setuidgid — runs another program under a specified account's uid and gid.
account is a single argument.
child consists of one or more arguments.
setuidgid sets its uid and gid to
account's uid and gid, removing all supplementary groups.
It then runs
setuidgid cannot be run by anyone other than root.
setuidgid exits 111 if it cannot find a UNIX account named
account, if it cannot setgid, if it cannot setuid, or if it cannot run
Otherwise its exit code is the same as that of