Solution to Lab 13
------------------

1. Not really a question here.

2. The command first invoked will "wait" (i.e., hang). In this case, the
   "cat" will hang instead of the "ls" as in question 1.

3. You must first create a named pipe called 'produce-consume' before 
   executing the following scripts. The answer to the producer part is:

   #!/bin/bash
   while [ 1 != 2 ]
   do
     echo Please enter a command:
     read cmd
     echo $cmd > produce-consume
   done
   
   The answer to the consumer part is:

   #!/bin/bash
   while [ 1 != 2 ]
   do
     cmd=`cat produce-consume`
     echo Received command: $cmd
     result=`$cmd > temp 2>&1`
     cat temp
   done

4. The consumer will happily consume the commands from both producers, in
   the order in which they are sent to the pipe.

5. This is a little tricky. Only one consumer (and not both) will consume the
   command. But it may not be clear who that is apriori (i.e., it should appear
   non-deterministic).

6. First in first out. This is the manner in which stuff written into a pipe
   is read out of it.