Not having Access() means go-fuse emulates it by looking at Getattr().
This works fine most of the time, but breaks down on sshfs, where
sshfs-benchmark.bash shows this:
gocryptfs/tests$ ./sshfs-benchmark.bash nuetzlich.net
working directory: /tmp/sshfs-benchmark.bash.JQC
sshfs mounted: nuetzlich.net:/tmp -> sshfs.mnt
gocryptfs mounted: sshfs.mnt/sshfs-benchmark.bash.Wrz/gocryptfs.crypt -> gocryptfs.mnt
sshfs-benchmark.bash: sshfs gocryptfs-on-sshfs
git init 3.98 6.80
rsync 7.71 10.84
rm -R 4.30rm: descend into write-protected directory 'gocryptfs.mnt/git1'?
The go-fuse emulation gets it wrong here because sshfs reports
permissions but does not enforce them.
Implement it ourselves properly.
09954c4bde