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

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