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/time.h>
  20
  21 #include <getopt.h>
  22
  23 #include <linux/fs.h>
  24
  25 #include <dvdread/dvd_reader.h>
  26 #include <dvdread/dvd_udf.h>
  27 #include <dvdread/ifo_read.h>
  28 #include <dvdread/ifo_types.h>
  29
  30 #define SECTORSZ 2048
  31 #define SECTORS(n) (((n) + (SECTORSZ - 1))/SECTORSZ)
  32
  33 #define CTYPE_HACK(fn, ch) fn((unsigned char)(ch))
  34 #define ISDIGIT(ch) CTYPE_HACK(isdigit, ch)
  35 #define ISSPACE(ch) CTYPE_HACK(isspace, ch)
  36
  37 #define N(v) (sizeof(v)/sizeof((v)[0]))
  38
  39 enum { RAW, IFO, VOB, BUP };
  40 typedef uint_least32_t ident;
  41
  42 static inline ident mkident(unsigned kind, unsigned title, unsigned part)
  43   { return (((ident)kind << 0) | ((ident)title << 8) | ((ident)part << 16)); }
  44 static inline unsigned id_kind(ident id) { return ((id >> 0)&0x0ff); }
  45 static inline unsigned id_title(ident id) { return ((id >> 8)&0x0ff); }
  46 static inline unsigned id_part(ident id) { return ((id >> 16)&0x0ff); }
  47
  48 static const char *prog = "<unset>";
  49 static int status = 0;
  50
  51 static void usage(FILE *fp)
  52 {
  53   fprintf(fp,
  54           "usage: %s [-c] [-D DEV] [-R MAP] "
  55                 "[-b OUTMAP] [-o OUTFILE] [-r [START]-[END]]\n",
  56           prog);
  57 }
  58
  59 static void vmoan(const char *fmt, va_list ap)
  60   { fprintf(stderr, "%s: ", prog); vfprintf(stderr, fmt, ap); }
  61 __attribute__((noreturn, format(printf, 1, 2)))
  62 static void bail(const char *fmt, ...)
  63 {
  64   va_list ap;
  65
  66   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  67   fputc('\n', stderr);
  68   exit(2);
  69 }
  70 __attribute__((noreturn, format(printf, 2, 3)))
  71 static void bail_syserr(int err, const char *fmt, ...)
  72 {
  73   va_list ap;
  74
  75   va_start(ap, fmt); vmoan(fmt, ap); va_end(ap);
  76   if (err) fprintf(stderr, ": %s", strerror(errno));
  77   fputc('\n', stderr);
  78   exit(2);
  79 }
  80
  81 #define MAXFNSZ (1 + 8 + 1 + 12 + 1)
  82
  83 static void store_filename(char *buf, ident id)
  84 {
  85   switch (id_kind(id)) {
  86     case RAW:
  87       sprintf(buf, "#<raw device>");
  88       break;
  89     case IFO:
  90       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.IFO");
  91       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.IFO", id_title(id));
  92       break;
  93     case BUP:
  94       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.BUP");
  95       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.BUP", id_title(id));
  96       break;
  97     case VOB:
  98       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.VOB");
  99       else
 100         sprintf(buf, "/VIDEO_TS/VTS_%02u_%u.VOB", id_title(id), id_part(id));
 101       break;
 102     default:
 103       abort();
 104   }
 105 }
 106
 107 #define DEFVEC(vtype, etype)                                            \
 108         typedef struct { etype *v; size_t n, sz; } vtype
 109 #define VEC_INIT { 0, 0, 0 }
 110 #define VEC_FREE(vv) do {                                               \
 111   free((vv)->v); (vv)->v 0; (vv)->n = (vv)->sz = 0;                     \
 112 } while (0)
 113 #define VEC_PUSH(p, vv) do {                                            \
 114   size_t _want;                                                         \
 115   if ((vv)->n >= (vv)->sz) {                                            \
 116     (vv)->sz = (vv)->sz ? 2*(vv)->sz : 32;                              \
 117     _want = (vv)->sz*sizeof(*(vv)->v);                                  \
 118     (vv)->v = realloc((vv)->v, _want);                                  \
 119     if (!(vv)->v) bail("out of memory allocating %zu bytes", _want);    \
 120   }                                                                     \
 121   (p) = &(vv)->v[(vv)->n++];                                            \
 122 } while (0)
 123
 124 #define MAXFILES (1 + 2*99 + 1)
 125 struct file {
 126   ident id;
 127   uint32_t start, end;
 128 };
 129 DEFVEC(file_v, struct file);
 130 static file_v filetab = VEC_INIT;
 131
 132 enum { EV_WRITE, EV_BEGIN, EV_END, EV_STOP };
 133 struct event {
 134   unsigned char ev, file;
 135   uint32_t pos;
 136 };
 137 DEFVEC(event_v, struct event);
 138 static event_v eventq = VEC_INIT;
 139
 140 typedef uint_least32_t bits;
 141 static bits live[(MAXFILES + 31)/32];
 142
 143 static inline int livep(unsigned i)
 144   { return (live[i/32]&((bits)1 << (i%32))); }
 145 static inline void set_live(unsigned i)
 146   { live[i/32] |= (bits)1 << (i%32); }
 147 static inline void clear_live(unsigned i)
 148   { live[i/32] &= ~((bits)1 << (i%32)); }
 149 static inline int least_live(void)
 150 {
 151   unsigned i, n = (filetab.n + 32)/32;
 152   bits b;
 153
 154   for (i = 0; i < n; i++) { b = live[i]; if (b) goto found; }
 155   return (-1);
 156 found:
 157   i *= 32;
 158   if (!(b&0x0000ffff)) { b >>= 16; i += 16; }
 159   if (!(b&0x000000ff)) { b >>=  8; i +=  8; }
 160   if (!(b&0x0000000f)) { b >>=  4; i +=  4; }
 161   if (!(b&0x00000003)) { b >>=  2; i +=  2; }
 162   if (!(b&0x00000001)) { b >>=  1; i +=  1; }
 163   assert(b&1);
 164   return (i);
 165 }
 166
 167 static void put_event(unsigned evtype, unsigned file, uint32_t pos)
 168 {
 169   struct event *ev;
 170
 171   VEC_PUSH(ev, &eventq);
 172   ev->ev = evtype; ev->file = file; ev->pos = pos;
 173 }
 174
 175 static void put_file(ident id, uint32_t start, uint32_t end)
 176 {
 177   struct file *f;
 178   size_t i;
 179
 180   VEC_PUSH(f, &filetab); i = f - filetab.v;
 181   f->id = id; f->start = start; f->end = end;
 182   put_event(EV_BEGIN, i, start);
 183   put_event(EV_END, i, end);
 184 }
 185
 186 static void put_menu(dvd_reader_t *dvd, unsigned title)
 187 {
 188   ident id = mkident(VOB, title, 0);
 189   char fn[MAXFNSZ];
 190   uint32_t start, len;
 191
 192   store_filename(fn, id);
 193   start = UDFFindFile(dvd, fn, &len); if (!start) return;
 194 #ifdef DEBUG
 195       printf(";; %8"PRIu32" .. %-8"PRIu32": %s\n",
 196              start, start + SECTORS(len), fn);
 197 #endif
 198   put_file(id, start, start + SECTORS(len));
 199 }
 200
 201 static void put_title(dvd_reader_t *dvd, unsigned title)
 202 {
 203   char fn[MAXFNSZ];
 204   uint32_t start[9], len[9];
 205   unsigned i, npart;
 206
 207   for (i = 0; i < 9; i++) {
 208     store_filename(fn, mkident(VOB, title, i + 1));
 209     start[i] = UDFFindFile(dvd, fn, &len[i]); if (!start[i]) break;
 210   }
 211   npart = i; if (!npart) return;
 212
 213 #ifdef DEBUG
 214   for (i = 0; i < npart; i++) {
 215     store_filename(fn, mkident(VOB, title, i + 1));
 216     printf(";; %8"PRIu32" .. %-8"PRIu32": %s\n",
 217            start[i], start[i] + SECTORS(len[i]), fn);
 218   }
 219 #endif
 220
 221   if (npart > 1)
 222     for (i = 0; i < npart - 1; i++) {
 223       if (len[i]%SECTORSZ)
 224         bail("title %u part %u length = %"PRIu32" not a multiple of %d",
 225              title, i, len[i], SECTORSZ);
 226       if (start[i] + len[i]/SECTORSZ != start[i + 1])
 227         bail("title %u part %u end = %"PRIu32" /= part %u start = %"PRIu32"",
 228              title, i, start[i] + len[i]/SECTORSZ, i + 1, start[i + 1]);
 229     }
 230
 231   put_file(mkident(VOB, title, 1),
 232            start[0], start[npart - 1] + SECTORS(len[npart - 1]));
 233 }
 234
 235 static int compare_event(const void *a, const void *b)
 236 {
 237   const struct event *eva = a, *evb = b;
 238
 239   if (eva->pos < evb->pos) return (-1);
 240   else if (eva->pos > evb->pos) return (+1);
 241
 242   if (eva->ev < evb->ev) return (-1);
 243   else if (eva->ev > evb->ev) return (+1);
 244
 245   if (eva->file < evb->file) return (-1);
 246   else if (eva->file > evb->file) return (+1);
 247
 248   return (0);
 249 }
 250
 251 static int progresslen = 0;
 252
 253 static void clear_progress_internal(void)
 254   { while (progresslen) { fputs("\b \b", stdout); progresslen--; } }
 255 static void clear_progress(void)
 256   { clear_progress_internal(); fflush(stdout); }
 257 static void vappend_progress(const char *fmt, va_list ap)
 258   { progresslen += vprintf(fmt, ap); }
 259 __attribute__((format(printf, 1, 2)))
 260 static void append_progress(const char *fmt, ...)
 261 {
 262   va_list ap;
 263
 264   va_start(ap, fmt);
 265   vappend_progress(fmt, ap);
 266   va_end(ap);
 267 }
 268 __attribute__((format(printf, 1, 2)))
 269 static void print_progress(const char *fmt, ...)
 270 {
 271   va_list ap;
 272
 273   va_start(ap, fmt);
 274   clear_progress_internal();
 275   vappend_progress(fmt, ap);
 276   va_end(ap);
 277 }
 278
 279 struct source {
 280   dvd_reader_t *dvd;
 281   int dvdfd;
 282   struct file *file;
 283   dvd_file_t *vob;
 284
 285   unsigned f;
 286 #define SRCF_ALLPROGRESS 1u
 287   uint32_t last_pos, limit, nsectors, ndone;
 288   struct timeval last_time;
 289   double wsum, wcount;
 290   const char *mapfile; FILE *mapfp;
 291 };
 292 #define SOURCE_INIT { 0, -1, 0, 0,  0, 0, 0, 0, 0, { 0, 0 }, 0.0, 0.0, 0, 0 }
 293
 294 static void report_progress(struct source *src, uint32_t pos)
 295 {
 296   char etastr[32];
 297   struct timeval now;
 298   int eta;
 299   double percent, t, f, g, rate;
 300   char *unit;
 301
 302 #define ALPHA 0.02
 303 #define BETA (1 - ALPHA)
 304
 305   gettimeofday(&now, 0);
 306   t = (now.tv_sec - src->last_time.tv_sec) +
 307     (now.tv_usec - src->last_time.tv_usec)/1000000.0;
 308
 309   if (t) {
 310     g = src->wcount ? pow(BETA, t) : 0.0; f = (1 - g)/(1 - BETA);
 311     src->wsum = f*(pos - src->last_pos)/t + g*src->wsum;
 312     src->wcount = f + g*src->wcount;
 313     src->ndone += pos - src->last_pos;
 314     src->last_time = now; src->last_pos = pos;
 315   }
 316
 317   if (!src->wsum || !src->wcount)
 318     { rate = 0; strcpy(etastr, "???"); }
 319   else {
 320     rate = src->wsum/src->wcount;
 321     eta = (int)((src->nsectors - src->ndone)/rate);
 322     sprintf(etastr, "%d:%02d:%02d", eta/3600, (eta/60)%60, eta%60);
 323   }
 324
 325   rate *= SECTORSZ; unit = "";
 326   if (rate > 128) { rate /= 1024; unit = "k"; }
 327   if (rate > 128) { rate /= 1024; unit = "M"; }
 328   if (rate > 128) { rate /= 1024; unit = "G"; }
 329
 330   if (src->f&SRCF_ALLPROGRESS) percent = pos*100.0/src->limit;
 331   else percent = src->ndone*100.0/src->nsectors;
 332   print_progress("copied %.1f%% (%"PRIu32" of %"PRIu32"; %.1f %sB/s, ETA %s)",
 333                  percent, pos, src->limit,
 334                  rate, unit, etastr);
 335   if (src->file && id_kind(src->file->id) == VOB) {
 336     append_progress(" -- %s %d %3.1f%%",
 337                     id_part(src->file->id) ? "title" : "menu",
 338                     id_title(src->file->id),
 339                     (pos - src->file->start)*100.0/
 340                       (src->file->end - src->file->start));
 341   }
 342
 343 #undef ALPHA
 344 #undef BETA
 345 }
 346
 347 static void report_bad_blocks_progress(struct source *src,
 348                                        uint32_t lo, uint32_t hi, int err)
 349 {
 350   report_progress(src, hi);
 351
 352   if (lo == hi) append_progress(": retrying bad sector");
 353   else
 354     append_progress(": %"PRIu32" bad %s",
 355                     hi - lo, hi == lo + 1 ? "sector" : "sectors");
 356   if (err != EIO) append_progress(" (%s)", strerror(err));
 357   fflush(stdout);
 358 }
 359
 360 static ssize_t read_sectors(struct source *src, uint32_t pos,
 361                             void *buf, uint32_t want)
 362 {
 363   ssize_t n;
 364
 365 again:
 366   if (src->vob)
 367     n = DVDReadBlocks(src->vob, pos - src->file->start, want, buf);
 368   else if (src->file) {
 369     if (lseek(src->dvdfd, (off_t)pos*SECTORSZ, SEEK_SET) < 0)
 370       bail_syserr(errno, "failed to seek to sector %"PRIu32"", pos);
 371     n = read(src->dvdfd, buf, want*SECTORSZ);
 372     if (n >= 0) n /= SECTORSZ;
 373   } else {
 374     memset(buf, 0, want*SECTORSZ);
 375     n = want;
 376   }
 377
 378   if (n < 0 && errno == EINTR) goto again;
 379   return (n);
 380 }
 381
 382 static void carefully_write(int fd, const void *buf, size_t sz)
 383 {
 384   const unsigned char *p = buf;
 385   ssize_t n;
 386
 387   if (fd < 0) return;
 388   while (sz) {
 389     n = write(fd, p, sz);
 390     if (n < 0) {
 391       if (errno == EINTR) continue;
 392       bail_syserr(errno, "failed to write to output file");
 393     }
 394     if (!n) bail("unexpected short write to output file");
 395     p += n; sz -= n;
 396   }
 397 }
 398
 399 static void emit(struct source *src, int outfd, uint32_t start, uint32_t end)
 400 {
 401 #define BUFSECTORS 512
 402
 403   int least, i;
 404   unsigned char buf[BUFSECTORS*SECTORSZ];
 405   uint32_t pos;
 406   uint32_t bad_lo, bad_hi, good, step;
 407   size_t want;
 408   ssize_t n;
 409   static int first_time = 1;
 410 #ifdef DEBUG
 411   struct file *f;
 412   char fn[MAXFNSZ];
 413   int act = -1;
 414 #endif
 415
 416   least = least_live();
 417
 418 #ifdef DEBUG
 419   printf(";; %8"PRIu32" .. %"PRIu32"\n", start, end);
 420
 421   for (i = 0; i < filetab.n; i++) {
 422     if (!livep(i)) continue;
 423     if (act == -1) act = i;
 424     f = &filetab.v[i]; store_filename(fn, f->id);
 425     printf(";;\t\t%8"PRIu32" .. %-8"PRIu32" %s\n",
 426            start - f->start, end - f->start, fn);
 427   }
 428   if (act == -1) printf(";;\t\t#<no live source>\n");
 429   assert(act == least);
 430 #endif
 431
 432   if (least == -1)
 433     { src->file = 0; src->vob = 0; }
 434   else {
 435     src->file = &filetab.v[least];
 436     switch (id_kind(src->file->id)) {
 437       case RAW:
 438         src->vob = 0;
 439         break;
 440       case VOB:
 441         if (first_time) { clear_progress(); first_time = 0; }
 442         src->vob = DVDOpenFile(src->dvd, id_title(src->file->id),
 443                                id_part(src->file->id)
 444                                  ? DVD_READ_TITLE_VOBS
 445                                  : DVD_READ_MENU_VOBS);
 446         if (!src->vob)
 447           bail("failed to open %s %u",
 448                id_part(src->file->id) ? "title" : "menu",
 449                id_title(src->file->id));
 450         break;
 451       default:
 452         abort();
 453     }
 454   }
 455
 456   pos = start;
 457   while (pos < end) {
 458     want = end - pos; if (want > BUFSECTORS) want = BUFSECTORS;
 459     n = read_sectors(src, pos, buf, want);
 460
 461     if (n <= 0) {
 462       report_bad_blocks_progress(src, pos, pos, errno);
 463       for (i = 0; i < 4; i++) {
 464         n = read_sectors(src, pos, buf, 1);
 465         if (n > 0) {
 466           clear_progress();
 467           fprintf(stderr, "%s: sector %"PRIu32" read ok after retry\n",
 468                   prog, pos);
 469           bad_lo = bad_hi = pos;
 470           goto recovered;
 471         }
 472       }
 473
 474       bad_lo = pos; step = 1; bad_hi = pos + 1;
 475       for (;;) {
 476         report_bad_blocks_progress(src, bad_lo, bad_hi, errno);
 477         if (bad_hi >= end) {
 478           clear_progress();
 479           fprintf(stderr, "%s: giving up on this extent\n", prog);
 480           n = 0; goto recovered;
 481         }
 482         step *= 2;
 483         if (step > end - bad_lo) step = end - bad_lo;
 484         pos = bad_lo + step - 1;
 485         n = read_sectors(src, pos, buf, 1);
 486         if (n > 0) break;
 487         bad_hi = pos + 1;
 488       }
 489
 490       good = pos;
 491       while (good > bad_hi) {
 492         report_bad_blocks_progress(src, bad_lo, bad_hi, errno);
 493         pos = bad_hi + (good - bad_hi)/2;
 494         n = read_sectors(src, pos, buf, 1);
 495         if (n > 0) good = pos;
 496         else bad_hi = pos + 1;
 497       }
 498     recovered:
 499       if (bad_hi > bad_lo) {
 500         clear_progress();
 501         fprintf(stderr, "%s: skipping %"PRIu32" bad sectors "
 502                 "(%"PRIu32" .. %"PRIu32")\n",
 503                 prog, bad_hi - bad_lo, bad_lo, bad_hi);
 504         if (src->mapfile) {
 505           if (!src->mapfp) {
 506             src->mapfp = fopen(src->mapfile, "w");
 507             if (!src->mapfp)
 508               bail_syserr(errno, "failed to open bad-sector map file `%s'",
 509                           optarg);
 510             fprintf(src->mapfp, "## bad sector map\n\n");
 511           }
 512           fprintf(src->mapfp, "%"PRIu32" %"PRIu32"\n", bad_lo, bad_hi);
 513           fflush(src->mapfp);
 514           if (ferror(src->mapfp))
 515             bail_syserr(errno, "error writing bad-sector map file");
 516         }
 517         if (outfd >= 0 &&
 518             lseek(outfd, (off_t)(bad_hi - bad_lo)*SECTORSZ, SEEK_CUR) < 0)
 519           bail_syserr(errno, "failed to seek past bad sectors");
 520         status = 1;
 521       }
 522       pos = bad_hi;
 523     }
 524
 525     if (n > 0) { carefully_write(outfd, buf, n*SECTORSZ); pos += n; }
 526     report_progress(src, pos); fflush(stdout);
 527   }
 528
 529   if (src->vob) { DVDCloseFile(src->vob); src->vob = 0; }
 530
 531 #undef BUFSECTORS
 532 }
 533
 534 #ifdef notdef
 535 static void logfn(void *p, dvd_logger_level_t lev,
 536                   const char *fmt, va_list ap)
 537 {
 538   switch (lev) {
 539     case DVD_LOGGER_LEVEL_ERROR:
 540       fprintf("%s (libdvdread error): ", prog);
 541       break;
 542     case DVD_LOGGER_LEVEL_WARN:
 543       fprintf("%s (libdvdread warning): ", prog);
 544       break;
 545     default:
 546       return;
 547   }
 548   vfprintf(stderr, fmt, ap);
 549   fputc('\n', stderr);
 550 }
 551 static const dvd_logger_cb logger = { logfn };
 552 #endif
 553
 554 struct buf {
 555   char *p;
 556   size_t n, sz;
 557 };
 558 #define BUF_INIT { 0, 0, 0 }
 559 #define BUF_REWIND(b) do { (b)->n = 0; } while (0)
 560 #define BUF_FREE(b) do {                                                \
 561   buf *_b = (b);                                                        \
 562   free(_b->p); _b->p = 0; _b->n = _b->sz = 0;                           \
 563 } while (0)
 564 #define BUF_PUTC(b, ch) do {                                            \
 565   struct buf *_b = (b);                                                 \
 566   if (_b->n >= _b->sz) {                                                \
 567     _b->sz = _b->sz ? 2*_b->sz : 32;                                    \
 568     _b->p = realloc(_b->p, _b->sz);                                     \
 569     if (!_b->p) bail("out of memory allocating %zu bytes", _b->sz);     \
 570   }                                                                     \
 571   _b->p[_b->n] = (ch);                                                  \
 572 } while (0)
 573
 574 static int read_line(FILE *fp, struct buf *b)
 575 {
 576   int ch;
 577
 578   ch = getc(fp);
 579   if (ch == EOF)
 580     return (-1);
 581   else if (ch != '\n') do {
 582     BUF_PUTC(b, ch); b->n++;
 583     ch = getc(fp);
 584   } while (ch != EOF && ch != '\n');
 585   BUF_PUTC(b, 0);
 586   return (0);
 587 }
 588
 589 int main(int argc, char *argv[])
 590 {
 591   unsigned f = 0;
 592   char *p;
 593   uint64_t volsz;
 594   uint32_t pos;
 595   off_t off;
 596   struct source src = SOURCE_INIT;
 597   unsigned long start, end;
 598   const struct event *ev;
 599   const char *device = "/dev/dvd", *outfile = 0;
 600   int opt, err, outfd = -1, blksz;
 601   unsigned n;
 602   size_t i;
 603   FILE *fp;
 604   struct buf buf = BUF_INIT;
 605 #ifdef DEBUG
 606   const struct file *file;
 607   char fn[MAXFNSZ];
 608 #endif
 609
 610 #define f_bogus 1u
 611 #define f_continue 2u
 612 #define f_fixup 4u
 613 #define f_write 256u
 614
 615   p = strrchr(argv[0], '/'); prog = p ? p + 1 : argv[0];
 616   for (;;) {
 617     opt = getopt(argc, argv, "hD:FR:b:co:r:"); if (opt < 0) break;
 618     switch (opt) {
 619       case 'h': usage(stderr); exit(0);
 620       case 'D': device = optarg; break;
 621       case 'F': f |= f_fixup; break;
 622       case 'R':
 623         fp = fopen(optarg, "r");
 624         if (!fp)
 625           bail_syserr(errno, "failed to open ranges file `%s'", optarg);
 626         i = 0;
 627         for (;;) {
 628           BUF_REWIND(&buf); if (read_line(fp, &buf)) break;
 629           p = buf.p; i++;
 630           while (ISSPACE(*p)) p++;
 631           if (!*p || *p == '#') continue;
 632           if (!ISDIGIT(*p)) goto bad_range_file;
 633           start = strtoul(p, &p, 0);
 634           if (errno || !ISSPACE(*p)) goto bad_range_file;
 635           do p++; while (ISSPACE(*p));
 636           if (!ISDIGIT(*p)) goto bad_range_file;
 637           end = strtoul(p, &p, 0);
 638           if (errno || (*p && !ISSPACE(*p))) goto bad_range_file;
 639           while (ISSPACE(*p)) p++;
 640           if (*p) goto bad_range_file;
 641           if (start > end) goto bad_range_file;
 642           if (start < end) {
 643             put_event(EV_WRITE, 0, start);
 644             put_event(EV_STOP, 0, end);
 645           }
 646         }
 647         if (ferror(fp))
 648           bail_syserr(errno, "failed to read ranges file `%s'", optarg);
 649         break;
 650       bad_range_file:
 651         bail("bad range `%s' at `%s' line %zu", buf.p, optarg, i);
 652       case 'b':
 653         if (src.mapfile) bail("can't have multiple map files");
 654         src.mapfile = optarg;
 655         break;
 656       case 'c': f |= f_continue; break;
 657       case 'o': outfile = optarg; break;
 658       case 'r':
 659         err = errno; errno = 0;
 660         p = optarg;
 661         if (*p == '-')
 662           start = 0;
 663         else {
 664           if (!ISDIGIT(*p)) goto bad_range;
 665           start = strtoul(p, &p, 0);
 666           if (errno || *p != '-') goto bad_range;
 667         }
 668         p++;
 669         if (!*p)
 670           put_event(EV_WRITE, 0, start);
 671         else {
 672           if (!ISDIGIT(*p)) goto bad_range;
 673           end = strtoul(p, &p, 0);
 674           if (errno || *p) goto bad_range;
 675           if (start > end) goto bad_range;
 676           if (start < end) {
 677             put_event(EV_WRITE, 0, start);
 678             put_event(EV_STOP, 0, end);
 679           }
 680         }
 681         errno = err;
 682         break;
 683       bad_range:
 684         bail("bad range `%s'", optarg);
 685         break;
 686       default: f |= f_bogus; break;
 687     }
 688   }
 689   if (optind < argc) f |= f_bogus;
 690   if (f&f_bogus) { usage(stderr); exit(2); }
 691
 692   src.dvdfd = open(device, O_RDONLY);
 693   if (src.dvdfd < 0) bail_syserr(errno, "failed to open device `%s'", device);
 694   if (ioctl(src.dvdfd, BLKSSZGET, &blksz))
 695     bail_syserr(errno, "failed to get block size for `%s'", device);
 696   if (ioctl(src.dvdfd, BLKGETSIZE64, &volsz))
 697     bail_syserr(errno, "failed to get volume size for `%s'", device);
 698
 699   if (blksz != SECTORSZ)
 700     bail("device `%s' block size %d /= %d", device, blksz, SECTORSZ);
 701   if (volsz%SECTORSZ)
 702     bail("device `%s' volume size %"PRIu64" not a multiple of %d",
 703          device, volsz, SECTORSZ);
 704
 705   if (outfile) {
 706     outfd = open(outfile, O_WRONLY | O_CREAT, 0666);
 707     if (outfd < 0)
 708       bail_syserr(errno, "failed to create output file `%s'", outfile);
 709   }
 710
 711   if (f&f_continue) {
 712     if (!outfile) bail("can't continue without output file");
 713     off = lseek(outfd, 0, SEEK_END);
 714     if (off < 0)
 715       bail_syserr(errno, "failed to seek to end of output file `%s'",
 716                   outfile);
 717     put_event(EV_WRITE, 0, off/SECTORSZ);
 718   } else if (!eventq.n && !(f&f_fixup))
 719     put_event(EV_WRITE, 0, 0);
 720
 721 #ifdef notdef
 722   src.dvd = DVDOpen2(0, &logger, device);
 723 #else
 724   src.dvd = DVDOpen(device);
 725 #endif
 726   if (!src.dvd) bail("failed to open DVD on `%s'", device);
 727
 728   /* It's fast enough just to check everything. */
 729   put_menu(src.dvd, 0);
 730   for (i = 1; i < 100; i++) {
 731     put_menu(src.dvd, i);
 732     put_title(src.dvd, i);
 733   }
 734   put_file(mkident(RAW, 0, 0), 0, volsz/SECTORSZ);
 735   assert(filetab.n <= MAXFILES);
 736
 737   for (i = 0, src.limit = 0; i < filetab.n; i++)
 738     if (filetab.v[i].end > src.limit) src.limit = filetab.v[i].end;
 739
 740   if (end > src.limit) end = src.limit;
 741
 742 #ifdef DEBUG
 743   printf("\n;; files:\n");
 744   for (i = 0; i < filetab.n; i++) {
 745     file = &filetab.v[i];
 746     store_filename(fn, file->id);
 747     printf(";;\t%8"PRIu32" %s\n", file->start, fn);
 748   }
 749 #endif
 750
 751   qsort(eventq.v, eventq.n, sizeof(struct event), compare_event);
 752
 753   f &= ~f_write; start = 0; n = 0;
 754   for (i = 0; i < eventq.n; i++) {
 755     ev = &eventq.v[i];
 756     switch (ev->ev) {
 757       case EV_WRITE:
 758         if (f&f_write)
 759           bail("overlapping ranges: range from %lu still open at %"PRIu32"",
 760                start, ev->pos);
 761         n++; f |= f_write; start = ev->pos;
 762         break;
 763       case EV_STOP:
 764         f &= ~f_write;
 765         break;
 766     }
 767   }
 768
 769   f &= ~f_write; start = 0;
 770   for (i = 0; i < eventq.n; i++) {
 771     ev = &eventq.v[i];
 772     switch (ev->ev) {
 773       case EV_WRITE: start = ev->pos; f |= f_write; break;
 774       case EV_STOP: src.nsectors += ev->pos - start; f &= ~f_write; break;
 775     }
 776     if (ev->pos >= src.limit) break;
 777     if (f&f_fixup) start = ev->pos;
 778   }
 779   eventq.n = i;
 780   if (f&f_fixup) {
 781     put_event(EV_WRITE, 0, start);
 782     n++; f |= f_write;
 783   }
 784   if (f&f_write) {
 785     src.nsectors += src.limit - start;
 786     put_event(EV_STOP, 0, src.limit);
 787   }
 788   if (n == 1 && (f&f_write))
 789     src.f |= SRCF_ALLPROGRESS;
 790   f &= ~f_write;
 791
 792 #ifdef DEBUG
 793   printf("\n;; event sweep:\n");
 794 #endif
 795   for (pos = 0, i = 0; i < eventq.n; i++) {
 796     ev = &eventq.v[i];
 797     if (ev->pos > pos) {
 798       if (f&f_write) emit(&src, outfd, pos, ev->pos);
 799       pos = ev->pos;
 800 #ifdef DEBUG
 801       clear_progress();
 802       printf(";;\n");
 803 #endif
 804     }
 805     switch (ev->ev) {
 806       case EV_BEGIN:
 807         set_live(ev->file);
 808 #ifdef DEBUG
 809         store_filename(fn, filetab.v[ev->file].id);
 810         clear_progress();
 811         printf(";; %8"PRIu32": begin `%s'\n", pos, fn);
 812 #endif
 813         break;
 814       case EV_WRITE:
 815         gettimeofday(&src.last_time, 0); src.last_pos = pos;
 816         if (outfd >= 0 &&
 817             lseek(outfd, (off_t)ev->pos*SECTORSZ, SEEK_SET) < 0)
 818           bail_syserr(errno,
 819                       "failed to seek to resume position "
 820                       "(sector %"PRIu32") in output file `%s'",
 821                       ev->pos, outfile);
 822 #ifdef DEBUG
 823         clear_progress();
 824         printf(";; %8"PRIu32": begin write\n", pos);
 825 #endif
 826         f |= f_write;
 827         break;
 828       case EV_STOP:
 829         f &= ~f_write;
 830 #ifdef DEBUG
 831         clear_progress();
 832         printf(";; %8"PRIu32": end write\n", pos);
 833 #endif
 834         break;
 835       case EV_END:
 836         clear_live(ev->file);
 837 #ifdef DEBUG
 838         store_filename(fn, filetab.v[ev->file].id);
 839         clear_progress();
 840         printf(";; %8"PRIu32": end `%s'\n", pos, fn);
 841 #endif
 842         break;
 843       default: abort();
 844     }
 845   }
 846
 847   if (progresslen) putchar('\n');
 848
 849   if (outfd >= 0 && ftruncate(outfd, (off_t)src.limit*SECTORSZ) < 0)
 850     bail_syserr(errno, "failed to set output file `%s' length", outfile);
 851
 852   if (src.dvd) DVDClose(src.dvd);
 853   if (src.dvdfd >= 0) close(src.dvdfd);
 854   if (outfd >= 0) close(outfd);
 855   if (src.mapfp) {
 856     if (ferror(src.mapfp) || fclose(src.mapfp))
 857       bail_syserr(errno, "error writing bad-sector map file");
 858   }
 859
 860 #undef f_bogus
 861 #undef f_continue
 862 #undef f_fixup
 863 #undef f_write
 864
 865   return (status);
 866 }