hsh (Holberton shell) is an implementation of a shell in C that seeks to emulate the basic functionality of the original sh (Thompson shell), but hopefully with much-improved memory management!
The hsh utilizes a dynamic memory allocation system in an attempt to ensure no memory leakages.
The hsh is able to be utilized in interactive and non-interactive modes.
It reads from standard input and parses the input, interpreting if commands are builtins or system commands. It initializes non-builtin commands utilizing the fork() function to ensure that the shell program remains active in the parent process whilst and until execution completes.
As the hsh emulates basic shell functionality, the following limitations are observed:
- Commands must be on a single line.
- Arguments must be separated by whitespace.
- No quoting arguments or escaping whitespace.
- No piping or redirection.
- Only builtins are:
cd,env,exit
All of the c files in this repository, as well as the header file, must be present in a directory and compiled with hsh as the name of the executable.
Example:
gcc *.c -o hshInteractive Mode:
$ ./hsh
($) /bin/ls
hsh main.c shell.c
($)
($) exit
$Non-Interactive Mode:
$ echo "/bin/ls" | ./hsh
hsh main.c shell.c test_ls_2$ cat test_ls_2
/bin/ls
/bin/ls
$ cat test_ls_2 | ./hsh
hsh main.c shell.c test_ls_2
hsh main.c shell.c test_ls_2
$Any pull requests for adding features or fixing bugs will be manually reviewed. Please see the AUTHORS file for contact information.
This code is in the public domain (see UNLICENSE for more details). This means you can use, modify, and distribute it without any restriction. We appreciate, but don't require, acknowledgement in derivative works.