103 lines
3.5 KiB
HTML
103 lines
3.5 KiB
HTML
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<html>
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<head>
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<title>randcall</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>randcall</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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randcall - make randomized system calls
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</p>
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<h3>Synopsis</h3>
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<p>
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<tt>/testbin/randcall</tt> [<tt>-f</tt>] [<tt>-c</tt> <em>count</em>]
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[<tt>-r</tt> <em>seed</em>] <em>callset</em>
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</p>
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<h3>Description</h3>
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<p>
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<tt>randcall</tt> makes randomized system calls, that is, system calls with
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completely random arguments. The <em>callset</em> determines which
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list of system calls it uses; it is either "all", which does
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everything, or a number that identifies one of the assignments, in
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which case it exercises all the system calls that are supposed to be
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working when that assignment is complete. (If the lists compiled into
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randcall are wrong, contact your course staff.)
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</p>
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<p>
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Ordinarily, in case some of these calls cause process termination,
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randcall forks before making each call. This can be slow, so the -f
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option can be used to suppress this behavior.
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</p>
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<p>
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The <tt>-c</tt> <em>count</em> option tells randcall to make
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<em>count</em> iterations through the list of calls it's using. (It
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always goes through the list sequentially.) The default count is 100.
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</p>
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<p>
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The <tt>-r</tt> <em>seed</em> option allows one to set the
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pseudorandom seed used by <tt>randcall</tt> to generate the call
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arguments. The default seed is 0.
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</p>
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<p>
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<tt>randcall</tt> prints what it's doing, so if it blows up you should
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be able to see what happened.
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</p>
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<p>
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The system calls that do not take arguments are not on any of the call
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lists. Neither is <A HREF=../syscall/reboot.html>reboot</A>, to prevent
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accidental system shutdown.
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</p>
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<h3>Requirements</h3>
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<p>
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<tt>randcall</tt> should never under any circumstances crash the
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kernel, no matter what call list is in use.
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</p>
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<h3>Bugs</h3>
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<p>
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There should be an option to seed the random generator from
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<A HREF=../dev/random.html>random:</A>.
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</p>
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</body>
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</html>
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