Shell Programming and Scripting

Can any one tell me the meaning of the following.. I am still learnig unix
Thanks in advance

1)

Code:

 if ($1 == "tommCumulative)") 
   { 
      if (PID == 7)
      {
         printf(",CUM_READ = to_number(%d,'XXXXXXXXXX')\n",$2 * SC)
      }
      else
      {
         printf (",CUM_READ = %d\n",$2 * SC) 
      }
   }

2)

Code:

Protocol_id=`grep txOnlyProtocolID $remoteTmpOndDir/ond.tmp.$1 | awk '{print $6}'`

3)

Code:

nawk -f $BIN_DIR/odr_crupdt.awk SC=$SCALING_CONST INT=$DEMAND_INTRVL PID=$Protocol_id $remoteTmpOndDir/ond.info.$1 >> updt_ond_$1.sql

We need some context. What are these from?

there is a awk script called "odr_crupdt.awk" in which i have the following command.
1) if ($1 == "tommCumulative)")
{
if (PID == 7)
{
printf(",CUM_READ = to_number(%d,'XXXXXXXXXX')\n",$2 * SC)
}
else
{
printf (",CUM_READ = %d\n",$2 * SC)
}
}


that is beingcalled under get_odr.sh in the following way. On line 3 you see "odr_crupdt.awk" being called. and I want to know meaning of line 2 also

line 2) Protocol_id=`grep txOnlyProtocolID $remoteTmpOndDir/ond.tmp.$1 | awk '{print $6}'`
line 3) nawk -f $BIN_DIR/odr_crupdt.awk SC=$SCALING_CONST INT=$DEMAND_INTRVL PID=$Protocol_id $remoteTmpOndDir/ond.info.$1 >> updt_ond_$1.sql

You've still given no context, so I can't explain why they're doing what they do.

I don't know what that "PID" variable is. It must have been set somewhere else. I don't know what SC is either. I also don't know why they're checking for 7, or what tommcumulative is.

All I can tell you is, it's doing this: "if the first token is tommcumulative, and the PID is 7, print the string ",CUM_READ = to_number(%d,'XXXXXXXXXX')\n", substituting the second token times SC for %d. Otherwise, print ",CUM_READ = %d\n", substituting the second token times SC for %d. And if the first token isn't tommcumulative, don't do anything inside this block at all."

In the second line, they're matching lines containing the text "txOnlyProtocolID" from the file $remoteTmpOnDir/ond.tmp.$1. I don't know what $remoteTmpOnDir is, that must have been set earlier. I don't know what $1 is, that's the first parameter of the script. And they feed the output through awk, printing only the sixth field, and shoehorn the whole mess into the Protocol_id variable.
Protocol_id=`grep txOnlyProtocolID $remoteTmpOndDir/ond.tmp.$1 | awk '{print $6}'`

For the third one, they're running the awk script $BIN_DIR/odr_crupdt.awk. I don't know what BIN_DIR is, that's something that's set earlier. They're presetting a whole bunch of variables in there, some of which correspond to variables used earlier, like SC=$SCALING_CONST and INT=$DEMAND_INTRVL, and of course that PID variable that got grepped out of that file, whatever it is. What they are and why I couldn't say. What $1 is I also couldn't say.

First Let me thank you very much for your reply, That pretty much made me understood what it is doing and why it is doing. There is whole bunch of unix shell script, that is the reason why I could not attach all that. like you mentioned those dir are alredy set up..

Regards
RP