Close bug#3992.

* lib-src/emacsclient.c (set_local_socket) [DARWIN_OS]: Try as a fall-back
DARWIN_USER_TEMP_DIR.

1 files changed, 12 insertions, 1 deletions

diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c
index 01241b518bb..05f01b3b097 100644
--- a/lib-src/emacsclient.c
+++ b/lib-src/emacsclient.c
@@ -1249,7 +1249,18 @@ set_local_socket ()
       {
         tmpdir = egetenv ("TMPDIR");
         if (!tmpdir)
-          tmpdir = "/tmp";
+          {
+#ifdef DARWIN_OS
+            size_t n = confstr (_CS_DARWIN_USER_TEMP_DIR, NULL, (size_t) 0);
+            if (n > 0)
+              {
+                tmpdir = alloca (n);
+                confstr (_CS_DARWIN_USER_TEMP_DIR, tmpdir, n);
+              }
+            else
+#endif
+              tmpdir = "/tmp";
+          }
         socket_name = alloca (strlen (tmpdir) + strlen (server_name)
                               + EXTRA_SPACE);
         sprintf (socket_name, "%s/emacs%d/%s",