Bug#1100848: Possible solution to create the group 'scanner'

[Roland Clobus]

Hi,




https://git.jff.email/cgit/sane-backends.git/tree/debian/libsane1.preinst#n21

A random example from the postinst from util-linux:
https://sources.debian.org/src/util-linux/2.40.4-5/debian/uuid-runtime.postinst/?hl=6#L4-L7

```
# add uuidd user/group if needed.
if ! getent group uuidd >/dev/null; then
        addgroup --system uuidd
fi
```

Could this be used in the postinst of libsane1?

With kind regards,
Roland Clobus

the order is correct, but does libsane1 create the group 'scanner' only on upgrade and not on a fresh install?

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