!/bin/sh\n";
-            print $fh "echo \"Warning: Fake start-stop-daemon called, doing"
+                print $fh
+                  "echo \"Warning: Fake start-stop-daemon called, doing"
                   . " nothing\">&2\n";
                 close $fh;
                 chmod 0755, "$options->{root}/sbin/start-stop-daemon"
                   or error "cannot chmod start-stop-daemon: $!";
             }
+        }
 
         &{$cmd}();
 
         # cleanup
+        if (any { $_ eq 'chroot/start-stop-daemon' } @{ $options->{skip} }) {
+            info "skipping chroot/start-stop-daemon as requested";
+        } else {
             if (-e "$options->{root}/sbin/start-stop-daemon.REAL") {
                 move(
                     "$options->{root}/sbin/start-stop-daemon.REAL",
                     "$options->{root}/sbin/start-stop-daemon"
                 ) or error "cannot move start-stop-daemon: $!";
             }
+        }
+        if (any { $_ eq 'chroot/policy-rc.d' } @{ $options->{skip} }) {
+            info "skipping chroot/policy-rc.d as requested";
+        } else {
             if (-f "$options->{root}/usr/sbin/policy-rc.d") {
                 unlink "$options->{root}/usr/sbin/policy-rc.d"
                   or error "cannot unlink policy-rc.d: $!";
             }
+        }
 
     };
 
@@ -6765,6 +6783,12 @@ out in B<extract> mode.
 Run B<--customize-hook> options and all F<customize*> scripts in B<--hook-dir>.
 This step is not carried out in B<extract> mode.
 
+For each command that is run inside the chroot, B<mmdebstrap> will disable
+running services by temporarily moving F</usr/sbin/policy-rc.d> and
+F</sbin/start-stop-daemon> if they exist. This can be disabled with
+B<--skip=chroot/policy-rc.d> and B<--skip=chroot/start-stop-daemon>,
+respectively.
+
 =item B<cleanup>
 
 Performs cleanup tasks, unless B<--skip=cleanup> is used:

tests/skip-start-stop-daemon-policy-rc

@@ -0,0 +1,10 @@
+#!/bin/sh
+set -eu
+export LC_ALL=C.UTF-8
+trap "rm -f /tmp/debian-chroot.tar" EXIT INT TERM
+{{ CMD }} --mode={{ MODE }} --variant=apt \
+	--skip=chroot/start-stop-daemon,chroot/policy-rc.d \
+	--customize-hook='test ! -e "$1/sbin/start-stop-daemon.REAL"' \
+	--customize-hook='test ! -e "$1/usr/sbin/policy-rc.d"' \
+	{{ DIST }} /tmp/debian-chroot.tar {{ MIRROR }}
+tar -tf /tmp/debian-chroot.tar | sort | diff -u tar1.txt -