Fix bug #12587 with slow startup on MS-Windows with Netlogon service.

 src/fileio.c (check_existing): New function.
 (make_temp_name, Ffile_exists_p, Ffile_writable_p): Call it
 instead of calling 'stat', when what's needed is to check whether
 a file exists.  This avoids expensive system calls on MS-Windows.
 src/w32.c (init_environment): Call 'check_existing' instead of 'stat'.
 src/lread.c (openp) [WINDOWSNT]: Call 'access' instead of 'stat' to
 determine whether a file exists and is not a directory.
 src/lisp.h (check_existing): Add prototype.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 47b2de24844..76f0226c0bf 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,19 @@
+2012-10-12  Eli Zaretskii  <eliz@gnu.org>
+
+        * fileio.c (check_existing): New function.
+        (make_temp_name, Ffile_exists_p, Ffile_writable_p): Call it
+        instead of calling 'stat', when what's needed is to check whether
+        a file exists.  This avoids expensive system calls on MS-Windows.
+        (Bug#12587)
+
+        * w32.c (init_environment): Call 'check_existing' instead of
+        'stat'.
+
+        * lread.c (openp) [WINDOWSNT]: Call 'access' instead of 'stat' to
+        determine whether a file exists and is not a directory.
+
+        * lisp.h (check_existing): Add prototype.
+
 2012-10-12  Jan Djärv  <jan.h.d@swipnet.se>
 
         * nsfont.m (nsfont_open): Remove font cache, it is not GC correct.