git.marmaro.de Git - mmh/blob - uip/scansbr.c

   1 /*
   2 ** scansbr.c -- routines to help scan along...
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <h/addrsbr.h>
  11 #include <h/fmt_scan.h>
  12 #include <h/scansbr.h>
  13 #include <h/tws.h>
  14 #include <h/utils.h>
  15
  16 #ifdef _FSTDIO
  17 # define _ptr _p  /* Gag */
  18 # define _cnt _w  /* Wretch */
  19 #endif
  20
  21 #ifdef SCO_5_STDIO
  22 # define _ptr  __ptr
  23 # define _cnt  __cnt
  24 # define _base __base
  25 # define _filbuf(fp)  ((fp)->__cnt = 0, __filbuf(fp))
  26 #endif
  27
  28 #define MAXSCANL 256  /* longest possible scan line */
  29
  30 /*
  31 ** Buffer size for content part of header fields.  We want this
  32 ** to be large enough so that we don't do a lot of extra FLDPLUS
  33 ** calls on m_getfld but small enough so that we don't snarf
  34 ** the entire message body when we're only going to display 30
  35 ** characters of it.
  36 */
  37 #define SBUFSIZ 512
  38
  39 static struct format *fmt;
  40 #ifdef JLR
  41 static struct format *fmt_top;
  42 #endif /* JLR */
  43
  44 static struct comp *datecomp;  /* pntr to "date" comp */
  45 static struct comp *bodycomp;  /* pntr to "body" pseudo-comp (if referenced) */
  46 static int ncomps = 0;  /* # of interesting components */
  47 static char **compbuffers = 0;  /* buffers for component text */
  48 static struct comp **used_buf = 0;  /* stack for comp that use buffers */
  49
  50 static int dat[5];  /* aux. data for format routine */
  51
  52 char *scanl = 0;  /* text of most recent scanline */
  53
  54 #define DIEWRERR() adios (scnmsg, "write error on")
  55
  56 #define FPUTS(buf) {\
  57                 if (mh_fputs(buf,scnout) == EOF)\
  58                         DIEWRERR();\
  59         }
  60
  61 /*
  62 ** prototypes
  63 */
  64 int sc_width (void);  /* from termsbr.c */
  65 static int mh_fputs(char *, FILE *);
  66
  67 #ifdef MULTIBYTE_SUPPORT
  68 #define SCAN_CHARWIDTH MB_CUR_MAX
  69 #else
  70 #define SCAN_CHARWIDTH 1
  71 #endif
  72
  73 int
  74 scan (FILE *inb, int innum, int outnum, char *nfs, int width, int curflg,
  75         int unseen, char *folder, long size, int noisy)
  76 {
  77         int i, compnum, encrypted, state;
  78         unsigned char *cp, *tmpbuf;
  79         char **nxtbuf;
  80         char *saved_c_text = NULL;
  81         struct comp *cptr;
  82         struct comp **savecomp;
  83         char *scnmsg = NULL;
  84         FILE *scnout = NULL;
  85         char name[NAMESZ];
  86         static int rlwidth, slwidth;
  87
  88 #ifdef RPATHS
  89         char returnpath[BUFSIZ];
  90         char deliverydate[BUFSIZ];
  91 #endif
  92
  93         /* first-time only initialization */
  94         if (!scanl) {
  95                 if (width == 0) {
  96                         if ((width = sc_width ()) < WIDTH/2)
  97                                 width = WIDTH/2;
  98                         else if (width > MAXSCANL)
  99                                 width = MAXSCANL;
 100                 }
 101                 dat[3] = slwidth = width;
 102                 scanl = (char *) mh_xmalloc((size_t) SCAN_CHARWIDTH *
 103                                 (slwidth + 2) );
 104                 if (outnum)
 105                         umask(~m_gmprot());
 106
 107                 /* Compile format string */
 108                 ncomps = fmt_compile (nfs, &fmt) + 1;
 109
 110 #ifdef JLR
 111                 fmt_top = fmt;
 112 #endif /* JLR */
 113                 FINDCOMP(bodycomp, "body");
 114                 FINDCOMP(datecomp, "date");
 115                 FINDCOMP(cptr, "folder");
 116                 if (cptr && folder)
 117                         cptr->c_text = folder;
 118                 FINDCOMP(cptr, "encrypted");
 119                 if (!cptr)
 120                         if ((cptr = (struct comp *) calloc (1,
 121                                         sizeof(*cptr)))) {
 122                                 cptr->c_name = "encrypted";
 123                                 cptr->c_next = wantcomp[i = CHASH (cptr->c_name)];
 124                                 wantcomp[i] = cptr;
 125                                 ncomps++;
 126                 }
 127                 FINDCOMP (cptr, "dtimenow");
 128                 if (cptr)
 129                         cptr->c_text = getcpy(dtimenow (0));
 130                 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps,
 131                                 sizeof(char *));
 132                 if (nxtbuf == NULL)
 133                         adios (NULL, "unable to allocate component buffers");
 134                 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
 135                         sizeof(struct comp *));
 136                 if (used_buf == NULL)
 137                         adios (NULL, "unable to allocate component buffer stack");
 138                 used_buf += ncomps+1; *--used_buf = 0;
 139                 rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
 140                 for (i = ncomps; i--; )
 141                         *nxtbuf++ = mh_xmalloc(rlwidth);
 142         }
 143
 144         /*
 145         ** each-message initialization
 146         */
 147         nxtbuf = compbuffers;
 148         savecomp = used_buf;
 149         tmpbuf = *nxtbuf++;
 150         dat[0] = innum ? innum : outnum;
 151         dat[1] = curflg;
 152         dat[4] = unseen;
 153
 154         /*
 155         ** Get the first field.  If the message is non-empty
 156         ** and we're doing an "inc", open the output file.
 157         */
 158         if ((state = m_getfld (FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
 159                 if (ferror(inb)) {
 160                         advise("read", "unable to"); /* "read error" */
 161                         return SCNFAT;
 162                 } else {
 163                         return SCNEOF;
 164                 }
 165         }
 166
 167         if (outnum) {
 168                 if (outnum > 0) {
 169                         scnmsg = m_name (outnum);
 170                         if (*scnmsg == '?')  /* msg num out of range */
 171                                 return SCNNUM;
 172                 } else {
 173                         scnmsg = "/dev/null";
 174                 }
 175                 if ((scnout = fopen (scnmsg, "w")) == NULL)
 176                         adios (scnmsg, "unable to write");
 177 #ifdef RPATHS
 178                 /*
 179                 ** Add the Return-Path and Delivery-Date
 180                 ** header fields to message.
 181                 */
 182                 if (get_returnpath (returnpath, sizeof(returnpath),
 183                                 deliverydate, sizeof(deliverydate))) {
 184                         FPUTS ("Return-Path: ");
 185                         FPUTS (returnpath);
 186                         FPUTS ("Delivery-Date: ");
 187                         FPUTS (deliverydate);
 188                 }
 189 #endif /* RPATHS */
 190         }
 191
 192         /* scan - main loop */
 193         for (compnum = 1; ;
 194                         state = m_getfld (state, name, tmpbuf, rlwidth, inb)) {
 195                 switch (state) {
 196                         case FLD:
 197                         case FLDPLUS:
 198                                 compnum++;
 199                                 if (outnum) {
 200                                         FPUTS (name);
 201                                         if ( putc (':', scnout) == EOF)
 202                                                 DIEWRERR();
 203                                         FPUTS (tmpbuf);
 204                                 }
 205                                 /*
 206                                 ** if we're interested in this component,
 207                                 ** save a pointer to the component text,
 208                                 ** then start using our next free buffer
 209                                 ** as the component temp buffer (buffer
 210                                 ** switching saves an extra copy of the
 211                                 ** component text).
 212                                 */
 213                                 if ((cptr = wantcomp[CHASH(name)])) {
 214                                         do {
 215                                                 if (!mh_strcasecmp(name, cptr->c_name)) {
 216                                                         if (! cptr->c_text) {
 217                                                                 cptr->c_text = tmpbuf;
 218                                                                 for (cp = tmpbuf + strlen (tmpbuf) - 1;
 219                                                                                 cp >= tmpbuf; cp--)
 220                                                                         if (isspace (*cp))
 221                                                                                 *cp = 0;
 222                                                                         else
 223                                                                                 break;
 224                                                                 *--savecomp = cptr;
 225                                                                 tmpbuf = *nxtbuf++;
 226                                                         }
 227                                                         break;
 228                                                 }
 229                                         } while ((cptr = cptr->c_next));
 230                                 }
 231
 232                                 while (state == FLDPLUS) {
 233                                         state = m_getfld (state, name, tmpbuf, rlwidth, inb);
 234                                         if (outnum)
 235                                                 FPUTS (tmpbuf);
 236                                 }
 237                                 break;
 238
 239                         case BODY:
 240                                 compnum = -1;
 241                                 if (! outnum) {
 242                                         state = FILEEOF; /* stop now if scan cmd */
 243                                         goto finished;
 244                                 }
 245                                 if (putc ('\n', scnout) == EOF) DIEWRERR();
 246                                 FPUTS (tmpbuf);
 247                                 /*
 248                                 ** performance hack: some people like to
 249                                 ** run "inc" on things like net.sources or
 250                                 ** large digests.  We do a copy directly
 251                                 ** into the output buffer rather than
 252                                 ** going through an intermediate buffer.
 253                                 **
 254                                 ** We need the amount of data m_getfld
 255                                 ** found & don't want to do a strlen on
 256                                 ** the long buffer so there's a hack in
 257                                 ** m_getfld to save the amount of data it
 258                                 ** returned in the global "msg_count".
 259                                 */
 260 body:;
 261                                 while (state == BODY) {
 262 #ifdef LINUX_STDIO
 263                                         if (scnout->_IO_write_ptr == scnout->_IO_write_end) {
 264 #elif defined(__DragonFly__)
 265                                         if (((struct __FILE_public *)scnout)->_w <= 0) {
 266 #else
 267                                         if (scnout->_cnt <= 0) {
 268 #endif
 269                                                 if (fflush(scnout) == EOF)
 270                                                         DIEWRERR ();
 271                                         }
 272 #ifdef LINUX_STDIO
 273                                         state = m_getfld(state, name, scnout->_IO_write_ptr,
 274                                                 (long)scnout->_IO_write_ptr-(long)scnout->_IO_write_end , inb);
 275                                         scnout->_IO_write_ptr += msg_count;
 276 #elif defined(__DragonFly__)
 277                                         state = m_getfld( state, name, ((struct __FILE_public *)scnout)->_p, -(((struct __FILE_public *)scnout)->_w), inb );
 278                                         ((struct __FILE_public *)scnout)->_w -= msg_count;
 279                                         ((struct __FILE_public *)scnout)->_p += msg_count;
 280 #else
 281                                         state = m_getfld( state, name, scnout->_ptr, -(scnout->_cnt), inb );
 282                                         scnout->_cnt -= msg_count;
 283                                         scnout->_ptr += msg_count;
 284 #endif
 285                                 }
 286                                 goto finished;
 287
 288                         case LENERR:
 289                         case FMTERR:
 290                                 fprintf (stderr, innum ? "??Format error (message %d) in " : "??Format error in ", outnum ? outnum : innum);
 291                                 fprintf (stderr, "component %d\n", compnum);
 292
 293                                 if (outnum) {
 294                                         FPUTS ("\n\nBAD MSG:\n");
 295                                         FPUTS (name);
 296                                         if (putc ('\n', scnout) == EOF) DIEWRERR();
 297                                         state = BODY;
 298                                         goto body;
 299                                 }
 300                                 /* fall through */
 301
 302                         case FILEEOF:
 303                                 goto finished;
 304
 305                         default:
 306                                 adios (NULL, "getfld() returned %d", state);
 307                 }
 308         }
 309
 310         /*
 311         ** format and output the scan line.
 312         */
 313 finished:
 314         if (ferror(inb)) {
 315                 advise("read", "unable to"); /* "read error" */
 316                 return SCNFAT;
 317         }
 318
 319         /* Save and restore buffer so we don't trash our dynamic pool! */
 320         if (bodycomp) {
 321                 saved_c_text = bodycomp->c_text;
 322                 bodycomp->c_text = tmpbuf;
 323         }
 324
 325         if (size)
 326                 dat[2] = size;
 327         else if (outnum > 0) {
 328                 dat[2] = ftell(scnout);
 329                 if (dat[2] == EOF) DIEWRERR();
 330         }
 331
 332         if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
 333                 struct stat st;
 334
 335                 fstat (fileno(inb), &st);
 336                 if (!size && !outnum)
 337                         dat[2] = st.st_size;
 338                 if (datecomp) {
 339                         if (! datecomp->c_text) {
 340                                 if (datecomp->c_tws == NULL)
 341                                         datecomp->c_tws = (struct tws *)
 342                                                 calloc((size_t) 1, sizeof(*datecomp->c_tws));
 343                                 if (datecomp->c_tws == NULL)
 344                                         adios (NULL, "unable to allocate tws buffer");
 345                                 *datecomp->c_tws = *dlocaltime ((time_t *) &st.st_mtime);
 346                                 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
 347                         } else {
 348                                 datecomp->c_flags &= ~CF_DATEFAB;
 349                         }
 350                 }
 351         }
 352
 353         fmt_scan (fmt, scanl, slwidth, dat);
 354
 355 #if 0
 356         fmt = fmt_scan (fmt, scanl, slwidth, dat);
 357         if (!fmt)
 358                 fmt = fmt_top;  /* reset for old format files */
 359 #endif
 360
 361         if (bodycomp)
 362                 bodycomp->c_text = saved_c_text;
 363
 364         if (noisy)
 365                 fputs (scanl, stdout);
 366
 367         FINDCOMP (cptr, "encrypted");
 368         encrypted = cptr && cptr->c_text;
 369
 370         /* return dynamically allocated buffers to pool */
 371         while ((cptr = *savecomp++)) {
 372                 *--nxtbuf = cptr->c_text;
 373                 cptr->c_text = NULL;
 374         }
 375         *--nxtbuf = tmpbuf;
 376
 377         if (outnum && (ferror(scnout) || fclose (scnout) == EOF))
 378                 DIEWRERR();
 379
 380         return (state != FILEEOF ? SCNERR : encrypted ? SCNENC : SCNMSG);
 381 }
 382
 383 static int
 384 mh_fputs(char *s, FILE *stream)
 385 {
 386         char c;
 387
 388         while ((c = *s++))
 389                 if (putc (c,stream) == EOF )
 390                         return(EOF);
 391         return (0);
 392 }