By Alan Holt, Chi-Yu Huang
ISBN-10: 1447166027
ISBN-13: 9781447166023
ISBN-10: 1447166035
ISBN-13: 9781447166030
This practically-oriented textbook offers a transparent creation to the various part elements of an working procedure and the way those interact. The easy-to-follow textual content covers the bootloader, kernel, filesystem, shared libraries, start-up scripts, configuration documents and procedure utilities. The approach for construction each one part is defined intimately, guiding the reader throughout the means of making a absolutely useful GNU/Linux embedded OS. good points: offers a concise evaluation of the GNU/Linux procedure, and an in depth evaluate of GNU/Linux filesystems; describes the best way to construct an embedded procedure to run on a digital desktop, and to run natively on an exact processor; introduces the idea that of the compiler toolchain, demonstrating the way to increase a pass toolchain in order that courses might be outfitted on various diverse architectures; discusses the ARM-based structures BeagleBone and Raspberry Pi; explains the best way to construct OpenWRT firmware photographs for OMxP Open-mesh units and the Dragino MS14 series.
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Download PDF by Alan Holt, Chi-Yu Huang: Embedded Operating Systems: A Practical Approach
This practically-oriented textbook offers a transparent advent to the several part elements of an working procedure and the way those interact. The easy-to-follow textual content covers the bootloader, kernel, filesystem, shared libraries, start-up scripts, configuration records and method utilities. The approach for construction every one part is defined intimately, guiding the reader throughout the technique of making a absolutely useful GNU/Linux embedded OS.
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Additional resources for Embedded Operating Systems: A Practical Approach
Sample text
Here, we explore shell variable exportation further. 7 The Process Environment The new shell has inherited the variable greeting. 8 Summary In this chapter we discussed the component parts a GNU/Linux system, namely the bootloader, kernel and filesystem. In later chapters we will describe in details to how build these components. Once the system has booted (init process has been initialised), system daemons and user applications are run as processes, where processes are programs under execution.
1 shows a graphical representation of a processes (initial) I/O streams. 3 shows a summary of the I/O streams. It shows that each I/O stream is associated with a file descriptor. When any file object is opened by a process, a file descriptor is created which is an index to the file object. Initially, file descriptors 0,1 and 2 mapped to devices, that is, keyboard and screen. However, these file descriptors can be mapped to other file objects. These file objects can be other devices or actual Fig.
FAT/NTFS Microsft filesystems. The command-line below shows the directory structure for actual GNU/Linux system. 4 The Root Filesystem | |-|-|-|-| | | |-|-| | | | | ‘-- 19 ‘-- modules proc root sbin share |-- info |-- locale ‘-- man sys usr |-- bin |-- lib |-- libexec |-- sbin ‘-- share var 39 directories The GNU/Linux directory structure is defined in the filsystem hierarchy standard (FHS) and is governed by the Free Standards Group [2]. It is made up of a number of vendors, such as HP, Red Hat and IBM.
Embedded Operating Systems: A Practical Approach by Alan Holt, Chi-Yu Huang
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