#!/bin/sh
+# Locking
+LOCKFILE=/home/backup/backuprun.lockfile
+
+# Initially, we consider everything to be just fine.
+R=0
+
+# Die gracefully (ie. remove lockfile)
+die() {
+ echo `date`": Something nasty happened, and since I fork a lot:"
+ echo `date`": I CANNOT CLEAN UP THE MESS MYSELF."
+ echo `date`": You need to get rid of lost process named stuff like $0, tar and ssh."
+ exit 255
+}
+
+# Trap C-c and kill
+trap die SIGINT SIGTERM
+
+# Don't start if we're already running
+if [ -e $LOCKFILE ]; then
+ echo `date`": $LOCKFILE exists, exiting."
+ exit 1
+fi;
+touch $LOCKFILE
+
#dirs
confdir=/home/backup/conf/ #configuration files
storagedir=/backup #mountpoint of huge disc
export PATH
#start the logfile
-echo `date`": Backup run starting"
-echo "Exclude pattern:"
-cat $exclude
-echo "End exclude pattern"
+echo `date`": Backup run starting" >&2
umask 027
| grep -v "^#" \
| grep -v "^$" `
-
+# Backup only one computer, from command line?
if [ $1 ] ; then
unixcomputers=$1
fi;
-###
#disse bør kunne varieres fra fs til fs?
maksantallfulle=3 #hvor mange fulle vi tar vare på
backup()
{
- printf "%-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup"
+ echo -n `date` >&2
+ printf " $computer: %-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup" >&2
if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
then
exf=`ssh $computer "ls ~/.backup/exclude"`
#We try to run tar on the remote computer
+ # z gzip it
# c create archive
# C change to directory first
# - output to stdout (we pipe to gzip, then to dd)
# ..to dd, to output to a file. We surpress messages from dd.
# And at last, redirect stderr to stdout, to get output logged.
TARFILE=$DATE.tmp
- TARCMD="ssh $computer \"$tar --one-file-system -cf - -C $filesystem . $lastcmd \
- --exclude-from=$exf | gzip\" | (dd of=$TARFILE 2> /dev/null) 2>&1"
- echo "cmdline: $TARCMD"
- eval $TARCMD
-
- # Ideally, we should check wether the tar command returned 0 or not, but it
- # seems a pipe in bash returns the value of the last command in the pipe.
- # Instead, we check wether the resulting file has zero size, in which case we
- # consider it an error.
- if [ -s $TARFILE ]; then
- echo `date`": command probably ran without errors."
- #perhaps it did work
+ TARCMD="ssh $computer \"$tar --one-file-system -zcf - -C $filesystem . $lastcmd \
+ --exclude-from=$exf\" > $TARFILE"
+ echo `date`" $computer: Running $TARCMD" >&2
+
+ if eval $TARCMD; then
mv $TARFILE $DATE.tgz
#make a filelist.
#update the datefile if the filelist is ok.
else
#it did not work
rm $TARFILE
- echo `date`": $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
+ echo `date`" $computer: $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
+
+ # We don't want to return 0
+ R=1
fi
}
for computer in $unixcomputers
do
(
- echo `date`": Backing up $computer"
+ echo `date`" $computer: Backing up $computer" >&2
# Try to SSH to the computer without entering a password.
- if `ssh -n -o NumberOfPasswordPrompts=0 $computer /bin/true`; then
- echo "Passwordless SSH to $computer works."
- else
- echo "Could not use passwordless SSH to $computer."
+ if ! `ssh -n -o NumberOfPasswordPrompts=0 $computer /bin/true`; then
+ echo `date`" $computer: Could not use passwordless SSH."
+
+ # We don't want to return 0
+ R=1
break;
fi
| grep -v "^$" \
| awk '{ if ( $(NF-1) != "0" ) print $2}' `
- echo "Filesystems to backup on $computer: $filesystems"
-
#clean up our dir at this client
if ! ssh $computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"; then
- echo "Could not create backup staging area at $computer:~/.backup"
+ echo `date`" $computer: Could not create backup staging area at $computer:~/.backup"
+ # We don't want to return 0
+ R=1
break;
fi
#try to copy $exclude to $computer
if ! scp $exclude $computer:~/.backup/exclude > /dev/null; then
- echo "Could not copy exclude.txt to $computer"
+ echo `date`" $computer: Could not copy exclude.txt to $computer"
+ # We don't want to return 0
+ R=1
break;
fi
#try to copy preeexec and postexec if they exist
+# TODO: Gah, clean this mess!
[ -f $confdir/preexec.$computer ] && (
scp $confdir/preexec.$computer $computer:~/.backup/preexec ||
- ( echo "Could not copy preexec.$computer to $computer:~/.backup/preexec"; break )
+ ( echo `date`" $computer: Could not copy preexec.$computer to $computer:~/.backup/preexec";
+ R=1
+ break
+ )
)
[ -f $confdir/postexec.$computer ] && (
scp $confdir/postexec.$computer $computer:~/.backup/postexec ||
- ( echo "Could not copy postexec.$computer to $computer:~/.backup/postexec"; break )
+ ( echo `date`" $computer: Could not copy postexec.$computer to $computer:~/.backup/postexec"
+ break
+ R=1
+ )
)
#try to run preexec if it exist
#gå ned i rett katalog, eller dø
# TODO bør sende mail om dette skjer!
- cd $storagedir/$computer/$sfilesystem/$backuplevel || exit 1
+ cd $storagedir/$computer/$sfilesystem/$backuplevel || die
#perform the actual backup
backup
for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail +$mf`
do
prefix=`echo $full | sed "s/\.[^.]*$//"`
- echo "$computer:$filesystem sletter full $prefix (for mange)"
+ echo `date`": $computer:$filesystem sletter full $prefix (for mange)" >&2
rm $prefix*
done
-type f \
\! -newer $oldf \
-exec rm {} \;
-# #denne funker bare med gnu find
-# #-printf "$computer:$filesystem sletter daglig %f (for gammel)\n"
done
#try to run postexec if it exist
wait
-#create report
-# (Hasn't been working for years -berge)
-#/home/backup/report.sh $storagedir > /tmp/report.txt
-#[ ! -z $remotestat ] && scp /tmp/report.txt $remotestat
-###
-
-# print diskusage to logfile
-echo "Current disk usage:"
-df -k
+# Remove lockfile
+rm $LOCKFILE
-echo `date`": Backup run ended"
+# Did anything go wrong?
+if [ $R != 0 ]; then
+ echo `date`": Backup run ended with errors, check logs."
+ exit 1
+else
+ echo `date`": Backup run ended" >&2
+fi
projects / backup.sh / blobdiff