ccollect/ccollect.sh

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#!/bin/sh
# Nico Schottelius
# written for SyGroup (www.sygroup.ch)
# Date: Mon Nov 14 11:45:11 CET 2005
# Last Modified:
#
# temporary as long as inofficial
#
CCOLLECT_CONF=$HOME/crsnapshot/conf
#
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# where to find our configuration and temporary file
#
CCOLLECT_CONF=${CCOLLECT_CONF:-/etc/ccollect}
CSOURCES=$CCOLLECT_CONF/sources
CDEFAULTS=$CCOLLECT_CONF/defaults
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TMP=$(mktemp /tmp/$(basename $0).XXXXXX)
WE=$(basename $0)
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#
# catch signals
#
trap "rm -f \"$TMP\"" 1 2 15
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#
# errors!
#
errecho()
{
echo "|E> Error: $@" >&2
}
#
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# Tell how to use us
#
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usage()
{
echo "$WE: <intervall name> [args] <sources to backup>"
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echo ""
echo " Nico Schottelius (nico-linux-ccollect schottelius.org) - 2005-12-06"
echo ""
echo " Backup data pseudo incremental"
echo ""
echo " -h, --help: Show this help screen"
echo " -p, --parallel: Parellize backup process"
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echo " -a, --all: Backup all sources specified in $CSOURCES"
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echo ""
echo " Retrieve latest ccollect at http://linux.schottelius.org/ccollect/."
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echo ""
exit 0
}
#
# need at least intervall and one source or --all
#
if [ $# -lt 2 ]; then
usage
fi
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#
# Filter arguments
#
INTERVALL=$1; shift
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i=1
no_shares=0
while [ $i -le $# ]; do
eval arg=\$$i
if [ "$NO_MORE_ARGS" = 1 ]; then
eval share_${no_shares}=\"$arg\"
no_shares=$[$no_shares+1]
else
case $arg in
-a|--all)
ALL=1
;;
-p|--parallel)
PARALLEL=1
;;
-h|--help)
usage
;;
--)
NO_MORE_ARGS=1
;;
*)
eval share_${no_shares}=\"$arg\"
no_shares=$[$no_shares+1]
;;
esac
fi
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i=$[$i+1]
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done
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#
# Look, if we should take ALL sources
#
if [ "$ALL" = 1 ]; then
# reset everything specified before
no_shares=0
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#
# get entries from sources
#
cwd=$(pwd)
cd $CSOURCES;
ls > "$TMP"
while read tmp; do
eval share_${no_shares}=\"$tmp\"
no_shares=$[$no_shares+1]
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done < "$TMP"
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fi
#
# Need at least ONE source to backup
#
if [ "$no_shares" -lt 1 ]; then
usage
else
echo "/o> $WE: Beginning backup using intervall $INTERVALL"
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fi
#
# check default configuration
#
D_FILE_INTERVALL="$CDEFAULTS/intervalls/$INTERVALL"
D_INTERVALL=$(cat $D_FILE_INTERVALL 2>/dev/null)
#
# Let's do the backup
#
i=0
while [ "$i" -lt "$no_shares" ]; do
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#
# Standard locations
#
eval name=\$share_${i}
backup="$CSOURCES/$name"
c_source="$backup/source"
c_dest="$backup/destination"
c_exclude="$backup/exclude"
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c_verbose="$backup/verbose"
echo "/=> Beginning to backup \"$name\" ..."
i=$[$i+1]
#
# Standard configuration checks
#
if [ ! -e "$backup" ]; then
errecho "Source \"$name\" does not exist."
continue
fi
if [ ! -d "$backup" ]; then
errecho "\"$name\" is not a cconfig-directory. Skipping."
continue
fi
#
# intervall definiition
#
c_intervall="$(cat "$backup/intervalls/$INTERVALL" 2>/dev/null)"
if [ -z "$c_intervall" ]; then
c_intervall=$D_INTERVALL
if [ -z "$c_intervall" ]; then
errecho "Default and source specific intervall missing. Skipping."
continue
fi
fi
#
# standard rsync options
#
VERBOSE=""
EXCLUDE=""
#
# next configuration checks
#
if [ ! -f "$c_source" ]; then
echo "|-> Source description $c_source is not a file. Skipping."
continue
else
source=$(cat "$c_source")
if [ $? -ne 0 ]; then
echo "|-> Skipping: Source $c_source is not readable"
continue
fi
fi
if [ ! -d "$c_dest" ]; then
errecho "Destination $c_dest does not link to a directory. Skipping"
continue
fi
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# exclude
if [ -f "$c_exclude" ]; then
EXCLUDE="--exclude-from=$c_exclude"
fi
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# verbose
if [ -f "$c_verbose" ]; then
VERBOSE="-v"
fi
#
# check if maximum number of backups is reached, if so remove
#
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# the created directories are named $INTERVALL.$DATE
count=$(ls -d "$c_dest/${INTERVALL}."?* 2>/dev/null | wc -l)
echo "|-> $count backup(s) already exist, keeping $c_intervall backup(s)."
if [ "$count" -ge "$c_intervall" ]; then
substract=$(echo $c_intervall - 1 | bc)
remove=$(echo $count - $substract | bc)
echo "|-> Removing $remove backup(s)..."
ls -d "$c_dest/${INTERVALL}."?* | sort -n | head -n $remove > "$TMP"
while read to_remove; do
dir="$to_remove"
echo "|-> Removing $dir ..."
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rm -rf "$dir"
done < "$TMP"
fi
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#
# clone the old directory with hardlinks
#
destination_date=$(date +%Y-%m-%d-%H:%M)
destination_dir="$c_dest/${INTERVALL}.${destination_date}.$$"
last_dir=$(ls -d "$c_dest/${INTERVALL}."?* 2>/dev/null | sort -n | tail -n 1)
# only copy if a directory exists
if [ "$last_dir" ]; then
# echo cp -al "$last_dir" "$destination_dir"
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cp $VERBOSE -al "$last_dir" "$destination_dir"
else
mkdir "$destination_dir"
fi
if [ $? -ne 0 ]; then
errecho "Creating/cloning backup directory failed. Skipping backup."
continue
fi
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#
# the rsync part
# options stolen shameless from rsnapshot
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#
rsync -a $VERBOSE --delete --numeric-ids --relative --delete-excluded \
"$EXCLUDE" $EXCLUDE "$source" "$destination_dir"
if [ $? -ne 0 ]; then
errecho "rsync failed, backup most likely broken"
continue
fi
echo "\=> Successfully finished backup of \"$name\"."
done
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#
# Be a good parent and wait for our children, if they are running wild parallel
#
if [ "$PARALLEL" = 1 ]; then
wait
fi
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rm -f "$TMP"
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echo "\o> Finished $WE."