viewvc.cgi/docman/docman.php

<?php

/*  Copyright 1999 by John Martin d/b/a www.ANYPORTAL.com       */
/*  All Rights Reserved.                                        */
/*                                                              */
/*  This software is freeware and is not in the public domain.  */
/*  You are hereby granted the right to freely distribute this  */
/*  software as long as this copyright notice remains in place. */
/*                                                              */
/*  Comments or suggestions?   email: andmore@alief.com         */
/*                                                              */
/*  This is the PHP port: AnyPortal(php)-0.1                    */
/*  ========================================                    */
/*                                                              */
/*  PHP version 2000 by Stefan@Wiesendanger.org                 */
/*  No Rights Reserved. What for, anyhow ?                      */
/*                                                              */
/*  Date       Remarks                                          */
/*  ---------  -----------------------------------------------  */
/*  25 MAY 99  original ASP version                             */     
/*  17 SEP 99  change upload from SA-FILEUP to aspSmartUpload   */
/*  10 APR 00  simplified PHP3 version                          */
/*  18 APR 00  most of PHP3 port working. Slight modifications  */
/*  22 APR 00  modified syntax highlighting, no absolute paths  */
/*             revealed, PHP builtin authentication, global     */
/*             style sheet as callback, use apache default      */
/*             icons as an alternative to the wingdings font.   */
/*  25 APR 00  catch some exceptions (not foolproof yet)        */
/*  26 APR 00  catch some more exceptions, implicit copy        */
/*             function by saving somewhere else in the detail  */
/*             view, MD5 hashed password.                       */
/*  27 APR 00  Fixed authentication bug                         */
/*  12 MAY 00  Fixed trouble with exec() with newer versions of */
/*             PHP3. Fixed bug which would send you to a non-   */
/*             existent address after file modifications.       */

/*

        This project is now called Directory Manager.

        For more info, please see web pages at
        http://www.rot13.org/~dpavlin/docman.html

        It's relased under GPL by
        Dobrica Pavlinusic <dpavlin@rot13.org>


IMPORTANT INSTALLATION NOTE:
        deny serving of .* (dot-something) files in web server!
        Otherwise, uses can access your log files, users and/or
        deleted files!

        .htusers is in form:
        login:Real Name:[md5(loginpassword)|auth_*]:email@host.dom


TODO:
        mixed file/directory output (add type to each entry,
                real support for links)
        access controll

*/

//////////////////////////////////////////////////////////////////

// TODO : Don't let the file be modified itself. Create a hash of 
// it (kinda hard since it's self-referential ;-). Make better use 
// of session management. Escapeshellcmd for all user input.

//////////////////////////////////////////////////////////////////

// GLOBAL PARAMETERS
// =================
// Make modifications here to suit docman to your needs

//      error_reporting(4) ;            // how verbose ?

        // from where to include auth_*.php modules?
        $gblIncDir = "/home/httpd/docman";

        // username/password should not be system 
        // usernames/passwords !!

        $gblPw    = "";

        // date format
//      $gblDateFmt="D, F d, Y";
        $gblDateFmt="Y-m-d";

        // time format
//      $gblTimeFmt="g:i:sA";
        $gblTimeFmt="H:i:s";

        // Number of backup files to keep
        $gblNumBackups=3;

        // show red star if newer than ... days
        $gblModDays=1;

        // choose GifIcon below unless you have the M$
        // WingDings font installed on your system

        $gblIcon="GifIcon";             // MockIcon or GifIcon

        // the directory below should be /icons/ or /icons/small/ 
        // on Apache; a set of icons is included in the distribution

        $gblIconLocation="/icons/"; 

        // files you want to be able to edit in text mode
        // and view with (primitive) syntax highlighting

        $gblEditable = array( ".txt",".asa",".asp",".htm",".html",
                              ".cfm",".php3",".php",".phtml",
                              ".shtml",".css" ) ;

        // files that will display as images on the detail page
        // (useless if your browser doesn't support them)

        $gblImages   = array( ".jpg",".jpeg",".gif",".png",".ico",
                              ".bmp",".xbm") ;

        // Where are users? (by default in .htusers file)
        $gblUsers = "htusers_file";

//////////////////////////////////////////////////////////////////

function StartHTML($title,$text="") {

        $title = "Document Manager " . $title ;
        $host  = $GLOBALS["HTTP_HOST"] ;
        $self  = $GLOBALS["PHP_SELF"] ;
?>

<HTML>
<HEAD>
 <TITLE><?= $host . " " . $title ?></TITLE>
 <META NAME="description" CONTENT="PHP port of AnyPortal Site Manager">
 <META NAME="keywords" CONTENT="site manager, web site maintenance">
 <META NAME="robots" CONTENT="noindex">
 <META HTTP-EQUIV="expires" CONTENT="0">
 <LINK REL="stylesheet" TYPE="text/css" 
        HREF="<?= $self ?>?STYLE=get">
</HEAD>
<BODY BGCOLOR="#FFFFFF">
 <H3 ALIGN="RIGHT"><?= $host ?></H3>
<TABLE BORDER=0 WIDTH="100%"><TR>
 <TD CLASS=INV><?= $title ?></TD></TR></TABLE>
 <P><?= $text ?></P>

<?php 
} // end function StartHTML

//////////////////////////////////////////////////////////////////

function EndHTML() {
?>

<HR>
<P CLASS=FTR>
<B><?= date($GLOBALS[gblDateFmt]) ?> -
<?= date($GLOBALS[gblTimeFmt]) ?> -
<?= $GLOBALS[gblUserName] ?>
<small> [<a href="<?= $GLOBALS["PHP_SELF"] ?>?relogin=<?= $GLOBALS[gblPw] ?>">logout</a>]</small>
</B>
<BR>ANYPORTAL(php) Site Manager 
<br><small>
&copy; 1999 by <A HREF="http://www.anyportal.com">ANYPORTAL</A>,
&copy; 2000 by <A HREF="http://da.nger.org">d@nger.org</A>,
&copy; 2000 by <A HREF="http://www.rot13.org/~dpavlin/">DbP</A>
</small>
</P>
<BR>
<? //include(".debug.inc") ?>
<BR><BR></BODY></HTML>

<?php
} // end function EndHTML

//////////////////////////////////////////////////////////////////

function CSS() {
?>

BODY,TD,P,H1,H2,H3 { font-family:Verdana,Helvetica,Arial,sans-serif; }
.BLK { color:black; }
.RED { color:red; }
.TOP { color:red; font-size:70%; } /* table headings */
.INV { color:white; background-color:navy; 
        font-weight:bold; font-size:120%; } /* title */
.FTR { } /* footer */
.LST { background-color:#E0E0E0; } /* table cells */
.BAR { background-color:#E0E0E0; } /* action bar */
PRE { color:blue; font-family:Lucida Console,Courier New,
        Courier,sans-serif; } /* source code */
EM { color:green; font-style:normal; } /* line numbers */
.REM { color:silver; }
.XML { color:navy; background-color:yellow; }
.MCK { color:red; font-family:WingDings; } /* Mock Icons */
A:HOVER { color:red; }

<?php
} // end function CSS

//////////////////////////////////////////////////////////////////

function DetailPage($fsRoot,$relDir,$fn) {
        
        global $gblEditable, $gblImages, $webRoot ;
        $self = $GLOBALS["PHP_SELF"] ;

        $relPath  = $relDir . "/" . $fn ;
        $fsPath   = $fsRoot . $relPath ;
        $fsDir    = $fsRoot . $relDir ;

        $exists   = file_exists($fsPath) ;
        $ext      = strtolower(strrchr($relPath,".")) ;
        $editable = ( $ext=="" || strstr(join(" ",$gblEditable),$ext)) ;
        $writable = is_writeable($fsPath) ;
        $file_lock = CheckLock($fsPath);

        if (!$editable && !$exists) 
                Error("Creation unsupported for type",$relPath) ;
        if (!exists && !is_writeable($fsDir) )
                Error("Creation denied",$relDir) ;

        $text  = "Use this page to view, modify or " ;
        if (is_dir($fsPath)) {
                $text .="delete a directory on this " ;
        } else {
                $text .= "delete a single document on this " ;
        };
        $text .= "web site." ;  
        $title = "(Detail Page)" ;
        StartHTML($title, $text) ;

        echo "<H3>" . $relDir . "/" . $fn . "</H3>" ;
        if ($exists) {  // get file info
                $fsize = filesize($fsPath) ; 
                $fmodified = date("$GLOBALS[gblDateFmt] $GLOBALS[gblTimeFmt]", filemtime($fsPath)) ;
                $faccessed = date("$GLOBALS[gblDateFmt] $GLOBALS[gblTimeFmt]", fileatime($fsPath)) ;
                $fuid=fileowner($fsPath);
                $fgid=filegroup($fsPath);
                $userinfo = posix_getpwuid($fuid);
                $grpinfo = posix_getgrgid($fgid);
                echo "<PRE>";
                if (!is_dir($fsPath)) echo "    file size: " . $fsize . " Bytes<BR>" ;
                echo "last modified: <B>" . $fmodified . "</B><BR>" ;
                echo "last accessed: <B>" . $faccessed . "</B><BR>" ;
                echo "        owner: <B>" . $userinfo["name"] . " [$fuid]</B><BR>" ;
                echo "        group: <B>" . $grpinfo["name"] . " [$fgid]</B><BR>" ;
                echo "  permissions: <B>" ; 
                echo printf( "%o", fileperms($fsPath) ) . "</B>" ;
                echo "</PRE>" ;

        }

        if ( !is_dir($fsPath) && $editable && ($writable || !$exists) && !$file_lock ) { 
                $fh = fopen($fsPath,"a+") ;
                rewind($fh) ;
                $fstr = fread($fh,filesize($fsPath)) ;
                fclose($fh) ;
                $fstr = htmlentities( $fstr ) ;
?>

<FORM ACTION="<?= $self ; ?>" METHOD="POST">
<SPAN TITLE="Click [SAVE] to store updated contents.">
        <B>DOCUMENT CONTENTS</B>
</SPAN><BR>
<TEXTAREA NAME="FILEDATA" ROWS=18 COLS=70 WRAP="OFF"><?php 
echo($fstr) ; ?></TEXTAREA>
<INPUT TYPE="HIDDEN" NAME="DIR" VALUE="<?= $relDir ; ?>">
<INPUT TYPE="HIDDEN" NAME="FN" VALUE="<?= $fn ; ?>">
<INPUT TYPE="HIDDEN" NAME="POSTACTION" VALUE="SAVE">
<INPUT TYPE="HIDDEN" SIZE=48 MAXLENGTH=255 NAME="RELPATH" 
        VALUE="<?= $relPath ; ?>">
<br>
<INPUT TYPE="RESET" VALUE="UNDO ALL CHANGES">
<INPUT TYPE="SUBMIT" VALUE="SAVE">
</FORM>

<?php
        }
        if ( !$file_lock && $ext!="" && strstr(join(' ',$gblImages),$ext) ) {  
                $info  = getimagesize($fsPath) ;
                $tstr = "<IMG SRC=\"$webRoot".urlpath($relPath)."\" BORDER=0 " ;
                $tstr .= $info[3] . " ALT=\"" . $fn . " - " ;
                $tstr .= (int)(($fsize+1023)/1024) . "Kb\">" ;
//              echo htmlentities($tstr) . "<BR><BR>" . $tstr ;
                echo $tstr ;
        }

?>

<FORM ACTION="<?= $self ; ?>" METHOD="POST">
<INPUT TYPE="HIDDEN" NAME="DIR" VALUE="<?= $relDir ; ?>">
<INPUT TYPE="HIDDEN" NAME="FN" VALUE="<?= $fn ; ?>">
<INPUT TYPE="SUBMIT" NAME="POSTACTION" VALUE="CANCEL"><BR>

<?php

        if ($file_lock) {
?>
<hr>
<SPAN TITLE="Check OK and click UNLOCK to remove lock on file.">
<B>OK TO FORCE LOCK REMOVAL ON "<?= $fn ; ?>" HELD BY <?= $file_lock ?>? </B></SPAN>
<INPUT TYPE="CHECKBOX" NAME="CONFIRM">
<INPUT TYPE="SUBMIT" NAME="POSTACTION" VALUE="UNLOCK">
<?
        } // file_lock

        if (substr($fn,0,4) == ".del") {
                $action="UNDELETE";
                $desc="undelete previously deleted file";
        } else {
                $action="DELETE";
                $desc="delete";
        }

        if ($exists && $writable) {
?>

<HR>
<a name="undelete">
<SPAN TITLE="Check OK and click [<?= $action ?>] to <?= $desc ?>.">
<B>OK TO <?= $action ?> "<?= $fn ; ?>"? </B></SPAN>
<INPUT TYPE="CHECKBOX" NAME="CONFIRM">
<INPUT TYPE="SUBMIT" NAME="POSTACTION" VALUE="<?= $action ?>">

<HR>
<a name="rename">
<SPAN TITLE="Check OK and click [RENAME] to rename.">
<B>OK TO RENAME "<?= $fn ; ?>" TO 
<INPUT TYPE="TEXT" SIZE=24 MAXLENGTH=255 NAME="NEWNAME" VALUE="<?= $fn ?>">
? </B></SPAN>
<INPUT TYPE="CHECKBOX" NAME="CONFIRM">
<INPUT TYPE="SUBMIT" NAME="POSTACTION" VALUE="RENAME">

<?php
        }       // exists && writable
?>
<HR>
<a name="note">
<B>NOTE FOR "<?= $fn ; ?>":
<INPUT TYPE="TEXT" SIZE=50 MAXLENGTH=255 NAME="NOTE" VALUE="<?= ReadNote($fsPath) ?>">
</B></SPAN>
<INPUT TYPE="SUBMIT" NAME="POSTACTION" VALUE="NOTE">

</FORM>

<?php

        $name=basename("$fsDir/$fn");
        $logname=dirname("$fsDir/$fn")."/.log/$name";
        $bakdir=dirname("$fsDir/$fn")."/.bak";
        if (file_exists($logname)) {
                $log=fopen($logname,"r");
                $cl1=" class=LST"; $cl2="";
                $logarr = array();
                while($line = fgetcsv($log,255,"\t")) {
                        $cl=$cl1; $cl1=$cl2; $cl2=$cl;
                        array_unshift($logarr,array($cl,$line[0],$line[1],$line[2],$line[3]));
                }
                fclose($log);
                if (is_dir("$fsDir/$fn")) {
                        $whatis="DIRECTORY";
                } else {
                        $whatis="FILE";
                }
                print "<hr><br><b>CHANGES TO THIS $whatis</b><br><table border=0 width=100%>\n";
                $bakcount = 0;  // start from 0, skip fist backup (it's current)
                while ($e = array_shift($logarr)) {
                        if (strstr($e[4],"upload")) {
                                if (file_exists("$bakdir/$bakcount/$name")) {
                                        $e[4]="<a href=\"$webRoot".urlpath(dirname($relPath)."/.bak/$bakcount/$name")."\">$e[4]</a>";
                                }
                                $bakcount++;
                        }
                        print "<tr><td$e[0]>$e[1]</td><td$e[0]>$e[2]</td><td$e[0]>$e[3]</td><td$e[0]>$e[4]</td></tr>\n";
                }
                print "</table>";
        }

        EndHTML() ;

} // end function DetailPage

//////////////////////////////////////////////////////////////////

function DisplayCode($fsRoot,$relDir,$fn) {

        $path = $fsRoot . $relDir . "/" . $fn ;

        if (!file_exists($path)) Error("File not found",$path) ;

        StartHTML("(".$relDir."/".$fn.")","");

        $tstr = join("",file($path)) ;
        $tstr = htmlentities($tstr) ;

        // Tabs
        $tstr = str_replace(chr(9),"   ",$tstr) ;  

        // ASP tags & XML/PHP tags
        $aspbeg = "<SPAN CLASS=XML>&lt;%</SPAN><SPAN CLASS=BLK>" ;
        $aspend = "</SPAN><SPAN CLASS=XML>%&gt;</SPAN>" ;
        $tstr = str_replace("&lt;%",$aspbeg,$tstr) ;
        $tstr = str_replace("%&gt;",$aspend,$tstr) ;    

        $xmlbeg = "<SPAN CLASS=XML>&lt;?</SPAN><SPAN CLASS=BLK>" ;
        $xmlend = "</SPAN><SPAN CLASS=XML>?&gt;</SPAN>" ;
        $tstr = str_replace("&lt;?",$xmlbeg,$tstr) ;
        $tstr = str_replace("?&gt;",$xmlend,$tstr) ;    

        // C style comment
        $tstr = str_replace("/*","<SPAN CLASS=REM>/*",$tstr) ;  
        $tstr = str_replace("*/","*/</SPAN>",$tstr) ;                   

        // HTML comments
        $tstr = str_replace("&lt;!--","<I CLASS=RED>&lt;!--",$tstr) ;  
        $tstr = str_replace("--&gt;","--&gt;</I>",$tstr) ;  

        echo "<PRE>" ;  

        $tstr = split("\n",$tstr) ;
        for ($i = 0 ; $i < sizeof($tstr) ; ++$i) {
                // add line numbers
                echo "<BR><EM>" ;
                echo substr(("000" . ($i+1)), -4) . ":</EM> " ;
                $line = $tstr[$i] ;
                // C++ style comments
                $pos = strpos($line,"//") ;
                // exceptions: two slashes aren't a script comment
                if (strstr($line,"//") &&
                    ! ($pos>0 && substr($line,$pos-1,1)==":") &&
                    ! (substr($line,$pos,8) == "//--&gt;") &&
                    ! (substr($line,$pos,9) == "// --&gt;")) {
                 $beg = substr($line,0,strpos($line,"//")) ;
                 $end = strstr($line,"//") ;
                 $line = $beg."<SPAN CLASS=REM>".$end."</SPAN>";
                }
                // shell & asp style comments
                $first = substr(ltrim($line),0,1) ;
                if ($first == "#" || $first == "'") {
                 $line = "<SPAN CLASS=REM>".$line."</SPAN>";
                }
                print($line) ;
        } // next i

        echo "</PRE>" ;
                
        EndHTML() ;

} // end function DisplayCode

//////////////////////////////////////////////////////////////////

function MockIcon($txt) {
        $tstr = "<SPAN CLASS=MCK>" ;

        switch (strtolower($txt)) {
        case ".bmp" :
        case ".gif" :
        case ".jpg" :
        case ".jpeg":
        case ".tif" :
        case ".tiff":
                $d = 176 ;
                break ;
        case ".doc" :
                $d = 50 ;
                break ;
        case ".exe" :
        case ".bat" :
                $d = 255 ;
                break ;
        case ".bas" :
        case ".c"   :
        case ".cc"  :
        case ".src" :
                $d = 255 ;
                break ;
        case "file" :
                $d = 51 ;
                break ;
        case "fldr" :
                $d = 48 ;
                break ;
        case ".htm" :
        case ".html":
        case ".asa" :
        case ".asp" :
        case ".cfm" :
        case ".php3":
        case ".php" :
        case ".phtml" :
        case ".shtml" :
                $d = 182 ;
                break ;
        case ".pdf" :
                $d = 38 ;
                break;
        case ".txt" :
        case ".ini" :
                $d = 52 ;
                break ;
        case ".xls" :
                $d = 252 ;
                break ;
        case ".zip" :
        case ".arc" :
        case ".sit" :
        case ".tar" :
        case ".gz"  :
        case ".tgz" :
        case ".Z"   :
                $d = 59 ;
                break ;
        case "view" :
                $d = 52 ;
                break ;
        case "up" :
                $d = 199 ;
                break ;
        case "blank" : 
                return "&nbsp;&nbsp;</SPAN>" ;
                break ;
        default :
                $d = 51 ;
        }

        return $tstr . chr($d) . "</SPAN>" ;
} // end function MockIcon

//////////////////////////////////////////////////////////////////

function GifIcon($txt) {
        global $gblIconLocation ;

        switch (strtolower($txt)) {
        case ".bmp" :
        case ".gif" :
        case ".jpg" :
        case ".jpeg":
        case ".tif" :
        case ".tiff": 
                $d = "image2.gif" ;
                break ;
        case ".doc" :
                $d = "layout.gif" ;
                break ;
        case ".exe" :
        case ".bat" :
                $d = "screw2.gif" ;
                break ;
        case ".bas" :
        case ".c"   :
        case ".cc"  :
        case ".src" :
                $d = "c.gif" ;
                break ;
        case "file" :
                $d = "generic.gif" ;
                break ;
        case "fldr" :
                $d = "dir.gif" ;
                break ;
        case ".phps" :
                $d = "phps.gif" ;
                break ;
        case ".php3" :
                $d = "php3.gif" ;
                break ;
        case ".htm" :
        case ".html":
        case ".asa" :
        case ".asp" :
        case ".cfm" :
        case ".php3":
        case ".php" :
        case ".phtml" :
        case ".shtml" :
                $d = "world1.gif" ;
                break ;
        case ".pdf" :
                $d = "pdf.gif" ;
                break;
        case ".txt" :
        case ".ini" :
                $d = "text.gif" ;
                break ;
        case ".xls" :
                $d = "box2.gif" ;
                break ;
        case ".zip" :
        case ".arc" :
        case ".sit" :
        case ".tar" :
        case ".gz"  :
        case ".tgz" :
        case ".Z"   :
                $d = "compressed.gif" ;
                break ;
        case "view" :
                $d = "index.gif" ;
                break ;
        case "up" :
                $d = "back.gif" ;
                break ;
        case "blank" : 
                $d = "blank.gif" ;
                break ;
        case "checkout":
                $d = "box2.gif";
                break;
        case "checkin":
                $d = "hand.up.gif";
                break;
        case "locked":
                $d = "screw2.gif";
                break;
        case "note":
                $d = "quill.gif";
                break;
        default :
                $d = "generic.gif" ;
        }

        return "<IMG SRC=\"$gblIconLocation" . $d . "\" BORDER=0>" ;
} // end function GifIcon

//////////////////////////////////////////////////////////////////

function Navigate($fsRoot,$relDir) {

        global $gblEditable, $gblIcon, $gblModDays, $webRoot ;

        $self     = $GLOBALS["PHP_SELF"] ;

        $fsDir = $fsRoot . $relDir . "/" ; // current directory

        if (!is_dir($fsDir)) Error("Dir not found",$relDir) ; 

        // read directory contents
        if ( !($dir = @opendir($fsDir)) ) 
                Error("Read Access denied",$relDir) ;
        while ($item = readdir($dir)) {
                if ( $item == ".." || $item == "." || substr($item,0,1) == "." ) continue ;
                if ( is_dir($fsDir . $item) ) {
                        $dirList[] = $item ;
                } else if ( is_file($fsDir . $item) ) {
                        $fileList[] = $item ;           
                } else if ( is_link($fsDir . $item) ) {
                        $dirList[] = $item ;
                } else {
                  // unknown file type
                  // $text = "Could not determine file type of " ;
                  // Error("File Error", $text.$relDir."/".$item) ;
                  // exit ;
                }
        }
        closedir($dir) ; 

        // scan deleted files
        if ( $GLOBALS[show_deleted] == 1 && ($dir = @opendir("$fsDir/.del")) ) {
                while ($item = readdir($dir)) {
                        if ( substr($item,0,1) == "." ) continue ;
                        $fileList[] = ".del/$item" ;            
                }
                closedir($dir) ; 
        }

        $emptyDir = ! (sizeof($dirList) || sizeof($fileList)) ;

        // start navigation page
        $text  = "Use this page to add, delete";
        if (! isset($show_deleted)) {
                $text .= ", <a href=$self?D=".urlencode($relDir)."&show_deleted=1>undelete</a>";
        }
        $text .= " or revise files on this web site." ;
        $text .= "<br>Examine list of files <a href=\"$self?A=Ch1\">changed in last day</a> or <a href=\"$self?A=Ch\">all changes</a>.";
        StartHTML("(Navigate)",$text) ;

        echo "<TABLE BORDER=0 CELLPADDING=2 
                CELLSPACING=3 WIDTH=\"100%\">" ;

        // updir bar    
        if ($fsDir != $fsRoot) {
                $parent = dirname($relDir) ;
                if ($parent == "") $parent = "/" ;
?>

<TR><TD><?= $gblIcon("up") ?></TD><TD COLSPAN=5 CLASS=LST>
<A HREF="<?= $self ?>?D=<?= urlencode($parent) ?>">
<B><?= $parent ?></B></A></TD></TR>

<?php
        }

function plural($name,$count) {
        $out="$count $name";
        if ($count > 1) {
                $out.="s";
        }
        return $out;
}

        // output subdirs
        if (sizeof($dirList) > 0) {
                sort($dirList) ; 
?>

<TR><TD></TD><TD COLSPAN=2 CLASS=TOP>DIRECTORY NAME (<?= plural("dir",sizeof($dirList)) ?>)</TD><TD COLSPAN=3 CLASS=TOP>DIRECTORY NOTE</TR>

<?php
                while (list($key,$dir) = each($dirList)) {

                        $info_url=$self."?A=E&F=".urlencode($dir)."&D=".urlencode($relDir);
                        $tstr = "<A HREF=\"" . $self . "?D=" ; 
                        $tstr .= urlencode($relDir."/".$dir) ;
                        $tstr .= "\">" . $dir . "/</A>" ;
                        $note_html="<a href=\"$info_url#note\">".$gblIcon("note")."</a>".ReadNote($fsDir.$dir);
?>

<TR><TD>
<A HREF="<?= $info_url ?>" TITLE="View/Edit">
<?= $gblIcon("fldr") ?></A></TD>
<TD COLSPAN=2 CLASS=LST><?= $tstr ?></TD>
<TD COLSPAN=3 CLASS=LST><?= $note_html ?></TD></TR>

<?php
                }  // iterate over dirs
        }  // end if no dirs
?>

<TR><TD></TD><TD COLSPAN=5><HR><B><?= $webRoot . $relDir ?>
</B></TD></TR>
<TR><TD></TD><TD CLASS=TOP>DOCUMENT NAME (<?= plural("file",sizeof($fileList)) ?>)</TD>
<TD><?= $gblIcon("blank").$gblIcon("blank") ?></TD>
<TD CLASS=TOP>NOTE</TD>
<TD CLASS=TOP>LAST UPDATE</TD><TD CLASS=TOP>FILE SIZE</TD></TR>

<?php
        if (sizeof($fileList) > 0) {
          sort($fileList) ;
          while (list($key,$file) = each($fileList)) {  
                $path = $fsDir."/".$file ;
                $mod  = filemtime($path) ;
                $sz   = filesize($path) ;

                if ($sz >= 10240) {
                        $sz = (int)(($sz+1023)/1024) . " k" ;
                } else {
                        $sz .= " " ;
                } // end size

                $a = $b = "" ;

                $info_url=$self."?A=E&F=".urlencode($file)."&D=".urlencode($relDir);

                if ( ($mod + $gblModDays*86400) > time() ) {
                        $a  = "<SPAN CLASS=RED TITLE=\"Newer" ;
                        $a .= " than $gblModDays days\"> * </SPAN>" ;
                }

                $file_lock=CheckLock($path);

                $file_url_html="<A HREF=\"$self?A=V&F=".urlencode($file);
                $file_url_html.="&D=".urlencode($relDir);
                $file_url_html.="\" TITLE=\"View file\">" ;

                if (substr($file,0,5) != ".del/") {
                        $file_url_html .= $file . "</A>" . $a ;
                } else {
                        $file_url_html .= substr($file,5,strlen($file)-5) . "</a> <SPAN CLASS=RED TITLE=\"deleted\"> <a href=\"$info_url#undelete\">deleted</a> </span>";
                }

                $note_html="<a href=\"$info_url#note\">".$gblIcon("note")."</a>".ReadNote($path);

                $ext = strtolower(strrchr($file,".")) ;

                if ($file_lock) {
                        if ($file_lock == $GLOBALS[gblUserName]) {
                                $b.="<A HREF=\"$self?A=Ci&F=".urlencode($file);
                                $b.="&D=".urlencode($relDir);
                                $b.="\" TITLE=\"Checkin (update) file on server\">" ;
                                $file_url_html=$b;
                                $b.=$gblIcon("checkin")."</A>" ;
                                $b.= $gblIcon("blank");
                                $file_url_html.="$file</a> $a";
                                $note_html = $gblIcon("blank")."<b>Please check-in (update) this file</b>";
                        } else {
                                $b = $gblIcon("locked");
                                $b.= $gblIcon("blank");
                                $note_html = $gblIcon("blank")."<b>File locked by $file_lock</b>";
                                $file_url_html = "$file $a";
                        }
                } else {
                        $b.="<A HREF=\"$self?A=Co&F=".urlencode($file);
                        $b.="&D=".urlencode($relDir);
                        $b.="\" TITLE=\"Checkout file for edit\">" ;
                        $b.=$gblIcon("checkout")."</A>" ;

                        if ( $ext=="" || strstr(join(" ",$gblEditable),$ext) ) {  
                                $b.="<A HREF=\"$self?A=C&F=".urlencode($file);
                                $b.="&D=".urlencode($relDir);
                                $b.="\" TITLE=\"List contents\">" ;
                                $b.=$gblIcon("view")."</A>" ;
                        } else {
                                $b.= $gblIcon("blank");
                        }
                }


?>

<TR><TD>
<A HREF="<?= $info_url ?>" TITLE="View/Edit">
<?= $gblIcon($ext) ?></A></TD>
<TD CLASS=LST><?= $file_url_html ?></TD>
<TD CLASS=LST ALIGN=center><?= $b ?></TD>
<TD CLASS=LST ALIGN=left><?= $note_html ?></TD>
<TD CLASS=LST><?= date("$GLOBALS[gblDateFmt] $GLOBALS[gblTimeFmt]",$mod) ?></TD>
<TD CLASS=LST><?= $sz ?>Bytes</TD></TR>

<?php
          }  // iterate over files
        } else {  // end if no files
?>
 <TR><TD></TD><TD COLSPAN=5 CLASS=LST>
  No files in this directory
 </TD></TR>
<?
        }

        if ($emptyDir) {
?>

<FORM METHOD="POST" ACTION="<?= $self ?>">
 <TR><TD></TD><TD COLSPAN=5 CLASS=BAR>
  <INPUT TYPE="HIDDEN" NAME="DIR" VALUE="<?= $relDir ?>">
  OK TO DELETE THIS EMPTY FOLDER?
  <INPUT TYPE="CHECKBOX" NAME="CONFIRM"> 
  <INPUT TYPE="SUBMIT" NAME="POSTACTION" VALUE="DELETE">
 </TD></TR>
</FORM>

<?php
        } // end if emptyDir
?>

<TR><TD></TD><TD COLSPAN=5><HR></TD></TR>

<?
if (file_exists(".info.inc")) {
        print "<TR><TD></TD><TD COLSPAN=5>";
        include(".info.inc");
        print "</TD></TR>
        <TR><TD></TD><TD COLSPAN=5><HR></TD></TR>";
}
?>

<FORM METHOD="POST" ACTION="<?= $self ?>">
<TR><TD></TD><TD COLSPAN=5 CLASS=BAR>CREATE NEW
 <INPUT TYPE="RADIO" NAME="T" VALUE="D" CHECKED>DIRECTORY -OR- 
 <INPUT TYPE="RADIO" NAME="T" VALUE="F">FILE : &nbsp;&nbsp;
 <NOBR>NAME <INPUT TYPE="TEXT" NAME="FN" SIZE=14>
 <INPUT TYPE="HIDDEN" NAME="POSTACTION" VALUE="CREATE">
 <INPUT TYPE="HIDDEN" NAME="DIR" VALUE="<?= $relDir ?>">
 <INPUT TYPE="SUBMIT" VALUE="CREATE" NAME="CREATE">
 </NOBR> 
 <NOBR>OR <A HREF="<?= $self ?>?A=U&D=<?= urlencode($relDir) ?>">UPLOAD</A> A FILE
 </NOBR>
</TD></TR>
</FORM>
</TABLE>

<?php
        EndHTML() ;
} // end function Navigate

//////////////////////////////////////////////////////////////////

function UploadPage($fsRoot, $relDir, $filename="") {

        $self = $GLOBALS["PHP_SELF"] ;
        if ($relDir == "") $relDir = "/" ; 
?>

<P><TABLE BORDER=0 CELLPADDING=5><TR><TD WIDTH=5></TD><TD CLASS=BAR>
<FORM ENCTYPE="multipart/form-data" METHOD="POST" 
 ACTION="<?= $self ?>">
DESTINATION DIRECTORY:<B><?= " " . $relDir ?></B>
<? if (isset($filename) && $filename!="") { ?>
<br>DESTINATION FILE:<B><?= " " . $filename ?></B>
<INPUT TYPE="HIDDEN" NAME="FILENAME" VALUE="<?= $filename ?>">
<? } ?>
<P>PATHNAME OF LOCAL FILE<BR>
<INPUT TYPE="HIDDEN" NAME="DIR" VALUE="<?= $relDir ?>">
<INPUT TYPE="HIDDEN" NAME="POSTACTION" VALUE="UPLOAD">
<INPUT SIZE=30 TYPE="FILE" NAME="FN"></P>
<P><INPUT TYPE="SUBMIT" VALUE="UPLOAD"></P>
<P>If the <B>[BROWSE...]</B> button is not displayed,<BR>
you must upgrade to an RFC1867-compliant browser.</P>
<P>Your browser:<BR><?= $GLOBALS["HTTP_USER_AGENT"] ?></P>
</FORM>
</TD></TR>
<TR><TD></TD><TD>
<FORM METHOD="POST" ACTION="<?= $self ?>">
<INPUT TYPE="HIDDEN" NAME="DIR" VALUE="<?= $relDir ?>"><BR>
<INPUT TYPE="SUBMIT" NAME="POSTACTION" VALUE="CANCEL">
</FORM>
</TD></TR></TABLE></P>

<?php   
} // end function UploadPage

//////////////////////////////////////////////////////////////////

function Error($title,$text="") {
        StartHTML("(".$title.")",$text) ;
        echo "<P ALIGN=center>Hit your Browser's Back Button.</P>" ;
        EndHTML() ;
        exit ;
} // end function Error

//////////////////////////////////////////////////////////////////

function NoEntry() {

        $user = $GLOBALS["PHP_AUTH_USER"] ;
        $pw   = $GLOBALS["PHP_AUTH_PW"] ;       
        $self = $GLOBALS["PHP_SELF"] ;

        $title = "(401 Unauthorized)" ;
        $text  = "No trespassing !" ;
        StartHTML($title,$text) ;

        EndHTML() ;
        exit ;
}

//////////////////////////////////////////////////////////////////

function LogIt($target,$msg) {

        $dir=dirname($target);
        if (! file_exists($dir."/.log")) {
                mkdir($dir."/.log",0700);
        }
        $file=basename($target);

        $log=fopen("$dir/.log/$file","a+");
        fputs($log,date("$GLOBALS[gblDateFmt]\t$GLOBALS[gblTimeFmt]").
                "\t$GLOBALS[gblUserName]\t$msg\n");
        fclose($log);

}


//////////////////////////////////////////////////////////////////

function WriteNote($target,$msg) {

        $target=stripSlashes($target);
        $dir=dirname($target);
        if (! file_exists($dir."/.note")) {
                mkdir($dir."/.note",0700);
        }
        $file=basename($target);

        $note=fopen("$dir/.note/$file","w");
        fputs($note,"$msg\n");
        fclose($note);

        Logit($target,"added note $msg");

}

function ReadNote($target) {

        $target=stripSlashes($target);
        $dir=dirname($target);
        $file=basename($target);
        $msg="";
        if (file_exists($dir."/.note/$file")) {
                $note=fopen("$dir/.note/$file","r");
                $msg=fgets($note,4096);
                fclose($note);
        }
        return HtmlSpecialChars(StripSlashes($msg));

}

//////////////////////////////////////////////////////////////////

function MoveTo($source,$folder) {

        $source=stripSlashes($source);
        $file=basename($source);
        if (! file_exists($folder)) {
                mkdir($folder,0700);
        }
        if (file_exists($source)) {
                rename($source,"$folder/$file");
        }
}

//////////////////////////////////////////////////////////////////

function Lock($target) {

        $target=stripSlashes($target);
        $dir=dirname($target);
        if (! file_exists($dir."/.lock")) {
                mkdir($dir."/.lock",0700);
        }
        $file=basename($target);

        if (file_exists("$dir/.lock/$file")) {
                Logit($target,"attempt to locked allready locked file!");
        } else {
                $lock=fopen("$dir/.lock/$file","w");
                fputs($lock,"$GLOBALS[gblUserName]\n");
                fclose($lock);

                Logit($target,"file locked");
        }

}

function CheckLock($target) {

        $target=stripSlashes($target);
        $dir=dirname($target);
        $file=basename($target);
        $msg=0;
        if (file_exists($dir."/.lock/$file")) {
                $lock=fopen("$dir/.lock/$file","r");
                $msg=fgets($lock,4096);
                fclose($lock);
        }
        return chop($msg);

}

function Unlock($target) {

        $target=stripSlashes($target);
        $dir=dirname($target);
        $file=basename($target);
        if (file_exists($dir."/.lock/$file")) {
                unlink("$dir/.lock/$file");
                Logit($target,"file unlocked");
        } else {
                Logit($target,"attempt to unlocked non-locked file!");
        }

}

//////////////////////////////////////////////////////////////////

function urlpath($url) {
        $url=urlencode(StripSlashes("$url"));
        $url=str_replace("%2F","/",$url);
        $url=str_replace("+","%20",$url);
        return($url);
}

//////////////////////////////////////////////////////////////////

function safe_rename($fromdir,$fromfile,$tofile) {
        function try_rename($from,$to) {
#               print "$from -> $to\n";
                if (file_exists($from) && is_writeable(dirname($to))) {
                        rename($from,$to);
                }
        }

        function try_dir($todir) {
                if (! file_exists($todir)) {
                        mkdir($todir,0700);
                }
        }

        $to="$fromdir/$tofile";
        $todir=dirname($to);
        $tofile=basename($to);

#       print "<pre>$fromdir / $fromfile -> $todir / $tofile\n\n";

        try_rename("$fromdir/$fromfile","$todir/$tofile");
        try_dir("$todir/.log");
        try_rename("$fromdir/.log/$fromfile","$todir/.log/$tofile");
        try_dir("$todir/.note");
        try_rename("$fromdir/.note/$fromfile","$todir/.note/$tofile");
        try_dir("$todir/.lock");
        try_rename("$fromdir/.lock/$fromfile","$todir/.lock/$tofile");
        try_dir("$todir/.bak");
        for($i=0;$i<=$GLOBALS[gblNumBackups];$i++) {
                try_rename("$fromdir/.bak/$i/$fromfile","$todir/.bak/$i/$tofile");
        }
}


//////////////////////////////////////////////////////////////////

// recursivly delete directory

function rrmdir($dir) {
        $handle=opendir($dir);
        while ($file = readdir($handle)) {
                if ($file != "." && $file != "..") {
                        if (is_dir("$dir/$file"))
                                rrmdir("$dir/$file");
                        else
                                if (! @unlink("$dir/$file")) return(0);
                }
        }
        closedir($handle);
        return @rmdir($dir);
}

//////////////////////////////////////////////////////////////////

function ChangeLog($target,$msg) {

        global $gblFsRoot;
        $log=fopen("$gblFsRoot/.changelog","a+");
        if (substr($target,0,strlen($gblFsRoot)) == $gblFsRoot)
                $target=substr($target,strlen($gblFsRoot),strlen($target)-strlen($gblFsRoot));
        fputs($log,time()."\t$target\t$GLOBALS[gblUserName]\t$msg\n");
        fclose($log);

}

function DisplayChangeLog($day) {

        global $gblFsRoot;
        if (!file_exists("$gblFsRoot/.changelog")) return;
        $log=fopen("$gblFsRoot/.changelog","r");
        $logarr = array();
        while($line = fgetcsv($log,255,"\t")) {
                if ($day!=1 || ($day==1 && (time()-$line[0] < 24*60*60))) {
                        array_unshift($logarr,array($line[0],$line[1],$line[2],$line[3]));
                }
        }
        fclose($log);
        $cl1=" class=LST"; $cl2="";
        print "<table border=0 width=100%>\n";
        while ($e = array_shift($logarr)) {
                $cl=$cl1; $cl1=$cl2; $cl2=$cl;
                $date = date("$GLOBALS[gblDateFmt]", $e[0]);
                $time = date("$GLOBALS[gblTimeFmt]", $e[0]);
                $dir = dirname($e[1]);
                $file = basename($e[1]);
                print "<tr><td$cl>$date</td><td$cl>$time</td><td$cl><a href=\"$GLOBALS[PHP_SELF]?D=".urlencode($dir)."\">$dir</a>/$file</td><td$cl>$e[2]</td><td$cl>$e[3]</td></tr>\n";
        }
        print "</table>";
        print "<p>".GifIcon(up)." Back to <a href=$GLOBALS[PHP_SELF]>front page</a>.</p>";
}

//////////////////////////////////////////////////////////////////

// MAIN PROGRAM
// ============
// query parameters: capital letters
// local functions : begin with capital letters
// global constants: begin with gbl

        $gblFilePerms = 0640 ;         // default for new files
        $gblDirPerms  = 0750 ;          // default for new dirs

        // phpinfo() ;
        // exit ;

        // forks before authentication: style sheet and hash
        // creation if password not yet set.
        if ($STYLE == "get") { CSS() ; exit ; }

        $fsScriptDir  = dirname($SCRIPT_FILENAME) ;     
        // i.e. /home/httpd/html/docman

        // read user-defined configuration
        if (file_exists("$fsScriptDir/.docman.conf")) {
                include("$fsScriptDir/.docman.conf");
        }

        // where do we get users from?
        if (file_exists("$gblIncDir/$gblUsers.php")) {
                include("$gblIncDir/$gblUsers.php");
        } else {
                Error("Configuration error","Can't find user handling module at <tt>$gblIncDir/$gblUsers.php</tt> ! Please fix <tt>$fsScriptDir/.docman.conf</tt>");
        }

        // authentication failure
        if ( md5($PHP_AUTH_USER.$PHP_AUTH_PW) != $gblPw ||
                isset($relogin) && $gblPw == $relogin ) {
                header("WWW-authenticate: basic realm=\"$HTTP_HOST\"") ;
                header("HTTP/1.0 401 Unauthorized") ;
                NoEntry() ;
                exit ;
        }

        // get current directory relative to $gblFsRoot 
        $relDir = $DIR ;        // from POST
        if ($relDir == "") {    // not defined in POST ? 
                $relDir = urldecode($D) ;  // then use GET
        }       

        $relDir=stripSlashes($relDir);

        if ($relDir == "/") $relDir = "" ;      
        // default : website root = ""

        if (strstr($relDir,"..")) Error("No updirs allowed");

        // full paths contain "fs" or "Fs". Paths realitve to root of
        // website contain "rel" or "Rel". The script won't let you 
        // edit anything above directory equal to http://server.com 
        // i.e. below $gblFsRoot.

        $relScriptDir = dirname($SCRIPT_NAME) ;         
        // i.e. /docman

        // start on server root
//      $gblFsRoot = substr($fsScriptDir,0, strlen($fsScriptDir)-strlen($relScriptDir)) ;
        // or on script root
        $gblFsRoot = $fsScriptDir;
        // i.e. /home/httpd/html

        $fsDir = $gblFsRoot . $relDir ; // current directory
        if ( !is_dir($fsDir) ) Error("Dir not found",$relDir) ;

        if (isset($GLOBALS["HTTPS"]) && $GLOBALS["HTTPS"] == "on") {
                $webRoot  = "https://";
        } else {
                $webRoot  = "http://";
        }
        $webRoot .= $GLOBALS["HTTP_HOST"] . $relScriptDir;

        $FN=stripSlashes($FN);


        switch ($POSTACTION) {
        case "UPLOAD" :
                if (!is_writeable($fsDir)) Error("Write denied",$relDir) ;
                if (strstr($FN_name,"/")) 
                        Error("Non-conforming filename") ;
                // TODO : should rather check for escapeshellcmds
                // but maybe RFC 18xx asserts safe filenames ....
                $source = $FN ;
                if (! file_exists($source)) {
                        Error("You must select file with browse to upload it!");
                }
                if (! isset($FILENAME)) {       // from update file
                        $target = "$fsDir/$FN_name" ;
                } else {
                        $target = "$fsDir/$FILENAME";
                }

                // backup old files first
                $dir=dirname($target);
                if (! file_exists($dir."/.bak")) {
                        mkdir($dir."/.bak",0700);
                }
                if (! file_exists($dir."/.bak/$GLOBALS[gblNumBackups]")) {
                        mkdir($dir."/.bak/$GLOBALS[gblNumBackups]",0700);
                }
                $file=basename($target);
                for($i=$GLOBALS[gblNumBackups]-1;$i>0;$i--) {
                        MoveTo("$dir/.bak/$i/$file","$dir/.bak/".($i+1)."/");
                }
                MoveTo($target,$dir."/.bak/1/");

                copy($source,$target) ;
                chmod($target,$gblFilePerms) ;
                clearstatcache() ;
                Logit($target,"uploaded");
                if (isset($FILENAME)) {
                        Unlock($target);
                }
                ChangeLog($target,"updated");
                break ;

        case "SAVE" :
                $path = $gblFsRoot . $RELPATH ;
                $path=stripSlashes($path);
                $writable = is_writeable($path) ;
                $legaldir = is_writeable(dirname($path)) ;
                $exists   = (file_exists($path)) ? 1 : 0 ; 
// check for legal extension here as well
                if (!($writable || (!$exists && $legaldir))) 
                        Error("Write denied",$RELPATH) ;
                $fh = fopen($path, "w") ;
                $FILEDATA=stripSlashes($FILEDATA);
                fwrite($fh,$FILEDATA) ;
                fclose($fh) ;
                clearstatcache() ;
                Logit($path,"saved changes");
                ChangeLog($path,"saved changes");
                break ;

        case "CREATE" :
                // we know $fsDir exists
                if ($FN == "") break;           // no filename!
                if (!is_writeable($fsDir)) Error("Write denied",$relDir) ;
                $path = $fsDir . "/" . $FN ;  // file or dir to create
                $relPath = $relDir . "/" . $FN ;
                switch ( $T ) {
                case "D" :  // create a directory
                        if ( ! @mkdir($path,$gblDirPerms) ) 
                                Error("Mkdir failed",$relPath) ; // eg. if it exists
                        clearstatcache() ;
                        break ;
                case "F" :  // create a new file
// this functionality is doubled in DetailView().
// better keep it here altogether
// chmod perms to $gblFilePerms
                        if ( file_exists($path) && !is_writeable($path) ) 
                                Error("File not writable", $relPath) ;
                        $fh = fopen($path, "w+") ;
                        if ($fh) {
                                fputs($fh,"\n");
                                fclose($fh) ;
                                LogIt($path,"file created");
                        } else {
                                Error("Creation of file $relPath failed -- $path");
                        }
                        $tstr = "$PHP_SELF?A=E&D=".urlencode($relDir)."&F=".urlencode($FN) ;
                        header("Location: " . $tstr) ;
                        ChangeLog($target,"created");
                        exit ;
                }
                break ;

        case "DELETE" :  
                if ( $CONFIRM != "on" ) break ;

                $tstr  = "Attempt to delete non-existing object or " ;
                $tstr .= "insufficient privileges: " ;

                if ( $FN != "") {  // delete file
                        $path =  $fsDir . "/" . $FN ;
                
                        $dir=dirname($path);
                        $file=basename($path);
                        if (! file_exists("$dir/.del")) {
                                mkdir("$dir/.del",0700);
                        }

//                      if ( ! @unlink($path) ) { 
                        if ( ! rename($path,"$dir/.del/$file") ) { 
                                Error("File delete failed", $tstr . $path) ; 
                                Logit($path,"file delete failed");
                                exit ; 
                        } else {
                                Logit($path,"file deleted");
                                MoveTo("$dir/.log/$file","$dir/.del/.log/");
                                MoveTo("$dir/.note/$file","$dir/.del/.note/");
                                MoveTo("$dir/.lock/$file","$dir/.del/.lock/");
                        }
                }
                else {  // delete directory
                  if ( ! @rrmdir($fsDir) ) {
                    Error("Rmdir failed", $tstr . $fsDir) ; 
                  }
                  else {
                    $relDir = dirname($relDir) ;  // move up
                  }
                }
                break ;

        case "UNDELETE" :  
                if ( $CONFIRM != "on" ) break ;

                if (substr($FN,0,4) != ".del") break ;
                $file=substr($FN,4,strlen($FN)-4);

                Logit("$fsDir/.del/$file","undeleted");
                MoveTo("$fsDir/.del/$file","$fsDir/");
                MoveTo("$fsDir/.del/.log/$file","$fsDir/.log/");
                MoveTo("$fsDir/.del/.note/$file","$fsDir/.note/");
                MoveTo("$fsDir/.del/.lock/$file","$fsDir/.lock/");

                break ;

        case "RENAME" :  
                if ( $CONFIRM != "on" ) break ;

                Logit("$fsDir/$FN","renamed $FN to $NEWNAME");
                safe_rename($fsDir,$FN,$NEWNAME);
                break ;

        case "NOTE" :  
                WriteNote("$fsDir/$FN","$NOTE");
                break ;

        case "UNLOCK" :  
                if ( $CONFIRM != "on" ) break ;
                Unlock("$fsDir/$FN");
                break ;

        default :
                // user hit "CANCEL" or undefined action
        }

        // common to all POSTs : redirect to directory view ($relDir)
        if ( $POSTACTION != "" ) { 
                $tstr = $PHP_SELF . "?D=" . urlencode($relDir) ;
                header("Location: " . $tstr) ;   
                exit ;
        }
        
        // check for mode.. navigate, code display, upload, or detail?
        // $A=U : upload to path given in $D
        // $A=E : display detail of file $D/$F and edit
        // $A=C : display code in file $D/$F
        // $A=Co : checkout file $D/$F
        // $A=Ci : checkin file $D/$F
        // $A=V : view file (do nothing except log)
        // default : display directory $D

        switch ($A) {
        case "U" :
                // upload to $relDir
                if (!is_writeable($gblFsRoot . $relDir)) 
                        Error("Write access denied",$relDir) ;
                $text  = "Use this page to upload a single " ;
                $text .= "file to <B>$HTTP_HOST</B>." ;
                StartHTML("(Upload Page)", $text) ;
                UploadPage($gblFsRoot, $relDir) ;
                EndHTML() ;
                exit ;
        case "E" :
                $F=stripSlashes($F);
                // detail of $relDir/$F
                if (is_file("$gblFsRoot/$relDir/$F") || is_dir("$gblFsRoot/$relDir/$F")) DetailPage($gblFsRoot, $relDir, $F) ;
                exit ;
        case "C" :
                $F=stripSlashes($F);
                // listing of $relDir/$F 
                DisplayCode($gblFsRoot, $relDir, $F) ;
                exit ;
        case "Co" :
                // checkout
                Lock("$gblFsRoot/$relDir/$F");
                header("Content-Disposition: attachment; filename=$F" );
                Header("Location: $webRoot".urlpath("$relDir/$F"));
                exit;
        case "Ci" :
                $F=stripSlashes($F);
                // upload && update to $relDir
                if (!is_writeable($gblFsRoot . $relDir)) 
                        Error("Write access denied",$relDir) ;
                $text  = "Use this page to update a single " ;
                $text .= "file to <B>$HTTP_HOST</B>." ;
                StartHTML("(Update file Page)", $text) ;
                UploadPage($gblFsRoot, $relDir, $F) ;
                EndHTML() ;
                exit ;
        case "V" :
                // view
                LogIt("$gblFsRoot/$relDir/$F","viewed");
                header("Content-Disposition: attachment; filename=$F" );
                Header("Location: $webRoot".urlpath("$relDir/$F"));
                exit;
        case "Ch" :
                StartHTML("(File changes)","All changes chronologicaly...");
                DisplayChangeLog(0);    // all
                EndHTML() ;
                exit;
        case "Ch1" :
                StartHTML("(File changes)","Changes to files in last day...");
                DisplayChangeLog(1);
                EndHTML() ;
                exit;
        }

        // default: display directory $relDir
        Navigate($gblFsRoot,$relDir) ;  
        exit ;

        Error("Whooah!","By cartesian logic, this never happens") ;
?>