4 files changed, 52 insertions, 4 deletions
diff --git a/src/OS/os.c-FreeBSD b/src/OS/os.c-FreeBSD
new file mode 100644
index 000000000..a892e5940
--- /dev/null
+++ b/src/OS/os.c-FreeBSD
@@ -0,0 +1,25 @@
+/*************************************************
+*     Exim - an Internet mail transport agent    *
+*************************************************/
+
+/* Copyright (c) Jeremy Harris 2017 */
+/* See the file NOTICE for conditions of use and distribution. */
+
+/* FreeBSD-specific code. This is concatenated onto the generic
+src/os.c file. */
+
+
+/*************
+* Sendfile   *
+*************/
+#include <sys/sendfile.h>
+
+ssize_t
+os_sendfile(int out, int in, off_t * off, size_t cnt)
+{
+off_t written;
+return sendfile(in, out, *off, cnt, NULL, &written, 0) < 0
+  ? (ssize_t) -1 : (ssize_t) written;
+}
+
+/* End of os.c-Linux */
diff --git a/src/OS/os.c-Linux b/src/OS/os.c-Linux
index 4bca77615..dd65c8b39 100644
--- a/src/OS/os.c-Linux
+++ b/src/OS/os.c-Linux
@@ -150,4 +150,16 @@ return yield;
 
 #endif  /* FIND_RUNNING_INTERFACES */
 
+
+/*************
+* Sendfile   *
+*************/
+#include <sys/sendfile.h>
+
+ssize_t
+os_sendfile(int out, int in, off_t * off, size_t cnt)
+{
+return sendfile(out, in, off, cnt);
+}
+
 /* End of os.c-Linux */
diff --git a/src/OS/os.h-FreeBSD b/src/OS/os.h-FreeBSD
index bf43e0a3c..9b47de3d1 100644
--- a/src/OS/os.h-FreeBSD
+++ b/src/OS/os.h-FreeBSD
@@ -1,5 +1,7 @@
 /* Exim: OS-specific C header file for FreeBSD */
 
+#include <sys/types.h>
+
 #define HAVE_BSD_GETLOADAVG
 #define HAVE_SETCLASSRESOURCES
 #define HAVE_MMAP
@@ -34,4 +36,11 @@ typedef struct flock flock_t;
 /* for more specific version constraints, include <sys/param.h> and look at
  * __FreeBSD_version */
 
+
+/* When using DKIM, setting OS_SENDFILE can increase
+performance on outgoing mail a bit. */
+
+#define OS_SENDFILE
+extern ssize_t os_sendfile(int, int, off_t *, size_t);
+
 /* End */
diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux
index 3e9303cab..57034649c 100644
--- a/src/OS/os.h-Linux
+++ b/src/OS/os.h-Linux
@@ -5,6 +5,7 @@ does not pull in <features.h>.  Best to just pull it in now and have done
 with the issue. */
 
 #include <features.h>
+#include <sys/types.h>
 
 
 #define CRYPT_H
@@ -15,13 +16,14 @@ with the issue. */
 #define NO_IP_VAR_H
 #define SIG_IGN_WORKS
 
-/* When using the DKIM, setting HAVE_LINUX_SENDFILE can increase
+/* When using DKIM, setting OS_SENDFILE can increase
 performance on outgoing mail a bit. Note: With older glibc versions
 this setting will conflict with the _FILE_OFFSET_BITS=64 setting
 defined as part of the Linux CFLAGS.  As of 2017 those are declared
 to be too old to build by default. */
 
-#define HAVE_LINUX_SENDFILE
+#define OS_SENDFILE
+extern ssize_t os_sendfile(int, int, off_t *, size_t);
 
 #define F_FREESP     O_TRUNC
 typedef struct flock flock_t;
@@ -30,8 +32,8 @@ typedef struct flock flock_t;
 #define OS_STRSIGNAL
 
 #if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD_kernel__)
-#define SIOCGIFCONF_GIVES_ADDR
-#define HAVE_SYS_MOUNT_H
+# define SIOCGIFCONF_GIVES_ADDR
+# define HAVE_SYS_MOUNT_H
 #endif
 
 #if defined(__linux__)