X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fparser.h;h=fc165c5aeda494a9051b368a86f633d83dd4c0d8;hp=bf9a4d02b4e5f55a96f9e604f49cb653bcad40c5;hb=33a0f544151f44bb58924ad281aaca2dc58fe561;hpb=ce5eab024583af5a4725503bad6ed2aee452b1aa

diff --git a/discover/parser.h b/discover/parser.h
index bf9a4d0..fc165c5 100644
--- a/discover/parser.h
+++ b/discover/parser.h
@@ -1,13 +1,39 @@
 #ifndef _PARSER_H
 #define _PARSER_H
 
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "device-handler.h"
+
 struct discover_context;
+struct device_handler;
+struct resource;
 
+/**
+ * Our config parser.
+ *
+ * Each parser is responsible for creating discover_boot_options from config
+ * files found on new devices. The boot items discovered during parse will have
+ * 'resources' attached (see @discover_boot_option), which may already be
+ * resolved (in the case of a device-local filename, or a URL), or unresolved
+ * (in the case of a filename on another device).
+ *
+ * If the boot option contains references to unresolved resources, the
+ * device handler will not inform clients about the boot options, as
+ * they're not properly "available" at this stage. The handler will attempt to
+ * resolve them whenever new devices are discovered, by calling the parser's
+ * resolve_resource function. Once a boot option's resources are full resolved,
+ * the option can be sent to clients.
+ */
 struct parser {
-	char *name;
-	int priority;
-	int (*parse)(struct discover_context *ctx);
-	struct parser *next;
+	char			*name;
+	int			(*parse)(struct discover_context *ctx);
+	bool			(*resolve_resource)(
+						struct device_handler *handler,
+						struct resource *res);
 };
 
 enum generic_icon_type {
@@ -20,6 +46,35 @@ enum generic_icon_type {
 
 #define streq(a,b) (!strcasecmp((a),(b)))
 
+void parser_init(void);
+
 void iterate_parsers(struct discover_context *ctx);
+int parse_user_event(struct discover_context *ctx, struct event *event);
+
+/* File IO functions for parsers; these should be the only interface that
+ * parsers use to access a device's filesystem.
+ *
+ * These are intended for small amounts of data, typically text
+ * configuration and state files.  Note that parser_request_file,
+ * and parser_replace_file work only on non-directories.
+ */
+int parser_request_file(struct discover_context *ctx,
+		struct discover_device *dev, const char *filename,
+		char **buf, int *len);
+int parser_replace_file(struct discover_context *ctx,
+		struct discover_device *dev, const char *filename,
+		char *buf, int len);
+int parser_request_url(struct discover_context *ctx, struct pb_url *url,
+		char **buf, int *len);
+/* parser_stat_path returns 0 if path can be stated on dev by the
+ * running user.  Note that this function follows symlinks, like the
+ * stat system call.  When the function returns 0, also fills in
+ * statbuf for the path.  Returns non-zero on error.  This function
+ * does not have the limitations on file size that the functions above
+ * do.  Unlike some of the functions above, this function also works
+ * on directories. */
+int parser_stat_path(struct discover_context *ctx,
+		struct discover_device *dev, const char *path,
+		struct stat *statbuf);
 
 #endif /* _PARSER_H */