plucky (2) TIOCGLCKTRMIOS.2const.gz

NAME

       TIOCGLCKTRMIOS, TIOCSLCKTRMIOS - locking the termios structre

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #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;

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>.

SEE ALSO

       ioctl(2), ioctl_tty(2), TCSETS(2const)