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