#ALX - Simple Shell Project

A project to code a simple shell for ALX. The project is to replicate the basic functionality of a Linux shell to test our knowledge of the C programming language. There were restrictions placed on which C standard library functions we were allowed to use. So, many functions were recreated for use inside the code.

###How to Install Compile the code like so:

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

This will cause all warnings to act as compilation errors and will name the executable file hsh.

##Usage Run like so:

./hsh

The shell can accept commands, which should be given like so:

$ command [args ...]

##Files & Contents

• arg_ops.c: Functions to tokenize user input and allocate proper amount of space in memory. Functions inside: wordcount(), make_args()
• builtins.c: Builtin functions made for our shell. Functions inside: hosh_setenv(), hosh_unsetenv(), hosh_exit(), hosh_printenv()
• builtins_help.c: Functions to print help for the builtin functions. Functions inside: help_exit(), help_unsetenv(), help_setenv(), help_env(), help_help()
• check_builtins.c: Check to see if input is a builtin function. Functions inside: check_builtins()
• check_path.c: Find the PATH, then append the command to the directories in PATH to find given command. Functions inside: check_path(), path_concat(), _copypath()
• env_ops.c: Different functions handling the environment variables. Functions inside: _unsetenv(), _findenv(), _addenv()
• execute.c: Execute given commands. Functions inside: output(), execute()
• loop.c: Run the main loop of the program. Functions inside: main(), loop()
• man_1_simple_shell: The man page for the shell project
• math_ops.c: Mathematical functions. Functions inside: _atoi()
• memory.c: Functions handling memory. Functions inside: smart_alloc(), free_array()
• print.c: Functions to print with. Functions inside: _puts(), _putchar()
• print_help.c: Print a list of all builtins. Functions inside: print_help()
• shell.h: Contains all function prototypes, structs, and header files necessary for all other functions
• string_ops.c: One of two files containing functions to manage string variables. Functions inside: _strlen(), _strdup(), _strspn(), _strchr(), _strpbrk()
• string_ops_2.C: Second of two files containing functions to manage string variables. Functions inside: _strncmp(), str_concat(), _strcpy()
• tokenize.c: Tokenize the given input. Functions inside: tokenize()

Authors

[Elvis Wangari].(https://ke.linkedin.com/in/elvis-wangari).

[Jackline Amwenya].(https://www.linkedin.com/in/jackline-amwenya-nehondo)