1 /*
2 * Copyright (c) 1998-2007, 2009 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: util.c,v 8.416 2009/12/18 17:05:26 ca Exp $")
17
18 #include <sm/sendmail.h>
19 #include <sysexits.h>
20 #include <sm/xtrap.h>
21
22 /*
23 ** NEWSTR -- Create a copy of a C string
24 **
25 ** Parameters:
26 ** s -- the string to copy.
27 **
28 ** Returns:
29 ** pointer to newly allocated string.
30 */
31
32 char *
33 newstr(s)
34 const char *s;
35 {
36 size_t l;
37 char *n;
38
39 l = strlen(s);
40 SM_ASSERT(l + 1 > l);
41 n = xalloc(l + 1);
42 sm_strlcpy(n, s, l + 1);
43 return n;
44 }
45
46 /*
47 ** ADDQUOTES -- Adds quotes & quote bits to a string.
48 **
49 ** Runs through a string and adds backslashes and quote bits.
50 **
51 ** Parameters:
52 ** s -- the string to modify.
53 ** rpool -- resource pool from which to allocate result
54 **
55 ** Returns:
56 ** pointer to quoted string.
57 */
58
59 char *
addquotes(s,rpool)60 addquotes(s, rpool)
61 char *s;
62 SM_RPOOL_T *rpool;
63 {
64 int len = 0;
65 char c;
66 char *p = s, *q, *r;
67
68 if (s == NULL)
69 return NULL;
70
71 /* Find length of quoted string */
72 while ((c = *p++) != '\0')
73 {
74 len++;
75 if (c == '\\' || c == '"')
76 len++;
77 }
78
79 q = r = sm_rpool_malloc_x(rpool, len + 3);
80 p = s;
81
82 /* add leading quote */
83 *q++ = '"';
84 while ((c = *p++) != '\0')
85 {
86 /* quote \ or " */
87 if (c == '\\' || c == '"')
88 *q++ = '\\';
89 *q++ = c;
90 }
91 *q++ = '"';
92 *q = '\0';
93 return r;
94 }
95
96 /*
97 ** STRIPBACKSLASH -- Strip all leading backslashes from a string, provided
98 ** the following character is alpha-numerical.
99 **
100 ** This is done in place.
101 **
102 ** Parameters:
103 ** s -- the string to strip.
104 **
105 ** Returns:
106 ** none.
107 */
108
109 void
stripbackslash(s)110 stripbackslash(s)
111 char *s;
112 {
113 char *p, *q, c;
114
115 if (s == NULL || *s == '\0')
116 return;
117 p = q = s;
118 while (*p == '\\' && (p[1] == '\\' || (isascii(p[1]) && isalnum(p[1]))))
119 p++;
120 do
121 {
122 c = *q++ = *p++;
123 } while (c != '\0');
124 }
125
126 /*
127 ** RFC822_STRING -- Checks string for proper RFC822 string quoting.
128 **
129 ** Runs through a string and verifies RFC822 special characters
130 ** are only found inside comments, quoted strings, or backslash
131 ** escaped. Also verified balanced quotes and parenthesis.
132 **
133 ** Parameters:
134 ** s -- the string to modify.
135 **
136 ** Returns:
137 ** true iff the string is RFC822 compliant, false otherwise.
138 */
139
140 bool
rfc822_string(s)141 rfc822_string(s)
142 char *s;
143 {
144 bool quoted = false;
145 int commentlev = 0;
146 char *c = s;
147
148 if (s == NULL)
149 return false;
150
151 while (*c != '\0')
152 {
153 /* escaped character */
154 if (*c == '\\')
155 {
156 c++;
157 if (*c == '\0')
158 return false;
159 }
160 else if (commentlev == 0 && *c == '"')
161 quoted = !quoted;
162 else if (!quoted)
163 {
164 if (*c == ')')
165 {
166 /* unbalanced ')' */
167 if (commentlev == 0)
168 return false;
169 else
170 commentlev--;
171 }
172 else if (*c == '(')
173 commentlev++;
174 else if (commentlev == 0 &&
175 strchr(MustQuoteChars, *c) != NULL)
176 return false;
177 }
178 c++;
179 }
180
181 /* unbalanced '"' or '(' */
182 return !quoted && commentlev == 0;
183 }
184
185 /*
186 ** SHORTEN_RFC822_STRING -- Truncate and rebalance an RFC822 string
187 **
188 ** Arbitrarily shorten (in place) an RFC822 string and rebalance
189 ** comments and quotes.
190 **
191 ** Parameters:
192 ** string -- the string to shorten
193 ** length -- the maximum size, 0 if no maximum
194 **
195 ** Returns:
196 ** true if string is changed, false otherwise
197 **
198 ** Side Effects:
199 ** Changes string in place, possibly resulting
200 ** in a shorter string.
201 */
202
203 bool
shorten_rfc822_string(string,length)204 shorten_rfc822_string(string, length)
205 char *string;
206 size_t length;
207 {
208 bool backslash = false;
209 bool modified = false;
210 bool quoted = false;
211 size_t slen;
212 int parencount = 0;
213 char *ptr = string;
214
215 /*
216 ** If have to rebalance an already short enough string,
217 ** need to do it within allocated space.
218 */
219
220 slen = strlen(string);
221 if (length == 0 || slen < length)
222 length = slen;
223
224 while (*ptr != '\0')
225 {
226 if (backslash)
227 {
228 backslash = false;
229 goto increment;
230 }
231
232 if (*ptr == '\\')
233 backslash = true;
234 else if (*ptr == '(')
235 {
236 if (!quoted)
237 parencount++;
238 }
239 else if (*ptr == ')')
240 {
241 if (--parencount < 0)
242 parencount = 0;
243 }
244
245 /* Inside a comment, quotes don't matter */
246 if (parencount <= 0 && *ptr == '"')
247 quoted = !quoted;
248
249 increment:
250 /* Check for sufficient space for next character */
251 if (length - (ptr - string) <= (size_t) ((backslash ? 1 : 0) +
252 parencount +
253 (quoted ? 1 : 0)))
254 {
255 /* Not enough, backtrack */
256 if (*ptr == '\\')
257 backslash = false;
258 else if (*ptr == '(' && !quoted)
259 parencount--;
260 else if (*ptr == '"' && parencount == 0)
261 quoted = false;
262 break;
263 }
264 ptr++;
265 }
266
267 /* Rebalance */
268 while (parencount-- > 0)
269 {
270 if (*ptr != ')')
271 {
272 modified = true;
273 *ptr = ')';
274 }
275 ptr++;
276 }
277 if (quoted)
278 {
279 if (*ptr != '"')
280 {
281 modified = true;
282 *ptr = '"';
283 }
284 ptr++;
285 }
286 if (*ptr != '\0')
287 {
288 modified = true;
289 *ptr = '\0';
290 }
291 return modified;
292 }
293
294 /*
295 ** FIND_CHARACTER -- find an unquoted character in an RFC822 string
296 **
297 ** Find an unquoted, non-commented character in an RFC822
298 ** string and return a pointer to its location in the
299 ** string.
300 **
301 ** Parameters:
302 ** string -- the string to search
303 ** character -- the character to find
304 **
305 ** Returns:
306 ** pointer to the character, or
307 ** a pointer to the end of the line if character is not found
308 */
309
310 char *
find_character(string,character)311 find_character(string, character)
312 char *string;
313 int character;
314 {
315 bool backslash = false;
316 bool quoted = false;
317 int parencount = 0;
318
319 while (string != NULL && *string != '\0')
320 {
321 if (backslash)
322 {
323 backslash = false;
324 if (!quoted && character == '\\' && *string == '\\')
325 break;
326 string++;
327 continue;
328 }
329 switch (*string)
330 {
331 case '\\':
332 backslash = true;
333 break;
334
335 case '(':
336 if (!quoted)
337 parencount++;
338 break;
339
340 case ')':
341 if (--parencount < 0)
342 parencount = 0;
343 break;
344 }
345
346 /* Inside a comment, nothing matters */
347 if (parencount > 0)
348 {
349 string++;
350 continue;
351 }
352
353 if (*string == '"')
354 quoted = !quoted;
355 else if (*string == character && !quoted)
356 break;
357 string++;
358 }
359
360 /* Return pointer to the character */
361 return string;
362 }
363
364 /*
365 ** CHECK_BODYTYPE -- check bodytype parameter
366 **
367 ** Parameters:
368 ** bodytype -- bodytype parameter
369 **
370 ** Returns:
371 ** BODYTYPE_* according to parameter
372 **
373 */
374
375 int
check_bodytype(bodytype)376 check_bodytype(bodytype)
377 char *bodytype;
378 {
379 /* check body type for legality */
380 if (bodytype == NULL)
381 return BODYTYPE_NONE;
382 if (sm_strcasecmp(bodytype, "7BIT") == 0)
383 return BODYTYPE_7BIT;
384 if (sm_strcasecmp(bodytype, "8BITMIME") == 0)
385 return BODYTYPE_8BITMIME;
386 return BODYTYPE_ILLEGAL;
387 }
388
389 /*
390 ** TRUNCATE_AT_DELIM -- truncate string at a delimiter and append "..."
391 **
392 ** Parameters:
393 ** str -- string to truncate
394 ** len -- maximum length (including '\0') (0 for unlimited)
395 ** delim -- delimiter character
396 **
397 ** Returns:
398 ** None.
399 */
400
401 void
truncate_at_delim(str,len,delim)402 truncate_at_delim(str, len, delim)
403 char *str;
404 size_t len;
405 int delim;
406 {
407 char *p;
408
409 if (str == NULL || len == 0 || strlen(str) < len)
410 return;
411
412 *(str + len - 1) = '\0';
413 while ((p = strrchr(str, delim)) != NULL)
414 {
415 *p = '\0';
416 if (p - str + 4 < len)
417 {
418 *p++ = (char) delim;
419 *p = '\0';
420 (void) sm_strlcat(str, "...", len);
421 return;
422 }
423 }
424
425 /* Couldn't find a place to append "..." */
426 if (len > 3)
427 (void) sm_strlcpy(str, "...", len);
428 else
429 str[0] = '\0';
430 }
431
432 /*
433 ** XALLOC -- Allocate memory, raise an exception on error
434 **
435 ** Parameters:
436 ** sz -- size of area to allocate.
437 **
438 ** Returns:
439 ** pointer to data region.
440 **
441 ** Exceptions:
442 ** SmHeapOutOfMemory (F:sm.heap) -- cannot allocate memory
443 **
444 ** Side Effects:
445 ** Memory is allocated.
446 */
447
448 char *
449 #if SM_HEAP_CHECK
xalloc_tagged(sz,file,line)450 xalloc_tagged(sz, file, line)
451 register int sz;
452 char *file;
453 int line;
454 #else /* SM_HEAP_CHECK */
455 xalloc(sz)
456 register int sz;
457 #endif /* SM_HEAP_CHECK */
458 {
459 register char *p;
460
461 SM_REQUIRE(sz >= 0);
462
463 /* some systems can't handle size zero mallocs */
464 if (sz <= 0)
465 sz = 1;
466
467 /* scaffolding for testing error handling code */
468 sm_xtrap_raise_x(&SmHeapOutOfMemory);
469
470 p = sm_malloc_tagged((unsigned) sz, file, line, sm_heap_group());
471 if (p == NULL)
472 {
473 sm_exc_raise_x(&SmHeapOutOfMemory);
474 }
475 return p;
476 }
477
478 /*
479 ** COPYPLIST -- copy list of pointers.
480 **
481 ** This routine is the equivalent of strdup for lists of
482 ** pointers.
483 **
484 ** Parameters:
485 ** list -- list of pointers to copy.
486 ** Must be NULL terminated.
487 ** copycont -- if true, copy the contents of the vector
488 ** (which must be a string) also.
489 ** rpool -- resource pool from which to allocate storage,
490 ** or NULL
491 **
492 ** Returns:
493 ** a copy of 'list'.
494 */
495
496 char **
copyplist(list,copycont,rpool)497 copyplist(list, copycont, rpool)
498 char **list;
499 bool copycont;
500 SM_RPOOL_T *rpool;
501 {
502 register char **vp;
503 register char **newvp;
504
505 for (vp = list; *vp != NULL; vp++)
506 continue;
507
508 vp++;
509
510 newvp = (char **) sm_rpool_malloc_x(rpool, (vp - list) * sizeof(*vp));
511 memmove((char *) newvp, (char *) list, (int) (vp - list) * sizeof(*vp));
512
513 if (copycont)
514 {
515 for (vp = newvp; *vp != NULL; vp++)
516 *vp = sm_rpool_strdup_x(rpool, *vp);
517 }
518
519 return newvp;
520 }
521
522 /*
523 ** COPYQUEUE -- copy address queue.
524 **
525 ** This routine is the equivalent of strdup for address queues;
526 ** addresses marked as QS_IS_DEAD() aren't copied
527 **
528 ** Parameters:
529 ** addr -- list of address structures to copy.
530 ** rpool -- resource pool from which to allocate storage
531 **
532 ** Returns:
533 ** a copy of 'addr'.
534 */
535
536 ADDRESS *
copyqueue(addr,rpool)537 copyqueue(addr, rpool)
538 ADDRESS *addr;
539 SM_RPOOL_T *rpool;
540 {
541 register ADDRESS *newaddr;
542 ADDRESS *ret;
543 register ADDRESS **tail = &ret;
544
545 while (addr != NULL)
546 {
547 if (!QS_IS_DEAD(addr->q_state))
548 {
549 newaddr = (ADDRESS *) sm_rpool_malloc_x(rpool,
550 sizeof(*newaddr));
551 STRUCTCOPY(*addr, *newaddr);
552 *tail = newaddr;
553 tail = &newaddr->q_next;
554 }
555 addr = addr->q_next;
556 }
557 *tail = NULL;
558
559 return ret;
560 }
561
562 /*
563 ** LOG_SENDMAIL_PID -- record sendmail pid and command line.
564 **
565 ** Parameters:
566 ** e -- the current envelope.
567 **
568 ** Returns:
569 ** none.
570 **
571 ** Side Effects:
572 ** writes pidfile, logs command line.
573 ** keeps file open and locked to prevent overwrite of active file
574 */
575
576 static SM_FILE_T *Pidf = NULL;
577
578 void
log_sendmail_pid(e)579 log_sendmail_pid(e)
580 ENVELOPE *e;
581 {
582 long sff;
583 char pidpath[MAXPATHLEN];
584 extern char *CommandLineArgs;
585
586 /* write the pid to the log file for posterity */
587 sff = SFF_NOLINK|SFF_ROOTOK|SFF_REGONLY|SFF_CREAT|SFF_NBLOCK;
588 if (TrustedUid != 0 && RealUid == TrustedUid)
589 sff |= SFF_OPENASROOT;
590 expand(PidFile, pidpath, sizeof(pidpath), e);
591 Pidf = safefopen(pidpath, O_WRONLY|O_TRUNC, FileMode, sff);
592 if (Pidf == NULL)
593 {
594 if (errno == EWOULDBLOCK)
595 sm_syslog(LOG_ERR, NOQID,
596 "unable to write pid to %s: file in use by another process",
597 pidpath);
598 else
599 sm_syslog(LOG_ERR, NOQID,
600 "unable to write pid to %s: %s",
601 pidpath, sm_errstring(errno));
602 }
603 else
604 {
605 PidFilePid = getpid();
606
607 /* write the process id on line 1 */
608 (void) sm_io_fprintf(Pidf, SM_TIME_DEFAULT, "%ld\n",
609 (long) PidFilePid);
610
611 /* line 2 contains all command line flags */
612 (void) sm_io_fprintf(Pidf, SM_TIME_DEFAULT, "%s\n",
613 CommandLineArgs);
614
615 /* flush */
616 (void) sm_io_flush(Pidf, SM_TIME_DEFAULT);
617
618 /*
619 ** Leave pid file open until process ends
620 ** so it's not overwritten by another
621 ** process.
622 */
623 }
624 if (LogLevel > 9)
625 sm_syslog(LOG_INFO, NOQID, "started as: %s", CommandLineArgs);
626 }
627
628 /*
629 ** CLOSE_SENDMAIL_PID -- close sendmail pid file
630 **
631 ** Parameters:
632 ** none.
633 **
634 ** Returns:
635 ** none.
636 */
637
638 void
close_sendmail_pid()639 close_sendmail_pid()
640 {
641 if (Pidf == NULL)
642 return;
643
644 (void) sm_io_close(Pidf, SM_TIME_DEFAULT);
645 Pidf = NULL;
646 }
647
648 /*
649 ** SET_DELIVERY_MODE -- set and record the delivery mode
650 **
651 ** Parameters:
652 ** mode -- delivery mode
653 ** e -- the current envelope.
654 **
655 ** Returns:
656 ** none.
657 **
658 ** Side Effects:
659 ** sets {deliveryMode} macro
660 */
661
662 void
set_delivery_mode(mode,e)663 set_delivery_mode(mode, e)
664 int mode;
665 ENVELOPE *e;
666 {
667 char buf[2];
668
669 e->e_sendmode = (char) mode;
670 buf[0] = (char) mode;
671 buf[1] = '\0';
672 macdefine(&e->e_macro, A_TEMP, macid("{deliveryMode}"), buf);
673 }
674
675 /*
676 ** SET_OP_MODE -- set and record the op mode
677 **
678 ** Parameters:
679 ** mode -- op mode
680 ** e -- the current envelope.
681 **
682 ** Returns:
683 ** none.
684 **
685 ** Side Effects:
686 ** sets {opMode} macro
687 */
688
689 void
set_op_mode(mode)690 set_op_mode(mode)
691 int mode;
692 {
693 char buf[2];
694 extern ENVELOPE BlankEnvelope;
695
696 OpMode = (char) mode;
697 buf[0] = (char) mode;
698 buf[1] = '\0';
699 macdefine(&BlankEnvelope.e_macro, A_TEMP, MID_OPMODE, buf);
700 }
701
702 /*
703 ** PRINTAV -- print argument vector.
704 **
705 ** Parameters:
706 ** fp -- output file pointer.
707 ** av -- argument vector.
708 **
709 ** Returns:
710 ** none.
711 **
712 ** Side Effects:
713 ** prints av.
714 */
715
716 void
printav(fp,av)717 printav(fp, av)
718 SM_FILE_T *fp;
719 char **av;
720 {
721 while (*av != NULL)
722 {
723 if (tTd(0, 44))
724 sm_dprintf("\n\t%08lx=", (unsigned long) *av);
725 else
726 (void) sm_io_putc(fp, SM_TIME_DEFAULT, ' ');
727 if (tTd(0, 99))
728 sm_dprintf("%s", str2prt(*av++));
729 else
730 xputs(fp, *av++);
731 }
732 (void) sm_io_putc(fp, SM_TIME_DEFAULT, '\n');
733 }
734
735 /*
736 ** XPUTS -- put string doing control escapes.
737 **
738 ** Parameters:
739 ** fp -- output file pointer.
740 ** s -- string to put.
741 **
742 ** Returns:
743 ** none.
744 **
745 ** Side Effects:
746 ** output to stdout
747 */
748
749 void
xputs(fp,s)750 xputs(fp, s)
751 SM_FILE_T *fp;
752 const char *s;
753 {
754 int c;
755 struct metamac *mp;
756 bool shiftout = false;
757 extern struct metamac MetaMacros[];
758 static SM_DEBUG_T DebugANSI = SM_DEBUG_INITIALIZER("ANSI",
759 "@(#)$Debug: ANSI - enable reverse video in debug output $");
760
761 /*
762 ** TermEscape is set here, rather than in main(),
763 ** because ANSI mode can be turned on or off at any time
764 ** if we are in -bt rule testing mode.
765 */
766
767 if (sm_debug_unknown(&DebugANSI))
768 {
769 if (sm_debug_active(&DebugANSI, 1))
770 {
771 TermEscape.te_rv_on = "\033[7m";
772 TermEscape.te_normal = "\033[0m";
773 }
774 else
775 {
776 TermEscape.te_rv_on = "";
777 TermEscape.te_normal = "";
778 }
779 }
780
781 if (s == NULL)
782 {
783 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%s<null>%s",
784 TermEscape.te_rv_on, TermEscape.te_normal);
785 return;
786 }
787 while ((c = (*s++ & 0377)) != '\0')
788 {
789 if (shiftout)
790 {
791 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%s",
792 TermEscape.te_normal);
793 shiftout = false;
794 }
795 if (!isascii(c) && !tTd(84, 1))
796 {
797 if (c == MATCHREPL)
798 {
799 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
800 "%s$",
801 TermEscape.te_rv_on);
802 shiftout = true;
803 if (*s == '\0')
804 continue;
805 c = *s++ & 0377;
806 goto printchar;
807 }
808 if (c == MACROEXPAND || c == MACRODEXPAND)
809 {
810 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT,
811 "%s$",
812 TermEscape.te_rv_on);
813 if (c == MACRODEXPAND)
814 (void) sm_io_putc(fp,
815 SM_TIME_DEFAULT, '&');
816 shiftout = true;
817 if (*s == '\0')
818 continue;
819 if (strchr("=~&?", *s) != NULL)
820 (void) sm_io_putc(fp,
821 SM_TIME_DEFAULT,
822 *s++);
823 if (bitset(0200, *s))
824 (void) sm_io_fprintf(fp,
825 SM_TIME_DEFAULT,
826 "{%s}",
827 macname(bitidx(*s++)));
828 else
829 (void) sm_io_fprintf(fp,
830 SM_TIME_DEFAULT,
831 "%c",
832 *s++);
833 continue;
834 }
835 for (mp = MetaMacros; mp->metaname != '\0'; mp++)
836 {
837 if (bitidx(mp->metaval) == c)
838 {
839 (void) sm_io_fprintf(fp,
840 SM_TIME_DEFAULT,
841 "%s$%c",
842 TermEscape.te_rv_on,
843 mp->metaname);
844 shiftout = true;
845 break;
846 }
847 }
848 if (c == MATCHCLASS || c == MATCHNCLASS)
849 {
850 if (bitset(0200, *s))
851 (void) sm_io_fprintf(fp,
852 SM_TIME_DEFAULT,
853 "{%s}",
854 macname(bitidx(*s++)));
855 else if (*s != '\0')
856 (void) sm_io_fprintf(fp,
857 SM_TIME_DEFAULT,
858 "%c",
859 *s++);
860 }
861 if (mp->metaname != '\0')
862 continue;
863
864 /* unrecognized meta character */
865 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%sM-",
866 TermEscape.te_rv_on);
867 shiftout = true;
868 c &= 0177;
869 }
870 printchar:
871 if (isascii(c) && isprint(c))
872 {
873 (void) sm_io_putc(fp, SM_TIME_DEFAULT, c);
874 continue;
875 }
876
877 /* wasn't a meta-macro -- find another way to print it */
878 switch (c)
879 {
880 case '\n':
881 c = 'n';
882 break;
883
884 case '\r':
885 c = 'r';
886 break;
887
888 case '\t':
889 c = 't';
890 break;
891 }
892 if (!shiftout)
893 {
894 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%s",
895 TermEscape.te_rv_on);
896 shiftout = true;
897 }
898 if (isascii(c) && isprint(c))
899 {
900 (void) sm_io_putc(fp, SM_TIME_DEFAULT, '\\');
901 (void) sm_io_putc(fp, SM_TIME_DEFAULT, c);
902 }
903 else if (tTd(84, 2))
904 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, " %o ", c);
905 else if (tTd(84, 1))
906 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, " %#x ", c);
907 else if (!isascii(c) && !tTd(84, 1))
908 {
909 (void) sm_io_putc(fp, SM_TIME_DEFAULT, '^');
910 (void) sm_io_putc(fp, SM_TIME_DEFAULT, c ^ 0100);
911 }
912 }
913 if (shiftout)
914 (void) sm_io_fprintf(fp, SM_TIME_DEFAULT, "%s",
915 TermEscape.te_normal);
916 (void) sm_io_flush(fp, SM_TIME_DEFAULT);
917 }
918
919 /*
920 ** MAKELOWER -- Translate a line into lower case
921 **
922 ** Parameters:
923 ** p -- the string to translate. If NULL, return is
924 ** immediate.
925 **
926 ** Returns:
927 ** none.
928 **
929 ** Side Effects:
930 ** String pointed to by p is translated to lower case.
931 */
932
933 void
makelower(p)934 makelower(p)
935 register char *p;
936 {
937 register char c;
938
939 if (p == NULL)
940 return;
941 for (; (c = *p) != '\0'; p++)
942 if (isascii(c) && isupper(c))
943 *p = tolower(c);
944 }
945
946 /*
947 ** FIXCRLF -- fix <CR><LF> in line.
948 **
949 ** Looks for the <CR><LF> combination and turns it into the
950 ** UNIX canonical <NL> character. It only takes one line,
951 ** i.e., it is assumed that the first <NL> found is the end
952 ** of the line.
953 **
954 ** Parameters:
955 ** line -- the line to fix.
956 ** stripnl -- if true, strip the newline also.
957 **
958 ** Returns:
959 ** none.
960 **
961 ** Side Effects:
962 ** line is changed in place.
963 */
964
965 void
fixcrlf(line,stripnl)966 fixcrlf(line, stripnl)
967 char *line;
968 bool stripnl;
969 {
970 register char *p;
971
972 p = strchr(line, '\n');
973 if (p == NULL)
974 return;
975 if (p > line && p[-1] == '\r')
976 p--;
977 if (!stripnl)
978 *p++ = '\n';
979 *p = '\0';
980 }
981
982 /*
983 ** PUTLINE -- put a line like fputs obeying SMTP conventions
984 **
985 ** This routine always guarantees outputing a newline (or CRLF,
986 ** as appropriate) at the end of the string.
987 **
988 ** Parameters:
989 ** l -- line to put.
990 ** mci -- the mailer connection information.
991 **
992 ** Returns:
993 ** true iff line was written successfully
994 **
995 ** Side Effects:
996 ** output of l to mci->mci_out.
997 */
998
999 bool
putline(l,mci)1000 putline(l, mci)
1001 register char *l;
1002 register MCI *mci;
1003 {
1004 return putxline(l, strlen(l), mci, PXLF_MAPFROM);
1005 }
1006
1007 /*
1008 ** PUTXLINE -- putline with flags bits.
1009 **
1010 ** This routine always guarantees outputing a newline (or CRLF,
1011 ** as appropriate) at the end of the string.
1012 **
1013 ** Parameters:
1014 ** l -- line to put.
1015 ** len -- the length of the line.
1016 ** mci -- the mailer connection information.
1017 ** pxflags -- flag bits:
1018 ** PXLF_MAPFROM -- map From_ to >From_.
1019 ** PXLF_STRIP8BIT -- strip 8th bit.
1020 ** PXLF_HEADER -- map bare newline in header to newline space.
1021 ** PXLF_NOADDEOL -- don't add an EOL if one wasn't present.
1022 ** PXLF_STRIPMQUOTE -- strip METAQUOTE bytes.
1023 **
1024 ** Returns:
1025 ** true iff line was written successfully
1026 **
1027 ** Side Effects:
1028 ** output of l to mci->mci_out.
1029 */
1030
1031
1032 #define PUTX(limit) \
1033 do \
1034 { \
1035 quotenext = false; \
1036 while (l < limit) \
1037 { \
1038 unsigned char c = (unsigned char) *l++; \
1039 \
1040 if (bitset(PXLF_STRIPMQUOTE, pxflags) && \
1041 !quotenext && c == METAQUOTE) \
1042 { \
1043 quotenext = true; \
1044 continue; \
1045 } \
1046 quotenext = false; \
1047 if (strip8bit) \
1048 c &= 0177; \
1049 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, \
1050 c) == SM_IO_EOF) \
1051 { \
1052 dead = true; \
1053 break; \
1054 } \
1055 if (TrafficLogFile != NULL) \
1056 (void) sm_io_putc(TrafficLogFile, \
1057 SM_TIME_DEFAULT, \
1058 c); \
1059 } \
1060 } while (0)
1061
1062 bool
putxline(l,len,mci,pxflags)1063 putxline(l, len, mci, pxflags)
1064 register char *l;
1065 size_t len;
1066 register MCI *mci;
1067 int pxflags;
1068 {
1069 register char *p, *end;
1070 int slop;
1071 bool dead, quotenext, strip8bit;
1072
1073 /* strip out 0200 bits -- these can look like TELNET protocol */
1074 strip8bit = bitset(MCIF_7BIT, mci->mci_flags) ||
1075 bitset(PXLF_STRIP8BIT, pxflags);
1076 dead = false;
1077 slop = 0;
1078
1079 end = l + len;
1080 do
1081 {
1082 bool noeol = false;
1083
1084 /* find the end of the line */
1085 p = memchr(l, '\n', end - l);
1086 if (p == NULL)
1087 {
1088 p = end;
1089 noeol = true;
1090 }
1091
1092 if (TrafficLogFile != NULL)
1093 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
1094 "%05d >>> ", (int) CurrentPid);
1095
1096 /* check for line overflow */
1097 while (mci->mci_mailer->m_linelimit > 0 &&
1098 (p - l + slop) > mci->mci_mailer->m_linelimit)
1099 {
1100 register char *q = &l[mci->mci_mailer->m_linelimit - slop - 1];
1101
1102 if (l[0] == '.' && slop == 0 &&
1103 bitnset(M_XDOT, mci->mci_mailer->m_flags))
1104 {
1105 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
1106 '.') == SM_IO_EOF)
1107 dead = true;
1108 if (TrafficLogFile != NULL)
1109 (void) sm_io_putc(TrafficLogFile,
1110 SM_TIME_DEFAULT, '.');
1111 }
1112 else if (l[0] == 'F' && slop == 0 &&
1113 bitset(PXLF_MAPFROM, pxflags) &&
1114 strncmp(l, "From ", 5) == 0 &&
1115 bitnset(M_ESCFROM, mci->mci_mailer->m_flags))
1116 {
1117 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
1118 '>') == SM_IO_EOF)
1119 dead = true;
1120 if (TrafficLogFile != NULL)
1121 (void) sm_io_putc(TrafficLogFile,
1122 SM_TIME_DEFAULT,
1123 '>');
1124 }
1125 if (dead)
1126 break;
1127
1128 PUTX(q);
1129 if (dead)
1130 break;
1131
1132 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
1133 '!') == SM_IO_EOF ||
1134 sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT,
1135 mci->mci_mailer->m_eol) == SM_IO_EOF ||
1136 sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
1137 ' ') == SM_IO_EOF)
1138 {
1139 dead = true;
1140 break;
1141 }
1142 if (TrafficLogFile != NULL)
1143 {
1144 (void) sm_io_fprintf(TrafficLogFile,
1145 SM_TIME_DEFAULT,
1146 "!\n%05d >>> ",
1147 (int) CurrentPid);
1148 }
1149 slop = 1;
1150 }
1151
1152 if (dead)
1153 break;
1154
1155 /* output last part */
1156 if (l[0] == '.' && slop == 0 &&
1157 bitnset(M_XDOT, mci->mci_mailer->m_flags) &&
1158 !bitset(MCIF_INLONGLINE, mci->mci_flags))
1159 {
1160 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, '.') ==
1161 SM_IO_EOF)
1162 {
1163 dead = true;
1164 break;
1165 }
1166 if (TrafficLogFile != NULL)
1167 (void) sm_io_putc(TrafficLogFile,
1168 SM_TIME_DEFAULT, '.');
1169 }
1170 else if (l[0] == 'F' && slop == 0 &&
1171 bitset(PXLF_MAPFROM, pxflags) &&
1172 strncmp(l, "From ", 5) == 0 &&
1173 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) &&
1174 !bitset(MCIF_INLONGLINE, mci->mci_flags))
1175 {
1176 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT, '>') ==
1177 SM_IO_EOF)
1178 {
1179 dead = true;
1180 break;
1181 }
1182 if (TrafficLogFile != NULL)
1183 (void) sm_io_putc(TrafficLogFile,
1184 SM_TIME_DEFAULT, '>');
1185 }
1186 PUTX(p);
1187 if (dead)
1188 break;
1189
1190 if (TrafficLogFile != NULL)
1191 (void) sm_io_putc(TrafficLogFile, SM_TIME_DEFAULT,
1192 '\n');
1193 if ((!bitset(PXLF_NOADDEOL, pxflags) || !noeol))
1194 {
1195 mci->mci_flags &= ~MCIF_INLONGLINE;
1196 if (sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT,
1197 mci->mci_mailer->m_eol) == SM_IO_EOF)
1198 {
1199 dead = true;
1200 break;
1201 }
1202 }
1203 else
1204 mci->mci_flags |= MCIF_INLONGLINE;
1205
1206 if (l < end && *l == '\n')
1207 {
1208 if (*++l != ' ' && *l != '\t' && *l != '\0' &&
1209 bitset(PXLF_HEADER, pxflags))
1210 {
1211 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
1212 ' ') == SM_IO_EOF)
1213 {
1214 dead = true;
1215 break;
1216 }
1217
1218 if (TrafficLogFile != NULL)
1219 (void) sm_io_putc(TrafficLogFile,
1220 SM_TIME_DEFAULT, ' ');
1221 }
1222 }
1223
1224 } while (l < end);
1225 return !dead;
1226 }
1227
1228 /*
1229 ** XUNLINK -- unlink a file, doing logging as appropriate.
1230 **
1231 ** Parameters:
1232 ** f -- name of file to unlink.
1233 **
1234 ** Returns:
1235 ** return value of unlink()
1236 **
1237 ** Side Effects:
1238 ** f is unlinked.
1239 */
1240
1241 int
xunlink(f)1242 xunlink(f)
1243 char *f;
1244 {
1245 register int i;
1246 int save_errno;
1247
1248 if (LogLevel > 98)
1249 sm_syslog(LOG_DEBUG, CurEnv->e_id, "unlink %s", f);
1250
1251 i = unlink(f);
1252 save_errno = errno;
1253 if (i < 0 && LogLevel > 97)
1254 sm_syslog(LOG_DEBUG, CurEnv->e_id, "%s: unlink-fail %d",
1255 f, errno);
1256 if (i >= 0)
1257 SYNC_DIR(f, false);
1258 errno = save_errno;
1259 return i;
1260 }
1261
1262 /*
1263 ** SFGETS -- "safe" fgets -- times out and ignores random interrupts.
1264 **
1265 ** Parameters:
1266 ** buf -- place to put the input line.
1267 ** siz -- size of buf.
1268 ** fp -- file to read from.
1269 ** timeout -- the timeout before error occurs.
1270 ** during -- what we are trying to read (for error messages).
1271 **
1272 ** Returns:
1273 ** NULL on error (including timeout). This may also leave
1274 ** buf containing a null string.
1275 ** buf otherwise.
1276 */
1277
1278
1279 char *
sfgets(buf,siz,fp,timeout,during)1280 sfgets(buf, siz, fp, timeout, during)
1281 char *buf;
1282 int siz;
1283 SM_FILE_T *fp;
1284 time_t timeout;
1285 char *during;
1286 {
1287 register char *p;
1288 int save_errno;
1289 int io_timeout;
1290
1291 SM_REQUIRE(siz > 0);
1292 SM_REQUIRE(buf != NULL);
1293
1294 if (fp == NULL)
1295 {
1296 buf[0] = '\0';
1297 errno = EBADF;
1298 return NULL;
1299 }
1300
1301 /* try to read */
1302 p = NULL;
1303 errno = 0;
1304
1305 /* convert the timeout to sm_io notation */
1306 io_timeout = (timeout <= 0) ? SM_TIME_DEFAULT : timeout * 1000;
1307 while (!sm_io_eof(fp) && !sm_io_error(fp))
1308 {
1309 errno = 0;
1310 p = sm_io_fgets(fp, io_timeout, buf, siz);
1311 if (p == NULL && errno == EAGAIN)
1312 {
1313 /* The sm_io_fgets() call timedout */
1314 if (LogLevel > 1)
1315 sm_syslog(LOG_NOTICE, CurEnv->e_id,
1316 "timeout waiting for input from %.100s during %s",
1317 CURHOSTNAME,
1318 during);
1319 buf[0] = '\0';
1320 #if XDEBUG
1321 checkfd012(during);
1322 #endif /* XDEBUG */
1323 if (TrafficLogFile != NULL)
1324 (void) sm_io_fprintf(TrafficLogFile,
1325 SM_TIME_DEFAULT,
1326 "%05d <<< [TIMEOUT]\n",
1327 (int) CurrentPid);
1328 errno = ETIMEDOUT;
1329 return NULL;
1330 }
1331 if (p != NULL || errno != EINTR)
1332 break;
1333 (void) sm_io_clearerr(fp);
1334 }
1335 save_errno = errno;
1336
1337 /* clean up the books and exit */
1338 LineNumber++;
1339 if (p == NULL)
1340 {
1341 buf[0] = '\0';
1342 if (TrafficLogFile != NULL)
1343 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
1344 "%05d <<< [EOF]\n",
1345 (int) CurrentPid);
1346 errno = save_errno;
1347 return NULL;
1348 }
1349 if (TrafficLogFile != NULL)
1350 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
1351 "%05d <<< %s", (int) CurrentPid, buf);
1352 if (SevenBitInput)
1353 {
1354 for (p = buf; *p != '\0'; p++)
1355 *p &= ~0200;
1356 }
1357 else if (!HasEightBits)
1358 {
1359 for (p = buf; *p != '\0'; p++)
1360 {
1361 if (bitset(0200, *p))
1362 {
1363 HasEightBits = true;
1364 break;
1365 }
1366 }
1367 }
1368 return buf;
1369 }
1370
1371 /*
1372 ** FGETFOLDED -- like fgets, but knows about folded lines.
1373 **
1374 ** Parameters:
1375 ** buf -- place to put result.
1376 ** np -- pointer to bytes available; will be updated with
1377 ** the actual buffer size (not number of bytes filled)
1378 ** on return.
1379 ** f -- file to read from.
1380 **
1381 ** Returns:
1382 ** input line(s) on success, NULL on error or SM_IO_EOF.
1383 ** This will normally be buf -- unless the line is too
1384 ** long, when it will be sm_malloc_x()ed.
1385 **
1386 ** Side Effects:
1387 ** buf gets lines from f, with continuation lines (lines
1388 ** with leading white space) appended. CRLF's are mapped
1389 ** into single newlines. Any trailing NL is stripped.
1390 */
1391
1392 char *
fgetfolded(buf,np,f)1393 fgetfolded(buf, np, f)
1394 char *buf;
1395 int *np;
1396 SM_FILE_T *f;
1397 {
1398 register char *p = buf;
1399 char *bp = buf;
1400 register int i;
1401 int n;
1402
1403 SM_REQUIRE(np != NULL);
1404 n = *np;
1405 SM_REQUIRE(n > 0);
1406 SM_REQUIRE(buf != NULL);
1407 if (f == NULL)
1408 {
1409 buf[0] = '\0';
1410 errno = EBADF;
1411 return NULL;
1412 }
1413
1414 n--;
1415 while ((i = sm_io_getc(f, SM_TIME_DEFAULT)) != SM_IO_EOF)
1416 {
1417 if (i == '\r')
1418 {
1419 i = sm_io_getc(f, SM_TIME_DEFAULT);
1420 if (i != '\n')
1421 {
1422 if (i != SM_IO_EOF)
1423 (void) sm_io_ungetc(f, SM_TIME_DEFAULT,
1424 i);
1425 i = '\r';
1426 }
1427 }
1428 if (--n <= 0)
1429 {
1430 /* allocate new space */
1431 char *nbp;
1432 int nn;
1433
1434 nn = (p - bp);
1435 if (nn < MEMCHUNKSIZE)
1436 nn *= 2;
1437 else
1438 nn += MEMCHUNKSIZE;
1439 nbp = sm_malloc_x(nn);
1440 memmove(nbp, bp, p - bp);
1441 p = &nbp[p - bp];
1442 if (bp != buf)
1443 sm_free(bp);
1444 bp = nbp;
1445 n = nn - (p - bp);
1446 *np = nn;
1447 }
1448 *p++ = i;
1449 if (i == '\n')
1450 {
1451 LineNumber++;
1452 i = sm_io_getc(f, SM_TIME_DEFAULT);
1453 if (i != SM_IO_EOF)
1454 (void) sm_io_ungetc(f, SM_TIME_DEFAULT, i);
1455 if (i != ' ' && i != '\t')
1456 break;
1457 }
1458 }
1459 if (p == bp)
1460 return NULL;
1461 if (p[-1] == '\n')
1462 p--;
1463 *p = '\0';
1464 return bp;
1465 }
1466
1467 /*
1468 ** CURTIME -- return current time.
1469 **
1470 ** Parameters:
1471 ** none.
1472 **
1473 ** Returns:
1474 ** the current time.
1475 */
1476
1477 time_t
curtime()1478 curtime()
1479 {
1480 auto time_t t;
1481
1482 (void) time(&t);
1483 return t;
1484 }
1485
1486 /*
1487 ** ATOBOOL -- convert a string representation to boolean.
1488 **
1489 ** Defaults to false
1490 **
1491 ** Parameters:
1492 ** s -- string to convert. Takes "tTyY", empty, and NULL as true,
1493 ** others as false.
1494 **
1495 ** Returns:
1496 ** A boolean representation of the string.
1497 */
1498
1499 bool
atobool(s)1500 atobool(s)
1501 register char *s;
1502 {
1503 if (s == NULL || *s == '\0' || strchr("tTyY", *s) != NULL)
1504 return true;
1505 return false;
1506 }
1507
1508 /*
1509 ** ATOOCT -- convert a string representation to octal.
1510 **
1511 ** Parameters:
1512 ** s -- string to convert.
1513 **
1514 ** Returns:
1515 ** An integer representing the string interpreted as an
1516 ** octal number.
1517 */
1518
1519 int
atooct(s)1520 atooct(s)
1521 register char *s;
1522 {
1523 register int i = 0;
1524
1525 while (*s >= '0' && *s <= '7')
1526 i = (i << 3) | (*s++ - '0');
1527 return i;
1528 }
1529
1530 /*
1531 ** BITINTERSECT -- tell if two bitmaps intersect
1532 **
1533 ** Parameters:
1534 ** a, b -- the bitmaps in question
1535 **
1536 ** Returns:
1537 ** true if they have a non-null intersection
1538 ** false otherwise
1539 */
1540
1541 bool
bitintersect(a,b)1542 bitintersect(a, b)
1543 BITMAP256 a;
1544 BITMAP256 b;
1545 {
1546 int i;
1547
1548 for (i = BITMAPBYTES / sizeof(int); --i >= 0; )
1549 {
1550 if ((a[i] & b[i]) != 0)
1551 return true;
1552 }
1553 return false;
1554 }
1555
1556 /*
1557 ** BITZEROP -- tell if a bitmap is all zero
1558 **
1559 ** Parameters:
1560 ** map -- the bit map to check
1561 **
1562 ** Returns:
1563 ** true if map is all zero.
1564 ** false if there are any bits set in map.
1565 */
1566
1567 bool
bitzerop(map)1568 bitzerop(map)
1569 BITMAP256 map;
1570 {
1571 int i;
1572
1573 for (i = BITMAPBYTES / sizeof(int); --i >= 0; )
1574 {
1575 if (map[i] != 0)
1576 return false;
1577 }
1578 return true;
1579 }
1580
1581 /*
1582 ** STRCONTAINEDIN -- tell if one string is contained in another
1583 **
1584 ** Parameters:
1585 ** icase -- ignore case?
1586 ** a -- possible substring.
1587 ** b -- possible superstring.
1588 **
1589 ** Returns:
1590 ** true if a is contained in b (case insensitive).
1591 ** false otherwise.
1592 */
1593
1594 bool
strcontainedin(icase,a,b)1595 strcontainedin(icase, a, b)
1596 bool icase;
1597 register char *a;
1598 register char *b;
1599 {
1600 int la;
1601 int lb;
1602 int c;
1603
1604 la = strlen(a);
1605 lb = strlen(b);
1606 c = *a;
1607 if (icase && isascii(c) && isupper(c))
1608 c = tolower(c);
1609 for (; lb-- >= la; b++)
1610 {
1611 if (icase)
1612 {
1613 if (*b != c &&
1614 isascii(*b) && isupper(*b) && tolower(*b) != c)
1615 continue;
1616 if (sm_strncasecmp(a, b, la) == 0)
1617 return true;
1618 }
1619 else
1620 {
1621 if (*b != c)
1622 continue;
1623 if (strncmp(a, b, la) == 0)
1624 return true;
1625 }
1626 }
1627 return false;
1628 }
1629
1630 /*
1631 ** CHECKFD012 -- check low numbered file descriptors
1632 **
1633 ** File descriptors 0, 1, and 2 should be open at all times.
1634 ** This routine verifies that, and fixes it if not true.
1635 **
1636 ** Parameters:
1637 ** where -- a tag printed if the assertion failed
1638 **
1639 ** Returns:
1640 ** none
1641 */
1642
1643 void
checkfd012(where)1644 checkfd012(where)
1645 char *where;
1646 {
1647 #if XDEBUG
1648 register int i;
1649
1650 for (i = 0; i < 3; i++)
1651 fill_fd(i, where);
1652 #endif /* XDEBUG */
1653 }
1654
1655 /*
1656 ** CHECKFDOPEN -- make sure file descriptor is open -- for extended debugging
1657 **
1658 ** Parameters:
1659 ** fd -- file descriptor to check.
1660 ** where -- tag to print on failure.
1661 **
1662 ** Returns:
1663 ** none.
1664 */
1665
1666 void
checkfdopen(fd,where)1667 checkfdopen(fd, where)
1668 int fd;
1669 char *where;
1670 {
1671 #if XDEBUG
1672 struct stat st;
1673
1674 if (fstat(fd, &st) < 0 && errno == EBADF)
1675 {
1676 syserr("checkfdopen(%d): %s not open as expected!", fd, where);
1677 printopenfds(true);
1678 }
1679 #endif /* XDEBUG */
1680 }
1681
1682 /*
1683 ** CHECKFDS -- check for new or missing file descriptors
1684 **
1685 ** Parameters:
1686 ** where -- tag for printing. If null, take a base line.
1687 **
1688 ** Returns:
1689 ** none
1690 **
1691 ** Side Effects:
1692 ** If where is set, shows changes since the last call.
1693 */
1694
1695 void
checkfds(where)1696 checkfds(where)
1697 char *where;
1698 {
1699 int maxfd;
1700 register int fd;
1701 bool printhdr = true;
1702 int save_errno = errno;
1703 static BITMAP256 baseline;
1704 extern int DtableSize;
1705
1706 if (DtableSize > BITMAPBITS)
1707 maxfd = BITMAPBITS;
1708 else
1709 maxfd = DtableSize;
1710 if (where == NULL)
1711 clrbitmap(baseline);
1712
1713 for (fd = 0; fd < maxfd; fd++)
1714 {
1715 struct stat stbuf;
1716
1717 if (fstat(fd, &stbuf) < 0 && errno != EOPNOTSUPP)
1718 {
1719 if (!bitnset(fd, baseline))
1720 continue;
1721 clrbitn(fd, baseline);
1722 }
1723 else if (!bitnset(fd, baseline))
1724 setbitn(fd, baseline);
1725 else
1726 continue;
1727
1728 /* file state has changed */
1729 if (where == NULL)
1730 continue;
1731 if (printhdr)
1732 {
1733 sm_syslog(LOG_DEBUG, CurEnv->e_id,
1734 "%s: changed fds:",
1735 where);
1736 printhdr = false;
1737 }
1738 dumpfd(fd, true, true);
1739 }
1740 errno = save_errno;
1741 }
1742
1743 /*
1744 ** PRINTOPENFDS -- print the open file descriptors (for debugging)
1745 **
1746 ** Parameters:
1747 ** logit -- if set, send output to syslog; otherwise
1748 ** print for debugging.
1749 **
1750 ** Returns:
1751 ** none.
1752 */
1753
1754 #if NETINET || NETINET6
1755 # include <arpa/inet.h>
1756 #endif /* NETINET || NETINET6 */
1757
1758 void
printopenfds(logit)1759 printopenfds(logit)
1760 bool logit;
1761 {
1762 register int fd;
1763 extern int DtableSize;
1764
1765 for (fd = 0; fd < DtableSize; fd++)
1766 dumpfd(fd, false, logit);
1767 }
1768
1769 /*
1770 ** DUMPFD -- dump a file descriptor
1771 **
1772 ** Parameters:
1773 ** fd -- the file descriptor to dump.
1774 ** printclosed -- if set, print a notification even if
1775 ** it is closed; otherwise print nothing.
1776 ** logit -- if set, use sm_syslog instead of sm_dprintf()
1777 **
1778 ** Returns:
1779 ** none.
1780 */
1781
1782 void
dumpfd(fd,printclosed,logit)1783 dumpfd(fd, printclosed, logit)
1784 int fd;
1785 bool printclosed;
1786 bool logit;
1787 {
1788 register char *p;
1789 char *hp;
1790 #ifdef S_IFSOCK
1791 SOCKADDR sa;
1792 #endif /* S_IFSOCK */
1793 auto SOCKADDR_LEN_T slen;
1794 int i;
1795 #if STAT64 > 0
1796 struct stat64 st;
1797 #else /* STAT64 > 0 */
1798 struct stat st;
1799 #endif /* STAT64 > 0 */
1800 char buf[200];
1801
1802 p = buf;
1803 (void) sm_snprintf(p, SPACELEFT(buf, p), "%3d: ", fd);
1804 p += strlen(p);
1805
1806 if (
1807 #if STAT64 > 0
1808 fstat64(fd, &st)
1809 #else /* STAT64 > 0 */
1810 fstat(fd, &st)
1811 #endif /* STAT64 > 0 */
1812 < 0)
1813 {
1814 if (errno != EBADF)
1815 {
1816 (void) sm_snprintf(p, SPACELEFT(buf, p),
1817 "CANNOT STAT (%s)",
1818 sm_errstring(errno));
1819 goto printit;
1820 }
1821 else if (printclosed)
1822 {
1823 (void) sm_snprintf(p, SPACELEFT(buf, p), "CLOSED");
1824 goto printit;
1825 }
1826 return;
1827 }
1828
1829 i = fcntl(fd, F_GETFL, 0);
1830 if (i != -1)
1831 {
1832 (void) sm_snprintf(p, SPACELEFT(buf, p), "fl=0x%x, ", i);
1833 p += strlen(p);
1834 }
1835
1836 (void) sm_snprintf(p, SPACELEFT(buf, p), "mode=%o: ",
1837 (int) st.st_mode);
1838 p += strlen(p);
1839 switch (st.st_mode & S_IFMT)
1840 {
1841 #ifdef S_IFSOCK
1842 case S_IFSOCK:
1843 (void) sm_snprintf(p, SPACELEFT(buf, p), "SOCK ");
1844 p += strlen(p);
1845 memset(&sa, '\0', sizeof(sa));
1846 slen = sizeof(sa);
1847 if (getsockname(fd, &sa.sa, &slen) < 0)
1848 (void) sm_snprintf(p, SPACELEFT(buf, p), "(%s)",
1849 sm_errstring(errno));
1850 else
1851 {
1852 hp = hostnamebyanyaddr(&sa);
1853 if (hp == NULL)
1854 {
1855 /* EMPTY */
1856 /* do nothing */
1857 }
1858 # if NETINET
1859 else if (sa.sa.sa_family == AF_INET)
1860 (void) sm_snprintf(p, SPACELEFT(buf, p),
1861 "%s/%d", hp, ntohs(sa.sin.sin_port));
1862 # endif /* NETINET */
1863 # if NETINET6
1864 else if (sa.sa.sa_family == AF_INET6)
1865 (void) sm_snprintf(p, SPACELEFT(buf, p),
1866 "%s/%d", hp, ntohs(sa.sin6.sin6_port));
1867 # endif /* NETINET6 */
1868 else
1869 (void) sm_snprintf(p, SPACELEFT(buf, p),
1870 "%s", hp);
1871 }
1872 p += strlen(p);
1873 (void) sm_snprintf(p, SPACELEFT(buf, p), "->");
1874 p += strlen(p);
1875 slen = sizeof(sa);
1876 if (getpeername(fd, &sa.sa, &slen) < 0)
1877 (void) sm_snprintf(p, SPACELEFT(buf, p), "(%s)",
1878 sm_errstring(errno));
1879 else
1880 {
1881 hp = hostnamebyanyaddr(&sa);
1882 if (hp == NULL)
1883 {
1884 /* EMPTY */
1885 /* do nothing */
1886 }
1887 # if NETINET
1888 else if (sa.sa.sa_family == AF_INET)
1889 (void) sm_snprintf(p, SPACELEFT(buf, p),
1890 "%s/%d", hp, ntohs(sa.sin.sin_port));
1891 # endif /* NETINET */
1892 # if NETINET6
1893 else if (sa.sa.sa_family == AF_INET6)
1894 (void) sm_snprintf(p, SPACELEFT(buf, p),
1895 "%s/%d", hp, ntohs(sa.sin6.sin6_port));
1896 # endif /* NETINET6 */
1897 else
1898 (void) sm_snprintf(p, SPACELEFT(buf, p),
1899 "%s", hp);
1900 }
1901 break;
1902 #endif /* S_IFSOCK */
1903
1904 case S_IFCHR:
1905 (void) sm_snprintf(p, SPACELEFT(buf, p), "CHR: ");
1906 p += strlen(p);
1907 goto defprint;
1908
1909 #ifdef S_IFBLK
1910 case S_IFBLK:
1911 (void) sm_snprintf(p, SPACELEFT(buf, p), "BLK: ");
1912 p += strlen(p);
1913 goto defprint;
1914 #endif /* S_IFBLK */
1915
1916 #if defined(S_IFIFO) && (!defined(S_IFSOCK) || S_IFIFO != S_IFSOCK)
1917 case S_IFIFO:
1918 (void) sm_snprintf(p, SPACELEFT(buf, p), "FIFO: ");
1919 p += strlen(p);
1920 goto defprint;
1921 #endif /* defined(S_IFIFO) && (!defined(S_IFSOCK) || S_IFIFO != S_IFSOCK) */
1922
1923 #ifdef S_IFDIR
1924 case S_IFDIR:
1925 (void) sm_snprintf(p, SPACELEFT(buf, p), "DIR: ");
1926 p += strlen(p);
1927 goto defprint;
1928 #endif /* S_IFDIR */
1929
1930 #ifdef S_IFLNK
1931 case S_IFLNK:
1932 (void) sm_snprintf(p, SPACELEFT(buf, p), "LNK: ");
1933 p += strlen(p);
1934 goto defprint;
1935 #endif /* S_IFLNK */
1936
1937 default:
1938 defprint:
1939 (void) sm_snprintf(p, SPACELEFT(buf, p),
1940 "dev=%d/%d, ino=%llu, nlink=%d, u/gid=%d/%d, ",
1941 major(st.st_dev), minor(st.st_dev),
1942 (ULONGLONG_T) st.st_ino,
1943 (int) st.st_nlink, (int) st.st_uid,
1944 (int) st.st_gid);
1945 p += strlen(p);
1946 (void) sm_snprintf(p, SPACELEFT(buf, p), "size=%llu",
1947 (ULONGLONG_T) st.st_size);
1948 break;
1949 }
1950
1951 printit:
1952 if (logit)
1953 sm_syslog(LOG_DEBUG, CurEnv ? CurEnv->e_id : NULL,
1954 "%.800s", buf);
1955 else
1956 sm_dprintf("%s\n", buf);
1957 }
1958
1959 /*
1960 ** SHORTEN_HOSTNAME -- strip local domain information off of hostname.
1961 **
1962 ** Parameters:
1963 ** host -- the host to shorten (stripped in place).
1964 **
1965 ** Returns:
1966 ** place where string was truncated, NULL if not truncated.
1967 */
1968
1969 char *
shorten_hostname(host)1970 shorten_hostname(host)
1971 char host[];
1972 {
1973 register char *p;
1974 char *mydom;
1975 int i;
1976 bool canon = false;
1977
1978 /* strip off final dot */
1979 i = strlen(host);
1980 p = &host[(i == 0) ? 0 : i - 1];
1981 if (*p == '.')
1982 {
1983 *p = '\0';
1984 canon = true;
1985 }
1986
1987 /* see if there is any domain at all -- if not, we are done */
1988 p = strchr(host, '.');
1989 if (p == NULL)
1990 return NULL;
1991
1992 /* yes, we have a domain -- see if it looks like us */
1993 mydom = macvalue('m', CurEnv);
1994 if (mydom == NULL)
1995 mydom = "";
1996 i = strlen(++p);
1997 if ((canon ? sm_strcasecmp(p, mydom)
1998 : sm_strncasecmp(p, mydom, i)) == 0 &&
1999 (mydom[i] == '.' || mydom[i] == '\0'))
2000 {
2001 *--p = '\0';
2002 return p;
2003 }
2004 return NULL;
2005 }
2006
2007 /*
2008 ** PROG_OPEN -- open a program for reading
2009 **
2010 ** Parameters:
2011 ** argv -- the argument list.
2012 ** pfd -- pointer to a place to store the file descriptor.
2013 ** e -- the current envelope.
2014 **
2015 ** Returns:
2016 ** pid of the process -- -1 if it failed.
2017 */
2018
2019 pid_t
prog_open(argv,pfd,e)2020 prog_open(argv, pfd, e)
2021 char **argv;
2022 int *pfd;
2023 ENVELOPE *e;
2024 {
2025 pid_t pid;
2026 int save_errno;
2027 int sff;
2028 int ret;
2029 int fdv[2];
2030 char *p, *q;
2031 char buf[MAXPATHLEN];
2032 extern int DtableSize;
2033
2034 if (pipe(fdv) < 0)
2035 {
2036 syserr("%s: cannot create pipe for stdout", argv[0]);
2037 return -1;
2038 }
2039 pid = fork();
2040 if (pid < 0)
2041 {
2042 syserr("%s: cannot fork", argv[0]);
2043 (void) close(fdv[0]);
2044 (void) close(fdv[1]);
2045 return -1;
2046 }
2047 if (pid > 0)
2048 {
2049 /* parent */
2050 (void) close(fdv[1]);
2051 *pfd = fdv[0];
2052 return pid;
2053 }
2054
2055 /* Reset global flags */
2056 RestartRequest = NULL;
2057 RestartWorkGroup = false;
2058 ShutdownRequest = NULL;
2059 PendingSignal = 0;
2060 CurrentPid = getpid();
2061
2062 /*
2063 ** Initialize exception stack and default exception
2064 ** handler for child process.
2065 */
2066
2067 sm_exc_newthread(fatal_error);
2068
2069 /* child -- close stdin */
2070 (void) close(0);
2071
2072 /* stdout goes back to parent */
2073 (void) close(fdv[0]);
2074 if (dup2(fdv[1], 1) < 0)
2075 {
2076 syserr("%s: cannot dup2 for stdout", argv[0]);
2077 _exit(EX_OSERR);
2078 }
2079 (void) close(fdv[1]);
2080
2081 /* stderr goes to transcript if available */
2082 if (e->e_xfp != NULL)
2083 {
2084 int xfd;
2085
2086 xfd = sm_io_getinfo(e->e_xfp, SM_IO_WHAT_FD, NULL);
2087 if (xfd >= 0 && dup2(xfd, 2) < 0)
2088 {
2089 syserr("%s: cannot dup2 for stderr", argv[0]);
2090 _exit(EX_OSERR);
2091 }
2092 }
2093
2094 /* this process has no right to the queue file */
2095 if (e->e_lockfp != NULL)
2096 {
2097 int fd;
2098
2099 fd = sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD, NULL);
2100 if (fd >= 0)
2101 (void) close(fd);
2102 else
2103 syserr("%s: lockfp does not have a fd", argv[0]);
2104 }
2105
2106 /* chroot to the program mailer directory, if defined */
2107 if (ProgMailer != NULL && ProgMailer->m_rootdir != NULL)
2108 {
2109 expand(ProgMailer->m_rootdir, buf, sizeof(buf), e);
2110 if (chroot(buf) < 0)
2111 {
2112 syserr("prog_open: cannot chroot(%s)", buf);
2113 exit(EX_TEMPFAIL);
2114 }
2115 if (chdir("/") < 0)
2116 {
2117 syserr("prog_open: cannot chdir(/)");
2118 exit(EX_TEMPFAIL);
2119 }
2120 }
2121
2122 /* run as default user */
2123 endpwent();
2124 sm_mbdb_terminate();
2125 #if _FFR_MEMSTAT
2126 (void) sm_memstat_close();
2127 #endif /* _FFR_MEMSTAT */
2128 if (setgid(DefGid) < 0 && geteuid() == 0)
2129 {
2130 syserr("prog_open: setgid(%ld) failed", (long) DefGid);
2131 exit(EX_TEMPFAIL);
2132 }
2133 if (setuid(DefUid) < 0 && geteuid() == 0)
2134 {
2135 syserr("prog_open: setuid(%ld) failed", (long) DefUid);
2136 exit(EX_TEMPFAIL);
2137 }
2138
2139 /* run in some directory */
2140 if (ProgMailer != NULL)
2141 p = ProgMailer->m_execdir;
2142 else
2143 p = NULL;
2144 for (; p != NULL; p = q)
2145 {
2146 q = strchr(p, ':');
2147 if (q != NULL)
2148 *q = '\0';
2149 expand(p, buf, sizeof(buf), e);
2150 if (q != NULL)
2151 *q++ = ':';
2152 if (buf[0] != '\0' && chdir(buf) >= 0)
2153 break;
2154 }
2155 if (p == NULL)
2156 {
2157 /* backup directories */
2158 if (chdir("/tmp") < 0)
2159 (void) chdir("/");
2160 }
2161
2162 /* Check safety of program to be run */
2163 sff = SFF_ROOTOK|SFF_EXECOK;
2164 if (!bitnset(DBS_RUNWRITABLEPROGRAM, DontBlameSendmail))
2165 sff |= SFF_NOGWFILES|SFF_NOWWFILES;
2166 if (bitnset(DBS_RUNPROGRAMINUNSAFEDIRPATH, DontBlameSendmail))
2167 sff |= SFF_NOPATHCHECK;
2168 else
2169 sff |= SFF_SAFEDIRPATH;
2170 ret = safefile(argv[0], DefUid, DefGid, DefUser, sff, 0, NULL);
2171 if (ret != 0)
2172 sm_syslog(LOG_INFO, e->e_id,
2173 "Warning: prog_open: program %s unsafe: %s",
2174 argv[0], sm_errstring(ret));
2175
2176 /* arrange for all the files to be closed */
2177 sm_close_on_exec(STDERR_FILENO + 1, DtableSize);
2178
2179 /* now exec the process */
2180 (void) execve(argv[0], (ARGV_T) argv, (ARGV_T) UserEnviron);
2181
2182 /* woops! failed */
2183 save_errno = errno;
2184 syserr("%s: cannot exec", argv[0]);
2185 if (transienterror(save_errno))
2186 _exit(EX_OSERR);
2187 _exit(EX_CONFIG);
2188 return -1; /* avoid compiler warning on IRIX */
2189 }
2190
2191 /*
2192 ** GET_COLUMN -- look up a Column in a line buffer
2193 **
2194 ** Parameters:
2195 ** line -- the raw text line to search.
2196 ** col -- the column number to fetch.
2197 ** delim -- the delimiter between columns. If null,
2198 ** use white space.
2199 ** buf -- the output buffer.
2200 ** buflen -- the length of buf.
2201 **
2202 ** Returns:
2203 ** buf if successful.
2204 ** NULL otherwise.
2205 */
2206
2207 char *
get_column(line,col,delim,buf,buflen)2208 get_column(line, col, delim, buf, buflen)
2209 char line[];
2210 int col;
2211 int delim;
2212 char buf[];
2213 int buflen;
2214 {
2215 char *p;
2216 char *begin, *end;
2217 int i;
2218 char delimbuf[4];
2219
2220 if ((char) delim == '\0')
2221 (void) sm_strlcpy(delimbuf, "\n\t ", sizeof(delimbuf));
2222 else
2223 {
2224 delimbuf[0] = (char) delim;
2225 delimbuf[1] = '\0';
2226 }
2227
2228 p = line;
2229 if (*p == '\0')
2230 return NULL; /* line empty */
2231 if (*p == (char) delim && col == 0)
2232 return NULL; /* first column empty */
2233
2234 begin = line;
2235
2236 if (col == 0 && (char) delim == '\0')
2237 {
2238 while (*begin != '\0' && isascii(*begin) && isspace(*begin))
2239 begin++;
2240 }
2241
2242 for (i = 0; i < col; i++)
2243 {
2244 if ((begin = strpbrk(begin, delimbuf)) == NULL)
2245 return NULL; /* no such column */
2246 begin++;
2247 if ((char) delim == '\0')
2248 {
2249 while (*begin != '\0' && isascii(*begin) && isspace(*begin))
2250 begin++;
2251 }
2252 }
2253
2254 end = strpbrk(begin, delimbuf);
2255 if (end == NULL)
2256 i = strlen(begin);
2257 else
2258 i = end - begin;
2259 if (i >= buflen)
2260 i = buflen - 1;
2261 (void) sm_strlcpy(buf, begin, i + 1);
2262 return buf;
2263 }
2264
2265 /*
2266 ** CLEANSTRCPY -- copy string keeping out bogus characters
2267 **
2268 ** Parameters:
2269 ** t -- "to" string.
2270 ** f -- "from" string.
2271 ** l -- length of space available in "to" string.
2272 **
2273 ** Returns:
2274 ** none.
2275 */
2276
2277 void
cleanstrcpy(t,f,l)2278 cleanstrcpy(t, f, l)
2279 register char *t;
2280 register char *f;
2281 int l;
2282 {
2283 /* check for newlines and log if necessary */
2284 (void) denlstring(f, true, true);
2285
2286 if (l <= 0)
2287 syserr("!cleanstrcpy: length == 0");
2288
2289 l--;
2290 while (l > 0 && *f != '\0')
2291 {
2292 if (isascii(*f) &&
2293 (isalnum(*f) || strchr("!#$%&'*+-./^_`{|}~", *f) != NULL))
2294 {
2295 l--;
2296 *t++ = *f;
2297 }
2298 f++;
2299 }
2300 *t = '\0';
2301 }
2302
2303 /*
2304 ** DENLSTRING -- convert newlines in a string to spaces
2305 **
2306 ** Parameters:
2307 ** s -- the input string
2308 ** strict -- if set, don't permit continuation lines.
2309 ** logattacks -- if set, log attempted attacks.
2310 **
2311 ** Returns:
2312 ** A pointer to a version of the string with newlines
2313 ** mapped to spaces. This should be copied.
2314 */
2315
2316 char *
denlstring(s,strict,logattacks)2317 denlstring(s, strict, logattacks)
2318 char *s;
2319 bool strict;
2320 bool logattacks;
2321 {
2322 register char *p;
2323 int l;
2324 static char *bp = NULL;
2325 static int bl = 0;
2326
2327 p = s;
2328 while ((p = strchr(p, '\n')) != NULL)
2329 if (strict || (*++p != ' ' && *p != '\t'))
2330 break;
2331 if (p == NULL)
2332 return s;
2333
2334 l = strlen(s) + 1;
2335 if (bl < l)
2336 {
2337 /* allocate more space */
2338 char *nbp = sm_pmalloc_x(l);
2339
2340 if (bp != NULL)
2341 sm_free(bp);
2342 bp = nbp;
2343 bl = l;
2344 }
2345 (void) sm_strlcpy(bp, s, l);
2346 for (p = bp; (p = strchr(p, '\n')) != NULL; )
2347 *p++ = ' ';
2348
2349 if (logattacks)
2350 {
2351 sm_syslog(LOG_NOTICE, CurEnv ? CurEnv->e_id : NULL,
2352 "POSSIBLE ATTACK from %.100s: newline in string \"%s\"",
2353 RealHostName == NULL ? "[UNKNOWN]" : RealHostName,
2354 shortenstring(bp, MAXSHORTSTR));
2355 }
2356
2357 return bp;
2358 }
2359
2360 /*
2361 ** STRREPLNONPRT -- replace "unprintable" characters in a string with subst
2362 **
2363 ** Parameters:
2364 ** s -- string to manipulate (in place)
2365 ** subst -- character to use as replacement
2366 **
2367 ** Returns:
2368 ** true iff string did not contain "unprintable" characters
2369 */
2370
2371 bool
strreplnonprt(s,c)2372 strreplnonprt(s, c)
2373 char *s;
2374 int c;
2375 {
2376 bool ok;
2377
2378 ok = true;
2379 if (s == NULL)
2380 return ok;
2381 while (*s != '\0')
2382 {
2383 if (!(isascii(*s) && isprint(*s)))
2384 {
2385 *s = c;
2386 ok = false;
2387 }
2388 ++s;
2389 }
2390 return ok;
2391 }
2392
2393 /*
2394 ** PATH_IS_DIR -- check to see if file exists and is a directory.
2395 **
2396 ** There are some additional checks for security violations in
2397 ** here. This routine is intended to be used for the host status
2398 ** support.
2399 **
2400 ** Parameters:
2401 ** pathname -- pathname to check for directory-ness.
2402 ** createflag -- if set, create directory if needed.
2403 **
2404 ** Returns:
2405 ** true -- if the indicated pathname is a directory
2406 ** false -- otherwise
2407 */
2408
2409 bool
path_is_dir(pathname,createflag)2410 path_is_dir(pathname, createflag)
2411 char *pathname;
2412 bool createflag;
2413 {
2414 struct stat statbuf;
2415
2416 #if HASLSTAT
2417 if (lstat(pathname, &statbuf) < 0)
2418 #else /* HASLSTAT */
2419 if (stat(pathname, &statbuf) < 0)
2420 #endif /* HASLSTAT */
2421 {
2422 if (errno != ENOENT || !createflag)
2423 return false;
2424 if (mkdir(pathname, 0755) < 0)
2425 return false;
2426 return true;
2427 }
2428 if (!S_ISDIR(statbuf.st_mode))
2429 {
2430 errno = ENOTDIR;
2431 return false;
2432 }
2433
2434 /* security: don't allow writable directories */
2435 if (bitset(S_IWGRP|S_IWOTH, statbuf.st_mode))
2436 {
2437 errno = EACCES;
2438 return false;
2439 }
2440 return true;
2441 }
2442
2443 /*
2444 ** PROC_LIST_ADD -- add process id to list of our children
2445 **
2446 ** Parameters:
2447 ** pid -- pid to add to list.
2448 ** task -- task of pid.
2449 ** type -- type of process.
2450 ** count -- number of processes.
2451 ** other -- other information for this type.
2452 **
2453 ** Returns:
2454 ** none
2455 **
2456 ** Side Effects:
2457 ** May increase CurChildren. May grow ProcList.
2458 */
2459
2460 typedef struct procs PROCS_T;
2461
2462 struct procs
2463 {
2464 pid_t proc_pid;
2465 char *proc_task;
2466 int proc_type;
2467 int proc_count;
2468 int proc_other;
2469 SOCKADDR proc_hostaddr;
2470 };
2471
2472 static PROCS_T *volatile ProcListVec = NULL;
2473 static int ProcListSize = 0;
2474
2475 void
proc_list_add(pid,task,type,count,other,hostaddr)2476 proc_list_add(pid, task, type, count, other, hostaddr)
2477 pid_t pid;
2478 char *task;
2479 int type;
2480 int count;
2481 int other;
2482 SOCKADDR *hostaddr;
2483 {
2484 int i;
2485
2486 for (i = 0; i < ProcListSize; i++)
2487 {
2488 if (ProcListVec[i].proc_pid == NO_PID)
2489 break;
2490 }
2491 if (i >= ProcListSize)
2492 {
2493 /* probe the existing vector to avoid growing infinitely */
2494 proc_list_probe();
2495
2496 /* now scan again */
2497 for (i = 0; i < ProcListSize; i++)
2498 {
2499 if (ProcListVec[i].proc_pid == NO_PID)
2500 break;
2501 }
2502 }
2503 if (i >= ProcListSize)
2504 {
2505 /* grow process list */
2506 int chldwasblocked;
2507 PROCS_T *npv;
2508
2509 SM_ASSERT(ProcListSize < INT_MAX - PROC_LIST_SEG);
2510 npv = (PROCS_T *) sm_pmalloc_x((sizeof(*npv)) *
2511 (ProcListSize + PROC_LIST_SEG));
2512
2513 /* Block SIGCHLD so reapchild() doesn't mess with us */
2514 chldwasblocked = sm_blocksignal(SIGCHLD);
2515 if (ProcListSize > 0)
2516 {
2517 memmove(npv, ProcListVec,
2518 ProcListSize * sizeof(PROCS_T));
2519 sm_free(ProcListVec);
2520 }
2521
2522 /* XXX just use memset() to initialize this part? */
2523 for (i = ProcListSize; i < ProcListSize + PROC_LIST_SEG; i++)
2524 {
2525 npv[i].proc_pid = NO_PID;
2526 npv[i].proc_task = NULL;
2527 npv[i].proc_type = PROC_NONE;
2528 }
2529 i = ProcListSize;
2530 ProcListSize += PROC_LIST_SEG;
2531 ProcListVec = npv;
2532 if (chldwasblocked == 0)
2533 (void) sm_releasesignal(SIGCHLD);
2534 }
2535 ProcListVec[i].proc_pid = pid;
2536 PSTRSET(ProcListVec[i].proc_task, task);
2537 ProcListVec[i].proc_type = type;
2538 ProcListVec[i].proc_count = count;
2539 ProcListVec[i].proc_other = other;
2540 if (hostaddr != NULL)
2541 ProcListVec[i].proc_hostaddr = *hostaddr;
2542 else
2543 memset(&ProcListVec[i].proc_hostaddr, 0,
2544 sizeof(ProcListVec[i].proc_hostaddr));
2545
2546 /* if process adding itself, it's not a child */
2547 if (pid != CurrentPid)
2548 {
2549 SM_ASSERT(CurChildren < INT_MAX);
2550 CurChildren++;
2551 }
2552 }
2553
2554 /*
2555 ** PROC_LIST_SET -- set pid task in process list
2556 **
2557 ** Parameters:
2558 ** pid -- pid to set
2559 ** task -- task of pid
2560 **
2561 ** Returns:
2562 ** none.
2563 */
2564
2565 void
proc_list_set(pid,task)2566 proc_list_set(pid, task)
2567 pid_t pid;
2568 char *task;
2569 {
2570 int i;
2571
2572 for (i = 0; i < ProcListSize; i++)
2573 {
2574 if (ProcListVec[i].proc_pid == pid)
2575 {
2576 PSTRSET(ProcListVec[i].proc_task, task);
2577 break;
2578 }
2579 }
2580 }
2581
2582 /*
2583 ** PROC_LIST_DROP -- drop pid from process list
2584 **
2585 ** Parameters:
2586 ** pid -- pid to drop
2587 ** st -- process status
2588 ** other -- storage for proc_other (return).
2589 **
2590 ** Returns:
2591 ** none.
2592 **
2593 ** Side Effects:
2594 ** May decrease CurChildren, CurRunners, or
2595 ** set RestartRequest or ShutdownRequest.
2596 **
2597 ** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD
2598 ** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
2599 ** DOING.
2600 */
2601
2602 void
proc_list_drop(pid,st,other)2603 proc_list_drop(pid, st, other)
2604 pid_t pid;
2605 int st;
2606 int *other;
2607 {
2608 int i;
2609 int type = PROC_NONE;
2610
2611 for (i = 0; i < ProcListSize; i++)
2612 {
2613 if (ProcListVec[i].proc_pid == pid)
2614 {
2615 ProcListVec[i].proc_pid = NO_PID;
2616 type = ProcListVec[i].proc_type;
2617 if (other != NULL)
2618 *other = ProcListVec[i].proc_other;
2619 if (CurChildren > 0)
2620 CurChildren--;
2621 break;
2622 }
2623 }
2624
2625
2626 if (type == PROC_CONTROL && WIFEXITED(st))
2627 {
2628 /* if so, see if we need to restart or shutdown */
2629 if (WEXITSTATUS(st) == EX_RESTART)
2630 RestartRequest = "control socket";
2631 else if (WEXITSTATUS(st) == EX_SHUTDOWN)
2632 ShutdownRequest = "control socket";
2633 }
2634 else if (type == PROC_QUEUE_CHILD && !WIFSTOPPED(st) &&
2635 ProcListVec[i].proc_other > -1)
2636 {
2637 /* restart this persistent runner */
2638 mark_work_group_restart(ProcListVec[i].proc_other, st);
2639 }
2640 else if (type == PROC_QUEUE)
2641 CurRunners -= ProcListVec[i].proc_count;
2642 }
2643
2644 /*
2645 ** PROC_LIST_CLEAR -- clear the process list
2646 **
2647 ** Parameters:
2648 ** none.
2649 **
2650 ** Returns:
2651 ** none.
2652 **
2653 ** Side Effects:
2654 ** Sets CurChildren to zero.
2655 */
2656
2657 void
proc_list_clear()2658 proc_list_clear()
2659 {
2660 int i;
2661
2662 /* start from 1 since 0 is the daemon itself */
2663 for (i = 1; i < ProcListSize; i++)
2664 ProcListVec[i].proc_pid = NO_PID;
2665 CurChildren = 0;
2666 }
2667
2668 /*
2669 ** PROC_LIST_PROBE -- probe processes in the list to see if they still exist
2670 **
2671 ** Parameters:
2672 ** none
2673 **
2674 ** Returns:
2675 ** none
2676 **
2677 ** Side Effects:
2678 ** May decrease CurChildren.
2679 */
2680
2681 void
proc_list_probe()2682 proc_list_probe()
2683 {
2684 int i, children;
2685 int chldwasblocked;
2686 pid_t pid;
2687
2688 children = 0;
2689 chldwasblocked = sm_blocksignal(SIGCHLD);
2690
2691 /* start from 1 since 0 is the daemon itself */
2692 for (i = 1; i < ProcListSize; i++)
2693 {
2694 pid = ProcListVec[i].proc_pid;
2695 if (pid == NO_PID || pid == CurrentPid)
2696 continue;
2697 if (kill(pid, 0) < 0)
2698 {
2699 if (LogLevel > 3)
2700 sm_syslog(LOG_DEBUG, CurEnv->e_id,
2701 "proc_list_probe: lost pid %d",
2702 (int) ProcListVec[i].proc_pid);
2703 ProcListVec[i].proc_pid = NO_PID;
2704 SM_FREE_CLR(ProcListVec[i].proc_task);
2705 CurChildren--;
2706 }
2707 else
2708 {
2709 ++children;
2710 }
2711 }
2712 if (CurChildren < 0)
2713 CurChildren = 0;
2714 if (chldwasblocked == 0)
2715 (void) sm_releasesignal(SIGCHLD);
2716 if (LogLevel > 10 && children != CurChildren && CurrentPid == DaemonPid)
2717 {
2718 sm_syslog(LOG_ERR, NOQID,
2719 "proc_list_probe: found %d children, expected %d",
2720 children, CurChildren);
2721 }
2722 }
2723
2724 /*
2725 ** PROC_LIST_DISPLAY -- display the process list
2726 **
2727 ** Parameters:
2728 ** out -- output file pointer
2729 ** prefix -- string to output in front of each line.
2730 **
2731 ** Returns:
2732 ** none.
2733 */
2734
2735 void
proc_list_display(out,prefix)2736 proc_list_display(out, prefix)
2737 SM_FILE_T *out;
2738 char *prefix;
2739 {
2740 int i;
2741
2742 for (i = 0; i < ProcListSize; i++)
2743 {
2744 if (ProcListVec[i].proc_pid == NO_PID)
2745 continue;
2746
2747 (void) sm_io_fprintf(out, SM_TIME_DEFAULT, "%s%d %s%s\n",
2748 prefix,
2749 (int) ProcListVec[i].proc_pid,
2750 ProcListVec[i].proc_task != NULL ?
2751 ProcListVec[i].proc_task : "(unknown)",
2752 (OpMode == MD_SMTP ||
2753 OpMode == MD_DAEMON ||
2754 OpMode == MD_ARPAFTP) ? "\r" : "");
2755 }
2756 }
2757
2758 /*
2759 ** PROC_LIST_SIGNAL -- send a signal to a type of process in the list
2760 **
2761 ** Parameters:
2762 ** type -- type of process to signal
2763 ** signal -- the type of signal to send
2764 **
2765 ** Results:
2766 ** none.
2767 **
2768 ** NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER. DO NOT ADD
2769 ** ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
2770 ** DOING.
2771 */
2772
2773 void
proc_list_signal(type,signal)2774 proc_list_signal(type, signal)
2775 int type;
2776 int signal;
2777 {
2778 int chldwasblocked;
2779 int alrmwasblocked;
2780 int i;
2781 pid_t mypid = getpid();
2782
2783 /* block these signals so that we may signal cleanly */
2784 chldwasblocked = sm_blocksignal(SIGCHLD);
2785 alrmwasblocked = sm_blocksignal(SIGALRM);
2786
2787 /* Find all processes of type and send signal */
2788 for (i = 0; i < ProcListSize; i++)
2789 {
2790 if (ProcListVec[i].proc_pid == NO_PID ||
2791 ProcListVec[i].proc_pid == mypid)
2792 continue;
2793 if (ProcListVec[i].proc_type != type)
2794 continue;
2795 (void) kill(ProcListVec[i].proc_pid, signal);
2796 }
2797
2798 /* restore the signals */
2799 if (alrmwasblocked == 0)
2800 (void) sm_releasesignal(SIGALRM);
2801 if (chldwasblocked == 0)
2802 (void) sm_releasesignal(SIGCHLD);
2803 }
2804
2805 /*
2806 ** COUNT_OPEN_CONNECTIONS
2807 **
2808 ** Parameters:
2809 ** hostaddr - ClientAddress
2810 **
2811 ** Returns:
2812 ** the number of open connections for this client
2813 **
2814 */
2815
2816 int
count_open_connections(hostaddr)2817 count_open_connections(hostaddr)
2818 SOCKADDR *hostaddr;
2819 {
2820 int i, n;
2821
2822 if (hostaddr == NULL)
2823 return 0;
2824
2825 /*
2826 ** This code gets called before proc_list_add() gets called,
2827 ** so we (the daemon child for this connection) have not yet
2828 ** counted ourselves. Hence initialize the counter to 1
2829 ** instead of 0 to compensate.
2830 */
2831
2832 n = 1;
2833 for (i = 0; i < ProcListSize; i++)
2834 {
2835 if (ProcListVec[i].proc_pid == NO_PID)
2836 continue;
2837 if (hostaddr->sa.sa_family !=
2838 ProcListVec[i].proc_hostaddr.sa.sa_family)
2839 continue;
2840 #if NETINET
2841 if (hostaddr->sa.sa_family == AF_INET &&
2842 (hostaddr->sin.sin_addr.s_addr ==
2843 ProcListVec[i].proc_hostaddr.sin.sin_addr.s_addr))
2844 n++;
2845 #endif /* NETINET */
2846 #if NETINET6
2847 if (hostaddr->sa.sa_family == AF_INET6 &&
2848 IN6_ARE_ADDR_EQUAL(&(hostaddr->sin6.sin6_addr),
2849 &(ProcListVec[i].proc_hostaddr.sin6.sin6_addr)))
2850 n++;
2851 #endif /* NETINET6 */
2852 }
2853 return n;
2854 }
2855