88 lines
2.8 KiB
Groff
88 lines
2.8 KiB
Groff
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.\" $NetBSD: _lwp_kill.2,v 1.4 2009/06/24 22:19:14 zafer Exp $
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.\"
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.\" Copyright (c) 2003, 2007 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Jason R. Thorpe of Wasabi Systems, Inc, and by Andrew Doran.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 20, 2007
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.Dt _LWP_KILL 2
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.Os
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.Sh NAME
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.Nm _lwp_kill
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.Nd send a signal to a light-weight process
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In lwp.h
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.Ft int
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.Fn _lwp_kill "lwpid_t lwp" "int sig"
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.Sh DESCRIPTION
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.Fn _lwp_kill
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sends the signal specified by
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.Fa sig
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to the light-weight process specified by
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.Fa lwp .
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If the
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.Fa sig
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argument is given as 0 (zero),
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.Nm
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will test for the existence of the target LWP, but will take no further
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action.
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.Pp
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Job control signals and uncatchable signals can not be directed to a specific
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LWP: if posted with
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.Nm ,
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they will affect all LWPs in the process.
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.Pp
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Signals will be posted successfully to suspended LWPs, but will not be
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handled further until the LWP has been continued.
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.Sh RETURN VALUES
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A 0 value indicates that the call succeeded.
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A \-1 return value indicates an error occurred and
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.Va errno
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is set to indicate the reason.
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.Sh ERRORS
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.Bl -tag -width [EINVAL]
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.It Bq Er EINVAL
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.Fa sig
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is not a valid signal number.
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.It Bq Er ESRCH
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No LWP can be found in the current process corresponding to that
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specified by
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.Fa lwp .
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.El
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.Sh SEE ALSO
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.Xr _lwp_continue 2 ,
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.Xr _lwp_suspend 2 ,
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.Xr kill 2 ,
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.Xr sigaction 2 ,
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.Xr signal 7
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.Sh HISTORY
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The
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.Fn _lwp_kill
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system call first appeared in
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.Nx 5.0 .
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