Added checks for failed md5sum calculation.

[backups/.git] / scripts / pack-image.sh

diff --git a/scripts/pack-image.sh b/scripts/pack-image.sh
index 4f9c8287c1dc009e8e269dbf77bd45ebcfc93cf0..ea702a5b767c48039455751d21177f402359999b 100755 (executable)
--- a/scripts/pack-image.sh
+++ b/scripts/pack-image.sh
@@ -10,41 +10,51 @@ export PATH=$scriptsdir:/bin:/usr/bin:/sbin:/usr/sbin
 # source the system specific configuration
 [ -f /etc/lsbackups.conf ] && . /etc/lsbackups.conf
 
+simulate=
+# process command line arguments
+case "$1" in
+  -s) simulate=1;;
+esac
+
 # file locations and other values
 today=$(date +%Y%m%d%H%M%S)
-isoimage="$imagedir/$today.img"
+isoimage="$imagedir/$today.iso"
 isomountdir="$isoimage.mnt"
 restorescript="$scriptsdir/restore.sh"
 
+echo "-> Checking for available disk space on $imagedir"
+available=$(df $imagedir | awk '{print$4}' | grep -E "[0-9]+")
+required=$((imagesizemb*1024))
+[ $required -gt $available ] && err "Not enough space for the backup image on $imagedir"
+
 echo "-> Creating directories"
 mkdir --mode=700 -p $datadir $imagedir $isomountdir $tmpdir
-if [ $? != 0 ] 
-then
-  if test -d $isomountdir
-  then
-    rm -rf $isomountdir
-  fi
+if [ $? != 0 ]; then
+  test -d $isomountdir && rm -rf $isomountdir
   err "Unable to create the following directories:
   $datadir $imagedir $isomountdir $tmpdir"
 fi
 
 echo "-> Creating the iso image in $isoimage"
-dd of=$isoimage bs=1M count=0 seek=4440
+dd of=$isoimage bs=1M count=0 seek=$imagesizemb
 
 [ $? != 0 ] && err "dd failed to create $isoimage"
 
-mke2fs -b 2048 -F $isoimage
-
-if [ $? != 0 ]
-then
+mke2fs -b $blocksize -F $isoimage
+if [ $? != 0 ]; then
   rm -rf $isomountdir $isoimage
   err "Unable to create the iso image: $isoimage"
 fi
 
+e2label $isoimage $today
+if [ $? != 0 ]; then
+  rm -rf $isomountdir $isoimage
+  err "Unable to label the iso image: $isoimage"
+fi
+
 echo "-> Mounting the iso image"
 mount -t ext2 -o loop $isoimage $isomountdir
-if [ $? != 0 ]
-then
+if [ $? != 0 ]; then
   rm -rf $isomountdir $isoimage
   err "Unable to mount the iso image: $isoimage -> $isomountdir"
 fi
@@ -57,8 +67,7 @@ echo "-> Running find to get the status of files"
 {
   for type in d f l; do
     findformat="$type %#m %u %g %s %CY%Cm%Cd%CH%CM%CS 0 %p\0"
-    if [ -z $excludedirs ]
-    then 
+    if [ -z "$excludedirs" ]; then
       find $backupdirs -type $type -printf "$findformat"
     else
       echo $excludedirs | sed -e 's/ /\n/g' > $tmpdir/excluded
@@ -67,6 +76,10 @@ echo "-> Running find to get the status of files"
   done
 } > $currentfiles
 
+if [ -n "$simulate" ]; then
+  backupdbin=$backupdbout
+fi
+
 echo "-> Determining list of files to backup with lsbackups"
 {
   # lsbackups expects the current date followed by a null before the list of files
@@ -74,21 +87,29 @@ echo "-> Determining list of files to backup with lsbackups"
   cat $currentfiles
 } | lsbackups > $backups 2>$statusfile
 
+if [ -n "$simulate" ]; then
+   umount $isomountdir
+   rm -rf $isomountdir $isoimage
+   cat $statusfile
+   echo "-> Simulated backup complete! Backup database: $backupdbout"
+   exit;
+fi
+
 echo "-> Running rsync to pack the image"
 rsyncopts="-W -H -S -l -p -t -g -o -0 --files-from=- --stats --progress"
 cat $backups | rsync $rsyncopts / $isomountdir
-if [ $? != 0 ]
-then
+if [ $? != 0 ]; then
   umount $isomountdir
-  rm -rf $isomountdir $isoimage $backupdb.tmp
+  rm -rf $isomountdir $isoimage $backupdbout
   err "Unable to rsync to pack the image"
 fi
 
 echo "-> Copying over database and status file"
-mv $backupdb.tmp $backupdb
-cp $statusfile $backupdb $restorescript $isomountdir
+cp $backupdbout $isomountdir/$(basename $backupdbin)
+[ $? != 0 ] && err "Unable to copy the database to $isomountdir"
 
-[ $? != 0 ] && err "Unable to copy the database and status file"
+cp $statusfile $restorescript $isomountdir
+[ $? != 0 ] && err "Unable to copy the status file to $isomountdir"
 
 echo "-> Unmounting image"
 umount $isomountdir
@@ -99,9 +120,14 @@ echo "-> Calculating md5sum for image"
 md5sum $isoimage | awk '{print$1}' > $isoimage.md5sum
 
 [ $? != 0 ] && err "Unable to calculate the md5sum for this image: $isoimage"
+[ -z "$isoimage.md5sum" ] && err "Unable to calculate the md5sum for this image: $isoimage"
+[ -s "$isoimage.md5sum" ] || err "Unable to calculate the md5sum for this image: $isoimage"
 
 cat $statusfile | mailx -s "DVD image available to burn - $today" $mailto
 
 echo $today > $lastbackupfile
 
+echo "-> Moving new database to $backupdbin"
+mv $backupdbout $backupdbin
+[ $? != 0 ] && err "Unable to move backupdb: $backupdbout to $backupdbin"