Missing /bin/sh (dash) in supermin appliance

[Ciro Santilli 六四事件 法轮功]

Bionic beaver 18.04 libguetfs-tools 1:1.36.13-1ubuntu3:

    sudo apt-get install libguestfs-tools
    mkdir sysroot
    # Just a test file.
    dd if=/dev/urandom of=sysroot/myfile bs=1024 count=1024
    sudo virt-make-fs --format=qcow2 --type=ext2 sysroot sysroot.ext2.qcow2

fails with:

    libguestfs: error: tar_in: write error on directory: /:

Without sudo:

    virt-make-fs --format=qcow2 --type=ext2 sysroot sysroot.ext2.qcow2

fails with:

    libguestfs: error: /usr/bin/supermin exited with error status 1.
    To see full error messages you may need to enable debugging.
    Do:
    export LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1
    and run the command again. For further information, read:
    http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs
    You can also run 'libguestfs-test-tool' and post the *complete* output
    into a bug report or message to the libguestfs mailing list.

but I think it is an unrelated problem.

Original command with debug vars:

    sudo LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1 virt-make-fs --format=qcow2 --size=+200M sysroot/ output.img

attached as a file.

[Ciro Santilli 六四事件 法轮功 (cirosantilli)]

Upstream report: https://bugzilla.redhat.com/show_bug.cgi?id=1591617

[Matteo Panella (mpanella)]

As stated in the upstream report, the bug is really caused by /bin/sh missing in the supermin appliance. This was fixed upstream in https://github.com/libguestfs/libguestfs/commit/0cca7f9061455d29a7f893e715028cd3e75c19fd and downstream in Debian in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889861

The patch applies with minimal fuzz to the version shipped in 18.04, without the aforementioned fix any libguestfs command which require interaction with a binary inside the supermin appliance fails (find, tar-*, even debug commands).

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.