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Infinite loop not looping

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# 1  
Old 03-23-2009
Infinite loop not looping
Hi guys, I'm having a problem getting my infinite loop to loop. It simply reads in the users choice form the menu, executes the corresponding case statement and quits instead of looping back to the main menu again. I have a feeling it might be something with my if then statements within the case statements. Sorry for the long code but here it is. It was done with C shell and everything works great, I just need it to have an infinite loop until user chooses 4 from the menu, in which case the loop ends. Thanks.
Code:
set num = 1
while ($num == 1)
echo "   What would you like to do?"
echo " "
echo "        1 => Install Files"
echo "        2 => Restore Original Files"
echo "        3 => Load File from Backup Folder"
echo "        4 => Exit"
echo " "
set ANSWER=$<
#
# Install Files
# Determine whether a CD or floppy disk was inserted, then proceed to 
# according tasks 
#
switch ($ANSWER)
   case 1:
      if (! -d FILES_BACKUP) then                          
      
         mkdir FILES_BACKUP
        
         if (-f ../cdrom/FILES.tgz) then    
         
            cp -r ../cdrom/FILES.tgz  FILES_BACKUP      
      
         else if (-f ../dev/FILES.tgz) then      
      
            cp -r ../dev/FILES.tgz FILES_BACKUP         
      
         else
      
            echo "====INSERT CD OR FLOPPY DISK===="
          
         endif
              
         cd FILES_BACKUP
         tar xvf FILES.tgz
         mv FILES FILES.1
         rm FILES.tgz
         echo "Installed files successfully"
         echo " "
         echo "   Run as current file [Y or N]?"
         echo " "
   
         set CURRENT=$<
         if ($CURRENT == Y) then            
          
            mv ../FILES FILES.QA   
            cp -r FILES.1 ../FILES
            echo "Current files updated with new file" 
      
         else if ($CURRENT == N) then 
      
            echo "Files have been saved"
         
         else
      
            echo "Bad command"
        
         endif      
      
      
      else if (-d FILES_BACKUP) then
           
         if (-f ../cdrom/FILES.tgz) then
     
            cp -r ../cdrom/FILES.tgz FILES_BACKUP
         
         else if (-f ../dev/FILES.tgz) then
      
            cp -r ../dev/FILES.tgz FILES_BACKUP  
         
         else
         
            echo "====INSERT CD OR FLOPPY DISK===="      
                 
         endif
      
         cd FILES_BACKUP
         tar xvf FILES.tgz
                          
         if (! -d FILES.1) then
         
            mv FILES FILES.1
            rm FILES.tgz
            echo "Installed files from floppy disk successfully"
            echo " "
            echo "   Run as current file [Y or N]?"
            echo " "
   
            set CURRENT=$<
   
            if ($CURRENT == Y) then
            
               mv ../FILES FILES.QA   
               cp -r FILES.1 ../FILES
               echo "Current files updated with new file" 
   
            else if ($CURRENT == N) then 
      
               echo "Files have been saved"
           
            else
         
               echo "Bad command"
            
            endif
 
         else
         
            set i = 1
         
            while (-e "FILES."$i) 
               
               @ i = ($i + 1)
                          
            end
            
            mkdir "FILES."$i
            mv FILES/* "FILES."$i        
            rm -r FILES
            rm FILES.tgz
            echo "Installed files from floppy disk successfully"
            echo " "
            echo "   Run as current file [Y or N]?"
            echo " "
   
            set CURRENT=$<
    
            if ($CURRENT == Y) then
            
               if (-e FILES.QA/) then
            
                  rm -r ../FILES
                  cp -r FILES.$i ../FILES
                  echo "Current files updated with new file"
            
               else
            
                  mkdir FILES.QA
                  mv ../FILES/* FILES.QA   
                  cp -r FILES.$i/* ../FILES
                  echo "Current files updated with new file" 
            
               endif
         
            else if ($CURRENT == N) then
      
               echo "Files have been saved"
            else
         
               echo "Bad command"
         
            endif
         
         endif
    
      endif   
   
   breaksw
#
# Restore Files
# Move contents of "/FILES.QA" back to the original "/FILES" folder
# and delete all temporary folders and files if user chooses.
#
   case 2:
             
      echo " "
      echo "   Would you like to delete all backup files [Y or N]?"
      echo " "
      
      set BACKUP=$<
      
      if ($BACKUP == Y) then
      
         if (-e FILES_BACKUP) then
                  
            if (-e FILES_BACKUP/FILES.QA) then
         
               rm -r FILES
               cp -r FILES_BACKUP/FILES.QA FILES
               rm -r FILES_BACKUP
         
            else
         
               rm -r FILES_BACKUP
            
            endif   
            echo "Backup files removed"
         
         else
         
            echo "Backup files have already been removed"
      
         endif
            
      else if ($BACKUP == N) then 
      
         if (-e FILES_BACKUP) then
         
            if (-e FILES_BACKUP/FILES.QA) then
         
               rm -r FILES     
               cp -r FILES_BACKUP/FILES.QA FILES
               echo "Backup files saved"
         
            endif
                       
         else
      
            echo "There are no backup files to save"
         
         endif   
   
      else
   
         echo "Bad command"
            
      endif
         
      if (-f FILES.tgz) then
   
         rm FILES.tgz
 
      endif
   
   breaksw
   
#
# Load Files from Backup folder
# Prompts user to select file from backup folder to load as the current file
#
   case 3:
       
      if (-e FILES_BACKUP) then
   
         echo " "
         echo "   Which file would you like to load?:"
         echo " "
         ls FILES_BACKUP
         echo " "
   
         set BACKUP=$<
   
         while (! -e FILES_BACKUP/$BACKUP)
      
            echo "That file doesn't exist, Enter filename [9 to exit]: "
            set BACKUP=$<   
    
            if ($BACKUP == 9) then
           
               exit
         
            endif
   
         end            
   
      else
   
         echo "There are no backup files to load"
      
      endif   
   
      rm -r FILES
      cp -r FILES_BACKUP/$BACKUP FILES      
      echo "Files loaded successfully"
   
   breaksw
      
   case 4:           
      
      @ num = ($num + 1)
   
   breaksw
     
   default:
      
      echo "Bad command"
      
   breaksw
   
endsw
end

# 2  
Old 03-23-2009
One thing I've noticed that's helped me in the past with loops and other scripts. Add a lot of echo lines so you know where the code is getting to, and also add in some counters so you know if it fails the first time, second time, etc...
# 3  
Old 03-23-2009
hootdocta5,

Your script works for me.
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