socket-test: don't try to be clever, fail if no XDG_RUNTIME_DIR is set

Not only setenv(), also putenv() allocates memory on my system
(glibc 2.16.0). Just fail with a clear message if XDG_RUNTIME_DIR is
not set.

https://bugs.freedesktop.org/show_bug.cgi?id=52618

diff --git a/tests/socket-test.c b/tests/socket-test.c
index 0ee5ad0..f0c06f4 100644 (file)
--- a/tests/socket-test.c
+++ b/tests/socket-test.c
@@ -36,17 +36,20 @@ static const struct sockaddr_un example_sockaddr_un;
 
 #define TOO_LONG (1 + sizeof example_sockaddr_un.sun_path)
 
+/* Ensure the connection doesn't fail due to lack of XDG_RUNTIME_DIR. */
+static void require_xdg_runtime_dir()
+{
+       char *val = getenv("XDG_RUNTIME_DIR");
+       if (!val)
+               assert(0 && "set $XDG_RUNTIME_DIR to run this test");
+}
+
 TEST(socket_path_overflow_client_connect)
 {
        char path[TOO_LONG];
        struct wl_display *d;
-       int ret;
 
-       /* Ensure the connection doesn't fail due to lack of
-          XDG_RUNTIME_DIR. Don't use setenv(), as that allocates
-          memory and creates a spurious memory leak failure. */
-       ret = putenv("XDG_RUNTIME_DIR=.");
-       assert(ret == 0);
+       require_xdg_runtime_dir();
 
        memset(path, 'a', sizeof path);
        path[sizeof path - 1] = '\0';
@@ -62,11 +65,7 @@ TEST(socket_path_overflow_server_create)
        struct wl_display *d;
        int ret;
 
-       /* Ensure the connection doesn't fail due to lack of
-          XDG_RUNTIME_DIR. Don't use setenv(), as that allocates
-          memory and creates a spurious memory leak failure. */
-       ret = putenv("XDG_RUNTIME_DIR=.");
-       assert(ret == 0);
+       require_xdg_runtime_dir();
 
        memset(path, 'a', sizeof path);
        path[sizeof path - 1] = '\0';