process-util: also disable dlopen() in safe_fork()

src/libsystemd/meson.build

@@ -203,7 +203,6 @@ simple_tests += files(
         'sd-bus/test-bus-vtable.c',
         'sd-device/test-device-util.c',
         'sd-device/test-sd-device-monitor.c',
-        'sd-device/test-sd-device.c',
         'sd-journal/test-journal-flush.c',
         'sd-journal/test-journal-interleaving.c',
         'sd-journal/test-journal-stream.c',
@@ -214,6 +213,10 @@ simple_tests += files(
 )
 
 libsystemd_tests += [
+        {
+                'sources' : files('sd-device/test-sd-device.c'),
+                'dependencies' : [ threads, libmount_cflags ],
+        },
         {
                 'sources' : files('sd-bus/test-bus-address.c'),
                 'dependencies' : threads

src/libsystemd/sd-device/test-sd-device.c

@@ -13,6 +13,7 @@
 #include "fd-util.h"
 #include "fs-util.h"
 #include "hashmap.h"
+#include "libmount-util.h"
 #include "mkdir.h"
 #include "mount-util.h"
 #include "mountpoint-util.h"
@@ -833,8 +834,14 @@ TEST(devname_from_devnum) {
 }
 
 static int intro(void) {
+        int r;
+
         if (path_is_mount_point("/sys") <= 0)
-                return log_tests_skipped("/sys is not mounted");
+                return log_tests_skipped("/sys/ is not mounted");
+
+        r = dlopen_libmount();
+        if (r < 0)
+                return log_tests_skipped("libmount not available.");
 
         return EXIT_SUCCESS;
 }