I've run into puzzling problems with sysupgrade not being able to create the backup a few times now.
After adding luci-ssl-nginx to a build and flashing, sysupgrade fails with
Saving config files...
Failed to create the configuration backup.
Trying to manually tar up
/etc/ leads to
tar: /etc/nginx/luci_nginx.conf: No such file or directory
tar: /etc/nginx/luci_nginx_ssl.conf: No such file or directory
/rom/, but not in
/etc/nginx/. I either have to
touch or copy from
/rom/ to get through sysupgrade.
Has anyone else seen this?
That seems odd, I wonder if it's because no files are being specified?
Bu then again, gnu tar seems to silently fail according to this post:
Perhaps this changed with busybox tar recently?