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