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, mask;
  80     char name[NAMESZ], *scanl, *cp;
  81     FILE *out;
  82
  83     mask = umask(~m_gmprot());
  84     if ((out = fopen (drft, "w")) == NULL)
  85         adios (drft, "unable to create");
  86
  87     umask(mask);
  88
  89     /* get new format string */
  90     cp = new_fs (form, NULL, NULL);
  91     format_len = strlen (cp);
  92
  93     /* compile format string */
  94     ncomps = fmt_compile (cp, &fmt) + 1;
  95
  96     if (!(nxtbuf = compbuffers = (char **)
  97             calloc((size_t) ncomps, sizeof(char *))))
  98         adios (NULL, "unable to allocate component buffers");
  99     if (!(savecomp = used_buf = (struct comp **)
 100             calloc((size_t) (ncomps+1), sizeof(struct comp *))))
 101         adios (NULL, "unable to allocate component buffer stack");
 102     savecomp += ncomps + 1;
 103     *--savecomp = NULL;         /* point at zero'd end minus 1 */
 104
 105     for (i = ncomps; i--; )
 106         if (!(*nxtbuf++ = malloc(SBUFSIZ)))
 107             adios (NULL, "unable to allocate component buffer");
 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 (!strcasecmp(name, cptr->c_name)) {
 162                             char_read += msg_count;
 163                             if (! cptr->c_text) {
 164                                 cptr->c_text = tmpbuf;
 165                                 *--savecomp = cptr;
 166                                 tmpbuf = *nxtbuf++;
 167                             } else {
 168                                 i = strlen (cp = cptr->c_text) - 1;
 169                                 if (cp[i] == '\n') {
 170                                     if (cptr->c_type & CT_ADDR) {
 171                                         cp[i] = '\0';
 172                                         cp = add (",\n\t", cp);
 173                                     } else {
 174                                         cp = add ("\t", cp);
 175                                     }
 176                                 }
 177                                 cptr->c_text = add (tmpbuf, cp);
 178                             }
 179                             while (state == FLDPLUS) {
 180                                 state = m_getfld (state, name, tmpbuf,
 181                                                   SBUFSIZ, inb);
 182                                 cptr->c_text = add (tmpbuf, cptr->c_text);
 183                                 char_read += msg_count;
 184                             }
 185                             break;
 186                         }
 187                     } while ((cptr = cptr->c_next));
 188
 189                 while (state == FLDPLUS)
 190                     state = m_getfld (state, name, tmpbuf, SBUFSIZ, inb);
 191                 break;
 192
 193             case LENERR:
 194             case FMTERR:
 195             case BODY:
 196             case FILEEOF:
 197                 goto finished;
 198
 199             default:
 200                 adios (NULL, "m_getfld() returned %d", state);
 201         }
 202     }
 203
 204     /*
 205      * format and output the header lines.
 206      */
 207 finished:
 208
 209     /*
 210      * if there's a "Subject" component, strip any "Re:"s off it
 211      */
 212     FINDCOMP (cptr, "subject")
 213     if (cptr && (cp = cptr->c_text)) {
 214         register char *sp = cp;
 215
 216         for (;;) {
 217             while (isspace(*cp))
 218                 cp++;
 219             if(uprf(cp, "re:"))
 220                 cp += 3;
 221             else
 222                 break;
 223             sp = cp;
 224         }
 225         if (sp != cptr->c_text) {
 226             cp = cptr->c_text;
 227             cptr->c_text = getcpy (sp);
 228             free (cp);
 229         }
 230     }
 231     i = format_len + char_read + 256;
 232     scanl = malloc ((size_t) i + 2);
 233     dat[0] = 0;
 234     dat[1] = 0;
 235     dat[2] = 0;
 236     dat[3] = outputlinelen;
 237     dat[4] = 0;
 238     fmt_scan (fmt, scanl, i, dat);
 239     fputs (scanl, out);
 240     if (badaddrs) {
 241         fputs ("\nrepl: bad addresses:\n", out);
 242         fputs ( badaddrs, out);
 243     }
 244
 245     /*
 246      * Check if we should filter the message
 247      * or add mhn directives
 248      */
 249     if (filter) {
 250         replfilter (inb, out, filter);
 251     } else if (mime && mp) {
 252             fprintf (out, "#forw [original message] +%s %s\n",
 253                      mp->foldpath, m_name (mp->lowsel));
 254     }
 255
 256     if (ferror (out))
 257         adios (drft, "error writing");
 258     fclose (out);
 259
 260     /* return dynamically allocated buffers */
 261     free (scanl);
 262     for (nxtbuf = compbuffers, i = ncomps; (cptr = *savecomp++); nxtbuf++, i--)
 263         free (cptr->c_text);    /* if not nxtbuf, nxtbuf already freed */
 264     while ( i-- > 0)
 265         free (*nxtbuf++);       /* free unused nxtbufs */
 266     free ((char *) compbuffers);
 267     free ((char *) used_buf);
 268 }
 269
 270 static char *buf;               /* our current working buffer */
 271 static char *bufend;            /* end of working buffer */
 272 static char *last_dst;          /* buf ptr at end of last call */
 273 static unsigned int bufsiz=0;   /* current size of buf */
 274
 275 #define BUFINCR 512             /* how much to expand buf when if fills */
 276
 277 #define CPY(s) { cp = (s); while ((*dst++ = *cp++)) ; --dst; }
 278
 279 /*
 280  * check if there's enough room in buf for str.
 281  * add more mem if needed
 282  */
 283 #define CHECKMEM(str) \
 284             if ((len = strlen (str)) >= bufend - dst) {\
 285                 int i = dst - buf;\
 286                 int n = last_dst - buf;\
 287                 bufsiz += ((dst + len - bufend) / BUFINCR + 1) * BUFINCR;\
 288                 buf = realloc (buf, bufsiz);\
 289                 dst = buf + i;\
 290                 last_dst = buf + n;\
 291                 if (! buf)\
 292                     adios (NULL, "formataddr: couldn't get buffer space");\
 293                 bufend = buf + bufsiz;\
 294             }
 295
 296
 297 /*
 298  * fmt_scan will call this routine if the user includes the function
 299  * "(formataddr {component})" in a format string.  "orig" is the
 300  * original contents of the string register.  "str" is the address
 301  * string to be formatted and concatenated onto orig.  This routine
 302  * returns a pointer to the concatenated address string.
 303  *
 304  * We try to not do a lot of malloc/copy/free's (which is why we
 305  * don't call "getcpy") but still place no upper limit on the
 306  * length of the result string.
 307  */
 308 char *
 309 formataddr (char *orig, char *str)
 310 {
 311     register int len;
 312     char baddr[BUFSIZ], error[BUFSIZ];
 313     register int isgroup;
 314     register char *dst;
 315     register char *cp;
 316     register char *sp;
 317     register struct mailname *mp = NULL;
 318
 319     /* if we don't have a buffer yet, get one */
 320     if (bufsiz == 0) {
 321         buf = malloc (BUFINCR);
 322         if (! buf)
 323             adios (NULL, "formataddr: couldn't allocate buffer space");
 324         last_dst = buf;         /* XXX */
 325         bufsiz = BUFINCR - 6;  /* leave some slop */
 326         bufend = buf + bufsiz;
 327     }
 328     /*
 329      * If "orig" points to our buffer we can just pick up where we
 330      * left off.  Otherwise we have to copy orig into our buffer.
 331      */
 332     if (orig == buf)
 333         dst = last_dst;
 334     else if (!orig || !*orig) {
 335         dst = buf;
 336         *dst = '\0';
 337     } else {
 338         dst = last_dst;         /* XXX */
 339         CHECKMEM (orig);
 340         CPY (orig);
 341     }
 342
 343     /* concatenate all the new addresses onto 'buf' */
 344     for (isgroup = 0; (cp = getname (str)); ) {
 345         if ((mp = getm (cp, dfhost, dftype, AD_NAME, error)) == NULL) {
 346             snprintf (baddr, sizeof(baddr), "\t%s -- %s\n", cp, error);
 347             badaddrs = add (baddr, badaddrs);
 348             continue;
 349         }
 350         if (isgroup && (mp->m_gname || !mp->m_ingrp)) {
 351             *dst++ = ';';
 352             isgroup = 0;
 353         }
 354         if (insert (mp)) {
 355             /* if we get here we're going to add an address */
 356             if (dst != buf) {
 357                 *dst++ = ',';
 358                 *dst++ = ' ';
 359             }
 360             if (mp->m_gname) {
 361                 CHECKMEM (mp->m_gname);
 362                 CPY (mp->m_gname);
 363                 isgroup++;
 364             }
 365             sp = adrformat (mp);
 366             CHECKMEM (sp);
 367             CPY (sp);
 368         }
 369     }
 370
 371     if (isgroup)
 372         *dst++ = ';';
 373
 374     *dst = '\0';
 375     last_dst = dst;
 376     return (buf);
 377 }
 378
 379
 380 static int
 381 insert (struct mailname *np)
 382 {
 383     char buffer[BUFSIZ];
 384     register struct mailname *mp;
 385
 386     if (np->m_mbox == NULL)
 387         return 0;
 388
 389     for (mp = &mq; mp->m_next; mp = mp->m_next) {
 390         if (!strcasecmp (np->m_host, mp->m_next->m_host)
 391                 && !strcasecmp (np->m_mbox, mp->m_next->m_mbox))
 392             return 0;
 393     }
 394     if (!ccme && ismymbox (np))
 395         return 0;
 396
 397     if (querysw) {
 398         snprintf (buffer, sizeof(buffer), "Reply to %s? ", adrformat (np));
 399         if (!gans (buffer, anoyes))
 400         return 0;
 401     }
 402     mp->m_next = np;
 403
 404 #ifdef ISI
 405     if (ismymbox (np))
 406         ccme = 0;
 407 #endif
 408
 409     return 1;
 410 }
 411
 412
 413 /*
 414  * Call the mhlproc
 415  */
 416
 417 static void
 418 replfilter (FILE *in, FILE *out, char *filter)
 419 {
 420     int pid;
 421     char *mhl;
 422
 423     if (filter == NULL)
 424         return;
 425
 426     if (access (filter, R_OK) == NOTOK)
 427         adios (filter, "unable to read");
 428
 429     mhl = r1bindex (mhlproc, '/');
 430
 431     rewind (in);
 432     lseek (fileno(in), (off_t) 0, SEEK_SET);
 433     fflush (out);
 434
 435     switch (pid = vfork ()) {
 436         case NOTOK:
 437             adios ("fork", "unable to");
 438
 439         case OK:
 440             dup2 (fileno (in), fileno (stdin));
 441             dup2 (fileno (out), fileno (stdout));
 442             closefds (3);
 443
 444             execlp (mhlproc, mhl, "-form", filter, "-noclear", NULL);
 445             fprintf (stderr, "unable to exec ");
 446             perror (mhlproc);
 447             _exit (-1);
 448
 449         default:
 450             if (pidXwait (pid, mhl))
 451                 done (1);
 452             fseek (out, 0L, SEEK_END);
 453             break;
 454     }
 455 }