96 lines
3.2 KiB
HTML
96 lines
3.2 KiB
HTML
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Copyright (c) 2015
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The President and Fellows of Harvard College.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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may be used to endorse or promote products derived from this software
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THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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-->
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<html>
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<head>
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<title>redirect</title>
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<link rel="stylesheet" type="text/css" media="all" href="../man.css">
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</head>
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<body bgcolor=#ffffff>
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<h2 align=center>redirect</h2>
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<h4 align=center>OS/161 Reference Manual</h4>
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<h3>Name</h3>
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<p>
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redirect - test I/O redirection
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</p>
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<h3>Synopsis</h3>
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<p>
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<tt>/testbin/redirect</tt>
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</p>
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<h3>Description</h3>
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<p>
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<tt>redirect</tt> does a simple test of I/O redirection like a Unix
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shell might do.
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It first creates an input test file, then invokes
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<A HREF=../bin/cat.html>cat</A> to copy it, with standard input and
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standard output suitably redirected.
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Then it checks that the copy happened correctly, and removes the test
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files.
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</p>
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<p>
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The specifications of Unix system calls are such that this program
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should take no extra work to support once basic tests show that the
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pieces are working.
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</p>
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<h3>Requirements</h3>
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<p>
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<tt>redirect</tt> uses the following system calls:
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<ul>
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<li><A HREF=../syscall/open.html>open</A></li>
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<li><A HREF=../syscall/dup2.html>dup2</A></li>
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<li><A HREF=../syscall/read.html>read</A></li>
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<li><A HREF=../syscall/write.html>write</A></li>
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<li><A HREF=../syscall/close.html>close</A></li>
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<li><A HREF=../syscall/remove.html>remove</A></li>
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<li><A HREF=../syscall/fork.html>fork</A></li>
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<li><A HREF=../syscall/execv.html>execv</A></li>
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<li><A HREF=../syscall/waitpid.html>waitpid</A></li>
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<li><A HREF=../syscall/_exit.html>_exit</A></li>
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</ul>
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</p>
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<p>
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<tt>redirect</tt> should work once you have implemented the basic
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system calls, including fork, exec, and wait.
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</p>
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<p>
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Note that until you implement remove (which is typically not part of
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the basic system calls assignment), and in any case on emufs, the test
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files will not get removed.
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This is not important, just untidy.
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</p>
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</body>
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</html>
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