New PDF release: Advanced Linux Programming

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

Do not pass judgement on this e-book via its name. if you happen to know the way to application, yet are a servant of the Microsoft Lord (we do not communicate his name), this e-book is the pathway to profit Linux programming. it's very good written. If one has the self-discipline to paintings during the quite a few examples, they're going to become skilled at Linux programming, e.g., fork new methods, enforce pthreads, comprehend universal approach calls, and maybe better of all enjoy the adventure of the those Linux programmers. it's a effective e-book on the intermediate level.

Try it out. This ebook is accessible at no cost at Having an digital replica comes in handy for looking out, and it may be revealed. A thanks is to ensure that a top quality publication made to be had 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 sufficient to buy a replica from Amazon, yet that could be a own decision.

As a serious SOB (so says my wife), I do have a few unfavorable reviews. The e-book 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 additionally, the e-book is 5 years outdated, and a moment version will be fabulous. All thought of, this ebook needs to be rated five stars, interval.

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To specify the available long options, you construct an array of struct option elements. Each element corresponds to one long option and has four fields. You could construct the array like this: const struct option long_options[] = { { “help”, 0, NULL, ‘h’ }, { “output”, 1, NULL, ‘o’ }, { “verbose”, 0, NULL, ‘v’ }, { NULL, 0, NULL, 0 } }; You invoke the getopt_long function, passing it the argc and argv arguments to main, the character string describing short options, and the array of struct option elements describing the long options.

With most shells, it’s possible to obtain the exit code of the most recently executed program using the special $? variable. Here’s an example in which the ls command is invoked twice and its exit code is printed after each invocation. In the first case, ls executes correctly and returns the exit code zero. In the second case, ls encounters an error (because the filename specified on the command line does not exist) and thus returns a nonzero exit code. % ls / bin coda etc lib misc nfs proc boot dev home lost+found mnt opt root % echo $?

You turn off the check by defining the macro NDEBUG. cpp, but that would require changing the source itself. You can do this by using the -O2 command-line option. 4, “Debugging with GDB”). Also, in certain instances, compiling with optimization can uncover bugs in your program that did not manifest themselves previously. You should always use g++ to link a program that contains C++ code, even if it also contains C code. If your program contains only C code, you should use gcc instead. o The -o option gives the name of the file to generate as output from the link step.

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