cfsetospeed

Synopsis

#include <termios.h>

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

Status

Implemented

Conformance

IEEE Std 1003.1-2017

Description

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 value of speed is not validated: the speed constants defined in <termios.h> are equal to the baud rates they name (for example B9600 is 9600).

Return value

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

Errors

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>.

POSIX deviations

No POSIX deviations discovered.