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详细说明： This book is broken into 11 chapters and two appendices. Chapter 1, Introduction and Essential Concepts This chapter serves as an introduction, providing an overview of Linux, system programming, the kernel, the C library, and the C compiler. Even advanced users should visit this chapter. Chapter 2, File I/O This chapter introduces files, the most important abstraction in the Unix environment, and file I/O, the basis of the Linux programming mode. It covers reading from and writing to files, along with other basic file I/O opera tions. The chapter culminates with a discussion on how the Linux kernel implements and manages files. Chapter 3, Buffered I/O This chapter discusses an issue with the basic file I/O interfaces—buffer size management— and introduces buffered I/O in general, and standard I/O in particular, as solutions. Chapter 4, Advanced File I/O This chapter completes the I/O troika with a treatment on advanced I/O interfaces, memory mappings, and optimization techniques. The chapter is capped with a discussion on avoiding seeks and the role of the Linux kernel’s I/O scheduler. Chapter 5, Process Management This chapter introduces Unix’s second most important abstraction, the process, and the family of system calls for basic process management, including the venerable fork. Chapter 6, Advanced Process Management This chapter continues the treatment with a discussion of advanced process management, including real-time processes. Chapter 7, Threading This chapter discusses threads and multithreaded programming. It focuses on higher-level design concepts. It includes an introduction to the POSIX threading API, known as Pthreads. Chapter 8, File and Directory Management This chapter discusses creating, moving, copying, deleting, and otherwise managing files and directories. Chapter 9, Memory Management This chapter covers memory management. It begins by introducing Unix concepts of memory, such as the process address space and the page, and continues with a discussion of the interfaces for obtaining memory from and returning memory to the kernel. The chapter concludes with a treatment on advanced memory-related interfaces. Chapter 10, Signals This chapter covers signals. It begins with a discussion of signals and their role on a Unix system. It then covers signal interfaces, starting with the basic and concluding with the advanced. Chapter 11, Time This chapter discusses time, sleeping, and clock management. It covers the basic interfaces up through POSIX clocks and high-resolution timers. Appendix A The first appendix reviews many of the language extensions provided by gcc and GNU C, such as attributes for marking a function constant, pure, or inline. Appendix B This bibliography of recommended reading lists both useful supplements to this work, and books that address prerequisite topics not covered herein. ...展开收缩
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