On Mon, 14 Oct 2013, Gregory P. Ennis wrote:
I have never used setuid, but it appears that this will only allow a piece of software to be set to root. I really do not want to give that kind of privilege to this piece of software.
IIRC suid sets the effective user to the owner of the file. If ceres runs a setuid program owned by series, the effective user will become series. There is also a system call to make effective owner the actual owner. suid root programs often use it after they have glommed onto all the necessary resources only availale to root.