From bd7e44720b212defebb7df47f85d5f393b2cb108 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Thu, 5 Aug 2021 20:48:28 +0200
Subject: -proper fix for endless loop on IPC permission trouble

---
 src/util/crypto_helper_denom.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'src/util/crypto_helper_denom.c')

diff --git a/src/util/crypto_helper_denom.c b/src/util/crypto_helper_denom.c
index f55d2cd82..168699b4e 100644
--- a/src/util/crypto_helper_denom.c
+++ b/src/util/crypto_helper_denom.c
@@ -434,6 +434,7 @@ TALER_CRYPTO_helper_denom_poll (struct TALER_CRYPTO_DenominationHelper *dh)
 {
   char buf[UINT16_MAX];
   ssize_t ret;
+  unsigned int retry_limit = 10;
   const struct GNUNET_MessageHeader *hdr
     = (const struct GNUNET_MessageHeader *) buf;
   int flag = MSG_DONTWAIT;
@@ -462,11 +463,18 @@ TALER_CRYPTO_helper_denom_poll (struct TALER_CRYPTO_DenominationHelper *dh)
           GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                       "Restarting connection to RSA helper, did not come up properly\n");
           do_disconnect (dh);
+          if (0 == retry_limit)
+            return; /* give up */
           try_connect (dh);
           if (-1 == dh->sock)
             return; /* give up */
+          retry_limit--;
+          flag = MSG_DONTWAIT;
+        }
+        else
+        {
+          flag = 0; /* syscall must be non-blocking this time */
         }
-        flag = 0; /* syscall must be non-blocking this time */
         continue; /* try again */
       }
       GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING,
@@ -474,7 +482,7 @@ TALER_CRYPTO_helper_denom_poll (struct TALER_CRYPTO_DenominationHelper *dh)
       do_disconnect (dh);
       return;
     }
-
+    retry_limit = 10;
     flag = MSG_DONTWAIT;
     if ( (ret < sizeof (struct GNUNET_MessageHeader)) ||
          (ret != ntohs (hdr->size)) )
-- 
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