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use popen programming
育龙网 WWW.CHINA-B.C0M 2009年06月12日 来源：互联网
育龙网核心提示： use popen ====================================================================from: NAMEpopen - initiate pipe streams t
use popen
====================================================================
from:
NAME
popen - initiate pipe streams to or from a process
SYNOPSIS
#include <stdio.h>
FILE popen;
DESCRIPTION
Thepopenfunction executes the command specified by the stringcommand.It creates a pipe between the calling program and the executed command， andreturns a pointer to a stream that can be used to either read from or write tothe pipe.
If the implementation supports the referenced XCU specification， the environment of theexecuted command will be as if a child process were created within thepopencall usingfork，and the child invoked theshutility using the call:
