Update from Gnulib

This incorporates:
2018-03-26 time_rz: work around Mac OS X 10.6 infloop
2018-03-20 euidaccess: Port to native Windows.
* lib/euidaccess.c, lib/time_rz.c, m4/time_rz.m4: Copy from Gnulib.

2 files changed, 23 insertions, 3 deletions

diff --git a/lib/euidaccess.c b/lib/euidaccess.c
index aee693571c9..4f512f5af54 100644
--- a/lib/euidaccess.c
+++ b/lib/euidaccess.c
@@ -29,8 +29,11 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
-
-#include "root-uid.h"
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# include <io.h>
+#else
+# include "root-uid.h"
+#endif
 
 #if HAVE_LIBGEN_H
 # include <libgen.h>
@@ -84,7 +87,9 @@ euidaccess (const char *file, int mode)
   return accessx (file, mode, ACC_SELF);
 #elif HAVE_EACCESS                      /* FreeBSD */
   return eaccess (file, mode);
-#else       /* Mac OS X, NetBSD, OpenBSD, HP-UX, Solaris, Cygwin, mingw, BeOS */
+#elif (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__  /* mingw */
+  return _access (file, mode);
+#else              /* Mac OS X, NetBSD, OpenBSD, HP-UX, Solaris, Cygwin, BeOS */
 
   uid_t uid = getuid ();
   gid_t gid = getgid ();
diff --git a/lib/time_rz.c b/lib/time_rz.c
index c1eca888f2c..5293c7cf8dc 100644
--- a/lib/time_rz.c
+++ b/lib/time_rz.c
@@ -286,6 +286,21 @@ revert_tz (timezone_t tz)
 struct tm *
 localtime_rz (timezone_t tz, time_t const *t, struct tm *tm)
 {
+#ifdef HAVE_LOCALTIME_INFLOOP_BUG
+  /* The -67768038400665599 comes from:
+     https://lists.gnu.org/r/bug-gnulib/2017-07/msg00142.html
+     On affected platforms the greatest POSIX-compatible time_t value
+     that could return nonnull is 67768036191766798 (when
+     TZ="XXX24:59:59" it resolves to the year 2**31 - 1 + 1900, on
+     12-31 at 23:59:59), so test for that too while we're in the
+     neighborhood.  */
+  if (! (-67768038400665599 <= *t && *t <= 67768036191766798))
+    {
+      errno = EOVERFLOW;
+      return NULL;
+    }
+#endif
+
   if (!tz)
     return gmtime_r (t, tm);
   else