286 lines
9.2 KiB
C
286 lines
9.2 KiB
C
#include <stdint.h>
|
|
#include <stddef.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <ntlite/syscall.h>
|
|
|
|
#define MAX_CMD 256
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Output helpers
|
|
// ---------------------------------------------------------------------------
|
|
static void print(const char* s) { SYS_WRITE_CONSOLE_REQUEST req = { SysSvFromCstr(s) }; SysWriteConsole(&req); }
|
|
|
|
static uint32_t open_file(const char* path, uint32_t* handleOut) {
|
|
SYS_PATH_HANDLE_REQUEST req = { SysSvFromCstr(path), handleOut };
|
|
return SysOpenFile(&req);
|
|
}
|
|
|
|
static uint32_t create_file(const char* path, uint32_t* handleOut) {
|
|
SYS_PATH_HANDLE_REQUEST req = { SysSvFromCstr(path), handleOut };
|
|
return SysCreateFile(&req);
|
|
}
|
|
|
|
static uint32_t open_dir(const char* path, uint32_t* handleOut) {
|
|
SYS_PATH_HANDLE_REQUEST req = { SysSvFromCstr(path), handleOut };
|
|
return SysOpenDir(&req);
|
|
}
|
|
|
|
static uint32_t set_cwd(const char* path) {
|
|
SYS_PATH_REQUEST req = { SysSvFromCstr(path) };
|
|
return SysSetCwd(&req);
|
|
}
|
|
|
|
static uint32_t delete_file(const char* path) {
|
|
SYS_PATH_REQUEST req = { SysSvFromCstr(path) };
|
|
return SysDeleteFile(&req);
|
|
}
|
|
|
|
static uint32_t create_process(const char* path, uint32_t* handleOut, const char* cmdline) {
|
|
SYS_CREATE_PROCESS_REQUEST req = { SysSvFromCstr(path), SysSvFromCstr(cmdline), handleOut };
|
|
return SysCreateProcess(&req);
|
|
}
|
|
|
|
static void printUInt(uint32_t n) {
|
|
char buf[12]; int i = 0;
|
|
if (n == 0) { print("0"); return; }
|
|
while (n > 0) { buf[i++] = (char)('0' + n % 10); n /= 10; }
|
|
while (i > 0) { char c[2] = { buf[--i], '\0' }; print(c); }
|
|
}
|
|
|
|
static void printInt(int32_t n) {
|
|
if (n < 0) { print("-"); printUInt((uint32_t)-(n + 1) + 1); }
|
|
else { printUInt((uint32_t)n); }
|
|
}
|
|
|
|
static void printUInt64(uint64_t n) {
|
|
if (n == 0) { print("0"); return; }
|
|
char buf[20]; int i = 0;
|
|
while (n > 0) { buf[i++] = (char)('0' + (int)(n % 10)); n /= 10; }
|
|
while (i > 0) { char c[2] = { buf[--i], '\0' }; print(c); }
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Line editor
|
|
// ---------------------------------------------------------------------------
|
|
static void readLine(char* buf, int len) {
|
|
int pos = 0;
|
|
while (true) {
|
|
char c = SysKbReadChar();
|
|
if (!c) { SysYield(); continue; }
|
|
if (c == '\r' || c == '\n') { print("\n"); break; }
|
|
if ((c == '\b' || c == 127) && pos > 0) { pos--; print("\b \b"); continue; }
|
|
if (c < 0x20 || c == 127) continue;
|
|
if (pos < len - 1) { buf[pos++] = c; char echo[2] = {c, '\0'}; print(echo); }
|
|
}
|
|
buf[pos] = '\0';
|
|
}
|
|
|
|
static char* trim(char* s) {
|
|
while (*s == ' ') s++;
|
|
int len = (int)strlen(s);
|
|
while (len > 0 && s[len - 1] == ' ') len--;
|
|
s[len] = '\0';
|
|
return s;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Built-in commands
|
|
// ---------------------------------------------------------------------------
|
|
static void cmd_help() {
|
|
print("Available commands:\n"
|
|
" help - Show this list\n"
|
|
" mem - Show memory usage\n"
|
|
" dir [path] - List directory contents\n"
|
|
" cd <path> - Change directory\n"
|
|
" type <file> - Display file contents\n"
|
|
" del <file> - Delete a file\n"
|
|
" write <file> <tx> - Create a file with text\n"
|
|
" clear - Clear the screen\n"
|
|
" exit - Close the shell\n");
|
|
}
|
|
|
|
static void printSizeKiB(uint64_t bytes) {
|
|
printUInt64(bytes / 1024u);
|
|
print(" KiB");
|
|
}
|
|
|
|
static void cmd_mem(void) {
|
|
SYS_MEMORY_STATUS st;
|
|
if (SysGetMemoryStatus(&st) != 0) {
|
|
print("mem: failed\n");
|
|
return;
|
|
}
|
|
|
|
print("Memory Status:\n");
|
|
print(" Free physical: ");
|
|
printSizeKiB(st.FreePhysicalBytes);
|
|
print("\n Kernel pool: ");
|
|
printSizeKiB(st.KernelPoolBytes);
|
|
print("\n User heap: ");
|
|
printSizeKiB(st.UserHeapBytes);
|
|
print("\n");
|
|
}
|
|
|
|
static void cmd_write(const char* args) {
|
|
char filename[MAX_CMD]; int i = 0;
|
|
while (args[i] != ' ' && args[i] != '\0' && i < MAX_CMD - 1) {
|
|
filename[i] = args[i]; i++;
|
|
}
|
|
filename[i] = '\0';
|
|
if (args[i] == '\0' || args[i+1] == '\0') { print("write: usage: write <filename> <text>\n"); return; }
|
|
uint32_t hFile;
|
|
if (create_file(filename, &hFile) != 0) { print("write: could not create file\n"); return; }
|
|
size_t written;
|
|
SysWriteFile(hFile, args + i + 1, strlen(args + i + 1), &written);
|
|
SysCloseHandle(hFile);
|
|
print("File written successfully.\n");
|
|
}
|
|
|
|
static void cmd_dir(const char* path) {
|
|
uint32_t hDir;
|
|
const char* target = (path && *path != '\0') ? path : ".";
|
|
|
|
if (open_dir(target, &hDir) != 0) {
|
|
print("dir: failed to open directory\n");
|
|
return;
|
|
}
|
|
|
|
SYS_DIR_ENTRY ke;
|
|
while (SysReadDir(hDir, &ke) == 0) {
|
|
// Corrected Attribute Check: 0x10 is the Directory bit in FAT
|
|
if (ke.Attr & 0x10) {
|
|
print("<DIR> ");
|
|
} else {
|
|
print(" ");
|
|
}
|
|
|
|
print(ke.Name);
|
|
|
|
// Optional: print file size for non-directories
|
|
if (!(ke.Attr & 0x10)) {
|
|
print(" (");
|
|
printUInt(ke.FileSize);
|
|
print(" bytes)");
|
|
}
|
|
|
|
print("\n");
|
|
}
|
|
SysCloseHandle(hDir);
|
|
}
|
|
|
|
static void cmd_type(const char* filename) {
|
|
uint32_t hFile;
|
|
if (open_file(filename, &hFile) != 0) { print("type: cannot open file\n"); return; }
|
|
char buffer[512]; size_t bytesRead;
|
|
while (SysReadFile(hFile, buffer, sizeof(buffer) - 1, &bytesRead) == 0 && bytesRead > 0) {
|
|
buffer[bytesRead] = '\0'; print(buffer);
|
|
}
|
|
SysCloseHandle(hFile); print("\n");
|
|
}
|
|
|
|
|
|
static bool extractProgramPath(const char* cmdline, char* out, size_t outSize) {
|
|
if (!cmdline || !out || outSize == 0) return false;
|
|
|
|
while (*cmdline == ' ' || *cmdline == '\t') cmdline++;
|
|
if (*cmdline == '\0') return false;
|
|
|
|
size_t pos = 0;
|
|
if (*cmdline == '"') {
|
|
cmdline++;
|
|
while (*cmdline && *cmdline != '"' && pos + 1 < outSize)
|
|
out[pos++] = *cmdline++;
|
|
} else {
|
|
while (*cmdline && *cmdline != ' ' && *cmdline != '\t' && pos + 1 < outSize)
|
|
out[pos++] = *cmdline++;
|
|
}
|
|
|
|
out[pos] = '\0';
|
|
return pos != 0;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Run one command
|
|
// ---------------------------------------------------------------------------
|
|
static int runCommand(const char* cmd) {
|
|
if (!cmd || *cmd == '\0') return 0;
|
|
if (strcmp(cmd, "exit") == 0) return 1;
|
|
if (strcmp(cmd, "help") == 0) { cmd_help(); return 0; }
|
|
if (strcmp(cmd, "clear") == 0) { SysScreenClear(0); return 0; }
|
|
if (strncmp(cmd, "crash", 5) == 0) {
|
|
// Check the sub-option trailing "crash " (offset 6)
|
|
if (strcmp(cmd + 6, "void") == 0) {
|
|
// Jumping into the void
|
|
void (*invalid_func)(void) = NULL;
|
|
invalid_func();
|
|
return 0;
|
|
}
|
|
else if (strcmp(cmd + 6, "noncanonical") == 0) {
|
|
// Non-canonical pointer dereference
|
|
volatile int *ptr = (volatile int*)0x4242424242424242ULL;
|
|
*ptr = 1337;
|
|
return 0;
|
|
}
|
|
else if (strcmp(cmd + 6, "ud2") == 0) {
|
|
__ud2();
|
|
return 0;
|
|
}
|
|
else if (strcmp(cmd + 6, "nx") == 0) {
|
|
// NX / DEP Violation
|
|
unsigned char code[] = { 0xC3 };
|
|
void (*execute_stack)(void) = (void (*)(void))code;
|
|
execute_stack();
|
|
return 0;
|
|
}
|
|
else if (strcmp(cmd + 6, "divzero") == 0) {
|
|
// Division by zero
|
|
volatile int zero = 0;
|
|
volatile int result = 1 / zero;
|
|
(void)result;
|
|
return 0;
|
|
}
|
|
else {
|
|
// Default fallback if just "crash" or an unknown sub-option is passed
|
|
*(volatile int*)0 = 42;
|
|
return 0;
|
|
}
|
|
}
|
|
if (strcmp(cmd, "mem") == 0) { cmd_mem(); return 0; }
|
|
if (strcmp(cmd, "dir") == 0) { cmd_dir("."); return 0; }
|
|
if (strncmp(cmd, "dir ", 4) == 0) { cmd_dir(cmd + 4); return 0; }
|
|
if (strncmp(cmd, "cd ", 3) == 0) { if (set_cwd(cmd + 3) != 0) print("cd: failed\n"); return 0; }
|
|
if (strncmp(cmd, "del ", 4) == 0) { delete_file(cmd + 4); return 0; }
|
|
if (strncmp(cmd, "type ", 5) == 0) { cmd_type(cmd + 5); return 0; }
|
|
if (strncmp(cmd, "write ", 6) == 0) { cmd_write(cmd + 6); return 0; }
|
|
|
|
char program[MAX_CMD];
|
|
if (!extractProgramPath(cmd, program, sizeof(program))) return 0;
|
|
|
|
uint32_t hProc;
|
|
if (create_process(program, &hProc, cmd) == 0) {
|
|
SysWaitForProcess(hProc);
|
|
SysCloseHandle(hProc);
|
|
while (SysKbPoll()) (void)SysKbReadChar();
|
|
} else { print("shell: launch failed\n"); }
|
|
return 0;
|
|
}
|
|
|
|
int main(void) {
|
|
const char* cmdline = SysGetPeb()->CommandLine.Data;
|
|
char lineBuf[MAX_CMD];
|
|
|
|
print("shell: command line: ");
|
|
print(cmdline);
|
|
print("\n");
|
|
print("shell: ready\n");
|
|
while (true) {
|
|
print("> ");
|
|
readLine(lineBuf, MAX_CMD);
|
|
if (runCommand(trim(lineBuf))) break;
|
|
}
|
|
print("shell: goodbye\n");
|
|
SysExitProcess(0);
|
|
return 0;
|
|
}
|