TIOCGLCKTRMIOS2const
Locking the termios structre
Part of TIOCSLCKTRMIOS(2const).
Usage
#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)
Overview
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_ADMINcapability 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>.
Releases
2 releases since Debian 13 (Trixie); the text changed 1 time.