tests: add a program for repetitive opening and closing of the journal

Basically wraps an example provided by George McCollister.
Should help with leaks in the future.

Makefile.am

@@ -2793,6 +2793,14 @@ test_journal_stream_LDADD = \
 	libsystemd-journal-internal.la \
 	libsystemd-id128-internal.la
 
+test_journal_init_SOURCES = \
+	src/journal/test-journal-init.c
+
+test_journal_init_LDADD = \
+	libsystemd-shared.la \
+	libsystemd-daemon-internal.la \
+	libsystemd-journal.la
+
 test_journal_verify_SOURCES = \
 	src/journal/test-journal-verify.c
 
@@ -2983,6 +2991,7 @@ tests += \
 	test-journal-syslog \
 	test-journal-match \
 	test-journal-stream \
+	test-journal-init \
 	test-journal-verify \
 	test-journal-interleaving \
 	test-mmap-cache \

src/journal/test-journal-init.c

@@ -0,0 +1,60 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Zbigniew Jędrzejewski-Szmek
+
+  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 <systemd/sd-journal.h>
+
+#include "log.h"
+#include "util.h"
+
+int main(int argc, char *argv[]) {
+        sd_journal *j;
+        int r, i, I = 100;
+        char t[] = "/tmp/journal-stream-XXXXXX";
+
+        log_set_max_level(LOG_DEBUG);
+
+        if (argc >= 2)
+                safe_atoi(argv[1], &I);
+        log_info("Running %d loops", I);
+
+        assert_se(mkdtemp(t));
+
+        for (i = 0; i < I; i++) {
+                r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
+                assert_se(r == 0);
+
+                sd_journal_close(j);
+
+                r = sd_journal_open_directory(&j, t, 0);
+                assert_se(r == 0);
+
+                sd_journal_close(j);
+
+                j = NULL;
+                r = sd_journal_open_directory(&j, t, SD_JOURNAL_LOCAL_ONLY);
+                assert_se(r == -EINVAL);
+                assert_se(j == NULL);
+        }
+
+        assert_se(rm_rf_dangerous(t, false, true, false) >= 0);
+
+        return 0;
+}

src/journal/test-journal-stream.c

@@ -75,7 +75,7 @@ int main(int argc, char *argv[]) {
         JournalFile *one, *two, *three;
         char t[] = "/tmp/journal-stream-XXXXXX";
         unsigned i;
-        _cleanup_journal_close_ sd_journal*j = NULL;
+        _cleanup_journal_close_ sd_journal *j = NULL;
         char *z;
         const void *data;
         size_t l;