Re: NULL struct to futimes does not return current date/time on GNU/Hurd

[Samuel Thibault <samuel dot thibault at ens-lyon dot org>]

Hi,

Thomas Schwinge, le Sat 23 Sep 2006 12:48:56 +0200, a écrit :
> +      new_atime = *(time_value_t *) &tvp[0];
> +      new_mtime = *(time_value_t *) &tvp[1];

Mmm, this might break sometime for whatever optimizing compiler reason
too. Why not stop using bogus casts, and rather use:

Index: sysdeps/mach/hurd/futimes.c
===================================================================
RCS file: /cvs/glibc/libc/sysdeps/mach/hurd/futimes.c,v
retrieving revision 1.1
diff -u -p -r1.1 futimes.c
--- sysdeps/mach/hurd/futimes.c	27 Aug 2002 02:09:20 -0000	1.1
+++ sysdeps/mach/hurd/futimes.c	23 Sep 2006 12:29:52 -0000
@@ -28,20 +28,22 @@
 int
 __futimes (int fd, const struct timeval tvp[2])
 {
-  struct timeval timevals[2];
   error_t err;
+  time_value_t new_atime, new_mtime;
 
   if (tvp == NULL)
-    {
       /* Setting the number of microseconds to `-1' tells the
          underlying filesystems to use the current time.  */
-      timevals[1].tv_usec = timevals[0].tv_usec = (time_t)-1;
-      tvp = timevals;
+    new_atime.microseconds = new_mtime.microseconds = -1;
+  else
+    {
+      new_atime.seconds = tvp[0].tv_sec;
+      new_atime.microseconds = tvp[0].tv_usec;
+      new_mtime.seconds = tvp[1].tv_sec;
+      new_mtime.microseconds = tvp[1].tv_usec;
     }
 
-  err = HURD_DPORT_USE (fd, __file_utimes (port,
-					   *(time_value_t *) &tvp[0],
-					   *(time_value_t *) &tvp[1]));
+  err = HURD_DPORT_USE (fd, __file_utimes (port, new_atime, new_mtime));
   return err ? __hurd_dfail (fd, err) : 0;
 }
 weak_alias (__futimes, futimes)

which just precisely explains the compiler what we want, and nothing
more, nothing less.

Samuel