1 files changed, 78 insertions, 0 deletions
diff --git a/archiso/mkusbimg b/archiso/mkusbimg
new file mode 100755
index 0000000..727bb80
--- /dev/null
+++ b/archiso/mkusbimg
@@ -0,0 +1,78 @@
+#!/bin/bash
+#
+#    mkusbimg - creates a bootable disk image
+#    Copyright (C) 2008  Simo Leone <simo@archlinux.org>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# usage(exitvalue)
+# outputs a usage message and exits with value
+APPNAME=$(basename "${0}")
+usage()
+{
+    echo "usage: ${APPNAME} <imageroot> <imagefile>"
+    exit $1
+}
+
+##################################################
+
+if [ $# -ne 2 ]; then
+    usage 1
+fi
+
+DISKIMG="${2}"
+IMGROOT="${1}"
+TMPDIR=$(mktemp -d)
+FSIMG=$(mktemp)
+
+# ext2 overhead's upper bound is 6%
+# empirically tested up to 1GB
+rootsize=$(du -bs ${IMGROOT}|cut -f1)
+IMGSZ=$(( (${rootsize}*106)/100/512 + 1)) # image size in sectors
+
+# create the filesystem image file
+dd if=/dev/zero of="$FSIMG" bs=512 count="$IMGSZ"
+
+# create a filesystem on the image
+mke2fs -m 0 -F "$FSIMG"
+
+# mount the filesystem and copy data
+mount -o loop "$FSIMG" "$TMPDIR"
+cp -a "$IMGROOT"/* "$TMPDIR"
+
+# unmount filesystem
+umount "$TMPDIR"
+
+# add sectors 0-62, then glue together
+dd if=/dev/zero of="$DISKIMG" bs=512 count=63
+cat "$FSIMG" >> "$DISKIMG"
+
+# create a partition table
+# if this looks like voodoo, it's because it is
+sfdisk -uS -f "$DISKIMG" << EOF
+63,$IMGSZ,83,*
+0,0,00
+0,0,00
+0,0,00
+EOF
+
+# install grub on the image
+grub --no-floppy --batch << EOF
+device (hd0) $DISKIMG
+root (hd0,0)
+setup (hd0)
+EOF
+
+# all done :)
+rm -fr "$TMPDIR" "$FSIMG"