Import upstream version 1.27

[debian/tar] / gnu / utimens.c

diff --git a/gnu/utimens.c b/gnu/utimens.c
index 6582706e9b69cb9b67fde1bfb6b14734f388f22f..ed7a75f39d98dedf66525ad5beb75925397b62d3 100644 (file)
--- a/gnu/utimens.c
+++ b/gnu/utimens.c
@@ -2,7 +2,7 @@
 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
 /* Set file access and modification times.
 
-   Copyright (C) 2003-2011 Free Software Foundation, Inc.
+   Copyright (C) 2003-2013 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
@@ -23,6 +23,7 @@
 
 #include <config.h>
 
+#define _GL_UTIMENS_INLINE _GL_EXTERN_INLINE
 #include "utimens.h"
 
 #include <assert.h>
@@ -182,18 +183,13 @@ fdutimens (int fd, char const *file, struct timespec const timespec[2])
   if (adjustment_needed < 0)
     return -1;
 
-  /* Require that at least one of FD or FILE are valid.  Works around
+  /* Require that at least one of FD or FILE are potentially valid, to avoid
      a Linux bug where futimens (AT_FDCWD, NULL) changes "." rather
      than failing.  */
-  if (!file)
+  if (fd < 0 && !file)
     {
-      if (fd < 0)
-        {
-          errno = EBADF;
-          return -1;
-        }
-      if (dup2 (fd, fd) != fd)
-        return -1;
+      errno = EBADF;
+      return -1;
     }
 
   /* Some Linux-based NFS clients are buggy, and mishandle time stamps
@@ -222,15 +218,19 @@ fdutimens (int fd, char const *file, struct timespec const timespec[2])
   if (0 <= utimensat_works_really)
     {
       int result;
-# if __linux__
+# if __linux__ || __sun
       /* As recently as Linux kernel 2.6.32 (Dec 2009), several file
          systems (xfs, ntfs-3g) have bugs with a single UTIME_OMIT,
          but work if both times are either explicitly specified or
          UTIME_NOW.  Work around it with a preparatory [f]stat prior
          to calling futimens/utimensat; fortunately, there is not much
          timing impact due to the extra syscall even on file systems
-         where UTIME_OMIT would have worked.  FIXME: Simplify this in
-         2012, when file system bugs are no longer common.  */
+         where UTIME_OMIT would have worked.
+
+         The same bug occurs in Solaris 11.1 (Apr 2013).
+
+         FIXME: Simplify this for Linux in 2016 and for Solaris in
+         2024, when file system bugs are no longer common.  */
       if (adjustment_needed == 2)
         {
           if (fd < 0 ? stat (file, &st) : fstat (fd, &st))
@@ -242,7 +242,7 @@ fdutimens (int fd, char const *file, struct timespec const timespec[2])
           /* Note that st is good, in case utimensat gives ENOSYS.  */
           adjustment_needed++;
         }
-# endif /* __linux__ */
+# endif
 # if HAVE_UTIMENSAT
       if (fd < 0)
         {
@@ -451,15 +451,19 @@ lutimens (char const *file, struct timespec const timespec[2])
   if (0 <= lutimensat_works_really)
     {
       int result;
-# if __linux__
+# if __linux__ || __sun
       /* As recently as Linux kernel 2.6.32 (Dec 2009), several file
          systems (xfs, ntfs-3g) have bugs with a single UTIME_OMIT,
          but work if both times are either explicitly specified or
          UTIME_NOW.  Work around it with a preparatory lstat prior to
          calling utimensat; fortunately, there is not much timing
          impact due to the extra syscall even on file systems where
-         UTIME_OMIT would have worked.  FIXME: Simplify this in 2012,
-         when file system bugs are no longer common.  */
+         UTIME_OMIT would have worked.
+
+         The same bug occurs in Solaris 11.1 (Apr 2013).
+
+         FIXME: Simplify this for Linux in 2016 and for Solaris in
+         2024, when file system bugs are no longer common.  */
       if (adjustment_needed == 2)
         {
           if (lstat (file, &st))
@@ -471,7 +475,7 @@ lutimens (char const *file, struct timespec const timespec[2])
           /* Note that st is good, in case utimensat gives ENOSYS.  */
           adjustment_needed++;
         }
-# endif /* __linux__ */
+# endif
       result = utimensat (AT_FDCWD, file, ts, AT_SYMLINK_NOFOLLOW);
 # ifdef __linux__
       /* Work around a kernel bug: