diplodocus.org Git - nmh/blob - uip/mhstoresbr.c

   1
   2 /*
   3  * mhstoresbr.c -- routines to save/store the contents of MIME messages
   4  *
   5  * $Id$
   6  */
   7
   8 #include <h/mh.h>
   9 #include <fcntl.h>
  10 #include <h/signals.h>
  11 #include <h/md5.h>
  12 #include <errno.h>
  13 #include <setjmp.h>
  14 #include <signal.h>
  15 #include <zotnet/mts/mts.h>
  16 #include <zotnet/tws/tws.h>
  17 #include <h/mime.h>
  18 #include <h/mhparse.h>
  19
  20 extern int errno;
  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 check_folder (char *);
  75 static int output_content_folder (char *, char *);
  76 static int parse_format_string (CT, char *, char *, int, char *);
  77 static void get_storeproc (CT);
  78 static int copy_some_headers (FILE *, CT);
  79
  80
  81 /*
  82  * Main entry point to store content
  83  * from a collection of messages.
  84  */
  85
  86 void
  87 store_all_messages (CT *cts)
  88 {
  89     CT ct, *ctp;
  90     char *cp;
  91
  92     /*
  93      * Check for the directory in which to
  94      * store any contents.
  95      */
  96     if (autosw)
  97         dir = getcpy (cwd);
  98     else if ((cp = context_find (nmhstorage)) && *cp)
  99         dir = getcpy (cp);
 100     else
 101         dir = getcpy (cwd);
 102
 103     for (ctp = cts; *ctp; ctp++) {
 104         ct = *ctp;
 105         store_single_message (ct);
 106     }
 107
 108     flush_errors ();
 109 }
 110
 111
 112 /*
 113  * Entry point to store the content
 114  * in a (single) message
 115  */
 116
 117 static void
 118 store_single_message (CT ct)
 119 {
 120     if (type_ok (ct, 1)) {
 121         umask (ct->c_umask);
 122         store_switch (ct);
 123         if (ct->c_fp) {
 124             fclose (ct->c_fp);
 125             ct->c_fp = NULL;
 126         }
 127         if (ct->c_ceclosefnx)
 128             (*ct->c_ceclosefnx) (ct);
 129     }
 130 }
 131
 132
 133 /*
 134  * Switching routine to store different content types
 135  */
 136
 137 static int
 138 store_switch (CT ct)
 139 {
 140     switch (ct->c_type) {
 141         case CT_MULTIPART:
 142             return store_multi (ct);
 143             break;
 144
 145         case CT_MESSAGE:
 146             switch (ct->c_subtype) {
 147                 case MESSAGE_PARTIAL:
 148                     return store_partial (ct);
 149                     break;
 150
 151                 case MESSAGE_EXTERNAL:
 152                     return store_external (ct);
 153
 154                 case MESSAGE_RFC822:
 155                 default:
 156                     return store_generic (ct);
 157                     break;
 158             }
 159             break;
 160
 161         case CT_APPLICATION:
 162             return store_application (ct);
 163             break;
 164
 165         case CT_TEXT:
 166         case CT_AUDIO:
 167         case CT_IMAGE:
 168         case CT_VIDEO:
 169             return store_generic (ct);
 170             break;
 171
 172         default:
 173             adios (NULL, "unknown content type %d", ct->c_type);
 174             break;
 175     }
 176
 177     return OK;  /* NOT REACHED */
 178 }
 179
 180
 181 /*
 182  * Generic routine to store a MIME content.
 183  * (audio, video, image, text, message/rfc922)
 184  */
 185
 186 static int
 187 store_generic (CT ct)
 188 {
 189     /*
 190      * Check if the content specifies a filename.
 191      * Don't bother with this for type "message"
 192      * (only "message/rfc822" will use store_generic).
 193      */
 194     if (autosw && ct->c_type != CT_MESSAGE)
 195         get_storeproc (ct);
 196
 197     return store_content (ct, NULL);
 198 }
 199
 200
 201 /*
 202  * Store content of type "application"
 203  */
 204
 205 static int
 206 store_application (CT ct)
 207 {
 208     char **ap, **ep;
 209     CI ci = &ct->c_ctinfo;
 210
 211     /* Check if the content specifies a filename */
 212     if (autosw)
 213         get_storeproc (ct);
 214
 215     /*
 216      * If storeproc is not defined, and the content is type
 217      * "application/octet-stream", we also check for various
 218      * attribute/value pairs which specify if this a tar file.
 219      */
 220     if (!ct->c_storeproc && ct->c_subtype == APPLICATION_OCTETS) {
 221         int tarP = 0, zP = 0, gzP = 0;
 222
 223         for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
 224             /* check for "type=tar" attribute */
 225             if (!strcasecmp (*ap, "type")) {
 226                 if (strcasecmp (*ep, "tar"))
 227                     break;
 228
 229                 tarP = 1;
 230                 continue;
 231             }
 232
 233             /* check for "conversions=compress" attribute */
 234             if ((!strcasecmp (*ap, "conversions") || !strcasecmp (*ap, "x-conversions"))
 235                 && (!strcasecmp (*ep, "compress") || !strcasecmp (*ep, "x-compress"))) {
 236                 zP = 1;
 237                 continue;
 238             }
 239             /* check for "conversions=gzip" attribute */
 240             if ((!strcasecmp (*ap, "conversions") || !strcasecmp (*ap, "x-conversions"))
 241                 && (!strcasecmp (*ep, "gzip") || !strcasecmp (*ep, "x-gzip"))) {
 242                 gzP = 1;
 243                 continue;
 244             }
 245         }
 246
 247         if (tarP) {
 248             ct->c_showproc = add (zP ? "%euncompress | tar tvf -"
 249                                   : (gzP ? "%egzip -dc | tar tvf -"
 250                                      : "%etar tvf -"), NULL);
 251             if (!ct->c_storeproc) {
 252                 if (autosw) {
 253                     ct->c_storeproc = add (zP ? "| uncompress | tar xvpf -"
 254                                            : (gzP ? "| gzip -dc | tar xvpf -"
 255                                               : "| tar xvpf -"), NULL);
 256                     ct->c_umask = 0022;
 257                 } else {
 258                     ct->c_storeproc= add (zP ? "%m%P.tar.Z"
 259                                           : (gzP ? "%m%P.tar.gz"
 260                                              : "%m%P.tar"), NULL);
 261                 }
 262             }
 263         }
 264     }
 265
 266     return store_content (ct, NULL);
 267 }
 268
 269
 270 /*
 271  * Store the content of a multipart message
 272  */
 273
 274 static int
 275 store_multi (CT ct)
 276 {
 277     int result;
 278     struct multipart *m = (struct multipart *) ct->c_ctparams;
 279     struct part *part;
 280
 281     result = NOTOK;
 282     for (part = m->mp_parts; part; part = part->mp_next) {
 283         CT  p = part->mp_part;
 284
 285         if (part_ok (p, 1) && type_ok (p, 1)) {
 286             result = store_switch (p);
 287             if (result == OK && ct->c_subtype == MULTI_ALTERNATE)
 288                 break;
 289         }
 290     }
 291
 292     return result;
 293 }
 294
 295
 296 /*
 297  * Reassemble and store the contents of a collection
 298  * of messages of type "message/partial".
 299  */
 300
 301 static int
 302 store_partial (CT ct)
 303 {
 304     int cur, hi, i;
 305     CT p, *ctp, *ctq;
 306     CT *base;
 307     struct partial *pm, *qm;
 308
 309     qm = (struct partial *) ct->c_ctparams;
 310     if (qm->pm_stored)
 311         return OK;
 312
 313     hi = i = 0;
 314     for (ctp = cts; *ctp; ctp++) {
 315         p = *ctp;
 316         if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 317             pm = (struct partial *) p->c_ctparams;
 318             if (!pm->pm_stored
 319                     && strcmp (qm->pm_partid, pm->pm_partid) == 0) {
 320                 pm->pm_marked = pm->pm_partno;
 321                 if (pm->pm_maxno)
 322                     hi = pm->pm_maxno;
 323                 pm->pm_stored = 1;
 324                 i++;
 325             }
 326             else
 327                 pm->pm_marked = 0;
 328         }
 329     }
 330
 331     if (hi == 0) {
 332         advise (NULL, "missing (at least) last part of multipart message");
 333         return NOTOK;
 334     }
 335
 336     if ((base = (CT *) calloc ((size_t) (i + 1), sizeof(*base))) == NULL)
 337         adios (NULL, "out of memory");
 338
 339     ctq = base;
 340     for (ctp = cts; *ctp; ctp++) {
 341         p = *ctp;
 342         if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 343             pm = (struct partial *) p->c_ctparams;
 344             if (pm->pm_marked)
 345                 *ctq++ = p;
 346         }
 347     }
 348     *ctq = NULL;
 349
 350     if (i > 1)
 351         qsort ((char *) base, i, sizeof(*base), (qsort_comp) ct_compar);
 352
 353     cur = 1;
 354     for (ctq = base; *ctq; ctq++) {
 355         p = *ctq;
 356         pm = (struct partial *) p->c_ctparams;
 357         if (pm->pm_marked != cur) {
 358             if (pm->pm_marked == cur - 1) {
 359                 admonish (NULL,
 360                           "duplicate part %d of %d part multipart message",
 361                           pm->pm_marked, hi);
 362                 continue;
 363             }
 364
 365 missing_part:
 366             advise (NULL,
 367                     "missing %spart %d of %d part multipart message",
 368                     cur != hi ? "(at least) " : "", cur, hi);
 369             goto losing;
 370         }
 371         else
 372             cur++;
 373     }
 374     if (hi != --cur) {
 375         cur = hi;
 376         goto missing_part;
 377     }
 378
 379     /*
 380      * Now cycle through the sorted list of messages of type
 381      * "message/partial" and save/append them to a file.
 382      */
 383
 384     ctq = base;
 385     ct = *ctq++;
 386     if (store_content (ct, NULL) == NOTOK) {
 387 losing:
 388         free ((char *) base);
 389         return NOTOK;
 390     }
 391
 392     for (; *ctq; ctq++) {
 393         p = *ctq;
 394         if (store_content (p, ct) == NOTOK)
 395             goto losing;
 396     }
 397
 398     free ((char *) base);
 399     return OK;
 400 }
 401
 402
 403 /*
 404  * Store content from a message of type "message/external".
 405  */
 406
 407 static int
 408 store_external (CT ct)
 409 {
 410     int result = NOTOK;
 411     struct exbody *e = (struct exbody *) ct->c_ctparams;
 412     CT p = e->eb_content;
 413
 414     if (!type_ok (p, 1))
 415         return OK;
 416
 417     /*
 418      * Check if the parameters for the external body
 419      * specified a filename.
 420      */
 421     if (autosw) {
 422         char *cp;
 423
 424         if ((cp = e->eb_name)
 425             && *cp != '/'
 426             && *cp != '.'
 427             && *cp != '|'
 428             && *cp != '!'
 429             && !strchr (cp, '%')) {
 430             if (!ct->c_storeproc)
 431                 ct->c_storeproc = add (cp, NULL);
 432             if (!p->c_storeproc)
 433                 p->c_storeproc = add (cp, NULL);
 434         }
 435     }
 436
 437     /*
 438      * Since we will let the Content structure for the
 439      * external body substitute for the current content,
 440      * we temporarily change its partno (number inside
 441      * multipart), so everything looks right.
 442      */
 443     p->c_partno = ct->c_partno;
 444
 445     /* we probably need to check if content is really there */
 446     result = store_switch (p);
 447
 448     p->c_partno = NULL;
 449     return result;
 450 }
 451
 452
 453 /*
 454  * Compare the numbering from two different
 455  * message/partials (needed for sorting).
 456  */
 457
 458 static int
 459 ct_compar (CT *a, CT *b)
 460 {
 461     struct partial *am = (struct partial *) ((*a)->c_ctparams);
 462     struct partial *bm = (struct partial *) ((*b)->c_ctparams);
 463
 464     return (am->pm_marked - bm->pm_marked);
 465 }
 466
 467
 468 /*
 469  * Store contents of a message or message part to
 470  * a folder, a file, the standard output, or pass
 471  * the contents to a command.
 472  *
 473  * If the current content to be saved is a followup part
 474  * to a collection of messages of type "message/partial",
 475  * then field "p" is a pointer to the Content structure
 476  * to the first message/partial in the group.
 477  */
 478
 479 static int
 480 store_content (CT ct, CT p)
 481 {
 482     int appending = 0, msgnum;
 483     int is_partial = 0, first_partial = 0;
 484     int last_partial = 0;
 485     char *cp, buffer[BUFSIZ];
 486
 487     /*
 488      * Do special processing for messages of
 489      * type "message/partial".
 490      *
 491      * We first check if this content is of type
 492      * "message/partial".  If it is, then we need to check
 493      * whether it is the first and/or last in the group.
 494      *
 495      * Then if "p" is a valid pointer, it points to the Content
 496      * structure of the first partial in the group.  So we copy
 497      * the file name and/or folder name from that message.  In
 498      * this case, we also note that we will be appending.
 499      */
 500     if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 501         struct partial *pm = (struct partial *) ct->c_ctparams;
 502
 503         /* Yep, it's a message/partial */
 504         is_partial = 1;
 505
 506         /* But is it the first and/or last in the collection? */
 507         if (pm->pm_partno == 1)
 508             first_partial = 1;
 509         if (pm->pm_maxno && pm->pm_partno == pm->pm_maxno)
 510             last_partial = 1;
 511
 512         /*
 513          * If "p" is a valid pointer, then it points to the
 514          * Content structure for the first message in the group.
 515          * So we just copy the filename or foldername information
 516          * from the previous iteration of this function.
 517          */
 518         if (p) {
 519             appending = 1;
 520             ct->c_storage = add (p->c_storage, NULL);
 521
 522             /* record the folder name */
 523             if (p->c_folder) {
 524                 ct->c_folder = add (p->c_folder, NULL);
 525             }
 526             goto got_filename;
 527         }
 528     }
 529
 530     /*
 531      * Get storage formatting string.
 532      *
 533      * 1) If we have storeproc defined, then use that
 534      * 2) Else check for a mhn-store-<type>/<subtype> entry
 535      * 3) Else check for a mhn-store-<type> entry
 536      * 4) Else if content is "message", use "+" (current folder)
 537      * 5) Else use string "%m%P.%s".
 538      */
 539     if ((cp = ct->c_storeproc) == NULL || *cp == '\0') {
 540         CI ci = &ct->c_ctinfo;
 541
 542         snprintf (buffer, sizeof(buffer), "%s-store-%s/%s",
 543                 invo_name, ci->ci_type, ci->ci_subtype);
 544         if ((cp = context_find (buffer)) == NULL || *cp == '\0') {
 545             snprintf (buffer, sizeof(buffer), "%s-store-%s", invo_name, ci->ci_type);
 546             if ((cp = context_find (buffer)) == NULL || *cp == '\0') {
 547                 cp = ct->c_type == CT_MESSAGE ? "+" : "%m%P.%s";
 548             }
 549         }
 550     }
 551
 552     /*
 553      * Check the beginning of storage formatting string
 554      * to see if we are saving content to a folder.
 555      */
 556     if (*cp == '+' || *cp == '@') {
 557         char *tmpfilenam, *folder;
 558
 559         /* Store content in temporary file for now */
 560         tmpfilenam = m_scratch ("", invo_name);
 561         ct->c_storage = add (tmpfilenam, NULL);
 562
 563         /* Get the folder name */
 564         if (cp[1])
 565             folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
 566         else
 567             folder = getfolder (1);
 568
 569         /* Check if folder exists */
 570         if (check_folder (folder) == NOTOK)
 571             return NOTOK;
 572
 573         /* Record the folder name */
 574         ct->c_folder = add (folder, NULL);
 575
 576         if (cp[1])
 577             free (folder);
 578
 579         goto got_filename;
 580     }
 581
 582     /*
 583      * Parse and expand the storage formatting string
 584      * in `cp' into `buffer'.
 585      */
 586     parse_format_string (ct, cp, buffer, sizeof(buffer), dir);
 587
 588     /*
 589      * If formatting begins with '|' or '!', then pass
 590      * content to standard input of a command and return.
 591      */
 592     if (buffer[0] == '|' || buffer[0] == '!')
 593         return show_content_aux (ct, 1, 0, buffer + 1, dir);
 594
 595     /* record the filename */
 596     ct->c_storage = add (buffer, NULL);
 597
 598 got_filename:
 599     /* flush the output stream */
 600     fflush (stdout);
 601
 602     /* Now save or append the content to a file */
 603     if (output_content_file (ct, appending) == NOTOK)
 604         return NOTOK;
 605
 606     /*
 607      * If necessary, link the file into a folder and remove
 608      * the temporary file.  If this message is a partial,
 609      * then only do this if it is the last one in the group.
 610      */
 611     if (ct->c_folder && (!is_partial || last_partial)) {
 612         msgnum = output_content_folder (ct->c_folder, ct->c_storage);
 613         unlink (ct->c_storage);
 614         if (msgnum == NOTOK)
 615             return NOTOK;
 616     }
 617
 618     /*
 619      * Now print out the name/number of the message
 620      * that we are storing.
 621      */
 622     if (is_partial) {
 623         if (first_partial)
 624             fprintf (stderr, "reassembling partials ");
 625         if (last_partial)
 626             fprintf (stderr, "%s", ct->c_file);
 627         else
 628             fprintf (stderr, "%s,", ct->c_file);
 629     } else {
 630         fprintf (stderr, "storing message %s", ct->c_file);
 631         if (ct->c_partno)
 632             fprintf (stderr, " part %s", ct->c_partno);
 633     }
 634
 635     /*
 636      * Unless we are in the "middle" of group of message/partials,
 637      * we now print the name of the file, folder, and/or message
 638      * to which we are storing the content.
 639      */
 640     if (!is_partial || last_partial) {
 641         if (ct->c_folder) {
 642             fprintf (stderr, " to folder %s as message %d\n", ct->c_folder, msgnum);
 643         } else if (!strcmp(ct->c_storage, "-")) {
 644             fprintf (stderr, " to stdout\n");
 645         } else {
 646             int cwdlen;
 647
 648             cwdlen = strlen (cwd);
 649             fprintf (stderr, " as file %s\n",
 650                 strncmp (ct->c_storage, cwd, cwdlen)
 651                 || ct->c_storage[cwdlen] != '/'
 652                 ? ct->c_storage : ct->c_storage + cwdlen + 1);
 653         }
 654     }
 655
 656     return OK;
 657 }
 658
 659
 660 /*
 661  * Output content to a file
 662  */
 663
 664 static int
 665 output_content_file (CT ct, int appending)
 666 {
 667     int filterstate;
 668     char *file, buffer[BUFSIZ];
 669     long pos, last;
 670     FILE *fp;
 671
 672     /*
 673      * If the pathname is absolute, make sure
 674      * all the relevant directories exist.
 675      */
 676     if (strchr(ct->c_storage, '/')
 677             && make_intermediates (ct->c_storage) == NOTOK)
 678         return NOTOK;
 679
 680     if (ct->c_encoding != CE_7BIT) {
 681         int cc, fd;
 682
 683         if (!ct->c_ceopenfnx) {
 684             advise (NULL, "don't know how to decode part %s of message %s",
 685                     ct->c_partno, ct->c_file);
 686             return NOTOK;
 687         }
 688
 689         file = appending || !strcmp (ct->c_storage, "-") ? NULL
 690                                                            : ct->c_storage;
 691         if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
 692             return NOTOK;
 693         if (!strcmp (file, ct->c_storage)) {
 694             (*ct->c_ceclosefnx) (ct);
 695             return OK;
 696         }
 697
 698         /*
 699          * Send to standard output
 700          */
 701         if (!strcmp (ct->c_storage, "-")) {
 702             int gd;
 703
 704             if ((gd = dup (fileno (stdout))) == NOTOK) {
 705                 advise ("stdout", "unable to dup");
 706 losing:
 707                 (*ct->c_ceclosefnx) (ct);
 708                 return NOTOK;
 709             }
 710             if ((fp = fdopen (gd, appending ? "a" : "w")) == NULL) {
 711                 advise ("stdout", "unable to fdopen (%d, \"%s\") from", gd,
 712                         appending ? "a" : "w");
 713                 close (gd);
 714                 goto losing;
 715             }
 716         } else {
 717             /*
 718              * Open output file
 719              */
 720             if ((fp = fopen (ct->c_storage, appending ? "a" : "w")) == NULL) {
 721                 advise (ct->c_storage, "unable to fopen for %s",
 722                         appending ? "appending" : "writing");
 723                 goto losing;
 724             }
 725         }
 726
 727         /*
 728          * Filter the header fields of the initial enclosing
 729          * message/partial into the file.
 730          */
 731         if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 732             struct partial *pm = (struct partial *) ct->c_ctparams;
 733
 734             if (pm->pm_partno == 1)
 735                 copy_some_headers (fp, ct);
 736         }
 737
 738         for (;;) {
 739             switch (cc = read (fd, buffer, sizeof(buffer))) {
 740                 case NOTOK:
 741                     advise (file, "error reading content from");
 742                     break;
 743
 744                 case OK:
 745                     break;
 746
 747                 default:
 748                     fwrite (buffer, sizeof(*buffer), cc, fp);
 749                     continue;
 750             }
 751             break;
 752         }
 753
 754         (*ct->c_ceclosefnx) (ct);
 755
 756         if (cc != NOTOK && fflush (fp))
 757             advise (ct->c_storage, "error writing to");
 758
 759         fclose (fp);
 760
 761         return (cc != NOTOK ? OK : NOTOK);
 762     }
 763
 764     if (!ct->c_fp && (ct->c_fp = fopen (ct->c_file, "r")) == NULL) {
 765         advise (ct->c_file, "unable to open for reading");
 766         return NOTOK;
 767     }
 768
 769     pos = ct->c_begin;
 770     last = ct->c_end;
 771     fseek (ct->c_fp, pos, SEEK_SET);
 772
 773     if (!strcmp (ct->c_storage, "-")) {
 774         int gd;
 775
 776         if ((gd = dup (fileno (stdout))) == NOTOK) {
 777             advise ("stdout", "unable to dup");
 778             return NOTOK;
 779         }
 780         if ((fp = fdopen (gd, appending ? "a" : "w")) == NULL) {
 781             advise ("stdout", "unable to fdopen (%d, \"%s\") from", gd,
 782                     appending ? "a" : "w");
 783             close (gd);
 784             return NOTOK;
 785         }
 786     } else {
 787         if ((fp = fopen (ct->c_storage, appending ? "a" : "w")) == NULL) {
 788             advise (ct->c_storage, "unable to fopen for %s",
 789                     appending ? "appending" : "writing");
 790             return NOTOK;
 791         }
 792     }
 793
 794     /*
 795      * Copy a few of the header fields of the initial
 796      * enclosing message/partial into the file.
 797      */
 798     filterstate = 0;
 799     if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 800         struct partial *pm = (struct partial *) ct->c_ctparams;
 801
 802         if (pm->pm_partno == 1) {
 803             copy_some_headers (fp, ct);
 804             filterstate = 1;
 805         }
 806     }
 807
 808     while (fgets (buffer, sizeof(buffer) - 1, ct->c_fp)) {
 809         if ((pos += strlen (buffer)) > last) {
 810             int diff;
 811
 812             diff = strlen (buffer) - (pos - last);
 813             if (diff >= 0)
 814                 buffer[diff] = '\0';
 815         }
 816         /*
 817          * If this is the first content of a group of
 818          * message/partial contents, then we only copy a few
 819          * of the header fields of the enclosed message.
 820          */
 821         if (filterstate) {
 822             switch (buffer[0]) {
 823                 case ' ':
 824                 case '\t':
 825                     if (filterstate < 0)
 826                         buffer[0] = 0;
 827                     break;
 828
 829                 case '\n':
 830                     filterstate = 0;
 831                     break;
 832
 833                 default:
 834                     if (!uprf (buffer, XXX_FIELD_PRF)
 835                             && !uprf (buffer, VRSN_FIELD)
 836                             && !uprf (buffer, "Subject:")
 837                             && !uprf (buffer, "Encrypted:")
 838                             && !uprf (buffer, "Message-ID:")) {
 839                         filterstate = -1;
 840                         buffer[0] = 0;
 841                         break;
 842                     }
 843                     filterstate = 1;
 844                     break;
 845             }
 846         }
 847         fputs (buffer, fp);
 848         if (pos >= last)
 849             break;
 850     }
 851
 852     if (fflush (fp))
 853         advise (ct->c_storage, "error writing to");
 854
 855     fclose (fp);
 856     fclose (ct->c_fp);
 857     ct->c_fp = NULL;
 858     return OK;
 859 }
 860
 861
 862 /*
 863  * Check if folder exists, and create
 864  * if necessary.
 865  */
 866
 867 static int
 868 check_folder (char *folder)
 869 {
 870     char *folderdir;
 871     struct stat st;
 872
 873     /* expand path to the folder */
 874     folderdir = m_mailpath (folder);
 875
 876     /* Check if folder exists */
 877     if (stat (folderdir, &st) == NOTOK) {
 878         int answer;
 879         char *ep;
 880
 881         if (errno != ENOENT) {
 882             advise (folderdir, "error on folder");
 883             return NOTOK;
 884         }
 885
 886         ep = concat ("Create folder \"", folderdir, "\"? ", NULL);
 887         answer = getanswer (ep);
 888         free (ep);
 889
 890         if (!answer)
 891             return NOTOK;
 892
 893         if (!makedir (folderdir)) {
 894             advise (NULL, "unable to create folder %s", folderdir);
 895             return NOTOK;
 896         }
 897     }
 898
 899     return OK;
 900 }
 901
 902
 903 /*
 904  * Add a file to a folder.
 905  *
 906  * Return the new message number of the file
 907  * when added to the folder.  Return -1, if
 908  * there is an error.
 909  */
 910
 911 static int
 912 output_content_folder (char *folder, char *filename)
 913 {
 914     int msgnum;
 915     struct msgs *mp;
 916
 917     /* Read the folder. */
 918     if ((mp = folder_read (folder))) {
 919         /* Link file into folder */
 920         msgnum = folder_addmsg (&mp, filename, 0, 0, 0);
 921     } else {
 922         advise (NULL, "unable to read folder %s", folder);
 923         return NOTOK;
 924     }
 925
 926     /* free folder structure */
 927     folder_free (mp);
 928
 929     /*
 930      * Return msgnum.  We are relying on the fact that
 931      * msgnum will be -1, if folder_addmsg() had an error.
 932      */
 933     return msgnum;
 934 }
 935
 936
 937 /*
 938  * Parse and expand the storage formatting string
 939  * pointed to by "cp" into "buffer".
 940  */
 941
 942 static int
 943 parse_format_string (CT ct, char *cp, char *buffer, int buflen, char *dir)
 944 {
 945     int len;
 946     char *bp;
 947     CI ci = &ct->c_ctinfo;
 948
 949     /*
 950      * If storage string is "-", just copy it, and
 951      * return (send content to standard output).
 952      */
 953     if (cp[0] == '-' && cp[1] == '\0') {
 954         strncpy (buffer, cp, buflen);
 955         return 0;
 956     }
 957
 958     bp = buffer;
 959     bp[0] = '\0';
 960
 961     /*
 962      * If formatting string is a pathname that doesn't
 963      * begin with '/', then preface the path with the
 964      * appropriate directory.
 965      */
 966     if (*cp != '/' && *cp != '|' && *cp != '!') {
 967         snprintf (bp, buflen, "%s/", dir[1] ? dir : "");
 968         len = strlen (bp);
 969         bp += len;
 970         buflen -= len;
 971     }
 972
 973     for (; *cp; cp++) {
 974
 975         /* We are processing a storage escape */
 976         if (*cp == '%') {
 977             switch (*++cp) {
 978                 case 'a':
 979                     /*
 980                      * Insert parameters from Content-Type.
 981                      * This is only valid for '|' commands.
 982                      */
 983                     if (buffer[0] != '|' && buffer[0] != '!') {
 984                         *bp++ = *--cp;
 985                         *bp = '\0';
 986                         buflen--;
 987                         continue;
 988                     } else {
 989                         char **ap, **ep;
 990                         char *s = "";
 991
 992                         for (ap = ci->ci_attrs, ep = ci->ci_values;
 993                                  *ap; ap++, ep++) {
 994                             snprintf (bp, buflen, "%s%s=\"%s\"", s, *ap, *ep);
 995                             len = strlen (bp);
 996                             bp += len;
 997                             buflen -= len;
 998                             s = " ";
 999                         }
1000                     }
1001                     break;
1002
1003                 case 'm':
1004                     /* insert message number */
1005                     snprintf (bp, buflen, "%s", r1bindex (ct->c_file, '/'));
1006                     break;
1007
1008                 case 'P':
1009                     /* insert part number with leading dot */
1010                     if (ct->c_partno)
1011                         snprintf (bp, buflen, ".%s", ct->c_partno);
1012                     break;
1013
1014                 case 'p':
1015                     /* insert part number withouth leading dot */
1016                     if (ct->c_partno)
1017                         strncpy (bp, ct->c_partno, buflen);
1018                     break;
1019
1020                 case 't':
1021                     /* insert content type */
1022                     strncpy (bp, ci->ci_type, buflen);
1023                     break;
1024
1025                 case 's':
1026                     /* insert content subtype */
1027                     strncpy (bp, ci->ci_subtype, buflen);
1028                     break;
1029
1030                 case '%':
1031                     /* insert the character % */
1032                     goto raw;
1033
1034                 default:
1035                     *bp++ = *--cp;
1036                     *bp = '\0';
1037                     buflen--;
1038                     continue;
1039             }
1040
1041             /* Advance bp and decrement buflen */
1042             len = strlen (bp);
1043             bp += len;
1044             buflen -= len;
1045
1046         } else {
1047 raw:
1048             *bp++ = *cp;
1049             *bp = '\0';
1050             buflen--;
1051         }
1052     }
1053
1054     return 0;
1055 }
1056
1057
1058 /*
1059  * Check if the content specifies a filename
1060  * in its MIME parameters.
1061  */
1062
1063 static void
1064 get_storeproc (CT ct)
1065 {
1066     char **ap, **ep, *cp;
1067     CI ci = &ct->c_ctinfo;
1068
1069     /*
1070      * If the storeproc has already been defined,
1071      * we just return (for instance, if this content
1072      * is part of a "message/external".
1073      */
1074     if (ct->c_storeproc)
1075         return;
1076
1077     /*
1078      * Check the attribute/value pairs, for the attribute "name".
1079      * If found, do a few sanity checks and copy the value into
1080      * the storeproc.
1081      */
1082     for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
1083         if (!strcasecmp (*ap, "name")
1084             && *(cp = *ep) != '/'
1085             && *cp != '.'
1086             && *cp != '|'
1087             && *cp != '!'
1088             && !strchr (cp, '%')) {
1089             ct->c_storeproc = add (cp, NULL);
1090             return;
1091         }
1092     }
1093 }
1094
1095
1096 /*
1097  * Copy some of the header fields of the initial message/partial
1098  * message into the header of the reassembled message.
1099  */
1100
1101 static int
1102 copy_some_headers (FILE *out, CT ct)
1103 {
1104     HF hp;
1105
1106     hp = ct->c_first_hf;        /* start at first header field */
1107
1108     while (hp) {
1109         /*
1110          * A few of the header fields of the enclosing
1111          * messages are not copied.
1112          */
1113         if (!uprf (hp->name, XXX_FIELD_PRF)
1114                 && strcasecmp (hp->name, VRSN_FIELD)
1115                 && strcasecmp (hp->name, "Subject")
1116                 && strcasecmp (hp->name, "Encrypted")
1117                 && strcasecmp (hp->name, "Message-ID"))
1118             fprintf (out, "%s:%s", hp->name, hp->value);
1119         hp = hp->next;  /* next header field */
1120     }
1121
1122     return OK;
1123 }