Implement checks or listeners for vaults states about cryptor

[phpony]

Done.

[phpony]

After some experiments findmnt was found to be a bit problematic, but mountpoint -q works like a charm.

[phpony]

mountpoint is a part of utiul-linux project and is, as the documentation of the project itself says, a random collection of Linux® utilities. This project is packaged in most distributions under the name util-linux and is installed by default. So relying on mountpoint command is a safe choice in most cases.

[moson-mo]

Actually I just noticed there is GLib.Mount (not sure why I have not seen this earlier 🤷🏻).
With that we can get a list of mounts and it would also allow unmounting. That would be much nicer than calling external programs 😉.

Let me know if you want to give it a shot to implement it with this, otherwise I'll have a look when time allows.

[phpony]

Yes, GLib.Mount looks just like what was needed. Seems like it can be used both for monitoring current state of mounts and for unmounting them. I'll pull off my PR for now then and will try to code this better approach.

[phpony]

After a bit of testing now I'm not so sure about it. GLib.Mount it's not the same as a unix mount, and so the monitor.get_mounts () method results are limited to very specific cases. The mounts it provides are filtered according to gvfs ruleset, so basically it returns and subscribes to events only for mounts in /media, $HOME or /run/media/$USER folders.

For example, in my system when I do mkdir /home/phpony/test && gocryptfs /some/crypto /home/phpony/test than monitor.get_mounts () returns a single mount with mount.get_root ().get_path () => /home/phpony/test and I'm able to monitor and determine it's state via GLib.Mount. But when I do mkdir /mnt/test && gocryptfs /some/crypto /mnt/test the monitor.get_mounts () returns zero mounts.

There's an option to do gocryptfs /some/crypto /mnt/test -o x-gvfs-show that allows to monitor /mnt/test via GLib.Mount (and makes this mount pop in Nautilus sidebar as ejectable drive), but again - this will work only for vaults that were mounted with this option from the start, so it's not universal and is very limited too.

Alas I found all this limitations non-intuitive and too obstructive for our case. Neither of my gocryptfs mounts are in those 3 folders so GLib.Mount is just not working for me. mountpoint -q on the other hand works for any mount wherever it is if user has access to it.

While struggling with GLib.Mount I've created a better wrapper for is_mounted checks, so at least I can provide a better PR with old mountpoint way, if you're interested.

[moson-mo]

oof, that's unfortunate. Thanks for checking.

There is also: https://valadoc.org/gio-unix-2.0/GLib.UnixMountEntry.html

foreach (unowned var mount in UnixMountEntry.get (null)) {
    print("%s\n", mount.get_mount_path ());
}

That might do it 🤔 (at least for checking if it's mounted I guess)

[phpony]

Can confirm, this function works fine:

      private void capture_mounts () {
           foreach (var vault in config.vaults) {
               vault.is_mounted = false;
           }
           foreach (unowned var mount in UnixMountEntry.get (null)) {
               foreach (var vault in config.vaults) {
                   if (vault.mount_point == mount.get_mount_path ()) {
                      vault.is_mounted = true;
                   }
               }
           }
       }

Will create a PR from this a bit later.