update scripts and README

- removed extra dd-variation scripts
- updated script for general usage (src/dest as arguments)
- adjusted script to support modifying new image
  - moves /home/* from part1 to part2
  - adds /home entry to /etc/fstab
- moved manut's update-home.sh to "extra" directory
  (may still be in use? until a general replacement exists)

Signed-off-by: John Ogness <john.ogness@linutronix.de>

1 files changed, 99 insertions, 0 deletions

diff --git a/lx-trainer-vm/dd-multi.sh b/lx-trainer-vm/dd-multi.sh
new file mode 100755
index 0000000..b715681
--- /dev/null
+++ b/lx-trainer-vm/dd-multi.sh
@@ -0,0 +1,99 @@
+#!/bin/sh
+set -e
+
+usage_exit()
+{
+	echo
+	echo "usage: $0 src dest [dest]..."
+	echo
+	echo "example: copying image to devs sde, sdf, sdg"
+	echo "$0 lx-trainer.img /dev/sde /dev/sdf /dev/sdg"
+	echo
+	exit 1
+}
+
+# minimum 2 arguments
+if [ $# -lt 2 ]; then
+	echo "error: invalid arguments"
+	usage_exit
+fi
+
+SRC="$1"
+shift
+DESTS="$@"
+
+# source must be file or block device
+if [ ! -f "$SRC" -a ! -b "$SRC" ]; then
+	echo "error: invalid src"
+	usage_exit
+fi
+
+# destination must be block device
+for dest in $DESTS; do
+	if [ ! -b $dest ]; then
+		echo "error: invalid dest: $dest"
+		usage_exit
+	fi
+done
+
+# check if we are root (but keep going)
+if [ `id -u` -ne 0 ]; then
+	echo "warning: not root, may not work"
+fi
+
+# delete mbr
+for dest in $DESTS; do
+	dd if=/dev/zero of=$dest bs=1M count=1 &
+done
+wait
+
+partprobe
+
+# efficiently copy source to all destinations
+cat $SRC | tee $DESTS > /dev/null
+
+partprobe
+
+# add 2nd partition
+for dest in $DESTS; do
+	/bin/echo -e "n\np\n\n\n\nw" | fdisk $dest &
+done
+wait
+
+partprobe
+
+# create ext4 on 2nd partition
+for dest in $DESTS; do
+	mkfs.ext4 -L lxhome ${dest}2 &
+done
+wait
+
+# setup temp directory for mountpoints
+TMP_ROOT="/tmp/dd-multi-`date +%s`.$$"
+rm -rf $TMP_ROOT
+mkdir -p $TMP_ROOT
+echo "using temp directory $TMP_ROOT"
+
+for dest in $DESTS; do
+	# create mountpoints
+	mkdir -p ${TMP_ROOT}${dest}1
+	mkdir -p ${TMP_ROOT}${dest}2
+
+	# mount partitions
+	mount ${dest}1 ${TMP_ROOT}${dest}1
+	mount ${dest}2 ${TMP_ROOT}${dest}2
+
+	# move home directories to 2nd partition
+	mv ${TMP_ROOT}${dest}1/home/* ${TMP_ROOT}${dest}2/
+
+	# setup 2nd partition to be mounted as /home
+	echo 'LABEL=lxhome /home ext4 defaults 0 0' | \
+		tee -a ${TMP_ROOT}${dest}1/etc/fstab
+
+	# unmount partitions
+	umount ${TMP_ROOT}${dest}1
+	umount ${TMP_ROOT}${dest}2
+done
+
+# cleanup temp directory
+rm -rf $TMP_ROOT