bus: extend memfd test

TODO

@@ -29,6 +29,8 @@ Fedora 19:
 
 Features:
 
+* maybe add "journalctl -k" as shortcut for "-b _TRANSPORT=kernel"
+
 * Introduce a way how we can kill the main process of a service with KillSignal, but all processes with SIGKILL later on
   https://bugzilla.redhat.com/show_bug.cgi?id=952634
 

src/libsystemd-bus/sd-memfd.c

@@ -106,7 +106,7 @@ int sd_memfd_get_file(sd_memfd *m, FILE **f) {
         if (!f)
                 return -EINVAL;
 
-        if (!m->fd) {
+        if (!m->f) {
                 m->f = fdopen(m->fd, "r+");
                 if (!m->f)
                         return -errno;

src/libsystemd-bus/test-bus-memfd.c

@@ -32,6 +32,7 @@ int main(int argc, char *argv[]) {
         char *s;
         uint64_t sz;
         int r, fd;
+        FILE *f;
 
         log_set_max_level(LOG_DEBUG);
 
@@ -43,19 +44,32 @@ int main(int argc, char *argv[]) {
         assert_se(r >= 0);
 
         strcpy(s, "hallo");
-        assert_se(munmap(s, 6) == 0);
+
+        r = sd_memfd_set_sealed(m, 1);
+        assert_se(r == -EPERM);
 
         assert_se(write(sd_memfd_get_fd(m), "he", 2) == 2);
+        assert_se(write(sd_memfd_get_fd(m), "HE", 2) == 2);
+
+        log_error("lseek = %llu", (unsigned long long) lseek(sd_memfd_get_fd(m), 0, SEEK_CUR));
+
+        log_info("<%s>", s);
+
+        access("HUHU", F_OK);
+
+        assert_se(sd_memfd_get_file(m, &f) >= 0);
+        fputc('L', f);
+        fflush(f);
+
+        access("HAHA", F_OK);
+
+        log_info("<%s>", s);
+
+        assert_se(munmap(s, 6) == 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_get_size(m, &sz);
         assert_se(r >= 0);
         assert_se(sz = page_size());
@@ -63,6 +77,12 @@ int main(int argc, char *argv[]) {
         r = sd_memfd_set_size(m, 6);
         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);
+
         fd = sd_memfd_dup_fd(m);
         assert_se(fd >= 0);
 
@@ -78,8 +98,21 @@ int main(int argc, char *argv[]) {
         r = sd_memfd_map(m, 0, 6, (void**) &s);
         assert_se(r >= 0);
 
-        assert_se(streq(s, "hello"));
+        r = sd_memfd_set_sealed(m, 1);
+        assert_se(r == -EALREADY);
+
+        r = sd_memfd_set_sealed(m, 0);
+        assert_se(r == -EPERM);
+
+        log_info("<%s>", s);
+
+        assert_se(streq(s, "heLlo"));
         assert_se(munmap(s, 6) == 0);
 
+        r = sd_memfd_set_sealed(m, 0);
+        assert_se(r >= 0);
+
+        sd_memfd_free(m);
+
         return 0;
 }