From 07de470e437f204e3d40b8b0a85f57c1978ff9ed Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Sat, 9 Feb 2013 19:22:50 +0100 Subject: switch_root: Add a sanity check As switch_root basically does rm -Rf / we should make sure that / is really an initramfs. Signed-off-by: Richard Weinberger --- sys-utils/switch_root.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'sys-utils/switch_root.c') diff --git a/sys-utils/switch_root.c b/sys-utils/switch_root.c index f0ef67745..f26f7dae4 100644 --- a/sys-utils/switch_root.c +++ b/sys-utils/switch_root.c @@ -174,7 +174,13 @@ static int switchroot(const char *newroot) if (cfd >= 0) { pid = fork(); if (pid <= 0) { - recursiveRemove(cfd); + if (fstat(cfd, &sb) == 0) { + if (sb.st_dev == makedev(0, 1)) + recursiveRemove(cfd); + else + warn(_("old root filesystem is not an initramfs")); + } + if (pid == 0) exit(EXIT_SUCCESS); } -- cgit v1.2.3-55-g7522