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Small improvements and bug fixes #1

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Small improvements and bug fixes #1

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2101773
networking beta
BoredDevNL Jan 15, 2026
4850ab3
new build
BoredDevNL Jan 15, 2026
fc13128
bug fixes
BoredDevNL Jan 16, 2026
5949138
Update .gitignore
BoredDevNL Jan 16, 2026
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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -2,3 +2,4 @@ BrewKernel/.DS_Store
BrewKernel/build/.DS_Store
BrewKernel/build/x86_64/.DS_Store
.DS_Store
.vscode/
Binary file modified BrewKernel/build/kernel/main.o
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59 changes: 16 additions & 43 deletions BrewKernel/src/impl/kernel/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -54,10 +54,9 @@
#include "shell_cli.h"
#include "APPS/calc.h"

// External assembly function to initialize IDT
extern void init_idt(void);

// Enable to automatically enter the CLI on boot. Set to 0 to disable this, probably no reason to do this might be handy though.
// Enable to automatically enter the CLI on boot. Set to 0 to disable this (probably no reason to do this) but it *might* be handy for some dumb reason.
#ifndef AUTO_START_CLI
#define AUTO_START_CLI 1
#endif
Expand All @@ -70,16 +69,16 @@ static int strcmp_kernel(const char *s1, const char *s2) {
return *(const unsigned char*)s1 - *(const unsigned char*)s2;
}

// CLI state and buffer
// DONT TOUCH this
static char command_buffer[256];
int buffer_pos = 0;

// Command history
// same here, shit likes to break if you do
#define HISTORY_SIZE 10
static char command_history[HISTORY_SIZE][256];
static int history_count = 0; // Number of commands in history
static int history_current = -1; // Current position in history while navigating
static int history_newest = -1; // Index of the most recent command
static int history_count = 0;
static int history_current = -1;
static int history_newest = -1;
static int in_cli_mode = 0;
static int timezone_offset_h = 0;
static int timezone_offset_m = 0;
Expand Down Expand Up @@ -178,7 +177,6 @@ static int split_command(char *cmd, char *args[], int max_args) {
return arg_count;
}

// Find pipe operator in command string
static const char* find_pipe(const char* cmd) {
while (*cmd) {
if (*cmd == '|') {
Expand All @@ -203,27 +201,22 @@ static void process_command(void) {
}
cmd_upper[i] = '\0';

// Check for pipe operator
const char* pipe_pos = find_pipe(command_buffer);
if (pipe_pos) {
// Handle piped commands
char left_cmd[256] = {0};
char right_cmd[256] = {0};

// Extract left command (before pipe)
size_t left_len = pipe_pos - command_buffer;
if (left_len >= sizeof(left_cmd)) left_len = sizeof(left_cmd) - 1;
for (size_t j = 0; j < left_len; j++) {
left_cmd[j] = command_buffer[j];
}
left_cmd[left_len] = '\0';

// Trim trailing spaces from left command
while (left_len > 0 && left_cmd[left_len - 1] == ' ') {
left_cmd[--left_len] = '\0';
}

// Extract right command (after pipe)
const char* right_start = pipe_pos + 1;
while (*right_start == ' ') right_start++;

Expand All @@ -234,14 +227,10 @@ static void process_command(void) {
}
right_cmd[right_len] = '\0';

// Trim trailing spaces from right command
while (right_len > 0 && right_cmd[right_len - 1] == ' ') {
right_cmd[--right_len] = '\0';
}

// Handle pipe: extract content from left command and pass to right command
// Currently support: CAT <file> | UDPSEND <ip> <port>

char left_upper[256] = {0};
for (i = 0; left_cmd[i]; i++) {
left_upper[i] = left_cmd[i] >= 'a' && left_cmd[i] <= 'z'
Expand All @@ -258,7 +247,6 @@ static void process_command(void) {
}
right_upper[i] = '\0';

// Handle CAT command piped
if (strncmp_kernel(left_upper, "CAT ", 4) == 0) {
const char* file_path = left_cmd + 4;
while (*file_path == ' ') file_path++;
Expand All @@ -267,19 +255,16 @@ static void process_command(void) {
const char* file_content = fs_read_file_at_path(file_path, &file_size);

if (file_content && file_size > 0) {
// Limit file size to prevent overflow
if (file_size > 4096) {
brew_str("\nFile too large (max 4KB for UDP pipe)\n");
brew_str("\nFile too large (max 4KB for UDP pipe)\n"); // dont touch this youll get a stack overflow and break the system <3
} else if (strncmp_kernel(right_upper, "UDPSEND ", 8) == 0) {
// Parse UDPSEND arguments from right_cmd
const char* args = right_cmd + 8;
while (*args == ' ') args++;

brew_str("\n");
if (!network_is_initialized()) {
brew_str("Network not initialized. Use NETINIT first.\n");
} else {
// Parse IP address
ipv4_address_t dest_ip;
int ip_bytes[4] = {0};
int ip_idx = 0;
Expand All @@ -304,15 +289,13 @@ static void process_command(void) {
dest_ip.bytes[k] = (uint8_t)ip_bytes[k];
}

// Parse port
while (*p == ' ') p++;
int port = 0;
while (*p >= '0' && *p <= '9') {
port = port * 10 + (*p - '0');
p++;
}

// Send UDP packet(s) with file content (chunked if necessary)
const size_t chunk_size = 512;
size_t offset = 0;
int chunk_count = 0;
Expand All @@ -324,7 +307,6 @@ static void process_command(void) {
to_send = chunk_size;
}

// Send directly from file content pointer
int result = udp_send_packet(&dest_ip, (uint16_t)port, 54321,
(const void*)(file_content + offset), to_send);
if (result == 0) {
Expand Down Expand Up @@ -359,7 +341,9 @@ static void process_command(void) {
}

bool return_to_prompt = true;

// command handlind here, it isn't the best solution but it works
// You basically just add a new .h file for your app, include whatever modules you need in that file
// and then call the function here in the if-else chain. (super efficient 100%)
if (strcmp_kernel(cmd_upper, "HELP") == 0) {
display_help();
}
Expand Down Expand Up @@ -484,19 +468,17 @@ static void process_command(void) {
const char* args = command_buffer + 5;
while (*args == ' ') args++;

// Look for redirection operator >
char redirect_path[256] = {0};
const char* redirect_pos = args;
bool found_redirect = false;
int redirect_idx = 0;

// Find the > character
while (*redirect_pos) {
if (*redirect_pos == '>') {
found_redirect = true;
redirect_pos++; // skip the >
while (*redirect_pos == ' ') redirect_pos++; // skip spaces
// Copy redirect path
redirect_pos++;
while (*redirect_pos == ' ') redirect_pos++;

redirect_idx = 0;
while (*redirect_pos && redirect_idx < 255) {
redirect_path[redirect_idx++] = *redirect_pos;
Expand All @@ -509,8 +491,6 @@ static void process_command(void) {
}

if (found_redirect && redirect_path[0] != '\0') {
// Write to file
// Get the text to echo (everything before >)
char echo_text[256] = {0};
int text_idx = 0;
const char* text_ptr = args;
Expand All @@ -520,7 +500,6 @@ static void process_command(void) {
}
echo_text[text_idx] = '\0';

// Trim trailing spaces from echo text
while (text_idx > 0 && echo_text[text_idx - 1] == ' ') {
echo_text[--text_idx] = '\0';
}
Expand All @@ -531,7 +510,6 @@ static void process_command(void) {
brew_str("'\n");
}
} else {
// Just print to console
brew_str("\n");
brew_str(args);
brew_str("\n");
Expand Down Expand Up @@ -755,17 +733,15 @@ void kernel_main(void* multiboot_info) {
#endif

while (1) {
// Process network frames continuously
for (int i = 0; i < 10; i++) {
network_process_frames();
}
net_check_udp_received(); // Check for and print UDP receive notifications
net_check_udp_received();

if (check_keyboard()) {
unsigned char scan_code = read_scan_code();

// special keys
if (scan_code == 0x0E) { // Backspace
if (scan_code == 0x0E) {
if (buffer_pos > 0) {
buffer_pos--;
print_backspace();
Expand All @@ -775,10 +751,8 @@ void kernel_main(void* multiboot_info) {
} else if (scan_code == SCAN_CODE_DOWN_ARROW && in_cli_mode) {
navigate_history(1); // Navigate forwards in history
} else {
// Convert scan code to ASCII and print if it's a printable character
char ascii_char = scan_code_to_ascii(scan_code);
if (ascii_char != 0) {
// Handle special characters
if (ascii_char == '\n' || ascii_char == '\r') {
if (!in_cli_mode) {
command_buffer[buffer_pos] = '\0';
Expand All @@ -804,8 +778,7 @@ void kernel_main(void* multiboot_info) {
} else {
process_command();
}

// Process network frames after command execution

for (int i = 0; i < 10; i++) {
network_process_frames();
}
Expand Down
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