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bug#13149: 24.3.50; Emacs thinks file was changed outside Emacs, but it


From: Paul Eggert
Subject: bug#13149: 24.3.50; Emacs thinks file was changed outside Emacs, but it was not
Date: Fri, 01 Feb 2013 14:22:00 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2

On 02/01/13 14:14, Drew Adams wrote:

> No, sorry.  I don't build Emacs.  If there is a Lisp change I can test that, 
> but
> not a C change.

I suppose I could install this patch into the trunk instead,
temporarily.  Eli, do you think it'd be a good idea?

=== modified file 'src/fileio.c'
--- src/fileio.c        2013-02-01 20:51:12 +0000
+++ src/fileio.c        2013-02-01 22:19:12 +0000
@@ -5051,6 +5051,26 @@ This calls `write-region-annotate-functi
                  st.st_size = st1.st_size;
                  modtime = modtime1;
                }
+
+#ifdef DOS_NT
+             /* Temporary hack to diagnose file time stamp bug.  */
+             {
+               char format[sizeof "write-region ? .000000000 .000000000: %s"
+                           + 2 * INT_STRLEN_BOUND (long)];
+               if (valid_timestamp_file_system
+                   && st.st_dev == timestamp_file_system)
+                 sprintf (format, "write-region = %ld.%09d: %%s",
+                          (long) EMACS_SECS (modtime),
+                          (int) EMACS_NSECS (modtime));
+               else
+                 sprintf (format, "write-region ? %ld.%09d %ld.%09d: %%s",
+                          (long) EMACS_SECS (modtime),
+                          (int) EMACS_NSECS (modtime),
+                          (long) EMACS_SECS (modtime1),
+                          (int) EMACS_NSECS (modtime1));
+               add_to_log (format, filename, Qnil);
+             }
+#endif
            }
          emacs_close (desc1);
        }







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