Public bug reported:
Binary package hint: vsftpd
During an upgrade from Ubuntu 8.04 to Ubuntu 10.04 the vsftpd failed to upgrade
cleanly:
--------
Installing new version of config file /etc/pam.d/vsftpd ...
vsftpd user (ftp) already exists, doing nothing.
chown: invalid group: `root:ftp'
dpkg: error processing vsftpd (--configure):
subprocess installed post-installation script returned error exit status 1
--------
The ftp group does not exist on Ubuntu 8.04 and is not created during or
after the upgrade to Ubuntu 10.04. The primary group of the ftp user is
exactly the nobody group.
I think the problem is cause by the /var/lib/dpkg/info/vsftpd.postinst script
assuming that the ftp user has an ftp group:
--------
db_get vsftpd/username
_USERNAME="${RET:-ftp}"
--------
And later in the same script:
--------
mkdir -p "${_DIRECTORY}"
chown root:${_USERNAME} ${_DIRECTORY} -R
--------
I think the most obvious fix is to create a new _GROUP variable which
would default to an existing group and use this in the chown command.
I'm not sure if the nobody group is the best group for this.
** Affects: vsftpd (Ubuntu)
Importance: Undecided
Status: New
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vsftpd 2.2.2-3ubuntu4 fails to upgrade because no ftp group
https://bugs.launchpad.net/bugs/530832
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