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Simple find assignment

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Frans Kaashoek 2019-07-24 18:00:32 -04:00
parent 9a817bd134
commit 61dc67b5d2
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@ -144,18 +144,29 @@ initial file system. You just ran one of them: <tt>ls</tt>.
<h2>find</h2> <h2>find</h2>
<p>Write a simple version of the UNIX find program: find all the files <p>Write a simple version of the UNIX find program: find all the files
in a directory tree that contain a user-specified string. in a directory tree whose name matches a string. For example if the
file system contains a file <tt>a/b</tt>, then running find as
follows should produce:
<pre>
$ find . b
./a/b
$
</pre>
<p>Some hints: <p>Some hints:
<ul> <ul>
<li>Look at user/ls.c to see how to read directories. <li>Look at user/ls.c to see how to read directories.
</ul> <li>Use recursion to run find in sub-directories.
<li>Don't recurse into "." and "..".
</ul>
<h2>Optional: modify shell</h2> <h2>Optional: modify the shell</h2>
<p>Modify the shell to support lists of commands, separated by ";" <p>Modify the shell to support lists of commands, separated by ";"
<p>Modify the shell to support sub-shells by implementing "(" and ")" <p>Modify the shell to support sub-shells by implementing "(" and ")"
<p>Modify the shell to allow users to edit the command line
</body> </body>
</html> </html>