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  follow-
     ing:

     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)