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(am-utils.info)Loopback Filesystem

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Loopback Filesystem (`lofs')
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   The "lofs" (`type:=lofs') filesystem is also called the loopback
filesystem.  It mounts a local directory on another, thus providing
mount-time binding to another location (unlike symbolic links).

   The loopback filesystem is particularly useful within the context of
a chroot-ed directory (via chroot(2)), to provide access to directories
otherwise inaccessible.

The following option must be specified:

`rfs'
     the pathname to be mounted on top of `${fs}'.

   Usually, the FTP server runs in a chroot-ed environment, for security
reasons.  In this example, lofs is used to provide a subdirectory within
a user's home directory, also available for public ftp.

     lofs      type:=lofs;rfs:=/home/ezk/myftpdir;fs:=/usr/ftp/pub/ezk