src/src/spool_in.c

   1 /* $Cambridge: exim/src/src/spool_in.c,v 1.8 2005/02/17 11:58:26 ph10 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2005 */
   8 /* See the file NOTICE for conditions of use and distribution. */
   9
  10 /* Functions for reading spool files. When compiling for a utility (eximon),
  11 not all are needed, and some functionality can be cut out. */
  12
  13
  14 #include "exim.h"
  15
  16
  17
  18 #ifndef COMPILE_UTILITY
  19 /*************************************************
  20 *           Open and lock data file              *
  21 *************************************************/
  22
  23 /* The data file is the one that is used for locking, because the header file
  24 can get replaced during delivery because of header rewriting. The file has
  25 to opened with write access so that we can get an exclusive lock, but in
  26 fact it won't be written to. Just in case there's a major disaster (e.g.
  27 overwriting some other file descriptor with the value of this one), open it
  28 with append.
  29
  30 Argument: the id of the message
  31 Returns:  TRUE if file successfully opened and locked
  32
  33 Side effect: deliver_datafile is set to the fd of the open file.
  34 */
  35
  36 BOOL
  37 spool_open_datafile(uschar *id)
  38 {
  39 int i;
  40 struct stat statbuf;
  41 flock_t lock_data;
  42 uschar spoolname[256];
  43
  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
  49 splitting state. */
  50
  51 for (i = 0; i < 2; i++)
  52   {
  53   int save_errno;
  54   message_subdir[0] = (split_spool_directory == (i == 0))? id[5] : 0;
  55   sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
  56   deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
  57   if (deliver_datafile >= 0) break;
  58   save_errno = errno;
  59   if (errno == ENOENT)
  60     {
  61     if (i == 0) continue;
  62     if (!queue_running)
  63       log_write(0, LOG_MAIN, "Spool file %s-D not found", id);
  64     }
  65   else log_write(0, LOG_MAIN, "Spool error for %s: %s", spoolname,
  66     strerror(errno));
  67   errno = save_errno;
  68   return FALSE;
  69   }
  70
  71 /* File is open and message_subdir is set. Set the close-on-exec flag, and lock
  72 the file. We lock only the first line of the file (containing the message ID)
  73 because this apparently is needed for running Exim under Cygwin. If the entire
  74 file is locked in one process, a sub-process cannot access it, even when passed
  75 an open file descriptor (at least, I think that's the Cygwin story). On real
  76 Unix systems it doesn't make any difference as long as Exim is consistent in
  77 what it locks. */
  78
  79 fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
  80   FD_CLOEXEC);
  81
  82 lock_data.l_type = F_WRLCK;
  83 lock_data.l_whence = SEEK_SET;
  84 lock_data.l_start = 0;
  85 lock_data.l_len = SPOOL_DATA_START_OFFSET;
  86
  87 if (fcntl(deliver_datafile, F_SETLK, &lock_data) < 0)
  88   {
  89   log_write(L_skip_delivery,
  90             LOG_MAIN,
  91             "Spool file is locked (another process is handling this message)");
  92   close(deliver_datafile);
  93   deliver_datafile = -1;
  94   errno = 0;
  95   return FALSE;
  96   }
  97
  98 /* Get the size of the data; don't include the leading filename line
  99 in the count, but add one for the newline before the data. */
 100
 101 if (fstat(deliver_datafile, &statbuf) == 0)
 102   {
 103   message_body_size = statbuf.st_size - SPOOL_DATA_START_OFFSET;
 104   message_size = message_body_size + 1;
 105   }
 106
 107 return TRUE;
 108 }
 109 #endif  /* COMPILE_UTILITY */
 110
 111
 112
 113 /*************************************************
 114 *    Read non-recipients tree from spool file    *
 115 *************************************************/
 116
 117 /* The tree of non-recipients is written to the spool file in a form that
 118 makes it easy to read back into a tree. The format is as follows:
 119
 120    . Each node is preceded by two letter(Y/N) indicating whether it has left
 121      or right children. There's one space after the two flags, before the name.
 122
 123    . The left subtree (if any) then follows, then the right subtree (if any).
 124
 125 This function is entered with the next input line in the buffer. Note we must
 126 save the right flag before recursing with the same buffer.
 127
 128 Once the tree is read, we re-construct the balance fields by scanning the tree.
 129 I forgot to write them out originally, and the compatible fix is to do it this
 130 way. This initial local recursing function does the necessary.
 131
 132 Arguments:
 133   node      tree node
 134
 135 Returns:    maximum depth below the node, including the node itself
 136 */
 137
 138 static int
 139 count_below(tree_node *node)
 140 {
 141 int nleft, nright;
 142 if (node == NULL) return 0;
 143 nleft = count_below(node->left);
 144 nright = count_below(node->right);
 145 node->balance = (nleft > nright)? 1 : ((nright > nleft)? 2 : 0);
 146 return 1 + ((nleft > nright)? nleft : nright);
 147 }
 148
 149 /* This is the real function...
 150
 151 Arguments:
 152   connect      pointer to the root of the tree
 153   f            FILE to read data from
 154   buffer       contains next input line; further lines read into it
 155   buffer_size  size of the buffer
 156
 157 Returns:       FALSE on format error
 158 */
 159
 160 static BOOL
 161 read_nonrecipients_tree(tree_node **connect, FILE *f, uschar *buffer,
 162   int buffer_size)
 163 {
 164 tree_node *node;
 165 int n = Ustrlen(buffer);
 166 BOOL right = buffer[1] == 'Y';
 167
 168 if (n < 5) return FALSE;    /* malformed line */
 169 buffer[n-1] = 0;            /* Remove \n */
 170 node = store_get(sizeof(tree_node) + n - 3);
 171 *connect = node;
 172 Ustrcpy(node->name, buffer + 3);
 173 node->data.ptr = NULL;
 174
 175 if (buffer[0] == 'Y')
 176   {
 177   if (Ufgets(buffer, buffer_size, f) == NULL ||
 178     !read_nonrecipients_tree(&node->left, f, buffer, buffer_size))
 179       return FALSE;
 180   }
 181 else node->left = NULL;
 182
 183 if (right)
 184   {
 185   if (Ufgets(buffer, buffer_size, f) == NULL ||
 186     !read_nonrecipients_tree(&node->right, f, buffer, buffer_size))
 187       return FALSE;
 188   }
 189 else node->right = NULL;
 190
 191 (void) count_below(*connect);
 192 return TRUE;
 193 }
 194
 195
 196
 197
 198 /*************************************************
 199 *             Read spool header file             *
 200 *************************************************/
 201
 202 /* This function reads a spool header file and places the data into the
 203 appropriate global variables. The header portion is always read, but header
 204 structures are built only if read_headers is set true. It isn't, for example,
 205 while generating -bp output.
 206
 207 It may be possible for blocks of nulls (binary zeroes) to get written on the
 208 end of a file if there is a system crash during writing. It was observed on an
 209 earlier version of Exim that omitted to fsync() the files - this is thought to
 210 have been the cause of that incident, but in any case, this code must be robust
 211 against such an event, and if such a file is encountered, it must be treated as
 212 malformed.
 213
 214 Arguments:
 215   name          name of the header file, including the -H
 216   read_headers  TRUE if in-store header structures are to be built
 217   subdir_set    TRUE is message_subdir is already set
 218
 219 Returns:        spool_read_OK        success
 220                 spool_read_notopen   open failed
 221                 spool_read_enverror  error in the envelope portion
 222                 spool_read_hdrdrror  error in the header portion
 223 */
 224
 225 int
 226 spool_read_header(uschar *name, BOOL read_headers, BOOL subdir_set)
 227 {
 228 FILE *f = NULL;
 229 int n;
 230 int rcount = 0;
 231 long int uid, gid;
 232 BOOL inheader = FALSE;
 233 uschar *p;
 234
 235 /* Reset all the global variables to their default values. However, there is
 236 one exception. DO NOT change the default value of dont_deliver, because it may
 237 be forced by an external setting. */
 238
 239 for (n = 0; n < ACL_C_MAX + ACL_M_MAX; n++) acl_var[n] = NULL;
 240
 241 authenticated_id = NULL;
 242 authenticated_sender = NULL;
 243 allow_unqualified_recipient = FALSE;
 244 allow_unqualified_sender = FALSE;
 245 body_linecount = 0;
 246 body_zerocount = 0;
 247 deliver_firsttime = FALSE;
 248 deliver_freeze = FALSE;
 249 deliver_frozen_at = 0;
 250 deliver_manual_thaw = FALSE;
 251 /* dont_deliver must NOT be reset */
 252 header_list = header_last = NULL;
 253 host_lookup_deferred = FALSE;
 254 host_lookup_failed = FALSE;
 255 interface_address = NULL;
 256 interface_port = 0;
 257 local_error_message = FALSE;
 258 local_scan_data = NULL;
 259 message_linecount = 0;
 260 received_protocol = NULL;
 261 received_count = 0;
 262 recipients_list = NULL;
 263 sender_address = NULL;
 264 sender_fullhost = NULL;
 265 sender_helo_name = NULL;
 266 sender_host_address = NULL;
 267 sender_host_name = NULL;
 268 sender_host_port = 0;
 269 sender_host_authenticated = NULL;
 270 sender_ident = NULL;
 271 sender_local = FALSE;
 272 sender_set_untrusted = FALSE;
 273 smtp_active_hostname = primary_hostname;
 274 tree_nonrecipients = NULL;
 275
 276 #ifdef EXPERIMENTAL_BRIGHTMAIL
 277 bmi_run = 0;
 278 bmi_verdicts = NULL;
 279 #endif
 280
 281 #ifdef SUPPORT_TLS
 282 tls_certificate_verified = FALSE;
 283 tls_cipher = NULL;
 284 tls_peerdn = NULL;
 285 #endif
 286
 287 #ifdef WITH_CONTENT_SCAN
 288 spam_score_int = NULL;
 289 #endif
 290
 291 /* Generate the full name and open the file. If message_subdir is already
 292 set, just look in the given directory. Otherwise, look in both the split
 293 and unsplit directories, as for the data file above. */
 294
 295 for (n = 0; n < 2; n++)
 296   {
 297   if (!subdir_set)
 298     message_subdir[0] = (split_spool_directory == (n == 0))? name[5] : 0;
 299   sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
 300     name);
 301   f = Ufopen(big_buffer, "rb");
 302   if (f != NULL) break;
 303   if (n != 0 || subdir_set || errno != ENOENT) return spool_read_notopen;
 304   }
 305
 306 errno = 0;
 307
 308 #ifndef COMPILE_UTILITY
 309 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
 310 #endif  /* COMPILE_UTILITY */
 311
 312 /* The first line of a spool file contains the message id followed by -H (i.e.
 313 the file name), in order to make the file self-identifying. */
 314
 315 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 316 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
 317     Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
 318   goto SPOOL_FORMAT_ERROR;
 319
 320 /* The next three lines in the header file are in a fixed format. The first
 321 contains the login, uid, and gid of the user who caused the file to be written.
 322 The second contains the mail address of the message's sender, enclosed in <>.
 323 The third contains the time the message was received, and the number of warning
 324 messages for delivery delays that have been sent. */
 325
 326 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 327
 328 p = big_buffer + Ustrlen(big_buffer);
 329 while (p > big_buffer && isspace(p[-1])) p--;
 330 *p = 0;
 331 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 332 while (p > big_buffer && isdigit(p[-1])) p--;
 333 gid = Uatoi(p);
 334 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 335 *p = 0;
 336 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 337 while (p > big_buffer && isdigit(p[-1])) p--;
 338 uid = Uatoi(p);
 339 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 340 *p = 0;
 341
 342 originator_login = string_copy(big_buffer);
 343 originator_uid = (uid_t)uid;
 344 originator_gid = (gid_t)gid;
 345
 346 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 347 n = Ustrlen(big_buffer);
 348 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
 349   goto SPOOL_FORMAT_ERROR;
 350
 351 sender_address = store_get(n-2);
 352 Ustrncpy(sender_address, big_buffer+1, n-3);
 353 sender_address[n-3] = 0;
 354
 355 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 356 if (sscanf(CS big_buffer, "%d %d", &received_time, &warning_count) != 2)
 357   goto SPOOL_FORMAT_ERROR;
 358
 359 message_age = time(NULL) - received_time;
 360
 361 #ifndef COMPILE_UTILITY
 362 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
 363   originator_login, (long int)originator_uid, (long int)originator_gid,
 364   sender_address);
 365 #endif  /* COMPILE_UTILITY */
 366
 367 /* Now there may be a number of optional lines, each starting with "-".
 368 If you add a new setting here, make sure you set the default above. */
 369
 370 for (;;)
 371   {
 372   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 373   if (big_buffer[0] != '-') break;
 374
 375   big_buffer[Ustrlen(big_buffer) - 1] = 0;
 376   if (Ustrncmp(big_buffer, "-acl ", 5) == 0)
 377     {
 378     int index, count;
 379     if (sscanf(CS big_buffer + 5, "%d %d", &index, &count) != 2)
 380       goto SPOOL_FORMAT_ERROR;
 381     /* Ignore if index too big - might be if a later release with more
 382     variables built this spool file. */
 383     if (index < ACL_C_MAX + ACL_M_MAX)
 384       {
 385       acl_var[index] = store_get(count + 1);
 386       if (fread(acl_var[index], 1, count+1, f) < count) goto SPOOL_READ_ERROR;
 387       acl_var[index][count] = 0;
 388       }
 389     }
 390   else if (Ustrcmp(big_buffer, "-local") == 0) sender_local = TRUE;
 391   else if (Ustrcmp(big_buffer, "-localerror") == 0)
 392     local_error_message = TRUE;
 393   else if (Ustrncmp(big_buffer, "-local_scan ", 12) == 0)
 394     local_scan_data = string_copy(big_buffer + 12);
 395 #ifdef WITH_CONTENT_SCAN
 396   else if (Ustrncmp(big_buffer, "-spam_score_int ", 16) == 0)
 397     spam_score_int = string_copy(big_buffer + 16);
 398 #endif
 399 #ifdef EXPERIMENTAL_BRIGHTMAIL
 400   else if (Ustrncmp(big_buffer, "-bmi_verdicts ", 14) == 0)
 401     bmi_verdicts = string_copy(big_buffer + 14);
 402 #endif
 403   else if (Ustrcmp(big_buffer, "-host_lookup_deferred") == 0)
 404     host_lookup_deferred = TRUE;
 405   else if (Ustrcmp(big_buffer, "-host_lookup_failed") == 0)
 406     host_lookup_failed = TRUE;
 407   else if (Ustrncmp(big_buffer, "-body_linecount", 15) == 0)
 408     body_linecount = Uatoi(big_buffer + 15);
 409   else if (Ustrncmp(big_buffer, "-body_zerocount", 15) == 0)
 410     body_zerocount = Uatoi(big_buffer + 15);
 411   else if (Ustrncmp(big_buffer, "-frozen", 7) == 0)
 412     {
 413     deliver_freeze = TRUE;
 414     deliver_frozen_at = Uatoi(big_buffer + 7);
 415     }
 416   else if (Ustrcmp(big_buffer, "-allow_unqualified_recipient") == 0)
 417     allow_unqualified_recipient = TRUE;
 418   else if (Ustrcmp(big_buffer, "-allow_unqualified_sender") == 0)
 419     allow_unqualified_sender = TRUE;
 420   else if (Ustrcmp(big_buffer, "-deliver_firsttime") == 0)
 421     deliver_firsttime = TRUE;
 422   else if (Ustrcmp(big_buffer, "-manual_thaw") == 0)
 423     deliver_manual_thaw = TRUE;
 424   else if (Ustrncmp(big_buffer, "-auth_id", 8) == 0)
 425     authenticated_id = string_copy(big_buffer + 9);
 426   else if (Ustrncmp(big_buffer, "-auth_sender", 12) == 0)
 427     authenticated_sender = string_copy(big_buffer + 13);
 428   else if (Ustrncmp(big_buffer, "-sender_set_untrusted", 21) == 0)
 429     sender_set_untrusted = TRUE;
 430
 431   #ifdef SUPPORT_TLS
 432   else if (Ustrncmp(big_buffer, "-tls_certificate_verified", 25) == 0)
 433     tls_certificate_verified = TRUE;
 434   else if (Ustrncmp(big_buffer, "-tls_cipher", 11) == 0)
 435     tls_cipher = string_copy(big_buffer + 12);
 436   else if (Ustrncmp(big_buffer, "-tls_peerdn", 11) == 0)
 437     tls_peerdn = string_copy(big_buffer + 12);
 438   #endif
 439
 440   /* We now record the port number after the address, separated by a
 441   dot. For compatibility during upgrading, do nothing if there
 442   isn't a value (it gets left at zero). */
 443
 444   else if (Ustrncmp(big_buffer, "-host_address", 13) == 0)
 445     {
 446     sender_host_port = host_extract_port(big_buffer + 14);
 447     sender_host_address = string_copy(big_buffer + 14);
 448     }
 449
 450   else if (Ustrncmp(big_buffer, "-interface_address", 18) == 0)
 451     {
 452     interface_port = host_extract_port(big_buffer + 19);
 453     interface_address = string_copy(big_buffer + 19);
 454     }
 455
 456   else if (Ustrncmp(big_buffer, "-active_hostname", 16) == 0)
 457     smtp_active_hostname = string_copy(big_buffer + 17);
 458   else if (Ustrncmp(big_buffer, "-host_auth", 10) == 0)
 459     sender_host_authenticated = string_copy(big_buffer + 11);
 460   else if (Ustrncmp(big_buffer, "-host_name", 10) == 0)
 461     sender_host_name = string_copy(big_buffer + 11);
 462   else if (Ustrncmp(big_buffer, "-helo_name", 10) == 0)
 463     sender_helo_name = string_copy(big_buffer + 11);
 464   else if (Ustrncmp(big_buffer, "-ident", 6) == 0)
 465     sender_ident = string_copy(big_buffer + 7);
 466   else if (Ustrncmp(big_buffer, "-received_protocol", 18) == 0)
 467     received_protocol = string_copy(big_buffer + 19);
 468   else if (Ustrncmp(big_buffer, "-N", 2) == 0)
 469     dont_deliver = TRUE;
 470
 471   /* To allow new versions of Exim that add additional flags to interwork
 472   with older versions that do not understand them, just ignore any flagged
 473   lines that we don't recognize. Otherwise it wouldn't be possible to back
 474   off a new version that left new-style flags written on the spool. That's
 475   why the following line is commented out. */
 476
 477     /* else goto SPOOL_FORMAT_ERROR; */
 478   }
 479
 480 /* Build sender_fullhost if required */
 481
 482 #ifndef COMPILE_UTILITY
 483 host_build_sender_fullhost();
 484 #endif  /* COMPILE_UTILITY */
 485
 486 #ifndef COMPILE_UTILITY
 487 DEBUG(D_deliver)
 488   debug_printf("sender_local=%d ident=%s\n", sender_local,
 489     (sender_ident == NULL)? US"unset" : sender_ident);
 490 #endif  /* COMPILE_UTILITY */
 491
 492 /* We now have the tree of addresses NOT to deliver to, or a line
 493 containing "XX", indicating no tree. */
 494
 495 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
 496   !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
 497     goto SPOOL_FORMAT_ERROR;
 498
 499 #ifndef COMPILE_UTILITY
 500 DEBUG(D_deliver)
 501   {
 502   debug_printf("Non-recipients:\n");
 503   debug_print_tree(tree_nonrecipients);
 504   }
 505 #endif  /* COMPILE_UTILITY */
 506
 507 /* After reading the tree, the next line has not yet been read into the
 508 buffer. It contains the count of recipients which follow on separate lines. */
 509
 510 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 511 if (sscanf(CS big_buffer, "%d", &rcount) != 1) goto SPOOL_FORMAT_ERROR;
 512
 513 #ifndef COMPILE_UTILITY
 514 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
 515 #endif  /* COMPILE_UTILITY */
 516
 517 recipients_list_max = rcount;
 518 recipients_list = store_get(rcount * sizeof(recipient_item));
 519
 520 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
 521   {
 522   int nn;
 523   int pno = -1;
 524   uschar *errors_to = NULL;
 525   uschar *p;
 526
 527   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 528   nn = Ustrlen(big_buffer);
 529   if (nn < 2) goto SPOOL_FORMAT_ERROR;
 530
 531   /* Remove the newline; this terminates the address if there is no additional
 532   data on the line. */
 533
 534   p = big_buffer + nn - 1;
 535   *p-- = 0;
 536
 537   /* Look back from the end of the line for digits and special terminators.
 538   Since an address must end with a domain, we can tell that extra data is
 539   present by the presence of the terminator, which is always some character
 540   that cannot exist in a domain. (If I'd thought of the need for additional
 541   data early on, I'd have put it at the start, with the address at the end. As
 542   it is, we have to operate backwards. Addresses are permitted to contain
 543   spaces, you see.)
 544
 545   This code has to cope with various versions of this data that have evolved
 546   over time. In all cases, the line might just contain an address, with no
 547   additional data. Otherwise, the possibilities are as follows:
 548
 549   Exim 3 type:       <address><space><digits>,<digits>,<digits>
 550
 551     The second set of digits is the parent number for one_time addresses. The
 552     other values were remnants of earlier experiments that were abandoned.
 553
 554   Exim 4 first type: <address><space><digits>
 555
 556     The digits are the parent number for one_time addresses.
 557
 558   Exim 4 new type:   <address><space><data>#<type bits>
 559
 560     The type bits indicate what the contents of the data are.
 561
 562     Bit 01 indicates that, reading from right to left, the data
 563       ends with <errors_to address><space><len>,<pno> where pno is
 564       the parent number for one_time addresses, and len is the length
 565       of the errors_to address (zero meaning none).
 566    */
 567
 568   while (isdigit(*p)) p--;
 569
 570   /* Handle Exim 3 spool files */
 571
 572   if (*p == ',')
 573     {
 574     int dummy;
 575     while (isdigit(*(--p)) || *p == ',');
 576     if (*p == ' ')
 577       {
 578       *p++ = 0;
 579       sscanf(CS p, "%d,%d", &dummy, &pno);
 580       }
 581     }
 582
 583   /* Handle early Exim 4 spool files */
 584
 585   else if (*p == ' ')
 586     {
 587     *p++ = 0;
 588     sscanf(CS p, "%d", &pno);
 589     }
 590
 591   /* Handle current format Exim 4 spool files */
 592
 593   else if (*p == '#')
 594     {
 595     int flags;
 596     sscanf(CS p+1, "%d", &flags);
 597
 598     if ((flags & 0x01) != 0)      /* one_time data exists */
 599       {
 600       int len;
 601       while (isdigit(*(--p)) || *p == ',' || *p == '-');
 602       sscanf(CS p+1, "%d,%d", &len, &pno);
 603       *p = 0;
 604       if (len > 0)
 605         {
 606         p -= len;
 607         errors_to = string_copy(p);
 608         }
 609       }
 610
 611     *(--p) = 0;   /* Terminate address */
 612     }
 613
 614   recipients_list[recipients_count].address = string_copy(big_buffer);
 615   recipients_list[recipients_count].pno = pno;
 616   recipients_list[recipients_count].errors_to = errors_to;
 617   }
 618
 619 /* The remainder of the spool header file contains the headers for the message,
 620 separated off from the previous data by a blank line. Each header is preceded
 621 by a count of its length and either a certain letter (for various identified
 622 headers), space (for a miscellaneous live header) or an asterisk (for a header
 623 that has been rewritten). Count the Received: headers. We read the headers
 624 always, in order to check on the format of the file, but only create a header
 625 list if requested to do so. */
 626
 627 inheader = TRUE;
 628 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 629 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
 630
 631 while ((n = fgetc(f)) != EOF)
 632   {
 633   header_line *h;
 634   uschar flag[4];
 635   int i;
 636
 637   if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
 638   ungetc(n, f);
 639   fscanf(f, "%d%c ", &n, flag);
 640   if (flag[0] != '*') message_size += n;  /* Omit non-transmitted headers */
 641
 642   if (read_headers)
 643     {
 644     h = store_get(sizeof(header_line));
 645     h->next = NULL;
 646     h->type = flag[0];
 647     h->slen = n;
 648     h->text = store_get(n+1);
 649
 650     if (h->type == htype_received) received_count++;
 651
 652     if (header_list == NULL) header_list = h;
 653       else header_last->next = h;
 654     header_last = h;
 655
 656     for (i = 0; i < n; i++)
 657       {
 658       int c = fgetc(f);
 659       if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 660       if (c == '\n' && h->type != htype_old) message_linecount++;
 661       h->text[i] = c;
 662       }
 663     h->text[i] = 0;
 664     }
 665
 666   /* Not requiring header data, just skip through the bytes */
 667
 668   else for (i = 0; i < n; i++)
 669     {
 670     int c = fgetc(f);
 671     if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 672     }
 673   }
 674
 675 /* We have successfully read the data in the header file. Update the message
 676 line count by adding the body linecount to the header linecount. Close the file
 677 and give a positive response. */
 678
 679 #ifndef COMPILE_UTILITY
 680 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
 681   body_linecount, message_linecount);
 682 #endif  /* COMPILE_UTILITY */
 683
 684 message_linecount += body_linecount;
 685
 686 fclose(f);
 687 return spool_read_OK;
 688
 689
 690 /* There was an error reading the spool or there was missing data,
 691 or there was a format error. A "read error" with no errno means an
 692 unexpected EOF, which we treat as a format error. */
 693
 694 SPOOL_READ_ERROR:
 695 if (errno != 0)
 696   {
 697   n = errno;
 698
 699   #ifndef COMPILE_UTILITY
 700   DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
 701   #endif  /* COMPILE_UTILITY */
 702
 703   fclose(f);
 704   errno = n;
 705   return inheader? spool_read_hdrerror : spool_read_enverror;
 706   }
 707
 708 SPOOL_FORMAT_ERROR:
 709
 710 #ifndef COMPILE_UTILITY
 711 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
 712 #endif  /* COMPILE_UTILITY */
 713
 714 fclose(f);
 715 errno = ERRNO_SPOOLFORMAT;
 716 return inheader? spool_read_hdrerror : spool_read_enverror;
 717 }
 718
 719 /* End of spool_in.c */