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NAME

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

SYNOPSIS

       #include <signal.h>

       int killpg(pid_t pidgrp, int signal);

DESCRIPTION

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

       It is equivalent to

       kill(-pidgrp,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,

       ESRCH  for a process group which does not exist, and

       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.

CONFORMING TO

       ???

SEE ALSO

       kill(2), signal(2), signal(7)