-try to fix Florian's FIXME/endless loop, alas without test as Florian did not provide enough details for that

src/util/crypto_helper_denom.c

@@ -145,19 +145,11 @@ try_connect (struct TALER_CRYPTO_DenominationHelper *dh)
   /* Fix permissions on client UNIX domain socket,
      just in case umask() is not set to enable group write */
   {
-    char path[sizeof (dh->my_sa) + 1];
-
-    strncpy (path,
-             (const char *) &dh->my_sa,
-             sizeof (dh->my_sa));
-    path[sizeof (dh->my_sa)] = '\0';
-
-    {
-      char path[sizeof (dh->sa.sun_path) + 1];
+    char path[sizeof (dh->my_sa.sun_path) + 1];
 
     strncpy (path,
              dh->my_sa.sun_path,
-               sizeof (dh->my_sa.sun_path));
+             sizeof (path) - 1);
     path[sizeof (dh->my_sa.sun_path)] = '\0';
 
     if (0 != chmod (path,
@@ -168,7 +160,6 @@ try_connect (struct TALER_CRYPTO_DenominationHelper *dh)
                                 path);
     }
   }
-  }
   GNUNET_free (tmpdir);
   {
     struct GNUNET_MessageHeader hdr = {
@@ -445,6 +436,7 @@ TALER_CRYPTO_helper_denom_poll (struct TALER_CRYPTO_DenominationHelper *dh)
   ssize_t ret;
   const struct GNUNET_MessageHeader *hdr
     = (const struct GNUNET_MessageHeader *) buf;
+  int flag = MSG_DONTWAIT;
 
   try_connect (dh);
   if (-1 == dh->sock)
@@ -454,11 +446,14 @@ TALER_CRYPTO_helper_denom_poll (struct TALER_CRYPTO_DenominationHelper *dh)
     ret = recv (dh->sock,
                 buf,
                 sizeof (buf),
-                MSG_DONTWAIT);
+                flag);
     if (ret < 0)
     {
       if (EAGAIN == errno)
       {
+        /* EAGAIN should only happen if we did not
+           already go through this loop */
+        GNUNET_assert (0 != flag);
         if (dh->synced)
           break;
         if (! await_read_ready (dh))
@@ -471,7 +466,7 @@ TALER_CRYPTO_helper_denom_poll (struct TALER_CRYPTO_DenominationHelper *dh)
           if (-1 == dh->sock)
             return; /* give up */
         }
-        /* FIXME: We should not retry infinitely */
+        flag = 0; /* syscall must be non-blocking this time */
         continue; /* try again */
       }
       GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
@@ -480,6 +475,7 @@ TALER_CRYPTO_helper_denom_poll (struct TALER_CRYPTO_DenominationHelper *dh)
       return;
     }
 
+    flag = MSG_DONTWAIT;
     if ( (ret < sizeof (struct GNUNET_MessageHeader)) ||
          (ret != ntohs (hdr->size)) )
     {

src/util/crypto_helper_esign.c

@@ -146,11 +146,11 @@ try_connect (struct TALER_CRYPTO_ExchangeSignHelper *esh)
   /* Fix permissions on client UNIX domain socket,
      just in case umask() is not set to enable group write */
   {
-    char path[sizeof (esh->sa.sun_path) + 1];
+    char path[sizeof (esh->my_sa.sun_path) + 1];
 
     strncpy (path,
              esh->my_sa.sun_path,
-             sizeof (esh->my_sa.sun_path));
+             sizeof (path) - 1);
     path[sizeof (esh->my_sa.sun_path)] = '\0';
 
     if (0 != chmod (path,
@@ -393,6 +393,7 @@ TALER_CRYPTO_helper_esign_poll (struct TALER_CRYPTO_ExchangeSignHelper *esh)
   ssize_t ret;
   const struct GNUNET_MessageHeader *hdr
     = (const struct GNUNET_MessageHeader *) buf;
+  int flag = MSG_DONTWAIT;
 
   try_connect (esh);
   if (-1 == esh->sock)
@@ -402,11 +403,12 @@ TALER_CRYPTO_helper_esign_poll (struct TALER_CRYPTO_ExchangeSignHelper *esh)
     ret = recv (esh->sock,
                 buf,
                 sizeof (buf),
-                MSG_DONTWAIT);
+                flag);
     if (ret < 0)
     {
       if (EAGAIN == errno)
       {
+        GNUNET_assert (0 != flag);
         if (esh->synced)
           break;
         if (! await_read_ready (esh))
@@ -419,6 +421,7 @@ TALER_CRYPTO_helper_esign_poll (struct TALER_CRYPTO_ExchangeSignHelper *esh)
           if (-1 == esh->sock)
             return; /* give up */
         }
+        flag = 0; /* syscall must be non-blocking this time */
         continue; /* try again */
       }
       GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
@@ -427,6 +430,7 @@ TALER_CRYPTO_helper_esign_poll (struct TALER_CRYPTO_ExchangeSignHelper *esh)
       return;
     }
 
+    flag = MSG_DONTWAIT;
     if ( (ret < sizeof (struct GNUNET_MessageHeader)) ||
          (ret != ntohs (hdr->size)) )
     {

src/util/taler-exchange-secmod-rsa.c

@@ -883,8 +883,9 @@ setup_key (struct DenominationKey *dk,
   }
   GNUNET_free (buf);
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-              "Setup fresh private key %s in `%s'\n",
+              "Setup fresh private key %s at %s in `%s'\n",
               GNUNET_h2s (&dk->h_denom_pub),
+              GNUNET_STRINGS_absolute_time_to_string (dk->anchor),
               dk->filename);
   dk->denom_priv.rsa_private_key = priv;
   dk->denom_pub.rsa_public_key = pub;

src/util/test_helper_rsa.c

@@ -146,6 +146,7 @@ key_cb (void *cls,
 
     return;
   }
+
   GNUNET_break (NULL != denom_pub);
   for (unsigned int i = 0; i<MAX_KEYS; i++)
     if (! keys[i].valid)
@@ -253,6 +254,7 @@ test_signing (struct TALER_CRYPTO_DenominationHelper *dh)
     {
       void *buf;
       size_t buf_size;
+
       GNUNET_assert (GNUNET_YES ==
                      TALER_rsa_blind (&m_hash,
                                       &bks,