1: # The LearningOnline Network
2: # Login Screen
3: #
4: # $Id: lonlogin.pm,v 1.139 2010/08/22 21:51:11 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonlogin;
30:
31: use strict;
32: use Apache::Constants qw(:common);
33: use Apache::File ();
34: use Apache::lonnet;
35: use Apache::loncommon();
36: use Apache::lonauth();
37: use Apache::lonlocal;
38: use Apache::migrateuser();
39: use lib '/home/httpd/lib/perl/';
40: use LONCAPA;
41:
42: sub handler {
43: my $r = shift;
44:
45: &Apache::loncommon::get_unprocessed_cgi
46: (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
47: $ENV{'REDIRECT_QUERY_STRING'}),
48: ['interface','username','domain','firsturl','localpath','localres',
49: 'token','role','symb']);
50: if (!defined($env{'form.firsturl'})) {
51: &Apache::lonacc::get_posted_cgi($r,['firsturl']);
52: }
53:
54: # -- check if they are a migrating user
55: if (defined($env{'form.token'})) {
56: return &Apache::migrateuser::handler($r);
57: }
58:
59: &Apache::loncommon::no_cache($r);
60: &Apache::lonlocal::get_language_handle($r);
61: &Apache::loncommon::content_type($r,'text/html');
62: $r->send_http_header;
63: return OK if $r->header_only;
64:
65:
66: # Are we re-routing?
67: if (-e '/home/httpd/html/lon-status/reroute.txt') {
68: &Apache::lonauth::reroute($r);
69: return OK;
70: }
71:
72:
73: # -------------------------------- Prevent users from attempting to login twice
74: my $handle = &Apache::lonnet::check_for_valid_session($r);
75: if ($handle ne '') {
76: my $lonidsdir=$r->dir_config('lonIDsDir');
77: if ($handle=~/^publicuser\_/) {
78: # For "public user" - remove it, we apparently really want to login
79: unlink($r->dir_config('lonIDsDir')."/$handle.id");
80: } else {
81: # Indeed, a valid token is found
82: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
83: my $start_page =
84: &Apache::loncommon::start_page('Already logged in');
85: my $end_page =
86: &Apache::loncommon::end_page();
87: my $dest = '/adm/roles';
88: if ($env{'form.firsturl'} ne '') {
89: $dest = $env{'form.firsturl'};
90: }
91: $r->print(
92: $start_page
93: .'<h1>'.&mt('You are already logged in!').'</h1>'
94: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
95: '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
96: .$end_page
97: );
98: return OK;
99: }
100: }
101:
102: # ---------------------------------------------------- No valid token, continue
103:
104: # ---------------------------- Not possible to really login to domain "public"
105: if ($env{'form.domain'} eq 'public') {
106: $env{'form.domain'}='';
107: $env{'form.username'}='';
108: }
109: # ----------------------------------------------------------- Process Interface
110: $env{'form.interface'}=~s/\W//g;
111:
112: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
113:
114: my $iconpath=
115: &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
116:
117: my $lonhost = $r->dir_config('lonHostID');
118: my $domain = &Apache::lonnet::default_login_domain();
119: if ($lonhost ne '') {
120: my $redirect = &check_loginvia($domain,$lonhost);
121: if ($redirect) {
122: $r->print($redirect);
123: return OK;
124: }
125: }
126:
127: if (($env{'form.domain'}) &&
128: (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
129: $domain=$env{'form.domain'};
130: }
131: my $role = $r->dir_config('lonRole');
132: my $loadlim = $r->dir_config('lonLoadLim');
133: my $servadm = $r->dir_config('lonAdmEMail');
134: my $tabdir = $r->dir_config('lonTabDir');
135: my $include = $r->dir_config('lonIncludes');
136: my $expire = $r->dir_config('lonExpire');
137: my $version = $r->dir_config('lonVersion');
138: my $host_name = &Apache::lonnet::hostname($lonhost);
139:
140: # --------------------------------------------- Default values for login fields
141:
142: my $authusername=($env{'form.username'}?$env{'form.username'}:'');
143: my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
144:
145: # ---------------------------------------------------------- Determine own load
146: my $loadavg;
147: {
148: my $loadfile=Apache::File->new('/proc/loadavg');
149: $loadavg=<$loadfile>;
150: }
151: $loadavg =~ s/\s.*//g;
152: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
153: my $userloadpercent=&Apache::lonnet::userload();
154:
155: # ------------------------------------------------------- Do the load balancing
156: my $otherserver= &Apache::lonnet::absolute_url($host_name);
157: my $firsturl=
158: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
159: # ---------------------------------------------------------- Are we overloaded?
160: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
161: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
162: if ($unloaded) { $otherserver=$unloaded; }
163: }
164:
165: # ----------------------------------------------------------- Get announcements
166: my $announcements=&Apache::lonnet::getannounce();
167: # -------------------------------------------------------- Set login parameters
168:
169: my @hexstr=('0','1','2','3','4','5','6','7',
170: '8','9','a','b','c','d','e','f');
171: my $lkey='';
172: for (0..7) {
173: $lkey.=$hexstr[rand(15)];
174: }
175:
176: my $ukey='';
177: for (0..7) {
178: $ukey.=$hexstr[rand(15)];
179: }
180:
181: my $lextkey=hex($lkey);
182: if ($lextkey>2147483647) { $lextkey-=4294967296; }
183:
184: my $uextkey=hex($ukey);
185: if ($uextkey>2147483647) { $uextkey-=4294967296; }
186:
187: # -------------------------------------------------------- Store away log token
188: my $tokenextras;
189: if ($env{'form.role'}) {
190: $tokenextras = '&role='.&escape($env{'form.role'});
191: }
192: if ($env{'form.symb'}) {
193: if (!$tokenextras) {
194: $tokenextras = '&';
195: }
196: $tokenextras .= '&symb='.&escape($env{'form.symb'});
197: }
198: my $logtoken=Apache::lonnet::reply(
199: 'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
200: $lonhost);
201:
202: # ------------------- If we cannot talk to ourselves, we are in serious trouble
203:
204: if ($logtoken eq 'con_lost') {
205: my $spares='';
206: my $last;
207: foreach my $hostid (sort
208: {
209: &Apache::lonnet::hostname($a) cmp
210: &Apache::lonnet::hostname($b);
211: }
212: keys(%Apache::lonnet::spareid)) {
213: next if ($hostid eq $lonhost);
214: my $hostname = &Apache::lonnet::hostname($hostid);
215: next if ($last eq $hostname);
216: $spares.='<br /><font size="+1"><a href="http://'.
217: $hostname.
218: '/adm/login?domain='.$authdomain.'">'.
219: $hostname.'</a>'.
220: ' '.&mt('(preferred)').'</font>'.$/;
221: $last=$hostname;
222: }
223: $spares.= '<br />';
224: my %all_hostnames = &Apache::lonnet::all_hostnames();
225: foreach my $hostid (sort
226: {
227: &Apache::lonnet::hostname($a) cmp
228: &Apache::lonnet::hostname($b);
229: }
230: keys(%all_hostnames)) {
231: next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
232: my $hostname = &Apache::lonnet::hostname($hostid);
233: next if ($last eq $hostname);
234: $spares.='<br /><a href="http://'.
235: $hostname.
236: '/adm/login?domain='.$authdomain.'">'.
237: $hostname.'</a>';
238: $last=$hostname;
239: }
240: $r->print(
241: '<html>'
242: .'<head><title>'
243: .&mt('The LearningOnline Network with CAPA')
244: .'</title></head>'
245: .'<body bgcolor="#FFFFFF">'
246: .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
247: .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
248: .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>'
249: .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>'
250: .$spares
251: .'</body>'
252: .'</html>'
253: );
254: return OK;
255: }
256:
257: # ----------------------------------------------- Apparently we are in business
258: $servadm=~s/\,/\<br \/\>/g;
259:
260: # ----------------------------------------------------------- Front page design
261: my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
262: my $font=&Apache::loncommon::designparm('login.font',$domain);
263: my $link=&Apache::loncommon::designparm('login.link',$domain);
264: my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
265: my $alink=&Apache::loncommon::designparm('login.alink',$domain);
266: my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
267: my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
268: my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
269: my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
270: my $logo=&Apache::loncommon::designparm('login.logo',$domain);
271: my $img=&Apache::loncommon::designparm('login.img',$domain);
272: my $domainlogo='<div>'.&Apache::loncommon::domainlogo($domain).'</div>';
273: my $showbanner = 1;
274: my $showmainlogo = 1;
275: if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
276: $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
277: }
278: if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
279: $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
280: }
281: my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
282: my $showcoursecat =
283: &Apache::loncommon::designparm('login.coursecatalog',$domain);
284: my $shownewuserlink =
285: &Apache::loncommon::designparm('login.newuser',$domain);
286: my $now=time;
287: my $js = (<<ENDSCRIPT);
288:
289: <script type="text/javascript" language="JavaScript">
290: // <![CDATA[
291: function send()
292: {
293: this.document.server.elements.uname.value
294: =this.document.client.elements.uname.value;
295:
296: this.document.server.elements.udom.value
297: =this.document.client.elements.udom.value;
298:
299: uextkey=this.document.client.elements.uextkey.value;
300: lextkey=this.document.client.elements.lextkey.value;
301: initkeys();
302:
303: this.document.server.elements.upass0.value
304: =crypted(this.document.client.elements.upass$now.value.substr(0,15));
305: this.document.server.elements.upass1.value
306: =crypted(this.document.client.elements.upass$now.value.substr(15,15));
307: this.document.server.elements.upass2.value
308: =crypted(this.document.client.elements.upass$now.value.substr(30,15));
309:
310: this.document.client.elements.uname.value='';
311: this.document.client.elements.upass$now.value='';
312:
313: this.document.server.submit();
314: return false;
315: }
316:
317: function enableInput() {
318: this.document.client.elements.upass$now.removeAttribute("readonly");
319: this.document.client.elements.uname.removeAttribute("readonly");
320: this.document.client.elements.udom.removeAttribute("readonly");
321: return;
322: }
323:
324: // ]]>
325: </script>
326:
327: ENDSCRIPT
328:
329: # --------------------------------------------------- Print login screen header
330:
331: my %add_entries = (
332: bgcolor => "$mainbg",
333: text => "$font",
334: link => "$link",
335: vlink => "$vlink",
336: alink => "$alink",
337: onload => 'javascript:enableInput();',);
338:
339: $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
340: { 'redirect' => [$expire,'/adm/roles'],
341: 'add_entries' => \%add_entries,
342: 'only_body' => 1,}));
343:
344: # ----------------------------------------------------------------------- Texts
345:
346: my %lt=&Apache::lonlocal::texthash(
347: 'un' => 'Username',
348: 'pw' => 'Password',
349: 'dom' => 'Domain',
350: 'perc' => 'percent',
351: 'load' => 'Server Load',
352: 'userload' => 'User Load',
353: 'catalog' => 'Course/Community Catalog',
354: 'log' => 'Log in',
355: 'help' => 'Log-in Help',
356: 'serv' => 'Server',
357: 'servadm' => 'Server Administration',
358: 'helpdesk' => 'Contact Helpdesk',
359: 'forgotpw' => 'Forgot password?',
360: 'newuser' => 'New User?',
361: );
362: # -------------------------------------------------- Change password field name
363:
364: my $forgotpw = &forgotpwdisplay(%lt);
365: $forgotpw .= '<br />' if $forgotpw;
366: my $loginhelp = &loginhelpdisplay($authdomain,%lt);
367: $loginhelp .= '<br />' if $loginhelp;
368:
369: # ---------------------------------------------------- Serve out DES JavaScript
370: {
371: my $jsh=Apache::File->new($include."/londes.js");
372: $r->print(<$jsh>);
373: }
374: # ---------------------------------------------------------- Serve rest of page
375:
376: $r->print(
377: '<div class="LC_Box"'
378: .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
379: );
380:
381: #
382: # If the loadbalancing yielded just http:// because perhaps there's no loadbalancing?
383: # then just us a relative link to authenticate:
384: #
385:
386: $r->print(<<ENDSERVERFORM);
387: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
388: <input type="hidden" name="logtoken" value="$logtoken" />
389: <input type="hidden" name="serverid" value="$lonhost" />
390: <input type="hidden" name="uname" value="" />
391: <input type="hidden" name="upass0" value="" />
392: <input type="hidden" name="upass1" value="" />
393: <input type="hidden" name="upass2" value="" />
394: <input type="hidden" name="udom" value="" />
395: <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
396: <input type="hidden" name="localres" value="$env{'form.localres'}" />
397: </form>
398: ENDSERVERFORM
399: my $coursecatalog;
400: if (($showcoursecat eq '') || ($showcoursecat)) {
401: $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
402: }
403: my $newuserlink;
404: if ($shownewuserlink) {
405: $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
406: }
407: my $logintitle =
408: '<h2 class="LC_hcell"'
409: .' style="background:'.$loginbox_header_bgcol.';'
410: .' color:'.$loginbox_header_textcol.'">'
411: .$lt{'log'}
412: .'</h2>';
413:
414: my $noscript_warning='<noscript><span class="LC_warning"><b>'
415: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
416: .'</b></span></noscript>';
417: my $helpdeskscript;
418: my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
419: $authdomain,\$helpdeskscript);
420:
421: my $loginform=(<<LFORM);
422: <form name="client" action="" onsubmit="return(send())">
423: <input type="hidden" name="lextkey" value="$lextkey" />
424: <input type="hidden" name="uextkey" value="$uextkey" />
425: <b><label for="uname">$lt{'un'}</label>:</b><br />
426: <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" /><br />
427: <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
428: <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
429: <b><label for="udom">$lt{'dom'}</label>:</b><br />
430: <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" /><br />
431: <input type="submit" value="$lt{'log'}" />
432: </form>
433: LFORM
434:
435: if ($showbanner) {
436: $r->print(<<HEADER);
437: <!-- The LON-CAPA Header -->
438: <div style="background:$pgbg;margin:0;width:100%;">
439: <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
440: </div>
441: HEADER
442: }
443: $r->print(<<ENDTOP);
444: <div style="float:left;">
445: <div class="LC_Box" style="background:$loginbox_bg;">
446: $logintitle
447: $loginform
448: $noscript_warning
449: </div>
450:
451: <div class="LC_Box" style="padding-top: 10px;">
452: $loginhelp
453: $forgotpw
454: $contactblock
455: $newuserlink
456: $coursecatalog
457: </div>
458: </div>
459:
460: <div>
461: ENDTOP
462: if ($showmainlogo) {
463: $r->print(' <img src="'.$logo.'" alt="" />'."\n");
464: }
465: $r->print(<<ENDTOP);
466: $announcements
467: $domainlogo
468: </div>
469: <hr style="clear:both;" />
470: ENDTOP
471:
472: $r->print(<<ENDDOCUMENT);
473: <table border="0" cellspacing="0" cellpadding="0">
474: <tr>
475: <td align="left" valign="top">
476: <small><b>$lt{'dom'}: </b></small>
477: </td>
478: <td align="left" valign="top">
479: <small><tt> $domain</tt></small>
480: </td>
481: </tr>
482: <tr>
483: <td align="left" valign="top">
484: <small><b>$lt{'serv'}: </b></small>
485: </td>
486: <td align="left" valign="top">
487: <small><tt> $lonhost ($role)</tt></small>
488: </td>
489: </tr>
490: <tr>
491: <td align="left" valign="top">
492: <small><b>$lt{'load'}: </b></small>
493: </td>
494: <td align="left" valign="top">
495: <small><tt> $loadpercent $lt{'perc'}</tt></small>
496: </td>
497: </tr>
498: <tr>
499: <td align="left" valign="top">
500: <small><b>$lt{'userload'}: </b></small>
501: </td>
502: <td align="left" valign="top">
503: <small><tt> $userloadpercent $lt{'perc'}</tt></small>
504: </td>
505: </tr>
506: <tr>
507: <td colspan="2" align="left">
508: <small>$version</small>
509: </td>
510: </tr>
511: </table>
512: </div>
513:
514: <script type="text/javascript">
515: // <![CDATA[
516: // the if prevents the script error if the browser can not handle this
517: if ( document.client.uname ) { document.client.uname.focus(); }
518: // ]]>
519: </script>
520: $helpdeskscript
521:
522: ENDDOCUMENT
523: my %endargs = ( 'noredirectlink' => 1, );
524: $r->print(&Apache::loncommon::end_page(\%endargs));
525: return OK;
526: }
527:
528: sub check_loginvia {
529: my ($domain,$lonhost) = @_;
530: if ($domain eq '' || $lonhost eq '') {
531: return;
532: }
533: my %domconfhash = &Apache::loncommon::get_domainconf($domain);
534: my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
535: my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
536: my $output;
537: if ($loginvia ne '') {
538: my $noredirect;
539: my $ip = $ENV{'REMOTE_ADDR'};
540: if ($ip eq '127.0.0.1') {
541: $noredirect = 1;
542: } else {
543: if ($loginvia_exempt ne '') {
544: my @exempt = split(',',$loginvia_exempt);
545: if (grep(/^\Q$ip\E$/,@exempt)) {
546: $noredirect = 1;
547: }
548: }
549: }
550: unless ($noredirect) {
551: my ($newhost,$path);
552: if ($loginvia =~ /:/) {
553: ($newhost,$path) = split(':',$loginvia);
554: } else {
555: $newhost = $loginvia;
556: }
557: if ($newhost ne $lonhost) {
558: if (&Apache::lonnet::hostname($newhost) ne '') {
559: $output = &redirect_page($newhost,$path);
560: }
561: }
562: }
563: }
564: return $output;
565: }
566:
567: sub redirect_page {
568: my ($desthost,$path) = @_;
569: my $protocol = $Apache::lonnet::protocol{$desthost};
570: $protocol = 'http' if ($protocol ne 'https');
571: unless ($path =~ m{^/}) {
572: $path = '/'.$path;
573: }
574: my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;
575: if ($env{'form.firsturl'} ne '') {
576: $url .='?firsturl='.$env{'form.firsturl'};
577: }
578: my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
579: {'redirect' => [0,$url],});
580: my $end_page = &Apache::loncommon::end_page();
581: return $start_page.$end_page;
582: }
583:
584: sub contactdisplay {
585: my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript) = @_;
586: my $contactblock;
587: my $showhelpdesk = 0;
588: my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
589: if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {
590: $showhelpdesk = 1;
591: }
592: if ($servadm && $showadminmail) {
593: $contactblock .= $$lt{'servadm'}.':<br />'.
594: '<tt>'.$servadm.'</tt><br />';
595: }
596: if ($showhelpdesk) {
597: $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
598: my $thisurl = &escape('/adm/login');
599: $$helpdeskscript = <<"ENDSCRIPT";
600: <script type="text/javascript">
601: // <![CDATA[
602: function helpdesk() {
603: var codedom = document.client.udom.value;
604: if (codedom == '') {
605: codedom = "$authdomain";
606: }
607: var querystr = "origurl=$thisurl&codedom="+codedom;
608: document.location.href = "/adm/helpdesk?"+querystr;
609: return;
610: }
611: // ]]>
612: </script>
613: ENDSCRIPT
614: }
615: return $contactblock;
616: }
617:
618: sub forgotpwdisplay {
619: my (%lt) = @_;
620: my $prompt_for_resetpw = 1;
621: if ($prompt_for_resetpw) {
622: return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
623: }
624: return;
625: }
626:
627: sub loginhelpdisplay {
628: my ($authdomain,%lt) = @_;
629: my $login_help = 1;
630: if ($login_help) {
631: my $dom = $authdomain;
632: if ($dom eq '') {
633: $dom = &Apache::lonnet::default_login_domain();
634: }
635: my %helpconfig = &Apache::lonnet::get_dom('configuration',['helpsettings'],$dom);
636: my $loginhelp_url = $helpconfig{'helpsettings'}{'loginhelpurl'};
637: if ($loginhelp_url ne '') {
638: return '<a href="'.$loginhelp_url.'">'.$lt{'help'}.'</a>';
639: } else {
640: return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>';
641: }
642: }
643: return;
644: }
645:
646: sub coursecatalog_link {
647: my ($linkname) = @_;
648: return <<"END";
649: <a href="/adm/coursecatalog">$linkname</a>
650: END
651: }
652:
653: sub newuser_link {
654: my ($linkname) = @_;
655: return '<a href="/adm/createaccount">'.$linkname.'</a>';
656: }
657:
658: 1;
659: __END__
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