Version reporting & module ABI change.

[exim.git] / src / src / drtables.c

diff --git a/src/src/drtables.c b/src/src/drtables.c
index 276c0e67b87943424816ddd6d3db2e81d22a4d54..563670a38add5b6d5820c0195a912c8f7cf956b1 100644 (file)
--- a/src/src/drtables.c
+++ b/src/src/drtables.c
@@ -21,6 +21,8 @@ all described in src/EDITME. */
 lookup_info **lookup_list;
 int lookup_list_count = 0;
 
+static int lookup_list_init_done = 0;
+
 /* Table of information about all possible authentication mechamisms. All
 entries are always present if any mechanism is declared, but the functions are
 set to NULL for those that are not compiled into the binary. */
@@ -398,6 +400,10 @@ void init_lookup_list(void)
   int moduleerrors = 0;
   struct lookupmodulestr *p;
 
+  if (lookup_list_init_done)
+    return;
+  lookup_list_init_done = 1;
+
 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
 extern lookup_module_info cdb_lookup_module_info;
   addlookupmodule(NULL, &cdb_lookup_module_info);
@@ -518,6 +524,13 @@ extern lookup_module_info whoson_lookup_module_info;
           continue;
         }
 
+        /* FreeBSD nsdispatch() can trigger dlerror() errors about
+         * _nss_cache_cycle_prevention_function; we need to clear the dlerror()
+         * state before calling dlsym(), so that any error afterwards only
+         * comes from dlsym().
+         */
+        errormsg = dlerror();
+
         info = (struct lookup_module_info*) dlsym(dl, "_lookup_module_info");
         if ((errormsg = dlerror()) != NULL) {
           fprintf(stderr, "%s does not appear to be a lookup module (%s)\n", name, errormsg);