git.marmaro.de Git - mmh/blob - uip/repl.c

   1 /*
   2 ** repl.c -- reply to a message
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <h/utils.h>
  11 #include <h/addrsbr.h>
  12 #include <h/fmt_scan.h>
  13 #include <sys/file.h>  /* L_SET */
  14 #include <errno.h>
  15 #include <unistd.h>
  16 #include <ctype.h>
  17 #include <sys/stat.h>
  18 #include <locale.h>
  19 #include <sysexits.h>
  20
  21 static struct swit switches[] = {
  22 #define GROUPSW  0
  23         { "group", 0 },
  24 #define NGROUPSW  1
  25         { "nogroup", 2 },
  26 #define ANNOSW  2
  27         { "annotate", 0 },
  28 #define NANNOSW  3
  29         { "noannotate", 2 },
  30 #define CCSW  4
  31         { "cc all|to|cc|me", 0 },
  32 #define NCCSW  5
  33         { "nocc type", 2 },
  34 #define EDITRSW  6
  35         { "editor editor", 0 },
  36 #define FILTSW  7
  37         { "filter filterfile", 0 },
  38 #define NFILTSW  8
  39         { "nofilter", 2 },
  40 #define FORMSW  9
  41         { "form formfile", 0 },
  42 #define MIMESW  10
  43         { "mime", 0 },
  44 #define NMIMESW  11
  45         { "nomime", 2 },
  46 #define QURYSW  12
  47         { "query", 0 },
  48 #define NQURYSW  13
  49         { "noquery", 2 },
  50 #define WHATSW  14
  51         { "whatnowproc program", 0 },
  52 #define VERSIONSW  15
  53         { "Version", 0 },
  54 #define HELPSW  16
  55         { "help", 0 },
  56 #define FILESW  17
  57         { "file file", 4 },  /* interface from msh */
  58 #define BILDSW  18
  59         { "build", 5 },  /* interface from mhe */
  60         { NULL, 0 }
  61 };
  62
  63 static struct swit ccswitches[] = {
  64 #define CTOSW  0
  65         { "to", 0 },
  66 #define CCCSW  1
  67         { "cc", 0 },
  68 #define CMESW  2
  69         { "me", 0 },
  70 #define CALSW  3
  71         { "all", 0 },
  72         { NULL, 0 }
  73 };
  74
  75 /*
  76 ** Buffer size for content part of header fields.
  77 ** We want this to be large enough so that we don't
  78 ** do a lot of extra FLDPLUS calls on m_getfld but
  79 ** small enough so that we don't snarf the entire
  80 ** message body when we're not going to use any of it.
  81 */
  82 #define SBUFSIZ 256
  83
  84 static short ccto = -1;
  85 static short cccc = -1;
  86 static short ccme = -1;
  87 static short querysw = 0;
  88
  89 static short groupreply = 0;  /* Is this a group reply? */
  90
  91 static int mime = 0;  /* include original as MIME part */
  92 static char *form   = NULL;  /* form (components) file */
  93 static char *filter = NULL;  /* message filter file */
  94
  95 static int dftype=0;
  96
  97 static char *badaddrs = NULL;
  98 static char *dfhost = NULL;
  99
 100 static struct mailname mq;
 101
 102 static struct format *fmt;
 103
 104 static int ncomps = 0;  /* # of interesting components */
 105 static char **compbuffers = NULL;  /* buffers for component text */
 106 static struct comp **used_buf = NULL;  /* stack for comp that use buffers */
 107
 108 static int dat[5];  /* aux. data for format routine */
 109
 110 static char *addrcomps[] = {
 111         "from",
 112         "sender",
 113         "reply-to",
 114         "to",
 115         "cc",
 116         "bcc",
 117         "resent-from",
 118         "resent-sender",
 119         "resent-reply-to",
 120         "resent-to",
 121         "resent-cc",
 122         "resent-bcc",
 123         NULL
 124 };
 125
 126 /*
 127 ** static prototypes
 128 */
 129 static void docc(char *, int);
 130 static int insert(struct mailname *);
 131 static void replfilter(FILE *, FILE *, char *);
 132 static void replout(FILE *, char *, struct msgs *, int,
 133                 char *, char *);
 134
 135
 136 int
 137 main(int argc, char **argv)
 138 {
 139         int anot = 0;
 140         char *cp, *cwd, *maildir, *file = NULL;
 141         char *folder = NULL, *msg = NULL;
 142         char *ed = NULL, drft[BUFSIZ], buf[BUFSIZ];
 143         char **argp, **arguments;
 144         struct msgs *mp = NULL;
 145         FILE *in;
 146         int buildsw = 0;
 147
 148         setlocale(LC_ALL, "");
 149         invo_name = mhbasename(argv[0]);
 150
 151         /* read user profile/context */
 152         context_read();
 153
 154         filter = getcpy(etcpath(mhlreply));
 155
 156         arguments = getarguments(invo_name, argc, argv, 1);
 157         argp = arguments;
 158
 159         while ((cp = *argp++)) {
 160                 if (*cp == '-') {
 161                         switch (smatch(++cp, switches)) {
 162                         case AMBIGSW:
 163                                 ambigsw(cp, switches);
 164                                 exit(EX_USAGE);
 165                         case UNKWNSW:
 166                                 adios(EX_USAGE, NULL, "-%s unknown", cp);
 167
 168                         case HELPSW:
 169                                 snprintf(buf, sizeof(buf), "%s: [+folder] [msg] [switches]", invo_name);
 170                                 print_help(buf, switches, 1);
 171                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 172                         case VERSIONSW:
 173                                 print_version(invo_name);
 174                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 175
 176                         case GROUPSW:
 177                                 groupreply++;
 178                                 continue;
 179                         case NGROUPSW:
 180                                 groupreply = 0;
 181                                 continue;
 182
 183                         case ANNOSW:
 184                                 anot++;
 185                                 continue;
 186                         case NANNOSW:
 187                                 anot = 0;
 188                                 continue;
 189
 190                         case CCSW:
 191                                 if (!(cp = *argp++) || *cp == '-')
 192                                         adios(EX_USAGE, NULL, "missing argument to %s",
 193                                                         argp[-2]);
 194                                 docc(cp, 1);
 195                                 continue;
 196                         case NCCSW:
 197                                 if (!(cp = *argp++) || *cp == '-')
 198                                         adios(EX_USAGE, NULL, "missing argument to %s",
 199                                                         argp[-2]);
 200                                 docc(cp, 0);
 201                                 continue;
 202
 203                         case EDITRSW:
 204                                 if (!(ed = *argp++) || *ed == '-')
 205                                         adios(EX_USAGE, NULL, "missing argument to %s",
 206                                                         argp[-2]);
 207                                 continue;
 208
 209                         case WHATSW:
 210                                 if (!(whatnowproc = *argp++) ||
 211                                                 *whatnowproc == '-')
 212                                         adios(EX_USAGE, NULL, "missing argument to %s",
 213                                                         argp[-2]);
 214                                 continue;
 215
 216                         case BILDSW:
 217                                 buildsw++;
 218                                 continue;
 219
 220                         case FILESW:
 221                                 if (file)
 222                                         adios(EX_USAGE, NULL, "only one file at a time!");
 223                                 if (!(cp = *argp++) || *cp == '-')
 224                                         adios(EX_USAGE, NULL, "missing argument to %s",
 225                                                         argp[-2]);
 226                                 file = getcpy(expanddir(cp));
 227                                 continue;
 228                         case FORMSW:
 229                                 if (!(form = *argp++) || *form == '-')
 230                                         adios(EX_USAGE, NULL, "missing argument to %s",
 231                                                         argp[-2]);
 232                                 continue;
 233
 234                         case FILTSW:
 235                                 if (!(cp = *argp++) || *cp == '-')
 236                                         adios(EX_USAGE, NULL, "missing argument to %s",
 237                                                         argp[-2]);
 238                                 filter = getcpy(etcpath(cp));
 239                                 continue;
 240                         case NFILTSW:
 241                                 filter = NULL;
 242                                 continue;
 243
 244                         case MIMESW:
 245                                 mime++;
 246                                 continue;
 247                         case NMIMESW:
 248                                 mime = 0;
 249                                 continue;
 250
 251                         case QURYSW:
 252                                 querysw++;
 253                                 continue;
 254                         case NQURYSW:
 255                                 querysw = 0;
 256                                 continue;
 257
 258                         }
 259                 }
 260                 if (*cp == '+' || *cp == '@') {
 261                         if (folder)
 262                                 adios(EX_USAGE, NULL, "only one folder at a time!");
 263                         else
 264                                 folder = getcpy(expandfol(cp));
 265                 } else {
 266                         if (msg)
 267                                 adios(EX_USAGE, NULL, "only one message at a time!");
 268                         else
 269                                 msg = cp;
 270                 }
 271         }
 272
 273         if (ccto == -1)
 274                 ccto = groupreply;
 275         if (cccc == -1)
 276                 cccc = groupreply;
 277         if (ccme == -1)
 278                 ccme = groupreply;
 279
 280         cwd = getcpy(pwd());
 281
 282         if (file && (msg || folder))
 283                 adios(EX_USAGE, NULL, "can't mix files and folders/msgs");
 284
 285         strncpy(drft, buildsw ? toabsdir("reply") : m_draft(seq_beyond),
 286                         sizeof(drft));
 287         /*
 288         ** FIXME: (concerning MHE support (buildsw) only)
 289         ** There's no check if the draft already exists. mmh has removed
 290         ** this case by having the draft folder. I won't add code only to
 291         ** handle this legacy issue for MHE. -- meillo@marmaro.de 2012-05
 292         */
 293
 294         if (file) {
 295                 /*
 296                 ** We are replying to a file.
 297                 */
 298                 anot = 0;  /* we don't want to annotate a file */
 299         } else {
 300                 /*
 301                 ** We are replying to a message.
 302                 */
 303                 if (!msg)
 304                         msg = seq_cur;
 305                 if (!folder)
 306                         folder = getcurfol();
 307                 maildir = toabsdir(folder);
 308
 309                 if (chdir(maildir) == NOTOK)
 310                         adios(EX_OSERR, maildir, "unable to change directory to");
 311
 312                 /* read folder and create message structure */
 313                 if (!(mp = folder_read(folder)))
 314                         adios(EX_IOERR, NULL, "unable to read folder %s", folder);
 315
 316                 /* check for empty folder */
 317                 if (mp->nummsg == 0)
 318                         adios(EX_DATAERR, NULL, "no messages in %s", folder);
 319
 320                 /* parse the message range/sequence/name and set SELECTED */
 321                 if (!m_convert(mp, msg))
 322                         exit(EX_SOFTWARE);
 323                 seq_setprev(mp);  /* set the previous-sequence */
 324
 325                 if (mp->numsel > 1)
 326                         adios(EX_USAGE, NULL, "only one message at a time!");
 327
 328                 context_replace(curfolder, folder); /* update current folder */
 329                 seq_setcur(mp, mp->lowsel);  /* update current message  */
 330                 seq_save(mp);  /* synchronize sequences   */
 331                 context_save();  /* save the context file   */
 332         }
 333
 334         msg = file ? file : getcpy(m_name(mp->lowsel));
 335
 336         if ((in = fopen(msg, "r")) == NULL)
 337                 adios(EX_IOERR, msg, "unable to open");
 338
 339         /* find form (components) file */
 340         if (!form) {
 341                 if (groupreply)
 342                         form = etcpath(replgroupcomps);
 343                 else
 344                         form = etcpath(replcomps);
 345         }
 346
 347         replout(in, drft, mp, mime, form, filter);
 348         fclose(in);
 349
 350         if (buildsw)
 351                 exit(EX_OK);
 352         what_now(ed, NOUSE, drft, msg, 0, mp, anot ? "Replied" : NULL, cwd);
 353         return EX_OSERR;
 354 }
 355
 356 static void
 357 docc(char *cp, int ccflag)
 358 {
 359         switch (smatch(cp, ccswitches)) {
 360         case AMBIGSW:
 361                 ambigsw(cp, ccswitches);
 362                 exit(EX_USAGE);
 363         case UNKWNSW:
 364                 adios(EX_USAGE, NULL, "-%scc %s unknown", ccflag ? "" : "no", cp);
 365
 366         case CTOSW:
 367                 ccto = ccflag;
 368                 break;
 369
 370         case CCCSW:
 371                 cccc = ccflag;
 372                 break;
 373
 374         case CMESW:
 375                 ccme = ccflag;
 376                 break;
 377
 378         case CALSW:
 379                 ccto = cccc = ccme = ccflag;
 380                 break;
 381         }
 382 }
 383
 384
 385
 386
 387 static void
 388 replout(FILE *inb, char *drft, struct msgs *mp,
 389         int mime, char *form, char *filter)
 390 {
 391         int state, i;
 392         struct comp *cptr;
 393         char *tmpbuf;
 394         char **nxtbuf;
 395         char **ap;
 396         struct comp **savecomp;
 397         int char_read = 0, format_len, mask;
 398         char name[NAMESZ], *scanl;
 399         unsigned char *cp;
 400         FILE *out;
 401
 402         mask = umask(~m_gmprot());
 403         if ((out = fopen(drft, "w")) == NULL)
 404                 adios(EX_CANTCREAT, drft, "unable to create");
 405
 406         umask(mask);
 407
 408         /* get new format string */
 409         cp = new_fs(form, NULL);
 410         format_len = strlen(cp);
 411
 412         /* compile format string */
 413         ncomps = fmt_compile(cp, &fmt) + 1;
 414
 415         nxtbuf = compbuffers = mh_xcalloc(ncomps, sizeof(char *));
 416         savecomp = used_buf = mh_xcalloc(ncomps+1, sizeof(struct comp *));
 417         savecomp += ncomps + 1;
 418         *--savecomp = NULL;  /* point at zero'd end minus 1 */
 419
 420         for (i = ncomps; i--; )
 421                 *nxtbuf++ = mh_xcalloc(SBUFSIZ, sizeof(char));
 422
 423         nxtbuf = compbuffers;  /* point at start */
 424         tmpbuf = *nxtbuf++;
 425
 426         for (ap = addrcomps; *ap; ap++) {
 427                 FINDCOMP(cptr, *ap);
 428                 if (cptr)
 429                         cptr->c_type |= CT_ADDR;
 430         }
 431
 432         /*
 433         ** ignore any components killed by command line switches
 434         */
 435         if (!ccto) {
 436                 FINDCOMP(cptr, "to");
 437                 if (cptr)
 438                         cptr->c_name = "";
 439         }
 440         if (!cccc) {
 441                 FINDCOMP(cptr, "cc");
 442                 if (cptr)
 443                         cptr->c_name = "";
 444         }
 445         if ((cp = getenv("USER"))) {
 446                 FINDCOMP(cptr, "user");
 447                 if (cptr)
 448                         cptr->c_text = getcpy(cp);
 449         }
 450         if (!ccme)
 451                 ismymbox(NULL);
 452
 453         /*
 454         ** pick any interesting stuff out of msg "inb"
 455         */
 456         for (state = FLD;;) {
 457                 state = m_getfld(state, name, tmpbuf, SBUFSIZ, inb);
 458                 switch (state) {
 459                 case FLD:
 460                 case FLDPLUS:
 461                         /*
 462                         ** if we're interested in this component, save
 463                         ** a pointer to the component text, then start
 464                         ** using our next free buffer as the component
 465                         ** temp buffer (buffer switching saves an extra
 466                         ** copy of the component text).
 467                         */
 468                         if ((cptr = wantcomp[CHASH(name)]))
 469                                 do {
 470                                         if (!mh_strcasecmp(name, cptr->c_name)) {
 471                                                 char_read += msg_count;
 472                                                 if (! cptr->c_text) {
 473                                                         i = strlen(cptr->c_text = tmpbuf) - 1;
 474                                                         if (tmpbuf[i] == '\n')
 475                                                                 tmpbuf[i] = '\0';
 476                                                         *--savecomp = cptr;
 477                                                         tmpbuf = *nxtbuf++;
 478                                                 } else {
 479                                                         i = strlen(cp = cptr->c_text) - 1;
 480                                                         if (cp[i] == '\n') {
 481                                                                 if (cptr->c_type & CT_ADDR) {
 482                                                                         cp[i] = '\0';
 483                                                                         cp = add(",\n\t", cp);
 484                                                                 } else {
 485                                                                         cp = add("\t", cp);
 486                                                                 }
 487                                                         }
 488                                                         cptr->c_text = add(tmpbuf, cp);
 489                                                 }
 490                                                 while (state == FLDPLUS) {
 491                                                         state = m_getfld(state, name, tmpbuf,
 492                                                                                           SBUFSIZ, inb);
 493                                                         cptr->c_text = add(tmpbuf, cptr->c_text);
 494                                                         char_read += msg_count;
 495                                                 }
 496                                                 break;
 497                                         }
 498                                 } while ((cptr = cptr->c_next));
 499
 500                         while (state == FLDPLUS)
 501                                 state = m_getfld(state, name, tmpbuf,
 502                                                 SBUFSIZ, inb);
 503                         break;
 504
 505                 case LENERR:
 506                 case FMTERR:
 507                 case BODY:
 508                 case FILEEOF:
 509                         goto finished;
 510
 511                 default:
 512                         adios(EX_SOFTWARE, NULL, "m_getfld() returned %d", state);
 513                 }
 514         }
 515
 516         /*
 517         ** format and output the header lines.
 518         */
 519 finished:
 520
 521         /*
 522         ** if there's a "Subject" component, strip any "Re:"s off it
 523         */
 524         FINDCOMP(cptr, "subject")
 525         if (cptr && (cp = cptr->c_text)) {
 526                 char *sp = cp;
 527
 528                 for (;;) {
 529                         while (isspace(*cp))
 530                                 cp++;
 531                         if(uprf(cp, "re:"))
 532                                 cp += 3;
 533                         else
 534                                 break;
 535                         sp = cp;
 536                 }
 537                 if (sp != cptr->c_text) {
 538                         cp = cptr->c_text;
 539                         cptr->c_text = getcpy(sp);
 540                         free(cp);
 541                 }
 542         }
 543         i = format_len + char_read + 256;
 544         scanl = mh_xcalloc(i + 2, sizeof(char));
 545         dat[0] = 0;
 546         dat[1] = 0;
 547         dat[2] = 0;
 548         dat[3] = OUTPUTLINELEN;
 549         dat[4] = 0;
 550         fmt_scan(fmt, scanl, i, dat);
 551         fputs(scanl, out);
 552         if (badaddrs) {
 553                 fputs("\nrepl: bad addresses:\n", out);
 554                 fputs( badaddrs, out);
 555         }
 556
 557         /* Check if we should filter the message */
 558         if (filter) {
 559                 fflush(out);
 560                 if (ferror(out))
 561                         adios(EX_IOERR, drft, "error writing");
 562
 563                 replfilter(inb, out, filter);
 564         }
 565
 566         fflush(out);
 567         if (ferror(out))
 568                 adios(EX_IOERR, drft, "error writing");
 569         fclose(out);
 570
 571         if (mime && mp) {
 572                 /* add an attachment header */
 573                 char buffer[BUFSIZ];
 574
 575                 snprintf(buffer, sizeof buffer, "+%s %s",
 576                                 mp->foldpath, m_name(mp->lowsel));
 577                 if (execprogl("anno", "anno", "-append", "-nodate",
 578                                 drft, "-comp", attach_hdr, "-text", buffer,
 579                                 (char *)NULL) != 0) {
 580                         advise(NULL, "unable to add attachment header");
 581                 }
 582         }
 583
 584         /* return dynamically allocated buffers */
 585         free(scanl);
 586         for (nxtbuf = compbuffers, i = ncomps; (cptr = *savecomp++);
 587                         nxtbuf++, i--)
 588                 free(cptr->c_text);  /* if not nxtbuf, nxtbuf already freed */
 589         while ( i-- > 0)
 590                 free(*nxtbuf++);  /* free unused nxtbufs */
 591         free((char *) compbuffers);
 592         free((char *) used_buf);
 593 }
 594
 595 static char *buf;  /* our current working buffer */
 596 static char *bufend;  /* end of working buffer */
 597 static char *last_dst;  /* buf ptr at end of last call */
 598 static unsigned int bufsiz=0;  /* current size of buf */
 599
 600 #define BUFINCR 512  /* how much to expand buf when if fills */
 601
 602 #define CPY(s) { cp = (s); while ((*dst++ = *cp++)) ; --dst; }
 603
 604 /*
 605 ** check if there's enough room in buf for str.
 606 ** add more mem if needed
 607 */
 608 #define CHECKMEM(str) \
 609         if ((len = strlen(str)) >= bufend - dst) {\
 610                 int i = dst - buf;\
 611                 int n = last_dst - buf;\
 612                 bufsiz += ((dst + len - bufend) / BUFINCR + 1) * BUFINCR;\
 613                 buf = mh_xrealloc(buf, bufsiz);\
 614                 dst = buf + i;\
 615                 last_dst = buf + n;\
 616                 bufend = buf + bufsiz;\
 617         }
 618
 619
 620 /*
 621 ** fmt_scan will call this routine if the user includes the function
 622 ** "(formataddr {component})" in a format string.  "orig" is the
 623 ** original contents of the string register.  "str" is the address
 624 ** string to be formatted and concatenated onto orig.  This routine
 625 ** returns a pointer to the concatenated address string.
 626 **
 627 ** We try to not do a lot of malloc/copy/free's (which is why we
 628 ** don't call "getcpy") but still place no upper limit on the
 629 ** length of the result string.
 630 **
 631 ** This routine is an override for the equally named one in sbr/fmt_addr.c.
 632 ** Don't delete it!
 633 */
 634 char *
 635 formataddr(char *orig, char *str)
 636 {
 637         int len;
 638         char baddr[BUFSIZ], error[BUFSIZ];
 639         int isgroup;
 640         char *dst;
 641         char *cp;
 642         char *sp;
 643         struct mailname *mp = NULL;
 644
 645         /* if we don't have a buffer yet, get one */
 646         if (bufsiz == 0) {
 647                 buf = mh_xcalloc(BUFINCR, sizeof(char));
 648                 last_dst = buf;  /* XXX */
 649                 bufsiz = BUFINCR - 6;  /* leave some slop */
 650                 bufend = buf + bufsiz;
 651         }
 652         /*
 653         ** If "orig" points to our buffer we can just pick up where we
 654         ** left off.  Otherwise we have to copy orig into our buffer.
 655         */
 656         if (orig == buf)
 657                 dst = last_dst;
 658         else if (!orig || !*orig) {
 659                 dst = buf;
 660                 *dst = '\0';
 661         } else {
 662                 dst = last_dst;  /* XXX */
 663                 CHECKMEM(orig);
 664                 CPY(orig);
 665         }
 666
 667         /* concatenate all the new addresses onto 'buf' */
 668         for (isgroup = 0; (cp = getname(str)); ) {
 669                 if ((mp = getm(cp, dfhost, dftype, AD_NAME, error)) == NULL) {
 670                         snprintf(baddr, sizeof(baddr), "\t%s -- %s\n",
 671                                         cp, error);
 672                         badaddrs = add(baddr, badaddrs);
 673                         continue;
 674                 }
 675                 if (isgroup && (mp->m_gname || !mp->m_ingrp)) {
 676                         *dst++ = ';';
 677                         isgroup = 0;
 678                 }
 679                 if (insert(mp)) {
 680                         /* if we get here we're going to add an address */
 681                         if (dst != buf) {
 682                                 *dst++ = ',';
 683                                 *dst++ = ' ';
 684                         }
 685                         if (mp->m_gname) {
 686                                 CHECKMEM(mp->m_gname);
 687                                 CPY(mp->m_gname);
 688                                 isgroup++;
 689                         }
 690                         sp = adrformat(mp);
 691                         CHECKMEM(sp);
 692                         CPY(sp);
 693                 }
 694         }
 695
 696         if (isgroup)
 697                 *dst++ = ';';
 698
 699         *dst = '\0';
 700         last_dst = dst;
 701         return (buf);
 702 }
 703
 704
 705 static int
 706 insert(struct mailname *np)
 707 {
 708         char buffer[BUFSIZ];
 709         struct mailname *mp;
 710
 711         if (np->m_mbox == NULL)
 712                 return 0;
 713
 714         for (mp = &mq; mp->m_next; mp = mp->m_next) {
 715                 if (!mh_strcasecmp(np->m_host, mp->m_next->m_host) &&
 716                                 !mh_strcasecmp(np->m_mbox, mp->m_next->m_mbox))
 717                         return 0;
 718         }
 719         if (!ccme && ismymbox(np))
 720                 return 0;
 721
 722         if (querysw) {
 723                 snprintf(buffer, sizeof(buffer), "Reply to %s? ",
 724                                 adrformat(np));
 725                 if (!gans(buffer, anoyes))
 726                         return 0;
 727         }
 728         mp->m_next = np;
 729         return 1;
 730 }
 731
 732
 733 /*
 734 ** Call mhl
 735 **
 736 ** This function expects that argument out has been fflushed by the caller.
 737 */
 738 static void
 739 replfilter(FILE *in, FILE *out, char *filter)
 740 {
 741         int pid, pid_show, n;
 742         int mailpipe[2];
 743         char *errstr;
 744
 745         if (filter == NULL)
 746                 return;
 747
 748         if (access(filter, R_OK) == NOTOK)
 749                 adios(EX_IOERR, filter, "unable to read");
 750
 751         rewind(in);
 752         lseek(fileno(in), (off_t) 0, SEEK_SET);
 753
 754         if (pipe(mailpipe) == -1) {
 755                 adios(EX_OSERR, "pipe", "can't create pipe");
 756         }
 757
 758         switch (pid_show = fork()) {
 759         case NOTOK:
 760                 adios(EX_OSERR, "fork", "unable to");
 761
 762         case OK:
 763                 dup2(fileno(in), fileno(stdin));
 764                 dup2(mailpipe[1], fileno(stdout));
 765                 for (n=3; n<OPEN_MAX; n++) {
 766                         close(n);
 767                 }
 768
 769                 execlp("show", "show", "-file", "-", NULL);
 770
 771                 adios(EX_OSERR, "exec", "unable to");
 772         }
 773
 774         switch (pid = fork()) {
 775         case NOTOK:
 776                 adios(EX_OSERR, "fork", "unable to");
 777
 778         case OK:
 779                 dup2(mailpipe[0], fileno(stdin));
 780                 dup2(fileno(out), fileno(stdout));
 781                 for (n=3; n<OPEN_MAX; n++) {
 782                         close(n);
 783                 }
 784
 785                 execlp("mhl", "mhl", "-form", filter, NULL);
 786                 errstr = strerror(errno);
 787                 write(2, "unable to exec mhl: ", 20);
 788                 write(2, errstr, strlen(errstr));
 789                 write(2, "\n", 1);
 790                 _exit(EX_OSERR);
 791
 792         default:
 793                 if (pidXwait(-1, "show | mhl"))
 794                         exit(EX_SOFTWARE);
 795                 fseek(out, 0L, SEEK_END);
 796                 break;
 797         }
 798
 799         close(mailpipe[0]);
 800         close(mailpipe[1]);
 801 }