#!/bin/sh
# to split a large file into parts
#     Bill Bynum, December 1995
sysbin=/usr/local/bin:/usr/local/gnu/bin:/bin:/usr/bin:/usr/lib
otherbin=$HOME/bin:/home/f85/bynum/bin
PATH=$sysbin:$otherbin:.
# The space available on a 1440K floppy after "mformat a:" is
# 1457764 bytes = 1423K.  The combined sizes of the two scripts
# is around 3K, more or less, depending on the number of pieces
# of the file being saved.  If bsize=1418k, then there should be 
# around 2K free on the fullest disks.
bsize=1418k
case $1 in
"") echo The prefix of the filename of the file to be split is required
   echo  "usage: "`basename $0`"  [ -b binary_size -p new_prefix ]   file_prefix"
   echo  "    splits a file into $bsize byte pieces, then constructs two scripts,"
   echo  "    a save script and a restore script.  The save script guides you through"
   echo  "    the sequence of disk insertions to save the pieces of the file to floppies."
   echo  "    The restore script guides you through the sequence of disk insertions"
   echo  "    to copy the pieces of the file from floppies to hard disk, and then"
   echo  "    reconstitutes the file.  The save script is named file_prefix.sav and"
   echo  "    the restore script is named file_prefix.rst.  Both scripts are copied to"
   echo  "    each floppy."
   echo  ""
   echo  "    'binary_size' is the max size of each disk.  default: $bsize"
   echo  "    'new_prefix' is the prefix to use in creating the storage files"
   echo  "    'file_prefix' is the root of the filename of the file to be split"
   echo  "        for the file 'goo.tar.gz', file_prefix is 'goo'"
   echo  "     If the suffix of the file is neither '.tgz' nor '.tar.gz',"
   echo  "     then you will be prompted for the file suffix."
   exit;;
esac
while true 
do
   case $1 in
   -p)   shift
         prefix=$1
         shift;;
   -b)   shift
         bsize=$1
         shift;;
   *)    case $prefix in
         "") prefix=$1;;
         esac
         break;;
   esac
done
if (test ! -f $1.tgz) then
   if (test ! -f $1.tar.gz) then
      echo -n "Enter file suffix (no period): "
      read suffix
      if (test ! -f $1.$suffix) then
         echo "The file \"$1.$suffix\" does not exist!"
         exit
      fi
   else
      suffix=tar.gz
   fi
else
   suffix=tgz
fi
# Split the file to be saved
echo "Splitting $1.$suffix in pieces no larger than $bsize ..."
split -b $bsize $1.$suffix $prefix.
# create the save and restore scripts
rstf=$prefix.rst
savf=$prefix.sav
rm -f $rstf $savf
echo "Creating shell script $rstf to use to restore $1.$suffix ..."
echo '#!/bin/sh' > $rstf
echo "# shell script to use to restore $1.$suffix" >> $rstf
echo "# Created by `basename $0` `date`" >> $rstf
echo '# '`ls -l $1.$suffix`  >> $rstf
line=
glob=$prefix.*
disk_cnt=0
for i in `ls $glob` 
do
   if (test $1.$suffix = $i) then
      continue
   fi
   if (test $rstf = $i) then
      continue
   fi
   if (test $savf = $i) then
      continue
   fi
   disk_cnt=`expr $disk_cnt + 1`
   line="$line $i"
   echo "# "`ls -l $i` >> $rstf
done
echo 'sysbin=/usr/local/bin:/usr/local/gnu/bin:/bin:/usr/bin:/usr/lib' >> $rstf
echo 'otherbin=$HOME/bin:/home/f85/bynum/bin' >> $rstf
echo 'PATH=$sysbin:$otherbin:.' >> $rstf
echo 'readfile() {' >> $rstf
echo '   while (true)' >> $rstf
echo '   do' >> $rstf
echo '      echo -n "Insert floppy containing $i and press \"x\", then RETURN "' >> $rstf
echo '      read ans2' >> $rstf
echo '      case $ans2 in' >> $rstf
echo '      x) mdir a:$i >& /dev/null' >> $rstf
echo '           if (test $? !=  0) then' >> $rstf
echo '              echo "File $i is not on the floppy"' >> $rstf
echo '           else' >> $rstf
echo '              break' >> $rstf
echo '           fi;;' >> $rstf
echo '      esac' >> $rstf
echo '   done' >> $rstf
echo '}' >> $rstf
echo 'OS=`uname -s`' >> $rstf
echo "echo \"Restoring the file $1.$suffix from floppies\"" >> $rstf
echo "if (test -f $1.$suffix) then" >> $rstf
echo '   while (true)' >> $rstf
echo '   do' >> $rstf
echo "      echo -n \"The file $1.$suffix exists.  OK to overwrite? (y or n) \"" >> $rstf
echo '      read ans' >> $rstf
echo '      case $ans in' >> $rstf
echo '      Y*|y*)   break;;' >> $rstf
echo "      N*|n*)   echo \"File $1.$suffix not modified\"" >> $rstf
echo '               exit 0;;' >> $rstf
echo '      esac' >> $rstf
echo '   done' >> $rstf
echo 'fi' >> $rstf
echo "echo \"You will need $disk_cnt floppies containing the files\"" >> $rstf
echo "echo \"   $line\"" >> $rstf
echo 'echo -n "Press RETURN when you have them "' >> $rstf
echo 'read dummy' >> $rstf
echo 'firsttime=T' >> $rstf
echo "for i in $line" >> $rstf
echo 'do' >> $rstf
echo '   case $OS in' >> $rstf
echo '   Sun*) eject;;'>> $rstf
echo '   *)  case $firsttime in' >> $rstf
echo '       T) firsttime=F ;;' >> $rstf
echo '       F) echo "Remove floppy from drive" ;;' >> $rstf
echo '      esac' >>$rstf
echo '   esac' >> $rstf
echo '   if (test -f $i) then' >> $rstf
echo '      while (true)' >> $rstf
echo '      do' >> $rstf
echo '         echo -n "File $i exists. OK to overwrite? (y or n) "' >> $rstf
echo '         read ans' >> $rstf
echo '         case $ans in' >> $rstf
echo '         y*|Y*)' >> $rstf
echo '            readfile' >> $rstf
echo '            rm -f $i' >> $rstf
echo '            mcopy a:/$i . ' >> $rstf
echo '            break ;;' >> $rstf
echo '         n*|N*) echo "File $i was not overwritten"' >> $rstf
echo '                break;;' >> $rstf
echo '         *) ;;' >> $rstf
echo '         esac' >> $rstf
echo '      done' >> $rstf
echo '   else' >> $rstf
echo '      readfile' >> $rstf
echo '      mcopy a:$i .' >> $rstf
echo '   fi' >> $rstf
echo 'done' >> $rstf
echo 'case $OS in'>> $rstf
echo 'Sun*) eject;;'>> $rstf
echo '   *) echo "Remove floppy from drive" ;;' >> $rstf
echo 'esac' >> $rstf
echo "cat $line "'>'" $1.$suffix" >> $rstf
echo 'echo Original file size:'  >> $rstf
echo "echo \"`ls -l $1.$suffix`\"" >> $rstf
echo 'echo Restored file size:'  >> $rstf
echo "ls -l $1.$suffix" >> $rstf
chmod 700 $rstf
#
echo "Creating shell script $savf to use to save $1.$suffix to floppies ..."
echo '#!/bin/sh' > $savf
echo "# shell script to use to save $1.$suffix to floppies" >> $savf
echo "# Created by `basename $0` `date`" >> $savf
echo 'sysbin=/usr/local/bin:/usr/local/gnu/bin:/bin:/usr/bin:/usr/lib' >> $savf
echo 'otherbin=$HOME/bin:/home/f85/bynum/bin' >> $savf
echo 'PATH=$sysbin:$otherbin:.' >> $savf
echo '# '`ls -l $1.$suffix`  >> $savf
for i in $line
do
   echo "# "`ls -l $i` >> $savf
done
echo '# Original file size :'  >> $savf
echo "#   "`ls -l $1.$suffix` >> $savf
echo "echo \"Saving the file $1.$suffix to floppies\"" >> $savf
echo "echo \"You will need $disk_cnt floppies\"" >> $savf
echo 'echo -n "Press RETURN when you have them "' >> $savf
echo 'read dummy' >> $savf
echo 'firsttime=T' >> $savf
echo "for i in $line" >> $savf
echo 'do' >> $savf
echo '   if (test ! -f $i) then' >> $savf
echo '      echo "Can'"'"'t continue -- the file $i is missing"' >>$savf
echo '      exit' >> $savf
echo '   fi' >> $savf
echo '   case $OS in' >> $savf
echo '   Sun*) eject;;' >> $savf
echo '   *)  case $firsttime in' >> $savf
echo '       T) firsttime=F ;;' >> $savf
echo '       F) echo "Remove floppy from drive" ;;' >> $savf
echo '      esac' >>$savf
echo '   esac' >>$savf
echo '   while (true)' >> $savf
echo '   do' >> $savf
echo '      echo -n "Insert floppy to receive $i and press \"x\", then RETURN "' >>$savf
echo '      read ans' >>$savf
echo '      case $ans in' >>$savf
echo '      x) break;;' >> $savf
echo '      esac' >> $savf
echo '   done' >> $savf
echo '   mformat a: || exit'  >> $savf
echo '   mcopy $i a: || exit ' >>$savf
echo "   mcopy $rstf a: || exit" >>$savf
echo "   mcopy $savf a: || exit" >>$savf
echo '   mdir a: || exit' >> $savf
echo "done" >> $savf
echo 'case $OS in' >> $savf
echo 'Sun*) eject;;'>> $savf
echo '   *) echo "Remove floppy from drive" ;;' >> $savf
echo 'esac' >> $savf
echo "echo done" >> $savf
chmod 700 $savf
echo done

# 
# $Log: fdsplit,v $
# Revision 1.3  1999/08/01 18:49:20  bynum
# change protection of save & restore scripts from 755 to 700
#
# Revision 1.2  1999/08/01 18:47:34  bynum
# add robutsness to save and restore scripts, minor tweaks to echo strings
#
# Revision 1.1  1999/07/30 10:56:37  bynum
# Initial revision
#
#