Better detection of mounted sshfs filesystems.

We used to look for /usr/bin/sshfs process instances
to see if something is mounted, but that's not very realiable,
because it may tell you that something is mounted
even though it hasn't fully completed the mounting process.

This new method uses mount -l, which is more reliable, faster and simpler.

sftpman/model.py

@@ -47,20 +47,11 @@ def get_available_ids(self):
         return [file_name[0:-3] for file_name in cfg_files if file_name.endswith('.js')]
 
     def get_mounted_ids(self):
-        # Looking for /mnt/sshfs/{id}
-        regex = re.compile("/usr/bin/sshfs(?:.+?)%s(\w+)$" %
-                           re.escape(self.mount_path_base))
-
-        processes = shell_exec("/bin/ps ux | /bin/grep '/usr/bin/sshfs'")
-        ids = []
-        for line in processes.split("\n"):
-            if self.mount_path_base not in line:
-                continue
-            match_object = re.search(regex, line)
-            if (match_object is None):
-                continue
-            ids.append(match_object.group(1))
-        return ids
+        # Looking for /mnt/sshfs/{id} in output that looks like this:
+        # user@host:/remote/path on /mnt/sshfs/id type fuse.sshfs ...
+        regex = re.compile(' %s(\w+) ' % self.mount_path_base)
+        mounted = shell_exec('mount -l -t fuse.sshfs')
+        return regex.findall(mounted)
 
     def get_unmounted_ids(self):
         ids_mounted = self.get_mounted_ids()