- use /etc/ld.so.conf from the chroot instead of the host
- parse /etc/ld.so.conf instead of blindly accessing /etc/ld.so.conf.d
- add libraries from the chroot instead of the host
- instead of throwing an error, just print a warning
- can now run as root without cap_sys_admin
- can now run without mount installed
- --skip=check/canmount is not needed anymore
- gpg will not create a trustdb when running with --update-trustdb with
--trust-model=always:
gpg: no need for a trustdb update with 'always' trust model
- subsequent gpg calls will fail because there is no trustdb in GPGHOME
- use $REAL_USER_ID from English instead of $<
- use getgrgid $REAL_GROUP_ID to get the group name instead of assuming
the group name to be equal to the user name
- also check whether /etc/subgid exists and is readable
This is fixing the error:
cannot rmdir /var/lib/apt/lists/auxfiles: Directory not empty at ./mmdebstrap/mmdebstrap line 3084.
which happens when using apt-transport-mirror.
/bin/ping (from iputils-ping) uses the security capabilities to allow
users to use the program:
```
$ getcap /bin/ping
/bin/ping cap_net_raw=ep
```
Debian testing/unstable images (variant important) contain security and
system attributes:
```
$ mmdebstrap --variant=important bullseye root.tar
$ tar --xattrs --xattrs-include='*' -vv -tf root.tar | grep -B 1 '^ '
-rwxr-xr-x* 0/0 77432 2021-02-02 18:49 ./bin/ping
x: 20 security.capability
--
drwxr-sr-x* 0/102 0 2021-05-07 15:10 ./var/log/journal/
x: 44 system.posix_acl_access
x: 44 system.posix_acl_default
```
When generating a squashfs image with mmdebstrap 0.7.5-2, these security
capabilities are lost. Example for building a squashfs image in a
minimal Debian unstable schroot:
```
$ apt install -y mmdebstrap squashfs-tools-ng
$ mmdebstrap --variant=important buster root.squashfs
$ rdsquashfs -x /bin/ping root.squashfs
$
```
tar2sqfs from squashfs-tools-ng 1.0.4-1 supports encoding extended
attributes from the namespace `user`, `trusted`, and `security` (see
`include/sqfs/xattr.h`). GNU tar (version 1.34) supports these three
namespaces plus the namespace `system`.
Passing extended attributes from the `system` namespace to tar2sqfs will
produce an error:
```
ERROR: squashfs does not support xattr prefix of system.posix_acl_default
```
So pass the extended attributes to tar2sqfs, but exclude the `system`
namespace. Then ping will keep its security attributes:
```
$ rdsquashfs -x /bin/ping root.squashfs
security.capability=0x0100000200200000000000000000000000000000
```
Closes: #988100
Signed-off-by: Benjamin Drung <benjamin.drung@ionos.com>
gpg command "--list-keys" requires input files to be passed with
option "--keyring" and each file must match type "public keyring v4"
while gpg command "--show-keys" doesn't require extra options and
handles also ASCII-armored public keyrings as well.
Signed-off-by: Konstantin Demin <rockdrilla@gmail.com>
- assume all entries in @devfiles to be in /dev
- allow for /dev, /sys and /proc not to exist in the target and print warning
- allow for /dev entries as well as /sys and /proc not to exist on the outside
- simplify umount by storing special options in @umountopts
- remove superfluous checks for root and unshare mode
- make sure /dev entries are less than 100 chars in size for tar
- even if the user is root, they might not have permission to mount
- check for CAP_SYS_ADMIN and unshare --mount before proceeding
- allow one to disable the check with --skip=check/canmount
- this is useful in container environments like docker
- this is useful when you are already root and want the benefits of
unsharing the mount namespace to prevent messing up your system
- if the unshare mode is used as root, the user namespace is not unshared
anymore and newuidmap, setuid and friends are not called anymore
- if the unshare mode is used as non-root test if the user namespace can be
unshared, otherwise test if the mount namespace can be unshared
- systemd didn't get fixed but somehow the order matches again (bug #963788)
- python is installable again (bug #968217)
- apt immediate configure was not fixed but src:glibc changed to not
trigger the bug anymore (bugs #973305, #973325 and #972552)
This change also fixes the problem that when --quiet is given, an error
will never lead to a non-zero exit status because the error function
returns before it runs die()
Depending on the mode an on whether mknod works (mount options of
$TMPDIR) different stuff might be in /dev. To make the blocksize in of
the ext2 output format reproducible, ignore the content of /dev.
Whenever the selected architecture differs from the native architecture
of the system that runs mmdebstrap, mmdebstrap checks whether it can run
the selected architecture. In the majority of cases, this is good and
helps avoid difficult to diagnose issues. However when running in
chrootless mode, we don't actually want to run any binaries from the
target system. For that reason, the emulation check should be skipped in
chrootless mode.
