.\" $NetBSD: pthread_kill.3,v 1.9 2010/07/09 08:51:28 jruoho Exp $
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.\" $FreeBSD: src/lib/libpthread/man/pthread_kill.3,v 1.9 2002/09/16 19:29:28 mini Exp $
.Dd July 9, 2010
.Dt PTHREAD_KILL 3
.Os
.Sh NAME
.Nm pthread_kill
.Nd send a signal to a specified thread
.Sh LIBRARY
.Lb libpthread
.Sh SYNOPSIS
.In pthread.h
.In signal.h
.Ft int
.Fn pthread_kill "pthread_t thread" "int sig"
.Sh DESCRIPTION
The
.Fn pthread_kill
function sends a signal, specified by
.Fa sig ,
to a thread, specified by
.Fa thread .
The signal will be handled in the context of
.Fa thread ,
but the signal action may alter the process as a whole.
If
.Fa sig
is 0, error checking is performed, but no signal is actually sent.
.Sh RETURN VALUES
If successful,
.Fn pthread_kill
returns 0.
Otherwise, an error number is returned.
.Sh ERRORS
.Fn pthread_kill
shall fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
.Fa sig
is an invalid or unsupported signal number.
.It Bq Er ESRCH
.Fa thread
is an invalid thread ID.
.El
.Sh SEE ALSO
.Xr kill 2 ,
.Xr sigwait 2 ,
.Xr pthread_self 3 ,
.Xr raise 3
.Sh STANDARDS
The function conforms to
.St -p1003.1-2001 .