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