Implement filesystem component

Makefile

@@ -1,5 +1,5 @@
 CC=gcc
-CFLAGS=-g -std=c99 -Isrc/lib/lua -Iinclude
+CFLAGS=-g -std=gnu99 -Isrc/lib/lua -Iinclude
 
 BUILD = bin/
 SOURCE = src/c/

include/luares.h

@@ -5,6 +5,7 @@ extern char lua_component[];
 extern char lua_computer[];
 extern char lua_eepromDefault[];
 extern char lua_eeprom[];
+extern char lua_filesystem[];
 extern char lua_init[];
 extern char lua_sandbox[];
 extern char lua_textgpu[];

src/c/lnative.c

@@ -1,19 +1,279 @@
+#define _XOPEN_SOURCE 500
+
 #include "lupi.h"
 #include <lua.h>
 #include <lualib.h>
 #include <lauxlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/statvfs.h>
 #include <string.h>
+#include <stdlib.h>
 #include <unistd.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <ftw.h>
+#include <limits.h>
+#include <linux/kd.h>
 
 static int l_sleep (lua_State *L) {
-  int t = lua_tonumber(L, 1);
+  unsigned int t = lua_tonumber(L, 1);
   usleep(t);
   return 0;
 }
 
+// Filesystem methods
+static int l_fs_exists (lua_State *L) {
+  const char* fname = lua_tostring(L, 1);
+  if( access( fname, F_OK ) != -1 ) {
+    lua_pushboolean(L, 1);
+  } else {
+    lua_pushboolean(L, 0);
+  }
+  return 1;
+}
+
+static int l_fs_mkdir (lua_State *L) {
+  const char* fname = lua_tostring(L, 1);
+  if( mkdir( fname, 0755 ) != -1 ) {
+    lua_pushboolean(L, 1);
+  } else {
+    lua_pushboolean(L, 0);
+  }
+  return 1;
+}
+
+static int l_fs_isdir (lua_State *L) {
+  const char* fname = lua_tostring(L, 1);
+  struct stat s;
+  int err = stat(fname, &s);
+  if(-1 == err) {
+    lua_pushboolean(L, 0);
+  } else {
+    if(S_ISDIR(s.st_mode)) {
+      lua_pushboolean(L, 1);
+    } else {
+      lua_pushboolean(L, 0);
+    }
+  }
+  return 1;
+}
+
+static int l_fs_spaceUsed (lua_State *L) {
+  const char* fname = lua_tostring(L, 1);
+  struct statvfs s;
+  if( statvfs(fname, &s) != -1 ) {
+    lua_pushnumber(L, s.f_bsize * s.f_bfree);
+  } else {
+    lua_pushnumber(L, -1);
+  }
+  return 1;
+}
+
+static int l_fs_open (lua_State *L) {
+  const char* fname = lua_tostring(L, 1);
+  const char* mode = lua_tostring(L, 2);
+  int m = 0;
+  if(mode[0] == 'r') m = O_RDONLY;
+  else if(mode[0] == 'w') m = O_WRONLY | O_CREAT /*| O_DIRECT*/;
+  else if(mode[0] == 'a') m = O_WRONLY | O_APPEND | O_CREAT /*| O_DIRECT*/;
+  else return 0;
+  int fd = open(fname, m, 644);
+  if(fd == -1) return 0;
+
+  lua_pushnumber(L, fd);
+  return 1;
+}
+
+static int l_fs_seek (lua_State *L) {
+  int fd = lua_tonumber(L, 1);
+  int whence = lua_tonumber(L, 2);
+  long offset = lua_tonumber(L, 3);
+
+  int w = 0;
+  if(whence == 0) w = SEEK_CUR;
+  else if(whence == 1) w = SEEK_SET;
+  else if(whence == 2) w = SEEK_END;
+  else return 0;
+  int res = lseek(fd, w, offset);
+  lua_pushnumber(L, res);
+  return 1;
+}
+
+static int l_fs_write (lua_State *L) {
+  int fd = lua_tonumber(L, 1);
+  size_t len = 0;
+  const char* data = lua_tolstring(L, 2, &len);
+
+  //TODO: May not all data be written?
+  if(write(fd, data, len) == -1) {
+    lua_pushboolean(L, 0);
+  } else {
+    lua_pushboolean(L, 1);
+  }
+  return 1;
+}
+
+static int l_fs_spaceTotal (lua_State *L) {
+  const char* fname = lua_tostring(L, 1);
+  struct statvfs s;
+  if( statvfs(fname, &s) != -1 ) {
+    lua_pushnumber(L, s.f_frsize * s.f_blocks);
+  } else {
+    lua_pushnumber(L, -1);
+  }
+  return 1;
+}
+
+static int l_fs_rename (lua_State *L) {
+  const char* from = lua_tostring(L, 1);
+  const char* to = lua_tostring(L, 1);
+  if( rename( from, to ) != -1 ) {
+    lua_pushboolean(L, 1);
+  } else {
+    lua_pushboolean(L, 0);
+  }
+  return 1;
+}
+
+static int l_fs_list (lua_State *L) {
+  const char* path = lua_tostring(L, 1);
+  
+  DIR *dir;
+  struct dirent *ent;
+  if ((dir = opendir(path)) != NULL) {
+    lua_newtable(L);
+    int n = 1;
+    while ((ent = readdir(dir)) != NULL) { //TODO: Check if it should be freed
+      lua_pushstring(L, ent->d_name);
+      lua_rawseti(L, -2, n++);
+    }
+    closedir(dir);
+  } else {
+    return 0;
+  }
+  return 1;
+}
+
+static int l_fs_lastModified (lua_State *L) {
+  const char* path = lua_tostring(L, 1);
+  struct stat s;
+  if( stat(path, &s) != -1 ) {
+    lua_pushnumber(L, s.st_mtime);
+  } else {
+    return 0; //TODO: No error?
+  }
+  return 1;
+}
+
+static int rm(const char *path, const struct stat *s, int flag, struct FTW *f) {
+    int status;
+    int (*rm_func)(const char *);
+
+    switch(flag) {
+      default:     rm_func = unlink; break;
+      case FTW_DP: rm_func = rmdir;
+    }
+    if(status = rm_func(path), status != 0)
+        perror(path);
+    return status;
+}
+
+static int l_fs_remove (lua_State *L) {
+  const char* path = lua_tostring(L, 1);
+
+  if( nftw( path, rm, FOPEN_MAX, FTW_DEPTH )) {
+    lua_pushboolean(L, 0);
+  } else {
+    lua_pushboolean(L, 1);
+  }
+  return 1;
+}
+
+static int l_fs_close (lua_State *L) {
+  int fd = lua_tonumber(L, 1);
+
+  if(close(fd) == -1) {
+    lua_pushboolean(L, 0);
+  } else {
+    lua_pushboolean(L, 1);
+  }
+  return 1;
+}
+
+static int l_fs_size (lua_State *L) {
+  const char* path = lua_tostring(L, 1);
+  struct stat s;
+  if( stat(path, &s) != -1 ) {
+    lua_pushnumber(L, s.st_size);
+  } else {
+    return 0; //TODO: No error?
+  }
+  return 1;
+}
+
+static int l_fs_read (lua_State *L) {
+  int fd = lua_tonumber(L, 1);
+  int count = lua_tonumber(L, 2);
+  void* buf = malloc(count);
+  size_t res = read(fd, buf, count);
+  if(res != -1) {
+    lua_pushlstring(L, buf, res);
+    free(buf);
+    return 1;
+  }
+  free(buf);
+  return 0;
+}
+
+#ifndef CLOCK_TICK_RATE
+#define CLOCK_TICK_RATE 1193180
+#endif
+
+//Filesystem end
+static int l_beep (lua_State *L) {
+  int freq = lua_tonumber(L, 1);
+  int btime = lua_tonumber(L, 2);
+  int console_fd = -1;
+
+  if((console_fd = open("/dev/console", O_WRONLY)) == -1) {
+    //fprintf(stderr, "Could not open /dev/console for writing.\n");
+    printf("\a");
+    return 0;
+  }
+
+  if(ioctl(console_fd, KIOCSOUND, (int)(CLOCK_TICK_RATE/freq)) < 0) {
+    printf("\a");
+    return 0;
+  }
+
+  usleep(1000 * btime);
+  ioctl(console_fd, KIOCSOUND, 0);
+  close(console_fd);
+  return 0;
+}
+
 void luanative_start(lua_State *L) {
   lua_createtable (L, 0, 1);
-  pushctuple(L, "sleep", l_sleep);
   
+  pushctuple(L, "sleep", l_sleep);
+
+  pushctuple(L, "fs_exists", l_fs_exists);
+  pushctuple(L, "fs_mkdir", l_fs_mkdir);
+  pushctuple(L, "fs_isdir", l_fs_isdir);
+  pushctuple(L, "fs_spaceUsed", l_fs_spaceUsed);
+  pushctuple(L, "fs_open", l_fs_open);
+  pushctuple(L, "fs_seek", l_fs_seek);
+  pushctuple(L, "fs_write", l_fs_write);
+  pushctuple(L, "fs_spaceTotal", l_fs_spaceTotal);
+  pushctuple(L, "fs_rename", l_fs_rename);
+  pushctuple(L, "fs_lastModified", l_fs_lastModified);
+  pushctuple(L, "fs_remove", l_fs_remove);
+  pushctuple(L, "fs_close", l_fs_close);
+  pushctuple(L, "fs_size", l_fs_size);
+  pushctuple(L, "fs_read", l_fs_read);
+
+  pushctuple(L, "beep", l_beep);
+
   lua_setglobal(L, "native");
 }

src/c/modules.c

@@ -13,6 +13,7 @@ void setup_modules(lua_State *L) {
   pushstuple(L, "computer", lua_computer);
   pushstuple(L, "eeprom", lua_eeprom);
   pushstuple(L, "eepromDefault", lua_eepromDefault);
+  pushstuple(L, "filesystem", lua_filesystem);
   pushstuple(L, "sandbox", lua_sandbox);
   pushstuple(L, "textgpu", lua_textgpu);
   pushstuple(L, "color", lua_util_color);

src/c/run.c

@@ -5,6 +5,15 @@
 #include <lauxlib.h>
 #include <stdlib.h>
 
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/statvfs.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
 void run_init() {
   lua_State *L;
   L = luaL_newstate();
@@ -14,7 +23,8 @@ void run_init() {
   luanative_start (L);
   termutils_start (L);
 
-  int status = luaL_loadstring(L, lua_init);
+  //int status = luaL_loadstring(L, lua_init);
+  int status = luaL_loadbuffer(L, lua_init, strlen(lua_init), "=INIT");
   if (status) {
     fprintf(stderr, "Couldn't load init: %s\n", lua_tostring(L, -1));
     exit(1);

src/lua/core/boot.lua

@@ -4,39 +4,41 @@ function boot.boot()
   local gpu = modules.component.api.proxy(modules.component.api.list("gpu", true)())
   local w, h = gpu.getResolution()
 
-  local function bsod(err)
+  local function bsod(...)
     gpu.setBackground(0x0000FF)
     gpu.setForeground(0xFFFFFF)
-    gpu.fill(0, 0, w, h, " ")
+    gpu.fill(1, 1, w, h, " ")
     gpu.set(2, 2, "CRITICAL ERROR OCCURED")
-    gpu.set(2, 3, "Lua BIOS Has failed:")
-    gpu.set(2, 5, tostring(err))
-    io.flush()
-    native.sleep(2000000)
+    gpu.set(2, 3, "Lua BIOS has failed:")
+    for n, v in pairs({...}) do
+      gpu.set(2, 4 + n, tostring(v))
+    end
+    gpu.set(2, h-1, "SYSTEM WILL STOP")
     gpu.setForeground(0xFFFFFF)
     gpu.setBackground(0x000000)
+
+    native.sleep(4000000)
+    os.exit(1)
   end
 
-  print("r= " .. tostring(w) .. " " .. tostring(h))
-  gpu.fill(0, 0, w, h, " ")
-  gpu.set(10, 5, "HHHHHHHHHHHHH")
-  gpu.set(11, 11, "VVVVVVVVVVVVVVVVV", true)
-  print("LuPI L2 INIT")
-
+  gpu.fill(1, 1, w, h, " ")
+  gpu.set(1, h - 2, "LuPI L2 INIT")
   local code = modules.component.api.invoke(modules.component.api.list("eeprom", true)(), "get")
   if not code then
-    print("No bootcode")
-    error("No bootcode")
+    bsod("No bootcode")
   end
-  local f, reason = load(code, "=BIOS", nil, modules.sandbox)
+  local f, reason = load(code, "=USERBIOS", nil, modules.sandbox)
   if not f then
-    print(reason)
+    bsod(reason)
   else
-    local e, reason = pcall(f)
-    if not e then
-      bsod(reason)      
-    end
-    print("System quit, Panic")
+    xpcall(f, function(e)
+      local trace = {}
+      for s in string.gmatch(debug.traceback(e, 2), "[^\r\n]+") do
+        trace[#trace + 1] = s
+      end
+      bsod("System crashed", "Stack traceback:", table.unpack(trace))
+    end)
+    bsod("System quit")
   end
 end
 

src/lua/core/component.lua

@@ -35,7 +35,7 @@ function api.register(address, ctype, proxy, doc)
     end
   end
   modules.computer.api.pushSignal("component_added", address, ctype)
-  return true
+  return address
 end
 
 function api.unregister(address)
@@ -65,7 +65,7 @@ function api.invoke(address, method, ...)
     error("No such component")
   end
   if not components[address].rawproxy[method] then
-    error("No such method")
+    error("No such method: " .. tostring(components[address].type) .. "." .. tostring(method))
   end
   return components[address].rawproxy[method](...)
 end

src/lua/core/computer.lua

@@ -10,4 +10,10 @@ function api.pushSignal(...)
   --FIXME: ASAP: Implement
 end
 
+function api.beep(freq, time)
+	if not freq then freq = 1000 end
+	if not time then time = 0.2 end
+	native.beep(freq, time * 1000)
+end
+
 return computer

src/lua/core/filesystem.lua

@@ -0,0 +1,158 @@
+--Native side at lnative.c
+
+local filesystem = {}
+
+local function segments(path)
+  path = path:gsub("\\", "/")
+  repeat local n; path, n = path:gsub("//", "/") until n == 0
+  local parts = {}
+  for part in path:gmatch("[^/]+") do
+    table.insert(parts, part)
+  end
+  local i = 1
+  while i <= #parts do
+    if parts[i] == "." then
+      table.remove(parts, i)
+    elseif parts[i] == ".." then
+      table.remove(parts, i)
+      i = i - 1
+      if i > 0 then
+        table.remove(parts, i)
+      else
+        i = 1
+      end
+    else
+      i = i + 1
+    end
+  end
+  return parts
+end
+
+local function canonical(path)
+  local result = table.concat(segments(path), "/")
+  if string.sub(path, 1, 1) == "/" then
+    return "/" .. result
+  else
+    return result
+  end
+end
+
+local function concat(pathA, pathB, ...)
+  checkArg(1, pathA, "string")
+  checkArg(2, pathB, "string", "nil")
+  local function _concat(n, a, b, ...)
+    if not b then
+      return a
+    end
+    checkArg(n, b, "string")
+    return _concat(n + 1, a .. "/" .. b, ...)
+  end
+  return canonical(_concat(2, pathA, pathB, ...))
+end
+
+function filesystem.register(basePath)
+  checkArg(1, basePath, "string")
+
+  if not native.fs_exists(basePath) then
+    native.fs_mkdir(basePath)
+  end
+  if not native.fs_isdir(basePath) then
+    error("Filesystem root is not a directory!")
+  end
+  local function realpath(path)
+    checkArg(1, path, "string")
+    return concat(basePath, path)
+  end
+
+  --TODO: checkArg all
+  local fs = {}
+  function fs.spaceUsed()
+    return native.fs_spaceUsed(basePath)
+  end
+  function fs.open(path, mode)
+    checkArg(1, path, "string")
+    checkArg(2, path, "string", "nil")
+    local m = "r"
+    if mode == "a" then m = "a"
+    elseif mode == "w" then m = "w" end
+    local fd = native.fs_open(realpath(path), m)
+    if not fd then
+      return nil, path
+    end
+    return fd
+  end
+  function fs.seek(handle, whence, offset) --TODO: Test
+    checkArg(1, handle, "number")
+    checkArg(2, whence, "string")
+    checkArg(3, offset, "number")
+    local w = 0
+    if whence == "cur" then w = 0
+    elseif whence == "set" then w = 1
+    elseif whence == "end" then w = 2
+    else error("Invalid whence") end
+    return native.fs_seek(handle, w, offset or 0)
+  end
+  function fs.makeDirectory(path) --TODO: check if creates parrent dirs
+    checkArg(1, path, "string")
+    return native.fs_mkdir(realpath(path))
+  end
+  function fs.exists(path)
+    checkArg(1, path, "string")
+    return native.fs_exists(realpath(path))
+  end
+  function fs.isReadOnly()
+    return false --TODO: Implement
+  end
+  function fs.write(handle, value) --TODO: check behaviour on invalid FDs
+    checkArg(1, handle, "number")
+    checkArg(2, value, "string")
+    return native.fs_write(handle, value)
+  end
+  function fs.spaceTotal()
+    return native.fs_spaceTotal(basePath)
+  end
+  function fs.isDirectory(path)
+    checkArg(1, path, "string")
+    return native.fs_isdir(realpath(path))
+  end
+  function fs.rename(from, to)
+    checkArg(1, from, "string")
+    checkArg(2, to, "string")
+    return native.fs_rename(realpath(from), realpath(to))
+  end
+  function fs.list(path)
+    checkArg(1, path, "string")
+    return native.fs_list(realpath(path)) --TODO: Test, check if dirs get / at end
+  end
+  function fs.lastModified(path)
+    checkArg(1, path, "string")
+    return native.fs_lastModified(realpath(path))
+  end
+  function fs.getLabel()
+    return --TODO: Implement, use real labels
+  end
+  function fs.remove(path) --TODO: TEST!!
+    checkArg(1, path, "string")
+    return native.fs_remove(realpath(path))
+  end
+  function fs.close(handle)
+    checkArg(1, handle, "number")
+    return native.fs_close()
+  end
+  function fs.size(path)
+    checkArg(1, path, "string")
+    return native.fs_size(realpath(path))
+  end
+  function fs.read(handle, count) --FIXME: Hudgeread, fix in general
+    checkArg(1, handle, "number")
+    checkArg(2, count, "number")
+    return native.fs_read(handle, count)
+  end
+  function fs.setLabel(value)
+    checkArg(1, value, "number")
+    return value --TODO: Implement, use real labels
+  end
+  return modules.component.api.register(nil, "filesystem", fs)
+end
+
+return filesystem

src/lua/core/init.lua

@@ -18,6 +18,7 @@ end
 
 print("LuPI L1 INIT")
 modules = {}
+deadhooks = {}
 
 local function loadModule(name)
   print("LuPI L1 INIT > Load module > " .. name)
@@ -26,7 +27,7 @@ local function loadModule(name)
   if not moduleCode[name] then
     error("No code for module " .. tostring(name))
   end
-  local code, reason = load(moduleCode[name])
+  local code, reason = load(moduleCode[name], "=Module "..name)
   if not code then
     print("Failed loading module " .. name .. ": " .. reason)
   else
@@ -34,28 +35,47 @@ local function loadModule(name)
   end
 end
 
---Load modules
---Utils
-loadModule("random")
-loadModule("color")
+function main()
+  --Load modules
+  --Utils
+  loadModule("random")
+  loadModule("color")
 
---Core
-loadModule("component")
-loadModule("computer")
+  --Core
+  loadModule("component")
+  loadModule("computer")
 
---Components
-loadModule("eeprom")
-loadModule("textgpu")
+  --Components
+  loadModule("eeprom")
+  loadModule("textgpu")
+  loadModule("filesystem")
 
---Userspace
-loadModule("sandbox")
-loadModule("boot")
+  --Userspace
+  loadModule("sandbox")
+  loadModule("boot")
 
---Setup core modules
-modules.component.prepare()
-modules.computer.prepare()
+  --Setup core modules
+  modules.component.prepare()
+  modules.computer.prepare()
 
-modules.eeprom.register()
-modules.textgpu.start()
+  modules.eeprom.register()
+  modules.filesystem.register("root")
+  modules.textgpu.start()
 
-modules.boot.boot()
+  modules.boot.boot()
+end
+
+local state, cause = pcall(main)
+if not state then
+  print("LuPI finished with following error:")
+  print(cause)
+end
+
+print("Running shutdown hooks")
+for k, hook in ipairs(deadhooks) do
+  local state, cause = pcall(hook)
+  if not state then
+    print("Shutdown hook with following error:")
+    print(cause)
+  end
+end

src/lua/core/sandbox.lua

@@ -160,7 +160,8 @@ sandbox = {
     len = utf8.len,
     offset = utf8.offset
   },
-  checkArg = checkArg
+  checkArg = checkArg,
+  og = _G
 }
 
 sandbox._G = sandbox

src/lua/core/textgpu.lua

@@ -25,7 +25,8 @@ function textgpu.start()
       return --TODO: Maybe?
     end
     background = modules.color.nearest(color, mapping)
-    io.write("\x1b[4" .. background .. "m")
+    io.write("\x1b[4" .. math.floor(background) .. "m")
+    io.flush()
   end
   function gpu.setForeground(color, isPaletteIndex)
     checkArg(1, color, "number")
@@ -33,8 +34,9 @@ function textgpu.start()
     if isPaletteIndex then
       return --TODO: Maybe?
     end
-    background = modules.color.nearest(color, mapping)
-    io.write("\x1b[3" .. background .. "m")
+    foreground = modules.color.nearest(color, mapping)
+    io.write("\x1b[3" .. math.floor(foreground) .. "m")
+    io.flush()
   end
   function gpu.getBackground()
     return mapping[background], false
@@ -79,6 +81,8 @@ function textgpu.start()
     checkArg(2, y, "number")
     checkArg(3, value, "string")
     checkArg(4, vertical, "boolean", "nil")
+    x = math.floor(x)
+    y = math.floor(y)
     if not vertical then
       io.write("\x1b[" .. y .. ";" .. x .. "H" .. value)
     else
@@ -87,6 +91,7 @@ function textgpu.start()
         io.write(c .. "\x1b[D\x1b[B")
       end)
     end
+    io.flush()
     return true
   end
   function gpu.copy(x, y, w, h, tx, ty)
@@ -112,10 +117,15 @@ function textgpu.start()
     return true
   end
 
+  io.write("\x1b[?25l") --Disable cursor
   gpu.setForeground(0xFFFFFF)
   gpu.setBackground(0x000000)
 
   modules.component.api.register(nil, "gpu", gpu)
+
+  deadhooks[#deadhooks + 1] = function()
+    io.write("\x1b[?25h") --Enable cursor on quit
+  end
 end
 
 return textgpu