diff options
Diffstat (limited to 'bin/casper-snapshot')
| -rw-r--r-- | bin/casper-snapshot | 165 |
1 files changed, 112 insertions, 53 deletions
diff --git a/bin/casper-snapshot b/bin/casper-snapshot index f90e563..d2cb9e8 100644 --- a/bin/casper-snapshot +++ b/bin/casper-snapshot @@ -1,9 +1,10 @@ -#!/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> # @@ -27,18 +28,45 @@ 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 + +# Some defaults: +MOUNTP="/mnt/casper-snapshot" +COW="/cow" +DEV="" +DEST="${MOUNTP}/casper-sn.cpio.gz" +TYPE="cpio" +DESKTOP_LINK=/home/$USERNAME/Desktop/casper-snapshot + 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]" @@ -66,7 +94,9 @@ Help () 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: $type dependent)." + echo " -r, --resync-string: internally used to resync previous made snapshots." echo " -t,--type: specifies the snapshot type between \'squashfs\', \'ext2\' or \'cpio\'.gz archive (default: cpio)" + echo -e "\nLook at casper-snapshot(1) man page for more information." exit 0 } @@ -121,31 +151,6 @@ Do_snapshot () esac } -Lastline() -{ - while read lines ; do - line=${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 ${1}`" @@ -174,12 +179,14 @@ Parse_args () case "${1}" in -c|--cow) SNAP_COW="${2}"; shift 2 ;; - -d|--destination) - SNAP_DEST="${2}"; shift 2 ;; + -d|--device) + SNAP_DEV="${2}"; shift 2 ;; -o|--output) SNAP_OUTPUT="${2}"; shift 2 ;; -t|--type) SNAP_TYPE="${2}"; shift 2 ;; + -r|--resync-string) + SNAP_RSTRING="${2}"; break ;; -h|--help) Help; shift ;; -u|--usage) @@ -194,34 +201,85 @@ Parse_args () done } -Defaults () +Mount_device () { - DEF_COW="/cow" + dev="${1}" + + if [ ! -d "${MOUNTP}" ]; then + mkdir -p "${MOUNTP}" + fi + + if [ -n "${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}" "${MOUNTP}" rw + fi + fi +} - # Bad options handling - if [ -z "${SNAP_COW}" ]; then - COW="${DEF_COW}" +Defaults () +{ + if [ -n "${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 "${DEST}" in + *.cpio.gz|*.cpz|*.gz) + TYPE="cpio" ;; + *.squashfs|*.squ}) + TYPE="squashfs" ;; + "") + TYPE="ext2" ;; + *.ext2|*.ext) + TYPE="ext2" ;; + *) + Usage "Unregognized String" ;; + esac else - COW="${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 + + Mount_device $DEV + DEST="${MOUNTP}/${DEST}" + + # check vars if [ ! -d "${COW}" ]; then Usage "Error: ${COW} is not a directory" fi +} - case "${SNAP_TYPE}" in - "cpio"|"squashfs"|"ext2") - TYPE="${SNAP_TYPE}" - ;; - "") - TYPE="cpio" ;; - *) - Usage "Error: unrecognized snapshot type" - ;; - esac - - #if [ -d - #if Is_same_mount - +Clean () +{ + if [ -n "$DEV" ]; then + umount "${MOUNTP}" + rmdir "${MOUNTP}" + rm + fi } Main () @@ -229,6 +287,7 @@ Main () Parse_args "${@}" Defaults Do_snapshot + Clean } Main "${@}" |