There is a typing error at: https://metacpan.org/pod/Proc::Daemon
setgid Sets the real group identifier ($() and the effective group identifier ($)) for the daemon process using POSXI::setgid( ... ), just like setuid. As with setuid, the first user must have the rights to switch to the new group, otherwise the group id will not be changed.
"POSIX::setuid" seems to have been mistyped into "POSXI::setgid".
There is a typing error at: https://metacpan.org/pod/Proc::Daemon
setgid Sets the real group identifier ($() and the effective group identifier ($)) for the daemon process using POSXI::setgid( ... ), just like setuid. As with setuid, the first user must have the rights to switch to the new group, otherwise the group id will not be changed."POSIX::setuid" seems to have been mistyped into "POSXI::setgid".