A simple shell
Our homemade command line interpreter provides the user with a way to interact with their system. It is designed to function similarly to the dash unix shell. By taking input either interactively or piped in via standard input (see usage below), simple_shell will attempt to execute commands by searching for built-ins and in the path. If a command is found, it will use the system calls fork(), execve(), and wait() to execute the input. The results will be displayed to the user including possible errors. For a more detailed featureset see the manual page: man_1_simple_shell.
Clone this repository:
git clone https://github.com/krytech/simple_shell.git
Then, compile all the files:
$ gcc *.c -o hsh
Run simple_shell with:
$ ./hsh
This will launch the shell in interactive mode which will display a command prompt ($ ) and the shell will wait for input.
Type the name of any command to execute it:
$ echo Hello World!
The shell may be used in non-interactive mode by piping or otherwise redirecting input into it (from any shell including itself):
arbitrary-shell$ echo ls | ./hsh
Simple_shell offers the following built-ins:
cd [directory] - (WIP) Changes the present working directory to directory. If no directory is entered, cd will change to the $HOME directory (run env to view the path of $HOME).
env - Displays all of the shell environment variables.
exit [status] - Exits the shell with exit code status. If no status is entered, the shell exits with the stauts of the last executed command.
Simple_shell also supports the use of the command separator ;. Use it to execute multiple commands in a single line:
$ which ls ; echo "Here it is!"
simple_shell.c - Main simple_shell functions.
built-ins.c - Builtin functions for cd and exit.
PATH_search.c - Function to dynamically search the $PATH.
error_handle.c - Handles potential errors.
linkedlist.c - Various functions to help with linked lists.
string.c - Helper functions related to strings.
globals.c - Helper functions for environmental variables and line count.
_strtok.c - Hommemade strtok function.
shell.h - Header file containing all function prototypes, structs and libraries.
README.md - Description of the simple_shell program.
man_1_simple_shell - Manual page for simple_shell.
AUTHORS - Authors.
Carson Stearn cstearn@gmail.com @krytech
Justin Masayda 2705@holbertonschool.com @keysmusician