Amiberry and SMB backup (symlinks)

sleve_mcdichael

Long time ago, I used to have this weird problem where, during a backup to my PC via SMB, the PC would periodically pop up a window about some files needing administrator permission, interrupting the transfer until I responded, and then, no matter whether I clicked "continue" or "skip," the files would not be copied either way.

Tracked it down to when a symlink points to a location outside the network share. I had a small handful of these, and all of them were of my own fault...until now. When I started playing with Commodore Amiga and Amiberry.

Some of the files in /opt/retropie/configs/amiga/amiberry/whdboot/save-data/Kickstarts are symlinks back to /opt/retropie/emulators/amiberry/kickstarts. This itself is another link back to home/pi/RetroPie/BIOS/amiga which is within the network share, but that doesn't seem to matter because: when I copy configs to my PC, it gets to these files and interrupts the transfer until I click through, just like before.

It's okay that the files aren't copied (again, they're only symlinks and as they are created automatically, they can be created again by running configure I presume; or maybe the emulator itself, I've not yet worked out where they actually come from) but I'd rather it didn't interrupt the transfer halfway through every time.

Does anyone else experienced this, or anyone have a solutions? Supposing the links need to stay where they are and point to where they point to, maybe something with "wide links" in SMB config or something?

mitu

I think the symlinks in $configdir/amiga/amiberry/whdboot/save-data/Kickstarts are created by amiberry when it scans for Kickstarts the $biosdir/amiga (via the symlink) and not by the setup configure script.

That's inherited from Amiberry's old behavior or looking for Kickstarts/other resource files under the installation folder instead of using a separate (per-user) configuration folder.

This may have changed in the 4.x series, but haven't investigated yet. What problem are you exactly trying to solve - an unattended backup script/copying of the config share ?

sleve_mcdichael

@mitu said in Amiberry and SMB backup (symlinks):

What problem are you exactly trying to solve - an unattended backup script/copying of the config share ?

Exactly that. Occasionally I make a backup just by copying the folders over SMB to a location on my PC. This takes a good long while so I usually just click and drag to start the copy and then go to bed or leave the house for a while. But then when I come back, instead of being done it's just stalled there and waiting for my action before it will continue.

Lolonois

There are smb.conf options to follow symlinks outside the shared directory tree. If you trust everyone on your LAN you could edit your /etc/samba/smb.conf:

[global]
; unix extensions = yes            ; default is yes
allow insecure wide links = yes    ; <--- set this

[configs]
; follow symlinks = yes            ; default is yes
wide links = yes                   ; <--- and this

https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html#UNIXEXTENSIONS
https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html#ALLOWINSECUREWIDELINKS
https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html#FOLLOWSYMLINKS
https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html#WIDELINKS

sleve_mcdichael

@Lolonois said in Amiberry and SMB backup (symlinks):

There are smb.conf options to follow symlinks outside the shared directory tree. If you trust everyone on your LAN you could edit your /etc/samba/smb.conf:

Thanks. I think I had tried this before, but maybe I didn't have them in the right [global]/[configs] headings. In any case it's working now.

I understand there's a security risk here. I still wonder if there's a more elegant solution, or this is a compromise that will remain necessary in order to use this chosen backup method.

mitu

You could just get rid of the symlink-ed Kickstarts and keep them as files in the whdboot/save-data/Kickstarts folder. Amiberry should still work and the files would be backed-up like regular files.