From 6e04cbbe79f5965809fdbf1f28d7ae8b4af74d31 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@gmail.com>
Date: Mon, 2 May 2011 20:59:51 -0400
Subject: [PATCH] Fix pathconf(_PC_BUF_SIZE).

---
 ChangeLog                          |  6 ++++++
 NEWS                               |  4 ++--
 sysdeps/unix/sysv/linux/pathconf.c | 14 +++++++++++++-
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 134fe9b..3840eeb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-02  Ulrich Drepper  <drepper@gmail.com>
+
+	[BZ #12723]
+	* sysdeps/unix/sysv/linux/pathconf.c (__pathconf): Implement
+	_PC_PIPE_BUF handling.
+
 2011-04-30  Bruno Haible  <bruno@clisp.org>
 
 	[BZ #12717]
diff --git a/NEWS b/NEWS
index 445a9f1..d30a8a9 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-GNU C Library NEWS -- history of user-visible changes.  2011-5-1
+GNU C Library NEWS -- history of user-visible changes.  2011-5-2
 Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
 See the end for copying conditions.
 
@@ -19,7 +19,7 @@ Version 2.14
 * The following bugs are resolved with this release:
 
   11724, 12420, 12445, 12454, 12460, 12469, 12489, 12509, 12510, 12518, 12583,
-  12587, 12597, 12631, 12650, 12653, 12655, 12685, 12717
+  12587, 12597, 12631, 12650, 12653, 12655, 12685, 12717, 12723
 
 Version 2.13
 
diff --git a/sysdeps/unix/sysv/linux/pathconf.c b/sysdeps/unix/sysv/linux/pathconf.c
index ae597fb..375d672 100644
--- a/sysdeps/unix/sysv/linux/pathconf.c
+++ b/sysdeps/unix/sysv/linux/pathconf.c
@@ -1,5 +1,5 @@
 /* Get file-specific information about a file.  Linux version.
-   Copyright (C) 1991,1995,1996,1998-2003,2008,2010 Free Software Foundation, Inc.
+   Copyright (C) 1991,1995,1996,1998-2003,2008,2010,2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -36,6 +36,7 @@ long int
 __pathconf (const char *file, int name)
 {
   struct statfs fsbuf;
+  int fd;
 
   switch (name)
     {
@@ -51,6 +52,17 @@ __pathconf (const char *file, int name)
     case _PC_CHOWN_RESTRICTED:
       return __statfs_chown_restricted (__statfs (file, &fsbuf), &fsbuf);
 
+    case _PC_PIPE_BUF:
+      fd = open_not_cancel_2 (file, O_RDONLY|O_NONBLOCK);
+      if (fd >= 0)
+	{
+	  long int r = __fcntl (fd, F_GETPIPE_SZ);
+	  close_not_cancel_no_status (fd);
+	  if (r > 0)
+	    return r;
+	}
+      /* FALLTHROUGH */
+
     default:
       return posix_pathconf (file, name);
     }
-- 
2.7.4