src/src/spool_in.c

   1 /* $Cambridge: exim/src/src/spool_in.c,v 1.6 2005/01/25 14:16:33 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 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_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 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_deferred") == 0)
 392     host_lookup_deferred = TRUE;
 393   else if (Ustrcmp(big_buffer, "-host_lookup_failed") == 0)
 394     host_lookup_failed = TRUE;
 395   else if (Ustrncmp(big_buffer, "-body_linecount", 15) == 0)
 396     body_linecount = Uatoi(big_buffer + 15);
 397   else if (Ustrncmp(big_buffer, "-body_zerocount", 15) == 0)
 398     body_zerocount = Uatoi(big_buffer + 15);
 399   else if (Ustrncmp(big_buffer, "-frozen", 7) == 0)
 400     {
 401     deliver_freeze = TRUE;
 402     deliver_frozen_at = Uatoi(big_buffer + 7);
 403     }
 404   else if (Ustrcmp(big_buffer, "-allow_unqualified_recipient") == 0)
 405     allow_unqualified_recipient = TRUE;
 406   else if (Ustrcmp(big_buffer, "-allow_unqualified_sender") == 0)
 407     allow_unqualified_sender = TRUE;
 408   else if (Ustrcmp(big_buffer, "-deliver_firsttime") == 0)
 409     deliver_firsttime = TRUE;
 410   else if (Ustrcmp(big_buffer, "-manual_thaw") == 0)
 411     deliver_manual_thaw = TRUE;
 412   else if (Ustrncmp(big_buffer, "-auth_id", 8) == 0)
 413     authenticated_id = string_copy(big_buffer + 9);
 414   else if (Ustrncmp(big_buffer, "-auth_sender", 12) == 0)
 415     authenticated_sender = string_copy(big_buffer + 13);
 416   else if (Ustrncmp(big_buffer, "-sender_set_untrusted", 21) == 0)
 417     sender_set_untrusted = TRUE;
 418
 419   #ifdef SUPPORT_TLS
 420   else if (Ustrncmp(big_buffer, "-tls_certificate_verified", 25) == 0)
 421     tls_certificate_verified = TRUE;
 422   else if (Ustrncmp(big_buffer, "-tls_cipher", 11) == 0)
 423     tls_cipher = string_copy(big_buffer + 12);
 424   else if (Ustrncmp(big_buffer, "-tls_peerdn", 11) == 0)
 425     tls_peerdn = string_copy(big_buffer + 12);
 426   #endif
 427
 428   /* We now record the port number after the address, separated by a
 429   dot. For compatibility during upgrading, do nothing if there
 430   isn't a value (it gets left at zero). */
 431
 432   else if (Ustrncmp(big_buffer, "-host_address", 13) == 0)
 433     {
 434     sender_host_port = host_extract_port(big_buffer + 14);
 435     sender_host_address = string_copy(big_buffer + 14);
 436     }
 437
 438   else if (Ustrncmp(big_buffer, "-interface_address", 18) == 0)
 439     {
 440     interface_port = host_extract_port(big_buffer + 19);
 441     interface_address = string_copy(big_buffer + 19);
 442     }
 443
 444   else if (Ustrncmp(big_buffer, "-active_hostname", 16) == 0)
 445     smtp_active_hostname = string_copy(big_buffer + 17);
 446   else if (Ustrncmp(big_buffer, "-host_auth", 10) == 0)
 447     sender_host_authenticated = string_copy(big_buffer + 11);
 448   else if (Ustrncmp(big_buffer, "-host_name", 10) == 0)
 449     sender_host_name = string_copy(big_buffer + 11);
 450   else if (Ustrncmp(big_buffer, "-helo_name", 10) == 0)
 451     sender_helo_name = string_copy(big_buffer + 11);
 452   else if (Ustrncmp(big_buffer, "-ident", 6) == 0)
 453     sender_ident = string_copy(big_buffer + 7);
 454   else if (Ustrncmp(big_buffer, "-received_protocol", 18) == 0)
 455     received_protocol = string_copy(big_buffer + 19);
 456   else if (Ustrncmp(big_buffer, "-N", 2) == 0)
 457     dont_deliver = TRUE;
 458
 459   /* To allow new versions of Exim that add additional flags to interwork
 460   with older versions that do not understand them, just ignore any flagged
 461   lines that we don't recognize. Otherwise it wouldn't be possible to back
 462   off a new version that left new-style flags written on the spool. That's
 463   why the following line is commented out. */
 464
 465     /* else goto SPOOL_FORMAT_ERROR; */
 466   }
 467
 468 /* Build sender_fullhost if required */
 469
 470 #ifndef COMPILE_UTILITY
 471 host_build_sender_fullhost();
 472 #endif  /* COMPILE_UTILITY */
 473
 474 #ifndef COMPILE_UTILITY
 475 DEBUG(D_deliver)
 476   debug_printf("sender_local=%d ident=%s\n", sender_local,
 477     (sender_ident == NULL)? US"unset" : sender_ident);
 478 #endif  /* COMPILE_UTILITY */
 479
 480 /* We now have the tree of addresses NOT to deliver to, or a line
 481 containing "XX", indicating no tree. */
 482
 483 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
 484   !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
 485     goto SPOOL_FORMAT_ERROR;
 486
 487 #ifndef COMPILE_UTILITY
 488 DEBUG(D_deliver)
 489   {
 490   debug_printf("Non-recipients:\n");
 491   debug_print_tree(tree_nonrecipients);
 492   }
 493 #endif  /* COMPILE_UTILITY */
 494
 495 /* After reading the tree, the next line has not yet been read into the
 496 buffer. It contains the count of recipients which follow on separate lines. */
 497
 498 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 499 if (sscanf(CS big_buffer, "%d", &rcount) != 1) goto SPOOL_FORMAT_ERROR;
 500
 501 #ifndef COMPILE_UTILITY
 502 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
 503 #endif  /* COMPILE_UTILITY */
 504
 505 recipients_list_max = rcount;
 506 recipients_list = store_get(rcount * sizeof(recipient_item));
 507
 508 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
 509   {
 510   int nn;
 511   int pno = -1;
 512   uschar *errors_to = NULL;
 513   uschar *p;
 514
 515   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 516   nn = Ustrlen(big_buffer);
 517   if (nn < 2) goto SPOOL_FORMAT_ERROR;
 518
 519   /* Remove the newline; this terminates the address if there is no additional
 520   data on the line. */
 521
 522   p = big_buffer + nn - 1;
 523   *p-- = 0;
 524
 525   /* Look back from the end of the line for digits and special terminators.
 526   Since an address must end with a domain, we can tell that extra data is
 527   present by the presence of the terminator, which is always some character
 528   that cannot exist in a domain. (If I'd thought of the need for additional
 529   data early on, I'd have put it at the start, with the address at the end. As
 530   it is, we have to operate backwards. Addresses are permitted to contain
 531   spaces, you see.)
 532
 533   This code has to cope with various versions of this data that have evolved
 534   over time. In all cases, the line might just contain an address, with no
 535   additional data. Otherwise, the possibilities are as follows:
 536
 537   Exim 3 type:       <address><space><digits>,<digits>,<digits>
 538
 539     The second set of digits is the parent number for one_time addresses. The
 540     other values were remnants of earlier experiments that were abandoned.
 541
 542   Exim 4 first type: <address><space><digits>
 543
 544     The digits are the parent number for one_time addresses.
 545
 546   Exim 4 new type:   <address><space><data>#<type bits>
 547
 548     The type bits indicate what the contents of the data are.
 549
 550     Bit 01 indicates that, reading from right to left, the data
 551       ends with <errors_to address><space><len>,<pno> where pno is
 552       the parent number for one_time addresses, and len is the length
 553       of the errors_to address (zero meaning none).
 554    */
 555
 556   while (isdigit(*p)) p--;
 557
 558   /* Handle Exim 3 spool files */
 559
 560   if (*p == ',')
 561     {
 562     int dummy;
 563     while (isdigit(*(--p)) || *p == ',');
 564     if (*p == ' ')
 565       {
 566       *p++ = 0;
 567       sscanf(CS p, "%d,%d", &dummy, &pno);
 568       }
 569     }
 570
 571   /* Handle early Exim 4 spool files */
 572
 573   else if (*p == ' ')
 574     {
 575     *p++ = 0;
 576     sscanf(CS p, "%d", &pno);
 577     }
 578
 579   /* Handle current format Exim 4 spool files */
 580
 581   else if (*p == '#')
 582     {
 583     int flags;
 584     sscanf(CS p+1, "%d", &flags);
 585
 586     if ((flags & 0x01) != 0)      /* one_time data exists */
 587       {
 588       int len;
 589       while (isdigit(*(--p)) || *p == ',' || *p == '-');
 590       sscanf(CS p+1, "%d,%d", &len, &pno);
 591       *p = 0;
 592       if (len > 0)
 593         {
 594         p -= len;
 595         errors_to = string_copy(p);
 596         }
 597       }
 598
 599     *(--p) = 0;   /* Terminate address */
 600     }
 601
 602   recipients_list[recipients_count].address = string_copy(big_buffer);
 603   recipients_list[recipients_count].pno = pno;
 604   recipients_list[recipients_count].errors_to = errors_to;
 605   }
 606
 607 /* The remainder of the spool header file contains the headers for the message,
 608 separated off from the previous data by a blank line. Each header is preceded
 609 by a count of its length and either a certain letter (for various identified
 610 headers), space (for a miscellaneous live header) or an asterisk (for a header
 611 that has been rewritten). Count the Received: headers. We read the headers
 612 always, in order to check on the format of the file, but only create a header
 613 list if requested to do so. */
 614
 615 inheader = TRUE;
 616 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 617 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
 618
 619 while ((n = fgetc(f)) != EOF)
 620   {
 621   header_line *h;
 622   uschar flag[4];
 623   int i;
 624
 625   if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
 626   ungetc(n, f);
 627   fscanf(f, "%d%c ", &n, flag);
 628   if (flag[0] != '*') message_size += n;  /* Omit non-transmitted headers */
 629
 630   if (read_headers)
 631     {
 632     h = store_get(sizeof(header_line));
 633     h->next = NULL;
 634     h->type = flag[0];
 635     h->slen = n;
 636     h->text = store_get(n+1);
 637
 638     if (h->type == htype_received) received_count++;
 639
 640     if (header_list == NULL) header_list = h;
 641       else header_last->next = h;
 642     header_last = h;
 643
 644     for (i = 0; i < n; i++)
 645       {
 646       int c = fgetc(f);
 647       if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 648       if (c == '\n' && h->type != htype_old) message_linecount++;
 649       h->text[i] = c;
 650       }
 651     h->text[i] = 0;
 652     }
 653
 654   /* Not requiring header data, just skip through the bytes */
 655
 656   else for (i = 0; i < n; i++)
 657     {
 658     int c = fgetc(f);
 659     if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 660     }
 661   }
 662
 663 /* We have successfully read the data in the header file. Update the message
 664 line count by adding the body linecount to the header linecount. Close the file
 665 and give a positive response. */
 666
 667 #ifndef COMPILE_UTILITY
 668 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
 669   body_linecount, message_linecount);
 670 #endif  /* COMPILE_UTILITY */
 671
 672 message_linecount += body_linecount;
 673
 674 fclose(f);
 675 return spool_read_OK;
 676
 677
 678 /* There was an error reading the spool or there was missing data,
 679 or there was a format error. A "read error" with no errno means an
 680 unexpected EOF, which we treat as a format error. */
 681
 682 SPOOL_READ_ERROR:
 683 if (errno != 0)
 684   {
 685   n = errno;
 686
 687   #ifndef COMPILE_UTILITY
 688   DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
 689   #endif  /* COMPILE_UTILITY */
 690
 691   fclose(f);
 692   errno = n;
 693   return inheader? spool_read_hdrerror : spool_read_enverror;
 694   }
 695
 696 SPOOL_FORMAT_ERROR:
 697
 698 #ifndef COMPILE_UTILITY
 699 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
 700 #endif  /* COMPILE_UTILITY */
 701
 702 fclose(f);
 703 errno = ERRNO_SPOOLFORMAT;
 704 return inheader? spool_read_hdrerror : spool_read_enverror;
 705 }
 706
 707 /* End of spool_in.c */