bus: add new API for kdbus memfd functionality

1 files changed, 85 insertions, 0 deletions

diff --git a/src/libsystemd-bus/test-bus-memfd.c b/src/libsystemd-bus/test-bus-memfd.c
new file mode 100644
index 0000000000..4c5ae21a8c
--- /dev/null
+++ b/src/libsystemd-bus/test-bus-memfd.c
@@ -0,0 +1,85 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2013 Lennart Poettering
+
+  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 <sys/mman.h>
+
+#include "log.h"
+#include "macro.h"
+#include "util.h"
+
+#include "sd-memfd.h"
+
+int main(int argc, char *argv[]) {
+        sd_memfd *m;
+        char *s;
+        uint64_t sz;
+        int r, fd;
+
+        log_set_max_level(LOG_DEBUG);
+
+        r = sd_memfd_new(&m);
+        if (r == -ENOENT)
+                return EXIT_TEST_SKIP;
+
+        r = sd_memfd_map(m, 0, 6, (void**) &s);
+        assert_se(r >= 0);
+
+        strcpy(s, "hallo");
+        assert_se(munmap(s, 6) == 0);
+
+        assert_se(write(sd_memfd_get_fd(m), "he", 2) == 2);
+
+        r = sd_memfd_get_sealed(m);
+        assert_se(r == 0);
+
+        r = sd_memfd_set_sealed(m, 1);
+        assert_se(r >= 0);
+
+        r = sd_memfd_get_sealed(m);
+        assert_se(r == 1);
+
+        r = sd_memfd_get_size(m, &sz);
+        assert_se(r >= 0);
+        assert_se(sz = page_size());
+
+        r = sd_memfd_set_size(m, 6);
+        assert_se(r >= 0);
+
+        fd = sd_memfd_dup_fd(m);
+        assert_se(fd >= 0);
+
+        sd_memfd_free(m);
+
+        r = sd_memfd_make(fd, &m);
+        assert_se(r >= 0);
+
+        r = sd_memfd_get_size(m, &sz);
+        assert_se(r >= 0);
+        assert_se(sz = 6);
+
+        r = sd_memfd_map(m, 0, 6, (void**) &s);
+        assert_se(r >= 0);
+
+        assert_se(streq(s, "hello"));
+        assert_se(munmap(s, 6) == 0);
+
+        return 0;
+}