--- a/ChangeLog	Mon Oct 14 14:25:06 2013 -0700
+++ b/ChangeLog	Wed Oct 16 07:47:53 2013 -0700
@@ -1,3 +1,16 @@
+2013-10-16  Paul Eggert  <eggert@cs.ucla.edu>
+
+	mkfifo-tests, etc.: allow HP-UX 11.11 bug
+	Problem reported by Daniel Richard G. in
+	<http://lists.gnu.org/archive/html/bug-gnulib/2013-10/msg00068.html>.
+	* doc/posix-functions/mkfifo.texi (mkfifo):
+	* doc/posix-functions/mkfifoat.texi (mkfifoat):
+	* doc/posix-functions/mknod.texi (mknod):
+	* doc/posix-functions/mknodat.texi (mknodat):
+	Document the HP-UX 11.11 bug.
+	* tests/test-mkfifo.h (test_mkfifo):
+	Allow the HP-UX 11.11 bug.
+
 2013-10-14  Paul Eggert  <eggert@cs.ucla.edu>
 
 	acl: allow cross-compilation to Gentoo

--- a/doc/posix-functions/mkfifo.texi	Mon Oct 14 14:25:06 2013 -0700
+++ b/doc/posix-functions/mkfifo.texi	Wed Oct 16 07:47:53 2013 -0700
@@ -19,4 +19,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+If the argument exists and is a directory, this function fails with
+@code{EISDIR} instead of the correct @code{EEXIST}:
+HP-UX 11.11.
 @end itemize

--- a/doc/posix-functions/mkfifoat.texi	Mon Oct 14 14:25:06 2013 -0700
+++ b/doc/posix-functions/mkfifoat.texi	Wed Oct 16 07:47:53 2013 -0700
@@ -20,6 +20,9 @@
 @itemize
 @item
 The gnulib replacement function always fails with @samp{ENOSYS} on
-some platforms:
-mingw, MSVC 9.
+some platforms: mingw, MSVC 9.
+@item
+If the argument exists and is a directory, the gnulib replacement
+function fails with @code{EISDIR} instead of the correct
+@code{EEXIST}: HP-UX 11.11.
 @end itemize

--- a/doc/posix-functions/mknod.texi	Mon Oct 14 14:25:06 2013 -0700
+++ b/doc/posix-functions/mknod.texi	Wed Oct 16 07:47:53 2013 -0700
@@ -26,4 +26,8 @@
 Use of this function for anything except fifos is not portable,
 generally requiring super-user privileges and knowledge of supported
 device numbers.
+@item
+If the argument exists and is a directory, this function fails with
+@code{EISDIR} instead of the correct @code{EEXIST}:
+HP-UX 11.11.
 @end itemize

--- a/doc/posix-functions/mknodat.texi	Mon Oct 14 14:25:06 2013 -0700
+++ b/doc/posix-functions/mknodat.texi	Wed Oct 16 07:47:53 2013 -0700
@@ -22,4 +22,8 @@
 The gnulib replacement function always fails with @samp{ENOSYS} on
 some platforms:
 mingw, MSVC 9.
+@item
+If the argument exists and is a directory, the gnulib replacement
+function fails with @code{EISDIR} instead of the correct
+@code{EEXIST}: HP-UX 11.11.
 @end itemize

--- a/tests/test-mkfifo.h	Mon Oct 14 14:25:06 2013 -0700
+++ b/tests/test-mkfifo.h	Wed Oct 16 07:47:53 2013 -0700
@@ -43,7 +43,10 @@
   ASSERT (errno == ENOENT);
   errno = 0;
   ASSERT (func (".", 0600) == -1);
-  ASSERT (errno == EEXIST || errno == EINVAL);
+  /* Allow HP-UX 11.11's EISDIR, even though POSIX says it's wrong,
+     since it doesn't really hurt anything and we lack the energy to
+     fix it.  */
+  ASSERT (errno == EEXIST || errno == EINVAL || errno == EISDIR);
   errno = 0;
   ASSERT (func (BASE "fifo", 0600) == -1);
   ASSERT (errno == EEXIST);