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rewrite query to support both mysql/sqlite

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Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>
This commit is contained in:
Eli Schwartz 2021-02-16 22:09:36 -05:00 • committed by Lukas Fleischer
parent be5197a5fe
commit 71740a75a2
1 changed files with 5 additions and 9 deletions
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14
web/lib/acctfuncs.inc.php
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@ -597,21 +597,17 @@ function try_login() {
/* Generate a session ID and store it. */
while (!$logged_in && $num_tries < 5) {
$session_limit = config_get_int('options', 'max_sessions_per_user');
# FIXME: this does not work for sqlite (JOIN in a DELETE clause)
# hence non-prod instances can have a naughty amount of simultaneous logins
if ($backend == "mysql" && $session_limit) {
if ($session_limit) {
/*
* Delete all user sessions except the
* last ($session_limit - 1).
*/
$q = "DELETE s.* FROM Sessions s ";
$q.= "LEFT JOIN (SELECT SessionID FROM Sessions ";
$q = "DELETE FROM Sessions ";
$q.= "WHERE UsersId = " . $userID . " ";
$q.= "AND SessionID NOT IN (SELECT SessionID FROM Sessions ";
$q.= "WHERE UsersID = " . $userID . " ";
$q.= "ORDER BY LastUpdateTS DESC ";
$q.= "LIMIT " . ($session_limit - 1) . ") q ";
$q.= "ON s.SessionID = q.SessionID ";
$q.= "WHERE s.UsersId = " . $userID . " ";
$q.= "AND q.SessionID IS NULL;";
$q.= "LIMIT " . ($session_limit - 1) . ")";
$dbh->query($q);
}