Better dd command

[backups/.git] / scripts / drive.sh

diff --git a/scripts/drive.sh b/scripts/drive.sh
index 6ea91a6bae84a8f21f89a4ec6221cd7ba57a27a5..1693212a8c5b422e9b229b2e9583b73beed1df78 100755 (executable)
--- a/scripts/drive.sh
+++ b/scripts/drive.sh
@@ -6,6 +6,7 @@ bindir="$scriptsdir/../build"
 export PATH=$scriptsdir:$bindir:$PATH
 
 # file locations and other values
+today=$(date +%Y%m%d%H%M%S)
 datadir="/var/lib/backups"
 tmpdir="/dev/shm/backups"
 currentfiles="$tmpdir/files.db"
@@ -20,7 +21,7 @@ touch $isoimage
 # chmod 600 $isoimage
 
 # Create filesystem on iso image here
-dd if=/dev/zero of=$isoimage bs=2048k count=2220
+dd if=/dev/null of=$isoimage bs=2048k count=0 seek=2220
 mke2fs -b 2048 -F $isoimage
 
 echo "Mounting the iso image"
@@ -36,7 +37,11 @@ echo "Running find to get the status of files"
 find-cmd.sh /home > $currentfiles
 
 echo "Determining list of files to backup with lsbackups"
-cat $currentfiles | lsbackups > $backups 2>$statusfile
+{
+  # lsbackups expects the current date followed by a null before the list of files
+  printf "$today\0"
+  cat $currentfiles
+} | lsbackups > $backups 2>$statusfile
 
 echo "Running rsync to pack the image"
 cat $backups | rsync-cmd.sh $isomountdir