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

   1
   2 /*
   3  * replsbr.c -- routines to help repl along...
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/addrsbr.h>
  12 #include <h/fmt_scan.h>
  13 #include <h/utils.h>
  14 #include <sys/file.h>           /* L_SET */
  15 #include <errno.h>
  16
  17 extern short ccto;              /* from repl.c */
  18 extern short cccc;
  19 extern short ccme;
  20 extern short querysw;
  21
  22 static int dftype=0;
  23
  24 static char *badaddrs = NULL;
  25 static char *dfhost = NULL;
  26
  27 static struct mailname mq;
  28 static int nodupcheck = 0;              /* If set, no check for duplicates */
  29
  30 /*
  31  * Buffer size for content part of header fields.
  32  * We want this to be large enough so that we don't
  33  * do a lot of extra FLDPLUS calls on m_getfld but
  34  * small enough so that we don't snarf the entire
  35  * message body when we're not going to use any of it.
  36  */
  37 #define SBUFSIZ 256
  38
  39 static struct format *fmt;
  40
  41 static int ncomps = 0;                  /* # of interesting components */
  42 static char **compbuffers = NULL;       /* buffers for component text */
  43 static struct comp **used_buf = NULL;   /* stack for comp that use buffers */
  44
  45 static int dat[5];                      /* aux. data for format routine */
  46
  47 static char *addrcomps[] = {
  48     "from",
  49     "sender",
  50     "reply-to",
  51     "to",
  52     "cc",
  53     "bcc",
  54     "resent-from",
  55     "resent-sender",
  56     "resent-reply-to",
  57     "resent-to",
  58     "resent-cc",
  59     "resent-bcc",
  60     NULL
  61 };
  62
  63 /*
  64  * static prototypes
  65  */
  66 static int insert (struct mailname *);
  67 static void replfilter (FILE *, FILE *, char *, int);
  68
  69
  70 void
  71 replout (FILE *inb, char *msg, char *drft, struct msgs *mp, int outputlinelen,
  72         int mime, char *form, char *filter, char *fcc, int fmtproc)
  73 {
  74     NMH_UNUSED (msg);
  75
  76     register int state, i;
  77     register struct comp *cptr;
  78     register char *tmpbuf;
  79     register char **nxtbuf;
  80     register char **ap;
  81     register struct comp **savecomp;
  82     int char_read = 0, format_len, mask;
  83     char name[NAMESZ], *scanl;
  84     unsigned char *cp;
  85     FILE *out;
  86
  87     mask = umask(~m_gmprot());
  88     if ((out = fopen (drft, "w")) == NULL)
  89         adios (drft, "unable to create");
  90
  91     umask(mask);
  92
  93     /* get new format string */
  94     cp = new_fs (form, NULL, NULL);
  95     format_len = strlen (cp);
  96
  97     /* compile format string */
  98     ncomps = fmt_compile (cp, &fmt) + 1;
  99
 100     if (!(nxtbuf = compbuffers = (char **)
 101             calloc((size_t) ncomps, sizeof(char *))))
 102         adios (NULL, "unable to allocate component buffers");
 103     if (!(savecomp = used_buf = (struct comp **)
 104             calloc((size_t) (ncomps+1), sizeof(struct comp *))))
 105         adios (NULL, "unable to allocate component buffer stack");
 106     savecomp += ncomps + 1;
 107     *--savecomp = NULL;         /* point at zero'd end minus 1 */
 108
 109     for (i = ncomps; i--; )
 110         *nxtbuf++ = mh_xmalloc(SBUFSIZ);
 111
 112     nxtbuf = compbuffers;               /* point at start */
 113     tmpbuf = *nxtbuf++;
 114
 115     for (ap = addrcomps; *ap; ap++) {
 116         FINDCOMP (cptr, *ap);
 117         if (cptr)
 118             cptr->c_type |= CT_ADDR;
 119     }
 120
 121     /*
 122      * ignore any components killed by command line switches
 123      */
 124     if (!ccto) {
 125         FINDCOMP (cptr, "to");
 126         if (cptr)
 127             cptr->c_name = "";
 128     }
 129     if (!cccc) {
 130         FINDCOMP (cptr, "cc");
 131         if (cptr)
 132             cptr->c_name = "";
 133     }
 134     /* set up the "fcc" pseudo-component */
 135     if (fcc) {
 136         FINDCOMP (cptr, "fcc");
 137         if (cptr)
 138             cptr->c_text = getcpy (fcc);
 139     }
 140     if ((cp = getenv("USER"))) {
 141         FINDCOMP (cptr, "user");
 142         if (cptr)
 143             cptr->c_text = getcpy(cp);
 144     }
 145     if (!ccme)
 146         ismymbox (NULL);
 147
 148     /*
 149      * pick any interesting stuff out of msg "inb"
 150      */
 151     for (state = FLD;;) {
 152         state = m_getfld (state, name, tmpbuf, SBUFSIZ, inb);
 153         switch (state) {
 154             case FLD:
 155             case FLDPLUS:
 156                 /*
 157                  * if we're interested in this component, save a pointer
 158                  * to the component text, then start using our next free
 159                  * buffer as the component temp buffer (buffer switching
 160                  * saves an extra copy of the component text).
 161                  */
 162                 if ((cptr = wantcomp[CHASH(name)]))
 163                     do {
 164                         if (!mh_strcasecmp(name, cptr->c_name)) {
 165                             char_read += msg_count;
 166                             if (! cptr->c_text) {
 167                                 cptr->c_text = tmpbuf;
 168                                 *--savecomp = cptr;
 169                                 tmpbuf = *nxtbuf++;
 170                             } else {
 171                                 i = strlen (cp = cptr->c_text) - 1;
 172                                 if (cp[i] == '\n') {
 173                                     if (cptr->c_type & CT_ADDR) {
 174                                         cp[i] = '\0';
 175                                         cp = add (",\n\t", cp);
 176                                     } else {
 177                                         cp = add ("\t", cp);
 178                                     }
 179                                 }
 180                                 cptr->c_text = add (tmpbuf, cp);
 181                             }
 182                             while (state == FLDPLUS) {
 183                                 state = m_getfld (state, name, tmpbuf,
 184                                                   SBUFSIZ, inb);
 185                                 cptr->c_text = add (tmpbuf, cptr->c_text);
 186                                 char_read += msg_count;
 187                             }
 188                             break;
 189                         }
 190                     } while ((cptr = cptr->c_next));
 191
 192                 while (state == FLDPLUS)
 193                     state = m_getfld (state, name, tmpbuf, SBUFSIZ, inb);
 194                 break;
 195
 196             case LENERR:
 197             case FMTERR:
 198             case BODY:
 199             case FILEEOF:
 200                 goto finished;
 201
 202             default:
 203                 adios (NULL, "m_getfld() returned %d", state);
 204         }
 205     }
 206
 207     /*
 208      * format and output the header lines.
 209      */
 210 finished:
 211
 212     /*
 213      * if there's a "Subject" component, strip any "Re:"s off it
 214      */
 215     FINDCOMP (cptr, "subject")
 216     if (cptr && (cp = cptr->c_text)) {
 217         register char *sp = cp;
 218
 219         for (;;) {
 220             while (isspace(*cp))
 221                 cp++;
 222             if(uprf(cp, "re:"))
 223                 cp += 3;
 224             else
 225                 break;
 226             sp = cp;
 227         }
 228         if (sp != cptr->c_text) {
 229             cp = cptr->c_text;
 230             cptr->c_text = getcpy (sp);
 231             free (cp);
 232         }
 233     }
 234     i = format_len + char_read + 256;
 235     scanl = mh_xmalloc ((size_t) i + 2);
 236     dat[0] = 0;
 237     dat[1] = 0;
 238     dat[2] = 0;
 239     dat[3] = outputlinelen;
 240     dat[4] = 0;
 241     fmt_scan (fmt, scanl, i, dat);
 242     fputs (scanl, out);
 243     if (badaddrs) {
 244         fputs ("\nrepl: bad addresses:\n", out);
 245         fputs ( badaddrs, out);
 246     }
 247
 248     /*
 249      * Check if we should filter the message
 250      * or add mhn directives
 251      */
 252     if (filter) {
 253         fflush(out);
 254         if (ferror (out))
 255             adios (drft, "error writing");
 256
 257         replfilter (inb, out, filter, fmtproc);
 258     } else if (mime && mp) {
 259             fprintf (out, "#forw [original message] +%s %s\n",
 260                      mp->foldpath, m_name (mp->lowsel));
 261     }
 262
 263     fflush(out);
 264     if (ferror (out))
 265         adios (drft, "error writing");
 266     fclose (out);
 267
 268     /* return dynamically allocated buffers */
 269     free (scanl);
 270     for (nxtbuf = compbuffers, i = ncomps; (cptr = *savecomp++); nxtbuf++, i--)
 271         free (cptr->c_text);    /* if not nxtbuf, nxtbuf already freed */
 272     while ( i-- > 0)
 273         free (*nxtbuf++);       /* free unused nxtbufs */
 274     free ((char *) compbuffers);
 275     free ((char *) used_buf);
 276 }
 277
 278 static char *buf;               /* our current working buffer */
 279 static char *bufend;            /* end of working buffer */
 280 static char *last_dst;          /* buf ptr at end of last call */
 281 static unsigned int bufsiz=0;   /* current size of buf */
 282
 283 #define BUFINCR 512             /* how much to expand buf when if fills */
 284
 285 #define CPY(s) { cp = (s); while ((*dst++ = *cp++)) ; --dst; }
 286
 287 /*
 288  * check if there's enough room in buf for str.
 289  * add more mem if needed
 290  */
 291 #define CHECKMEM(str) \
 292             if ((len = strlen (str)) >= bufend - dst) {\
 293                 int i = dst - buf;\
 294                 int n = last_dst - buf;\
 295                 bufsiz += ((dst + len - bufend) / BUFINCR + 1) * BUFINCR;\
 296                 buf = mh_xrealloc (buf, bufsiz);\
 297                 dst = buf + i;\
 298                 last_dst = buf + n;\
 299                 bufend = buf + bufsiz;\
 300             }
 301
 302
 303 /*
 304  * fmt_scan will call this routine if the user includes the function
 305  * "(formataddr {component})" in a format string.  "orig" is the
 306  * original contents of the string register.  "str" is the address
 307  * string to be formatted and concatenated onto orig.  This routine
 308  * returns a pointer to the concatenated address string.
 309  *
 310  * We try to not do a lot of malloc/copy/free's (which is why we
 311  * don't call "getcpy") but still place no upper limit on the
 312  * length of the result string.
 313  */
 314 char *
 315 formataddr (char *orig, char *str)
 316 {
 317     register int len;
 318     char baddr[BUFSIZ], error[BUFSIZ];
 319     register int isgroup;
 320     register char *dst;
 321     register char *cp;
 322     register char *sp;
 323     register struct mailname *mp = NULL;
 324
 325     /* if we don't have a buffer yet, get one */
 326     if (bufsiz == 0) {
 327         buf = mh_xmalloc (BUFINCR);
 328         last_dst = buf;         /* XXX */
 329         bufsiz = BUFINCR - 6;  /* leave some slop */
 330         bufend = buf + bufsiz;
 331     }
 332     /*
 333      * If "orig" points to our buffer we can just pick up where we
 334      * left off.  Otherwise we have to copy orig into our buffer.
 335      */
 336     if (orig == buf)
 337         dst = last_dst;
 338     else if (!orig || !*orig) {
 339         dst = buf;
 340         *dst = '\0';
 341     } else {
 342         dst = last_dst;         /* XXX */
 343         CHECKMEM (orig);
 344         CPY (orig);
 345     }
 346
 347     /* concatenate all the new addresses onto 'buf' */
 348     for (isgroup = 0; (cp = getname (str)); ) {
 349         if ((mp = getm (cp, dfhost, dftype, AD_NAME, error)) == NULL) {
 350             snprintf (baddr, sizeof(baddr), "\t%s -- %s\n", cp, error);
 351             badaddrs = add (baddr, badaddrs);
 352             continue;
 353         }
 354         if (isgroup && (mp->m_gname || !mp->m_ingrp)) {
 355             *dst++ = ';';
 356             isgroup = 0;
 357         }
 358         if (insert (mp)) {
 359             /* if we get here we're going to add an address */
 360             if (dst != buf) {
 361                 *dst++ = ',';
 362                 *dst++ = ' ';
 363             }
 364             if (mp->m_gname) {
 365                 CHECKMEM (mp->m_gname);
 366                 CPY (mp->m_gname);
 367                 isgroup++;
 368             }
 369             sp = adrformat (mp);
 370             CHECKMEM (sp);
 371             CPY (sp);
 372         }
 373     }
 374
 375     if (isgroup)
 376         *dst++ = ';';
 377
 378     *dst = '\0';
 379     last_dst = dst;
 380     return (buf);
 381 }
 382
 383
 384 /*
 385  * fmt_scan will call this routine if the user includes the function
 386  * "(concataddr {component})" in a format string.  This behaves exactly
 387  * like formataddr, except that it does NOT suppress duplicate addresses
 388  * between calls.
 389  *
 390  * As an implementation detail: I thought about splitting out formataddr()
 391  * into the generic part and duplicate-suppressing part, but the call to
 392  * insert() was buried deep within a couple of loops and I didn't see a
 393  * way to do it easily.  So instead we simply set a special flag to stop
 394  * the duplicate check and call formataddr().
 395  */
 396 char *
 397 concataddr(char *orig, char *str)
 398 {
 399     char *cp;
 400
 401     nodupcheck = 1;
 402     cp = formataddr(orig, str);
 403     nodupcheck = 0;
 404     return cp;
 405 }
 406
 407 static int
 408 insert (struct mailname *np)
 409 {
 410     char buffer[BUFSIZ];
 411     register struct mailname *mp;
 412
 413     if (nodupcheck)
 414         return 1;
 415
 416     if (np->m_mbox == NULL)
 417         return 0;
 418
 419     for (mp = &mq; mp->m_next; mp = mp->m_next) {
 420         if (!mh_strcasecmp (np->m_host, mp->m_next->m_host)
 421                 && !mh_strcasecmp (np->m_mbox, mp->m_next->m_mbox))
 422             return 0;
 423     }
 424     if (!ccme && ismymbox (np))
 425         return 0;
 426
 427     if (querysw) {
 428         snprintf (buffer, sizeof(buffer), "Reply to %s? ", adrformat (np));
 429         if (!gans (buffer, anoyes))
 430         return 0;
 431     }
 432     mp->m_next = np;
 433
 434 #ifdef ISI
 435     if (ismymbox (np))
 436         ccme = 0;
 437 #endif
 438
 439     return 1;
 440 }
 441
 442
 443 /*
 444  * Call the mhlproc
 445  *
 446  * This function expects that argument out has been fflushed by the caller.
 447  */
 448
 449 static void
 450 replfilter (FILE *in, FILE *out, char *filter, int fmtproc)
 451 {
 452     int pid;
 453     char *mhl;
 454     char *errstr;
 455     char *arglist[7];
 456
 457     if (filter == NULL)
 458         return;
 459
 460     if (access (filter, R_OK) == NOTOK)
 461         adios (filter, "unable to read");
 462
 463     mhl = r1bindex (mhlproc, '/');
 464
 465     rewind (in);
 466     lseek (fileno(in), (off_t) 0, SEEK_SET);
 467
 468     switch (pid = vfork()) {
 469         case NOTOK:
 470             adios ("fork", "unable to");
 471
 472         case OK:
 473             dup2 (fileno (in), fileno (stdin));
 474             dup2 (fileno (out), fileno (stdout));
 475             closefds (3);
 476
 477             arglist[0] = mhl;
 478             arglist[1] = "-form";
 479             arglist[2] = filter;
 480             arglist[3] = "-noclear";
 481
 482             switch (fmtproc) {
 483             case 1:
 484                 arglist[4] = "-fmtproc";
 485                 arglist[5] = formatproc;
 486                 arglist[6] = NULL;
 487                 break;
 488             case 0:
 489                 arglist[4] = "-nofmtproc";
 490                 arglist[5] = NULL;
 491                 break;
 492             default:
 493                 arglist[4] = NULL;
 494             }
 495
 496             execvp (mhlproc, arglist);
 497             errstr = strerror(errno);
 498             write(2, "unable to exec ", 15);
 499             write(2, mhlproc, strlen(mhlproc));
 500             write(2, ": ", 2);
 501             write(2, errstr, strlen(errstr));
 502             write(2, "\n", 1);
 503             _exit (-1);
 504
 505         default:
 506             if (pidXwait (pid, mhl))
 507                 done (1);
 508             fseek (out, 0L, SEEK_END);
 509             break;
 510     }
 511 }