What is the equivalent to
mount -o remount,ro in an
The only way I know is to do
fusermount -u and then mount it again with
sshfs -o ro.
FUSE doesn't have any generic support for the
remount option. In 2006 with FUSE 2.6 this was described as impossible to do for a FUSE-based filesystem without patching FUSE itself (fuse-devel thread “Remounting in FUSE support”). There doesn't seem to have been any progress since then.
There are requests for remount support in SSHFS (e.g. Ubuntu bug #1037500) and other FUSE filesystems around the web, none fulfilled that I could find.