UNIX操作系統

所属分类:操作系統  
出版时间:2011-4   出版时间:劉玉坤 高等教育出版社 (2011-04出版)   作者:劉玉坤,等 編   页数:368  

内容概要

  《UNIX操作系統︰依據UNIX內核服務的開發指南(英文版)》是一個源代碼操作系統,廣泛應用于企業級行業應用領域以及嵌入式設備中。《UNIX操作系統︰依據UNIX內核服務的開發指南(英文版)》全面地、系統地介紹了UINX操作系統的開發和管理原則、內核服務、shell、計算機聯網和應用。內容包括五個部分︰背景以及如何開始、文本編輯器、UNIX的內核服務、UNIX的命令解釋以及編程和UINX的網絡連接。  《UNIX操作系統︰依據UNIX內核服務的開發指南(英文版)》可作為高等院校計算機專業研究生和高年級本科生的教學參考書,也可供程序設計員參考。

作者简介

郭立煒,1988年碩士研究生畢業于哈爾濱電工學院,現任河北科技大學信息學院院長、教授。長期在高校從事教學及管理工作,主講過10門大學課程,參與完成了與波蘭華沙電工研究所的大型發電設備電磁場計算及其頻率特性分析的合作課題,在國內外發表有影響的學術論文30多篇。Yukun Liu(劉玉坤)河北科技大學計算機系副教授,英國貝德福特大學應用計算研究所博士研究生。Yong Yue(岳勇)英國貝德福特大學教授,應用計算研究所主任,計算機科學與技術系執行主任。

书籍目录

1  Background of UNIX Operating System  1.1  Introduction of Operating System  1.2  Types of UNIX  1.3  History of UNIX  1.4  Summary  Problems  References2  How to Start  2.1  UNIX Software Architecture    2.1.1  UNIX Kernel    2.1.2  System Call Interface    2.1.3  Standard Libraries and Language Libraries    2.1.4  UNIX Shell    2.1.5  Applications  2.2  UNIX Environment  2.3  Character User Interface Versus Graphical User Interface  2.4  UNIX Command Lines    2.4.1  UNIX Command Syntax    2.4.2  Directory Operation Commands    2.4.3  File Operation Commands    2.4.4  Displaying Online Help    2.4.5  General Utility Commands    2.4.6  Summary for Useful Common Commands  2.5  UNIX Window Systems    2.5.1  Starting X    2.5.2  Working with a Mouse and Windows    2.5.3  Terminal Window    2.5.4  Using a Mouse in Terminal Windows  2.6  Shell Setup Files  2.7  Summary  Problems  References3  Text Editors  3.1  Difference Between Text Editors and Word Processors  3.2  Introduction of Pico Editor    3.2.1  Start pico, Save File, Exit pico    3.2.2  Create a New File with Pico    3.2.3  Cursor-moving Commands in Pico    3.2.4  General Keystroke Commands in Pico  3.3  The vi Editor and Modes    3.3.1  Three Modes of the vi and Switch Between Them    3.3.2  Start vi, Create a File, Exit vi    3.3.3  Syntax of the vi Commands  3.4  Practicing in Insert Mode of the vi Editor  3.5  Practicing in Command Mode and Last Line Mode of the vi Editor  3.6  Using Buffers of the vi Editor  3.7  The vi Environment Setting  3.8  Introduction of the emacs Editor    3.8.1  Start emacs, Create File, Exit emacs    3.8.2  Buffers, Mark and Region in emacs    3.8.3  Cursor Movement Commands    3.8.4  Keyboard Macros    3.8.5  Search and Replace    3.8.6  Operation Example    3.8.7  Programming in emacs  3.9  Summary  Problems  References4  UNIX Process Management  4.1  Multiple Processes'Running Concurrently    4.1.1  Fundamental Concept for Scheduler and Scheduling Algorithm    4.1.2  UNIX Scheduling Algorithm and Context Switch  4.2  Process States  ……5 Unix Memory Management6 Unix File System7 Unix i/o System, i/o Redirection and Piping8 Unix Shell Introduction9 How to Program in Bourne Shell (1)10 How to Program in Bourne Shell (2)11 Unix in Internet and Computer Networkingindex

章节摘录

版權頁︰插圖︰When the demand paging handler is invoked during the fork system call,the kernel increments the region reference field of shared regions for the childprocess. For each of private regions of the child process, the kernel allocates anew region table entry and page table. The kernel then examines each entryin page table of the parent process. If a page is valid, the kernel incrementsthe reference process number in its frame table entry, indicating the numberof processes that share the page via different regions rather than through theshared region in order to let the parent and child processes go in differentways after the execve system call. Similarly, if the page exists on the swapspace, it increments the reference field of the swap table entry for this page.Now the page can be referenced through both regions, which share the pageuntil one of the parent or child processes writes to it.Then the kernel copies the page so that each region has a private version.To do this, the kernel turns on the copy-on-write bit for each page table entryin private regions of the parent and child processes during the fork systemcall. If either process writes the page, it causes a protection page fault thatinvokes the protection handler. Now we can see that the copy-on-write bitin a page table entry is designed to separate a child process creation fromits physical memory allocation. In this way, via protection page fault, thememory allocation can postpone until it is needed.The protection page fault can be caused in two situations. One is whena process references a valid page but its permission bits do not allow theprocess access, and the other is when a process tries to write a page whosecopy-on-write bit is set by the fork system call. The kernel has to check firstwhether or not permission is denied in order to make a decision about whatto do next, to signal an error message or to invoke the protection handler. Ifthe latter, the protection handler is invoked.When the protection handler is invoked, the kernel searches for the ap-propriate region and page table entry, and locks the region so that the pagecannot be swapped out while the protection handler operates on it. If thepage is shared with other processes, the kernel allocates a new frame andcopies the contents of the old page to it; the other processes still referencethe old page. After copying the page and updating the page table entry withthe new frame number, the kernel decrements the process reference numberof the old frame table entry.

编辑推荐

UNIX操作系統是一個源代碼操作系統,廣泛應用于企業級行業應用領域以及嵌入式設備中。《UNIX操作系統(依據UNIX內核服務的開發指南英文版)》全面地、系統地介紹了UNIX操作系統的開發和管理原則、內核服務、Shell、計算機聯網和應用。內容包括五個部分︰背景以及如何開始、文本編輯器、UNIX的內核服務、UNIX的命令解釋以及編程和UNIX的網絡連接。本書由劉玉坤、岳勇、郭立煒編著。

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