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)
43 /* If split_spool_directory is set, first look for the file in the appropriate
44 sub-directory of the input directory. If it is not found there, try the input
45 directory itself, to pick up leftovers from before the splitting. If split_
46 spool_directory is not set, first look in the main input directory. If it is
47 not found there, try the split sub-directory, in case it is left over from a
50 for (int i = 0; i < 2; i++)
55 set_subdir_str(message_subdir, id, i);
56 fname = spool_fname(US"input", message_subdir, id, US"-D");
57 DEBUG(D_deliver) debug_printf("Trying spool file %s\n", fname);
59 /* We protect against symlink attacks both in not propagating the
60 * file-descriptor to other processes as we exec, and also ensuring that we
61 * don't even open symlinks.
62 * No -D file inside the spool area should be a symlink.
64 if ((fd = Uopen(fname,
71 O_RDWR | O_APPEND, 0)) >= 0)
78 log_write(0, LOG_MAIN, "Spool%s%s file %s-D not found",
79 *queue_name ? US" Q=" : US"",
80 *queue_name ? queue_name : US"",
84 log_write(0, LOG_MAIN, "Spool error for %s: %s", fname, strerror(errno));
89 /* File is open and message_subdir is set. Set the close-on-exec flag, and lock
90 the file. We lock only the first line of the file (containing the message ID)
91 because this apparently is needed for running Exim under Cygwin. If the entire
92 file is locked in one process, a sub-process cannot access it, even when passed
93 an open file descriptor (at least, I think that's the Cygwin story). On real
94 Unix systems it doesn't make any difference as long as Exim is consistent in
98 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
101 lock_data.l_type = F_WRLCK;
102 lock_data.l_whence = SEEK_SET;
103 lock_data.l_start = 0;
104 lock_data.l_len = SPOOL_DATA_START_OFFSET;
106 if (fcntl(fd, F_SETLK, &lock_data) < 0)
108 log_write(L_skip_delivery,
110 "Spool file is locked (another process is handling this message)");
116 /* Get the size of the data; don't include the leading filename line
117 in the count, but add one for the newline before the data. */
119 if (fstat(fd, &statbuf) == 0)
121 message_body_size = statbuf.st_size - SPOOL_DATA_START_OFFSET;
122 message_size = message_body_size + 1;
127 #endif /* COMPILE_UTILITY */
131 /*************************************************
132 * Read non-recipients tree from spool file *
133 *************************************************/
135 /* The tree of non-recipients is written to the spool file in a form that
136 makes it easy to read back into a tree. The format is as follows:
138 . Each node is preceded by two letter(Y/N) indicating whether it has left
139 or right children. There's one space after the two flags, before the name.
141 . The left subtree (if any) then follows, then the right subtree (if any).
143 This function is entered with the next input line in the buffer. Note we must
144 save the right flag before recursing with the same buffer.
146 Once the tree is read, we re-construct the balance fields by scanning the tree.
147 I forgot to write them out originally, and the compatible fix is to do it this
148 way. This initial local recursing function does the necessary.
153 Returns: maximum depth below the node, including the node itself
157 count_below(tree_node *node)
160 if (node == NULL) return 0;
161 nleft = count_below(node->left);
162 nright = count_below(node->right);
163 node->balance = (nleft > nright)? 1 : ((nright > nleft)? 2 : 0);
164 return 1 + ((nleft > nright)? nleft : nright);
167 /* This is the real function...
170 connect pointer to the root of the tree
171 f FILE to read data from
172 buffer contains next input line; further lines read into it
173 buffer_size size of the buffer
175 Returns: FALSE on format error
179 read_nonrecipients_tree(tree_node **connect, FILE *f, uschar *buffer,
183 int n = Ustrlen(buffer);
184 BOOL right = buffer[1] == 'Y';
186 if (n < 5) return FALSE; /* malformed line */
187 buffer[n-1] = 0; /* Remove \n */
188 node = store_get(sizeof(tree_node) + n - 3, TRUE); /* rcpt names tainted */
190 Ustrcpy(node->name, buffer + 3);
191 node->data.ptr = NULL;
193 if (buffer[0] == 'Y')
195 if (Ufgets(buffer, buffer_size, f) == NULL ||
196 !read_nonrecipients_tree(&node->left, f, buffer, buffer_size))
199 else node->left = NULL;
203 if (Ufgets(buffer, buffer_size, f) == NULL ||
204 !read_nonrecipients_tree(&node->right, f, buffer, buffer_size))
207 else node->right = NULL;
209 (void) count_below(*connect);
216 /* Reset all the global variables to their default values. However, there is
217 one exception. DO NOT change the default value of dont_deliver, because it may
218 be forced by an external setting. */
221 spool_clear_header_globals(void)
223 acl_var_c = acl_var_m = NULL;
224 authenticated_id = NULL;
225 authenticated_sender = NULL;
226 f.allow_unqualified_recipient = FALSE;
227 f.allow_unqualified_sender = FALSE;
230 f.deliver_firsttime = FALSE;
231 f.deliver_freeze = FALSE;
232 deliver_frozen_at = 0;
233 f.deliver_manual_thaw = FALSE;
234 /* f.dont_deliver must NOT be reset */
235 header_list = header_last = NULL;
236 host_lookup_deferred = FALSE;
237 host_lookup_failed = FALSE;
238 interface_address = NULL;
240 f.local_error_message = FALSE;
241 #ifdef HAVE_LOCAL_SCAN
242 local_scan_data = NULL;
244 max_received_linelength = 0;
245 message_linecount = 0;
246 received_protocol = NULL;
248 recipients_list = NULL;
249 sender_address = NULL;
250 sender_fullhost = NULL;
251 sender_helo_name = NULL;
252 sender_host_address = NULL;
253 sender_host_name = NULL;
254 sender_host_port = 0;
255 sender_host_authenticated = NULL;
257 f.sender_local = FALSE;
258 f.sender_set_untrusted = FALSE;
259 smtp_active_hostname = primary_hostname;
260 #ifndef COMPILE_UTILITY
261 f.spool_file_wireformat = FALSE;
263 tree_nonrecipients = NULL;
265 #ifdef EXPERIMENTAL_BRIGHTMAIL
272 f.dkim_disable_verify = FALSE;
273 dkim_collect_input = 0;
277 tls_in.certificate_verified = FALSE;
279 tls_in.dane_verified = FALSE;
281 tls_in.cipher = NULL;
282 # ifndef COMPILE_UTILITY /* tls support fns not built in */
283 tls_free_cert(&tls_in.ourcert);
284 tls_free_cert(&tls_in.peercert);
286 tls_in.peerdn = NULL;
288 tls_in.ocsp = OCSP_NOT_REQ;
291 #ifdef WITH_CONTENT_SCAN
294 spam_score_int = NULL;
297 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
298 message_smtputf8 = FALSE;
299 message_utf8_downconvert = 0;
307 /*************************************************
308 * Read spool header file *
309 *************************************************/
311 /* This function reads a spool header file and places the data into the
312 appropriate global variables. The header portion is always read, but header
313 structures are built only if read_headers is set true. It isn't, for example,
314 while generating -bp output.
316 It may be possible for blocks of nulls (binary zeroes) to get written on the
317 end of a file if there is a system crash during writing. It was observed on an
318 earlier version of Exim that omitted to fsync() the files - this is thought to
319 have been the cause of that incident, but in any case, this code must be robust
320 against such an event, and if such a file is encountered, it must be treated as
323 As called from deliver_message() (at least) we are running as root.
326 name name of the header file, including the -H
327 read_headers TRUE if in-store header structures are to be built
328 subdir_set TRUE is message_subdir is already set
330 Returns: spool_read_OK success
331 spool_read_notopen open failed
332 spool_read_enverror error in the envelope portion
333 spool_read_hdrerror error in the header portion
337 spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
343 BOOL inheader = FALSE;
345 /* Reset all the global variables to their default values. However, there is
346 one exception. DO NOT change the default value of dont_deliver, because it may
347 be forced by an external setting. */
349 spool_clear_header_globals();
351 /* Generate the full name and open the file. If message_subdir is already
352 set, just look in the given directory. Otherwise, look in both the split
353 and unsplit directories, as for the data file above. */
355 for (int n = 0; n < 2; n++)
358 set_subdir_str(message_subdir, name, n);
360 if ((fp = Ufopen(spool_fname(US"input", message_subdir, name, US""), "rb")))
362 if (n != 0 || subdir_set || errno != ENOENT)
363 return spool_read_notopen;
368 #ifndef COMPILE_UTILITY
369 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
370 #endif /* COMPILE_UTILITY */
372 /* The first line of a spool file contains the message id followed by -H (i.e.
373 the file name), in order to make the file self-identifying. */
375 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
376 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
377 Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
378 goto SPOOL_FORMAT_ERROR;
380 /* The next three lines in the header file are in a fixed format. The first
381 contains the login, uid, and gid of the user who caused the file to be written.
382 There are known cases where a negative gid is used, so we allow for both
383 negative uids and gids. The second contains the mail address of the message's
384 sender, enclosed in <>. The third contains the time the message was received,
385 and the number of warning messages for delivery delays that have been sent. */
387 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
390 uschar *p = big_buffer + Ustrlen(big_buffer);
391 while (p > big_buffer && isspace(p[-1])) p--;
393 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
394 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
396 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
398 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
399 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
401 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
405 originator_login = string_copy(big_buffer);
406 originator_uid = (uid_t)uid;
407 originator_gid = (gid_t)gid;
410 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
411 n = Ustrlen(big_buffer);
412 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
413 goto SPOOL_FORMAT_ERROR;
415 sender_address = store_get(n-2, TRUE); /* tainted */
416 Ustrncpy(sender_address, big_buffer+1, n-3);
417 sender_address[n-3] = 0;
420 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
421 if (sscanf(CS big_buffer, TIME_T_FMT " %d", &received_time.tv_sec, &warning_count) != 2)
422 goto SPOOL_FORMAT_ERROR;
423 received_time.tv_usec = 0;
425 message_age = time(NULL) - received_time.tv_sec;
427 #ifndef COMPILE_UTILITY
428 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
429 originator_login, (long int)originator_uid, (long int)originator_gid,
431 #endif /* COMPILE_UTILITY */
433 /* Now there may be a number of optional lines, each starting with "-". If you
434 add a new setting here, make sure you set the default above.
436 Because there are now quite a number of different possibilities, we use a
437 switch on the first character to avoid too many failing tests. Thanks to Nico
438 Erfurth for the patch that implemented this. I have made it even more efficient
439 by not re-scanning the first two characters.
441 To allow new versions of Exim that add additional flags to interwork with older
442 versions that do not understand them, just ignore any lines starting with "-"
443 that we don't recognize. Otherwise it wouldn't be possible to back off a new
444 version that left new-style flags written on the spool.
446 If the line starts with "--" the content of the variable is tainted. */
455 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
456 if (big_buffer[0] != '-') break;
457 while ( (len = Ustrlen(big_buffer)) == big_buffer_size-1
458 && big_buffer[len-1] != '\n'
460 { /* buffer not big enough for line; certs make this possible */
462 if (big_buffer_size >= BIG_BUFFER_SIZE*4) goto SPOOL_READ_ERROR;
463 buf = store_get_perm(big_buffer_size *= 2, FALSE);
464 memcpy(buf, big_buffer, --len);
466 if (Ufgets(big_buffer+len, big_buffer_size-len, fp) == NULL)
467 goto SPOOL_READ_ERROR;
469 big_buffer[len-1] = 0;
471 tainted = big_buffer[1] == '-';
472 var = big_buffer + (tainted ? 2 : 1);
479 /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
480 variable, because Exim allows any number of them, with arbitrary names.
481 The line in the spool file is "-acl[cm] <name> <length>". The name excludes
484 if (Ustrncmp(p, "clc ", 4) == 0 ||
485 Ustrncmp(p, "clm ", 4) == 0)
487 uschar *name, *endptr;
490 endptr = Ustrchr(var + 5, ' ');
491 if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
492 name = string_sprintf("%c%.*s", var[3],
493 (int)(endptr - var - 5), var + 5);
494 if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
495 node = acl_var_create(name);
496 node->data.ptr = store_get(count + 1, tainted);
497 if (fread(node->data.ptr, 1, count+1, fp) < count) goto SPOOL_READ_ERROR;
498 ((uschar*)node->data.ptr)[count] = 0;
501 else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
502 f.allow_unqualified_recipient = TRUE;
503 else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
504 f.allow_unqualified_sender = TRUE;
506 else if (Ustrncmp(p, "uth_id", 6) == 0)
507 authenticated_id = string_copy_taint(var + 8, tainted);
508 else if (Ustrncmp(p, "uth_sender", 10) == 0)
509 authenticated_sender = string_copy_taint(var + 12, tainted);
510 else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
511 smtp_active_hostname = string_copy_taint(var + 16, tainted);
513 /* For long-term backward compatibility, we recognize "-acl", which was
514 used before the number of ACL variables changed from 10 to 20. This was
515 before the subsequent change to an arbitrary number of named variables.
516 This code is retained so that upgrades from very old versions can still
517 handle old-format spool files. The value given after "-acl" is a number
518 that is 0-9 for connection variables, and 10-19 for message variables. */
520 else if (Ustrncmp(p, "cl ", 3) == 0)
522 unsigned index, count;
523 uschar name[20]; /* Need plenty of space for %u format */
525 if ( sscanf(CS var + 4, "%u %u", &index, &count) != 2
527 || count > 16384 /* arbitrary limit on variable size */
529 goto SPOOL_FORMAT_ERROR;
531 (void) string_format(name, sizeof(name), "%c%u", 'c', index);
533 (void) string_format(name, sizeof(name), "%c%u", 'm', index - 10);
534 node = acl_var_create(name);
535 node->data.ptr = store_get(count + 1, tainted);
536 /* We sanity-checked the count, so disable the Coverity error */
537 /* coverity[tainted_data] */
538 if (fread(node->data.ptr, 1, count+1, fp) < count) goto SPOOL_READ_ERROR;
539 (US node->data.ptr)[count] = '\0';
544 if (Ustrncmp(p, "ody_linecount", 13) == 0)
545 body_linecount = Uatoi(var + 14);
546 else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
547 body_zerocount = Uatoi(var + 14);
548 #ifdef EXPERIMENTAL_BRIGHTMAIL
549 else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
550 bmi_verdicts = string_copy_taint(var + 13, tainted);
555 if (Ustrcmp(p, "eliver_firsttime") == 0)
556 f.deliver_firsttime = TRUE;
557 /* Check if the dsn flags have been set in the header file */
558 else if (Ustrncmp(p, "sn_ret", 6) == 0)
559 dsn_ret= atoi(CS var + 7);
560 else if (Ustrncmp(p, "sn_envid", 8) == 0)
561 dsn_envid = string_copy_taint(var + 10, tainted);
565 if (Ustrncmp(p, "rozen", 5) == 0)
567 f.deliver_freeze = TRUE;
568 if (sscanf(CS var+6, TIME_T_FMT, &deliver_frozen_at) != 1)
569 goto SPOOL_READ_ERROR;
574 if (Ustrcmp(p, "ost_lookup_deferred") == 0)
575 host_lookup_deferred = TRUE;
576 else if (Ustrcmp(p, "ost_lookup_failed") == 0)
577 host_lookup_failed = TRUE;
578 else if (Ustrncmp(p, "ost_auth", 8) == 0)
579 sender_host_authenticated = string_copy_taint(var + 10, tainted);
580 else if (Ustrncmp(p, "ost_name", 8) == 0)
581 sender_host_name = string_copy_taint(var + 10, tainted);
582 else if (Ustrncmp(p, "elo_name", 8) == 0)
583 sender_helo_name = string_copy_taint(var + 10, tainted);
585 /* We now record the port number after the address, separated by a
586 dot. For compatibility during upgrading, do nothing if there
587 isn't a value (it gets left at zero). */
589 else if (Ustrncmp(p, "ost_address", 11) == 0)
591 sender_host_port = host_address_extract_port(var + 13);
592 sender_host_address = string_copy_taint(var + 13, tainted);
597 if (Ustrncmp(p, "nterface_address", 16) == 0)
599 interface_port = host_address_extract_port(var + 18);
600 interface_address = string_copy_taint(var + 18, tainted);
602 else if (Ustrncmp(p, "dent", 4) == 0)
603 sender_ident = string_copy_taint(var + 6, tainted);
607 if (Ustrcmp(p, "ocal") == 0)
608 f.sender_local = TRUE;
609 else if (Ustrcmp(var, "localerror") == 0)
610 f.local_error_message = TRUE;
611 #ifdef HAVE_LOCAL_SCAN
612 else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
613 local_scan_data = string_copy_taint(var + 11, tainted);
618 if (Ustrcmp(p, "anual_thaw") == 0)
619 f.deliver_manual_thaw = TRUE;
620 else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
621 max_received_linelength = Uatoi(var + 23);
625 if (*p == 0) f.dont_deliver = TRUE; /* -N */
629 if (Ustrncmp(p, "eceived_protocol", 16) == 0)
630 received_protocol = string_copy_taint(var + 18, tainted);
631 else if (Ustrncmp(p, "eceived_time_usec", 17) == 0)
634 if (sscanf(CS var + 20, "%u", &usec) == 1)
635 received_time.tv_usec = usec;
640 if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
641 f.sender_set_untrusted = TRUE;
642 #ifdef WITH_CONTENT_SCAN
643 else if (Ustrncmp(p, "pam_bar ", 8) == 0)
644 spam_bar = string_copy_taint(var + 9, tainted);
645 else if (Ustrncmp(p, "pam_score ", 10) == 0)
646 spam_score = string_copy_taint(var + 11, tainted);
647 else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
648 spam_score_int = string_copy_taint(var + 15, tainted);
650 #ifndef COMPILE_UTILITY
651 else if (Ustrncmp(p, "pool_file_wireformat", 20) == 0)
652 f.spool_file_wireformat = TRUE;
654 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
655 else if (Ustrncmp(p, "mtputf8", 7) == 0)
656 message_smtputf8 = TRUE;
662 if (Ustrncmp(p, "ls_", 3) == 0)
664 const uschar * q = p + 3;
665 if (Ustrncmp(q, "certificate_verified", 20) == 0)
666 tls_in.certificate_verified = TRUE;
667 else if (Ustrncmp(q, "cipher", 6) == 0)
668 tls_in.cipher = string_copy_taint(var + 11, tainted);
669 # ifndef COMPILE_UTILITY /* tls support fns not built in */
670 else if (Ustrncmp(q, "ourcert", 7) == 0)
671 (void) tls_import_cert(var + 12, &tls_in.ourcert);
672 else if (Ustrncmp(q, "peercert", 8) == 0)
673 (void) tls_import_cert(var + 13, &tls_in.peercert);
675 else if (Ustrncmp(q, "peerdn", 6) == 0)
676 tls_in.peerdn = string_unprinting(string_copy_taint(var + 11, tainted));
677 else if (Ustrncmp(q, "sni", 3) == 0)
678 tls_in.sni = string_unprinting(string_copy_taint(var + 8, tainted));
679 else if (Ustrncmp(q, "ocsp", 4) == 0)
680 tls_in.ocsp = var[9] - '0';
681 # ifdef EXPERIMENTAL_TLS_RESUME
682 else if (Ustrncmp(q, "resumption", 10) == 0)
683 tls_in.resumption = var[15] - 'A';
690 #if defined(SUPPORT_I18N) && !defined(COMPILE_UTILITY)
692 if (Ustrncmp(p, "tf8_downcvt", 11) == 0)
693 message_utf8_downconvert = 1;
694 else if (Ustrncmp(p, "tf8_optdowncvt", 15) == 0)
695 message_utf8_downconvert = -1;
699 default: /* Present because some compilers complain if all */
700 break; /* possibilities are not covered. */
704 /* Build sender_fullhost if required */
706 #ifndef COMPILE_UTILITY
707 host_build_sender_fullhost();
708 #endif /* COMPILE_UTILITY */
710 #ifndef COMPILE_UTILITY
712 debug_printf("sender_local=%d ident=%s\n", f.sender_local,
713 sender_ident ? sender_ident : US"unset");
714 #endif /* COMPILE_UTILITY */
716 /* We now have the tree of addresses NOT to deliver to, or a line
717 containing "XX", indicating no tree. */
719 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
720 !read_nonrecipients_tree(&tree_nonrecipients, fp, big_buffer, big_buffer_size))
721 goto SPOOL_FORMAT_ERROR;
723 #ifndef COMPILE_UTILITY
726 debug_printf("Non-recipients:\n");
727 debug_print_tree(tree_nonrecipients);
729 #endif /* COMPILE_UTILITY */
731 /* After reading the tree, the next line has not yet been read into the
732 buffer. It contains the count of recipients which follow on separate lines.
733 Apply an arbitrary sanity check.*/
735 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
736 if (sscanf(CS big_buffer, "%d", &rcount) != 1 || rcount > 16384)
737 goto SPOOL_FORMAT_ERROR;
739 #ifndef COMPILE_UTILITY
740 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
741 #endif /* COMPILE_UTILITY */
743 recipients_list_max = rcount;
744 recipients_list = store_get(rcount * sizeof(recipient_item), FALSE);
746 /* We sanitised the count and know we have enough memory, so disable
747 the Coverity error on recipients_count */
748 /* coverity[tainted_data] */
750 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
755 uschar *orcpt = NULL;
756 uschar *errors_to = NULL;
759 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
760 nn = Ustrlen(big_buffer);
761 if (nn < 2) goto SPOOL_FORMAT_ERROR;
763 /* Remove the newline; this terminates the address if there is no additional
766 p = big_buffer + nn - 1;
769 /* Look back from the end of the line for digits and special terminators.
770 Since an address must end with a domain, we can tell that extra data is
771 present by the presence of the terminator, which is always some character
772 that cannot exist in a domain. (If I'd thought of the need for additional
773 data early on, I'd have put it at the start, with the address at the end. As
774 it is, we have to operate backwards. Addresses are permitted to contain
777 This code has to cope with various versions of this data that have evolved
778 over time. In all cases, the line might just contain an address, with no
779 additional data. Otherwise, the possibilities are as follows:
781 Exim 3 type: <address><space><digits>,<digits>,<digits>
783 The second set of digits is the parent number for one_time addresses. The
784 other values were remnants of earlier experiments that were abandoned.
786 Exim 4 first type: <address><space><digits>
788 The digits are the parent number for one_time addresses.
790 Exim 4 new type: <address><space><data>#<type bits>
792 The type bits indicate what the contents of the data are.
794 Bit 01 indicates that, reading from right to left, the data
795 ends with <errors_to address><space><len>,<pno> where pno is
796 the parent number for one_time addresses, and len is the length
797 of the errors_to address (zero meaning none).
799 Bit 02 indicates that, again reading from right to left, the data continues
800 with orcpt len(orcpt),dsn_flags
803 while (isdigit(*p)) p--;
805 /* Handle Exim 3 spool files */
810 #if !defined (COMPILE_UTILITY)
811 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim 3 spool file\n");
813 while (isdigit(*(--p)) || *p == ',');
817 (void)sscanf(CS p, "%d,%d", &dummy, &pno);
821 /* Handle early Exim 4 spool files */
825 #if !defined (COMPILE_UTILITY)
826 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - early Exim 4 spool file\n");
829 (void)sscanf(CS p, "%d", &pno);
832 /* Handle current format Exim 4 spool files */
838 #if !defined (COMPILE_UTILITY)
839 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - Exim standard format spoolfile\n");
842 (void)sscanf(CS p+1, "%d", &flags);
844 if ((flags & 0x01) != 0) /* one_time data exists */
847 while (isdigit(*(--p)) || *p == ',' || *p == '-');
848 (void)sscanf(CS p+1, "%d,%d", &len, &pno);
853 errors_to = string_copy_taint(p, TRUE);
857 *(--p) = 0; /* Terminate address */
858 if ((flags & 0x02) != 0) /* one_time data exists */
861 while (isdigit(*(--p)) || *p == ',' || *p == '-');
862 (void)sscanf(CS p+1, "%d,%d", &len, &dsn_flags);
867 orcpt = string_copy_taint(p, TRUE);
871 *(--p) = 0; /* Terminate address */
873 #if !defined(COMPILE_UTILITY)
875 { DEBUG(D_deliver) debug_printf("**** SPOOL_IN - No additional fields\n"); }
877 if (orcpt || dsn_flags)
878 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: <%s> orcpt: <%s> dsn_flags: 0x%x\n",
879 big_buffer, orcpt, dsn_flags);
881 DEBUG(D_deliver) debug_printf("**** SPOOL_IN - address: <%s> errorsto: <%s>\n",
882 big_buffer, errors_to);
885 recipients_list[recipients_count].address = string_copy_taint(big_buffer, TRUE);
886 recipients_list[recipients_count].pno = pno;
887 recipients_list[recipients_count].errors_to = errors_to;
888 recipients_list[recipients_count].orcpt = orcpt;
889 recipients_list[recipients_count].dsn_flags = dsn_flags;
892 /* The remainder of the spool header file contains the headers for the message,
893 separated off from the previous data by a blank line. Each header is preceded
894 by a count of its length and either a certain letter (for various identified
895 headers), space (for a miscellaneous live header) or an asterisk (for a header
896 that has been rewritten). Count the Received: headers. We read the headers
897 always, in order to check on the format of the file, but only create a header
898 list if requested to do so. */
901 if (Ufgets(big_buffer, big_buffer_size, fp) == NULL) goto SPOOL_READ_ERROR;
902 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
904 while ((n = fgetc(fp)) != EOF)
910 if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
911 if(ungetc(n, fp) == EOF || fscanf(fp, "%d%c ", &n, flag) == EOF)
912 goto SPOOL_READ_ERROR;
913 if (flag[0] != '*') message_size += n; /* Omit non-transmitted headers */
917 h = store_get(sizeof(header_line), FALSE);
921 h->text = store_get(n+1, TRUE); /* tainted */
923 if (h->type == htype_received) received_count++;
925 if (header_list) header_last->next = h;
926 else header_list = h;
929 for (i = 0; i < n; i++)
932 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
933 if (c == '\n' && h->type != htype_old) message_linecount++;
939 /* Not requiring header data, just skip through the bytes */
941 else for (i = 0; i < n; i++)
944 if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
948 /* We have successfully read the data in the header file. Update the message
949 line count by adding the body linecount to the header linecount. Close the file
950 and give a positive response. */
952 #ifndef COMPILE_UTILITY
953 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
954 body_linecount, message_linecount);
955 #endif /* COMPILE_UTILITY */
957 message_linecount += body_linecount;
960 return spool_read_OK;
963 /* There was an error reading the spool or there was missing data,
964 or there was a format error. A "read error" with no errno means an
965 unexpected EOF, which we treat as a format error. */
972 #ifndef COMPILE_UTILITY
973 DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
974 #endif /* COMPILE_UTILITY */
978 return inheader ? spool_read_hdrerror : spool_read_enverror;
983 #ifndef COMPILE_UTILITY
984 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
985 #endif /* COMPILE_UTILITY */
988 errno = ERRNO_SPOOLFORMAT;
989 return inheader? spool_read_hdrerror : spool_read_enverror;
994 /* End of spool_in.c */