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authorChris Lord <chris@openedhand.com>2005-01-24 21:55:51 +0000
committerChris Lord <chris@openedhand.com>2005-01-24 21:55:51 +0000
commit11c50f1f8175522c8b051a02540b6eea7198a9f0 (patch)
tree0af94ffea47dfad998811c9a3973a07ab83e0d5e /packages/unionfs/unionroot
parent13f2ab4c2d889723f10ce69853fbf99592d9eb89 (diff)
Update unionroot and make it ok for unionroot-utils
BKrev: 41f56ee7rTGHTsscs0Cx_5yS1RQSZg
Diffstat (limited to 'packages/unionfs/unionroot')
-rw-r--r--packages/unionfs/unionroot/init.unionroot90
1 files changed, 90 insertions, 0 deletions
diff --git a/packages/unionfs/unionroot/init.unionroot b/packages/unionfs/unionroot/init.unionroot
index e69de29bb2..90aa4b015e 100644
--- a/packages/unionfs/unionroot/init.unionroot
+++ b/packages/unionfs/unionroot/init.unionroot
@@ -0,0 +1,90 @@
+#!/bin/sh
+
+INIT=/sbin/init.sysvinit
+#OVERLAYS=/media/ram /media/cf /media/card
+ROOTBACKUP=/media/realroot
+UNION=/media/union
+PATH=/usr/bin:/usr/sbin:/bin:/sbin
+
+if ! test -e ${INIT}; then
+ echo >&2 "ERROR: ${INIT} not found"
+ exit 1
+fi
+
+if test x"$*" != "x"; then
+ exec ${INIT} $*
+fi
+
+if ! which unionctl; then
+ exec ${INIT}
+fi
+
+nodupmount () {
+ opts=""
+ type=""
+ while true; do
+ if test "$1" = "-o"; then
+ shift
+ opts="-o $1"
+ shift
+ elif test "$1" = "-t"; then
+ shift
+ type="$1"
+ shift
+ else
+ break
+ fi
+ done
+ if test x"$2" = "x"; then
+ mountpt="$1"
+ else
+ device="$1"
+ mountpt="$2"
+ fi
+ mountmatch="^[^ ]+ $mountpt $type"
+ # echo "NOTE: grep -E -q \"$mountmatch\" /proc/mounts"
+ if grep -E -q "$mountmatch" /proc/mounts; then
+ return 0;
+ fi
+ if test x"$type" != "x"; then
+ type="-t $type"
+ fi
+ echo >&2 "NOTE: executing mount $type $opts $device $mountpt"
+ mkdir -p $mountpt
+ /bin/mount.busybox $type $opts $device $mountpt
+ ret="$?"
+ if test "$ret" = "0"; then
+ wemounted="$wemounted $mountpt"
+ fi
+ return $ret
+}
+
+#set -x
+wemounted=""
+(
+ set -e
+ /bin/mount.busybox /proc
+ insmod /lib/modules/`uname -r`/kernel/fs/unionfs.o
+ nodupmount -t unionfs -o dirs=/.=rw none ${UNION}
+# nodupmount -o bind / ${UNION}/${ROOTBACKUP}
+# for OVERLAY in ${OVERLAYS}; do
+# nodupmount ${OVERLAY}
+# union-ctl /. --add --mode rw ${OVERLAY}
+# nodupmount -o bind ${OVERLAY} ${UNION}/${OVERLAY}
+# done
+ /bin/umount.busybox /proc
+# nodupmount -o bind /proc ${UNION}/proc
+# nodupmount -o bind / ${ROOTBACKUP}
+) || (
+ echo >&2 "ERROR: unable to setup mounts for chroot";
+ if test x"$wemounted" != "x"; then
+ # cleanup
+ for mount in $wemounted; do
+ /bin/umount.busybox $mount
+ done
+ fi
+ exec ${INIT}
+)
+cd ${UNION}
+pivot_root . ./${ROOTBACKUP}
+exec chroot . ${INIT}