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# posix_setgid

(PHP 3 >= 3.0.13, PHP 4, PHP 5)

posix_setgid -- Set the GID of the current process

## 说明

bool posix_setgid ( int gid )

Set the real group ID of the current process. This is a privileged function and you need appropriate privileges (usually root) on your system to be able to perform this function. The appropriate order of function calls is posix_setgid() first, posix_setuid() last.

## 参数

`gid`

  The group id.

## 返回值

如果成功则返回 `TRUE`，失败则返回 `FALSE`。

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