diplodocus.org Git - nmh/blob - uip/spost.c

   1
   2 /*
   3  * spost.c -- feed messages to sendmail
   4  *
   5  * This is a simpler, faster, replacement for "post" for use
   6  * when "sendmail" is the transport system.
   7  *
   8  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   9  * COPYRIGHT file in the root directory of the nmh distribution for
  10  * complete copyright information.
  11  */
  12
  13 #include <h/mh.h>
  14 #include <signal.h>
  15 #include <h/addrsbr.h>
  16 #include <h/aliasbr.h>
  17 #include <h/dropsbr.h>
  18 #include <h/tws.h>
  19 #include <h/mts.h>
  20 #include <h/utils.h>
  21
  22 #define MAX_SM_FIELD    1476    /* < largest hdr field sendmail will accept */
  23 #define FCCS            10      /* max number of fccs allowed */
  24
  25 struct swit switches[] = {
  26 #define FILTSW               0
  27     { "filter filterfile", 0 },
  28 #define NFILTSW              1
  29     { "nofilter", 0 },
  30 #define REMVSW               2
  31     { "remove", 0 },
  32 #define NREMVSW              3
  33     { "noremove", 0 },
  34 #define VERBSW               4
  35     { "verbose", 0 },
  36 #define NVERBSW              5
  37     { "noverbose", 0 },
  38 #define WATCSW               6
  39     { "watch", 0 },
  40 #define NWATCSW              7
  41     { "nowatch", 0 },
  42 #define BACKSW               8
  43     { "backup", 0 },
  44 #define NBACKSW              9
  45     { "nobackup", 0 },
  46 #define ALIASW              10
  47     { "alias aliasfile", 0 },
  48 #define NALIASW             11
  49     { "noalias", 0 },
  50 #define WIDTHSW             12
  51     { "width columns", 0 },
  52 #define VERSIONSW           13
  53     { "version", 0 },
  54 #define HELPSW              14
  55     { "help", 0 },
  56 #define DEBUGSW             15
  57     { "debug", -5 },
  58 #define DISTSW              16
  59     { "dist", -4 },             /* interface from dist */
  60 #define WHOMSW              17
  61     { "whom", -4 },             /* interface from whom */
  62 #define PUSHSW              18  /* fork to sendmail then exit */
  63     { "push", -4 },
  64 #define NPUSHSW             19  /* exec sendmail */
  65     { "nopush", -6 },
  66 #define LIBSW               20
  67     { "library directory", -7 },
  68 #define ANNOSW              21
  69     { "idanno number", -6 },
  70     { NULL, 0 }
  71 };
  72
  73
  74 /* flags for headers->flags */
  75 #define HNOP    0x0000          /* just used to keep .set around */
  76 #define HBAD    0x0001          /* bad header - don't let it through */
  77 #define HADR    0x0002          /* header has an address field */
  78 #define HSUB    0x0004          /* Subject: header */
  79 #define HTRY    0x0008          /* try to send to addrs on header */
  80 #define HBCC    0x0010          /* don't output this header */
  81 /* #define      HMNG    0x0020  */      /* munge this header */
  82 #define HNGR    0x0040          /* no groups allowed in this header */
  83 #define HFCC    0x0080          /* FCC: type header */
  84 #define HNIL    0x0100          /* okay for this header not to have addrs */
  85 #define HIGN    0x0200          /* ignore this header */
  86
  87 /* flags for headers->set */
  88 #define MFRM    0x0001          /* we've seen a From: */
  89 #define MDAT    0x0002          /* we've seen a Date: */
  90 #define MRFM    0x0004          /* we've seen a Resent-From: */
  91 #define MVIS    0x0008          /* we've seen sighted addrs */
  92 #define MINV    0x0010          /* we've seen blind addrs */
  93 #define MRDT    0x0020          /* we've seen a Resent-Date: */
  94
  95 struct headers {
  96     char *value;
  97     unsigned int flags;
  98     unsigned int set;
  99 };
 100
 101
 102 static struct headers NHeaders[] = {
 103     { "Return-Path", HBAD,                0 },
 104     { "Received",    HBAD,                0 },
 105     { "Reply-To",    HADR|HNGR,           0 },
 106     { "From",        HADR|HNGR,           MFRM },
 107     { "Sender",      HADR|HBAD,           0 },
 108     { "Date",        HNOP,                MDAT },
 109     { "Subject",     HSUB,                0 },
 110     { "To",          HADR|HTRY,           MVIS },
 111     { "cc",          HADR|HTRY,           MVIS },
 112     { "Bcc",         HADR|HTRY|HBCC|HNIL, MINV },
 113     { "Message-Id",  HBAD,                0 },
 114     { "Fcc",         HFCC,                0 },
 115     { "Envelope-From",HIGN,               0 },
 116     { NULL,          0,                   0 }
 117 };
 118
 119 static struct headers RHeaders[] = {
 120     { "Resent-Reply-To",   HADR|HNGR,      0 },
 121     { "Resent-From",       HADR|HNGR,      MRFM },
 122     { "Resent-Sender",     HADR|HBAD,      0 },
 123     { "Resent-Date",       HNOP,           MRDT },
 124     { "Resent-Subject",    HSUB,           0 },
 125     { "Resent-To",         HADR|HTRY,      MVIS },
 126     { "Resent-cc",         HADR|HTRY,      MVIS },
 127     { "Resent-Bcc",        HADR|HTRY|HBCC, MINV },
 128     { "Resent-Message-Id", HBAD,           0 },
 129     { "Resent-Fcc",        HFCC,           0 },
 130     { "Reply-To",          HADR,           0 },
 131     { "Fcc",               HIGN,           0 },
 132     { "Envelope-From",     HIGN,           0 },
 133     { NULL,                0,              0 }
 134 };
 135
 136
 137 static short fccind = 0;        /* index into fccfold[] */
 138
 139 static int badmsg = 0;          /* message has bad semantics            */
 140 static int verbose = 0;         /* spell it out                         */
 141 static int debug = 0;           /* debugging post                       */
 142 static int rmflg = 1;           /* remove temporary file when done      */
 143 static int watch = 0;           /* watch the delivery process           */
 144 static int backflg = 0;         /* rename input file as *.bak when done */
 145 static int whomflg = 0;         /* if just checking addresses           */
 146 static int pushflg = 0;         /* if going to fork to sendmail         */
 147 static int aliasflg = -1;       /* if going to process aliases          */
 148 static int outputlinelen=72;
 149
 150 static unsigned msgflags = 0;   /* what we've seen */
 151
 152 static enum {
 153     normal, resent
 154 } msgstate = normal;
 155
 156 static char tmpfil[] = "/tmp/pstXXXXXX";
 157
 158 static char from[BUFSIZ];       /* my network address */
 159 static char signature[BUFSIZ];  /* my signature */
 160 static char *filter = NULL;     /* the filter for BCC'ing */
 161 static char *subject = NULL;    /* the subject field for BCC'ing */
 162 static char *fccfold[FCCS];     /* foldernames for FCC'ing */
 163
 164 static struct headers *hdrtab;  /* table for the message we're doing */
 165 static FILE *out;               /* output (temp) file */
 166
 167 extern char *sendmail;
 168
 169 /*
 170  * external prototypes
 171  */
 172 extern char *getfullname (void);
 173 extern char *getusername (void);
 174
 175 /*
 176  * static prototypes
 177  */
 178 static void putfmt (char *, char *, FILE *);
 179 static void start_headers (void);
 180 static void finish_headers (FILE *);
 181 static int get_header (char *, struct headers *);
 182 static void putadr (char *, struct mailname *);
 183 static int putone (char *, int, int);
 184 static void insert_fcc (struct headers *, unsigned char *);
 185 static void file (char *);
 186 static void fcc (char *, char *);
 187
 188 #if 0
 189 static void die (char *, char *, ...);
 190 static void make_bcc_file (void);
 191 #endif
 192
 193
 194 int
 195 main (int argc, char **argv)
 196 {
 197     int state, i, pid, compnum;
 198     char *cp, *msg = NULL, **argp, **arguments;
 199     char *sargv[16], buf[BUFSIZ], name[NAMESZ];
 200     FILE *in;
 201
 202 #ifdef LOCALE
 203     setlocale(LC_ALL, "");
 204 #endif
 205     invo_name = r1bindex (argv[0], '/');
 206
 207     /* foil search of user profile/context */
 208     if (context_foil (NULL) == -1)
 209         done (1);
 210
 211     mts_init (invo_name);
 212     arguments = getarguments (invo_name, argc, argv, 0);
 213     argp = arguments;
 214
 215     while ((cp = *argp++)) {
 216         if (*cp == '-') {
 217             switch (smatch (++cp, switches)) {
 218                 case AMBIGSW:
 219                     ambigsw (cp, switches);
 220                     done (1);
 221                 case UNKWNSW:
 222                     adios (NULL, "-%s unknown", cp);
 223
 224                 case HELPSW:
 225                     snprintf (buf, sizeof(buf), "%s [switches] file", invo_name);
 226                     print_help (buf, switches, 1);
 227                     done (1);
 228                 case VERSIONSW:
 229                     print_version(invo_name);
 230                     done (1);
 231
 232                 case DEBUGSW:
 233                     debug++;
 234                     continue;
 235
 236                 case DISTSW:
 237                     msgstate = resent;
 238                     continue;
 239
 240                 case WHOMSW:
 241                     whomflg++;
 242                     continue;
 243
 244                 case FILTSW:
 245                     if (!(filter = *argp++) || *filter == '-')
 246                         adios (NULL, "missing argument to %s", argp[-2]);
 247                     continue;
 248                 case NFILTSW:
 249                     filter = NULL;
 250                     continue;
 251
 252                 case REMVSW:
 253                     rmflg++;
 254                     continue;
 255                 case NREMVSW:
 256                     rmflg = 0;
 257                     continue;
 258
 259                 case BACKSW:
 260                     backflg++;
 261                     continue;
 262                 case NBACKSW:
 263                     backflg = 0;
 264                     continue;
 265
 266                 case VERBSW:
 267                     verbose++;
 268                     continue;
 269                 case NVERBSW:
 270                     verbose = 0;
 271                     continue;
 272
 273                 case WATCSW:
 274                     watch++;
 275                     continue;
 276                 case NWATCSW:
 277                     watch = 0;
 278                     continue;
 279
 280                 case PUSHSW:
 281                     pushflg++;
 282                     continue;
 283                 case NPUSHSW:
 284                     pushflg = 0;
 285                     continue;
 286
 287                 case ALIASW:
 288                     if (!(cp = *argp++) || *cp == '-')
 289                         adios (NULL, "missing argument to %s", argp[-2]);
 290                     if (aliasflg < 0)
 291                         alias (AliasFile);/* load default aka's */
 292                     aliasflg = 1;
 293                     if ((state = alias(cp)) != AK_OK)
 294                         adios (NULL, "aliasing error in file %s - %s",
 295                                cp, akerror(state) );
 296                     continue;
 297                 case NALIASW:
 298                     aliasflg = 0;
 299                     continue;
 300
 301                 case WIDTHSW:
 302                     if (!(cp = *argp++) || *cp == '-')
 303                         adios (NULL, "missing argument to %s", argp[-2]);
 304                     outputlinelen = atoi (cp);
 305                     if (outputlinelen <= 10)
 306                         outputlinelen = 72;
 307                     continue;
 308
 309                 case LIBSW:
 310                     if (!(cp = *argp++) || *cp == '-')
 311                         adios (NULL, "missing argument to %s", argp[-2]);
 312                     /* create a minimal context */
 313                     if (context_foil (cp) == -1)
 314                         done(1);
 315                     continue;
 316
 317                 case ANNOSW:
 318                     /* -idanno switch ignored */
 319                     if (!(cp = *argp++) || *cp == '-')
 320                         adios (NULL, "missing argument to %s", argp[-2]);
 321                     continue;
 322             }
 323         }
 324         if (msg)
 325             adios (NULL, "only one message at a time!");
 326         else
 327             msg = cp;
 328     }
 329
 330     if (aliasflg < 0)
 331         alias (AliasFile);      /* load default aka's */
 332
 333     if (!msg)
 334         adios (NULL, "usage: %s [switches] file", invo_name);
 335
 336     if ((in = fopen (msg, "r")) == NULL)
 337         adios (msg, "unable to open");
 338
 339     start_headers ();
 340     if (debug) {
 341         verbose++;
 342         out = stdout;
 343     }
 344     else {
 345             if ((out = fdopen( mkstemp (tmpfil), "w" )) == NULL )
 346                 adios (tmpfil, "unable to create");
 347         }
 348
 349     hdrtab = (msgstate == normal) ? NHeaders : RHeaders;
 350
 351     for (compnum = 1, state = FLD;;) {
 352         switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
 353             case FLD:
 354                 compnum++;
 355                 putfmt (name, buf, out);
 356                 continue;
 357
 358             case FLDPLUS:
 359                 compnum++;
 360                 cp = add (buf, cp);
 361                 while (state == FLDPLUS) {
 362                     state = m_getfld (state, name, buf, sizeof(buf), in);
 363                     cp = add (buf, cp);
 364                 }
 365                 putfmt (name, cp, out);
 366                 free (cp);
 367                 continue;
 368
 369             case BODY:
 370                 finish_headers (out);
 371                 fprintf (out, "\n%s", buf);
 372                 if(whomflg == 0)
 373                     while (state == BODY) {
 374                         state = m_getfld (state, name, buf, sizeof(buf), in);
 375                         fputs (buf, out);
 376                     }
 377                 break;
 378
 379             case FILEEOF:
 380                 finish_headers (out);
 381                 break;
 382
 383             case LENERR:
 384             case FMTERR:
 385                 adios (NULL, "message format error in component #%d",
 386                         compnum);
 387
 388             default:
 389                 adios (NULL, "getfld() returned %d", state);
 390         }
 391         break;
 392     }
 393
 394     fclose (in);
 395     if (backflg && !whomflg) {
 396         strncpy (buf, m_backup (msg), sizeof(buf));
 397         if (rename (msg, buf) == NOTOK)
 398             advise (buf, "unable to rename %s to", msg);
 399     }
 400
 401     if (debug) {
 402         done (0);
 403     }
 404     else
 405         fclose (out);
 406
 407     file (tmpfil);
 408
 409     /*
 410      * re-open the temp file, unlink it and exec sendmail, giving it
 411      * the msg temp file as std in.
 412      */
 413     if ( freopen( tmpfil, "r", stdin) == NULL)
 414         adios (tmpfil, "can't reopen for sendmail");
 415     if (rmflg)
 416         unlink (tmpfil);
 417
 418     argp = sargv;
 419     *argp++ = "send-mail";
 420     *argp++ = "-m";     /* send to me too */
 421     *argp++ = "-t";     /* read msg for recipients */
 422     *argp++ = "-i";     /* don't stop on "." */
 423     if (whomflg)
 424         *argp++ = "-bv";
 425     if (watch || verbose)
 426         *argp++ = "-v";
 427     *argp = NULL;
 428
 429     if (pushflg && !(watch || verbose)) {
 430         /* fork to a child to run sendmail */
 431         for (i=0; (pid = vfork()) == NOTOK && i < 5; i++)
 432             sleep(5);
 433         switch (pid) {
 434             case NOTOK:
 435                 fprintf (verbose ? stdout : stderr, "%s: can't fork to %s\n",
 436                          invo_name, sendmail);
 437                 exit(-1);
 438             case OK:
 439                 /* we're the child .. */
 440                 break;
 441             default:
 442                 exit(0);
 443         }
 444     }
 445     execv ( sendmail, sargv);
 446     adios ( sendmail, "can't exec");
 447     return 0;  /* dead code to satisfy the compiler */
 448 }
 449
 450 /* DRAFT GENERATION */
 451
 452 static void
 453 putfmt (char *name, char *str, FILE *out)
 454 {
 455     int i;
 456     char *cp, *pp;
 457     struct headers *hdr;
 458
 459     while (*str == ' ' || *str == '\t')
 460         str++;
 461
 462     if ((i = get_header (name, hdrtab)) == NOTOK) {
 463         fprintf (out, "%s: %s", name, str);
 464         return;
 465     }
 466
 467     hdr = &hdrtab[i];
 468     if (hdr->flags & HIGN)
 469         return;
 470     if (hdr->flags & HBAD) {
 471         advise (NULL, "illegal header line -- %s:", name);
 472         badmsg++;
 473         return;
 474     }
 475     msgflags |= hdr->set;
 476
 477     if (hdr->flags & HSUB)
 478         subject = subject ? add (str, add ("\t", subject)) : getcpy (str);
 479
 480     if (hdr->flags & HFCC) {
 481         if ((cp = strrchr(str, '\n')))
 482             *cp = 0;
 483         for (cp = pp = str; (cp = strchr(pp, ',')); pp = cp) {
 484             *cp++ = 0;
 485             insert_fcc (hdr, pp);
 486         }
 487         insert_fcc (hdr, pp);
 488         return;
 489     }
 490
 491 #ifdef notdef
 492     if (hdr->flags & HBCC) {
 493         insert_bcc(str);
 494         return;
 495     }
 496 #endif  /* notdef */
 497
 498     if (*str != '\n' && *str != '\0') {
 499         if (aliasflg && hdr->flags & HTRY) {
 500             /* this header contains address(es) that we have to do
 501              * alias expansion on.  Because of the saved state in
 502              * getname we have to put all the addresses into a list.
 503              * We then let putadr munch on that list, possibly
 504              * expanding aliases.
 505              */
 506             register struct mailname *f = 0;
 507             register struct mailname *mp = 0;
 508
 509             while ((cp = getname(str))) {
 510                 mp = getm( cp, NULL, 0, AD_HOST, NULL);
 511                 if (f == 0) {
 512                     f = mp;
 513                     mp->m_next = mp;
 514                 } else {
 515                     mp->m_next = f->m_next;
 516                     f->m_next = mp;
 517                     f = mp;
 518                 }
 519             }
 520             f = mp->m_next; mp->m_next = 0;
 521             putadr( name, f );
 522         } else {
 523             /* The author(s) of spost decided that alias substitution wasn't
 524                necessary for the non-HTRY headers.  Unfortunately, one of those
 525                headers is "From:", and having alias substitution work on that is
 526                extremely useful for someone with a lot of POP3 email accounts or
 527                aliases.  post supports aliasing of "From:"...
 528
 529                Since "From:"-processing is incompletely implemented in this
 530                unsupported and undocumented spost backend, I'm not going to take
 531                the time to implement my new draft-From:-based email address
 532                masquerading.  If I do ever implement it here, I'd almost
 533                certainly want to implement "From:" line alias processing as
 534                well.  -- Dan Harkless <dan-nmh@dilvish.speed.net> */
 535             fprintf (out, "%s: %s", name, str );
 536         }
 537     }
 538 }
 539
 540
 541 static void
 542 start_headers (void)
 543 {
 544     char *cp;
 545     char sigbuf[BUFSIZ];
 546
 547     strncpy(from, getusername(), sizeof(from));
 548
 549     if ((cp = getfullname ()) && *cp) {
 550         strncpy (sigbuf, cp, sizeof(sigbuf));
 551         snprintf (signature, sizeof(signature), "%s <%s>", sigbuf,  from);
 552     }
 553     else
 554         snprintf (signature, sizeof(signature), "%s",  from);
 555 }
 556
 557
 558 static void
 559 finish_headers (FILE *out)
 560 {
 561     switch (msgstate) {
 562         case normal:
 563             if (!(msgflags & MDAT))
 564                 fprintf (out, "Date: %s\n", dtimenow (0));
 565
 566             if (!(msgflags & MFRM))
 567                 fprintf (out, "From: %s\n", signature);
 568
 569 #ifdef notdef
 570             if (!(msgflags & MVIS))
 571                 fprintf (out, "Bcc: Blind Distribution List: ;\n");
 572 #endif  /* notdef */
 573             break;
 574
 575         case resent:
 576             if (!(msgflags & MRDT))
 577                 fprintf (out, "Resent-Date: %s\n", dtimenow(0));
 578             if (!(msgflags & MRFM))
 579                 /* Construct a Resent-From: header. */
 580                 fprintf (out, "Resent-From: %s\n", signature);
 581 #ifdef notdef
 582             if (!(msgflags & MVIS))
 583                 fprintf (out, "Resent-Bcc: Blind Re-Distribution List: ;\n");
 584 #endif  /* notdef */
 585             break;
 586     }
 587
 588     if (badmsg)
 589         adios (NULL, "re-format message and try again");
 590 }
 591
 592
 593 static int
 594 get_header (char *header, struct headers *table)
 595 {
 596     struct headers *h;
 597
 598     for (h = table; h->value; h++)
 599         if (!mh_strcasecmp (header, h->value))
 600             return (h - table);
 601
 602     return NOTOK;
 603 }
 604
 605
 606 /*
 607  * output the address list for header "name".  The address list
 608  * is a linked list of mailname structs.  "nl" points to the head
 609  * of the list.  Alias substitution should be done on nl.
 610  */
 611 static void
 612 putadr (char *name, struct mailname *nl)
 613 {
 614     register struct mailname *mp, *mp2;
 615     register int linepos;
 616     register char *cp;
 617     int namelen;
 618
 619     fprintf (out, "%s: ", name);
 620     namelen = strlen(name) + 2;
 621     linepos = namelen;
 622
 623     for (mp = nl; mp; ) {
 624         if (linepos > MAX_SM_FIELD) {
 625                 fprintf (out, "\n%s: ", name);
 626                 linepos = namelen;
 627         }
 628         if (mp->m_nohost) {
 629             /* a local name - see if it's an alias */
 630             cp = akvalue(mp->m_mbox);
 631             if (cp == mp->m_mbox)
 632                 /* wasn't an alias - use what the user typed */
 633                 linepos = putone( mp->m_text, linepos, namelen );
 634             else
 635                 /* an alias - expand it */
 636                 while ((cp = getname(cp))) {
 637                     if (linepos > MAX_SM_FIELD) {
 638                             fprintf (out, "\n%s: ", name);
 639                             linepos = namelen;
 640                     }
 641                     mp2 = getm( cp, NULL, 0, AD_HOST, NULL);
 642                     if (akvisible()) {
 643                         mp2->m_pers = getcpy(mp->m_mbox);
 644                         linepos = putone( adrformat(mp2), linepos, namelen );
 645                     } else {
 646                         linepos = putone( mp2->m_text, linepos, namelen );
 647                     }
 648                     mnfree( mp2 );
 649                 }
 650         } else {
 651             /* not a local name - use what the user typed */
 652             linepos = putone( mp->m_text, linepos, namelen );
 653         }
 654         mp2 = mp;
 655         mp = mp->m_next;
 656         mnfree( mp2 );
 657     }
 658     putc( '\n', out );
 659 }
 660
 661 static int
 662 putone (char *adr, int pos, int indent)
 663 {
 664     register int len;
 665     static int linepos;
 666
 667     len = strlen( adr );
 668     if (pos == indent)
 669         linepos = pos;
 670     else if ( linepos+len > outputlinelen ) {
 671         fprintf ( out, ",\n%*s", indent, "");
 672         linepos = indent;
 673         pos += indent + 2;
 674     }
 675     else {
 676         fputs( ", ", out );
 677         linepos += 2;
 678         pos += 2;
 679     }
 680     fputs( adr, out );
 681
 682     linepos += len;
 683     return (pos+len);
 684 }
 685
 686
 687 static void
 688 insert_fcc (struct headers *hdr, unsigned char *pp)
 689 {
 690     unsigned char   *cp;
 691
 692     for (cp = pp; isspace (*cp); cp++)
 693         continue;
 694     for (pp += strlen (pp) - 1; pp > cp && isspace (*pp); pp--)
 695         continue;
 696     if (pp >= cp)
 697         *++pp = 0;
 698     if (*cp == 0)
 699         return;
 700
 701     if (fccind >= FCCS)
 702         adios (NULL, "too many %ss", hdr->value);
 703     fccfold[fccind++] = getcpy (cp);
 704 }
 705
 706 #if 0
 707 /* BCC GENERATION */
 708
 709 static void
 710 make_bcc_file (void)
 711 {
 712     pid_t child_id;
 713     int fd, i, status;
 714     char *vec[6];
 715     FILE * in, *out;
 716
 717     fd = mkstemp(bccfil);
 718     if (fd == -1 || (out = fdopen(fd, "w")) == NULL)
 719         adios (bccfil, "unable to create");
 720     chmod (bccfil, 0600);
 721
 722     fprintf (out, "Date: %s\n", dtimenow (0));
 723     if (!(msgflags & MFRM))
 724       /* Construct a From: header. */
 725       fprintf (out, "From: %s\n", signature);
 726     if (subject)
 727         fprintf (out, "Subject: %s", subject);
 728     fprintf (out, "BCC:\n\n------- Blind-Carbon-Copy\n\n");
 729     fflush (out);
 730
 731     if (filter == NULL) {
 732         if ((fd = open (tmpfil, O_RDONLY)) == NOTOK)
 733             adios (NULL, "unable to re-open");
 734         cpydgst (fd, fileno (out), tmpfil, bccfil);
 735         close (fd);
 736     }
 737     else {
 738         vec[0] = r1bindex (mhlproc, '/');
 739
 740         for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
 741             sleep (5);
 742         switch (child_id) {
 743             case NOTOK:
 744                 adios ("vfork", "unable to");
 745
 746             case OK:
 747                 dup2 (fileno (out), 1);
 748
 749                 i = 1;
 750                 vec[i++] = "-forward";
 751                 vec[i++] = "-form";
 752                 vec[i++] = filter;
 753                 vec[i++] = tmpfil;
 754                 vec[i] = NULL;
 755
 756                 execvp (mhlproc, vec);
 757                 adios (mhlproc, "unable to exec");
 758
 759             default:
 760                 if (status = pidwait(child_id, OK))
 761                     admonish (NULL, "%s lost (status=0%o)", vec[0], status);
 762                 break;
 763         }
 764     }
 765
 766     fseek (out, 0L, SEEK_END);
 767     fprintf (out, "\n------- End of Blind-Carbon-Copy\n");
 768     fclose (out);
 769 }
 770 #endif  /* if 0 */
 771
 772 /* FCC INTERACTION */
 773
 774 static void
 775 file (char *path)
 776 {
 777     int i;
 778
 779     if (fccind == 0)
 780         return;
 781
 782     for (i = 0; i < fccind; i++)
 783         if (whomflg)
 784             printf ("Fcc: %s\n", fccfold[i]);
 785         else
 786             fcc (path, fccfold[i]);
 787 }
 788
 789
 790 static void
 791 fcc (char *file, char *folder)
 792 {
 793     pid_t child_id;
 794     int i, status;
 795     char fold[BUFSIZ];
 796
 797     if (verbose)
 798         printf ("%sFcc: %s\n", msgstate == resent ? "Resent-" : "", folder);
 799     fflush (stdout);
 800
 801     for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
 802         sleep (5);
 803     switch (child_id) {
 804         case NOTOK:
 805             if (!verbose)
 806                 fprintf (stderr, "  %sFcc %s: ",
 807                         msgstate == resent ? "Resent-" : "", folder);
 808             fprintf (verbose ? stdout : stderr, "no forks, so not ok\n");
 809             break;
 810
 811         case OK:
 812             snprintf (fold, sizeof(fold), "%s%s",
 813                     *folder == '+' || *folder == '@' ? "" : "+", folder);
 814             execlp (fileproc, r1bindex (fileproc, '/'),
 815                     "-link", "-file", file, fold, NULL);
 816             _exit (-1);
 817
 818         default:
 819             if ((status = pidwait(child_id, OK))) {
 820                 if (!verbose)
 821                     fprintf (stderr, "  %sFcc %s: ",
 822                             msgstate == resent ? "Resent-" : "", folder);
 823                 fprintf (verbose ? stdout : stderr,
 824                         " errored (0%o)\n", status);
 825             }
 826     }
 827
 828     fflush (stdout);
 829 }
 830
 831
 832 #if 0
 833
 834 /*
 835  * TERMINATION
 836  */
 837
 838 static void
 839 die (char *what, char *fmt, ...)
 840 {
 841     va_list ap;
 842
 843     va_start(ap, fmt);
 844     advertise (what, NULL, fmt, ap);
 845     va_end(ap);
 846
 847     done (1);
 848 }
 849 #endif