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.
  34 */
  35 #define SBUFSIZ 512
  36
  37 static struct format *fmt;
  38
  39 static struct comp *datecomp;  /* pntr to "date" comp */
  40 static int ncomps = 0;  /* # of interesting components */
  41 static char **compbuffers = 0;  /* buffers for component text */
  42 static struct comp **used_buf = 0;  /* stack for comp that use buffers */
  43
  44 static int dat[5];  /* aux. data for format routine */
  45
  46 char *scanl = 0;  /* text of most recent scanline */
  47
  48 #define DIEWRERR() adios(scnmsg, "write error on")
  49
  50 #define FPUTS(buf) {\
  51                 if (mh_fputs(buf,scnout) == EOF)\
  52                         DIEWRERR();\
  53         }
  54
  55 /*
  56 ** prototypes
  57 */
  58 int sc_width(void);  /* from termsbr.c */
  59 static int mh_fputs(char *, FILE *);
  60
  61 #ifdef MULTIBYTE_SUPPORT
  62 #define SCAN_CHARWIDTH MB_CUR_MAX
  63 #else
  64 #define SCAN_CHARWIDTH 1
  65 #endif
  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         unsigned char *cp, *tmpbuf;
  73         char **nxtbuf;
  74         struct comp *cptr;
  75         struct comp **savecomp;
  76         char *scnmsg = NULL;
  77         FILE *scnout = NULL;
  78         char name[NAMESZ];
  79         static int 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                 scanl = (char *) mh_xmalloc((size_t) SCAN_CHARWIDTH *
  96                                 (slwidth + 2) );
  97                 if (outnum)
  98                         umask(~m_gmprot());
  99
 100                 /* Compile format string */
 101                 ncomps = fmt_compile(nfs, &fmt) + 1;
 102
 103                 FINDCOMP(datecomp, "date");
 104                 FINDCOMP(cptr, "folder");
 105                 if (cptr && folder)
 106                         cptr->c_text = folder;
 107                 FINDCOMP(cptr, "encrypted");
 108                 if (!cptr)
 109                         if ((cptr = (struct comp *)calloc(1, sizeof(*cptr)))) {
 110                                 cptr->c_name = "encrypted";
 111                                 cptr->c_next = wantcomp[i=CHASH(cptr->c_name)];
 112                                 wantcomp[i] = cptr;
 113                                 ncomps++;
 114                 }
 115                 FINDCOMP(cptr, "dtimenow");
 116                 if (cptr)
 117                         cptr->c_text = getcpy(dtimenow(0));
 118                 nxtbuf = compbuffers = (char **) calloc((size_t) ncomps,
 119                                 sizeof(char *));
 120                 if (nxtbuf == NULL)
 121                         adios(NULL, "unable to allocate component buffers");
 122                 used_buf = (struct comp **) calloc((size_t) (ncomps+1),
 123                         sizeof(struct comp *));
 124                 if (used_buf == NULL)
 125                         adios(NULL, "unable to allocate component buffer stack");
 126                 used_buf += ncomps+1; *--used_buf = 0;
 127                 for (i = ncomps; i--; )
 128                         *nxtbuf++ = mh_xmalloc(SBUFSIZ);
 129         }
 130
 131         /*
 132         ** each-message initialization
 133         */
 134         nxtbuf = compbuffers;
 135         savecomp = used_buf;
 136         tmpbuf = *nxtbuf++;
 137         dat[0] = innum ? innum : outnum;
 138         dat[1] = curflg;
 139         dat[4] = unseen;
 140
 141         /*
 142         ** Get the first field.  If the message is non-empty
 143         ** and we're doing an "inc", open the output file.
 144         */
 145         if ((state = m_getfld(FLD, name, tmpbuf, SBUFSIZ, inb)) == FILEEOF) {
 146                 if (ferror(inb)) {
 147                         advise("read", "unable to"); /* "read error" */
 148                         return SCNFAT;
 149                 } else {
 150                         return SCNEOF;
 151                 }
 152         }
 153
 154         if (outnum) {
 155                 if (outnum > 0) {
 156                         scnmsg = m_name(outnum);
 157                         if (*scnmsg == '?')  /* msg num out of range */
 158                                 return SCNNUM;
 159                 } else {
 160                         scnmsg = "/dev/null";
 161                 }
 162                 if ((scnout = fopen(scnmsg, "w")) == NULL)
 163                         adios(scnmsg, "unable to write");
 164 #ifdef RPATHS
 165                 /*
 166                 ** Add the Return-Path and Delivery-Date
 167                 ** header fields to message.
 168                 */
 169                 if (get_returnpath(returnpath, sizeof(returnpath),
 170                                 deliverydate, sizeof(deliverydate))) {
 171                         FPUTS("Return-Path: ");
 172                         FPUTS(returnpath);
 173                         FPUTS("Delivery-Date: ");
 174                         FPUTS(deliverydate);
 175                 }
 176 #endif /* RPATHS */
 177         }
 178
 179         /* scan - main loop */
 180         for (compnum = 1; ;
 181                         state = m_getfld(state, name, tmpbuf, SBUFSIZ, inb)) {
 182                 switch (state) {
 183                 case FLD:
 184                 case FLDPLUS:
 185                         compnum++;
 186                         if (outnum) {
 187                                 FPUTS(name);
 188                                 if (putc(':', scnout) == EOF)
 189                                         DIEWRERR();
 190                                 FPUTS(tmpbuf);
 191                         }
 192                         /*
 193                         ** if we're interested in this component, save
 194                         ** a pointer to the component text, then start
 195                         ** using our next free buffer as the component
 196                         ** temp buffer (buffer switching saves an extra
 197                         ** copy of the component text).
 198                         */
 199                         if ((cptr = wantcomp[CHASH(name)])) {
 200                                 do {
 201                                         if (!mh_strcasecmp(name, cptr->c_name)) {
 202                                                 if (! cptr->c_text) {
 203                                                         cptr->c_text = tmpbuf;
 204                                                         for (cp = tmpbuf + strlen(tmpbuf) - 1; cp >= tmpbuf; cp--)
 205                                                                 if (isspace(*cp))
 206                                                                         *cp = 0;
 207                                                                 else
 208                                                                         break;
 209                                                         *--savecomp = cptr;
 210                                                         tmpbuf = *nxtbuf++;
 211                                                 }
 212                                                 break;
 213                                         }
 214                                 } while ((cptr = cptr->c_next));
 215                         }
 216
 217                         while (state == FLDPLUS) {
 218                                 state = m_getfld(state, name, tmpbuf, SBUFSIZ,
 219                                                 inb);
 220                                 if (outnum)
 221                                         FPUTS(tmpbuf);
 222                         }
 223                         break;
 224
 225                 case BODY:
 226                         state = FILEEOF;
 227                         goto finished;
 228
 229                 case LENERR:
 230                 case FMTERR:
 231                         fprintf(stderr, innum ? "??Format error (message %d) in " : "??Format error in ", outnum ? outnum : innum);
 232                         fprintf(stderr, "component %d\n", compnum);
 233
 234                         if (outnum) {
 235                                 FPUTS("\n\nBAD MSG:\n");
 236                                 FPUTS(name);
 237                                 if (putc('\n', scnout) == EOF)
 238                                         DIEWRERR();
 239                         }
 240                         /* fall through */
 241
 242                 case FILEEOF:
 243                         goto finished;
 244
 245                 default:
 246                         adios(NULL, "getfld() returned %d", state);
 247                 }
 248         }
 249
 250         /*
 251         ** format and output the scan line.
 252         */
 253 finished:
 254         if (ferror(inb)) {
 255                 advise("read", "unable to"); /* "read error" */
 256                 return SCNFAT;
 257         }
 258
 259         if (size)
 260                 dat[2] = size;
 261         else if (outnum > 0) {
 262                 dat[2] = ftell(scnout);
 263                 if (dat[2] == EOF)
 264                         DIEWRERR();
 265         }
 266
 267         if ((datecomp && !datecomp->c_text) || (!size && !outnum)) {
 268                 struct stat st;
 269
 270                 fstat(fileno(inb), &st);
 271                 if (!size && !outnum)
 272                         dat[2] = st.st_size;
 273                 if (datecomp) {
 274                         if (! datecomp->c_text) {
 275                                 if (datecomp->c_tws == NULL)
 276                                         datecomp->c_tws = (struct tws *) calloc((size_t) 1, sizeof(*datecomp->c_tws));
 277                                 if (datecomp->c_tws == NULL)
 278                                         adios(NULL, "unable to allocate tws buffer");
 279                                 *datecomp->c_tws = *dlocaltime((time_t *) &st.st_mtime);
 280                                 datecomp->c_flags |= CF_DATEFAB|CF_TRUE;
 281                         } else {
 282                                 datecomp->c_flags &= ~CF_DATEFAB;
 283                         }
 284                 }
 285         }
 286
 287         fmt_scan(fmt, scanl, slwidth, dat);
 288
 289         if (noisy)
 290                 fputs(scanl, stdout);
 291
 292         FINDCOMP(cptr, "encrypted");
 293         encrypted = cptr && cptr->c_text;
 294
 295         /* return dynamically allocated buffers to pool */
 296         while ((cptr = *savecomp++)) {
 297                 *--nxtbuf = cptr->c_text;
 298                 cptr->c_text = NULL;
 299         }
 300         *--nxtbuf = tmpbuf;
 301
 302         if (outnum && (ferror(scnout) || fclose(scnout) == EOF))
 303                 DIEWRERR();
 304
 305         return (state != FILEEOF ? SCNERR : encrypted ? SCNENC : SCNMSG);
 306 }
 307
 308 static int
 309 mh_fputs(char *s, FILE *stream)
 310 {
 311         char c;
 312
 313         while ((c = *s++))
 314                 if (putc(c,stream) == EOF )
 315                         return(EOF);
 316         return (0);
 317 }