Russ Allbery wrote: > Thomas Goirand <[EMAIL PROTECTED]> writes: > >> Daniel suggested that there was the possibility of setting-up a specific >> user "dtc" that I could setup on my postinst script. But this leads to >> MANY problems that I will explain here. First, there is no way to >> guarantee that the UID will be always the same, and that's the main >> problem. > >> 1/ Portability between servers >> If you have many servers using the control panel like we do (we run more >> than 100 servers using it ATM in production), and need to move files >> from one server to another, then the UID wont be the same. It would be >> really anoying to do chown all the time. > > Programs that copy files between servers should use the symbolic ownership > rather than the UID/GID values. I believe that rsync, for instance, > already does this. The issue here would only be if the servers were > sharing a file system, in which case the administrator is going to need to > create the user on a site-wide basis using a shared user store, such as > LDAP. If they do that before installing the package, adduser won't create > the user (as I understand it, at least).
I always use something like this in my postinst scripts
if ! getent group foo > /dev/null ; then
addgroup --quiet --system foo
fi
This avoids the warning/error message, if the group/user already exists.
Cheers,
Michael
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