[PATCH][BZ 15514] Use statvfs64() for pathconf(_PC_NAME_MAX).

[Peter TB Brett <peter at peter-b dot co dot uk>]

pathconf(_PC_NAME_MAX) was implemented on top of statfs().  The 32bit
version therefore fails EOVERFLOW if the filesystem blockcount is
sufficiently large.

Most pathconf() queries use statvfs64(), which avoids this issue.  This
patch modifies pathconf(_PC_NAME_MAX) to do likewise.

                                         Peter

P.S. I haven't completed FSF copyright assignment.

-- 
Dr Peter Brett <peter@peter-b.co.uk>

From 39df7d3a6414920e6c241c23655acecb31bee0de Mon Sep 17 00:00:00 2001
From: Peter TB Brett <peter@peter-b.co.uk>
Date: Sun, 6 Apr 2014 10:51:05 +0100
Subject: [PATCH] Use statvfs64() for pathconf(_PC_NAME_MAX). [Bug #15514]

---
 ChangeLog                |  6 ++++++
 sysdeps/posix/pathconf.c | 14 +++-----------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a0bb465..5b94808 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2014-04-06  Peter Brett  <peter@peter-b.co.uk>
+
+	[BZ #15514]
+	* sysdeps/posix/pathconf.c (__pathconf): Use statvfs64() for
+	pathconf(_PC_NAME_MAX).
+
 2014-04-04  Chris Metcalf  <cmetcalf@tilera.com>
 
 	* sysdeps/tile/dl-runtime.c (_dl_unmap): Fix cut-and-paste bug
diff --git a/sysdeps/posix/pathconf.c b/sysdeps/posix/pathconf.c
index 8aa55e0..ac617d4 100644
--- a/sysdeps/posix/pathconf.c
+++ b/sysdeps/posix/pathconf.c
@@ -65,10 +65,10 @@ __pathconf (const char *path, int name)
     case _PC_NAME_MAX:
 #ifdef	NAME_MAX
       {
-	struct statfs buf;
+	struct statvfs64 sv;
 	int save_errno = errno;
 
-	if (__statfs (path, &buf) < 0)
+	if (__statvfs64 (path, &sv) < 0)
 	  {
 	    if (errno == ENOSYS)
 	      {
@@ -79,15 +79,7 @@ __pathconf (const char *path, int name)
 	  }
 	else
 	  {
-#ifdef _STATFS_F_NAMELEN
-	    return buf.f_namelen;
-#else
-# ifdef _STATFS_F_NAME_MAX
-	    return buf.f_name_max;
-# else
-	    return NAME_MAX;
-# endif
-#endif
+	    return sv.f_namemax;
 	  }
       }
 #else
-- 
1.9.0

Attachment: pgpgm0k_E9lEg.pgp
Description: PGP signature