Add a simple utility to dump flattened BMessages. Added it to the image as well.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31897 a95241bf-73f2-0310-859d-f6bbb57e9c96

build/jam/HaikuImage

@@ -44,7 +44,7 @@ SYSTEM_BIN = "[" addattr alert arp base64 basename bash bc beep bootman bzip2
 	keymap kill less lessecho lesskey link linkcatkeys listarea listattr
 	listimage listdev
 	listport listres listsem listusb ln locate logger login logname ls lsindex
-	makebootable md5sum merge mimeset mkdos mkdir mkfifo mkfs mkindex
+	makebootable md5sum merge message mimeset mkdos mkdir mkfifo mkfs mkindex
 	modifiers mount mount_nfs mountvolume mv
 	nc netstat nl nohup
 	od open

src/bin/Jamfile

@@ -88,6 +88,7 @@ StdBinCommands
 	listres.cpp
 	mimeset.cpp
 	mkindex.cpp
+	message.cpp
 	modifiers.cpp
 	open.cpp
 	play.cpp

src/bin/message.cpp

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2009, Michael Lotz, mmlr@mlotz.ch.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include <File.h>
+#include <Message.h>
+
+#include <stdio.h>
+#include <string.h>
+
+
+int
+main(int argc, char *argv[])
+{
+	if (argc != 2) {
+		printf("usage: %s <flattened message file>\n", argv[0]);
+		return 1;
+	}
+
+	BFile input(argv[1], B_READ_ONLY);
+	if (!input.IsReadable()) {
+		printf("cannot open \"%s\" for reading\n", argv[1]);
+		return 2;
+	}
+
+	BMessage message;
+	status_t result = message.Unflatten(&input);
+	if (result != B_OK) {
+		printf("failed to unflatten message: %s\n", strerror(result));
+		return 3;
+	}
+
+	message.PrintToStream();
+	return 0;
+}