CFSETISPEED(3P) POSIX Programmer's Manual CFSETISPEED(3P)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.
NAMEcfsetispeed - set input baud rate
int cfsetispeed(struct termios *termios_p, speed_t speed);
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 struc‐
ture. Similarly, errors resulting from attempts to set baud rates not
supported by the terminal device need not be detected until the tcse‐
tattr() function is called.
Upon successful completion, cfsetispeed() shall return 0; otherwise, -1
shall be returned, and errno may be set to indicate the error.
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.
Refer to cfgetispeed().
SEE ALSOcfgetispeed(), cfgetospeed(), cfsetospeed(), tcsetattr(), the Base Def‐
initions volume of IEEE Std 1003.1-2001, Chapter 11, General Terminal
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 .
IEEE/The Open Group 2003 CFSETISPEED(3P)