Fix some shadowed-global warnings.

These are all about local variables shadowing global
functions. That isn't normally a problem, but at least one
compiler we care about seems to treat this as a case of -Wshadow
violation, so let's fix it.

Fixes bug 24634; bugfix on 0.3.2.1-alpha.

changes/bug24634

@@ -0,0 +1,3 @@
+  o Minor bugfixes (compilation):
+    - Resolve a few shadowed-variable warnings in the onion service code.
+      Fixes bug 24634; bugfix on 0.3.2.1-alpha.

src/or/hs_common.c

@@ -984,18 +984,18 @@ hs_build_address(const ed25519_public_key_t *key, uint8_t version,
 link_specifier_t *
 hs_link_specifier_dup(const link_specifier_t *lspec)
 {
-  link_specifier_t *dup = link_specifier_new();
-  memcpy(dup, lspec, sizeof(*dup));
+  link_specifier_t *result = link_specifier_new();
+  memcpy(result, lspec, sizeof(*result));
   /* The unrecognized field is a dynamic array so make sure to copy its
    * content and not the pointer. */
   link_specifier_setlen_un_unrecognized(
-                        dup, link_specifier_getlen_un_unrecognized(lspec));
-  if (link_specifier_getlen_un_unrecognized(dup)) {
-    memcpy(link_specifier_getarray_un_unrecognized(dup),
+                  result, link_specifier_getlen_un_unrecognized(lspec));
+  if (link_specifier_getlen_un_unrecognized(result)) {
+    memcpy(link_specifier_getarray_un_unrecognized(result),
            link_specifier_getconstarray_un_unrecognized(lspec),
-           link_specifier_getlen_un_unrecognized(dup));
+           link_specifier_getlen_un_unrecognized(result));
   }
-  return dup;
+  return result;
 }
 
 /* From a given ed25519 public key pk and an optional secret, compute a

src/or/hs_service.c

@@ -1190,9 +1190,9 @@ setup_desc_intro_point(const ed25519_keypair_t *signing_kp,
   /* Copy link specifier(s). */
   SMARTLIST_FOREACH_BEGIN(ip->base.link_specifiers,
                           const hs_desc_link_specifier_t *, ls) {
-    hs_desc_link_specifier_t *dup = tor_malloc_zero(sizeof(*dup));
-    link_specifier_copy(dup, ls);
-    smartlist_add(desc_ip->link_specifiers, dup);
+    hs_desc_link_specifier_t *copy = tor_malloc_zero(sizeof(*copy));
+    link_specifier_copy(copy, ls);
+    smartlist_add(desc_ip->link_specifiers, copy);
   } SMARTLIST_FOREACH_END(ls);
 
   /* For a legacy intro point, we'll use an RSA/ed cross certificate. */
@@ -2276,15 +2276,15 @@ upload_descriptor_to_hsdir(const hs_service_t *service,
   /* Logging so we know where it was sent. */
   {
     int is_next_desc = (service->desc_next == desc);
-    const uint8_t *index = (is_next_desc) ? hsdir->hsdir_index->store_second:
-                                            hsdir->hsdir_index->store_first;
+    const uint8_t *idx = (is_next_desc) ? hsdir->hsdir_index->store_second:
+                                          hsdir->hsdir_index->store_first;
     log_info(LD_REND, "Service %s %s descriptor of revision %" PRIu64
                       " initiated upload request to %s with index %s",
              safe_str_client(service->onion_address),
              (is_next_desc) ? "next" : "current",
              desc->desc->plaintext_data.revision_counter,
              safe_str_client(node_describe(hsdir)),
-             safe_str_client(hex_str((const char *) index, 32)));
+             safe_str_client(hex_str((const char *) idx, 32)));
   }
 
   /* XXX: Inform control port of the upload event (#20699). */

src/test/test_hs_common.c

@@ -971,12 +971,12 @@ helper_init_service(time_t now)
 
 /* Helper function to set the RFC 1123 time string into t. */
 static void
-set_consensus_times(const char *time, time_t *t)
+set_consensus_times(const char *timestr, time_t *t)
 {
-  tt_assert(time);
+  tt_assert(timestr);
   tt_assert(t);
 
-  int ret = parse_rfc1123_time(time, t);
+  int ret = parse_rfc1123_time(timestr, t);
   tt_int_op(ret, OP_EQ, 0);
 
  done: