rclone: getcwd syscall does not work in rclone mounted drives

What is the problem you are having with rclone?

Programs that use the getcwd() syscall fail when inside an rclone mount with ENOENT.

For example I go into a rclone mounted drive cd ~/dropbox/Documents, then run something like node -p "process.cwd()", this fails with ENOENT.

I even made a basic C script with nothing but the syscall:

#include <unistd.h>
#include <stdio.h>
#include <limits.h>

int main() {
  char cwd[PATH_MAX];
  if (getcwd(cwd, sizeof(cwd)) != NULL) {
    printf("%s\n", cwd);
  } else {
    perror("getcwd() error");
    return 1;
  }
  return 0;
}

Which also fails, so this confirms it’s the syscall failing and not something in Node/Python.

NOTE: This only fails in a subdirectory, it does not fail in the mount directory itself e.g. ~/mount/ is fine, but ~/mount/subdirectory/ is not.

What is your rclone version (output from rclone version)

1.51.0

Which OS you are using and how many bits (eg Windows 7, 64 bit)

Ubuntu 18.04 and 19.10 both fail.

Which cloud storage system are you using? (eg Google Drive)

Multiple, failed for WebDAV (nextcloud), Dropbox and Google Drive.

The command you were trying to run (eg rclone copy /tmp remote:tmp)

The WebDAV (nextcloud) is mounted as:

/usr/bin/rclone mount nextcloud:/ /home/jamesernator/nextcloud

The google drive is mounted as:

/usr/bin/rclone mount googleDrive:/ /home/jamesernator/googleDrive --dir-cache-time 30s --cache-dir /home/jamesernator/.rclone-mount-cache/ --vfs-cache-max-age 720h0m0s --vfs-cache-mode full --vfs-cache-max-size 2G

And dropbox is mounted using a cache remote with:

/usr/bin/rclone mount dropbox-cache:/ /home/jamesernator/dropbox

NOTE: All are mounted automatically through systemd services, however manually mounting does not fix the situation.

A log from the command with the -vv flag (eg output from rclone -vv copy /tmp remote:tmp)

This logs contains the results of running rclone mount -vv "nextcloud:/" ~/nextcloud-test/ 2> out.log" followed by the following two commands in zsh` (in a separate shell):

cd nextcloud-test/Documents
node -e 'process.cwd()'

out.log