+#define topt_output_string 0x200 /* create string rather than write to fd */
+#define topt_continuation 0x400 /* do not reset buffer */
+
+/* Options for smtp_write_command */
+
+enum {
+ SCMD_FLUSH = 0, /* write to kernel */
+ SCMD_MORE, /* write to kernel, but likely more soon */
+ SCMD_BUFFER /* stash in application cmd output buffer */
+};