commit 7aa173007fc3109c0de4604153f2e71bf2de2629
Author: Dave Mielke <Dave@Mielke.cc>
Date:   Fri Jun 18 05:59:30 2021 -0400

    Set the sticky bit on the BrAPI sockets directory. (dm)

diff --git a/Programs/brlapi_server.c b/Programs/brlapi_server.c
index c567264fb..0eb346b7e 100644
--- a/Programs/brlapi_server.c
+++ b/Programs/brlapi_server.c
@@ -3056,18 +3056,18 @@ adjustPermissions (
 
   if (adjust) {
     struct stat status;
-
     if (!getStatus(object, &status)) return 0;
 
     {
       mode_t oldPermissions = status.st_mode & ~S_IFMT;
       mode_t newPermissions = oldPermissions;
 
-#ifdef S_IRGRP
+      #ifdef S_IRGRP
       if (oldPermissions & S_IRUSR) newPermissions |= S_IRGRP | S_IROTH;
       if (oldPermissions & S_IWUSR) newPermissions |= S_IWGRP | S_IWOTH;
       if (oldPermissions & S_IXUSR) newPermissions |= S_IXGRP | S_IXOTH;
-#endif
+      if (S_ISDIR(status.st_mode)) newPermissions |= S_ISVTX | S_IXOTH;
+      #endif
 
       if (newPermissions != oldPermissions) {
         if (!setPermissions(object, newPermissions)) {