By W. Richard Stevens, Stephen A. Rago
PLEASE be aware: in all likelihood as a result of huge dimension or excessive pagecount e-ink readers seem to have hassle rendering the pages of this publication. it's going to open adequately on computer-based readers or phones/tablets (Android, iPad, etc). this can be most probably only a reminiscence factor because of generally weaker on ereaders - the dossier supplied this is no longer malformed or corrupt.
For greater than 20 years, severe C programmers have trusted one booklet for sensible, in-depth wisdom of the programming interfaces that force the UNIX and Linux kernels: W. Richard Stevens’ complex Programming within the UNIX® surroundings . Now, once more, Rich’s colleague Steve Rago has completely up to date this vintage paintings. the hot 3rd variation helps today’s major structures, 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 ebook so worthy. construction on Rich’s pioneering paintings, he starts with documents, directories, and techniques, conscientiously laying the basis for extra complicated options, reminiscent of 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, boundaries, and POSIX semaphores. so much out of date interfaces were got rid of, with the exception of a number of which are ubiquitous. approximately all examples were confirmed on 4 glossy 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 procedure calls and capabilities are verified with concise, entire courses that truly illustrate their utilization, arguments, and go back values. To tie jointly what you’ve realized, the booklet 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 can be much more beneficial.
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Extra info for Advanced Programming in the UNIX Environment (3rd Edition)
15 mpo_destroy_cred_label void mpo_destroy_cred_label(struct label *label); Parameter Description label Locking Label being destroyed Destroy the label on a credential. In this entry point, a policy module should free any internal storage associated with label so that it may be destroyed. 16 mpo_destroy_devfsdirent_label void mpo_destroy_devfsdirent_label(struct label *label); Parameter Description label Locking Label being destroyed Destroy the label on a devfs entry. In this entry point, a policy module should free any internal storage associated with label so that it may be destroyed.
Msgctl(3): Using this function, a process can query the status of a message descriptor. • msgsnd(3): msgsnd sends a message to a process. = NULL) return (ENOSYS); Semaphore system calls allow processes to synchronize execution by doing a set of operations atomically on a set of semaphores. Basically semaphores provide another way for processes lock resources. However, process waiting on a semaphore, that is being used, will sleep until the resources are relinquished. The following semaphore system calls are blocked inside a jail: semsys, semget, semctl and semop.
5 MAC Framework Kernel Architecture The TrustedBSD MAC Framework permits kernel modules to extend the operating system security policy, as well as providing infrastructure functionality required by many access control modules. If multiple policies are simultaneously loaded, the MAC Framework will usefully (for some definition of useful) compose the results of the policies. 1 Kernel Elements The MAC Framework contains a number of kernel elements: • Framework management interfaces • Concurrency and synchronization primitives.