testcases/commands/eject/check_tray.c

   1 /******************************************************************************/
   2 /*                                                                            */
   3 /* Copyright (c) International Business Machines  Corp., 2001                 */
   4 /*                                                                            */
   5 /* This program is free software;  you can redistribute it and/or modify      */
   6 /* it under the terms of the GNU General Public License as published by       */
   7 /* the Free Software Foundation; either version 2 of the License, or          */
   8 /* (at your option) any later version.                                        */
   9 /*                                                                            */
  10 /* This program is distributed in the hope that it will be useful, but        */
  11 /* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY */
  12 /* or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   */
  13 /* for more details.                                                          */
  14 /*                                                                            */
  15 /* You should have received a copy of the GNU General Public License          */
  16 /* along with this program;  if not, write to the Free Software                   */
  17 /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA    */
  18 /*                                                                                                                */
  19 /******************************************************************************/
  20
  21 /******************************************************************************/
  22 /*                                                                            */
  23 /* File:        check_tray.c                                                  */
  24 /*                                                                            */
  25 /* Description: This program checks the status of the cdrom drive, it will    */
  26 /*              return the status as to if the cdrom device is open or is     */
  27 /*              ready for use.                                                */
  28 /*                                                                            */
  29 /* History:                                                                   */
  30 /* Jan 8 2003 - Created - Manoj Iyer manjo@mail.utexas.edu                    */
  31 /*            - Note: In the 2.4.19 kenrel ioctl() & this so this program     */
  32 /*              '2' even when there is no cdrom in the drive. This might be   */
  33 /*              a kbug. So value 1 is not used in the script to check if      */
  34 /*              drive is empty.                                               */
  35 /*                                                                            */
  36 /******************************************************************************/
  37
  38 #include <sys/stat.h>
  39 #include <fcntl.h>
  40 #include <linux/cdrom.h>
  41 #include <sys/ioctl.h>
  42 #include <stdlib.h>
  43
  44 /******************************************************************************/
  45 /*                                                                            */
  46 /* Function:    main                                                          */
  47 /*                                                                            */
  48 /* Description: This function opens the cdrom device, and checks the status   */
  49 /*              of the drive. Note drop the cdrom inside the cd drive for     */
  50 /*              this program to work usefully.                                */
  51 /*                                                                            */
  52 /* Exit Vaules: 0 - No information.                                           */
  53 /*              1 - No disk in the drive.                                     */
  54 /*              2 - CD tray is open.                                          */
  55 /*              3 - CD drive not ready.                                       */
  56 /*              4 - CD disk in drive & drive closed.                          */
  57 /*                                                                            */
  58 /******************************************************************************/
  59
  60 int
  61 main()
  62 {
  63     int fdcdrom = -1;
  64
  65         if ((fdcdrom = open("/dev/cdrom", O_RDONLY|O_NONBLOCK)) == -1)
  66                 exit(-2);
  67
  68         exit (ioctl(fdcdrom, CDROM_DRIVE_STATUS));
  69 }