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  * This code is Copyright (c) 2002, by the authors of nmh.  See the
  11  * COPYRIGHT file in the root directory of the nmh distribution for
  12  * complete copyright information.
  13  */
  14
  15 #include <h/mh.h>
  16 #include <signal.h>
  17 #include <h/addrsbr.h>
  18 #include <h/aliasbr.h>
  19 #include <h/dropsbr.h>
  20 #include <h/tws.h>
  21 #include <h/mts.h>
  22
  23 #define uptolow(c)      ((isalpha(c) && isupper (c)) ? tolower (c) : c)
  24
  25 #define MAX_SM_FIELD    1476    /* < largest hdr field sendmail will accept */
  26 #define FCCS            10      /* max number of fccs allowed */
  27
  28 struct swit switches[] = {
  29 #define FILTSW               0
  30     { "filter filterfile", 0 },
  31 #define NFILTSW              1
  32     { "nofilter", 0 },
  33 #define FRMTSW               2
  34     { "format", 0 },
  35 #define NFRMTSW              3
  36     { "noformat", 0 },
  37 #define REMVSW               4
  38     { "remove", 0 },
  39 #define NREMVSW              5
  40     { "noremove", 0 },
  41 #define VERBSW               6
  42     { "verbose", 0 },
  43 #define NVERBSW              7
  44     { "noverbose", 0 },
  45 #define WATCSW               8
  46     { "watch", 0 },
  47 #define NWATCSW              9
  48     { "nowatch", 0 },
  49 #define BACKSW              10
  50     { "backup", 0 },
  51 #define NBACKSW             11
  52     { "nobackup", 0 },
  53 #define ALIASW              12
  54     { "alias aliasfile", 0 },
  55 #define NALIASW             13
  56     { "noalias", 0 },
  57 #define WIDTHSW             14
  58     { "width columns", 0 },
  59 #define VERSIONSW           15
  60     { "version", 0 },
  61 #define HELPSW              16
  62     { "help", 0 },
  63 #define DEBUGSW             17
  64     { "debug", -5 },
  65 #define DISTSW              18
  66     { "dist", -4 },             /* interface from dist */
  67 #define CHKSW               19
  68     { "check", -5 },            /* interface from whom */
  69 #define NCHKSW              20
  70     { "nocheck", -7 },          /* interface from whom */
  71 #define WHOMSW              21
  72     { "whom", -4 },             /* interface from whom */
  73 #define PUSHSW              22  /* fork to sendmail then exit */
  74     { "push", -4 },
  75 #define NPUSHSW             23  /* exec sendmail */
  76     { "nopush", -6 },
  77 #define LIBSW               24
  78     { "library directory", -7 },
  79 #define ANNOSW              25
  80     { "idanno number", -6 },
  81     { NULL, 0 }
  82 };
  83
  84
  85 /* flags for headers->flags */
  86 #define HNOP    0x0000          /* just used to keep .set around */
  87 #define HBAD    0x0001          /* bad header - don't let it through */
  88 #define HADR    0x0002          /* header has an address field */
  89 #define HSUB    0x0004          /* Subject: header */
  90 #define HTRY    0x0008          /* try to send to addrs on header */
  91 #define HBCC    0x0010          /* don't output this header */
  92 #define HMNG    0x0020          /* mung this header */
  93 #define HNGR    0x0040          /* no groups allowed in this header */
  94 #define HFCC    0x0080          /* FCC: type header */
  95 #define HNIL    0x0100          /* okay for this header not to have addrs */
  96 #define HIGN    0x0200          /* ignore this header */
  97
  98 /* flags for headers->set */
  99 #define MFRM    0x0001          /* we've seen a From: */
 100 #define MDAT    0x0002          /* we've seen a Date: */
 101 #define MRFM    0x0004          /* we've seen a Resent-From: */
 102 #define MVIS    0x0008          /* we've seen sighted addrs */
 103 #define MINV    0x0010          /* we've seen blind addrs */
 104 #define MRDT    0x0020          /* we've seen a Resent-Date: */
 105
 106 struct headers {
 107     char *value;
 108     unsigned int flags;
 109     unsigned int set;
 110 };
 111
 112
 113 static struct headers NHeaders[] = {
 114     { "Return-Path", HBAD,                0 },
 115     { "Received",    HBAD,                0 },
 116     { "Reply-To",    HADR|HNGR,           0 },
 117     { "From",        HADR|HNGR,           MFRM },
 118     { "Sender",      HADR|HBAD,           0 },
 119     { "Date",        HNOP,                MDAT },
 120     { "Subject",     HSUB,                0 },
 121     { "To",          HADR|HTRY,           MVIS },
 122     { "cc",          HADR|HTRY,           MVIS },
 123     { "Bcc",         HADR|HTRY|HBCC|HNIL, MINV },
 124     { "Message-Id",  HBAD,                0 },
 125     { "Fcc",         HFCC,                0 },
 126     { NULL,          0,                   0 }
 127 };
 128
 129 static struct headers RHeaders[] = {
 130     { "Resent-Reply-To",   HADR|HNGR,      0 },
 131     { "Resent-From",       HADR|HNGR,      MRFM },
 132     { "Resent-Sender",     HADR|HBAD,      0 },
 133     { "Resent-Date",       HNOP,           MRDT },
 134     { "Resent-Subject",    HSUB,           0 },
 135     { "Resent-To",         HADR|HTRY,      MVIS },
 136     { "Resent-cc",         HADR|HTRY,      MVIS },
 137     { "Resent-Bcc",        HADR|HTRY|HBCC, MINV },
 138     { "Resent-Message-Id", HBAD,           0 },
 139     { "Resent-Fcc",        HFCC,           0 },
 140     { "Reply-To",          HADR,           0 },
 141     { "Fcc",               HIGN,           0 },
 142     { NULL,                0,              0 }
 143 };
 144
 145
 146 static short fccind = 0;        /* index into fccfold[] */
 147
 148 static int badmsg = 0;          /* message has bad semantics            */
 149 static int verbose = 0;         /* spell it out                         */
 150 static int debug = 0;           /* debugging post                       */
 151 static int rmflg = 1;           /* remove temporary file when done      */
 152 static int watch = 0;           /* watch the delivery process           */
 153 static int backflg = 0;         /* rename input file as *.bak when done */
 154 static int whomflg = 0;         /* if just checking addresses           */
 155 static int pushflg = 0;         /* if going to fork to sendmail         */
 156 static int aliasflg = -1;       /* if going to process aliases          */
 157 static int outputlinelen=72;
 158
 159 static unsigned msgflags = 0;   /* what we've seen */
 160
 161 static enum {
 162     normal, resent
 163 } msgstate = normal;
 164
 165 static char tmpfil[] = "/tmp/pstXXXXXX";
 166
 167 static char from[BUFSIZ];       /* my network address */
 168 static char signature[BUFSIZ];  /* my signature */
 169 static char *filter = NULL;     /* the filter for BCC'ing */
 170 static char *subject = NULL;    /* the subject field for BCC'ing */
 171 static char *fccfold[FCCS];     /* foldernames for FCC'ing */
 172
 173 static struct headers *hdrtab;  /* table for the message we're doing */
 174 static FILE *out;               /* output (temp) file */
 175
 176 extern char *sendmail;
 177
 178 /*
 179  * external prototypes
 180  */
 181 extern char *getfullname (void);
 182 extern char *getusername (void);
 183
 184 /*
 185  * static prototypes
 186  */
 187 static void putfmt (char *, char *, FILE *);
 188 static void start_headers (void);
 189 static void finish_headers (FILE *);
 190 static int get_header (char *, struct headers *);
 191 static void putadr (char *, struct mailname *);
 192 static int putone (char *, int, int);
 193 static void insert_fcc (struct headers *, char *);
 194 static void file (char *);
 195 static void fcc (char *, char *);
 196
 197 #if 0
 198 static void die (char *, char *, ...);
 199 static void make_bcc_file (void);
 200 #endif
 201
 202
 203 int
 204 main (int argc, char **argv)
 205 {
 206     int state, i, pid, compnum;
 207     char *cp, *msg = NULL, **argp, **arguments;
 208     char *sargv[16], buf[BUFSIZ], name[NAMESZ];
 209     FILE *in;
 210
 211 #ifdef LOCALE
 212     setlocale(LC_ALL, "");
 213 #endif
 214     invo_name = r1bindex (argv[0], '/');
 215
 216     /* foil search of user profile/context */
 217     if (context_foil (NULL) == -1)
 218         done (1);
 219
 220     mts_init (invo_name);
 221     arguments = getarguments (invo_name, argc, argv, 0);
 222     argp = arguments;
 223
 224     while ((cp = *argp++)) {
 225         if (*cp == '-') {
 226             switch (smatch (++cp, switches)) {
 227                 case AMBIGSW:
 228                     ambigsw (cp, switches);
 229                     done (1);
 230                 case UNKWNSW:
 231                     adios (NULL, "-%s unknown", cp);
 232
 233                 case HELPSW:
 234                     snprintf (buf, sizeof(buf), "%s [switches] file", invo_name);
 235                     print_help (buf, switches, 1);
 236                     done (1);
 237                 case VERSIONSW:
 238                     print_version(invo_name);
 239                     done (1);
 240
 241                 case DEBUGSW:
 242                     debug++;
 243                     continue;
 244
 245                 case DISTSW:
 246                     msgstate = resent;
 247                     continue;
 248
 249                 case WHOMSW:
 250                     whomflg++;
 251                     continue;
 252
 253                 case FILTSW:
 254                     if (!(filter = *argp++) || *filter == '-')
 255                         adios (NULL, "missing argument to %s", argp[-2]);
 256                     continue;
 257                 case NFILTSW:
 258                     filter = NULL;
 259                     continue;
 260
 261                 case REMVSW:
 262                     rmflg++;
 263                     continue;
 264                 case NREMVSW:
 265                     rmflg = 0;
 266                     continue;
 267
 268                 case BACKSW:
 269                     backflg++;
 270                     continue;
 271                 case NBACKSW:
 272                     backflg = 0;
 273                     continue;
 274
 275                 case VERBSW:
 276                     verbose++;
 277                     continue;
 278                 case NVERBSW:
 279                     verbose = 0;
 280                     continue;
 281
 282                 case WATCSW:
 283                     watch++;
 284                     continue;
 285                 case NWATCSW:
 286                     watch = 0;
 287                     continue;
 288
 289                 case PUSHSW:
 290                     pushflg++;
 291                     continue;
 292                 case NPUSHSW:
 293                     pushflg = 0;
 294                     continue;
 295
 296                 case ALIASW:
 297                     if (!(cp = *argp++) || *cp == '-')
 298                         adios (NULL, "missing argument to %s", argp[-2]);
 299                     if (aliasflg < 0)
 300                         alias (AliasFile);/* load default aka's */
 301                     aliasflg = 1;
 302                     if ((state = alias(cp)) != AK_OK)
 303                         adios (NULL, "aliasing error in file %s - %s",
 304                                cp, akerror(state) );
 305                     continue;
 306                 case NALIASW:
 307                     aliasflg = 0;
 308                     continue;
 309
 310                 case WIDTHSW:
 311                     if (!(cp = *argp++) || *cp == '-')
 312                         adios (NULL, "missing argument to %s", argp[-2]);
 313                     outputlinelen = atoi (cp);
 314                     if (outputlinelen <= 10)
 315                         outputlinelen = 72;
 316                     continue;
 317
 318                 case LIBSW:
 319                     if (!(cp = *argp++) || *cp == '-')
 320                         adios (NULL, "missing argument to %s", argp[-2]);
 321                     /* create a minimal context */
 322                     if (context_foil (cp) == -1)
 323                         done(1);
 324                     continue;
 325
 326                 case ANNOSW:
 327                     /* -idanno switch ignored */
 328                     if (!(cp = *argp++) || *cp == '-')
 329                         adios (NULL, "missing argument to %s", argp[-2]);
 330                     continue;
 331             }
 332         }
 333         if (msg)
 334             adios (NULL, "only one message at a time!");
 335         else
 336             msg = cp;
 337     }
 338
 339     if (aliasflg < 0)
 340         alias (AliasFile);      /* load default aka's */
 341
 342     if (!msg)
 343         adios (NULL, "usage: %s [switches] file", invo_name);
 344
 345     if ((in = fopen (msg, "r")) == NULL)
 346         adios (msg, "unable to open");
 347
 348     start_headers ();
 349     if (debug) {
 350         verbose++;
 351         out = stdout;
 352     }
 353     else {
 354 #ifdef HAVE_MKSTEMP
 355             if ((out = fdopen( mkstemp (tmpfil), "w" )) == NULL )
 356                 adios (tmpfil, "unable to create");
 357 #else
 358             mktemp (tmpfil);
 359             if ((out = fopen (tmpfil, "w")) == NULL)
 360                 adios (tmpfil, "unable to create");
 361             chmod (tmpfil, 0600);
 362 #endif
 363         }
 364
 365     hdrtab = (msgstate == normal) ? NHeaders : RHeaders;
 366
 367     for (compnum = 1, state = FLD;;) {
 368         switch (state = m_getfld (state, name, buf, sizeof(buf), in)) {
 369             case FLD:
 370                 compnum++;
 371                 putfmt (name, buf, out);
 372                 continue;
 373
 374             case FLDPLUS:
 375                 compnum++;
 376                 cp = add (buf, cp);
 377                 while (state == FLDPLUS) {
 378                     state = m_getfld (state, name, buf, sizeof(buf), in);
 379                     cp = add (buf, cp);
 380                 }
 381                 putfmt (name, cp, out);
 382                 free (cp);
 383                 continue;
 384
 385             case BODY:
 386                 finish_headers (out);
 387                 fprintf (out, "\n%s", buf);
 388                 if(whomflg == 0)
 389                     while (state == BODY) {
 390                         state = m_getfld (state, name, buf, sizeof(buf), in);
 391                         fputs (buf, out);
 392                     }
 393                 break;
 394
 395             case FILEEOF:
 396                 finish_headers (out);
 397                 break;
 398
 399             case LENERR:
 400             case FMTERR:
 401                 adios (NULL, "message format error in component #%d",
 402                         compnum);
 403
 404             default:
 405                 adios (NULL, "getfld() returned %d", state);
 406         }
 407         break;
 408     }
 409
 410     fclose (in);
 411     if (backflg && !whomflg) {
 412         strncpy (buf, m_backup (msg), sizeof(buf));
 413         if (rename (msg, buf) == NOTOK)
 414             advise (buf, "unable to rename %s to", msg);
 415     }
 416
 417     if (debug) {
 418         done (0);
 419     }
 420     else
 421         fclose (out);
 422
 423     file (tmpfil);
 424
 425     /*
 426      * re-open the temp file, unlink it and exec sendmail, giving it
 427      * the msg temp file as std in.
 428      */
 429     if ( freopen( tmpfil, "r", stdin) == NULL)
 430         adios (tmpfil, "can't reopen for sendmail");
 431     if (rmflg)
 432         unlink (tmpfil);
 433
 434     argp = sargv;
 435     *argp++ = "send-mail";
 436     *argp++ = "-m";     /* send to me too */
 437     *argp++ = "-t";     /* read msg for recipients */
 438     *argp++ = "-i";     /* don't stop on "." */
 439     if (whomflg)
 440         *argp++ = "-bv";
 441     if (watch || verbose)
 442         *argp++ = "-v";
 443     *argp = NULL;
 444
 445     if (pushflg && !(watch || verbose)) {
 446         /* fork to a child to run sendmail */
 447         for (i=0; (pid = vfork()) == NOTOK && i < 5; i++)
 448             sleep(5);
 449         switch (pid) {
 450             case NOTOK:
 451                 fprintf (verbose ? stdout : stderr, "%s: can't fork to %s\n",
 452                          invo_name, sendmail);
 453                 exit(-1);
 454             case OK:
 455                 /* we're the child .. */
 456                 break;
 457             default:
 458                 exit(0);
 459         }
 460     }
 461     execv ( sendmail, sargv);
 462     adios ( sendmail, "can't exec");
 463     return 0;  /* dead code to satisfy the compiler */
 464 }
 465
 466 /* DRAFT GENERATION */
 467
 468 static void
 469 putfmt (char *name, char *str, FILE *out)
 470 {
 471     int i;
 472     char *cp, *pp;
 473     struct headers *hdr;
 474
 475     while (*str == ' ' || *str == '\t')
 476         str++;
 477
 478     if ((i = get_header (name, hdrtab)) == NOTOK) {
 479         fprintf (out, "%s: %s", name, str);
 480         return;
 481     }
 482
 483     hdr = &hdrtab[i];
 484     if (hdr->flags & HIGN)
 485         return;
 486     if (hdr->flags & HBAD) {
 487         advise (NULL, "illegal header line -- %s:", name);
 488         badmsg++;
 489         return;
 490     }
 491     msgflags |= hdr->set;
 492
 493     if (hdr->flags & HSUB)
 494         subject = subject ? add (str, add ("\t", subject)) : getcpy (str);
 495
 496     if (hdr->flags & HFCC) {
 497         if ((cp = strrchr(str, '\n')))
 498             *cp = 0;
 499         for (cp = pp = str; (cp = strchr(pp, ',')); pp = cp) {
 500             *cp++ = 0;
 501             insert_fcc (hdr, pp);
 502         }
 503         insert_fcc (hdr, pp);
 504         return;
 505     }
 506
 507 #ifdef notdef
 508     if (hdr->flags & HBCC) {
 509         insert_bcc(str);
 510         return;
 511     }
 512 #endif  /* notdef */
 513
 514     if (*str != '\n' && *str != '\0') {
 515         if (aliasflg && hdr->flags & HTRY) {
 516             /* this header contains address(es) that we have to do
 517              * alias expansion on.  Because of the saved state in
 518              * getname we have to put all the addresses into a list.
 519              * We then let putadr munch on that list, possibly
 520              * expanding aliases.
 521              */
 522             register struct mailname *f = 0;
 523             register struct mailname *mp = 0;
 524
 525             while ((cp = getname(str))) {
 526                 mp = getm( cp, NULL, 0, AD_HOST, NULL);
 527                 if (f == 0) {
 528                     f = mp;
 529                     mp->m_next = mp;
 530                 } else {
 531                     mp->m_next = f->m_next;
 532                     f->m_next = mp;
 533                     f = mp;
 534                 }
 535             }
 536             f = mp->m_next; mp->m_next = 0;
 537             putadr( name, f );
 538         } else {
 539             /* The author(s) of spost decided that alias substitution wasn't
 540                necessary for the non-HTRY headers.  Unfortunately, one of those
 541                headers is "From:", and having alias substitution work on that is
 542                extremely useful for someone with a lot of POP3 email accounts or
 543                aliases.  post supports aliasing of "From:"...
 544
 545                Since "From:"-processing is incompletely implemented in this
 546                unsupported and undocumented spost backend, I'm not going to take
 547                the time to implement my new draft-From:-based email address
 548                masquerading.  If I do ever implement it here, I'd almost
 549                certainly want to implement "From:" line alias processing as
 550                well.  -- Dan Harkless <dan-nmh@dilvish.speed.net> */
 551             fprintf (out, "%s: %s", name, str );
 552         }
 553     }
 554 }
 555
 556
 557 static void
 558 start_headers (void)
 559 {
 560     char *cp;
 561     char sigbuf[BUFSIZ];
 562
 563     strncpy(from, getusername(), sizeof(from));
 564
 565     if ((cp = getfullname ()) && *cp) {
 566         strncpy (sigbuf, cp, sizeof(sigbuf));
 567         snprintf (signature, sizeof(signature), "%s <%s>", sigbuf,  from);
 568     }
 569     else
 570         snprintf (signature, sizeof(signature), "%s",  from);
 571 }
 572
 573
 574 static void
 575 finish_headers (FILE *out)
 576 {
 577     switch (msgstate) {
 578         case normal:
 579             if (!(msgflags & MDAT))
 580                 fprintf (out, "Date: %s\n", dtimenow (0));
 581             if (msgflags & MFRM)
 582                 fprintf (out, "Sender: %s\n", from);
 583             else
 584                 fprintf (out, "From: %s\n", signature);
 585 #ifdef notdef
 586             if (!(msgflags & MVIS))
 587                 fprintf (out, "Bcc: Blind Distribution List: ;\n");
 588 #endif  /* notdef */
 589             break;
 590
 591         case resent:
 592             if (!(msgflags & MRDT))
 593                 fprintf (out, "Resent-Date: %s\n", dtimenow(0));
 594             if (msgflags & MRFM)
 595                 fprintf (out, "Resent-Sender: %s\n", from);
 596             else
 597                 fprintf (out, "Resent-From: %s\n", signature);
 598 #ifdef notdef
 599             if (!(msgflags & MVIS))
 600                 fprintf (out, "Resent-Bcc: Blind Re-Distribution List: ;\n");
 601 #endif  /* notdef */
 602             break;
 603     }
 604
 605     if (badmsg)
 606         adios (NULL, "re-format message and try again");
 607 }
 608
 609
 610 static int
 611 get_header (char *header, struct headers *table)
 612 {
 613     struct headers *h;
 614
 615     for (h = table; h->value; h++)
 616         if (!strcasecmp (header, h->value))
 617             return (h - table);
 618
 619     return NOTOK;
 620 }
 621
 622
 623 /*
 624  * output the address list for header "name".  The address list
 625  * is a linked list of mailname structs.  "nl" points to the head
 626  * of the list.  Alias substitution should be done on nl.
 627  */
 628 static void
 629 putadr (char *name, struct mailname *nl)
 630 {
 631     register struct mailname *mp, *mp2;
 632     register int linepos;
 633     register char *cp;
 634     int namelen;
 635
 636     fprintf (out, "%s: ", name);
 637     namelen = strlen(name) + 2;
 638     linepos = namelen;
 639
 640     for (mp = nl; mp; ) {
 641         if (linepos > MAX_SM_FIELD) {
 642                 fprintf (out, "\n%s: ", name);
 643                 linepos = namelen;
 644         }
 645         if (mp->m_nohost) {
 646             /* a local name - see if it's an alias */
 647             cp = akvalue(mp->m_mbox);
 648             if (cp == mp->m_mbox)
 649                 /* wasn't an alias - use what the user typed */
 650                 linepos = putone( mp->m_text, linepos, namelen );
 651             else
 652                 /* an alias - expand it */
 653                 while ((cp = getname(cp))) {
 654                     if (linepos > MAX_SM_FIELD) {
 655                             fprintf (out, "\n%s: ", name);
 656                             linepos = namelen;
 657                     }
 658                     mp2 = getm( cp, NULL, 0, AD_HOST, NULL);
 659                     if (akvisible()) {
 660                         mp2->m_pers = getcpy(mp->m_mbox);
 661                         linepos = putone( adrformat(mp2), linepos, namelen );
 662                     } else {
 663                         linepos = putone( mp2->m_text, linepos, namelen );
 664                     }
 665                     mnfree( mp2 );
 666                 }
 667         } else {
 668             /* not a local name - use what the user typed */
 669             linepos = putone( mp->m_text, linepos, namelen );
 670         }
 671         mp2 = mp;
 672         mp = mp->m_next;
 673         mnfree( mp2 );
 674     }
 675     putc( '\n', out );
 676 }
 677
 678 static int
 679 putone (char *adr, int pos, int indent)
 680 {
 681     register int len;
 682     static int linepos;
 683
 684     len = strlen( adr );
 685     if (pos == indent)
 686         linepos = pos;
 687     else if ( linepos+len > outputlinelen ) {
 688         fprintf ( out, ",\n%*s", indent, "");
 689         linepos = indent;
 690         pos += indent + 2;
 691     }
 692     else {
 693         fputs( ", ", out );
 694         linepos += 2;
 695         pos += 2;
 696     }
 697     fputs( adr, out );
 698
 699     linepos += len;
 700     return (pos+len);
 701 }
 702
 703
 704 static void
 705 insert_fcc (struct headers *hdr, char *pp)
 706 {
 707     char   *cp;
 708
 709     for (cp = pp; isspace (*cp); cp++)
 710         continue;
 711     for (pp += strlen (pp) - 1; pp > cp && isspace (*pp); pp--)
 712         continue;
 713     if (pp >= cp)
 714         *++pp = 0;
 715     if (*cp == 0)
 716         return;
 717
 718     if (fccind >= FCCS)
 719         adios (NULL, "too many %ss", hdr->value);
 720     fccfold[fccind++] = getcpy (cp);
 721 }
 722
 723 #if 0
 724 /* BCC GENERATION */
 725
 726 static void
 727 make_bcc_file (void)
 728 {
 729     pid_t child_id;
 730     int fd, i, status;
 731     char *vec[6];
 732     FILE * in, *out;
 733
 734 #ifdef HAVE_MKSTEMP
 735     fd = mkstemp(bccfil);
 736     if (fd == -1 || (out = fdopen(fd, "w")) == NULL)
 737         adios (bccfil, "unable to create");
 738 #else
 739     mktemp (bccfil);
 740     if ((out = fopen (bccfil, "w")) == NULL)
 741         adios (bccfil, "unable to create");
 742 #endif
 743     chmod (bccfil, 0600);
 744
 745     fprintf (out, "Date: %s\n", dtimenow (0));
 746     fprintf (out, "From: %s\n", signature);
 747     if (subject)
 748         fprintf (out, "Subject: %s", subject);
 749     fprintf (out, "BCC:\n\n------- Blind-Carbon-Copy\n\n");
 750     fflush (out);
 751
 752     if (filter == NULL) {
 753         if ((fd = open (tmpfil, O_RDONLY)) == NOTOK)
 754             adios (NULL, "unable to re-open");
 755         cpydgst (fd, fileno (out), tmpfil, bccfil);
 756         close (fd);
 757     }
 758     else {
 759         vec[0] = r1bindex (mhlproc, '/');
 760
 761         for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
 762             sleep (5);
 763         switch (child_id) {
 764             case NOTOK:
 765                 adios ("vfork", "unable to");
 766
 767             case OK:
 768                 dup2 (fileno (out), 1);
 769
 770                 i = 1;
 771                 vec[i++] = "-forward";
 772                 vec[i++] = "-form";
 773                 vec[i++] = filter;
 774                 vec[i++] = tmpfil;
 775                 vec[i] = NULL;
 776
 777                 execvp (mhlproc, vec);
 778                 adios (mhlproc, "unable to exec");
 779
 780             default:
 781                 if (status = pidwait(child_id, OK))
 782                     admonish (NULL, "%s lost (status=0%o)", vec[0], status);
 783                 break;
 784         }
 785     }
 786
 787     fseek (out, 0L, SEEK_END);
 788     fprintf (out, "\n------- End of Blind-Carbon-Copy\n");
 789     fclose (out);
 790 }
 791 #endif  /* if 0 */
 792
 793 /* FCC INTERACTION */
 794
 795 static void
 796 file (char *path)
 797 {
 798     int i;
 799
 800     if (fccind == 0)
 801         return;
 802
 803     for (i = 0; i < fccind; i++)
 804         if (whomflg)
 805             printf ("Fcc: %s\n", fccfold[i]);
 806         else
 807             fcc (path, fccfold[i]);
 808 }
 809
 810
 811 static void
 812 fcc (char *file, char *folder)
 813 {
 814     pid_t child_id;
 815     int i, status;
 816     char fold[BUFSIZ];
 817
 818     if (verbose)
 819         printf ("%sFcc: %s\n", msgstate == resent ? "Resent-" : "", folder);
 820     fflush (stdout);
 821
 822     for (i = 0; (child_id = vfork()) == NOTOK && i < 5; i++)
 823         sleep (5);
 824     switch (child_id) {
 825         case NOTOK:
 826             if (!verbose)
 827                 fprintf (stderr, "  %sFcc %s: ",
 828                         msgstate == resent ? "Resent-" : "", folder);
 829             fprintf (verbose ? stdout : stderr, "no forks, so not ok\n");
 830             break;
 831
 832         case OK:
 833             snprintf (fold, sizeof(fold), "%s%s",
 834                     *folder == '+' || *folder == '@' ? "" : "+", folder);
 835             execlp (fileproc, r1bindex (fileproc, '/'),
 836                     "-link", "-file", file, fold, NULL);
 837             _exit (-1);
 838
 839         default:
 840             if ((status = pidwait(child_id, OK))) {
 841                 if (!verbose)
 842                     fprintf (stderr, "  %sFcc %s: ",
 843                             msgstate == resent ? "Resent-" : "", folder);
 844                 fprintf (verbose ? stdout : stderr,
 845                         " errored (0%o)\n", status);
 846             }
 847     }
 848
 849     fflush (stdout);
 850 }
 851
 852
 853 #if 0
 854
 855 /*
 856  * TERMINATION
 857  */
 858
 859 static void
 860 die (char *what, char *fmt, ...)
 861 {
 862     va_list ap;
 863
 864     va_start(ap, fmt);
 865     advertise (what, NULL, fmt, ap);
 866     va_end(ap);
 867
 868     done (1);
 869 }
 870 #endif