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NAME
       killpg - send signal to all members of a process group


SYNOPSIS
       #include <signal.h>

       int killpg(pid_t pgrp, int signal);


DESCRIPTION
       The  killpg()  function  causes  signal  signal  to  be sent to all the
       processes in the process group pgrp or to the  processes’  own  process
       group if pgrp is equal to zero.

       If pgrp is greater than 1, it is equivalent to

       kill(-pgrp,signal);


RETURN VALUE
       The value returned is -1 on error, or 0 for success.


ERRORS
       Errors are returned in errno and can be one of the following:

       EINVAL for an invalid signal,

       EPERM  if the userid of the calling process is not equal to that of the
              process the signal is sent to, and the userid is not that of the
              superuser.

       ESRCH  for a process group which does not exist, and


CONFORMING TO
       SUSv2, POSIX.1-2001


SEE ALSO
       kill(2), signal(2), sigqueue(2), signal(7)