(ODROIDC)root@odroid:~# fw_printenv|grep ^snappy
snappy_ab=a
snappy_boot=if test "${snappy_mode}" = "try"; then if test "${snappy_trial_boot}" = "1"; then if test "${snappy_ab}" = "a"; then setenv snappy_ab "b"; else setenv snappy_ab "a"; fi; else setenv snappy_trial_boot "1"; saveenv; fi; fi; run loadfiles; setenv mmcroot "/dev/disk/by-label/system-${snappy_ab}"; run setup; run mmcargs; bootm ${kernel_addr} ${initrd_addr}:${initrd_size} ${fdt_addr}
snappy_cmdline=init=/lib/systemd/systemd ro panic=-1 fixrtc
snappy_mode=regular
snappy_trial_boot=0


(ODROIDC)root@odroid:~# ls -al /boot/uboot
total 137
drwxr-xr-x 4 root root    512 Jan  1  1970 .
drwxr-xr-x 4 root root   4096 Jul 23 12:59 ..
drwxr-xr-x 3 root root    512 Jul 23 13:59 a
drwxr-xr-x 3 root root    512 Jul 23 13:59 b
-rwxr-xr-x 1 root root   1580 Jul 23 15:30 snappy-system.txt
-rwxr-xr-x 1 root root    786 Jul 23 14:47 uEnv.txt
-rwxr-xr-x 1 root root 131072 Jul 23 14:42 uboot.env