plucky (2) TIOCCONS.2const.gz

NAME

       TIOCCONS - redirecting console output

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <asm/termbits.h>  /* Definition of TIOCCONS */
       #include <sys/ioctl.h>

       int ioctl(int fd, TIOCCONS);

DESCRIPTION

       Redirect  output  that would have gone to /dev/console or /dev/tty0 to the given terminal.  If that was a
       pseudoterminal master, send it to the slave.

       Only a process with the CAP_SYS_ADMIN capability may do this.

       If output was redirected already, then EBUSY is returned, but redirection can be stopped  by  using  this
       ioctl with fd pointing at /dev/console or /dev/tty0.

RETURN VALUE

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

ERRORS

       EBUSY  Output was redirected already.

       EPERM  Insufficient permission.

HISTORY

       Before  Linux 2.6.10, anybody can do this as long as the output was not redirected yet; CAP_SYS_ADMIN was
       not necessary.

SEE ALSO

       ioctl(2), ioctl_tty(2)