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Index: head/lib/libc/sys/shm_open.2
===================================================================
--- head/lib/libc/sys/shm_open.2
+++ head/lib/libc/sys/shm_open.2
@@ -28,7 +28,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd January 13, 2017
+.Dd January 20, 2017
.Dt SHM_OPEN 2
.Os
.Sh NAME
@@ -187,6 +187,11 @@
and
.Xr write 2 .
.Pp
+.Fx
+also supports zero-copy transmission of data from shared memory
+objects with
+.Xr sendfile 2 .
+.Pp
Neither shared memory objects nor their contents persist across reboots.
.Pp
Writes do not extend shared memory objects, so
@@ -281,7 +286,8 @@
.Xr fstat 2 ,
.Xr ftruncate 2 ,
.Xr mmap 2 ,
-.Xr munmap 2
+.Xr munmap 2 ,
+.Xr sendfile 2
.Sh STANDARDS
The
.Fn shm_open

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