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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: (See ls -l or git)
#
# where to find our configuration and temporary file
#
CCOLLECT_CONF=${CCOLLECT_CONF:-/etc/ccollect}
CSOURCES=$CCOLLECT_CONF/sources
CDEFAULTS=$CCOLLECT_CONF/defaults
CPREEXEC="$CDEFAULTS/pre_exec"
CPOSTEXEC="$CDEFAULTS/post_exec"
TMP=$(mktemp /tmp/$(basename $0).XXXXXX)
VERSION=0.3.2
RELEASE="2006-CHANGE-IT-THIS-TIME-NICO"
HALF_VERSION="ccollect $VERSION"
FULL_VERSION="ccollect $VERSION ($RELEASE)"
#
# unset parallel execution
#
PARALLEL=""
#
# catch signals
#
trap "rm -f \"$TMP\"" 1 2 15
add_name()
{
sed "s/^/\[$name\] /"
}
#
# Tell how to use us
#
usage()
{
echo "$(basename $0): <intervall name> [args] <sources to backup>"
echo ""
echo " ccollect creates (pseudo) incremental backups"
echo ""
echo " -h, --help: Show this help screen"
echo " -p, --parallel: Parallelise backup processes"
echo " -a, --all: Backup all sources specified in $CSOURCES"
echo " -v, --verbose: Be very verbose (uses set -x)."
echo ""
echo ""
echo " On 2005-12-05 ccollect was written by Nico Schottelius."
echo ""
echo " This is version $VERSION, released at ${RELEASE}."
echo ""
echo " Retrieve latest ccollect at http://linux.schottelius.org/ccollect/"
exit 0
}
#
# need at least intervall and one source or --all
#
if [ $# -lt 2 ]; then
usage
fi
#
# check for configuraton directory
#
if [ ! -d "$CCOLLECT_CONF" ]; then
echo "No configuration found in \"$CCOLLECT_CONF\"" \
" (set \$CCOLLECT_CONF corectly?)"
exit 1
fi
#
# Filter arguments
#
INTERVALL=$1; shift
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 $arg in
-a|--all)
ALL=1
;;
-v|--verbose)
VERBOSE=1
;;
-p|--parallel)
PARALLEL="1"
;;
-h|--help)
usage
;;
--)
NO_MORE_ARGS=1
;;
*)
eval share_${no_shares}=\"$arg\"
no_shares=$(($no_shares+1))
;;
esac
fi
i=$(($i+1))
done
#
# be really really really verbose
#
if [ "$VERBOSE" = 1 ]; then
set -x
fi
#
# Look, if we should take ALL sources
#
if [ "$ALL" = 1 ]; then
# reset everything specified before
no_shares=0
#
# get entries from sources
#
cwd=$(pwd)
cd "$CSOURCES";
ls > "$TMP"
while read tmp; do
eval share_${no_shares}=\"$tmp\"
no_shares=$(($no_shares+1))
done < "$TMP"
fi
#
# Need at least ONE source to backup
#
if [ "$no_shares" -lt 1 ]; then
usage
else
echo "==> $HALF_VERSION: Beginning backup using intervall $INTERVALL <=="
fi
#
# check default configuration
#
D_FILE_INTERVALL="$CDEFAULTS/intervalls/$INTERVALL"
D_INTERVALL=$(cat $D_FILE_INTERVALL 2>/dev/null)
#
# Look for pre-exec command (general)
#
if [ -x "$CPREEXEC" ]; then
echo "Executing $CPREEXEC ..."
"$CPREEXEC"
echo "Finished ${CPREEXEC}."
fi
#
# Let's do the backup
#
i=0
while [ "$i" -lt "$no_shares" ]; do
#
# Get current share
#
eval name=\$share_${i}
i=$(($i+1))
export name
#
# start ourself, if we want parallel execution
#
if [ "$PARALLEL" ]; then
$0 "$INTERVALL" "$name" &
continue
fi
#
# Start subshell for easy log editing
#
(
#
# Stderr to stdout, so we can produce nice logs
#
exec 2>&1
#
# Standard locations
#
backup="$CSOURCES/$name"
c_source="$backup/source"
c_dest="$backup/destination"
c_exclude="$backup/exclude"
c_verbose="$backup/verbose"
c_vverbose="$backup/very_verbose"
c_rsync_extra="$backup/rsync_options"
c_summary="$backup/summary"
c_pre_exec="$backup/pre_exec"
c_post_exec="$backup/post_exec"
begin=$(date)
begin_s=$(date +%s)
echo "$begin Beginning to backup"
#
# Standard configuration checks
#
if [ ! -e "$backup" ]; then
echo "Source does not exist."
exit 1
fi
if [ ! -d "$backup" ]; then
echo "\"$name\" is not a cconfig-directory. Skipping."
exit 1
fi
#
# intervall definition: First try source specific, fallback to default
#
c_intervall="$(cat "$backup/intervalls/$INTERVALL" 2>/dev/null)"
if [ -z "$c_intervall" ]; then
c_intervall=$D_INTERVALL
if [ -z "$c_intervall" ]; then
echo "Default and source specific intervall missing. Skipping."
exit 1
fi
fi
#
# unset possible options
#
EXCLUDE=""
RSYNC_EXTRA=""
SUMMARY=""
VERBOSE=""
VVERBOSE=""
#
# next configuration checks
#
if [ ! -f "$c_source" ]; then
echo "Source description $c_source is not a file. Skipping."
exit 1
else
source=$(cat "$c_source")
if [ $? -ne 0 ]; then
echo "Skipping: Source $c_source is not readable"
exit 1
fi
fi
if [ ! -d "$c_dest" ]; then
echo "Destination $c_dest does not link to a directory. Skipping"
exit 1
fi
#
# pre_exec
#
if [ -x "$c_pre_exec" ]; then
echo "Executing $c_pre_exec ..."
$c_pre_exec
echo "Finished ${c_pre_exec}."
fi
# exclude
if [ -f "$c_exclude" ]; then
EXCLUDE="--exclude-from=$c_exclude"
fi
# extra options for rsync
if [ -f "$c_rsync_extra" ]; then
RSYNC_EXTRA="$(cat "$c_rsync_extra")"
fi
# verbosity for rsync
if [ -f "$c_verbose" ]; then
VERBOSE="-v"
fi
# Output a summary
if [ -f "$c_summary" ]; then
SUMMARY="--stats"
fi
# MORE verbosity, includes standard verbosity
if [ -f "$c_vverbose" ]; then
VERBOSE="-v"
VVERBOSE="-v"
fi
#
# check if maximum number of backups is reached, if so remove
#
# the created directories are named $INTERVALL.$DA
count=$(ls -d "$c_dest/${INTERVALL}."?* 2>/dev/null | wc -l)
echo "Currently $count backup(s) exist, total 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 ..."
rm $VVERBOSE -rf "$dir"
done < "$TMP"
fi
#
# clone the old directory with hardlinks
#
destination_date=$(date +%Y-%m-%d-%H:%M)
destination_dir="$c_dest/${INTERVALL}.${destination_date}.$$"
last_dir=$(ls -d "$c_dest/${INTERVALL}."?* 2>/dev/null | sort -n | tail -n 1)
# give some info
echo "Beginning to backup, this may take some time..."
# only copy if a directory exists
if [ "$last_dir" ]; then
echo "Hard linking..."
cp -al $VVERBOSE "$last_dir" "$destination_dir"
else
echo "Creating $destination_dir"
mkdir $VVERBOSE "$destination_dir"
fi
if [ $? -ne 0 ]; then
echo "Creating/cloning backup directory failed. Skipping backup."
exit 1
fi
#
# the rsync part
# options partly stolen from rsnapshot
#
echo "Transferring files..."
rsync -a $VERBOSE $RSYNC_EXTRA $EXCLUDE $SUMMARY \
--delete --numeric-ids --relative --delete-excluded \
"$source" "$destination_dir"
if [ "$?" -ne 0 ]; then
echo "rsync failed, backup may be broken (see rsync errors)"
exit 1
fi
echo "$(date) Successfully finished backup"
#
# post_exec
#
if [ -x "$c_post_exec" ]; then
echo "$(date) Executing $c_post_exec ..."
"$c_post_exec"
echo "$(date) Finished ${c_post_exec}."
fi
end_s=$(date +%s)
full_seconds=$(echo "$end_s - $begin_s" | bc -l)
hours=$(echo $full_seconds / 3600 | bc)
seconds=$(echo "$full_seconds - ($hours * 3600)" | bc)
minutes=$(echo $seconds / 60 | bc)
seconds=$(echo "$seconds - ($minutes * 60)" | bc)
echo "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
echo "Waiting for child jobs to complete..."
wait
fi
#
# Look for post-exec command (general)
#
if [ -x "$CPOSTEXEC" ]; then
echo "Executing $CPOSTEXEC ..."
"$CPOSTEXEC"
echo "Finished ${CPOSTEXEC}."
fi
rm -f "$TMP"
echo "==> Finished $WE <=="
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