TIOCSLCKTRMIOS(2const) - Linux manual page (original) (raw)

TIOCSLCKTRMIOS(2const) TIOCSLCKTRMIOS(2const)

NAME top

   TIOCGLCKTRMIOS, TIOCSLCKTRMIOS - locking the termios structre

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#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 top

   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 top

   On success, 0 is returned.  On error, -1 is returned, and _[errno](../man3/errno.3.html)_ is
   set to indicate the error.

ERRORS top

   **EPERM** Insufficient permission.

CAVEATS top

   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 top

   [ioctl(2)](../man2/ioctl.2.html), [ioctl_tty(2)](../man2/ioctl%5Ftty.2.html), [TCSETS(2const)](../man2/TCSETS.2const.html)

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Linux man-pages 6.10 2024-07-23 TIOCSLCKTRMIOS(2const)

Pages that refer to this page:ioctl_tty(2)