$NetBSD: patch-ab,v 1.3 2007/12/22 04:27:17 taca Exp $

--- dd_rescue.c.orig	2006-07-23 20:47:50.000000000 +0900
+++ dd_rescue.c
@@ -55,6 +55,10 @@
 #include <sys/time.h>
 #include <sys/stat.h>
 
+#ifdef __DragonFly__
+#undef O_DIRECT
+#endif
+
 int softbs, hardbs, syncfreq;
 int maxerr, nrerr, reverse, dotrunc, abwrerr, sparse, nosparse;
 int verbose, quiet, interact, force;
@@ -742,7 +746,12 @@ int main(int argc, char* argv[])
 		ipos = 0;
 
 #ifdef O_DIRECT
-	if (posix_memalign(mp, sysconf(_SC_PAGESIZE), softbs)) {
+#ifdef linux
+#define my_valloc(a, b, c)	posix_memalign((a), (b), (c))
+#else
+#define my_valloc(a, b, c)	(*(a) = valloc((c)))
+#endif
+	if (my_valloc(mp, sysconf(_SC_PAGESIZE), softbs)) {
 		fplog(stderr, "dd_rescue: (fatal): allocation of aligned buffer failed!\n");
 		cleanup(); exit(18);
 	}