Do not expose O_TMPFILE in a public header.

Adjust tst-open-tmpfile so that it exits with 0 in case of missing

kernel support.

Index: b/io/tst-open-tmpfile.c

===================================================================

--- a/io/tst-open-tmpfile.c

+++ b/io/tst-open-tmpfile.c

@@ -33,7 +33,6 @@ static int do_test (void);

 #define TEST_FUNCTION do_test ()

 #include "../test-skeleton.c"

-#ifdef O_TMPFILE

 typedef int (*wrapper_func) (const char *, int, mode_t);

 /* Error-checking wrapper for the open function, compatible with the

@@ -157,7 +156,7 @@ static void

 check_wrapper_flags_mode (const char *op, wrapper_func wrapper,

                           const char *path, int flags, mode_t mode)

 {

-  int fd = wrapper (path, flags | O_TMPFILE, mode);

+  int fd = wrapper (path, flags | __O_TMPFILE, mode);

   struct stat64 st;

   if (fstat64 (fd, &st) != 0)

     {

@@ -257,20 +256,20 @@ check_wrapper (const char *op, wrapper_f

 }

 /* Verify that the directory at PATH supports O_TMPFILE.  Exit with

-   status 77 (unsupported) if the kernel does not support O_TMPFILE.

-   Even with kernel support, not all file systems O_TMPFILE, so return

-   true if the directory supports O_TMPFILE, false if not.  */

+   status 0 if the kernel does not support O_TMPFILE.  Even with

+   kernel support, not all file systems O_TMPFILE, so return true if

+   the directory supports O_TMPFILE, false if not.  */

 static bool

 probe_path (const char *path)

 {

-  int fd = openat (AT_FDCWD, path, O_TMPFILE | O_RDWR, 0);

+  int fd = openat (AT_FDCWD, path, __O_TMPFILE | O_RDWR, 0);

   if (fd < 0)

     {

       if (errno == EISDIR)

         /* The system does not support O_TMPFILE.  */

         {

           printf ("info: kernel does not support O_TMPFILE\n");

-          exit (77);

+          exit (0);

         }

       if (errno == EOPNOTSUPP)

         {

@@ -291,29 +290,14 @@ do_test (void)

   const char *paths[] = { ".", "/dev/shm", "/tmp",

                           getenv ("TEST_TMPFILE_PATH"),

                           NULL };

-  bool supported = false;

   for (int i = 0; paths[i] != NULL; ++i)

     if (probe_path (paths[i]))

       {

-        supported = true;

         check_wrapper ("open", wrap_open, paths[i]);

         check_wrapper ("openat", wrap_openat, paths[i]);

         check_wrapper ("open64", wrap_open64, paths[i]);

         check_wrapper ("openat64", wrap_openat64, paths[i]);

       }

-  if (!supported)

-    return 77;

-

   return 0;

 }

-

-#else  /* !O_TMPFILE */

-

-static int

-do_test (void)

-{

-  return 77;

-}

-

-#endif  /* O_TMPFILE */

Index: b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h

===================================================================

--- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h

+++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h

@@ -131,7 +131,6 @@

 # define O_DIRECT	__O_DIRECT	/* Direct disk access.	*/

 # define O_NOATIME	__O_NOATIME	/* Do not set atime.  */

 # define O_PATH		__O_PATH	/* Resolve pathname but do not open file.  */

-# define O_TMPFILE	__O_TMPFILE	/* Atomically create nameless file.  */

 #endif

 /* For now, Linux has no separate synchronicitiy options for read