| /* |
| * run-init implementation for busybox |
| * |
| * Copyright (c) 2017 Denys Vlasenko <vda.linux@gmail.com> |
| * |
| * Licensed under GPLv2, see file LICENSE in this source tree. |
| */ |
| //config:config RUN_INIT |
| //config: bool "run-init (7.7 kb)" |
| //config: default y |
| //config: select PLATFORM_LINUX |
| //config: help |
| //config: The run-init utility is used from initramfs to select a new |
| //config: root device. Under initramfs, you have to use this instead of |
| //config: pivot_root. |
| //config: |
| //config: Booting with initramfs extracts a gzipped cpio archive into rootfs |
| //config: (which is a variant of ramfs/tmpfs). Because rootfs can't be moved |
| //config: or unmounted, pivot_root will not work from initramfs. Instead, |
| //config: run-init deletes everything out of rootfs (including itself), |
| //config: does a mount --move that overmounts rootfs with the new root, and |
| //config: then execs the specified init program. |
| //config: |
| //config: util-linux has a similar tool, switch-root. |
| //config: run-init differs by also having a "-d CAPS_TO_DROP" option. |
| |
| /* applet and kbuild hooks are in switch_root.c */ |
