Lua shell :)

1 files changed, 221 insertions, 0 deletions

diff --git a/src/sysbin/lx/lxsyslib.c b/src/sysbin/lx/lxsyslib.c
new file mode 100644
index 0000000..5bfec3e
--- /dev/null
+++ b/src/sysbin/lx/lxsyslib.c
@@ -0,0 +1,221 @@
+/*
+** Lua eXtended system library
+*/
+
+#define lxsyslib_c
+#define LUA_LIB
+
+#include <lua/lprefix.h>
+
+
+#include <errno.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include <lua/lua.h>
+
+#include <lua/lauxlib.h>
+#include <lua/lualib.h>
+
+#include "lxlib.h"
+
+
+
+static void setintfield (lua_State *L, const char *key, int value) {
+  lua_pushinteger(L, value);
+  lua_setfield(L, -2, key);
+}
+
+static void setstrfield (lua_State *L, const char *key, const char* value) {
+  lua_pushstring(L, value);
+  lua_setfield(L, -2, key);
+}
+
+
+static int sys_dbg_print(lua_State *L) {
+  const char *str = luaL_checkstring(L, 1);
+  sc_dbg_print(str);
+  return 0;
+}
+
+static int sys_yield(lua_State *L) {
+  sc_yield();
+  return 0;
+}
+
+static int sys_exit(lua_State *L) {
+  int code = luaL_checkinteger(L, 1);
+  sc_exit(code);
+  return 0;
+}
+
+static int sys_usleep(lua_State *L) {
+  int usecs = luaL_checkinteger(L, 1);
+  sc_usleep(usecs);
+  return 0;
+}
+
+/*
+    Missing syscalls :
+    - sys_new_thread, exit_thread -> into specific threading library
+    - mmap, mmap_file, mchmap, munmap -> into specific memory-related library ??
+*/
+
+static int sys_create(lua_State *L) {
+  const char *name = luaL_checkstring(L, 1);
+  int type = luaL_checkinteger(L, 2);
+  lua_pushboolean(L, sc_create(name, type));
+  return 1;
+}
+
+static int sys_delete(lua_State *L) {
+  const char *name = luaL_checkstring(L, 1);
+  lua_pushboolean(L, sc_delete(name));
+  return 1;
+}
+
+static int sys_move(lua_State *L) {
+  const char *oldname = luaL_checkstring(L, 1);
+  const char *newname = luaL_checkstring(L, 2);
+  lua_pushboolean(L, sc_move(oldname, newname));
+  return 1;
+}
+
+static int sys_stat(lua_State *L) {
+  const char* name = luaL_checkstring(L, 1);
+  stat_t s;
+  if (sc_stat(name, &s)) {
+    lua_createtable(L, 0, 3);
+    setintfield(L, "type", s.type);
+    setintfield(L, "access", s.access);
+    setintfield(L, "size", s.size);
+  } else {
+    lua_pushnil(L);
+  }
+  return 1;
+}
+
+
+static int sys_open(lua_State *L) {
+  const char* name = luaL_checkstring(L, 1);
+  int mode = luaL_checkinteger(L, 2);
+  fd_t fh = sc_open(name, mode);
+  if (fh) {
+    lua_pushinteger(L, fh);
+  } else {
+    lua_pushnil(L);
+  }
+  return 1;
+}
+
+static int sys_close(lua_State *L) {
+  int fd = luaL_checkinteger(L, 1);
+  sc_close(fd);
+  return 0;
+}
+
+static int sys_read(lua_State *L) {
+  int fd = luaL_checkinteger(L, 1);
+  int offset = luaL_checkinteger(L, 2);
+  int len = luaL_checkinteger(L, 3);
+
+  luaL_Buffer b;
+  char* bufptr = luaL_buffinitsize(L, &b, len);
+  int ret = sc_read(fd, offset, len, bufptr);
+
+  luaL_pushresultsize(&b, ret);
+  lua_pushinteger(L, ret);
+  return 2;
+}
+
+static int sys_write(lua_State *L) {
+  int fd = luaL_checkinteger(L, 1);
+  int offset = luaL_checkinteger(L, 2);
+  const char* str = luaL_checkstring(L, 3);
+  int len = luaL_len(L, 3);
+
+  int ret = sc_write(fd, offset, len, str);
+  lua_pushinteger(L, ret);
+  return 1;
+}
+
+static int sys_readdir(lua_State *L) {
+  int fd = luaL_checkinteger(L, 1);
+  int ent_no = luaL_checkinteger(L, 2);
+
+  dirent_t d;
+  bool ret = sc_readdir(fd, ent_no, &d);
+  if (ret) {
+    lua_createtable(L, 0, 4);
+    setstrfield(L, "name", d.name);
+    setintfield(L, "type", d.st.type);
+    setintfield(L, "access", d.st.access);
+    setintfield(L, "size", d.st.size);
+  } else {
+    lua_pushnil(L);
+  }
+  return 1;
+}
+
+static int sys_stat_open(lua_State *L) {
+  int fd = luaL_checkinteger(L, 1);
+  stat_t s;
+  if (sc_stat_open(fd, &s)) {
+    lua_createtable(L, 0, 3);
+    setintfield(L, "type", s.type);
+    setintfield(L, "access", s.access);
+    setintfield(L, "size", s.size);
+  } else {
+    lua_pushnil(L);
+  }
+  return 1;
+}
+
+static int sys_ioctl(lua_State *L) {
+  // TODO
+  return 0;
+}
+
+static int sys_fctl(lua_State *L) {
+  // TODO
+  return 0;
+}
+
+static int sys_select(lua_State *L) {
+  // TODO
+  return 0;
+}
+
+
+static const luaL_Reg syslib[] = {
+  {"dbg_print", sys_dbg_print},
+  {"yield",     sys_yield},
+  {"exit",      sys_exit},
+  {"usleep",    sys_usleep},
+  {"create",    sys_create},
+  {"delete",    sys_delete},
+  {"move",      sys_move},
+  {"stat",      sys_stat},
+  {"open",      sys_open},
+  {"close",     sys_close},
+  {"read",      sys_read},
+  {"write",     sys_write},
+  {"readdir",   sys_readdir},
+  {"stat_open", sys_stat_open},
+
+  {NULL, NULL}
+};
+
+/* }====================================================== */
+
+
+
+LUAMOD_API int lx_open_sys (lua_State *L) {
+  luaL_newlib(L, syslib);
+  return 1;
+}
+
+
+/* vim: set sts=2 ts=2 sw=2 tw=0 et :*/