src/src/spool_in.c

   1 /* $Cambridge: exim/src/src/spool_in.c,v 1.3 2004/12/22 12:05:46 ph10 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2004 */
   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 originator[64];
 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_failed = FALSE;
 254 interface_address = NULL;
 255 interface_port = 0;
 256 local_error_message = FALSE;
 257 local_scan_data = NULL;
 258 message_linecount = 0;
 259 received_protocol = NULL;
 260 received_count = 0;
 261 recipients_list = NULL;
 262 sender_address = NULL;
 263 sender_fullhost = NULL;
 264 sender_helo_name = NULL;
 265 sender_host_address = NULL;
 266 sender_host_name = NULL;
 267 sender_host_port = 0;
 268 sender_host_authenticated = NULL;
 269 sender_ident = NULL;
 270 sender_local = FALSE;
 271 sender_set_untrusted = FALSE;
 272 smtp_active_hostname = primary_hostname;
 273 tree_nonrecipients = NULL;
 274
 275 #ifdef EXPERIMENTAL_BRIGHTMAIL
 276 bmi_run = 0;
 277 bmi_verdicts = NULL;
 278 #endif
 279
 280 #ifdef SUPPORT_TLS
 281 tls_certificate_verified = FALSE;
 282 tls_cipher = NULL;
 283 tls_peerdn = NULL;
 284 #endif
 285
 286 #ifdef WITH_CONTENT_SCAN
 287 fake_reject = FALSE;
 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 if (sscanf(CS big_buffer, "%s %ld %ld", originator, &uid, &gid) != 3)
 329   goto SPOOL_FORMAT_ERROR;
 330 originator_login = string_copy(originator);
 331 originator_uid = (uid_t)uid;
 332 originator_gid = (gid_t)gid;
 333
 334 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 335 n = Ustrlen(big_buffer);
 336 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
 337   goto SPOOL_FORMAT_ERROR;
 338
 339 sender_address = store_get(n-2);
 340 Ustrncpy(sender_address, big_buffer+1, n-3);
 341 sender_address[n-3] = 0;
 342
 343 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 344 if (sscanf(CS big_buffer, "%d %d", &received_time, &warning_count) != 2)
 345   goto SPOOL_FORMAT_ERROR;
 346
 347 message_age = time(NULL) - received_time;
 348
 349 #ifndef COMPILE_UTILITY
 350 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
 351   originator_login, (long int)originator_uid, (long int)originator_gid,
 352   sender_address);
 353 #endif  /* COMPILE_UTILITY */
 354
 355 /* Now there may be a number of optional lines, each starting with "-".
 356 If you add a new setting here, make sure you set the default above. */
 357
 358 for (;;)
 359   {
 360   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 361   if (big_buffer[0] != '-') break;
 362
 363   big_buffer[Ustrlen(big_buffer) - 1] = 0;
 364   if (Ustrncmp(big_buffer, "-acl ", 5) == 0)
 365     {
 366     int index, count;
 367     if (sscanf(CS big_buffer + 5, "%d %d", &index, &count) != 2)
 368       goto SPOOL_FORMAT_ERROR;
 369     /* Ignore if index too big - might be if a later release with more
 370     variables built this spool file. */
 371     if (index < ACL_C_MAX + ACL_M_MAX)
 372       {
 373       acl_var[index] = store_get(count + 1);
 374       if (fread(acl_var[index], 1, count+1, f) < count) goto SPOOL_READ_ERROR;
 375       acl_var[index][count] = 0;
 376       }
 377     }
 378   else if (Ustrcmp(big_buffer, "-local") == 0) sender_local = TRUE;
 379   else if (Ustrcmp(big_buffer, "-localerror") == 0)
 380     local_error_message = TRUE;
 381   else if (Ustrncmp(big_buffer, "-local_scan ", 12) == 0)
 382     local_scan_data = string_copy(big_buffer + 12);
 383 #ifdef WITH_CONTENT_SCAN
 384   else if (Ustrncmp(big_buffer, "-spam_score_int ", 16) == 0)
 385     spam_score_int = string_copy(big_buffer + 16);
 386 #endif
 387 #ifdef EXPERIMENTAL_BRIGHTMAIL
 388   else if (Ustrncmp(big_buffer, "-bmi_verdicts ", 14) == 0)
 389     bmi_verdicts = string_copy(big_buffer + 14);
 390 #endif
 391   else if (Ustrcmp(big_buffer, "-host_lookup_failed") == 0)
 392     host_lookup_failed = TRUE;
 393   else if (Ustrncmp(big_buffer, "-body_linecount", 15) == 0)
 394     body_linecount = Uatoi(big_buffer + 15);
 395   else if (Ustrncmp(big_buffer, "-body_zerocount", 15) == 0)
 396     body_zerocount = Uatoi(big_buffer + 15);
 397   else if (Ustrncmp(big_buffer, "-frozen", 7) == 0)
 398     {
 399     deliver_freeze = TRUE;
 400     deliver_frozen_at = Uatoi(big_buffer + 7);
 401     }
 402   else if (Ustrcmp(big_buffer, "-allow_unqualified_recipient") == 0)
 403     allow_unqualified_recipient = TRUE;
 404   else if (Ustrcmp(big_buffer, "-allow_unqualified_sender") == 0)
 405     allow_unqualified_sender = TRUE;
 406   else if (Ustrcmp(big_buffer, "-deliver_firsttime") == 0)
 407     deliver_firsttime = TRUE;
 408   else if (Ustrcmp(big_buffer, "-manual_thaw") == 0)
 409     deliver_manual_thaw = TRUE;
 410   else if (Ustrncmp(big_buffer, "-auth_id", 8) == 0)
 411     authenticated_id = string_copy(big_buffer + 9);
 412   else if (Ustrncmp(big_buffer, "-auth_sender", 12) == 0)
 413     authenticated_sender = string_copy(big_buffer + 13);
 414   else if (Ustrncmp(big_buffer, "-sender_set_untrusted", 21) == 0)
 415     sender_set_untrusted = TRUE;
 416
 417   #ifdef SUPPORT_TLS
 418   else if (Ustrncmp(big_buffer, "-tls_certificate_verified", 25) == 0)
 419     tls_certificate_verified = TRUE;
 420   else if (Ustrncmp(big_buffer, "-tls_cipher", 11) == 0)
 421     tls_cipher = string_copy(big_buffer + 12);
 422   else if (Ustrncmp(big_buffer, "-tls_peerdn", 11) == 0)
 423     tls_peerdn = string_copy(big_buffer + 12);
 424   #endif
 425
 426   /* We now record the port number after the address, separated by a
 427   dot. For compatibility during upgrading, do nothing if there
 428   isn't a value (it gets left at zero). */
 429
 430   else if (Ustrncmp(big_buffer, "-host_address", 13) == 0)
 431     {
 432     sender_host_port = host_extract_port(big_buffer + 14);
 433     sender_host_address = string_copy(big_buffer + 14);
 434     }
 435
 436   else if (Ustrncmp(big_buffer, "-interface_address", 18) == 0)
 437     {
 438     interface_port = host_extract_port(big_buffer + 19);
 439     interface_address = string_copy(big_buffer + 19);
 440     }
 441
 442   else if (Ustrncmp(big_buffer, "-active_hostname", 16) == 0)
 443     smtp_active_hostname = string_copy(big_buffer + 17);
 444   else if (Ustrncmp(big_buffer, "-host_auth", 10) == 0)
 445     sender_host_authenticated = string_copy(big_buffer + 11);
 446   else if (Ustrncmp(big_buffer, "-host_name", 10) == 0)
 447     sender_host_name = string_copy(big_buffer + 11);
 448   else if (Ustrncmp(big_buffer, "-helo_name", 10) == 0)
 449     sender_helo_name = string_copy(big_buffer + 11);
 450   else if (Ustrncmp(big_buffer, "-ident", 6) == 0)
 451     sender_ident = string_copy(big_buffer + 7);
 452   else if (Ustrncmp(big_buffer, "-received_protocol", 18) == 0)
 453     received_protocol = string_copy(big_buffer + 19);
 454   else if (Ustrncmp(big_buffer, "-N", 2) == 0)
 455     dont_deliver = TRUE;
 456
 457   /* To allow new versions of Exim that add additional flags to interwork
 458   with older versions that do not understand them, just ignore any flagged
 459   lines that we don't recognize. Otherwise it wouldn't be possible to back
 460   off a new version that left new-style flags written on the spool. That's
 461   why the following line is commented out. */
 462
 463     /* else goto SPOOL_FORMAT_ERROR; */
 464   }
 465
 466 /* Build sender_fullhost if required */
 467
 468 #ifndef COMPILE_UTILITY
 469 host_build_sender_fullhost();
 470 #endif  /* COMPILE_UTILITY */
 471
 472 #ifndef COMPILE_UTILITY
 473 DEBUG(D_deliver)
 474   debug_printf("sender_local=%d ident=%s\n", sender_local,
 475     (sender_ident == NULL)? US"unset" : sender_ident);
 476 #endif  /* COMPILE_UTILITY */
 477
 478 /* We now have the tree of addresses NOT to deliver to, or a line
 479 containing "XX", indicating no tree. */
 480
 481 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
 482   !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
 483     goto SPOOL_FORMAT_ERROR;
 484
 485 #ifndef COMPILE_UTILITY
 486 DEBUG(D_deliver)
 487   {
 488   debug_printf("Non-recipients:\n");
 489   debug_print_tree(tree_nonrecipients);
 490   }
 491 #endif  /* COMPILE_UTILITY */
 492
 493 /* After reading the tree, the next line has not yet been read into the
 494 buffer. It contains the count of recipients which follow on separate lines. */
 495
 496 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 497 if (sscanf(CS big_buffer, "%d", &rcount) != 1) goto SPOOL_FORMAT_ERROR;
 498
 499 #ifndef COMPILE_UTILITY
 500 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
 501 #endif  /* COMPILE_UTILITY */
 502
 503 recipients_list_max = rcount;
 504 recipients_list = store_get(rcount * sizeof(recipient_item));
 505
 506 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
 507   {
 508   int nn;
 509   int pno = -1;
 510   uschar *errors_to = NULL;
 511   uschar *p;
 512
 513   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 514   nn = Ustrlen(big_buffer);
 515   if (nn < 2) goto SPOOL_FORMAT_ERROR;
 516
 517   /* Remove the newline; this terminates the address if there is no additional
 518   data on the line. */
 519
 520   p = big_buffer + nn - 1;
 521   *p-- = 0;
 522
 523   /* Look back from the end of the line for digits and special terminators.
 524   Since an address must end with a domain, we can tell that extra data is
 525   present by the presence of the terminator, which is always some character
 526   that cannot exist in a domain. (If I'd thought of the need for additional
 527   data early on, I'd have put it at the start, with the address at the end. As
 528   it is, we have to operate backwards. Addresses are permitted to contain
 529   spaces, you see.)
 530
 531   This code has to cope with various versions of this data that have evolved
 532   over time. In all cases, the line might just contain an address, with no
 533   additional data. Otherwise, the possibilities are as follows:
 534
 535   Exim 3 type:       <address><space><digits>,<digits>,<digits>
 536
 537     The second set of digits is the parent number for one_time addresses. The
 538     other values were remnants of earlier experiments that were abandoned.
 539
 540   Exim 4 first type: <address><space><digits>
 541
 542     The digits are the parent number for one_time addresses.
 543
 544   Exim 4 new type:   <address><space><data>#<type bits>
 545
 546     The type bits indicate what the contents of the data are.
 547
 548     Bit 01 indicates that, reading from right to left, the data
 549       ends with <errors_to address><space><len>,<pno> where pno is
 550       the parent number for one_time addresses, and len is the length
 551       of the errors_to address (zero meaning none).
 552    */
 553
 554   while (isdigit(*p)) p--;
 555
 556   /* Handle Exim 3 spool files */
 557
 558   if (*p == ',')
 559     {
 560     int dummy;
 561     while (isdigit(*(--p)) || *p == ',');
 562     if (*p == ' ')
 563       {
 564       *p++ = 0;
 565       sscanf(CS p, "%d,%d", &dummy, &pno);
 566       }
 567     }
 568
 569   /* Handle early Exim 4 spool files */
 570
 571   else if (*p == ' ')
 572     {
 573     *p++ = 0;
 574     sscanf(CS p, "%d", &pno);
 575     }
 576
 577   /* Handle current format Exim 4 spool files */
 578
 579   else if (*p == '#')
 580     {
 581     int flags;
 582     sscanf(CS p+1, "%d", &flags);
 583
 584     if ((flags & 0x01) != 0)      /* one_time data exists */
 585       {
 586       int len;
 587       while (isdigit(*(--p)) || *p == ',' || *p == '-');
 588       sscanf(CS p+1, "%d,%d", &len, &pno);
 589       *p = 0;
 590       if (len > 0)
 591         {
 592         p -= len;
 593         errors_to = string_copy(p);
 594         }
 595       }
 596
 597     *(--p) = 0;   /* Terminate address */
 598     }
 599
 600   recipients_list[recipients_count].address = string_copy(big_buffer);
 601   recipients_list[recipients_count].pno = pno;
 602   recipients_list[recipients_count].errors_to = errors_to;
 603   }
 604
 605 /* The remainder of the spool header file contains the headers for the message,
 606 separated off from the previous data by a blank line. Each header is preceded
 607 by a count of its length and either a certain letter (for various identified
 608 headers), space (for a miscellaneous live header) or an asterisk (for a header
 609 that has been rewritten). Count the Received: headers. We read the headers
 610 always, in order to check on the format of the file, but only create a header
 611 list if requested to do so. */
 612
 613 inheader = TRUE;
 614 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 615 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
 616
 617 while ((n = fgetc(f)) != EOF)
 618   {
 619   header_line *h;
 620   uschar flag[4];
 621   int i;
 622
 623   if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
 624   ungetc(n, f);
 625   fscanf(f, "%d%c ", &n, flag);
 626   if (flag[0] != '*') message_size += n;  /* Omit non-transmitted headers */
 627
 628   if (read_headers)
 629     {
 630     h = store_get(sizeof(header_line));
 631     h->next = NULL;
 632     h->type = flag[0];
 633     h->slen = n;
 634     h->text = store_get(n+1);
 635
 636     if (h->type == htype_received) received_count++;
 637
 638     if (header_list == NULL) header_list = h;
 639       else header_last->next = h;
 640     header_last = h;
 641
 642     for (i = 0; i < n; i++)
 643       {
 644       int c = fgetc(f);
 645       if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 646       if (c == '\n' && h->type != htype_old) message_linecount++;
 647       h->text[i] = c;
 648       }
 649     h->text[i] = 0;
 650     }
 651
 652   /* Not requiring header data, just skip through the bytes */
 653
 654   else for (i = 0; i < n; i++)
 655     {
 656     int c = fgetc(f);
 657     if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 658     }
 659   }
 660
 661 /* We have successfully read the data in the header file. Update the message
 662 line count by adding the body linecount to the header linecount. Close the file
 663 and give a positive response. */
 664
 665 #ifndef COMPILE_UTILITY
 666 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
 667   body_linecount, message_linecount);
 668 #endif  /* COMPILE_UTILITY */
 669
 670 message_linecount += body_linecount;
 671
 672 fclose(f);
 673 return spool_read_OK;
 674
 675
 676 /* There was an error reading the spool or there was missing data,
 677 or there was a format error. A "read error" with no errno means an
 678 unexpected EOF, which we treat as a format error. */
 679
 680 SPOOL_READ_ERROR:
 681 if (errno != 0)
 682   {
 683   n = errno;
 684
 685   #ifndef COMPILE_UTILITY
 686   DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
 687   #endif  /* COMPILE_UTILITY */
 688
 689   fclose(f);
 690   errno = n;
 691   return inheader? spool_read_hdrerror : spool_read_enverror;
 692   }
 693
 694 SPOOL_FORMAT_ERROR:
 695
 696 #ifndef COMPILE_UTILITY
 697 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
 698 #endif  /* COMPILE_UTILITY */
 699
 700 fclose(f);
 701 errno = ERRNO_SPOOLFORMAT;
 702 return inheader? spool_read_hdrerror : spool_read_enverror;
 703 }
 704
 705 /* End of spool_in.c */