setpgrp(2)                 DG/UX 4.30                  setpgrp(2)



     NAME
          setpgrp - Set process-group-id.

     SYNOPSIS
          int     setpgrp ()

     PARAMETERS
          None.

     DESCRIPTION
          The setpgrp system call sets the process-group-id of the
          calling process.  to the process-id of the calling process

     ACCESS CONTROL
          No access checking is performed.

     RETURN VALUE
          process-group-id
                         The new value of the calling process's
                         process-group-id.

     EXCEPTIONS
          None.

     SEE ALSO
          getpgrp(2), getpgrp2(2), setpgrp2(2).

     STANDARDS
          When using m88kbcs as the Software Development Environment
          target, the setpgrp function will be emulated using BCS
          system calls. Since this is an emulation requiring several
          BCS system calls, a slight performance degradation may be
          noticed in comparison to using berksignal in /lib/libc.a.

          The only way for a session to allocate a controlling
          terminal is for the session leader (which must not already
          have a controlling terminal) to open a terminal device that
          is not already associated with any session, without using
          the O_NOCTTY option to open.  The effect is that the
          processes in a session may have at most one controlling
          terminal, and a terminal may have at most one controlling
          process, which must be a session leader.  When the
          controlling process terminates, an automatic vhangup occurs
          on the terminal and its terminal characteristics are reset.











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