simple_shell

Writing a simple UNIX command interpreter.

simple_shell project repository

Pre-requisites

Authorized functions and macros:

• access (man 2 access)
• chdir (man 2 chdir)
• close (man 2 close)
• closedir (man 3 closedir)
• execve (man 2 execve)
• exit (man 3 exit)
• _exit (man 2 _exit)
• fflush (man 3 fflush)
• fork (man 2 fork)
• free (man 3 free)
• getcwd (man 3 getcwd)
• getline (man 3 getline)
• isatty (man 3 isatty)
• kill (man 2 kill)
• malloc (man 3 malloc)
• open (man 2 open)
• opendir (man 3 opendir)
• perror (man 3 perror)
• read (man 2 read)
• readdir (man 3 readdir)
• signal (man 2 signal)
• stat (__xstat) (man 2 stat)
• lstat (__lxstat) (man 2 lstat)
• fstat (__fxstat) (man 2 fstat)
• strtok (man 3 strtok)
• wait (man 2 wait)
• waitpid (man 2 waitpid)
• wait3 (man 2 wait3)
• wait4 (man 2 wait4)
• write (man 2 write)

GCC command to compile:

gcc -Wall -Werror -Wextra -pedantic *.c -o hsh `

Memory leak check

valgrind --leak-check=full --show-leak-kinds=all --track-origins=yes ./hsh

This wil compile all the '.c' files and change the output's name to 'hsh'.

Template to test output:

=========================== $ ./hsh

($)

hsh main.c shell.c

$ exit $

Project Requirements

=========================

• [0] README, man, AUTHORS File: README.md, man_1_simple_shell, AUTHORS
• [1] passes the Betty checks
• [2] display prompt, REPL, Cntl + D, Perrors: "./shell: No such file or directory"
  work with "/bin/ls",
• [3] cmd + args; ls -l , echo "..." , cd /home,
• [4] Handle the PATH ls -l /tmp
• [5] exit, only exit no args
• [6] env : print current env
• [7] Test suite: reg cases, 0-20,edge cases,
• [8] _getline make your own
• [9] ..do not use strtok
• [10] exit 98, echo $?
• [11] Ctrl + C, should not quit
• [12] setenv, unsetenv, implement,
• [13] cd [] cd $HOME, update env var PWD, cd -,
• [14] Handle the commands separator ;,, ls /var ; ls /var ,
• [15] Handle the && and || shell logical operators, ls /var && ls /var, ls /var && ls /var && ls /var && ls /hbtn && ls /hbtn
• [16] alias [name[='value'] ...] , implement alias,
• [17] Handle variables replacement echo $PATH Handle the $? variable echo $? Handle the $$ variable echo $$
• [18] Handle comments (#) echo $$ # ls -la
• [19] Usage: help [BUILTIN] implement help builtin
• [20] Implement the history built-in, without any argument
• [21] File as input : simple_shell [filename]

README.md: this.

Contact Info:

Git: Biniyam Melaku,