setpgrp — become a process group leader then chain
setpgrp
{next-prog
}
setpgrp is a chain-loading utility that attempts to become a
proces group leader and then chain loads to next-prog
with the
execvp(3)
function.
next-prog
may contain its own command line options, which setpgrp will ignore.
If the process already is a process group leader, no call to the setpgid(2) library function is made.