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# posix_getsid

(PHP 3 >= 3.0.10, PHP 4, PHP 5)

posix_getsid -- Get the current sid of the process

## 说明

int posix_getsid ( int pid )

Return the sid of the process `pid`.

## 参数

`pid`

  The process identifier. If set to 0, the current process is assumed.

## 返回值

Returns the identifier, as an integer.

## 注释

> 注意: This is not a POSIX function, but is common on System V systems. If your system does not support this function at system level, this PHP function will always return `FALSE`.

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