If your daemon does not need any additional privileges which come as
a result of running as root, than you can actually "downgrade" your
daemon to ANY user using setuid() function (man setuid for more
info). This probably will be good idea, because you should not have
pieces running as root if you do not want/need extra privileges.
Alternatively, if you are can use DO which employes "normal" (TCP/IP)
sockets (I believe I read somewhere that it is possible), than most
likely you will not have any difficulties connecting from user
process to root server - because TCP/IP sockets do not have concept
of "user".
On Apr 29, 2006, at 1:59 PM, James Bucanek wrote:
I haven't found this documented anywhere. I remember it being
discussed on the list, but never any definitive answer.
Can an application connect to a daemon using distributed objects
via a named port if the application is running as the user and the
daemon is running as root? I remember someone commenting that a
user-level process can't connect with a root process using DO for
"security reasons."
I'm writing an application that needs to communicate with a
centralized scheduling/communications server. This must be run as a
daemon since it needs to run all of the time, which means that it
has to run as root since StartupItems and launchd have no concept
of a "user level" daemon. If I can't communicate with the daemon
using DO, I've got major design headaches ahead...
--
James Bucanek
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