killpg man page on Ultrix

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killpg(2)							     killpg(2)

       killpg - send signal to process or process group

       killpg(pgrp, sig)
       int pgrp, sig;

       The  system  call  sends the signal sig to the process group pgrp.  See
       for a list of signals.

       The sending process and members of the process group must have the same
       effective  user	ID, otherwise this call is restricted to the superuser
       with the exception of the signal SIGCONT.  The signal  SIGCONT  can  be
       sent to any process which is a descendant of the current process.

Return Values
       Upon  successful	 completion,  a	 value of 0 is returned.  Otherwise, a
       value of -1 is returned, and the global variable errno is set to	 indi‐
       cate the error.

       The system call fails and a signal is not sent under the following con‐

       [EINVAL]	      The sig is not a valid signal number.

       [EPERM]	      The sending process is not the superuser and all of  the
		      target  processes have an effective user ID that differs
		      from that of the sending process.

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

See Also
       getpgrp(2), kill(2), sigvec(2)


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