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	6.29 (Berkeley) 03/23/93 (with SMTP)";
14 #else
15 static char sccsid[] = "@(#)srvrsmtp.c	6.29 (Berkeley) 03/23/93 (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 	char *sendinghost;
103 	bool gotmail;			/* mail command received */
104 	bool gothello;			/* helo command received */
105 	bool vrfy;			/* set if this is a vrfy command */
106 	char *protocol;			/* sending protocol */
107 	long msize;			/* approximate maximum message size */
108 	auto char *delimptr;
109 	char *id;
110 	char inp[MAXLINE];
111 	char cmdbuf[MAXLINE];
112 	char hostbuf[MAXNAME];
113 	extern char Version[];
114 	extern char *macvalue();
115 	extern ADDRESS *recipient();
116 	extern ENVELOPE BlankEnvelope;
117 	extern ENVELOPE *newenvelope();
118 	extern char *anynet_ntoa();
119 
120 	if (OutChannel != stdout)
121 	{
122 		/* arrange for debugging output to go to remote host */
123 		(void) close(1);
124 		(void) dup(fileno(OutChannel));
125 	}
126 	settime(e);
127 	CurHostName = RealHostName;
128 	setproctitle("srvrsmtp %s", CurHostName);
129 	expand("\201e", inp, &inp[sizeof inp], e);
130 	message("220 %s", inp);
131 	SmtpPhase = "startup";
132 	sendinghost = NULL;
133 	protocol = NULL;
134 	gothello = FALSE;
135 	gotmail = FALSE;
136 	for (;;)
137 	{
138 		/* arrange for backout */
139 		if (setjmp(TopFrame) > 0 && InChild)
140 			finis();
141 		QuickAbort = FALSE;
142 		HoldErrs = FALSE;
143 		LogUsrErrs = FALSE;
144 		e->e_flags &= ~EF_VRFYONLY;
145 
146 		/* setup for the read */
147 		e->e_to = NULL;
148 		Errors = 0;
149 		(void) fflush(stdout);
150 
151 		/* read the input line */
152 		p = sfgets(inp, sizeof inp, InChannel, TimeOuts.to_nextcommand);
153 
154 		/* handle errors */
155 		if (p == NULL)
156 		{
157 			/* end of file, just die */
158 			message("421 %s Lost input channel from %s",
159 				MyHostName, CurHostName);
160 #ifdef LOG
161 			if (LogLevel > 1)
162 				syslog(LOG_NOTICE, "lost input channel from %s",
163 					CurHostName);
164 #endif
165 			if (InChild)
166 				ExitStat = EX_QUIT;
167 			finis();
168 		}
169 
170 		/* clean up end of line */
171 		fixcrlf(inp, TRUE);
172 
173 		/* echo command to transcript */
174 		if (e->e_xfp != NULL)
175 			fprintf(e->e_xfp, "<<< %s\n", inp);
176 
177 		/* break off command */
178 		for (p = inp; isascii(*p) && isspace(*p); p++)
179 			continue;
180 		cmd = cmdbuf;
181 		while (*p != '\0' &&
182 		       !(isascii(*p) && isspace(*p)) &&
183 		       cmd < &cmdbuf[sizeof cmdbuf - 2])
184 			*cmd++ = *p++;
185 		*cmd = '\0';
186 
187 		/* throw away leading whitespace */
188 		while (isascii(*p) && isspace(*p))
189 			p++;
190 
191 		/* decode command */
192 		for (c = CmdTab; c->cmdname != NULL; c++)
193 		{
194 			if (!strcasecmp(c->cmdname, cmdbuf))
195 				break;
196 		}
197 
198 		/* reset errors */
199 		errno = 0;
200 
201 		/* process command */
202 		switch (c->cmdcode)
203 		{
204 		  case CMDHELO:		/* hello -- introduce yourself */
205 		  case CMDEHLO:		/* extended hello */
206 			if (c->cmdcode == CMDEHLO)
207 			{
208 				protocol = "ESMTP";
209 				SmtpPhase = "EHLO";
210 			}
211 			else
212 			{
213 				protocol = "SMTP";
214 				SmtpPhase = "HELO";
215 			}
216 			setproctitle("%s: %s", CurHostName, inp);
217 			if (strcasecmp(p, MyHostName) == 0)
218 			{
219 				/*
220 				**  Didn't know about alias or MX,
221 				**  or connected to an echo server
222 				*/
223 
224 				message("553 %s config error: mail loops back to myself",
225 					MyHostName);
226 				break;
227 			}
228 			(void) strcpy(hostbuf, p);
229 			(void) strcat(hostbuf, " (");
230 			(void) strcat(hostbuf, anynet_ntoa(&RealHostAddr));
231 			if (strcasecmp(p, RealHostName) != 0)
232 			{
233 				auth_warning(e, "Host %s claimed to be %s",
234 					RealHostName, p);
235 				(void) strcat(hostbuf, "; ");
236 				(void) strcat(hostbuf, RealHostName);
237 			}
238 			(void) strcat(hostbuf, ")");
239 			sendinghost = newstr(hostbuf);
240 
241 			/* send ext. message -- old systems must ignore */
242 			message("250-%s Hello %s, pleased to meet you",
243 				MyHostName, sendinghost);
244 			if (!bitset(PRIV_NOEXPN, PrivacyFlags))
245 				message("250-EXPN");
246 			message("250-SIZE");
247 			message("250 HELP");
248 			gothello = TRUE;
249 			break;
250 
251 		  case CMDMAIL:		/* mail -- designate sender */
252 			SmtpPhase = "MAIL";
253 
254 			/* force a sending host even if no HELO given */
255 			if (sendinghost == NULL && macvalue('s', e) == NULL)
256 				sendinghost = RealHostName;
257 
258 			/* check for validity of this command */
259 			if (!gothello)
260 			{
261 				if (bitset(PRIV_NEEDMAILHELO, PrivacyFlags))
262 					message("503 Polite people say HELO first");
263 				else
264 					auth_warning(e,
265 						"Host %s didn't use HELO protocol",
266 						RealHostName);
267 				break;
268 			}
269 			if (gotmail)
270 			{
271 				message("503 Sender already specified");
272 				break;
273 			}
274 			if (InChild)
275 			{
276 				errno = 0;
277 				syserr("503 Nested MAIL command: MAIL %s", p);
278 				finis();
279 			}
280 
281 			/* fork a subprocess to process this command */
282 			if (runinchild("SMTP-MAIL", e) > 0)
283 				break;
284 			if (sendinghost != NULL)
285 				define('s', sendinghost, e);
286 			if (protocol == NULL)
287 				protocol = "SMTP";
288 			define('r', protocol, e);
289 			initsys(e);
290 			setproctitle("%s %s: %s", e->e_id, CurHostName, inp);
291 
292 			/* child -- go do the processing */
293 			p = skipword(p, "from");
294 			if (p == NULL)
295 				break;
296 			if (setjmp(TopFrame) > 0)
297 			{
298 				/* this failed -- undo work */
299 				if (InChild)
300 					finis();
301 				break;
302 			}
303 			QuickAbort = TRUE;
304 
305 			/* must parse sender first */
306 			delimptr = NULL;
307 			setsender(p, e, &delimptr, FALSE);
308 			p = delimptr;
309 			if (p != NULL && *p != '\0')
310 				*p++ = '\0';
311 
312 			/* now parse ESMTP arguments */
313 			msize = 0;
314 			for (; p != NULL && *p != '\0'; p++)
315 			{
316 				char *kp;
317 				char *vp;
318 
319 				/* locate the beginning of the keyword */
320 				while (isascii(*p) && isspace(*p))
321 					p++;
322 				if (*p == '\0')
323 					break;
324 				kp = p;
325 
326 				/* skip to the value portion */
327 				while (isascii(*p) && isalnum(*p) || *p == '-')
328 					p++;
329 				if (*p == '=')
330 				{
331 					*p++ = '\0';
332 					vp = p;
333 
334 					/* skip to the end of the value */
335 					while (*p != '\0' && *p != ' ' &&
336 					       !(isascii(*p) && iscntrl(*p)) &&
337 					       *p != '=')
338 						p++;
339 				}
340 
341 				if (*p != '\0')
342 					*p++ = '\0';
343 
344 				if (tTd(19, 1))
345 					printf("MAIL: got arg %s=%s\n", kp,
346 						vp == NULL ? "<null>" : vp);
347 
348 				if (strcasecmp(kp, "size") == 0)
349 				{
350 					if (kp == NULL)
351 					{
352 						usrerr("501 SIZE requires a value");
353 						/* NOTREACHED */
354 					}
355 					msize = atol(vp);
356 				}
357 				else
358 				{
359 					usrerr("501 %s parameter unrecognized", kp);
360 					/* NOTREACHED */
361 				}
362 			}
363 
364 			if (!enoughspace(msize))
365 			{
366 				message("452 Insufficient disk space; try again later");
367 				break;
368 			}
369 			message("250 Sender ok");
370 			gotmail = TRUE;
371 			break;
372 
373 		  case CMDRCPT:		/* rcpt -- designate recipient */
374 			SmtpPhase = "RCPT";
375 			setproctitle("%s %s: %s", e->e_id, CurHostName, inp);
376 			if (setjmp(TopFrame) > 0)
377 			{
378 				e->e_flags &= ~EF_FATALERRS;
379 				break;
380 			}
381 			QuickAbort = TRUE;
382 			LogUsrErrs = TRUE;
383 
384 			/* optimization -- if queueing, don't expand aliases */
385 			if (e->e_sendmode == SM_QUEUE)
386 				e->e_flags |= EF_VRFYONLY;
387 
388 			p = skipword(p, "to");
389 			if (p == NULL)
390 				break;
391 			a = parseaddr(p, (ADDRESS *) NULL, 1, ' ', NULL, e);
392 			if (a == NULL)
393 				break;
394 			a->q_flags |= QPRIMARY;
395 			a = recipient(a, &e->e_sendqueue, e);
396 			if (Errors != 0)
397 				break;
398 
399 			/* no errors during parsing, but might be a duplicate */
400 			e->e_to = p;
401 			if (!bitset(QBADADDR, a->q_flags))
402 				message("250 Recipient ok");
403 			else
404 			{
405 				/* punt -- should keep message in ADDRESS.... */
406 				message("550 Addressee unknown");
407 			}
408 			e->e_to = NULL;
409 			break;
410 
411 		  case CMDDATA:		/* data -- text of mail */
412 			SmtpPhase = "DATA";
413 			if (!gotmail)
414 			{
415 				message("503 Need MAIL command");
416 				break;
417 			}
418 			else if (e->e_nrcpts <= 0)
419 			{
420 				message("503 Need RCPT (recipient)");
421 				break;
422 			}
423 
424 			/* collect the text of the message */
425 			SmtpPhase = "collect";
426 			setproctitle("%s %s: %s", e->e_id, CurHostName, inp);
427 			collect(TRUE, e);
428 			if (Errors != 0)
429 				break;
430 
431 			/*
432 			**  Arrange to send to everyone.
433 			**	If sending to multiple people, mail back
434 			**		errors rather than reporting directly.
435 			**	In any case, don't mail back errors for
436 			**		anything that has happened up to
437 			**		now (the other end will do this).
438 			**	Truncate our transcript -- the mail has gotten
439 			**		to us successfully, and if we have
440 			**		to mail this back, it will be easier
441 			**		on the reader.
442 			**	Then send to everyone.
443 			**	Finally give a reply code.  If an error has
444 			**		already been given, don't mail a
445 			**		message back.
446 			**	We goose error returns by clearing error bit.
447 			*/
448 
449 			SmtpPhase = "delivery";
450 			if (e->e_nrcpts != 1)
451 			{
452 				HoldErrs = TRUE;
453 				e->e_errormode = EM_MAIL;
454 			}
455 			e->e_flags &= ~EF_FATALERRS;
456 			e->e_xfp = freopen(queuename(e, 'x'), "w", e->e_xfp);
457 			id = e->e_id;
458 
459 			/* send to all recipients */
460 			sendall(e, SM_DEFAULT);
461 			e->e_to = NULL;
462 
463 			/* save statistics */
464 			markstats(e, (ADDRESS *) NULL);
465 
466 			/* issue success if appropriate and reset */
467 			if (Errors == 0 || HoldErrs)
468 				message("250 %s OK", id);
469 			else
470 				e->e_flags &= ~EF_FATALERRS;
471 
472 			/* if in a child, pop back to our parent */
473 			if (InChild)
474 				finis();
475 
476 			/* clean up a bit */
477 			gotmail = FALSE;
478 			dropenvelope(e);
479 			CurEnv = e = newenvelope(e, CurEnv);
480 			e->e_flags = BlankEnvelope.e_flags;
481 			break;
482 
483 		  case CMDRSET:		/* rset -- reset state */
484 			message("250 Reset state");
485 			if (InChild)
486 				finis();
487 
488 			/* clean up a bit */
489 			gotmail = FALSE;
490 			dropenvelope(e);
491 			CurEnv = e = newenvelope(e, CurEnv);
492 			break;
493 
494 		  case CMDVRFY:		/* vrfy -- verify address */
495 		  case CMDEXPN:		/* expn -- expand address */
496 			vrfy = c->cmdcode == CMDVRFY;
497 			if (bitset(vrfy ? PRIV_NOVRFY : PRIV_NOEXPN,
498 						PrivacyFlags))
499 			{
500 				if (vrfy)
501 					message("252 Who's to say?");
502 				else
503 					message("502 That's none of your business");
504 				break;
505 			}
506 			else if (!gothello &&
507 				 bitset(vrfy ? PRIV_NEEDVRFYHELO : PRIV_NEEDEXPNHELO,
508 						PrivacyFlags))
509 			{
510 				message("503 I demand that you introduce yourself first");
511 				break;
512 			}
513 			if (runinchild(vrfy ? "SMTP-VRFY" : "SMTP-EXPN", e) > 0)
514 				break;
515 			setproctitle("%s: %s", CurHostName, inp);
516 #ifdef LOG
517 			if (LogLevel > 5)
518 				syslog(LOG_INFO, "%s: %s", CurHostName, inp);
519 #endif
520 			vrfyqueue = NULL;
521 			QuickAbort = TRUE;
522 			if (vrfy)
523 				e->e_flags |= EF_VRFYONLY;
524 			(void) sendtolist(p, (ADDRESS *) NULL, &vrfyqueue, e);
525 			if (Errors != 0)
526 			{
527 				if (InChild)
528 					finis();
529 				break;
530 			}
531 			while (vrfyqueue != NULL)
532 			{
533 				register ADDRESS *a = vrfyqueue->q_next;
534 				char *code;
535 
536 				while (a != NULL && bitset(QDONTSEND|QBADADDR, a->q_flags))
537 					a = a->q_next;
538 
539 				if (!bitset(QDONTSEND|QBADADDR, vrfyqueue->q_flags))
540 					printvrfyaddr(vrfyqueue, a == NULL);
541 				else if (a == NULL)
542 					message("554 Self destructive alias loop");
543 				vrfyqueue = a;
544 			}
545 			if (InChild)
546 				finis();
547 			break;
548 
549 		  case CMDHELP:		/* help -- give user info */
550 			help(p);
551 			break;
552 
553 		  case CMDNOOP:		/* noop -- do nothing */
554 			message("200 OK");
555 			break;
556 
557 		  case CMDQUIT:		/* quit -- leave mail */
558 			message("221 %s closing connection", MyHostName);
559 			if (InChild)
560 				ExitStat = EX_QUIT;
561 			finis();
562 
563 		  case CMDVERB:		/* set verbose mode */
564 			Verbose = TRUE;
565 			e->e_sendmode = SM_DELIVER;
566 			message("200 Verbose mode");
567 			break;
568 
569 		  case CMDONEX:		/* doing one transaction only */
570 			OneXact = TRUE;
571 			message("200 Only one transaction");
572 			break;
573 
574 # ifdef SMTPDEBUG
575 		  case CMDDBGQSHOW:	/* show queues */
576 			printf("Send Queue=");
577 			printaddr(e->e_sendqueue, TRUE);
578 			break;
579 
580 		  case CMDDBGDEBUG:	/* set debug mode */
581 			tTsetup(tTdvect, sizeof tTdvect, "0-99.1");
582 			tTflag(p);
583 			message("200 Debug set");
584 			break;
585 
586 # else /* not SMTPDEBUG */
587 
588 		  case CMDDBGQSHOW:	/* show queues */
589 		  case CMDDBGDEBUG:	/* set debug mode */
590 # ifdef LOG
591 			if (LogLevel > 0)
592 				syslog(LOG_NOTICE,
593 				    "\"%s\" command from %s (%s)",
594 				    c->cmdname, RealHostName,
595 				    anynet_ntoa(&RealHostAddr));
596 # endif
597 			/* FALL THROUGH */
598 # endif /* SMTPDEBUG */
599 
600 		  case CMDERROR:	/* unknown command */
601 			message("500 Command unrecognized");
602 			break;
603 
604 		  default:
605 			errno = 0;
606 			syserr("500 smtp: unknown code %d", c->cmdcode);
607 			break;
608 		}
609 	}
610 }
611 /*
612 **  SKIPWORD -- skip a fixed word.
613 **
614 **	Parameters:
615 **		p -- place to start looking.
616 **		w -- word to skip.
617 **
618 **	Returns:
619 **		p following w.
620 **		NULL on error.
621 **
622 **	Side Effects:
623 **		clobbers the p data area.
624 */
625 
626 static char *
627 skipword(p, w)
628 	register char *p;
629 	char *w;
630 {
631 	register char *q;
632 
633 	/* find beginning of word */
634 	while (isascii(*p) && isspace(*p))
635 		p++;
636 	q = p;
637 
638 	/* find end of word */
639 	while (*p != '\0' && *p != ':' && !(isascii(*p) && isspace(*p)))
640 		p++;
641 	while (isascii(*p) && isspace(*p))
642 		*p++ = '\0';
643 	if (*p != ':')
644 	{
645 	  syntax:
646 		message("501 Syntax error");
647 		Errors++;
648 		return (NULL);
649 	}
650 	*p++ = '\0';
651 	while (isascii(*p) && isspace(*p))
652 		p++;
653 
654 	/* see if the input word matches desired word */
655 	if (strcasecmp(q, w))
656 		goto syntax;
657 
658 	return (p);
659 }
660 /*
661 **  PRINTVRFYADDR -- print an entry in the verify queue
662 **
663 **	Parameters:
664 **		a -- the address to print
665 **		last -- set if this is the last one.
666 **
667 **	Returns:
668 **		none.
669 **
670 **	Side Effects:
671 **		Prints the appropriate 250 codes.
672 */
673 
674 printvrfyaddr(a, last)
675 	register ADDRESS *a;
676 	bool last;
677 {
678 	char fmtbuf[20];
679 
680 	strcpy(fmtbuf, "250");
681 	fmtbuf[3] = last ? ' ' : '-';
682 
683 	if (strchr(a->q_paddr, '<') != NULL)
684 		strcpy(&fmtbuf[4], "%s");
685 	else if (a->q_fullname == NULL)
686 		strcpy(&fmtbuf[4], "<%s>");
687 	else
688 	{
689 		strcpy(&fmtbuf[4], "%s <%s>");
690 		message(fmtbuf, a->q_fullname, a->q_paddr);
691 		return;
692 	}
693 	message(fmtbuf, a->q_paddr);
694 }
695 /*
696 **  HELP -- implement the HELP command.
697 **
698 **	Parameters:
699 **		topic -- the topic we want help for.
700 **
701 **	Returns:
702 **		none.
703 **
704 **	Side Effects:
705 **		outputs the help file to message output.
706 */
707 
708 help(topic)
709 	char *topic;
710 {
711 	register FILE *hf;
712 	int len;
713 	char buf[MAXLINE];
714 	bool noinfo;
715 
716 	if (HelpFile == NULL || (hf = fopen(HelpFile, "r")) == NULL)
717 	{
718 		/* no help */
719 		errno = 0;
720 		message("502 HELP not implemented");
721 		return;
722 	}
723 
724 	if (topic == NULL || *topic == '\0')
725 		topic = "smtp";
726 	else
727 		makelower(topic);
728 
729 	len = strlen(topic);
730 	noinfo = TRUE;
731 
732 	while (fgets(buf, sizeof buf, hf) != NULL)
733 	{
734 		if (strncmp(buf, topic, len) == 0)
735 		{
736 			register char *p;
737 
738 			p = strchr(buf, '\t');
739 			if (p == NULL)
740 				p = buf;
741 			else
742 				p++;
743 			fixcrlf(p, TRUE);
744 			message("214-%s", p);
745 			noinfo = FALSE;
746 		}
747 	}
748 
749 	if (noinfo)
750 		message("504 HELP topic unknown");
751 	else
752 		message("214 End of HELP info");
753 	(void) fclose(hf);
754 }
755 /*
756 **  RUNINCHILD -- return twice -- once in the child, then in the parent again
757 **
758 **	Parameters:
759 **		label -- a string used in error messages
760 **
761 **	Returns:
762 **		zero in the child
763 **		one in the parent
764 **
765 **	Side Effects:
766 **		none.
767 */
768 
769 runinchild(label, e)
770 	char *label;
771 	register ENVELOPE *e;
772 {
773 	int childpid;
774 
775 	if (!OneXact)
776 	{
777 		childpid = dofork();
778 		if (childpid < 0)
779 		{
780 			syserr("%s: cannot fork", label);
781 			return (1);
782 		}
783 		if (childpid > 0)
784 		{
785 			auto int st;
786 
787 			/* parent -- wait for child to complete */
788 			st = waitfor(childpid);
789 			if (st == -1)
790 				syserr("%s: lost child", label);
791 
792 			/* if we exited on a QUIT command, complete the process */
793 			if (st == (EX_QUIT << 8))
794 				finis();
795 
796 			return (1);
797 		}
798 		else
799 		{
800 			/* child */
801 			InChild = TRUE;
802 			QuickAbort = FALSE;
803 			clearenvelope(e, FALSE);
804 		}
805 	}
806 
807 	/* open alias database */
808 	initaliases(AliasFile, FALSE, e);
809 
810 	return (0);
811 }
812 
813 # endif /* SMTP */
814