Re: New option for ln, firmlinks!

[Andreas Schwab]

"Alfred M. Szmidt" <ams@kemisten.nu> writes:

>    > hurd:/home/ams/coreutils/coreutils/src# ./ln -s /ams/foo symlink
>    > hurd:/home/ams/coreutils/coreutils/src# ./ln -m /ams/foo firmlink
>    > hurd:/home/ams/coreutils/coreutils/src# cd symlink
>    > hurd:/home/ams/coreutils/coreutils/src/symlink# ls ..
>    > foo  hurd.obj  lost+found  oskit.obj  sub-hurd
>    > hurd:/home/ams/coreutils/coreutils/src/symlink# cd ../firmlink 
>    > hurd:/home/ams/coreutils/coreutils/src/firmlink# ls ..
>    > CVS
>    > Makefile
>    > Makefile.am
>    > [..snip...]
>
>    This looks similar to bind mounts in Linux.
>
> Are those the same thing as union file-systems

I don't know much about union file-systems, but AFAIK they are different
from bind mounts.  A bind mount is created by "mount -o bind /foo /bar"
and causes the tree under /foo to be overlayed over /bar, with the former
contents of /bar being hidden.  It's like a regular mount, except that the
source is not (a filesystem on) a block device, but a directory.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Maxfeldstraße 5, 90409 Nürnberg, Germany
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