X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=bin%2Flive-snapshot;h=e508c2a08a671f8455b96f8951cea2563d924e80;hb=73be0f36a5ee85317b2b9e94a0781cab9320a5ee;hp=3f9c11c04dda25dc20a6193c8a33666b0f3a16a3;hpb=0a1b827c113b85f48bcd58e64ccd94d094b9bd8a;p=live-boot-grml.git diff --git a/bin/live-snapshot b/bin/live-snapshot index 3f9c11c..e508c2a 100755 --- a/bin/live-snapshot +++ b/bin/live-snapshot @@ -1,9 +1,9 @@ -#! /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 @@ -23,14 +23,14 @@ # 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 ':') @@ -42,7 +42,9 @@ export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM # 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}\"." @@ -74,10 +76,14 @@ Header () Usage () { MESSAGE=${1} + Header + echo echo "Try \"${PROGRAM} --help\" for more information." - if [ ! -z "${MESSAGE}" ]; then + + if [ ! -z "${MESSAGE}" ] + then echo -e "${MESSAGE}" exit 1 else @@ -88,14 +94,16 @@ Usage () 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 " -o, --output: specifies the output image file (default: ${type} dependent)." echo " -r, --resync-string: internally used to resync previous made snapshots." echo " -t, --type: specifies the snapshot type between \"squashfs\", \"ext2\", \"ext3\" or \"cpio\".gz archive (default: cpio)" echo -e "\nLook at live-snapshot(1) man page for more information." + exit 0 } @@ -120,9 +128,10 @@ Version () echo "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA" echo echo "On Debian systems, the complete text of the GNU General Public License" - echo "can be found in /usr/share/common-licenses/GPL file." + echo "can be found in /usr/share/common-licenses/GPL-2 file." echo echo "Homepage: " + exit 0 } @@ -135,14 +144,17 @@ Do_snapshot () mksquashfs "${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|ext3) - DU_DIM="`du -ks ${COW} | cut -f1`" - REAL_DIM="`expr ${DU_DIM} + ${DU_DIM} / 20`" # Just 5% more to be sure, need something more sophistcated here... + DU_DIM="$(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 @@ -152,9 +164,11 @@ Do_snapshot () 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 @@ -164,58 +178,90 @@ Is_same_mount () 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 @@ -224,33 +270,41 @@ Mount_device () 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|*.ext3) - 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}" @@ -260,28 +314,33 @@ Defaults () "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 "${MOUNTP}" #rm @@ -290,10 +349,10 @@ Clean () Main () { - Parse_args "$@" + Parse_args "${@}" Defaults Do_snapshot Clean } -Main "$@" +Main "${@}"