"Snap" question

[Robert Heller]

I just installed xv under snap using the instructions here:

https://snapcraft.io/install/xv/ubuntu

And I am encountering a "weirdness" (at least to me).  I can only access and 
view images that are under $HOME.  Images located elsewhere yield a file not 
found error (the files are in fact there and I was able to view them with xv 
installed under CentOS 6 (from a standard RPM).

Background: I needed to jump from CentOS 6 to Ubuntu 18.04 on my laptop, so I 
installed Ubuntu 18.04 on a separate LVM volume on my laptop. I use LVM on my 
laptop and have a number of LVM volumes:

Filesystem                        Size  Used Avail Use% Mounted on
udev                              1.9G     0  1.9G   0% /dev
tmpfs                             385M  1.8M  383M   1% /run
/dev/mapper/vg_newgollum-UB1804    12G  7.1G  4.1G  64% /
tmpfs                             1.9G  115M  1.8G   6% /dev/shm
tmpfs                             5.0M  4.0K  5.0M   1% /run/lock
tmpfs                             1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/loop1                         98M   98M     0 100% /snap/core/10444
/dev/loop2                         36M   36M     0 100% /snap/gtk-common-themes/1198
/dev/loop3                        141M  141M     0 100% /snap/gnome-3-26-1604/82
/dev/loop4                        2.3M  2.3M     0 100% /snap/gnome-calculator/260
/dev/loop5                         15M   15M     0 100% /snap/gnome-logs/45
/dev/loop6                         92M   92M     0 100% /snap/core/6531
/dev/loop8                         13M   13M     0 100% /snap/gnome-characters/139
/dev/loop10                       3.8M  3.8M     0 100% /snap/gnome-system-monitor/57
/dev/loop12                        87M   87M     0 100% /snap/core/4486
/dev/loop14                        56M   56M     0 100% /snap/core18/1932
/dev/mapper/vg_newgollum-mp3s      19G   14G  4.4G  76% /mp3s
/dev/mapper/vg_newgollum-scratch   40G   36G  1.7G  96% /scratch
/dev/mapper/vg_newgollum-lv_home   30G   27G  974M  97% /home
/dev/sda1                         477M  316M  132M  71% /boot
tmpfs                             385M   16K  385M   1% /run/user/120
tmpfs                             385M   40K  385M   1% /run/user/5125
/dev/mapper/vg_newgollum-lv_root   20G   14G  4.9G  74% /mnt
/dev/loop15                       384K  384K     0 100% /snap/gnome-characters/570
/dev/loop16                       1.0M  1.0M     0 100% /snap/gnome-logs/100
/dev/loop17                       2.3M  2.3M     0 100% /snap/gnome-system-monitor/148
/dev/loop18                       2.5M  2.5M     0 100% /snap/gnome-calculator/826
/dev/loop19                       141M  141M     0 100% /snap/gnome-3-26-1604/100
/dev/loop0                         65M   65M     0 100% /snap/gtk-common-themes/1514
/dev/loop20                       218M  218M     0 100% /snap/gnome-3-34-1804/60
/dev/loop7                        4.4M  4.4M     0 100% /snap/xv/9

Is there some "magic" to allow xv to view files anywhere on any file system 
(permissions permitting)?

-- 
Robert Heller             -- Cell: 413-658-7953 GV: 978-633-5364
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