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
  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;
  80     char name[NAMESZ], *scanl, *cp;
  81     FILE *out;
  82
  83     umask(~m_gmprot());
  84     if ((out = fopen (drft, "w")) == NULL)
  85         adios (drft, "unable to create");
  86
  87     /* get new format string */
  88     cp = new_fs (form, NULL, NULL);
  89     format_len = strlen (cp);
  90
  91     /* compile format string */
  92     ncomps = fmt_compile (cp, &fmt) + 1;
  93
  94     if (!(nxtbuf = compbuffers = (char **)
  95             calloc((size_t) ncomps, sizeof(char *))))
  96         adios (NULL, "unable to allocate component buffers");
  97     if (!(savecomp = used_buf = (struct comp **)
  98             calloc((size_t) (ncomps+1), sizeof(struct comp *))))
  99         adios (NULL, "unable to allocate component buffer stack");
 100     savecomp += ncomps + 1;
 101     *--savecomp = NULL;         /* point at zero'd end minus 1 */
 102
 103     for (i = ncomps; i--; )
 104         if (!(*nxtbuf++ = malloc(SBUFSIZ)))
 105             adios (NULL, "unable to allocate component buffer");
 106
 107     nxtbuf = compbuffers;               /* point at start */
 108     tmpbuf = *nxtbuf++;
 109
 110     for (ap = addrcomps; *ap; ap++) {
 111         FINDCOMP (cptr, *ap);
 112         if (cptr)
 113             cptr->c_type |= CT_ADDR;
 114     }
 115
 116     /*
 117      * ignore any components killed by command line switches
 118      */
 119     if (!ccto) {
 120         FINDCOMP (cptr, "to");
 121         if (cptr)
 122             cptr->c_name = "";
 123     }
 124     if (!cccc) {
 125         FINDCOMP (cptr, "cc");
 126         if (cptr)
 127             cptr->c_name = "";
 128     }
 129     /* set up the "fcc" pseudo-component */
 130     if (fcc) {
 131         FINDCOMP (cptr, "fcc");
 132         if (cptr)
 133             cptr->c_text = getcpy (fcc);
 134     }
 135     if ((cp = getenv("USER"))) {
 136         FINDCOMP (cptr, "user");
 137         if (cptr)
 138             cptr->c_text = getcpy(cp);
 139     }
 140     if (!ccme)
 141         ismymbox (NULL);
 142
 143     /*
 144      * pick any interesting stuff out of msg "inb"
 145      */
 146     for (state = FLD;;) {
 147         state = m_getfld (state, name, tmpbuf, SBUFSIZ, inb);
 148         switch (state) {
 149             case FLD:
 150             case FLDPLUS:
 151                 /*
 152                  * if we're interested in this component, save a pointer
 153                  * to the component text, then start using our next free
 154                  * buffer as the component temp buffer (buffer switching
 155                  * saves an extra copy of the component text).
 156                  */
 157                 if ((cptr = wantcomp[CHASH(name)]))
 158                     do {
 159                         if (!strcasecmp(name, cptr->c_name)) {
 160                             char_read += msg_count;
 161                             if (! cptr->c_text) {
 162                                 cptr->c_text = tmpbuf;
 163                                 *--savecomp = cptr;
 164                                 tmpbuf = *nxtbuf++;
 165                             } else {
 166                                 i = strlen (cp = cptr->c_text) - 1;
 167                                 if (cp[i] == '\n') {
 168                                     if (cptr->c_type & CT_ADDR) {
 169                                         cp[i] = '\0';
 170                                         cp = add (",\n\t", cp);
 171                                     } else {
 172                                         cp = add ("\t", cp);
 173                                     }
 174                                 }
 175                                 cptr->c_text = add (tmpbuf, cp);
 176                             }
 177                             while (state == FLDPLUS) {
 178                                 state = m_getfld (state, name, tmpbuf,
 179                                                   SBUFSIZ, inb);
 180                                 cptr->c_text = add (tmpbuf, cptr->c_text);
 181                                 char_read += msg_count;
 182                             }
 183                             break;
 184                         }
 185                     } while ((cptr = cptr->c_next));
 186
 187                 while (state == FLDPLUS)
 188                     state = m_getfld (state, name, tmpbuf, SBUFSIZ, inb);
 189                 break;
 190
 191             case LENERR:
 192             case FMTERR:
 193             case BODY:
 194             case FILEEOF:
 195                 goto finished;
 196
 197             default:
 198                 adios (NULL, "m_getfld() returned %d", state);
 199         }
 200     }
 201
 202     /*
 203      * format and output the header lines.
 204      */
 205 finished:
 206
 207     /*
 208      * if there's a "Subject" component, strip any "Re:"s off it
 209      */
 210     FINDCOMP (cptr, "subject")
 211     if (cptr && (cp = cptr->c_text)) {
 212         register char *sp = cp;
 213
 214         for (;;) {
 215             while (isspace(*cp))
 216                 cp++;
 217             if(uprf(cp, "re:"))
 218                 cp += 3;
 219             else
 220                 break;
 221             sp = cp;
 222         }
 223         if (sp != cptr->c_text) {
 224             cp = cptr->c_text;
 225             cptr->c_text = getcpy (sp);
 226             free (cp);
 227         }
 228     }
 229     i = format_len + char_read + 256;
 230     scanl = malloc ((size_t) i + 2);
 231     dat[0] = 0;
 232     dat[1] = 0;
 233     dat[2] = 0;
 234     dat[3] = outputlinelen;
 235     dat[4] = 0;
 236     fmt_scan (fmt, scanl, i, dat);
 237     fputs (scanl, out);
 238     if (badaddrs) {
 239         fputs ("\nrepl: bad addresses:\n", out);
 240         fputs ( badaddrs, out);
 241     }
 242
 243     /*
 244      * Check if we should filter the message
 245      * or add mhn directives
 246      */
 247     if (filter) {
 248         replfilter (inb, out, filter);
 249     } else if (mime && mp) {
 250             fprintf (out, "#forw [original message] +%s %s\n",
 251                      mp->foldpath, m_name (mp->lowsel));
 252     }
 253
 254     if (ferror (out))
 255         adios (drft, "error writing");
 256     fclose (out);
 257
 258     /* return dynamically allocated buffers */
 259     free (scanl);
 260     for (nxtbuf = compbuffers, i = ncomps; (cptr = *savecomp++); nxtbuf++, i--)
 261         free (cptr->c_text);    /* if not nxtbuf, nxtbuf already freed */
 262     while ( i-- > 0)
 263         free (*nxtbuf++);       /* free unused nxtbufs */
 264     free ((char *) compbuffers);
 265     free ((char *) used_buf);
 266 }
 267
 268 static char *buf;               /* our current working buffer */
 269 static char *bufend;            /* end of working buffer */
 270 static char *last_dst;          /* buf ptr at end of last call */
 271 static unsigned int bufsiz=0;   /* current size of buf */
 272
 273 #define BUFINCR 512             /* how much to expand buf when if fills */
 274
 275 #define CPY(s) { cp = (s); while ((*dst++ = *cp++)) ; --dst; }
 276
 277 /*
 278  * check if there's enough room in buf for str.
 279  * add more mem if needed
 280  */
 281 #define CHECKMEM(str) \
 282             if ((len = strlen (str)) >= bufend - dst) {\
 283                 int i = dst - buf;\
 284                 int n = last_dst - buf;\
 285                 bufsiz += ((dst + len - bufend) / BUFINCR + 1) * BUFINCR;\
 286                 buf = realloc (buf, bufsiz);\
 287                 dst = buf + i;\
 288                 last_dst = buf + n;\
 289                 if (! buf)\
 290                     adios (NULL, "formataddr: couldn't get buffer space");\
 291                 bufend = buf + bufsiz;\
 292             }
 293
 294
 295 /*
 296  * fmt_scan will call this routine if the user includes the function
 297  * "(formataddr {component})" in a format string.  "orig" is the
 298  * original contents of the string register.  "str" is the address
 299  * string to be formatted and concatenated onto orig.  This routine
 300  * returns a pointer to the concatenated address string.
 301  *
 302  * We try to not do a lot of malloc/copy/free's (which is why we
 303  * don't call "getcpy") but still place no upper limit on the
 304  * length of the result string.
 305  */
 306 char *
 307 formataddr (char *orig, char *str)
 308 {
 309     register int len;
 310     char baddr[BUFSIZ], error[BUFSIZ];
 311     register int isgroup;
 312     register char *dst;
 313     register char *cp;
 314     register char *sp;
 315     register struct mailname *mp = NULL;
 316
 317     /* if we don't have a buffer yet, get one */
 318     if (bufsiz == 0) {
 319         buf = malloc (BUFINCR);
 320         if (! buf)
 321             adios (NULL, "formataddr: couldn't allocate buffer space");
 322         last_dst = buf;         /* XXX */
 323         bufsiz = BUFINCR - 6;  /* leave some slop */
 324         bufend = buf + bufsiz;
 325     }
 326     /*
 327      * If "orig" points to our buffer we can just pick up where we
 328      * left off.  Otherwise we have to copy orig into our buffer.
 329      */
 330     if (orig == buf)
 331         dst = last_dst;
 332     else if (!orig || !*orig) {
 333         dst = buf;
 334         *dst = '\0';
 335     } else {
 336         dst = last_dst;         /* XXX */
 337         CHECKMEM (orig);
 338         CPY (orig);
 339     }
 340
 341     /* concatenate all the new addresses onto 'buf' */
 342     for (isgroup = 0; (cp = getname (str)); ) {
 343         if ((mp = getm (cp, dfhost, dftype, AD_NAME, error)) == NULL) {
 344             snprintf (baddr, sizeof(baddr), "\t%s -- %s\n", cp, error);
 345             badaddrs = add (baddr, badaddrs);
 346             continue;
 347         }
 348         if (isgroup && (mp->m_gname || !mp->m_ingrp)) {
 349             *dst++ = ';';
 350             isgroup = 0;
 351         }
 352         if (insert (mp)) {
 353             /* if we get here we're going to add an address */
 354             if (dst != buf) {
 355                 *dst++ = ',';
 356                 *dst++ = ' ';
 357             }
 358             if (mp->m_gname) {
 359                 CHECKMEM (mp->m_gname);
 360                 CPY (mp->m_gname);
 361                 isgroup++;
 362             }
 363             sp = adrformat (mp);
 364             CHECKMEM (sp);
 365             CPY (sp);
 366         }
 367     }
 368
 369     if (isgroup)
 370         *dst++ = ';';
 371
 372     *dst = '\0';
 373     last_dst = dst;
 374     return (buf);
 375 }
 376
 377
 378 static int
 379 insert (struct mailname *np)
 380 {
 381     char buffer[BUFSIZ];
 382     register struct mailname *mp;
 383
 384     if (np->m_mbox == NULL)
 385         return 0;
 386
 387     for (mp = &mq; mp->m_next; mp = mp->m_next) {
 388         if (!strcasecmp (np->m_host, mp->m_next->m_host)
 389                 && !strcasecmp (np->m_mbox, mp->m_next->m_mbox))
 390             return 0;
 391     }
 392     if (!ccme && ismymbox (np))
 393         return 0;
 394
 395     if (querysw) {
 396         snprintf (buffer, sizeof(buffer), "Reply to %s? ", adrformat (np));
 397         if (!gans (buffer, anoyes))
 398         return 0;
 399     }
 400     mp->m_next = np;
 401
 402 #ifdef ISI
 403     if (ismymbox (np))
 404         ccme = 0;
 405 #endif
 406
 407     return 1;
 408 }
 409
 410
 411 /*
 412  * Call the mhlproc
 413  */
 414
 415 static void
 416 replfilter (FILE *in, FILE *out, char *filter)
 417 {
 418     int pid;
 419     char *mhl;
 420
 421     if (filter == NULL)
 422         return;
 423
 424     if (access (filter, R_OK) == NOTOK)
 425         adios (filter, "unable to read");
 426
 427     mhl = r1bindex (mhlproc, '/');
 428
 429     rewind (in);
 430     lseek (fileno(in), (off_t) 0, SEEK_SET);
 431     fflush (out);
 432
 433     switch (pid = vfork ()) {
 434         case NOTOK:
 435             adios ("fork", "unable to");
 436
 437         case OK:
 438             dup2 (fileno (in), fileno (stdin));
 439             dup2 (fileno (out), fileno (stdout));
 440             closefds (3);
 441
 442             execlp (mhlproc, mhl, "-form", filter, "-noclear", NULL);
 443             fprintf (stderr, "unable to exec ");
 444             perror (mhlproc);
 445             _exit (-1);
 446
 447         default:
 448             if (pidXwait (pid, mhl))
 449                 done (1);
 450             fseek (out, 0L, SEEK_END);
 451             break;
 452     }
 453 }