-#! /bin/bash
+#!/bin/sh
# live-snapshot - utility to manage Debian Live systems snapshots
#
# This program mount a device (fallback to /tmpfs under /mnt/snapshot
-# and save the /cow (or a different dir) filesystem in it for reusing
+# and save the /live/cow (or a different dir) filesystem in it for reusing
# in another live-initramfs session. Look at manpage for more info.
#
# Copyright (C) 2006 Marco Amadori <marco.amadori@gmail.com>
# 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.
+# can be found in /usr/share/common-licenses/GPL-2 file.
-PROGRAM="`basename $0`"
+PROGRAM="$(basename $0)"
VERSION=0.0.1
-
# Source live conf
-if [ -e /etc/live.conf ]; then
+if [ -e /etc/live.conf ]
+then
. /etc/live.conf
else
USERNAME=$(cat /etc/passwd | grep "999" | cut -f1 -d ':')
HOSTNAME=$(hostname)
- BUILD_SYSTEM="Debian"
fi
-export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM
+export USERNAME USERFULLNAME HOSTNAME
# Source helper functions
helpers="/usr/share/initramfs-tools/scripts/live-helpers"
-if [ -e "${helpers}" ]; then
+
+if [ -e "${helpers}" ]
+then
. "${helpers}"
else
echo "Error: I cannot found helper functions \"${helpers}\"."
Usage ()
{
MESSAGE=${1}
+
Header
+
echo
echo "Try \"${PROGRAM} --help\" for more information."
- if [ ! -z "${MESSAGE}" ]; then
- echo -e "${MESSAGE}"
+
+ if [ ! -z "${MESSAGE}" ]
+ then
+ /bin/echo -e "${MESSAGE}"
exit 1
else
exit 0
Help ()
{
Header
+
echo
echo "Options:"
- echo " -c, --cow: specifies the copy on write directory (default: /cow)."
+ echo " -c, --cow: specifies the copy on write directory (default: /live/cow)."
echo " -d, --device: specifies the output snapshot device (default: none)."
- echo " -o, --output: specifies the output image file (default: $type dependent)."
- 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 live-snapshot(1) man page for more information."
+ echo " -o, --output: specifies the output image file (default: ${type} dependent)."
+ echo " -r, --resync-string: internally used to resync previous made snapshots."
+ echo " -t, --type: specifies the snapshot type between \"squashfs\", \"ext2\", \"ext3\" or \"cpio\".gz archive (default: cpio)"
+ /bin/echo -e "\nLook at live-snapshot(1) man page for more information."
+
exit 0
}
echo "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA"
echo
echo "On Debian systems, the complete text of the GNU General Public License"
- echo "can be found in /usr/share/common-licenses/GPL file."
+ echo "can be found in /usr/share/common-licenses/GPL-2 file."
echo
echo "Homepage: <http://debian-live.alioth.debian.org/>"
+
exit 0
}
mksquashfs "${COW}" "${DEST}" -ef /tmp/exclude_list || exit 1
rm /tmp/exclude_list
;;
+
cpio)
( cd "${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`"
- REAL_DIM="`expr ${DU_DIM} + ${DU_DIM} / 20`" # Just 5% more to be sure, need something more sophistcated here...
+
+ ext2|ext3)
+ DU_DIM="$(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
Is_same_mount ()
{
- dir1="`Base_path $1`"
- dir2="`Base_path $2`"
- if [ "${dir1}" == "${dir2}" ]; then
+ dir1="$(Base_path ${1})"
+ dir2="$(Base_path ${2})"
+
+ if [ "${dir1}" = "${dir2}" ]
+ then
return 0
else
return 1
Parse_args ()
{
# Parse command line
- 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 -- ${ARGS}`"
+ ARGS="${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 "$1" in
+ while true
+ do
+ case "${1}" in
-c|--cow)
- SNAP_COW="$2"; shift 2 ;;
+ SNAP_COW="${2}"
+ shift 2
+ ;;
+
-d|--device)
- SNAP_DEV="$2"; shift 2 ;;
+ SNAP_DEV="${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="$2"; break ;;
+ SNAP_RSTRING="${2}"
+ break
+ ;;
+
-h|--help)
- Help; shift ;;
+ Help
+ ;;
+
-u|--usage)
- Usage ; shift ;;
+ Usage
+ ;;
+
-v|--version)
- Version; shift ;;
+ Version
+ ;;
+
--)
- shift; break ;;
+ shift
+ break
+ ;;
+
*)
echo "Internal error."; exit 1 ;;
+
esac
done
}
Mount_device ()
{
- dev="$1"
+ dev="${1}"
- if [ ! -d "${MOUNTP}" ]; then
+ if [ ! -d "${MOUNTP}" ]
+ then
mkdir -p "${MOUNTP}"
fi
- if [ -z "${dev}" ]; then
+ if [ -z "${dev}" ]
+ then
# create a temp
mount -t tmpfs -o rw tmpfs "${MOUNTP}"
- if [ ! -L /home/$USERNAME/Desktop/live-snapshot ]; then
- ln -s "${MOUNTP}" /home/$USERNAME/Desktop/live-snapshot
+
+ if [ ! -L /home/${USERNAME}/Desktop/live-snapshot ]
+ then
+ ln -s "${MOUNTP}" /home/${USERNAME}/Desktop/live-snapshot
fi
else
- if [ -b "${dev}" ] ; then
+ if [ -b "${dev}" ]
+ then
try_mount "${dev}" "${MOUNTP}" rw
fi
fi
Defaults ()
{
MOUNTP="/mnt/live-snapshot"
- COW="/cow"
+ COW="/live/cow"
DEV=""
DEST="${MOUNTP}/live-sn.cpio.gz"
TYPE="cpio"
- DESKTOP_LINK=/home/$USERNAME/Desktop/live-snapshot
+ DESKTOP_LINK=/home/${USERNAME}/Desktop/live-snapshot
- if [ -n "${SNAP_RSTRING}" ]; then
+ 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" ;;
+ TYPE="cpio"
+ ;;
+
*.squashfs)
- TYPE="squashfs" ;;
- "")
- TYPE="ext2" ;;
- *.ext2)
- TYPE="ext2" ;;
+ TYPE="squashfs"
+ ;;
+
+ ""|*.ext2|*.ext3)
+ TYPE="ext2"
+ ;;
+
*)
- Usage "Unregognized String" ;;
+ Usage "Unregognized String"
+ ;;
esac
else
- DEF_COW="/cow"
+ DEF_COW="/live/cow"
+
# Bad options handling
- if [ -z "${SNAP_COW}" ]; then
+ if [ -z "${SNAP_COW}" ]
+ then
COW="${DEF_COW}"
else
COW="${SNAP_COW}"
fi
case "${SNAP_TYPE}" in
- "cpio"|"squashfs"|"ext2")
+ "cpio"|"squashfs"|"ext2"|"ext3")
TYPE="${SNAP_TYPE}"
;;
+
"")
- TYPE="cpio" ;;
+ TYPE="cpio"
+ ;;
+
*)
Usage "Error: unrecognized snapshot type"
;;
esac
+
#if [ -d
#if Is_same_mount
fi
# check vars
- if [ ! -d "${COW}" ]; then
+ if [ ! -d "${COW}" ]
+ then
Usage "Error: ${COW} is not a directory"
fi
- Mount_device $DEV
-
+ Mount_device ${DEV}
}
Clean ()
{
- if [ -n "$DEV" ]; then
+ if [ -n "${DEV}" ]
+ then
umount "${MOUNTP}"
rmdir "${MOUNTP}"
#rm
Main ()
{
- Parse_args "$@"
+ Parse_args "${@}"
Defaults
Do_snapshot
Clean
}
-Main "$@"
+Main "${@}"
projects / live-boot-grml.git / blobdiff