gistfile1.txt

$ diff -u lib/Sys/Sendfile.xs.orig lib/Sys/Sendfile.xs
--- lib/Sys/Sendfile.xs.orig	2009-09-14 13:16:26.000000000 +0900
+++ lib/Sys/Sendfile.xs	2009-09-15 22:12:08.000000000 +0900
@@ -12,7 +12,7 @@
 
 #if defined linux || defined solaris
 #include <sys/sendfile.h>
-#elif defined __FreeBSD__
+#elif defined (__FreeBSD__) || defined (__APPLE__)
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/uio.h>
@@ -24,7 +24,7 @@
 #include "perl.h"
 #include "XSUB.h"
 
-#if !defined __linux__ && !defined __solaris__ && !defined __FreeBSD__
+#if !defined __linux__ && !defined __solaris__ && !defined __FreeBSD__ && !defined __APPLE__
 
 #ifdef __GNUC__
 #error Your operating system appears to be unsupported
@@ -62,9 +62,17 @@
 	{
 		off_t bytes;
 		int ret = sendfile(in, out, real_offset, count, NULL, &bytes, 0);
-		if (ret == -1)
+		if (ret == -1 && ! (errno == EAGAIN || errno == EINTR))
 			XSRETURN_EMPTY;
 		else
 			XSRETURN_IV(bytes);
+#elif defined __APPLE__
+        {
+                off_t bytes = count;
+                int ret = sendfile(in, out, real_offset, &bytes, NULL, 0);
+                if (ret == -1 && ! (errno == EAGAIN || errno == EINTR))
+                        XSRETURN_EMPTY;
+                else
+                        XSRETURN_IV(bytes);
 #endif
 	}