This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       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 .

IEEE/The Open Group                                   2017                                   CFSETISPEED(3POSIX)

       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.

       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>.

       Thefollowingsectionsareinformative.

       None.

       None.

       cfsetispeed — set input baud rate

       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.

       Refer to cfgetispeed().

       Upon successful completion, cfsetispeed() shall return 0; otherwise, -1 shall be returned, and errno  may
       be set to indicate the error.

cfgetispeed(), cfgetospeed(), cfsetospeed(), tcsetattr()

       The Base Definitions volume of POSIX.1‐2017, Chapter11, GeneralTerminalInterface, <termios.h>

       #include <termios.h>

       int cfsetispeed(struct termios *termios_p, speed_t speed);