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

   1
   2 /*
   3  * replsbr.c -- routines to help repl along...
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13 #include <h/addrsbr.h>
  14 #include <h/fmt_scan.h>
  15 #include <sys/file.h>           /* L_SET */
  16 #include <errno.h>
  17
  18 extern short ccto;              /* from repl.c */
  19 extern short cccc;
  20 extern short ccme;
  21 extern short querysw;
  22
  23 static int dftype=0;
  24
  25 static char *badaddrs = NULL;
  26 static char *dfhost = NULL;
  27
  28 static struct mailname mq = { NULL };
  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 *);
  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)
  73 {
  74     register int state, i;
  75     register struct comp *cptr;
  76     register char *tmpbuf;
  77     register char **nxtbuf;
  78     register char **ap;
  79     register struct comp **savecomp;
  80     int char_read = 0, format_len, mask;
  81     char name[NAMESZ], *scanl, *cp;
  82     FILE *out;
  83
  84     mask = umask(~m_gmprot());
  85     if ((out = fopen (drft, "w")) == NULL)
  86         adios (drft, "unable to create");
  87
  88     umask(mask);
  89
  90     /* get new format string */
  91     cp = new_fs (form, NULL, NULL);
  92     format_len = strlen (cp);
  93
  94     /* compile format string */
  95     ncomps = fmt_compile (cp, &fmt) + 1;
  96
  97     if (!(nxtbuf = compbuffers = (char **)
  98             calloc((size_t) ncomps, sizeof(char *))))
  99         adios (NULL, "unable to allocate component buffers");
 100     if (!(savecomp = used_buf = (struct comp **)
 101             calloc((size_t) (ncomps+1), sizeof(struct comp *))))
 102         adios (NULL, "unable to allocate component buffer stack");
 103     savecomp += ncomps + 1;
 104     *--savecomp = NULL;         /* point at zero'd end minus 1 */
 105
 106     for (i = ncomps; i--; )
 107         if (!(*nxtbuf++ = malloc(SBUFSIZ)))
 108             adios (NULL, "unable to allocate component buffer");
 109
 110     nxtbuf = compbuffers;               /* point at start */
 111     tmpbuf = *nxtbuf++;
 112
 113     for (ap = addrcomps; *ap; ap++) {
 114         FINDCOMP (cptr, *ap);
 115         if (cptr)
 116             cptr->c_type |= CT_ADDR;
 117     }
 118
 119     /*
 120      * ignore any components killed by command line switches
 121      */
 122     if (!ccto) {
 123         FINDCOMP (cptr, "to");
 124         if (cptr)
 125             cptr->c_name = "";
 126     }
 127     if (!cccc) {
 128         FINDCOMP (cptr, "cc");
 129         if (cptr)
 130             cptr->c_name = "";
 131     }
 132     /* set up the "fcc" pseudo-component */
 133     if (fcc) {
 134         FINDCOMP (cptr, "fcc");
 135         if (cptr)
 136             cptr->c_text = getcpy (fcc);
 137     }
 138     if ((cp = getenv("USER"))) {
 139         FINDCOMP (cptr, "user");
 140         if (cptr)
 141             cptr->c_text = getcpy(cp);
 142     }
 143     if (!ccme)
 144         ismymbox (NULL);
 145
 146     /*
 147      * pick any interesting stuff out of msg "inb"
 148      */
 149     for (state = FLD;;) {
 150         state = m_getfld (state, name, tmpbuf, SBUFSIZ, inb);
 151         switch (state) {
 152             case FLD:
 153             case FLDPLUS:
 154                 /*
 155                  * if we're interested in this component, save a pointer
 156                  * to the component text, then start using our next free
 157                  * buffer as the component temp buffer (buffer switching
 158                  * saves an extra copy of the component text).
 159                  */
 160                 if ((cptr = wantcomp[CHASH(name)]))
 161                     do {
 162                         if (!strcasecmp(name, cptr->c_name)) {
 163                             char_read += msg_count;
 164                             if (! cptr->c_text) {
 165                                 cptr->c_text = tmpbuf;
 166                                 *--savecomp = cptr;
 167                                 tmpbuf = *nxtbuf++;
 168                             } else {
 169                                 i = strlen (cp = cptr->c_text) - 1;
 170                                 if (cp[i] == '\n') {
 171                                     if (cptr->c_type & CT_ADDR) {
 172                                         cp[i] = '\0';
 173                                         cp = add (",\n\t", cp);
 174                                     } else {
 175                                         cp = add ("\t", cp);
 176                                     }
 177                                 }
 178                                 cptr->c_text = add (tmpbuf, cp);
 179                             }
 180                             while (state == FLDPLUS) {
 181                                 state = m_getfld (state, name, tmpbuf,
 182                                                   SBUFSIZ, inb);
 183                                 cptr->c_text = add (tmpbuf, cptr->c_text);
 184                                 char_read += msg_count;
 185                             }
 186                             break;
 187                         }
 188                     } while ((cptr = cptr->c_next));
 189
 190                 while (state == FLDPLUS)
 191                     state = m_getfld (state, name, tmpbuf, SBUFSIZ, inb);
 192                 break;
 193
 194             case LENERR:
 195             case FMTERR:
 196             case BODY:
 197             case FILEEOF:
 198                 goto finished;
 199
 200             default:
 201                 adios (NULL, "m_getfld() returned %d", state);
 202         }
 203     }
 204
 205     /*
 206      * format and output the header lines.
 207      */
 208 finished:
 209
 210     /*
 211      * if there's a "Subject" component, strip any "Re:"s off it
 212      */
 213     FINDCOMP (cptr, "subject")
 214     if (cptr && (cp = cptr->c_text)) {
 215         register char *sp = cp;
 216
 217         for (;;) {
 218             while (isspace(*cp))
 219                 cp++;
 220             if(uprf(cp, "re:"))
 221                 cp += 3;
 222             else
 223                 break;
 224             sp = cp;
 225         }
 226         if (sp != cptr->c_text) {
 227             cp = cptr->c_text;
 228             cptr->c_text = getcpy (sp);
 229             free (cp);
 230         }
 231     }
 232     i = format_len + char_read + 256;
 233     scanl = malloc ((size_t) i + 2);
 234     dat[0] = 0;
 235     dat[1] = 0;
 236     dat[2] = 0;
 237     dat[3] = outputlinelen;
 238     dat[4] = 0;
 239     fmt_scan (fmt, scanl, i, dat);
 240     fputs (scanl, out);
 241     if (badaddrs) {
 242         fputs ("\nrepl: bad addresses:\n", out);
 243         fputs ( badaddrs, out);
 244     }
 245
 246     /*
 247      * Check if we should filter the message
 248      * or add mhn directives
 249      */
 250     if (filter) {
 251         fflush(out);
 252         if (ferror (out))
 253             adios (drft, "error writing");
 254
 255         replfilter (inb, out, filter);
 256     } else if (mime && mp) {
 257             fprintf (out, "#forw [original message] +%s %s\n",
 258                      mp->foldpath, m_name (mp->lowsel));
 259     }
 260
 261     fflush(out);
 262     if (ferror (out))
 263         adios (drft, "error writing");
 264     fclose (out);
 265
 266     /* return dynamically allocated buffers */
 267     free (scanl);
 268     for (nxtbuf = compbuffers, i = ncomps; (cptr = *savecomp++); nxtbuf++, i--)
 269         free (cptr->c_text);    /* if not nxtbuf, nxtbuf already freed */
 270     while ( i-- > 0)
 271         free (*nxtbuf++);       /* free unused nxtbufs */
 272     free ((char *) compbuffers);
 273     free ((char *) used_buf);
 274 }
 275
 276 static char *buf;               /* our current working buffer */
 277 static char *bufend;            /* end of working buffer */
 278 static char *last_dst;          /* buf ptr at end of last call */
 279 static unsigned int bufsiz=0;   /* current size of buf */
 280
 281 #define BUFINCR 512             /* how much to expand buf when if fills */
 282
 283 #define CPY(s) { cp = (s); while ((*dst++ = *cp++)) ; --dst; }
 284
 285 /*
 286  * check if there's enough room in buf for str.
 287  * add more mem if needed
 288  */
 289 #define CHECKMEM(str) \
 290             if ((len = strlen (str)) >= bufend - dst) {\
 291                 int i = dst - buf;\
 292                 int n = last_dst - buf;\
 293                 bufsiz += ((dst + len - bufend) / BUFINCR + 1) * BUFINCR;\
 294                 buf = realloc (buf, bufsiz);\
 295                 dst = buf + i;\
 296                 last_dst = buf + n;\
 297                 if (! buf)\
 298                     adios (NULL, "formataddr: couldn't get buffer space");\
 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 = malloc (BUFINCR);
 328         if (! buf)
 329             adios (NULL, "formataddr: couldn't allocate buffer space");
 330         last_dst = buf;         /* XXX */
 331         bufsiz = BUFINCR - 6;  /* leave some slop */
 332         bufend = buf + bufsiz;
 333     }
 334     /*
 335      * If "orig" points to our buffer we can just pick up where we
 336      * left off.  Otherwise we have to copy orig into our buffer.
 337      */
 338     if (orig == buf)
 339         dst = last_dst;
 340     else if (!orig || !*orig) {
 341         dst = buf;
 342         *dst = '\0';
 343     } else {
 344         dst = last_dst;         /* XXX */
 345         CHECKMEM (orig);
 346         CPY (orig);
 347     }
 348
 349     /* concatenate all the new addresses onto 'buf' */
 350     for (isgroup = 0; (cp = getname (str)); ) {
 351         if ((mp = getm (cp, dfhost, dftype, AD_NAME, error)) == NULL) {
 352             snprintf (baddr, sizeof(baddr), "\t%s -- %s\n", cp, error);
 353             badaddrs = add (baddr, badaddrs);
 354             continue;
 355         }
 356         if (isgroup && (mp->m_gname || !mp->m_ingrp)) {
 357             *dst++ = ';';
 358             isgroup = 0;
 359         }
 360         if (insert (mp)) {
 361             /* if we get here we're going to add an address */
 362             if (dst != buf) {
 363                 *dst++ = ',';
 364                 *dst++ = ' ';
 365             }
 366             if (mp->m_gname) {
 367                 CHECKMEM (mp->m_gname);
 368                 CPY (mp->m_gname);
 369                 isgroup++;
 370             }
 371             sp = adrformat (mp);
 372             CHECKMEM (sp);
 373             CPY (sp);
 374         }
 375     }
 376
 377     if (isgroup)
 378         *dst++ = ';';
 379
 380     *dst = '\0';
 381     last_dst = dst;
 382     return (buf);
 383 }
 384
 385
 386 static int
 387 insert (struct mailname *np)
 388 {
 389     char buffer[BUFSIZ];
 390     register struct mailname *mp;
 391
 392     if (np->m_mbox == NULL)
 393         return 0;
 394
 395     for (mp = &mq; mp->m_next; mp = mp->m_next) {
 396         if (!strcasecmp (np->m_host, mp->m_next->m_host)
 397                 && !strcasecmp (np->m_mbox, mp->m_next->m_mbox))
 398             return 0;
 399     }
 400     if (!ccme && ismymbox (np))
 401         return 0;
 402
 403     if (querysw) {
 404         snprintf (buffer, sizeof(buffer), "Reply to %s? ", adrformat (np));
 405         if (!gans (buffer, anoyes))
 406         return 0;
 407     }
 408     mp->m_next = np;
 409
 410 #ifdef ISI
 411     if (ismymbox (np))
 412         ccme = 0;
 413 #endif
 414
 415     return 1;
 416 }
 417
 418
 419 /*
 420  * Call the mhlproc
 421  *
 422  * This function expects that argument out has been fflushed by the caller.
 423  */
 424
 425 static void
 426 replfilter (FILE *in, FILE *out, char *filter)
 427 {
 428     int pid;
 429     char *mhl;
 430     char *errstr;
 431
 432     if (filter == NULL)
 433         return;
 434
 435     if (access (filter, R_OK) == NOTOK)
 436         adios (filter, "unable to read");
 437
 438     mhl = r1bindex (mhlproc, '/');
 439
 440     rewind (in);
 441     lseek (fileno(in), (off_t) 0, SEEK_SET);
 442
 443     switch (pid = vfork ()) {
 444         case NOTOK:
 445             adios ("fork", "unable to");
 446
 447         case OK:
 448             dup2 (fileno (in), fileno (stdin));
 449             dup2 (fileno (out), fileno (stdout));
 450             closefds (3);
 451
 452             execlp (mhlproc, mhl, "-form", filter, "-noclear", NULL);
 453             errstr = strerror(errno);
 454             write(2, "unable to exec ", 15);
 455             write(2, mhlproc, strlen(mhlproc));
 456             write(2, ": ", 2);
 457             write(2, errstr, strlen(errstr));
 458             write(2, "\n", 1);
 459             _exit (-1);
 460
 461         default:
 462             if (pidXwait (pid, mhl))
 463                 done (1);
 464             fseek (out, 0L, SEEK_END);
 465             break;
 466     }
 467 }