Master the system calls at the heart of today's UNIX and Linux systems: the programming interfaces that drive the UNIX and Linux kernels and run everything from filesystems and multitasking to interprocess communication. A thorough knowledge of system calls is essential for every UNIX and Linux programmer -- and for 20 years, W. Richard Stevens' Advanced Programming in the Unix Environment has delivered that. Now, Stephen Rago has completely updated this classic to reflect modern distributions including Red Hat 2.6.x, Solaris 10 3, OS X 10.5.4, FreeBSD 7.0.5 -- and for the first time, Ubuntu. As in previous editions, Rago begins with essentials such as file and process control, carefully laying the groundwork for more advanced techniques. He supports his crystal-clear explanations with nearly 10,000 lines of code, all carefully tested on each of these leading versions and distributions. Rago begins with an up-to-date overview of the UNIX System, its standardization processes, and its diverse implementations. Next, he introduces file I/O, files, directories, and the Standard I/O Library. You'll walk through working with UNIX/Linux system data files and information... controlling the process environment and its relationships... using signals, threads, and daemon processes... mastering advanced I/O techniques, interprocess communication, sockets, and advanced IPC... using Terminal I/O and Pseudo Terminals... working with database libraries, communicating with network printers, and much more. Appendices provide essential information on function prototypes, miscellaneous source code, and solutions to many of this guide's exercises. For all intermediate-to-advanced level UNIX programmers and software engineers. The new third edition of Advanced Programming in the UNIX® Environment supports today's leading platforms, reflects new technical advances and best practices, and aligns with Version 4 of the Single UNIX Specification. This valuable tool begins with files, directories, and processes, carefully laying the groundwork for more advanced techniques, such as signal handling and terminal I/O then thoroughly covers threads and multithreaded programming, and socket-based IPC. This edition covers more than seventy new interfaces, including POSIX asynchronous I/O, spin locks, barriers, and POSIX semaphores. Students are given examples, including more than ten thousand lines of downloadable, ISO C source code. More than four hundred system calls and functions are demonstrated with concise, complete programs that clearly illustrate their usage, arguments, and return values. To tie together what they've learned, the book presents several chapter-length case studies, each reflecting contemporary environments.