git_exec_path: avoid Coverity warning about unfree()d result

diff --git a/connect.c b/connect.c
index 722dc3fc546056be199f5d6a59c556833be58286..8cb93b0720d9a33d8fc0cddb21c3d1c1a789da96 100644 (file)
--- a/connect.c
+++ b/connect.c
@@ -43,14 +43,14 @@ int check_ref_type(const struct ref *ref, int flags)
        return check_ref(ref->name, flags);
 }
 
-static void die_initial_contact(int got_at_least_one_head)
+static void die_initial_contact(int unexpected)
 {
-       if (got_at_least_one_head)
-               die("The remote end hung up upon initial contact");
+       if (unexpected)
+               die(_("The remote end hung up upon initial contact"));
        else
-               die("Could not read from remote repository.\n\n"
-                   "Please make sure you have the correct access rights\n"
-                   "and the repository exists.");
+               die(_("Could not read from remote repository.\n\n"
+                     "Please make sure you have the correct access rights\n"
+                     "and the repository exists."));
 }
 
 static void parse_one_symref_info(struct string_list *symref, const char *val, int len)
@@ -115,10 +115,18 @@ struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
                              struct sha1_array *shallow_points)
 {
        struct ref **orig_list = list;
-       int got_at_least_one_head = 0;
+
+       /*
+        * A hang-up after seeing some response from the other end
+        * means that it is unexpected, as we know the other end is
+        * willing to talk to us.  A hang-up before seeing any
+        * response does not necessarily mean an ACL problem, though.
+        */
+       int saw_response;
+       int got_dummy_ref_with_capabilities_declaration = 0;
 
        *list = NULL;
-       for (;;) {
+       for (saw_response = 0; ; saw_response = 1) {
                struct ref *ref;
                struct object_id old_oid;
                char *name;
@@ -131,7 +139,7 @@ struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
                                  PACKET_READ_GENTLE_ON_EOF |
                                  PACKET_READ_CHOMP_NEWLINE);
                if (len < 0)
-                       die_initial_contact(got_at_least_one_head);
+                       die_initial_contact(saw_response);
 
                if (!len)
                        break;
@@ -165,13 +173,25 @@ struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
                        continue;
                }
 
+               if (!strcmp(name, "capabilities^{}")) {
+                       if (saw_response)
+                               die("protocol error: unexpected capabilities^{}");
+                       if (got_dummy_ref_with_capabilities_declaration)
+                               die("protocol error: multiple capabilities^{}");
+                       got_dummy_ref_with_capabilities_declaration = 1;
+                       continue;
+               }
+
                if (!check_ref(name, flags))
                        continue;
+
+               if (got_dummy_ref_with_capabilities_declaration)
+                       die("protocol error: unexpected ref after capabilities^{}");
+
                ref = alloc_ref(buffer + GIT_SHA1_HEXSZ + 1);
                oidcpy(&ref->old_oid, &old_oid);
                *list = ref;
                list = &ref->next;
-               got_at_least_one_head = 1;
        }
 
        annotate_refs_with_symref_info(*orig_list);
@@ -730,7 +750,7 @@ struct child_process *git_connect(int fd[2], const char *url,
                 * Note: Do not add any other headers here!  Doing so
                 * will cause older git-daemon servers to crash.
                 */
-               packet_write(fd[1],
+               packet_write_fmt(fd[1],
                             "%s %s%chost=%s%c",
                             prog, path, 0,
                             target_host, 0);