A file system has a root directory containing two entries: homestar and strong, both directories. The homestar directory contains an entry for a regular file named txt. We can represent the current state of the system as follows: file # type contents------ ---- --------1 directory . -> 1 .. -> 1 homestar -> 2 strong -> 32 directory . -> 2 .. -> 1 txt -> 43 directory . -> 3 .. -> 14 regular file (contents of file) The symlink system call creates a directory entry that contains the path name of the file being linked to, rather than a file number. For example, after executing symlink(/homestar, /strong/mad), The contents of directory 3 would look like this: 3 directory . -> 3 .. -> 1 mad -> /homestar Show the changes to the state of the file system after each of the following operations is executed in succession. link(/homestar/runner.txt, /strong/bad.txt) symlink(/homestar/runner.txt, /strong/sad.txt) unlink(/homestar/runner.txt) mkdir(/trogdor) create(/trogdor/burninator.txt)

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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A file system has a root directory containing two entries: homestar and strong, both directories. The homestar directory contains an entry for a regular file named txt. We can represent the current state of the system as follows:

file #     type           contents
------     ----           --------
1         directory     . -> 1
.. -> 1
homestar -> 2
strong -> 3

2         directory     . -> 2
   .. -> 1
txt -> 4

3         directory     . -> 3
.. -> 1

4         regular file   (contents of file)

The symlink system call creates a directory entry that contains the path name of the file being linked to, rather than a file number. For example, after executing symlink(/homestar, /strong/mad), The contents of directory 3 would look like this:
3 directory . -> 3
.. -> 1
mad -> /homestar
Show the changes to the state of the file system after each of the following operations is executed in succession.
- link(/homestar/runner.txt, /strong/bad.txt)
- symlink(/homestar/runner.txt, /strong/sad.txt)
- unlink(/homestar/runner.txt)
- mkdir(/trogdor)
- create(/trogdor/burninator.txt)

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