function mimedefang_tmpfs_mount($size)
{
$sock = new sockets();
$unix = new unix();
$TMPDIR = "/var/spool/MIMEDefang";
if (!is_dir($TMPDIR)) {
@mkdir($TMPDIR, 0755, true);
}
@chown($TMPDIR, "postfix");
@chgrp($TMPDIR, "postfix");
$idbin = $unix->find_program("id");
$mount = $unix->find_program("mount");
$umount = $unix->find_program("umount");
$rm = $unix->find_program("rm");
if (strlen($idbin) < 3) {
echo "Starting mimedefang: tmpfs `id` no such binary\n";
return;
}
if (strlen($mount) < 3) {
echo "Starting mimedefang: tmpfs `mount` no such binary\n";
return;
}
exec("{$idbin} postfix 2>&1", $results);
if (!preg_match("#uid=([0-9]+).*?gid=([0-9]+)#", @implode("", $results), $re)) {
echo "Starting......: " . date("H:i:s") . "MySQL mysql no such user...\n";
return;
}
$uid = $re[1];
$gid = $re[2];
echo "Starting mimedefang: tmpfs uid/gid ={$uid}:{$gid} for {$size}M\n";
mimedefang_tmpfs_umount();
shell_exec("{$rm} -rf {$TMPDIR}/* >/dev/null 2>&1");
$cmd = "{$mount} -t tmpfs -o rw,uid={$uid},gid={$gid},size={$size}M,nr_inodes=10k,mode=0700 tmpfs \"{$TMPDIR}\"";
shell_exec($cmd);
$mounted = mysql_tmpfs_ismounted($uid);
if (mysql_tmpfs_ismounted()) {
echo "Starting mimedefang: {$TMPDIR}(tmpfs) for {$size}M success\n";
} else {
echo "Starting mimedefang: tmpfs for {$size}M failed, it will return back to disk\n";
}
}
function mysql_tmpfs_umount($uid)
{
$unix = new unix();
$idbin = $unix->find_program("id");
$mount = $unix->find_program("mount");
$umount = $unix->find_program("umount");
$rm = $unix->find_program("rm");
exec("{$idbin} mysql 2>&1", $results);
if (!preg_match("#uid=([0-9]+).*?gid=([0-9]+)#", @implode("", $results), $re)) {
echo "Starting......: " . date("H:i:s") . "MySQL mysql no such user...\n";
return;
}
$uid = $re[1];
$gid = $re[2];
if (!is_numeric($uid)) {
echo "Starting......: " . date("H:i:s") . " MySQL tmpfs uid is not a numeric, aborting umounting task\n";
return;
}
$mounted = mysql_tmpfs_ismounted($uid);
$c = 0;
while (strlen($mounted) > 3) {
if (strlen($mounted) > 3) {
echo "Starting......: " . date("H:i:s") . "MySQL umount({$uid}) {$mounted}\n";
shell_exec("{$umount} -l \"{$mounted}\"");
$c++;
}
if ($c > 20) {
break;
}
$mounted = mysql_tmpfs_ismounted($uid);
}
}
