redis lookup returns false for things that should be true

If redis returns an integer the lookup code currently checks if the value is 1 and returns false for all other values.
This is problematic if you want to use redis commands that return counts (ZCARD etc.) because you can't check for "does not exist" or "exists at least once". (It will be 0->false, 1->true, 2 or more-> false again)

This commit changes the code to handle integer values like C: 0 is false and everything else is true.

For the simple 0 and 1 values nothing changes to existing queries so this diff is backwards compatible.
For queries that return other values exim now gets the bool that would be expected.

diff --git a/src/src/lookups/redis.c b/src/src/lookups/redis.c
index 87cc9fd1af8f92b9a83c9e178a74a5c35bd6903e..ac4d0ec301063a92a367c25e9fa6a70777e95e32 100644 (file)
--- a/src/src/lookups/redis.c
+++ b/src/src/lookups/redis.c
@@ -211,7 +211,7 @@ perform_redis_search(uschar *command, uschar *server, uschar **resultptr,
 
                break;
        case REDIS_REPLY_INTEGER:
-               ttmp = (redis_reply->integer == 1) ? US"true" : US"false";
+               ttmp = (redis_reply->integer != 0) ? US"true" : US"false";
                result = string_cat(result, &ssize, &offset, US ttmp, Ustrlen(ttmp));
                break;
        case REDIS_REPLY_STRING: