哪个熔断器连接对应哪个安装座？

Question

In Linux /sys/fs/fuse/connections (or anywhere you mount fusectl ) exposes a control interface for fuse metadata. But how do you know which of your fuse mounts corresponds to which numbered subdirectory in there?

Alternatively, how can your userspace program that's implementing a specific fuse filesystem know which connection number it has?

Answer 1

The directory is a "device number". For example:

$ ls /sys/fs/fuse/connections/
44/
$ stat -c %d /run/user/1000/gvfs
44

I guess:

$ < /proc/mounts cut -d' ' -f2 | xargs stat -c '%d %n' | sort | join -t' ' -11 -21 - <(find /sys/fs/fuse/connections -maxdepth 1 -mindepth 1 -type d -printf '%f\n' | sort)
44 /run/user/1000/gvfs
49 /home/kamil/a
53 /home/kamil/b