ctrlpocess.c

此源码是著名的教材BeginningLinux Programming中文名字叫Linux程序设计书中的源代码

#include <stdio.h>
#include <unistd.h>

int main(int arg, char * argv[])
{
	int	  n;
	char  buf[1024];

	while (1)
	{
		if ((n = read (0, buf, 1024)) > 0)  // 标准输入stdin的描述符为0
		{
			buf[n] = '\0';
			printf ("ctrlprocess receive: %s\n",buf);

			if (!strcmp (buf,"exit"))
				exit(0);

			if (!strcmp (buf, "getpid"))
			{
				printf ("My pid:%d\n", getpid());
				sleep (3);
				exit (0);
			}
		}
	}
}