mdw@git.distorted.org.uk Git - dvdrip/blob - dvd-sector-copy.c

   1 #define _GNU_SOURCE
   2 #define _FILE_OFFSET_BITS 64
   3
   4 #include <assert.h>
   5 #include <ctype.h>
   6 #include <errno.h>
   7 #include <inttypes.h>
   8 #include <math.h>
   9 #include <stdarg.h>
  10 #include <stdint.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <time.h>
  15
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18 #include <sys/ioctl.h>
  19 #include <sys/stat.h>
  20 #include <sys/time.h>
  21
  22 #include <getopt.h>
  23
  24 #include <linux/fs.h>
  25
  26 #include <dvdread/dvd_reader.h>
  27 #include <dvdread/dvd_udf.h>
  28 #include <dvdread/ifo_read.h>
  29 #include <dvdread/ifo_types.h>
  30
  31 #define CTYPE_HACK(fn, ch) fn((unsigned char)(ch))
  32 #define ISDIGIT(ch) CTYPE_HACK(isdigit, ch)
  33 #define ISSPACE(ch) CTYPE_HACK(isspace, ch)
  34
  35 #define N(v) (sizeof(v)/sizeof((v)[0]))
  36
  37 #define SECTORSZ 2048
  38 #define SECTORS(n) (((n) + (SECTORSZ - 1))/SECTORSZ)
  39
  40 static const char *prog = "<unset>";
  41 static int status = 0;
  42
  43 static void usage(FILE *fp)
  44 {
  45   fprintf(fp,
  46           "usage: %s [-c] [-D DEV] [-R MAP] "
  47                 "[-b OUTMAP] [-o OUTFILE] [-r [START]-[END]]\n",
  48           prog);
  49 }
  50
  51 static void vmoan(const char *fmt, va_list ap)
  52   { fprintf(stderr, "%s: ", prog); vfprintf(stderr, fmt, ap); }
  53
  54 __attribute__((format(printf, 1, 2)))
  55 static void moan(const char *fmt, ...)
  56 {
  57   va_list ap;
  58
  59   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  60   fputc('\n', stderr);
  61 }
  62
  63 __attribute__((noreturn, format(printf, 1, 2)))
  64 static void bail(const char *fmt, ...)
  65 {
  66   va_list ap;
  67
  68   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  69   fputc('\n', stderr);
  70   exit(2);
  71 }
  72
  73 __attribute__((noreturn, format(printf, 2, 3)))
  74 static void bail_syserr(int err, const char *fmt, ...)
  75 {
  76   va_list ap;
  77
  78   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  79   if (err) fprintf(stderr, ": %s", strerror(errno));
  80   fputc('\n', stderr);
  81   exit(2);
  82 }
  83
  84 #define DEFVEC(vtype, etype)                                            \
  85         typedef struct { etype *v; size_t n, sz; } vtype
  86 #define VEC_INIT { 0, 0, 0 }
  87 #define VEC_FREE(vv) do {                                               \
  88   free((vv)->v); (vv)->v 0; (vv)->n = (vv)->sz = 0;                     \
  89 } while (0)
  90 #define VEC_PUSH(p, vv) do {                                            \
  91   size_t _want;                                                         \
  92   if ((vv)->n >= (vv)->sz) {                                            \
  93     (vv)->sz = (vv)->sz ? 2*(vv)->sz : 32;                              \
  94     _want = (vv)->sz*sizeof(*(vv)->v);                                  \
  95     (vv)->v = realloc((vv)->v, _want);                                  \
  96     if (!(vv)->v) bail("out of memory allocating %zu bytes", _want);    \
  97   }                                                                     \
  98   (p) = &(vv)->v[(vv)->n++];                                            \
  99 } while (0)
 100
 101 enum { RAW, IFO, VOB, BUP };
 102 typedef uint_least32_t ident;
 103
 104 static inline ident mkident(unsigned kind, unsigned title, unsigned part)
 105   { return (((ident)kind << 0) | ((ident)title << 8) | ((ident)part << 16)); }
 106 static inline unsigned id_kind(ident id) { return ((id >> 0)&0x0ff); }
 107 static inline unsigned id_title(ident id) { return ((id >> 8)&0x0ff); }
 108 static inline unsigned id_part(ident id) { return ((id >> 16)&0x0ff); }
 109
 110 #define MAXFNSZ (1 + 8 + 1 + 12 + 1)
 111
 112 static void store_filename(char *buf, ident id)
 113 {
 114   switch (id_kind(id)) {
 115     case RAW:
 116       sprintf(buf, "#<raw device>");
 117       break;
 118     case IFO:
 119       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.IFO");
 120       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.IFO", id_title(id));
 121       break;
 122     case BUP:
 123       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.BUP");
 124       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.BUP", id_title(id));
 125       break;
 126     case VOB:
 127       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.VOB");
 128       else
 129         sprintf(buf, "/VIDEO_TS/VTS_%02u_%u.VOB", id_title(id), id_part(id));
 130       break;
 131     default:
 132       abort();
 133   }
 134 }
 135
 136 typedef uint_least32_t secaddr;
 137 #define PRIuSEC PRIuLEAST32
 138
 139 #define MAXFILES (1 + 2*99 + 1)
 140 struct file {
 141   ident id;
 142   secaddr start, end;
 143 };
 144 DEFVEC(file_v, struct file);
 145 static file_v filetab = VEC_INIT;
 146
 147 enum { EV_STOP, EV_BEGIN, EV_END, EV_WRITE };
 148 struct event {
 149   unsigned char ev, file;
 150   secaddr pos;
 151 };
 152 DEFVEC(event_v, struct event);
 153 static event_v eventq = VEC_INIT;
 154
 155 static int compare_event(const void *a, const void *b)
 156 {
 157   const struct event *eva = a, *evb = b;
 158
 159   if (eva->pos < evb->pos) return (-1);
 160   else if (eva->pos > evb->pos) return (+1);
 161
 162   if (eva->ev < evb->ev) return (-1);
 163   else if (eva->ev > evb->ev) return (+1);
 164
 165   if (eva->file < evb->file) return (-1);
 166   else if (eva->file > evb->file) return (+1);
 167
 168   return (0);
 169 }
 170
 171 typedef uint_least32_t bits;
 172 static bits live[(MAXFILES + 31)/32];
 173
 174 static inline int livep(unsigned i)
 175   { return (live[i/32]&((bits)1 << (i%32))); }
 176 static inline void set_live(unsigned i)
 177   { live[i/32] |= (bits)1 << (i%32); }
 178 static inline void clear_live(unsigned i)
 179   { live[i/32] &= ~((bits)1 << (i%32)); }
 180 static inline int least_live(void)
 181 {
 182   unsigned i, n = (filetab.n + 32)/32;
 183   bits b;
 184
 185   for (i = 0; i < n; i++) { b = live[i]; if (b) goto found; }
 186   return (-1);
 187 found:
 188   i *= 32;
 189   if (!(b&0x0000ffff)) { b >>= 16; i += 16; }
 190   if (!(b&0x000000ff)) { b >>=  8; i +=  8; }
 191   if (!(b&0x0000000f)) { b >>=  4; i +=  4; }
 192   if (!(b&0x00000003)) { b >>=  2; i +=  2; }
 193   if (!(b&0x00000001)) { b >>=  1; i +=  1; }
 194   assert(b&1);
 195   return (i);
 196 }
 197
 198 static void put_event(unsigned evtype, unsigned file, secaddr pos)
 199 {
 200   struct event *ev;
 201
 202   VEC_PUSH(ev, &eventq);
 203   ev->ev = evtype; ev->file = file; ev->pos = pos;
 204 }
 205
 206 static void put_file(ident id, secaddr start, secaddr end)
 207 {
 208   struct file *f;
 209   size_t i;
 210
 211   VEC_PUSH(f, &filetab); i = f - filetab.v;
 212   f->id = id; f->start = start; f->end = end;
 213   put_event(EV_BEGIN, i, start);
 214   put_event(EV_END, i, end);
 215 }
 216
 217 static void put_menu(dvd_reader_t *dvd, unsigned title)
 218 {
 219   ident id = mkident(VOB, title, 0);
 220   char fn[MAXFNSZ];
 221   secaddr start, len;
 222
 223   store_filename(fn, id);
 224   start = UDFFindFile(dvd, fn, &len); if (!start) return;
 225 #ifdef DEBUG
 226       printf(";; %8"PRIuSEC" .. %-8"PRIuSEC": %s\n",
 227              start, start + SECTORS(len), fn);
 228 #endif
 229   put_file(id, start, start + SECTORS(len));
 230 }
 231
 232 static void put_title(dvd_reader_t *dvd, unsigned title)
 233 {
 234   char fn[MAXFNSZ];
 235   secaddr start[9], len[9];
 236   unsigned i, npart;
 237
 238   for (i = 0; i < 9; i++) {
 239     store_filename(fn, mkident(VOB, title, i + 1));
 240     start[i] = UDFFindFile(dvd, fn, &len[i]); if (!start[i]) break;
 241   }
 242   npart = i; if (!npart) return;
 243
 244 #ifdef DEBUG
 245   for (i = 0; i < npart; i++) {
 246     store_filename(fn, mkident(VOB, title, i + 1));
 247     printf(";; %8"PRIuSEC" .. %-8"PRIuSEC": %s\n",
 248            start[i], start[i] + SECTORS(len[i]), fn);
 249   }
 250 #endif
 251
 252   if (npart > 1)
 253     for (i = 0; i < npart - 1; i++) {
 254       if (len[i]%SECTORSZ)
 255         bail("title %u part %u length = %"PRIuSEC" not a multiple of %d",
 256              title, i, len[i], SECTORSZ);
 257       if (start[i] + len[i]/SECTORSZ != start[i + 1])
 258         bail
 259           ("title %u part %u end = %"PRIuSEC" /= part %u start = %"PRIuSEC"",
 260            title, i, start[i] + len[i]/SECTORSZ, i + 1, start[i + 1]);
 261     }
 262
 263   put_file(mkident(VOB, title, 1),
 264            start[0], start[npart - 1] + SECTORS(len[npart - 1]));
 265 }
 266
 267 static int progresslen = 0;
 268
 269 static void clear_progress_internal(void)
 270   { while (progresslen) { fputs("\b \b", stdout); progresslen--; } }
 271 static void clear_progress(void)
 272   { clear_progress_internal(); fflush(stdout); }
 273 static void vappend_progress(const char *fmt, va_list ap)
 274   { progresslen += vprintf(fmt, ap); }
 275 __attribute__((format(printf, 1, 2)))
 276 static void append_progress(const char *fmt, ...)
 277 {
 278   va_list ap;
 279
 280   va_start(ap, fmt);
 281   vappend_progress(fmt, ap);
 282   va_end(ap);
 283 }
 284 __attribute__((format(printf, 1, 2)))
 285 static void print_progress(const char *fmt, ...)
 286 {
 287   va_list ap;
 288
 289   va_start(ap, fmt);
 290   clear_progress_internal();
 291   vappend_progress(fmt, ap);
 292   va_end(ap);
 293 }
 294
 295 struct source {
 296   dvd_reader_t *dvd;
 297   int dvdfd;
 298   struct file *file;
 299   dvd_file_t *vob;
 300
 301   unsigned f;
 302 #define SRCF_ALLPROGRESS 1u
 303   secaddr last_pos, limit, nsectors, ndone;
 304   struct timeval last_time;
 305   double wsum, wcount;
 306   const char *mapfile; FILE *mapfp;
 307 };
 308 #define SOURCE_INIT { 0, -1, 0, 0,  0, 0, 0, 0, 0, { 0, 0 }, 0.0, 0.0, 0, 0 }
 309
 310 static void report_progress(struct source *src, secaddr pos)
 311 {
 312   char etastr[32];
 313   struct timeval now;
 314   int eta;
 315   double percent, t, f, g, rate;
 316   char *unit;
 317
 318 #define ALPHA 0.02
 319 #define BETA (1 - ALPHA)
 320
 321   gettimeofday(&now, 0);
 322   t = (now.tv_sec - src->last_time.tv_sec) +
 323     (now.tv_usec - src->last_time.tv_usec)/1000000.0;
 324
 325   if (t) {
 326     g = src->wcount ? pow(BETA, t) : 0.0; f = (1 - g)/(1 - BETA);
 327     src->wsum = f*(pos - src->last_pos)/t + g*src->wsum;
 328     src->wcount = f + g*src->wcount;
 329     src->ndone += pos - src->last_pos;
 330     src->last_time = now; src->last_pos = pos;
 331   }
 332
 333   if (!src->wsum || !src->wcount)
 334     { rate = 0; strcpy(etastr, "???"); }
 335   else {
 336     rate = src->wsum/src->wcount;
 337     eta = (int)((src->nsectors - src->ndone)/rate);
 338     sprintf(etastr, "%d:%02d:%02d", eta/3600, (eta/60)%60, eta%60);
 339   }
 340
 341   rate *= SECTORSZ; unit = "";
 342   if (rate > 128) { rate /= 1024; unit = "k"; }
 343   if (rate > 128) { rate /= 1024; unit = "M"; }
 344   if (rate > 128) { rate /= 1024; unit = "G"; }
 345
 346   if (src->f&SRCF_ALLPROGRESS) percent = pos*100.0/src->limit;
 347   else percent = src->ndone*100.0/src->nsectors;
 348   print_progress
 349     ("copied %.1f%% (%"PRIuSEC" of %"PRIuSEC"; %.1f %sB/s, ETA %s)",
 350      percent, pos, src->limit,  rate, unit, etastr);
 351   if (src->file && id_kind(src->file->id) == VOB) {
 352     append_progress(" -- %s %d %3.1f%%",
 353                     id_part(src->file->id) ? "title" : "menu",
 354                     id_title(src->file->id),
 355                     (pos - src->file->start)*100.0/
 356                       (src->file->end - src->file->start));
 357   }
 358
 359 #undef ALPHA
 360 #undef BETA
 361 }
 362
 363 static void report_bad_blocks_progress(struct source *src,
 364                                        secaddr lo, secaddr hi, int err)
 365 {
 366   report_progress(src, hi);
 367
 368   if (lo == hi) append_progress(": retrying bad sector");
 369   else
 370     append_progress(": %"PRIuSEC" bad %s",
 371                     hi - lo, hi == lo + 1 ? "sector" : "sectors");
 372   if (err != EIO) append_progress(" (%s)", strerror(err));
 373   fflush(stdout);
 374 }
 375
 376 static ssize_t read_sectors(struct source *src, secaddr pos,
 377                             void *buf, secaddr want)
 378 {
 379   ssize_t n;
 380
 381 again:
 382   if (src->vob)
 383     n = DVDReadBlocks(src->vob, pos - src->file->start, want, buf);
 384   else if (src->file) {
 385     if (lseek(src->dvdfd, (off_t)pos*SECTORSZ, SEEK_SET) < 0)
 386       bail_syserr(errno, "failed to seek to sector %"PRIuSEC"", pos);
 387     n = read(src->dvdfd, buf, want*SECTORSZ);
 388     if (n >= 0) n /= SECTORSZ;
 389   } else {
 390     memset(buf, 0, want*SECTORSZ);
 391     n = want;
 392   }
 393
 394   if (n < 0 && errno == EINTR) goto again;
 395   return (n);
 396 }
 397
 398 static void carefully_write(int fd, const void *buf, size_t sz)
 399 {
 400   const unsigned char *p = buf;
 401   ssize_t n;
 402
 403   if (fd < 0) return;
 404   while (sz) {
 405     n = write(fd, p, sz);
 406     if (n < 0) {
 407       if (errno == EINTR) continue;
 408       bail_syserr(errno, "failed to write to output file");
 409     }
 410     if (!n) bail("unexpected short write to output file");
 411     p += n; sz -= n;
 412   }
 413 }
 414
 415 static void emit(struct source *src, int outfd, secaddr start, secaddr end)
 416 {
 417 #define BUFSECTORS 512
 418
 419   int least, i;
 420   unsigned char buf[BUFSECTORS*SECTORSZ];
 421   secaddr pos;
 422   secaddr bad_lo, bad_hi, good, step;
 423   size_t want;
 424   ssize_t n;
 425   static int first_time = 1;
 426 #ifdef DEBUG
 427   struct file *f;
 428   char fn[MAXFNSZ];
 429   int act = -1;
 430 #endif
 431
 432   least = least_live();
 433
 434 #ifdef DEBUG
 435   printf(";; %8"PRIuSEC" .. %"PRIuSEC"\n", start, end);
 436
 437   for (i = 0; i < filetab.n; i++) {
 438     if (!livep(i)) continue;
 439     if (act == -1) act = i;
 440     f = &filetab.v[i]; store_filename(fn, f->id);
 441     printf(";;\t\t%8"PRIuSEC" .. %-8"PRIuSEC" %s\n",
 442            start - f->start, end - f->start, fn);
 443   }
 444   if (act == -1) printf(";;\t\t#<no live source>\n");
 445   assert(act == least);
 446 #endif
 447
 448   if (least == -1)
 449     { src->file = 0; src->vob = 0; }
 450   else {
 451     src->file = &filetab.v[least];
 452     switch (id_kind(src->file->id)) {
 453       case RAW:
 454         src->vob = 0;
 455         break;
 456       case VOB:
 457         if (first_time) { clear_progress(); first_time = 0; }
 458         src->vob = DVDOpenFile(src->dvd, id_title(src->file->id),
 459                                id_part(src->file->id)
 460                                  ? DVD_READ_TITLE_VOBS
 461                                  : DVD_READ_MENU_VOBS);
 462         if (!src->vob)
 463           bail("failed to open %s %u",
 464                id_part(src->file->id) ? "title" : "menu",
 465                id_title(src->file->id));
 466         break;
 467       default:
 468         abort();
 469     }
 470   }
 471
 472   pos = start;
 473   while (pos < end) {
 474     want = end - pos; if (want > BUFSECTORS) want = BUFSECTORS;
 475     n = read_sectors(src, pos, buf, want);
 476
 477     if (n <= 0) {
 478       report_bad_blocks_progress(src, pos, pos, errno);
 479       for (i = 0; i < 4; i++) {
 480         n = read_sectors(src, pos, buf, 1);
 481         if (n > 0) {
 482           clear_progress();
 483           moan("sector %"PRIuSEC" read ok after retry", pos);
 484           bad_lo = bad_hi = pos;
 485           goto recovered;
 486         }
 487       }
 488
 489       bad_lo = pos; step = 1; bad_hi = pos + 1;
 490       for (;;) {
 491         report_bad_blocks_progress(src, bad_lo, bad_hi, errno);
 492         if (bad_hi >= end) {
 493           clear_progress();
 494           moan("giving up on this extent");
 495           n = 0; goto recovered;
 496         }
 497         step *= 2;
 498         if (step > end - bad_lo) step = end - bad_lo;
 499         pos = bad_lo + step - 1;
 500         n = read_sectors(src, pos, buf, 1);
 501         if (n > 0) break;
 502         bad_hi = pos + 1;
 503       }
 504
 505       good = pos;
 506       while (good > bad_hi) {
 507         report_bad_blocks_progress(src, bad_lo, bad_hi, errno);
 508         pos = bad_hi + (good - bad_hi)/2;
 509         n = read_sectors(src, pos, buf, 1);
 510         if (n > 0) good = pos;
 511         else bad_hi = pos + 1;
 512       }
 513     recovered:
 514       if (bad_hi > bad_lo) {
 515         clear_progress();
 516         moan("skipping %"PRIuSEC" bad sectors (%"PRIuSEC" .. %"PRIuSEC")",
 517              bad_hi - bad_lo, bad_lo, bad_hi);
 518         if (src->mapfile) {
 519           if (!src->mapfp) {
 520             src->mapfp = fopen(src->mapfile, "w");
 521             if (!src->mapfp)
 522               bail_syserr(errno, "failed to open bad-sector map file `%s'",
 523                           optarg);
 524             fprintf(src->mapfp, "## bad sector map\n\n");
 525           }
 526           fprintf(src->mapfp, "%"PRIuSEC" %"PRIuSEC"\n", bad_lo, bad_hi);
 527           fflush(src->mapfp);
 528           if (ferror(src->mapfp))
 529             bail_syserr(errno, "error writing bad-sector map file");
 530         }
 531         if (outfd >= 0 &&
 532             lseek(outfd, (off_t)(bad_hi - bad_lo)*SECTORSZ, SEEK_CUR) < 0)
 533           bail_syserr(errno, "failed to seek past bad sectors");
 534         status = 1;
 535       }
 536       pos = bad_hi;
 537     }
 538
 539     if (n > 0) { carefully_write(outfd, buf, n*SECTORSZ); pos += n; }
 540     report_progress(src, pos); fflush(stdout);
 541   }
 542
 543   if (src->vob) { DVDCloseFile(src->vob); src->vob = 0; }
 544
 545 #undef BUFSECTORS
 546 }
 547
 548 #ifdef notdef
 549 static void logfn(void *p, dvd_logger_level_t lev,
 550                   const char *fmt, va_list ap)
 551 {
 552   switch (lev) {
 553     case DVD_LOGGER_LEVEL_ERROR:
 554       fprintf("%s (libdvdread error): ", prog);
 555       break;
 556     case DVD_LOGGER_LEVEL_WARN:
 557       fprintf("%s (libdvdread warning): ", prog);
 558       break;
 559     default:
 560       return;
 561   }
 562   vfprintf(stderr, fmt, ap);
 563   fputc('\n', stderr);
 564 }
 565 static const dvd_logger_cb logger = { logfn };
 566 #endif
 567
 568 struct buf {
 569   char *p;
 570   size_t n, sz;
 571 };
 572 #define BUF_INIT { 0, 0, 0 }
 573 #define BUF_REWIND(b) do { (b)->n = 0; } while (0)
 574 #define BUF_FREE(b) do {                                                \
 575   buf *_b = (b);                                                        \
 576   free(_b->p); _b->p = 0; _b->n = _b->sz = 0;                           \
 577 } while (0)
 578 #define BUF_PUTC(b, ch) do {                                            \
 579   struct buf *_b = (b);                                                 \
 580   if (_b->n >= _b->sz) {                                                \
 581     _b->sz = _b->sz ? 2*_b->sz : 32;                                    \
 582     _b->p = realloc(_b->p, _b->sz);                                     \
 583     if (!_b->p) bail("out of memory allocating %zu bytes", _b->sz);     \
 584   }                                                                     \
 585   _b->p[_b->n] = (ch);                                                  \
 586 } while (0)
 587
 588 static int read_line(FILE *fp, struct buf *b)
 589 {
 590   int ch;
 591
 592   ch = getc(fp);
 593   if (ch == EOF)
 594     return (-1);
 595   else if (ch != '\n') do {
 596     BUF_PUTC(b, ch); b->n++;
 597     ch = getc(fp);
 598   } while (ch != EOF && ch != '\n');
 599   BUF_PUTC(b, 0);
 600   return (0);
 601 }
 602
 603 int main(int argc, char *argv[])
 604 {
 605   unsigned f = 0;
 606   char *p;
 607   uint64_t volsz;
 608   secaddr pos;
 609   off_t off;
 610   struct source src = SOURCE_INIT;
 611   unsigned long start, end;
 612   const struct event *ev;
 613   const char *device = "/dev/dvd", *outfile = 0;
 614   int opt, err, outfd = -1, blksz;
 615   unsigned n;
 616   size_t i;
 617   FILE *fp;
 618   struct buf buf = BUF_INIT;
 619   struct stat st;
 620 #ifdef DEBUG
 621   const struct file *file;
 622   char fn[MAXFNSZ];
 623 #endif
 624
 625 #define f_bogus 1u
 626 #define f_continue 2u
 627 #define f_fixup 4u
 628 #define f_write 256u
 629
 630   p = strrchr(argv[0], '/'); prog = p ? p + 1 : argv[0];
 631   for (;;) {
 632     opt = getopt(argc, argv, "hD:FR:b:co:r:"); if (opt < 0) break;
 633     switch (opt) {
 634       case 'h': usage(stderr); exit(0);
 635       case 'D': device = optarg; break;
 636       case 'F': f |= f_fixup; break;
 637       case 'R':
 638         fp = fopen(optarg, "r");
 639         if (!fp)
 640           bail_syserr(errno, "failed to open ranges file `%s'", optarg);
 641         i = 0;
 642         for (;;) {
 643           BUF_REWIND(&buf); if (read_line(fp, &buf)) break;
 644           p = buf.p; i++;
 645           while (ISSPACE(*p)) p++;
 646           if (!*p || *p == '#') continue;
 647           if (!ISDIGIT(*p)) goto bad_range_file;
 648           start = strtoul(p, &p, 0);
 649           if (errno || !ISSPACE(*p)) goto bad_range_file;
 650           do p++; while (ISSPACE(*p));
 651           if (!ISDIGIT(*p)) goto bad_range_file;
 652           end = strtoul(p, &p, 0);
 653           if (errno || (*p && !ISSPACE(*p))) goto bad_range_file;
 654           while (ISSPACE(*p)) p++;
 655           if (*p) goto bad_range_file;
 656           if (start > end) goto bad_range_file;
 657           if (start < end) {
 658             put_event(EV_WRITE, 0, start);
 659             put_event(EV_STOP, 0, end);
 660           }
 661         }
 662         if (ferror(fp))
 663           bail_syserr(errno, "failed to read ranges file `%s'", optarg);
 664         break;
 665       bad_range_file:
 666         bail("bad range `%s' at `%s' line %zu", buf.p, optarg, i);
 667       case 'b':
 668         if (src.mapfile) bail("can't have multiple map files");
 669         src.mapfile = optarg;
 670         break;
 671       case 'c': f |= f_continue; break;
 672       case 'o': outfile = optarg; break;
 673       case 'r':
 674         err = errno; errno = 0;
 675         p = optarg;
 676         if (*p == '-')
 677           start = 0;
 678         else {
 679           if (!ISDIGIT(*p)) goto bad_range;
 680           start = strtoul(p, &p, 0);
 681           if (errno || *p != '-') goto bad_range;
 682         }
 683         p++;
 684         if (!*p)
 685           put_event(EV_WRITE, 0, start);
 686         else {
 687           if (!ISDIGIT(*p)) goto bad_range;
 688           end = strtoul(p, &p, 0);
 689           if (errno || *p) goto bad_range;
 690           if (start > end) goto bad_range;
 691           if (start < end) {
 692             put_event(EV_WRITE, 0, start);
 693             put_event(EV_STOP, 0, end);
 694           }
 695         }
 696         errno = err;
 697         break;
 698       bad_range:
 699         bail("bad range `%s'", optarg);
 700         break;
 701       default: f |= f_bogus; break;
 702     }
 703   }
 704   if (optind < argc) f |= f_bogus;
 705   if (f&f_bogus) { usage(stderr); exit(2); }
 706
 707   src.dvdfd = open(device, O_RDONLY);
 708   if (src.dvdfd < 0)
 709     bail_syserr(errno, "failed to open device `%s'", device);
 710   if (fstat(src.dvdfd, &st))
 711     bail_syserr(errno, "failed to stat device `%s'", device);
 712   if (S_ISREG(st.st_mode)) {
 713     blksz = SECTORSZ;
 714     volsz = st.st_size;
 715   } else if (S_ISBLK(st.st_mode)) {
 716     if (ioctl(src.dvdfd, BLKSSZGET, &blksz))
 717       bail_syserr(errno, "failed to get block size for `%s'", device);
 718     if (ioctl(src.dvdfd, BLKGETSIZE64, &volsz))
 719       bail_syserr(errno, "failed to get volume size for `%s'", device);
 720   } else
 721     bail("can't use `%s' as source: expected file or block device", device);
 722
 723   if (blksz != SECTORSZ)
 724     bail("device `%s' block size %d /= %d", device, blksz, SECTORSZ);
 725   if (volsz%SECTORSZ)
 726     bail("device `%s' volume size %"PRIu64" not a multiple of %d",
 727          device, volsz, SECTORSZ);
 728
 729   if (outfile) {
 730     outfd = open(outfile, O_WRONLY | O_CREAT, 0666);
 731     if (outfd < 0)
 732       bail_syserr(errno, "failed to create output file `%s'", outfile);
 733   }
 734
 735   if (f&f_continue) {
 736     if (!outfile) bail("can't continue without output file");
 737     off = lseek(outfd, 0, SEEK_END);
 738     if (off < 0)
 739       bail_syserr(errno, "failed to seek to end of output file `%s'",
 740                   outfile);
 741     put_event(EV_WRITE, 0, off/SECTORSZ);
 742   } else if (!eventq.n && !(f&f_fixup))
 743     put_event(EV_WRITE, 0, 0);
 744
 745 #ifdef notdef
 746   src.dvd = DVDOpen2(0, &logger, device);
 747 #else
 748   src.dvd = DVDOpen(device);
 749 #endif
 750   if (!src.dvd) bail("failed to open DVD on `%s'", device);
 751
 752   /* It's fast enough just to check everything. */
 753   put_menu(src.dvd, 0);
 754   for (i = 1; i < 100; i++) {
 755     put_menu(src.dvd, i);
 756     put_title(src.dvd, i);
 757   }
 758   put_file(mkident(RAW, 0, 0), 0, volsz/SECTORSZ);
 759   assert(filetab.n <= MAXFILES);
 760
 761   for (i = 0, src.limit = 0; i < filetab.n; i++)
 762     if (filetab.v[i].end > src.limit) src.limit = filetab.v[i].end;
 763
 764   if (end > src.limit) end = src.limit;
 765
 766 #ifdef DEBUG
 767   printf("\n;; files:\n");
 768   for (i = 0; i < filetab.n; i++) {
 769     file = &filetab.v[i];
 770     store_filename(fn, file->id);
 771     printf(";;\t%8"PRIuSEC" %s\n", file->start, fn);
 772   }
 773 #endif
 774
 775   qsort(eventq.v, eventq.n, sizeof(struct event), compare_event);
 776
 777   f &= ~f_write; start = 0; n = 0;
 778   for (i = 0; i < eventq.n; i++) {
 779     ev = &eventq.v[i];
 780     switch (ev->ev) {
 781       case EV_WRITE:
 782         if (f&f_write)
 783           bail("overlapping ranges: range from %lu still open at %"PRIuSEC"",
 784                start, ev->pos);
 785         n++; f |= f_write; start = ev->pos;
 786         break;
 787       case EV_STOP:
 788         f &= ~f_write;
 789         break;
 790     }
 791   }
 792
 793   f &= ~f_write; start = 0;
 794   for (i = 0; i < eventq.n; i++) {
 795     ev = &eventq.v[i];
 796     switch (ev->ev) {
 797       case EV_WRITE: start = ev->pos; f |= f_write; break;
 798       case EV_STOP: src.nsectors += ev->pos - start; f &= ~f_write; break;
 799     }
 800     if (ev->pos >= src.limit) break;
 801     if (f&f_fixup) start = ev->pos;
 802   }
 803   eventq.n = i;
 804   if (f&f_fixup) {
 805     put_event(EV_WRITE, 0, start);
 806     n++; f |= f_write;
 807   }
 808   if (f&f_write) {
 809     src.nsectors += src.limit - start;
 810     put_event(EV_STOP, 0, src.limit);
 811   }
 812   if (n == 1 && (f&f_write))
 813     src.f |= SRCF_ALLPROGRESS;
 814   f &= ~f_write;
 815
 816 #ifdef DEBUG
 817   printf("\n;; event sweep:\n");
 818 #endif
 819   for (pos = 0, i = 0; i < eventq.n; i++) {
 820     ev = &eventq.v[i];
 821     if (ev->pos > pos) {
 822       if (f&f_write) emit(&src, outfd, pos, ev->pos);
 823       pos = ev->pos;
 824 #ifdef DEBUG
 825       clear_progress();
 826       printf(";;\n");
 827 #endif
 828     }
 829     switch (ev->ev) {
 830       case EV_BEGIN:
 831         set_live(ev->file);
 832 #ifdef DEBUG
 833         store_filename(fn, filetab.v[ev->file].id);
 834         clear_progress();
 835         printf(";; %8"PRIuSEC": begin `%s'\n", pos, fn);
 836 #endif
 837         break;
 838       case EV_WRITE:
 839         gettimeofday(&src.last_time, 0); src.last_pos = pos;
 840         if (outfd >= 0 &&
 841             lseek(outfd, (off_t)ev->pos*SECTORSZ, SEEK_SET) < 0)
 842           bail_syserr(errno,
 843                       "failed to seek to resume position "
 844                       "(sector %"PRIuSEC") in output file `%s'",
 845                       ev->pos, outfile);
 846 #ifdef DEBUG
 847         clear_progress();
 848         printf(";; %8"PRIuSEC": begin write\n", pos);
 849 #endif
 850         f |= f_write;
 851         break;
 852       case EV_STOP:
 853         f &= ~f_write;
 854 #ifdef DEBUG
 855         clear_progress();
 856         printf(";; %8"PRIuSEC": end write\n", pos);
 857 #endif
 858         break;
 859       case EV_END:
 860         clear_live(ev->file);
 861 #ifdef DEBUG
 862         store_filename(fn, filetab.v[ev->file].id);
 863         clear_progress();
 864         printf(";; %8"PRIuSEC": end `%s'\n", pos, fn);
 865 #endif
 866         break;
 867       default: abort();
 868     }
 869   }
 870
 871   if (progresslen) putchar('\n');
 872
 873   if (outfd >= 0 && ftruncate(outfd, (off_t)src.limit*SECTORSZ) < 0)
 874     bail_syserr(errno, "failed to set output file `%s' length", outfile);
 875
 876   if (src.dvd) DVDClose(src.dvd);
 877   if (src.dvdfd >= 0) close(src.dvdfd);
 878   if (outfd >= 0) close(outfd);
 879   if (src.mapfp) {
 880     if (ferror(src.mapfp) || fclose(src.mapfp))
 881       bail_syserr(errno, "error writing bad-sector map file");
 882   }
 883
 884 #undef f_bogus
 885 #undef f_continue
 886 #undef f_fixup
 887 #undef f_write
 888
 889   return (status);
 890 }