2.9BSD/usr/man/man2/killbkg.2

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.TH KILLPG 2
.UC
.SH NAME
killpg, killbkg \- send signal to process group
.SH SYNOPSIS
.B killpg(pgrp, sig);
.sp
.B killbkg(pgrp, sig);
.SH DESCRIPTION
.I Killpg
sends the specified signal to all processes
in the process group headed by process
.IR pgrp .
.I Killbkg
does the same, but only for processes
that have not been marked by
.IR submit (2).
.PP
Use of these calls is restricted to the super-user.
.SH RETURN VALUE
Upon successful completion, a value of 0 is returned.  Otherwise, a
value of \-1 is returned and
.I errno
is set to indicate the error.
.SH ERRORS
.I Killbkg
will fail and no signal will be sent if any of the following occur:
.TP 20
[EINVAL]
.I Sig
is not a valid signal number.
.TP 20
[ESRCH]
No process can be found corresponding to the process group specified by
.IR pgrp .
.TP 20
[EPERM]
The caller is not the super-user.
.SH SEE ALSO
kill(2), signal(2), submit(2)
.SH ASSEMBLER
.nf
(local = 58., killpg = 6.)
.B sys local; 9f
\&. . .
.B \&.data
.B 9: sys killpg; pgrp; sig
.sp
(local = 58., killbkg = 5.)
.B sys local; 9f
\&. . .
.B \&.data
.B 9: sys killbkg; pgrp; sig
.fi