Shell Programming and Scripting

awk -v Items_list="ABC DEF GHI" '
   BEGIN {
      FS      = ":" ;
      Unset   = 0;
      Null    = 1;
      Valid   = 2;
      Invalid = 0;
      Items_count = split(Items_list,  Items, / /);
   }

   function initEntry (entry,    i) {
      Entry_name  = entry;
      for (i=1; i<=Items_count; i++)
         Items_state[Items[i]] = Unset;
   }

   function printEntry (    i, e_state, i_state, err, errors) {
      if (! Entry_name) return;
      e_state = Valid;
      for (i=1; i<=Items_count; i++) {
         i_state = Items_state[Items[i]];
         if (i_state != Valid) {
            err    = "     " (i_state == Unset ? "Unset: " : "Null : ") Items[i];
            errors = errors (e_state == Invalid ? "\n" : "") err;
            e_state = Invalid;
         }
      }
      if (e_state == Valid) 
         print "Ok :", Entry_name;
      else {
         print "Err:", Entry_name;
         print errors;
      }
   }

   /^entry-id/ {
      printEntry();
      initEntry($0);
      next;
   }

   {
      gsub(/[[:space:]]/, "", $1);
      gsub(/[[:space:]]/, "", $2);
      if ($1 && $1 in Items_state) {
         Items_state[$1] = ($2 ? Valid : Null);
      }
   }

   END {
      printEntry();
   }
' infile

entry-id 1

ABC : value
DEF :value
GHI :VALUE

entry-id 2

DEF :value
GHI :VALUE

entry-id 3
ABC : value
DEF :
GHI :VALUE

entry-id 4
ABC : value
DEF :

entry-id 5

ABC : value
DEF :value
GHI :VALUE

Ok : entry-id 1
Err: entry-id 2
     Unset: ABC
Err: entry-id 3
     Null : DEF
Err: entry-id 4
     Null : DEF
     Unset: GHI
Ok : entry-id 5