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-rw-r--r--misc/sys/uio.h18
1 files changed, 13 insertions, 5 deletions
diff --git a/misc/sys/uio.h b/misc/sys/uio.h
index 66c22f04f6..2ae918a8d4 100644
--- a/misc/sys/uio.h
+++ b/misc/sys/uio.h
@@ -19,15 +19,17 @@
 #define _SYS_UIO_H	1
 
 #include <features.h>
-
 #include <sys/types.h>
+#include <bits/types/struct_iovec.h>
+#include <bits/uio_lim.h>
+#ifdef __IOV_MAX
+# define UIO_MAXIOV __IOV_MAX
+#else
+# undef UIO_MAXIOV
+#endif
 
 __BEGIN_DECLS
 
-/* This file defines `struct iovec'.  */
-#include <bits/uio.h>
-
-
 /* Read data from file descriptor FD, and put the result in the
    buffers described by IOVEC, which is a vector of COUNT 'struct iovec's.
    The buffers are filled in the order specified.
@@ -160,4 +162,10 @@ extern ssize_t pwritev64v2 (int __fd, const struct iovec *__iodev,
 
 __END_DECLS
 
+/* Some operating systems provide system-specific extensions to this
+   header.  */
+#ifdef __USE_GNU
+# include <bits/uio-ext.h>
+#endif
+
 #endif /* sys/uio.h */