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Re: Emacs on windows and GnuTLS


From: Ted Zlatanov
Subject: Re: Emacs on windows and GnuTLS
Date: Sun, 03 Nov 2013 06:33:57 -0500
User-agent: Gnus/5.130008 (Ma Gnus v0.8) Emacs/24.3.50 (gnu/linux)

On Fri, 1 Nov 2013 23:13:21 +0100 Fabrice Popineau <address@hidden> wrote: 

FP> I wanted to check that GnuTLS is ok on my Emacs installation
FP> and after doing:

FP> (require 'gnutls)

FP> (setq gnutls-log-level 2)
FP> (open-gnutls-stream "tls" "tls-buffer" "imap.gmail.com" "imaps")

FP> I find these annoying messages:

FP> gnutls.c: [1] (Emacs) non-fatal error: Resource temporarily unavailable,
FP> try again.
FP> gnutls.c: [2] ASSERT: gnutls_buffers.c:1015

FP> gnutls.c: [2] ASSERT: gnutls_buffers.c:508

FP> gnutls.c: [1] (Emacs) non-fatal error: Resource temporarily unavailable,
FP> try again.
FP> gnutls.c: [2] ASSERT: gnutls_buffers.c:1015

FP> thousands of times.

The ASERTs are coming from GnuTLS itself.  You'll have to raise the
`gnutls-log-level' to 1 or 0.  The non-fatal retries are probably
network-related.  We don't have a way, IIRC, to tell the error's
severity in advance so we always issue it at level 1.  But I have a note
in gnutls.c:

      GNUTLS_LOG2 (1, max_log_level, "non-fatal error:", str);
      /* TODO: EAGAIN AKA Qgnutls_e_again should be level 2.  */

so specifically for GNUTLS_EAGAIN we can go up to level 3.  Could you
try that change on your own?  See below for suggested patch.  I will
install if it works for you.

FP> I'm not sure it is even harmful.
FP> Any idea what could be wrong there ?

Not harmful, just annoying :)

Ted

=== modified file 'src/gnutls.c'
--- src/gnutls.c        2013-10-17 06:42:21 +0000
+++ src/gnutls.c        2013-11-03 11:31:16 +0000
@@ -487,9 +487,13 @@
     }
   else
     {
+      bool eagain = (err == GNUTLS_E_AGAIN);
+      int level =  eagain ? 1 : 3;
       ret = 1;
-      GNUTLS_LOG2 (1, max_log_level, "non-fatal error:", str);
-      /* TODO: EAGAIN AKA Qgnutls_e_again should be level 2.  */
+      GNUTLS_LOG2 (level,
+                   max_log_level,
+                   eagain ? "retry:" : "non-fatal error:",
+                   str);
     }
 
   if (err == GNUTLS_E_WARNING_ALERT_RECEIVED





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