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