changeset c45e8cb7f4ea in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=c45e8cb7f4ea
description:
Add the mkblankimage.sh utility to the utils directory.
diffstat:
1 file changed, 109 insertions(+)
util/mkblankimage.sh | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++
diffs (223 lines):
diff -r 88038cdbb9e1 -r c45e8cb7f4ea util/mkblankimage.sh
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/util/mkblankimage.sh Wed Dec 03 04:57:55 2008 -0800
@@ -0,0 +1,219 @@
+#!/bin/sh
+#
+# makeblankimage.sh
+# Make a blank M5 disk image
+#
+
+while getopts "m" OPT
+do
+ case "$OPT" in
+ m) MOUNT_IT=1
+ esac
+done
+
+DEBUG=0
+
+if [ $DEBUG -ne 0 ]; then
+ set -x -e
+ OUTPUT=""
+else
+ OUTPUT="> /dev/null 2>&1"
+fi
+
+abort() {
+ echo $@
+ exec /bin/false
+}
+
+find_prog() {
+ PROG_PATH=`which $1`
+ if [ $? -ne 0 ]; then
+ abort "Unable to find program $1, check your PATH variable"
+ fi
+ echo $PROG_PATH
+}
+
+run_priv() {
+ if [ "$HAVE_SUDO" = "y" ]; then
+ eval $SUDO $@ $OUTPUT
+ else
+ eval $@ $OUTPUT
+ fi
+
+ if [ $? -ne 0 ]; then
+ abort "Failed to run $@ as root"
+ fi
+}
+
+usage() {
+ abort "Usage: $0 [root-path to copy] [extra ownership commands ...]"
+}
+
+# Setup PATH to look in the sbins
+export PATH=$PATH:/sbin:/usr/sbin
+
+# Get all of the programs needed, or exit
+DD=`find_prog dd`
+SFDISK=`find_prog sfdisk`
+LOSETUP=`find_prog losetup`
+SUDO=`find_prog sudo`
+MKE2FS=`find_prog mke2fs`
+MKDIR=`find_prog mkdir`
+MOUNT=`find_prog mount`
+UMOUNT=`find_prog umount`
+WHOAMI=`find_prog whoami`
+CP=`find_prog cp`
+CHOWN=`find_prog chown`
+
+# Prompt for the root password, if needed
+CUR_USER=`$WHOAMI`
+
+if [ $# -ge 1 ]; then
+ if [ ! $MOUNT_IT ]; then
+ ROOT_PATH=$1
+
+ if [ ! -d $ROOT_PATH ]; then
+ usage
+ fi
+ else
+ ROOT_PATH=""
+ fi
+else
+ ROOT_PATH=""
+fi
+
+if [ ! "$CUR_USER" = "root" ]; then
+ echo -n "Do you have sudo access? [y/n] "
+ read HAVE_SUDO
+
+ if [ ! "$HAVE_SUDO" = "y" ]; then
+ abort "You must have sudo access or run this script as root"
+ fi
+fi
+
+echo -n "How large do you want this disk image (in MB): "
+read USER_SIZE_MB
+
+# size in bytes = SIZE_MB * 1024 * 1024
+# size in blocks = SIZE_BYTE / 512
+let BLK_SIZE=$USER_SIZE_MB*1024*2
+
+let MAX_LBA=16383*16*63
+
+if [ $BLK_SIZE -ge $MAX_LBA ]; then
+ CYLS=16383
+ HEADS=16
+ SECTORS=63
+else
+ # Set Sectors
+ if [ $BLK_SIZE -ge 63 ]; then
+ SECTORS=63
+ else
+ SECTORS=$BLK_SIZE
+ fi
+
+ # Set Heads
+ let HEAD_SIZE=$BLK_SIZE/$SECTORS
+
+ if [ $HEAD_SIZE -ge 16 ]; then
+ HEADS=16
+ else
+ HEADS=$BLK_SIZE
+ fi
+
+ # Set Cylinders
+ let SEC_HEAD=$SECTORS*$HEADS
+ let CYLS=$BLK_SIZE/$SEC_HEAD
+fi
+
+# Recalculate number of sectors
+let BLK_SIZE=$CYLS*$HEADS*$SECTORS
+
+# Get the name of the file and directory to build in
+echo -n "What directory would you like to build the image in? "
+read IMAGE_DIR
+
+if [ ! -d $IMAGE_DIR ]; then
+ abort "The directory $IMAGE_DIR does not exist"
+fi
+
+echo -n "What would you like to name the image? "
+read IMAGE_NAME
+
+IMAGE_FILE=$IMAGE_DIR/$IMAGE_NAME
+
+# DD the blank image
+echo
+echo "dd'ing the blank image (this make take a while)..."
+eval $DD if=/dev/zero of=$IMAGE_FILE bs=512 count=$BLK_SIZE $OUTPUT
+if [ $? -ne 0 ]; then
+ abort "Unable to create the blank image $IMAGE_NAME in $IMAGE_DIR"
+fi
+
+# losetup the image with no offset to do the fdisk
+echo
+echo "Binding the image and partitioning..."
+run_priv $LOSETUP /dev/loop0 $IMAGE_FILE
+if [ $? -ne 0 ]; then
+ abort "losetup to /dev/loop0 failed, make sure nothing is setup on loop0
(check by typing 'mount') "
+fi
+
+# fdisk the image
+run_priv $SFDISK --no-reread -D -C $CYLS -H $HEADS -S $SECTORS /dev/loop0 <<EOF
+0,
+;
+;
+;
+EOF
+
+# Un-losetup the image
+run_priv $LOSETUP -d /dev/loop0
+
+# Mount the image with an offset and make the filesystem
+echo
+echo "Remounting image and formatting..."
+let BASE_OFFSET=63*512
+
+run_priv $LOSETUP -o $BASE_OFFSET /dev/loop0 $IMAGE_FILE
+
+run_priv $MKE2FS /dev/loop0
+
+# If a root path was specified then copy the root path into the image
+if [ ! -z "$ROOT_PATH" ]; then
+ echo "Copying root from $ROOT_PATH to image file"
+
+ run_priv $MKDIR -p /tmp/mnt
+
+ run_priv $MOUNT /dev/loop0 /tmp/mnt
+
+ run_priv $CP -a $ROOT_PATH/* /tmp/mnt
+
+ run_priv $CHOWN -R root.root /tmp/mnt
+
+ # run extra permissions while disk is mounted
+ TOPDIR=`pwd`
+ cd /tmp/mnt
+ i=2
+ while [ $i -le $# ]; do
+ run_priv ${!i}
+ let i=i+1
+ done
+ cd $TOPDIR
+
+ run_priv $UMOUNT /tmp/mnt
+fi
+
+run_priv $LOSETUP -d /dev/loop0
+
+
+if [ $MOUNT_IT -eq 1 ]; then
+ run_priv mount -o loop,offset=$BASE_OFFSET $IMAGE_FILE /tmp/mnt
+else
+ echo
+ echo "Disk image creation complete."
+ echo "To mount the image, run the following commands:"
+ echo "# $MOUNT -o loop,offset=$BASE_OFFSET $IMAGE_FILE /mount/point"
+ echo
+ echo "And to unmount the image, run:"
+ echo "# $UMOUNT /mount/point"
+fi;
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