Mercurial > hg > toybox
view toys/other/pivot_root.c @ 979:53a9bcb938f0
Move renice from pending to posix, default y, fix link to standard.
author | Rob Landley <rob@landley.net> |
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date | Wed, 31 Jul 2013 16:36:57 -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]); }