orlando-gama / simple_shell

Project name : Simple_Shell

This project has been done by Orlando Gama and Ashan Kantengule. all credit to go to ORLANDO GAMA for creating this repository.

Taskes to be done for this project;

0. Betty would be proud Write a beautiful code that passes the Betty checks
1. Simple shell 0.1 Write a UNIX command line interpreter.

Usage: simple_shell 2. Simple shell 0.2 Simple shell 0.1 +

Handle command lines with arguments 3. Simple shell 0.3 Simple shell 0.2 +

Handle the PATH fork must not be called if the command doesn’t exist 4. Simple shell 0.4 Simple shell 0.3 +

Implement the exit built-in, that exits the shell Usage: exit 5. Simple shell 1.0 Simple shell 0.4 +

Implement the env built-in, that prints the current environment 6. Simple shell 0.1.1 Simple shell 0.1 +

Write your own getline function Use a buffer to read many chars at once and call the least possible the read system call 7. Simple shell 0.2.1 Simple shell 0.2 +

You are not allowed to use strtok 8. Simple shell 0.4.1 Simple shell 0.4 +

handle arguments for the built-in exit Usage: exit status, where status is an integer used to exit the shell 9. setenv, unsetenv Simple shell 1.0 +

Implement the setenv and unsetenv builtin commands

setenv Initialize a new environment variable, or modify an existing one Command syntax: setenv VARIABLE VALUE Should print something on stderr on failure 10. cd Simple shell 1.0 +

Implement the builtin command cd:

Changes the current directory of the process. Command syntax: cd [DIRECTORY] If no argument is given to cd the command must be interpreted like cd $HOME You have to handle the command cd - You have to update the environment variable PWD when you change directory man chdir, man getcwd 11. ; Simple shell 1.0 +

Handle the commands separator ; 12. && and || Simple shell 1.0 +

Handle the && and || shell logical operators 13. alias Simple shell 1.0 +

Implement the alias builtin command Usage: alias [name[='value'] ...] alias: Prints a list of all aliases, one per line, in the form name='value' alias name [name2 ...]: Prints the aliases name, name2, etc 1 per line, in the form name='value' alias name='value' [...]: Defines an alias for each name whose value is given. If name is already an alias, replaces its value with value 14. Variables Simple shell 1.0 +

Handle variables replacement Handle the $$ variable Handle the $? variable 15. Comments Simple shell 1.0 +

Handle comments (#) 16. File as input Simple shell 1.0 +

Usage: simple_shell [filename] The file contains all the commands that your shell should run before exiting The file should contain one command per line In this mode, the shell should not print a prompt and should not read from stdin Your shell can take a file as a command line argumentd