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[PATCH] fcntl-h: check for AIX 7.1 bug with O_NOFOLLOW and O_CREAT
From: |
Paul Eggert |
Subject: |
[PATCH] fcntl-h: check for AIX 7.1 bug with O_NOFOLLOW and O_CREAT |
Date: |
Mon, 10 Sep 2012 13:51:36 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120828 Thunderbird/15.0 |
* m4/fcntl-o.m4 (gl_FCNTL_O_FLAGS): Check for AIX 7.1 bug
that caused a GNU tar test failure. Problem reported by Jez Wain; see
<http://lists.gnu.org/archive/html/bug-tar/2012-07/msg00018.html>.
---
ChangeLog | 7 +++++++
m4/fcntl-o.m4 | 13 ++++++++++++-
2 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/ChangeLog b/ChangeLog
index 282e060..18225e4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2012-09-10 Paul Eggert <address@hidden>
+
+ fcntl-h: check for AIX 7.1 bug with O_NOFOLLOW and O_CREAT
+ * m4/fcntl-o.m4 (gl_FCNTL_O_FLAGS): Check for AIX 7.1 bug
+ that caused a GNU tar test failure. Problem reported by Jez Wain; see
+ <http://lists.gnu.org/archive/html/bug-tar/2012-07/msg00018.html>.
+
2012-09-06 Eric Blake <address@hidden>
net_if: give more details about the bug being fixed
diff --git a/m4/fcntl-o.m4 b/m4/fcntl-o.m4
index 9862741..a413810 100644
--- a/m4/fcntl-o.m4
+++ b/m4/fcntl-o.m4
@@ -50,7 +50,18 @@ AC_DEFUN([gl_FCNTL_O_FLAGS],
#if HAVE_SYMLINK
{
static char const sym[] = "conftest.sym";
- if (symlink (".", sym) != 0)
+ if (symlink ("/dev/null", sym) != 0)
+ result |= 2;
+ else
+ {
+ int fd = open (sym, O_WRONLY | O_NOFOLLOW | O_CREAT, 0);
+ if (fd >= 0)
+ {
+ close (fd);
+ result |= 4;
+ }
+ }
+ if (unlink (sym) != 0 || symlink (".", sym) != 0)
result |= 2;
else
{
--
1.7.11.4
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