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