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 local_scan_data = NULL;
235 max_received_linelength = 0;
236 message_linecount = 0;
237 received_protocol = NULL;
239 recipients_list = NULL;
240 sender_address = NULL;
241 sender_fullhost = NULL;
242 sender_helo_name = NULL;
243 sender_host_address = NULL;
244 sender_host_name = NULL;
245 sender_host_port = 0;
246 sender_host_authenticated = NULL;
248 sender_local = FALSE;
249 sender_set_untrusted = FALSE;
250 smtp_active_hostname = primary_hostname;
251 #ifndef COMPILE_UTILITY
252 spool_file_wireformat = FALSE;
254 tree_nonrecipients = NULL;
256 #ifdef EXPERIMENTAL_BRIGHTMAIL
263 dkim_disable_verify = FALSE;
264 dkim_collect_input = FALSE;
268 tls_in.certificate_verified = FALSE;
270 tls_in.dane_verified = FALSE;
272 tls_in.cipher = NULL;
273 # ifndef COMPILE_UTILITY /* tls support fns not built in */
274 tls_free_cert(&tls_in.ourcert);
275 tls_free_cert(&tls_in.peercert);
277 tls_in.peerdn = NULL;
279 tls_in.ocsp = OCSP_NOT_REQ;
282 #ifdef WITH_CONTENT_SCAN
285 spam_score_int = NULL;
288 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
289 message_smtputf8 = FALSE;
290 message_utf8_downconvert = 0;
298 /*************************************************
299 * Read spool header file *
300 *************************************************/
302 /* This function reads a spool header file and places the data into the
303 appropriate global variables. The header portion is always read, but header
304 structures are built only if read_headers is set true. It isn't, for example,
305 while generating -bp output.
307 It may be possible for blocks of nulls (binary zeroes) to get written on the
308 end of a file if there is a system crash during writing. It was observed on an
309 earlier version of Exim that omitted to fsync() the files - this is thought to
310 have been the cause of that incident, but in any case, this code must be robust
311 against such an event, and if such a file is encountered, it must be treated as
314 As called from deliver_message() (at least) we are running as root.
317 name name of the header file, including the -H
318 read_headers TRUE if in-store header structures are to be built
319 subdir_set TRUE is message_subdir is already set
321 Returns: spool_read_OK success
322 spool_read_notopen open failed
323 spool_read_enverror error in the envelope portion
324 spool_read_hdrerror error in the header portion
328 spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
334 BOOL inheader = FALSE;
337 /* Reset all the global variables to their default values. However, there is
338 one exception. DO NOT change the default value of dont_deliver, because it may
339 be forced by an external setting. */
341 spool_clear_header_globals();
343 /* Generate the full name and open the file. If message_subdir is already
344 set, just look in the given directory. Otherwise, look in both the split
345 and unsplit directories, as for the data file above. */
347 for (n = 0; n < 2; n++)
350 message_subdir[0] = split_spool_directory == (n == 0) ? name[5] : 0;
352 if ((f = Ufopen(spool_fname(US"input", message_subdir, name, US""), "rb")))
354 if (n != 0 || subdir_set || errno != ENOENT)
355 return spool_read_notopen;
360 #ifndef COMPILE_UTILITY
361 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
362 #endif /* COMPILE_UTILITY */
364 /* The first line of a spool file contains the message id followed by -H (i.e.
365 the file name), in order to make the file self-identifying. */
367 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
368 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
369 Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
370 goto SPOOL_FORMAT_ERROR;
372 /* The next three lines in the header file are in a fixed format. The first
373 contains the login, uid, and gid of the user who caused the file to be written.
374 There are known cases where a negative gid is used, so we allow for both
375 negative uids and gids. The second contains the mail address of the message's
376 sender, enclosed in <>. The third contains the time the message was received,
377 and the number of warning messages for delivery delays that have been sent. */
379 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
381 p = big_buffer + Ustrlen(big_buffer);
382 while (p > big_buffer && isspace(p[-1])) p--;
384 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
385 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
387 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
389 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
390 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
392 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
395 originator_login = string_copy(big_buffer);
396 originator_uid = (uid_t)uid;
397 originator_gid = (gid_t)gid;
400 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
401 n = Ustrlen(big_buffer);
402 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
403 goto SPOOL_FORMAT_ERROR;
405 sender_address = store_get(n-2);
406 Ustrncpy(sender_address, big_buffer+1, n-3);
407 sender_address[n-3] = 0;
410 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
411 if (sscanf(CS big_buffer, TIME_T_FMT " %d", &received_time.tv_sec, &warning_count) != 2)
412 goto SPOOL_FORMAT_ERROR;
413 received_time.tv_usec = 0;
415 message_age = time(NULL) - received_time.tv_sec;
417 #ifndef COMPILE_UTILITY
418 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
419 originator_login, (long int)originator_uid, (long int)originator_gid,
421 #endif /* COMPILE_UTILITY */
423 /* Now there may be a number of optional lines, each starting with "-". If you
424 add a new setting here, make sure you set the default above.
426 Because there are now quite a number of different possibilities, we use a
427 switch on the first character to avoid too many failing tests. Thanks to Nico
428 Erfurth for the patch that implemented this. I have made it even more efficient
429 by not re-scanning the first two characters.
431 To allow new versions of Exim that add additional flags to interwork with older
432 versions that do not understand them, just ignore any lines starting with "-"
433 that we don't recognize. Otherwise it wouldn't be possible to back off a new
434 version that left new-style flags written on the spool. */
440 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
441 if (big_buffer[0] != '-') break;
442 while ( (len = Ustrlen(big_buffer)) == big_buffer_size-1
443 && big_buffer[len-1] != '\n'
445 { /* buffer not big enough for line; certs make this possible */
447 if (big_buffer_size >= BIG_BUFFER_SIZE*4) goto SPOOL_READ_ERROR;
448 buf = store_get_perm(big_buffer_size *= 2);
449 memcpy(buf, big_buffer, --len);
451 if (Ufgets(big_buffer+len, big_buffer_size-len, f) == NULL)
452 goto SPOOL_READ_ERROR;
454 big_buffer[len-1] = 0;
456 switch(big_buffer[1])
460 /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
461 variable, because Exim allows any number of them, with arbitrary names.
462 The line in the spool file is "-acl[cm] <name> <length>". The name excludes
465 if (Ustrncmp(p, "clc ", 4) == 0 ||
466 Ustrncmp(p, "clm ", 4) == 0)
468 uschar *name, *endptr;
471 endptr = Ustrchr(big_buffer + 6, ' ');
472 if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
473 name = string_sprintf("%c%.*s", big_buffer[4],
474 (int)(endptr - big_buffer - 6), big_buffer + 6);
475 if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
476 node = acl_var_create(name);
477 node->data.ptr = store_get(count + 1);
478 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
479 ((uschar*)node->data.ptr)[count] = 0;
482 else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
483 allow_unqualified_recipient = TRUE;
484 else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
485 allow_unqualified_sender = TRUE;
487 else if (Ustrncmp(p, "uth_id", 6) == 0)
488 authenticated_id = string_copy(big_buffer + 9);
489 else if (Ustrncmp(p, "uth_sender", 10) == 0)
490 authenticated_sender = string_copy(big_buffer + 13);
491 else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
492 smtp_active_hostname = string_copy(big_buffer + 17);
494 /* For long-term backward compatibility, we recognize "-acl", which was
495 used before the number of ACL variables changed from 10 to 20. This was
496 before the subsequent change to an arbitrary number of named variables.
497 This code is retained so that upgrades from very old versions can still
498 handle old-format spool files. The value given after "-acl" is a number
499 that is 0-9 for connection variables, and 10-19 for message variables. */
501 else if (Ustrncmp(p, "cl ", 3) == 0)
503 unsigned index, count;
504 uschar name[20]; /* Need plenty of space for %u format */
506 if ( sscanf(CS big_buffer + 5, "%u %u", &index, &count) != 2
508 || count > 16384 /* arbitrary limit on variable size */
510 goto SPOOL_FORMAT_ERROR;
512 (void) string_format(name, sizeof(name), "%c%u", 'c', index);
514 (void) string_format(name, sizeof(name), "%c%u", 'm', index - 10);
515 node = acl_var_create(name);
516 node->data.ptr = store_get(count + 1);
517 /* We sanity-checked the count, so disable the Coverity error */
518 /* coverity[tainted_data] */
519 if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
520 (US node->data.ptr)[count] = '\0';
525 if (Ustrncmp(p, "ody_linecount", 13) == 0)
526 body_linecount = Uatoi(big_buffer + 15);
527 else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
528 body_zerocount = Uatoi(big_buffer + 15);
529 #ifdef EXPERIMENTAL_BRIGHTMAIL
530 else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
531 bmi_verdicts = string_copy(big_buffer + 14);
536 if (Ustrcmp(p, "eliver_firsttime") == 0)
537 deliver_firsttime = TRUE;
538 /* Check if the dsn flags have been set in the header file */
539 else if (Ustrncmp(p, "sn_ret", 6) == 0)
540 dsn_ret= atoi(CS big_buffer + 8);
541 else if (Ustrncmp(p, "sn_envid", 8) == 0)
542 dsn_envid = string_copy(big_buffer + 11);
546 if (Ustrncmp(p, "rozen", 5) == 0)
548 deliver_freeze = TRUE;
549 if (sscanf(CS big_buffer+7, TIME_T_FMT, &deliver_frozen_at) != 1)
550 goto SPOOL_READ_ERROR;
555 if (Ustrcmp(p, "ost_lookup_deferred") == 0)
556 host_lookup_deferred = TRUE;
557 else if (Ustrcmp(p, "ost_lookup_failed") == 0)
558 host_lookup_failed = TRUE;
559 else if (Ustrncmp(p, "ost_auth", 8) == 0)
560 sender_host_authenticated = string_copy(big_buffer + 11);
561 else if (Ustrncmp(p, "ost_name", 8) == 0)
562 sender_host_name = string_copy(big_buffer + 11);
563 else if (Ustrncmp(p, "elo_name", 8) == 0)
564 sender_helo_name = string_copy(big_buffer + 11);
566 /* We now record the port number after the address, separated by a
567 dot. For compatibility during upgrading, do nothing if there
568 isn't a value (it gets left at zero). */
570 else if (Ustrncmp(p, "ost_address", 11) == 0)
572 sender_host_port = host_address_extract_port(big_buffer + 14);
573 sender_host_address = string_copy(big_buffer + 14);
578 if (Ustrncmp(p, "nterface_address", 16) == 0)
580 interface_port = host_address_extract_port(big_buffer + 19);
581 interface_address = string_copy(big_buffer + 19);
583 else if (Ustrncmp(p, "dent", 4) == 0)
584 sender_ident = string_copy(big_buffer + 7);
588 if (Ustrcmp(p, "ocal") == 0)
590 else if (Ustrcmp(big_buffer, "-localerror") == 0)
591 local_error_message = TRUE;
592 else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
593 local_scan_data = string_copy(big_buffer + 12);
597 if (Ustrcmp(p, "anual_thaw") == 0) deliver_manual_thaw = TRUE;
598 else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
599 max_received_linelength = Uatoi(big_buffer + 24);
603 if (*p == 0) dont_deliver = TRUE; /* -N */
607 if (Ustrncmp(p, "eceived_protocol", 16) == 0)
608 received_protocol = string_copy(big_buffer + 19);
609 else if (Ustrncmp(p, "eceived_time_usec", 17) == 0)
612 if (sscanf(CS big_buffer + 21, "%u", &usec) == 1)
613 received_time.tv_usec = usec;
618 if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
619 sender_set_untrusted = TRUE;
620 #ifdef WITH_CONTENT_SCAN
621 else if (Ustrncmp(p, "pam_bar ", 8) == 0)
622 spam_bar = string_copy(big_buffer + 10);
623 else if (Ustrncmp(p, "pam_score ", 10) == 0)
624 spam_score = string_copy(big_buffer + 12);
625 else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
626 spam_score_int = string_copy(big_buffer + 16);
628 #ifndef COMPILE_UTILITY
629 else if (Ustrncmp(p, "pool_file_wireformat", 20) == 0)
630 spool_file_wireformat = TRUE;
632 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
633 else if (Ustrncmp(p, "mtputf8", 7) == 0)
634 message_smtputf8 = TRUE;
640 if (Ustrncmp(p, "ls_certificate_verified", 23) == 0)
641 tls_in.certificate_verified = TRUE;
642 else if (Ustrncmp(p, "ls_cipher", 9) == 0)
643 tls_in.cipher = string_copy(big_buffer + 12);
644 # ifndef COMPILE_UTILITY /* tls support fns not built in */
645 else if (Ustrncmp(p, "ls_ourcert", 10) == 0)
646 (void) tls_import_cert(big_buffer + 13, &tls_in.ourcert);
647 else if (Ustrncmp(p, "ls_peercert", 11) == 0)
648 (void) tls_import_cert(big_buffer + 14, &tls_in.peercert);
650 else if (Ustrncmp(p, "ls_peerdn", 9) == 0)
651 tls_in.peerdn = string_unprinting(string_copy(big_buffer + 12));
652 else if (Ustrncmp(p, "ls_sni", 6) == 0)
653 tls_in.sni = string_unprinting(string_copy(big_buffer + 9));
654 else if (Ustrncmp(p, "ls_ocsp", 7) == 0)
655 tls_in.ocsp = big_buffer[10] - '0';
659 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
661 if (Ustrncmp(p, "tf8_downcvt", 11) == 0)
662 message_utf8_downconvert = 1;
663 else if (Ustrncmp(p, "tf8_optdowncvt", 15) == 0)
664 message_utf8_downconvert = -1;
668 default: /* Present because some compilers complain if all */
669 break; /* possibilities are not covered. */
673 /* Build sender_fullhost if required */
675 #ifndef COMPILE_UTILITY
676 host_build_sender_fullhost();
677 #endif /* COMPILE_UTILITY */
679 #ifndef COMPILE_UTILITY
681 debug_printf("sender_local=%d ident=%s\n", sender_local,
682 (sender_ident == NULL)? US"unset" : sender_ident);
683 #endif /* COMPILE_UTILITY */
685 /* We now have the tree of addresses NOT to deliver to, or a line
686 containing "XX", indicating no tree. */
688 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
689 !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
690 goto SPOOL_FORMAT_ERROR;
692 #ifndef COMPILE_UTILITY
695 debug_printf("Non-recipients:\n");
696 debug_print_tree(tree_nonrecipients);
698 #endif /* COMPILE_UTILITY */
700 /* After reading the tree, the next line has not yet been read into the
701 buffer. It contains the count of recipients which follow on separate lines.
702 Apply an arbitrary sanity check.*/
704 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
705 if (sscanf(CS big_buffer, "%d", &rcount) != 1 || rcount > 16384)
706 goto SPOOL_FORMAT_ERROR;
708 #ifndef COMPILE_UTILITY
709 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
710 #endif /* COMPILE_UTILITY */
712 recipients_list_max = rcount;
713 recipients_list = store_get(rcount * sizeof(recipient_item));
715 /* We sanitised the count and know we have enough memory, so disable
716 the Coverity error on recipients_count */
717 /* coverity[tainted_data] */
719 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
724 uschar *orcpt = NULL;
725 uschar *errors_to = NULL;
728 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
729 nn = Ustrlen(big_buffer);
730 if (nn < 2) goto SPOOL_FORMAT_ERROR;
732 /* Remove the newline; this terminates the address if there is no additional
735 p = big_buffer + nn - 1;
738 /* Look back from the end of the line for digits and special terminators.
739 Since an address must end with a domain, we can tell that extra data is
740 present by the presence of the terminator, which is always some character
741 that cannot exist in a domain. (If I'd thought of the need for additional
742 data early on, I'd have put it at the start, with the address at the end. As
743 it is, we have to operate backwards. Addresses are permitted to contain
746 This code has to cope with various versions of this data that have evolved
747 over time. In all cases, the line might just contain an address, with no
748 additional data. Otherwise, the possibilities are as follows:
750 Exim 3 type: <address><space><digits>,<digits>,<digits>
752 The second set of digits is the parent number for one_time addresses. The
753 other values were remnants of earlier experiments that were abandoned.
755 Exim 4 first type: <address><space><digits>
757 The digits are the parent number for one_time addresses.
759 Exim 4 new type: <address><space><data>#<type bits>
761 The type bits indicate what the contents of the data are.
763 Bit 01 indicates that, reading from right to left, the data
764 ends with <errors_to address><space><len>,<pno> where pno is
765 the parent number for one_time addresses, and len is the length
766 of the errors_to address (zero meaning none).
768 Bit 02 indicates that, again reading from right to left, the data continues
769 with orcpt len(orcpt),dsn_flags
772 while (isdigit(*p)) p--;
774 /* Handle Exim 3 spool files */
779 while (isdigit(*(--p)) || *p == ',');
783 (void)sscanf(CS p, "%d,%d", &dummy, &pno);
787 /* Handle early Exim 4 spool files */
792 (void)sscanf(CS p, "%d", &pno);
795 /* Handle current format Exim 4 spool files */
801 #if !defined (COMPILE_UTILITY)
802 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim 4 standard format spoolfile\n");
805 (void)sscanf(CS p+1, "%d", &flags);
807 if ((flags & 0x01) != 0) /* one_time data exists */
810 while (isdigit(*(--p)) || *p == ',' || *p == '-');
811 (void)sscanf(CS p+1, "%d,%d", &len, &pno);
816 errors_to = string_copy(p);
820 *(--p) = 0; /* Terminate address */
821 if ((flags & 0x02) != 0) /* one_time data exists */
824 while (isdigit(*(--p)) || *p == ',' || *p == '-');
825 (void)sscanf(CS p+1, "%d,%d", &len, &dsn_flags);
830 orcpt = string_copy(p);
834 *(--p) = 0; /* Terminate address */
836 #if !defined(COMPILE_UTILITY)
838 { DEBUG(D_deliver) debug_printf("**** SPOOL_IN - No additional fields\n"); }
840 if ((orcpt != NULL) || (dsn_flags != 0))
842 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| orcpt: |%s| dsn_flags: %d\n",
843 big_buffer, orcpt, dsn_flags);
845 if (errors_to != NULL)
847 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: |%s| errorsto: |%s|\n",
848 big_buffer, errors_to);
852 recipients_list[recipients_count].address = string_copy(big_buffer);
853 recipients_list[recipients_count].pno = pno;
854 recipients_list[recipients_count].errors_to = errors_to;
855 recipients_list[recipients_count].orcpt = orcpt;
856 recipients_list[recipients_count].dsn_flags = dsn_flags;
859 /* The remainder of the spool header file contains the headers for the message,
860 separated off from the previous data by a blank line. Each header is preceded
861 by a count of its length and either a certain letter (for various identified
862 headers), space (for a miscellaneous live header) or an asterisk (for a header
863 that has been rewritten). Count the Received: headers. We read the headers
864 always, in order to check on the format of the file, but only create a header
865 list if requested to do so. */
868 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
869 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
871 while ((n = fgetc(f)) != EOF)
877 if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
878 if(ungetc(n, f) == EOF || fscanf(f, "%d%c ", &n, flag) == EOF)
879 goto SPOOL_READ_ERROR;
880 if (flag[0] != '*') message_size += n; /* Omit non-transmitted headers */
884 h = store_get(sizeof(header_line));
888 h->text = store_get(n+1);
890 if (h->type == htype_received) received_count++;
892 if (header_list == NULL) header_list = h;
893 else header_last->next = h;
896 for (i = 0; i < n; i++)
899 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
900 if (c == '\n' && h->type != htype_old) message_linecount++;
906 /* Not requiring header data, just skip through the bytes */
908 else for (i = 0; i < n; i++)
911 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
915 /* We have successfully read the data in the header file. Update the message
916 line count by adding the body linecount to the header linecount. Close the file
917 and give a positive response. */
919 #ifndef COMPILE_UTILITY
920 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
921 body_linecount, message_linecount);
922 #endif /* COMPILE_UTILITY */
924 message_linecount += body_linecount;
927 return spool_read_OK;
930 /* There was an error reading the spool or there was missing data,
931 or there was a format error. A "read error" with no errno means an
932 unexpected EOF, which we treat as a format error. */
939 #ifndef COMPILE_UTILITY
940 DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
941 #endif /* COMPILE_UTILITY */
945 return inheader? spool_read_hdrerror : spool_read_enverror;
950 #ifndef COMPILE_UTILITY
951 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
952 #endif /* COMPILE_UTILITY */
955 errno = ERRNO_SPOOLFORMAT;
956 return inheader? spool_read_hdrerror : spool_read_enverror;
961 /* End of spool_in.c */