-#!/bin/sh
+#! /bin/bash
-# casper-snapshot - utility to do Debian Live systems snapshots
+# casper-snapshot - utility to manage Debian Live systems snapshots
#
-# This program mount a /tmpfs under ~/Desktop and save the /cow
-# filesystem in it for reusing in another session.
+# This program mount a device (fallback to /tmpfs under /mnt/snapshot
+# and save the /cow (or a different dir) filesystem in it for reusing
+# in another casper session. Look at manpage for more info.
#
# Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>
#
# 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}`"
+PROGRAM="`basename $0`"
VERSION=0.0.1
+
# Source casper conf
if [ -e /etc/casper.conf ]; then
. /etc/casper.conf
else
- USERNAME=`cat /etc/passwd | grep "999" | cut -f1 -d ':'`
+ USERNAME=$(cat /etc/passwd | grep "999" | cut -f1 -d ':')
+ HOSTNAME=$(hostname)
+ BUILD_SYSTEM="Debian"
+fi
+
+export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM
+
+# Source helper functions
+helpers="/usr/share/initramfs-tools/scripts/casper-helpers"
+if [ -e "${helpers}" ]; then
+ . "${helpers}"
+else
+ echo "Error: I cannot found helper functions \"${helpers}\"."
+ exit 1
fi
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
+. /lib/lsb/init-functions
+
+MOUNTP=""
+COW=""
+DEV=""
+DEST=""
+TYPE=""
+DESKTOP_LINK=""
+
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} [-c|--cow DIRECTORY] [-d|--device DEVICE] [-o|--output FILE] [-t|--type TYPE]"
+ echo "Usage: ${PROGRAM} [-r|--resync-string STRING]"
echo "Usage: ${PROGRAM} [-h|--help]"
echo "Usage: ${PROGRAM} [-u|--usage]"
echo "Usage: ${PROGRAM} [-v|--version]"
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 " -d, --device: specifies the output snapshot device (default: none)."
echo " -o, --output: specifies the output image file (default: $type dependent)."
- echo " -t,--type: specifies the snapshot type between \'squashfs\', \'ext2\' or \'cpio\'.gz archive (default: cpio)"
+ echo " -r, --resync-string: internally used to resync previous made snapshots."
+ echo " -t, --type: specifies the snapshot type between \"squashfs\", \"ext2\" or \"cpio\".gz archive (default: cpio)"
+ echo -e "\nLook at casper-snapshot(1) man page for more information."
exit 0
}
{
case "${TYPE}" in
squashfs)
- mksquashfs "${COW}" "${DEST}" || exit 1
+ echo "./tmp/exclude_list" > /tmp/exclude_list
+ ( cd "${COW}" && find . -name '*.wh.*' >> /tmp/exclude_list )
+ mksquashfs "${COW}" "${DEST}" -ef /tmp/exclude_list || exit 1
+ rm /tmp/exclude_list
;;
cpio)
- (cd "${COW}" && find . | cpio --quiet -o -H newc | gzip -9 > "${DEST}") || exit 1
+ ( cd "${COW}" && find . -path '*.wh.*' -prune -o -print0 | cpio --quiet -o0 -H newc | gzip -9c > "${DEST}" ) || exit 1
;;
ext2)
DU_DIM="`du -ks ${COW} | cut -f1`"
esac
}
-Lastline()
-{
- while read lines ; do
- line=${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}`"
+ dir1="`Base_path $1`"
+ dir2="`Base_path $2`"
if [ "${dir1}" == "${dir2}" ]; then
return 0
else
Parse_args ()
{
# Parse command line
- ARGUMENTS="`getopt --longoptions cow:,destination:,output:,type:,help,usage,version --name=${PROGRAM} --options c:d:o:t:,h,u,v --shell sh -- ${@}`"
+ ARGS="$1"
+ ARGUMENTS="`getopt --longoptions cow:,device:,output,resync-string:,type:,help,usage,version --name=${PROGRAM} --options c:d:o:t:r:,h,u,v --shell sh -- ${ARGS}`"
- if [ "${?}" != "0" ]; then
+ if [ "$?" != "0" ]; then
echo "Terminating." >&2
exit 1
fi
eval set -- "${ARGUMENTS}"
while true; do
- case "${1}" in
+ case "$1" in
-c|--cow)
- SNAP_COW="${2}"; shift 2 ;;
- -d|--destination)
- SNAP_DEST="${2}"; shift 2 ;;
+ SNAP_COW="$2"; shift 2 ;;
+ -d|--device)
+ SNAP_DEV="$2"; shift 2 ;;
-o|--output)
- SNAP_OUTPUT="${2}"; shift 2 ;;
+ SNAP_OUTPUT="$2"; shift 2 ;;
-t|--type)
- SNAP_TYPE="${2}"; shift 2 ;;
+ SNAP_TYPE="$2"; shift 2 ;;
+ -r|--resync-string)
+ SNAP_RSTRING="$2"; break ;;
-h|--help)
Help; shift ;;
-u|--usage)
done
}
+Mount_device ()
+{
+ dev="$1"
+
+ if [ ! -d "${MOUNTP}" ]; then
+ mkdir -p "${MOUNTP}"
+ fi
+
+ if [ -z "${dev}" ]; then
+ # create a temp
+ mount -t tmpfs -o rw tmpfs "${MOUNTP}"
+ if [ ! -L /home/$USERNAME/Desktop/casper-snapshot ]; then
+ ln -s "${MOUNTP}" /home/$USERNAME/Desktop/casper-snapshot
+ fi
+ else
+ if [ -b "${dev}" ] ; then
+ try_mount "${dev}" "${MOUNTP}" rw
+ fi
+ fi
+}
+
Defaults ()
{
- DEF_COW="/cow"
+ MOUNTP="/mnt/casper-snapshot"
+ COW="/cow"
+ DEV=""
+ DEST="${MOUNTP}/casper-sn.cpio.gz"
+ TYPE="cpio"
+ DESKTOP_LINK=/home/$USERNAME/Desktop/casper-snapshot
- # Bad options handling
- if [ -z "${SNAP_COW}" ]; then
- COW="${DEF_COW}"
+ if [ -n "${SNAP_RSTRING}" ]; then
+ COW=$(echo "${SNAP_RSTRING}" | cut -f1 -d ':')
+ DEV=$(echo "${SNAP_RSTRING}" | cut -f2 -d ':')
+ DEST=$(echo "${SNAP_RSTRING}" | cut -f3 -d ':')
+
+ case "${DEST}" in
+ *.cpio.gz)
+ TYPE="cpio" ;;
+ *.squashfs)
+ TYPE="squashfs" ;;
+ "")
+ TYPE="ext2" ;;
+ *.ext2)
+ TYPE="ext2" ;;
+ *)
+ Usage "Unregognized String" ;;
+ esac
else
- COW="${SNAP_COW}"
+ DEF_COW="/cow"
+ # Bad options handling
+ if [ -z "${SNAP_COW}" ]; then
+ COW="${DEF_COW}"
+ else
+ COW="${SNAP_COW}"
+ fi
+
+ case "${SNAP_TYPE}" in
+ "cpio"|"squashfs"|"ext2")
+ TYPE="${SNAP_TYPE}"
+ ;;
+ "")
+ TYPE="cpio" ;;
+ *)
+ Usage "Error: unrecognized snapshot type"
+ ;;
+ esac
+ #if [ -d
+ #if Is_same_mount
fi
+
+ # check vars
if [ ! -d "${COW}" ]; then
- Usage "Error: ${COW} is not a directory\nMaybe you booted with \"hide-cow\" as kernel parameter?"
+ Usage "Error: ${COW} is not a directory"
fi
- case "${SNAP_TYPE}" in
- "cpio"|"squashfs"|"ext2")
- TYPE="${SNAP_TYPE}"
- ;;
- "")
- TYPE="cpio" ;;
- *)
- Usage "Error: unrecognized snapshot type"
- ;;
- esac
+ Mount_device $DEV
+
+}
+
+Clean ()
+{
+ if [ -n "$DEV" ]; then
+ umount "${MOUNTP}"
+ rmdir "${MOUNTP}"
+ rm
+ fi
}
Main ()
{
- Parse_args "${@}"
+ Parse_args "$@"
Defaults
Do_snapshot
+ Clean
}
-Main "${@}"
+Main "$@"
projects / live-boot-grml.git / blobdiff