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Introduction
This book describes the programming interface to the Unix systemthe system call interface and many of the functions provided in the standard C library. It is intended for anyone writing programs that run under Unix.
Like most operating systems, Unix provides numerous services to the programs that are runningopen a file, read a file, start a new program, allocate a region of memory, get the current time-of-day, and so on. This has been termed the system call interface. Additionally, the standard C library provides numerous functions that are used by almost every C program (format a variable's value for output, compare two strings, etc.).
The system call interface and the library routines have traditionally been described in Sections 2 and 3 of the Unix Programmer's Manual. This book is not a duplication of these sections. Examples and rationale are missing from the Unix Programmer's Manual, and that's what this book provides.
简介
本书介绍了UNIX嵌入式系统调用接口的API和许多在标准C库提供的功能。它的受众是针对在UNIX上些UNIX程序的任何人。像大多数嵌入式系统OS一样，Unix提供了大量的服务，程序runningopen文件，读取文件，开始新的计划，分配存储区，得到当前时间，等等。这被称为系统调用接口。
此外，标准C库提供了许多功能，用几乎每一个C程序（输出格式，一个变量的值，比较两个字符串，等）。
系统调用接口和程序库被描述在UNIX程序员手册的section 2和3。这本书不重复这些章节。UNIX程序员手册中缺失实例和理论，这些在这本书里将提供。
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发表于 2014-5-14 00:55:48
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