Command execution
Parse commands and launch programs using the operating system's process model.
fork() + execve()
Built in C · Unix-like shell
Small shell. Big energy.
FlameOShell is a lightweight Unix-like shell built in C, featuring process management, pipes, redirection, background jobs, job control, and signal handling.
flame@oshell
:~$
./flameoshell
🔥 FlameOShell started
flame@oshell
:~$
ls
flameoshell.c Makefile README.md LICENSE frontend/
flame@oshell
:~$
echo "hello"
hello
flame@oshell
:~$
C
Core language
Unix
Shell architecture
POSIX
System concepts
🔥
Flame powered
01
CAPABILITIES
Everything you expect from a shell.
FlameOShell brings together the fundamental Unix process and shell concepts into one lightweight program.
Pipes
Connect processes together and move output from one command directly into another.
pipe()Redirection
Redirect standard input and output using files, just like a traditional Unix shell.
open() + dup2()Background jobs
Run processes in the background while keeping the shell available for more commands.
& + jobsJob control
Move processes between foreground and background execution with shell-level job management.
fg + bgSignal handling
Handle process signals and terminal events while maintaining control of running jobs.
sigaction()
02
INTERACTIVE DEMO
Get your hands dirty.
This browser terminal is a demo of the FlameOShell experience. Type a command below and see what happens.
🔥 FlameOShell
web demo
Type help to see
available commands.
03
UNDER THE HOOD
From command to process.
A shell looks simple from the outside. Underneath, it is coordinating processes, file descriptors, signals, and the operating system.
01
Input
The shell receives a command from the user.
→
02
Parse
Arguments, pipes, redirection and job modifiers are interpreted.
→
03
Process
Processes are created and connected using system calls.
→
04
Execute
The operating system runs the requested command.
fork()
execve()
waitpid()
pipe()
open()
dup2()
kill()
sigaction()
setpgid()
🔥
Want to run the real thing?
Clone the repository, build it locally, and launch FlameOShell from your own terminal.
$
Explore the repository ↗
git clone https://github.com/raynerdcunha/flameoshell.git