683 lines
17 KiB
Bash
683 lines
17 KiB
Bash
#!/bin/sh
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#
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# 2005-2009 Nico Schottelius (nico-ccollect at schottelius.org)
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#
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# This file is part of ccollect.
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#
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# ccollect is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# ccollect is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with ccollect. If not, see <http://www.gnu.org/licenses/>.
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#
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# Initially written for SyGroup (www.sygroup.ch)
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# Date: Mon Nov 14 11:45:11 CET 2005
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#
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# Standard variables (stolen from cconf)
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#
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__pwd="$(pwd -P)"
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__mydir="${0%/*}"; __abs_mydir="$(cd "$__mydir" && pwd -P)"
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__myname=${0##*/}; __abs_myname="$__abs_mydir/$__myname"
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#
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# where to find our configuration and temporary file
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#
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CCOLLECT_CONF=${CCOLLECT_CONF:-/etc/ccollect}
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CSOURCES=${CCOLLECT_CONF}/sources
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CDEFAULTS=${CCOLLECT_CONF}/defaults
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CPREEXEC="${CDEFAULTS}/pre_exec"
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CPOSTEXEC="${CDEFAULTS}/post_exec"
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TMP=$(mktemp "/tmp/${__myname}.XXXXXX")
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VERSION=0.7.1
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RELEASE="2009-02-02"
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HALF_VERSION="ccollect ${VERSION}"
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FULL_VERSION="ccollect ${VERSION} (${RELEASE})"
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#TSORT="tc" ; NEWER="cnewer"
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TSORT="t" ; NEWER="newer"
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#
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# CDATE: how we use it for naming of the archives
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# DDATE: how the user should see it in our output (DISPLAY)
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#
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CDATE="date +%Y%m%d-%H%M"
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DDATE="date +%Y-%m-%d-%H:%M:%S"
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#
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# unset parallel execution
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#
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PARALLEL=""
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#
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# catch signals
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#
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trap "rm -f \"${TMP}\"" 1 2 15
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#
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# Functions
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#
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# time displaying echo
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_techo()
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{
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echo "$(${DDATE}): $@"
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}
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# exit on error
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_exit_err()
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{
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_techo "$@"
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rm -f "${TMP}"
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exit 1
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}
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add_name()
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{
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awk "{ print \"[${name}] \" \$0 }"
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}
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pcmd()
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{
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if [ "$remote_host" ]; then
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ssh "$remote_host" "$@"
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else
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"$@"
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fi
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}
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#
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# Version
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#
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display_version()
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{
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echo "${FULL_VERSION}"
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exit 0
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}
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#
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# Tell how to use us
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#
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usage()
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{
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echo "${__myname}: <interval name> [args] <sources to backup>"
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echo ""
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echo " ccollect creates (pseudo) incremental backups"
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echo ""
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echo " -h, --help: Show this help screen"
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echo " -p, --parallel: Parallelise backup processes"
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echo " -a, --all: Backup all sources specified in ${CSOURCES}"
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echo " -v, --verbose: Be very verbose (uses set -x)"
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echo " -V, --version: Print version information"
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echo ""
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echo " This is version ${VERSION}, released on ${RELEASE}"
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echo " (the first version was written on 2005-12-05 by Nico Schottelius)."
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echo ""
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echo " Retrieve latest ccollect at http://unix.schottelius.org/ccollect/"
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exit 0
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}
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#
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# Select interval if AUTO
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#
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# For this to work nicely, you have to choose interval names that sort nicely
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# such as int1, int2, int3 or a_daily, b_weekly, c_monthly, etc.
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#
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auto_interval()
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{
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if [ -d "${backup}/intervals" -a -n "$(ls "${backup}/intervals" 2>/dev/null)" ] ; then
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intervals_dir="${backup}/intervals"
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elif [ -d "${CDEFAULTS}/intervals" -a -n "$(ls "${CDEFAULTS}/intervals" 2>/dev/null)" ] ; then
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intervals_dir="${CDEFAULTS}/intervals"
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else
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_exit_err "No intervals are defined. Skipping."
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fi
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echo intervals_dir=${intervals_dir}
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trial_interval="$(ls -1r "${intervals_dir}/" | head -n 1)" || \
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_exit_err "Failed to list contents of ${intervals_dir}/."
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_techo "Considering interval ${trial_interval}"
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most_recent="$(pcmd ls -${TSORT}p1 "${ddir}" | grep "^${trial_interval}.*/$" | head -n 1)" || \
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_exit_err "Failed to list contents of ${ddir}/."
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_techo " Most recent ${trial_interval}: '${most_recent}'"
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if [ -n "${most_recent}" ]; then
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no_intervals="$(ls -1 "${intervals_dir}/" | wc -l)"
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n=1
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while [ "${n}" -le "${no_intervals}" ]; do
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trial_interval="$(ls -p1 "${intervals_dir}/" | tail -n+${n} | head -n 1)"
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_techo "Considering interval '${trial_interval}'"
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c_interval="$(cat "${intervals_dir}/${trial_interval}" 2>/dev/null)"
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m=$((${n}+1))
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set -- "${ddir}" -maxdepth 1
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while [ "${m}" -le "${no_intervals}" ]; do
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interval_m="$(ls -1 "${intervals_dir}/" | tail -n+${m} | head -n 1)"
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most_recent="$(pcmd ls -${TSORT}p1 "${ddir}" | grep "^${interval_m}\..*/$" | head -n 1)"
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_techo " Most recent ${interval_m}: '${most_recent}'"
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if [ -n "${most_recent}" ] ; then
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set -- "$@" -$NEWER "${ddir}/${most_recent}"
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fi
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m=$((${m}+1))
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done
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count=$(pcmd find "$@" -iname "${trial_interval}*" | wc -l)
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_techo " Found $count more recent backups of ${trial_interval} (limit: ${c_interval})"
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if [ "$count" -lt "${c_interval}" ] ; then
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break
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fi
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n=$((${n}+1))
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done
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fi
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export INTERVAL="${trial_interval}"
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D_FILE_INTERVAL="${intervals_dir}/${INTERVAL}"
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D_INTERVAL=$(cat "${D_FILE_INTERVAL}" 2>/dev/null)
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}
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#
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# need at least interval and one source or --all
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#
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if [ $# -lt 2 ]; then
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if [ "$1" = "-V" -o "$1" = "--version" ]; then
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display_version
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else
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usage
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fi
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fi
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#
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# check for configuraton directory
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#
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[ -d "${CCOLLECT_CONF}" ] || _exit_err "No configuration found in " \
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"\"${CCOLLECT_CONF}\" (is \$CCOLLECT_CONF properly set?)"
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#
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# Filter arguments
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#
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export INTERVAL="$1"; shift
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i=1
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no_sources=0
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#
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# Create source "array"
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#
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while [ "$#" -ge 1 ]; do
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eval arg=\"\$1\"; shift
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if [ "${NO_MORE_ARGS}" = 1 ]; then
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eval source_${no_sources}=\"${arg}\"
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no_sources=$((${no_sources}+1))
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# make variable available for subscripts
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eval export source_${no_sources}
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else
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case "${arg}" in
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-a|--all)
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ALL=1
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;;
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-v|--verbose)
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VERBOSE=1
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;;
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-p|--parallel)
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PARALLEL=1
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;;
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-h|--help)
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usage
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;;
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--)
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NO_MORE_ARGS=1
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;;
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*)
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eval source_${no_sources}=\"$arg\"
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no_sources=$(($no_sources+1))
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;;
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esac
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fi
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i=$(($i+1))
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done
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# also export number of sources
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export no_sources
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#
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# be really, really, really verbose
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#
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if [ "${VERBOSE}" = 1 ]; then
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set -x
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fi
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#
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# Look, if we should take ALL sources
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#
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if [ "${ALL}" = 1 ]; then
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# reset everything specified before
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no_sources=0
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#
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# get entries from sources
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#
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cwd=$(pwd -P)
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( cd "${CSOURCES}" && ls > "${TMP}" ); ret=$?
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[ "${ret}" -eq 0 ] || _exit_err "Listing of sources failed. Aborting."
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while read tmp; do
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eval source_${no_sources}=\"${tmp}\"
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no_sources=$((${no_sources}+1))
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done < "${TMP}"
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fi
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#
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# Need at least ONE source to backup
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#
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if [ "${no_sources}" -lt 1 ]; then
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usage
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else
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_techo "${HALF_VERSION}: Beginning backup using interval ${INTERVAL}"
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fi
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#
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# Look for pre-exec command (general)
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#
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if [ -x "${CPREEXEC}" ]; then
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_techo "Executing ${CPREEXEC} ..."
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"${CPREEXEC}"; ret=$?
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_techo "Finished ${CPREEXEC} (return code: ${ret})."
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[ "${ret}" -eq 0 ] || _exit_err "${CPREEXEC} failed. Aborting"
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fi
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#
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# check default configuration
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#
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D_FILE_INTERVAL="${CDEFAULTS}/intervals/${INTERVAL}"
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D_INTERVAL=$(cat "${D_FILE_INTERVAL}" 2>/dev/null)
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#
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# Let's do the backup
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#
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i=0
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while [ "${i}" -lt "${no_sources}" ]; do
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#
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# Get current source
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#
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eval name=\"\$source_${i}\"
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i=$((${i}+1))
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export name
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#
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# start ourself, if we want parallel execution
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#
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if [ "${PARALLEL}" ]; then
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"$0" "${INTERVAL}" "${name}" &
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continue
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fi
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#
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# Start subshell for easy log editing
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#
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(
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#
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# Stderr to stdout, so we can produce nice logs
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#
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exec 2>&1
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#
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# Configuration
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#
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backup="${CSOURCES}/${name}"
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c_source="${backup}/source"
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c_dest="${backup}/destination"
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c_exclude="${backup}/exclude"
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c_verbose="${backup}/verbose"
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c_vverbose="${backup}/very_verbose"
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c_rsync_extra="${backup}/rsync_options"
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c_summary="${backup}/summary"
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c_pre_exec="${backup}/pre_exec"
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c_post_exec="${backup}/post_exec"
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f_incomplete="delete_incomplete"
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c_incomplete="${backup}/${f_incomplete}"
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c_remote_host="${backup}/remote_host"
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#
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# Marking backups: If we abort it's not removed => Backup is broken
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#
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c_marker=".ccollect-marker"
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#
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# Times
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#
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begin_s=$(date +%s)
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#
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# unset possible options
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#
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EXCLUDE=""
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RSYNC_EXTRA=""
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SUMMARY=""
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VERBOSE=""
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VVERBOSE=""
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DELETE_INCOMPLETE=""
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_techo "Beginning to backup"
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#
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# Standard configuration checks
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#
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if [ ! -e "${backup}" ]; then
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_exit_err "Source does not exist."
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fi
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#
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# configuration _must_ be a directory
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#
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if [ ! -d "${backup}" ]; then
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_exit_err "\"${name}\" is not a cconfig-directory. Skipping."
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fi
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#
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# first execute pre_exec, which may generate destination or other
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# parameters
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#
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if [ -x "${c_pre_exec}" ]; then
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_techo "Executing ${c_pre_exec} ..."
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"${c_pre_exec}"; ret="$?"
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_techo "Finished ${c_pre_exec} (return code ${ret})."
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if [ "${ret}" -ne 0 ]; then
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_exit_err "${c_pre_exec} failed. Skipping."
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fi
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fi
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#
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# Destination is a path
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#
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if [ ! -f "${c_dest}" ]; then
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_exit_err "Destination ${c_dest} is not a file. Skipping."
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else
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ddir=$(cat "${c_dest}"); ret="$?"
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if [ "${ret}" -ne 0 ]; then
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_exit_err "Destination ${c_dest} is not readable. Skipping."
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fi
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fi
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#
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# interval definition: First try source specific, fallback to default
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#
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if [ ${INTERVAL} = "AUTO" ] ; then
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auto_interval
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_techo "Selected interval: '$INTERVAL'"
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fi
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c_interval="$(cat "${backup}/intervals/${INTERVAL}" 2>/dev/null)"
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if [ -z "${c_interval}" ]; then
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c_interval="${D_INTERVAL}"
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if [ -z "${c_interval}" ]; then
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_exit_err "No definition for interval \"${INTERVAL}\" found. Skipping."
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fi
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fi
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#
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# Source checks
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#
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if [ ! -f "${c_source}" ]; then
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_exit_err "Source description \"${c_source}\" is not a file. Skipping."
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else
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source=$(cat "${c_source}"); ret="$?"
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if [ "${ret}" -ne 0 ]; then
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_exit_err "Source ${c_source} is not readable. Skipping."
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fi
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fi
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# Verify source is up and accepting connections before deleting any old backups
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rsync "$source" >/dev/null || _exit_err "Source ${source} is not readable. Skipping."
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#
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# do we backup to a remote host? then set pre-cmd
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#
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if [ -f "${c_remote_host}" ]; then
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# adjust ls and co
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remote_host=$(cat "${c_remote_host}"); ret="$?"
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if [ "${ret}" -ne 0 ]; then
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_exit_err "Remote host file ${c_remote_host} exists, but is not readable. Skipping."
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fi
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destination="${remote_host}:${ddir}"
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else
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remote_host=""
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destination="${ddir}"
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fi
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export remote_host
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#
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# check for existence / use real name
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#
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( pcmd cd "$ddir" ) || _exit_err "Cannot change to ${ddir}. Skipping."
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#
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# Check whether to delete incomplete backups
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#
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if [ -f "${c_incomplete}" -o -f "${CDEFAULTS}/${f_incomplete}" ]; then
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DELETE_INCOMPLETE="yes"
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fi
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# NEW method as of 0.6:
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# - insert ccollect default parameters
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# - insert options
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# - insert user options
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#
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# rsync standard options
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#
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set -- "$@" "--archive" "--delete" "--numeric-ids" "--relative" \
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"--delete-excluded" "--sparse"
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#
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# exclude list
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#
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if [ -f "${c_exclude}" ]; then
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set -- "$@" "--exclude-from=${c_exclude}"
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fi
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#
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# Output a summary
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#
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if [ -f "${c_summary}" ]; then
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set -- "$@" "--stats"
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fi
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#
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# Verbosity for rsync
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#
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if [ -f "${c_vverbose}" ]; then
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set -- "$@" "-vv"
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elif [ -f "${c_verbose}" ]; then
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set -- "$@" "-v"
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fi
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#
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# extra options for rsync provided by the user
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#
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if [ -f "${c_rsync_extra}" ]; then
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while read line; do
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set -- "$@" "$line"
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done < "${c_rsync_extra}"
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fi
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#
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# Check for incomplete backups
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#
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pcmd ls -1 "$ddir/${INTERVAL}"*".${c_marker}" > "${TMP}" 2>/dev/null
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i=0
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while read incomplete; do
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eval incomplete_$i=\"$(echo ${incomplete} | sed "s/\\.${c_marker}\$//")\"
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i=$(($i+1))
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done < "${TMP}"
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j=0
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while [ "$j" -lt "$i" ]; do
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eval realincomplete=\"\$incomplete_$j\"
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_techo "Incomplete backup: ${realincomplete}"
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if [ "${DELETE_INCOMPLETE}" = "yes" ]; then
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_techo "Deleting ${realincomplete} ..."
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pcmd rm $VVERBOSE -rf "${ddir}/${realincomplete}" || \
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_exit_err "Removing ${realincomplete} failed."
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fi
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j=$(($j+1))
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done
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#
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# check if maximum number of backups is reached, if so remove
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# use grep and ls -p so we only look at directories
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#
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count="$(pcmd ls -p1 "${ddir}" | grep "^${INTERVAL}\..*/\$" | wc -l \
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| sed 's/^ *//g')" || _exit_err "Counting backups failed"
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_techo "Existing backups: ${count} Total keeping backups: ${c_interval}"
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if [ "${count}" -ge "${c_interval}" ]; then
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substract=$((${c_interval} - 1))
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remove=$((${count} - ${substract}))
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_techo "Removing ${remove} backup(s)..."
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pcmd ls -${TSORT}p1r "$ddir" | grep "^${INTERVAL}\..*/\$" | \
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head -n "${remove}" > "${TMP}" || \
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_exit_err "Listing old backups failed"
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i=0
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while read to_remove; do
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eval remove_$i=\"${to_remove}\"
|
|
i=$(($i+1))
|
|
done < "${TMP}"
|
|
|
|
j=0
|
|
while [ "$j" -lt "$i" ]; do
|
|
eval to_remove=\"\$remove_$j\"
|
|
_techo "Removing ${to_remove} ..."
|
|
pcmd rm ${VVERBOSE} -rf "${ddir}/${to_remove}" || \
|
|
_exit_err "Removing ${to_remove} failed."
|
|
j=$(($j+1))
|
|
done
|
|
fi
|
|
|
|
|
|
#
|
|
# Check for backup directory to clone from: Always clone from the latest one!
|
|
#
|
|
# Depending on your file system, you may want to sort on:
|
|
# 1. mtime (modification time) with TSORT=t, or
|
|
# 2. ctime (last change time, usually) with TSORT=tc
|
|
last_dir="$(pcmd ls -${TSORT}p1 "${ddir}" | grep '/$' | head -n 1)" || \
|
|
_exit_err "Failed to list contents of ${ddir}."
|
|
|
|
#
|
|
# clone from old backup, if existing
|
|
#
|
|
if [ "${last_dir}" ]; then
|
|
set -- "$@" "--link-dest=${ddir}/${last_dir}"
|
|
_techo "Hard linking from ${last_dir}"
|
|
fi
|
|
|
|
|
|
# set time when we really begin to backup, not when we began to remove above
|
|
destination_date=$(${CDATE})
|
|
destination_dir="${ddir}/${INTERVAL}.${destination_date}.$$"
|
|
destination_full="${destination}/${INTERVAL}.${destination_date}.$$"
|
|
|
|
# give some info
|
|
_techo "Beginning to backup, this may take some time..."
|
|
|
|
_techo "Creating ${destination_dir} ..."
|
|
pcmd mkdir ${VVERBOSE} "${destination_dir}" || \
|
|
_exit_err "Creating ${destination_dir} failed. Skipping."
|
|
|
|
#
|
|
# added marking in 0.6 (and remove it, if successful later)
|
|
#
|
|
pcmd touch "${destination_dir}.${c_marker}"
|
|
|
|
#
|
|
# the rsync part
|
|
#
|
|
_techo "Transferring files..."
|
|
rsync "$@" "${source}" "${destination_full}"; ret=$?
|
|
# Correct the modification time:
|
|
pcmd touch "${destination_dir}"
|
|
|
|
#
|
|
# remove marking here
|
|
#
|
|
if [ "$ret" -ne 12 ] ; then
|
|
pcmd rm "${destination_dir}.${c_marker}" || \
|
|
_exit_err "Removing ${destination_dir}/${c_marker} failed."
|
|
fi
|
|
|
|
_techo "Finished backup (rsync return code: $ret)."
|
|
if [ "${ret}" -ne 0 ]; then
|
|
_techo "Warning: rsync exited non-zero, the backup may be broken (see rsync errors)."
|
|
fi
|
|
|
|
#
|
|
# post_exec
|
|
#
|
|
if [ -x "${c_post_exec}" ]; then
|
|
_techo "Executing ${c_post_exec} ..."
|
|
"${c_post_exec}"; ret=$?
|
|
_techo "Finished ${c_post_exec}."
|
|
|
|
if [ ${ret} -ne 0 ]; then
|
|
_exit_err "${c_post_exec} failed."
|
|
fi
|
|
fi
|
|
|
|
# Calculation
|
|
end_s=$(date +%s)
|
|
|
|
full_seconds=$((${end_s} - ${begin_s}))
|
|
hours=$((${full_seconds} / 3600))
|
|
seconds=$((${full_seconds} - (${hours} * 3600)))
|
|
minutes=$((${seconds} / 60))
|
|
seconds=$((${seconds} - (${minutes} * 60)))
|
|
|
|
_techo "Backup lasted: ${hours}:${minutes}:${seconds} (h:m:s)"
|
|
|
|
) | add_name
|
|
done
|
|
|
|
#
|
|
# Be a good parent and wait for our children, if they are running wild parallel
|
|
#
|
|
if [ "${PARALLEL}" ]; then
|
|
_techo "Waiting for children to complete..."
|
|
wait
|
|
fi
|
|
|
|
#
|
|
# Look for post-exec command (general)
|
|
#
|
|
if [ -x "${CPOSTEXEC}" ]; then
|
|
_techo "Executing ${CPOSTEXEC} ..."
|
|
"${CPOSTEXEC}"; ret=$?
|
|
_techo "Finished ${CPOSTEXEC} (return code: ${ret})."
|
|
|
|
if [ ${ret} -ne 0 ]; then
|
|
_techo "${CPOSTEXEC} failed."
|
|
fi
|
|
fi
|
|
|
|
rm -f "${TMP}"
|
|
_techo "Finished ${WE}"
|
|
|
|
# vim: set shiftwidth=3 tabstop=3 expandtab :
|