machine: use sd_json_variant_append_arraybo() and JSON_BUILD_PAIR_VARIANT_NON_NULL()

Follow-up for 45755275e5ae747bf79e6c7bdd9a055711ebc71f.

1 files changed, 17 insertions, 24 deletions

diff --git a/src/machine/machined-varlink.c b/src/machine/machined-varlink.c
index 2c2eb2d918..723c755f70 100644
--- a/src/machine/machined-varlink.c
+++ b/src/machine/machined-varlink.c
@@ -392,56 +392,49 @@ static int vl_method_get_memberships(sd_varlink *link, sd_json_variant *paramete
 }
 
 static int json_build_local_addresses(const struct local_address *addresses, size_t n_addresses, sd_json_variant **ret) {
+        _cleanup_(sd_json_variant_unrefp) sd_json_variant *array = NULL;
         int r;
 
-        if (n_addresses == 0)
-                return 0;
-
-        assert(addresses);
+        assert(addresses || n_addresses == 0);
         assert(ret);
 
         FOREACH_ARRAY(a, addresses, n_addresses) {
-                _cleanup_(sd_json_variant_unrefp) sd_json_variant *entry = NULL;
-                r = sd_json_buildo(
-                                &entry,
+                r = sd_json_variant_append_arraybo(
+                                &array,
                                 JSON_BUILD_PAIR_UNSIGNED_NON_ZERO("ifindex", a->ifindex),
                                 SD_JSON_BUILD_PAIR_INTEGER("family", a->family),
                                 SD_JSON_BUILD_PAIR_BYTE_ARRAY("address", &a->address.bytes, FAMILY_ADDRESS_SIZE(a->family)));
                 if (r < 0)
                         return r;
-
-                r = sd_json_variant_append_array(ret, entry);
-                if (r < 0)
-                        return r;
         }
 
+        *ret = TAKE_PTR(array);
         return 0;
 }
 
 static int list_machine_one_and_maybe_read_metadata(sd_varlink *link, Machine *m, bool more, AcquireMetadata am) {
-        _cleanup_(sd_json_variant_unrefp) sd_json_variant *addr_array = NULL;
+        _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL, *addr_array = NULL;
         _cleanup_strv_free_ char **os_release = NULL;
         uid_t shift = UID_INVALID;
-        int r, n = 0;
+        int r;
 
         assert(link);
         assert(m);
 
-        _cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
-
         if (should_acquire_metadata(am)) {
                 _cleanup_free_ struct local_address *addresses = NULL;
-                n = machine_get_addresses(m, &addresses);
-                if (n < 0 && am == ACQUIRE_METADATA_GRACEFUL)
-                        log_debug_errno(n, "Failed to get address (graceful mode), ignoring: %m");
-                else if (n == -ENONET)
+
+                r = machine_get_addresses(m, &addresses);
+                if (r < 0 && am == ACQUIRE_METADATA_GRACEFUL)
+                        log_debug_errno(r, "Failed to get address (graceful mode), ignoring: %m");
+                else if (r == -ENONET)
                         return sd_varlink_error(link, "io.systemd.Machine.NoPrivateNetworking", NULL);
-                else if (ERRNO_IS_NEG_NOT_SUPPORTED(n))
+                else if (ERRNO_IS_NEG_NOT_SUPPORTED(r))
                         return sd_varlink_error(link, "io.systemd.Machine.NotAvailable", NULL);
-                else if (n < 0)
-                        return log_debug_errno(n, "Failed to get addresses: %m");
+                else if (r < 0)
+                        return log_debug_errno(r, "Failed to get addresses: %m");
                 else {
-                        r = json_build_local_addresses(addresses, n, &addr_array);
+                        r = json_build_local_addresses(addresses, r, &addr_array);
                         if (r < 0)
                                 return r;
                 }
@@ -480,7 +473,7 @@ static int list_machine_one_and_maybe_read_metadata(sd_varlink *link, Machine *m
                         SD_JSON_BUILD_PAIR_CONDITION(m->vsock_cid != VMADDR_CID_ANY, "vSockCid", SD_JSON_BUILD_UNSIGNED(m->vsock_cid)),
                         JSON_BUILD_PAIR_STRING_NON_EMPTY("sshAddress", m->ssh_address),
                         JSON_BUILD_PAIR_STRING_NON_EMPTY("sshPrivateKeyPath", m->ssh_private_key_path),
-                        SD_JSON_BUILD_PAIR_CONDITION(n > 0, "addresses", SD_JSON_BUILD_VARIANT(addr_array)),
+                        JSON_BUILD_PAIR_VARIANT_NON_NULL("addresses", addr_array),
                         SD_JSON_BUILD_PAIR_CONDITION(!strv_isempty(os_release), "OSRelease", JSON_BUILD_STRV_ENV_PAIR(os_release)),
                         JSON_BUILD_PAIR_UNSIGNED_NOT_EQUAL("UIDShift", shift, UID_INVALID));
         if (r < 0)