This project is a simple implementation of an unix shell (LSH) in C. It demonstrates the basic functionalities of a shell. That is: read, parse, fork, exec, and wait. Since my purpose was to learn how shell works and build basic functionalities, this shell is not meant for feature completeness or even fitness for casual use.
It has many limitations, including:
- 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,help,exit.
C program can be written and executed on any machine that has a suitable environment to run the program. Clanfg, MinGW compiler (Minimalist GNU for Windows), Portable 'C' compiler, and Turbo C are popular compilers available. I am using GCC Compiler. It is recommended using an IDE to run C programs. An IDE includes a compiler, editor and debugger.
Firstly, use the following command to check if your system has gcc installed or not:
gcc -v
If your system doesn't have gcc installed, here is the link to download GCC complier for Windows, Linux and Mac. Moreover, you can download Code::Blocks (IDE) which bundles a compiler (gcc offered by Free Software Foundation GNU), editor and debugger in a neat package.
Compile:
gcc -o lsh src/main.c
Run:
./lsh
If you would like to use the standard-library based implementation of lsh_read_line(), then
you can do:
gcc -DLSH_USE_STD_GETLINE -o lsh src/main.c.
MIT License Copyright (c) 2021 Daljeet Singh
Refer to LICENSE file for full information.