X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fparser.c;h=54787201553010d808297eaf8cc8c1730540d0db;hp=5f4e5149557678c6e0c34c59c02a42f5b5b46317;hb=c3dfc9b7b91045172d460651c0309b09b0ab121a;hpb=92806cf6bc15f680f75879288df12ea9a87e4608

diff --git a/discover/parser.c b/discover/parser.c
index 5f4e514..5478720 100644
--- a/discover/parser.c
+++ b/discover/parser.c
@@ -1,39 +1,210 @@
 
+#include <fcntl.h>
 #include <stdlib.h>
 
 #include "types/types.h"
+#include <file/file.h>
 #include <log/log.h>
+#include <talloc/talloc.h>
 
 #include "device-handler.h"
 #include "parser.h"
 #include "parser-utils.h"
+#include "paths.h"
 
-struct parser __grub2_parser;
-struct parser __kboot_parser;
-struct parser __native_parser;
-struct parser __yaboot_parser;
-
-static const struct parser *const parsers[] = {
-//	&__native_parser,
-	&__kboot_parser,
-	&__grub2_parser,
-	&__yaboot_parser,
-	NULL
+struct p_item {
+	struct list_item list;
+	struct parser *parser;
 };
 
+STATIC_LIST(parsers);
+
+static char *local_path(struct discover_context *ctx,
+		struct discover_device *dev,
+		const char *filename)
+{
+	return join_paths(ctx, dev->root_path, filename);
+}
+
+int parser_request_file(struct discover_context *ctx,
+		struct discover_device *dev, const char *filename,
+		char **buf, int *len)
+
+{
+	char *path;
+	int rc;
+
+	/* we only support local files at present */
+	if (!dev->mount_path)
+		return -1;
+
+	path = local_path(ctx, dev, filename);
+
+	rc = read_file(ctx, path, buf, len);
+
+	talloc_free(path);
+
+	return rc;
+}
+
+int parser_stat_path(struct discover_context *ctx,
+		struct discover_device *dev, const char *path,
+		struct stat *statbuf)
+{
+	int rc = -1;
+	char *full_path;
+
+	/* we only support local files at present */
+	if (!dev->mount_path)
+		return -1;
+
+	full_path = local_path(ctx, dev, path);
+
+	rc = stat(full_path, statbuf);
+	if (rc) {
+		rc = -1;
+		goto out;
+	}
+
+	rc = 0;
+out:
+	talloc_free(full_path);
+
+	return rc;
+}
+
+bool parser_is_unique(struct discover_context *ctx, struct discover_device *dev,
+	const char *filename, struct list *found_list)
+{
+	struct stat stat;
+	struct parser_found_file *found_file;
+	const struct parser_found_file *entry;
+
+	if (parser_stat_path(ctx, dev, filename, &stat)) {
+		pb_debug("%s: Not found: '%s'\n", __func__, filename);
+		return false;
+	}
+
+	list_for_each_entry(found_list, entry, list) {
+		if (entry->ino == stat.st_ino) {
+			pb_log("%s: Duplicate: '%s' = '%s'\n",
+				__func__, filename, entry->filename);
+			return false;
+		}
+	}
+
+	pb_debug("%s: Found:     '%s'\n", __func__, filename);
+
+	found_file = talloc_zero(found_list, struct parser_found_file);
+	found_file->filename = talloc_strdup(found_file, filename);
+	found_file->ino = stat.st_ino;
+	list_add(found_list, &found_file->list);
+
+	return true;
+}
+
+int parser_replace_file(struct discover_context *ctx,
+		struct discover_device *dev, const char *filename,
+		char *buf, int len)
+{
+	bool release;
+	char *path;
+	int rc;
+
+	if (!dev->mounted)
+		return -1;
+
+	rc = device_request_write(dev, &release);
+	if (rc) {
+		pb_log("Can't write file %s: device doesn't allow write\n",
+				dev->device_path);
+		return -1;
+	}
+
+	path = local_path(ctx, dev, filename);
+
+	rc = replace_file(path, buf, len);
+
+	talloc_free(path);
+
+	device_release_write(dev, release);
+
+	return rc;
+}
+
+int parser_request_url(struct discover_context *ctx, struct pb_url *url,
+		char **buf, int *len)
+{
+	struct load_url_result *result;
+	int rc;
+
+	result = load_url(ctx, url);
+	if (!result)
+		goto out;
+
+	rc = read_file(ctx, result->local, buf, len);
+	if (rc) {
+		pb_log("Read failed for the parser %s on file %s\n",
+				ctx->parser->name, result->local);
+		goto out_clean;
+	}
+
+	return 0;
+
+out_clean:
+	if (result->cleanup_local)
+		unlink(result->local);
+out:
+	return -1;
+}
+
+int parser_scandir(struct discover_context *ctx, const char *dirname,
+		   struct dirent ***files, int (*filter)(const struct dirent *),
+		   int (*comp)(const struct dirent **, const struct dirent **))
+{
+	char *path;
+	int n;
+
+	path = talloc_asprintf(ctx, "%s%s", ctx->device->mount_path, dirname);
+	if (!path)
+		return -1;
+
+	n = scandir(path, files, filter, comp);
+	talloc_free(path);
+	return n;
+}
+
 void iterate_parsers(struct discover_context *ctx)
 {
-	int i;
-	unsigned int count = 0;
+	struct p_item* i;
 
 	pb_log("trying parsers for %s\n", ctx->device->device->id);
 
-	for (i = 0; parsers[i]; i++) {
-		pb_log("\ttrying parser '%s'\n", parsers[i]->name);
-		count += parsers[i]->parse(ctx);
+	list_for_each_entry(&parsers, i, list) {
+		pb_debug("\ttrying parser '%s'\n", i->parser->name);
+		ctx->parser = i->parser;
+		i->parser->parse(ctx);
 	}
-	if (!count)
-		pb_log("\tno boot_options found\n");
+	ctx->parser = NULL;
+}
+
+static void *parsers_ctx;
+
+void __register_parser(struct parser *parser)
+{
+	struct p_item *i;
+
+	if (!parsers_ctx)
+		parsers_ctx = talloc_new(NULL);
+
+	i = talloc(parsers_ctx, struct p_item);
+	i->parser = parser;
+	list_add(&parsers, &i->list);
+}
+
+static __attribute__((destructor)) void cleanup_parsers(void)
+{
+	talloc_free(parsers_ctx);
 }
 
 void parser_init(void)