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Accepted
K.Wanter
Asked: 2018-06-28 06:37:53 +0800 CST

sshfs empty the source path with -o nonempty

  • 772

I came across a strange mistake, I have some data on machine1 at

/temp/user1/data/

I want to share it with another machine2, so I created same directory as 

mkdir /temp/user1/data/

then on machine1, I do

sshfs /temp/user1/data user1@machine2:/temp/user1/data

it prompts

fuse: mountpoint is not empty
fuse: if you are sure this is safe, use the 'nonempty' mount option

then I do

sshfs -o nonempty /temp/user1/data user1@machine2:/temp/user1/data

suddenly, my data on machine1 under /temp/user1/data are all gone, leaving an empty folder! all data lossed! what is wrong, can I got my data back?

ssh sshfs

1 Answers

  1. Best Answer

    You've mounted the remote machine's (empty) /temp/user1/data over the local machine's /temp/user1/data. All should be good if you simply unmount the SSHFS mount (using fusermount, since sshfs uses fuse under the hood).

    Ex. we have a non-empty local directory

    $ ls vm
somefile

    then we mistakenly mount a remote directory over it:

    $ sshfs vm vm:/home/steeldriver/dir
fuse: mountpoint is not empty
fuse: if you are sure this is safe, use the 'nonempty' mount option
$ sshfs -ononempty vm vm:/home/steeldriver/dir

    Now when we list vm, we see the contents of the remote dir instead:

    $ ls vm
$

    but if we unmount the SSHFS filesystem the local directory contents become visible again:

    $ fusermount -u vm
$ ls vm
somefile
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