1: #!/usr/bin/perl
2: #
3: # The LearningOnline Network with CAPA
4: # Connect to MAXIMA CAS
5: #
6: # $Id: lonmaxima,v 1.1 2006/03/03 16:07:34 www Exp $
7: #
8: # Copyright Michigan State University Board of Trustees
9: #
10: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
11: #
12: # LON-CAPA is free software; you can redistribute it and/or modify
13: # it under the terms of the GNU General Public License as published by
14: # the Free Software Foundation; either version 2 of the License, or
15: # (at your option) any later version.
16: #
17: # LON-CAPA is distributed in the hope that it will be useful,
18: # but WITHOUT ANY WARRANTY; without even the implied warranty of
19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20: # GNU General Public License for more details.
21: #
22: # You should have received a copy of the GNU General Public License
23: # along with LON-CAPA; if not, write to the Free Software
24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25: #
26: # /home/httpd/html/adm/gpl.txt
27: #
28:
29: #
30: # http://www.lon-capa.org/
31: #
32:
33: use IPC::Open3;
34: use IO::Select;
35: # Scary: cannot use strict!!!
36: ##### use strict;
37:
38: sub maximareply {
39: my $cmd=shift;
40: my $reply='';
41: my $error='';
42: my $exitstatus='';
43:
44: unless ($cmd=~/\;\n$/) { $cmd.=";\n"; }
45: my $pid = open3($cmd_in, $cmd_out, $cmd_err, 'maxima');
46:
47: $SIG{CHLD} = sub {
48: $exitstatus="$? on $pid\n" if waitpid($pid, 0) > 0;
49: };
50:
51: print $cmd_in $cmd;
52: close $cmd_in;
53:
54: my $selector = IO::Select->new( );
55: $selector->add($cmd_err, $cmd_out);
56:
57: while (my @ready = $selector->can_read) {
58: foreach my $fh (@ready) {
59: if (fileno($fh) == fileno($cmd_err)) {
60: $error.=<$cmd_err>;
61: } else {
62: my $line = scalar <$cmd_out>;
63: if ($line=~/^(\(\%o|\s)/) {
64: $line=~s/^\(.*\)/ /;
65: $reply.=$line;
66: }
67: }
68: $selector->remove($fh) if eof($fh);
69: }
70: }
71: close $cmd_out;
72: close $cmd_err;
73: return ($reply,$error,$exitstatus);
74: }
75:
76: print join("\n----\n",&maximareply('1234'));
77: print join("\n----\n",&maximareply('x0: 5;x1: 7;integrate (x^2, x, x0, x1);'));
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