1 /*
2  * Copyright (c) 1983 Eric P. Allman
3  * Copyright (c) 1988 Regents of the University of California.
4  * All rights reserved.
5  *
6  * %sccs.include.redist.c%
7  */
8 
9 # include "sendmail.h"
10 
11 #ifndef lint
12 #ifdef SMTP
13 static char sccsid[] = "@(#)srvrsmtp.c	6.40 (Berkeley) 04/09/93 (with SMTP)";
14 #else
15 static char sccsid[] = "@(#)srvrsmtp.c	6.40 (Berkeley) 04/09/93 (without SMTP)";
16 #endif
17 #endif /* not lint */
18 
19 # include <errno.h>
20 # include <signal.h>
21 
22 # ifdef SMTP
23 
24 /*
25 **  SMTP -- run the SMTP protocol.
26 **
27 **	Parameters:
28 **		none.
29 **
30 **	Returns:
31 **		never.
32 **
33 **	Side Effects:
34 **		Reads commands from the input channel and processes
35 **			them.
36 */
37 
38 struct cmd
39 {
40 	char	*cmdname;	/* command name */
41 	int	cmdcode;	/* internal code, see below */
42 };
43 
44 /* values for cmdcode */
45 # define CMDERROR	0	/* bad command */
46 # define CMDMAIL	1	/* mail -- designate sender */
47 # define CMDRCPT	2	/* rcpt -- designate recipient */
48 # define CMDDATA	3	/* data -- send message text */
49 # define CMDRSET	4	/* rset -- reset state */
50 # define CMDVRFY	5	/* vrfy -- verify address */
51 # define CMDEXPN	6	/* expn -- expand address */
52 # define CMDNOOP	7	/* noop -- do nothing */
53 # define CMDQUIT	8	/* quit -- close connection and die */
54 # define CMDHELO	9	/* helo -- be polite */
55 # define CMDHELP	10	/* help -- give usage info */
56 # define CMDEHLO	11	/* ehlo -- extended helo (RFC 1425) */
57 /* non-standard commands */
58 # define CMDONEX	16	/* onex -- sending one transaction only */
59 # define CMDVERB	17	/* verb -- go into verbose mode */
60 /* debugging-only commands, only enabled if SMTPDEBUG is defined */
61 # define CMDDBGQSHOW	24	/* showq -- show send queue */
62 # define CMDDBGDEBUG	25	/* debug -- set debug mode */
63 
64 static struct cmd	CmdTab[] =
65 {
66 	"mail",		CMDMAIL,
67 	"rcpt",		CMDRCPT,
68 	"data",		CMDDATA,
69 	"rset",		CMDRSET,
70 	"vrfy",		CMDVRFY,
71 	"expn",		CMDEXPN,
72 	"help",		CMDHELP,
73 	"noop",		CMDNOOP,
74 	"quit",		CMDQUIT,
75 	"helo",		CMDHELO,
76 	"ehlo",		CMDEHLO,
77 	"verb",		CMDVERB,
78 	"onex",		CMDONEX,
79 	/*
80 	 * remaining commands are here only
81 	 * to trap and log attempts to use them
82 	 */
83 	"showq",	CMDDBGQSHOW,
84 	"debug",	CMDDBGDEBUG,
85 	NULL,		CMDERROR,
86 };
87 
88 bool	InChild = FALSE;		/* true if running in a subprocess */
89 bool	OneXact = FALSE;		/* one xaction only this run */
90 
91 #define EX_QUIT		22		/* special code for QUIT command */
92 
93 smtp(e)
94 	register ENVELOPE *e;
95 {
96 	register char *p;
97 	register struct cmd *c;
98 	char *cmd;
99 	static char *skipword();
100 	auto ADDRESS *vrfyqueue;
101 	ADDRESS *a;
102 	bool gotmail;			/* mail command received */
103 	bool gothello;			/* helo command received */
104 	bool vrfy;			/* set if this is a vrfy command */
105 	char *protocol;			/* sending protocol */
106 	char *sendinghost;		/* sending hostname */
107 	long msize;			/* approximate maximum message size */
108 	auto char *delimptr;
109 	char *id;
110 	char inp[MAXLINE];
111 	char cmdbuf[MAXLINE];
112 	extern char Version[];
113 	extern char *macvalue();
114 	extern ADDRESS *recipient();
115 	extern ENVELOPE BlankEnvelope;
116 	extern ENVELOPE *newenvelope();
117 	extern char *anynet_ntoa();
118 
119 	if (OutChannel != stdout)
120 	{
121 		/* arrange for debugging output to go to remote host */
122 		(void) close(1);
123 		(void) dup(fileno(OutChannel));
124 	}
125 	settime(e);
126 	CurHostName = RealHostName;
127 	setproctitle("srvrsmtp %s", CurHostName);
128 	expand("\201e", inp, &inp[sizeof inp], e);
129 	message("220 %s", inp);
130 	SmtpPhase = "startup";
131 	protocol = NULL;
132 	sendinghost = macvalue('s', e);
133 	gothello = FALSE;
134 	gotmail = FALSE;
135 	for (;;)
136 	{
137 		/* arrange for backout */
138 		if (setjmp(TopFrame) > 0 && InChild)
139 			finis();
140 		QuickAbort = FALSE;
141 		HoldErrs = FALSE;
142 		LogUsrErrs = FALSE;
143 		e->e_flags &= ~EF_VRFYONLY;
144 
145 		/* setup for the read */
146 		e->e_to = NULL;
147 		Errors = 0;
148 		(void) fflush(stdout);
149 
150 		/* read the input line */
151 		p = sfgets(inp, sizeof inp, InChannel, TimeOuts.to_nextcommand);
152 
153 		/* handle errors */
154 		if (p == NULL)
155 		{
156 			/* end of file, just die */
157 			message("421 %s Lost input channel from %s",
158 				MyHostName, CurHostName);
159 #ifdef LOG
160 			if (LogLevel > 1)
161 				syslog(LOG_NOTICE, "lost input channel from %s",
162 					CurHostName);
163 #endif
164 			if (InChild)
165 				ExitStat = EX_QUIT;
166 			finis();
167 		}
168 
169 		/* clean up end of line */
170 		fixcrlf(inp, TRUE);
171 
172 		/* echo command to transcript */
173 		if (e->e_xfp != NULL)
174 			fprintf(e->e_xfp, "<<< %s\n", inp);
175 
176 		/* break off command */
177 		for (p = inp; isascii(*p) && isspace(*p); p++)
178 			continue;
179 		cmd = cmdbuf;
180 		while (*p != '\0' &&
181 		       !(isascii(*p) && isspace(*p)) &&
182 		       cmd < &cmdbuf[sizeof cmdbuf - 2])
183 			*cmd++ = *p++;
184 		*cmd = '\0';
185 
186 		/* throw away leading whitespace */
187 		while (isascii(*p) && isspace(*p))
188 			p++;
189 
190 		/* decode command */
191 		for (c = CmdTab; c->cmdname != NULL; c++)
192 		{
193 			if (!strcasecmp(c->cmdname, cmdbuf))
194 				break;
195 		}
196 
197 		/* reset errors */
198 		errno = 0;
199 
200 		/* process command */
201 		switch (c->cmdcode)
202 		{
203 		  case CMDHELO:		/* hello -- introduce yourself */
204 		  case CMDEHLO:		/* extended hello */
205 			if (c->cmdcode == CMDEHLO)
206 			{
207 				protocol = "ESMTP";
208 				SmtpPhase = "EHLO";
209 			}
210 			else
211 			{
212 				protocol = "SMTP";
213 				SmtpPhase = "HELO";
214 			}
215 			setproctitle("%s: %s", CurHostName, inp);
216 			sendinghost = newstr(p);
217 			if (strcasecmp(p, RealHostName) != 0)
218 			{
219 				auth_warning(e, "Host %s claimed to be %s",
220 					RealHostName, p);
221 			}
222 			p = macvalue('_', e);
223 			if (p == NULL)
224 				p = RealHostName;
225 
226 			/* send ext. message -- old systems must ignore */
227 			message("250-%s Hello %s, pleased to meet you",
228 				MyHostName, p);
229 			if (!bitset(PRIV_NOEXPN, PrivacyFlags))
230 				message("250-EXPN");
231 			message("250-SIZE");
232 			message("250 HELP");
233 			gothello = TRUE;
234 			break;
235 
236 		  case CMDMAIL:		/* mail -- designate sender */
237 			SmtpPhase = "MAIL";
238 
239 			/* check for validity of this command */
240 			if (!gothello)
241 			{
242 				/* set sending host to our known value */
243 				if (sendinghost == NULL)
244 					sendinghost = RealHostName;
245 
246 				if (bitset(PRIV_NEEDMAILHELO, PrivacyFlags))
247 				{
248 					message("503 Polite people say HELO first");
249 					break;
250 				}
251 				else
252 				{
253 					auth_warning(e,
254 						"Host %s didn't use HELO protocol",
255 						RealHostName);
256 				}
257 			}
258 			if (gotmail)
259 			{
260 				message("503 Sender already specified");
261 				break;
262 			}
263 			if (InChild)
264 			{
265 				errno = 0;
266 				syserr("503 Nested MAIL command: MAIL %s", p);
267 				finis();
268 			}
269 
270 			/* fork a subprocess to process this command */
271 			if (runinchild("SMTP-MAIL", e) > 0)
272 				break;
273 			if (protocol == NULL)
274 				protocol = "SMTP";
275 			define('r', protocol, e);
276 			define('s', sendinghost, e);
277 			initsys(e);
278 			setproctitle("%s %s: %s", e->e_id, CurHostName, inp);
279 
280 			/* child -- go do the processing */
281 			p = skipword(p, "from");
282 			if (p == NULL)
283 				break;
284 			if (setjmp(TopFrame) > 0)
285 			{
286 				/* this failed -- undo work */
287 				if (InChild)
288 					finis();
289 				break;
290 			}
291 			QuickAbort = TRUE;
292 
293 			/* must parse sender first */
294 			delimptr = NULL;
295 			setsender(p, e, &delimptr, FALSE);
296 			p = delimptr;
297 			if (p != NULL && *p != '\0')
298 				*p++ = '\0';
299 
300 			/* now parse ESMTP arguments */
301 			msize = 0;
302 			for (; p != NULL && *p != '\0'; p++)
303 			{
304 				char *kp;
305 				char *vp;
306 
307 				/* locate the beginning of the keyword */
308 				while (isascii(*p) && isspace(*p))
309 					p++;
310 				if (*p == '\0')
311 					break;
312 				kp = p;
313 
314 				/* skip to the value portion */
315 				while (isascii(*p) && isalnum(*p) || *p == '-')
316 					p++;
317 				if (*p == '=')
318 				{
319 					*p++ = '\0';
320 					vp = p;
321 
322 					/* skip to the end of the value */
323 					while (*p != '\0' && *p != ' ' &&
324 					       !(isascii(*p) && iscntrl(*p)) &&
325 					       *p != '=')
326 						p++;
327 				}
328 
329 				if (*p != '\0')
330 					*p++ = '\0';
331 
332 				if (tTd(19, 1))
333 					printf("MAIL: got arg %s=%s\n", kp,
334 						vp == NULL ? "<null>" : vp);
335 
336 				if (strcasecmp(kp, "size") == 0)
337 				{
338 					if (kp == NULL)
339 					{
340 						usrerr("501 SIZE requires a value");
341 						/* NOTREACHED */
342 					}
343 					msize = atol(vp);
344 				}
345 				else
346 				{
347 					usrerr("501 %s parameter unrecognized", kp);
348 					/* NOTREACHED */
349 				}
350 			}
351 
352 			if (!enoughspace(msize))
353 			{
354 				message("452 Insufficient disk space; try again later");
355 				break;
356 			}
357 			message("250 Sender ok");
358 			gotmail = TRUE;
359 			break;
360 
361 		  case CMDRCPT:		/* rcpt -- designate recipient */
362 			if (!gotmail)
363 			{
364 				usrerr("503 Need MAIL before RCPT");
365 				break;
366 			}
367 			SmtpPhase = "RCPT";
368 			setproctitle("%s %s: %s", e->e_id, CurHostName, inp);
369 			if (setjmp(TopFrame) > 0)
370 			{
371 				e->e_flags &= ~EF_FATALERRS;
372 				break;
373 			}
374 			QuickAbort = TRUE;
375 			LogUsrErrs = TRUE;
376 
377 			e->e_flags |= EF_VRFYONLY;
378 
379 			p = skipword(p, "to");
380 			if (p == NULL)
381 				break;
382 			a = parseaddr(p, (ADDRESS *) NULL, 1, ' ', NULL, e);
383 			if (a == NULL)
384 				break;
385 			a->q_flags |= QPRIMARY;
386 			a = recipient(a, &e->e_sendqueue, e);
387 			if (Errors != 0)
388 				break;
389 
390 			/* no errors during parsing, but might be a duplicate */
391 			e->e_to = p;
392 			if (!bitset(QBADADDR, a->q_flags))
393 				message("250 Recipient ok");
394 			else
395 			{
396 				/* punt -- should keep message in ADDRESS.... */
397 				message("550 Addressee unknown");
398 			}
399 			e->e_to = NULL;
400 			break;
401 
402 		  case CMDDATA:		/* data -- text of mail */
403 			SmtpPhase = "DATA";
404 			if (!gotmail)
405 			{
406 				message("503 Need MAIL command");
407 				break;
408 			}
409 			else if (e->e_nrcpts <= 0)
410 			{
411 				message("503 Need RCPT (recipient)");
412 				break;
413 			}
414 
415 			/* check to see if we need to re-expand aliases */
416 			for (a = e->e_sendqueue; a != NULL; a = a->q_next)
417 			{
418 				if (bitset(QVERIFIED, a->q_flags))
419 					break;
420 			}
421 
422 			/* collect the text of the message */
423 			SmtpPhase = "collect";
424 			setproctitle("%s %s: %s", e->e_id, CurHostName, inp);
425 			collect(TRUE, a != NULL, e);
426 			if (Errors != 0)
427 				break;
428 
429 			/*
430 			**  Arrange to send to everyone.
431 			**	If sending to multiple people, mail back
432 			**		errors rather than reporting directly.
433 			**	In any case, don't mail back errors for
434 			**		anything that has happened up to
435 			**		now (the other end will do this).
436 			**	Truncate our transcript -- the mail has gotten
437 			**		to us successfully, and if we have
438 			**		to mail this back, it will be easier
439 			**		on the reader.
440 			**	Then send to everyone.
441 			**	Finally give a reply code.  If an error has
442 			**		already been given, don't mail a
443 			**		message back.
444 			**	We goose error returns by clearing error bit.
445 			*/
446 
447 			SmtpPhase = "delivery";
448 			if (e->e_nrcpts != 1)
449 			{
450 				HoldErrs = TRUE;
451 				e->e_errormode = EM_MAIL;
452 			}
453 			e->e_flags &= ~EF_FATALERRS;
454 			e->e_xfp = freopen(queuename(e, 'x'), "w", e->e_xfp);
455 			id = e->e_id;
456 
457 			/* send to all recipients */
458 			sendall(e, a == NULL ? SM_DEFAULT : SM_QUEUE);
459 			e->e_to = NULL;
460 
461 			/* save statistics */
462 			markstats(e, (ADDRESS *) NULL);
463 
464 			/* issue success if appropriate and reset */
465 			if (Errors == 0 || HoldErrs)
466 				message("250 %s Message accepted for delivery", id);
467 			else
468 				e->e_flags &= ~EF_FATALERRS;
469 
470 			/* if we just queued, poke it */
471 			if (a != NULL && e->e_sendmode != SM_QUEUE)
472 			{
473 				unlockqueue(e);
474 				dowork(id, TRUE, TRUE, e);
475 				e->e_id = NULL;
476 			}
477 
478 			/* if in a child, pop back to our parent */
479 			if (InChild)
480 				finis();
481 
482 			/* clean up a bit */
483 			gotmail = FALSE;
484 			dropenvelope(e);
485 			CurEnv = e = newenvelope(e, CurEnv);
486 			e->e_flags = BlankEnvelope.e_flags;
487 			break;
488 
489 		  case CMDRSET:		/* rset -- reset state */
490 			message("250 Reset state");
491 			if (InChild)
492 				finis();
493 
494 			/* clean up a bit */
495 			gotmail = FALSE;
496 			dropenvelope(e);
497 			CurEnv = e = newenvelope(e, CurEnv);
498 			break;
499 
500 		  case CMDVRFY:		/* vrfy -- verify address */
501 		  case CMDEXPN:		/* expn -- expand address */
502 			vrfy = c->cmdcode == CMDVRFY;
503 			if (bitset(vrfy ? PRIV_NOVRFY : PRIV_NOEXPN,
504 						PrivacyFlags))
505 			{
506 				if (vrfy)
507 					message("252 Who's to say?");
508 				else
509 					message("502 That's none of your business");
510 				break;
511 			}
512 			else if (!gothello &&
513 				 bitset(vrfy ? PRIV_NEEDVRFYHELO : PRIV_NEEDEXPNHELO,
514 						PrivacyFlags))
515 			{
516 				message("503 I demand that you introduce yourself first");
517 				break;
518 			}
519 			if (runinchild(vrfy ? "SMTP-VRFY" : "SMTP-EXPN", e) > 0)
520 				break;
521 			setproctitle("%s: %s", CurHostName, inp);
522 #ifdef LOG
523 			if (LogLevel > 5)
524 				syslog(LOG_INFO, "%s: %s", CurHostName, inp);
525 #endif
526 			vrfyqueue = NULL;
527 			QuickAbort = TRUE;
528 			if (vrfy)
529 				e->e_flags |= EF_VRFYONLY;
530 			(void) sendtolist(p, (ADDRESS *) NULL, &vrfyqueue, e);
531 			if (Errors != 0)
532 			{
533 				if (InChild)
534 					finis();
535 				break;
536 			}
537 			while (vrfyqueue != NULL)
538 			{
539 				register ADDRESS *a = vrfyqueue->q_next;
540 				char *code;
541 
542 				while (a != NULL && bitset(QDONTSEND|QBADADDR, a->q_flags))
543 					a = a->q_next;
544 
545 				if (!bitset(QDONTSEND|QBADADDR, vrfyqueue->q_flags))
546 					printvrfyaddr(vrfyqueue, a == NULL);
547 				else if (a == NULL)
548 					message("554 Self destructive alias loop");
549 				vrfyqueue = a;
550 			}
551 			if (InChild)
552 				finis();
553 			break;
554 
555 		  case CMDHELP:		/* help -- give user info */
556 			help(p);
557 			break;
558 
559 		  case CMDNOOP:		/* noop -- do nothing */
560 			message("200 OK");
561 			break;
562 
563 		  case CMDQUIT:		/* quit -- leave mail */
564 			message("221 %s closing connection", MyHostName);
565 			if (InChild)
566 				ExitStat = EX_QUIT;
567 			finis();
568 
569 		  case CMDVERB:		/* set verbose mode */
570 			Verbose = TRUE;
571 			e->e_sendmode = SM_DELIVER;
572 			message("200 Verbose mode");
573 			break;
574 
575 		  case CMDONEX:		/* doing one transaction only */
576 			OneXact = TRUE;
577 			message("200 Only one transaction");
578 			break;
579 
580 # ifdef SMTPDEBUG
581 		  case CMDDBGQSHOW:	/* show queues */
582 			printf("Send Queue=");
583 			printaddr(e->e_sendqueue, TRUE);
584 			break;
585 
586 		  case CMDDBGDEBUG:	/* set debug mode */
587 			tTsetup(tTdvect, sizeof tTdvect, "0-99.1");
588 			tTflag(p);
589 			message("200 Debug set");
590 			break;
591 
592 # else /* not SMTPDEBUG */
593 
594 		  case CMDDBGQSHOW:	/* show queues */
595 		  case CMDDBGDEBUG:	/* set debug mode */
596 # ifdef LOG
597 			if (LogLevel > 0)
598 				syslog(LOG_NOTICE,
599 				    "\"%s\" command from %s (%s)",
600 				    c->cmdname, RealHostName,
601 				    anynet_ntoa(&RealHostAddr));
602 # endif
603 			/* FALL THROUGH */
604 # endif /* SMTPDEBUG */
605 
606 		  case CMDERROR:	/* unknown command */
607 			message("500 Command unrecognized");
608 			break;
609 
610 		  default:
611 			errno = 0;
612 			syserr("500 smtp: unknown code %d", c->cmdcode);
613 			break;
614 		}
615 	}
616 }
617 /*
618 **  SKIPWORD -- skip a fixed word.
619 **
620 **	Parameters:
621 **		p -- place to start looking.
622 **		w -- word to skip.
623 **
624 **	Returns:
625 **		p following w.
626 **		NULL on error.
627 **
628 **	Side Effects:
629 **		clobbers the p data area.
630 */
631 
632 static char *
633 skipword(p, w)
634 	register char *p;
635 	char *w;
636 {
637 	register char *q;
638 
639 	/* find beginning of word */
640 	while (isascii(*p) && isspace(*p))
641 		p++;
642 	q = p;
643 
644 	/* find end of word */
645 	while (*p != '\0' && *p != ':' && !(isascii(*p) && isspace(*p)))
646 		p++;
647 	while (isascii(*p) && isspace(*p))
648 		*p++ = '\0';
649 	if (*p != ':')
650 	{
651 	  syntax:
652 		message("501 Syntax error");
653 		Errors++;
654 		return (NULL);
655 	}
656 	*p++ = '\0';
657 	while (isascii(*p) && isspace(*p))
658 		p++;
659 
660 	/* see if the input word matches desired word */
661 	if (strcasecmp(q, w))
662 		goto syntax;
663 
664 	return (p);
665 }
666 /*
667 **  PRINTVRFYADDR -- print an entry in the verify queue
668 **
669 **	Parameters:
670 **		a -- the address to print
671 **		last -- set if this is the last one.
672 **
673 **	Returns:
674 **		none.
675 **
676 **	Side Effects:
677 **		Prints the appropriate 250 codes.
678 */
679 
680 printvrfyaddr(a, last)
681 	register ADDRESS *a;
682 	bool last;
683 {
684 	char fmtbuf[20];
685 
686 	strcpy(fmtbuf, "250");
687 	fmtbuf[3] = last ? ' ' : '-';
688 
689 	if (strchr(a->q_paddr, '<') != NULL)
690 		strcpy(&fmtbuf[4], "%s");
691 	else if (a->q_fullname == NULL)
692 		strcpy(&fmtbuf[4], "<%s>");
693 	else
694 	{
695 		strcpy(&fmtbuf[4], "%s <%s>");
696 		message(fmtbuf, a->q_fullname, a->q_paddr);
697 		return;
698 	}
699 	message(fmtbuf, a->q_paddr);
700 }
701 /*
702 **  HELP -- implement the HELP command.
703 **
704 **	Parameters:
705 **		topic -- the topic we want help for.
706 **
707 **	Returns:
708 **		none.
709 **
710 **	Side Effects:
711 **		outputs the help file to message output.
712 */
713 
714 help(topic)
715 	char *topic;
716 {
717 	register FILE *hf;
718 	int len;
719 	char buf[MAXLINE];
720 	bool noinfo;
721 
722 	if (HelpFile == NULL || (hf = fopen(HelpFile, "r")) == NULL)
723 	{
724 		/* no help */
725 		errno = 0;
726 		message("502 HELP not implemented");
727 		return;
728 	}
729 
730 	if (topic == NULL || *topic == '\0')
731 		topic = "smtp";
732 	else
733 		makelower(topic);
734 
735 	len = strlen(topic);
736 	noinfo = TRUE;
737 
738 	while (fgets(buf, sizeof buf, hf) != NULL)
739 	{
740 		if (strncmp(buf, topic, len) == 0)
741 		{
742 			register char *p;
743 
744 			p = strchr(buf, '\t');
745 			if (p == NULL)
746 				p = buf;
747 			else
748 				p++;
749 			fixcrlf(p, TRUE);
750 			message("214-%s", p);
751 			noinfo = FALSE;
752 		}
753 	}
754 
755 	if (noinfo)
756 		message("504 HELP topic unknown");
757 	else
758 		message("214 End of HELP info");
759 	(void) fclose(hf);
760 }
761 /*
762 **  RUNINCHILD -- return twice -- once in the child, then in the parent again
763 **
764 **	Parameters:
765 **		label -- a string used in error messages
766 **
767 **	Returns:
768 **		zero in the child
769 **		one in the parent
770 **
771 **	Side Effects:
772 **		none.
773 */
774 
775 runinchild(label, e)
776 	char *label;
777 	register ENVELOPE *e;
778 {
779 	int childpid;
780 
781 	if (!OneXact)
782 	{
783 		childpid = dofork();
784 		if (childpid < 0)
785 		{
786 			syserr("%s: cannot fork", label);
787 			return (1);
788 		}
789 		if (childpid > 0)
790 		{
791 			auto int st;
792 
793 			/* parent -- wait for child to complete */
794 			st = waitfor(childpid);
795 			if (st == -1)
796 				syserr("%s: lost child", label);
797 
798 			/* if we exited on a QUIT command, complete the process */
799 			if (st == (EX_QUIT << 8))
800 				finis();
801 
802 			return (1);
803 		}
804 		else
805 		{
806 			/* child */
807 			InChild = TRUE;
808 			QuickAbort = FALSE;
809 			clearenvelope(e, FALSE);
810 		}
811 	}
812 
813 	/* open alias database */
814 	initaliases(AliasFile, FALSE, e);
815 
816 	return (0);
817 }
818 
819 # endif /* SMTP */
820