NetBSD/lib/libutil/ttymsg.3

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.\" $NetBSD: ttymsg.3,v 1.8 2002/02/20 11:34:42 wiz Exp $
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.\"
.\" Copyright (c) 1996 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.Dd June 29, 1997
.Dt TTYMSG 3
.Os
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.Sh NAME
.Nm ttymsg
.Nd ttymsg utility function
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.Sh LIBRARY
.Lb libutil
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.Sh SYNOPSIS
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.Fd #include \*[Lt]util.h\*[Gt]
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.Ft char *
.Fn ttymsg "struct iovec *iov" "int iovlen" "const char *tty" "int tmout"
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.Sh DESCRIPTION
The
.Fn ttymsg
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function is used by
programs such as
.Xr talkd 8 ,
.Xr syslogd 8 ,
.Xr wall 1 ,
etc., to display the contents of a uio structure on a terminal.
.Fn ttymsg
forks and finishes in the child if the write would block after
waiting up to
.Fa tmout
seconds.
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.Sh RETURN VALUES
.Fn ttymsg
returns a pointer to an error string on unexpected
error; the string is not newline-terminated. Various "normal" errors are
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ignored (exclusive-use, lack of permission, etc.).
.Sh SEE ALSO
.Xr writev 2