Various SMTP improvements.

* Makefile.am: Shut up cmp's stderr.
* libmailutils/body.c (_body_get_stream): Set full buffering
mode on the body stream.
* libmailutils/errors (MU_ERR_AUTH_NO_CRED): New error code.
* libproto/mailer/smtp.c (smtp_open): Do not treat
ENOSYS or MU_ERR_AUTH_NO_CRED (returned by mu_smtp_auth) as errors.
(smtp_send_message): Do not try to submit the message if it is
bigger than the maximum imposed by the server.
* libproto/mailer/smtp_auth.c (mu_smtp_auth): Return MU_ERR_AUTH_NO_CRED
if neither user name nor password are supplied.
* mail/send.c (mail_send0): Issue diagnostics if
sending attempt has failed.

@@ -162,7 +162,8 @@ git-describe:
 		test -n "$$dirty" && dirty="-dirty"; \
 		descr=`git describe`; \
 		echo $${descr}$$dirty > git-describe.tmp; \
-		test -f git-describe && cmp git-describe.tmp git-describe || \
+		test -f git-describe && \
+                  cmp git-describe.tmp git-describe >/dev/null || \
 		  cp git-describe.tmp git-describe; \
 	        rm git-describe.tmp; \
 	fi
@@ -183,7 +184,8 @@ git-describe.h: git-describe
 	else \
           echo "/* No git tag */"; \
 	fi > git-describe.h.tmp; \
-	test -f git-describe.h && cmp git-describe.h.tmp git-describe.h || \
+	test -f git-describe.h && \
+          cmp git-describe.h.tmp git-describe.h >/dev/null || \
           cp git-describe.h.tmp git-describe.h; \
 	rm git-describe.h.tmp
 

@@ -183,6 +183,7 @@ _body_get_stream (mu_body_t body, mu_stream_t *pstream, int ref)
 					  body->filename, MU_STREAM_RDWR);
 	  if (status != 0)
 	    return status;
+	  mu_stream_set_buffer (body->fstream, mu_buffer_full, 0);
 	  status = mu_stream_open (body->fstream);
 	  if (status != 0)
 	    return status;

@@ -93,3 +93,4 @@ MU_ERR_BAD_FILENAME         _("Badly formed file or directory name")
 MU_ERR_READ                 _("Read error")
 
 MU_ERR_NO_TRANSPORT         _("Transport stream not set")
+MU_ERR_AUTH_NO_CRED         _("No credentials supplied")

@@ -124,9 +124,11 @@ smtp_open (mu_mailer_t mailer, int flags)
   if (mu_debug_check_level (mailer->debug, MU_DEBUG_PROT))
     mu_smtp_trace (smtp_mailer->smtp, MU_SMTP_TRACE_SET);
   if (mu_debug_check_level (mailer->debug, MU_DEBUG_TRACE6))
-    mu_smtp_trace_mask (smtp_mailer->smtp, MU_SMTP_TRACE_SET, MU_XSCRIPT_SECURE);
+    mu_smtp_trace_mask (smtp_mailer->smtp, MU_SMTP_TRACE_SET,
+			MU_XSCRIPT_SECURE);
   if (mu_debug_check_level (mailer->debug, MU_DEBUG_TRACE7))
-    mu_smtp_trace_mask (smtp_mailer->smtp, MU_SMTP_TRACE_SET, MU_XSCRIPT_PAYLOAD);
+    mu_smtp_trace_mask (smtp_mailer->smtp, MU_SMTP_TRACE_SET,
+			MU_XSCRIPT_PAYLOAD);
   
   mu_smtp_set_param (smtp_mailer->smtp, MU_SMTP_PARAM_URL,
 		     mu_url_to_string (mailer->url));
@@ -203,9 +205,19 @@ smtp_open (mu_mailer_t mailer, int flags)
   if (!noauth && mu_smtp_capa_test (smtp_mailer->smtp, "AUTH", NULL) == 0)
     {
       rc = mu_smtp_auth (smtp_mailer->smtp);
-      if (rc)
-	return rc;
-      rc = mu_smtp_ehlo (smtp_mailer->smtp);
+      switch (rc)
+	{
+	case 0:
+	  rc = mu_smtp_ehlo (smtp_mailer->smtp);
+	  break;
+	  
+	case ENOSYS:
+	case MU_ERR_AUTH_NO_CRED:
+	  mu_diag_output (MU_DIAG_NOTICE, "authentication disabled: %s",
+			  mu_strerror (rc));
+	  rc = 0; /* Continue anyway */
+	  break;
+	}
       if (rc)
 	return rc;
     }
@@ -377,7 +389,7 @@ smtp_send_message (mu_mailer_t mailer, mu_message_t msg,
   mu_smtp_t smtp = smp->smtp;
   int status;
   size_t size, lines, count;
-  const char *mail_from;
+  const char *mail_from, *size_str;
   mu_header_t     header;
       
   if (mailer == NULL)
@@ -398,12 +410,19 @@ smtp_send_message (mu_mailer_t mailer, mu_message_t msg,
   if (status)
     return status;
   
-  if (mu_smtp_capa_test (smp->smtp, "SIZE", NULL) == 0 &&
+  if (mu_smtp_capa_test (smp->smtp, "SIZE", &size_str) == 0 &&
       mu_message_size (msg, &size) == 0 &&
       mu_message_lines (msg, &lines) == 0)
-    status = mu_smtp_mail_basic (smp->smtp, mail_from,
-				 "SIZE=%lu",
-				 (unsigned long) (size + lines));
+    {
+      size_t msgsize = size + lines;
+      size_t maxsize = strtoul (size_str + 5, NULL, 10);
+
+      if (msgsize && msgsize > maxsize)
+	return EFBIG;
+      status = mu_smtp_mail_basic (smp->smtp, mail_from,
+				   "SIZE=%lu",
+				   (unsigned long) msgsize);
+    }
   else
     status = mu_smtp_mail_basic (smp->smtp, mail_from, NULL);
   if (status)

@@ -141,6 +141,8 @@ mu_smtp_auth (mu_smtp_t smtp)
      default it does that on tty, which obviously will not suite
      GUI applications). */
   _mu_smtp_fixup_params (smtp);
+  if (!smtp->param[MU_SMTP_PARAM_USERNAME] && !smtp->secret)
+    return MU_ERR_AUTH_NO_CRED;
 #if defined(WITH_GSASL)
   return _mu_smtp_gsasl_auth (smtp);
 #else

@@ -308,9 +308,10 @@ fill_body (mu_message_t msg, FILE *file)
   mu_stream_t stream = NULL;
   char *buf = NULL;
   size_t n = 0;
+  int nullbody = 1;
+
   mu_message_get_body (msg, &body);
   mu_body_get_streamref (body, &stream);
-  int nullbody = 1;
   
   while (getline (&buf, &n, file) >= 0)
     {
@@ -651,7 +652,11 @@ mail_send0 (compose_env_t * env, int save_to)
 		  env->header = NULL;
 		  status = send_message (msg);
  		  if (status)
- 		    save_dead_message (env);
+		    {
+		      mu_error (_("cannot send message: %s"),
+				mu_strerror (status));
+		      save_dead_message (env);
+		    }
 		}
 	    }
 	  fclose (env->file);