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
       child.

       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 child.  Otherwise its exit code is the same as that of child.

       setuidgid - runs another program under a specified account's uid and gid.

supervise(8),   svc(8),   svok(8),  svstat(8),  svscanboot(8),  svscan(8),  readproctitle(8),  fghack(8),
       pgrphack(8), multilog(8), tai64n(8), tai64nlocal(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)

       http://cr.yp.to/daemontools.htmlsetuidgid(8)

setuidgidaccountchild