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I am FUSE mounting a remote FreeBSD machine with

sudo sshfs -C user@remote-ip:/home/user/ /mnt/localmnt/ -o allow_other -o SmartcardDevice=/dev/hidraw7

to authenticate via an OpenPGP smartcard device. I've tried this as both root and non-root users. This ties up standard input instead of returning to shell like a regular mount command, but the output of mount shows it is mounted:

user@remote-ip:/home/user/ on /mnt/freebsd type fuse.sshfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)

I've removed default_permissions per Mount with sshfs and write file permissions.

Unfortunately sudo ls and sudo cp hang on the local mount-point, without any error output in dmesg. Why would this happen?

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This question started with trying to authenticate sshfs with an OpenPGP smartcard, then was edited to its current form when I thought authentication was solved.

My current problem was using -o SmartcardDevice=/dev/hidraw7, which started because otherwise I was getting a password prompt from the remote host. (Users have passwords disabled and are setup for key authentication only.)

My initial problem was caused by running sudo sshfs, but I'm not sure why this is. Running sshfs as a non-root user and also omitting SmartcardDevice correctly prompts for smart-card PIN authentication, then mounts as expected with all local utilities working.

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