sd-bus: properly support passing memfds around with offset/size parameters

1 files changed, 12 insertions, 2 deletions

diff --git a/src/libsystemd/sd-bus/test-bus-zero-copy.c b/src/libsystemd/sd-bus/test-bus-zero-copy.c
index 2cc671b16d..a054f74bf3 100644
--- a/src/libsystemd/sd-bus/test-bus-zero-copy.c
+++ b/src/libsystemd/sd-bus/test-bus-zero-copy.c
@@ -48,6 +48,7 @@ int main(int argc, char *argv[]) {
         uint32_t u32;
         size_t i, l;
         char *s;
+        _cleanup_close_ int sfd = -1;
 
         log_set_max_level(LOG_DEBUG);
 
@@ -107,7 +108,7 @@ int main(int argc, char *argv[]) {
         assert_se(r >= 0);
         assert_se(sz == STRING_SIZE);
 
-        r = sd_bus_message_append_string_memfd(m, f);
+        r = sd_bus_message_append_string_memfd(m, f, 0, (uint64_t) -1);
         assert_se(r >= 0);
 
         close(f);
@@ -124,7 +125,7 @@ int main(int argc, char *argv[]) {
         assert_se(r >= 0);
         assert_se(sz == SECOND_ARRAY);
 
-        r = sd_bus_message_append_array_memfd(m, 'y', f);
+        r = sd_bus_message_append_array_memfd(m, 'y', f, 0, (uint64_t) -1);
         assert_se(r >= 0);
 
         close(f);
@@ -135,6 +136,11 @@ int main(int argc, char *argv[]) {
         r = sd_bus_message_append(m, "u", 4711);
         assert_se(r >= 0);
 
+        assert_se((sfd = memfd_new_and_map(NULL, 6, (void**) &p)) >= 0);
+        memcpy(p, "abcd\0", 6);
+        munmap(p, 6);
+        assert_se(sd_bus_message_append_string_memfd(m, sfd, 1, 4) >= 0);
+
         r = bus_message_seal(m, 55, 99*USEC_PER_SEC);
         assert_se(r >= 0);
 
@@ -188,6 +194,10 @@ int main(int argc, char *argv[]) {
         assert_se(r > 0);
         assert_se(u32 == 4711);
 
+        r = sd_bus_message_read(m, "s", &s);
+        assert_se(r > 0);
+        assert_se(streq_ptr(s, "bcd"));
+
         sd_bus_message_unref(m);
 
         sd_bus_unref(a);