回复：用php为iptables写简单的web界面如何调用shell或者获root权限

上面文件 /var/www/html/ip.c
gcc -o ip -Wall ip.c
chmod u+s ./ip
ll
-rwsr-xr-x. 1 root root 5323 3月 31 08:17 ip

<?php
echo '<pre>';
$last_line = system('/var/www/html/http/ip', $retval);
echo '
</pre>
<hr />Last line of the output: ' . $last_line . '
<hr />Return value: ' . $retval;
?>

可是 浏览器：ip/ip.php
只有这些。。。
.....................................................................
Last line of the output:
......................................................................
Last line of the output:Return value:127

Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
my uid :48my euid :0
after setreuid uid :0
afer sertreuid euid :48
Last line of the output:afer sertreuid euid :48
Return value:0

第一次看到php是怎么写的