killpg(3N)                                             killpg(3N)



     NAME
          killpg - send signal to a process group

     SYNOPSIS
          int killpg(pgrp, sig)
          int pgrp, sig;

     DESCRIPTION
          killpg sends the signal sig to the process group pgrp.

          The sending process and members of the process group must
          have the same effective user ID, otherwise this call is res-
          tricted to the superuser.  As a single special case the con-
          tinue signal SIGCONT may be sent to any process which is a
          descendant of the current process.

     RETURN VALUE
          Upon successful completion, a value of 0 is returned.  Oth-
          erwise, a value of -1 is returned and the global variable
          errno is set to indicate the error.

     ERRORS
          killpg will fail and no signal will be sent if any of the
          following occur:

          [EINVAL]     sig is not a valid signal number.

          [ESRCH]      No process can be found corresponding to that
                       specified by pgrp.

          [EPERM]      The sending process is not the superuser and
                       one or more of the target processes has an ef-
                       fective user ID different from that of the
                       sending process.

     SEE ALSO
          kill(2), getpid(2).


















     April, 1990                                                     1