System Components

// Kernel provides core schemes
const KERNEL_SCHEMES: &[&str] = &[
    "debug",   // Debug output
    "event",   // Event notification
    "memory",  // Physical memory access
    "pipe",    // Pipe IPC
    "serio",   // Serial I/O
    "irq",     // Interrupt handling
    "time",    // System time
    "sys",     // System information
];

// RedoxFS structure (simplified)
pub struct RedoxFS {
    disk: Disk,
    header: Header,
    nodes: BTreeMap<u64, Node>,
    // CoW allocation
}

impl Scheme for RedoxFS {
    fn open(&mut self, path: &str, flags: OpenFlags) -> Result<usize>;
    fn read(&mut self, id: usize, buf: &mut [u8]) -> Result<usize>;
    fn write(&mut self, id: usize, buf: &[u8]) -> Result<usize>;
    // ...
}

# Network initialization from base.toml
[files]
path = "/usr/lib/init.d/10_net"
data = """
requires_weak 00_drivers
notify smolnetd
nowait dhcpd
"""

use std::net::TcpStream;
use std::io::{Read, Write};

fn main() -> std::io::Result<()> {
    // Opens tcp: scheme via smolnetd
    let mut stream = TcpStream::connect("example.com:80")?;
    
    stream.write_all(b"GET / HTTP/1.0\r\n\r\n")?;
    
    let mut response = String::new();
    stream.read_to_string(&mut response)?;
    
    println!("Response: {}", response);
    Ok(())
}

// Creating a window via orbital: scheme
use orbclient::{Color, Renderer, Window};

fn main() {
    let mut window = Window::new(
        100, 100, 800, 600,
        "My Application"
    ).unwrap();
    
    window.set(Color::rgb(255, 255, 255));
    window.sync();
    
    // Event loop
    'events: loop {
        for event in window.events() {
            // Handle keyboard, mouse, etc.
        }
    }
}

# Ion shell configuration
[users.root]
shell = "/usr/bin/ion"

[users.user]
shell = "/usr/bin/ion"

// Standard C programs work on Redox
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main() {
    // These POSIX functions are provided by relibc
    char cwd[PATH_MAX];
    getcwd(cwd, sizeof(cwd));
    printf("Current directory: %s\n", cwd);
    
    FILE* f = fopen("/file/data.txt", "r");
    if (f) {
        // File I/O works through Redox schemes
        char buf[256];
        fgets(buf, sizeof(buf), f);
        printf("Content: %s", buf);
        fclose(f);
    }
    
    return 0;
}

use redox_scheme::Scheme;
use libredox::flag::*;

// Open a scheme URL
let fd = libredox::call::open(
    "tcp:example.com:80",
    O_RDWR | O_CLOEXEC
)?;

// Write data
libredox::call::write(fd, b"GET / HTTP/1.0\r\n\r\n")?;

// Read response
let mut buffer = [0u8; 4096];
let bytes_read = libredox::call::read(fd, &mut buffer)?;

// Close
libredox::call::close(fd)?;

# Package repository configuration from base.toml
[[files]]
path = "/etc/pkg.d/50_redox"
data = "https://static.redox-os.org/pkg"

# From base.toml: /usr/lib/init.d/00_base
# Clear and recreate tmpdir with 0o1777 permission
rm -rf /tmp
mkdir -m a=rwxt /tmp

notify ipcd   # Start IPC coordinator
notify ptyd   # Start pseudo-terminal daemon
nowait sudo --daemon  # Start privilege daemon

# From base.toml: /usr/lib/init.d/00_drivers
requires_weak 00_base
pcid-spawner  # PCI device manager spawns drivers

# From base.toml: /usr/lib/init.d/10_net
requires_weak 00_drivers
notify smolnetd  # Start network stack
nowait dhcpd     # Start DHCP client

# Standard Unix commands work as expected
ls -la /
ps aux
netstat -an
top
free -h
df -h

# Device file symlinks from base.toml
/dev/null    -> /scheme/null
/dev/random  -> /scheme/rand
/dev/urandom -> /scheme/rand
/dev/zero    -> /scheme/zero
/dev/tty     -> libc:tty
/dev/stdin   -> libc:stdin
/dev/stdout  -> libc:stdout
/dev/stderr  -> libc:stderr