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                                   CFSETOSPEED(3POSIX)

       The cfsetospeed() function shall set the output 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 cfsetospeed() 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.

       cfsetospeed — set output 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, cfsetospeed() shall return 0; otherwise, it shall return -1 and errno may be
       set to indicate the error.

cfgetispeed(), cfgetospeed(), cfsetispeed(), tcsetattr()

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

       #include <termios.h>

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