144       char *path = xreadlink ("/proc/self/exe");  in set_program_path()  local
145       if (path)  in set_program_path()
146         program_path = dir_name (path);  in set_program_path()
147       else if ((path = getenv ("PATH")))  in set_program_path()
150           path = xstrdup (path);  in set_program_path()
151           for (dir = strtok (path, ":"); dir != nullptr;  in set_program_path()
164       free (path);  in set_program_path()
223   char const *const *path = search_path;  in set_LD_PRELOAD()  local
230       if (!**path)              /* system default  */  in set_LD_PRELOAD()
235       ret = asprintf (&libstdbuf, "%s/%s", *path, LIB_NAME);  in set_LD_PRELOAD()
242       ++path;  in set_LD_PRELOAD()
243       if ( ! *path)  in set_LD_PRELOAD()