CSE 333 - OPERATING SYSTEMS Programming Assignment # 1 Solved

CSE 333 - OPERATING SYSTEMS
Programming Assignment  # 1    

1. (15 pts) A histogram is a representation of the distribution of numerical data. Write a shell script that will create histogram of a file of numbers. Your program will take a filename as an argument. The file will contain a number in between 0-9, inclusive, at each line. You will count the occurrence of each number and print histogram. For example:

Ex:

$ cat file.txt

4

5

5

2

1

2

2

7

6

1

6

6

8

Ex:

$ ./myprog1.sh file.txt

0

1  **

2  ***

3

4  *

5  **

6  ***

7  *

8  *

9

2.     (15 pts) Write a shell script that takes two command line arguments, first one being a string and the second one being a number. The number has to have a length of either 1 or same as the string. Your program should then convert the input string into a ciphered one using this number. For each letter in the string, your program has to find another letter in the English alphabet advancing over the alphabet corresponding digit times. For example:

Ex:

$ ./myprog2.sh apple 12345 brspj

Since b is one after a, r is two after p and so on. If the number has only one digit, then this digit will be used for all the letters in the string.

Ex:

$ ./myprog2.sh zoo 8 hww

3.     (15 pts) Write a shell script that will take an optional pathname as an argument. If your program is run with no argument, then it will find the oldest file under current working directory and delete it, after asking the user. If your program is run with a pathname as an argument,  it will find the oldest file under given pathname and delete it, after asking the user.

Ex:

$ ls -l

-r---w---- 1 std std 13107  cask-of-amontillado.txt

-rw------- 1 std std 0 french.txt drwx------ 14 std std 456  shakespeare -rw------- 1 std std 0  trees-and-other-poems.txt

$ ls -l shakespeare

-rw------- 1 std std 456  barleby-scrivener.txt

-rw------- 1 std std 0 calaveras-county.txt

$ ./myprogr3.sh

Do you want to delete cask-of-amontillado.txt? (y/n): y

1 file deleted

$ ./myprogr3.sh shakespeare

Do you want to delete barleby-scrivener.txt.txt? (y/n): y

1 file deleted

4. (20 pts) Write a shell script that takes a filename as an argument. Your program will change the numbers to text for each number in between 0-9, inclusive.

Ex:

$ cat file.txt

 Lorem ipsum dolor sit amet, consectetur adipiscing elit. 7 Suspendisse vitae odio blandit, commodo nisl dignissim, 9 commodo est. Quisque blandit laoreet ante id tincidunt. Vivamus in vestibulum sem. Duis ac faucibus quam. Mauris posuere, sapien quis elementum porttitor, leo turpis finibus erat, vel dapibus 00 lorem mauris in elit. Curabitur quis massa sit amet ligula suscipit pulvinar. 

Ex:

$ ./myprog4.sh

$ cat file.txt

 Lorem ipsum dolor sit amet, consectetur adipiscing elit. seven Suspendisse vitae odio blandit, commodo nisl dignissim, nine commodo est. Quisque blandit laoreet ante id tincidunt. Vivamus in vestibulum sem. Duis ac faucibus quam. Mauris posuere, sapien quis elementum porttitor, leo turpis finibus erat, vel dapibus zerozero lorem mauris in elit. Curabitur quis massa sit amet ligula suscipit pulvinar. 

Note that the numbers are highlighted in bold only for readability concerns. 

5. (25 pts) Write a shell script that takes a wildcard argument and a -R option. If your program is run with no option, then it will find all the files whose name obeys the wildcard and copy them into a directory named copied.  If your program is run with -R option, your program will work recursively. For example:

Ex: $ ls

cask-of-amontillado.txt french.txt shakespeare trees-and-otherpoems.txt

$ ls shakespeare

barleby-scrivener.txt calaveras-county.txt

$ ./myprog5.sh -R “c*.txt”

$ ls

copied cask-of-amontillado.txt french.txt shakespeare trees-and-otherpoems.txt

$ ls copied cask-of-amontillado.txt

$ ls shakespeare

copied calaveras-county.txt barleby-scrivener.txt

$ ls shakespeare/copied calaveras-county.txt

•       Bonus:You will get 10% extra credit if your program supports a Menu including all questions above. Example:

$ ./myprog.sh  Please select an option:

1.     Create histogram

2.     Encryption

3.     Delete oldest

4.     Convert numbers

5.     Organized files

6.     Exit

These options must be printed inside a loop until “Exit” option is selected. When user enters one choice, you should ask for the arguments if that option requires any. From the menu file, you will call the chosen option with arguments.

Notes:

•       You are required to consider all necessary error checking for the programs. 

•       No late homework will be accepted. 

•       In case of any form of copying and cheating on solutions, all parties will get ZERO grade. You should submit your own work. In case of any forms of cheating or copying, both giver and receiver are equally culpable and suffer equal penalties.

•       You have to work with two partners. Your partners will not be changed throughout the semester. 

•       (10 pts) You are required to submit a minimum 2-pages report and commented code (via e-mail: cse333.projects@gmail.com). 

•       Your report should include explanations about implementations with screenshots of your sample executions. Your implementation detail should be provided in the source code comment. 

•       Please put your COMMENTED source codes and project report in a zip file and make sure that your zip file name contains your student IDs! 

Ex: 150713852_150713853_15071385_Project1.zip

•       If after 3 projects, your overall grade is higher than 100, it will be considered as 100.