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

   1 /*
   2 ** mhstore.c -- 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 <errno.h>
  13 #include <signal.h>
  14 #include <h/tws.h>
  15 #include <h/mime.h>
  16 #include <h/mhparse.h>
  17 #include <h/utils.h>
  18 #include <unistd.h>
  19 #include <sys/stat.h>
  20 #include <locale.h>
  21 #include <sysexits.h>
  22
  23 static struct swit switches[] = {
  24 #define AUTOSW  0
  25         { "auto", 0 },
  26 #define NAUTOSW  1
  27         { "noauto", 2 },
  28 #define FILESW  2  /* interface from show */
  29         { "file file", 0 },
  30 #define PARTSW  3
  31         { "part number", 0 },
  32 #define TYPESW  4
  33         { "type content", 0 },
  34 #define VERSIONSW  5
  35         { "Version", 0 },
  36 #define HELPSW  6
  37         { "help", 0 },
  38 #define DEBUGSW  7
  39         { "debug", -5 },
  40         { NULL, 0 }
  41 };
  42
  43
  44 /* mhparse.c */
  45 extern char *tmp;  /* directory to place temp files */
  46
  47 /* mhmisc.c */
  48 extern int npart;
  49 extern int ntype;
  50 extern char *parts[NPARTS + 1];
  51 extern char *types[NTYPES + 1];
  52 extern int userrs;
  53
  54 int debugsw = 0;
  55
  56 #define quitser pipeser
  57
  58 /* mhparse.c */
  59 CT parse_mime(char *);
  60
  61 /* mhmisc.c */
  62 int part_ok(CT, int);
  63 int type_ok(CT, int);
  64 void set_endian(void);
  65 void flush_errors(void);
  66
  67 /* mhfree.c */
  68 void free_content(CT);
  69 extern CT *cts;  /* The list of top-level contents to display */
  70 void freects_done();
  71
  72 /*
  73 ** static prototypes
  74 */
  75 static void pipeser(int);
  76
  77 int autosw = 1;
  78
  79 /*
  80 ** Cache of current directory.  This must be
  81 ** set before these routines are called.
  82 */
  83 char *cwd;
  84
  85 /*
  86 ** The directory in which to store the contents.
  87 */
  88 static char *dir;
  89
  90 /*
  91 ** Type for a compare function for qsort.  This keeps
  92 ** the compiler happy.
  93 */
  94 typedef int (*qsort_comp) (const void *, const void *);
  95
  96
  97 /* mhmisc.c */
  98 int part_ok(CT, int);
  99 int type_ok(CT, int);
 100 int make_intermediates(char *);
 101 void flush_errors(void);
 102
 103 /* mhshowsbr.c */
 104 int show_content_aux(CT, int, char *, char *);
 105
 106 /*
 107 ** static prototypes
 108 */
 109 static void store_single_message(CT);
 110 static int store_switch(CT);
 111 static int store_generic(CT);
 112 static int store_multi(CT);
 113 static int store_partial(CT);
 114 static int store_external(CT);
 115 static int ct_compar(CT *, CT *);
 116 static int store_content(CT, CT);
 117 static int output_content_file(CT, int);
 118 static int output_content_folder(char *, char *);
 119 static int parse_format_string(CT, char *, char *, int, char *);
 120 static int copy_some_headers(FILE *, CT);
 121 static void store_all_messages(CT *);
 122
 123
 124 int
 125 main(int argc, char **argv)
 126 {
 127         int msgnum;
 128         char *cp, *file = NULL, *folder = NULL;
 129         char *maildir, buf[100], **argp;
 130         char **arguments;
 131         struct msgs_array msgs = { 0, 0, NULL };
 132         struct msgs *mp = NULL;
 133         CT ct, *ctp;
 134         FILE *fp;
 135
 136         if (atexit(freects_done) != 0) {
 137                 adios(EX_OSERR, NULL, "atexit failed");
 138         }
 139
 140         setlocale(LC_ALL, "");
 141         invo_name = mhbasename(argv[0]);
 142
 143         /* read user profile/context */
 144         context_read();
 145
 146         arguments = getarguments(invo_name, argc, argv, 1);
 147         argp = arguments;
 148
 149         /*
 150         ** Parse arguments
 151         */
 152         while ((cp = *argp++)) {
 153                 if (*cp == '-') {
 154                         switch (smatch(++cp, switches)) {
 155                         case AMBIGSW:
 156                                 ambigsw(cp, switches);
 157                                 exit(EX_USAGE);
 158                         case UNKWNSW:
 159                                 adios(EX_USAGE, NULL, "-%s unknown", cp);
 160
 161                         case HELPSW:
 162                                 snprintf(buf, sizeof(buf), "%s [+folder] [msgs] [switches]", invo_name);
 163                                 print_help(buf, switches, 1);
 164                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 165                         case VERSIONSW:
 166                                 print_version(invo_name);
 167                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 168
 169                         case AUTOSW:
 170                                 autosw++;
 171                                 continue;
 172                         case NAUTOSW:
 173                                 autosw = 0;
 174                                 continue;
 175
 176                         case PARTSW:
 177                                 if (!(cp = *argp++) || *cp == '-')
 178                                         adios(EX_USAGE, NULL, "missing argument to %s",
 179                                                         argp[-2]);
 180                                 if (npart >= NPARTS)
 181                                         adios(EX_USAGE, NULL, "too many parts (starting with %s), %d max", cp, NPARTS);
 182                                 parts[npart++] = cp;
 183                                 continue;
 184
 185                         case TYPESW:
 186                                 if (!(cp = *argp++) || *cp == '-')
 187                                         adios(EX_USAGE, NULL, "missing argument to %s",
 188                                                         argp[-2]);
 189                                 if (ntype >= NTYPES)
 190                                         adios(EX_USAGE, NULL, "too many types (starting with %s), %d max", cp, NTYPES);
 191                                 types[ntype++] = cp;
 192                                 continue;
 193
 194                         case FILESW:
 195                                 if (!(cp = *argp++) || (*cp == '-' && cp[1]))
 196                                         adios(EX_USAGE, NULL, "missing argument to %s",
 197                                                         argp[-2]);
 198                                 file = *cp == '-' ? cp : mh_xstrdup(expanddir(cp));
 199                                 continue;
 200
 201                         case DEBUGSW:
 202                                 debugsw = 1;
 203                                 continue;
 204                         }
 205                 }
 206                 if (*cp == '+' || *cp == '@') {
 207                         if (folder)
 208                                 adios(EX_USAGE, NULL, "only one folder at a time!");
 209                         else
 210                                 folder = mh_xstrdup(expandfol(cp));
 211                 } else
 212                         app_msgarg(&msgs, cp);
 213         }
 214
 215         /* null terminate the list of acceptable parts/types */
 216         parts[npart] = NULL;
 217         types[ntype] = NULL;
 218
 219         set_endian();
 220
 221         /*
 222         ** Check if we've specified an additional profile
 223         */
 224         if ((cp = getenv("MHSTORE"))) {
 225                 if ((fp = fopen(cp, "r"))) {
 226                         readconfig((struct node **) 0, fp, cp, 0);
 227                         fclose(fp);
 228                 } else {
 229                         admonish("", "unable to read $MHSTORE profile (%s)",
 230                                         cp);
 231                 }
 232         }
 233
 234         /*
 235         ** Read the standard profile setup
 236         */
 237         if ((fp = fopen(cp = etcpath("mhn.defaults"), "r"))) {
 238                 readconfig((struct node **) 0, fp, cp, 0);
 239                 fclose(fp);
 240         }
 241
 242         /*
 243         ** Cache the current directory before we do any chdirs()'s.
 244         */
 245         cwd = mh_xstrdup(pwd());
 246
 247         /*
 248         ** Check for storage directory.  If specified,
 249         ** then store temporary files there.  Else we
 250         ** store them in standard nmh directory.
 251         */
 252         if ((cp = context_find(nmhstorage)) && *cp)
 253                 tmp = concat(cp, "/", invo_name, NULL);
 254         else
 255                 tmp = mh_xstrdup(toabsdir(invo_name));
 256
 257         if (file && msgs.size)
 258                 adios(EX_USAGE, NULL, "cannot specify msg and file at same time!");
 259
 260         /*
 261         ** check if message is coming from file
 262         */
 263         if (file) {
 264                 cts = mh_xcalloc(2, sizeof(*cts));
 265                 ctp = cts;
 266
 267                 if ((ct = parse_mime(file)))
 268                         *ctp++ = ct;
 269         } else {
 270                 /*
 271                 ** message(s) are coming from a folder
 272                 */
 273                 if (!msgs.size)
 274                         app_msgarg(&msgs, seq_cur);
 275                 if (!folder)
 276                         folder = getcurfol();
 277                 maildir = toabsdir(folder);
 278
 279                 if (chdir(maildir) == NOTOK)
 280                         adios(EX_OSERR, maildir, "unable to change directory to");
 281
 282                 /* read folder and create message structure */
 283                 if (!(mp = folder_read(folder)))
 284                         adios(EX_IOERR, NULL, "unable to read folder %s", folder);
 285
 286                 /* check for empty folder */
 287                 if (mp->nummsg == 0)
 288                         adios(EX_DATAERR, NULL, "no messages in %s", folder);
 289
 290                 /* parse all the message ranges/sequences and set SELECTED */
 291                 for (msgnum = 0; msgnum < msgs.size; msgnum++)
 292                         if (!m_convert(mp, msgs.msgs[msgnum]))
 293                                 exit(EX_USAGE);
 294                 seq_setprev(mp);  /* set the previous-sequence */
 295
 296                 cts = mh_xcalloc(mp->numsel + 1, sizeof(*cts));
 297                 ctp = cts;
 298
 299                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 300                         if (is_selected(mp, msgnum)) {
 301                                 char *msgnam;
 302
 303                                 msgnam = m_name(msgnum);
 304                                 if ((ct = parse_mime(msgnam)))
 305                                         *ctp++ = ct;
 306                         }
 307                 }
 308         }
 309
 310         if (!*cts)
 311                 exit(EX_SOFTWARE);
 312
 313         userrs = 1;
 314         SIGNAL(SIGQUIT, quitser);
 315         SIGNAL(SIGPIPE, pipeser);
 316
 317         /*
 318         ** Get the associated umask for the relevant contents.
 319         */
 320         for (ctp = cts; *ctp; ctp++) {
 321                 struct stat st;
 322
 323                 ct = *ctp;
 324                 if (type_ok(ct, 1) && !ct->c_umask) {
 325                         if (stat(ct->c_file, &st) != NOTOK)
 326                                 ct->c_umask = ~(st.st_mode & 0777);
 327                         else
 328                                 ct->c_umask = ~m_gmprot();
 329                 }
 330         }
 331
 332         /*
 333         ** Store the message content
 334         */
 335         store_all_messages(cts);
 336
 337         /* Now free all the structures for the content */
 338         for (ctp = cts; *ctp; ctp++)
 339                 free_content(*ctp);
 340
 341         mh_free0(&cts);
 342
 343         /* If reading from a folder, do some updating */
 344         if (mp) {
 345                 context_replace(curfolder, folder); /* update current folder */
 346                 seq_setcur(mp, mp->hghsel);  /* update current message */
 347                 seq_save(mp);  /* synchronize sequences  */
 348                 context_save();  /* save the context file  */
 349         }
 350
 351         return 0;
 352 }
 353
 354
 355 static void
 356 pipeser(int i)
 357 {
 358         if (i == SIGQUIT) {
 359                 unlink("core");
 360                 fflush(stdout);
 361                 fprintf(stderr, "\n");
 362                 fflush(stderr);
 363                 exit(EX_TEMPFAIL);
 364         }
 365
 366         exit(EX_IOERR);
 367         /* NOTREACHED */
 368 }
 369
 370
 371 /*
 372 ** Main entry point to store content from a collection of messages.
 373 */
 374 static void
 375 store_all_messages(CT *cts)
 376 {
 377         CT ct, *ctp;
 378         char *cp;
 379
 380         /*
 381         ** Check for the directory in which to
 382         ** store any contents.
 383         */
 384         if ((cp = context_find(nmhstorage)) && *cp)
 385                 dir = mh_xstrdup(cp);
 386         else
 387                 dir = mh_xstrdup(cwd);
 388
 389         for (ctp = cts; *ctp; ctp++) {
 390                 ct = *ctp;
 391                 store_single_message(ct);
 392         }
 393
 394         flush_errors();
 395 }
 396
 397
 398 /*
 399 ** Entry point to store the content
 400 ** in a (single) message
 401 */
 402
 403 static void
 404 store_single_message(CT ct)
 405 {
 406         if (type_ok(ct, 1)) {
 407                 umask(ct->c_umask);
 408                 store_switch(ct);
 409                 if (ct->c_fp) {
 410                         fclose(ct->c_fp);
 411                         ct->c_fp = NULL;
 412                 }
 413                 if (ct->c_ceclosefnx)
 414                         (*ct->c_ceclosefnx) (ct);
 415         }
 416 }
 417
 418
 419 /*
 420 ** Switching routine to store different content types
 421 */
 422
 423 static int
 424 store_switch(CT ct)
 425 {
 426         switch (ct->c_type) {
 427         case CT_MULTIPART:
 428                 return store_multi(ct);
 429                 break;
 430
 431         case CT_MESSAGE:
 432                 switch (ct->c_subtype) {
 433                 case MESSAGE_PARTIAL:
 434                         return store_partial(ct);
 435                         break;
 436
 437                 case MESSAGE_EXTERNAL:
 438                         return store_external(ct);
 439
 440                 case MESSAGE_RFC822:
 441                 default:
 442                         return store_generic(ct);
 443                         break;
 444                 }
 445                 break;
 446
 447         case CT_APPLICATION:
 448         case CT_TEXT:
 449         case CT_AUDIO:
 450         case CT_IMAGE:
 451         case CT_VIDEO:
 452                 return store_generic(ct);
 453                 break;
 454
 455         default:
 456                 adios(EX_DATAERR, NULL, "unknown content type %d", ct->c_type);
 457                 break;
 458         }
 459
 460         return OK;  /* NOT REACHED */
 461 }
 462
 463
 464 /*
 465 ** Generic routine to store a MIME content.
 466 ** (application, audio, video, image, text, message/rfc922)
 467 */
 468 static int
 469 store_generic(CT ct)
 470 {
 471         char **ap, **vp, *cp;
 472         CI ci = &ct->c_ctinfo;
 473
 474         /*
 475         ** Check if the content specifies a filename in its MIME parameters.
 476         ** Don't bother with this for type "message"
 477         ** (only the "message" subtype "rfc822" will use store_generic).
 478         */
 479         if (autosw && ct->c_type != CT_MESSAGE) {
 480                 /*
 481                 ** Check the attribute/value pairs, for the attribute "name".
 482                 ** If found, take the basename, do a few sanity checks and
 483                 ** copy the value into c_storeproc.
 484                 */
 485                 for (ap = ci->ci_attrs, vp = ci->ci_values; *ap; ap++,vp++) {
 486                         if (mh_strcasecmp(*ap, "name")!=0) {
 487                                 continue;
 488                         }
 489                         cp = mhbasename(*vp);
 490                         if (*cp && *cp!='.' && *cp!='|' && *cp!='!' &&
 491                                         !strchr(cp, '%')) {
 492                                 /* filename looks good: use it */
 493                                 ct->c_storeproc = mh_xstrdup(cp);
 494                         }
 495                         break;
 496                 }
 497         }
 498
 499         return store_content(ct, NULL);
 500 }
 501
 502
 503 /*
 504 ** Store the content of a multipart message
 505 */
 506
 507 static int
 508 store_multi(CT ct)
 509 {
 510         int result;
 511         struct multipart *m = (struct multipart *) ct->c_ctparams;
 512         struct part *part;
 513
 514         result = NOTOK;
 515         for (part = m->mp_parts; part; part = part->mp_next) {
 516                 CT  p = part->mp_part;
 517
 518                 if (part_ok(p, 1) && type_ok(p, 1)) {
 519                         result = store_switch(p);
 520                         if (result == OK && ct->c_subtype == MULTI_ALTERNATE)
 521                                 break;
 522                 }
 523         }
 524
 525         return result;
 526 }
 527
 528
 529 /*
 530 ** Reassemble and store the contents of a collection
 531 ** of messages of type "message/partial".
 532 */
 533
 534 static int
 535 store_partial(CT ct)
 536 {
 537         int cur, hi, i;
 538         CT p, *ctp, *ctq;
 539         CT *base;
 540         struct partial *pm, *qm;
 541
 542         qm = (struct partial *) ct->c_ctparams;
 543         if (qm->pm_stored)
 544                 return OK;
 545
 546         hi = i = 0;
 547         for (ctp = cts; *ctp; ctp++) {
 548                 p = *ctp;
 549                 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 550                         pm = (struct partial *) p->c_ctparams;
 551                         if (!pm->pm_stored &&
 552                                         strcmp(qm->pm_partid, pm->pm_partid)
 553                                         == 0) {
 554                                 pm->pm_marked = pm->pm_partno;
 555                                 if (pm->pm_maxno)
 556                                         hi = pm->pm_maxno;
 557                                 pm->pm_stored = 1;
 558                                 i++;
 559                         } else
 560                                 pm->pm_marked = 0;
 561                 }
 562         }
 563
 564         if (hi == 0) {
 565                 advise(NULL, "missing (at least) last part of multipart message");
 566                 return NOTOK;
 567         }
 568
 569         base = mh_xcalloc(i + 1, sizeof(*base));
 570
 571         ctq = base;
 572         for (ctp = cts; *ctp; ctp++) {
 573                 p = *ctp;
 574                 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 575                         pm = (struct partial *) p->c_ctparams;
 576                         if (pm->pm_marked)
 577                                 *ctq++ = p;
 578                 }
 579         }
 580         *ctq = NULL;
 581
 582         if (i > 1)
 583                 qsort((char *) base, i, sizeof(*base), (qsort_comp) ct_compar);
 584
 585         cur = 1;
 586         for (ctq = base; *ctq; ctq++) {
 587                 p = *ctq;
 588                 pm = (struct partial *) p->c_ctparams;
 589                 if (pm->pm_marked != cur) {
 590                         if (pm->pm_marked == cur - 1) {
 591                                 admonish(NULL, "duplicate part %d of %d part multipart message", pm->pm_marked, hi);
 592                                 continue;
 593                         }
 594
 595 missing_part:
 596                         advise (NULL, "missing %spart %d of %d part multipart message", cur != hi ? "(at least) " : "", cur, hi);
 597                         goto losing;
 598                 } else
 599                         cur++;
 600         }
 601         if (hi != --cur) {
 602                 cur = hi;
 603                 goto missing_part;
 604         }
 605
 606         /*
 607         ** Now cycle through the sorted list of messages of type
 608         ** "message/partial" and save/append them to a file.
 609         */
 610
 611         ctq = base;
 612         ct = *ctq++;
 613         if (store_content(ct, NULL) == NOTOK) {
 614 losing:
 615                 mh_free0(&base);
 616                 return NOTOK;
 617         }
 618
 619         for (; *ctq; ctq++) {
 620                 p = *ctq;
 621                 if (store_content(p, ct) == NOTOK)
 622                         goto losing;
 623         }
 624
 625         mh_free0(&base);
 626         return OK;
 627 }
 628
 629
 630 /*
 631 ** Show how to retrieve content of type "message/external".
 632 */
 633 static int
 634 store_external(CT ct)
 635 {
 636         char **ap, **ep;
 637         char *msg;
 638         FILE *fp;
 639         char buf[BUFSIZ];
 640
 641         msg = add("You need to fetch the contents yourself:", NULL);
 642         ap = ct->c_ctinfo.ci_attrs;
 643         ep = ct->c_ctinfo.ci_values;
 644         for (; *ap; ap++, ep++) {
 645                 msg = add(concat("\n\t", *ap, ": ", *ep, NULL), msg);
 646         }
 647         if (!(fp = fopen(ct->c_file, "r"))) {
 648                 adios(EX_IOERR, ct->c_file, "unable to open");
 649         }
 650         fseek(fp, ct->c_begin, SEEK_SET);
 651         while (!feof(fp) && ftell(fp) < ct->c_end) {
 652                 if (!fgets(buf, sizeof buf, fp)) {
 653                         adios(EX_IOERR, ct->c_file, "unable to read");
 654                 }
 655                 *strchr(buf, '\n') = '\0';
 656                 msg = add(concat("\n\t", buf, NULL), msg);
 657         }
 658         fclose(fp);
 659         advise(NULL, msg);
 660         return OK;
 661 }
 662
 663
 664 /*
 665 ** Compare the numbering from two different
 666 ** message/partials (needed for sorting).
 667 */
 668
 669 static int
 670 ct_compar(CT *a, CT *b)
 671 {
 672         struct partial *am = (struct partial *) ((*a)->c_ctparams);
 673         struct partial *bm = (struct partial *) ((*b)->c_ctparams);
 674
 675         return (am->pm_marked - bm->pm_marked);
 676 }
 677
 678
 679 /*
 680 ** Store contents of a message or message part to
 681 ** a folder, a file, the standard output, or pass
 682 ** the contents to a command.
 683 **
 684 ** If the current content to be saved is a followup part
 685 ** to a collection of messages of type "message/partial",
 686 ** then field "p" is a pointer to the Content structure
 687 ** to the first message/partial in the group.
 688 */
 689
 690 static int
 691 store_content(CT ct, CT p)
 692 {
 693         int appending = 0, msgnum = 0;
 694         int is_partial = 0, first_partial = 0;
 695         int last_partial = 0;
 696         char *cp, buffer[BUFSIZ];
 697
 698         /*
 699         ** Do special processing for messages of
 700         ** type "message/partial".
 701         **
 702         ** We first check if this content is of type
 703         ** "message/partial".  If it is, then we need to check
 704         ** whether it is the first and/or last in the group.
 705         **
 706         ** Then if "p" is a valid pointer, it points to the Content
 707         ** structure of the first partial in the group.  So we copy
 708         ** the file name and/or folder name from that message.  In
 709         ** this case, we also note that we will be appending.
 710         */
 711         if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 712                 struct partial *pm = (struct partial *) ct->c_ctparams;
 713
 714                 /* Yep, it's a message/partial */
 715                 is_partial = 1;
 716
 717                 /* But is it the first and/or last in the collection? */
 718                 if (pm->pm_partno == 1)
 719                         first_partial = 1;
 720                 if (pm->pm_maxno && pm->pm_partno == pm->pm_maxno)
 721                         last_partial = 1;
 722
 723                 /*
 724                 ** If "p" is a valid pointer, then it points to the
 725                 ** Content structure for the first message in the group.
 726                 ** So we just copy the filename or foldername information
 727                 ** from the previous iteration of this function.
 728                 */
 729                 if (p) {
 730                         appending = 1;
 731                         ct->c_storage = mh_xstrdup(p->c_storage);
 732
 733                         /* record the folder name */
 734                         if (p->c_folder) {
 735                                 ct->c_folder = mh_xstrdup(p->c_folder);
 736                         }
 737                         goto got_filename;
 738                 }
 739         }
 740
 741         /*
 742         ** Get storage formatting string.
 743         **
 744         ** 1) If we have storeproc defined, then use that
 745         ** 2) Else check for a mhstore-store-<type>/<subtype> entry
 746         ** 3) Else check for a mhstore-store-<type> entry
 747         ** 4) Else if content is "message", use "+" (current folder)
 748         ** 5) Else use string "%m%P.%s".
 749         */
 750         if (!(cp = ct->c_storeproc) || !*cp) {
 751                 CI ci = &ct->c_ctinfo;
 752
 753                 snprintf(buffer, sizeof(buffer), "%s-store-%s/%s",
 754                                 invo_name, ci->ci_type, ci->ci_subtype);
 755                 if ((cp = context_find(buffer)) == NULL || *cp == '\0') {
 756                         snprintf(buffer, sizeof(buffer), "%s-store-%s",
 757                                         invo_name, ci->ci_type);
 758                         if ((cp = context_find(buffer)) == NULL ||
 759                                         *cp == '\0') {
 760                                 cp = ct->c_type == CT_MESSAGE ?
 761                                                 "+" : "%m%P.%s";
 762                         }
 763                 }
 764         }
 765
 766         /*
 767         ** Check the beginning of storage formatting string
 768         ** to see if we are saving content to a folder.
 769         */
 770         if (*cp == '+' || *cp == '@') {
 771                 char *tmpfilenam, *folder;
 772
 773                 /* Store content in temporary file for now */
 774                 tmpfilenam = m_mktemp(invo_name, NULL, NULL);
 775                 ct->c_storage = mh_xstrdup(tmpfilenam);
 776
 777                 /* Get the folder name */
 778                 if (cp[1])
 779                         folder = mh_xstrdup(expandfol(cp));
 780                 else
 781                         folder = getcurfol();
 782
 783                 /* Check if folder exists */
 784                 create_folder(toabsdir(folder), 0, exit);
 785
 786                 /* Record the folder name */
 787                 ct->c_folder = mh_xstrdup(folder);
 788
 789                 if (cp[1])
 790                         mh_free0(&folder);
 791
 792                 goto got_filename;
 793         }
 794
 795         /*
 796         ** Parse and expand the storage formatting string
 797         ** in `cp' into `buffer'.
 798         */
 799         parse_format_string(ct, cp, buffer, sizeof(buffer), dir);
 800
 801         /*
 802         ** If formatting begins with '|' or '!', then pass
 803         ** content to standard input of a command and return.
 804         */
 805         if (buffer[0] == '|' || buffer[0] == '!')
 806                 return show_content_aux(ct, 0, buffer + 1, dir);
 807
 808         /* record the filename */
 809         ct->c_storage = mh_xstrdup(buffer);
 810
 811 got_filename:
 812         /* flush the output stream */
 813         fflush(stdout);
 814
 815         /* Now save or append the content to a file */
 816         if (output_content_file(ct, appending) == NOTOK)
 817                 return NOTOK;
 818
 819         /*
 820         ** If necessary, link the file into a folder and remove
 821         ** the temporary file.  If this message is a partial,
 822         ** then only do this if it is the last one in the group.
 823         */
 824         if (ct->c_folder && (!is_partial || last_partial)) {
 825                 msgnum = output_content_folder(ct->c_folder, ct->c_storage);
 826                 unlink(ct->c_storage);
 827                 if (msgnum == NOTOK)
 828                         return NOTOK;
 829         }
 830
 831         /*
 832         ** Now print out the name/number of the message
 833         ** that we are storing.
 834         */
 835         if (is_partial) {
 836                 if (first_partial)
 837                         fprintf(stderr, "reassembling partials ");
 838                 if (last_partial)
 839                         fprintf(stderr, "%s", ct->c_file);
 840                 else
 841                         fprintf(stderr, "%s,", ct->c_file);
 842         } else {
 843                 fprintf(stderr, "storing message %s", ct->c_file);
 844                 if (ct->c_partno)
 845                         fprintf(stderr, " part %s", ct->c_partno);
 846         }
 847
 848         /*
 849         ** Unless we are in the "middle" of group of message/partials,
 850         ** we now print the name of the file, folder, and/or message
 851         ** to which we are storing the content.
 852         */
 853         if (!is_partial || last_partial) {
 854                 if (ct->c_folder) {
 855                         fprintf(stderr, " to folder %s as message %d\n",
 856                                         ct->c_folder, msgnum);
 857                 } else if (strcmp(ct->c_storage, "-")==0) {
 858                         fprintf(stderr, " to stdout\n");
 859                 } else {
 860                         int cwdlen;
 861
 862                         cwdlen = strlen(cwd);
 863                         fprintf(stderr, " as file %s\n",
 864                                         strncmp(ct->c_storage, cwd,
 865                                         cwdlen)!=0 ||
 866                                         ct->c_storage[cwdlen] != '/' ?
 867                                         ct->c_storage :
 868                                         ct->c_storage + cwdlen + 1);
 869                 }
 870         }
 871
 872         return OK;
 873 }
 874
 875
 876 /*
 877 ** Output content to a file
 878 */
 879
 880 static int
 881 output_content_file(CT ct, int appending)
 882 {
 883         int filterstate;
 884         char *file, buffer[BUFSIZ];
 885         long pos, last;
 886         FILE *fp;
 887
 888         /*
 889         ** If the pathname contains directories, make sure
 890         ** all of them exist.
 891         */
 892         if (strchr(ct->c_storage, '/') && make_intermediates(ct->c_storage)
 893                         == NOTOK)
 894                 return NOTOK;
 895
 896         if (ct->c_encoding != CE_7BIT) {
 897                 int cc, fd;
 898
 899                 if (!ct->c_ceopenfnx) {
 900                         advise(NULL, "don't know how to decode part %s of message %s", ct->c_partno, ct->c_file);
 901                         return NOTOK;
 902                 }
 903
 904                 file = appending || strcmp(ct->c_storage, "-")==0 ?
 905                                 NULL : ct->c_storage;
 906                 if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
 907                         return NOTOK;
 908                 if (strcmp(file, ct->c_storage)==0) {
 909                         (*ct->c_ceclosefnx) (ct);
 910                         return OK;
 911                 }
 912
 913                 /*
 914                 ** Send to standard output
 915                 */
 916                 if (strcmp(ct->c_storage, "-")==0) {
 917                         int gd;
 918
 919                         if ((gd = dup(fileno(stdout))) == NOTOK) {
 920                                 advise("stdout", "unable to dup");
 921 losing:
 922                                 (*ct->c_ceclosefnx) (ct);
 923                                 return NOTOK;
 924                         }
 925                         if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
 926                                 advise("stdout", "unable to fdopen (%d, \"%s\") from", gd, appending ? "a" : "w");
 927                                 close(gd);
 928                                 goto losing;
 929                         }
 930                 } else {
 931                         /*
 932                         ** Open output file
 933                         */
 934                         if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
 935                                         == NULL) {
 936                                 advise(ct->c_storage, "unable to fopen for %s",
 937                                                 appending ?
 938                                                 "appending" : "writing");
 939                                 goto losing;
 940                         }
 941                 }
 942
 943                 /*
 944                 ** Filter the header fields of the initial enclosing
 945                 ** message/partial into the file.
 946                 */
 947                 if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 948                         struct partial *pm = (struct partial *) ct->c_ctparams;
 949
 950                         if (pm->pm_partno == 1)
 951                                 copy_some_headers(fp, ct);
 952                 }
 953
 954                 for (;;) {
 955                         switch (cc = read(fd, buffer, sizeof(buffer))) {
 956                         case NOTOK:
 957                                 advise(file, "error reading content from");
 958                                 break;
 959
 960                         case OK:
 961                                 break;
 962
 963                         default:
 964                                 fwrite(buffer, sizeof(*buffer), cc, fp);
 965                                 continue;
 966                         }
 967                         break;
 968                 }
 969
 970                 (*ct->c_ceclosefnx) (ct);
 971
 972                 if (cc != NOTOK && fflush(fp))
 973                         advise(ct->c_storage, "error writing to");
 974
 975                 fclose(fp);
 976
 977                 return (cc != NOTOK ? OK : NOTOK);
 978         }
 979
 980         if (!ct->c_fp && (ct->c_fp = fopen(ct->c_file, "r")) == NULL) {
 981                 advise(ct->c_file, "unable to open for reading");
 982                 return NOTOK;
 983         }
 984
 985         pos = ct->c_begin;
 986         last = ct->c_end;
 987         fseek(ct->c_fp, pos, SEEK_SET);
 988
 989         if (strcmp(ct->c_storage, "-")==0) {
 990                 int gd;
 991
 992                 if ((gd = dup(fileno(stdout))) == NOTOK) {
 993                         advise("stdout", "unable to dup");
 994                         return NOTOK;
 995                 }
 996                 if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
 997                         advise("stdout", "unable to fdopen (%d, \"%s\") from",
 998                                         gd, appending ? "a" : "w");
 999                         close(gd);
1000                         return NOTOK;
1001                 }
1002         } else {
1003                 if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
1004                                 == NULL) {
1005                         advise(ct->c_storage, "unable to fopen for %s",
1006                                         appending ? "appending" : "writing");
1007                         return NOTOK;
1008                 }
1009         }
1010
1011         /*
1012         ** Copy a few of the header fields of the initial
1013         ** enclosing message/partial into the file.
1014         */
1015         filterstate = 0;
1016         if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
1017                 struct partial *pm = (struct partial *) ct->c_ctparams;
1018
1019                 if (pm->pm_partno == 1) {
1020                         copy_some_headers(fp, ct);
1021                         filterstate = 1;
1022                 }
1023         }
1024
1025         while (fgets(buffer, sizeof(buffer) - 1, ct->c_fp)) {
1026                 if ((pos += strlen(buffer)) > last) {
1027                         int diff;
1028
1029                         diff = strlen(buffer) - (pos - last);
1030                         if (diff >= 0)
1031                                 buffer[diff] = '\0';
1032                 }
1033                 /*
1034                 ** If this is the first content of a group of
1035                 ** message/partial contents, then we only copy a few
1036                 ** of the header fields of the enclosed message.
1037                 */
1038                 if (filterstate) {
1039                         switch (buffer[0]) {
1040                         case ' ':
1041                         case '\t':
1042                                 if (filterstate < 0)
1043                                         buffer[0] = 0;
1044                                 break;
1045
1046                         case '\n':
1047                                 filterstate = 0;
1048                                 break;
1049
1050                         default:
1051                                 if (!uprf(buffer, XXX_FIELD_PRF) && !uprf(buffer, VRSN_FIELD) && !uprf(buffer, "Subject:") && !uprf(buffer, "Message-ID:")) {
1052                                         filterstate = -1;
1053                                         buffer[0] = 0;
1054                                         break;
1055                                 }
1056                                 filterstate = 1;
1057                                 break;
1058                         }
1059                 }
1060                 fputs(buffer, fp);
1061                 if (pos >= last)
1062                         break;
1063         }
1064
1065         if (fflush(fp))
1066                 advise(ct->c_storage, "error writing to");
1067
1068         fclose(fp);
1069         fclose(ct->c_fp);
1070         ct->c_fp = NULL;
1071         return OK;
1072 }
1073
1074
1075 /*
1076 ** Add a file to a folder.
1077 **
1078 ** Return the new message number of the file
1079 ** when added to the folder.  Return -1, if
1080 ** there is an error.
1081 */
1082
1083 static int
1084 output_content_folder(char *folder, char *filename)
1085 {
1086         int msgnum;
1087         struct msgs *mp;
1088
1089         /* Read the folder. */
1090         if ((mp = folder_read(folder))) {
1091                 /* Link file into folder */
1092                 msgnum = folder_addmsg(&mp, filename, 0, 0, 0, 0, NULL);
1093         } else {
1094                 advise(NULL, "unable to read folder %s", folder);
1095                 return NOTOK;
1096         }
1097
1098         /* free folder structure */
1099         folder_free(mp);
1100
1101         /*
1102         ** Return msgnum.  We are relying on the fact that
1103         ** msgnum will be -1, if folder_addmsg() had an error.
1104         */
1105         return msgnum;
1106 }
1107
1108
1109 /*
1110 ** Parse and expand the storage formatting string
1111 ** pointed to by "cp" into "buffer".
1112 */
1113
1114 static int
1115 parse_format_string(CT ct, char *cp, char *buffer, int buflen, char *dir)
1116 {
1117         int len;
1118         char *bp;
1119         CI ci = &ct->c_ctinfo;
1120
1121         /*
1122         ** If storage string is "-", just copy it, and
1123         ** return (send content to standard output).
1124         */
1125         if (cp[0] == '-' && cp[1] == '\0') {
1126                 strncpy(buffer, cp, buflen);
1127                 return 0;
1128         }
1129
1130         bp = buffer;
1131         bp[0] = '\0';
1132
1133         /*
1134         ** If formatting string is a pathname that doesn't
1135         ** begin with '/', then preface the path with the
1136         ** appropriate directory.
1137         */
1138         if (*cp != '/' && *cp != '|' && *cp != '!') {
1139                 snprintf(bp, buflen, "%s/", dir[1] ? dir : "");
1140                 len = strlen(bp);
1141                 bp += len;
1142                 buflen -= len;
1143         }
1144
1145         for (; *cp; cp++) {
1146
1147                 /* We are processing a storage escape */
1148                 if (*cp == '%') {
1149                         switch (*++cp) {
1150                         case 'a':
1151                                 /*
1152                                 ** Insert parameters from Content-Type.
1153                                 ** This is only valid for '|' commands.
1154                                 */
1155                                 if (buffer[0] != '|' && buffer[0] != '!') {
1156                                         *bp++ = *--cp;
1157                                         *bp = '\0';
1158                                         buflen--;
1159                                         continue;
1160                                 } else {
1161                                         char **ap, **ep;
1162                                         char *s = "";
1163
1164                                         for (ap=ci->ci_attrs, ep=ci->ci_values;
1165                                                          *ap; ap++, ep++) {
1166                                                 snprintf(bp, buflen,
1167                                                                 "%s%s=\"%s\"",
1168                                                                 s, *ap, *ep);
1169                                                 len = strlen(bp);
1170                                                 bp += len;
1171                                                 buflen -= len;
1172                                                 s = " ";
1173                                         }
1174                                 }
1175                                 break;
1176
1177                         case 'm':
1178                                 /* insert message number */
1179                                 snprintf(bp, buflen, "%s",
1180                                                 mhbasename(ct->c_file));
1181                                 break;
1182
1183                         case 'P':
1184                                 /* insert part number with leading dot */
1185                                 if (ct->c_partno)
1186                                         snprintf(bp, buflen, ".%s",
1187                                                         ct->c_partno);
1188                                 break;
1189
1190                         case 'p':
1191                                 /* insert part number withouth leading dot */
1192                                 if (ct->c_partno)
1193                                         strncpy(bp, ct->c_partno, buflen);
1194                                 break;
1195
1196                         case 't':
1197                                 /* insert content type */
1198                                 strncpy(bp, ci->ci_type, buflen);
1199                                 break;
1200
1201                         case 's':
1202                                 /* insert content subtype */
1203                                 strncpy(bp, ci->ci_subtype, buflen);
1204                                 break;
1205
1206                         case '%':
1207                                 /* insert the character % */
1208                                 goto raw;
1209
1210                         default:
1211                                 *bp++ = *--cp;
1212                                 *bp = '\0';
1213                                 buflen--;
1214                                 continue;
1215                         }
1216
1217                         /* Advance bp and decrement buflen */
1218                         len = strlen(bp);
1219                         bp += len;
1220                         buflen -= len;
1221
1222                 } else {
1223 raw:
1224                         *bp++ = *cp;
1225                         *bp = '\0';
1226                         buflen--;
1227                 }
1228         }
1229
1230         return 0;
1231 }
1232
1233
1234 /*
1235 ** Copy some of the header fields of the initial message/partial
1236 ** message into the header of the reassembled message.
1237 */
1238
1239 static int
1240 copy_some_headers(FILE *out, CT ct)
1241 {
1242         HF hp;
1243
1244         hp = ct->c_first_hf;  /* start at first header field */
1245
1246         while (hp) {
1247                 /*
1248                 ** A few of the header fields of the enclosing
1249                 ** messages are not copied.
1250                 */
1251                 if (!uprf(hp->name, XXX_FIELD_PRF) &&
1252                                 mh_strcasecmp(hp->name, VRSN_FIELD) &&
1253                                 mh_strcasecmp(hp->name, "Subject") &&
1254                                 mh_strcasecmp(hp->name, "Message-ID"))
1255                         fprintf(out, "%s:%s", hp->name, hp->value);
1256                 hp = hp->next;  /* next header field */
1257         }
1258
1259         return OK;
1260 }