COMPUTER SCIENCE ILLUMIN.-TEXT
COMPUTER SCIENCE ILLUMIN.-TEXT
6th Edition
ISBN: 2810016866372
Author: Dale
Publisher: JONES+BART
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Chapter 11, Problem 50E

a.

Program Plan Intro

Path:

To represent the path of the file, first identify the type of the environment in the operating system.

  • The path is a string or a sequence of characters separated by a forward or backward slash that contains the specified location of file.
  • The path can be represented in two ways,
    • Absolute path:
      • It specifies the path of the file step by step, from the root of the directory.
      • The path of the file starts from the root directory.
      • Absolute path names can be represented with a forward slash (/) or backward slash (\) based upon the type of operating system.
    • Relative path:
      • It specifies the name from the current working directory.
      • Relative path names can be represented with two dots (..) preceded by the forward (/) or backward slash (\)based upon the type of operating system.

The following diagram represents the directory tree structure on UNIX environment.

COMPUTER SCIENCE ILLUMIN.-TEXT, Chapter 11, Problem 50E

  • Relative path of the file in a UNIX environment is represented by separating the directories, subdirectories and files by a forward slash (/).

Explanation of Solution

b.

Relative path for localtime (working directory is “etc”) directory:

  • In the above diagram,
    • The current working directory is the root directory “etc”.
  • From the above directory structure, it is clearly known that:

Explanation of Solution

c.

Relative path for printall (working directory is “utilities”) directory:

  • In the above diagram,
    • The current working directory is the directory “utilities”.
  • From the above directory structure, it is clearly known that:
      ...

Explanation of Solution

d.

Relative path for week1.txt (working directory is “man2”) file:

  • In the above diagram,
    • The current working directory is the directory “man2”.
  • From the above directory structure, it is clearly known that:
    • It is a relative path; it specifies the name of the file from the current working directory.
      • Under the directory “reports”, the text file “week1.txt” is located.
      • The current working directory “man2” and the subdirectory “reports” are nested subdirectories...

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