By W. Richard Stevens, Stephen A. Rago
For greater than two decades, critical C programmers have trusted one ebook for useful, 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 structures, displays new technical advances and top practices, and aligns with model four of the one UNIX Specification.
Steve conscientiously keeps the spirit and strategy that experience made this booklet so precious. development on Rich’s pioneering paintings, he starts with records, directories, and approaches, rigorously laying the foundation for extra complex thoughts, equivalent to sign dealing with and terminal I/O. He additionally completely covers threads and multithreaded programming, and socket-based IPC.
This variation covers greater than seventy new interfaces, together with POSIX asynchronous I/O, spin locks, boundaries, and POSIX semaphores. such a lot out of date interfaces were got rid of, aside from a couple of which are ubiquitous. approximately all examples were demonstrated on 4 smooth systems: 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 variations, you’ll study via examples, together with greater than 10000 traces of downloadable, ISO C resource code. greater than 400 method calls and capabilities are tested with concise, whole courses that sincerely illustrate their utilization, arguments, and go back values. To tie jointly what you’ve discovered, the booklet offers a number of chapter-length case stories, each one reflecting modern environments.
Advanced Programming within the UNIX® setting has helped generations of programmers write code with remarkable energy, functionality, and reliability. Now up-to-date for today’s platforms, this 3rd version might be much more necessary.
Read or Download Advanced Programming in the UNIX Environment (3rd Edition) (Addison-Wesley Professional Computing Series) PDF
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Extra info for Advanced Programming in the UNIX Environment (3rd Edition) (Addison-Wesley Professional Computing Series)
EBUSY can be treated as nonfatal when it indicates that a shared resource is in use. 5). The typical recovery action for a resource-related nonfatal error is to delay and retry later. This technique can be applied in other circumstances. For example, if an error indicates that a network connection is no longer functioning, it might be possible for the application to delay a short time and then reestablish the connection. Some applications use an exponential backoff algorithm, waiting a longer period of time in each subsequent iteration.
Most of the examples in this text have been run on four different versions of Unix: 1. H. Corp. (UHC), on an Intel 80386 processor. 2. 3+BSD at the Computer Systems Research Group, Computer Science Division, University of California at Berkeley, on a Hewlett Packard workstation. 3. , on an Intel 80386 processor. 3+BSD. 4. 2 (systems with a strong Berkeley heritage but many System V features) from Sun Microsystems, on a SPARCstation SLC. Numerous timing tests are provided in the text and the systems used for the test are identified.
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. As we’ll see in Chapter 4, if a process has superuser privileges, most file permission checks are bypassed.