posix_seteuid

(PHP 4 >= 4.0.2, PHP 5, PHP 7)

posix_seteuidSet the effective UID of the current process

설명

bool posix_seteuid ( int $uid )

Set the real user ID of the current process. This is a privileged function and needs appropriate privileges (usually root) on the system to be able to perform this function.

인수

uid

The user id.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

참고

add a note add a note

User Contributed Notes 1 note

up
0
divinity76 at gmail dot com
1 year ago
if you want to set uid by username rather than uid, try combining it with posix_getpwnam(),

<?php
posix_seteuid
(posix_getpwnam("www-data")["uid"]);
posix_setegid(posix_getpwnam("www-data")["gid"]);
?>

note that posix_getpwnam() reads /etc/passwd on each invocation, if you need it to go fast, this should be faster (only read passwd once):
<?php
$posix_user_info
=posix_getpwnam("www-data");
posix_seteuid ($posix_user_info["uid"]);
posix_setegid($posix_user_info["gid"]);
?>

and to go back to being root, just set them to 0,

<?php
posix_seteuid
(0);
posix_setegid(0);
?>
To Top