Class 9: Homework

You must print this sheet out and write/type answers on it!

Fill in the kernel file I/O structures in the diagram below as they would appear after prog1 is launched via the command
```
	  bash$ ./prog1 < foo.txt > bar.txt 2> bar.txt
	
```
You may assume that the process created by this command has PID 1001.
Read section 4.14 in APUE and answer the following questions:
- What information is stored in an inode?
- What happens on the actual drive (i.e. in terms of inodes and directory blocks and data blocks) when a file is renamed?
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- Symbolic links are really useful. They allow us to define aliases for files and directories. For example, suppose I've developed the extremely useful hw utility --- ~/research/helloworldV1/hw* --- and I want to put make it available in ~/bin. If I copy hw from ~/research/helloworldV1/ into ~/bin, and then go back and recompile it later, what's in ~/bin will be out of date. So instead I define a symbolic link
```
bash$ cd ~/bin
bash$ ln ../research/helloworldV1/hw hw
```
  ... and now ~/bin/hw always refers to the current version of ~/research/helloworldV1/hw*. How are symbolic links represented (i.e. in terms of inodes and directory blocks and data blocks) on the actual drive?
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```