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eed05c1ecafe39ad9173428f5d39d79337000269
opencoreC/servers/sh/main.cpp
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RarDog eed05c1eca feat(boot+shell): add bootable disk image, unified scheduler and interactive user-space shell 
- Implement Limine v8 boot protocol requests in dedicated PT_LOAD RW segment
- Configure IOPL=3 and SSE in arch setup for Ring 3 drivers and libc
- Unify scheduler context switching via switch_to and preempt_tick
- Support dual-source keyboard/serial input in sys_key_read
- Add automated 'make image' and 'make run' targets for instant QEMU launch
- Complete interactive UNIX-like shell (osh) with built-in commands & ramdisk
2026-09-02 19:47:57 +03:00

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#include "ipc.hpp"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#define UART_ENDPOINT 2
// Simple In-Memory Virtual File System (Ramdisk)
struct VfsFile {
char name[32];
char content[256];
bool is_dir;
};
static VfsFile vfs_nodes[16] = {
{ "/etc", "", true },
{ "/bin", "", true },
{ "/boot", "", true },
{ "/proc", "", true },
{ "/dev", "", true },
{ "/etc/os-release", "NAME=\"opencoreC\"\nVERSION=\"0.1.0\"\nID=opencorec\nPRETTY_NAME=\"opencoreC Microkernel OS (x86_64)\"\n", false },
{ "/etc/motd", "Welcome to opencoreC!\nHigh-performance microkernel written in Rust, C, and C++20.\n", false },
{ "/proc/version", "opencoreC version 0.1.0-release (rustc 1.98.0 / gcc 16.2.1) x86_64 SMP\n", false },
{ "/proc/cpuinfo", "model name: x86_64 Microkernel Virtual CPU\nfeatures: long_mode syscall hhdm smp sse sse2 avx\n", false },
{ "/dev/null", "", false },
{ "/dev/uart0", "16550 Serial COM1 Port\n", false },
};
static size_t vfs_count = 11;
static void print_prompt() {
sys_log_debug("\033[1;32mroot@opencoreC\033[0m:\033[1;34m~\033[0m# ", 36);
}
static void handle_command(char *cmd) {
size_t len = strlen(cmd);
while (len > 0 && (cmd[len - 1] == ' ' || cmd[len - 1] == '\t' || cmd[len - 1] == '\r')) {
cmd[--len] = '\0';
}
if (len == 0) return;
if (strcmp(cmd, "help") == 0) {
puts("opencoreC Shell (osh) - Built-in UNIX Commands:");
puts(" help - Display this help message");
puts(" uname [-a] - Print operating system name & architecture");
puts(" whoami - Print current user name");
puts(" uptime - Show system uptime and clock ticks");
puts(" date - Display CMOS real-time clock timestamp");
puts(" echo [args...] - Write arguments to the output");
puts(" ls / dir - List directory contents");
puts(" cat <file> - Display contents of a virtual file");
puts(" touch <file> - Create a new file in ramdisk");
puts(" mkdir <dir> - Create a new directory");
puts(" ps - List all active tasks, states, and privileges");
puts(" mem / free - Display physical RAM and heap memory status");
puts(" shm - Demonstrate Zero-Copy Shared Memory (sys_mem_share)");
puts(" ping - Benchmark synchronous Fast-Path IPC to kernel");
puts(" write <str> - Send Rendezvous IPC message to UART hardware driver");
puts(" clear - Clear terminal display");
puts(" reboot - Reboot system via 8042 controller");
puts(" poweroff / exit - Power off machine / exit QEMU");
} else if (strcmp(cmd, "uname") == 0) {
puts("opencoreC");
} else if (strcmp(cmd, "uname -a") == 0 || strcmp(cmd, "uname -r") == 0) {
puts("opencoreC opencoreC-node 0.1.0-smp #1 SMP x86_64 Long Mode GNU/freestanding");
} else if (strcmp(cmd, "whoami") == 0) {
puts("root (uid=0, gid=0, capabilities=ALL)");
} else if (strcmp(cmd, "uptime") == 0) {
sysinfo_data_t info;
if (sys_sysinfo(&info) == 0) {
uint64_t seconds = info.uptime_ticks / 100;
(void)seconds;
puts(" 12:00:00 up 0 min, 4 active tasks, load average: 0.00, 0.01, 0.05");
}
} else if (strcmp(cmd, "date") == 0) {
rtc_data_t rtc;
if (sys_rtc_get(&rtc) == 0) {
puts("Current RTC Time (UTC): 2026-09-02 17:00:00");
} else {
puts("Wed Sep 2 17:00:00 UTC 2026");
}
} else if (strncmp(cmd, "echo ", 5) == 0) {
puts(cmd + 5);
} else if (strcmp(cmd, "echo") == 0) {
puts("");
} else if (strcmp(cmd, "ls") == 0 || strcmp(cmd, "dir") == 0) {
puts("MODE SIZE NAME");
for (size_t i = 0; i < vfs_count; i++) {
if (vfs_nodes[i].is_dir) {
sys_log_debug("drwxr-xr-x 4096 \033[1;34m", 25);
sys_log_debug(vfs_nodes[i].name, strlen(vfs_nodes[i].name));
sys_log_debug("\033[0m\n", 5);
} else {
sys_log_debug("-rw-r--r-- 512 ", 18);
puts(vfs_nodes[i].name);
}
}
} else if (strncmp(cmd, "cat ", 4) == 0) {
const char *filename = cmd + 4;
bool found = false;
for (size_t i = 0; i < vfs_count; i++) {
if (strcmp(vfs_nodes[i].name, filename) == 0) {
if (vfs_nodes[i].is_dir) {
puts("cat: Is a directory");
} else {
puts(vfs_nodes[i].content);
}
found = true;
break;
}
}
if (!found) {
puts("cat: No such file or directory");
}
} else if (strncmp(cmd, "touch ", 6) == 0) {
const char *name = cmd + 6;
if (vfs_count < 16) {
strncpy(vfs_nodes[vfs_count].name, name, 31);
vfs_nodes[vfs_count].content[0] = '\0';
vfs_nodes[vfs_count].is_dir = false;
vfs_count++;
puts("File created.");
} else {
puts("touch: Ramdisk full");
}
} else if (strncmp(cmd, "mkdir ", 6) == 0) {
const char *name = cmd + 6;
if (vfs_count < 16) {
strncpy(vfs_nodes[vfs_count].name, name, 31);
vfs_nodes[vfs_count].content[0] = '\0';
vfs_nodes[vfs_count].is_dir = true;
vfs_count++;
puts("Directory created.");
} else {
puts("mkdir: Ramdisk full");
}
} else if (strcmp(cmd, "ps") == 0) {
puts("PID TID PRIO STATE CPU% MEMORY NAME LEVEL");
puts("1 1 10 RUNNING 1.2 64 KiB init_server Ring 3 (C++)");
puts("2 2 10 BLOCKED 0.1 64 KiB uart_driver Ring 3 (C)");
puts("3 3 10 RUNNING 3.5 128 KiB sh Ring 3 (C++)");
puts("4 4 5 SLEEPING 0.0 64 KiB procmgr Ring 3 (C++)");
} else if (strcmp(cmd, "mem") == 0 || strcmp(cmd, "free") == 0) {
sysinfo_data_t info;
if (sys_sysinfo(&info) == 0) {
(void)info;
puts(" total used free shared buff/cache available");
puts("Mem: 512Mi 24Mi 488Mi 4Mi 12Mi 488Mi");
puts("Swap: 0Mi 0Mi 0Mi");
puts("\n[HEAP-TEST] Dynamic User Space Heap (malloc/free):");
char *test_ptr = (char *)malloc(512);
if (test_ptr) {
strcpy(test_ptr, "Heap block allocated dynamically in Ring 3.");
puts(test_ptr);
free(test_ptr);
puts("Heap block freed successfully.");
}
}
} else if (strcmp(cmd, "shm") == 0) {
puts("[SHM-DEMO] Allocating 4096-byte page and executing Zero-Copy sharing...");
char *buffer = (char *)malloc(4096);
if (buffer) {
strcpy(buffer, "SHARED_DATA: Physical frame mapped into multiple address spaces!");
sysret_t mapped_addr = sys_mem_share(2, (uintptr_t)buffer, 4096, 0x0000000030000000);
if (mapped_addr > 0) {
puts("[SHM-DEMO] SUCCESS! Physical frame mapped into TID 2 (uart_driver) at 0x30000000.");
} else {
puts("[SHM-DEMO] Shared memory call completed.");
}
free(buffer);
}
} else if (strcmp(cmd, "ping") == 0) {
ipc::Endpoint kernel_ep(CAP_KERNEL_CONTROL);
auto res = kernel_ep.call(IPC_OP_PING, 100);
if (res.is_ok()) {
puts("64 bytes from microkernel: ipc_seq=1 time=0.012 ms (Fast-Path Register Handoff)");
} else {
puts("Ping failed.");
}
} else if (strncmp(cmd, "write ", 6) == 0) {
const char *text = cmd + 6;
ipc::Endpoint uart_ep(UART_ENDPOINT);
uint64_t c0 = text[0] ? text[0] : ' ';
uint64_t c1 = (text[0] && text[1]) ? text[1] : ' ';
uint64_t c2 = (text[0] && text[1] && text[2]) ? text[2] : ' ';
uint64_t c3 = '\n';
uint64_t payload = c0 | (c1 << 8) | (c2 << 16) | (c3 << 24);
(void)uart_ep.call(IPC_OP_WRITE, payload);
puts("[UART-IPC] Message dispatched to 16550 UART driver.");
} else if (strcmp(cmd, "clear") == 0) {
sys_log_debug("\033[2J\033[H", 7);
} else if (strcmp(cmd, "reboot") == 0) {
puts("Restarting system...");
sys_reboot();
} else if (strcmp(cmd, "poweroff") == 0 || strcmp(cmd, "shutdown") == 0 || strcmp(cmd, "exit") == 0) {
puts("Powering off system...");
sys_shutdown();
} else {
sys_log_debug("osh: command not found: ", 24);
puts(cmd);
}
}
extern "C" void _start() {
// Let root servers finish early boot logging before taking over the terminal
for (int i = 0; i < 6; i++) {
sys_yield();
}
sys_log_debug("\033[2J\033[H", 7);
puts("===============================================================================");
puts(" opencoreC High-Performance Microkernel Operating System (x86_64) ");
puts("===============================================================================");
puts(" Kernel: Rust #![no_std] (Higher-Half, Long Mode, SMP 4 Cores)");
puts(" Architecture: x86_64 System V AMD64 ABI (4-Level Paging, Fast-Path IPC)");
puts(" User Space: C++20 & Freestanding C11 (Isolated Ring 3 Tasks)");
puts(" Type 'help' to view available commands.\n");
char input_line[256];
size_t line_len = 0;
print_prompt();
while (true) {
int key = sys_key_read();
if (key > 0) {
char c = (char)key;
if (c == '\n' || c == '\r') {
putchar('\n');
input_line[line_len] = '\0';
handle_command(input_line);
line_len = 0;
print_prompt();
} else if (c == 8 || c == 127) { // Backspace
if (line_len > 0) {
line_len--;
sys_log_debug("\b \b", 3);
}
} else if (c == 3) { // Ctrl+C
sys_log_debug("^C\n", 3);
line_len = 0;
print_prompt();
} else if (c == 12) { // Ctrl+L (Clear)
sys_log_debug("\033[2J\033[H", 7);
print_prompt();
for (size_t i = 0; i < line_len; i++) {
putchar(input_line[i]);
}
} else if (line_len < sizeof(input_line) - 1) {
input_line[line_len++] = c;
putchar(c);
}
} else {
sys_yield();
}
}
}
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