From 15b1afc9175e045b3b28523309fb3b28a3fab484 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 2 Aug 2020 18:01:05 +0000
Subject: replace: provide PIPE_BUF on GNU/Hurd

There is no hardcoded PIPE_BUF pipe limitation on GNU/Hurd, but POSIX
provides a minimum value that we can use.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
---
 lib/replace/system/network.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/replace/system/network.h b/lib/replace/system/network.h
index a84bfd453b1..1721d65a51a 100644
--- a/lib/replace/system/network.h
+++ b/lib/replace/system/network.h
@@ -91,6 +91,8 @@
 #include <stropts.h>
 #endif
 
+#include <limits.h>
+
 #ifndef HAVE_SOCKLEN_T
 #define HAVE_SOCKLEN_T
 typedef int socklen_t;
@@ -342,6 +344,16 @@ typedef unsigned short int sa_family_t;
 # endif
 #endif
 
+#ifndef PIPE_BUF
+# ifdef __GNU__
+  /*
+   * GNU/Hurd does not have such hardcoded limitations. But it has to support
+   * the minimum POSIX value anyway.
+   */
+#  define PIPE_BUF 512
+# endif
+#endif
+
 #ifndef HAVE_STRUCT_ADDRINFO
 #define HAVE_STRUCT_ADDRINFO
 struct addrinfo {
-- 
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