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30.\" $FreeBSD: src/lib/libc_r/man/pthread_kill.3,v 1.8 2001/10/01 16:09:09 ru Exp $
31.Dd Feb 05, 2002
32.Dt PTHREAD_KILL 2
33.Os
34.Sh NAME
35.Nm pthread_kill
36.Nd send a signal to a specified thread
37.Sh SYNOPSIS
38.In signal.h
39.Ft int
40.Fn pthread_kill "pthread_t thread" "int sig"
41.Sh DESCRIPTION
42The
43.Fn pthread_kill
44function sends a signal, specified by
45.Fa sig ,
46to a thread, specified by
47.Fa thread .
48If
49.Fa sig
50is 0, error checking is performed, but no signal is actually sent.
51.Sh RETURN VALUES
52If successful,
53.Fn pthread_kill
54returns 0.
55Otherwise, an error number is returned.
56.Sh ERRORS
57.Fn pthread_kill
58will fail if:
59.Bl -tag -width Er
60.It Bq Er EINVAL
61.Fa sig
62is an invalid or unsupported signal number.
63.It Bq Er ESRCH
64.Fa thread
65is an invalid thread ID.
66.El
67.Sh LEGACY SYNOPSIS
68.Fd #include <pthread.h>
69.Fd #include <signal.h>
70.Pp
71The include file
72.In pthread.h
73is necessary.
74.Sh SEE ALSO
75.Xr kill 2 ,
76.Xr pthread_self 3 ,
77.Xr raise 3 ,
78.Xr compat 5
79.Sh STANDARDS
80.Fn pthread_kill
81conforms to ISO/IEC 9945-1:1996 (``POSIX.1'')