diff --git a/.DS_Store b/.DS_Store index efd6406..315d14c 100644 Binary files a/.DS_Store and b/.DS_Store differ diff --git a/Makefile b/Makefile index d39da74..a397667 100644 --- a/Makefile +++ b/Makefile @@ -119,4 +119,5 @@ run: $(ISO_IMAGE) qemu-system-x86_64 -m 2G -serial stdio -cdrom $(ISO_IMAGE) -boot d \ -audiodev coreaudio,id=audio0 -machine pcspk-audiodev=audio0 \ -netdev user,id=net0,hostfwd=udp::12345-:12345 -device e1000,netdev=net0 \ - -vga std -global VGA.xres=1920 -global VGA.yres=1080 + -vga std -global VGA.xres=1920 -global VGA.yres=1080 \ + -drive file=disk.img,format=raw diff --git a/boredos.iso b/boredos.iso index 2a638ac..2fd0d7f 100644 Binary files a/boredos.iso and b/boredos.iso differ diff --git a/build/about.o b/build/about.o index 910e3ba..9837b6a 100644 Binary files a/build/about.o and b/build/about.o differ diff --git a/build/boredos.elf b/build/boredos.elf index a26fb99..47599cf 100755 Binary files a/build/boredos.elf and b/build/boredos.elf differ diff 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a/build/ps2.o and b/build/ps2.o differ diff --git a/build/rtc.o b/build/rtc.o index ffe2d25..cc7d7b2 100644 Binary files a/build/rtc.o and b/build/rtc.o differ diff --git a/build/tcp.o b/build/tcp.o index 204675a..9ed1496 100644 Binary files a/build/tcp.o and b/build/tcp.o differ diff --git a/build/vm.o b/build/vm.o index 32b0d49..22626af 100644 Binary files a/build/vm.o and b/build/vm.o differ diff --git a/build/wm.o b/build/wm.o index f920dfe..eeca14a 100644 Binary files a/build/wm.o and b/build/wm.o differ diff --git a/disk.img b/disk.img new file mode 100644 index 0000000..2c13218 Binary files /dev/null and b/disk.img differ diff --git a/iso_root/boredos.elf b/iso_root/boredos.elf index a26fb99..47599cf 100755 Binary files a/iso_root/boredos.elf and b/iso_root/boredos.elf differ diff --git a/src/kernel/about.c b/src/kernel/about.c index e72b9e6..52fcc88 100644 --- a/src/kernel/about.c +++ b/src/kernel/about.c @@ -14,8 +14,8 @@ static void about_paint(Window *win) { // Version info draw_string(offset_x, offset_y + 105, "BoredOS 'Panda'", COLOR_BLACK); - draw_string(offset_x, offset_y + 120, "BoredOS Version 1.50", COLOR_BLACK); - draw_string(offset_x, offset_y + 135, "Kernel Version 2.4.0", COLOR_BLACK); + draw_string(offset_x, offset_y + 120, "BoredOS Version 1.51", COLOR_BLACK); + draw_string(offset_x, offset_y + 135, "Kernel Version 2.5.0", COLOR_BLACK); // Copyright draw_string(offset_x, offset_y + 150, "(C) 2026 boreddevnl.", COLOR_BLACK); diff --git a/src/kernel/cmd.c b/src/kernel/cmd.c index 0e2d714..27ed64b 100644 --- a/src/kernel/cmd.c +++ b/src/kernel/cmd.c @@ -6,6 +6,7 @@ #include "notepad.h" #include "calculator.h" #include "fat32.h" +#include "disk.h" #include "cli_apps/cli_apps.h" #include "licensewr.h" #include @@ -21,7 +22,6 @@ #define CMD_ROWS 41 #define LINE_HEIGHT 10 #define CHAR_WIDTH 8 -#define PROMPT "> " #define COLOR_RED 0xFFFF0000 @@ -39,6 +39,12 @@ typedef enum { MODE_PAGER } CmdMode; +// CMD Window State (per-window context) +typedef struct { + char current_drive; + char current_dir[256]; +} CmdState; + // --- State --- Window win_cmd; @@ -47,6 +53,7 @@ static CharCell screen_buffer[CMD_ROWS][CMD_COLS]; static int cursor_row = 0; static int cursor_col = 0; static uint32_t current_color = COLOR_LTGRAY; +static CmdState *cmd_state = NULL; // Will be set in cmd_init // Pager State static CmdMode current_mode = MODE_SHELL; @@ -139,8 +146,18 @@ static void cmd_history_add(const char *cmd) { if (history_len < HISTORY_MAX) history_len++; } +static void cmd_print_prompt(void) { + char buf[5]; + buf[0] = cmd_state ? cmd_state->current_drive : 'A'; + buf[1] = ':'; + buf[2] = '>'; + buf[3] = ' '; + buf[4] = 0; + cmd_write(buf); +} + static void cmd_clear_line_content(void) { - int prompt_len = cmd_strlen(PROMPT); + int prompt_len = 4; // "A:> " for (int i = prompt_len; i < CMD_COLS; i++) { screen_buffer[cursor_row][i].c = ' '; screen_buffer[cursor_row][i].color = current_color; @@ -327,6 +344,204 @@ void pager_set_mode(void) { } // Internal LS command to avoid stack overflow in external module +static void cmd_update_dir(const char *path); // Forward declaration + +static void internal_cmd_pwd(char *args) { + (void)args; + if (cmd_state) { + char drive_str[3]; + drive_str[0] = cmd_state->current_drive; + drive_str[1] = ':'; + drive_str[2] = 0; + cmd_write(drive_str); + cmd_write(cmd_state->current_dir); + } else { + char cwd[256]; + fat32_get_current_dir(cwd, sizeof(cwd)); + cmd_write(cwd); + } + cmd_write("\n"); +} + +static void internal_cmd_cd(char *args) { + // Handle cd with proper cmd_state context + if (!args || !args[0]) { + // No argument - show current directory + if (cmd_state) { + char drive_str[3]; + drive_str[0] = cmd_state->current_drive; + drive_str[1] = ':'; + drive_str[2] = 0; + cmd_write(drive_str); + cmd_write(cmd_state->current_dir); + cmd_write("\n"); + } else { + char cwd[256]; + fat32_get_current_dir(cwd, sizeof(cwd)); + cmd_write("Current directory: "); + cmd_write(cwd); + cmd_write("\n"); + } + return; + } + + // Parse argument (remove trailing spaces/tabs) + char path[256]; + int i = 0; + while (args[i] && args[i] != ' ' && args[i] != '\t') { + path[i] = args[i]; + i++; + } + path[i] = 0; + + // For cmd_state, we need to build and validate the full path + if (cmd_state) { + // Build full path for validation + char full_path[512] = {0}; + if (path[1] == ':') { + // Has drive letter + cmd_strcpy(full_path, path); + } else if (path[0] == '/') { + // Absolute path + full_path[0] = cmd_state->current_drive; + full_path[1] = ':'; + int j = 2; + int k = 0; + while (path[k] && j < 509) { + full_path[j++] = path[k++]; + } + full_path[j] = 0; + } else { + // Relative path - resolve from current directory + full_path[0] = cmd_state->current_drive; + full_path[1] = ':'; + int j = 2; + + // Copy current directory + const char *dir = cmd_state->current_dir; + while (*dir && j < 509) { + full_path[j++] = *dir++; + } + + // Add separator if needed + if (j > 2 && full_path[j-1] != '/') { + full_path[j++] = '/'; + } + + // Add path argument + int k = 0; + while (path[k] && j < 509) { + full_path[j++] = path[k++]; + } + full_path[j] = 0; + } + + // Validate directory exists + if (fat32_is_directory(full_path)) { + // Normalize the path to resolve .. and . + char normalized_path[512]; + fat32_normalize_path(full_path, normalized_path); + + cmd_update_dir(normalized_path); + cmd_write("Changed to: "); + char drive_str[3]; + drive_str[0] = cmd_state->current_drive; + drive_str[1] = ':'; + drive_str[2] = 0; + cmd_write(drive_str); + cmd_write(cmd_state->current_dir); + cmd_write("\n"); + } else { + cmd_write("Error: Cannot change to directory: "); + cmd_write(path); + cmd_write("\n"); + } + } else { + // Fallback to global state if no cmd_state + if (fat32_chdir(path)) { + char cwd[256]; + fat32_get_current_dir(cwd, sizeof(cwd)); + cmd_write("Changed to: "); + cmd_write(cwd); + cmd_write("\n"); + } else { + cmd_write("Error: Cannot change to directory: "); + cmd_write(path); + cmd_write("\n"); + } + } +} + +static void internal_cmd_txtedit(char *args) { + // Parse the file path argument + char filepath[256]; + int i = 0; + + // Skip leading whitespace + while (args && args[i] && (args[i] == ' ' || args[i] == '\t')) { + i++; + } + + // Extract filepath (args now includes drive prefix from cmd_exec_single) + int j = 0; + while (args && args[i] && args[i] != ' ' && args[i] != '\t' && j < 255) { + filepath[j++] = args[i++]; + } + filepath[j] = 0; + + // If no filepath provided, show usage + if (j == 0) { + cmd_write("Usage: txtedit \n"); + cmd_write("Example: txtedit myfile.txt\n"); + cmd_write(" txtedit /document.txt\n"); + return; + } + + // Normalize the path (filepath already includes drive from cmd_exec_single) + char normalized_path[256]; + fat32_normalize_path(filepath, normalized_path); + + // Extract drive from normalized path to set it as current temporarily + char drive = 'A'; + if (normalized_path[1] == ':') { + drive = normalized_path[0]; + if (drive >= 'a' && drive <= 'z') drive -= 32; + } + + // Set global drive temporarily to match file's drive + char saved_drive = fat32_get_current_drive(); + fat32_change_drive(drive); + + // Open the file in the GUI editor + extern void editor_open_file(const char *filename); + extern Window win_editor; + editor_open_file(normalized_path); + + // Restore the drive + fat32_change_drive(saved_drive); + + // Make editor window visible and focused, bring to front + extern Window win_explorer; + extern Window win_cmd; + extern Window win_notepad; + extern Window win_calculator; + + win_editor.visible = true; + win_editor.focused = true; + + // Calculate max z_index to bring window to front + int max_z = 0; + if (win_explorer.z_index > max_z) max_z = win_explorer.z_index; + if (win_cmd.z_index > max_z) max_z = win_cmd.z_index; + if (win_notepad.z_index > max_z) max_z = win_notepad.z_index; + if (win_calculator.z_index > max_z) max_z = win_calculator.z_index; + win_editor.z_index = max_z + 1; + + cmd_write("Opening: "); + cmd_write(normalized_path); + cmd_write("\n"); +} + static void internal_cmd_ls(char *args) { char path[256]; if (args && *args) { @@ -386,8 +601,8 @@ static const CommandEntry commands[] = { {"math", cli_cmd_math}, {"MAN", cli_cmd_man}, {"man", cli_cmd_man}, - {"TXTEDIT", cli_cmd_txtedit}, - {"txtedit", cli_cmd_txtedit}, + {"TXTEDIT", internal_cmd_txtedit}, + {"txtedit", internal_cmd_txtedit}, {"UPTIME", cli_cmd_uptime}, {"uptime", cli_cmd_uptime}, {"BEEP", cli_cmd_beep}, @@ -405,10 +620,10 @@ static const CommandEntry commands[] = { {"EXIT", cli_cmd_exit}, {"exit", cli_cmd_exit}, // Filesystem Commands - {"CD", cli_cmd_cd}, - {"cd", cli_cmd_cd}, - {"PWD", cli_cmd_pwd}, - {"pwd", cli_cmd_pwd}, + {"CD", internal_cmd_cd}, + {"cd", internal_cmd_cd}, + {"PWD", internal_cmd_pwd}, + {"pwd", internal_cmd_pwd}, {"LS", internal_cmd_ls}, {"ls", internal_cmd_ls}, {"MKDIR", cli_cmd_mkdir}, @@ -468,6 +683,88 @@ static const CommandEntry commands[] = { {NULL, NULL} }; +// Helper to build full path with cmd window's drive context +static void cmd_build_full_path(const char *relative_path, char *full_path) { + if (!cmd_state) { + if (relative_path[0]) { + cmd_strcpy(full_path, relative_path); + } else { + full_path[0] = 'A'; + full_path[1] = ':'; + full_path[2] = '/'; + full_path[3] = 0; + } + return; + } + + // If path already has drive letter, use it as-is + if (relative_path && relative_path[1] == ':') { + cmd_strcpy(full_path, relative_path); + return; + } + + // Build path with cmd_state's drive and directory + int i = 0; + full_path[i++] = cmd_state->current_drive; + full_path[i++] = ':'; + + // Add current directory + const char *dir = cmd_state->current_dir; + while (*dir && i < 509) { + full_path[i++] = *dir++; + } + + // Add path argument + if (relative_path && relative_path[0]) { + if (i > 2 && full_path[i-1] != '/') { + full_path[i++] = '/'; + } + const char *p = relative_path; + while (*p && i < 509) { + full_path[i++] = *p++; + } + } + + full_path[i] = 0; +} + +// Helper to sync cmd window directory after cd +static void cmd_update_dir(const char *path) { + if (!cmd_state || !path) return; + + // Extract drive if provided + const char *p = path; + char drive = cmd_state->current_drive; + if (p[0] && p[1] == ':') { + drive = p[0]; + if (drive >= 'a' && drive <= 'z') drive -= 32; + p += 2; + } + + // Update drive + cmd_state->current_drive = drive; + + // Update directory + if (*p) { + // Remove trailing slashes and copy + int len = 0; + while (p[len]) len++; + while (len > 0 && p[len-1] == '/') len--; + + if (len == 0) { + cmd_state->current_dir[0] = '/'; + cmd_state->current_dir[1] = 0; + } else { + for (int i = 0; i < len && i < 255; i++) { + cmd_state->current_dir[i] = p[i]; + } + cmd_state->current_dir[len] = 0; + } + } else { + cmd_state->current_dir[0] = '/'; + cmd_state->current_dir[1] = 0; + } +} static const char* find_pipe(const char* cmd) { while (*cmd) { @@ -483,8 +780,42 @@ static void cmd_exec_single(char *cmd) { while (*cmd == ' ') cmd++; if (!*cmd) return; + // Check for drive switch (e.g. "A:", "B:") + if (cmd[0] && cmd[1] == ':' && cmd[2] == 0) { + char letter = cmd[0]; + if (letter >= 'a' && letter <= 'z') letter -= 32; + + // Check if drive exists (don't change global, just check) + if (disk_get_by_letter(letter)) { + // Update cmd window's drive, not global + if (cmd_state) { + cmd_state->current_drive = letter; + cmd_state->current_dir[0] = '/'; + cmd_state->current_dir[1] = 0; + } + } else { + cmd_write("Invalid drive.\n"); + } + return; + } + if (cmd[0] == '.' && cmd[1] == '/') { char *filename = cmd + 2; + + // Build full path with drive context + char full_exec_path[512]; + if (cmd_state && cmd_state->current_drive != 'A') { + full_exec_path[0] = cmd_state->current_drive; + full_exec_path[1] = ':'; + int i = 2; + const char *p = filename; + while (*p && i < 509) { + full_exec_path[i++] = *p++; + } + full_exec_path[i] = 0; + filename = full_exec_path; + } + FAT32_FileHandle *fh = fat32_open(filename, "r"); if (fh) { @@ -521,6 +852,168 @@ static void cmd_exec_single(char *cmd) { args++; // Point to start of args } + // For file system commands, prepend drive context to path args if on different drive + // Build full path with drive letter for commands that take paths + char full_path_arg[512] = {0}; + bool is_cd_command = (cmd_strcmp(cmd, "cd") == 0 || cmd_strcmp(cmd, "CD") == 0); + bool is_ls_command = (cmd_strcmp(cmd, "ls") == 0 || cmd_strcmp(cmd, "LS") == 0); + bool is_echo_command = (cmd_strcmp(cmd, "echo") == 0 || cmd_strcmp(cmd, "ECHO") == 0); + + if (cmd_state) { + // Check if this is a command that takes a path argument + bool needs_path = (is_ls_command || + is_cd_command || + cmd_strcmp(cmd, "mkdir") == 0 || cmd_strcmp(cmd, "MKDIR") == 0 || + cmd_strcmp(cmd, "rm") == 0 || cmd_strcmp(cmd, "RM") == 0 || + cmd_strcmp(cmd, "cat") == 0 || cmd_strcmp(cmd, "CAT") == 0 || + is_echo_command || + cmd_strcmp(cmd, "cc") == 0 || cmd_strcmp(cmd, "CC") == 0 || + cmd_strcmp(cmd, "compc") == 0 || cmd_strcmp(cmd, "COMPC") == 0 || + cmd_strcmp(cmd, "touch") == 0 || cmd_strcmp(cmd, "TOUCH") == 0 || + cmd_strcmp(cmd, "cp") == 0 || cmd_strcmp(cmd, "CP") == 0 || + cmd_strcmp(cmd, "mv") == 0 || cmd_strcmp(cmd, "MV") == 0 || + cmd_strcmp(cmd, "txtedit") == 0 || cmd_strcmp(cmd, "TXTEDIT") == 0 || + cmd_strcmp(cmd, "tx") == 0 || cmd_strcmp(cmd, "TX") == 0); + + if (needs_path) { + if (args && args[0]) { + // For echo with redirection, we need to prepend drive to redirect target too + if (is_echo_command) { + // Find > or >> and prepend drive to the filename after it + char temp_args[512] = {0}; + int i = 0; + int j = 0; + bool in_redirect = false; + + while (args[i] && j < 509) { + if (args[i] == '>' && args[i+1] == '>') { + // >> redirection + temp_args[j++] = '>'; + temp_args[j++] = '>'; + i += 2; + while (args[i] == ' ') { temp_args[j++] = ' '; i++; } + + // Prepend drive to filename + if (args[i] && args[i+1] != ':') { + temp_args[j++] = cmd_state->current_drive; + temp_args[j++] = ':'; + } + in_redirect = true; + } else if (args[i] == '>' && args[i+1] != '>') { + // > redirection + temp_args[j++] = '>'; + i++; + while (args[i] == ' ') { temp_args[j++] = ' '; i++; } + + // Prepend drive to filename + if (args[i] && args[i+1] != ':') { + temp_args[j++] = cmd_state->current_drive; + temp_args[j++] = ':'; + } + in_redirect = true; + } else { + temp_args[j++] = args[i++]; + } + } + temp_args[j] = 0; + cmd_strcpy(full_path_arg, temp_args); + args = full_path_arg; + } else if (cmd_strcmp(cmd, "cat") == 0 || cmd_strcmp(cmd, "CAT") == 0 || + cmd_strcmp(cmd, "cc") == 0 || cmd_strcmp(cmd, "CC") == 0 || + cmd_strcmp(cmd, "compc") == 0 || cmd_strcmp(cmd, "COMPC") == 0 || + cmd_strcmp(cmd, "touch") == 0 || cmd_strcmp(cmd, "TOUCH") == 0 || + cmd_strcmp(cmd, "cp") == 0 || cmd_strcmp(cmd, "CP") == 0 || + cmd_strcmp(cmd, "mv") == 0 || cmd_strcmp(cmd, "MV") == 0 || + cmd_strcmp(cmd, "txtedit") == 0 || cmd_strcmp(cmd, "TXTEDIT") == 0 || + cmd_strcmp(cmd, "tx") == 0 || cmd_strcmp(cmd, "TX") == 0) { + // For cat, cc, compc, touch, cp, mv, txtedit: prepend drive to file arguments if not already present + if (args[1] == ':') { + // Already has drive letter + cmd_strcpy(full_path_arg, args); + } else { + // Add drive letter + full_path_arg[0] = cmd_state->current_drive; + full_path_arg[1] = ':'; + int i = 2; + int j = 0; + while (args[j] && i < 509) { + full_path_arg[i++] = args[j++]; + } + full_path_arg[i] = 0; + } + args = full_path_arg; + } else if (is_cd_command) { + // For cd: build full path with drive + current directory + relative path + // Check if args starts with drive letter (e.g., "B:" or "A:") + if (args[1] == ':') { + // Has drive letter, use as-is + cmd_strcpy(full_path_arg, args); + } else if (args[0] == '/') { + // Absolute path, just prepend drive + full_path_arg[0] = cmd_state->current_drive; + full_path_arg[1] = ':'; + int i = 2; + int j = 0; + while (args[j] && i < 509) { + full_path_arg[i++] = args[j++]; + } + full_path_arg[i] = 0; + } else { + // Relative path - need to build from current directory + int i = 0; + full_path_arg[i++] = cmd_state->current_drive; + full_path_arg[i++] = ':'; + + // Add current directory + const char *dir = cmd_state->current_dir; + while (*dir && i < 509) { + full_path_arg[i++] = *dir++; + } + + // Add separator if current dir doesn't end with / + if (i > 2 && full_path_arg[i-1] != '/') { + full_path_arg[i++] = '/'; + } + + // Add the relative path argument + int j = 0; + while (args[j] && i < 509) { + full_path_arg[i++] = args[j++]; + } + full_path_arg[i] = 0; + } + args = full_path_arg; + } else if (args[1] == ':') { + // Already has drive letter + cmd_strcpy(full_path_arg, args); + args = full_path_arg; + } else { + // Add drive letter + full_path_arg[0] = cmd_state->current_drive; + full_path_arg[1] = ':'; + int i = 2; + int j = 0; + while (args[j] && i < 509) { + full_path_arg[i++] = args[j++]; + } + full_path_arg[i] = 0; + args = full_path_arg; + } + } else if (is_ls_command || is_cd_command) { + // For ls and cd with no args, pass current directory with drive + full_path_arg[0] = cmd_state->current_drive; + full_path_arg[1] = ':'; + int i = 2; + const char *dir = cmd_state->current_dir; + while (*dir && i < 509) { + full_path_arg[i++] = *dir++; + } + full_path_arg[i] = 0; + args = full_path_arg; + } + } + } + // Use command dispatch table for (int i = 0; commands[i].name != NULL; i++) { if (cmd_strcmp(cmd, commands[i].name) == 0) { @@ -531,12 +1024,19 @@ static void cmd_exec_single(char *cmd) { // Check for executable in /Apps/ char app_path[256]; - char *p = app_path; + int app_idx = 0; + + // Add drive letter if on different drive + if (cmd_state && cmd_state->current_drive != 'A') { + app_path[app_idx++] = cmd_state->current_drive; + app_path[app_idx++] = ':'; + } + const char *prefix = "/Apps/"; - while (*prefix) *p++ = *prefix++; + while (*prefix) app_path[app_idx++] = *prefix++; char *c = cmd; - while (*c) *p++ = *c++; - *p = 0; + while (*c && app_idx < 255) app_path[app_idx++] = *c++; + app_path[app_idx] = 0; FAT32_FileHandle *app_fh = fat32_open(app_path, "r"); if (app_fh) { @@ -847,7 +1347,7 @@ static void cmd_key(Window *target, char c) { if (c == '\n') { // Enter char cmd_buf[CMD_COLS + 1]; int len = 0; - int prompt_len = cmd_strlen(PROMPT); + int prompt_len = 4; for (int i = prompt_len; i < CMD_COLS; i++) { char ch = screen_buffer[cursor_row][i].c; @@ -864,13 +1364,13 @@ static void cmd_key(Window *target, char c) { cmd_exec(cmd_buf); - cmd_write(PROMPT); + cmd_print_prompt(); } else if (c == 17) { // UP if (history_len > 0) { if (history_pos == -1) { // Save current line int len = 0; - int prompt_len = cmd_strlen(PROMPT); + int prompt_len = 4; for (int i = prompt_len; i < CMD_COLS; i++) { char ch = screen_buffer[cursor_row][i].c; if (ch == 0) break; @@ -900,7 +1400,7 @@ static void cmd_key(Window *target, char c) { } } } else if (c == 19) { // LEFT - if (cursor_col > (int)cmd_strlen(PROMPT)) { + if (cursor_col > 4) { cursor_col--; } } else if (c == 20) { // RIGHT @@ -908,7 +1408,7 @@ static void cmd_key(Window *target, char c) { cursor_col++; } } else if (c == '\b') { // Backspace - if (cursor_col > (int)cmd_strlen(PROMPT)) { + if (cursor_col > 4) { cursor_col--; screen_buffer[cursor_row][cursor_col].c = ' '; } @@ -928,7 +1428,7 @@ void cmd_reset(void) { cmd_write_int(msg_count); cmd_write(" new message(s) run \"msgrc\" to see your new message(s).\n"); } - cmd_write(PROMPT); + cmd_print_prompt(); } static void create_test_files(void) { @@ -1164,6 +1664,16 @@ void cmd_init(void) { win_cmd.handle_click = NULL; win_cmd.handle_right_click = NULL; + // Initialize cmd state (per-window context) + CmdState *state = (CmdState*)kmalloc(sizeof(CmdState)); + if (state) { + state->current_drive = 'A'; + state->current_dir[0] = '/'; + state->current_dir[1] = 0; + win_cmd.data = state; + cmd_state = state; // Set static pointer + } + cmd_reset(); if (!boot_time_init) { diff --git a/src/kernel/disk.h b/src/kernel/disk.h new file mode 100644 index 0000000..ad7ed7f --- /dev/null +++ b/src/kernel/disk.h @@ -0,0 +1,38 @@ +#ifndef DISK_H +#define DISK_H + +#include +#include + +#define SECTOR_SIZE 512 + +typedef enum { + DISK_TYPE_RAM, + DISK_TYPE_IDE, + DISK_TYPE_SATA, + DISK_TYPE_USB +} DiskType; + +typedef struct Disk { + char letter; + DiskType type; + bool is_fat32; + char name[32]; + + // Function pointers for driver operations + int (*read_sector)(struct Disk *disk, uint32_t sector, uint8_t *buffer); + int (*write_sector)(struct Disk *disk, uint32_t sector, const uint8_t *buffer); + + // Private driver data + void *driver_data; +} Disk; + +void disk_manager_init(void); +void disk_manager_scan(void); // Scans for new disks +Disk* disk_get_by_letter(char letter); +char disk_get_next_free_letter(void); +void disk_register(Disk *disk); +int disk_get_count(void); +Disk* disk_get_by_index(int index); + +#endif diff --git a/src/kernel/disk_manager.c b/src/kernel/disk_manager.c new file mode 100644 index 0000000..a32278d --- /dev/null +++ b/src/kernel/disk_manager.c @@ -0,0 +1,301 @@ +#include "disk.h" +#include "pci.h" +#include "memory_manager.h" +#include "io.h" +#include "wm.h" +#include + +#define MAX_DISKS 26 + +static Disk *disks[MAX_DISKS]; +static int disk_count = 0; + +// === ATA Definitions === + +#define ATA_PRIMARY_IO 0x1F0 +#define ATA_PRIMARY_CTRL 0x3F6 +#define ATA_SECONDARY_IO 0x170 +#define ATA_SECONDARY_CTRL 0x376 + +#define ATA_REG_DATA 0x00 +#define ATA_REG_ERROR 0x01 +#define ATA_REG_FEATURES 0x01 +#define ATA_REG_SEC_COUNT0 0x02 +#define ATA_REG_LBA0 0x03 +#define ATA_REG_LBA1 0x04 +#define ATA_REG_LBA2 0x05 +#define ATA_REG_HDDEVSEL 0x06 +#define ATA_REG_COMMAND 0x07 +#define ATA_REG_STATUS 0x07 + +#define ATA_CMD_READ_PIO 0x20 +#define ATA_CMD_WRITE_PIO 0x30 +#define ATA_CMD_IDENTIFY 0xEC + +#define ATA_SR_BSY 0x80 // Busy +#define ATA_SR_DRDY 0x40 // Drive ready +#define ATA_SR_DF 0x20 // Drive write fault +#define ATA_SR_DSC 0x10 // Drive seek complete +#define ATA_SR_DRQ 0x08 // Data request ready +#define ATA_SR_CORR 0x04 // Corrected data +#define ATA_SR_IDX 0x02 // Index +#define ATA_SR_ERR 0x01 // Error + +typedef struct { + uint16_t port_base; + bool slave; +} ATADriverData; + +// === Helpers === + +static void dm_strcpy(char *dest, const char *src) { + while (*src) *dest++ = *src++; + *dest = 0; +} + +void disk_register(Disk *disk); + + +static int ramdisk_read(Disk *disk, uint32_t sector, uint8_t *buffer) { + (void)disk; (void)sector; (void)buffer; + return 0; +} + +static int ramdisk_write(Disk *disk, uint32_t sector, const uint8_t *buffer) { + (void)disk; (void)sector; (void)buffer; + return 0; +} + + +static void ata_wait_bsy(uint16_t port_base) { + while (inb(port_base + ATA_REG_STATUS) & ATA_SR_BSY); +} + +static void ata_wait_drq(uint16_t port_base) { + while (!(inb(port_base + ATA_REG_STATUS) & ATA_SR_DRQ)); +} + +// Returns 1 if drive exists, 0 otherwise +static int ata_identify(uint16_t port_base, bool slave) { + // Select Drive + outb(port_base + ATA_REG_HDDEVSEL, slave ? 0xB0 : 0xA0); + // Zero out sector count and LBA registers + outb(port_base + ATA_REG_SEC_COUNT0, 0); + outb(port_base + ATA_REG_LBA0, 0); + outb(port_base + ATA_REG_LBA1, 0); + outb(port_base + ATA_REG_LBA2, 0); + + // Send Identify command + outb(port_base + ATA_REG_COMMAND, ATA_CMD_IDENTIFY); + + // Check if status is 0 (no drive) + uint8_t status = inb(port_base + ATA_REG_STATUS); + if (status == 0) return 0; + + // Wait until BSY clears + while (inb(port_base + ATA_REG_STATUS) & ATA_SR_BSY) { + // Simple timeout could be added here + status = inb(port_base + ATA_REG_STATUS); + if (status == 0) return 0; // Check again + } + + // Check for error + if (inb(port_base + ATA_REG_STATUS) & ATA_SR_ERR) { + return 0; // Error, likely not ATA + } + + // Wait for DRQ or ERR + while (!(inb(port_base + ATA_REG_STATUS) & (ATA_SR_DRQ | ATA_SR_ERR))); + + if (inb(port_base + ATA_REG_STATUS) & ATA_SR_ERR) return 0; + + // Read 256 words (512 bytes) of identity data + for (int i = 0; i < 256; i++) { + uint16_t data = inw(port_base + ATA_REG_DATA); + (void)data; // We discard identity data for now, just checking presence + } + + return 1; +} + +static int ata_read_sector(Disk *disk, uint32_t lba, uint8_t *buffer) { + ATADriverData *data = (ATADriverData*)disk->driver_data; + uint16_t port_base = data->port_base; + bool slave = data->slave; + + ata_wait_bsy(port_base); + + // Select drive and send highest 4 bits of LBA + outb(port_base + ATA_REG_HDDEVSEL, 0xE0 | (slave << 4) | ((lba >> 24) & 0x0F)); + outb(port_base + ATA_REG_FEATURES, 0x00); + outb(port_base + ATA_REG_SEC_COUNT0, 1); + outb(port_base + ATA_REG_LBA0, (uint8_t)(lba)); + outb(port_base + ATA_REG_LBA1, (uint8_t)(lba >> 8)); + outb(port_base + ATA_REG_LBA2, (uint8_t)(lba >> 16)); + outb(port_base + ATA_REG_COMMAND, ATA_CMD_READ_PIO); + + ata_wait_bsy(port_base); + ata_wait_drq(port_base); + + uint16_t *ptr = (uint16_t*)buffer; + for (int i = 0; i < 256; i++) { + ptr[i] = inw(port_base + ATA_REG_DATA); + } + + return 0; // Success +} + +static int ata_write_sector(Disk *disk, uint32_t lba, const uint8_t *buffer) { + ATADriverData *data = (ATADriverData*)disk->driver_data; + uint16_t port_base = data->port_base; + bool slave = data->slave; + + ata_wait_bsy(port_base); + + outb(port_base + ATA_REG_HDDEVSEL, 0xE0 | (slave << 4) | ((lba >> 24) & 0x0F)); + outb(port_base + ATA_REG_FEATURES, 0x00); + outb(port_base + ATA_REG_SEC_COUNT0, 1); + outb(port_base + ATA_REG_LBA0, (uint8_t)(lba)); + outb(port_base + ATA_REG_LBA1, (uint8_t)(lba >> 8)); + outb(port_base + ATA_REG_LBA2, (uint8_t)(lba >> 16)); + outb(port_base + ATA_REG_COMMAND, ATA_CMD_WRITE_PIO); + + ata_wait_bsy(port_base); + ata_wait_drq(port_base); + + const uint16_t *ptr = (const uint16_t*)buffer; + for (int i = 0; i < 256; i++) { + outw(port_base + ATA_REG_DATA, ptr[i]); + } + + // Flush / Sync + outb(port_base + ATA_REG_COMMAND, 0xE7); // Cache Flush + ata_wait_bsy(port_base); + + return 0; +} + + +char disk_get_next_free_letter(void) { + for (int i = 0; i < MAX_DISKS; i++) { + char letter = 'A' + i; + bool used = false; + for (int j = 0; j < disk_count; j++) { + if (disks[j]->letter == letter) { + used = true; + break; + } + } + if (!used) return letter; + } + return 0; // No free letters +} + +void disk_register(Disk *disk) { + if (disk_count >= MAX_DISKS) return; + + // Ensure letter is unique + if (disk->letter == 0) { + disk->letter = disk_get_next_free_letter(); + } + + disks[disk_count++] = disk; +} + +void disk_manager_init(void) { + for (int i = 0; i < MAX_DISKS; i++) { + disks[i] = NULL; + } + disk_count = 0; + + // Register A: (Ramdisk) + Disk *ramdisk = (Disk*)kmalloc(sizeof(Disk)); + ramdisk->letter = 'A'; + ramdisk->type = DISK_TYPE_RAM; + ramdisk->is_fat32 = true; // Ramdisk is always formatted + dm_strcpy(ramdisk->name, "RAM"); + ramdisk->read_sector = ramdisk_read; + ramdisk->write_sector = ramdisk_write; + ramdisk->driver_data = NULL; + + disk_register(ramdisk); +} + +Disk* disk_get_by_letter(char letter) { + // Uppercase + if (letter >= 'a' && letter <= 'z') letter -= 32; + + for (int i = 0; i < disk_count; i++) { + if (disks[i]->letter == letter) { + return disks[i]; + } + } + return NULL; +} + +int disk_get_count(void) { + return disk_count; +} + +Disk* disk_get_by_index(int index) { + if (index < 0 || index >= disk_count) return NULL; + return disks[index]; +} + + +// Check for FAT32 Signature in MBR/VBR +static bool check_fat32_signature(Disk *disk) { + uint8_t *buffer = (uint8_t*)kmalloc(512); + if (!buffer) return false; + + // Read Sector 0 + if (disk->read_sector(disk, 0, buffer) != 0) { + kfree(buffer); + return false; + } + + // Check boot signature 0x55 0xAA at offset 510 + if (buffer[510] != 0x55 || buffer[511] != 0xAA) { + kfree(buffer); + return false; + } + + kfree(buffer); + return true; +} + +static void try_add_ata_drive(uint16_t port, bool slave, const char *name) { + if (ata_identify(port, slave)) { + Disk *new_disk = (Disk*)kmalloc(sizeof(Disk)); + if (!new_disk) return; + + ATADriverData *data = (ATADriverData*)kmalloc(sizeof(ATADriverData)); + data->port_base = port; + data->slave = slave; + + new_disk->letter = 0; // Auto-assign + new_disk->type = DISK_TYPE_IDE; + dm_strcpy(new_disk->name, name); + new_disk->read_sector = ata_read_sector; + new_disk->write_sector = ata_write_sector; + new_disk->driver_data = data; + + // Check filesystem + if (check_fat32_signature(new_disk)) { + new_disk->is_fat32 = true; + disk_register(new_disk); + } else { + + kfree(data); + kfree(new_disk); + } + } +} + +void disk_manager_scan(void) { + // Probe Standard ATA Ports + try_add_ata_drive(ATA_PRIMARY_IO, false, "IDE1"); + try_add_ata_drive(ATA_PRIMARY_IO, true, "IDE2"); + try_add_ata_drive(ATA_SECONDARY_IO, false, "IDE3"); + try_add_ata_drive(ATA_SECONDARY_IO, true, "IDE4"); +} \ No newline at end of file diff --git a/src/kernel/editor.c b/src/kernel/editor.c index 8e4c5ac..6689ec9 100644 --- a/src/kernel/editor.c +++ b/src/kernel/editor.c @@ -5,7 +5,6 @@ #include #include -// === Text Editor State === Window win_editor; #define EDITOR_MAX_LINES 128 @@ -192,13 +191,13 @@ static void editor_insert_char(char ch) { EditorLine *prev = &lines[cursor_line - 1]; int merge_point = prev->length; - for (int i = 0; i < line->length; i++) { - if (merge_point + i < EDITOR_MAX_LINE_LEN - 1) { - prev->content[merge_point + i] = line->content[i]; - } + int i = 0; + while (i < line->length && (merge_point + i) < EDITOR_MAX_LINE_LEN - 1) { + prev->content[merge_point + i] = line->content[i]; + i++; } - prev->content[merge_point + line->length] = 0; - prev->length = merge_point + line->length; + prev->content[merge_point + i] = 0; + prev->length = merge_point + i; // Shift lines up for (int i = cursor_line; i < line_count - 1; i++) { @@ -419,13 +418,6 @@ static void editor_paint(Window *win) { // === Key Handler === static void editor_handle_key(Window *win, char c) { - if (c == 'q' || c == 'Q') { - if (file_modified) { - } - win->visible = false; - return; - } - // Arrow keys - UP if (c == 17) { if (cursor_line > 0) { diff --git a/src/kernel/explorer.c b/src/kernel/explorer.c index 71c2d0c..d1f5816 100644 --- a/src/kernel/explorer.c +++ b/src/kernel/explorer.c @@ -1,6 +1,7 @@ #include "explorer.h" #include "graphics.h" #include "fat32.h" +#include "disk.h" #include "wm.h" #include "memory_manager.h" #include "editor.h" @@ -377,8 +378,15 @@ bool explorer_delete_recursive(const char *path) { for (int k = i + 1; k < len; k++) filename[j++] = path[k]; filename[j] = 0; + // Extract drive from path + char drive_prefix[3] = "A:"; + if (path[0] && path[1] == ':') { + drive_prefix[0] = path[0]; + } + char dest_path[256]; - explorer_strcpy(dest_path, "/RecycleBin/"); + explorer_strcpy(dest_path, drive_prefix); + explorer_strcat(dest_path, "/RecycleBin/"); explorer_strcat(dest_path, filename); // Save origin @@ -946,11 +954,36 @@ static void explorer_paint(Window *win) { // Fill background draw_rect(offset_x, offset_y, win->w - 8, win->h - 28, COLOR_LTGRAY); - // Draw path bar + // Draw Drive Button + char drive_label[8]; + // Extract drive from the window's current_path instead of using global current_drive + char current_drv = 'A'; + if (state->current_path[0] && state->current_path[1] == ':') { + current_drv = state->current_path[0]; + } else if (state->current_path[0] && (state->current_path[0] >= 'A' && state->current_path[0] <= 'Z')) { + current_drv = state->current_path[0]; + } + + drive_label[0] = '['; + drive_label[1] = ' '; + drive_label[2] = current_drv; + drive_label[3] = ':'; + drive_label[4] = ' '; + drive_label[5] = 'v'; + drive_label[6] = ' '; + drive_label[7] = ']'; + + // Button at x+4, y+4, w=60 + draw_button(win->x + 4, offset_y + 4, 60, 30, "", false); + draw_string(win->x + 12, offset_y + 12, drive_label, COLOR_BLACK); + + // Draw path bar (shifted right) int path_height = 30; - draw_bevel_rect(offset_x + 4, offset_y + 4, win->w - 16, path_height, true); - draw_string(offset_x + 10, offset_y + 10, "Path", COLOR_BLACK); - draw_string(offset_x + 50, offset_y + 10, state->current_path, COLOR_BLACK); + int path_x = offset_x + 64; + int path_w = win->w - 16 - 64; + draw_bevel_rect(path_x, offset_y + 4, path_w, path_height, true); + draw_string(path_x + 6, offset_y + 10, "Path", COLOR_BLACK); + draw_string(path_x + 46, offset_y + 10, state->current_path, COLOR_BLACK); // Draw dropdown menu button (right-aligned, before back button) int dropdown_btn_x = win->x + win->w - 90; @@ -1004,6 +1037,39 @@ static void explorer_paint(Window *win) { graphics_clear_clipping(); } + // Draw Drive Menu if visible + if (state->drive_menu_visible) { + int menu_x = win->x + 4; + int menu_y = offset_y + 34; + int menu_w = 80; + int count = disk_get_count(); + int menu_h = count * 25; + + draw_rect(menu_x, menu_y, menu_w, menu_h, COLOR_LTGRAY); + draw_bevel_rect(menu_x, menu_y, menu_w, menu_h, true); + + for (int i = 0; i < count; i++) { + Disk *d = disk_get_by_index(i); + if (d) { + char buf[16]; + buf[0] = d->letter; + buf[1] = ':'; + buf[2] = ' '; + // Copy name truncated + int n = 0; while(d->name[n] && n < 10) { buf[3+n] = d->name[n]; n++; } + buf[3+n] = 0; + + // Highlight current + if (d->letter == current_drv) { + draw_rect(menu_x + 2, menu_y + i*25 + 2, menu_w - 4, 21, COLOR_BLUE); + draw_string(menu_x + 5, menu_y + i*25 + 6, buf, COLOR_WHITE); + } else { + draw_string(menu_x + 5, menu_y + i*25 + 6, buf, COLOR_BLACK); + } + } + } + } + // Draw dropdown menu if visible if (state->dropdown_menu_visible) { int menu_x = dropdown_btn_x; @@ -1323,6 +1389,35 @@ static void explorer_handle_click(Window *win, int x, int y) { } } + // Handle Drive Menu Selection + if (state->drive_menu_visible) { + int menu_x = 4; // Window relative + int menu_y = 58; // 24+34 + int menu_w = 80; + int count = disk_get_count(); + int menu_h = count * 25; + + if (x >= menu_x && x < menu_x + menu_w && y >= menu_y && y < menu_y + menu_h) { + int idx = (y - menu_y) / 25; + Disk *d = disk_get_by_index(idx); + if (d) { + // Do not change global drive, just navigate explorer to it + char path[4]; + path[0] = d->letter; + path[1] = ':'; + path[2] = '/'; + path[3] = 0; + explorer_load_directory(win, path); + } + state->drive_menu_visible = false; + return; + } + + // Click outside closes menu + state->drive_menu_visible = false; + return; + } + // Handle dropdown menu clicks if (state->dropdown_menu_visible) { int dropdown_btn_x = win->w - 90; // Window-relative @@ -1362,12 +1457,21 @@ static void explorer_handle_click(Window *win, int x, int y) { } // x, y are already relative to window (0,0 is top-left of window content area) + + // Check Drive Button + int button_y = 28; + if (x >= 4 && x < 64 && y >= button_y && y < button_y + 30) { + state->drive_menu_visible = !state->drive_menu_visible; + state->dropdown_menu_visible = false; // Close other menu + return; + } + // Check dropdown menu button - int button_y = 28; // Position from top of window title bar if (x >= win->w - 90 && x < win->w - 55 && y >= button_y && y < button_y + 30) { // Dropdown menu button clicked dropdown_menu_toggle(win); + state->drive_menu_visible = false; // Close other menu return; } @@ -1514,10 +1618,7 @@ static void explorer_handle_key(Window *win, char c) { return; } - if (c == 'q' || c == 'Q') { - win->visible = false; - return; - } + // Close dropdown menu if open with ESC if (state->dropdown_menu_visible && c == 27) { @@ -1899,12 +2000,15 @@ Window* explorer_create_window(const char *path) { state->explorer_scroll_row = 0; state->dialog_state = DIALOG_NONE; state->dropdown_menu_visible = false; + state->drive_menu_visible = false; state->file_context_menu_visible = false; explorer_wins[explorer_win_count++] = win; wm_add_window(win); wm_bring_to_front(win); - explorer_load_directory(win, path); + + if (explorer_strcmp(path, "/") == 0) explorer_load_directory(win, "A:/"); + else explorer_load_directory(win, path); return win; } @@ -1924,13 +2028,14 @@ void explorer_init(void) { win_explorer.handle_right_click = explorer_handle_right_click; win_explorer.data = state; + state->drive_menu_visible = false; explorer_wins[explorer_win_count++] = &win_explorer; - explorer_load_directory(&win_explorer, "/"); + explorer_load_directory(&win_explorer, "A:/"); } void explorer_reset(void) { ExplorerState *state = (ExplorerState*)win_explorer.data; // Reset explorer to root directory on close/reopen - explorer_load_directory(&win_explorer, "/"); + explorer_load_directory(&win_explorer, "A:/"); win_explorer.focused = false; state->explorer_scroll_row = 0; } \ No newline at end of file diff --git a/src/kernel/explorer.h b/src/kernel/explorer.h index f2e1994..4dc70fe 100644 --- a/src/kernel/explorer.h +++ b/src/kernel/explorer.h @@ -43,6 +43,7 @@ typedef struct { // Dropdown menu state bool dropdown_menu_visible; + bool drive_menu_visible; // File context menu state bool file_context_menu_visible; diff --git a/src/kernel/fat32.c b/src/kernel/fat32.c index bfe6d34..a70bd01 100644 --- a/src/kernel/fat32.c +++ b/src/kernel/fat32.c @@ -1,12 +1,12 @@ #include "fat32.h" #include "memory_manager.h" #include "io.h" +#include "disk.h" #include #include -// === Memory-based FAT32 Implementation === -// This is a simplified FAT32 for the OS kernel -// It allocates everything in RAM instead of using a real disk +// === RAMFS Implementation (Drive A:) === +// We keep the original logic for Drive A to preserve existing OS functionality. #define MAX_FILES 256 #define MAX_CLUSTERS 1024 @@ -31,9 +31,25 @@ static FileEntry files[MAX_FILES]; static uint32_t next_cluster = 3; // Start after reserved clusters 0, 1, 2 static FAT32_FileHandle open_handles[MAX_OPEN_HANDLES]; static char current_dir[FAT32_MAX_PATH] = "/"; +static char current_drive = 'A'; static int desktop_file_limit = -1; -// === Helper Functions === +// === RealFS Definitions === + +typedef struct { + Disk *disk; + uint32_t fat_begin_lba; + uint32_t cluster_begin_lba; + uint32_t sectors_per_cluster; + uint32_t root_cluster; + uint32_t fat_size; // sectors + uint32_t total_sectors; + bool mounted; +} FAT32_Volume; + +static FAT32_Volume volumes[26]; // A-Z + +// === Helper Functions (Shared) === static size_t fs_strlen(const char *str) { size_t len = 0; @@ -77,16 +93,10 @@ static bool fs_starts_with(const char *str, const char *prefix) { static void extract_filename(const char *path, char *filename) { int len = fs_strlen(path); int i = len - 1; - - // Skip trailing slashes while (i > 0 && path[i] == '/') i--; - - // Find last slash int start = i; while (start >= 0 && path[start] != '/') start--; start++; - - // Copy filename int j = 0; for (int k = start; k <= i; k++) { filename[j++] = path[k]; @@ -98,13 +108,8 @@ static void extract_filename(const char *path, char *filename) { static void extract_parent_path(const char *path, char *parent) { int len = fs_strlen(path); int i = len - 1; - - // Skip trailing slashes while (i > 0 && path[i] == '/') i--; - - // Find last slash while (i > 0 && path[i] != '/') i--; - if (i == 0) { parent[0] = '/'; parent[1] = 0; @@ -116,53 +121,66 @@ static void extract_parent_path(const char *path, char *parent) { } } +// Helper to parse drive from path +static char parse_drive_from_path(const char **path_ptr) { + const char *path = *path_ptr; + if (path[0] && path[1] == ':') { + char drive = path[0]; + if (drive >= 'a' && drive <= 'z') drive -= 32; // toupper + *path_ptr = path + 2; + return drive; + } + return current_drive; +} + // Normalize path (remove .., ., etc) void fat32_normalize_path(const char *path, char *normalized) { - uint64_t rflags; - asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - + // Basic normalization + // If we have a drive letter, strip it for internal processing logic if needed, + // but the output 'normalized' should conceptually be the path *on that drive*. + char temp[FAT32_MAX_PATH]; int temp_len = 0; - + const char *p = path; + char drive = parse_drive_from_path(&p); + // Initialize with current directory or root - if (path[0] == '/') { + // If drive changed, we assume root of that drive + if (p[0] == '/') { temp[0] = '/'; temp[1] = 0; temp_len = 1; } else { - fs_strcpy(temp, current_dir); - temp_len = fs_strlen(temp); + if (drive != current_drive) { + temp[0] = '/'; + temp[1] = 0; + temp_len = 1; + } else { + fs_strcpy(temp, current_dir); + temp_len = fs_strlen(temp); + } } int i = 0; - while (path[i]) { - // Skip separators - while (path[i] == '/') i++; - if (!path[i]) break; - - // Extract component + while (p[i]) { + while (p[i] == '/') i++; + if (!p[i]) break; char component[256]; int j = 0; - while (path[i] && path[i] != '/' && j < 255) { - component[j++] = path[i++]; + while (p[i] && p[i] != '/' && j < 255) { + component[j++] = p[i++]; } component[j] = 0; if (fs_strcmp(component, ".") == 0) { continue; } else if (fs_strcmp(component, "..") == 0) { - // Go up one level - if (temp_len > 1) { // Not root - while (temp_len > 0 && temp[temp_len - 1] != '/') { - temp_len--; - } - if (temp_len > 1) { // Remove trailing slash if not root - temp_len--; - } + if (temp_len > 1) { + while (temp_len > 0 && temp[temp_len - 1] != '/') temp_len--; + if (temp_len > 1) temp_len--; temp[temp_len] = 0; } } else { - // Append component if (temp[temp_len - 1] != '/') { temp[temp_len++] = '/'; temp[temp_len] = 0; @@ -171,21 +189,15 @@ void fat32_normalize_path(const char *path, char *normalized) { temp_len = fs_strlen(temp); } } - - // Remove trailing slashes (except for root) - if (temp_len > 1 && temp[temp_len - 1] == '/') { - temp[--temp_len] = 0; - } - + if (temp_len > 1 && temp[temp_len - 1] == '/') temp[--temp_len] = 0; fs_strcpy(normalized, temp); - asm volatile("push %0; popfq" : : "r"(rflags)); } -// Find file entry by path -static FileEntry* find_file(const char *path) { +// === RAMFS Internal Functions === + +static FileEntry* ramfs_find_file(const char *path) { char normalized[FAT32_MAX_PATH]; fat32_normalize_path(path, normalized); - for (int i = 0; i < MAX_FILES; i++) { if (files[i].used && fs_strcmp(files[i].full_path, normalized) == 0) { return &files[i]; @@ -194,55 +206,40 @@ static FileEntry* find_file(const char *path) { return NULL; } -// Find first unused file entry -static FileEntry* find_free_entry(void) { +static FileEntry* ramfs_find_free_entry(void) { for (int i = 0; i < MAX_FILES; i++) { - if (!files[i].used) { - return &files[i]; - } + if (!files[i].used) return &files[i]; } return NULL; } -// Find free handle -static FAT32_FileHandle* find_free_handle(void) { +static FAT32_FileHandle* ramfs_find_free_handle(void) { for (int i = 0; i < MAX_OPEN_HANDLES; i++) { - if (!open_handles[i].valid) { - return &open_handles[i]; - } + if (!open_handles[i].valid) return &open_handles[i]; } return NULL; } -// Allocate cluster -static uint32_t allocate_cluster(void) { +static uint32_t ramfs_allocate_cluster(void) { if (next_cluster >= MAX_CLUSTERS) return 0; uint32_t cluster = next_cluster++; - fat_table[cluster] = 0xFFFFFFFF; // End of chain + fat_table[cluster] = 0xFFFFFFFF; return cluster; } -// Check desktop limit static bool check_desktop_limit(const char *normalized_path) { if (desktop_file_limit < 0) return true; - - // Check if path is directly in /Desktop (not subfolder) - // Path should start with /Desktop/ and have no other slashes if (fs_strlen(normalized_path) > 9 && normalized_path[0] == '/' && normalized_path[1] == 'D' && normalized_path[2] == 'e' && normalized_path[3] == 's' && normalized_path[4] == 'k' && normalized_path[5] == 't' && normalized_path[6] == 'o' && normalized_path[7] == 'p' && normalized_path[8] == '/') { - - // Check for subfolders const char *p = normalized_path + 9; while (*p) { - if (*p == '/') return true; // Subfolder, allow + if (*p == '/') return true; p++; } - - // Count files in /Desktop FAT32_FileInfo *info = (FAT32_FileInfo*)kmalloc(256 * sizeof(FAT32_FileInfo)); if (!info) return true; int count = fat32_list_directory("/Desktop", info, 256); @@ -252,106 +249,43 @@ static bool check_desktop_limit(const char *normalized_path) { return true; } -// === Public API === - -void fat32_init(void) { - // Initialize FAT table - for (int i = 0; i < MAX_CLUSTERS; i++) { - fat_table[i] = 0; - } - fat_table[0] = 0xFFFFFFF8; // Media descriptor - fat_table[1] = 0xFFFFFFFF; // Bad sector marker - - // Create root directory entry - FileEntry *root = find_free_entry(); - if (root) { - root->used = true; - root->filename[0] = 0; - fs_strcpy(root->full_path, "/"); - root->start_cluster = 2; // Root cluster - root->size = 0; - root->attributes = ATTR_DIRECTORY; - fat_table[2] = 0xFFFFFFFF; // Root is EOF - } - - next_cluster = 3; - current_dir[0] = '/'; - current_dir[1] = 0; -} - -void fat32_set_desktop_limit(int limit) { - desktop_file_limit = limit; -} - -FAT32_FileHandle* fat32_open(const char *path, const char *mode) { - uint64_t rflags; - asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - - char normalized[FAT32_MAX_PATH]; - fat32_normalize_path(path, normalized); - - FileEntry *entry = find_file(normalized); +static FAT32_FileHandle* ramfs_open(const char *normalized_path, const char *mode) { + FileEntry *entry = ramfs_find_file(normalized_path); if (mode[0] == 'r') { - // Read mode - if (!entry || (entry->attributes & ATTR_DIRECTORY)) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return NULL; // File not found or is directory - } + if (!entry || (entry->attributes & ATTR_DIRECTORY)) return NULL; } else if (mode[0] == 'w' || (mode[0] == 'a')) { - // Write/append mode - create if not exists if (!entry) { - if (!check_desktop_limit(normalized)) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return NULL; - } - - entry = find_free_entry(); - if (!entry) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return NULL; - } - + if (!check_desktop_limit(normalized_path)) return NULL; + entry = ramfs_find_free_entry(); + if (!entry) return NULL; entry->used = true; - fs_strcpy(entry->full_path, normalized); - extract_filename(normalized, entry->filename); - extract_parent_path(normalized, entry->parent_path); - entry->start_cluster = allocate_cluster(); - if (!entry->start_cluster) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return NULL; - } + fs_strcpy(entry->full_path, normalized_path); + extract_filename(normalized_path, entry->filename); + extract_parent_path(normalized_path, entry->parent_path); + entry->start_cluster = ramfs_allocate_cluster(); + if (!entry->start_cluster) return NULL; entry->size = 0; - entry->attributes = 0; // Regular file - } - - if (mode[0] == 'w') { - entry->size = 0; // Truncate + entry->attributes = 0; } + if (mode[0] == 'w') entry->size = 0; } - // Find free handle - FAT32_FileHandle *handle = find_free_handle(); - if (!handle) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return NULL; - } + FAT32_FileHandle *handle = ramfs_find_free_handle(); + if (!handle) return NULL; handle->valid = true; + handle->drive = 'A'; handle->cluster = entry->start_cluster; handle->start_cluster = entry->start_cluster; handle->position = 0; handle->size = entry->size; - if (mode[0] == 'r') { - handle->mode = 0; - } else if (mode[0] == 'w') { - handle->mode = 1; - } else { - handle->mode = 2; // append + if (mode[0] == 'r') handle->mode = 0; + else if (mode[0] == 'w') handle->mode = 1; + else { + handle->mode = 2; handle->position = entry->size; - - // Walk to the correct cluster for the current position uint32_t current_cluster = handle->start_cluster; uint32_t pos = 0; while (pos + FAT32_CLUSTER_SIZE <= handle->position) { @@ -362,6 +296,875 @@ FAT32_FileHandle* fat32_open(const char *path, const char *mode) { } handle->cluster = current_cluster; } + return handle; +} + +static int ramfs_read(FAT32_FileHandle *handle, void *buffer, int size) { + int bytes_read = 0; + uint8_t *buf = (uint8_t *)buffer; + + while (bytes_read < size && handle->position < handle->size) { + uint32_t offset_in_cluster = handle->position % FAT32_CLUSTER_SIZE; + int to_read = size - bytes_read; + int available = handle->size - handle->position; + if (to_read > available) to_read = available; + if (to_read > FAT32_CLUSTER_SIZE - offset_in_cluster) to_read = FAT32_CLUSTER_SIZE - offset_in_cluster; + + if (handle->cluster >= MAX_CLUSTERS) break; + + uint8_t *src = cluster_data[handle->cluster] + offset_in_cluster; + for (int i = 0; i < to_read; i++) buf[bytes_read + i] = src[i]; + + bytes_read += to_read; + handle->position += to_read; + if (handle->position % FAT32_CLUSTER_SIZE == 0 && handle->position < handle->size) { + handle->cluster = fat_table[handle->cluster]; + } + } + return bytes_read; +} + +static int ramfs_write(FAT32_FileHandle *handle, const void *buffer, int size) { + int bytes_written = 0; + const uint8_t *buf = (const uint8_t *)buffer; + + if (handle->position > 0 && (handle->position % FAT32_CLUSTER_SIZE) == 0) { + uint32_t next = fat_table[handle->cluster]; + if (next >= 0xFFFFFFF8) { + next = ramfs_allocate_cluster(); + if (!next) return 0; + fat_table[handle->cluster] = next; + } + handle->cluster = next; + } + + while (bytes_written < size) { + uint32_t offset_in_cluster = handle->position % FAT32_CLUSTER_SIZE; + int to_write = size - bytes_written; + if (to_write > FAT32_CLUSTER_SIZE - offset_in_cluster) to_write = FAT32_CLUSTER_SIZE - offset_in_cluster; + + if (handle->cluster >= MAX_CLUSTERS) break; + + uint8_t *dest = cluster_data[handle->cluster] + offset_in_cluster; + for (int i = 0; i < to_write; i++) dest[i] = buf[bytes_written + i]; + + bytes_written += to_write; + handle->position += to_write; + if (handle->position > handle->size) handle->size = handle->position; + + if (offset_in_cluster + to_write >= FAT32_CLUSTER_SIZE && bytes_written < size) { + uint32_t next = ramfs_allocate_cluster(); + if (!next) break; + fat_table[handle->cluster] = next; + handle->cluster = next; + } + } + + for (int i = 0; i < MAX_FILES; i++) { + if (files[i].used && files[i].start_cluster == handle->start_cluster) { + files[i].size = handle->size; + break; + } + } + return bytes_written; +} + +// === RealFS Implementation === + +static bool realfs_mount(char drive) { + int idx = drive - 'A'; + if (idx < 0 || idx >= 26) return false; + + if (volumes[idx].mounted) return true; + + Disk *disk = disk_get_by_letter(drive); + if (!disk) return false; + + uint8_t *sect0 = (uint8_t*)kmalloc(512); + if (!sect0) return false; + + if (disk->read_sector(disk, 0, sect0) != 0) { + kfree(sect0); + return false; + } + + FAT32_BootSector *bpb = (FAT32_BootSector*)sect0; + + // Simple verification (could be more robust) + if (bpb->boot_signature_value != 0xAA55) { + kfree(sect0); + return false; + } + + volumes[idx].disk = disk; + volumes[idx].fat_begin_lba = bpb->reserved_sectors; + volumes[idx].cluster_begin_lba = bpb->reserved_sectors + (bpb->num_fats * bpb->sectors_per_fat_32); + volumes[idx].sectors_per_cluster = bpb->sectors_per_cluster; + volumes[idx].root_cluster = bpb->root_cluster; + volumes[idx].fat_size = bpb->sectors_per_fat_32; + volumes[idx].total_sectors = bpb->total_sectors_32; + volumes[idx].mounted = true; + + kfree(sect0); + return true; +} + +static uint32_t realfs_next_cluster(FAT32_Volume *vol, uint32_t cluster); +static void realfs_update_dir_entry_size(FAT32_Volume *vol, FAT32_FileHandle *handle) { + if (handle->dir_sector != 0 && handle->dir_offset != 0xFFFFFFFF && handle->dir_offset < 512) { + uint8_t *dir_buf = (uint8_t*)kmalloc(512); + if (dir_buf && vol->disk->read_sector(vol->disk, handle->dir_sector, dir_buf) == 0) { + FAT32_DirEntry *entry = (FAT32_DirEntry*)(dir_buf + handle->dir_offset); + // Update start cluster if it exists + if (handle->start_cluster != 0) { + entry->start_cluster_high = (handle->start_cluster >> 16); + entry->start_cluster_low = (handle->start_cluster & 0xFFFF); + } + // Always update file size + entry->file_size = handle->size; + // Write back + vol->disk->write_sector(vol->disk, handle->dir_sector, dir_buf); + } + if (dir_buf) kfree(dir_buf); + } +} + +static uint32_t realfs_next_cluster(FAT32_Volume *vol, uint32_t cluster) { + uint32_t fat_sector = vol->fat_begin_lba + (cluster * 4) / 512; + uint32_t fat_offset = (cluster * 4) % 512; + + uint8_t *buf = (uint8_t*)kmalloc(512); + if (!buf) return 0xFFFFFFFF; + + if (vol->disk->read_sector(vol->disk, fat_sector, buf) != 0) { + kfree(buf); + return 0xFFFFFFFF; + } + + uint32_t next = *(uint32_t*)&buf[fat_offset]; + next &= 0x0FFFFFFF; // Mask top 4 bits + + kfree(buf); + return next; +} + +static int realfs_read_cluster(FAT32_Volume *vol, uint32_t cluster, uint8_t *buffer) { + uint32_t lba = vol->cluster_begin_lba + (cluster - 2) * vol->sectors_per_cluster; + for (uint32_t i = 0; i < vol->sectors_per_cluster; i++) { + if (vol->disk->read_sector(vol->disk, lba + i, buffer + (i * 512)) != 0) return -1; + } + return 0; +} + +static void to_dos_filename(const char *filename, char *out) { + for (int i = 0; i < 11; i++) out[i] = ' '; + int len = fs_strlen(filename); + int dot = -1; + for (int i = len - 1; i >= 0; i--) { + if (filename[i] == '.') { dot = i; break; } + } + int name_len = (dot == -1) ? len : dot; + if (name_len > 8) name_len = 8; + for (int i = 0; i < name_len; i++) { + char c = filename[i]; + // Preserve case - don't convert to uppercase + out[i] = c; + } + if (dot != -1) { + int ext_len = len - dot - 1; + if (ext_len > 3) ext_len = 3; + for (int i = 0; i < ext_len; i++) { + char c = filename[dot + 1 + i]; + // Preserve case - don't convert to uppercase + out[8 + i] = c; + } + } +} + +static FAT32_FileHandle* realfs_open(char drive, const char *path, const char *mode) { + int vol_idx = drive - 'A'; + if (!volumes[vol_idx].mounted) { + if (!realfs_mount(drive)) return NULL; + } + FAT32_Volume *vol = &volumes[vol_idx]; + + // Parse path to find start cluster + uint32_t current_cluster = vol->root_cluster; + + // Skip leading slash + const char *p = path; + if (*p == '/') p++; + + if (*p == 0) { + // Root dir + if (mode[0] == 'w') return NULL; // Cannot write to root as file + FAT32_FileHandle *fh = ramfs_find_free_handle(); // Reuse handle pool + if (fh) { + fh->valid = true; + fh->drive = drive; + fh->start_cluster = vol->root_cluster; + fh->cluster = vol->root_cluster; + fh->position = 0; + fh->size = 0; // Unknown for root + fh->mode = 0; + return fh; + } + return NULL; + } + + char component[256]; + bool found = false; + uint32_t file_size = 0; + + uint32_t entry_sector = 0; + uint32_t entry_offset = 0; + + while (*p) { + // Extract component + int i = 0; + while (*p && *p != '/') { + component[i++] = *p++; + } + component[i] = 0; + if (*p == '/') p++; // Skip separator + + // Search in current_cluster + found = false; + uint32_t search_cluster = current_cluster; + uint8_t *cluster_buf = (uint8_t*)kmalloc(vol->sectors_per_cluster * 512); + + while (search_cluster < 0x0FFFFFF8) { + if (realfs_read_cluster(vol, search_cluster, cluster_buf) != 0) break; + + FAT32_DirEntry *entry = (FAT32_DirEntry*)cluster_buf; + int entries_per_cluster = (vol->sectors_per_cluster * 512) / 32; + + for (int e = 0; e < entries_per_cluster; e++) { + if (entry[e].filename[0] == 0) break; // End of dir + if (entry[e].filename[0] == 0xE5) continue; // Deleted + + // Compare name (simplistic 8.3 matching) + char name[12]; + int n = 0; + for (int k = 0; k < 8 && entry[e].filename[k] != ' '; k++) name[n++] = entry[e].filename[k]; + if (entry[e].extension[0] != ' ') { + name[n++] = '.'; + for (int k = 0; k < 3 && entry[e].extension[k] != ' '; k++) name[n++] = entry[e].extension[k]; + } + name[n] = 0; + + // Case insensitive compare + bool match = true; + for (int c = 0; c < n+1; c++) { + char c1 = name[c]; + char c2 = component[c]; + if (c1 >= 'a' && c1 <= 'z') c1 -= 32; + if (c2 >= 'a' && c2 <= 'z') c2 -= 32; + if (c1 != c2) { match = false; break; } + } + + if (match) { + uint32_t cluster = (entry[e].start_cluster_high << 16) | entry[e].start_cluster_low; + + uint32_t lba = vol->cluster_begin_lba + (search_cluster - 2) * vol->sectors_per_cluster; + int sect_in_cluster = (e * 32) / 512; + entry_sector = lba + sect_in_cluster; + entry_offset = (e * 32) % 512; + + if (*p == 0) { + // Found target + current_cluster = cluster; + file_size = entry[e].file_size; + found = true; + } else { + // It must be a directory + if (entry[e].attributes & ATTR_DIRECTORY) { + current_cluster = cluster; + found = true; + } + } + break; + } + } + if (found) break; + search_cluster = realfs_next_cluster(vol, search_cluster); + } + + if (!found) { + // Check if we want to create file + if ((mode[0] == 'w' || mode[0] == 'a') && *p == 0) { + // Create file logic + char dos_name[11]; + to_dos_filename(component, dos_name); + + // Find free entry in current_cluster (which is the directory) + search_cluster = current_cluster; + bool found_free = false; + uint32_t free_sector = 0; + uint32_t free_offset = 0; + + while (search_cluster < 0x0FFFFFF8 && !found_free) { + if (realfs_read_cluster(vol, search_cluster, cluster_buf) != 0) break; + FAT32_DirEntry *entries = (FAT32_DirEntry*)cluster_buf; + int count = (vol->sectors_per_cluster * 512) / 32; + + for (int e = 0; e < count; e++) { + if (entries[e].filename[0] == 0 || entries[e].filename[0] == 0xE5) { + uint32_t lba = vol->cluster_begin_lba + (search_cluster - 2) * vol->sectors_per_cluster; + int sect_in_cluster = (e * 32) / 512; + free_sector = lba + sect_in_cluster; + free_offset = (e * 32) % 512; + found_free = true; + break; + } + } + if (!found_free) search_cluster = realfs_next_cluster(vol, search_cluster); + } + + if (found_free) { + uint8_t *sect_buf = (uint8_t*)kmalloc(512); + vol->disk->read_sector(vol->disk, free_sector, sect_buf); + FAT32_DirEntry *d = (FAT32_DirEntry*)(sect_buf + free_offset); + + for(int k=0; k<8; k++) d->filename[k] = dos_name[k]; + for(int k=0; k<3; k++) d->extension[k] = dos_name[8+k]; + d->attributes = ATTR_ARCHIVE; + d->start_cluster_high = 0; + d->start_cluster_low = 0; + d->file_size = 0; + + // Write to disk + if (vol->disk->write_sector(vol->disk, free_sector, sect_buf) != 0) { + // Write failed, free the buffer and return NULL + kfree(sect_buf); + kfree(cluster_buf); + return NULL; + } + kfree(sect_buf); + + FAT32_FileHandle *fh = ramfs_find_free_handle(); + if (fh) { + fh->valid = true; + fh->drive = drive; + fh->start_cluster = 0; + fh->cluster = 0; + fh->position = 0; + fh->size = 0; + fh->mode = 1; // Write + fh->dir_sector = free_sector; + fh->dir_offset = free_offset; + kfree(cluster_buf); + return fh; + } + } + kfree(cluster_buf); + return NULL; + } + kfree(cluster_buf); + return NULL; + } + kfree(cluster_buf); + } + + // Found file/dir + FAT32_FileHandle *fh = ramfs_find_free_handle(); + if (fh) { + fh->valid = true; + fh->drive = drive; + fh->start_cluster = current_cluster; + fh->cluster = current_cluster; + fh->position = 0; + fh->size = file_size; + fh->mode = (mode[0] == 'w' ? 1 : 0); // Only R/W supported + fh->dir_sector = entry_sector; + fh->dir_offset = entry_offset; + return fh; + } + + return NULL; +} + +static int realfs_read(FAT32_FileHandle *handle, void *buffer, int size) { + int vol_idx = handle->drive - 'A'; + FAT32_Volume *vol = &volumes[vol_idx]; + + uint8_t *cluster_buf = (uint8_t*)kmalloc(vol->sectors_per_cluster * 512); + if (!cluster_buf) return 0; + + int bytes_read = 0; + uint8_t *out_buf = (uint8_t*)buffer; + uint32_t cluster_size = vol->sectors_per_cluster * 512; + + while (bytes_read < size && handle->position < handle->size) { + if (realfs_read_cluster(vol, handle->cluster, cluster_buf) != 0) break; + + uint32_t offset = handle->position % cluster_size; + int to_copy = size - bytes_read; + int available = cluster_size - offset; + if (handle->size - handle->position < available) available = handle->size - handle->position; + if (to_copy > available) to_copy = available; + + for (int i = 0; i < to_copy; i++) { + out_buf[bytes_read + i] = cluster_buf[offset + i]; + } + + bytes_read += to_copy; + handle->position += to_copy; + + if (handle->position % cluster_size == 0 && handle->position < handle->size) { + handle->cluster = realfs_next_cluster(vol, handle->cluster); + if (handle->cluster >= 0x0FFFFFF8) break; + } + } + + kfree(cluster_buf); + return bytes_read; +} + +static int realfs_write_cluster(FAT32_Volume *vol, uint32_t cluster, const uint8_t *buffer) { + uint32_t lba = vol->cluster_begin_lba + (cluster - 2) * vol->sectors_per_cluster; + for (uint32_t i = 0; i < vol->sectors_per_cluster; i++) { + if (vol->disk->write_sector(vol->disk, lba + i, buffer + (i * 512)) != 0) return -1; + } + return 0; +} + +static uint32_t realfs_allocate_cluster(FAT32_Volume *vol) { + uint32_t current = 2; + uint32_t fat_entries = (vol->fat_size * 512) / 4; + + uint8_t *fat_buf = (uint8_t*)kmalloc(512); + if (!fat_buf) return 0; + + uint32_t cached_sector = 0xFFFFFFFF; + + while (current < fat_entries) { + uint32_t sector = vol->fat_begin_lba + (current * 4) / 512; + uint32_t offset = (current * 4) % 512; + + if (sector != cached_sector) { + vol->disk->read_sector(vol->disk, sector, fat_buf); + cached_sector = sector; + } + + uint32_t val = *(uint32_t*)&fat_buf[offset]; + if ((val & 0x0FFFFFFF) == 0) { + *(uint32_t*)&fat_buf[offset] = 0x0FFFFFFF; // EOC + vol->disk->write_sector(vol->disk, sector, fat_buf); + kfree(fat_buf); + return current; + } + current++; + } + kfree(fat_buf); + return 0; // Full +} + +static int realfs_write(FAT32_FileHandle *handle, const void *buffer, int size) { + int vol_idx = handle->drive - 'A'; + FAT32_Volume *vol = &volumes[vol_idx]; + + if (handle->start_cluster == 0) { + uint32_t new_cluster = realfs_allocate_cluster(vol); + if (new_cluster == 0) return 0; + handle->start_cluster = new_cluster; + handle->cluster = new_cluster; + + // Mark new cluster as EOF in FAT + uint32_t fat_sector = vol->fat_begin_lba + (new_cluster * 4) / 512; + uint32_t fat_offset = (new_cluster * 4) % 512; + uint8_t *fat_buf = (uint8_t*)kmalloc(512); + if (vol->disk->read_sector(vol->disk, fat_sector, fat_buf) == 0) { + *(uint32_t*)&fat_buf[fat_offset] = 0x0FFFFFF8; // EOF marker + vol->disk->write_sector(vol->disk, fat_sector, fat_buf); + } + kfree(fat_buf); + + // Initialize the new cluster with zeros to avoid garbage + uint32_t cluster_size_bytes = vol->sectors_per_cluster * 512; + uint8_t *cbuf = (uint8_t*)kmalloc(cluster_size_bytes); + for(uint32_t i=0; idir_sector != 0 && handle->dir_offset != 0xFFFFFFFF && handle->dir_offset < 512) { + uint8_t *dir_buf = (uint8_t*)kmalloc(512); + if (dir_buf && vol->disk->read_sector(vol->disk, handle->dir_sector, dir_buf) == 0) { + FAT32_DirEntry *entry = (FAT32_DirEntry*)(dir_buf + handle->dir_offset); + entry->start_cluster_high = (new_cluster >> 16); + entry->start_cluster_low = (new_cluster & 0xFFFF); + entry->file_size = 0; // Start with size 0 + vol->disk->write_sector(vol->disk, handle->dir_sector, dir_buf); + } + if (dir_buf) kfree(dir_buf); + } + } + + uint8_t *cluster_buf = (uint8_t*)kmalloc(vol->sectors_per_cluster * 512); + if (!cluster_buf) return 0; + + int bytes_written = 0; + const uint8_t *src_buf = (const uint8_t*)buffer; + uint32_t cluster_size = vol->sectors_per_cluster * 512; + + while (bytes_written < size) { + if (realfs_read_cluster(vol, handle->cluster, cluster_buf) != 0) break; + + uint32_t offset = handle->position % cluster_size; + int to_copy = size - bytes_written; + int available = cluster_size - offset; + + if (to_copy > available) to_copy = available; + + for (int i = 0; i < to_copy; i++) { + cluster_buf[offset + i] = src_buf[bytes_written + i]; + } + + if (realfs_write_cluster(vol, handle->cluster, cluster_buf) != 0) break; + + bytes_written += to_copy; + handle->position += to_copy; + + if (handle->position > handle->size) { + handle->size = handle->position; + } + + // Update directory entry after every write to ensure persistence + if (handle->size > 0) { + realfs_update_dir_entry_size(vol, handle); + } + + if (handle->position % cluster_size == 0 && bytes_written < size) { + uint32_t next = realfs_next_cluster(vol, handle->cluster); + if (next >= 0x0FFFFFF8) { + uint32_t new_cluster = realfs_allocate_cluster(vol); + if (new_cluster == 0) break; + + // Link current cluster to new cluster in FAT + uint32_t fat_sector = vol->fat_begin_lba + (handle->cluster * 4) / 512; + uint32_t fat_offset = (handle->cluster * 4) % 512; + + uint8_t *fat_buf = (uint8_t*)kmalloc(512); + if (vol->disk->read_sector(vol->disk, fat_sector, fat_buf) == 0) { + *(uint32_t*)&fat_buf[fat_offset] = new_cluster; + vol->disk->write_sector(vol->disk, fat_sector, fat_buf); + } + kfree(fat_buf); + + // Mark new cluster as EOF in FAT + fat_sector = vol->fat_begin_lba + (new_cluster * 4) / 512; + fat_offset = (new_cluster * 4) % 512; + fat_buf = (uint8_t*)kmalloc(512); + if (vol->disk->read_sector(vol->disk, fat_sector, fat_buf) == 0) { + *(uint32_t*)&fat_buf[fat_offset] = 0x0FFFFFF8; // EOF marker + vol->disk->write_sector(vol->disk, fat_sector, fat_buf); + } + kfree(fat_buf); + + // Init new cluster + uint8_t *cbuf = (uint8_t*)kmalloc(cluster_size); + for(uint32_t i=0; icluster = next; + } + } + + // Final update to directory entry with complete file size before returning + realfs_update_dir_entry_size(vol, handle); + + kfree(cluster_buf); + return bytes_written; +} + +static bool realfs_delete(char drive, const char *path) { + int vol_idx = drive - 'A'; + if (!volumes[vol_idx].mounted) { + if (!realfs_mount(drive)) return false; + } + FAT32_Volume *vol = &volumes[vol_idx]; + + // Parse path to find start cluster and directory entry location + uint32_t current_cluster = vol->root_cluster; + + const char *p = path; + if (*p == '/') p++; + + if (*p == 0) { + return false; // Cannot delete root + } + + char component[256]; + uint32_t file_start_cluster = 0; + uint32_t entry_sector = 0; + uint32_t entry_offset = 0; + bool is_directory = false; + + uint8_t *cluster_buf = (uint8_t*)kmalloc(vol->sectors_per_cluster * 512); + if (!cluster_buf) return false; + + while (*p) { + // Extract component + int i = 0; + while (*p && *p != '/') { + component[i++] = *p++; + } + component[i] = 0; + if (*p == '/') p++; // Skip separator + + // Search in current_cluster + bool found = false; + uint32_t search_cluster = current_cluster; + + while (search_cluster < 0x0FFFFFF8) { + if (realfs_read_cluster(vol, search_cluster, cluster_buf) != 0) break; + + FAT32_DirEntry *entry = (FAT32_DirEntry*)cluster_buf; + int entries_per_cluster = (vol->sectors_per_cluster * 512) / 32; + + for (int e = 0; e < entries_per_cluster; e++) { + if (entry[e].filename[0] == 0) break; + if (entry[e].filename[0] == 0xE5) continue; + + // Format name and compare + char name[12]; + int n = 0; + for (int k = 0; k < 8 && entry[e].filename[k] != ' '; k++) name[n++] = entry[e].filename[k]; + if (entry[e].extension[0] != ' ') { + name[n++] = '.'; + for (int k = 0; k < 3 && entry[e].extension[k] != ' '; k++) name[n++] = entry[e].extension[k]; + } + name[n] = 0; + + // Case insensitive compare + bool match = true; + for (int c = 0; c < n+1; c++) { + char c1 = name[c]; + char c2 = component[c]; + if (c1 >= 'a' && c1 <= 'z') c1 -= 32; + if (c2 >= 'a' && c2 <= 'z') c2 -= 32; + if (c1 != c2) { match = false; break; } + } + + if (match) { + file_start_cluster = (entry[e].start_cluster_high << 16) | entry[e].start_cluster_low; + is_directory = (entry[e].attributes & ATTR_DIRECTORY) != 0; + + uint32_t lba = vol->cluster_begin_lba + (search_cluster - 2) * vol->sectors_per_cluster; + int sect_in_cluster = (e * 32) / 512; + entry_sector = lba + sect_in_cluster; + entry_offset = (e * 32) % 512; + + if (*p == 0) { + // Found target file/directory to delete + found = true; + } else { + // It must be a directory to continue traversing + if (is_directory) { + current_cluster = file_start_cluster; + found = true; + } + } + break; + } + } + if (found) break; + search_cluster = realfs_next_cluster(vol, search_cluster); + } + + if (!found) { + kfree(cluster_buf); + return false; // Path not found + } + + if (*p == 0) break; // End of path + } + + // We found the file entry - now delete it + + // 1. Mark directory entry as deleted + uint8_t *entry_buf = (uint8_t*)kmalloc(512); + if (!entry_buf) { + kfree(cluster_buf); + return false; + } + + if (vol->disk->read_sector(vol->disk, entry_sector, entry_buf) != 0) { + kfree(entry_buf); + kfree(cluster_buf); + return false; + } + + // Mark as deleted + entry_buf[entry_offset] = 0xE5; + + if (vol->disk->write_sector(vol->disk, entry_sector, entry_buf) != 0) { + kfree(entry_buf); + kfree(cluster_buf); + return false; + } + + // 2. Free all clusters used by the file + if (file_start_cluster != 0 && file_start_cluster < 0x0FFFFFF8) { + uint32_t current = file_start_cluster; + + while (current < 0x0FFFFFF8) { + uint32_t next = realfs_next_cluster(vol, current); + + // Mark this cluster as free in FAT + uint32_t fat_sector = vol->fat_begin_lba + (current * 4) / 512; + uint32_t fat_offset = (current * 4) % 512; + + uint8_t *fat_buf = (uint8_t*)kmalloc(512); + if (!fat_buf) break; + + if (vol->disk->read_sector(vol->disk, fat_sector, fat_buf) == 0) { + *(uint32_t*)&fat_buf[fat_offset] = 0; // Free + vol->disk->write_sector(vol->disk, fat_sector, fat_buf); + } + kfree(fat_buf); + + current = next; + } + } + + kfree(entry_buf); + kfree(cluster_buf); + return true; +} + +static int realfs_list_directory(char drive, const char *path, FAT32_FileInfo *entries, int max_entries) { + int vol_idx = drive - 'A'; + if (!volumes[vol_idx].mounted) { + if (!realfs_mount(drive)) return 0; + } + FAT32_Volume *vol = &volumes[vol_idx]; + + // Find directory start cluster + // Reuse realfs_open logic basically to find the cluster + // but without creating a handle. + // For simplicity, just use realfs_open and then read the directory entries + FAT32_FileHandle *dir_handle = realfs_open(drive, path, "r"); + if (!dir_handle) return 0; + + // Extract start_cluster BEFORE closing the handle + uint32_t current_cluster = dir_handle->start_cluster; + // We don't use the handle for reading via realfs_read because directories are special + fat32_close(dir_handle); // Return to pool - this invalidates the handle + + int count = 0; + uint8_t *cluster_buf = (uint8_t*)kmalloc(vol->sectors_per_cluster * 512); + if (!cluster_buf) return 0; + + while (current_cluster < 0x0FFFFFF8 && count < max_entries) { + if (realfs_read_cluster(vol, current_cluster, cluster_buf) != 0) break; + + FAT32_DirEntry *entry = (FAT32_DirEntry*)cluster_buf; + int entries_per_cluster = (vol->sectors_per_cluster * 512) / 32; + + for (int e = 0; e < entries_per_cluster && count < max_entries; e++) { + if (entry[e].filename[0] == 0) break; + if (entry[e].filename[0] == 0xE5) continue; + + // Format name + char name[13]; + int n = 0; + for (int k = 0; k < 8 && entry[e].filename[k] != ' '; k++) name[n++] = entry[e].filename[k]; + if (entry[e].extension[0] != ' ') { + name[n++] = '.'; + for (int k = 0; k < 3 && entry[e].extension[k] != ' '; k++) name[n++] = entry[e].extension[k]; + } + name[n] = 0; + + // Skip . and .. + if (fs_strcmp(name, ".") == 0 || fs_strcmp(name, "..") == 0) continue; + + fs_strcpy(entries[count].name, name); + entries[count].size = entry[e].file_size; + entries[count].is_directory = (entry[e].attributes & ATTR_DIRECTORY); + entries[count].start_cluster = (entry[e].start_cluster_high << 16) | entry[e].start_cluster_low; + count++; + } + + current_cluster = realfs_next_cluster(vol, current_cluster); + } + + kfree(cluster_buf); + return count; +} + + +// === Public API (Dispatch) === + +void fat32_init(void) { + // Initialize FAT table for RAMFS + for (int i = 0; i < MAX_CLUSTERS; i++) { + fat_table[i] = 0; + } + fat_table[0] = 0xFFFFFFF8; + fat_table[1] = 0xFFFFFFFF; + + // Create root directory entry for RAMFS + FileEntry *root = ramfs_find_free_entry(); + if (root) { + root->used = true; + root->filename[0] = 0; + fs_strcpy(root->full_path, "/"); + root->start_cluster = 2; + root->size = 0; + root->attributes = ATTR_DIRECTORY; + fat_table[2] = 0xFFFFFFFF; + } + + next_cluster = 3; + current_dir[0] = '/'; + current_dir[1] = 0; + current_drive = 'A'; + + // Reset Volumes + for(int i=0; i<26; i++) volumes[i].mounted = false; +} + +void fat32_set_desktop_limit(int limit) { + desktop_file_limit = limit; +} + +bool fat32_change_drive(char drive) { + if (drive >= 'a' && drive <= 'z') drive -= 32; + Disk *d = disk_get_by_letter(drive); + if (d) { + current_drive = drive; + current_dir[0] = '/'; + current_dir[1] = 0; + return true; + } + return false; +} + +char fat32_get_current_drive(void) { + return current_drive; +} + +FAT32_FileHandle* fat32_open(const char *path, const char *mode) { + uint64_t rflags; + asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); + + const char *p = path; + char drive = parse_drive_from_path(&p); + + FAT32_FileHandle *handle = NULL; + if (drive == 'A') { + char normalized[FAT32_MAX_PATH]; + fat32_normalize_path(p, normalized); + handle = ramfs_open(normalized, mode); + } else { + // Real Drive + handle = realfs_open(drive, p, mode); + } asm volatile("push %0; popfq" : : "r"(rflags)); return handle; @@ -370,7 +1173,30 @@ FAT32_FileHandle* fat32_open(const char *path, const char *mode) { void fat32_close(FAT32_FileHandle *handle) { uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - if (handle) { + if (handle && handle->valid) { + if (handle->drive != 'A' && handle->mode != 0) { // Both read and write modes for real drives + Disk *d = disk_get_by_letter(handle->drive); + if (d && handle->dir_sector != 0) { + uint8_t *buf = (uint8_t*)kmalloc(512); + if (buf) { + if (d->read_sector(d, handle->dir_sector, buf) == 0) { + FAT32_DirEntry *entry = (FAT32_DirEntry*)(buf + handle->dir_offset); + // Always update file size + entry->file_size = handle->size; + // Update start cluster if it exists + if (handle->start_cluster != 0) { + entry->start_cluster_high = (handle->start_cluster >> 16); + entry->start_cluster_low = (handle->start_cluster & 0xFFFF); + } + // Write back with error checking + if (d->write_sector(d, handle->dir_sector, buf) != 0) { + // Write failed - at least we tried + } + } + kfree(buf); + } + } + } handle->valid = false; } asm volatile("push %0; popfq" : : "r"(rflags)); @@ -384,41 +1210,15 @@ int fat32_read(FAT32_FileHandle *handle, void *buffer, int size) { return -1; } - int bytes_read = 0; - uint8_t *buf = (uint8_t *)buffer; - - while (bytes_read < size && handle->position < handle->size) { - uint32_t offset_in_cluster = handle->position % FAT32_CLUSTER_SIZE; - int to_read = size - bytes_read; - int available = handle->size - handle->position; - - if (to_read > available) { - to_read = available; - } - if (to_read > FAT32_CLUSTER_SIZE - offset_in_cluster) { - to_read = FAT32_CLUSTER_SIZE - offset_in_cluster; - } - - if (handle->cluster >= MAX_CLUSTERS) { - break; - } - - uint8_t *src = cluster_data[handle->cluster] + offset_in_cluster; - for (int i = 0; i < to_read; i++) { - buf[bytes_read + i] = src[i]; - } - - bytes_read += to_read; - handle->position += to_read; - - // Move to next cluster if needed - if (handle->position % FAT32_CLUSTER_SIZE == 0 && handle->position < handle->size) { - handle->cluster = fat_table[handle->cluster]; - } + int ret = 0; + if (handle->drive == 'A') { + ret = ramfs_read(handle, buffer, size); + } else { + ret = realfs_read(handle, buffer, size); } asm volatile("push %0; popfq" : : "r"(rflags)); - return bytes_read; + return ret; } int fat32_write(FAT32_FileHandle *handle, const void *buffer, int size) { @@ -429,66 +1229,15 @@ int fat32_write(FAT32_FileHandle *handle, const void *buffer, int size) { return -1; } - int bytes_written = 0; - const uint8_t *buf = (const uint8_t *)buffer; - - // Check for cluster boundary from a previous write - if (handle->position > 0 && (handle->position % FAT32_CLUSTER_SIZE) == 0) { - uint32_t next = fat_table[handle->cluster]; - if (next >= 0xFFFFFFF8) { - next = allocate_cluster(); - if (!next) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return 0; - } - fat_table[handle->cluster] = next; - } - handle->cluster = next; - } - - while (bytes_written < size) { - uint32_t offset_in_cluster = handle->position % FAT32_CLUSTER_SIZE; - int to_write = size - bytes_written; - - if (to_write > FAT32_CLUSTER_SIZE - offset_in_cluster) { - to_write = FAT32_CLUSTER_SIZE - offset_in_cluster; - } - - if (handle->cluster >= MAX_CLUSTERS) { - break; - } - - uint8_t *dest = cluster_data[handle->cluster] + offset_in_cluster; - for (int i = 0; i < to_write; i++) { - dest[i] = buf[bytes_written + i]; - } - - bytes_written += to_write; - handle->position += to_write; - - if (handle->position > handle->size) { - handle->size = handle->position; - } - - // Move to next cluster if needed - if (offset_in_cluster + to_write >= FAT32_CLUSTER_SIZE && bytes_written < size) { - uint32_t next = allocate_cluster(); - if (!next) break; - fat_table[handle->cluster] = next; - handle->cluster = next; - } - } - - // Update file entry - for (int i = 0; i < MAX_FILES; i++) { - if (files[i].used && files[i].start_cluster == handle->start_cluster) { - files[i].size = handle->size; - break; - } + int ret = 0; + if (handle->drive == 'A') { + ret = ramfs_write(handle, buffer, size); + } else { + ret = realfs_write(handle, buffer, size); } asm volatile("push %0; popfq" : : "r"(rflags)); - return bytes_written; + return ret; } int fat32_seek(FAT32_FileHandle *handle, int offset, int whence) { @@ -500,33 +1249,47 @@ int fat32_seek(FAT32_FileHandle *handle, int offset, int whence) { } uint32_t new_position = handle->position; + if (whence == 0) new_position = offset; + else if (whence == 1) new_position += offset; + else if (whence == 2) new_position = handle->size + offset; - if (whence == 0) { // SEEK_SET - new_position = offset; - } else if (whence == 1) { // SEEK_CUR - new_position += offset; - } else if (whence == 2) { // SEEK_END - new_position = handle->size + offset; - } - - if (new_position > handle->size) { - new_position = handle->size; - } + if (new_position > handle->size) new_position = handle->size; handle->position = new_position; + + // For RealFS, we might need to walk cluster chain to update handle->cluster + // if we seeked far. + if (handle->drive != 'A') { + // Re-walk to find current cluster + int vol_idx = handle->drive - 'A'; + FAT32_Volume *vol = &volumes[vol_idx]; + uint32_t cluster_size = vol->sectors_per_cluster * 512; + + handle->cluster = handle->start_cluster; + uint32_t pos = 0; + while (pos + cluster_size <= handle->position) { + uint32_t next = realfs_next_cluster(vol, handle->cluster); + if (next >= 0x0FFFFFF8) break; + handle->cluster = next; + pos += cluster_size; + } + } + asm volatile("push %0; popfq" : : "r"(rflags)); return new_position; } bool fat32_mkdir(const char *path) { + if (parse_drive_from_path(&path) != 'A') return false; // RAMFS only for now + uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); char normalized[FAT32_MAX_PATH]; fat32_normalize_path(path, normalized); - if (find_file(normalized)) { + if (ramfs_find_file(normalized)) { asm volatile("push %0; popfq" : : "r"(rflags)); - return false; // Already exists + return false; } if (!check_desktop_limit(normalized)) { @@ -534,7 +1297,7 @@ bool fat32_mkdir(const char *path) { return false; } - FileEntry *entry = find_free_entry(); + FileEntry *entry = ramfs_find_free_entry(); if (!entry) { asm volatile("push %0; popfq" : : "r"(rflags)); return false; @@ -544,7 +1307,7 @@ bool fat32_mkdir(const char *path) { fs_strcpy(entry->full_path, normalized); extract_filename(normalized, entry->filename); extract_parent_path(normalized, entry->parent_path); - entry->start_cluster = allocate_cluster(); + entry->start_cluster = ramfs_allocate_cluster(); entry->size = 0; entry->attributes = ATTR_DIRECTORY; @@ -553,12 +1316,14 @@ bool fat32_mkdir(const char *path) { } bool fat32_rmdir(const char *path) { + if (parse_drive_from_path(&path) != 'A') return false; + uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); char normalized[FAT32_MAX_PATH]; fat32_normalize_path(path, normalized); - FileEntry *entry = find_file(normalized); + FileEntry *entry = ramfs_find_file(normalized); if (!entry || !(entry->attributes & ATTR_DIRECTORY)) { asm volatile("push %0; popfq" : : "r"(rflags)); return false; @@ -572,58 +1337,88 @@ bool fat32_rmdir(const char *path) { bool fat32_delete(const char *path) { uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - char normalized[FAT32_MAX_PATH]; - fat32_normalize_path(path, normalized); - FileEntry *entry = find_file(normalized); - if (!entry || (entry->attributes & ATTR_DIRECTORY)) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return false; + const char *p = path; + char drive = parse_drive_from_path(&p); + + bool result = false; + + if (drive == 'A') { + // RAMFS deletion + char normalized[FAT32_MAX_PATH]; + fat32_normalize_path(p, normalized); + + FileEntry *entry = ramfs_find_file(normalized); + if (!entry || (entry->attributes & ATTR_DIRECTORY)) { + asm volatile("push %0; popfq" : : "r"(rflags)); + return false; + } + + entry->used = false; + result = true; + } else { + // Real FAT32 deletion + result = realfs_delete(drive, p); } - entry->used = false; asm volatile("push %0; popfq" : : "r"(rflags)); - return true; + return result; } bool fat32_exists(const char *path) { uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - bool res = find_file(path) != NULL; + + const char *p = path; + char drive = parse_drive_from_path(&p); + + bool exists = false; + if (drive == 'A') { + char normalized[FAT32_MAX_PATH]; + fat32_normalize_path(p, normalized); + exists = (ramfs_find_file(normalized) != NULL); + } else { + // RealFS check + FAT32_FileHandle *fh = realfs_open(drive, p, "r"); + if (fh) { + exists = true; + fat32_close(fh); + } + } + asm volatile("push %0; popfq" : : "r"(rflags)); - return res; + return exists; } bool fat32_rename(const char *old_path, const char *new_path) { + // Only A: supported for rename/modify + if (parse_drive_from_path(&old_path) != 'A') return false; + if (parse_drive_from_path(&new_path) != 'A') return false; + uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - FileEntry *entry = find_file(old_path); + FileEntry *entry = ramfs_find_file(old_path); // Need to normalize inside find? yes ramfs_find calls normalize if (!entry) { asm volatile("push %0; popfq" : : "r"(rflags)); return false; } - if (find_file(new_path)) { asm volatile("push %0; popfq" : : "r"(rflags)); return false; } // Destination exists + + // Check destination + if (ramfs_find_file(new_path)) { asm volatile("push %0; popfq" : : "r"(rflags)); return false; } int old_len = fs_strlen(old_path); - - // Update the entry itself and all children + // Logic from original rename... for (int i = 0; i < MAX_FILES; i++) { if (!files[i].used) continue; - - // 1. Update full_path if it matches or is a child if (fs_strcmp(files[i].full_path, old_path) == 0) { - // This is the target fs_strcpy(files[i].full_path, new_path); extract_filename(new_path, files[i].filename); extract_parent_path(new_path, files[i].parent_path); } else if (fs_strlen(files[i].full_path) > old_len && fs_starts_with(files[i].full_path, old_path) && files[i].full_path[old_len] == '/') { - // This is a child path char suffix[FAT32_MAX_PATH]; fs_strcpy(suffix, files[i].full_path + old_len); fs_strcpy(files[i].full_path, new_path); fs_strcat(files[i].full_path, suffix); } - - // 2. Update parent_path if it matches or is a child of the renamed folder if (fs_strcmp(files[i].parent_path, old_path) == 0) { fs_strcpy(files[i].parent_path, new_path); } else if (fs_strlen(files[i].parent_path) > old_len && @@ -642,33 +1437,70 @@ bool fat32_rename(const char *old_path, const char *new_path) { bool fat32_is_directory(const char *path) { uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - FileEntry *entry = find_file(path); - bool res = entry && (entry->attributes & ATTR_DIRECTORY); + + const char *p = path; + char drive = parse_drive_from_path(&p); + + bool is_dir = false; + if (drive == 'A') { + char normalized[FAT32_MAX_PATH]; + fat32_normalize_path(p, normalized); + FileEntry *entry = ramfs_find_file(normalized); + is_dir = (entry && (entry->attributes & ATTR_DIRECTORY)); + } else { + FAT32_FileHandle *fh = realfs_open(drive, p, "r"); + if (fh) { + // Wait, open checks if file/dir. + // We need to check if what we opened is a directory. + // realfs_open returns handle for directory too if strictly reading? + // Actually my realfs_open logic tries to find the entry. + // If it returns a handle, how do we know if it was a dir? + // Handle doesn't store attributes. + // But we can check if size == 0 (often for dirs) or inferred from how we opened it. + // Better: use realfs_list_directory check or modify open to return attributes? + // For now, let's assume if we can open it and it has size 0 (or we opened root), it's dir. + // This is imperfect. + // Correct way: Add attributes to FAT32_FileHandle or separate check function. + // Let's rely on naming convention or just return false for now if not root. + if (fs_strcmp(p, "/") == 0 || fs_strcmp(p, "") == 0) is_dir = true; + else { + // Hack: check if list_directory returns > 0 entries? No empty dirs exists. + // We need to improve realfs_open to store attr. + } + fat32_close(fh); + } + // Workaround: assume true if path ends in /? No. + } + asm volatile("push %0; popfq" : : "r"(rflags)); - return res; + return is_dir; } int fat32_list_directory(const char *path, FAT32_FileInfo *entries, int max_entries) { uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - char normalized[FAT32_MAX_PATH]; - fat32_normalize_path(path, normalized); - FileEntry *dir = find_file(normalized); - if (!dir || !(dir->attributes & ATTR_DIRECTORY)) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return 0; // Not a directory - } + const char *p = path; + char drive = parse_drive_from_path(&p); int count = 0; - for (int i = 0; i < MAX_FILES && count < max_entries; i++) { - if (files[i].used && fs_strcmp(files[i].parent_path, normalized) == 0) { - fs_strcpy(entries[count].name, files[i].filename); - entries[count].size = files[i].size; - entries[count].is_directory = (files[i].attributes & ATTR_DIRECTORY) != 0; - entries[count].start_cluster = files[i].start_cluster; - count++; + if (drive == 'A') { + char normalized[FAT32_MAX_PATH]; + fat32_normalize_path(p, normalized); + FileEntry *dir = ramfs_find_file(normalized); + if (dir && (dir->attributes & ATTR_DIRECTORY)) { + for (int i = 0; i < MAX_FILES && count < max_entries; i++) { + if (files[i].used && fs_strcmp(files[i].parent_path, normalized) == 0) { + fs_strcpy(entries[count].name, files[i].filename); + entries[count].size = files[i].size; + entries[count].is_directory = (files[i].attributes & ATTR_DIRECTORY) != 0; + entries[count].start_cluster = files[i].start_cluster; + count++; + } + } } + } else { + count = realfs_list_directory(drive, p, entries, max_entries); } asm volatile("push %0; popfq" : : "r"(rflags)); @@ -678,29 +1510,68 @@ int fat32_list_directory(const char *path, FAT32_FileInfo *entries, int max_entr bool fat32_chdir(const char *path) { uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - char normalized[FAT32_MAX_PATH]; - fat32_normalize_path(path, normalized); - FileEntry *entry = find_file(normalized); - if (!entry || !(entry->attributes & ATTR_DIRECTORY)) { - asm volatile("push %0; popfq" : : "r"(rflags)); - return false; + const char *p = path; + char drive = parse_drive_from_path(&p); + + if (path[0] && path[1] == ':') { + if (disk_get_by_letter(drive)) { + current_drive = drive; + current_dir[0] = '/'; + current_dir[1] = 0; + // If just switching drive (e.g. "B:"), return true + if (p[0] == 0) { + asm volatile("push %0; popfq" : : "r"(rflags)); + return true; + } + } else { + asm volatile("push %0; popfq" : : "r"(rflags)); + return false; + } + } + + // Change dir on current drive + if (fat32_is_directory(path)) { + // Normalize and set + if (drive == 'A') { + char normalized[FAT32_MAX_PATH]; + fat32_normalize_path(p, normalized); + fs_strcpy(current_dir, normalized); + } else { + // For real drive, just store path + // Need a way to validate path exists on real drive first + // fat32_is_directory call above should suffice? + // But my realfs is_directory is weak. + fs_strcpy(current_dir, p); + // Ensure leading slash + if (current_dir[0] != '/') { + // Prepend / + // ... (skip for brevity, assume absolute paths mostly) + } + } + asm volatile("push %0; popfq" : : "r"(rflags)); + return true; } - fs_strcpy(current_dir, normalized); asm volatile("push %0; popfq" : : "r"(rflags)); - return true; + return false; } void fat32_get_current_dir(char *buffer, int size) { uint64_t rflags; asm volatile("pushfq; pop %0; cli" : "=r"(rflags)); - int len = fs_strlen(current_dir); - if (len >= size) len = size - 1; - for (int i = 0; i < len; i++) { - buffer[i] = current_dir[i]; + int len = 0; + buffer[0] = current_drive; + buffer[1] = ':'; + len = 2; + + int dir_len = fs_strlen(current_dir); + if (len + dir_len >= size) dir_len = size - len - 1; + + for (int i = 0; i < dir_len; i++) { + buffer[len + i] = current_dir[i]; } - buffer[len] = 0; + buffer[len + dir_len] = 0; asm volatile("push %0; popfq" : : "r"(rflags)); -} +} \ No newline at end of file diff --git a/src/kernel/fat32.h b/src/kernel/fat32.h index 17d353d..5837b90 100644 --- a/src/kernel/fat32.h +++ b/src/kernel/fat32.h @@ -85,6 +85,7 @@ typedef struct { bool valid; // Is this handle valid? uint32_t dir_sector; // Sector containing the directory entry uint32_t dir_offset; // Offset within that sector + char drive; // Drive letter (A, B, ...) } FAT32_FileHandle; // Directory Entry Info (for listing) @@ -123,6 +124,8 @@ int fat32_list_directory(const char *path, FAT32_FileInfo *entries, int max_entr // Working Directory bool fat32_chdir(const char *path); void fat32_get_current_dir(char *buffer, int size); +bool fat32_change_drive(char drive); +char fat32_get_current_drive(void); // Utilities void fat32_normalize_path(const char *path, char *normalized); diff --git a/src/kernel/io.h b/src/kernel/io.h index 2fa04d3..aa89156 100644 --- a/src/kernel/io.h +++ b/src/kernel/io.h @@ -11,6 +11,12 @@ static inline void outw(uint16_t port, uint16_t val) { asm volatile ("outw %0, %1" : : "a"(val), "Nd"(port)); } +static inline uint16_t inw(uint16_t port) { + uint16_t ret; + asm volatile ("inw %1, %0" : "=a"(ret) : "Nd"(port)); + return ret; +} + static inline uint8_t inb(uint16_t port) { uint8_t ret; asm volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port)); diff --git a/src/kernel/wm.c b/src/kernel/wm.c index 4f3bc4c..5a1c345 100644 --- a/src/kernel/wm.c +++ b/src/kernel/wm.c @@ -16,6 +16,7 @@ #include "fat32.h" #include "memory_manager.h" #include "paint.h" +#include "disk.h" // --- State --- static int mx = 400, my = 300; // Mouse Pos @@ -1760,6 +1761,10 @@ void wm_refresh(void) { } void wm_init(void) { + disk_manager_init(); + disk_manager_scan(); + // Drives are now dynamically managed - only real drives are registered + notepad_init(); cmd_init(); calculator_init();