Mercurial > hg > toybox
view toys/other/pivot_root.c @ 1104:e11684e3bbc5 draft
Merge toynet.h into toys.h: musl supports it and micromanaging uClibc config options isn't very interesting anymore.
author | Rob Landley <rob@landley.net> |
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date | Sat, 02 Nov 2013 14:24:33 -0500 |
parents | 9e00446064fa |
children | da72fa267b7b |
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/* pivot_root.c - edit system mount tree * * Copyright 2012 Rob Landley <rob@landley.net> USE_PIVOT_ROOT(NEWTOY(pivot_root, "<2>2", TOYFLAG_USR|TOYFLAG_BIN)) config PIVOT_ROOT bool "pivot_root" default y help usage: pivot_root OLD NEW Swap OLD and NEW filesystems (as if by simultaneous mount --move), and move all processes with chdir or chroot under OLD into NEW (including kernel threads) so OLD may be unmounted. The directory NEW must exist under OLD. This doesn't work on initramfs, which can't be moved (about the same way PID 1 can't be killed; see switch_root instead). */ #define FOR_pivot_root #include "toys.h" #include <linux/unistd.h> void pivot_root_main(void) { if (syscall(__NR_pivot_root, toys.optargs[0], toys.optargs[1])) perror_exit("'%s' -> '%s'", toys.optargs[0], toys.optargs[1]); }