cfsetospeed - set output baud rate
int cfsetospeed(struct termios *termios_p, speed_t speed);
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.
Upon successful completion, cfsetospeed() shall return 0; otherwise, it shall return -1 and errno may be set to indicate the error.
The cfsetospeed() function may fail if:
- The speed value is not a valid baud rate.
- The value of speed is outside the range of possible speed values as specified in <termios.h>.
Refer to cfgetispeed().
cfgetispeed(), cfgetospeed(), cfsetispeed(), tcsetattr(), the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 11, General Terminal Interface, <termios.h>
First released in Issue 3. Included for alignment with the POSIX.1-1988 standard.
The following new requirements on POSIX implementations derive from alignment with the Single UNIX Specification:
The optional setting of errno and the [EINVAL] error conditions are added.