Simple Shell is a program that reads the user input from file or terminal, make a proccess to interprets the instruction, and executes them. This is a simple shell that has the more basic functionality for linux commands.
This Simple Shell is designed to run in the Ubuntu 20.04.3 LTS linux
environment and cmpiled with GNU compiler using flags -Wall -Werror -Wextra -pedantic -std=gnu89.
- Compile: `gcc -Wall -Werror -Wextra -pedantic -std=gnu89 *.c -o
- shell
Run the shell in interactive mode:./shell` - Run the shell in non-interactive mode: Example
echo "ls" | ./shell
This simple shell program is an application that reads the input from user from a file or the terminal, proccess the instructions and executes them.
The input 'Ctrl+D' EOF - end-of-file will exit the program.
User hits Ctrl+d in the third line.
($) ./shell
($) ^C
($) ^D
- Usage:
env - Prints the current environment.
Example:
($) ./shell
($) env
SHELL=/bin/bash
...
- Usage:
exit - Exits the shell.
Example:
($) ./shell
($) exit
$ ./shell
($) ls -l
-rw-rw-r-- 1 vagrant vagrant 2355 Dec 3 18:44 '#README.md#'
-rw-rw-r-- 1 vagrant vagrant 1586 Dec 3 17:39 '#check_command.c#'
-rw-rw-r-- 1 vagrant vagrant 164 Dec 3 17:06 AUTHORS
-rw-rw-r-- 1 vagrant vagrant 2479 Dec 3 17:09 README.md
-rw-rw-r-- 1 vagrant vagrant 1100 Dec 3 17:06 addtokens.c
-rw-rw-r-- 1 vagrant vagrant 1482 Dec 3 17:06 builtins.c
-rw-rw-r-- 1 vagrant vagrant 1566 Dec 3 18:11 check_command.c
-rw-rw-r-- 1 vagrant vagrant 427 Dec 3 17:28 frees.c
-rw-rw-r-- 1 vagrant vagrant 1033 Dec 3 17:30 hsh.h
-rw-rw-r-- 1 vagrant vagrant 951 Dec 3 17:35 main.c
-rw-rw-r-- 1 vagrant vagrant 1482 Dec 3 17:06 man_1_simple_shell
-rw-rw-r-- 1 vagrant vagrant 2482 Dec 3 17:07 re.md
-rwxrwxr-x 1 vagrant vagrant 18168 Dec 3 18:40 shell
-rw-rw-r-- 1 vagrant vagrant 1780 Dec 3 17:06 strings.c
($) pwd
/home/vagrant/simple-shell-test
($) exit
$
| FILE | DESCRIPTION |
|---|---|
| main.c | Main function for UNIX command line interpreter |
| hsh.h | Header file with all prototypes and imported libraries |
| builtins.c | It contains function for builtin commands |
| check_command.c | This file contain the functions for get environment, find path and print error |
| frees.c | It contins the functions for free the memory |
| AUTHORS | Contains authors of the project |
| man_1_simple_shell | Man page with documentation of simple shell |
| strings.c | String manipulation functions |
| addtokens.c | Tokenize and create double pointer with command arguments |
- Jhon Bueno
- Juan Camilo Arce.
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