journal: skip part of test-journal-interleaving if no machine-id exists

When executed on a systemd with an empty /etc/machine-id,
test-journal-interleaving fails in test_sequence_numbers_one() when
re-opening the existing "two.journal". This is because opening the
existing journal file with managed_journal_file_open() causes
journal_file_verify_header() to be called. This function tries to
compare the current machine-id to the machine-id in the journal file
header, but does not handle the case where the machine-id is empty or
non-existent.

Check if we have an initialized machine-id before executing this portion
of the test.

1 files changed, 16 insertions, 11 deletions

diff --git a/src/journal/test-journal-interleaving.c b/src/journal/test-journal-interleaving.c
index 7939574c37..379a0c8caf 100644
--- a/src/journal/test-journal-interleaving.c
+++ b/src/journal/test-journal-interleaving.c
@@ -3,6 +3,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 
+#include "sd-id128.h"
 #include "sd-journal.h"
 
 #include "alloc-util.h"
@@ -262,22 +263,26 @@ static void test_sequence_numbers_one(void) {
 
         test_close(one);
 
-        /* restart server */
-        seqnum = 0;
+        /* If the machine-id is not initialized, the header file verification
+         * (which happens when re-opening a journal file) will fail. */
+        if (sd_id128_get_machine(NULL) >= 0) {
+                /* restart server */
+                seqnum = 0;
 
-        assert_se(managed_journal_file_open(-1, "two.journal", O_RDWR, JOURNAL_COMPRESS, 0,
-                                            UINT64_MAX, NULL, m, NULL, NULL, &two) == 0);
+                assert_se(managed_journal_file_open(-1, "two.journal", O_RDWR, JOURNAL_COMPRESS, 0,
+                                                    UINT64_MAX, NULL, m, NULL, NULL, &two) == 0);
 
-        assert_se(sd_id128_equal(two->file->header->seqnum_id, seqnum_id));
+                assert_se(sd_id128_equal(two->file->header->seqnum_id, seqnum_id));
 
-        append_number(two, 7, &seqnum);
-        printf("seqnum=%"PRIu64"\n", seqnum);
-        assert_se(seqnum == 5);
+                append_number(two, 7, &seqnum);
+                printf("seqnum=%"PRIu64"\n", seqnum);
+                assert_se(seqnum == 5);
 
-        /* So..., here we have the same seqnum in two files with the
-         * same seqnum_id. */
+                /* So..., here we have the same seqnum in two files with the
+                 * same seqnum_id. */
 
-        test_close(two);
+                test_close(two);
+        }
 
         log_info("Done...");