A Command-Line CD Tray Opener

Originally published on: Thu, 20 Aug 2009 02:30:38 +0000

Please note! If you're having difficulties compiling the C source code presented below, please see my post: Compiling C from the Command Line with Pelles C

I needed a command-line utility for Windows that would open or close the CD tray. The result is cdctrl.exe. Please refer to the C source code below.

cdctrl.c

// cdctrl
// A command-line CD-ROM tray opener/closer.
//
// License: MIT / X11
// Copyright (c) 2009 by James K. Lawless
// jimbo@radiks.net http://www.radiks.net/~jimbo
// http://www.mailsend-online.com
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

#include <windows.h>
#include <stdio.h>
#include <ctype.h>

#pragma comment(lib, "winmm.lib")

void syntax(void);

int main(int argc,char **argv) {
   if(argc<2) {
      syntax();
      return 1;
   }
   if(toupper(*argv[1])=='O') {
      mciSendString("set CDAudio door open wait",0,0,0);
   }
   else
   if(toupper(*argv[1])=='C') {
      mciSendString("set CDAudio door closed",0,0,0);
   }
   else {
      syntax();
      return 1;
   }
   return 0;
}

void syntax(void) {
   printf("Syntax:\n\tcdctrl open\nor\n\tcdctrl close\n");
}

If you execute the above program with no arguments, you should see the following: Syntax: cdctrl open or cdctrl close

The source code and EXE for the cdctrl can be found here:

http://www.mailsend-online.com/wp/cdctrl.zip

Unless otherwise noted, all code and text entries are Copyright Š2009 by James K. Lawless

Views expressed in this blog are those of the author and do not necessary reflect those of the author's employer. Views expressed in the comments are those of the responding individual.

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