+#!/bin/sh
+
+# casper-snapshot - utility to do Debian Live systems snapshots
+#
+# This program mount a /tmpfs under ~/Desktop and save the /cow
+# filesystem in it for reusing in another session.
+#
+# Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>
+#
+# 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 2 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, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+# On Debian systems, the complete text of the GNU General Public License
+# can be found in /usr/share/common-licenses/GPL file.
+
+PROGRAM="`basename ${1}`"
+VERSION=0.0.1
+
+# Source casper conf
+if [ -e /etc/casper.conf ]; then
+ . /etc/casper.conf
+else
+ USERNAME=`cat /etc/passwd | grep "999" | cut -f1 -d ':'`
+fi
+
+Header ()
+{
+ echo "${PROGRAM} - utility to do Debian Live snapshots"
+ echo
+ echo "Usage: ${PROGRAM} [-c|--cow DIRECTORY] [-d|--dest DIRECTORY] [-o|--output FILE] [-t|--type TYPE]"
+ echo "Usage: ${PROGRAM} [-h|--help]"
+ echo "Usage: ${PROGRAM} [-u|--usage]"
+ echo "Usage: ${PROGRAM} [-v|--version]"
+}
+
+Usage ()
+{
+ MESSAGE=${1}
+ Header
+ echo
+ echo "Try \"${PROGRAM} --help\" for more information."
+ if [ ! -z "${MESSAGE}" ]; then
+ echo -e "${MESSAGE}"
+ exit 1
+ else
+ exit 0
+ fi
+}
+
+Help ()
+{
+ Header
+ echo
+ echo "Options:"
+ echo " -c, --cow: specifies the copy on write directory (default: /cow)."
+ echo " -d, --destination: specifies the output snapshot directory (default: /home/\$USERNAME/Desktop/casper-snapshot)."
+ echo " -o, --output: specifies the output image file (default: $type dependent)."
+ echo " -t,--type: specifies the snapshot type between \'squashfs\', \'ext2\' or \'cpio\'.gz archive (default: cpio)"
+ exit 0
+}
+
+Version ()
+{
+ echo "${PROGRAM}, version ${VERSION}"
+ echo
+ echo "Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>"
+ echo
+ echo "This program is free software; you can redistribute it and/or modify"
+ echo "it under the terms of the GNU General Public License as published by"
+ echo "the Free Software Foundation; either version 2 of the License, or"
+ echo "(at your option) any later version."
+ echo
+ echo "This program is distributed in the hope that it will be useful,"
+ echo "but WITHOUT ANY WARRANTY; without even the implied warranty of"
+ echo "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the"
+ echo "GNU General Public License for more details."
+ echo
+ echo "You should have received a copy of the GNU General Public License"
+ echo "along with this program; if not, write to the Free Software"
+ echo "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA"
+ echo
+ echo "On Debian systems, the complete text of the GNU General Public License"
+ echo "can be found in /usr/share/common-licenses/GPL file."
+ echo
+ echo "Homepage: <http://live.debian.net/>"
+ exit 0
+}
+
+Do_snapshot ()
+{
+ case "${TYPE}" in
+ squashfs)
+ mksquashfs "${COW}" "${DEST}" || exit 1
+ ;;
+ cpio)
+ (cd "${COW}" && find . | cpio --quiet -o -H newc | gzip -9 > "${DEST}") || exit 1
+ ;;
+ ext2)
+ DU_DIM="`du -ks ${COW} | cut -f1`"
+ REAL_DIM="`expr ${DU_DIM} + ${DU_DIM} / 20`" # Just 5% more to be sure, need something more sophistcated here...
+ genext2fs --size-in-blocks=${REAL_DIM} --reserved-blocks=0 --root="${COW}" "${DEST}" || exit 1
+ ;;
+ *)
+ echo "Internal error."
+ exit 1
+ ;;
+ esac
+}
+
+Lastline()
+{
+ while read lines ; do
+ line=${lines}
+ done
+ echo "${line}"
+}
+
+Base_path ()
+{
+ testpath="${1}"
+ mounts="`awk '{print $2}' /proc/mounts`"
+ testpath="`realpath ${testpath}`"
+
+ while true ; do
+ if echo "${mounts}" | grep -qs "^${testpath}" ; then
+ set -- `echo "${mounts}" | grep "^${testpath}" | Lastline`
+ echo ${1}
+ break
+ else
+ testpath=`dirname $testpath`
+ fi
+ done
+}
+
+Is_same_mount ()
+{
+ dir1="`Base_path ${1}`"
+ dir2="`Base_path ${2}`"
+ if [ "${dir1}" == "${dir2}" ]; then
+ return 0
+ else
+ return 1
+ fi
+}
+
+Parse_args ()
+{
+ # Parse command line
+ ARGUMENTS="`getopt --longoptions cow:,destination:,output:,type:,help,usage,version --name=${PROGRAM} --options c:d:o:t:,h,u,v --shell sh -- ${@}`"
+
+ if [ "${?}" != "0" ]; then
+ echo "Terminating." >&2
+ exit 1
+ fi
+
+ eval set -- "${ARGUMENTS}"
+
+ while true; do
+ case "${1}" in
+ -c|--cow)
+ SNAP_COW="${2}"; shift 2 ;;
+ -d|--destination)
+ SNAP_DEST="${2}"; shift 2 ;;
+ -o|--output)
+ SNAP_OUTPUT="${2}"; shift 2 ;;
+ -t|--type)
+ SNAP_TYPE="${2}"; shift 2 ;;
+ -h|--help)
+ Help; shift ;;
+ -u|--usage)
+ Usage ; shift ;;
+ -v|--version)
+ Version; shift ;;
+ --)
+ shift; break ;;
+ *)
+ echo "Internal error."; exit 1 ;;
+ esac
+ done
+}
+
+Defaults ()
+{
+ DEF_COW="/cow"
+
+ # Bad options handling
+ if [ -z "${SNAP_COW}" ]; then
+ COW="${DEF_COW}"
+ else
+ COW="${SNAP_COW}"
+ fi
+ if [ ! -d "${COW}" ]; then
+ Usage "Error: ${COW} is not a directory\nMaybe you booted with \"hide-cow\" as kernel parameter?"
+ fi
+
+ case "${SNAP_TYPE}" in
+ "cpio"|"squashfs"|"ext2")
+ TYPE="${SNAP_TYPE}"
+ ;;
+ "")
+ TYPE="cpio" ;;
+ *)
+ Usage "Error: unrecognized snapshot type"
+ ;;
+ esac
+}
+
+Main ()
+{
+ Parse_args "${@}"
+ Defaults
+ Do_snapshot
+}
+
+Main "${@}"
projects / live-boot-grml.git / commitdiff