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)