~ # echo "switch_root /target /target/sbin/init --log-level=debug --log-target=kmsg" >/init-ctl/stdin
~ # + read IN
+ [ switch_root /target /target/sbin/init --log-level=debug --log-target=kmsg = continue ]
+ switch_root /target /target/sbin/init --log-level=debug --log-target=kmsg
BusyBox v1.21.1-jb static (2014-01-28 17:46 +0000) multi-call binary.

Usage: switch_root [-c /dev/console] NEW_ROOT NEW_INIT [ARGS]

Free initramfs and switch to another root fs:
chroot to NEW_ROOT, delete all in /, move NEW_ROOT to /,
execute NEW_INIT. PID must be 1. NEW_ROOT must be a mountpoint.

        -c DEV  Reopen stdio to DEV after switch

+ read IN
+ :



~ # echo "switch_root /target /init-debug" >/init-ctl/stdin
~ # + read IN
+ [ switch_root /target /init-debug = continue ]
+ switch_root /target /init-debug
BusyBox v1.21.1-jb static (2014-01-28 17:46 +0000) multi-call binary.

Usage: switch_root [-c /dev/console] NEW_ROOT NEW_INIT [ARGS]

Free initramfs and switch to another root fs:
chroot to NEW_ROOT, delete all in /, move NEW_ROOT to /,
execute NEW_INIT. PID must be 1. NEW_ROOT must be a mountpoint.

        -c DEV  Reopen stdio to DEV after switch

+ read IN
+ :



~ # mount
rootfs on / type rootfs (rw)
devtmpfs on /dev type devtmpfs (rw,relatime,size=413116k,nr_inodes=103279,mode=755)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
sysfs on /sys type sysfs (rw,relatime)
proc on /proc type proc (rw,relatime)
/dev/mmcblk0p39 on /data type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)
/dev/mmcblk0p39 on /target type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)
/dev/mmcblk0p39 on /target/data type ext4 (rw,relatime,user_xattr,barrier=1,data=ordered)


~ # ls /target/init-debug
/target/init-debug