diff -Naur sysvinit-2.86.orig/src/halt.c sysvinit-2.86/src/halt.c
--- sysvinit-2.86.orig/src/halt.c	2004-07-30 14:16:18.000000000 +0200
+++ sysvinit-2.86/src/halt.c	2006-04-22 01:10:31.000000000 +0200
@@ -37,24 +38,28 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/mount.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <utmp.h>
 #include <fcntl.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/times.h>
-#include <time.h>
 #include <signal.h>
-#include <stdio.h>
-#include <getopt.h>
+#include <termios.h>
 #include "reboot.h"
 
-char *Version = "@(#)halt  2.86  31-Jul-2004 miquels@cistron.nl";
 char *progname;
 
 #define KERNEL_MONITOR	1 /* If halt() puts you into the kernel monitor. */
 #define RUNLVL_PICKY	0 /* Be picky about the runlevel */
 
+#ifndef MNT_DETACH
+#define MNT_DETACH 0x00000002
+#endif
+#define UMOUNT(x) umount2(x,MNT_DETACH)
+
 extern int ifdown(void);
 extern int hddown(void);
 extern void write_wtmp(char *user, char *id, int pid, int type, char *line);
@@ -262,6 +270,50 @@
 
 	if (do_nothing) exit(0);
 
+	/* KNOPPIX: Umount /KNOPPIX, unload/eject CD-Rom */
+	/* All these are really syscalls */
+
+	/* check the environment variable NOEJECT */
+	{
+	  char *noeject=getenv("NOEJECT") ;
+	  /* if it is not defined or not equal to "yes" then we eject */
+	  if ( (!noeject) || !(!strcmp(noeject,"yes")||!strcmp(noeject,"true")) ) {
+	    
+	    for(c=1;c<=3;c++) /* Attempt to umount this many times */
+	      {
+		if(UMOUNT("/KNOPPIX")==0)
+		  {
+		    char *msg1="Please remove CD, close cdrom drive and hit return.";
+		    char *msg2="\rShutdown complete.";
+		    /* missing in linux/module.h */
+		    extern int delete_module(const char *);
+		    usleep(250000); delete_module("cloop"); usleep(250000);
+		    if(UMOUNT("/cdrom")!=EBUSY)
+		      {
+			char *noprompt=getenv("NOPROMPT");
+			/* if it is not defined or not equal to "yes" then we eject */
+			if ( (!noprompt) || !(!strcmp(noprompt,"yes")||!strcmp(noprompt,"true")) ) {
+			  write(2,msg1,strlen(msg1)); tcflush(1,TCIFLUSH); getchar();
+			  write(2,msg2,strlen(msg2));
+			  usleep(250000);
+			}
+		      }
+		    break;
+		  }
+		else
+		  {
+		    if(errno==EBUSY)
+		      {
+			char *msg=c<3?"Can't unmount CD yet...\n":
+			  "Can't unmount CD, please reset.\n";
+			write(2,msg,strlen(msg));
+		      }
+		    sleep(3);
+		  }
+	      }
+	  }
+	}
+
 	if (do_reboot) {
 		init_reboot(BMAGIC_REBOOT);
 	} else {