File:
[LON-CAPA] /
loncom /
auth /
lonlogin.pm
Revision
1.140:
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Wed Aug 25 16:34:32 2010 UTC (13 years, 10 months ago) by
raeburn
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MAIN
CVS tags:
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- Offloading from a busy server delayed until after authentication so
user's domain is available when determining which less loaded server
will host (check that hosting is allowed).
1: # The LearningOnline Network
2: # Login Screen
3: #
4: # $Id: lonlogin.pm,v 1.140 2010/08/25 16:34:32 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: my $firsturl=
156: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
157: # ----------------------------------------------------------- Get announcements
158: my $announcements=&Apache::lonnet::getannounce();
159: # -------------------------------------------------------- Set login parameters
160:
161: my @hexstr=('0','1','2','3','4','5','6','7',
162: '8','9','a','b','c','d','e','f');
163: my $lkey='';
164: for (0..7) {
165: $lkey.=$hexstr[rand(15)];
166: }
167:
168: my $ukey='';
169: for (0..7) {
170: $ukey.=$hexstr[rand(15)];
171: }
172:
173: my $lextkey=hex($lkey);
174: if ($lextkey>2147483647) { $lextkey-=4294967296; }
175:
176: my $uextkey=hex($ukey);
177: if ($uextkey>2147483647) { $uextkey-=4294967296; }
178:
179: # -------------------------------------------------------- Store away log token
180: my $tokenextras;
181: if ($env{'form.role'}) {
182: $tokenextras = '&role='.&escape($env{'form.role'});
183: }
184: if ($env{'form.symb'}) {
185: if (!$tokenextras) {
186: $tokenextras = '&';
187: }
188: $tokenextras .= '&symb='.&escape($env{'form.symb'});
189: }
190: my $logtoken=Apache::lonnet::reply(
191: 'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
192: $lonhost);
193:
194: # ------------------- If we cannot talk to ourselves, we are in serious trouble
195:
196: if ($logtoken eq 'con_lost') {
197: my $spares='';
198: my $last;
199: foreach my $hostid (sort
200: {
201: &Apache::lonnet::hostname($a) cmp
202: &Apache::lonnet::hostname($b);
203: }
204: keys(%Apache::lonnet::spareid)) {
205: next if ($hostid eq $lonhost);
206: my $hostname = &Apache::lonnet::hostname($hostid);
207: next if ($last eq $hostname);
208: $spares.='<br /><font size="+1"><a href="http://'.
209: $hostname.
210: '/adm/login?domain='.$authdomain.'">'.
211: $hostname.'</a>'.
212: ' '.&mt('(preferred)').'</font>'.$/;
213: $last=$hostname;
214: }
215: $spares.= '<br />';
216: my %all_hostnames = &Apache::lonnet::all_hostnames();
217: foreach my $hostid (sort
218: {
219: &Apache::lonnet::hostname($a) cmp
220: &Apache::lonnet::hostname($b);
221: }
222: keys(%all_hostnames)) {
223: next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
224: my $hostname = &Apache::lonnet::hostname($hostid);
225: next if ($last eq $hostname);
226: $spares.='<br /><a href="http://'.
227: $hostname.
228: '/adm/login?domain='.$authdomain.'">'.
229: $hostname.'</a>';
230: $last=$hostname;
231: }
232: $r->print(
233: '<html>'
234: .'<head><title>'
235: .&mt('The LearningOnline Network with CAPA')
236: .'</title></head>'
237: .'<body bgcolor="#FFFFFF">'
238: .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
239: .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
240: .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>'
241: .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>'
242: .$spares
243: .'</body>'
244: .'</html>'
245: );
246: return OK;
247: }
248:
249: # ----------------------------------------------- Apparently we are in business
250: $servadm=~s/\,/\<br \/\>/g;
251:
252: # ----------------------------------------------------------- Front page design
253: my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
254: my $font=&Apache::loncommon::designparm('login.font',$domain);
255: my $link=&Apache::loncommon::designparm('login.link',$domain);
256: my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
257: my $alink=&Apache::loncommon::designparm('login.alink',$domain);
258: my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
259: my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
260: my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
261: my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
262: my $logo=&Apache::loncommon::designparm('login.logo',$domain);
263: my $img=&Apache::loncommon::designparm('login.img',$domain);
264: my $domainlogo='<div>'.&Apache::loncommon::domainlogo($domain).'</div>';
265: my $showbanner = 1;
266: my $showmainlogo = 1;
267: if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
268: $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
269: }
270: if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
271: $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
272: }
273: my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
274: my $showcoursecat =
275: &Apache::loncommon::designparm('login.coursecatalog',$domain);
276: my $shownewuserlink =
277: &Apache::loncommon::designparm('login.newuser',$domain);
278: my $now=time;
279: my $js = (<<ENDSCRIPT);
280:
281: <script type="text/javascript" language="JavaScript">
282: // <![CDATA[
283: function send()
284: {
285: this.document.server.elements.uname.value
286: =this.document.client.elements.uname.value;
287:
288: this.document.server.elements.udom.value
289: =this.document.client.elements.udom.value;
290:
291: uextkey=this.document.client.elements.uextkey.value;
292: lextkey=this.document.client.elements.lextkey.value;
293: initkeys();
294:
295: this.document.server.elements.upass0.value
296: =crypted(this.document.client.elements.upass$now.value.substr(0,15));
297: this.document.server.elements.upass1.value
298: =crypted(this.document.client.elements.upass$now.value.substr(15,15));
299: this.document.server.elements.upass2.value
300: =crypted(this.document.client.elements.upass$now.value.substr(30,15));
301:
302: this.document.client.elements.uname.value='';
303: this.document.client.elements.upass$now.value='';
304:
305: this.document.server.submit();
306: return false;
307: }
308:
309: function enableInput() {
310: this.document.client.elements.upass$now.removeAttribute("readonly");
311: this.document.client.elements.uname.removeAttribute("readonly");
312: this.document.client.elements.udom.removeAttribute("readonly");
313: return;
314: }
315:
316: // ]]>
317: </script>
318:
319: ENDSCRIPT
320:
321: # --------------------------------------------------- Print login screen header
322:
323: my %add_entries = (
324: bgcolor => "$mainbg",
325: text => "$font",
326: link => "$link",
327: vlink => "$vlink",
328: alink => "$alink",
329: onload => 'javascript:enableInput();',);
330:
331: $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
332: { 'redirect' => [$expire,'/adm/roles'],
333: 'add_entries' => \%add_entries,
334: 'only_body' => 1,}));
335:
336: # ----------------------------------------------------------------------- Texts
337:
338: my %lt=&Apache::lonlocal::texthash(
339: 'un' => 'Username',
340: 'pw' => 'Password',
341: 'dom' => 'Domain',
342: 'perc' => 'percent',
343: 'load' => 'Server Load',
344: 'userload' => 'User Load',
345: 'catalog' => 'Course/Community Catalog',
346: 'log' => 'Log in',
347: 'help' => 'Log-in Help',
348: 'serv' => 'Server',
349: 'servadm' => 'Server Administration',
350: 'helpdesk' => 'Contact Helpdesk',
351: 'forgotpw' => 'Forgot password?',
352: 'newuser' => 'New User?',
353: );
354: # -------------------------------------------------- Change password field name
355:
356: my $forgotpw = &forgotpwdisplay(%lt);
357: $forgotpw .= '<br />' if $forgotpw;
358: my $loginhelp = &loginhelpdisplay($authdomain,%lt);
359: $loginhelp .= '<br />' if $loginhelp;
360:
361: # ---------------------------------------------------- Serve out DES JavaScript
362: {
363: my $jsh=Apache::File->new($include."/londes.js");
364: $r->print(<$jsh>);
365: }
366: # ---------------------------------------------------------- Serve rest of page
367:
368: $r->print(
369: '<div class="LC_Box"'
370: .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
371: );
372:
373: #
374: # If the loadbalancing yielded just http:// because perhaps there's no loadbalancing?
375: # then just us a relative link to authenticate:
376: #
377:
378: $r->print(<<ENDSERVERFORM);
379: <form name="server" action="/adm/authenticate" method="post" target="_top">
380: <input type="hidden" name="logtoken" value="$logtoken" />
381: <input type="hidden" name="serverid" value="$lonhost" />
382: <input type="hidden" name="uname" value="" />
383: <input type="hidden" name="upass0" value="" />
384: <input type="hidden" name="upass1" value="" />
385: <input type="hidden" name="upass2" value="" />
386: <input type="hidden" name="udom" value="" />
387: <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
388: <input type="hidden" name="localres" value="$env{'form.localres'}" />
389: </form>
390: ENDSERVERFORM
391: my $coursecatalog;
392: if (($showcoursecat eq '') || ($showcoursecat)) {
393: $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
394: }
395: my $newuserlink;
396: if ($shownewuserlink) {
397: $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
398: }
399: my $logintitle =
400: '<h2 class="LC_hcell"'
401: .' style="background:'.$loginbox_header_bgcol.';'
402: .' color:'.$loginbox_header_textcol.'">'
403: .$lt{'log'}
404: .'</h2>';
405:
406: my $noscript_warning='<noscript><span class="LC_warning"><b>'
407: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
408: .'</b></span></noscript>';
409: my $helpdeskscript;
410: my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
411: $authdomain,\$helpdeskscript);
412:
413: my $loginform=(<<LFORM);
414: <form name="client" action="" onsubmit="return(send())">
415: <input type="hidden" name="lextkey" value="$lextkey" />
416: <input type="hidden" name="uextkey" value="$uextkey" />
417: <b><label for="uname">$lt{'un'}</label>:</b><br />
418: <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" /><br />
419: <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
420: <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
421: <b><label for="udom">$lt{'dom'}</label>:</b><br />
422: <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" /><br />
423: <input type="submit" value="$lt{'log'}" />
424: </form>
425: LFORM
426:
427: if ($showbanner) {
428: $r->print(<<HEADER);
429: <!-- The LON-CAPA Header -->
430: <div style="background:$pgbg;margin:0;width:100%;">
431: <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
432: </div>
433: HEADER
434: }
435: $r->print(<<ENDTOP);
436: <div style="float:left;">
437: <div class="LC_Box" style="background:$loginbox_bg;">
438: $logintitle
439: $loginform
440: $noscript_warning
441: </div>
442:
443: <div class="LC_Box" style="padding-top: 10px;">
444: $loginhelp
445: $forgotpw
446: $contactblock
447: $newuserlink
448: $coursecatalog
449: </div>
450: </div>
451:
452: <div>
453: ENDTOP
454: if ($showmainlogo) {
455: $r->print(' <img src="'.$logo.'" alt="" />'."\n");
456: }
457: $r->print(<<ENDTOP);
458: $announcements
459: $domainlogo
460: </div>
461: <hr style="clear:both;" />
462: ENDTOP
463:
464: $r->print(<<ENDDOCUMENT);
465: <table border="0" cellspacing="0" cellpadding="0">
466: <tr>
467: <td align="left" valign="top">
468: <small><b>$lt{'dom'}: </b></small>
469: </td>
470: <td align="left" valign="top">
471: <small><tt> $domain</tt></small>
472: </td>
473: </tr>
474: <tr>
475: <td align="left" valign="top">
476: <small><b>$lt{'serv'}: </b></small>
477: </td>
478: <td align="left" valign="top">
479: <small><tt> $lonhost ($role)</tt></small>
480: </td>
481: </tr>
482: <tr>
483: <td align="left" valign="top">
484: <small><b>$lt{'load'}: </b></small>
485: </td>
486: <td align="left" valign="top">
487: <small><tt> $loadpercent $lt{'perc'}</tt></small>
488: </td>
489: </tr>
490: <tr>
491: <td align="left" valign="top">
492: <small><b>$lt{'userload'}: </b></small>
493: </td>
494: <td align="left" valign="top">
495: <small><tt> $userloadpercent $lt{'perc'}</tt></small>
496: </td>
497: </tr>
498: <tr>
499: <td colspan="2" align="left">
500: <small>$version</small>
501: </td>
502: </tr>
503: </table>
504: </div>
505:
506: <script type="text/javascript">
507: // <![CDATA[
508: // the if prevents the script error if the browser can not handle this
509: if ( document.client.uname ) { document.client.uname.focus(); }
510: // ]]>
511: </script>
512: $helpdeskscript
513:
514: ENDDOCUMENT
515: my %endargs = ( 'noredirectlink' => 1, );
516: $r->print(&Apache::loncommon::end_page(\%endargs));
517: return OK;
518: }
519:
520: sub check_loginvia {
521: my ($domain,$lonhost) = @_;
522: if ($domain eq '' || $lonhost eq '') {
523: return;
524: }
525: my %domconfhash = &Apache::loncommon::get_domainconf($domain);
526: my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
527: my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
528: my $output;
529: if ($loginvia ne '') {
530: my $noredirect;
531: my $ip = $ENV{'REMOTE_ADDR'};
532: if ($ip eq '127.0.0.1') {
533: $noredirect = 1;
534: } else {
535: if ($loginvia_exempt ne '') {
536: my @exempt = split(',',$loginvia_exempt);
537: if (grep(/^\Q$ip\E$/,@exempt)) {
538: $noredirect = 1;
539: }
540: }
541: }
542: unless ($noredirect) {
543: my ($newhost,$path);
544: if ($loginvia =~ /:/) {
545: ($newhost,$path) = split(':',$loginvia);
546: } else {
547: $newhost = $loginvia;
548: }
549: if ($newhost ne $lonhost) {
550: if (&Apache::lonnet::hostname($newhost) ne '') {
551: $output = &redirect_page($newhost,$path);
552: }
553: }
554: }
555: }
556: return $output;
557: }
558:
559: sub redirect_page {
560: my ($desthost,$path) = @_;
561: my $protocol = $Apache::lonnet::protocol{$desthost};
562: $protocol = 'http' if ($protocol ne 'https');
563: unless ($path =~ m{^/}) {
564: $path = '/'.$path;
565: }
566: my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;
567: if ($env{'form.firsturl'} ne '') {
568: $url .='?firsturl='.$env{'form.firsturl'};
569: }
570: my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
571: {'redirect' => [0,$url],});
572: my $end_page = &Apache::loncommon::end_page();
573: return $start_page.$end_page;
574: }
575:
576: sub contactdisplay {
577: my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript) = @_;
578: my $contactblock;
579: my $showhelpdesk = 0;
580: my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
581: if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {
582: $showhelpdesk = 1;
583: }
584: if ($servadm && $showadminmail) {
585: $contactblock .= $$lt{'servadm'}.':<br />'.
586: '<tt>'.$servadm.'</tt><br />';
587: }
588: if ($showhelpdesk) {
589: $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
590: my $thisurl = &escape('/adm/login');
591: $$helpdeskscript = <<"ENDSCRIPT";
592: <script type="text/javascript">
593: // <![CDATA[
594: function helpdesk() {
595: var codedom = document.client.udom.value;
596: if (codedom == '') {
597: codedom = "$authdomain";
598: }
599: var querystr = "origurl=$thisurl&codedom="+codedom;
600: document.location.href = "/adm/helpdesk?"+querystr;
601: return;
602: }
603: // ]]>
604: </script>
605: ENDSCRIPT
606: }
607: return $contactblock;
608: }
609:
610: sub forgotpwdisplay {
611: my (%lt) = @_;
612: my $prompt_for_resetpw = 1;
613: if ($prompt_for_resetpw) {
614: return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
615: }
616: return;
617: }
618:
619: sub loginhelpdisplay {
620: my ($authdomain,%lt) = @_;
621: my $login_help = 1;
622: if ($login_help) {
623: my $dom = $authdomain;
624: if ($dom eq '') {
625: $dom = &Apache::lonnet::default_login_domain();
626: }
627: my %helpconfig = &Apache::lonnet::get_dom('configuration',['helpsettings'],$dom);
628: my $loginhelp_url = $helpconfig{'helpsettings'}{'loginhelpurl'};
629: if ($loginhelp_url ne '') {
630: return '<a href="'.$loginhelp_url.'">'.$lt{'help'}.'</a>';
631: } else {
632: return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>';
633: }
634: }
635: return;
636: }
637:
638: sub coursecatalog_link {
639: my ($linkname) = @_;
640: return <<"END";
641: <a href="/adm/coursecatalog">$linkname</a>
642: END
643: }
644:
645: sub newuser_link {
646: my ($linkname) = @_;
647: return '<a href="/adm/createaccount">'.$linkname.'</a>';
648: }
649:
650: 1;
651: __END__
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