From fc58c37e334fec71a204b7b0787d347b647618b8 Mon Sep 17 00:00:00 2001
From: meejah <meejah@meejah.ca>
Date: Sat, 28 Jan 2017 13:49:18 -0700
Subject: Ticket #21329: GETINFO onions/current returns empty list

If there are no ephemeral or detached onion services, then
"GETINFO onions/current" or "GETINFO onions/detached" should
return an empty list instead of an error
---
 src/or/control.c | 13 +++++++------
 src/or/control.h |  5 +++++
 2 files changed, 12 insertions(+), 6 deletions(-)

(limited to 'src/or')

diff --git a/src/or/control.c b/src/or/control.c
index 857b7325ae..cc46cb1aa2 100644
--- a/src/or/control.c
+++ b/src/or/control.c
@@ -2824,12 +2824,13 @@ getinfo_helper_events(control_connection_t *control_conn,
 
 /** Implementation helper for GETINFO: knows how to enumerate hidden services
  * created via the control port. */
-static int
+STATIC int
 getinfo_helper_onions(control_connection_t *control_conn,
                       const char *question, char **answer,
                       const char **errmsg)
 {
   smartlist_t *onion_list = NULL;
+  (void) errmsg;  /* no errors from this method */
 
   if (control_conn && !strcmp(question, "onions/current")) {
     onion_list = control_conn->ephemeral_onion_services;
@@ -2839,13 +2840,13 @@ getinfo_helper_onions(control_connection_t *control_conn,
     return 0;
   }
   if (!onion_list || smartlist_len(onion_list) == 0) {
-    if (errmsg) {
-        *errmsg = "No onion services of the specified type.";
+    if (answer) {
+      *answer = tor_strdup("");
     }
-    return -1;
-  }
-  if (answer) {
+  } else {
+    if (answer) {
       *answer = smartlist_join_strings(onion_list, "\r\n", 0, NULL);
+    }
   }
 
   return 0;
diff --git a/src/or/control.h b/src/or/control.h
index 6330c85571..16ba1ed8f0 100644
--- a/src/or/control.h
+++ b/src/or/control.h
@@ -262,6 +262,11 @@ STATIC crypto_pk_t *add_onion_helper_keyarg(const char *arg, int discard_pk,
 STATIC rend_authorized_client_t *
 add_onion_helper_clientauth(const char *arg, int *created, char **err_msg_out);
 
+STATIC int getinfo_helper_onions(
+    control_connection_t *control_conn,
+    const char *question,
+    char **answer,
+    const char **errmsg);
 STATIC void getinfo_helper_downloads_networkstatus(
     const char *flavor,
     download_status_t **dl_to_emit,
-- 
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