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