/******************************************************************************/ /* */ /* Copyright (c) International Business Machines Corp., 2001 */ /* */ /* This program is free software; you can redistribute it and/or modify */ /* it under the terms of the GNU General Public License as published by */ /* the Free Software Foundation; either version 2 of the License, or */ /* (at your option) any later version. */ /* */ /* This program is distributed in the hope that it will be useful, but */ /* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY */ /* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License */ /* for more details. */ /* */ /* You should have received a copy of the GNU General Public License */ /* along with this program; if not, write to the Free Software */ /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* */ /******************************************************************************/ /******************************************************************************/ /* */ /* File: check_tray.c */ /* */ /* Description: This program checks the status of the cdrom drive, it will */ /* return the status as to if the cdrom device is open or is */ /* ready for use. */ /* */ /* History: */ /* Jan 8 2003 - Created - Manoj Iyer manjo@mail.utexas.edu */ /* - Note: In the 2.4.19 kenrel ioctl() & this so this program */ /* '2' even when there is no cdrom in the drive. This might be */ /* a kbug. So value 1 is not used in the script to check if */ /* drive is empty. */ /* */ /******************************************************************************/ #include <sys/stat.h> #include <fcntl.h> #include <linux/cdrom.h> #include <sys/ioctl.h> #include <stdlib.h> /******************************************************************************/ /* */ /* Function: main */ /* */ /* Description: This function opens the cdrom device, and checks the status */ /* of the drive. Note drop the cdrom inside the cd drive for */ /* this program to work usefully. */ /* */ /* Exit Vaules: 0 - No information. */ /* 1 - No disk in the drive. */ /* 2 - CD tray is open. */ /* 3 - CD drive not ready. */ /* 4 - CD disk in drive & drive closed. */ /* */ /******************************************************************************/ int main() { int fdcdrom = -1; if ((fdcdrom = open("/dev/cdrom", O_RDONLY | O_NONBLOCK)) == -1) exit(-2); exit(ioctl(fdcdrom, CDROM_DRIVE_STATUS)); }