Shell Programming and Scripting

 
#! /bin/csh
set umr=UMR
set fd1=a
set fd2=b
set ext1=1.txt
set ext2=2.txt
set ext=.txt
#foreach  i ( `ls`)
foreach  i ( *)
   set file_nm=$i
   set bh_nm=`echo $file_nm | cut -d"_" -f2`
      
   
   
      if("$bh_nm" != "$umr") then 
             
       set bh_ext=`echo $file_nm | cut -d"_" -f4`
       set bh_num_nm="$bh_nm$bh_ext$fd1$ext"
       mv $file_nm  $bh_num_nm
      
     
    else if ("$bh_nm" == "$umr") then
     set um_ext=`echo $file_nm | cut -d"_" -f5`
         set umr_bh=`echo $file_nm | cut -d"_" -f3` 
               if ("$um_ext" == "$ext1") then 
                  set um_ext_new_1=1
                  
                  set umr_nm_1= "$umr_bh$um_ext_new_1$fd2$ext"
                  mv $file_nm  $umr_nm_1
               else if ("$um_ext" == "$ext2") then
                  set um_ext_new_2=2
                  set umr_nm_2= "$umr_bh$um_ext_new_2$fd2$ext"
                  mv $file_nm  $umr_nm_2
               endif
      
      endif
end