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@(#)killpg.2 8.1 (Berkeley) 6/2/93
$FreeBSD: head/lib/libc/compat-43/killpg.2 108087 2002-12-19 09:40:28Z ru $
.Dd June 2, 1993 .Dt KILLPG 2 .Os .Sh NAME .Nm killpg .Nd send signal to a process group .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/types.h n signal.h .Ft int .Fn killpg "pid_t pgrp" "int sig" .Sh DESCRIPTION The .Fn killpg function sends the signal .Fa sig to the process group .Fa pgrp . See .Xr sigaction 2 for a list of signals. If .Fa pgrp is 0, .Fn killpg sends the signal to the sending process's process group.
p 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 may be sent to any process that is a descendant of the current process. .Sh RETURN VALUES .Rv -std killpg .Sh ERRORS The .Fn killpg function will fail and no signal will be sent if: l -tag -width Er t Bq Er EINVAL The .Fa sig argument is not a valid signal number. t Bq Er ESRCH No process can be found in the process group specified by .Fa pgrp . t Bq Er ESRCH The process group was given as 0 but the sending process does not have a process group. t Bq Er 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. .El .Sh SEE ALSO .Xr getpgrp 2 , .Xr kill 2 , .Xr sigaction 2 .Sh HISTORY The .Fn killpg function appeared in x 4.0 .