TIOCNXCL - exclusive mode

NAME LIBRARY SYNOPSIS DESCRIPTION RETURN VALUE HISTORY SEE ALSO

NAME

TIOCEXCL, TIOCGEXCL, TIOCNXCL − exclusive mode

LIBRARY

Standard C library (libc, −lc)

SYNOPSIS

#include <asm/termbits.h> /* Definition of TIOC*XCL constants */
#include <sys/ioctl.h>

int ioctl(int fd, TIOCEXCL);
int ioctl(int fd, TIOCGEXCL, int *argp);
int ioctl(int fd, TIOCNXCL);

DESCRIPTION

TIOCEXCL

Put the terminal into exclusive mode. No further open(2) operations on the terminal are permitted. (They fail with EBUSY, except for a process with the CAP_SYS_ADMIN capability.)

TIOCGEXCL

If the terminal is currently in exclusive mode, place a nonzero value in the location pointed to by argp; otherwise, place zero in *argp.

TIOCNXCL

Disable exclusive mode.

RETURN VALUE

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

HISTORY

TIOCGEXCL

Linux 3.8.