TIOCGLCKTRMIOS

(2const)

locking the termios structre

System callsmanpages-dev 6.9.1-1also documents TIOCSLCKTRMIOS

#include <asm/termbits.h> /* Definition of TIOC*CLKTRMIOS constants */ #include <sys/ioctl.h> int ioctl(int fd, TIOCGLCKTRMIOS, struct termios *argp); int ioctl(int fd, TIOCSLCKTRMIOS, const struct termios *argp); #include <asm/termbits.h> struct termios;

LIBRARY

Standard C library (libc, -lc)

DESCRIPTION

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.

RETURN VALUE

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

ERRORS

EPERM: Insufficient permission.

CAVEATS

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

LIBRARY

DESCRIPTION

RETURN VALUE

ERRORS

CAVEATS

See also