How to register FUSE filesystem type with mount(8)

问题:

I've written a small FUSE-based filesystem and now the only part's missing is that I want to register it with fstab(5) to auto-mount it on system startup and/or manually mount it with just mount /srv/virtual-db. How can I achieve this?

I know, I can just run /usr/bin/vdbfs.py /srv/virtual-db from some init script, but that's not exactly pretty.

I'm sorry because this may be not exactly a programming question, but it's highly related, as the packaging and deployment is still the programmer's job.

回答1:

In general, one "registers" a new mount filesystem type by creating an executable mount.fstype.

$ ln -s /usr/bin/vdbfs.py /usr/sbin/mount.vdbfs

If vdbfs.py takes mount-ish arguments (i.e. dev path [-o opts]), then mount -t vdbfs and using vdbfs as the 3rd field in fstab will work. If it doesn't, you can create a wrapper which does take arguments of that form and maps them to whatever your vdbfs.py takes.

FUSE should also install a mount.fuse executable; mount.fuse 'vdbfs.py#dev' path -o opts will go on and call vdbfs.py dev path -o opts. In that case, you can use fuse as your filesystem type and prefix your device with vdbfs.py#.

回答2:

So to clarify ephemient's answer, there are two options:

1. Edit /etc/fstab like this:

   # <file system>   <mount point>      <type>  <options>         <dump>  <pass>
   # ...
   vdbfs.py#<dev>    /srv/virtual-db    fuse    user,<other-opts>    0    0
   

   Or,

2. Create an executable prefixed with "mount." (ensuring it can be used with mount-like options):

   $ ln -s /usr/bin/vdbfs.py /usr/sbin/mount.vdbfs
   

   And edit /etc/fstab like this:

   # <file system> <mount point> <type>    <options>         <dump>  <pass>
   # ...
   <dev>    /srv/virtual-db    vdbfs.py    user,<other-opts>    0    0
   

With regards to auto-mounting at start up and manually mounting with mount, the user and noauto options are relevant and fully supported by fuse itself so you don't have to implement them yourself. The user option lets a non-priveleged user who is a member of the "fuse" group mount your filesystem with the mount command, and noauto directs your filesystem not to automatically mount at startup. If you don't specify noauto, it will automatically mount.

回答3:

You could just use fuse filesystem type. The following works on my system:

smbnetfs    /media/netbios    fuse    defaults,allow_other    0    0

Another example:

sshfs#[e-mail]:/    /mnt    fuse    user,noauto    0    0