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-rw-r--r--klibc-utils/run-init.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/klibc-utils/run-init.c b/klibc-utils/run-init.c
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+++ b/klibc-utils/run-init.c
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+/*
+ * 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"
+//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 */