[Project Assignment]

Your project is to implement a shell-alike application, which acts like the Terminal / Konsole application in Ubuntu. Upon startup, it should show a command line asking the user to enter a command, for instance:

>_

[Milestone 1] - Due Week 11
For your first milestone, you need to implement the basic functionality in your shell application. It should only respond to the exit command and it should terminate upon entering that command. Additionally, you need to add history support (using a key of your choice) - e.g. if the user presses the Up or DOwnarrow key, it should show the previous or next command in the terminal just like the real terminal does and auto-complete them in the terminal. Example:

>_ (pressing Up)
>ls_ (pressing Up)
>cat test.txt_ (pressing Down)
>ls_ (pressing Down)
>_

[Milestone 2] - Due Week 12
For your second milestone, you need to implement support for executing external commands. Your application should be able to execute commands just like the real terminal does. Example:

>cat test.txt
This is the contents of test.txt
>_

[Lab 4] Homework - due on week 11

1. Write a program that creates N child processes, where N is taken from the command line, and makes each child process with index I compute the total number of divisors of the number I*10 and return them. The parent process will read each result returned by the children and show them on screen.

* Example:
N=5, child 0 will compute the number of divisors of 0, child 1 will compute the number of divisors of 10, child 2 the number of divisors of 20 and so on. Parent returns: "for child 0, I found 4 divisors", "for child 1, I found 6 divisors", etc.

* Desired input:
./app N

* Example:
./app 5

2. Write a program that creates N child processes, where N is taken from the command line, and also receives a filename. The program takes the input file and splits it so that each child process with the index I will show the exact Ith part of the file.

* Example:
Input file is 100 bytes in size and N=5. Child 0 will display bytes from 0 to 19, child 1 from 20 to 39, child 2 from 40 to 59 and so on.

* Desired input:
./app N input_file

* Example call:
./app 5 input.txt

[Lab 5] Homework - due on week 11

1. Write a program that creates a child process and waits for an input command (it reads it from the standard input). a) If the command is "show filename.txt" (no quotes), then the parent process will read the file filename.txt entirely and send it to the child process; the child process will send back to the parent the number of total words in that file, and the parent will show that number on screen. b) If the command is "trim filename.txt" (no quotes), the parent will no longer read the file, instead the child process will send to the parent the last 10 lines from the file filename.txt and the parent will show those lines on screen.

2. Write a program that creates N child processes, where N is taken from the command line, and also receives a filename and an input string. The program takes the input file and splits it so that each child process with the index I will process exactly the Ith part of the file, as follows: each child will determine if its allocated data chunk contains the input string or not, and all positions where matches occur. If matches are found, it will write to a pipe the locations of all occurrences.

Requirements:
a) Use a SINGLE PIPE for communication between the parent and all children.
b) BONUS points will be awarded if you can figure out a way to avoid misses if a string has a partial match in two different child processes (e.g. for "testing this", "testing " is partially matched by the first process and "this" by the second).
c) You can use strstr() to determine occurrences in a child process if you'd like, although that's not the optimal approach.

* Example call:
./app 5 input.txt "Something to search for"
Found occurrence at position 123
Found occurrence at position 567

MILESTONES 3 & 4

SCHUSZTER IOAN-CRISTIAN
PENTELIUC MARIUS
VLAD TEMIAN
LEONTE ALEXANDRU
NEBEJA CIPRIAN
BALOG BOGDAN
TRAISTARU GRATIAN
CIZMAS ARMIN
APOSTUL SERGIU
CONTORA SEBASTIAN
PAPADOPOULOS ALEX
CERASELA-KRISTINE VARGA
VLAD TIMOTEI
TRIPA MARIUS
GAVRILOIU ALEXANDRU
VIDONI ANA-MARIA
SECU DORIN-ALEXANDRU
VULPE ANCA
CHIUARU ALIN
DINIS DIANA ALINA
KROCOS LORENA
TIPIRIGAN ROBERT
BANYACSKAY WERNER
MIRON VALENTINA
GAVANESCU VLAD
AVRAM DANIEL
FULIA? SEBASTIAN ANDREI
IONESCU VICTOR CRISTIAN
IORGU VLAD
MARINESCU DAVID-WALTER
PATRU RARES CONSTANTIN
BUZA SEBASTIAN
STEFANIA-ALEXANDRA ACHIM
LORENA BEJAN
MALAI
DRAGHICI ROBERT STEFAN
URS ADRIAN BOGDAN
HANCA CRISTIAN
TURDA ALINA-MARIA
JOVREA STEFANIA
MARCULESCU MIHAELA ROXANA
MACRA ALEXANDRU
POPA MARIUS CRISTIAN
MOLDOVEANU BOGDAN ANDREI