250 lines
8.0 KiB
C
250 lines
8.0 KiB
C
#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <string.h>
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#include <syscall.h>
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#include <io_file.h>
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#define MAX_CMD 256
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// ---------------------------------------------------------------------------
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// Output helpers
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// ---------------------------------------------------------------------------
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static void print(const char* s) { SYS_WRITE_CONSOLE_REQUEST req = { SysSvFromCstr(s) }; SysWriteConsole(&req); }
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static uint32_t open_file(const char* path, uint32_t* handleOut) {
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SYS_PATH_HANDLE_REQUEST req = { SysSvFromCstr(path), handleOut };
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return SysOpenFile(&req);
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}
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static uint32_t create_file(const char* path, uint32_t* handleOut) {
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SYS_PATH_HANDLE_REQUEST req = { SysSvFromCstr(path), handleOut };
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return SysCreateFile(&req);
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}
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static uint32_t open_dir(const char* path, uint32_t* handleOut) {
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SYS_PATH_HANDLE_REQUEST req = { SysSvFromCstr(path), handleOut };
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return SysOpenDir(&req);
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}
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static uint32_t set_cwd(const char* path) {
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SYS_PATH_REQUEST req = { SysSvFromCstr(path) };
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return SysSetCwd(&req);
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}
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static uint32_t delete_file(const char* path) {
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SYS_PATH_REQUEST req = { SysSvFromCstr(path) };
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return SysDeleteFile(&req);
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}
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static uint32_t create_process(const char* path, uint32_t* handleOut, const char* cmdline) {
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SYS_CREATE_PROCESS_REQUEST req = { SysSvFromCstr(path), SysSvFromCstr(cmdline), handleOut };
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return SysCreateProcess(&req);
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}
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static void printUInt(uint32_t n) {
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char buf[12]; int i = 0;
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if (n == 0) { print("0"); return; }
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while (n > 0) { buf[i++] = (char)('0' + n % 10); n /= 10; }
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while (i > 0) { char c[2] = { buf[--i], '\0' }; print(c); }
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}
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static void printInt(int32_t n) {
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if (n < 0) { print("-"); printUInt((uint32_t)-(n + 1) + 1); }
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else { printUInt((uint32_t)n); }
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}
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static void printUInt64(uint64_t n) {
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if (n == 0) { print("0"); return; }
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char buf[20]; int i = 0;
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while (n > 0) { buf[i++] = (char)('0' + (int)(n % 10)); n /= 10; }
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while (i > 0) { char c[2] = { buf[--i], '\0' }; print(c); }
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}
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// ---------------------------------------------------------------------------
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// Line editor
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// ---------------------------------------------------------------------------
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static void readLine(char* buf, int len) {
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int pos = 0;
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while (true) {
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char c = SysKbReadChar();
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if (!c) { SysYield(); continue; }
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if (c == '\r' || c == '\n') { print("\n"); break; }
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if ((c == '\b' || c == 127) && pos > 0) { pos--; print("\b \b"); continue; }
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if (c < 0x20 || c == 127) continue;
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if (pos < len - 1) { buf[pos++] = c; char echo[2] = {c, '\0'}; print(echo); }
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}
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buf[pos] = '\0';
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}
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static char* trim(char* s) {
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while (*s == ' ') s++;
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int len = (int)strlen(s);
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while (len > 0 && s[len - 1] == ' ') len--;
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s[len] = '\0';
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return s;
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}
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// ---------------------------------------------------------------------------
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// Built-in commands
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// ---------------------------------------------------------------------------
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static void cmd_help() {
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print("Available commands:\n"
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" help - Show this list\n"
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" mem - Show memory usage\n"
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" dir [path] - List directory contents\n"
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" cd <path> - Change directory\n"
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" type <file> - Display file contents\n"
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" del <file> - Delete a file\n"
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" write <file> <tx> - Create a file with text\n"
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" clear - Clear the screen\n"
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" exit - Close the shell\n");
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}
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static void printSizeKiB(uint64_t bytes) {
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printUInt64(bytes / 1024u);
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print(" KiB");
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}
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static void cmd_mem(void) {
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SYS_MEMORY_STATUS st;
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if (SysGetMemoryStatus(&st) != 0) {
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print("mem: failed\n");
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return;
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}
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print("Memory Status:\n");
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print(" Free physical: ");
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printSizeKiB(st.FreePhysicalBytes);
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print("\n Kernel pool: ");
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printSizeKiB(st.KernelPoolBytes);
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print("\n User heap: ");
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printSizeKiB(st.UserHeapBytes);
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print("\n");
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}
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static void cmd_write(const char* args) {
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char filename[MAX_CMD]; int i = 0;
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while (args[i] != ' ' && args[i] != '\0' && i < MAX_CMD - 1) {
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filename[i] = args[i]; i++;
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}
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filename[i] = '\0';
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if (args[i] == '\0' || args[i+1] == '\0') { print("write: usage: write <filename> <text>\n"); return; }
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uint32_t hFile;
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if (create_file(filename, &hFile) != 0) { print("write: could not create file\n"); return; }
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size_t written;
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SysWriteFile(hFile, args + i + 1, strlen(args + i + 1), &written);
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SysCloseHandle(hFile);
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print("File written successfully.\n");
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}
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static void cmd_dir(const char* path) {
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uint32_t hDir;
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const char* target = (path && *path != '\0') ? path : ".";
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if (open_dir(target, &hDir) != 0) {
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print("dir: failed to open directory\n");
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return;
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}
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KDIR_ENTRY ke;
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while (SysReadDir(hDir, &ke) == 0) {
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// Corrected Attribute Check: 0x10 is the Directory bit in FAT
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if (ke.Attr & 0x10) {
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print("<DIR> ");
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} else {
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print(" ");
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}
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print(ke.Name);
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// Optional: print file size for non-directories
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if (!(ke.Attr & 0x10)) {
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print(" (");
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printUInt(ke.FileSize);
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print(" bytes)");
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}
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print("\n");
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}
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SysCloseHandle(hDir);
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}
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static void cmd_type(const char* filename) {
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uint32_t hFile;
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if (open_file(filename, &hFile) != 0) { print("type: cannot open file\n"); return; }
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char buffer[512]; size_t bytesRead;
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while (SysReadFile(hFile, buffer, sizeof(buffer) - 1, &bytesRead) == 0 && bytesRead > 0) {
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buffer[bytesRead] = '\0'; print(buffer);
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}
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SysCloseHandle(hFile); print("\n");
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}
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static bool extractProgramPath(const char* cmdline, char* out, size_t outSize) {
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if (!cmdline || !out || outSize == 0) return false;
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while (*cmdline == ' ' || *cmdline == '\t') cmdline++;
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if (*cmdline == '\0') return false;
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size_t pos = 0;
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if (*cmdline == '"') {
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cmdline++;
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while (*cmdline && *cmdline != '"' && pos + 1 < outSize)
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out[pos++] = *cmdline++;
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} else {
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while (*cmdline && *cmdline != ' ' && *cmdline != '\t' && pos + 1 < outSize)
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out[pos++] = *cmdline++;
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}
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out[pos] = '\0';
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return pos != 0;
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}
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// ---------------------------------------------------------------------------
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// Run one command
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// ---------------------------------------------------------------------------
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static int runCommand(const char* cmd) {
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if (!cmd || *cmd == '\0') return 0;
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if (strcmp(cmd, "exit") == 0) return 1;
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if (strcmp(cmd, "help") == 0) { cmd_help(); return 0; }
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if (strcmp(cmd, "clear") == 0) { SysScreenClear(0); return 0; }
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if (strcmp(cmd, "crash") == 0) { *(int*)0 = 42; return 0; }
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if (strcmp(cmd, "mem") == 0) { cmd_mem(); return 0; }
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if (strcmp(cmd, "dir") == 0) { cmd_dir("."); return 0; }
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if (strncmp(cmd, "dir ", 4) == 0) { cmd_dir(cmd + 4); return 0; }
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if (strncmp(cmd, "cd ", 3) == 0) { if (set_cwd(cmd + 3) != 0) print("cd: failed\n"); return 0; }
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if (strncmp(cmd, "del ", 4) == 0) { delete_file(cmd + 4); return 0; }
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if (strncmp(cmd, "type ", 5) == 0) { cmd_type(cmd + 5); return 0; }
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if (strncmp(cmd, "write ", 6) == 0) { cmd_write(cmd + 6); return 0; }
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char program[MAX_CMD];
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if (!extractProgramPath(cmd, program, sizeof(program))) return 0;
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uint32_t hProc;
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if (create_process(program, &hProc, cmd) == 0) {
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SysWaitForProcess(hProc);
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SysCloseHandle(hProc);
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while (SysKbPoll()) (void)SysKbReadChar();
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} else { print("shell: launch failed\n"); }
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return 0;
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}
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int main(void) {
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const char* cmdline = SysGetPeb()->CommandLine.Data;
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char lineBuf[MAX_CMD];
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print("shell: command line: ");
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print(cmdline);
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print("\n");
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print("shell: ready\n");
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while (true) {
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print("> ");
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readLine(lineBuf, MAX_CMD);
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if (runCommand(trim(lineBuf))) break;
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}
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print("shell: goodbye\n");
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SysExitProcess(0);
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return 0;
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}
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