1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* Functions for reading spool files. When compiling for a utility (eximon),
9 not all are needed, and some functionality can be cut out. */
16 #ifndef COMPILE_UTILITY
17 /*************************************************
18 * Open and lock data file *
19 *************************************************/
21 /* The data file is the one that is used for locking, because the header file
22 can get replaced during delivery because of header rewriting. The file has
23 to opened with write access so that we can get an exclusive lock, but in
24 fact it won't be written to. Just in case there's a major disaster (e.g.
25 overwriting some other file descriptor with the value of this one), open it
28 As called by deliver_message() (at least) we are operating as root.
30 Argument: the id of the message
31 Returns: fd if file successfully opened and locked, else -1
33 Side effect: message_subdir is set for the (possibly split) spool directory
37 spool_open_datafile(uschar *id)
44 /* If split_spool_directory is set, first look for the file in the appropriate
45 sub-directory of the input directory. If it is not found there, try the input
46 directory itself, to pick up leftovers from before the splitting. If split_
47 spool_directory is not set, first look in the main input directory. If it is
48 not found there, try the split sub-directory, in case it is left over from a
51 for (i = 0; i < 2; i++)
56 message_subdir[0] = split_spool_directory == i ? '\0' : id[5];
57 fname = spool_fname(US"input", message_subdir, id, US"-D");
58 DEBUG(D_deliver) debug_printf("Trying spool file %s\n", fname);
60 if ((fd = Uopen(fname,
64 O_RDWR | O_APPEND, 0)) >= 0)
71 log_write(0, LOG_MAIN, "Spool%s%s file %s-D not found",
72 *queue_name ? US" Q=" : US"",
73 *queue_name ? queue_name : US"",
77 log_write(0, LOG_MAIN, "Spool error for %s: %s", fname, strerror(errno));
82 /* File is open and message_subdir is set. Set the close-on-exec flag, and lock
83 the file. We lock only the first line of the file (containing the message ID)
84 because this apparently is needed for running Exim under Cygwin. If the entire
85 file is locked in one process, a sub-process cannot access it, even when passed
86 an open file descriptor (at least, I think that's the Cygwin story). On real
87 Unix systems it doesn't make any difference as long as Exim is consistent in
91 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
94 lock_data.l_type = F_WRLCK;
95 lock_data.l_whence = SEEK_SET;
96 lock_data.l_start = 0;
97 lock_data.l_len = SPOOL_DATA_START_OFFSET;
99 if (fcntl(fd, F_SETLK, &lock_data) < 0)
101 log_write(L_skip_delivery,
103 "Spool file is locked (another process is handling this message)");
109 /* Get the size of the data; don't include the leading filename line
110 in the count, but add one for the newline before the data. */
112 if (fstat(fd, &statbuf) == 0)
114 message_body_size = statbuf.st_size - SPOOL_DATA_START_OFFSET;
115 message_size = message_body_size + 1;
120 #endif /* COMPILE_UTILITY */
124 /*************************************************
125 * Read non-recipients tree from spool file *
126 *************************************************/
128 /* The tree of non-recipients is written to the spool file in a form that
129 makes it easy to read back into a tree. The format is as follows:
131 . Each node is preceded by two letter(Y/N) indicating whether it has left
132 or right children. There's one space after the two flags, before the name.
134 . The left subtree (if any) then follows, then the right subtree (if any).
136 This function is entered with the next input line in the buffer. Note we must
137 save the right flag before recursing with the same buffer.
139 Once the tree is read, we re-construct the balance fields by scanning the tree.
140 I forgot to write them out originally, and the compatible fix is to do it this
141 way. This initial local recursing function does the necessary.
146 Returns: maximum depth below the node, including the node itself
150 count_below(tree_node *node)
153 if (node == NULL) return 0;
154 nleft = count_below(node->left);
155 nright = count_below(node->right);
156 node->balance = (nleft > nright)? 1 : ((nright > nleft)? 2 : 0);
157 return 1 + ((nleft > nright)? nleft : nright);
160 /* This is the real function...
163 connect pointer to the root of the tree
164 f FILE to read data from
165 buffer contains next input line; further lines read into it
166 buffer_size size of the buffer
168 Returns: FALSE on format error
172 read_nonrecipients_tree(tree_node **connect, FILE *f, uschar *buffer,
176 int n = Ustrlen(buffer);
177 BOOL right = buffer[1] == 'Y';
179 if (n < 5) return FALSE; /* malformed line */
180 buffer[n-1] = 0; /* Remove \n */
181 node = store_get(sizeof(tree_node) + n - 3);
183 Ustrcpy(node->name, buffer + 3);
184 node->data.ptr = NULL;
186 if (buffer[0] == 'Y')
188 if (Ufgets(buffer, buffer_size, f) == NULL ||
189 !read_nonrecipients_tree(&node->left, f, buffer, buffer_size))
192 else node->left = NULL;
196 if (Ufgets(buffer, buffer_size, f) == NULL ||
197 !read_nonrecipients_tree(&node->right, f, buffer, buffer_size))
200 else node->right = NULL;
202 (void) count_below(*connect);
209 /* Reset all the global variables to their default values. However, there is
210 one exception. DO NOT change the default value of dont_deliver, because it may
211 be forced by an external setting. */
214 spool_clear_header_globals(void)
216 acl_var_c = acl_var_m = NULL;
217 authenticated_id = NULL;
218 authenticated_sender = NULL;
219 allow_unqualified_recipient = FALSE;
220 allow_unqualified_sender = FALSE;
223 deliver_firsttime = FALSE;
224 deliver_freeze = FALSE;
225 deliver_frozen_at = 0;
226 deliver_manual_thaw = FALSE;
227 /* dont_deliver must NOT be reset */
228 header_list = header_last = NULL;
229 host_lookup_deferred = FALSE;
230 host_lookup_failed = FALSE;
231 interface_address = NULL;
233 local_error_message = FALSE;
234 #ifdef HAVE_LOCAL_SCAN
235 local_scan_data = NULL;
237 max_received_linelength = 0;
238 message_linecount = 0;
239 received_protocol = NULL;
241 recipients_list = NULL;
242 sender_address = NULL;
243 sender_fullhost = NULL;
244 sender_helo_name = NULL;
245 sender_host_address = NULL;
246 sender_host_name = NULL;
247 sender_host_port = 0;
248 sender_host_authenticated = NULL;
250 sender_local = FALSE;
251 sender_set_untrusted = FALSE;
252 smtp_active_hostname = primary_hostname;
253 #ifndef COMPILE_UTILITY
254 spool_file_wireformat = FALSE;
256 tree_nonrecipients = NULL;
258 #ifdef EXPERIMENTAL_BRIGHTMAIL
265 dkim_disable_verify = FALSE;
266 dkim_collect_input = FALSE;
270 tls_in.certificate_verified = FALSE;
272 tls_in.dane_verified = FALSE;
274 tls_in.cipher = NULL;
275 # ifndef COMPILE_UTILITY /* tls support fns not built in */
276 tls_free_cert(&tls_in.ourcert);
277 tls_free_cert(&tls_in.peercert);
279 tls_in.peerdn = NULL;
281 tls_in.ocsp = OCSP_NOT_REQ;
284 #ifdef WITH_CONTENT_SCAN
287 spam_score_int = NULL;
290 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
291 message_smtputf8 = FALSE;
292 message_utf8_downconvert = 0;
300 /*************************************************
301 * Read spool header file *
302 *************************************************/
304 /* This function reads a spool header file and places the data into the
305 appropriate global variables. The header portion is always read, but header
306 structures are built only if read_headers is set true. It isn't, for example,
307 while generating -bp output.
309 It may be possible for blocks of nulls (binary zeroes) to get written on the
310 end of a file if there is a system crash during writing. It was observed on an
311 earlier version of Exim that omitted to fsync() the files - this is thought to
312 have been the cause of that incident, but in any case, this code must be robust
313 against such an event, and if such a file is encountered, it must be treated as
316 As called from deliver_message() (at least) we are running as root.
319 name name of the header file, including the -H
320 read_headers TRUE if in-store header structures are to be built
321 subdir_set TRUE is message_subdir is already set
323 Returns: spool_read_OK success
324 spool_read_notopen open failed
325 spool_read_enverror error in the envelope portion
326 spool_read_hdrerror error in the header portion
330 spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
336 BOOL inheader = FALSE;
339 /* Reset all the global variables to their default values. However, there is
340 one exception. DO NOT change the default value of dont_deliver, because it may
341 be forced by an external setting. */
343 spool_clear_header_globals();
345 /* Generate the full name and open the file. If message_subdir is already
346 set, just look in the given directory. Otherwise, look in both the split
347 and unsplit directories, as for the data file above. */
349 for (n = 0; n < 2; n++)
352 message_subdir[0] = split_spool_directory == (n == 0) ? name[5] : 0;
354 if ((f = Ufopen(spool_fname(US"input", message_subdir, name, US""), "rb")))
356 if (n != 0 || subdir_set || errno != ENOENT)
357 return spool_read_notopen;
362 #ifndef COMPILE_UTILITY
363 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
364 #endif /* COMPILE_UTILITY */
366 /* The first line of a spool file contains the message id followed by -H (i.e.
367 the file name), in order to make the file self-identifying. */
369 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
370 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
371 Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
372 goto SPOOL_FORMAT_ERROR;
374 /* The next three lines in the header file are in a fixed format. The first
375 contains the login, uid, and gid of the user who caused the file to be written.
376 There are known cases where a negative gid is used, so we allow for both
377 negative uids and gids. The second contains the mail address of the message's
378 sender, enclosed in <>. The third contains the time the message was received,
379 and the number of warning messages for delivery delays that have been sent. */
381 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
383 p = big_buffer + Ustrlen(big_buffer);
384 while (p > big_buffer && isspace(p[-1])) p--;
386 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
387 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
389 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
391 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
392 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
394 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
397 originator_login = string_copy(big_buffer);
398 originator_uid = (uid_t)uid;
399 originator_gid = (gid_t)gid;
402 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
403 n = Ustrlen(big_buffer);
404 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
405 goto SPOOL_FORMAT_ERROR;
407 sender_address = store_get(n-2);
408 Ustrncpy(sender_address, big_buffer+1, n-3);
409 sender_address[n-3] = 0;
412 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
413 if (sscanf(CS big_buffer, TIME_T_FMT " %d", &received_time.tv_sec, &warning_count) != 2)
414 goto SPOOL_FORMAT_ERROR;
415 received_time.tv_usec = 0;
417 message_age = time(NULL) - received_time.tv_sec;
419 #ifndef COMPILE_UTILITY
420 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
421 originator_login, (long int)originator_uid, (long int)originator_gid,
423 #endif /* COMPILE_UTILITY */
425 /* Now there may be a number of optional lines, each starting with "-". If you
426 add a new setting here, make sure you set the default above.
428 Because there are now quite a number of different possibilities, we use a
429 switch on the first character to avoid too many failing tests. Thanks to Nico
430 Erfurth for the patch that implemented this. I have made it even more efficient
431 by not re-scanning the first two characters.
433 To allow new versions of Exim that add additional flags to interwork with older
434 versions that do not understand them, just ignore any lines starting with "-"
435 that we don't recognize. Otherwise it wouldn't be possible to back off a new
436 version that left new-style flags written on the spool. */
442 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
443 if (big_buffer[0] != '-') break;
444 while ( (len = Ustrlen(big_buffer)) == big_buffer_size-1
445 && big_buffer[len-1] != '\n'
447 { /* buffer not big enough for line; certs make this possible */
449 if (big_buffer_size >= BIG_BUFFER_SIZE*4) goto SPOOL_READ_ERROR;
450 buf = store_get_perm(big_buffer_size *= 2);
451 memcpy(buf, big_buffer, --len);
453 if (Ufgets(big_buffer+len, big_buffer_size-len, f) == NULL)
454 goto SPOOL_READ_ERROR;
456 big_buffer[len-1] = 0;
458 switch(big_buffer[1])
462 /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
463 variable, because Exim allows any number of them, with arbitrary names.
464 The line in the spool file is "-acl[cm] <name> <length>". The name excludes
467 if (Ustrncmp(p, "clc ", 4) == 0 ||
468 Ustrncmp(p, "clm ", 4) == 0)
470 uschar *name, *endptr;
473 endptr = Ustrchr(big_buffer + 6, ' ');
474 if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
475 name = string_sprintf("%c%.*s", big_buffer[4],
476 (int)(endptr - big_buffer - 6), big_buffer + 6);
477 if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
478 node = acl_var_create(name);
479 node->data.ptr = store_get(count + 1);
480 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
481 ((uschar*)node->data.ptr)[count] = 0;
484 else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
485 allow_unqualified_recipient = TRUE;
486 else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
487 allow_unqualified_sender = TRUE;
489 else if (Ustrncmp(p, "uth_id", 6) == 0)
490 authenticated_id = string_copy(big_buffer + 9);
491 else if (Ustrncmp(p, "uth_sender", 10) == 0)
492 authenticated_sender = string_copy(big_buffer + 13);
493 else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
494 smtp_active_hostname = string_copy(big_buffer + 17);
496 /* For long-term backward compatibility, we recognize "-acl", which was
497 used before the number of ACL variables changed from 10 to 20. This was
498 before the subsequent change to an arbitrary number of named variables.
499 This code is retained so that upgrades from very old versions can still
500 handle old-format spool files. The value given after "-acl" is a number
501 that is 0-9 for connection variables, and 10-19 for message variables. */
503 else if (Ustrncmp(p, "cl ", 3) == 0)
505 unsigned index, count;
506 uschar name[20]; /* Need plenty of space for %u format */
508 if ( sscanf(CS big_buffer + 5, "%u %u", &index, &count) != 2
510 || count > 16384 /* arbitrary limit on variable size */
512 goto SPOOL_FORMAT_ERROR;
514 (void) string_format(name, sizeof(name), "%c%u", 'c', index);
516 (void) string_format(name, sizeof(name), "%c%u", 'm', index - 10);
517 node = acl_var_create(name);
518 node->data.ptr = store_get(count + 1);
519 /* We sanity-checked the count, so disable the Coverity error */
520 /* coverity[tainted_data] */
521 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
522 (US node->data.ptr)[count] = '\0';
527 if (Ustrncmp(p, "ody_linecount", 13) == 0)
528 body_linecount = Uatoi(big_buffer + 15);
529 else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
530 body_zerocount = Uatoi(big_buffer + 15);
531 #ifdef EXPERIMENTAL_BRIGHTMAIL
532 else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
533 bmi_verdicts = string_copy(big_buffer + 14);
538 if (Ustrcmp(p, "eliver_firsttime") == 0)
539 deliver_firsttime = TRUE;
540 /* Check if the dsn flags have been set in the header file */
541 else if (Ustrncmp(p, "sn_ret", 6) == 0)
542 dsn_ret= atoi(CS big_buffer + 8);
543 else if (Ustrncmp(p, "sn_envid", 8) == 0)
544 dsn_envid = string_copy(big_buffer + 11);
548 if (Ustrncmp(p, "rozen", 5) == 0)
550 deliver_freeze = TRUE;
551 if (sscanf(CS big_buffer+7, TIME_T_FMT, &deliver_frozen_at) != 1)
552 goto SPOOL_READ_ERROR;
557 if (Ustrcmp(p, "ost_lookup_deferred") == 0)
558 host_lookup_deferred = TRUE;
559 else if (Ustrcmp(p, "ost_lookup_failed") == 0)
560 host_lookup_failed = TRUE;
561 else if (Ustrncmp(p, "ost_auth", 8) == 0)
562 sender_host_authenticated = string_copy(big_buffer + 11);
563 else if (Ustrncmp(p, "ost_name", 8) == 0)
564 sender_host_name = string_copy(big_buffer + 11);
565 else if (Ustrncmp(p, "elo_name", 8) == 0)
566 sender_helo_name = string_copy(big_buffer + 11);
568 /* We now record the port number after the address, separated by a
569 dot. For compatibility during upgrading, do nothing if there
570 isn't a value (it gets left at zero). */
572 else if (Ustrncmp(p, "ost_address", 11) == 0)
574 sender_host_port = host_address_extract_port(big_buffer + 14);
575 sender_host_address = string_copy(big_buffer + 14);
580 if (Ustrncmp(p, "nterface_address", 16) == 0)
582 interface_port = host_address_extract_port(big_buffer + 19);
583 interface_address = string_copy(big_buffer + 19);
585 else if (Ustrncmp(p, "dent", 4) == 0)
586 sender_ident = string_copy(big_buffer + 7);
590 if (Ustrcmp(p, "ocal") == 0)
592 else if (Ustrcmp(big_buffer, "-localerror") == 0)
593 local_error_message = TRUE;
594 #ifdef HAVE_LOCAL_SCAN
595 else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
596 local_scan_data = string_copy(big_buffer + 12);
601 if (Ustrcmp(p, "anual_thaw") == 0) deliver_manual_thaw = TRUE;
602 else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
603 max_received_linelength = Uatoi(big_buffer + 24);
607 if (*p == 0) dont_deliver = TRUE; /* -N */
611 if (Ustrncmp(p, "eceived_protocol", 16) == 0)
612 received_protocol = string_copy(big_buffer + 19);
613 else if (Ustrncmp(p, "eceived_time_usec", 17) == 0)
616 if (sscanf(CS big_buffer + 21, "%u", &usec) == 1)
617 received_time.tv_usec = usec;
622 if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
623 sender_set_untrusted = TRUE;
624 #ifdef WITH_CONTENT_SCAN
625 else if (Ustrncmp(p, "pam_bar ", 8) == 0)
626 spam_bar = string_copy(big_buffer + 10);
627 else if (Ustrncmp(p, "pam_score ", 10) == 0)
628 spam_score = string_copy(big_buffer + 12);
629 else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
630 spam_score_int = string_copy(big_buffer + 16);
632 #ifndef COMPILE_UTILITY
633 else if (Ustrncmp(p, "pool_file_wireformat", 20) == 0)
634 spool_file_wireformat = TRUE;
636 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
637 else if (Ustrncmp(p, "mtputf8", 7) == 0)
638 message_smtputf8 = TRUE;
644 if (Ustrncmp(p, "ls_certificate_verified", 23) == 0)
645 tls_in.certificate_verified = TRUE;
646 else if (Ustrncmp(p, "ls_cipher", 9) == 0)
647 tls_in.cipher = string_copy(big_buffer + 12);
648 # ifndef COMPILE_UTILITY /* tls support fns not built in */
649 else if (Ustrncmp(p, "ls_ourcert", 10) == 0)
650 (void) tls_import_cert(big_buffer + 13, &tls_in.ourcert);
651 else if (Ustrncmp(p, "ls_peercert", 11) == 0)
652 (void) tls_import_cert(big_buffer + 14, &tls_in.peercert);
654 else if (Ustrncmp(p, "ls_peerdn", 9) == 0)
655 tls_in.peerdn = string_unprinting(string_copy(big_buffer + 12));
656 else if (Ustrncmp(p, "ls_sni", 6) == 0)
657 tls_in.sni = string_unprinting(string_copy(big_buffer + 9));
658 else if (Ustrncmp(p, "ls_ocsp", 7) == 0)
659 tls_in.ocsp = big_buffer[10] - '0';
663 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
665 if (Ustrncmp(p, "tf8_downcvt", 11) == 0)
666 message_utf8_downconvert = 1;
667 else if (Ustrncmp(p, "tf8_optdowncvt", 15) == 0)
668 message_utf8_downconvert = -1;
672 default: /* Present because some compilers complain if all */
673 break; /* possibilities are not covered. */
677 /* Build sender_fullhost if required */
679 #ifndef COMPILE_UTILITY
680 host_build_sender_fullhost();
681 #endif /* COMPILE_UTILITY */
683 #ifndef COMPILE_UTILITY
685 debug_printf("sender_local=%d ident=%s\n", sender_local,
686 (sender_ident == NULL)? US"unset" : sender_ident);
687 #endif /* COMPILE_UTILITY */
689 /* We now have the tree of addresses NOT to deliver to, or a line
690 containing "XX", indicating no tree. */
692 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
693 !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
694 goto SPOOL_FORMAT_ERROR;
696 #ifndef COMPILE_UTILITY
699 debug_printf("Non-recipients:\n");
700 debug_print_tree(tree_nonrecipients);
702 #endif /* COMPILE_UTILITY */
704 /* After reading the tree, the next line has not yet been read into the
705 buffer. It contains the count of recipients which follow on separate lines.
706 Apply an arbitrary sanity check.*/
708 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
709 if (sscanf(CS big_buffer, "%d", &rcount) != 1 || rcount > 16384)
710 goto SPOOL_FORMAT_ERROR;
712 #ifndef COMPILE_UTILITY
713 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
714 #endif /* COMPILE_UTILITY */
716 recipients_list_max = rcount;
717 recipients_list = store_get(rcount * sizeof(recipient_item));
719 /* We sanitised the count and know we have enough memory, so disable
720 the Coverity error on recipients_count */
721 /* coverity[tainted_data] */
723 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
728 uschar *orcpt = NULL;
729 uschar *errors_to = NULL;
732 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
733 nn = Ustrlen(big_buffer);
734 if (nn < 2) goto SPOOL_FORMAT_ERROR;
736 /* Remove the newline; this terminates the address if there is no additional
739 p = big_buffer + nn - 1;
742 /* Look back from the end of the line for digits and special terminators.
743 Since an address must end with a domain, we can tell that extra data is
744 present by the presence of the terminator, which is always some character
745 that cannot exist in a domain. (If I'd thought of the need for additional
746 data early on, I'd have put it at the start, with the address at the end. As
747 it is, we have to operate backwards. Addresses are permitted to contain
750 This code has to cope with various versions of this data that have evolved
751 over time. In all cases, the line might just contain an address, with no
752 additional data. Otherwise, the possibilities are as follows:
754 Exim 3 type: <address><space><digits>,<digits>,<digits>
756 The second set of digits is the parent number for one_time addresses. The
757 other values were remnants of earlier experiments that were abandoned.
759 Exim 4 first type: <address><space><digits>
761 The digits are the parent number for one_time addresses.
763 Exim 4 new type: <address><space><data>#<type bits>
765 The type bits indicate what the contents of the data are.
767 Bit 01 indicates that, reading from right to left, the data
768 ends with <errors_to address><space><len>,<pno> where pno is
769 the parent number for one_time addresses, and len is the length
770 of the errors_to address (zero meaning none).
772 Bit 02 indicates that, again reading from right to left, the data continues
773 with orcpt len(orcpt),dsn_flags
776 while (isdigit(*p)) p--;
778 /* Handle Exim 3 spool files */
783 while (isdigit(*(--p)) || *p == ',');
787 (void)sscanf(CS p, "%d,%d", &dummy, &pno);
791 /* Handle early Exim 4 spool files */
796 (void)sscanf(CS p, "%d", &pno);
799 /* Handle current format Exim 4 spool files */
805 #if !defined (COMPILE_UTILITY)
806 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim 4 standard format spoolfile\n");
809 (void)sscanf(CS p+1, "%d", &flags);
811 if ((flags & 0x01) != 0) /* one_time data exists */
814 while (isdigit(*(--p)) || *p == ',' || *p == '-');
815 (void)sscanf(CS p+1, "%d,%d", &len, &pno);
820 errors_to = string_copy(p);
824 *(--p) = 0; /* Terminate address */
825 if ((flags & 0x02) != 0) /* one_time data exists */
828 while (isdigit(*(--p)) || *p == ',' || *p == '-');
829 (void)sscanf(CS p+1, "%d,%d", &len, &dsn_flags);
834 orcpt = string_copy(p);
838 *(--p) = 0; /* Terminate address */
840 #if !defined(COMPILE_UTILITY)
842 { DEBUG(D_deliver) debug_printf("**** SPOOL_IN - No additional fields\n"); }
844 if ((orcpt != NULL) || (dsn_flags != 0))
846 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| orcpt: |%s| dsn_flags: %d\n",
847 big_buffer, orcpt, dsn_flags);
849 if (errors_to != NULL)
851 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| errorsto: |%s|\n",
852 big_buffer, errors_to);
856 recipients_list[recipients_count].address = string_copy(big_buffer);
857 recipients_list[recipients_count].pno = pno;
858 recipients_list[recipients_count].errors_to = errors_to;
859 recipients_list[recipients_count].orcpt = orcpt;
860 recipients_list[recipients_count].dsn_flags = dsn_flags;
863 /* The remainder of the spool header file contains the headers for the message,
864 separated off from the previous data by a blank line. Each header is preceded
865 by a count of its length and either a certain letter (for various identified
866 headers), space (for a miscellaneous live header) or an asterisk (for a header
867 that has been rewritten). Count the Received: headers. We read the headers
868 always, in order to check on the format of the file, but only create a header
869 list if requested to do so. */
872 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
873 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
875 while ((n = fgetc(f)) != EOF)
881 if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
882 if(ungetc(n, f) == EOF || fscanf(f, "%d%c ", &n, flag) == EOF)
883 goto SPOOL_READ_ERROR;
884 if (flag[0] != '*') message_size += n; /* Omit non-transmitted headers */
888 h = store_get(sizeof(header_line));
892 h->text = store_get(n+1);
894 if (h->type == htype_received) received_count++;
896 if (header_list == NULL) header_list = h;
897 else header_last->next = h;
900 for (i = 0; i < n; i++)
903 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
904 if (c == '\n' && h->type != htype_old) message_linecount++;
910 /* Not requiring header data, just skip through the bytes */
912 else for (i = 0; i < n; i++)
915 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
919 /* We have successfully read the data in the header file. Update the message
920 line count by adding the body linecount to the header linecount. Close the file
921 and give a positive response. */
923 #ifndef COMPILE_UTILITY
924 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
925 body_linecount, message_linecount);
926 #endif /* COMPILE_UTILITY */
928 message_linecount += body_linecount;
931 return spool_read_OK;
934 /* There was an error reading the spool or there was missing data,
935 or there was a format error. A "read error" with no errno means an
936 unexpected EOF, which we treat as a format error. */
943 #ifndef COMPILE_UTILITY
944 DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
945 #endif /* COMPILE_UTILITY */
949 return inheader? spool_read_hdrerror : spool_read_enverror;
954 #ifndef COMPILE_UTILITY
955 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
956 #endif /* COMPILE_UTILITY */
959 errno = ERRNO_SPOOLFORMAT;
960 return inheader? spool_read_hdrerror : spool_read_enverror;
965 /* End of spool_in.c */