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- <html>
- <head>
- <title>hash</title>
- <body bgcolor=#ffffff>
- <h2 align=center>hash</h2>
- <h4 align=center>OS/161 Reference Manual</h4>
- <h3>Name</h3>
- hash - compute a simple hash function of a file
- <h3>Synopsis</h3>
- /testbin/hash <em>file</em>
- <br>
- host-hash <em>file</em>
- <h3>Description</h3>
- hash takes a file and computes a hash value for it by adding all the
- bytes in the file together modulo a prime.
- <p>
- hash is by default also compiled for the System/161 host OS so you can
- cross-check the answers you get.
- <h3>Requirements</h3>
- hash uses the following system calls:
- <ul>
- <li> <A HREF=../syscall/open.html>open</A>
- <li> <A HREF=../syscall/read.html>read</A>
- <li> <A HREF=../syscall/write.html>write</A>
- <li> <A HREF=../syscall/close.html>close</A>
- <li> <A HREF=../syscall/_exit.html>_exit</A>
- </ul>
- Once the basic system calls are complete, hash should work on any file
- the system supports. However, it will probably of most use for testing
- while working on the file system assignment.
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