mjhjmtu

I mounted a SMB share folder under /mnt/smb/ and I can access the files. When I unmount this shared folder using command:

umount /mnt/smb/

naturally I cannot list shared folder contents using command:

ls /mnt/smb/

But the problem is when I run the ls command from a PHP file on the same machine, the contents of shared SMB folder can be listed! The contents of PHP file is:

<?php
 $command = 'ls /mnt/smb/';
 $result = shell_exec($command);
 echo $result;
?>

What is my mistake. Is there any other commanf needed for completely unmount the SMB share? I also used command below but there was no luck:

fusermount -u /mnt/smb/

Please repeat the umount command as needed, until the /mnt/smb folder is u(n)mounted according to ls in the shell. Then it should also be according to the mount command:

mount | grep /mnt/smb

so that the share really is not mounted any more. If some process still lists remote contents, it must be cached (unlikely in this php system call situation, though).

Any command can still see the mount point, of course, because it is a directory. Any local files that the directory contains will be listed, by php or from a shell.

In order to fix this last issue you could first move/remove the files from the local directory (while the share is not mounted), then do chmod 0 /mnt/smb as root to indicate the non-mountedness and create ls-errors while not mounted.