Delete lab2/src/moss.pl
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lab2/src/moss.pl
358
lab2/src/moss.pl
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#!/usr/bin/env perl
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#
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# Please read all the comments down to the line that says "STOP".
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# These comments are divided into three sections:
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#
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# 1. usage instructions
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# 2. installation instructions
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# 3. standard copyright
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#
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# Feel free to share this script with other instructors of programming
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# classes, but please do not place the script in a publicly accessible
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# place. Comments, questions, and bug reports should be sent to
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# moss-request@moss.stanford.edu.
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#
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# IMPORTANT: This script is known to work on Unix and on Windows using Cygwin.
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# It is not known to work on other ways of using Perl under Windows. If the
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# script does not work for you under Windows, you can try the email-based
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# version for Windows (available on the Moss home page).
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#
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#
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# Section 1. Usage instructions
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#
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# moss [-l language] [-d] [-b basefile1] ... [-b basefilen] [-m #] [-c "string"] file1 file2 file3 ...
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#
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# The -l option specifies the source language of the tested programs.
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# Moss supports many different languages; see the variable "languages" below for the
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# full list.
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#
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# Example: Compare the lisp programs foo.lisp and bar.lisp:
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#
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# moss -l lisp foo.lisp bar.lisp
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#
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#
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# The -d option specifies that submissions are by directory, not by file.
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# That is, files in a directory are taken to be part of the same program,
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# and reported matches are organized accordingly by directory.
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#
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# Example: Compare the programs foo and bar, which consist of .c and .h
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# files in the directories foo and bar respectively.
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#
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# moss -d foo/*.c foo/*.h bar/*.c bar/*.h
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#
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# Example: Each program consists of the *.c and *.h files in a directory under
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# the directory "assignment1."
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#
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# moss -d assignment1/*/*.h assignment1/*/*.c
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#
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#
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# The -b option names a "base file". Moss normally reports all code
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# that matches in pairs of files. When a base file is supplied,
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# program code that also appears in the base file is not counted in matches.
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# A typical base file will include, for example, the instructor-supplied
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# code for an assignment. Multiple -b options are allowed. You should
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# use a base file if it is convenient; base files improve results, but
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# are not usually necessary for obtaining useful information.
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#
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# IMPORTANT: Unlike previous versions of moss, the -b option *always*
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# takes a single filename, even if the -d option is also used.
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#
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# Examples:
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#
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# Submit all of the C++ files in the current directory, using skeleton.cc
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# as the base file:
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#
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# moss -l cc -b skeleton.cc *.cc
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#
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# Submit all of the ML programs in directories asn1.96/* and asn1.97/*, where
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# asn1.97/instructor/example.ml and asn1.96/instructor/example.ml contain the base files.
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#
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# moss -l ml -b asn1.97/instructor/example.ml -b asn1.96/instructor/example.ml -d asn1.97/*/*.ml asn1.96/*/*.ml
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#
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# The -m option sets the maximum number of times a given passage may appear
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# before it is ignored. A passage of code that appears in many programs
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# is probably legitimate sharing and not the result of plagiarism. With -m N,
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# any passage appearing in more than N programs is treated as if it appeared in
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# a base file (i.e., it is never reported). Option -m can be used to control
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# moss' sensitivity. With -m 2, moss reports only passages that appear
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# in exactly two programs. If one expects many very similar solutions
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# (e.g., the short first assignments typical of introductory programming
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# courses) then using -m 3 or -m 4 is a good way to eliminate all but
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# truly unusual matches between programs while still being able to detect
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# 3-way or 4-way plagiarism. With -m 1000000 (or any very
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# large number), moss reports all matches, no matter how often they appear.
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# The -m setting is most useful for large assignments where one also a base file
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# expected to hold all legitimately shared code. The default for -m is 10.
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#
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# Examples:
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#
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# moss -l pascal -m 2 *.pascal
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# moss -l cc -m 1000000 -b mycode.cc asn1/*.cc
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#
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#
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# The -c option supplies a comment string that is attached to the generated
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# report. This option facilitates matching queries submitted with replies
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# received, especially when several queries are submitted at once.
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#
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# Example:
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#
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# moss -l scheme -c "Scheme programs" *.sch
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#
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# The -n option determines the number of matching files to show in the results.
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# The default is 250.
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#
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# Example:
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# moss -c java -n 200 *.java
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# The -x option sends queries to the current experimental version of the server.
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# The experimental server has the most recent Moss features and is also usually
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# less stable (read: may have more bugs).
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#
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# Example:
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#
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# moss -x -l ml *.ml
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#
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#
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# Section 2. Installation instructions.
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#
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# You may need to change the very first line of this script
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# if perl is not in /usr/bin on your system. Just replace /usr/bin
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# with the pathname of the directory where perl resides.
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#
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#
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# 3. Standard Copyright
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#
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#Copyright (c) 1997 The Regents of the University of California.
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#All rights reserved.
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#
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#Permission to use, copy, modify, and distribute this software for any
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#purpose, without fee, and without written agreement is hereby granted,
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#provided that the above copyright notice and the following two
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#paragraphs appear in all copies of this software.
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#
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#IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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#DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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#OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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#CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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#INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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#AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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#ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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#PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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#
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#
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# STOP. It should not be necessary to change anything below this line
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# to use the script.
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#
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use IO::Socket;
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#
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# As of the date this script was written, the following languages were supported. This script will work with
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# languages added later however. Check the moss website for the full list of supported languages.
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#
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@languages = ("c", "cc", "java", "ml", "pascal", "ada", "lisp", "scheme", "haskell", "fortran", "ascii", "vhdl", "perl", "matlab", "python", "mips", "prolog", "spice", "vb", "csharp", "modula2", "a8086", "javascript", "plsql");
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$server = 'moss.stanford.edu';
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$port = '7690';
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$noreq = "Request not sent.";
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$usage = "usage: moss [-x] [-l language] [-d] [-b basefile1] ... [-b basefilen] [-m #] [-c \"string\"] file1 file2 file3 ...";
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#
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# The userid is used to authenticate your queries to the server; don't change it!
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#
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$userid=717747575;
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#
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# Process the command line options. This is done in a non-standard
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# way to allow multiple -b's.
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#
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$opt_l = "c"; # default language is c
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$opt_m = 10;
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$opt_d = 0;
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$opt_x = 0;
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$opt_c = "";
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$opt_n = 250;
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$bindex = 0; # this becomes non-zero if we have any base files
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while (@ARGV && ($_ = $ARGV[0]) =~ /^-(.)(.*)/) {
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($first,$rest) = ($1,$2);
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shift(@ARGV);
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if ($first eq "d") {
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$opt_d = 1;
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next;
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}
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if ($first eq "b") {
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if($rest eq '') {
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die "No argument for option -b.\n" unless @ARGV;
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$rest = shift(@ARGV);
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}
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$opt_b[$bindex++] = $rest;
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next;
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}
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if ($first eq "l") {
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if ($rest eq '') {
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die "No argument for option -l.\n" unless @ARGV;
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$rest = shift(@ARGV);
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}
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$opt_l = $rest;
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next;
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}
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if ($first eq "m") {
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if($rest eq '') {
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die "No argument for option -m.\n" unless @ARGV;
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$rest = shift(@ARGV);
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}
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$opt_m = $rest;
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next;
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}
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if ($first eq "c") {
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if($rest eq '') {
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die "No argument for option -c.\n" unless @ARGV;
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$rest = shift(@ARGV);
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}
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$opt_c = $rest;
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next;
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}
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if ($first eq "n") {
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if($rest eq '') {
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die "No argument for option -n.\n" unless @ARGV;
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$rest = shift(@ARGV);
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}
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$opt_n = $rest;
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next;
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}
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if ($first eq "x") {
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$opt_x = 1;
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next;
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}
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#
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# Override the name of the server. This is used for testing this script.
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#
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if ($first eq "s") {
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$server = shift(@ARGV);
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next;
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}
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#
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# Override the port. This is used for testing this script.
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#
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if ($first eq "p") {
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$port = shift(@ARGV);
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next;
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}
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die "Unrecognized option -$first. $usage\n";
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}
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#
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# Check a bunch of things first to ensure that the
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# script will be able to run to completion.
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#
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#
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# Make sure all the argument files exist and are readable.
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#
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print "Checking files . . . \n";
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$i = 0;
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while($i < $bindex)
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{
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die "Base file $opt_b[$i] does not exist. $noreq\n" unless -e "$opt_b[$i]";
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die "Base file $opt_b[$i] is not readable. $noreq\n" unless -r "$opt_b[$i]";
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die "Base file $opt_b is not a text file. $noreq\n" unless -T "$opt_b[$i]";
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$i++;
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}
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foreach $file (@ARGV)
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{
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die "File $file does not exist. $noreq\n" unless -e "$file";
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die "File $file is not readable. $noreq\n" unless -r "$file";
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die "File $file is not a text file. $noreq\n" unless -T "$file";
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}
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if ("@ARGV" eq '') {
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die "No files submitted.\n $usage";
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}
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print "OK\n";
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#
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# Now the real processing begins.
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#
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$sock = new IO::Socket::INET (
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PeerAddr => $server,
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PeerPort => $port,
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Proto => 'tcp',
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);
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die "Could not connect to server $server: $!\n" unless $sock;
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$sock->autoflush(1);
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sub read_from_server {
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$msg = <$sock>;
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print $msg;
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}
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sub upload_file {
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local ($file, $id, $lang) = @_;
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#
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# The stat function does not seem to give correct filesizes on windows, so
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# we compute the size here via brute force.
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#
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open(F,$file);
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$size = 0;
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while (<F>) {
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$size += length($_);
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}
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close(F);
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print "Uploading $file ...";
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print $sock "file $id $lang $size $file\n";
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open(F,$file);
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while (<F>) {
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print $sock $_;
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}
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close(F);
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print "done.\n";
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}
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print $sock "moss $userid\n"; # authenticate user
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print $sock "directory $opt_d\n";
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print $sock "X $opt_x\n";
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print $sock "maxmatches $opt_m\n";
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print $sock "show $opt_n\n";
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#
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# confirm that we have a supported languages
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#
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print $sock "language $opt_l\n";
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$msg = <$sock>;
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chop($msg);
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if ($msg eq "no") {
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print $sock "end\n";
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die "Unrecognized language $opt_l.";
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}
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# upload any base files
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$i = 0;
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while($i < $bindex) {
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&upload_file($opt_b[$i++],0,$opt_l);
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}
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$setid = 1;
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foreach $file (@ARGV) {
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&upload_file($file,$setid++,$opt_l);
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}
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print $sock "query 0 $opt_c\n";
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print "Query submitted. Waiting for the server's response.\n";
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&read_from_server();
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print $sock "end\n";
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close($sock);
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