xref: /illumos-gate/usr/src/cmd/sendmail/src/collect.c (revision e9af4bc0b1cc30cea75d6ad4aa2fde97d985e9be)
1 /*
2  * Copyright (c) 1998-2006, 2008 Sendmail, Inc. and its suppliers.
3  *	All rights reserved.
4  * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
5  * Copyright (c) 1988, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * By using this file, you agree to the terms and conditions set
9  * forth in the LICENSE file which can be found at the top level of
10  * the sendmail distribution.
11  *
12  */
13 
14 #include <sendmail.h>
15 
16 SM_RCSID("@(#)$Id: collect.c,v 8.284 2008/08/06 05:26:24 ca Exp $")
17 
18 static void	eatfrom __P((char *volatile, ENVELOPE *));
19 static void	collect_doheader __P((ENVELOPE *));
20 static SM_FILE_T *collect_dfopen __P((ENVELOPE *));
21 static SM_FILE_T *collect_eoh __P((ENVELOPE *, int, int));
22 
23 /*
24 **  COLLECT_EOH -- end-of-header processing in collect()
25 **
26 **	Called by collect() when it encounters the blank line
27 **	separating the header from the message body, or when it
28 **	encounters EOF in a message that contains only a header.
29 **
30 **	Parameters:
31 **		e -- envelope
32 **		numhdrs -- number of headers
33 **		hdrslen -- length of headers
34 **
35 **	Results:
36 **		NULL, or handle to open data file
37 **
38 **	Side Effects:
39 **		end-of-header check ruleset is invoked.
40 **		envelope state is updated.
41 **		headers may be added and deleted.
42 **		selects the queue.
43 **		opens the data file.
44 */
45 
46 static SM_FILE_T *
collect_eoh(e,numhdrs,hdrslen)47 collect_eoh(e, numhdrs, hdrslen)
48 	ENVELOPE *e;
49 	int numhdrs;
50 	int hdrslen;
51 {
52 	char hnum[16];
53 	char hsize[16];
54 
55 	/* call the end-of-header check ruleset */
56 	(void) sm_snprintf(hnum, sizeof(hnum), "%d", numhdrs);
57 	(void) sm_snprintf(hsize, sizeof(hsize), "%d", hdrslen);
58 	if (tTd(30, 10))
59 		sm_dprintf("collect: rscheck(\"check_eoh\", \"%s $| %s\")\n",
60 			   hnum, hsize);
61 	(void) rscheck("check_eoh", hnum, hsize, e, RSF_UNSTRUCTURED|RSF_COUNT,
62 			3, NULL, e->e_id, NULL);
63 
64 	/*
65 	**  Process the header,
66 	**  select the queue, open the data file.
67 	*/
68 
69 	collect_doheader(e);
70 	return collect_dfopen(e);
71 }
72 
73 /*
74 **  COLLECT_DOHEADER -- process header in collect()
75 **
76 **	Called by collect() after it has finished parsing the header,
77 **	but before it selects the queue and creates the data file.
78 **	The results of processing the header will affect queue selection.
79 **
80 **	Parameters:
81 **		e -- envelope
82 **
83 **	Results:
84 **		none.
85 **
86 **	Side Effects:
87 **		envelope state is updated.
88 **		headers may be added and deleted.
89 */
90 
91 static void
collect_doheader(e)92 collect_doheader(e)
93 	ENVELOPE *e;
94 {
95 	/*
96 	**  Find out some information from the headers.
97 	**	Examples are who is the from person & the date.
98 	*/
99 
100 	eatheader(e, true, false);
101 
102 	if (GrabTo && e->e_sendqueue == NULL)
103 		usrerr("No recipient addresses found in header");
104 
105 	/*
106 	**  If we have a Return-Receipt-To:, turn it into a DSN.
107 	*/
108 
109 	if (RrtImpliesDsn && hvalue("return-receipt-to", e->e_header) != NULL)
110 	{
111 		ADDRESS *q;
112 
113 		for (q = e->e_sendqueue; q != NULL; q = q->q_next)
114 			if (!bitset(QHASNOTIFY, q->q_flags))
115 				q->q_flags |= QHASNOTIFY|QPINGONSUCCESS;
116 	}
117 
118 	/*
119 	**  Add an appropriate recipient line if we have none.
120 	*/
121 
122 	if (hvalue("to", e->e_header) != NULL ||
123 	    hvalue("cc", e->e_header) != NULL ||
124 	    hvalue("apparently-to", e->e_header) != NULL)
125 	{
126 		/* have a valid recipient header -- delete Bcc: headers */
127 		e->e_flags |= EF_DELETE_BCC;
128 	}
129 	else if (hvalue("bcc", e->e_header) == NULL)
130 	{
131 		/* no valid recipient headers */
132 		register ADDRESS *q;
133 		char *hdr = NULL;
134 
135 		/* create a recipient field */
136 		switch (NoRecipientAction)
137 		{
138 		  case NRA_ADD_APPARENTLY_TO:
139 			hdr = "Apparently-To";
140 			break;
141 
142 		  case NRA_ADD_TO:
143 			hdr = "To";
144 			break;
145 
146 		  case NRA_ADD_BCC:
147 			addheader("Bcc", " ", 0, e, true);
148 			break;
149 
150 		  case NRA_ADD_TO_UNDISCLOSED:
151 			addheader("To", "undisclosed-recipients:;", 0, e, true);
152 			break;
153 		}
154 
155 		if (hdr != NULL)
156 		{
157 			for (q = e->e_sendqueue; q != NULL; q = q->q_next)
158 			{
159 				if (q->q_alias != NULL)
160 					continue;
161 				if (tTd(30, 3))
162 					sm_dprintf("Adding %s: %s\n",
163 						hdr, q->q_paddr);
164 				addheader(hdr, q->q_paddr, 0, e, true);
165 			}
166 		}
167 	}
168 }
169 
170 /*
171 **  COLLECT_DFOPEN -- open the message data file
172 **
173 **	Called by collect() after it has finished processing the header.
174 **	Queue selection occurs at this point, possibly based on the
175 **	envelope's recipient list and on header information.
176 **
177 **	Parameters:
178 **		e -- envelope
179 **
180 **	Results:
181 **		NULL, or a pointer to an open data file,
182 **		into which the message body will be written by collect().
183 **
184 **	Side Effects:
185 **		Calls syserr, sets EF_FATALERRS and returns NULL
186 **		if there is insufficient disk space.
187 **		Aborts process if data file could not be opened.
188 **		Otherwise, the queue is selected,
189 **		e->e_{dfino,dfdev,msgsize,flags} are updated,
190 **		and a pointer to an open data file is returned.
191 */
192 
193 static SM_FILE_T *
collect_dfopen(e)194 collect_dfopen(e)
195 	ENVELOPE *e;
196 {
197 	MODE_T oldumask = 0;
198 	int dfd;
199 	struct stat stbuf;
200 	SM_FILE_T *df;
201 	char *dfname;
202 
203 	if (!setnewqueue(e))
204 		return NULL;
205 
206 	dfname = queuename(e, DATAFL_LETTER);
207 	if (bitset(S_IWGRP, QueueFileMode))
208 		oldumask = umask(002);
209 	df = bfopen(dfname, QueueFileMode, DataFileBufferSize,
210 		    SFF_OPENASROOT);
211 	if (bitset(S_IWGRP, QueueFileMode))
212 		(void) umask(oldumask);
213 	if (df == NULL)
214 	{
215 		syserr("@Cannot create %s", dfname);
216 		e->e_flags |= EF_NO_BODY_RETN;
217 		flush_errors(true);
218 		finis(false, true, ExitStat);
219 		/* NOTREACHED */
220 	}
221 	dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL);
222 	if (dfd < 0 || fstat(dfd, &stbuf) < 0)
223 		e->e_dfino = -1;
224 	else
225 	{
226 		e->e_dfdev = stbuf.st_dev;
227 		e->e_dfino = stbuf.st_ino;
228 	}
229 	e->e_flags |= EF_HAS_DF;
230 	return df;
231 }
232 
233 /*
234 **  COLLECT -- read & parse message header & make temp file.
235 **
236 **	Creates a temporary file name and copies the standard
237 **	input to that file.  Leading UNIX-style "From" lines are
238 **	stripped off (after important information is extracted).
239 **
240 **	Parameters:
241 **		fp -- file to read.
242 **		smtpmode -- if set, we are running SMTP: give an RFC821
243 **			style message to say we are ready to collect
244 **			input, and never ignore a single dot to mean
245 **			end of message.
246 **		hdrp -- the location to stash the header.
247 **		e -- the current envelope.
248 **		rsetsize -- reset e_msgsize?
249 **
250 **	Returns:
251 **		none.
252 **
253 **	Side Effects:
254 **		If successful,
255 **		- Data file is created and filled, and e->e_dfp is set.
256 **		- The from person may be set.
257 **		If the "enough disk space" check fails,
258 **		- syserr is called.
259 **		- e->e_dfp is NULL.
260 **		- e->e_flags & EF_FATALERRS is set.
261 **		- collect() returns.
262 **		If data file cannot be created, the process is terminated.
263 */
264 
265 /* values for input state machine */
266 #define IS_NORM		0	/* middle of line */
267 #define IS_BOL		1	/* beginning of line */
268 #define IS_DOT		2	/* read a dot at beginning of line */
269 #define IS_DOTCR	3	/* read ".\r" at beginning of line */
270 #define IS_CR		4	/* read a carriage return */
271 
272 /* values for message state machine */
273 #define MS_UFROM	0	/* reading Unix from line */
274 #define MS_HEADER	1	/* reading message header */
275 #define MS_BODY		2	/* reading message body */
276 #define MS_DISCARD	3	/* discarding rest of message */
277 
278 void
collect(fp,smtpmode,hdrp,e,rsetsize)279 collect(fp, smtpmode, hdrp, e, rsetsize)
280 	SM_FILE_T *fp;
281 	bool smtpmode;
282 	HDR **hdrp;
283 	register ENVELOPE *e;
284 	bool rsetsize;
285 {
286 	register SM_FILE_T *df;
287 	bool ignrdot;
288 	int dbto;
289 	register char *bp;
290 	int c;
291 	bool inputerr;
292 	bool headeronly;
293 	char *buf;
294 	int buflen;
295 	int istate;
296 	int mstate;
297 	int hdrslen;
298 	int numhdrs;
299 	int afd;
300 	unsigned char *pbp;
301 	unsigned char peekbuf[8];
302 	char bufbuf[MAXLINE];
303 
304 	df = NULL;
305 	ignrdot = smtpmode ? false : IgnrDot;
306 
307 	/* timeout for I/O functions is in milliseconds */
308 	dbto = smtpmode ? ((int) TimeOuts.to_datablock * 1000)
309 			: SM_TIME_FOREVER;
310 	sm_io_setinfo(fp, SM_IO_WHAT_TIMEOUT, &dbto);
311 	set_tls_rd_tmo(TimeOuts.to_datablock);
312 	c = SM_IO_EOF;
313 	inputerr = false;
314 	headeronly = hdrp != NULL;
315 	hdrslen = 0;
316 	numhdrs = 0;
317 	HasEightBits = false;
318 	buf = bp = bufbuf;
319 	buflen = sizeof(bufbuf);
320 	pbp = peekbuf;
321 	istate = IS_BOL;
322 	mstate = SaveFrom ? MS_HEADER : MS_UFROM;
323 
324 	/*
325 	**  Tell ARPANET to go ahead.
326 	*/
327 
328 	if (smtpmode)
329 		message("354 Enter mail, end with \".\" on a line by itself");
330 
331 	/* simulate an I/O timeout when used as sink */
332 	if (tTd(83, 101))
333 		sleep(319);
334 
335 	if (tTd(30, 2))
336 		sm_dprintf("collect\n");
337 
338 	/*
339 	**  Read the message.
340 	**
341 	**	This is done using two interleaved state machines.
342 	**	The input state machine is looking for things like
343 	**	hidden dots; the message state machine is handling
344 	**	the larger picture (e.g., header versus body).
345 	*/
346 
347 	if (rsetsize)
348 		e->e_msgsize = 0;
349 	for (;;)
350 	{
351 		if (tTd(30, 35))
352 			sm_dprintf("top, istate=%d, mstate=%d\n", istate,
353 				   mstate);
354 		for (;;)
355 		{
356 			if (pbp > peekbuf)
357 				c = *--pbp;
358 			else
359 			{
360 				while (!sm_io_eof(fp) && !sm_io_error(fp))
361 				{
362 					errno = 0;
363 					c = sm_io_getc(fp, SM_TIME_DEFAULT);
364 					if (c == SM_IO_EOF && errno == EINTR)
365 					{
366 						/* Interrupted, retry */
367 						sm_io_clearerr(fp);
368 						continue;
369 					}
370 
371 					/* timeout? */
372 					if (c == SM_IO_EOF && errno == EAGAIN
373 					    && smtpmode)
374 					{
375 						/*
376 						**  Override e_message in
377 						**  usrerr() as this is the
378 						**  reason for failure that
379 						**  should be logged for
380 						**  undelivered recipients.
381 						*/
382 
383 						e->e_message = NULL;
384 						errno = 0;
385 						inputerr = true;
386 						goto readabort;
387 					}
388 					break;
389 				}
390 				if (TrafficLogFile != NULL && !headeronly)
391 				{
392 					if (istate == IS_BOL)
393 						(void) sm_io_fprintf(TrafficLogFile,
394 							SM_TIME_DEFAULT,
395 							"%05d <<< ",
396 							(int) CurrentPid);
397 					if (c == SM_IO_EOF)
398 						(void) sm_io_fprintf(TrafficLogFile,
399 							SM_TIME_DEFAULT,
400 							"[EOF]\n");
401 					else
402 						(void) sm_io_putc(TrafficLogFile,
403 							SM_TIME_DEFAULT,
404 							c);
405 				}
406 				if (c == SM_IO_EOF)
407 					goto readerr;
408 				if (SevenBitInput)
409 					c &= 0x7f;
410 				else
411 					HasEightBits |= bitset(0x80, c);
412 			}
413 			if (tTd(30, 94))
414 				sm_dprintf("istate=%d, c=%c (0x%x)\n",
415 					istate, (char) c, c);
416 			switch (istate)
417 			{
418 			  case IS_BOL:
419 				if (c == '.')
420 				{
421 					istate = IS_DOT;
422 					continue;
423 				}
424 				break;
425 
426 			  case IS_DOT:
427 				if (c == '\n' && !ignrdot &&
428 				    !bitset(EF_NL_NOT_EOL, e->e_flags))
429 					goto readerr;
430 				else if (c == '\r' &&
431 					 !bitset(EF_CRLF_NOT_EOL, e->e_flags))
432 				{
433 					istate = IS_DOTCR;
434 					continue;
435 				}
436 				else if (ignrdot ||
437 					 (c != '.' &&
438 					  OpMode != MD_SMTP &&
439 					  OpMode != MD_DAEMON &&
440 					  OpMode != MD_ARPAFTP))
441 
442 				{
443 					SM_ASSERT(pbp < peekbuf +
444 							sizeof(peekbuf));
445 					*pbp++ = c;
446 					c = '.';
447 				}
448 				break;
449 
450 			  case IS_DOTCR:
451 				if (c == '\n' && !ignrdot)
452 					goto readerr;
453 				else
454 				{
455 					/* push back the ".\rx" */
456 					SM_ASSERT(pbp < peekbuf +
457 							sizeof(peekbuf));
458 					*pbp++ = c;
459 					if (OpMode != MD_SMTP &&
460 					    OpMode != MD_DAEMON &&
461 					    OpMode != MD_ARPAFTP)
462 					{
463 						SM_ASSERT(pbp < peekbuf +
464 							 sizeof(peekbuf));
465 						*pbp++ = '\r';
466 						c = '.';
467 					}
468 					else
469 						c = '\r';
470 				}
471 				break;
472 
473 			  case IS_CR:
474 				if (c == '\n')
475 					istate = IS_BOL;
476 				else
477 				{
478 					(void) sm_io_ungetc(fp, SM_TIME_DEFAULT,
479 							    c);
480 					c = '\r';
481 					istate = IS_NORM;
482 				}
483 				goto bufferchar;
484 			}
485 
486 			if (c == '\r' && !bitset(EF_CRLF_NOT_EOL, e->e_flags))
487 			{
488 				istate = IS_CR;
489 				continue;
490 			}
491 			else if (c == '\n' && !bitset(EF_NL_NOT_EOL,
492 						      e->e_flags))
493 				istate = IS_BOL;
494 			else
495 				istate = IS_NORM;
496 
497 bufferchar:
498 			if (!headeronly)
499 			{
500 				/* no overflow? */
501 				if (e->e_msgsize >= 0)
502 				{
503 					e->e_msgsize++;
504 					if (MaxMessageSize > 0 &&
505 					    !bitset(EF_TOOBIG, e->e_flags) &&
506 					    e->e_msgsize > MaxMessageSize)
507 						 e->e_flags |= EF_TOOBIG;
508 				}
509 			}
510 			switch (mstate)
511 			{
512 			  case MS_BODY:
513 				/* just put the character out */
514 				if (!bitset(EF_TOOBIG, e->e_flags))
515 					(void) sm_io_putc(df, SM_TIME_DEFAULT,
516 							  c);
517 
518 				/* FALLTHROUGH */
519 
520 			  case MS_DISCARD:
521 				continue;
522 			}
523 
524 			SM_ASSERT(mstate == MS_UFROM || mstate == MS_HEADER);
525 
526 			/* header -- buffer up */
527 			if (bp >= &buf[buflen - 2])
528 			{
529 				char *obuf;
530 
531 				/* out of space for header */
532 				obuf = buf;
533 				if (buflen < MEMCHUNKSIZE)
534 					buflen *= 2;
535 				else
536 					buflen += MEMCHUNKSIZE;
537 				if (buflen <= 0)
538 				{
539 					sm_syslog(LOG_NOTICE, e->e_id,
540 						  "header overflow from %s during message collect",
541 						  CURHOSTNAME);
542 					errno = 0;
543 					e->e_flags |= EF_CLRQUEUE;
544 					e->e_status = "5.6.0";
545 					usrerrenh(e->e_status,
546 						  "552 Headers too large");
547 					goto discard;
548 				}
549 				buf = xalloc(buflen);
550 				memmove(buf, obuf, bp - obuf);
551 				bp = &buf[bp - obuf];
552 				if (obuf != bufbuf)
553 					sm_free(obuf);  /* XXX */
554 			}
555 
556 			if (c != '\0')
557 			{
558 				*bp++ = c;
559 				++hdrslen;
560 				if (!headeronly &&
561 				    MaxHeadersLength > 0 &&
562 				    hdrslen > MaxHeadersLength)
563 				{
564 					sm_syslog(LOG_NOTICE, e->e_id,
565 						  "headers too large (%d max) from %s during message collect",
566 						  MaxHeadersLength,
567 						  CURHOSTNAME);
568 					errno = 0;
569 					e->e_flags |= EF_CLRQUEUE;
570 					e->e_status = "5.6.0";
571 					usrerrenh(e->e_status,
572 						  "552 Headers too large (%d max)",
573 						  MaxHeadersLength);
574   discard:
575 					mstate = MS_DISCARD;
576 				}
577 			}
578 			if (istate == IS_BOL)
579 				break;
580 		}
581 		*bp = '\0';
582 
583 nextstate:
584 		if (tTd(30, 35))
585 			sm_dprintf("nextstate, istate=%d, mstate=%d, line=\"%s\"\n",
586 				istate, mstate, buf);
587 		switch (mstate)
588 		{
589 		  case MS_UFROM:
590 			mstate = MS_HEADER;
591 #ifndef NOTUNIX
592 			if (strncmp(buf, "From ", 5) == 0)
593 			{
594 				bp = buf;
595 				eatfrom(buf, e);
596 				continue;
597 			}
598 #endif /* ! NOTUNIX */
599 			/* FALLTHROUGH */
600 
601 		  case MS_HEADER:
602 			if (!isheader(buf))
603 			{
604 				mstate = MS_BODY;
605 				goto nextstate;
606 			}
607 
608 			/* check for possible continuation line */
609 			do
610 			{
611 				sm_io_clearerr(fp);
612 				errno = 0;
613 				c = sm_io_getc(fp, SM_TIME_DEFAULT);
614 
615 				/* timeout? */
616 				if (c == SM_IO_EOF && errno == EAGAIN
617 				    && smtpmode)
618 				{
619 					/*
620 					**  Override e_message in
621 					**  usrerr() as this is the
622 					**  reason for failure that
623 					**  should be logged for
624 					**  undelivered recipients.
625 					*/
626 
627 					e->e_message = NULL;
628 					errno = 0;
629 					inputerr = true;
630 					goto readabort;
631 				}
632 			} while (c == SM_IO_EOF && errno == EINTR);
633 			if (c != SM_IO_EOF)
634 				(void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c);
635 			if (c == ' ' || c == '\t')
636 			{
637 				/* yep -- defer this */
638 				continue;
639 			}
640 
641 			SM_ASSERT(bp > buf);
642 
643 			/* guaranteed by isheader(buf) */
644 			SM_ASSERT(*(bp - 1) != '\n' || bp > buf + 1);
645 
646 			/* trim off trailing CRLF or NL */
647 			if (*--bp != '\n' || *--bp != '\r')
648 				bp++;
649 			*bp = '\0';
650 
651 			if (bitset(H_EOH, chompheader(buf,
652 						      CHHDR_CHECK | CHHDR_USER,
653 						      hdrp, e)))
654 			{
655 				mstate = MS_BODY;
656 				goto nextstate;
657 			}
658 			numhdrs++;
659 			break;
660 
661 		  case MS_BODY:
662 			if (tTd(30, 1))
663 				sm_dprintf("EOH\n");
664 
665 			if (headeronly)
666 				goto readerr;
667 
668 			df = collect_eoh(e, numhdrs, hdrslen);
669 			if (df == NULL)
670 				e->e_flags |= EF_TOOBIG;
671 
672 			bp = buf;
673 
674 			/* toss blank line */
675 			if ((!bitset(EF_CRLF_NOT_EOL, e->e_flags) &&
676 				bp[0] == '\r' && bp[1] == '\n') ||
677 			    (!bitset(EF_NL_NOT_EOL, e->e_flags) &&
678 				bp[0] == '\n'))
679 			{
680 				break;
681 			}
682 
683 			/* if not a blank separator, write it out */
684 			if (!bitset(EF_TOOBIG, e->e_flags))
685 			{
686 				while (*bp != '\0')
687 					(void) sm_io_putc(df, SM_TIME_DEFAULT,
688 							  *bp++);
689 			}
690 			break;
691 		}
692 		bp = buf;
693 	}
694 
695 readerr:
696 	if ((sm_io_eof(fp) && smtpmode) || sm_io_error(fp))
697 	{
698 		const char *errmsg;
699 
700 		if (sm_io_eof(fp))
701 			errmsg = "unexpected close";
702 		else
703 			errmsg = sm_errstring(errno);
704 		if (tTd(30, 1))
705 			sm_dprintf("collect: premature EOM: %s\n", errmsg);
706 		if (LogLevel > 1)
707 			sm_syslog(LOG_WARNING, e->e_id,
708 				"collect: premature EOM: %s", errmsg);
709 		inputerr = true;
710 	}
711 
712 	if (headeronly)
713 		return;
714 
715 	if (mstate != MS_BODY)
716 	{
717 		/* no body or discard, so we never opened the data file */
718 		SM_ASSERT(df == NULL);
719 		df = collect_eoh(e, numhdrs, hdrslen);
720 	}
721 
722 	if (df == NULL)
723 	{
724 		/* skip next few clauses */
725 		/* EMPTY */
726 	}
727 	else if (sm_io_flush(df, SM_TIME_DEFAULT) != 0 || sm_io_error(df))
728 	{
729 		dferror(df, "sm_io_flush||sm_io_error", e);
730 		flush_errors(true);
731 		finis(true, true, ExitStat);
732 		/* NOTREACHED */
733 	}
734 	else if (SuperSafe == SAFE_NO ||
735 		 SuperSafe == SAFE_INTERACTIVE ||
736 		 (SuperSafe == SAFE_REALLY_POSTMILTER && smtpmode))
737 	{
738 		/* skip next few clauses */
739 		/* EMPTY */
740 		/* Note: updfs() is not called in this case! */
741 	}
742 	else if (sm_io_setinfo(df, SM_BF_COMMIT, NULL) < 0 && errno != EINVAL)
743 	{
744 		int save_errno = errno;
745 
746 		if (save_errno == EEXIST)
747 		{
748 			char *dfile;
749 			struct stat st;
750 			int dfd;
751 
752 			dfile = queuename(e, DATAFL_LETTER);
753 			if (stat(dfile, &st) < 0)
754 				st.st_size = -1;
755 			errno = EEXIST;
756 			syserr("@collect: bfcommit(%s): already on disk, size=%ld",
757 			       dfile, (long) st.st_size);
758 			dfd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL);
759 			if (dfd >= 0)
760 				dumpfd(dfd, true, true);
761 		}
762 		errno = save_errno;
763 		dferror(df, "bfcommit", e);
764 		flush_errors(true);
765 		finis(save_errno != EEXIST, true, ExitStat);
766 	}
767 	else if ((afd = sm_io_getinfo(df, SM_IO_WHAT_FD, NULL)) < 0)
768 	{
769 		dferror(df, "sm_io_getinfo", e);
770 		flush_errors(true);
771 		finis(true, true, ExitStat);
772 		/* NOTREACHED */
773 	}
774 	else if (fsync(afd) < 0)
775 	{
776 		dferror(df, "fsync", e);
777 		flush_errors(true);
778 		finis(true, true, ExitStat);
779 		/* NOTREACHED */
780 	}
781 	else if (sm_io_close(df, SM_TIME_DEFAULT) < 0)
782 	{
783 		dferror(df, "sm_io_close", e);
784 		flush_errors(true);
785 		finis(true, true, ExitStat);
786 		/* NOTREACHED */
787 	}
788 	else
789 	{
790 		/* everything is happily flushed to disk */
791 		df = NULL;
792 
793 		/* remove from available space in filesystem */
794 		updfs(e, 0, 1, "collect");
795 	}
796 
797 	/* An EOF when running SMTP is an error */
798   readabort:
799 	if (inputerr && (OpMode == MD_SMTP || OpMode == MD_DAEMON))
800 	{
801 		char *host;
802 		char *problem;
803 		ADDRESS *q;
804 
805 		host = RealHostName;
806 		if (host == NULL)
807 			host = "localhost";
808 
809 		if (sm_io_eof(fp))
810 			problem = "unexpected close";
811 		else if (sm_io_error(fp))
812 			problem = "I/O error";
813 		else
814 			problem = "read timeout";
815 		if (LogLevel > 0 && sm_io_eof(fp))
816 			sm_syslog(LOG_NOTICE, e->e_id,
817 				"collect: %s on connection from %.100s, sender=%s",
818 				problem, host,
819 				shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
820 		if (sm_io_eof(fp))
821 			usrerr("421 4.4.1 collect: %s on connection from %s, from=%s",
822 				problem, host,
823 				shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
824 		else
825 			syserr("421 4.4.1 collect: %s on connection from %s, from=%s",
826 				problem, host,
827 				shortenstring(e->e_from.q_paddr, MAXSHORTSTR));
828 		flush_errors(true);
829 
830 		/* don't return an error indication */
831 		e->e_to = NULL;
832 		e->e_flags &= ~EF_FATALERRS;
833 		e->e_flags |= EF_CLRQUEUE;
834 
835 		/* Don't send any message notification to sender */
836 		for (q = e->e_sendqueue; q != NULL; q = q->q_next)
837 		{
838 			if (QS_IS_DEAD(q->q_state))
839 				continue;
840 			q->q_state = QS_FATALERR;
841 		}
842 
843 		(void) sm_io_close(df, SM_TIME_DEFAULT);
844 		df = NULL;
845 		finis(true, true, ExitStat);
846 		/* NOTREACHED */
847 	}
848 
849 	/* Log collection information. */
850 	if (tTd(92, 2))
851 		sm_dprintf("collect: e_id=%s, EF_LOGSENDER=%d, LogLevel=%d\n",
852 			e->e_id, bitset(EF_LOGSENDER, e->e_flags), LogLevel);
853 	if (bitset(EF_LOGSENDER, e->e_flags) && LogLevel > 4)
854 	{
855 		logsender(e, e->e_msgid);
856 		e->e_flags &= ~EF_LOGSENDER;
857 	}
858 
859 	/* check for message too large */
860 	if (bitset(EF_TOOBIG, e->e_flags))
861 	{
862 		e->e_flags |= EF_NO_BODY_RETN|EF_CLRQUEUE;
863 		if (!bitset(EF_FATALERRS, e->e_flags))
864 		{
865 			e->e_status = "5.2.3";
866 			usrerrenh(e->e_status,
867 				"552 Message exceeds maximum fixed size (%ld)",
868 				MaxMessageSize);
869 			if (LogLevel > 6)
870 				sm_syslog(LOG_NOTICE, e->e_id,
871 					"message size (%ld) exceeds maximum (%ld)",
872 					e->e_msgsize, MaxMessageSize);
873 		}
874 	}
875 
876 	/* check for illegal 8-bit data */
877 	if (HasEightBits)
878 	{
879 		e->e_flags |= EF_HAS8BIT;
880 		if (!bitset(MM_PASS8BIT|MM_MIME8BIT, MimeMode) &&
881 		    !bitset(EF_IS_MIME, e->e_flags))
882 		{
883 			e->e_status = "5.6.1";
884 			usrerrenh(e->e_status, "554 Eight bit data not allowed");
885 		}
886 	}
887 	else
888 	{
889 		/* if it claimed to be 8 bits, well, it lied.... */
890 		if (e->e_bodytype != NULL &&
891 		    sm_strcasecmp(e->e_bodytype, "8BITMIME") == 0)
892 			e->e_bodytype = "7BIT";
893 	}
894 
895 	if (SuperSafe == SAFE_REALLY && !bitset(EF_FATALERRS, e->e_flags))
896 	{
897 		char *dfname = queuename(e, DATAFL_LETTER);
898 		if ((e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, dfname,
899 					   SM_IO_RDONLY_B, NULL)) == NULL)
900 		{
901 			/* we haven't acked receipt yet, so just chuck this */
902 			syserr("@Cannot reopen %s", dfname);
903 			finis(true, true, ExitStat);
904 			/* NOTREACHED */
905 		}
906 	}
907 	else
908 		e->e_dfp = df;
909 
910 	/* collect statistics */
911 	if (OpMode != MD_VERIFY)
912 	{
913 		/*
914 		**  Recalculate e_msgpriority, it is done at in eatheader()
915 		**  which is called (in 8.12) after the header is collected,
916 		**  hence e_msgsize is (most likely) incorrect.
917 		*/
918 
919 		e->e_msgpriority = e->e_msgsize
920 				 - e->e_class * WkClassFact
921 				 + e->e_nrcpts * WkRecipFact;
922 		markstats(e, (ADDRESS *) NULL, STATS_NORMAL);
923 	}
924 }
925 
926 /*
927 **  DFERROR -- signal error on writing the data file.
928 **
929 **	Called by collect().  Collect() always terminates the process
930 **	immediately after calling dferror(), which means that the SMTP
931 **	session will be terminated, which means that any error message
932 **	issued by dferror must be a 421 error, as per RFC 821.
933 **
934 **	Parameters:
935 **		df -- the file pointer for the data file.
936 **		msg -- detailed message.
937 **		e -- the current envelope.
938 **
939 **	Returns:
940 **		none.
941 **
942 **	Side Effects:
943 **		Gives an error message.
944 **		Arranges for following output to go elsewhere.
945 */
946 
947 void
dferror(df,msg,e)948 dferror(df, msg, e)
949 	SM_FILE_T *volatile df;
950 	char *msg;
951 	register ENVELOPE *e;
952 {
953 	char *dfname;
954 
955 	dfname = queuename(e, DATAFL_LETTER);
956 	setstat(EX_IOERR);
957 	if (errno == ENOSPC)
958 	{
959 #if STAT64 > 0
960 		struct stat64 st;
961 #else /* STAT64 > 0 */
962 		struct stat st;
963 #endif /* STAT64 > 0 */
964 		long avail;
965 		long bsize;
966 
967 		e->e_flags |= EF_NO_BODY_RETN;
968 
969 		if (
970 #if STAT64 > 0
971 		    fstat64(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st)
972 #else /* STAT64 > 0 */
973 		    fstat(sm_io_getinfo(df, SM_IO_WHAT_FD, NULL), &st)
974 #endif /* STAT64 > 0 */
975 		    < 0)
976 		  st.st_size = 0;
977 		(void) sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, dfname,
978 				    SM_IO_WRONLY_B, NULL, df);
979 		if (st.st_size <= 0)
980 			(void) sm_io_fprintf(df, SM_TIME_DEFAULT,
981 				"\n*** Mail could not be accepted");
982 		else
983 			(void) sm_io_fprintf(df, SM_TIME_DEFAULT,
984 				"\n*** Mail of at least %llu bytes could not be accepted\n",
985 				(ULONGLONG_T) st.st_size);
986 		(void) sm_io_fprintf(df, SM_TIME_DEFAULT,
987 			"*** at %s due to lack of disk space for temp file.\n",
988 			MyHostName);
989 		avail = freediskspace(qid_printqueue(e->e_qgrp, e->e_qdir),
990 				      &bsize);
991 		if (avail > 0)
992 		{
993 			if (bsize > 1024)
994 				avail *= bsize / 1024;
995 			else if (bsize < 1024)
996 				avail /= 1024 / bsize;
997 			(void) sm_io_fprintf(df, SM_TIME_DEFAULT,
998 				"*** Currently, %ld kilobytes are available for mail temp files.\n",
999 				avail);
1000 		}
1001 #if 0
1002 		/* Wrong response code; should be 421. */
1003 		e->e_status = "4.3.1";
1004 		usrerrenh(e->e_status, "452 Out of disk space for temp file");
1005 #else /* 0 */
1006 		syserr("421 4.3.1 Out of disk space for temp file");
1007 #endif /* 0 */
1008 	}
1009 	else
1010 		syserr("421 4.3.0 collect: Cannot write %s (%s, uid=%d, gid=%d)",
1011 			dfname, msg, (int) geteuid(), (int) getegid());
1012 	if (sm_io_reopen(SmFtStdio, SM_TIME_DEFAULT, SM_PATH_DEVNULL,
1013 			 SM_IO_WRONLY, NULL, df) == NULL)
1014 		sm_syslog(LOG_ERR, e->e_id,
1015 			  "dferror: sm_io_reopen(\"/dev/null\") failed: %s",
1016 			  sm_errstring(errno));
1017 }
1018 /*
1019 **  EATFROM -- chew up a UNIX style from line and process
1020 **
1021 **	This does indeed make some assumptions about the format
1022 **	of UNIX messages.
1023 **
1024 **	Parameters:
1025 **		fm -- the from line.
1026 **		e -- envelope
1027 **
1028 **	Returns:
1029 **		none.
1030 **
1031 **	Side Effects:
1032 **		extracts what information it can from the header,
1033 **		such as the date.
1034 */
1035 
1036 #ifndef NOTUNIX
1037 
1038 static char	*DowList[] =
1039 {
1040 	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", NULL
1041 };
1042 
1043 static char	*MonthList[] =
1044 {
1045 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
1046 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
1047 	NULL
1048 };
1049 
1050 static void
eatfrom(fm,e)1051 eatfrom(fm, e)
1052 	char *volatile fm;
1053 	register ENVELOPE *e;
1054 {
1055 	register char *p;
1056 	register char **dt;
1057 
1058 	if (tTd(30, 2))
1059 		sm_dprintf("eatfrom(%s)\n", fm);
1060 
1061 	/* find the date part */
1062 	p = fm;
1063 	while (*p != '\0')
1064 	{
1065 		/* skip a word */
1066 		while (*p != '\0' && *p != ' ')
1067 			p++;
1068 		while (*p == ' ')
1069 			p++;
1070 		if (strlen(p) < 17)
1071 		{
1072 			/* no room for the date */
1073 			return;
1074 		}
1075 		if (!(isascii(*p) && isupper(*p)) ||
1076 		    p[3] != ' ' || p[13] != ':' || p[16] != ':')
1077 			continue;
1078 
1079 		/* we have a possible date */
1080 		for (dt = DowList; *dt != NULL; dt++)
1081 			if (strncmp(*dt, p, 3) == 0)
1082 				break;
1083 		if (*dt == NULL)
1084 			continue;
1085 
1086 		for (dt = MonthList; *dt != NULL; dt++)
1087 		{
1088 			if (strncmp(*dt, &p[4], 3) == 0)
1089 				break;
1090 		}
1091 		if (*dt != NULL)
1092 			break;
1093 	}
1094 
1095 	if (*p != '\0')
1096 	{
1097 		char *q, buf[25];
1098 
1099 		/* we have found a date */
1100 		(void) sm_strlcpy(buf, p, sizeof(buf));
1101 		q = arpadate(buf);
1102 		macdefine(&e->e_macro, A_TEMP, 'a', q);
1103 	}
1104 }
1105 #endif /* ! NOTUNIX */
1106