git.marmaro.de Git - mmh/blob - uip/mhstoresbr.c

   1 /*
   2 ** mhstoresbr.c -- routines to save/store the contents of MIME messages
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <fcntl.h>
  11 #include <h/signals.h>
  12 #include <h/md5.h>
  13 #include <errno.h>
  14 #include <setjmp.h>
  15 #include <signal.h>
  16 #include <h/tws.h>
  17 #include <h/mime.h>
  18 #include <h/mhparse.h>
  19 #include <h/utils.h>
  20
  21
  22 /*
  23 ** The list of top-level contents to display
  24 */
  25 extern CT *cts;
  26
  27 int autosw = 0;
  28
  29 /*
  30 ** Cache of current directory.  This must be
  31 ** set before these routines are called.
  32 */
  33 char *cwd;
  34
  35 /*
  36 ** The directory in which to store the contents.
  37 */
  38 static char *dir;
  39
  40 /*
  41 ** Type for a compare function for qsort.  This keeps
  42 ** the compiler happy.
  43 */
  44 typedef int (*qsort_comp) (const void *, const void *);
  45
  46
  47 /* mhmisc.c */
  48 int part_ok(CT, int);
  49 int type_ok(CT, int);
  50 int make_intermediates(char *);
  51 void flush_errors(void);
  52
  53 /* mhshowsbr.c */
  54 int show_content_aux(CT, int, int, char *, char *);
  55
  56 /*
  57 ** prototypes
  58 */
  59 void store_all_messages(CT *);
  60
  61 /*
  62 ** static prototypes
  63 */
  64 static void store_single_message(CT);
  65 static int store_switch(CT);
  66 static int store_generic(CT);
  67 static int store_application(CT);
  68 static int store_multi(CT);
  69 static int store_partial(CT);
  70 static int store_external(CT);
  71 static int ct_compar(CT *, CT *);
  72 static int store_content(CT, CT);
  73 static int output_content_file(CT, int);
  74 static int output_content_folder(char *, char *);
  75 static int parse_format_string(CT, char *, char *, int, char *);
  76 static void get_storeproc(CT);
  77 static int copy_some_headers(FILE *, CT);
  78
  79
  80 /*
  81 ** Main entry point to store content
  82 ** from a collection of messages.
  83 */
  84
  85 void
  86 store_all_messages(CT *cts)
  87 {
  88         CT ct, *ctp;
  89         char *cp;
  90
  91         /*
  92         ** Check for the directory in which to
  93         ** store any contents.
  94         */
  95         if (autosw)
  96                 dir = getcpy(cwd);
  97         else if ((cp = context_find(nmhstorage)) && *cp)
  98                 dir = getcpy(cp);
  99         else
 100                 dir = getcpy(cwd);
 101
 102         for (ctp = cts; *ctp; ctp++) {
 103                 ct = *ctp;
 104                 store_single_message(ct);
 105         }
 106
 107         flush_errors();
 108 }
 109
 110
 111 /*
 112 ** Entry point to store the content
 113 ** in a (single) message
 114 */
 115
 116 static void
 117 store_single_message(CT ct)
 118 {
 119         if (type_ok(ct, 1)) {
 120                 umask(ct->c_umask);
 121                 store_switch(ct);
 122                 if (ct->c_fp) {
 123                         fclose(ct->c_fp);
 124                         ct->c_fp = NULL;
 125                 }
 126                 if (ct->c_ceclosefnx)
 127                         (*ct->c_ceclosefnx) (ct);
 128         }
 129 }
 130
 131
 132 /*
 133 ** Switching routine to store different content types
 134 */
 135
 136 static int
 137 store_switch(CT ct)
 138 {
 139         switch (ct->c_type) {
 140         case CT_MULTIPART:
 141                 return store_multi(ct);
 142                 break;
 143
 144         case CT_MESSAGE:
 145                 switch (ct->c_subtype) {
 146                 case MESSAGE_PARTIAL:
 147                         return store_partial(ct);
 148                         break;
 149
 150                 case MESSAGE_EXTERNAL:
 151                         return store_external(ct);
 152
 153                 case MESSAGE_RFC822:
 154                 default:
 155                         return store_generic(ct);
 156                         break;
 157                 }
 158                 break;
 159
 160         case CT_APPLICATION:
 161                 return store_application(ct);
 162                 break;
 163
 164         case CT_TEXT:
 165         case CT_AUDIO:
 166         case CT_IMAGE:
 167         case CT_VIDEO:
 168                 return store_generic(ct);
 169                 break;
 170
 171         default:
 172                 adios(NULL, "unknown content type %d", ct->c_type);
 173                 break;
 174         }
 175
 176         return OK;  /* NOT REACHED */
 177 }
 178
 179
 180 /*
 181 ** Generic routine to store a MIME content.
 182 ** (audio, video, image, text, message/rfc922)
 183 */
 184
 185 static int
 186 store_generic(CT ct)
 187 {
 188         /*
 189         ** Check if the content specifies a filename.
 190         ** Don't bother with this for type "message"
 191         ** (only "message/rfc822" will use store_generic).
 192         */
 193         if (autosw && ct->c_type != CT_MESSAGE)
 194                 get_storeproc(ct);
 195
 196         return store_content(ct, NULL);
 197 }
 198
 199
 200 /*
 201 ** Store content of type "application"
 202 */
 203
 204 static int
 205 store_application(CT ct)
 206 {
 207         char **ap, **ep;
 208         CI ci = &ct->c_ctinfo;
 209
 210         /* Check if the content specifies a filename */
 211         if (autosw)
 212                 get_storeproc(ct);
 213
 214         /*
 215         ** If storeproc is not defined, and the content is type
 216         ** "application/octet-stream", we also check for various
 217         ** attribute/value pairs which specify if this a tar file.
 218         */
 219         if (!ct->c_storeproc && ct->c_subtype == APPLICATION_OCTETS) {
 220                 int tarP = 0, zP = 0, gzP = 0;
 221
 222                 for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
 223                         /* check for "type=tar" attribute */
 224                         if (!mh_strcasecmp(*ap, "type")) {
 225                                 if (mh_strcasecmp(*ep, "tar"))
 226                                         break;
 227
 228                                 tarP = 1;
 229                                 continue;
 230                         }
 231
 232                         /* check for "conversions=compress" attribute */
 233                         if ((!mh_strcasecmp(*ap, "conversions") ||
 234                                         !mh_strcasecmp(*ap, "x-conversions"))
 235                                         && (!mh_strcasecmp(*ep, "compress") ||
 236                                         !mh_strcasecmp(*ep, "x-compress"))) {
 237                                 zP = 1;
 238                                 continue;
 239                         }
 240                         /* check for "conversions=gzip" attribute */
 241                         if ((!mh_strcasecmp(*ap, "conversions") ||
 242                                         !mh_strcasecmp(*ap, "x-conversions"))
 243                                         && (!mh_strcasecmp(*ep, "gzip") ||
 244                                         !mh_strcasecmp(*ep, "x-gzip"))) {
 245                                 gzP = 1;
 246                                 continue;
 247                         }
 248                 }
 249
 250                 if (tarP) {
 251                         ct->c_showproc = getcpy(zP ? "%euncompress | tar tvf -" : (gzP ? "%egzip -dc | tar tvf -" : "%etar tvf -"));
 252                         if (!ct->c_storeproc) {
 253                                 if (autosw) {
 254                                         ct->c_storeproc = getcpy(zP ? "| uncompress | tar xvpf -" : (gzP ? "| gzip -dc | tar xvpf -" : "| tar xvpf -"));
 255                                         ct->c_umask = 0022;
 256                                 } else {
 257                                         ct->c_storeproc= getcpy(zP ? "%m%P.tar.Z" : (gzP ? "%m%P.tar.gz" : "%m%P.tar"));
 258                                 }
 259                         }
 260                 }
 261         }
 262
 263         return store_content(ct, NULL);
 264 }
 265
 266
 267 /*
 268 ** Store the content of a multipart message
 269 */
 270
 271 static int
 272 store_multi(CT ct)
 273 {
 274         int result;
 275         struct multipart *m = (struct multipart *) ct->c_ctparams;
 276         struct part *part;
 277
 278         result = NOTOK;
 279         for (part = m->mp_parts; part; part = part->mp_next) {
 280                 CT  p = part->mp_part;
 281
 282                 if (part_ok(p, 1) && type_ok(p, 1)) {
 283                         result = store_switch(p);
 284                         if (result == OK && ct->c_subtype == MULTI_ALTERNATE)
 285                                 break;
 286                 }
 287         }
 288
 289         return result;
 290 }
 291
 292
 293 /*
 294 ** Reassemble and store the contents of a collection
 295 ** of messages of type "message/partial".
 296 */
 297
 298 static int
 299 store_partial(CT ct)
 300 {
 301         int cur, hi, i;
 302         CT p, *ctp, *ctq;
 303         CT *base;
 304         struct partial *pm, *qm;
 305
 306         qm = (struct partial *) ct->c_ctparams;
 307         if (qm->pm_stored)
 308                 return OK;
 309
 310         hi = i = 0;
 311         for (ctp = cts; *ctp; ctp++) {
 312                 p = *ctp;
 313                 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 314                         pm = (struct partial *) p->c_ctparams;
 315                         if (!pm->pm_stored &&
 316                                         strcmp(qm->pm_partid, pm->pm_partid)
 317                                         == 0) {
 318                                 pm->pm_marked = pm->pm_partno;
 319                                 if (pm->pm_maxno)
 320                                         hi = pm->pm_maxno;
 321                                 pm->pm_stored = 1;
 322                                 i++;
 323                         } else
 324                                 pm->pm_marked = 0;
 325                 }
 326         }
 327
 328         if (hi == 0) {
 329                 advise(NULL, "missing (at least) last part of multipart message");
 330                 return NOTOK;
 331         }
 332
 333         if ((base = (CT *) calloc((size_t) (i + 1), sizeof(*base))) == NULL)
 334                 adios(NULL, "out of memory");
 335
 336         ctq = base;
 337         for (ctp = cts; *ctp; ctp++) {
 338                 p = *ctp;
 339                 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 340                         pm = (struct partial *) p->c_ctparams;
 341                         if (pm->pm_marked)
 342                                 *ctq++ = p;
 343                 }
 344         }
 345         *ctq = NULL;
 346
 347         if (i > 1)
 348                 qsort((char *) base, i, sizeof(*base), (qsort_comp) ct_compar);
 349
 350         cur = 1;
 351         for (ctq = base; *ctq; ctq++) {
 352                 p = *ctq;
 353                 pm = (struct partial *) p->c_ctparams;
 354                 if (pm->pm_marked != cur) {
 355                         if (pm->pm_marked == cur - 1) {
 356                                 admonish(NULL, "duplicate part %d of %d part multipart message", pm->pm_marked, hi);
 357                                 continue;
 358                         }
 359
 360 missing_part:
 361                         advise (NULL, "missing %spart %d of %d part multipart message", cur != hi ? "(at least) " : "", cur, hi);
 362                         goto losing;
 363                 } else
 364                         cur++;
 365         }
 366         if (hi != --cur) {
 367                 cur = hi;
 368                 goto missing_part;
 369         }
 370
 371         /*
 372         ** Now cycle through the sorted list of messages of type
 373         ** "message/partial" and save/append them to a file.
 374         */
 375
 376         ctq = base;
 377         ct = *ctq++;
 378         if (store_content(ct, NULL) == NOTOK) {
 379 losing:
 380                 free((char *) base);
 381                 return NOTOK;
 382         }
 383
 384         for (; *ctq; ctq++) {
 385                 p = *ctq;
 386                 if (store_content(p, ct) == NOTOK)
 387                         goto losing;
 388         }
 389
 390         free((char *) base);
 391         return OK;
 392 }
 393
 394
 395 /*
 396 ** Store content from a message of type "message/external".
 397 */
 398
 399 static int
 400 store_external(CT ct)
 401 {
 402         int result = NOTOK;
 403         struct exbody *e = (struct exbody *) ct->c_ctparams;
 404         CT p = e->eb_content;
 405
 406         if (!type_ok(p, 1))
 407                 return OK;
 408
 409         /*
 410         ** Check if the parameters for the external body
 411         ** specified a filename.
 412         */
 413         if (autosw) {
 414                 char *cp;
 415
 416                 if ((cp = e->eb_name) && *cp != '/' && *cp != '.' &&
 417                                 *cp != '|' && *cp != '!' && !strchr(cp, '%')) {
 418                         if (!ct->c_storeproc)
 419                                 ct->c_storeproc = getcpy(cp);
 420                         if (!p->c_storeproc)
 421                                 p->c_storeproc = getcpy(cp);
 422                 }
 423         }
 424
 425         /*
 426         ** Since we will let the Content structure for the
 427         ** external body substitute for the current content,
 428         ** we temporarily change its partno (number inside
 429         ** multipart), so everything looks right.
 430         */
 431         p->c_partno = ct->c_partno;
 432
 433         /* we probably need to check if content is really there */
 434         result = store_switch(p);
 435
 436         p->c_partno = NULL;
 437         return result;
 438 }
 439
 440
 441 /*
 442 ** Compare the numbering from two different
 443 ** message/partials (needed for sorting).
 444 */
 445
 446 static int
 447 ct_compar(CT *a, CT *b)
 448 {
 449         struct partial *am = (struct partial *) ((*a)->c_ctparams);
 450         struct partial *bm = (struct partial *) ((*b)->c_ctparams);
 451
 452         return (am->pm_marked - bm->pm_marked);
 453 }
 454
 455
 456 /*
 457 ** Store contents of a message or message part to
 458 ** a folder, a file, the standard output, or pass
 459 ** the contents to a command.
 460 **
 461 ** If the current content to be saved is a followup part
 462 ** to a collection of messages of type "message/partial",
 463 ** then field "p" is a pointer to the Content structure
 464 ** to the first message/partial in the group.
 465 */
 466
 467 static int
 468 store_content(CT ct, CT p)
 469 {
 470         int appending = 0, msgnum = 0;
 471         int is_partial = 0, first_partial = 0;
 472         int last_partial = 0;
 473         char *cp, buffer[BUFSIZ];
 474
 475         /*
 476         ** Do special processing for messages of
 477         ** type "message/partial".
 478         **
 479         ** We first check if this content is of type
 480         ** "message/partial".  If it is, then we need to check
 481         ** whether it is the first and/or last in the group.
 482         **
 483         ** Then if "p" is a valid pointer, it points to the Content
 484         ** structure of the first partial in the group.  So we copy
 485         ** the file name and/or folder name from that message.  In
 486         ** this case, we also note that we will be appending.
 487         */
 488         if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 489                 struct partial *pm = (struct partial *) ct->c_ctparams;
 490
 491                 /* Yep, it's a message/partial */
 492                 is_partial = 1;
 493
 494                 /* But is it the first and/or last in the collection? */
 495                 if (pm->pm_partno == 1)
 496                         first_partial = 1;
 497                 if (pm->pm_maxno && pm->pm_partno == pm->pm_maxno)
 498                         last_partial = 1;
 499
 500                 /*
 501                 ** If "p" is a valid pointer, then it points to the
 502                 ** Content structure for the first message in the group.
 503                 ** So we just copy the filename or foldername information
 504                 ** from the previous iteration of this function.
 505                 */
 506                 if (p) {
 507                         appending = 1;
 508                         ct->c_storage = getcpy(p->c_storage);
 509
 510                         /* record the folder name */
 511                         if (p->c_folder) {
 512                                 ct->c_folder = getcpy(p->c_folder);
 513                         }
 514                         goto got_filename;
 515                 }
 516         }
 517
 518         /*
 519         ** Get storage formatting string.
 520         **
 521         ** 1) If we have storeproc defined, then use that
 522         ** 2) Else check for a mhstore-store-<type>/<subtype> entry
 523         ** 3) Else check for a mhstore-store-<type> entry
 524         ** 4) Else if content is "message", use "+" (current folder)
 525         ** 5) Else use string "%m%P.%s".
 526         */
 527         if ((cp = ct->c_storeproc) == NULL || *cp == '\0') {
 528                 CI ci = &ct->c_ctinfo;
 529
 530                 snprintf(buffer, sizeof(buffer), "%s-store-%s/%s",
 531                                 invo_name, ci->ci_type, ci->ci_subtype);
 532                 if ((cp = context_find(buffer)) == NULL || *cp == '\0') {
 533                         snprintf(buffer, sizeof(buffer), "%s-store-%s",
 534                                         invo_name, ci->ci_type);
 535                         if ((cp = context_find(buffer)) == NULL ||
 536                                         *cp == '\0') {
 537                                 cp = ct->c_type == CT_MESSAGE ?
 538                                                 "+" : "%m%P.%s";
 539                         }
 540                 }
 541         }
 542
 543         /*
 544         ** Check the beginning of storage formatting string
 545         ** to see if we are saving content to a folder.
 546         */
 547         if (*cp == '+' || *cp == '@') {
 548                 char *tmpfilenam, *folder;
 549
 550                 /* Store content in temporary file for now */
 551                 tmpfilenam = m_mktemp(invo_name, NULL, NULL);
 552                 ct->c_storage = getcpy(tmpfilenam);
 553
 554                 /* Get the folder name */
 555                 if (cp[1])
 556                         folder = getcpy(expandfol(cp));
 557                 else
 558                         folder = getcurfol();
 559
 560                 /* Check if folder exists */
 561                 create_folder(toabsdir(folder), 0, exit);
 562
 563                 /* Record the folder name */
 564                 ct->c_folder = getcpy(folder);
 565
 566                 if (cp[1])
 567                         free(folder);
 568
 569                 goto got_filename;
 570         }
 571
 572         /*
 573         ** Parse and expand the storage formatting string
 574         ** in `cp' into `buffer'.
 575         */
 576         parse_format_string(ct, cp, buffer, sizeof(buffer), dir);
 577
 578         /*
 579         ** If formatting begins with '|' or '!', then pass
 580         ** content to standard input of a command and return.
 581         */
 582         if (buffer[0] == '|' || buffer[0] == '!')
 583                 return show_content_aux(ct, 1, 0, buffer + 1, dir);
 584
 585         /* record the filename */
 586         ct->c_storage = getcpy(buffer);
 587
 588 got_filename:
 589         /* flush the output stream */
 590         fflush(stdout);
 591
 592         /* Now save or append the content to a file */
 593         if (output_content_file(ct, appending) == NOTOK)
 594                 return NOTOK;
 595
 596         /*
 597         ** If necessary, link the file into a folder and remove
 598         ** the temporary file.  If this message is a partial,
 599         ** then only do this if it is the last one in the group.
 600         */
 601         if (ct->c_folder && (!is_partial || last_partial)) {
 602                 msgnum = output_content_folder(ct->c_folder, ct->c_storage);
 603                 unlink(ct->c_storage);
 604                 if (msgnum == NOTOK)
 605                         return NOTOK;
 606         }
 607
 608         /*
 609         ** Now print out the name/number of the message
 610         ** that we are storing.
 611         */
 612         if (is_partial) {
 613                 if (first_partial)
 614                         fprintf(stderr, "reassembling partials ");
 615                 if (last_partial)
 616                         fprintf(stderr, "%s", ct->c_file);
 617                 else
 618                         fprintf(stderr, "%s,", ct->c_file);
 619         } else {
 620                 fprintf(stderr, "storing message %s", ct->c_file);
 621                 if (ct->c_partno)
 622                         fprintf(stderr, " part %s", ct->c_partno);
 623         }
 624
 625         /*
 626         ** Unless we are in the "middle" of group of message/partials,
 627         ** we now print the name of the file, folder, and/or message
 628         ** to which we are storing the content.
 629         */
 630         if (!is_partial || last_partial) {
 631                 if (ct->c_folder) {
 632                         fprintf(stderr, " to folder %s as message %d\n",
 633                                         ct->c_folder, msgnum);
 634                 } else if (strcmp(ct->c_storage, "-")==0) {
 635                         fprintf(stderr, " to stdout\n");
 636                 } else {
 637                         int cwdlen;
 638
 639                         cwdlen = strlen(cwd);
 640                         fprintf(stderr, " as file %s\n",
 641                                         strncmp(ct->c_storage, cwd,
 642                                         cwdlen)!=0 ||
 643                                         ct->c_storage[cwdlen] != '/' ?
 644                                         ct->c_storage :
 645                                         ct->c_storage + cwdlen + 1);
 646                 }
 647         }
 648
 649         return OK;
 650 }
 651
 652
 653 /*
 654 ** Output content to a file
 655 */
 656
 657 static int
 658 output_content_file(CT ct, int appending)
 659 {
 660         int filterstate;
 661         char *file, buffer[BUFSIZ];
 662         long pos, last;
 663         FILE *fp;
 664
 665         /*
 666         ** If the pathname is absolute, make sure
 667         ** all the relevant directories exist.
 668         */
 669         if (strchr(ct->c_storage, '/') && make_intermediates(ct->c_storage)
 670                         == NOTOK)
 671                 return NOTOK;
 672
 673         if (ct->c_encoding != CE_7BIT) {
 674                 int cc, fd;
 675
 676                 if (!ct->c_ceopenfnx) {
 677                         advise(NULL, "don't know how to decode part %s of message %s", ct->c_partno, ct->c_file);
 678                         return NOTOK;
 679                 }
 680
 681                 file = appending || strcmp(ct->c_storage, "-")==0 ?
 682                                 NULL : ct->c_storage;
 683                 if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
 684                         return NOTOK;
 685                 if (strcmp(file, ct->c_storage)==0) {
 686                         (*ct->c_ceclosefnx) (ct);
 687                         return OK;
 688                 }
 689
 690                 /*
 691                 ** Send to standard output
 692                 */
 693                 if (strcmp(ct->c_storage, "-")==0) {
 694                         int gd;
 695
 696                         if ((gd = dup(fileno(stdout))) == NOTOK) {
 697                                 advise("stdout", "unable to dup");
 698 losing:
 699                                 (*ct->c_ceclosefnx) (ct);
 700                                 return NOTOK;
 701                         }
 702                         if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
 703                                 advise("stdout", "unable to fdopen (%d, \"%s\") from", gd, appending ? "a" : "w");
 704                                 close(gd);
 705                                 goto losing;
 706                         }
 707                 } else {
 708                         /*
 709                         ** Open output file
 710                         */
 711                         if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
 712                                         == NULL) {
 713                                 advise(ct->c_storage, "unable to fopen for %s",
 714                                                 appending ?
 715                                                 "appending" : "writing");
 716                                 goto losing;
 717                         }
 718                 }
 719
 720                 /*
 721                 ** Filter the header fields of the initial enclosing
 722                 ** message/partial into the file.
 723                 */
 724                 if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 725                         struct partial *pm = (struct partial *) ct->c_ctparams;
 726
 727                         if (pm->pm_partno == 1)
 728                                 copy_some_headers(fp, ct);
 729                 }
 730
 731                 for (;;) {
 732                         switch (cc = read(fd, buffer, sizeof(buffer))) {
 733                         case NOTOK:
 734                                 advise(file, "error reading content from");
 735                                 break;
 736
 737                         case OK:
 738                                 break;
 739
 740                         default:
 741                                 fwrite(buffer, sizeof(*buffer), cc, fp);
 742                                 continue;
 743                         }
 744                         break;
 745                 }
 746
 747                 (*ct->c_ceclosefnx) (ct);
 748
 749                 if (cc != NOTOK && fflush(fp))
 750                         advise(ct->c_storage, "error writing to");
 751
 752                 fclose(fp);
 753
 754                 return (cc != NOTOK ? OK : NOTOK);
 755         }
 756
 757         if (!ct->c_fp && (ct->c_fp = fopen(ct->c_file, "r")) == NULL) {
 758                 advise(ct->c_file, "unable to open for reading");
 759                 return NOTOK;
 760         }
 761
 762         pos = ct->c_begin;
 763         last = ct->c_end;
 764         fseek(ct->c_fp, pos, SEEK_SET);
 765
 766         if (strcmp(ct->c_storage, "-")==0) {
 767                 int gd;
 768
 769                 if ((gd = dup(fileno(stdout))) == NOTOK) {
 770                         advise("stdout", "unable to dup");
 771                         return NOTOK;
 772                 }
 773                 if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
 774                         advise("stdout", "unable to fdopen (%d, \"%s\") from",
 775                                         gd, appending ? "a" : "w");
 776                         close(gd);
 777                         return NOTOK;
 778                 }
 779         } else {
 780                 if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
 781                                 == NULL) {
 782                         advise(ct->c_storage, "unable to fopen for %s",
 783                                         appending ? "appending" : "writing");
 784                         return NOTOK;
 785                 }
 786         }
 787
 788         /*
 789         ** Copy a few of the header fields of the initial
 790         ** enclosing message/partial into the file.
 791         */
 792         filterstate = 0;
 793         if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 794                 struct partial *pm = (struct partial *) ct->c_ctparams;
 795
 796                 if (pm->pm_partno == 1) {
 797                         copy_some_headers(fp, ct);
 798                         filterstate = 1;
 799                 }
 800         }
 801
 802         while (fgets(buffer, sizeof(buffer) - 1, ct->c_fp)) {
 803                 if ((pos += strlen(buffer)) > last) {
 804                         int diff;
 805
 806                         diff = strlen(buffer) - (pos - last);
 807                         if (diff >= 0)
 808                                 buffer[diff] = '\0';
 809                 }
 810                 /*
 811                 ** If this is the first content of a group of
 812                 ** message/partial contents, then we only copy a few
 813                 ** of the header fields of the enclosed message.
 814                 */
 815                 if (filterstate) {
 816                         switch (buffer[0]) {
 817                         case ' ':
 818                         case '\t':
 819                                 if (filterstate < 0)
 820                                         buffer[0] = 0;
 821                                 break;
 822
 823                         case '\n':
 824                                 filterstate = 0;
 825                                 break;
 826
 827                         default:
 828                                 if (!uprf(buffer, XXX_FIELD_PRF) && !uprf(buffer, VRSN_FIELD) && !uprf(buffer, "Subject:") && !uprf(buffer, "Message-ID:")) {
 829                                         filterstate = -1;
 830                                         buffer[0] = 0;
 831                                         break;
 832                                 }
 833                                 filterstate = 1;
 834                                 break;
 835                         }
 836                 }
 837                 fputs(buffer, fp);
 838                 if (pos >= last)
 839                         break;
 840         }
 841
 842         if (fflush(fp))
 843                 advise(ct->c_storage, "error writing to");
 844
 845         fclose(fp);
 846         fclose(ct->c_fp);
 847         ct->c_fp = NULL;
 848         return OK;
 849 }
 850
 851
 852 /*
 853 ** Add a file to a folder.
 854 **
 855 ** Return the new message number of the file
 856 ** when added to the folder.  Return -1, if
 857 ** there is an error.
 858 */
 859
 860 static int
 861 output_content_folder(char *folder, char *filename)
 862 {
 863         int msgnum;
 864         struct msgs *mp;
 865
 866         /* Read the folder. */
 867         if ((mp = folder_read(folder))) {
 868                 /* Link file into folder */
 869                 msgnum = folder_addmsg(&mp, filename, 0, 0, 0, 0, NULL);
 870         } else {
 871                 advise(NULL, "unable to read folder %s", folder);
 872                 return NOTOK;
 873         }
 874
 875         /* free folder structure */
 876         folder_free(mp);
 877
 878         /*
 879         ** Return msgnum.  We are relying on the fact that
 880         ** msgnum will be -1, if folder_addmsg() had an error.
 881         */
 882         return msgnum;
 883 }
 884
 885
 886 /*
 887 ** Parse and expand the storage formatting string
 888 ** pointed to by "cp" into "buffer".
 889 */
 890
 891 static int
 892 parse_format_string(CT ct, char *cp, char *buffer, int buflen, char *dir)
 893 {
 894         int len;
 895         char *bp;
 896         CI ci = &ct->c_ctinfo;
 897
 898         /*
 899         ** If storage string is "-", just copy it, and
 900         ** return (send content to standard output).
 901         */
 902         if (cp[0] == '-' && cp[1] == '\0') {
 903                 strncpy(buffer, cp, buflen);
 904                 return 0;
 905         }
 906
 907         bp = buffer;
 908         bp[0] = '\0';
 909
 910         /*
 911         ** If formatting string is a pathname that doesn't
 912         ** begin with '/', then preface the path with the
 913         ** appropriate directory.
 914         */
 915         if (*cp != '/' && *cp != '|' && *cp != '!') {
 916                 snprintf(bp, buflen, "%s/", dir[1] ? dir : "");
 917                 len = strlen(bp);
 918                 bp += len;
 919                 buflen -= len;
 920         }
 921
 922         for (; *cp; cp++) {
 923
 924                 /* We are processing a storage escape */
 925                 if (*cp == '%') {
 926                         switch (*++cp) {
 927                         case 'a':
 928                                 /*
 929                                 ** Insert parameters from Content-Type.
 930                                 ** This is only valid for '|' commands.
 931                                 */
 932                                 if (buffer[0] != '|' && buffer[0] != '!') {
 933                                         *bp++ = *--cp;
 934                                         *bp = '\0';
 935                                         buflen--;
 936                                         continue;
 937                                 } else {
 938                                         char **ap, **ep;
 939                                         char *s = "";
 940
 941                                         for (ap=ci->ci_attrs, ep=ci->ci_values;
 942                                                          *ap; ap++, ep++) {
 943                                                 snprintf(bp, buflen,
 944                                                                 "%s%s=\"%s\"",
 945                                                                 s, *ap, *ep);
 946                                                 len = strlen(bp);
 947                                                 bp += len;
 948                                                 buflen -= len;
 949                                                 s = " ";
 950                                         }
 951                                 }
 952                                 break;
 953
 954                         case 'm':
 955                                 /* insert message number */
 956                                 snprintf(bp, buflen, "%s",
 957                                                 mhbasename(ct->c_file));
 958                                 break;
 959
 960                         case 'P':
 961                                 /* insert part number with leading dot */
 962                                 if (ct->c_partno)
 963                                         snprintf(bp, buflen, ".%s",
 964                                                         ct->c_partno);
 965                                 break;
 966
 967                         case 'p':
 968                                 /* insert part number withouth leading dot */
 969                                 if (ct->c_partno)
 970                                         strncpy(bp, ct->c_partno, buflen);
 971                                 break;
 972
 973                         case 't':
 974                                 /* insert content type */
 975                                 strncpy(bp, ci->ci_type, buflen);
 976                                 break;
 977
 978                         case 's':
 979                                 /* insert content subtype */
 980                                 strncpy(bp, ci->ci_subtype, buflen);
 981                                 break;
 982
 983                         case '%':
 984                                 /* insert the character % */
 985                                 goto raw;
 986
 987                         default:
 988                                 *bp++ = *--cp;
 989                                 *bp = '\0';
 990                                 buflen--;
 991                                 continue;
 992                         }
 993
 994                         /* Advance bp and decrement buflen */
 995                         len = strlen(bp);
 996                         bp += len;
 997                         buflen -= len;
 998
 999                 } else {
1000 raw:
1001                         *bp++ = *cp;
1002                         *bp = '\0';
1003                         buflen--;
1004                 }
1005         }
1006
1007         return 0;
1008 }
1009
1010
1011 /*
1012 ** Check if the content specifies a filename
1013 ** in its MIME parameters.
1014 */
1015
1016 static void
1017 get_storeproc(CT ct)
1018 {
1019         char **ap, **ep, *cp;
1020         CI ci = &ct->c_ctinfo;
1021
1022         /*
1023         ** If the storeproc has already been defined,
1024         ** we just return (for instance, if this content
1025         ** is part of a "message/external".
1026         */
1027         if (ct->c_storeproc)
1028                 return;
1029
1030         /*
1031         ** Check the attribute/value pairs, for the attribute "name".
1032         ** If found, do a few sanity checks and copy the value into
1033         ** the storeproc.
1034         */
1035         for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
1036                 if (!mh_strcasecmp(*ap, "name") && *(cp = *ep) != '/' &&
1037                                 *cp != '.' && *cp != '|' && *cp != '!' &&
1038                                 !strchr(cp, '%')) {
1039                         ct->c_storeproc = getcpy(cp);
1040                         return;
1041                 }
1042         }
1043 }
1044
1045
1046 /*
1047 ** Copy some of the header fields of the initial message/partial
1048 ** message into the header of the reassembled message.
1049 */
1050
1051 static int
1052 copy_some_headers(FILE *out, CT ct)
1053 {
1054         HF hp;
1055
1056         hp = ct->c_first_hf;  /* start at first header field */
1057
1058         while (hp) {
1059                 /*
1060                 ** A few of the header fields of the enclosing
1061                 ** messages are not copied.
1062                 */
1063                 if (!uprf(hp->name, XXX_FIELD_PRF) &&
1064                                 mh_strcasecmp(hp->name, VRSN_FIELD) &&
1065                                 mh_strcasecmp(hp->name, "Subject") &&
1066                                 mh_strcasecmp(hp->name, "Message-ID"))
1067                         fprintf(out, "%s:%s", hp->name, hp->value);
1068                 hp = hp->next;  /* next header field */
1069         }
1070
1071         return OK;
1072 }