--- apt-0.5.15cnc6/apt-pkg/contrib/cdromutl.cc~	2005-05-14 13:13:03 +0400
+++ apt-0.5.15cnc6/apt-pkg/contrib/cdromutl.cc~	2005-05-14 13:26:05 +0400
@@ -34,6 +34,7 @@ 
 #include <sys/stat.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <mntent.h>
 									/*}}}*/
 
 // IsMounted - Returns true if the mount point is mounted		/*{{{*/
@@ -100,6 +101,17 @@ bool UnmountCdrom(string Path)
       }
       else
       {
+        FILE *f;
+        if ((f = setmntent ("/proc/mounts", "r")) != NULL)
+        {
+          struct mntent *mnt;
+          while ((mnt = getmntent (f)) != NULL)
+            if (strcmp (Path.c_str(), mnt->mnt_dir) == 0)
+              if ((strcmp ("subfs", mnt->mnt_type) == 0) || (strcmp ("supermount", mnt->mnt_type) == 0))
+                _exit(0);
+          endmntent (f);
+        }
+
 	 const char *Args[10];
 	 Args[0] = "umount";
 	 Args[1] = Path.c_str();