discover/grub2: Hook up flex/bison parser to discover server

[petitboot] / discover / grub2 / grub2.c

diff --git a/discover/grub2/grub2.c b/discover/grub2/grub2.c
new file mode 100644 (file)
index 0000000..ebc6ac7
--- /dev/null
+++ b/discover/grub2/grub2.c
@@ -0,0 +1,103 @@
+
+#include <assert.h>
+
+#include <talloc/talloc.h>
+
+#include <discover/resource.h>
+#include <discover/parser.h>
+#include <discover/parser-utils.h>
+
+#include "grub2.h"
+#include "parser.h"
+#include "lexer.h"
+
+static const char *const grub2_conf_files[] = {
+       "/grub.cfg",
+       "/menu.lst",
+       "/grub/grub.cfg",
+       "/grub2/grub.cfg",
+       "/grub/menu.lst",
+       "/boot/grub/grub.cfg",
+       "/boot/grub2/grub.cfg",
+       "/boot/grub/menu.lst",
+       "/GRUB.CFG",
+       "/MENU.LST",
+       "/GRUB/GRUB.CFG",
+       "/GRUB2/GRUB.CFG",
+       "/GRUB/MENU.LST",
+       "/BOOT/GRUB/GRUB.CFG",
+       "/BOOT/GRUB/MENU.LST",
+       NULL
+};
+
+struct grub2_resource_info {
+       struct grub2_root *root;
+       char *path;
+};
+
+/* we use slightly different resources for grub2 */
+struct resource *create_grub2_resource(void *ctx,
+               struct discover_device *orig_device,
+               struct grub2_root *root, const char *path)
+{
+       struct grub2_resource_info *info;
+       struct resource *res;
+
+       res = talloc(ctx, struct resource);
+
+       if (root) {
+               info = talloc(res, struct grub2_resource_info);
+               info->root = root;
+               talloc_reference(info, root);
+               info->path = talloc_strdup(info, path);
+
+               res->resolved = false;
+               res->info = info;
+
+       } else
+               resolve_resource_against_device(res, orig_device, path);
+
+       return res;
+}
+
+bool resolve_grub2_resource(struct device_handler *handler,
+               struct resource *res)
+{
+       struct grub2_resource_info *info = res->info;
+       struct discover_device *dev;
+
+       assert(!res->resolved);
+
+       dev = device_lookup_by_uuid(handler, info->root->uuid);
+
+       if (!dev)
+               return false;
+
+       resolve_resource_against_device(res, dev, info->path);
+       talloc_free(info);
+
+       return true;
+}
+
+static int grub2_parse(struct discover_context *dc, char *buf, int len)
+{
+       struct grub2_parser *parser;
+
+       parser = grub2_parser_create(dc);
+
+       grub2_parser_parse(parser, buf, len);
+
+       talloc_free(parser);
+
+       return 1;
+}
+
+static struct parser grub2_parser = {
+       .name                   = "grub2",
+       .method                 = CONF_METHOD_LOCAL_FILE,
+       .parse                  = grub2_parse,
+       .filenames              = grub2_conf_files,
+       .resolve_resource       = resolve_grub2_resource,
+};
+
+register_parser(grub2_parser);