libsystemd-bus: rename to libsystemd

[elogind.git] / src / libsystemd / test-bus-memfd.c

diff --git a/src/libsystemd/test-bus-memfd.c b/src/libsystemd/test-bus-memfd.c
new file mode 100644 (file)
index 0000000..b9d6a25
--- /dev/null
+++ b/src/libsystemd/test-bus-memfd.c
@@ -0,0 +1,174 @@
+/*-*- 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 <sys/uio.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;
+        FILE *f;
+        char buf[3] = {};
+        struct iovec iov[3] = {};
+        char bufv[3][3] = {};
+
+        log_set_max_level(LOG_DEBUG);
+
+        r = sd_memfd_new(&m);
+        if (r == -ENOENT)
+                return EXIT_TEST_SKIP;
+
+        r = sd_memfd_map(m, 0, 12, (void**) &s);
+        assert_se(r >= 0);
+
+        strcpy(s, "----- world");
+
+        r = sd_memfd_set_sealed(m, 1);
+        assert_se(r == -ETXTBSY);
+
+        assert_se(write(sd_memfd_get_fd(m), "he", 2) == 2);
+        assert_se(write(sd_memfd_get_fd(m), "XXX", 3) == 3);
+        assert_se(streq(s, "heXXX world"));
+
+        /* fix "hello" */
+        assert_se(lseek(sd_memfd_get_fd(m), 2, SEEK_SET) == 2);
+        assert_se(write(sd_memfd_get_fd(m), "ll", 2) == 2);
+
+        assert_se(sd_memfd_get_file(m, &f) >= 0);
+        fputc('o', f);
+        fflush(f);
+
+        /* check content  */
+        assert_se(streq(s, "hello world"));
+
+        assert_se(munmap(s, 12) == 0);
+
+        r = sd_memfd_get_sealed(m);
+        assert_se(r == 0);
+
+        r = sd_memfd_get_size(m, &sz);
+        assert_se(r >= 0);
+        assert_se(sz = page_size());
+
+        /* truncate it */
+        r = sd_memfd_set_size(m, 6);
+        assert_se(r >= 0);
+
+        /* get back new value */
+        r = sd_memfd_get_size(m, &sz);
+        assert_se(r >= 0);
+        assert_se(sz == 6);
+
+        r = sd_memfd_set_sealed(m, 1);
+        assert_se(r >= 0);
+
+        r = sd_memfd_get_sealed(m);
+        assert_se(r == 1);
+
+        fd = sd_memfd_dup_fd(m);
+        assert_se(fd >= 0);
+
+        sd_memfd_free(m);
+
+        /* new sd_memfd, same underlying memfd */
+        r = sd_memfd_make(fd, &m);
+        assert_se(r >= 0);
+
+        /* we did truncate it to 6 */
+        r = sd_memfd_get_size(m, &sz);
+        assert_se(r >= 0 && sz == 6);
+
+        /* map it, check content */
+        r = sd_memfd_map(m, 0, 12, (void **)&s);
+        assert_se(r >= 0);
+
+        /* we only see the truncated size */
+        assert_se(streq(s, "hello "));
+
+        /* it was already sealed */
+        r = sd_memfd_set_sealed(m, 1);
+        assert_se(r == -EALREADY);
+
+        /* we cannot break the seal, it is mapped */
+        r = sd_memfd_set_sealed(m, 0);
+        assert_se(r == -ETXTBSY);
+
+        /* unmap it; become the single owner */
+        assert_se(munmap(s, 12) == 0);
+
+        /* now we can do flip the sealing */
+        r = sd_memfd_set_sealed(m, 0);
+        assert_se(r == 0);
+        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_set_sealed(m, 0);
+        assert_se(r == 0);
+        r = sd_memfd_get_sealed(m);
+        assert_se(r == 0);
+
+        /* seek at 2, read() 2 bytes */
+        assert_se(lseek(fd, 2, SEEK_SET) == 2);
+        assert_se(read(fd, buf, 2) == 2);
+
+        /* check content */
+        assert_se(memcmp(buf, "ll", 2) == 0);
+
+        /* writev it out*/
+        iov[0].iov_base = (char *)"ABC";
+        iov[0].iov_len = 3;
+        iov[1].iov_base = (char *)"DEF";
+        iov[1].iov_len = 3;
+        iov[2].iov_base = (char *)"GHI";
+        iov[2].iov_len = 3;
+        assert_se(pwritev(fd, iov, 3, 0) == 9);
+
+        /* readv it back */
+        iov[0].iov_base = bufv[0];
+        iov[0].iov_len = 3;
+        iov[1].iov_base = bufv[1];
+        iov[1].iov_len = 3;
+        iov[2].iov_base = bufv[2];
+        iov[2].iov_len = 3;
+        assert_se(preadv(fd, iov, 3, 0) == 9);
+
+        /* check content */
+        assert_se(memcmp(bufv[0], "ABC", 3) == 0);
+        assert_se(memcmp(bufv[1], "DEF", 3) == 0);
+        assert_se(memcmp(bufv[2], "GHI", 3) == 0);
+
+        sd_memfd_free(m);
+
+        return 0;
+}