int
grub_command_execute (char *cmdline, int interactive)
{
auto grub_err_t cmdline_get (char **s);
grub_err_t cmdline_get (char **s)
{
*s = grub_malloc (GRUB_MAX_CMDLINE);
*s[0] = '\0';
return grub_cmdline_get (">", *s, GRUB_MAX_CMDLINE, 0, 1);
}
static grub_err_t
interactive (void)
{
const char *ps1 = "lua> ";
const char *ps2 = "lua>> ";
const char *prompt = ps1;
char *line;
char *chunk = NULL;
size_t len;
size_t oldlen = 0;
int r;
grub_printf ("%s", N_ ("Welcome to lua, press the escape key to exit."));
while ((line = grub_cmdline_get (prompt)) != NULL)
{
/* len = lenght of chunk + line + newline character */
len = oldlen + grub_strlen (line) + 1;
chunk = grub_realloc (chunk, len + 1);
grub_strcpy (chunk + oldlen , line);
chunk[len - 1] = '\n';
chunk[len] = '\0';
grub_free (line);
r = luaL_loadbuffer (state, chunk, len, "stdin");
if (!r)
{
/* No error: Execute this chunk and prepare to read another */
r = lua_pcall (state, 0, 0, 0);
if (r)
{
handle_lua_error ("Lua");
grub_print_error ();
}
grub_free (chunk);
chunk = NULL;
len = 0;
prompt = ps1;
}
else if (incomplete (state, r))
{
/* Chunk is incomplete, try reading another line */
prompt = ps2;
}
else if (r == LUA_ERRSYNTAX)
{
handle_lua_error ("Lua");
grub_print_error ();
/* This chunk is garbage, try starting another one */
grub_free (chunk);
chunk = NULL;
len = 0;
prompt = ps1;
}
else
{
/* Handle errors other than syntax errors (out of memory, etc.) */
grub_free (chunk);
handle_lua_error ("Lua parser failed");
return grub_errno;
}
oldlen = len;
}
grub_free (chunk);
lua_gc (state, LUA_GCCOLLECT, 0);
return grub_errno;
}
