old_env_value
extern int old_env_var, old_env_value, env_auto;
old_env_value = OLD_ENV_VAR;
old_env_value = OLD_ENV_VALUE;
old_env_value = OLD_ENV_VAR;
int old_env_value = OLD_ENV_VALUE;
old_env_value = OLD_ENV_VALUE;
*opt_replyp++ = old_env_value;
extern int old_env_var, old_env_value;
if (old_env_value == OLD_ENV_VAR)