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Linux系统调用

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<TITLE>Syscall specifications of Linux - getpid</TITLE>
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<H3>SYNOPSIS</H3>
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<CODE>pid_t getpid(void);</CODE>
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<CODE>pid_t getppid(void);</CODE>
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<H3>DESCRIPTION</H3>
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<CODE>getpid</CODE> returns the process id of the current task and
<CODE>getppid</CODE> returns the process id of the parent task.
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<H3>RETURN VALUE</H3>
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<CODE>getpid</CODE>: the pid of the current task.
<CODE>getppid</CODE>: the pid of the parent task.
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