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<?php
/*
This file is part of DocBookWiki. DocBookWiki is a web application
that displays and edits DocBook documents.
Copyright (C) 2004, 2005, 2006, 2007
Dashamir Hoxha, dashohoxha@users.sourceforge.net
DocBookWiki is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
DocBookWiki is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with DocBookWiki; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
*/
/**
* This file has some general functions.
*/
/** Execute a shell command, checking it first for invalid input. */
function shell($cmd)
{
//some basic check for invalid input
$cmd = ereg_replace(';.*', '', $cmd);
$cmd .= ' 2>&1';
$data_owner = DATA_OWNER;
$output = shell_exec("sudo -u $data_owner $cmd");
//print "<xmp>sudo -u $data_owner $cmd \n----- \n$output</xmp>\n"; //debug
return $output;
}
/**
* Write the content to the file. It is done using a temporary file
* and copy, in order to belong to the data_owner.
*/
function write_file($fname, &$fcontent)
{
//create the directories in the path, in case they do not exist
shell('mkdir -p '.dirname($fname));
//write the content to a temporary file
$tmp_fname = write_tmp_file($fcontent);
//copy the temporary file to the fname
shell("cp $tmp_fname $fname");
//delete the temporary file
unlink($tmp_fname);
}
/**
* Write the given file content to a temporary file and
* make the temporary file read-writable by everybody.
* Return the name of the temporary file.
*/
function write_tmp_file(&$fcontent)
{
//get the name of a temporary file
$tmpfile = tempnam('/tmp', 'dbwiki_');
//open the file and write the content
$fp = fopen($tmpfile, 'w');
fputs($fp, $fcontent);
fclose($fp);
//make the file read-writeable by everybody
chmod($tmpfile, 0666);
//return the name of the file
return $tmpfile;
}
/**
* Converts an associative array to a string
* like this: key1="value1", key2="value2"
*/
function array2str($assoc_array)
{
while ( list($key, $value) = each($assoc_array) )
{
$str_array[] = "$key=\"$value\"";
}
return implode(', ', $str_array);
}
?>
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