Download GNU/Linux Application Programming by M. Tim Jones PDF

By M. Tim Jones

The wide variety of functions to be had in GNU/Linux comprises not just natural functions, but additionally instruments and utilities for the GNU/Linux surroundings. GNU/Linux program Programming takes a holistic method of instructing builders the ins-and-outs of GNU/Linux programming utilizing APIs, instruments, conversation, and scripting. protecting various issues regarding GNU/Linux program programming, the publication is divided into six elements: The GNU/Linux working process, GNU instruments, program improvement, complicated issues (including conversation and synchronization and disbursed computing), Debugging GNU/Linux purposes, and Scripting. The e-book introduces programmers to the surroundings from the bottom layers (kernel, gadget drivers, modules) to the consumer layer (applications, libraries, tools), utilizing an evolutionary procedure that builds on wisdom to hide the extra complicated elements of the working procedure. via a readable, code-based sort builders will find out about the appropriate issues of dossier dealing with, pipes and sockets, approaches and POSIX threads, inter-process verbal exchange, and different improvement themes. After operating in the course of the textual content, they will have the information base and abilities to start constructing functions within the GNU/Linux setting.

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Line 5 illustrates the use of the filter function, which again makes use of the % wildcard character to match words ending in ing or able. Line 6 shows the output of the sort function that rearranges the input variables into lexical order. Line 7 illustrates the output of the words function that performs a word count operation on the input string. Line 8 illustrates the word function that allows the subsetting of a string by numerical index. In this case we have selected the second word, test. Notice that the indexes start at one rather than zero.

This example uses a pattern-matching rule in combination with the GNU make VPATH capability to simplify the Makefile. Still problematic is the header file dependencies that have been sequestered to the bottom of the new Makefile. The next section will introduce one mechanism for automating the processing of header dependencies. 2, but it accomplishes the same basic task as the original Makefile. First you should notice the introduction of variables into the Makefile to allow the control parameters (compile flags, file lists, and so on) to be enumerated and set at the top of the Makefile.

So /usr/local/lib $ exit In this example, we’ll move our shared library to a common location (/usr/local/lib). This is a standard directory for libraries, rather than relying on the image and shared library always being in the same location Chapter 6: Building and Using Libraries 49 50 Chapter 6: Building and Using Libraries (as was assumed in the previous example). Note that this library is identical to our original shared library. What is different is how our application deals with the library.

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