BSD Terminal Modes

The usual way to get and set terminal modes is with the functions described in the section called “Terminal Modes”. However, on some systems you can use the BSD-derived functions in this section to do some of the same thing. On many systems, these functions do not exist. Even with the GNU C library, the functions simply fail with errno = ENOSYS with many kernels, including Linux.

The symbols used in this section are declared in sgtty.h.

function>struct sgttyb/function> This structure is an input or output parameter list for gtty and stty.

char sg_ispeed

Line speed for input

char sg_ospeed

Line speed for output

char sg_erase

Erase character

char sg_kill

Kill character

int sg_flags

Various flags

int function>gtty/function> (int filedes, struct sgttyb *attributes) This function gets the attributes of a terminal.

gtty sets *attributes to describe the terminal attributes of the terminal which is open with file descriptor filedes.

int function>stty/function> (int filedes, struct sgttyb * attributes) This function sets the attributes of a terminal.

stty sets the terminal attributes of the terminal which is open with file descriptor filedes to those described by *filedes.