support systemd service convention for runtime directory

[dpdk.git] / lib / eal / linux / eal.c

diff --git a/lib/eal/linux/eal.c b/lib/eal/linux/eal.c
index e37372a..e9764f6 100644 (file)
--- a/lib/eal/linux/eal.c
+++ b/lib/eal/linux/eal.c
@@ -86,25 +86,28 @@ struct lcore_config lcore_config[RTE_MAX_LCORE];
 /* used by rte_rdtsc() */
 int rte_cycles_vmware_tsc_map;
 
-static const char *default_runtime_dir = "/var/run";
-
 int
 eal_create_runtime_dir(void)
 {
-       const char *directory = default_runtime_dir;
-       const char *xdg_runtime_dir = getenv("XDG_RUNTIME_DIR");
-       const char *fallback = "/tmp";
+       const char *directory;
        char run_dir[PATH_MAX];
        char tmp[PATH_MAX];
        int ret;
 
-       if (getuid() != 0) {
-               /* try XDG path first, fall back to /tmp */
-               if (xdg_runtime_dir != NULL)
-                       directory = xdg_runtime_dir;
+       /* from RuntimeDirectory= see systemd.exec */
+       directory = getenv("RUNTIME_DIRECTORY");
+       if (directory == NULL) {
+               /*
+                * Used standard convention defined in
+                * XDG Base Directory Specification and
+                * Filesystem Hierarchy Standard.
+                */
+               if (getuid() == 0)
+                       directory = "/var/run";
                else
-                       directory = fallback;
+                       directory = getenv("XDG_RUNTIME_DIR") ? : "/tmp";
        }
+
        /* create DPDK subdirectory under runtime dir */
        ret = snprintf(tmp, sizeof(tmp), "%s/dpdk", directory);
        if (ret < 0 || ret == sizeof(tmp)) {