1.\" $NetBSD: _lwp_kill.2,v 1.4 2009/06/24 22:19:14 zafer Exp $ 2.\" 3.\" Copyright (c) 2003, 2007 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Jason R. Thorpe of Wasabi Systems, Inc, and by Andrew Doran. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd January 20, 2007 31.Dt _LWP_KILL 2 32.Os 33.Sh NAME 34.Nm _lwp_kill 35.Nd send a signal to a light-weight process 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In lwp.h 40.Ft int 41.Fn _lwp_kill "lwpid_t lwp" "int sig" 42.Sh DESCRIPTION 43.Fn _lwp_kill 44sends the signal specified by 45.Fa sig 46to the light-weight process specified by 47.Fa lwp . 48If the 49.Fa sig 50argument is given as 0 (zero), 51.Nm 52will test for the existence of the target LWP, but will take no further 53action. 54.Pp 55Job control signals and uncatchable signals can not be directed to a specific 56LWP: if posted with 57.Nm , 58they will affect all LWPs in the process. 59.Pp 60Signals will be posted successfully to suspended LWPs, but will not be 61handled further until the LWP has been continued. 62.Sh RETURN VALUES 63A 0 value indicates that the call succeeded. 64A \-1 return value indicates an error occurred and 65.Va errno 66is set to indicate the reason. 67.Sh ERRORS 68.Bl -tag -width [EINVAL] 69.It Bq Er EINVAL 70.Fa sig 71is not a valid signal number. 72.It Bq Er ESRCH 73No LWP can be found in the current process corresponding to that 74specified by 75.Fa lwp . 76.El 77.Sh SEE ALSO 78.Xr _lwp_continue 2 , 79.Xr _lwp_suspend 2 , 80.Xr kill 2 , 81.Xr sigaction 2 , 82.Xr signal 7 83.Sh HISTORY 84The 85.Fn _lwp_kill 86system call first appeared in 87.Nx 5.0 . 88