src/src/spool_in.c

   1 /* $Cambridge: exim/src/src/spool_in.c,v 1.9 2005/03/08 15:32:02 tom 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 EXPERIMENTAL_DOMAINKEYS
 282 dk_do_verify = 0;
 283 #endif
 284
 285 #ifdef SUPPORT_TLS
 286 tls_certificate_verified = FALSE;
 287 tls_cipher = NULL;
 288 tls_peerdn = NULL;
 289 #endif
 290
 291 #ifdef WITH_CONTENT_SCAN
 292 spam_score_int = NULL;
 293 #endif
 294
 295 /* Generate the full name and open the file. If message_subdir is already
 296 set, just look in the given directory. Otherwise, look in both the split
 297 and unsplit directories, as for the data file above. */
 298
 299 for (n = 0; n < 2; n++)
 300   {
 301   if (!subdir_set)
 302     message_subdir[0] = (split_spool_directory == (n == 0))? name[5] : 0;
 303   sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
 304     name);
 305   f = Ufopen(big_buffer, "rb");
 306   if (f != NULL) break;
 307   if (n != 0 || subdir_set || errno != ENOENT) return spool_read_notopen;
 308   }
 309
 310 errno = 0;
 311
 312 #ifndef COMPILE_UTILITY
 313 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
 314 #endif  /* COMPILE_UTILITY */
 315
 316 /* The first line of a spool file contains the message id followed by -H (i.e.
 317 the file name), in order to make the file self-identifying. */
 318
 319 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 320 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
 321     Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
 322   goto SPOOL_FORMAT_ERROR;
 323
 324 /* The next three lines in the header file are in a fixed format. The first
 325 contains the login, uid, and gid of the user who caused the file to be written.
 326 The second contains the mail address of the message's sender, enclosed in <>.
 327 The third contains the time the message was received, and the number of warning
 328 messages for delivery delays that have been sent. */
 329
 330 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 331
 332 p = big_buffer + Ustrlen(big_buffer);
 333 while (p > big_buffer && isspace(p[-1])) p--;
 334 *p = 0;
 335 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 336 while (p > big_buffer && isdigit(p[-1])) p--;
 337 gid = Uatoi(p);
 338 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 339 *p = 0;
 340 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 341 while (p > big_buffer && isdigit(p[-1])) p--;
 342 uid = Uatoi(p);
 343 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 344 *p = 0;
 345
 346 originator_login = string_copy(big_buffer);
 347 originator_uid = (uid_t)uid;
 348 originator_gid = (gid_t)gid;
 349
 350 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 351 n = Ustrlen(big_buffer);
 352 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
 353   goto SPOOL_FORMAT_ERROR;
 354
 355 sender_address = store_get(n-2);
 356 Ustrncpy(sender_address, big_buffer+1, n-3);
 357 sender_address[n-3] = 0;
 358
 359 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 360 if (sscanf(CS big_buffer, "%d %d", &received_time, &warning_count) != 2)
 361   goto SPOOL_FORMAT_ERROR;
 362
 363 message_age = time(NULL) - received_time;
 364
 365 #ifndef COMPILE_UTILITY
 366 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
 367   originator_login, (long int)originator_uid, (long int)originator_gid,
 368   sender_address);
 369 #endif  /* COMPILE_UTILITY */
 370
 371 /* Now there may be a number of optional lines, each starting with "-".
 372 If you add a new setting here, make sure you set the default above. */
 373
 374 for (;;)
 375   {
 376   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 377   if (big_buffer[0] != '-') break;
 378
 379   big_buffer[Ustrlen(big_buffer) - 1] = 0;
 380   if (Ustrncmp(big_buffer, "-acl ", 5) == 0)
 381     {
 382     int index, count;
 383     if (sscanf(CS big_buffer + 5, "%d %d", &index, &count) != 2)
 384       goto SPOOL_FORMAT_ERROR;
 385     /* Ignore if index too big - might be if a later release with more
 386     variables built this spool file. */
 387     if (index < ACL_C_MAX + ACL_M_MAX)
 388       {
 389       acl_var[index] = store_get(count + 1);
 390       if (fread(acl_var[index], 1, count+1, f) < count) goto SPOOL_READ_ERROR;
 391       acl_var[index][count] = 0;
 392       }
 393     }
 394   else if (Ustrcmp(big_buffer, "-local") == 0) sender_local = TRUE;
 395   else if (Ustrcmp(big_buffer, "-localerror") == 0)
 396     local_error_message = TRUE;
 397   else if (Ustrncmp(big_buffer, "-local_scan ", 12) == 0)
 398     local_scan_data = string_copy(big_buffer + 12);
 399 #ifdef WITH_CONTENT_SCAN
 400   else if (Ustrncmp(big_buffer, "-spam_score_int ", 16) == 0)
 401     spam_score_int = string_copy(big_buffer + 16);
 402 #endif
 403 #ifdef EXPERIMENTAL_BRIGHTMAIL
 404   else if (Ustrncmp(big_buffer, "-bmi_verdicts ", 14) == 0)
 405     bmi_verdicts = string_copy(big_buffer + 14);
 406 #endif
 407   else if (Ustrcmp(big_buffer, "-host_lookup_deferred") == 0)
 408     host_lookup_deferred = TRUE;
 409   else if (Ustrcmp(big_buffer, "-host_lookup_failed") == 0)
 410     host_lookup_failed = TRUE;
 411   else if (Ustrncmp(big_buffer, "-body_linecount", 15) == 0)
 412     body_linecount = Uatoi(big_buffer + 15);
 413   else if (Ustrncmp(big_buffer, "-body_zerocount", 15) == 0)
 414     body_zerocount = Uatoi(big_buffer + 15);
 415   else if (Ustrncmp(big_buffer, "-frozen", 7) == 0)
 416     {
 417     deliver_freeze = TRUE;
 418     deliver_frozen_at = Uatoi(big_buffer + 7);
 419     }
 420   else if (Ustrcmp(big_buffer, "-allow_unqualified_recipient") == 0)
 421     allow_unqualified_recipient = TRUE;
 422   else if (Ustrcmp(big_buffer, "-allow_unqualified_sender") == 0)
 423     allow_unqualified_sender = TRUE;
 424   else if (Ustrcmp(big_buffer, "-deliver_firsttime") == 0)
 425     deliver_firsttime = TRUE;
 426   else if (Ustrcmp(big_buffer, "-manual_thaw") == 0)
 427     deliver_manual_thaw = TRUE;
 428   else if (Ustrncmp(big_buffer, "-auth_id", 8) == 0)
 429     authenticated_id = string_copy(big_buffer + 9);
 430   else if (Ustrncmp(big_buffer, "-auth_sender", 12) == 0)
 431     authenticated_sender = string_copy(big_buffer + 13);
 432   else if (Ustrncmp(big_buffer, "-sender_set_untrusted", 21) == 0)
 433     sender_set_untrusted = TRUE;
 434
 435   #ifdef SUPPORT_TLS
 436   else if (Ustrncmp(big_buffer, "-tls_certificate_verified", 25) == 0)
 437     tls_certificate_verified = TRUE;
 438   else if (Ustrncmp(big_buffer, "-tls_cipher", 11) == 0)
 439     tls_cipher = string_copy(big_buffer + 12);
 440   else if (Ustrncmp(big_buffer, "-tls_peerdn", 11) == 0)
 441     tls_peerdn = string_copy(big_buffer + 12);
 442   #endif
 443
 444   /* We now record the port number after the address, separated by a
 445   dot. For compatibility during upgrading, do nothing if there
 446   isn't a value (it gets left at zero). */
 447
 448   else if (Ustrncmp(big_buffer, "-host_address", 13) == 0)
 449     {
 450     sender_host_port = host_extract_port(big_buffer + 14);
 451     sender_host_address = string_copy(big_buffer + 14);
 452     }
 453
 454   else if (Ustrncmp(big_buffer, "-interface_address", 18) == 0)
 455     {
 456     interface_port = host_extract_port(big_buffer + 19);
 457     interface_address = string_copy(big_buffer + 19);
 458     }
 459
 460   else if (Ustrncmp(big_buffer, "-active_hostname", 16) == 0)
 461     smtp_active_hostname = string_copy(big_buffer + 17);
 462   else if (Ustrncmp(big_buffer, "-host_auth", 10) == 0)
 463     sender_host_authenticated = string_copy(big_buffer + 11);
 464   else if (Ustrncmp(big_buffer, "-host_name", 10) == 0)
 465     sender_host_name = string_copy(big_buffer + 11);
 466   else if (Ustrncmp(big_buffer, "-helo_name", 10) == 0)
 467     sender_helo_name = string_copy(big_buffer + 11);
 468   else if (Ustrncmp(big_buffer, "-ident", 6) == 0)
 469     sender_ident = string_copy(big_buffer + 7);
 470   else if (Ustrncmp(big_buffer, "-received_protocol", 18) == 0)
 471     received_protocol = string_copy(big_buffer + 19);
 472   else if (Ustrncmp(big_buffer, "-N", 2) == 0)
 473     dont_deliver = TRUE;
 474
 475   /* To allow new versions of Exim that add additional flags to interwork
 476   with older versions that do not understand them, just ignore any flagged
 477   lines that we don't recognize. Otherwise it wouldn't be possible to back
 478   off a new version that left new-style flags written on the spool. That's
 479   why the following line is commented out. */
 480
 481     /* else goto SPOOL_FORMAT_ERROR; */
 482   }
 483
 484 /* Build sender_fullhost if required */
 485
 486 #ifndef COMPILE_UTILITY
 487 host_build_sender_fullhost();
 488 #endif  /* COMPILE_UTILITY */
 489
 490 #ifndef COMPILE_UTILITY
 491 DEBUG(D_deliver)
 492   debug_printf("sender_local=%d ident=%s\n", sender_local,
 493     (sender_ident == NULL)? US"unset" : sender_ident);
 494 #endif  /* COMPILE_UTILITY */
 495
 496 /* We now have the tree of addresses NOT to deliver to, or a line
 497 containing "XX", indicating no tree. */
 498
 499 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
 500   !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
 501     goto SPOOL_FORMAT_ERROR;
 502
 503 #ifndef COMPILE_UTILITY
 504 DEBUG(D_deliver)
 505   {
 506   debug_printf("Non-recipients:\n");
 507   debug_print_tree(tree_nonrecipients);
 508   }
 509 #endif  /* COMPILE_UTILITY */
 510
 511 /* After reading the tree, the next line has not yet been read into the
 512 buffer. It contains the count of recipients which follow on separate lines. */
 513
 514 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 515 if (sscanf(CS big_buffer, "%d", &rcount) != 1) goto SPOOL_FORMAT_ERROR;
 516
 517 #ifndef COMPILE_UTILITY
 518 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
 519 #endif  /* COMPILE_UTILITY */
 520
 521 recipients_list_max = rcount;
 522 recipients_list = store_get(rcount * sizeof(recipient_item));
 523
 524 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
 525   {
 526   int nn;
 527   int pno = -1;
 528   uschar *errors_to = NULL;
 529   uschar *p;
 530
 531   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 532   nn = Ustrlen(big_buffer);
 533   if (nn < 2) goto SPOOL_FORMAT_ERROR;
 534
 535   /* Remove the newline; this terminates the address if there is no additional
 536   data on the line. */
 537
 538   p = big_buffer + nn - 1;
 539   *p-- = 0;
 540
 541   /* Look back from the end of the line for digits and special terminators.
 542   Since an address must end with a domain, we can tell that extra data is
 543   present by the presence of the terminator, which is always some character
 544   that cannot exist in a domain. (If I'd thought of the need for additional
 545   data early on, I'd have put it at the start, with the address at the end. As
 546   it is, we have to operate backwards. Addresses are permitted to contain
 547   spaces, you see.)
 548
 549   This code has to cope with various versions of this data that have evolved
 550   over time. In all cases, the line might just contain an address, with no
 551   additional data. Otherwise, the possibilities are as follows:
 552
 553   Exim 3 type:       <address><space><digits>,<digits>,<digits>
 554
 555     The second set of digits is the parent number for one_time addresses. The
 556     other values were remnants of earlier experiments that were abandoned.
 557
 558   Exim 4 first type: <address><space><digits>
 559
 560     The digits are the parent number for one_time addresses.
 561
 562   Exim 4 new type:   <address><space><data>#<type bits>
 563
 564     The type bits indicate what the contents of the data are.
 565
 566     Bit 01 indicates that, reading from right to left, the data
 567       ends with <errors_to address><space><len>,<pno> where pno is
 568       the parent number for one_time addresses, and len is the length
 569       of the errors_to address (zero meaning none).
 570    */
 571
 572   while (isdigit(*p)) p--;
 573
 574   /* Handle Exim 3 spool files */
 575
 576   if (*p == ',')
 577     {
 578     int dummy;
 579     while (isdigit(*(--p)) || *p == ',');
 580     if (*p == ' ')
 581       {
 582       *p++ = 0;
 583       sscanf(CS p, "%d,%d", &dummy, &pno);
 584       }
 585     }
 586
 587   /* Handle early Exim 4 spool files */
 588
 589   else if (*p == ' ')
 590     {
 591     *p++ = 0;
 592     sscanf(CS p, "%d", &pno);
 593     }
 594
 595   /* Handle current format Exim 4 spool files */
 596
 597   else if (*p == '#')
 598     {
 599     int flags;
 600     sscanf(CS p+1, "%d", &flags);
 601
 602     if ((flags & 0x01) != 0)      /* one_time data exists */
 603       {
 604       int len;
 605       while (isdigit(*(--p)) || *p == ',' || *p == '-');
 606       sscanf(CS p+1, "%d,%d", &len, &pno);
 607       *p = 0;
 608       if (len > 0)
 609         {
 610         p -= len;
 611         errors_to = string_copy(p);
 612         }
 613       }
 614
 615     *(--p) = 0;   /* Terminate address */
 616     }
 617
 618   recipients_list[recipients_count].address = string_copy(big_buffer);
 619   recipients_list[recipients_count].pno = pno;
 620   recipients_list[recipients_count].errors_to = errors_to;
 621   }
 622
 623 /* The remainder of the spool header file contains the headers for the message,
 624 separated off from the previous data by a blank line. Each header is preceded
 625 by a count of its length and either a certain letter (for various identified
 626 headers), space (for a miscellaneous live header) or an asterisk (for a header
 627 that has been rewritten). Count the Received: headers. We read the headers
 628 always, in order to check on the format of the file, but only create a header
 629 list if requested to do so. */
 630
 631 inheader = TRUE;
 632 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 633 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
 634
 635 while ((n = fgetc(f)) != EOF)
 636   {
 637   header_line *h;
 638   uschar flag[4];
 639   int i;
 640
 641   if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
 642   ungetc(n, f);
 643   fscanf(f, "%d%c ", &n, flag);
 644   if (flag[0] != '*') message_size += n;  /* Omit non-transmitted headers */
 645
 646   if (read_headers)
 647     {
 648     h = store_get(sizeof(header_line));
 649     h->next = NULL;
 650     h->type = flag[0];
 651     h->slen = n;
 652     h->text = store_get(n+1);
 653
 654     if (h->type == htype_received) received_count++;
 655
 656     if (header_list == NULL) header_list = h;
 657       else header_last->next = h;
 658     header_last = h;
 659
 660     for (i = 0; i < n; i++)
 661       {
 662       int c = fgetc(f);
 663       if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 664       if (c == '\n' && h->type != htype_old) message_linecount++;
 665       h->text[i] = c;
 666       }
 667     h->text[i] = 0;
 668     }
 669
 670   /* Not requiring header data, just skip through the bytes */
 671
 672   else for (i = 0; i < n; i++)
 673     {
 674     int c = fgetc(f);
 675     if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 676     }
 677   }
 678
 679 /* We have successfully read the data in the header file. Update the message
 680 line count by adding the body linecount to the header linecount. Close the file
 681 and give a positive response. */
 682
 683 #ifndef COMPILE_UTILITY
 684 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
 685   body_linecount, message_linecount);
 686 #endif  /* COMPILE_UTILITY */
 687
 688 message_linecount += body_linecount;
 689
 690 fclose(f);
 691 return spool_read_OK;
 692
 693
 694 /* There was an error reading the spool or there was missing data,
 695 or there was a format error. A "read error" with no errno means an
 696 unexpected EOF, which we treat as a format error. */
 697
 698 SPOOL_READ_ERROR:
 699 if (errno != 0)
 700   {
 701   n = errno;
 702
 703   #ifndef COMPILE_UTILITY
 704   DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
 705   #endif  /* COMPILE_UTILITY */
 706
 707   fclose(f);
 708   errno = n;
 709   return inheader? spool_read_hdrerror : spool_read_enverror;
 710   }
 711
 712 SPOOL_FORMAT_ERROR:
 713
 714 #ifndef COMPILE_UTILITY
 715 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
 716 #endif  /* COMPILE_UTILITY */
 717
 718 fclose(f);
 719 errno = ERRNO_SPOOLFORMAT;
 720 return inheader? spool_read_hdrerror : spool_read_enverror;
 721 }
 722
 723 /* End of spool_in.c */