forked from josch/mmdebstrap
add --skip=chroot/mount and --skip=chroot/mount/dev, --skip=chroot/mount/proc, --skip=chroot/mount/sys
This commit is contained in:
parent
e61e352f67
commit
add9412a47
GPG key ID:
F2CBA5C78FBD83E1
3 changed files with 126 additions and 91 deletions
|
|
@ -266,6 +266,9 @@ Test: remove-start-stop-daemon-and-policy-rc-d-in-hook
|
||||||
|
|
||||||
Test: skip-start-stop-daemon-policy-rc
|
Test: skip-start-stop-daemon-policy-rc
|
||||||
|
|
||||||
|
Test: skip-mount
|
||||||
|
Modes: unshare
|
||||||
|
|
||||||
Test: compare-output-with-pre-seeded-var-cache-apt-archives
|
Test: compare-output-with-pre-seeded-var-cache-apt-archives
|
||||||
Needs-QEMU: true
|
Needs-QEMU: true
|
||||||
Variants: any
|
Variants: any
|
||||||
|
|
|
||||||
202
mmdebstrap
202
mmdebstrap
|
|
@ -1104,8 +1104,10 @@ sub run_chroot {
|
||||||
}
|
}
|
||||||
} elsif ($type == 3 or $type == 4) {
|
} elsif ($type == 3 or $type == 4) {
|
||||||
# character/block special
|
# character/block special
|
||||||
if ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
if (any { $_ =~ '^chroot/mount(?:/dev)?$' }
|
||||||
&& !$options->{canmount}) {
|
@{ $options->{skip} }) {
|
||||||
|
info "skipping chroot/mount/dev as requested";
|
||||||
|
} elsif (!$options->{canmount}) {
|
||||||
warning "skipping bind-mounting ./dev/$fname";
|
warning "skipping bind-mounting ./dev/$fname";
|
||||||
} elsif (!$options->{havemknod}) {
|
} elsif (!$options->{havemknod}) {
|
||||||
if (!-d "$options->{root}/dev") {
|
if (!-d "$options->{root}/dev") {
|
||||||
|
|
@ -1160,96 +1162,102 @@ sub run_chroot {
|
||||||
"$options->{root}/dev/$fname")
|
"$options->{root}/dev/$fname")
|
||||||
or error "mount ./dev/$fname failed: $?";
|
or error "mount ./dev/$fname failed: $?";
|
||||||
}
|
}
|
||||||
} elsif ($type == 5
|
} elsif ($type == 5) {
|
||||||
&& (any { $_ eq $options->{mode} } ('root', 'unshare'))
|
# directory
|
||||||
&& !$options->{canmount}) {
|
if (any { $_ =~ '^chroot/mount(?:/dev)?$' }
|
||||||
warning "skipping bind-mounting ./dev/$fname";
|
@{ $options->{skip} }) {
|
||||||
} elsif ($type == 5) { # directory
|
info "skipping chroot/mount/dev as requested";
|
||||||
if (!-d "$options->{root}/dev") {
|
} elsif (!$options->{canmount}) {
|
||||||
warning(
|
warning "skipping bind-mounting ./dev/$fname";
|
||||||
"skipping creation of ./dev/$fname because the"
|
|
||||||
. " /dev directory is missing in the target");
|
|
||||||
next;
|
|
||||||
}
|
|
||||||
if (!-e "/dev/$fname" && $fname ne "pts/") {
|
|
||||||
warning("skipping creation of ./dev/$fname because"
|
|
||||||
. " /dev/$fname does not exist"
|
|
||||||
. " on the outside");
|
|
||||||
next;
|
|
||||||
}
|
|
||||||
if (!-d "/dev/$fname" && $fname ne "pts/") {
|
|
||||||
warning("skipping creation of ./dev/$fname because"
|
|
||||||
. " /dev/$fname on the outside is not a"
|
|
||||||
. " directory");
|
|
||||||
next;
|
|
||||||
}
|
|
||||||
if (!$options->{havemknod}) {
|
|
||||||
# If had mknod, then the directory to bind-mount into
|
|
||||||
# was already created in the run_setup function.
|
|
||||||
push @cleanup_tasks, sub {
|
|
||||||
rmdir "$options->{root}/dev/$fname"
|
|
||||||
or warning("cannot rmdir ./dev/$fname: $!");
|
|
||||||
};
|
|
||||||
if (-e "$options->{root}/dev/$fname") {
|
|
||||||
if (!-d "$options->{root}/dev/$fname") {
|
|
||||||
error "./dev/$fname already exists but is not"
|
|
||||||
. " a directory";
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
my $num_created
|
|
||||||
= make_path "$options->{root}/dev/$fname",
|
|
||||||
{ error => \my $err };
|
|
||||||
if ($err && @$err) {
|
|
||||||
error(
|
|
||||||
join "; ",
|
|
||||||
(
|
|
||||||
map {
|
|
||||||
"cannot create "
|
|
||||||
. (join ": ", %{$_})
|
|
||||||
} @$err
|
|
||||||
));
|
|
||||||
} elsif ($num_created == 0) {
|
|
||||||
error
|
|
||||||
"cannot create $options->{root}/dev/$fname";
|
|
||||||
}
|
|
||||||
}
|
|
||||||
chmod $mode, "$options->{root}/dev/$fname"
|
|
||||||
or error "cannot chmod ./dev/$fname: $!";
|
|
||||||
}
|
|
||||||
my @umountopts = ();
|
|
||||||
if ($options->{mode} eq 'unshare') {
|
|
||||||
push @umountopts, '--no-mtab';
|
|
||||||
}
|
|
||||||
push @cleanup_tasks, sub {
|
|
||||||
0 == system('umount', @umountopts,
|
|
||||||
"$options->{root}/dev/$fname")
|
|
||||||
or warning("umount ./dev/$fname failed: $?");
|
|
||||||
};
|
|
||||||
if ($fname eq "pts/") {
|
|
||||||
# We cannot just bind-mount /dev/pts from the host as
|
|
||||||
# doing so will make posix_openpt() fail. Instead, we
|
|
||||||
# need to mount a new devpts.
|
|
||||||
# We need ptmxmode=666 because /dev/ptmx is a symlink
|
|
||||||
# to /dev/pts/ptmx and without it posix_openpt() will
|
|
||||||
# fail if we are not the root user.
|
|
||||||
# See also:
|
|
||||||
# kernel.org/doc/Documentation/filesystems/devpts.txt
|
|
||||||
# salsa.debian.org/debian/schroot/-/merge_requests/2
|
|
||||||
# https://bugs.debian.org/856877
|
|
||||||
# https://bugs.debian.org/817236
|
|
||||||
0 == system(
|
|
||||||
'mount',
|
|
||||||
'-t',
|
|
||||||
'devpts',
|
|
||||||
'none',
|
|
||||||
"$options->{root}/dev/pts",
|
|
||||||
'-o',
|
|
||||||
'noexec,nosuid,uid=5,mode=620,ptmxmode=666'
|
|
||||||
) or error "mount /dev/pts failed";
|
|
||||||
} else {
|
} else {
|
||||||
0 == system('mount', '-o', 'bind', "/dev/$fname",
|
if (!-d "$options->{root}/dev") {
|
||||||
"$options->{root}/dev/$fname")
|
warning(
|
||||||
or error "mount ./dev/$fname failed: $?";
|
"skipping creation of ./dev/$fname because the"
|
||||||
|
. " /dev directory is missing in the target"
|
||||||
|
);
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
if (!-e "/dev/$fname" && $fname ne "pts/") {
|
||||||
|
warning("skipping creation of ./dev/$fname because"
|
||||||
|
. " /dev/$fname does not exist"
|
||||||
|
. " on the outside");
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
if (!-d "/dev/$fname" && $fname ne "pts/") {
|
||||||
|
warning("skipping creation of ./dev/$fname because"
|
||||||
|
. " /dev/$fname on the outside is not a"
|
||||||
|
. " directory");
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
if (!$options->{havemknod}) {
|
||||||
|
# If had mknod, then the directory to bind-mount into
|
||||||
|
# was already created in the run_setup function.
|
||||||
|
push @cleanup_tasks, sub {
|
||||||
|
rmdir "$options->{root}/dev/$fname"
|
||||||
|
or warning("cannot rmdir ./dev/$fname: $!");
|
||||||
|
};
|
||||||
|
if (-e "$options->{root}/dev/$fname") {
|
||||||
|
if (!-d "$options->{root}/dev/$fname") {
|
||||||
|
error
|
||||||
|
"./dev/$fname already exists but is not"
|
||||||
|
. " a directory";
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
my $num_created
|
||||||
|
= make_path "$options->{root}/dev/$fname",
|
||||||
|
{ error => \my $err };
|
||||||
|
if ($err && @$err) {
|
||||||
|
error(
|
||||||
|
join "; ",
|
||||||
|
(
|
||||||
|
map {
|
||||||
|
"cannot create "
|
||||||
|
. (join ": ", %{$_})
|
||||||
|
} @$err
|
||||||
|
));
|
||||||
|
} elsif ($num_created == 0) {
|
||||||
|
error( "cannot create $options->{root}"
|
||||||
|
. "/dev/$fname");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
chmod $mode, "$options->{root}/dev/$fname"
|
||||||
|
or error "cannot chmod ./dev/$fname: $!";
|
||||||
|
}
|
||||||
|
my @umountopts = ();
|
||||||
|
if ($options->{mode} eq 'unshare') {
|
||||||
|
push @umountopts, '--no-mtab';
|
||||||
|
}
|
||||||
|
push @cleanup_tasks, sub {
|
||||||
|
0 == system('umount', @umountopts,
|
||||||
|
"$options->{root}/dev/$fname")
|
||||||
|
or warning("umount ./dev/$fname failed: $?");
|
||||||
|
};
|
||||||
|
if ($fname eq "pts/") {
|
||||||
|
# We cannot just bind-mount /dev/pts from the host as
|
||||||
|
# doing so will make posix_openpt() fail. Instead, we
|
||||||
|
# need to mount a new devpts.
|
||||||
|
# We need ptmxmode=666 because /dev/ptmx is a symlink
|
||||||
|
# to /dev/pts/ptmx and without it posix_openpt() will
|
||||||
|
# fail if we are not the root user.
|
||||||
|
# See also:
|
||||||
|
# kernel.org/doc/Documentation/filesystems/devpts.txt
|
||||||
|
# salsa.debian.org/debian/schroot/-/merge_requests/2
|
||||||
|
# https://bugs.debian.org/856877
|
||||||
|
# https://bugs.debian.org/817236
|
||||||
|
0 == system(
|
||||||
|
'mount',
|
||||||
|
'-t',
|
||||||
|
'devpts',
|
||||||
|
'none',
|
||||||
|
"$options->{root}/dev/pts",
|
||||||
|
'-o',
|
||||||
|
'noexec,nosuid,uid=5,mode=620,ptmxmode=666'
|
||||||
|
) or error "mount /dev/pts failed";
|
||||||
|
} else {
|
||||||
|
0 == system('mount', '-o', 'bind', "/dev/$fname",
|
||||||
|
"$options->{root}/dev/$fname")
|
||||||
|
or error "mount ./dev/$fname failed: $?";
|
||||||
|
}
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
error "unsupported type: $type";
|
error "unsupported type: $type";
|
||||||
|
|
@ -1269,6 +1277,9 @@ sub run_chroot {
|
||||||
# set because if we mount it before, then base-files will not be able
|
# set because if we mount it before, then base-files will not be able
|
||||||
# to extract those
|
# to extract those
|
||||||
if ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
if ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
||||||
|
&& (any { $_ =~ '^chroot/mount(?:/sys)?$' } @{ $options->{skip} })) {
|
||||||
|
info "skipping chroot/mount/sys as requested";
|
||||||
|
} elsif ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
||||||
&& !$options->{canmount}) {
|
&& !$options->{canmount}) {
|
||||||
warning "skipping mount sysfs";
|
warning "skipping mount sysfs";
|
||||||
} elsif ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
} elsif ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
||||||
|
|
@ -1344,6 +1355,9 @@ sub run_chroot {
|
||||||
error "unknown mode: $options->{mode}";
|
error "unknown mode: $options->{mode}";
|
||||||
}
|
}
|
||||||
if ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
if ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
||||||
|
&& (any { $_ =~ '^chroot/mount(?:/proc)?$' } @{ $options->{skip} })) {
|
||||||
|
info "skipping chroot/mount/proc as requested";
|
||||||
|
} elsif ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
||||||
&& !$options->{canmount}) {
|
&& !$options->{canmount}) {
|
||||||
warning "skipping mount proc";
|
warning "skipping mount proc";
|
||||||
} elsif ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
} elsif ((any { $_ eq $options->{mode} } ('root', 'unshare'))
|
||||||
|
|
@ -6783,6 +6797,12 @@ out in B<extract> mode.
|
||||||
Run B<--customize-hook> options and all F<customize*> scripts in B<--hook-dir>.
|
Run B<--customize-hook> options and all F<customize*> scripts in B<--hook-dir>.
|
||||||
This step is not carried out in B<extract> mode.
|
This step is not carried out in B<extract> mode.
|
||||||
|
|
||||||
|
Whenever B<mmdebstrap> does a chroot call in B<root> or B<unshare> modes, it
|
||||||
|
will mount relevant device nodes, F</proc> and F</sys> into the chroot and
|
||||||
|
unmount them afterwards. This can be disabled using B<--skip=chroot/mount> or
|
||||||
|
specifically by B<--skip=chroot/mount/dev>, B<--skip=chroot/mount/proc> and
|
||||||
|
B<--skip=chroot/mount/sys>, respectively.
|
||||||
|
|
||||||
For each command that is run inside the chroot, B<mmdebstrap> will disable
|
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
|
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
|
F</sbin/start-stop-daemon> if they exist. This can be disabled with
|
||||||
|
|
|
||||||
12
tests/skip-mount
Normal file
12
tests/skip-mount
Normal file
|
|
@ -0,0 +1,12 @@
|
||||||
|
#!/bin/sh
|
||||||
|
set -eu
|
||||||
|
export LC_ALL=C.UTF-8
|
||||||
|
[ "{{ MODE }}" = "unshare" ]
|
||||||
|
trap "rm -f /tmp/debian-chroot.tar" EXIT INT TERM
|
||||||
|
{{ CMD }} --mode=unshare --variant=apt \
|
||||||
|
--skip=chroot/mount/proc,chroot/mount/sys \
|
||||||
|
--customize-hook='mountpoint "$1"/dev/null' \
|
||||||
|
--customize-hook='if mountpoint "$1"/sys; then exit 1; fi' \
|
||||||
|
--customize-hook='if mountpoint "$1"/proc; then exit 1; fi' \
|
||||||
|
{{ DIST }} /tmp/debian-chroot.tar {{ MIRROR }}
|
||||||
|
tar -tf /tmp/debian-chroot.tar | sort | diff -u tar1.txt -
|
||||||
Loading…
Reference in a new issue