TIOCEXCL(2const)                                              TIOCEXCL(2const)

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.

SEE ALSO
       ioctl(2), ioctl_tty(2)

Linux man-pages 6.19              2026-02-08                  TIOCEXCL(2const)