Re: (Child) Locking the CD tray in software

From: Robert Wood (rob_at_rnwood.co.uk)
Date: 02/17/05

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    To: debian-user@lists.debian.org
Date: Thu, 17 Feb 2005 08:01:35 +0000

    On Wednesday 16 Feb 2005 18:01, Nazri Ramliy wrote:
    > Hi list.
    >
    > My 15 months old amuses himself by opening and closing the CDROM tray
    > on my box by pressing the eject button, waits for the tray to come
    > out, then pushes it back in. He does this over and over.
    >>cut
    >
    > Anybody know of any cd tools to keep the tray closed, i.e. ignoring
    > the signal from the eject button?

    This little bit of code sends the right ioctl to lock the tray of /dev/cdrom.

    To compile save into a file "blah.c" and run gcc -o lock blah.c

    #include <stdio.h>
    #include <sys/ioctl.h>
    #include <fcntl.h>
    #include <linux/cdrom.h>

    int main()
    {
            int fd = open("/dev/cdrom", O_RDONLY|O_NONBLOCK);
            if (fd == -1) { return -1; }

     int lock = 1; # change to 1 to unlock

            if (ioctl(fd, CDROM_LOCKDOOR, lock) == -1) { return -1; }
            close(fd);
            return 0;

    }

    Regards
    Rob 

    -- 
Robert Wood <rob@rnwood.co.uk>
http://www.rnwood.co.uk/
 "If you can't make something good,
  make something look good." - Bill Gates
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