PORTREVISION=	1

changes `lfp_sendfile' so it returns the number of bytes sent,

mimicking Linux sendfile(2).

Submited to upstream by Vasily Postnicov (shamaz.mazum@gmail.com),

see https://github.com/sionescu/libfixposix/pull/18.

--- src/lib/sendfile.c.orig	2018-02-19 22:24:10 UTC

+++ src/lib/sendfile.c

@@ -38,6 +38,9 @@ int sendfile(int, int, off_t, off_t *, void *, int);

 #endif

 #include <stdlib.h>

+# if defined(__FreeBSD__) || defined(__DragonFly__)

+#include <errno.h>

+# endif

 DSO_PUBLIC ssize_t

 lfp_sendfile(int out_fd, int in_fd, off_t offset, size_t nbytes)

@@ -46,8 +49,13 @@ lfp_sendfile(int out_fd, int in_fd, off_t offset, size

 # if defined(__linux__)

     off_t off = offset;

     return (ssize_t) sendfile(out_fd, in_fd, &off, nbytes);

-# elif defined(__FreeBSD__)

-    return (ssize_t) sendfile(in_fd, out_fd, offset, nbytes, NULL, NULL, SF_MNOWAIT);

+# elif defined(__FreeBSD__) || defined(__DragonFly__)

+    off_t sbytes;

+    int res = sendfile(in_fd, out_fd, offset, nbytes, NULL, &sbytes, 0);

+    if (res == -1 && errno == EAGAIN)

+        res = 0;

+    if (res == 0) res = sbytes;

+    return res;

 # elif defined(__DragonFly__)

     return (ssize_t) sendfile(in_fd, out_fd, offset, nbytes, NULL, NULL, 0);

 # elif defined(__APPLE__)