本书全面介绍了UNIX系统的程序设计界面—系统调用界面和标准C库提供的许多函数。 本书的前15章着重于理论知识的阐述，主要内容包括UNIX文件和目录、进程环境、进程控制、进程间通信以及各种I/O。在此基础上，分别按章介绍了多个应用实例，包括如何创建数据库函数库，Postscr ipt 打印机驱动程序，调制解调器拨号器及在伪终端上运行其他程序的程序等。 本书内容丰富权威，概念清晰精辟，一直以来被誉为UNIX编程的“圣经”，对于所有UNIX程序员—无论是初学者还是专家级人士—都是一本无价的参考书籍。-This book has a comprehensive introduction of programming interface UNIX system call- interface and standard C library provides many functions. The book before chapter 15 focuses on the theoretical knowledge, main contents include the UNIX files and directories, process control, the process of environment, inter-process communication and the I/O. On this basis, the chapter multiple applications, including how to create the database function Postscr ipt printer driver, modems dialer and pseudo terminal operation in other programs, etc. This rich content, clear concept and insightful, authorities have been known as the "bible" UNIX programming, for all the UNIX programmer- both beginners or expert professionals- is an invaluable reference books.