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 : getcpy(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 = getcpy(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 = getcpy(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 = getcpy(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 = (CT *) mh_xcalloc((size_t) 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 = (CT *) mh_xcalloc((size_t) (mp->numsel + 1),
 297                                 sizeof(*cts));
 298                 ctp = cts;
 299
 300                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 301                         if (is_selected(mp, msgnum)) {
 302                                 char *msgnam;
 303
 304                                 msgnam = m_name(msgnum);
 305                                 if ((ct = parse_mime(msgnam)))
 306                                         *ctp++ = ct;
 307                         }
 308                 }
 309         }
 310
 311         if (!*cts)
 312                 exit(EX_SOFTWARE);
 313
 314         userrs = 1;
 315         SIGNAL(SIGQUIT, quitser);
 316         SIGNAL(SIGPIPE, pipeser);
 317
 318         /*
 319         ** Get the associated umask for the relevant contents.
 320         */
 321         for (ctp = cts; *ctp; ctp++) {
 322                 struct stat st;
 323
 324                 ct = *ctp;
 325                 if (type_ok(ct, 1) && !ct->c_umask) {
 326                         if (stat(ct->c_file, &st) != NOTOK)
 327                                 ct->c_umask = ~(st.st_mode & 0777);
 328                         else
 329                                 ct->c_umask = ~m_gmprot();
 330                 }
 331         }
 332
 333         /*
 334         ** Store the message content
 335         */
 336         store_all_messages(cts);
 337
 338         /* Now free all the structures for the content */
 339         for (ctp = cts; *ctp; ctp++)
 340                 free_content(*ctp);
 341
 342         free((char *) cts);
 343         cts = NULL;
 344
 345         /* If reading from a folder, do some updating */
 346         if (mp) {
 347                 context_replace(curfolder, folder); /* update current folder */
 348                 seq_setcur(mp, mp->hghsel);  /* update current message */
 349                 seq_save(mp);  /* synchronize sequences  */
 350                 context_save();  /* save the context file  */
 351         }
 352
 353         return 0;
 354 }
 355
 356
 357 static void
 358 pipeser(int i)
 359 {
 360         if (i == SIGQUIT) {
 361                 unlink("core");
 362                 fflush(stdout);
 363                 fprintf(stderr, "\n");
 364                 fflush(stderr);
 365                 exit(EX_TEMPFAIL);
 366         }
 367
 368         exit(EX_IOERR);
 369         /* NOTREACHED */
 370 }
 371
 372
 373 /*
 374 ** Main entry point to store content from a collection of messages.
 375 */
 376 static void
 377 store_all_messages(CT *cts)
 378 {
 379         CT ct, *ctp;
 380         char *cp;
 381
 382         /*
 383         ** Check for the directory in which to
 384         ** store any contents.
 385         */
 386         if ((cp = context_find(nmhstorage)) && *cp)
 387                 dir = getcpy(cp);
 388         else
 389                 dir = getcpy(cwd);
 390
 391         for (ctp = cts; *ctp; ctp++) {
 392                 ct = *ctp;
 393                 store_single_message(ct);
 394         }
 395
 396         flush_errors();
 397 }
 398
 399
 400 /*
 401 ** Entry point to store the content
 402 ** in a (single) message
 403 */
 404
 405 static void
 406 store_single_message(CT ct)
 407 {
 408         if (type_ok(ct, 1)) {
 409                 umask(ct->c_umask);
 410                 store_switch(ct);
 411                 if (ct->c_fp) {
 412                         fclose(ct->c_fp);
 413                         ct->c_fp = NULL;
 414                 }
 415                 if (ct->c_ceclosefnx)
 416                         (*ct->c_ceclosefnx) (ct);
 417         }
 418 }
 419
 420
 421 /*
 422 ** Switching routine to store different content types
 423 */
 424
 425 static int
 426 store_switch(CT ct)
 427 {
 428         switch (ct->c_type) {
 429         case CT_MULTIPART:
 430                 return store_multi(ct);
 431                 break;
 432
 433         case CT_MESSAGE:
 434                 switch (ct->c_subtype) {
 435                 case MESSAGE_PARTIAL:
 436                         return store_partial(ct);
 437                         break;
 438
 439                 case MESSAGE_EXTERNAL:
 440                         return store_external(ct);
 441
 442                 case MESSAGE_RFC822:
 443                 default:
 444                         return store_generic(ct);
 445                         break;
 446                 }
 447                 break;
 448
 449         case CT_APPLICATION:
 450         case CT_TEXT:
 451         case CT_AUDIO:
 452         case CT_IMAGE:
 453         case CT_VIDEO:
 454                 return store_generic(ct);
 455                 break;
 456
 457         default:
 458                 adios(EX_DATAERR, NULL, "unknown content type %d", ct->c_type);
 459                 break;
 460         }
 461
 462         return OK;  /* NOT REACHED */
 463 }
 464
 465
 466 /*
 467 ** Generic routine to store a MIME content.
 468 ** (application, audio, video, image, text, message/rfc922)
 469 */
 470 static int
 471 store_generic(CT ct)
 472 {
 473         char **ap, **vp, *cp;
 474         CI ci = &ct->c_ctinfo;
 475
 476         /*
 477         ** Check if the content specifies a filename in its MIME parameters.
 478         ** Don't bother with this for type "message"
 479         ** (only the "message" subtype "rfc822" will use store_generic).
 480         */
 481         if (autosw && ct->c_type != CT_MESSAGE) {
 482                 /*
 483                 ** Check the attribute/value pairs, for the attribute "name".
 484                 ** If found, take the basename, do a few sanity checks and
 485                 ** copy the value into c_storeproc.
 486                 */
 487                 for (ap = ci->ci_attrs, vp = ci->ci_values; *ap; ap++,vp++) {
 488                         if (mh_strcasecmp(*ap, "name")!=0) {
 489                                 continue;
 490                         }
 491                         cp = mhbasename(*vp);
 492                         if (*cp && *cp!='.' && *cp!='|' && *cp!='!' &&
 493                                         !strchr(cp, '%')) {
 494                                 /* filename looks good: use it */
 495                                 ct->c_storeproc = getcpy(cp);
 496                         }
 497                         break;
 498                 }
 499         }
 500
 501         return store_content(ct, NULL);
 502 }
 503
 504
 505 /*
 506 ** Store the content of a multipart message
 507 */
 508
 509 static int
 510 store_multi(CT ct)
 511 {
 512         int result;
 513         struct multipart *m = (struct multipart *) ct->c_ctparams;
 514         struct part *part;
 515
 516         result = NOTOK;
 517         for (part = m->mp_parts; part; part = part->mp_next) {
 518                 CT  p = part->mp_part;
 519
 520                 if (part_ok(p, 1) && type_ok(p, 1)) {
 521                         result = store_switch(p);
 522                         if (result == OK && ct->c_subtype == MULTI_ALTERNATE)
 523                                 break;
 524                 }
 525         }
 526
 527         return result;
 528 }
 529
 530
 531 /*
 532 ** Reassemble and store the contents of a collection
 533 ** of messages of type "message/partial".
 534 */
 535
 536 static int
 537 store_partial(CT ct)
 538 {
 539         int cur, hi, i;
 540         CT p, *ctp, *ctq;
 541         CT *base;
 542         struct partial *pm, *qm;
 543
 544         qm = (struct partial *) ct->c_ctparams;
 545         if (qm->pm_stored)
 546                 return OK;
 547
 548         hi = i = 0;
 549         for (ctp = cts; *ctp; ctp++) {
 550                 p = *ctp;
 551                 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 552                         pm = (struct partial *) p->c_ctparams;
 553                         if (!pm->pm_stored &&
 554                                         strcmp(qm->pm_partid, pm->pm_partid)
 555                                         == 0) {
 556                                 pm->pm_marked = pm->pm_partno;
 557                                 if (pm->pm_maxno)
 558                                         hi = pm->pm_maxno;
 559                                 pm->pm_stored = 1;
 560                                 i++;
 561                         } else
 562                                 pm->pm_marked = 0;
 563                 }
 564         }
 565
 566         if (hi == 0) {
 567                 advise(NULL, "missing (at least) last part of multipart message");
 568                 return NOTOK;
 569         }
 570
 571         base = (CT *) mh_xcalloc((size_t) (i + 1), sizeof(*base));
 572
 573         ctq = base;
 574         for (ctp = cts; *ctp; ctp++) {
 575                 p = *ctp;
 576                 if (p->c_type == CT_MESSAGE && p->c_subtype == ct->c_subtype) {
 577                         pm = (struct partial *) p->c_ctparams;
 578                         if (pm->pm_marked)
 579                                 *ctq++ = p;
 580                 }
 581         }
 582         *ctq = NULL;
 583
 584         if (i > 1)
 585                 qsort((char *) base, i, sizeof(*base), (qsort_comp) ct_compar);
 586
 587         cur = 1;
 588         for (ctq = base; *ctq; ctq++) {
 589                 p = *ctq;
 590                 pm = (struct partial *) p->c_ctparams;
 591                 if (pm->pm_marked != cur) {
 592                         if (pm->pm_marked == cur - 1) {
 593                                 admonish(NULL, "duplicate part %d of %d part multipart message", pm->pm_marked, hi);
 594                                 continue;
 595                         }
 596
 597 missing_part:
 598                         advise (NULL, "missing %spart %d of %d part multipart message", cur != hi ? "(at least) " : "", cur, hi);
 599                         goto losing;
 600                 } else
 601                         cur++;
 602         }
 603         if (hi != --cur) {
 604                 cur = hi;
 605                 goto missing_part;
 606         }
 607
 608         /*
 609         ** Now cycle through the sorted list of messages of type
 610         ** "message/partial" and save/append them to a file.
 611         */
 612
 613         ctq = base;
 614         ct = *ctq++;
 615         if (store_content(ct, NULL) == NOTOK) {
 616 losing:
 617                 free((char *) base);
 618                 return NOTOK;
 619         }
 620
 621         for (; *ctq; ctq++) {
 622                 p = *ctq;
 623                 if (store_content(p, ct) == NOTOK)
 624                         goto losing;
 625         }
 626
 627         free((char *) base);
 628         return OK;
 629 }
 630
 631
 632 /*
 633 ** Show how to retrieve content of type "message/external".
 634 */
 635 static int
 636 store_external(CT ct)
 637 {
 638         char **ap, **ep;
 639         char *msg;
 640         FILE *fp;
 641         char buf[BUFSIZ];
 642
 643         msg = add("You need to fetch the contents yourself:", NULL);
 644         ap = ct->c_ctinfo.ci_attrs;
 645         ep = ct->c_ctinfo.ci_values;
 646         for (; *ap; ap++, ep++) {
 647                 msg = add(concat("\n\t", *ap, ": ", *ep, NULL), msg);
 648         }
 649         if (!(fp = fopen(ct->c_file, "r"))) {
 650                 adios(EX_IOERR, ct->c_file, "unable to open");
 651         }
 652         fseek(fp, ct->c_begin, SEEK_SET);
 653         while (!feof(fp) && ftell(fp) < ct->c_end) {
 654                 if (!fgets(buf, sizeof buf, fp)) {
 655                         adios(EX_IOERR, ct->c_file, "unable to read");
 656                 }
 657                 *strchr(buf, '\n') = '\0';
 658                 msg = add(concat("\n\t", buf, NULL), msg);
 659         }
 660         fclose(fp);
 661         advise(NULL, msg);
 662         return OK;
 663 }
 664
 665
 666 /*
 667 ** Compare the numbering from two different
 668 ** message/partials (needed for sorting).
 669 */
 670
 671 static int
 672 ct_compar(CT *a, CT *b)
 673 {
 674         struct partial *am = (struct partial *) ((*a)->c_ctparams);
 675         struct partial *bm = (struct partial *) ((*b)->c_ctparams);
 676
 677         return (am->pm_marked - bm->pm_marked);
 678 }
 679
 680
 681 /*
 682 ** Store contents of a message or message part to
 683 ** a folder, a file, the standard output, or pass
 684 ** the contents to a command.
 685 **
 686 ** If the current content to be saved is a followup part
 687 ** to a collection of messages of type "message/partial",
 688 ** then field "p" is a pointer to the Content structure
 689 ** to the first message/partial in the group.
 690 */
 691
 692 static int
 693 store_content(CT ct, CT p)
 694 {
 695         int appending = 0, msgnum = 0;
 696         int is_partial = 0, first_partial = 0;
 697         int last_partial = 0;
 698         char *cp, buffer[BUFSIZ];
 699
 700         /*
 701         ** Do special processing for messages of
 702         ** type "message/partial".
 703         **
 704         ** We first check if this content is of type
 705         ** "message/partial".  If it is, then we need to check
 706         ** whether it is the first and/or last in the group.
 707         **
 708         ** Then if "p" is a valid pointer, it points to the Content
 709         ** structure of the first partial in the group.  So we copy
 710         ** the file name and/or folder name from that message.  In
 711         ** this case, we also note that we will be appending.
 712         */
 713         if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 714                 struct partial *pm = (struct partial *) ct->c_ctparams;
 715
 716                 /* Yep, it's a message/partial */
 717                 is_partial = 1;
 718
 719                 /* But is it the first and/or last in the collection? */
 720                 if (pm->pm_partno == 1)
 721                         first_partial = 1;
 722                 if (pm->pm_maxno && pm->pm_partno == pm->pm_maxno)
 723                         last_partial = 1;
 724
 725                 /*
 726                 ** If "p" is a valid pointer, then it points to the
 727                 ** Content structure for the first message in the group.
 728                 ** So we just copy the filename or foldername information
 729                 ** from the previous iteration of this function.
 730                 */
 731                 if (p) {
 732                         appending = 1;
 733                         ct->c_storage = getcpy(p->c_storage);
 734
 735                         /* record the folder name */
 736                         if (p->c_folder) {
 737                                 ct->c_folder = getcpy(p->c_folder);
 738                         }
 739                         goto got_filename;
 740                 }
 741         }
 742
 743         /*
 744         ** Get storage formatting string.
 745         **
 746         ** 1) If we have storeproc defined, then use that
 747         ** 2) Else check for a mhstore-store-<type>/<subtype> entry
 748         ** 3) Else check for a mhstore-store-<type> entry
 749         ** 4) Else if content is "message", use "+" (current folder)
 750         ** 5) Else use string "%m%P.%s".
 751         */
 752         if (!(cp = ct->c_storeproc) || !*cp) {
 753                 CI ci = &ct->c_ctinfo;
 754
 755                 snprintf(buffer, sizeof(buffer), "%s-store-%s/%s",
 756                                 invo_name, ci->ci_type, ci->ci_subtype);
 757                 if ((cp = context_find(buffer)) == NULL || *cp == '\0') {
 758                         snprintf(buffer, sizeof(buffer), "%s-store-%s",
 759                                         invo_name, ci->ci_type);
 760                         if ((cp = context_find(buffer)) == NULL ||
 761                                         *cp == '\0') {
 762                                 cp = ct->c_type == CT_MESSAGE ?
 763                                                 "+" : "%m%P.%s";
 764                         }
 765                 }
 766         }
 767
 768         /*
 769         ** Check the beginning of storage formatting string
 770         ** to see if we are saving content to a folder.
 771         */
 772         if (*cp == '+' || *cp == '@') {
 773                 char *tmpfilenam, *folder;
 774
 775                 /* Store content in temporary file for now */
 776                 tmpfilenam = m_mktemp(invo_name, NULL, NULL);
 777                 ct->c_storage = getcpy(tmpfilenam);
 778
 779                 /* Get the folder name */
 780                 if (cp[1])
 781                         folder = getcpy(expandfol(cp));
 782                 else
 783                         folder = getcurfol();
 784
 785                 /* Check if folder exists */
 786                 create_folder(toabsdir(folder), 0, exit);
 787
 788                 /* Record the folder name */
 789                 ct->c_folder = getcpy(folder);
 790
 791                 if (cp[1])
 792                         free(folder);
 793
 794                 goto got_filename;
 795         }
 796
 797         /*
 798         ** Parse and expand the storage formatting string
 799         ** in `cp' into `buffer'.
 800         */
 801         parse_format_string(ct, cp, buffer, sizeof(buffer), dir);
 802
 803         /*
 804         ** If formatting begins with '|' or '!', then pass
 805         ** content to standard input of a command and return.
 806         */
 807         if (buffer[0] == '|' || buffer[0] == '!')
 808                 return show_content_aux(ct, 0, buffer + 1, dir);
 809
 810         /* record the filename */
 811         ct->c_storage = getcpy(buffer);
 812
 813 got_filename:
 814         /* flush the output stream */
 815         fflush(stdout);
 816
 817         /* Now save or append the content to a file */
 818         if (output_content_file(ct, appending) == NOTOK)
 819                 return NOTOK;
 820
 821         /*
 822         ** If necessary, link the file into a folder and remove
 823         ** the temporary file.  If this message is a partial,
 824         ** then only do this if it is the last one in the group.
 825         */
 826         if (ct->c_folder && (!is_partial || last_partial)) {
 827                 msgnum = output_content_folder(ct->c_folder, ct->c_storage);
 828                 unlink(ct->c_storage);
 829                 if (msgnum == NOTOK)
 830                         return NOTOK;
 831         }
 832
 833         /*
 834         ** Now print out the name/number of the message
 835         ** that we are storing.
 836         */
 837         if (is_partial) {
 838                 if (first_partial)
 839                         fprintf(stderr, "reassembling partials ");
 840                 if (last_partial)
 841                         fprintf(stderr, "%s", ct->c_file);
 842                 else
 843                         fprintf(stderr, "%s,", ct->c_file);
 844         } else {
 845                 fprintf(stderr, "storing message %s", ct->c_file);
 846                 if (ct->c_partno)
 847                         fprintf(stderr, " part %s", ct->c_partno);
 848         }
 849
 850         /*
 851         ** Unless we are in the "middle" of group of message/partials,
 852         ** we now print the name of the file, folder, and/or message
 853         ** to which we are storing the content.
 854         */
 855         if (!is_partial || last_partial) {
 856                 if (ct->c_folder) {
 857                         fprintf(stderr, " to folder %s as message %d\n",
 858                                         ct->c_folder, msgnum);
 859                 } else if (strcmp(ct->c_storage, "-")==0) {
 860                         fprintf(stderr, " to stdout\n");
 861                 } else {
 862                         int cwdlen;
 863
 864                         cwdlen = strlen(cwd);
 865                         fprintf(stderr, " as file %s\n",
 866                                         strncmp(ct->c_storage, cwd,
 867                                         cwdlen)!=0 ||
 868                                         ct->c_storage[cwdlen] != '/' ?
 869                                         ct->c_storage :
 870                                         ct->c_storage + cwdlen + 1);
 871                 }
 872         }
 873
 874         return OK;
 875 }
 876
 877
 878 /*
 879 ** Output content to a file
 880 */
 881
 882 static int
 883 output_content_file(CT ct, int appending)
 884 {
 885         int filterstate;
 886         char *file, buffer[BUFSIZ];
 887         long pos, last;
 888         FILE *fp;
 889
 890         /*
 891         ** If the pathname contains directories, make sure
 892         ** all of them exist.
 893         */
 894         if (strchr(ct->c_storage, '/') && make_intermediates(ct->c_storage)
 895                         == NOTOK)
 896                 return NOTOK;
 897
 898         if (ct->c_encoding != CE_7BIT) {
 899                 int cc, fd;
 900
 901                 if (!ct->c_ceopenfnx) {
 902                         advise(NULL, "don't know how to decode part %s of message %s", ct->c_partno, ct->c_file);
 903                         return NOTOK;
 904                 }
 905
 906                 file = appending || strcmp(ct->c_storage, "-")==0 ?
 907                                 NULL : ct->c_storage;
 908                 if ((fd = (*ct->c_ceopenfnx) (ct, &file)) == NOTOK)
 909                         return NOTOK;
 910                 if (strcmp(file, ct->c_storage)==0) {
 911                         (*ct->c_ceclosefnx) (ct);
 912                         return OK;
 913                 }
 914
 915                 /*
 916                 ** Send to standard output
 917                 */
 918                 if (strcmp(ct->c_storage, "-")==0) {
 919                         int gd;
 920
 921                         if ((gd = dup(fileno(stdout))) == NOTOK) {
 922                                 advise("stdout", "unable to dup");
 923 losing:
 924                                 (*ct->c_ceclosefnx) (ct);
 925                                 return NOTOK;
 926                         }
 927                         if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
 928                                 advise("stdout", "unable to fdopen (%d, \"%s\") from", gd, appending ? "a" : "w");
 929                                 close(gd);
 930                                 goto losing;
 931                         }
 932                 } else {
 933                         /*
 934                         ** Open output file
 935                         */
 936                         if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
 937                                         == NULL) {
 938                                 advise(ct->c_storage, "unable to fopen for %s",
 939                                                 appending ?
 940                                                 "appending" : "writing");
 941                                 goto losing;
 942                         }
 943                 }
 944
 945                 /*
 946                 ** Filter the header fields of the initial enclosing
 947                 ** message/partial into the file.
 948                 */
 949                 if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
 950                         struct partial *pm = (struct partial *) ct->c_ctparams;
 951
 952                         if (pm->pm_partno == 1)
 953                                 copy_some_headers(fp, ct);
 954                 }
 955
 956                 for (;;) {
 957                         switch (cc = read(fd, buffer, sizeof(buffer))) {
 958                         case NOTOK:
 959                                 advise(file, "error reading content from");
 960                                 break;
 961
 962                         case OK:
 963                                 break;
 964
 965                         default:
 966                                 fwrite(buffer, sizeof(*buffer), cc, fp);
 967                                 continue;
 968                         }
 969                         break;
 970                 }
 971
 972                 (*ct->c_ceclosefnx) (ct);
 973
 974                 if (cc != NOTOK && fflush(fp))
 975                         advise(ct->c_storage, "error writing to");
 976
 977                 fclose(fp);
 978
 979                 return (cc != NOTOK ? OK : NOTOK);
 980         }
 981
 982         if (!ct->c_fp && (ct->c_fp = fopen(ct->c_file, "r")) == NULL) {
 983                 advise(ct->c_file, "unable to open for reading");
 984                 return NOTOK;
 985         }
 986
 987         pos = ct->c_begin;
 988         last = ct->c_end;
 989         fseek(ct->c_fp, pos, SEEK_SET);
 990
 991         if (strcmp(ct->c_storage, "-")==0) {
 992                 int gd;
 993
 994                 if ((gd = dup(fileno(stdout))) == NOTOK) {
 995                         advise("stdout", "unable to dup");
 996                         return NOTOK;
 997                 }
 998                 if ((fp = fdopen(gd, appending ? "a" : "w")) == NULL) {
 999                         advise("stdout", "unable to fdopen (%d, \"%s\") from",
1000                                         gd, appending ? "a" : "w");
1001                         close(gd);
1002                         return NOTOK;
1003                 }
1004         } else {
1005                 if ((fp = fopen(ct->c_storage, appending ? "a" : "w"))
1006                                 == NULL) {
1007                         advise(ct->c_storage, "unable to fopen for %s",
1008                                         appending ? "appending" : "writing");
1009                         return NOTOK;
1010                 }
1011         }
1012
1013         /*
1014         ** Copy a few of the header fields of the initial
1015         ** enclosing message/partial into the file.
1016         */
1017         filterstate = 0;
1018         if (ct->c_type == CT_MESSAGE && ct->c_subtype == MESSAGE_PARTIAL) {
1019                 struct partial *pm = (struct partial *) ct->c_ctparams;
1020
1021                 if (pm->pm_partno == 1) {
1022                         copy_some_headers(fp, ct);
1023                         filterstate = 1;
1024                 }
1025         }
1026
1027         while (fgets(buffer, sizeof(buffer) - 1, ct->c_fp)) {
1028                 if ((pos += strlen(buffer)) > last) {
1029                         int diff;
1030
1031                         diff = strlen(buffer) - (pos - last);
1032                         if (diff >= 0)
1033                                 buffer[diff] = '\0';
1034                 }
1035                 /*
1036                 ** If this is the first content of a group of
1037                 ** message/partial contents, then we only copy a few
1038                 ** of the header fields of the enclosed message.
1039                 */
1040                 if (filterstate) {
1041                         switch (buffer[0]) {
1042                         case ' ':
1043                         case '\t':
1044                                 if (filterstate < 0)
1045                                         buffer[0] = 0;
1046                                 break;
1047
1048                         case '\n':
1049                                 filterstate = 0;
1050                                 break;
1051
1052                         default:
1053                                 if (!uprf(buffer, XXX_FIELD_PRF) && !uprf(buffer, VRSN_FIELD) && !uprf(buffer, "Subject:") && !uprf(buffer, "Message-ID:")) {
1054                                         filterstate = -1;
1055                                         buffer[0] = 0;
1056                                         break;
1057                                 }
1058                                 filterstate = 1;
1059                                 break;
1060                         }
1061                 }
1062                 fputs(buffer, fp);
1063                 if (pos >= last)
1064                         break;
1065         }
1066
1067         if (fflush(fp))
1068                 advise(ct->c_storage, "error writing to");
1069
1070         fclose(fp);
1071         fclose(ct->c_fp);
1072         ct->c_fp = NULL;
1073         return OK;
1074 }
1075
1076
1077 /*
1078 ** Add a file to a folder.
1079 **
1080 ** Return the new message number of the file
1081 ** when added to the folder.  Return -1, if
1082 ** there is an error.
1083 */
1084
1085 static int
1086 output_content_folder(char *folder, char *filename)
1087 {
1088         int msgnum;
1089         struct msgs *mp;
1090
1091         /* Read the folder. */
1092         if ((mp = folder_read(folder))) {
1093                 /* Link file into folder */
1094                 msgnum = folder_addmsg(&mp, filename, 0, 0, 0, 0, NULL);
1095         } else {
1096                 advise(NULL, "unable to read folder %s", folder);
1097                 return NOTOK;
1098         }
1099
1100         /* free folder structure */
1101         folder_free(mp);
1102
1103         /*
1104         ** Return msgnum.  We are relying on the fact that
1105         ** msgnum will be -1, if folder_addmsg() had an error.
1106         */
1107         return msgnum;
1108 }
1109
1110
1111 /*
1112 ** Parse and expand the storage formatting string
1113 ** pointed to by "cp" into "buffer".
1114 */
1115
1116 static int
1117 parse_format_string(CT ct, char *cp, char *buffer, int buflen, char *dir)
1118 {
1119         int len;
1120         char *bp;
1121         CI ci = &ct->c_ctinfo;
1122
1123         /*
1124         ** If storage string is "-", just copy it, and
1125         ** return (send content to standard output).
1126         */
1127         if (cp[0] == '-' && cp[1] == '\0') {
1128                 strncpy(buffer, cp, buflen);
1129                 return 0;
1130         }
1131
1132         bp = buffer;
1133         bp[0] = '\0';
1134
1135         /*
1136         ** If formatting string is a pathname that doesn't
1137         ** begin with '/', then preface the path with the
1138         ** appropriate directory.
1139         */
1140         if (*cp != '/' && *cp != '|' && *cp != '!') {
1141                 snprintf(bp, buflen, "%s/", dir[1] ? dir : "");
1142                 len = strlen(bp);
1143                 bp += len;
1144                 buflen -= len;
1145         }
1146
1147         for (; *cp; cp++) {
1148
1149                 /* We are processing a storage escape */
1150                 if (*cp == '%') {
1151                         switch (*++cp) {
1152                         case 'a':
1153                                 /*
1154                                 ** Insert parameters from Content-Type.
1155                                 ** This is only valid for '|' commands.
1156                                 */
1157                                 if (buffer[0] != '|' && buffer[0] != '!') {
1158                                         *bp++ = *--cp;
1159                                         *bp = '\0';
1160                                         buflen--;
1161                                         continue;
1162                                 } else {
1163                                         char **ap, **ep;
1164                                         char *s = "";
1165
1166                                         for (ap=ci->ci_attrs, ep=ci->ci_values;
1167                                                          *ap; ap++, ep++) {
1168                                                 snprintf(bp, buflen,
1169                                                                 "%s%s=\"%s\"",
1170                                                                 s, *ap, *ep);
1171                                                 len = strlen(bp);
1172                                                 bp += len;
1173                                                 buflen -= len;
1174                                                 s = " ";
1175                                         }
1176                                 }
1177                                 break;
1178
1179                         case 'm':
1180                                 /* insert message number */
1181                                 snprintf(bp, buflen, "%s",
1182                                                 mhbasename(ct->c_file));
1183                                 break;
1184
1185                         case 'P':
1186                                 /* insert part number with leading dot */
1187                                 if (ct->c_partno)
1188                                         snprintf(bp, buflen, ".%s",
1189                                                         ct->c_partno);
1190                                 break;
1191
1192                         case 'p':
1193                                 /* insert part number withouth leading dot */
1194                                 if (ct->c_partno)
1195                                         strncpy(bp, ct->c_partno, buflen);
1196                                 break;
1197
1198                         case 't':
1199                                 /* insert content type */
1200                                 strncpy(bp, ci->ci_type, buflen);
1201                                 break;
1202
1203                         case 's':
1204                                 /* insert content subtype */
1205                                 strncpy(bp, ci->ci_subtype, buflen);
1206                                 break;
1207
1208                         case '%':
1209                                 /* insert the character % */
1210                                 goto raw;
1211
1212                         default:
1213                                 *bp++ = *--cp;
1214                                 *bp = '\0';
1215                                 buflen--;
1216                                 continue;
1217                         }
1218
1219                         /* Advance bp and decrement buflen */
1220                         len = strlen(bp);
1221                         bp += len;
1222                         buflen -= len;
1223
1224                 } else {
1225 raw:
1226                         *bp++ = *cp;
1227                         *bp = '\0';
1228                         buflen--;
1229                 }
1230         }
1231
1232         return 0;
1233 }
1234
1235
1236 /*
1237 ** Copy some of the header fields of the initial message/partial
1238 ** message into the header of the reassembled message.
1239 */
1240
1241 static int
1242 copy_some_headers(FILE *out, CT ct)
1243 {
1244         HF hp;
1245
1246         hp = ct->c_first_hf;  /* start at first header field */
1247
1248         while (hp) {
1249                 /*
1250                 ** A few of the header fields of the enclosing
1251                 ** messages are not copied.
1252                 */
1253                 if (!uprf(hp->name, XXX_FIELD_PRF) &&
1254                                 mh_strcasecmp(hp->name, VRSN_FIELD) &&
1255                                 mh_strcasecmp(hp->name, "Subject") &&
1256                                 mh_strcasecmp(hp->name, "Message-ID"))
1257                         fprintf(out, "%s:%s", hp->name, hp->value);
1258                 hp = hp->next;  /* next header field */
1259         }
1260
1261         return OK;
1262 }