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, sizeof(*cptr)))) {
 121                                 cptr->c_name = "encrypted";
 122                                 cptr->c_next = wantcomp[i = CHASH(cptr->c_name)];
 123                                 wantcomp[i] = cptr;
 124                                 ncomps++;
 125                 }
 126                 FINDCOMP(cptr, "dtimenow");
 127                 if (cptr)
 128                         cptr->c_text = getcpy(dtimenow(0));
 129                 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps,
 130                                 sizeof(char *));
 131                 if (nxtbuf == NULL)
 132                         adios(NULL, "unable to allocate component buffers");
 133                 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
 134                         sizeof(struct comp *));
 135                 if (used_buf == NULL)
 136                         adios(NULL, "unable to allocate component buffer stack");
 137                 used_buf += ncomps+1; *--used_buf = 0;
 138                 rlwidth = bodycomp && (width > SBUFSIZ) ? width : SBUFSIZ;
 139                 for (i = ncomps; i--; )
 140                         *nxtbuf++ = mh_xmalloc(rlwidth);
 141         }
 142
 143         /*
 144         ** each-message initialization
 145         */
 146         nxtbuf = compbuffers;
 147         savecomp = used_buf;
 148         tmpbuf = *nxtbuf++;
 149         dat[0] = innum ? innum : outnum;
 150         dat[1] = curflg;
 151         dat[4] = unseen;
 152
 153         /*
 154         ** Get the first field.  If the message is non-empty
 155         ** and we're doing an "inc", open the output file.
 156         */
 157         if ((state = m_getfld(FLD, name, tmpbuf, rlwidth, inb)) == FILEEOF) {
 158                 if (ferror(inb)) {
 159                         advise("read", "unable to"); /* "read error" */
 160                         return SCNFAT;
 161                 } else {
 162                         return SCNEOF;
 163                 }
 164         }
 165
 166         if (outnum) {
 167                 if (outnum > 0) {
 168                         scnmsg = m_name(outnum);
 169                         if (*scnmsg == '?')  /* msg num out of range */
 170                                 return SCNNUM;
 171                 } else {
 172                         scnmsg = "/dev/null";
 173                 }
 174                 if ((scnout = fopen(scnmsg, "w")) == NULL)
 175                         adios(scnmsg, "unable to write");
 176 #ifdef RPATHS
 177                 /*
 178                 ** Add the Return-Path and Delivery-Date
 179                 ** header fields to message.
 180                 */
 181                 if (get_returnpath(returnpath, sizeof(returnpath),
 182                                 deliverydate, sizeof(deliverydate))) {
 183                         FPUTS("Return-Path: ");
 184                         FPUTS(returnpath);
 185                         FPUTS("Delivery-Date: ");
 186                         FPUTS(deliverydate);
 187                 }
 188 #endif /* RPATHS */
 189         }
 190
 191         /* scan - main loop */
 192         for (compnum = 1; ;
 193                         state = m_getfld(state, name, tmpbuf, rlwidth, inb)) {
 194                 switch (state) {
 195                         case FLD:
 196                         case FLDPLUS:
 197                                 compnum++;
 198                                 if (outnum) {
 199                                         FPUTS(name);
 200                                         if (putc(':', scnout) == EOF)
 201                                                 DIEWRERR();
 202                                         FPUTS(tmpbuf);
 203                                 }
 204                                 /*
 205                                 ** if we're interested in this component,
 206                                 ** save a pointer to the component text,
 207                                 ** then start using our next free buffer
 208                                 ** as the component temp buffer (buffer
 209                                 ** switching saves an extra copy of the
 210                                 ** component text).
 211                                 */
 212                                 if ((cptr = wantcomp[CHASH(name)])) {
 213                                         do {
 214                                                 if (!mh_strcasecmp(name, cptr->c_name)) {
 215                                                         if (! cptr->c_text) {
 216                                                                 cptr->c_text = tmpbuf;
 217                                                                 for (cp = tmpbuf + strlen(tmpbuf) - 1;
 218                                                                                 cp >= tmpbuf; cp--)
 219                                                                         if (isspace(*cp))
 220                                                                                 *cp = 0;
 221                                                                         else
 222                                                                                 break;
 223                                                                 *--savecomp = cptr;
 224                                                                 tmpbuf = *nxtbuf++;
 225                                                         }
 226                                                         break;
 227                                                 }
 228                                         } while ((cptr = cptr->c_next));
 229                                 }
 230
 231                                 while (state == FLDPLUS) {
 232                                         state = m_getfld(state, name, tmpbuf,
 233                                                         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)
 297                                                 DIEWRERR();
 298                                         state = BODY;
 299                                         goto body;
 300                                 }
 301                                 /* fall through */
 302
 303                         case FILEEOF:
 304                                 goto finished;
 305
 306                         default:
 307                                 adios(NULL, "getfld() returned %d", state);
 308                 }
 309         }
 310
 311         /*
 312         ** format and output the scan line.
 313         */
 314 finished:
 315         if (ferror(inb)) {
 316                 advise("read", "unable to"); /* "read error" */
 317                 return SCNFAT;
 318         }
 319
 320         /* Save and restore buffer so we don't trash our dynamic pool! */
 321         if (bodycomp) {
 322                 saved_c_text = bodycomp->c_text;
 323                 bodycomp->c_text = tmpbuf;
 324         }
 325
 326         if (size)
 327                 dat[2] = size;
 328         else if (outnum > 0) {
 329                 dat[2] = ftell(scnout);
 330                 if (dat[2] == EOF)
 331                         DIEWRERR();
 332         }
 333
 334         if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
 335                 struct stat st;
 336
 337                 fstat(fileno(inb), &st);
 338                 if (!size && !outnum)
 339                         dat[2] = st.st_size;
 340                 if (datecomp) {
 341                         if (! datecomp->c_text) {
 342                                 if (datecomp->c_tws == NULL)
 343                                         datecomp->c_tws = (struct tws *) calloc((size_t) 1, sizeof(*datecomp->c_tws));
 344                                 if (datecomp->c_tws == NULL)
 345                                         adios(NULL, "unable to allocate tws buffer");
 346                                 *datecomp->c_tws = *dlocaltime((time_t *) &st.st_mtime);
 347                                 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
 348                         } else {
 349                                 datecomp->c_flags &= ~CF_DATEFAB;
 350                         }
 351                 }
 352         }
 353
 354         fmt_scan(fmt, scanl, slwidth, dat);
 355
 356 #if 0
 357         fmt = fmt_scan(fmt, scanl, slwidth, dat);
 358         if (!fmt)
 359                 fmt = fmt_top;  /* reset for old format files */
 360 #endif
 361
 362         if (bodycomp)
 363                 bodycomp->c_text = saved_c_text;
 364
 365         if (noisy)
 366                 fputs(scanl, stdout);
 367
 368         FINDCOMP(cptr, "encrypted");
 369         encrypted = cptr && cptr->c_text;
 370
 371         /* return dynamically allocated buffers to pool */
 372         while ((cptr = *savecomp++)) {
 373                 *--nxtbuf = cptr->c_text;
 374                 cptr->c_text = NULL;
 375         }
 376         *--nxtbuf = tmpbuf;
 377
 378         if (outnum && (ferror(scnout) || fclose(scnout) == EOF))
 379                 DIEWRERR();
 380
 381         return (state != FILEEOF ? SCNERR : encrypted ? SCNENC : SCNMSG);
 382 }
 383
 384 static int
 385 mh_fputs(char *s, FILE *stream)
 386 {
 387         char c;
 388
 389         while ((c = *s++))
 390                 if (putc(c,stream) == EOF )
 391                         return(EOF);
 392         return (0);
 393 }