Create new user account - system administrator, Computer Engineering

A common task for a system administrator is to create new user accounts. In this lab you will be creating output that looks like an /etc/passwd file.

The Problem

You are to write a Perl script that will read in values from an INPUT file to be passed as an argument to the script.  The file contains the following information:

  • The user's full name (e.g.,  Mike H Smith)
    • A period after Middle name is optional
    • Full Middle name is also optional
    • Assume there is always one space between First, Middle, and Last name
    • You do NOT have to perform error checking on this field
  • The user's ID number (ssno)
    • Should be of the form: 3 digits, dash, 2 digits, dash, 4 digits

Ex: "111-22-3333"

  •  
    • You DO have to perform error check on this field using string functions mentioned in class. If the full social security number (the part between "/") is not of the right format you MUST print out the following message to STDERR: The String "Bad Soc" followed by a colon, then a space and the offending invalid Soc number. For Example:

Bad Soc: 123-456-7888

  •  
    • Your error message must look EXACTLY like this, do not vary even slightly!
    • You ONLY have to make sure that the dashes are in the correct places and the number of characters is correct NOT that the other characters are actually digits
    • (DO NOT USE split() and REGULAR EXPRESSIONS for this)
  • The user's group (will be "student", "staff" ONLY)
    • You do NOT need to perform error checking on this field

Based on this information, you will print to STDOUT a user line analogous to the one that would appear in /etc/passwd.

The INPUT file will be formatted as follows:

First Middle Last/SSN/Group

With the "/" character being used as the delimiter.

For example:

John X. Doe/555-12-1234/staff

Mike Xavier Smith/123-45-1111/student

Susan Q Jones/109-54-8832/student

Emily Sophie Zielewsky/987-65-4322/staff

Once you have the necessary input from the file, you need to create the following fields to display to STDOUT:

username:passwd:uid:gid:full name:home dir path:shell

username:

o   Create a old DCE style username for students: first initial, middle initial, last initial followed by last 4 of SSN (abc1234).

o   Use just the 3 initials of the name for the username for staff (yxn)

o   Note that there are NO uppercase letters in usernames

passwd:

In the modern age of password shadowing you would never really do this, but for the purpose of this lab you should allow the user to enter input for this value.

Posted Date: 3/20/2013 1:04:28 AM | Location : United States







Related Discussions:- Create new user account - system administrator, Assignment Help, Ask Question on Create new user account - system administrator, Get Answer, Expert's Help, Create new user account - system administrator Discussions

Write discussion on Create new user account - system administrator
Your posts are moderated
Related Questions
It's not trivial to execute nested functions such that they have the proper access to local variables in the having function(s), so they were deliberately left out of C as a simpli

why to learn data base?

Write a class encapsulating the concept of a circle? I have been working on this program for awhile and this is all I have so far... What are my flaws in the program besides not ha

A/An                network is typically a company network that connects multiple company locations into a single network. (A)  local area                                  (B

Explain Bottom-up Parsing Techniques A parser can begin with the input and attempt to rewrite it to the start symbol. Instinctively, the parser attempts to locate the most bas

What are the difference between finite automata and Turing Machines?  Turing machine can alter symbols on its tape, while the FA cannot change symbols on tape.  Also  TM  has  a

Explain the Storage Class Static The Storage Class Static : Static declarations have two important and distinct uses. The more elementary use is to allow a local variable to

Rounding off of values can be carried out using the write statement. Yes, Rounding off value can be out by using the write statement.

The goal of computer architects is to design computers that are cheaper and more powerful than their predecessors. A cheaper computer has: Low hardware manufacturing cost.

define request edge and assignment edge