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<?php
/* $Id: check_user_privileges.lib.php,v 1.2 2005/07/24 12:00:48 nijel Exp $ */
// vim: expandtab sw=4 ts=4 sts=4:
// Get user's global privileges ($dbh and $userlink are links to MySQL
// defined in the "common.lib.php" library)
// Note: if no controluser is defined, $dbh contains $userlink
$is_create_priv = FALSE;
$is_process_priv = TRUE;
$is_reload_priv = FALSE;
$db_to_create = '';
// We were trying to find if user if superuser with 'USE mysql'
// but users with the global priv CREATE TEMPORARY TABLES or LOCK TABLES
// can do a 'USE mysql' (even if they cannot see the tables)
$is_superuser = PMA_DBI_try_query('SELECT COUNT(*) FROM mysql.user', $userlink, PMA_DBI_QUERY_STORE);
function PMA_analyseShowGrant($rs_usr, &$is_create_priv, &$db_to_create, &$is_reload_priv) {
$re0 = '(^|(\\\\\\\\)+|[^\])'; // non-escaped wildcards
$re1 = '(^|[^\])(\\\)+'; // escaped wildcards
while ($row = PMA_DBI_fetch_row($rs_usr)) {
$show_grants_dbname = substr($row[0], strpos($row[0], ' ON ') + 4,(strpos($row[0], '.', strpos($row[0], ' ON ')) - strpos($row[0], ' ON ') - 4));
$show_grants_dbname = ereg_replace('^`(.*)`','\\1', $show_grants_dbname);
$show_grants_str = substr($row[0],6,(strpos($row[0],' ON ')-6));
if (($show_grants_str == 'ALL') || ($show_grants_str == 'ALL PRIVILEGES') || ($show_grants_str == 'CREATE') || strpos($show_grants_str, 'CREATE')) {
if ($show_grants_dbname == '*') {
$is_create_priv = TRUE;
$is_reload_priv = TRUE;
$db_to_create = '';
break;
} // end if
else if ( (ereg($re0 . '%|_', $show_grants_dbname)
&& !ereg('\\\\%|\\\\_', $show_grants_dbname))
|| (!PMA_DBI_try_query('USE ' . ereg_replace($re1 .'(%|_)', '\\1\\3', $show_grants_dbname)) && substr(PMA_DBI_getError(), 1, 4) != 1044)
) {
$db_to_create = ereg_replace($re0 . '%', '\\1...', ereg_replace($re0 . '_', '\\1?', $show_grants_dbname));
$db_to_create = ereg_replace($re1 . '(%|_)', '\\1\\3', $db_to_create);
$is_create_priv = TRUE;
break;
} // end elseif
} // end if
} // end while
} // end function
// Detection for some CREATE privilege.
// Since MySQL 4.1.2, we can easily detect current user's grants
// using $userlink (no control user needed)
// and we don't have to try any other method for detection
if (PMA_MYSQL_INT_VERSION >= 40102) {
$rs_usr = PMA_DBI_try_query('SHOW GRANTS', $userlink, PMA_DBI_QUERY_STORE);
if ($rs_usr) {
PMA_analyseShowGrant($rs_usr,$is_create_priv, $db_to_create, $is_reload_priv);
PMA_DBI_free_result($rs_usr);
unset($rs_usr);
}
} else {
// Before MySQL 4.1.2, we first try to find a priv in mysql.user. Hopefuly
// the controluser is correctly defined; but here, $dbh could contain
// $userlink so maybe the SELECT will fail
if (!$is_create_priv) {
$res = PMA_DBI_query('SELECT USER();');
list($mysql_cur_user_and_host) = PMA_DBI_fetch_row($res);
$mysql_cur_user = substr($mysql_cur_user_and_host, 0, strrpos($mysql_cur_user_and_host, '@'));
$local_query = 'SELECT Create_priv, Reload_priv FROM mysql.user WHERE ' . PMA_convert_using('User') . ' = ' . PMA_convert_using(PMA_sqlAddslashes($mysql_cur_user), 'quoted') . ' OR ' . PMA_convert_using('User') . ' = ' . PMA_convert_using('', 'quoted') . ';';
$rs_usr = PMA_DBI_try_query($local_query, $dbh); // Debug: or PMA_mysqlDie('', $local_query, FALSE);
if ($rs_usr) {
while ($result_usr = PMA_DBI_fetch_assoc($rs_usr)) {
if (!$is_create_priv) {
$is_create_priv = ($result_usr['Create_priv'] == 'Y');
}
if (!$is_reload_priv) {
$is_reload_priv = ($result_usr['Reload_priv'] == 'Y');
}
} // end while
PMA_DBI_free_result($rs_usr);
unset($rs_usr, $result_usr);
} // end if
} // end if
// If the user has Create priv on a inexistant db, show him in the dialog
// the first inexistant db name that we find, in most cases it's probably
// the one he just dropped :)
if (!$is_create_priv) {
$local_query = 'SELECT DISTINCT Db FROM mysql.db WHERE ' . PMA_convert_using('Create_priv') . ' = ' . PMA_convert_using('Y', 'quoted') . ' AND (' . PMA_convert_using('User') . ' = ' .PMA_convert_using(PMA_sqlAddslashes($mysql_cur_user), 'quoted') . ' OR ' . PMA_convert_using('User') . ' = ' . PMA_convert_using('', 'quoted') . ');';
$rs_usr = PMA_DBI_try_query($local_query, $dbh, PMA_DBI_QUERY_STORE);
if ($rs_usr) {
$re0 = '(^|(\\\\\\\\)+|[^\])'; // non-escaped wildcards
$re1 = '(^|[^\])(\\\)+'; // escaped wildcards
while ($row = PMA_DBI_fetch_assoc($rs_usr)) {
if (ereg($re0 . '(%|_)', $row['Db'])
|| (!PMA_DBI_try_query('USE ' . ereg_replace($re1 . '(%|_)', '\\1\\3', $row['Db'])) && substr(PMA_DBI_getError(), 1, 4) != 1044)) {
$db_to_create = ereg_replace($re0 . '%', '\\1...', ereg_replace($re0 . '_', '\\1?', $row['Db']));
$db_to_create = ereg_replace($re1 . '(%|_)', '\\1\\3', $db_to_create);
$is_create_priv = TRUE;
break;
} // end if
} // end while
PMA_DBI_free_result($rs_usr);
unset($rs_usr, $row, $re0, $re1);
} // end if
else {
// Finally, let's try to get the user's privileges by using SHOW
// GRANTS...
// Maybe we'll find a little CREATE priv there :)
$rs_usr = PMA_DBI_try_query('SHOW GRANTS FOR ' . $mysql_cur_user_and_host . ';', $dbh, PMA_DBI_QUERY_STORE);
if (!$rs_usr) {
// OK, now we'd have to guess the user's hostname, but we
// only try out the 'username'@'%' case.
$rs_usr = PMA_DBI_try_query('SHOW GRANTS FOR ' . $mysql_cur_user . ';', $dbh, PMA_DBI_QUERY_STORE);
}
unset($local_query);
if ($rs_usr) {
PMA_analyseShowGrant($rs_usr,$is_create_priv, $db_to_create, $is_reload_priv);
PMA_DBI_free_result($rs_usr);
unset($rs_usr);
} // end if
} // end elseif
} // end if
} // end else (MySQL < 4.1.2)
// If disabled, don't show it
if (!$cfg['SuggestDBName']) {
$db_to_create = '';
}
?>