CFSETISPEED
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
NAME
cfsetispeed
--- set input baud rate
SYNOPSIS
#include <termios.h>
int cfsetispeed(struct termios *termios_p, speed_t speed);
DESCRIPTION
The
cfsetispeed()
function shall set the input baud rate stored in the structure pointed
to by
termios_p
to
speed.
There shall be no effect on the baud rates set in the hardware until a
subsequent successful call to
tcsetattr()
with the same
termios
structure. Similarly, errors resulting from attempts to set baud rates
not supported by the terminal device need not be detected until the
tcsetattr()
function is called.
RETURN VALUE
Upon successful completion,
cfsetispeed()
shall return 0; otherwise, -1 shall be returned, and
errno
may be set to indicate the error.
ERRORS
The
cfsetispeed()
function may fail if:
- EINVAL
-
The
speed
value is not a valid baud rate.
- EINVAL
-
The value of
speed
is outside the range of possible speed values as specified in
<termios.h>.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
Refer to
cfgetispeed().
FUTURE DIRECTIONS
None.
SEE ALSO
cfgetispeed(),
cfgetospeed(),
cfsetospeed(),
tcsetattr()
The Base Definitions volume of POSIX.1-2017,
Chapter 11, General Terminal Interface,
<termios.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 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 .
Any typographical or formatting errors that appear
in this page are most likely
to have been introduced during the conversion of the source files to
man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .