Bump the revision number

[backups/.git] / scripts / restore-script.sh

diff --git a/scripts/restore-script.sh b/scripts/restore-script.sh
index 0796bef2d9155e5d1e99e1a52f66f4bd97710af0..af5a80cd684deee617c8cc4cedd522f6d6e3cca6 100755 (executable)
--- a/scripts/restore-script.sh
+++ b/scripts/restore-script.sh
@@ -8,54 +8,84 @@ function err() {
 [ -n "$3" ] && mountdir=$3
 
 [ -z "$mountdir" ] && err '$mountdir must be set'
-[ -z "$rundir"   ] && err '$rundir must be set'
 
-export PATH=${rundir%%/}:/bin:/usr/bin:/sbin:/usr/sbin:/sw/bin
+rundir=${rundir:-$(dirname $0)}
 
-if [ ! -z "$1" -o ! -d "$2" ]; then
+export PATH=${rundir%/}:/bin:/usr/bin:/sbin:/usr/sbin:/sw/bin
+
+if [ -z "$1" -o ! -d "$2" ]; then
   err "
-Usage: $0 <source-dir> <relocate-dir> [<mnt-dir>]
-       source-dir   - directory on backup disks to restore from (relative to $mountdir)
-       relocate-dir - base directory to restore files to        (usually /)
-       mnt-dir      - directory where backup disk is mounted    (optional)
-
-  Examples:
-    % $0 / / /mnt/cdrom # Restore everything from disks (explicitly specifying dvd mount point.)
-    % $0 / /            # Restore everything from disks
-    % $0 /home /        # Restore only files under /home on disks to /home on the system
-    % $0 /home /home    # Restore files under /home on disks to /home/home on the system (probably not what you want.)
+
+Usage: $(basename $0) <source-dir> <relocate-dir> [<mnt-dir> [remote_user@remote_host]]
+  source-dir   - Directory on backup disks to restore (relative to
+                 $mountdir)
+  relocate-dir - Base directory to restore files into (usually /)
+  mnt-dir      - Directory where backup disk is mounted (optional)
+
+Examples:
+  # Restore everything from disks (explicitly specifying dvd mount point.)
+  % $(basename $0) / / /mnt/cdrom
+
+  # Restore everything from disks
+  % $(basename $0) / /
+
+  # Restore only files under /home on disks to /home on the system
+  % $(basename $0) /home /
+
+  # Restore files under /home on disks to /home/home on the system
+  # (this is usually not what you want.)
+  % $(basename $0) /home /home
 "
 fi
 
-device=$(mount | grep "on ${mountdir%%/} " | awk '{print$1}')
+device=$(mount | grep "on ${mountdir%/} " | awk '{print$1}')
 
 [ -z "$device" ] && err "Cannot determine cdrom device"
 
-cp ${mountdir%%/}/backups.db ${mountdir%%/}/backup-status.txt $rundir
-dbfile=${rundir%%/}/backups.db
+cp ${mountdir%/}/backups.db ${mountdir%/}/backup-status.txt $rundir
+dbfile=${rundir%/}/backups.db
 
 dates=$(cat $dbfile | list-dates.sh)
 
 for date in $dates; do
-  success=false
-  while ! $success; do
-    eject $device
-    [ $? != 0 ] && err "Cannot eject the disk. Drive is busy. Run lsof $mountdir to see why."
-    echo "Please insert backup disk:  $date"
-    echo "Press Enter to continue"
-    read bogus
-    eject -t $device
-
-    # Mount the media
-    mount -t ext2 $device ${mountdir%%/}
-
-    if grep -q $date ${mountdir%%/}/backup-status.txt; then
-      success=true
-    else
-      echo "This doesn't seem to be the right disk."
-    fi
-  done
-
-  rsyncopts="-W -H -S -l -p -t -g -o -0 --files-from=- --stats --progress"
-  cat $dbfile | files-from-date.sh $date | grep -z -Z -e "^${1%/}/" | rsync $rsyncopts ${mountdir%%/}/ ${2%%/}/
+  filelist=$(tempfile)
+  # Check to see if files are actually needed from the current disk before requesting it.
+  cat $dbfile | files-from-date.sh $date | grep -z -Z -e "^${1%/}/" > $filelist
+  if [ -s $filelist ]; then
+    success=false
+    loop=0
+    while ! $success; do
+      eject $device
+      [ $? != 0 ] && err "Cannot eject the disk. Drive is busy. Run lsof $mountdir to see why."
+      echo "Please insert backup disk:  $date"
+      echo "Press Enter to continue"
+      read bogus
+      eject -t $device
+
+      # Mount the media
+      mount -t ext2 $device ${mountdir%/}
+
+      if grep -q $date ${mountdir%/}/backup-status.txt; then
+        success=true
+      elif e2label $device | grep -q $date; then
+        success=true
+      elif [ $loop -gt 2 ]; then
+        echo "I still can't verify the identity of the disk."
+       echo "If you are sure it is correct, press Enter to continue."
+       echo "Otherwise, press CTRL-C to abort."
+       read bogus
+       success=true
+      else 
+        echo "This doesn't seem to be the right disk."
+       loop=$((loop+1))
+      fi
+    done
+
+    rsyncopts="-W -H -S -l -p -t -g -o -0 --files-from=- --stats --progress"
+    [ -z "$4" ] && cat $filelist | rsync $rsyncopts ${mountdir%/}/ ${2%/}/
+    [ -n "$4" ] && cat $filelist | rsync $rsyncopts -e ssh ${mountdir%/}/ ${4}:${2%/}/
+  else
+    echo "No files are needed from disk: $date.  Skipping it."
+  fi
+  rm -f $filelist
 done