Simple Shell(hsh)

Simple shell project is a Holberton School project replicating a basic command line interpreter(
shell) that executes commands by evaluating user input.

File Descriptions

shell.h - header file including macros , prototypes, & struct main.c - takes user command and executes if file exists tokens.c - splits a character string into 2d array of tokens add_node_end.c - adds a new node at the end of a listint_t list. check_path.c - concat user input to values of linked list execute.c - executes the command get_path.c - tokenize PATH and store values in a linked list isbuiltin.c - searches for builtin and finds it's corresponding handling fcn to_free.c - frees lists

• free_linked(list_t *head, char *buffer) - frees a linked list and buffer
• free_2darray(char **array) - frees a 2D array
  run_path.c - store PATH in linked list and check if usr command exist

Helper Functions: helpers.c - helper functions:

• run_prompt(void) - prints prompt to stdout
• _memset(char *buffer) - fills memory with null bytes
• file_stat(char *str) - check whether file exists
• cmd_error(char *filename)
• signal_handle - signal handler

strings.c - helper string functions:

• _putstring(char *str)
• _strlen(char *s)
• _strcmp(char *s1, char *s2)
• *_strcat(char *dest, char *src)
• _strcpy(char *dest, char *src)
  strings2. - more helper string functions
• _strncmp(char *s1, char *s2, int n)
• _putchar(char c)

Usage

Simple shell currently support builtins env and exit as well as functions available in the environment variable, PATH. All programs were compile with gcc 4.8.4 in Ubuntu 14.05.5 LTS.

Clone simple_shell repository: git clone https://github.com/jhuang10123/simple_shell.git

Compile program:
gcc -Wall -Wextra -Werror -pedantic *.c -o hsh

Holberton shell can then be invoked by running the executable hsh

To run in interactive mode, enter ./hsh and a command once gree
ted by prompt.

To run in noninteractive mode, pipe command into this hsh: echo \ "ls -l" | ./hsh

To run a simple ls -l command in interactive mode: ($) ls -l

Authors

Jennifer Huang - Github
Alexa Inga - Github