src/src/spool_in.c

   1 /* $Cambridge: exim/src/src/spool_in.c,v 1.26 2009/11/16 19:50:37 nm4 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2009 */
   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 (void)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   (void)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 acl_var_c = acl_var_m = NULL;
 240 authenticated_id = NULL;
 241 authenticated_sender = NULL;
 242 allow_unqualified_recipient = FALSE;
 243 allow_unqualified_sender = FALSE;
 244 body_linecount = 0;
 245 body_zerocount = 0;
 246 deliver_firsttime = FALSE;
 247 deliver_freeze = FALSE;
 248 deliver_frozen_at = 0;
 249 deliver_manual_thaw = FALSE;
 250 /* dont_deliver must NOT be reset */
 251 header_list = header_last = NULL;
 252 host_lookup_deferred = FALSE;
 253 host_lookup_failed = FALSE;
 254 interface_address = NULL;
 255 interface_port = 0;
 256 local_error_message = FALSE;
 257 local_scan_data = NULL;
 258 max_received_linelength = 0;
 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 #ifndef DISABLE_DKIM
 282 dkim_signers = NULL;
 283 dkim_disable_verify = FALSE;
 284 dkim_collect_input = FALSE;
 285 #endif
 286
 287 #ifdef SUPPORT_TLS
 288 tls_certificate_verified = FALSE;
 289 tls_cipher = NULL;
 290 tls_peerdn = NULL;
 291 #endif
 292
 293 #ifdef WITH_CONTENT_SCAN
 294 spam_score_int = NULL;
 295 #endif
 296
 297 /* Generate the full name and open the file. If message_subdir is already
 298 set, just look in the given directory. Otherwise, look in both the split
 299 and unsplit directories, as for the data file above. */
 300
 301 for (n = 0; n < 2; n++)
 302   {
 303   if (!subdir_set)
 304     message_subdir[0] = (split_spool_directory == (n == 0))? name[5] : 0;
 305   sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
 306     name);
 307   f = Ufopen(big_buffer, "rb");
 308   if (f != NULL) break;
 309   if (n != 0 || subdir_set || errno != ENOENT) return spool_read_notopen;
 310   }
 311
 312 errno = 0;
 313
 314 #ifndef COMPILE_UTILITY
 315 DEBUG(D_deliver) debug_printf("reading spool file %s\n", name);
 316 #endif  /* COMPILE_UTILITY */
 317
 318 /* The first line of a spool file contains the message id followed by -H (i.e.
 319 the file name), in order to make the file self-identifying. */
 320
 321 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 322 if (Ustrlen(big_buffer) != MESSAGE_ID_LENGTH + 3 ||
 323     Ustrncmp(big_buffer, name, MESSAGE_ID_LENGTH + 2) != 0)
 324   goto SPOOL_FORMAT_ERROR;
 325
 326 /* The next three lines in the header file are in a fixed format. The first
 327 contains the login, uid, and gid of the user who caused the file to be written.
 328 There are known cases where a negative gid is used, so we allow for both
 329 negative uids and gids. The second contains the mail address of the message's
 330 sender, enclosed in <>. The third contains the time the message was received,
 331 and the number of warning messages for delivery delays that have been sent. */
 332
 333 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 334
 335 p = big_buffer + Ustrlen(big_buffer);
 336 while (p > big_buffer && isspace(p[-1])) p--;
 337 *p = 0;
 338 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 339 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
 340 gid = Uatoi(p);
 341 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 342 *p = 0;
 343 if (!isdigit(p[-1])) goto SPOOL_FORMAT_ERROR;
 344 while (p > big_buffer && (isdigit(p[-1]) || '-' == p[-1])) p--;
 345 uid = Uatoi(p);
 346 if (p <= big_buffer || *(--p) != ' ') goto SPOOL_FORMAT_ERROR;
 347 *p = 0;
 348
 349 originator_login = string_copy(big_buffer);
 350 originator_uid = (uid_t)uid;
 351 originator_gid = (gid_t)gid;
 352
 353 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 354 n = Ustrlen(big_buffer);
 355 if (n < 3 || big_buffer[0] != '<' || big_buffer[n-2] != '>')
 356   goto SPOOL_FORMAT_ERROR;
 357
 358 sender_address = store_get(n-2);
 359 Ustrncpy(sender_address, big_buffer+1, n-3);
 360 sender_address[n-3] = 0;
 361
 362 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 363 if (sscanf(CS big_buffer, "%d %d", &received_time, &warning_count) != 2)
 364   goto SPOOL_FORMAT_ERROR;
 365
 366 message_age = time(NULL) - received_time;
 367
 368 #ifndef COMPILE_UTILITY
 369 DEBUG(D_deliver) debug_printf("user=%s uid=%ld gid=%ld sender=%s\n",
 370   originator_login, (long int)originator_uid, (long int)originator_gid,
 371   sender_address);
 372 #endif  /* COMPILE_UTILITY */
 373
 374 /* Now there may be a number of optional lines, each starting with "-". If you
 375 add a new setting here, make sure you set the default above.
 376
 377 Because there are now quite a number of different possibilities, we use a
 378 switch on the first character to avoid too many failing tests. Thanks to Nico
 379 Erfurth for the patch that implemented this. I have made it even more efficient
 380 by not re-scanning the first two characters.
 381
 382 To allow new versions of Exim that add additional flags to interwork with older
 383 versions that do not understand them, just ignore any lines starting with "-"
 384 that we don't recognize. Otherwise it wouldn't be possible to back off a new
 385 version that left new-style flags written on the spool. */
 386
 387 p = big_buffer + 2;
 388 for (;;)
 389   {
 390   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 391   if (big_buffer[0] != '-') break;
 392   big_buffer[Ustrlen(big_buffer) - 1] = 0;
 393
 394   switch(big_buffer[1])
 395     {
 396     case 'a':
 397
 398     /* Nowadays we use "-aclc" and "-aclm" for the different types of ACL
 399     variable, because Exim allows any number of them, with arbitrary names.
 400     The line in the spool file is "-acl[cm] <name> <length>". The name excludes
 401     the c or m. */
 402
 403     if (Ustrncmp(p, "clc ", 4) == 0 ||
 404         Ustrncmp(p, "clm ", 4) == 0)
 405       {
 406       uschar *name, *endptr;
 407       int count;
 408       tree_node *node;
 409       endptr = Ustrchr(big_buffer + 6, ' ');
 410       if (endptr == NULL) goto SPOOL_FORMAT_ERROR;
 411       name = string_sprintf("%c%.*s", big_buffer[4], endptr - big_buffer - 6,
 412         big_buffer + 6);
 413       if (sscanf(CS endptr, " %d", &count) != 1) goto SPOOL_FORMAT_ERROR;
 414       node = acl_var_create(name);
 415       node->data.ptr = store_get(count + 1);
 416       if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
 417       ((uschar*)node->data.ptr)[count] = 0;
 418       }
 419
 420     else if (Ustrcmp(p, "llow_unqualified_recipient") == 0)
 421       allow_unqualified_recipient = TRUE;
 422     else if (Ustrcmp(p, "llow_unqualified_sender") == 0)
 423       allow_unqualified_sender = TRUE;
 424
 425     else if (Ustrncmp(p, "uth_id", 6) == 0)
 426       authenticated_id = string_copy(big_buffer + 9);
 427     else if (Ustrncmp(p, "uth_sender", 10) == 0)
 428       authenticated_sender = string_copy(big_buffer + 13);
 429     else if (Ustrncmp(p, "ctive_hostname", 14) == 0)
 430       smtp_active_hostname = string_copy(big_buffer + 17);
 431
 432     /* For long-term backward compatibility, we recognize "-acl", which was
 433     used before the number of ACL variables changed from 10 to 20. This was
 434     before the subsequent change to an arbitrary number of named variables.
 435     This code is retained so that upgrades from very old versions can still
 436     handle old-format spool files. The value given after "-acl" is a number
 437     that is 0-9 for connection variables, and 10-19 for message variables. */
 438
 439     else if (Ustrncmp(p, "cl ", 3) == 0)
 440       {
 441       int index, count;
 442       uschar name[20];   /* Need plenty of space for %d format */
 443       tree_node *node;
 444       if (sscanf(CS big_buffer + 5, "%d %d", &index, &count) != 2)
 445         goto SPOOL_FORMAT_ERROR;
 446       if (index < 10)
 447         (void) string_format(name, sizeof(name), "%c%d", 'c', index);
 448       else if (index < 20) /* ignore out-of-range index */
 449         (void) string_format(name, sizeof(name), "%c%d", 'm', index - 10);
 450       node = acl_var_create(name);
 451       node->data.ptr = store_get(count + 1);
 452       if (fread(node->data.ptr, 1, count+1, f) < count) goto SPOOL_READ_ERROR;
 453       ((uschar*)node->data.ptr)[count] = 0;
 454       }
 455     break;
 456
 457     case 'b':
 458     if (Ustrncmp(p, "ody_linecount", 13) == 0)
 459       body_linecount = Uatoi(big_buffer + 15);
 460     else if (Ustrncmp(p, "ody_zerocount", 13) == 0)
 461       body_zerocount = Uatoi(big_buffer + 15);
 462     #ifdef EXPERIMENTAL_BRIGHTMAIL
 463     else if (Ustrncmp(p, "mi_verdicts ", 12) == 0)
 464       bmi_verdicts = string_copy(big_buffer + 14);
 465     #endif
 466     break;
 467
 468     case 'd':
 469     if (Ustrcmp(p, "eliver_firsttime") == 0)
 470       deliver_firsttime = TRUE;
 471     break;
 472
 473     case 'f':
 474     if (Ustrncmp(p, "rozen", 5) == 0)
 475       {
 476       deliver_freeze = TRUE;
 477       deliver_frozen_at = Uatoi(big_buffer + 7);
 478       }
 479     break;
 480
 481     case 'h':
 482     if (Ustrcmp(p, "ost_lookup_deferred") == 0)
 483       host_lookup_deferred = TRUE;
 484     else if (Ustrcmp(p, "ost_lookup_failed") == 0)
 485       host_lookup_failed = TRUE;
 486     else if (Ustrncmp(p, "ost_auth", 8) == 0)
 487       sender_host_authenticated = string_copy(big_buffer + 11);
 488     else if (Ustrncmp(p, "ost_name", 8) == 0)
 489       sender_host_name = string_copy(big_buffer + 11);
 490     else if (Ustrncmp(p, "elo_name", 8) == 0)
 491       sender_helo_name = string_copy(big_buffer + 11);
 492
 493     /* We now record the port number after the address, separated by a
 494     dot. For compatibility during upgrading, do nothing if there
 495     isn't a value (it gets left at zero). */
 496
 497     else if (Ustrncmp(p, "ost_address", 11) == 0)
 498       {
 499       sender_host_port = host_address_extract_port(big_buffer + 14);
 500       sender_host_address = string_copy(big_buffer + 14);
 501       }
 502     break;
 503
 504     case 'i':
 505     if (Ustrncmp(p, "nterface_address", 16) == 0)
 506       {
 507       interface_port = host_address_extract_port(big_buffer + 19);
 508       interface_address = string_copy(big_buffer + 19);
 509       }
 510     else if (Ustrncmp(p, "dent", 4) == 0)
 511       sender_ident = string_copy(big_buffer + 7);
 512     break;
 513
 514     case 'l':
 515     if (Ustrcmp(p, "ocal") == 0) sender_local = TRUE;
 516     else if (Ustrcmp(big_buffer, "-localerror") == 0)
 517       local_error_message = TRUE;
 518     else if (Ustrncmp(p, "ocal_scan ", 10) == 0)
 519       local_scan_data = string_copy(big_buffer + 12);
 520     break;
 521
 522     case 'm':
 523     if (Ustrcmp(p, "anual_thaw") == 0) deliver_manual_thaw = TRUE;
 524     else if (Ustrncmp(p, "ax_received_linelength", 22) == 0)
 525       max_received_linelength = Uatoi(big_buffer + 24);
 526     break;
 527
 528     case 'N':
 529     if (*p == 0) dont_deliver = TRUE;   /* -N */
 530     break;
 531
 532     case 'r':
 533     if (Ustrncmp(p, "eceived_protocol", 16) == 0)
 534       received_protocol = string_copy(big_buffer + 19);
 535     break;
 536
 537     case 's':
 538     if (Ustrncmp(p, "ender_set_untrusted", 19) == 0)
 539       sender_set_untrusted = TRUE;
 540     #ifdef WITH_CONTENT_SCAN
 541     else if (Ustrncmp(p, "pam_score_int ", 14) == 0)
 542       spam_score_int = string_copy(big_buffer + 16);
 543     #endif
 544     break;
 545
 546     #ifdef SUPPORT_TLS
 547     case 't':
 548     if (Ustrncmp(p, "ls_certificate_verified", 23) == 0)
 549       tls_certificate_verified = TRUE;
 550     else if (Ustrncmp(p, "ls_cipher", 9) == 0)
 551       tls_cipher = string_copy(big_buffer + 12);
 552     else if (Ustrncmp(p, "ls_peerdn", 9) == 0)
 553       tls_peerdn = string_copy(big_buffer + 12);
 554     break;
 555     #endif
 556
 557     default:    /* Present because some compilers complain if all */
 558     break;      /* possibilities are not covered. */
 559     }
 560   }
 561
 562 /* Build sender_fullhost if required */
 563
 564 #ifndef COMPILE_UTILITY
 565 host_build_sender_fullhost();
 566 #endif  /* COMPILE_UTILITY */
 567
 568 #ifndef COMPILE_UTILITY
 569 DEBUG(D_deliver)
 570   debug_printf("sender_local=%d ident=%s\n", sender_local,
 571     (sender_ident == NULL)? US"unset" : sender_ident);
 572 #endif  /* COMPILE_UTILITY */
 573
 574 /* We now have the tree of addresses NOT to deliver to, or a line
 575 containing "XX", indicating no tree. */
 576
 577 if (Ustrncmp(big_buffer, "XX\n", 3) != 0 &&
 578   !read_nonrecipients_tree(&tree_nonrecipients, f, big_buffer, big_buffer_size))
 579     goto SPOOL_FORMAT_ERROR;
 580
 581 #ifndef COMPILE_UTILITY
 582 DEBUG(D_deliver)
 583   {
 584   debug_printf("Non-recipients:\n");
 585   debug_print_tree(tree_nonrecipients);
 586   }
 587 #endif  /* COMPILE_UTILITY */
 588
 589 /* After reading the tree, the next line has not yet been read into the
 590 buffer. It contains the count of recipients which follow on separate lines. */
 591
 592 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 593 if (sscanf(CS big_buffer, "%d", &rcount) != 1) goto SPOOL_FORMAT_ERROR;
 594
 595 #ifndef COMPILE_UTILITY
 596 DEBUG(D_deliver) debug_printf("recipients_count=%d\n", rcount);
 597 #endif  /* COMPILE_UTILITY */
 598
 599 recipients_list_max = rcount;
 600 recipients_list = store_get(rcount * sizeof(recipient_item));
 601
 602 for (recipients_count = 0; recipients_count < rcount; recipients_count++)
 603   {
 604   int nn;
 605   int pno = -1;
 606   uschar *errors_to = NULL;
 607   uschar *p;
 608
 609   if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 610   nn = Ustrlen(big_buffer);
 611   if (nn < 2) goto SPOOL_FORMAT_ERROR;
 612
 613   /* Remove the newline; this terminates the address if there is no additional
 614   data on the line. */
 615
 616   p = big_buffer + nn - 1;
 617   *p-- = 0;
 618
 619   /* Look back from the end of the line for digits and special terminators.
 620   Since an address must end with a domain, we can tell that extra data is
 621   present by the presence of the terminator, which is always some character
 622   that cannot exist in a domain. (If I'd thought of the need for additional
 623   data early on, I'd have put it at the start, with the address at the end. As
 624   it is, we have to operate backwards. Addresses are permitted to contain
 625   spaces, you see.)
 626
 627   This code has to cope with various versions of this data that have evolved
 628   over time. In all cases, the line might just contain an address, with no
 629   additional data. Otherwise, the possibilities are as follows:
 630
 631   Exim 3 type:       <address><space><digits>,<digits>,<digits>
 632
 633     The second set of digits is the parent number for one_time addresses. The
 634     other values were remnants of earlier experiments that were abandoned.
 635
 636   Exim 4 first type: <address><space><digits>
 637
 638     The digits are the parent number for one_time addresses.
 639
 640   Exim 4 new type:   <address><space><data>#<type bits>
 641
 642     The type bits indicate what the contents of the data are.
 643
 644     Bit 01 indicates that, reading from right to left, the data
 645       ends with <errors_to address><space><len>,<pno> where pno is
 646       the parent number for one_time addresses, and len is the length
 647       of the errors_to address (zero meaning none).
 648    */
 649
 650   while (isdigit(*p)) p--;
 651
 652   /* Handle Exim 3 spool files */
 653
 654   if (*p == ',')
 655     {
 656     int dummy;
 657     while (isdigit(*(--p)) || *p == ',');
 658     if (*p == ' ')
 659       {
 660       *p++ = 0;
 661       (void)sscanf(CS p, "%d,%d", &dummy, &pno);
 662       }
 663     }
 664
 665   /* Handle early Exim 4 spool files */
 666
 667   else if (*p == ' ')
 668     {
 669     *p++ = 0;
 670     (void)sscanf(CS p, "%d", &pno);
 671     }
 672
 673   /* Handle current format Exim 4 spool files */
 674
 675   else if (*p == '#')
 676     {
 677     int flags;
 678     (void)sscanf(CS p+1, "%d", &flags);
 679
 680     if ((flags & 0x01) != 0)      /* one_time data exists */
 681       {
 682       int len;
 683       while (isdigit(*(--p)) || *p == ',' || *p == '-');
 684       (void)sscanf(CS p+1, "%d,%d", &len, &pno);
 685       *p = 0;
 686       if (len > 0)
 687         {
 688         p -= len;
 689         errors_to = string_copy(p);
 690         }
 691       }
 692
 693     *(--p) = 0;   /* Terminate address */
 694     }
 695
 696   recipients_list[recipients_count].address = string_copy(big_buffer);
 697   recipients_list[recipients_count].pno = pno;
 698   recipients_list[recipients_count].errors_to = errors_to;
 699   }
 700
 701 /* The remainder of the spool header file contains the headers for the message,
 702 separated off from the previous data by a blank line. Each header is preceded
 703 by a count of its length and either a certain letter (for various identified
 704 headers), space (for a miscellaneous live header) or an asterisk (for a header
 705 that has been rewritten). Count the Received: headers. We read the headers
 706 always, in order to check on the format of the file, but only create a header
 707 list if requested to do so. */
 708
 709 inheader = TRUE;
 710 if (Ufgets(big_buffer, big_buffer_size, f) == NULL) goto SPOOL_READ_ERROR;
 711 if (big_buffer[0] != '\n') goto SPOOL_FORMAT_ERROR;
 712
 713 while ((n = fgetc(f)) != EOF)
 714   {
 715   header_line *h;
 716   uschar flag[4];
 717   int i;
 718
 719   if (!isdigit(n)) goto SPOOL_FORMAT_ERROR;
 720   (void)ungetc(n, f);
 721   (void)fscanf(f, "%d%c ", &n, flag);
 722   if (flag[0] != '*') message_size += n;  /* Omit non-transmitted headers */
 723
 724   if (read_headers)
 725     {
 726     h = store_get(sizeof(header_line));
 727     h->next = NULL;
 728     h->type = flag[0];
 729     h->slen = n;
 730     h->text = store_get(n+1);
 731
 732     if (h->type == htype_received) received_count++;
 733
 734     if (header_list == NULL) header_list = h;
 735       else header_last->next = h;
 736     header_last = h;
 737
 738     for (i = 0; i < n; i++)
 739       {
 740       int c = fgetc(f);
 741       if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 742       if (c == '\n' && h->type != htype_old) message_linecount++;
 743       h->text[i] = c;
 744       }
 745     h->text[i] = 0;
 746     }
 747
 748   /* Not requiring header data, just skip through the bytes */
 749
 750   else for (i = 0; i < n; i++)
 751     {
 752     int c = fgetc(f);
 753     if (c == 0 || c == EOF) goto SPOOL_FORMAT_ERROR;
 754     }
 755   }
 756
 757 /* We have successfully read the data in the header file. Update the message
 758 line count by adding the body linecount to the header linecount. Close the file
 759 and give a positive response. */
 760
 761 #ifndef COMPILE_UTILITY
 762 DEBUG(D_deliver) debug_printf("body_linecount=%d message_linecount=%d\n",
 763   body_linecount, message_linecount);
 764 #endif  /* COMPILE_UTILITY */
 765
 766 message_linecount += body_linecount;
 767
 768 fclose(f);
 769 return spool_read_OK;
 770
 771
 772 /* There was an error reading the spool or there was missing data,
 773 or there was a format error. A "read error" with no errno means an
 774 unexpected EOF, which we treat as a format error. */
 775
 776 SPOOL_READ_ERROR:
 777 if (errno != 0)
 778   {
 779   n = errno;
 780
 781   #ifndef COMPILE_UTILITY
 782   DEBUG(D_any) debug_printf("Error while reading spool file %s\n", name);
 783   #endif  /* COMPILE_UTILITY */
 784
 785   fclose(f);
 786   errno = n;
 787   return inheader? spool_read_hdrerror : spool_read_enverror;
 788   }
 789
 790 SPOOL_FORMAT_ERROR:
 791
 792 #ifndef COMPILE_UTILITY
 793 DEBUG(D_any) debug_printf("Format error in spool file %s\n", name);
 794 #endif  /* COMPILE_UTILITY */
 795
 796 fclose(f);
 797 errno = ERRNO_SPOOLFORMAT;
 798 return inheader? spool_read_hdrerror : spool_read_enverror;
 799 }
 800
 801 /* End of spool_in.c */