discover/grub2: Implement 'linux' & 'initrd' commands

[petitboot] / discover / grub2 / builtins.c

diff --git a/discover/grub2/builtins.c b/discover/grub2/builtins.c
index 55597c18467d4cd3f697816a804543fcf45366df..cd56dcc033f8eb67d414e68d241fd5e53b315edb 100644 (file)
--- a/discover/grub2/builtins.c
+++ b/discover/grub2/builtins.c
@@ -2,6 +2,8 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <log/log.h>
+#include <types/types.h>
 #include <talloc/talloc.h>
 #include <array-size/array-size.h>
 
@@ -33,14 +35,84 @@ static int builtin_set(struct grub2_script *script,
        return 0;
 }
 
+static int builtin_linux(struct grub2_script *script,
+               void *data __attribute__((unused)),
+               int argc, char *argv[])
+{
+       struct discover_boot_option *opt = script->opt;
+       const char *root;
+       int i;
+
+       if (!opt) {
+               pb_log("grub2 syntax error: 'linux' statement outside "
+                               "a menuentry.\n");
+               return -1;
+       }
+
+       if (argc < 2) {
+               pb_log("grub2 syntax error: no filename provided to "
+                               "linux statement\n");
+               return -1;
+       }
+
+       root = script_env_get(script, "root");
+
+       opt->boot_image = create_grub2_resource(opt, script->ctx->device,
+                                               root, argv[1]);
+       opt->option->boot_args = NULL;
+
+       if (argc > 2)
+               opt->option->boot_args = talloc_strdup(opt, argv[2]);
+
+       for (i = 3; i < argc; i++)
+               opt->option->boot_args = talloc_asprintf_append(
+                                               opt->option->boot_args,
+                                               " %s", argv[i]);
+       return 0;
+}
+
+static int builtin_initrd(struct grub2_script *script,
+               void *data __attribute__((unused)),
+               int argc, char *argv[])
+{
+       struct discover_boot_option *opt = script->opt;
+       const char *root;
+
+       if (!opt) {
+               pb_log("grub2 syntax error: 'initrd' statement outside "
+                               "a menuentry.\n");
+               return -1;
+       }
+
+       if (argc < 2) {
+               pb_log("grub2 syntax error: no filename provided to "
+                               "initrd statement\n");
+               return -1;
+       }
+
+       root = script_env_get(script, "root");
+       opt->initrd = create_grub2_resource(opt, script->ctx->device,
+                                               root, argv[1]);
+
+       return 0;
+}
+
 static struct {
        const char *name;
        grub2_function fn;
 } builtins[] = {
        {
                .name = "set",
-               .fn = builtin_set
+               .fn = builtin_set,
        },
+       {
+               .name = "linux",
+               .fn = builtin_linux,
+       },
+       {
+               .name = "initrd",
+               .fn = builtin_initrd,
+       }
 };
 
 void register_builtins(struct grub2_script *script)