1 files changed, 80 insertions, 0 deletions
diff --git a/recipes-images/images/files/library/genext3fs.sh b/recipes-images/images/files/library/genext3fs.sh
new file mode 100755
index 0000000..ffcf060
--- /dev/null
+++ b/recipes-images/images/files/library/genext3fs.sh
@@ -0,0 +1,80 @@
+#!/bin/sh
+#creates a file containing a ext3 binary blob of the content of the ../rootfs folder
+
+# sometimes we need the binary echo, not the shell builtin
+ECHO=`which echo`
+
+MOUNTPOINT="mnt/trdx-rootfs"
+
+Usage()
+{
+	echo "creates a file containing a ext3 binary blob. Output file name taken from command line"
+	echo "Usage: genext3fs.sh [OPTION]... dest_file_name"
+	echo "-h : Prints this message"
+	echo "-b : Sets the partition size in MBytes, default 256"
+	echo "-d : Selects the directory which contains the partition content, default ../rootfs"
+	echo ""
+}
+
+PARTITIONSIZE=256
+SRCPATH=../rootfs
+
+while getopts "b:d:h" Option ; do
+	case $Option in
+		h) Usage
+			# Exit if only usage (-h) was specfied.
+			if [[ "$#" -eq "1" ]] ; then
+				exit 10
+			fi
+			exit 0
+			;;
+		b) PARTITIONSIZE=$OPTARG
+			;;
+		d) SRCPATH=$OPTARG
+			;;
+	esac
+done
+#adjust the commandline arg for the now used options
+shift $(($OPTIND - 1))
+
+#create the file used for the loopbackdevice and format it for ext3
+#answer y to "is not a block special device"
+dd if=/dev/zero of=$@ bs=1024k count=$PARTITIONSIZE
+mkfs.ext3 -F -L rootfs $@
+#disable fsck checks based on mount count or time interval
+tune2fs -c 0 -i 0 $@
+
+#prepare mountpoint for the loopdevice 
+sudo mkdir -p $MOUNTPOINT
+sudo umount $MOUNTPOINT &> /dev/null
+sudo rm -rf $MOUNTPOINT/*
+#mount the file as a loopdevice 
+#there seems to be a race between mkfs.ext3 not yet finished and mount already trying to mount, so try until it works
+MOUNTED=0
+while [ "$MOUNTED" -eq  "0" ] ; do
+	sync
+	sleep 1
+	sudo mount $@ $MOUNTPOINT/ -o loop -t ext3
+	MOUNTED=`mount | grep -c "$MOUNTPOINT"`
+done
+#extract rootfs into the file
+sudo cp -rpP $SRCPATH/* $MOUNTPOINT
+if [ "$?" -ne "0" ] ; then
+	$ECHO -e "\033[1mCopying the rootfs failed.\033[0m"
+	echo "Check for error messages from cp"
+	sudo rm $@
+	exit 1
+fi
+
+#unmount again
+sudo umount $MOUNTPOINT
+
+#if the mounting was unsuccesful all rootfs data now still is in MOUNTPOINT, and $@ contains an empty fs
+#delete $@ in that case to fail early
+sync
+FAILED=`ls $MOUNTPOINT | wc -l`
+if [ "$FAILED" -ne "0" ] ; then
+	$ECHO -e "\033[1mMounting the loopdevice $@ failed.\033[0m"
+	sudo rm $@
+	exit 1
+fi