Read e-book online Advanced Linux Programming PDF

By CodeSourcery LLC, Mark L. Mitchell, Alex Samuel, Jeffrey Oldham

ISBN-10: 0735710430

ISBN-13: 9780735710436

Do not pass judgement on this booklet by means of its name. in case you know the way to application, yet are a servant of the Microsoft Lord (we do not converse his name), this e-book is the pathway to benefit Linux programming. it's very good written. If one has the self-discipline to paintings in the course of the various examples, they're going to become skilled at Linux programming, e.g., fork new procedures, enforce pthreads, comprehend universal process calls, and maybe better of all enjoy the event of the those Linux programmers. it's a positive ebook on the intermediate level.

Try it out. This booklet is out there at no cost at http://www.advancedlinuxprogramming.com. Having an digital replica comes in handy for looking, and it may be published. A thanks is to ensure that a top quality booklet made on hand to the general public, for free. thanks authors! i glance ahead to different books those fellows write. do not be stunned if you end up valuing the ebook adequate to buy a duplicate from Amazon, yet that could be a own decision.

As a serious SOB (so says my wife), I do have a few unfavourable reviews. The publication has a few errata, so ensure that you do obtain corrections from the website. additionally, the e-book is 5 years outdated, and a moment variation will be impressive. All thought of, this e-book has to be rated five stars, interval.

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Example text

4 Errors and Resource Allocation Often, when a system call fails, it’s appropriate to cancel the current operation but not to terminate the program because it may be possible to recover from the error. One way to do this is to return from the current function, passing a return code to the caller indicating the error. If you decide to return from the middle of a function, it’s important to make sure that any resources successfully allocated previously in the function are first deallocated. These resources can include memory, file descriptors, file pointers, temporary files, synchronization objects, and so on.

GNU/Linux also provides perror, which prints the error description directly to the stderr stream. Pass to perror a character string prefix to print before the error description, which should usually include the name of the function that failed. h> if you use perror. This code fragment attempts to open a file; if the open fails, it prints an error message and exits the program. Note that the open call returns an open file descriptor if the open operation succeeds, or –1 if the operation fails. txt”, O_RDONLY); if (fd == -1) { /* The open failed.

Assert (rval == -1); /* Check the value of errno, and take appropriate action. */ switch (error_code) { case EPERM: /* Permission denied. */ case EROFS: /* PATH is on a read-only file system. */ case ENAMETOOLONG: /* PATH is too long. */ case ENOENT: /* PATH does not exit. */ case ENOTDIR: /* A component of PATH is not a directory. */ case EACCES: /* A component of PATH is not accessible. */ /* Something’s wrong with the file. Print an error message. */ fprintf (stderr, “error changing ownership of %s: %s\n”, path, strerror (error_code)); /* Don’t end the program; perhaps give the user a chance to choose another file...

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Advanced Linux Programming by CodeSourcery LLC, Mark L. Mitchell, Alex Samuel, Jeffrey Oldham


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