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bug#26797: qemu looks for smbd at /usr/sbin

From: Ludovic Courtès
Subject: bug#26797: qemu looks for smbd at /usr/sbin
Date: Sun, 07 May 2017 17:33:24 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)

Marius Bakke <address@hidden> skribis:

> Ludovic Courtès <address@hidden> writes:
>> Ricardo Wurmus <address@hidden> skribis:
>>> Qemu comes with support for sharing files with a guest via Samba.  This
>>> is done by appending something like this to the qemu-system-*
>>> invocation:
>>>     … -net user,smb=$HOME/Downloads -net nic
>>> Qemu needs to be told *at configure time* where the smbd executable will
>>> be at runtime.  By default this is /usr/sbin/smbd.  Users can work
>>> around this problem by installing the “samba” package and creating a
>>> link from /usr/sbin/smbd to the actual executable.
>>> It would be better to fix this, but this would require adding samba as a
>>> dependency to Qemu, so that the location can be set at configure time.
>>> Alternatively, we could patch Qemu to look for smbd depending on an
>>> environment variable.
>> See commit b344c505f4dff2ecbe981f0a0a3c3d67b222dcca, which removed the
>> dependency and Samba.  Prior to that commit, QEMU recorded the absolute
>> file name of ‘smbd’.
>> The problem is that Samba is big:
>> --8<---------------cut here---------------start------------->8---
>> $ guix size qemu |tail -1
>> total: 710.5 MiB
>> $ guix size qemu samba |tail -1
>> total: 1203.5 MiB
>> --8<---------------cut here---------------end--------------->8---
>> Thus it’d be best if we modified QEMU to search for ‘smbd’ in $PATH.
> Tangentially, would it make sense to add a "qemu-full" package? I'd like
> to add RBD support when Ceph is stable on Hydra, but that adds another
> ~300MiB to the closure (and a very expensive dependency..).

The day after someone will suggest adding “qemu-fuller”.  ;-)

Seriously yes, why not; just wondering whether it should be called
“qemu-ceph-enabled” or something along these lines.


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