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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "TCSENDBREAK" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" tcsendbreak 
+.SH NAME
+tcsendbreak \- send a break for a specific duration
+.SH SYNOPSIS
+.LP
+\fB#include <termios.h>
+.br
+.sp
+int tcsendbreak(int\fP \fIfildes\fP\fB, int\fP \fIduration\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+If the terminal is using asynchronous serial data transmission, \fItcsendbreak\fP()
+shall cause transmission of a continuous
+stream of zero-valued bits for a specific duration. If \fIduration\fP
+is 0, it shall cause transmission of zero-valued bits for at
+least 0.25 seconds, and not more than 0.5 seconds. If \fIduration\fP
+is not 0, it shall send zero-valued bits for an
+implementation-defined period of time.
+.LP
+The \fIfildes\fP argument is an open file descriptor associated with
+a terminal.
+.LP
+If the terminal is not using asynchronous serial data transmission,
+it is implementation-defined whether \fItcsendbreak\fP()
+sends data to generate a break condition or returns without taking
+any action.
+.LP
+Attempts to use \fItcsendbreak\fP() from a process which is a member
+of a background process group on a \fIfildes\fP
+associated with its controlling terminal shall cause the process group
+to be sent a SIGTTOU signal. If the calling process is
+blocking or ignoring SIGTTOU signals, the process shall be allowed
+to perform the operation, and no signal is sent.
+.SH RETURN VALUE
+.LP
+Upon successful completion, 0 shall be returned. Otherwise, -1 shall
+be returned and \fIerrno\fP set to indicate the error.
+.SH ERRORS
+.LP
+The \fItcsendbreak\fP() function shall fail if:
+.TP 7
+.B EBADF
+The \fIfildes\fP argument is not a valid file descriptor.
+.TP 7
+.B ENOTTY
+The file associated with \fIfildes\fP is not a terminal.
+.sp
+.LP
+The \fItcsendbreak\fP() function may fail if:
+.TP 7
+.B EIO
+The process group of the writing process is orphaned, and the writing
+process is not ignoring or blocking SIGTTOU.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+The Base Definitions volume of IEEE\ Std\ 1003.1-2001, Chapter 11,
+General
+Terminal Interface, \fI<termios.h>\fP, \fI<unistd.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .