diplodocus.org Git - nmh/blob - uip/scansbr.c

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