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

   1 /*
   2 ** spost.c -- feed messages to sendmail
   3 **
   4 ** This is a simpler, faster, replacement for "post" for use
   5 ** when "sendmail" is the transport system.
   6 **
   7 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   8 ** COPYRIGHT file in the root directory of the nmh distribution for
   9 ** complete copyright information.
  10 */
  11
  12 #include <h/mh.h>
  13 #include <signal.h>
  14 #include <h/addrsbr.h>
  15 #include <h/aliasbr.h>
  16 #include <h/dropsbr.h>
  17 #include <h/tws.h>
  18 #include <h/mts.h>
  19 #include <h/utils.h>
  20
  21 #define MAX_SM_FIELD 1476  /* < largest hdr field sendmail will accept */
  22 #define FCCS 10  /* max number of fccs allowed */
  23
  24 struct swit switches[] = {
  25 #define FILTSW  0
  26         { "filter filterfile", 0 },
  27 #define NFILTSW  1
  28         { "nofilter", 0 },
  29 #define VERBSW  2
  30         { "verbose", 0 },
  31 #define NVERBSW  3
  32         { "noverbose", 0 },
  33 #define WATCSW  4
  34         { "watch", 0 },
  35 #define NWATCSW  5
  36         { "nowatch", 0 },
  37 #define BACKSW  6
  38         { "backup", 0 },
  39 #define NBACKSW  7
  40         { "nobackup", 0 },
  41 #define ALIASW  8
  42         { "alias aliasfile", 0 },
  43 #define NALIASW  9
  44         { "noalias", 0 },
  45 #define VERSIONSW  10
  46         { "version", 0 },
  47 #define HELPSW  11
  48         { "help", 0 },
  49 #define DEBUGSW  12
  50         { "debug", -5 },
  51 #define DISTSW  13
  52         { "dist", -4 },  /* interface from dist */
  53 #define PUSHSW  14  /* fork to sendmail then exit */
  54         { "push", -4 },
  55 #define NPUSHSW  15  /* exec sendmail */
  56         { "nopush", -6 },
  57 #define LIBSW  16
  58         { "library directory", -7 },
  59         { NULL, 0 }
  60 };
  61
  62
  63 /* flags for headers->flags */
  64 #define HNOP  0x0000  /* just used to keep .set around */
  65 #define HBAD  0x0001  /* bad header - don't let it through */
  66 #define HADR  0x0002  /* header has an address field */
  67 #define HSUB  0x0004  /* Subject: header */
  68 #define HTRY  0x0008  /* try to send to addrs on header */
  69 #define HBCC  0x0010  /* don't output this header */
  70 #define HMNG  0x0020  /* mung this header */
  71 #define HNGR  0x0040  /* no groups allowed in this header */
  72 #define HFCC  0x0080  /* FCC: type header */
  73 #define HNIL  0x0100  /* okay for this header not to have addrs */
  74 #define HIGN  0x0200  /* ignore this header */
  75
  76 /* flags for headers->set */
  77 #define MFRM  0x0001  /* we've seen a From: */
  78 #define MDAT  0x0002  /* we've seen a Date: */
  79 #define MRFM  0x0004  /* we've seen a Resent-From: */
  80 #define MVIS  0x0008  /* we've seen sighted addrs */
  81 #define MINV  0x0010  /* we've seen blind addrs */
  82 #define MRDT  0x0020  /* we've seen a Resent-Date: */
  83
  84 struct headers {
  85         char *value;
  86         unsigned int flags;
  87         unsigned int set;
  88 };
  89
  90
  91 static struct headers NHeaders[] = {
  92         { "Return-Path", HBAD, 0 },
  93         { "Received", HBAD, 0 },
  94         { "Reply-To", HADR|HNGR, 0 },
  95         { "From", HADR|HNGR, MFRM },
  96         { "Sender", HADR|HBAD, 0 },
  97         { "Date", HNOP, MDAT },
  98         { "Subject", HSUB, 0 },
  99         { "To", HADR|HTRY, MVIS },
 100         { "Cc", HADR|HTRY, MVIS },
 101         { "Bcc", HADR|HTRY|HBCC|HNIL, MINV },
 102         { "Message-Id", HBAD, 0 },
 103         { "Fcc", HFCC, 0 },
 104         { NULL, 0, 0 }
 105 };
 106
 107 static struct headers RHeaders[] = {
 108         { "Resent-Reply-To",   HADR|HNGR, 0 },
 109         { "Resent-From", HADR|HNGR, MRFM },
 110         { "Resent-Sender", HADR|HBAD, 0 },
 111         { "Resent-Date", HNOP, MRDT },
 112         { "Resent-Subject", HSUB, 0 },
 113         { "Resent-To", HADR|HTRY, MVIS },
 114         { "Resent-Cc", HADR|HTRY, MVIS },
 115         { "Resent-Bcc", HADR|HTRY|HBCC, MINV },
 116         { "Resent-Message-Id", HBAD, 0 },
 117         { "Resent-Fcc", HFCC, 0 },
 118         { "Reply-To", HADR, 0 },
 119         { "Fcc", HIGN, 0 },
 120         { NULL, 0, 0 }
 121 };
 122
 123
 124 static int badmsg = 0;  /* message has bad semantics */
 125 static int verbose = 0;  /* spell it out */
 126 static int debug = 0;  /* debugging post */
 127 static int watch = 0;  /* watch the delivery process */
 128 static int backflg = 0;  /* prepend backup prefix to input file when done */
 129 static int pushflg = 0;  /* if going to fork to sendmail */
 130 static int aliasflg = 0;  /* if going to process aliases */
 131
 132 static unsigned msgflags = 0;  /* what we've seen */
 133
 134 static enum {
 135         normal, resent
 136 } msgstate = normal;
 137
 138 static char tmpfil[] = "/tmp/pstXXXXXX";
 139
 140 static char from[BUFSIZ];  /* my network address */
 141 static char signature[BUFSIZ];  /* my signature */
 142 static char *filter = NULL;  /* the filter for BCC'ing */
 143 static char *subject = NULL;  /* the subject field for BCC'ing */
 144 static char *fccfold[FCCS];  /* foldernames for FCC'ing */
 145 static short fccind = 0;  /* index into fccfold[] */
 146
 147 static struct headers *hdrtab;  /* table for the message we're doing */
 148 static FILE *out;  /* output (temp) file */
 149
 150 extern char *sendmail;
 151
 152 /*
 153 ** external prototypes
 154 */
 155 extern char *getfullname(void);
 156 extern char *getusername(void);
 157
 158 /*
 159 ** static prototypes
 160 */
 161 static void putfmt(char *, char *, FILE *);
 162 static void start_headers(void);
 163 static void finish_headers(FILE *);
 164 static int get_header(char *, struct headers *);
 165 static void putadr(char *, struct mailname *);
 166 static int putone(char *, int, int);
 167 static void insert_fcc(char *, unsigned char *);
 168 static void fcc(char *, char *);
 169
 170 #if 0
 171 static void make_bcc_file(void);
 172 #endif
 173
 174
 175 int
 176 main(int argc, char **argv)
 177 {
 178         int state, i, pid, compnum;
 179         char *cp, *msg = NULL, **argp, **arguments;
 180         char *sargv[16], buf[BUFSIZ], name[NAMESZ];
 181         FILE *in;
 182
 183 #ifdef LOCALE
 184         setlocale(LC_ALL, "");
 185 #endif
 186         invo_name = mhbasename(argv[0]);
 187
 188         /* foil search of user profile/context */
 189         if (context_foil(NULL) == -1)
 190                 done(1);
 191
 192         mts_init(invo_name);
 193         arguments = getarguments(invo_name, argc, argv, 0);
 194         argp = arguments;
 195
 196         while ((cp = *argp++)) {
 197                 if (*cp == '-') {
 198                         switch (smatch(++cp, switches)) {
 199                         case AMBIGSW:
 200                                 ambigsw(cp, switches);
 201                                 done(1);
 202                         case UNKWNSW:
 203                                 adios(NULL, "-%s unknown", cp);
 204
 205                         case HELPSW:
 206                                 snprintf(buf, sizeof(buf),
 207                                                 "%s [switches] file",
 208                                                 invo_name);
 209                                 print_help(buf, switches, 1);
 210                                 done(1);
 211                         case VERSIONSW:
 212                                 print_version(invo_name);
 213                                 done(1);
 214
 215                         case DEBUGSW:
 216                                 debug++;
 217                                 continue;
 218
 219                         case DISTSW:
 220                                 msgstate = resent;
 221                                 continue;
 222
 223                         case FILTSW:
 224                                 if (!(filter = *argp++) || *filter == '-')
 225                                         adios(NULL, "missing argument to %s",
 226                                                         argp[-2]);
 227                                 continue;
 228                         case NFILTSW:
 229                                 filter = NULL;
 230                                 continue;
 231
 232                         case BACKSW:
 233                                 backflg++;
 234                                 continue;
 235                         case NBACKSW:
 236                                 backflg = 0;
 237                                 continue;
 238
 239                         case VERBSW:
 240                                 verbose++;
 241                                 continue;
 242                         case NVERBSW:
 243                                 verbose = 0;
 244                                 continue;
 245
 246                         case WATCSW:
 247                                 watch++;
 248                                 continue;
 249                         case NWATCSW:
 250                                 watch = 0;
 251                                 continue;
 252
 253                         case PUSHSW:
 254                                 pushflg++;
 255                                 continue;
 256                         case NPUSHSW:
 257                                 pushflg = 0;
 258                                 continue;
 259
 260                         case ALIASW:
 261                                 if (!(cp = *argp++) || *cp == '-')
 262                                         adios(NULL, "missing argument to %s",
 263                                                         argp[-2]);
 264                                 aliasflg = 1;
 265                                 if ((state = alias(cp)) != AK_OK)
 266                                         adios(NULL, "aliasing error in file %s - %s", cp, akerror(state));
 267                                 continue;
 268                         case NALIASW:
 269                                 aliasflg = 0;
 270                                 continue;
 271
 272                         case LIBSW:
 273                                 if (!(cp = *argp++) || *cp == '-')
 274                                         adios(NULL, "missing argument to %s",
 275                                                         argp[-2]);
 276                                 /* create a minimal context */
 277                                 if (context_foil(cp) == -1)
 278                                         done(1);
 279                                 continue;
 280                         }
 281                 }
 282                 if (msg)
 283                         adios(NULL, "only one message at a time!");
 284                 else
 285                         msg = cp;
 286         }
 287
 288         if (!msg)
 289                 adios(NULL, "usage: %s [switches] file", invo_name);
 290
 291         if ((in = fopen(msg, "r")) == NULL)
 292                 adios(msg, "unable to open");
 293
 294         start_headers();
 295         if (debug) {
 296                 verbose++;
 297                 out = stdout;
 298         } else {
 299 #ifdef HAVE_MKSTEMP
 300                 if ((out = fdopen(mkstemp(tmpfil), "w")) == NULL)
 301                         adios(tmpfil, "unable to create");
 302 #else
 303                 mktemp(tmpfil);
 304                 if ((out = fopen(tmpfil, "w")) == NULL)
 305                         adios(tmpfil, "unable to create");
 306                 chmod(tmpfil, 0600);
 307 #endif
 308         }
 309
 310         hdrtab = (msgstate == normal) ? NHeaders : RHeaders;
 311
 312         for (compnum = 1, state = FLD;;) {
 313                 switch (state = m_getfld(state, name, buf, sizeof(buf), in)) {
 314                 case FLD:
 315                         compnum++;
 316                         putfmt(name, buf, out);
 317                         continue;
 318
 319                 case FLDPLUS:
 320                         compnum++;
 321                         cp = add(buf, cp);
 322                         while (state == FLDPLUS) {
 323                                 state = m_getfld(state, name, buf,
 324                                                 sizeof(buf), in);
 325                                 cp = add(buf, cp);
 326                         }
 327                         putfmt(name, cp, out);
 328                         free(cp);
 329                         continue;
 330
 331                 case BODY:
 332                         finish_headers(out);
 333                         fprintf(out, "\n%s", buf);
 334                         while (state == BODY) {
 335                                 state = m_getfld(state, name, buf,
 336                                                 sizeof(buf), in);
 337                                 fputs(buf, out);
 338                         }
 339                         break;
 340
 341                 case FILEEOF:
 342                         finish_headers(out);
 343                         break;
 344
 345                 case LENERR:
 346                 case FMTERR:
 347                         adios(NULL, "message format error in component #%d",
 348                                         compnum);
 349
 350                 default:
 351                         adios(NULL, "getfld() returned %d", state);
 352                 }
 353                 break;
 354         }
 355         fclose(in);
 356
 357         if (backflg) {
 358                 strncpy(buf, m_backup(msg), sizeof(buf));
 359                 if (rename(msg, buf) == NOTOK)
 360                         advise(buf, "unable to rename %s to", msg);
 361         }
 362
 363         if (debug) {
 364                 /* stop here */
 365                 done(0);
 366         }
 367
 368         fclose(out);
 369
 370         /* process Fcc */
 371         for (i=0; i<fccind; i++) {
 372                 fcc(tmpfil, fccfold[i]);
 373         }
 374
 375         /*
 376         ** re-open the temp file, unlink it and exec sendmail, giving it
 377         ** the msg temp file as std in.
 378         */
 379         if (!freopen(tmpfil, "r", stdin)) {
 380                 adios(tmpfil, "can't reopen for sendmail");
 381         }
 382         unlink(tmpfil);
 383
 384         argp = sargv;
 385         *argp++ = "send-mail";
 386         *argp++ = "-m";  /* send to me too */
 387         *argp++ = "-t";  /* read msg for recipients */
 388         *argp++ = "-i";  /* don't stop on "." */
 389         if (watch || verbose)
 390                 *argp++ = "-v";
 391         *argp = NULL;
 392
 393         if (pushflg && !(watch || verbose)) {
 394                 /* fork to a child to run sendmail */
 395                 for (i=0; (pid = fork()) == NOTOK && i < 5; i++)
 396                         sleep(5);
 397                 switch (pid) {
 398                 case NOTOK:
 399                         fprintf(verbose ? stdout : stderr,
 400                                         "%s: can't fork to %s\n",
 401                                         invo_name, sendmail);
 402                         exit(-1);
 403                 case OK:
 404                         /* we're the child .. */
 405                         break;
 406                 default:
 407                         exit(0);
 408                 }
 409         }
 410         execv(sendmail, sargv);
 411         adios(sendmail, "can't exec");
 412         return 0;  /* dead code to satisfy the compiler */
 413 }
 414
 415 /* DRAFT GENERATION */
 416
 417 static void
 418 putfmt(char *name, char *str, FILE *out)
 419 {
 420         int i;
 421         char *cp, *pp;
 422         struct headers *hdr;
 423
 424         while (*str == ' ' || *str == '\t')
 425                 str++;
 426
 427         if ((i = get_header(name, hdrtab)) == NOTOK) {
 428                 /* some boring header: push it through */
 429                 fprintf(out, "%s: %s", name, str);
 430                 return;
 431         }
 432
 433         /* one of the interesting headers */
 434         hdr = &hdrtab[i];
 435         if (hdr->flags & HIGN) {
 436                 return;
 437         }
 438         if (hdr->flags & HBAD) {
 439                 advise(NULL, "illegal header line -- %s:", name);
 440                 badmsg++;
 441                 return;
 442         }
 443         msgflags |= hdr->set;
 444
 445         if (hdr->flags & HSUB) {
 446                 if (subject) {
 447                         /* append mupliple subject */
 448                         char *cp = concat(subject, "\t", str, NULL);
 449                         free(subject);
 450                         subject = cp;
 451                 } else {
 452                         subject = getcpy(str);
 453                 }
 454         }
 455
 456         if (hdr->flags & HFCC) {
 457                 if ((cp = strrchr(str, '\n'))) {
 458                         *cp = '\0';
 459                 }
 460                 for (cp = pp = str; (cp = strchr(pp, ',')); pp = cp) {
 461                         *cp++ = '\0';
 462                         insert_fcc(hdr->value, pp);
 463                 }
 464                 insert_fcc(hdr->value, pp);
 465                 return;
 466         }
 467
 468 #ifdef notdef
 469         if (hdr->flags & HBCC) {
 470                 insert_bcc(str);
 471                 return;
 472         }
 473 #endif /* notdef */
 474
 475         if (*str != '\n' && *str != '\0') {
 476                 if (aliasflg && hdr->flags & HTRY) {
 477                         /*
 478                         ** this header contains address(es) that we have to do
 479                         ** alias expansion on.  Because of the saved state in
 480                         ** getname we have to put all the addresses into a
 481                         ** list. We then let putadr munch on that list,
 482                         ** possibly expanding aliases.
 483                         **/
 484                         register struct mailname *f = 0;
 485                         register struct mailname *mp = 0;
 486
 487                         while ((cp = getname(str))) {
 488                                 mp = getm(cp, NULL, 0, AD_HOST, NULL);
 489                                 if (f == 0) {
 490                                         f = mp;
 491                                         mp->m_next = mp;
 492                                 } else {
 493                                         mp->m_next = f->m_next;
 494                                         f->m_next = mp;
 495                                         f = mp;
 496                                 }
 497                         }
 498                         f = mp->m_next; mp->m_next = 0;
 499                         putadr(name, f);
 500                 } else {
 501                         /*
 502                         ** The author(s) of spost decided that alias
 503                         ** substitution wasn't necessary for the non-HTRY
 504                         ** headers.  Unfortunately, one of those headers
 505                         ** is "From:", and having alias substitution
 506                         ** work on that is extremely useful for someone
 507                         ** with a lot of POP3 email accounts or aliases.
 508                         ** post supports aliasing of "From:"...
 509                         **
 510                         ** Since "From:"-processing is incompletely
 511                         ** implemented in this unsupported and
 512                         ** undocumented spost backend, I'm not
 513                         ** going to take the time to implement my new
 514                         ** draft-From:-based email address masquerading.
 515                         ** If I do ever implement it here, I'd almost
 516                         ** certainly want to implement "From:" line
 517                         ** alias processing as well.
 518                         ** -- Dan Harkless <dan-nmh@dilvish.speed.net>
 519                         */
 520                         fprintf(out, "%s: %s", name, str);
 521                 }
 522         }
 523 }
 524
 525
 526 /*
 527 ** Construct signature name
 528 */
 529 static void
 530 start_headers(void)
 531 {
 532         char *cp;
 533
 534         strncpy(from, getusername(), sizeof(from));
 535         if ((cp = getfullname()) && *cp) {
 536                 snprintf(signature, sizeof(signature), "%s <%s>", cp, from);
 537         } else {
 538                 snprintf(signature, sizeof(signature), "%s", from);
 539         }
 540 }
 541
 542
 543 /*
 544 ** Add yet missing headers.
 545 */
 546 static void
 547 finish_headers(FILE *out)
 548 {
 549         char *resentstr = (msgstate == resent) ? "Resent-" : "";
 550
 551         if (!(msgflags & MDAT)) {
 552                 fprintf(out, "%sDate: %s\n", resentstr, dtimenow(0));
 553         }
 554         if (!(msgflags & MFRM)) {
 555                 fprintf(out, "%sFrom: %s\n", resentstr, signature);
 556         } else {
 557                 /* Add a Sender: header in case the From: header is fake. */
 558                 fprintf(out, "%sSender: %s\n", resentstr, from);
 559         }
 560 #ifdef notdef
 561         if (!(msgflags & MVIS))
 562                 fprintf(out, "%sBcc: Blind Distribution List: ;\n", resentstr);
 563 #endif /* notdef */
 564
 565         if (badmsg) {
 566                 adios(NULL, "re-format message and try again");
 567         }
 568 }
 569
 570
 571 /*
 572 ** Return index of the requested header in the table, or NOTOK if missing.
 573 */
 574 static int
 575 get_header(char *header, struct headers *table)
 576 {
 577         struct headers *h;
 578
 579         for (h=table; h->value; h++) {
 580                 if (mh_strcasecmp(header, h->value)==0) {
 581                         return (h - table);
 582                 }
 583         }
 584
 585         return NOTOK;
 586 }
 587
 588
 589 /*
 590 ** output the address list for header "name".  The address list
 591 ** is a linked list of mailname structs.  "nl" points to the head
 592 ** of the list.  Alias substitution should be done on nl.
 593 */
 594 static void
 595 putadr(char *name, struct mailname *nl)
 596 {
 597         register struct mailname *mp, *mp2;
 598         register int linepos;
 599         register char *cp;
 600         int namelen;
 601
 602         fprintf(out, "%s: ", name);
 603         namelen = strlen(name) + 2;
 604         linepos = namelen;
 605
 606         for (mp = nl; mp; ) {
 607                 if (linepos > MAX_SM_FIELD) {
 608                         fprintf(out, "\n%s: ", name);
 609                         linepos = namelen;
 610                 }
 611                 if (mp->m_nohost) {
 612                         /* a local name - see if it's an alias */
 613                         cp = akvalue(mp->m_mbox);
 614                         if (cp == mp->m_mbox) {
 615                                 /* wasn't an alias - use what the user typed */
 616                                 linepos = putone(mp->m_text, linepos, namelen);
 617                         } else {
 618                                 /* an alias - expand it */
 619                                 while ((cp = getname(cp))) {
 620                                         if (linepos > MAX_SM_FIELD) {
 621                                                 fprintf(out, "\n%s: ", name);
 622                                                 linepos = namelen;
 623                                         }
 624                                         mp2 = getm(cp, NULL, 0, AD_HOST, NULL);
 625                                         if (akvisible()) {
 626                                                 mp2->m_pers = getcpy(mp->m_mbox);
 627                                                 linepos = putone(adrformat(mp2), linepos, namelen);
 628                                         } else {
 629                                                 linepos = putone(mp2->m_text,
 630                                                                 linepos,
 631                                                                 namelen);
 632                                         }
 633                                         mnfree(mp2);
 634                                 }
 635                         }
 636                 } else {
 637                         /* not a local name - use what the user typed */
 638                         linepos = putone(mp->m_text, linepos, namelen);
 639                 }
 640                 mp2 = mp;
 641                 mp = mp->m_next;
 642                 mnfree(mp2);
 643         }
 644         putc('\n', out);
 645 }
 646
 647 static int
 648 putone(char *adr, int pos, int indent)
 649 {
 650         register int len;
 651         static int linepos;
 652
 653         len = strlen(adr);
 654         if (pos == indent)
 655                 linepos = pos;
 656         else if (linepos+len > OUTPUTLINELEN) {
 657                 fprintf(out, ",\n%*s", indent, "");
 658                 linepos = indent;
 659                 pos += indent + 2;
 660         } else {
 661                 fputs(", ", out);
 662                 linepos += 2;
 663                 pos += 2;
 664         }
 665         fputs(adr, out);
 666
 667         linepos += len;
 668         return (pos+len);
 669 }
 670
 671
 672 /*
 673 ** Insert the normalized value from pp into fccfold[].
 674 */
 675 static void
 676 insert_fcc(char *name, unsigned char *pp)
 677 {
 678         unsigned char *cp;
 679
 680         for (cp = pp; isspace(*cp); cp++)
 681                 continue;
 682         for (pp += strlen(pp) - 1; pp > cp && isspace(*pp); pp--)
 683                 continue;
 684         if (pp >= cp)
 685                 *++pp = '\0';
 686         if (!*cp)
 687                 return;
 688
 689         if (fccind >= FCCS)
 690                 adios(NULL, "too many %ss", name);
 691         fccfold[fccind++] = getcpy(cp);
 692 }
 693
 694 #if 0
 695 /* BCC GENERATION */
 696
 697 static void
 698 make_bcc_file(void)
 699 {
 700         pid_t child_id;
 701         int fd, i, status;
 702         char *vec[6];
 703         FILE * in, *out;
 704
 705 #ifdef HAVE_MKSTEMP
 706         fd = mkstemp(bccfil);
 707         if (fd == -1 || (out = fdopen(fd, "w")) == NULL)
 708                 adios(bccfil, "unable to create");
 709 #else
 710         mktemp(bccfil);
 711         if ((out = fopen(bccfil, "w")) == NULL)
 712                 adios(bccfil, "unable to create");
 713 #endif
 714         chmod(bccfil, 0600);
 715
 716         fprintf(out, "Date: %s\n", dtimenow(0));
 717         if (!(msgflags & MFRM)) {
 718                 /* Construct a From: header. */
 719                 fprintf(out, "From: %s\n", signature);
 720         } else {
 721                 /* Add a Sender: header in case the From: header is fake. */
 722                 fprintf(out, "Sender: %s\n", from);
 723         }
 724         if (subject)
 725                 fprintf(out, "Subject: %s", subject);
 726         fprintf(out, "BCC:\n\n------- Blind-Carbon-Copy\n\n");
 727         fflush(out);
 728
 729         if (!filter) {
 730                 if ((fd = open(tmpfil, O_RDONLY)) == NOTOK)
 731                         adios(NULL, "unable to re-open");
 732                 cpydgst(fd, fileno(out), tmpfil, bccfil);
 733                 close(fd);
 734         } else {
 735                 vec[0] = mhbasename(mhlproc);
 736
 737                 for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 738                         sleep(5);
 739                 switch (child_id) {
 740                 case NOTOK:
 741                         adios("fork", "unable to");
 742
 743                 case OK:
 744                         dup2(fileno(out), 1);
 745
 746                         i = 1;
 747                         vec[i++] = "-forward";
 748                         vec[i++] = "-form";
 749                         vec[i++] = filter;
 750                         vec[i++] = tmpfil;
 751                         vec[i] = NULL;
 752
 753                         execvp(mhlproc, vec);
 754                         adios(mhlproc, "unable to exec");
 755
 756                 default:
 757                         if (status = pidwait(child_id, OK))
 758                                 admonish(NULL, "%s lost (status=0%o)",
 759                                                 vec[0], status);
 760                         break;
 761                 }
 762         }
 763
 764         fseek(out, 0L, SEEK_END);
 765         fprintf(out, "\n------- End of Blind-Carbon-Copy\n");
 766         fclose(out);
 767 }
 768 #endif /* if 0 */
 769
 770
 771 /* FCC INTERACTION */
 772
 773 static void
 774 fcc(char *file, char *folder)
 775 {
 776         pid_t child_id;
 777         int i, status;
 778         char fold[BUFSIZ];
 779
 780         if (verbose)
 781                 printf("%sFcc: %s\n", msgstate == resent ? "Resent-" : "",
 782                                 folder);
 783         fflush(stdout);
 784
 785         for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 786                 sleep(5);
 787         switch (child_id) {
 788         case NOTOK:
 789                 if (verbose) {
 790                         printf("Sorry man, but we had no more forks.\n");
 791                 } else {
 792                         fprintf(stderr, "Skipped %sFcc %s: unable to fork.\n",
 793                                         msgstate == resent ? "Resent-" : "",
 794                                         folder);
 795                 }
 796                 break;
 797
 798         case OK:
 799                 snprintf(fold, sizeof(fold), "%s%s",
 800                                 *folder == '+' || *folder == '@' ? "" : "+",
 801                                 folder);
 802                 execlp(fileproc, mhbasename(fileproc),
 803                                 "-link", "-file", file, fold, NULL);
 804                 _exit(-1);
 805
 806         default:
 807                 if ((status = pidwait(child_id, OK))) {
 808                         if (verbose) {
 809                                 printf(" errored (0%o)\n", status);
 810                         } else {
 811                                 fprintf(stderr, "  %sFcc %s: errored (0%o)\n",
 812                                                 msgstate == resent ?
 813                                                 "Resent-" : "", folder,
 814                                                 status);
 815                         }
 816                 }
 817         }
 818
 819         fflush(stdout);
 820 }