600 lines
18 KiB
Bash
Executable file
600 lines
18 KiB
Bash
Executable file
#!/bin/bash
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#
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# Copyright (c) 2008-2010 Damon Timm.
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# Copyright (c) 2010 Mario Santagiuliana.
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# Copyright (c) 2012 Marc Gallet.
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#
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# This program is free software: you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# MORE ABOUT THIS SCRIPT AVAILABLE IN THE README AND AT:
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#
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# http://zertrin.org/projects/duplicity-backup/ (for this version)
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# http://damontimm.com/code/dt-s3-backup (for the original programi by Damon Timm)
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#
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# Latest code available at:
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# http://github.com/zertrin/duplicity-backup
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#
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# ---------------------------------------------------------------------------- #
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# Default config file (don't forget to copy duplicity-backup.conf.example to
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# match that path)
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# NOTE: It can be useful not to edit this script at all to ease future updates
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# so the config file can be specified directly on the command line too
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# with the -c option.
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CONFIG="duplicity-backup.conf"
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##############################################################
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# Script Happens Below This Line - Shouldn't Require Editing #
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##############################################################
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usage(){
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echo "USAGE:
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`basename $0` [options]
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Options:
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-c, --config CONFIG_FILE specify the config file to use
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-b, --backup runs an incremental backup
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-f, --full forces a full backup
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-v, --verify verifies the backup
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--restore [PATH] restores the entire backup to [path]
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--restore-file [FILE_TO_RESTORE] [DESTINATION]
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restore a specific file
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-l, --list-current-files lists the files currently backed up in the archive
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-s, --collection-status show all the backup sets in the archive
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--backup-script automatically backup the script and secret key to
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the current working directory
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-n, --dry-run perform a trial run with no changes made
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CURRENT SCRIPT VARIABLES:
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========================
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DEST (backup destination) = ${DEST}
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INCLIST (directories included) = ${INCLIST[@]:0}
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EXCLIST (directories excluded) = ${EXCLIST[@]:0}
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ROOT (root directory of backup) = ${ROOT}
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LOGFILE (log file path) = ${LOGFILE}
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"
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}
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# Some expensive argument parsing that allows the script to
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# be insensitive to the order of appearance of the options
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# and to handle correctly option parameters that are optional
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while getopts ":c:bfvlsn-:" opt; do
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case $opt in
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# parse long options (a bit tricky because builtin getopts does not
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# manage long options and i don't want to impose GNU getopt dependancy)
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-)
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case "$OPTARG" in
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# --restore [restore dest]
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restore)
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COMMAND=$OPTARG
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# We try to find the optional value [restore dest]
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if [ ! -z "${!OPTIND:0:1}" -a ! "${!OPTIND:0:1}" = "-" ]; then
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RESTORE_DEST=${!OPTIND}
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OPTIND=$(( $OPTIND + 1 )) # we found it, move forward in arg parsing
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fi
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;;
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# --restore-file [file to restore] [restore dest]
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restore-file)
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COMMAND=$OPTARG
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# We try to find the first optional value [file to restore]
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if [ ! -z "${!OPTIND:0:1}" -a ! "${!OPTIND:0:1}" = "-" ]; then
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FILE_TO_RESTORE=${!OPTIND}
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OPTIND=$(( $OPTIND + 1 )) # we found it, move forward in arg parsing
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else
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continue # no value for the restore-file option, skip the rest
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fi
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# We try to find the second optional value [restore dest]
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if [ ! -z "${!OPTIND:0:1}" -a ! "${!OPTIND:0:1}" = "-" ]; then
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RESTORE_DEST=${!OPTIND}
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OPTIND=$(( $OPTIND + 1 )) # we found it, move forward in arg parsing
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fi
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;;
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config) # set the config file from the command line
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# We try to find the config file
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if [ ! -z "${!OPTIND:0:1}" -a ! "${!OPTIND:0:1}" = "-" ]; then
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CONFIG=${!OPTIND}
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OPTIND=$(( $OPTIND + 1 )) # we found it, move forward in arg parsing
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fi
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;;
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dry-run)
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ECHO=$(which echo)
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;;
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*)
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COMMAND=$OPTARG
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;;
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esac
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;;
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# here are parsed the short options
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c) CONFIG=$OPTARG;; # set the config file from the command line
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b) COMMAND="backup";;
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f) COMMAND="full";;
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v) COMMAND="verify";;
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l) COMMAND="list-current-files";;
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s) COMMAND="collection-status";;
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n) ECHO=$(which echo);; # dry run
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:)
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echo "Option -$OPTARG requires an argument." >&2
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COMMAND=""
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;;
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\?)
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echo "Invalid option: -$OPTARG" >&2
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COMMAND=""
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;;
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esac
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done
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# Read config file if specified
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if [ ! -z "$CONFIG" -a -f "$CONFIG" ];
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then
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. $CONFIG
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else
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echo "ERROR: can't find config file! (${CONFIG})" >&2
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usage
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exit 1
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fi
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SIGN_PASSPHRASE=$PASSPHRASE
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export AWS_ACCESS_KEY_ID
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export AWS_SECRET_ACCESS_KEY
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export PASSPHRASE
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export SIGN_PASSPHRASE
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LOGFILE="${LOGDIR}${LOG_FILE}"
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DUPLICITY="$(which duplicity)"
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S3CMD="$(which s3cmd)"
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# File to use as a lock. The lock is used to insure that only one instance of
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# the script is running at a time.
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LOCKFILE=${LOGDIR}backup.lock
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if [ "$ENCRYPTION" = "yes" ]; then
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if [ ! -z "$GPG_ENC_KEY" ] && [ ! -z "$GPG_SIGN_KEY" ]; then
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ENCRYPT="--encrypt-key=${GPG_ENC_KEY} --sign-key=${GPG_SIGN_KEY}"
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elif [ ! -z "$PASSPHRASE" ]; then
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ENCRYPT=""
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fi
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elif [ "$ENCRYPTION" = "no" ]; then
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ENCRYPT="--no-encryption"
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fi
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NO_S3CMD="WARNING: s3cmd is not installed, remote file \
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size information unavailable."
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NO_S3CMD_CFG="WARNING: s3cmd is not configured, run 's3cmd --configure' \
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in order to retrieve remote file size information. Remote file \
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size information unavailable."
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README_TXT="In case you've long forgotten, this is a backup script that you used to backup some files (most likely remotely at Amazon S3). In order to restore these files, you first need to import your GPG private(s) key(s) (if you haven't already). The key(s) is/are in this directory and the following command(s) should do the trick:\n\nIf you were using the same key for encryption and signature:\n gpg --allow-secret-key-import --import duplicity-backup-encryption-and-sign-secret.key.txt\nOr if you were using two separate keys for encryption and signature:\n gpg --allow-secret-key-import --import duplicity-backup-encryption-secret.key.txt\n gpg --allow-secret-key-import --import duplicity-backup-sign-secret.key.txt\n\nAfter your key(s) has/have been succesfully imported, you should be able to restore your files.\n\nGood luck!"
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CONFIG_VAR_MSG="Oops!! ${0} was unable to run!\nWe are missing one or more important variables in the configuration file.\nCheck your configuration because it appears that something has not been set yet."
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if [ ! -x "$DUPLICITY" ]; then
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echo "ERROR: duplicity not installed, that's gotta happen first!" >&2
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exit 1
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fi
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if [ "`echo ${DEST} | cut -c 1,2`" = "s3" ]; then
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DEST_IS_S3=true
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if [ ! -x "$S3CMD" ]; then
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echo $NO_S3CMD; S3CMD_AVAIL=false
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elif [ ! -f "${HOME}/.s3cfg" ]; then
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echo $NO_S3CMD_CFG; S3CMD_AVAIL=false
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else
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S3CMD_AVAIL=true
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fi
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else
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DEST_IS_S3=false
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fi
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check_variables ()
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{
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if [[ ${ROOT} = "" || ${DEST} = "" || ${INCLIST} = "" || \
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( ${ENCRYPTION} = "yes" && (${GPG_ENC_KEY} = "foobar_gpg_key" || \
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${GPG_SIGN_KEY} = "foobar_gpg_key" || \
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${PASSPHRASE} = "foobar_gpg_passphrase")) || \
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${LOGDIR} = "/home/foobar_user_name/logs/test2/" || \
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( ${DEST_IS_S3} = true && ${AWS_ACCESS_KEY_ID} = "foobar_aws_key_id" ) || \
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( ${DEST_IS_S3} = true && ${AWS_SECRET_ACCESS_KEY} = "foobar_aws_access_key" ) ]]; then
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echo -e ${CONFIG_VAR_MSG}
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exit 1
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fi
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}
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check_logdir()
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{
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if [ ! -d ${LOGDIR} ]; then
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echo "Attempting to create log directory ${LOGDIR} ..."
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if ! mkdir -p ${LOGDIR}; then
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echo "Log directory ${LOGDIR} could not be created by this user: ${USER}"
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echo "Aborting..."
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exit 1
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else
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echo "Directory ${LOGDIR} successfully created."
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fi
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elif [ ! -w ${LOGDIR} ]; then
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echo "Log directory ${LOGDIR} is not writeable by this user: ${USER}"
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echo "Aborting..."
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exit 1
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fi
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}
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email_logfile()
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{
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if [ $EMAIL_TO ]; then
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MAILCMD=$(which $MAIL)
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if [ ! -x "$MAILCMD" ]; then
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echo -e "Email couldn't be sent. ${MAIL} not available." >> ${LOGFILE}
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else
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EMAIL_SUBJECT=${EMAIL_SUBJECT:="duplicity-backup alert ${LOG_FILE}"}
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if [ "$MAIL" = "ssmtp" ]; then
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echo """Subject: ${EMAIL_SUBJECT}""" | cat - ${LOGFILE} | ${MAILCMD} -s ${EMAIL_TO}
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elif [ "$MAIL" = "mailx" ]; then
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EMAIL_FROM=${EMAIL_FROM:+"-r ${EMAIL_FROM}"}
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cat ${LOGFILE} | ${MAILCMD} -s """${EMAIL_SUBJECT}""" $EMAIL_FROM ${EMAIL_TO}
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fi
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echo -e "Email alert sent to ${EMAIL_TO} using ${MAIL}" >> ${LOGFILE}
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fi
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fi
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}
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get_lock()
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{
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echo "Attempting to acquire lock ${LOCKFILE}" >> ${LOGFILE}
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if ( set -o noclobber; echo "$$" > "${LOCKFILE}" ) 2> /dev/null; then
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# The lock succeeded. Create a signal handler to remove the lock file when the process terminates.
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trap 'EXITCODE=$?; echo "Removing lock. Exit code: ${EXITCODE}" >>${LOGFILE}; rm -f "${LOCKFILE}"' 0
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echo "successfully acquired lock." >> ${LOGFILE}
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else
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# Write lock acquisition errors to log file and stderr
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echo "lock failed, could not acquire ${LOCKFILE}" | tee -a ${LOGFILE} >&2
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echo "lock held by $(cat ${LOCKFILE})" | tee -a ${LOGFILE} >&2
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email_logfile
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exit 2
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fi
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}
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get_source_file_size()
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{
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echo "---------[ Source File Size Information ]---------" >> ${LOGFILE}
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# Patches to support spaces in paths-
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# Remove space as a field separator temporarily
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OLDIFS=$IFS
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IFS=$(echo -en "\t\n")
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for exclude in ${EXCLIST[@]}; do
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DUEXCLIST="${DUEXCLIST}${exclude}\n"
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done
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for include in ${INCLIST[@]}
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do
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echo -e '"'$DUEXCLIST'"' | \
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du -hs --exclude-from="-" ${include} | \
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awk '{ FS="\t"; $0=$0; print $1"\t"$2 }' \
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>> ${LOGFILE}
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done
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echo >> ${LOGFILE}
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# Restore IFS
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IFS=$OLDIFS
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}
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get_remote_file_size()
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{
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echo "------[ Destination File Size Information ]------" >> ${LOGFILE}
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dest_type=`echo ${DEST} | cut -c 1,2`
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case $dest_type in
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"fi")
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TMPDEST=`echo ${DEST} | cut -c 6-`
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SIZE=`du -hs ${TMPDEST} | awk '{print $1}'`
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;;
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"s3")
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if $S3CMD_AVAIL ; then
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TMPDEST=$(echo ${DEST} | cut -c 11-)
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SIZE=`s3cmd du -H s3://${TMPDEST} | awk '{print $1}'`
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else
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SIZE="s3cmd not installed."
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fi
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;;
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*)
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SIZE="Information on remote file size unavailable."
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;;
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esac
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echo "Current Remote Backup File Size: ${SIZE}" >> ${LOGFILE}
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echo >> ${LOGFILE}
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}
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include_exclude()
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{
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# Changes to handle spaces in directory names and filenames
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# and wrapping the files to include and exclude in quotes.
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OLDIFS=$IFS
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IFS=$(echo -en "\t\n")
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for include in ${INCLIST[@]}
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do
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TMP=" --include=""'"$include"'"
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INCLUDE=$INCLUDE$TMP
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done
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for exclude in ${EXCLIST[@]}
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do
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TMP=" --exclude ""'"$exclude"'"
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EXCLUDE=$EXCLUDE$TMP
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done
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EXCLUDEROOT="--exclude=**"
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# Restore IFS
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IFS=$OLDIFS
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}
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duplicity_cleanup()
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{
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echo "-----------[ Duplicity Cleanup ]-----------" >> ${LOGFILE}
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eval ${ECHO} ${DUPLICITY} ${CLEAN_UP_TYPE} ${CLEAN_UP_VARIABLE} ${STATIC_OPTIONS} --force \
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${ENCRYPT} \
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${DEST} >> ${LOGFILE}
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echo >> ${LOGFILE}
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}
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duplicity_backup()
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{
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eval ${ECHO} ${DUPLICITY} ${OPTION} ${VERBOSITY} ${STATIC_OPTIONS} \
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${ENCRYPT} \
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${EXCLUDE} \
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${INCLUDE} \
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${EXCLUDEROOT} \
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${ROOT} ${DEST} \
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>> ${LOGFILE}
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}
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setup_passphrase()
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{
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if [ ! -z "$GPG_ENC_KEY" -a ! -z "$GPG_SIGN_KEY" -a "$GPG_ENC_KEY" != "$GPG_SIGN_KEY" ]; then
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echo -n "Please provide the passphrase for decryption (GPG key 0x${GPG_ENC_KEY}): "
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builtin read -s ENCPASSPHRASE
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echo -ne "\n"
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PASSPHRASE=$ENCPASSPHRASE
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export PASSPHRASE
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fi
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}
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get_file_sizes()
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{
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get_source_file_size
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get_remote_file_size
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sed -i -e '/^--*$/d' ${LOGFILE}
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chown ${LOG_FILE_OWNER} ${LOGFILE}
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}
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backup_this_script()
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{
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if [ `echo ${0} | cut -c 1` = "." ]; then
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SCRIPTFILE=$(echo ${0} | cut -c 2-)
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SCRIPTPATH=$(pwd)${SCRIPTFILE}
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else
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SCRIPTPATH=$(which ${0})
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fi
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TMPDIR=duplicity-backup-`date +%Y-%m-%d`
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TMPFILENAME=${TMPDIR}.tar.gpg
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README=${TMPDIR}/README
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echo "You are backing up: "
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echo " 1. ${SCRIPTPATH}"
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if [ ! -z "$GPG_ENC_KEY" -a ! -z "$GPG_SIGN_KEY" ]; then
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if [ "$GPG_ENC_KEY" = "$GPG_SIGN_KEY" ]; then
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echo " 2. GPG Secret encryption and sign key: ${GPG_ENC_KEY}"
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else
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echo " 2. GPG Secret encryption key: ${GPG_ENC_KEY} and GPG secret sign key: ${GPG_SIGN_KEY}"
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fi
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else
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echo " 2. GPG Secret encryption and sign key: none (symmetric encryption)"
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fi
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if [ ! -z "$CONFIG" -a -f "$CONFIG" ];
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then
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echo " 3. Config file: ${CONFIG}"
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fi
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echo "Backup tarball will be encrypted and saved to: `pwd`/${TMPFILENAME}"
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echo
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echo ">> Are you sure you want to do that ('yes' to continue)?"
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read ANSWER
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if [ "$ANSWER" != "yes" ]; then
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echo "You said << ${ANSWER} >> so I am exiting now."
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exit 1
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fi
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mkdir -p ${TMPDIR}
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cp $SCRIPTPATH ${TMPDIR}/
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if [ ! -z "$CONFIG" -a -f "$CONFIG" ];
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then
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cp $CONFIG ${TMPDIR}/
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fi
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if [ ! -z "$GPG_ENC_KEY" -a ! -z "$GPG_SIGN_KEY" ]; then
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export GPG_TTY=`tty`
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if [ "$GPG_ENC_KEY" = "$GPG_SIGN_KEY" ]; then
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gpg -a --export-secret-keys ${GPG_ENC_KEY} > ${TMPDIR}/duplicity-backup-encryption-and-sign-secret.key.txt
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else
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gpg -a --export-secret-keys ${GPG_ENC_KEY} > ${TMPDIR}/duplicity-backup-encryption-secret.key.txt
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gpg -a --export-secret-keys ${GPG_SIGN_KEY} > ${TMPDIR}/duplicity-backup-sign-secret.key.txt
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fi
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fi
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echo -e ${README_TXT} > ${README}
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echo "Encrypting tarball, choose a password you'll remember..."
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tar c ${TMPDIR} | gpg -aco ${TMPFILENAME}
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rm -Rf ${TMPDIR}
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echo -e "\nIMPORTANT!!"
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echo ">> To restore these files, run the following (remember your password):"
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echo "gpg -d ${TMPFILENAME} | tar x"
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echo -e "\nYou may want to write the above down and save it with the file."
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}
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check_variables
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check_logdir
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echo -e "-------- START DUPLICITY-BACKUP SCRIPT --------\n" >> ${LOGFILE}
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get_lock
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case "$COMMAND" in
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"backup-script")
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backup_this_script
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exit
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;;
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"full")
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OPTION="full"
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include_exclude
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duplicity_backup
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duplicity_cleanup
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get_file_sizes
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;;
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"verify")
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OLDROOT=${ROOT}
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ROOT=${DEST}
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DEST=${OLDROOT}
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OPTION="verify"
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echo -e "-------[ Verifying Source & Destination ]-------\n" >> ${LOGFILE}
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include_exclude
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setup_passphrase
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echo -e "Attempting to verify now ..."
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duplicity_backup
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OLDROOT=${ROOT}
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ROOT=${DEST}
|
|
DEST=${OLDROOT}
|
|
|
|
get_file_sizes
|
|
|
|
echo -e "Verify complete. Check the log file for results:\n>> ${LOGFILE}"
|
|
;;
|
|
|
|
"restore")
|
|
ROOT=$DEST
|
|
OPTION="restore"
|
|
|
|
if [[ ! "$RESTORE_DEST" ]]; then
|
|
echo "Please provide a destination path (eg, /home/user/dir):"
|
|
read -e NEWDESTINATION
|
|
DEST=$NEWDESTINATION
|
|
echo ">> You will restore from ${ROOT} to ${DEST}"
|
|
echo "Are you sure you want to do that ('yes' to continue)?"
|
|
read ANSWER
|
|
if [[ "$ANSWER" != "yes" ]]; then
|
|
echo "You said << ${ANSWER} >> so I am exiting now."
|
|
echo -e "User aborted restore process ...\n" >> ${LOGFILE}
|
|
exit 1
|
|
fi
|
|
else
|
|
DEST=$RESTORE_DEST
|
|
fi
|
|
|
|
setup_passphrase
|
|
echo "Attempting to restore now ..."
|
|
duplicity_backup
|
|
;;
|
|
|
|
"restore-file")
|
|
ROOT=$DEST
|
|
INCLUDE=
|
|
EXCLUDE=
|
|
EXLUDEROOT=
|
|
OPTION=
|
|
|
|
if [[ ! "$FILE_TO_RESTORE" ]]; then
|
|
echo "Which file do you want to restore (eg, mail/letter.txt):"
|
|
read -e FILE_TO_RESTORE
|
|
echo
|
|
fi
|
|
|
|
if [[ "$RESTORE_DEST" ]]; then
|
|
DEST=$RESTORE_DEST
|
|
else
|
|
DEST=$(basename $FILE_TO_RESTORE)
|
|
fi
|
|
|
|
echo -e "YOU ARE ABOUT TO..."
|
|
echo -e ">> RESTORE: $FILE_TO_RESTORE"
|
|
echo -e ">> TO: ${DEST}"
|
|
echo -e "\nAre you sure you want to do that ('yes' to continue)?"
|
|
read ANSWER
|
|
if [ "$ANSWER" != "yes" ]; then
|
|
echo "You said << ${ANSWER} >> so I am exiting now."
|
|
echo -e "-------- END --------\n" >> ${LOGFILE}
|
|
exit 1
|
|
fi
|
|
|
|
FILE_TO_RESTORE="'"$FILE_TO_RESTORE"'"
|
|
DEST="'"$DEST"'"
|
|
|
|
setup_passphrase
|
|
echo "Restoring now ..."
|
|
#use INCLUDE variable without create another one
|
|
INCLUDE="--file-to-restore ${FILE_TO_RESTORE}"
|
|
duplicity_backup
|
|
;;
|
|
|
|
"list-current-files")
|
|
OPTION="list-current-files"
|
|
${DUPLICITY} ${OPTION} ${VERBOSITY} ${STATIC_OPTIONS} \
|
|
$ENCRYPT \
|
|
${DEST}
|
|
echo -e "-------- END --------\n" >> ${LOGFILE}
|
|
;;
|
|
|
|
"collection-status")
|
|
OPTION="collection-status"
|
|
${DUPLICITY} ${OPTION} ${VERBOSITY} ${STATIC_OPTIONS} \
|
|
$ENCRYPT \
|
|
${DEST}
|
|
echo -e "-------- END --------\n" >> ${LOGFILE}
|
|
;;
|
|
|
|
"backup")
|
|
include_exclude
|
|
duplicity_backup
|
|
duplicity_cleanup
|
|
get_file_sizes
|
|
;;
|
|
|
|
*)
|
|
echo -e "[Only show `basename $0` usage options]\n" >> ${LOGFILE}
|
|
usage
|
|
;;
|
|
esac
|
|
|
|
echo -e "-------- END DUPLICITY-BACKUP SCRIPT --------\n" >> ${LOGFILE}
|
|
|
|
email_logfile
|
|
|
|
if [ ${ECHO} ]; then
|
|
echo "TEST RUN ONLY: Check the logfile for command output."
|
|
fi
|
|
|
|
unset AWS_ACCESS_KEY_ID
|
|
unset AWS_SECRET_ACCESS_KEY
|
|
unset PASSPHRASE
|
|
unset SIGN_PASSPHRASE
|
|
|
|
# vim: set tabstop=2 shiftwidth=2 sts=2 autoindent smartindent:
|