test: Make testing work on systems without or old systemd

* Introduce a macro to conditionally execute tests. This avoids
  skipping the entire test if some parts require systemd
* Skip the journal tests when no /etc/machine-id is present
* Change test-catalog to load the catalog from the source directory
  of systemd.
* /proc/PID/comm got introduced in v2.6.33 but travis is still
  using v2.6.32.
* Enable make check and make distcheck on the travis build
* Use -D"CATALOG_DIR=STR($(abs_top_srcdir)/catalog)" as a STRINGIY
  would result in the path '/home/ich/source/linux' to be expanded
  to '/home/ich/source/1' as linux is defined to 1.

11 files changed, 87 insertions, 13 deletions

diff --git a/src/journal/test-catalog.c b/src/journal/test-catalog.c
index 987867f0c8..5db5bed8de 100644
--- a/src/journal/test-catalog.c
+++ b/src/journal/test-catalog.c
@@ -31,6 +31,16 @@
 #include "sd-messages.h"
 #include "catalog.h"
 
+static const char *catalog_dirs[] = {
+        CATALOG_DIR,
+        NULL,
+};
+
+static const char *no_catalog_dirs[] = {
+        "/bin/hopefully/with/no/catalog",
+        NULL
+};
+
 static void test_import(Hashmap *h, struct strbuf *sb,
                         const char* contents, ssize_t size, int code) {
         int r;
@@ -100,9 +110,13 @@ static void test_catalog_update(void) {
         r = catalog_update(database, NULL, NULL);
         assert(r >= 0);
 
-        /* Note: this might actually not find anything, if systemd was
-         * not installed before. That should be fine too. */
-        r = catalog_update(database, NULL, catalog_file_dirs);
+        /* Test what happens if there are no files in the directory. */
+        r = catalog_update(database, NULL, no_catalog_dirs);
+        assert(r >= 0);
+
+        /* Make sure that we at least have some files loaded or the
+           catalog_list below will fail. */
+        r = catalog_update(database, NULL, catalog_dirs);
         assert(r >= 0);
 }
 
diff --git a/src/journal/test-journal-interleaving.c b/src/journal/test-journal-interleaving.c
index 069d297a9f..2b21523f57 100644
--- a/src/journal/test-journal-interleaving.c
+++ b/src/journal/test-journal-interleaving.c
@@ -288,6 +288,10 @@ static void test_sequence_numbers(void) {
 int main(int argc, char *argv[]) {
         log_set_max_level(LOG_DEBUG);
 
+        /* journal_file_open requires a valid machine id */
+        if (access("/etc/machine-id", F_OK) != 0)
+                return EXIT_TEST_SKIP;
+
         arg_keep = argc > 1;
 
         test_skip(setup_sequential);
diff --git a/src/journal/test-journal-stream.c b/src/journal/test-journal-stream.c
index 6b32b252e8..8e1d08d596 100644
--- a/src/journal/test-journal-stream.c
+++ b/src/journal/test-journal-stream.c
@@ -80,6 +80,10 @@ int main(int argc, char *argv[]) {
         const void *data;
         size_t l;
 
+        /* journal_file_open requires a valid machine id */
+        if (access("/etc/machine-id", F_OK) != 0)
+                return EXIT_TEST_SKIP;
+
         log_set_max_level(LOG_DEBUG);
 
         assert_se(mkdtemp(t));
diff --git a/src/journal/test-journal-verify.c b/src/journal/test-journal-verify.c
index 6b7414a4b1..0540074207 100644
--- a/src/journal/test-journal-verify.c
+++ b/src/journal/test-journal-verify.c
@@ -77,6 +77,10 @@ int main(int argc, char *argv[]) {
         struct stat st;
         uint64_t p;
 
+        /* journal_file_open requires a valid machine id */
+        if (access("/etc/machine-id", F_OK) != 0)
+                return EXIT_TEST_SKIP;
+
         log_set_max_level(LOG_DEBUG);
 
         assert_se(mkdtemp(t));
diff --git a/src/journal/test-journal.c b/src/journal/test-journal.c
index 534fd28fa6..190c426eba 100644
--- a/src/journal/test-journal.c
+++ b/src/journal/test-journal.c
@@ -174,6 +174,10 @@ static void test_empty(void) {
 int main(int argc, char *argv[]) {
         arg_keep = argc > 1;
 
+        /* journal_file_open requires a valid machine id */
+        if (access("/etc/machine-id", F_OK) != 0)
+                return EXIT_TEST_SKIP;
+
         test_non_empty();
         test_empty();
 
diff --git a/src/test/test-cgroup-util.c b/src/test/test-cgroup-util.c
index 295bb02e3b..16bf968340 100644
--- a/src/test/test-cgroup-util.c
+++ b/src/test/test-cgroup-util.c
@@ -23,6 +23,7 @@
 
 #include "util.h"
 #include "cgroup-util.h"
+#include "test-helper.h"
 
 static void check_p_d_u(const char *path, int code, const char *result) {
         _cleanup_free_ char *unit = NULL;
@@ -239,9 +240,9 @@ int main(void) {
         test_path_get_session();
         test_path_get_owner_uid();
         test_path_get_machine_name();
-        test_get_paths();
+        TEST_REQ_RUNNING_SYSTEMD(test_get_paths());
         test_proc();
-        test_escape();
+        TEST_REQ_RUNNING_SYSTEMD(test_escape());
         test_controller_is_valid();
         test_slice_to_path();
 
diff --git a/src/test/test-helper.h b/src/test/test-helper.h
new file mode 100644
index 0000000000..92864edb54
--- /dev/null
+++ b/src/test/test-helper.h
@@ -0,0 +1,31 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Holger Hans Peter Freyther
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "sd-daemon.h"
+
+#define TEST_REQ_RUNNING_SYSTEMD(x)                                 \
+	if (sd_booted() > 0) {                                      \
+		x;                                                  \
+        } else {                                                    \
+                printf("systemd not booted skipping '%s'\n", #x);   \
+        }
diff --git a/src/test/test-id128.c b/src/test/test-id128.c
index 2ed8e292e6..7b92758174 100644
--- a/src/test/test-id128.c
+++ b/src/test/test-id128.c
@@ -25,6 +25,7 @@
 
 #include "util.h"
 #include "macro.h"
+#include "sd-daemon.h"
 
 #define ID128_WALDI SD_ID128_MAKE(01, 02, 03, 04, 05, 06, 07, 08, 09, 0a, 0b, 0c, 0d, 0e, 0f, 10)
 #define STR_WALDI "0102030405060708090a0b0c0d0e0f10"
@@ -41,11 +42,13 @@ int main(int argc, char *argv[]) {
         assert_se(sd_id128_from_string(t, &id2) == 0);
         assert_se(sd_id128_equal(id, id2));
 
-        assert_se(sd_id128_get_machine(&id) == 0);
-        printf("machine: %s\n", sd_id128_to_string(id, t));
+        if (sd_booted() > 0) {
+                assert_se(sd_id128_get_machine(&id) == 0);
+                printf("machine: %s\n", sd_id128_to_string(id, t));
 
-        assert_se(sd_id128_get_boot(&id) == 0);
-        printf("boot: %s\n", sd_id128_to_string(id, t));
+                assert_se(sd_id128_get_boot(&id) == 0);
+                printf("boot: %s\n", sd_id128_to_string(id, t));
+        }
 
         printf("waldi: %s\n", sd_id128_to_string(ID128_WALDI, t));
         assert_se(streq(t, STR_WALDI));
diff --git a/src/test/test-unit-file.c b/src/test/test-unit-file.c
index 2075e86115..dc6bc55244 100644
--- a/src/test/test-unit-file.c
+++ b/src/test/test-unit-file.c
@@ -35,6 +35,7 @@
 #include "load-fragment.h"
 #include "strv.h"
 #include "fileio.h"
+#include "test-helper.h"
 
 static int test_unit_file_get_set(void) {
         int r;
@@ -366,7 +367,7 @@ int main(int argc, char *argv[]) {
         test_load_env_file_2();
         test_load_env_file_3();
         test_load_env_file_4();
-        test_install_printf();
+        TEST_REQ_RUNNING_SYSTEMD(test_install_printf());
 
         return r;
 }
diff --git a/src/test/test-unit-name.c b/src/test/test-unit-name.c
index 6776ef0857..c17692b845 100644
--- a/src/test/test-unit-name.c
+++ b/src/test/test-unit-name.c
@@ -34,6 +34,7 @@
 #include "specifier.h"
 #include "util.h"
 #include "macro.h"
+#include "test-helper.h"
 
 static void test_replacements(void) {
 #define expect(pattern, repl, expected)                            \
@@ -196,6 +197,8 @@ static int test_unit_printf(void) {
 }
 
 int main(int argc, char* argv[]) {
+        int rc = 0;
         test_replacements();
-        return test_unit_printf();
+        TEST_REQ_RUNNING_SYSTEMD(rc = test_unit_printf());
+        return rc;
 }
diff --git a/src/test/test-util.c b/src/test/test-util.c
index 875aeab3d5..dd7768d36c 100644
--- a/src/test/test-util.c
+++ b/src/test/test-util.c
@@ -397,6 +397,7 @@ static void test_u64log2(void) {
 }
 
 static void test_get_process_comm(void) {
+        struct stat st;
         _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL;
         unsigned long long b;
         pid_t e;
@@ -405,8 +406,12 @@ static void test_get_process_comm(void) {
         dev_t h;
         int r;
 
-        assert_se(get_process_comm(1, &a) >= 0);
-        log_info("pid1 comm: '%s'", a);
+        if (stat("/proc/1/comm", &st) == 0) {
+                assert_se(get_process_comm(1, &a) >= 0);
+                log_info("pid1 comm: '%s'", a);
+        } else {
+                log_warning("/proc/1/comm does not exist.");
+        }
 
         assert_se(get_starttime_of_pid(1, &b) >= 0);
         log_info("pid1 starttime: '%llu'", b);