mount option does not work in guestmount

[LittleBigBrain]

```
# guestmount -a test.qcow2 -o uid=1000 -o gid=1000 -m /dev/sda1 /mnt
$ mount -l | grep /mnt
/dev/fuse on /mnt type fuse (rw,nosuid,nodev,relatime,user_id=0,group_id=0)
```
the user_id and group_id is not used.

[Richard Jones (rjones-redhat)]

Have you got the version of guestmount (guestmount --version)?

[LittleBigBrain (braingateway)]

guestmount 1.40.2

[Richard Jones (rjones-redhat)]

I'm afraid I don't know the answer but I can give some pointers to the code
so you can work out what's going on:

https://github.com/libguestfs/libguestfs/blob/master/fuse/guestmount.c

This is the program that is supposed to parse the -o options from
the command line. It adds them to a list of options (fuse_options)
that are passed to the libguestfs mount_local_* APIs. You should be
able to see the arguments being passed through to the API if you use
guestmount -x

https://github.com/libguestfs/libguestfs/blob/master/lib/fuse.c

This is where the API gets implemented. It's supposed to only pass
the options through to fuse_opt_add_arg where fuse does the rest.