说明：  不是基于SVR4的unix系统编程，一本对unix编程者绝对有用的书，我找n久才找在超星找到的，不过我把它做成了pdf了，里面的每个函数都有例子讲得清清楚楚，适合学习unix系统编程者尤其是初学者。
(not based on the SVR4 Unix programming, one pair of unix programmers absolutely useful, find me a long time to find n Superstar find in, but I put it into a pdf. inside each function have examples speak clearly, learning unix systems for programming, particularly for beginners.)