discover/grub2: Add nops for unnecessary builtins
[petitboot] / discover / grub2 / builtins.c
index cd56dcc033f8eb67d414e68d241fd5e53b315edb..4261eebdbdea73563b4c6d50d01a975e8fea11e3 100644 (file)
@@ -97,6 +97,40 @@ static int builtin_initrd(struct grub2_script *script,
        return 0;
 }
 
+static int builtin_search(struct grub2_script *script,
+               void *data __attribute__((unused)),
+               int argc, char *argv[])
+{
+       const char *env_var, *spec;
+       int i;
+
+       env_var = NULL;
+
+       for (i = 1; i < argc - 1; i++) {
+               if (!strncmp(argv[i], "--set=", strlen("--set="))) {
+                       env_var = argv[i] + strlen("--set=");
+                       break;
+               }
+       }
+
+       if (!env_var)
+               return 0;
+
+       spec = argv[argc - 1];
+
+       script_env_set(script, env_var, spec);
+
+       return 0;
+}
+
+static int builtin_nop(struct grub2_script *script __attribute__((unused)),
+               void *data __attribute__((unused)),
+               int argc __attribute__((unused)),
+               char *argv[] __attribute__((unused)))
+{
+       return 0;
+}
+
 static struct {
        const char *name;
        grub2_function fn;
@@ -112,9 +146,17 @@ static struct {
        {
                .name = "initrd",
                .fn = builtin_initrd,
+       },
+       {
+               .name = "search",
+               .fn = builtin_search,
        }
 };
 
+static const char *nops[] = {
+       "echo", "export", "insmod", "loadfont", "terminfo",
+};
+
 void register_builtins(struct grub2_script *script)
 {
        unsigned int i;
@@ -122,4 +164,7 @@ void register_builtins(struct grub2_script *script)
        for (i = 0; i < ARRAY_SIZE(builtins); i++)
                script_register_function(script, builtins[i].name,
                                builtins[i].fn, NULL);
+
+       for (i = 0; i < ARRAY_SIZE(nops); i++)
+               script_register_function(script, nops[i], builtin_nop, NULL);
 }