KILLPG(2)                            BSD                             KILLPG(2)



NAME
     killpg - send signal to a process group

SYNOPSIS
     killpg(pgrp, sig)
     int pgrp, sig;

DESCRIPTION
     killpg sends the signal sig to the process group pgrp.  See sigvec(2) for
     a list of signals.

     The sending process and members of the process group must have the same
     effective user ID, or the sender must be the super-user.  As a single
     special case, the continue signal SIGCONT can be sent to any process that
     is a descendant of the current process.

ERRORS
     killpg will fail and no signal will be sent if any of the following
     occur:

     [EINVAL]       sig is not a valid signal number.

     [ESRCH]        No process can be found in the process group specified by
                    pgrp.

     [ESRCH]        The process group was given as 0 but the sending process
                    does not have a process group.

     [EPERM]        The sending process is not the super-user and one or more
                    of the target processes has an effective user ID different
                    from that of the sending process.

SEE ALSO
     kill(2), getpgrp(2), sigvec(2)

DIAGNOSTICS
     Upon successful completion, a value of 0 is returned.  Otherwise, a value
     of -1 is returned and the global variable errno is set to indicate the
     error.