auth: Drop SIGHUP cache flush handler

The same flush is already exposed as 'doveadm auth cache flush' over
the auth-master UNIX socket, so the SIGHUP handler is redundant.
Removing it also frees SIGHUP for other uses (e.g. anvil sending
SIGHUP to a service whose admin-socket CONFIG-RELOAD timed out).

diff --git a/src/auth/auth-cache.c b/src/auth/auth-cache.c
index 822a41315f60d7ad2c18e1659e0b24510b4b3d1d..bd5cdcc7771046a14d07d6da57230027ec1ded61 100644 (file)
--- a/src/auth/auth-cache.c
+++ b/src/auth/auth-cache.c
@@ -202,14 +202,6 @@ auth_cache_node_destroy(struct auth_cache *cache, struct auth_cache_node *node)
        i_free(node);
 }
 
-static void sig_auth_cache_clear(const siginfo_t *si ATTR_UNUSED, void *context)
-{
-       struct auth_cache *cache = context;
-
-       e_info(cache->event, "SIGHUP received, %u cache entries flushed",
-              auth_cache_clear(cache));
-}
-
 static void sig_auth_cache_stats(const siginfo_t *si ATTR_UNUSED, void *context)
 {
        struct auth_cache *cache = context;
@@ -253,8 +245,6 @@ struct auth_cache *auth_cache_new(size_t max_size, unsigned int ttl_secs,
        cache->neg_ttl_secs = neg_ttl_secs;
        cache->event = event_create(auth_event);
 
-       lib_signals_set_handler(SIGHUP, LIBSIG_FLAGS_SAFE,
-                               sig_auth_cache_clear, cache);
        lib_signals_set_handler(SIGUSR2, LIBSIG_FLAGS_SAFE,
                                sig_auth_cache_stats, cache);
        return cache;
@@ -265,7 +255,6 @@ void auth_cache_free(struct auth_cache **_cache)
        struct auth_cache *cache = *_cache;
 
        *_cache = NULL;
-       lib_signals_unset_handler(SIGHUP, sig_auth_cache_clear, cache);
        lib_signals_unset_handler(SIGUSR2, sig_auth_cache_stats, cache);
 
        auth_cache_clear(cache);