PHP 5.6.0RC3 is available

posix_setgid

(PHP 4, PHP 5)

posix_setgidSet the GID of the current process

Descrição

bool posix_setgid ( int $gid )

Set the real group 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. The appropriate order of function calls is posix_setgid() first, posix_setuid() last.

Nota:

If the caller is a super user, this will also set the effective group id.

Parâmetros

gid

The group id.

Valor Retornado

Retorna TRUE em caso de sucesso ou FALSE em caso de falha.

Exemplos

Exemplo #1 posix_setgid() example

This example will print out the effective group id, once it is changed.

<?php
echo 'My real group id is '.posix_getgid(); //20
posix_setgid(40);
echo 
'My real group id is '.posix_getgid(); //40
echo 'My effective group id is '.posix_getegid(); //40
?>

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User Contributed Notes 1 note

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jac
3 years ago
if you're going to use this along with posix_setuid, make sure you call posix_setgid first:

<?php
define
(PROC_USER, 'john');
define (PROC_GRP, 'admins');
?>

following works:

<?php
$user
= posix_getpwnam( PROC_USER );
$group = posix_getgrnam( PROC_GRP);

echo
posix_getuid()."\n";
echo
posix_getgid()."\n";

posix_setgid($group['gid']);
posix_setuid($user['uid']);

echo
posix_getuid()."\n";
echo
posix_getgid()."\n";
?>

following will not set gid

<?php
$user
= posix_getpwnam( PROC_USER );
$group = posix_getgrnam( PROC_GRP);

echo
posix_getuid()."\n";
echo
posix_getgid()."\n";

posix_setuid($user['uid']);
posix_setgid($group['gid']);

echo
posix_getuid()."\n";
echo
posix_getgid()."\n";
?>
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