By W. Richard Stevens, Stephen A. Rago

For greater than two decades, severe C programmers have trusted one e-book for functional, in-depth wisdom of the programming interfaces that force the UNIX and Linux kernels: W. Richard Stevens’ Advanced Programming within the UNIX® Environment . Now, once more, Rich’s colleague Steve Rago has completely up-to-date this vintage paintings. the recent 3rd version helps today’s top systems, displays new technical advances and top practices, and aligns with model four of the one UNIX Specification.

Steve rigorously keeps the spirit and procedure that experience made this booklet so priceless. construction on Rich’s pioneering paintings, he starts off with documents, directories, and procedures, rigorously laying the basis for extra complicated suggestions, akin to sign dealing with and terminal I/O. He additionally completely covers threads and multithreaded programming, and socket-based IPC.

This version covers greater than seventy new interfaces, together with POSIX asynchronous I/O, spin locks, limitations, and POSIX semaphores. so much out of date interfaces were got rid of, with the exception of a couple of which are ubiquitous. approximately all examples were verified on 4 smooth structures: Solaris 10, Mac OS X model 10.6.8 (Darwin 10.8.0), FreeBSD 8.0, and Ubuntu model 12.04 (based on Linux 3.2).

As in prior variants, you’ll examine via examples, together with greater than 10000 strains of downloadable, ISO C resource code. greater than 400 approach calls and services are validated with concise, whole courses that basically illustrate their utilization, arguments, and go back values. To tie jointly what you’ve realized, the ebook offers a number of chapter-length case stories, each one reflecting modern environments.

Advanced Programming within the UNIX® surroundings has helped generations of programmers write code with unheard of strength, functionality, and reliability. Now up to date for today’s structures, this 3rd version may be much more useful.

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Additional resources for Advanced Programming in the UNIX Environment (3rd Edition) (Addison-Wesley Professional Computing Series)

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As each vendor’s compilation systems evolve, they add more support for the latest version of the ISO C standard. html. Although the C standard was updated in 2011, we deal only with the 1999 version in this text, because the other standards haven’t yet caught up with the relevant changes. 1). 1 standard includes these headers, as well as others. 8, and Solaris 10) that are described later in this chapter. The ISO C headers depend on which version of the C compiler is used with the operating system.

Two filenames are automatically created whenever a new directory is created: . (called dot) and .. (called dot-dot). Dot refers to the current directory, and dot-dot refers to the parent directory. In the root directory, dot-dot is the same as dot. 4 Files and Directories 5 The Research UNIX System and some older UNIX System V file systems restricted a filename to 14 characters. BSD versions extended this limit to 255 characters. Today, almost all commercial UNIX file systems support at least 255-character filenames.

8 User Identification User ID The user ID from our entry in the password file is a numeric value that identifies us to the system. This user ID is assigned by the system administrator when our login name is assigned, and we cannot change it. The user ID is normally assigned to be unique for every user. We’ll see how the kernel uses the user ID to check whether we have the appropriate permissions to perform certain operations. We call the user whose user ID is 0 either root or the superuser. The entry in the password file normally has a login name of root, and we refer to the special privileges of this user as superuser privileges.

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