SETPGRP(2J)             GENIX Programmer's Manual             SETPGRP(2J)



      NAME
           setpgrp, getpgrp - set/get process group

      SYNOPSIS
           int getpgrp(pid)

           setpgrp(pid, pgrp)

           cc ... -ljobs

      DESCRIPTION
           The process group of the specified process is returned  by  getpgrp.
           Setpgrp  sets  the process group of the specified process pid to the
           specified pgrp. If pid is zero, then the call applies to the current
           process.

           If the invoker is not the super-user, then the affected process must
           have the same effective user-id as the invoker or be a descendant of
           the invoking process.

           This call is used by csh(1) to create process groups in implementing
           job  control.  The TIOCGPGRP and TIOCSPGRP calls described in tty(4)
           are used to get/set the process group of the control terminal.

           See jobs(3) for a general discussion of job control.

      SEE ALSO
           jobs(3), getuid(2), tty(4)

      BUGS
           The job control facilities are not available in standard  version  7
           UNIX.   These  facilities are still under development and may change
           in future releases of the system as better inter-process  communica-
           tion  facilities and support for virtual terminals become available.
           The options and specifications of these system calls  and  even  the
           calls themselves are thus subject to change.

           A system call setpgrp has been implemented in other versions of UNIX
           which are not widely used outside of Bell Laboratories; these imple-
           mentations have, in general, slightly different semantics.















      Printed 11/16/83                                                        1