TIOCGLCKTRMIOS, TIOCSLCKTRMIOS - locking the termios structre

Please note that structtermios from <asm/termbits.h> is different and incompatible with structtermios from <termios.h>. These ioctl calls require structtermios from <asm/termbits.h>.

The termios structure of a terminal can be locked. The lock is itself a termios structure, with nonzero bits or fields indicating a locked value. TIOCGLCKTRMIOS Gets the locking status of the termios structure of the terminal. TIOCSLCKTRMIOS Sets the locking status of the termios structure of the terminal. Only a process with the CAP_SYS_ADMIN capability can do this.

EPERM Insufficient permission.

Standard C library (libc, -lc)

TIOCGLCKTRMIOS, TIOCSLCKTRMIOS - locking the termios structre

On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error.

ioctl(2), ioctl_tty(2), TCSETS(2const) Linux man-pages 6.9.1 2024-06-13 TIOCSLCKTRMIOS(2const)

#include<asm/termbits.h> /* Definition of TIOC*CLKTRMIOS constants */ #include<sys/ioctl.h>intioctl(intfd,TIOCGLCKTRMIOS,structtermios*argp);intioctl(intfd,TIOCSLCKTRMIOS,conststructtermios*argp);#include<asm/termbits.h>structtermios;