[Linux-Biella] tutils per tape DAT SCSI (lungo)

[LeOS]

LeOS wrote:

trestore debuggato e funzionante (da me, betatester cercansi)

----------------


########################################################
# usage:                                               #
# trestore                                             #
########################################################
# NoTe:                                                #
# This program is a part of three shell utils:         #
# tdir - tsave - tinit - trestore                      #
# mt-st needed (of course this is a DAT utility!!!     #
########################################################


# --- Create the temp dir in user home ---
if [ -e ~/tutils ] ; then
   echo "Skipping Directory creation"
else
   mkdir ~/tutils
fi
currentdir=$PWD

# --- Reach End Of Data on Tape ---
mt-st -f /dev/tape eod

# --- Rewind the Tape to reach the begin of saved Catalog ---
mt-st -f /dev/tape bsfm 3

# --- Restore the Catalog and view it ---
cp /dev/tape ~/tutils
tar xf ~/tutils/tape -C ~/tutils

cd ~/tutils

# --- Check the tape contents: if tape is just formatted, exit ---
lun=$(cat catalog |wc -l)
let lunnoheader=lun-6
if [ $lunnoheader -lt 6 ]; then
   echo "The tape is empty..."
   exit
fi

# --- funtions used, just to clean this dirty code ---

viewlist ()
{
   clear
   # --- print first 4 lines: header of the catalog ---
   head -n 4 catalog
   echo
   filename=$(head -n $namepos catalog | tail -n 1)
   begin=$(head -n $beginpos catalog | tail -n 1)
   end=$(head -n $endpos catalog | tail -n 1)
   ondate=$(head -n $datepos catalog | tail -n 1)
   if [ $beginpos = 8 ]; then
     let lastpos=lun-4
     echo "First file:"
   else
     if [ $beginpos = $lastpos ]; then
       echo "Last file:"
     else
       echo "Between First file and Last file ;)"
     fi
   fi
   echo
   begtemp=${begin##"At block "}
   let diff=`expr length $begtemp`-1
   begblock=`expr substr $begtemp 1 $diff`
   endtemp=${end##"At block "}
   let diff=`expr length $endtemp`-1
   endblock=`expr substr $endtemp 1 $diff`
   # --- Format the output ---
   echo -n "| File:"
   let difflen=`expr length $filename`-5
   for ((counter=1 ; counter<=difflen ; counter++))
   do
     echo -n " "
   done
   echo -n " | Begin:"
   let difflen=`expr length $begblock`-6
   for ((counter=1 ; counter<=difflen ; counter++))
   do
     echo -n " "
   done
   echo -n " | End:"
   let difflen=`expr length $endblock`-4
   for ((counter=1 ; counter<=difflen ; counter++))
   do
     echo -n " "
   done
   echo -n " | Date:"
   echo
   echo -n "| "$filename
   let difflen=5-`expr length $filename`
   for ((counter=1 ; counter<=difflen ; counter++))
   do
     echo -n " "
   done
   echo -n " | "$begblock
   let difflen=6-`expr length $begblock`
   for ((counter=1 ; counter<=difflen ; counter++))
   do
     echo -n " "
   done
   echo -n " | "$endblock
   let difflen=4-`expr length $endblock`
   for ((counter=1 ; counter<=difflen ; counter++))
   do
     echo -n " "
   done
   echo " | "$ondate
   echo
   echo
   echo "---[ file ]-----------------------------------------------------"
   #echo
   echo "[p]revious    [n]ext    [r]estore    e[x]it    [f]irst    [l]ast"
   #echo
   echo "----------------------------------------------------------------"
   echo
   echo -n "Your choice: "
}


debug ()
{
   echo "| NamePOS: "$namepos" |   | BeginPOS: "$beginpos" |   | Lun: 
"$lun" |   | LunOK: "$lunok" |"
   echo
}

# --- position of the first file name, after the header of the catalog ---
namepos=6

while [ "$action" != x ]

do
   # --- in the catalog file lines change for filename, starting and 
ending position and date ---
   let beginpos=namepos+2
   let endpos=namepos+4
   let datepos=namepos+5

   viewlist

   read -n 1 action
   echo
   echo

   if [ $action = p ] ; then
     if [ $namepos -gt 6 ] ; then
       let namepos=namepos-7
     fi
   fi

   if [ $action = n ] ; then
     let lunok=lun-7
     if [ $namepos -lt $lunok ] ; then
       let namepos=namepos+7
     fi
   fi

   if [ $action = l ] ; then
     let namepos=lun-6
   fi

   if [ $action = f ] ; then
     let namepos=6
   fi

   if [ $action = r ] ; then
     echo "Restoring file: $filename - Beginning Block: $begblock"
     # --- Restore Routine ---
     cd $currentdir
     mkdir restored
     cd restored
     mt-st -f /dev/tape seek $begblock
     cp /dev/tape .
     tar xf tape
     tar zxf tempfile.tar.gz
     rm tempfile.tar.gz ; rm tape
     cd $currentdir
     echo "Done!"
     rm -Rf ~/tutils
     exit
   fi

   if [ $action = x ] ; then
     echo "Nothing done..."
     cd $currentdir
     rm -Rf ~/tutils
     exit
   fi

   if [ $action = q ] ; then
     echo "Nothing done..."
     cd $currentdir
     rm -Rf ~/tutils
     exit
   fi

done