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 static void carefully_write(int fd, const void *buf, size_t sz)
  85 {
  86   const unsigned char *p = buf;
  87   ssize_t n;
  88
  89   if (fd < 0) return;
  90   while (sz) {
  91     n = write(fd, p, sz);
  92     if (n < 0) {
  93       if (errno == EINTR) continue;
  94       bail_syserr(errno, "failed to write to output file");
  95     }
  96     if (!n) bail("unexpected short write to output file");
  97     p += n; sz -= n;
  98   }
  99 }
 100
 101 #define DEFVEC(vtype, etype)                                            \
 102         typedef struct { etype *v; size_t n, sz; } vtype
 103 #define VEC_INIT { 0, 0, 0 }
 104 #define VEC_FREE(vv) do {                                               \
 105   free((vv)->v); (vv)->v 0; (vv)->n = (vv)->sz = 0;                     \
 106 } while (0)
 107 #define VEC_PUSH(p, vv) do {                                            \
 108   size_t _want;                                                         \
 109   if ((vv)->n >= (vv)->sz) {                                            \
 110     (vv)->sz = (vv)->sz ? 2*(vv)->sz : 32;                              \
 111     _want = (vv)->sz*sizeof(*(vv)->v);                                  \
 112     (vv)->v = realloc((vv)->v, _want);                                  \
 113     if (!(vv)->v) bail("out of memory allocating %zu bytes", _want);    \
 114   }                                                                     \
 115   (p) = &(vv)->v[(vv)->n++];                                            \
 116 } while (0)
 117
 118 enum { RAW, IFO, VOB, BUP };
 119 typedef uint_least32_t ident;
 120
 121 static inline ident mkident(unsigned kind, unsigned title, unsigned part)
 122   { return (((ident)kind << 0) | ((ident)title << 8) | ((ident)part << 16)); }
 123 static inline unsigned id_kind(ident id) { return ((id >> 0)&0x0ff); }
 124 static inline unsigned id_title(ident id) { return ((id >> 8)&0x0ff); }
 125 static inline unsigned id_part(ident id) { return ((id >> 16)&0x0ff); }
 126
 127 #define MAXFNSZ (1 + 8 + 1 + 12 + 1)
 128
 129 static void store_filename(char *buf, ident id)
 130 {
 131   switch (id_kind(id)) {
 132     case RAW:
 133       sprintf(buf, "#<raw device>");
 134       break;
 135     case IFO:
 136       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.IFO");
 137       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.IFO", id_title(id));
 138       break;
 139     case BUP:
 140       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.BUP");
 141       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.BUP", id_title(id));
 142       break;
 143     case VOB:
 144       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.VOB");
 145       else
 146         sprintf(buf, "/VIDEO_TS/VTS_%02u_%u.VOB", id_title(id), id_part(id));
 147       break;
 148     default:
 149       abort();
 150   }
 151 }
 152
 153 typedef uint_least32_t secaddr;
 154 #define PRIuSEC PRIuLEAST32
 155 #define SECLIMIT 0x00400000
 156
 157 #define MAXFILES (1 + 2*99 + 1)
 158 struct file {
 159   ident id;
 160   secaddr start, end;
 161 };
 162 DEFVEC(file_v, struct file);
 163 static file_v filetab = VEC_INIT;
 164
 165 enum { EV_STOP, EV_BEGIN, EV_END, EV_WRITE };
 166 struct event {
 167   unsigned char ev, file;
 168   secaddr pos;
 169 };
 170 DEFVEC(event_v, struct event);
 171 static event_v eventq = VEC_INIT;
 172
 173 static int compare_event(const void *a, const void *b)
 174 {
 175   const struct event *eva = a, *evb = b;
 176
 177   if (eva->pos < evb->pos) return (-1);
 178   else if (eva->pos > evb->pos) return (+1);
 179
 180   if (eva->ev < evb->ev) return (-1);
 181   else if (eva->ev > evb->ev) return (+1);
 182
 183   if (eva->file < evb->file) return (-1);
 184   else if (eva->file > evb->file) return (+1);
 185
 186   return (0);
 187 }
 188
 189 typedef uint_least32_t bits;
 190 static bits live[(MAXFILES + 31)/32];
 191
 192 static inline int livep(unsigned i)
 193   { return (live[i/32]&((bits)1 << (i%32))); }
 194 static inline void set_live(unsigned i)
 195   { live[i/32] |= (bits)1 << (i%32); }
 196 static inline void clear_live(unsigned i)
 197   { live[i/32] &= ~((bits)1 << (i%32)); }
 198 static inline int least_live(void)
 199 {
 200   unsigned i, n = (filetab.n + 32)/32;
 201   bits b;
 202
 203   for (i = 0; i < n; i++) { b = live[i]; if (b) goto found; }
 204   return (-1);
 205 found:
 206   i *= 32;
 207   if (!(b&0x0000ffff)) { b >>= 16; i += 16; }
 208   if (!(b&0x000000ff)) { b >>=  8; i +=  8; }
 209   if (!(b&0x0000000f)) { b >>=  4; i +=  4; }
 210   if (!(b&0x00000003)) { b >>=  2; i +=  2; }
 211   if (!(b&0x00000001)) { b >>=  1; i +=  1; }
 212   assert(b&1);
 213   return (i);
 214 }
 215
 216 static void put_event(unsigned evtype, unsigned file, secaddr pos)
 217 {
 218   struct event *ev;
 219
 220   VEC_PUSH(ev, &eventq);
 221   ev->ev = evtype; ev->file = file; ev->pos = pos;
 222 }
 223
 224 static void put_file(ident id, secaddr start, secaddr end)
 225 {
 226   struct file *f;
 227   size_t i;
 228
 229   VEC_PUSH(f, &filetab); i = f - filetab.v;
 230   f->id = id; f->start = start; f->end = end;
 231   put_event(EV_BEGIN, i, start);
 232   put_event(EV_END, i, end);
 233 }
 234
 235 static void put_menu(dvd_reader_t *dvd, unsigned title)
 236 {
 237   ident id = mkident(VOB, title, 0);
 238   char fn[MAXFNSZ];
 239   secaddr start, len;
 240
 241   store_filename(fn, id);
 242   start = UDFFindFile(dvd, fn, &len); if (!start) return;
 243 #ifdef DEBUG
 244       printf(";; %8"PRIuSEC" .. %-8"PRIuSEC": %s\n",
 245              start, start + SECTORS(len), fn);
 246 #endif
 247   put_file(id, start, start + SECTORS(len));
 248 }
 249
 250 static void put_title(dvd_reader_t *dvd, unsigned title)
 251 {
 252   char fn[MAXFNSZ];
 253   secaddr start[9], len[9];
 254   unsigned i, npart;
 255
 256   for (i = 0; i < 9; i++) {
 257     store_filename(fn, mkident(VOB, title, i + 1));
 258     start[i] = UDFFindFile(dvd, fn, &len[i]); if (!start[i]) break;
 259   }
 260   npart = i; if (!npart) return;
 261
 262 #ifdef DEBUG
 263   for (i = 0; i < npart; i++) {
 264     store_filename(fn, mkident(VOB, title, i + 1));
 265     printf(";; %8"PRIuSEC" .. %-8"PRIuSEC": %s\n",
 266            start[i], start[i] + SECTORS(len[i]), fn);
 267   }
 268 #endif
 269
 270   if (npart > 1)
 271     for (i = 0; i < npart - 1; i++) {
 272       if (len[i]%SECTORSZ)
 273         bail("title %u part %u length = %"PRIuSEC" not a multiple of %d",
 274              title, i, len[i], SECTORSZ);
 275       if (start[i] + len[i]/SECTORSZ != start[i + 1])
 276         bail
 277           ("title %u part %u end = %"PRIuSEC" /= part %u start = %"PRIuSEC"",
 278            title, i, start[i] + len[i]/SECTORSZ, i + 1, start[i + 1]);
 279     }
 280
 281   put_file(mkident(VOB, title, 1),
 282            start[0], start[npart - 1] + SECTORS(len[npart - 1]));
 283 }
 284
 285 static int progresslen = 0;
 286
 287 static void clear_progress_internal(void)
 288   { while (progresslen) { fputs("\b \b", stdout); progresslen--; } }
 289 static void clear_progress(void)
 290   { clear_progress_internal(); fflush(stdout); }
 291 static void vappend_progress(const char *fmt, va_list ap)
 292   { progresslen += vprintf(fmt, ap); }
 293 __attribute__((format(printf, 1, 2)))
 294 static void append_progress(const char *fmt, ...)
 295 {
 296   va_list ap;
 297
 298   va_start(ap, fmt);
 299   vappend_progress(fmt, ap);
 300   va_end(ap);
 301 }
 302 __attribute__((format(printf, 1, 2)))
 303 static void print_progress(const char *fmt, ...)
 304 {
 305   va_list ap;
 306
 307   va_start(ap, fmt);
 308   clear_progress_internal();
 309   vappend_progress(fmt, ap);
 310   va_end(ap);
 311 }
 312
 313 unsigned flags;
 314 #  define F_ALLPROGRESS 1u
 315 static secaddr last_pos, limit, nsectors, ndone;
 316 static struct timeval last_time;
 317 static double wsum, wcount;
 318 static struct file *file;
 319
 320 static void report_progress(secaddr pos)
 321 {
 322   char etastr[32];
 323   struct timeval now;
 324   int eta;
 325   double percent, t, f, g, rate;
 326   char *unit;
 327
 328 #define ALPHA 0.02
 329 #define BETA (1 - ALPHA)
 330
 331   gettimeofday(&now, 0);
 332   t = (now.tv_sec - last_time.tv_sec) +
 333     (now.tv_usec - last_time.tv_usec)/1000000.0;
 334
 335   if (t) {
 336     g = wcount ? pow(BETA, t) : 0.0; f = (1 - g)/(1 - BETA);
 337     wsum = f*(pos - last_pos)/t + g*wsum;
 338     wcount = f + g*wcount;
 339     ndone += pos - last_pos;
 340     last_time = now; last_pos = pos;
 341   }
 342
 343   if (!wsum || !wcount)
 344     { rate = 0; strcpy(etastr, "???"); }
 345   else {
 346     rate = wsum/wcount;
 347     eta = (int)((nsectors - ndone)/rate);
 348     sprintf(etastr, "%d:%02d:%02d", eta/3600, (eta/60)%60, eta%60);
 349   }
 350
 351   rate *= SECTORSZ; unit = "";
 352   if (rate > 128) { rate /= 1024; unit = "k"; }
 353   if (rate > 128) { rate /= 1024; unit = "M"; }
 354   if (rate > 128) { rate /= 1024; unit = "G"; }
 355
 356   if (flags&F_ALLPROGRESS) percent = pos*100.0/limit;
 357   else percent = ndone*100.0/nsectors;
 358   print_progress
 359     ("copied %.1f%% (%"PRIuSEC" of %"PRIuSEC"; %.1f %sB/s, ETA %s)",
 360      percent, pos, limit,  rate, unit, etastr);
 361   if (file && id_kind(file->id) == VOB) {
 362     append_progress(" -- %s %d %3.1f%%",
 363                     id_part(file->id) ? "title" : "menu",
 364                     id_title(file->id),
 365                     (pos - file->start)*100.0/
 366                       (file->end - file->start));
 367   }
 368
 369 #undef ALPHA
 370 #undef BETA
 371 }
 372
 373 static void report_bad_blocks_progress(secaddr lo, secaddr hi, int err)
 374 {
 375   report_progress(hi);
 376
 377   if (lo == hi) append_progress(": retrying bad sector");
 378   else
 379     append_progress(": %"PRIuSEC" bad %s",
 380                     hi - lo, hi == lo + 1 ? "sector" : "sectors");
 381   if (err != EIO) append_progress(" (%s)", strerror(err));
 382   fflush(stdout);
 383 }
 384
 385 static dvd_reader_t *dvd;
 386 static int dvdfd = -1, outfd = -1;
 387 static dvd_file_t *vob;
 388 static const char *mapfile; static FILE *mapfp;
 389
 390 static ssize_t read_sectors(secaddr pos, void *buf, secaddr want)
 391 {
 392   ssize_t n;
 393
 394 again:
 395   if (vob)
 396     n = DVDReadBlocks(vob, pos - file->start, want, buf);
 397   else if (file) {
 398     if (lseek(dvdfd, (off_t)pos*SECTORSZ, SEEK_SET) < 0)
 399       bail_syserr(errno, "failed to seek to sector %"PRIuSEC"", pos);
 400     n = read(dvdfd, buf, want*SECTORSZ);
 401     if (n >= 0) n /= SECTORSZ;
 402   } else {
 403     memset(buf, 0, want*SECTORSZ);
 404     n = want;
 405   }
 406
 407   if (n < 0 && errno == EINTR) goto again;
 408   return (n);
 409 }
 410
 411 static void emit(secaddr start, secaddr end)
 412 {
 413 #define BUFSECTORS 512
 414
 415   int least, i;
 416   unsigned char buf[BUFSECTORS*SECTORSZ];
 417   secaddr pos;
 418   secaddr bad_lo, bad_hi, good, step;
 419   size_t want;
 420   ssize_t n;
 421   static int first_time = 1;
 422 #ifdef DEBUG
 423   struct file *f;
 424   char fn[MAXFNSZ];
 425   int act = -1;
 426 #endif
 427
 428   least = least_live();
 429
 430 #ifdef DEBUG
 431   printf(";; %8"PRIuSEC" .. %"PRIuSEC"\n", start, end);
 432
 433   for (i = 0; i < filetab.n; i++) {
 434     if (!livep(i)) continue;
 435     if (act == -1) act = i;
 436     f = &filetab.v[i]; store_filename(fn, f->id);
 437     printf(";;\t\t%8"PRIuSEC" .. %-8"PRIuSEC" %s\n",
 438            start - f->start, end - f->start, fn);
 439   }
 440   if (act == -1) printf(";;\t\t#<no live source>\n");
 441   assert(act == least);
 442 #endif
 443
 444   if (least == -1)
 445     { file = 0; vob = 0; }
 446   else {
 447     file = &filetab.v[least];
 448     switch (id_kind(file->id)) {
 449       case RAW:
 450         vob = 0;
 451         break;
 452       case VOB:
 453         if (first_time) { clear_progress(); first_time = 0; }
 454         vob = DVDOpenFile(dvd, id_title(file->id),
 455                           id_part(file->id)
 456                             ? DVD_READ_TITLE_VOBS
 457                             : DVD_READ_MENU_VOBS);
 458         if (!vob)
 459           bail("failed to open %s %u",
 460                id_part(file->id) ? "title" : "menu",
 461                id_title(file->id));
 462         break;
 463       default:
 464         abort();
 465     }
 466   }
 467
 468   pos = start;
 469   while (pos < end) {
 470     want = end - pos; if (want > BUFSECTORS) want = BUFSECTORS;
 471     n = read_sectors(pos, buf, want);
 472
 473     if (n <= 0) {
 474       report_bad_blocks_progress(pos, pos, errno);
 475       for (i = 0; i < 4; i++) {
 476         n = read_sectors(pos, buf, 1);
 477         if (n > 0) {
 478           clear_progress();
 479           moan("sector %"PRIuSEC" read ok after retry", pos);
 480           bad_lo = bad_hi = pos;
 481           goto recovered;
 482         }
 483       }
 484
 485       bad_lo = pos; step = 1; bad_hi = pos + 1;
 486       for (;;) {
 487         report_bad_blocks_progress(bad_lo, bad_hi, errno);
 488         if (bad_hi >= end) {
 489           clear_progress();
 490           moan("giving up on this extent");
 491           n = 0; goto recovered;
 492         }
 493         step *= 2;
 494         if (step > end - bad_lo) step = end - bad_lo;
 495         pos = bad_lo + step - 1;
 496         n = read_sectors(pos, buf, 1);
 497         if (n > 0) break;
 498         bad_hi = pos + 1;
 499       }
 500
 501       good = pos;
 502       while (good > bad_hi) {
 503         report_bad_blocks_progress(bad_lo, bad_hi, errno);
 504         pos = bad_hi + (good - bad_hi)/2;
 505         n = read_sectors(pos, buf, 1);
 506         if (n > 0) good = pos;
 507         else bad_hi = pos + 1;
 508       }
 509     recovered:
 510       if (bad_hi > bad_lo) {
 511         clear_progress();
 512         moan("skipping %"PRIuSEC" bad sectors (%"PRIuSEC" .. %"PRIuSEC")",
 513              bad_hi - bad_lo, bad_lo, bad_hi);
 514         if (mapfile) {
 515           if (!mapfp) {
 516             mapfp = fopen(mapfile, "w");
 517             if (!mapfp)
 518               bail_syserr(errno, "failed to open bad-sector map file `%s'",
 519                           optarg);
 520             fprintf(mapfp, "## bad sector map\n\n");
 521           }
 522           fprintf(mapfp, "%"PRIuSEC" %"PRIuSEC"\n", bad_lo, bad_hi);
 523           fflush(mapfp);
 524           if (ferror(mapfp))
 525             bail_syserr(errno, "error writing bad-sector map file");
 526         }
 527         if (outfd >= 0 &&
 528             lseek(outfd, (off_t)(bad_hi - bad_lo)*SECTORSZ, SEEK_CUR) < 0)
 529           bail_syserr(errno, "failed to seek past bad sectors");
 530         status = 1;
 531       }
 532       pos = bad_hi;
 533     }
 534
 535     if (n > 0) { carefully_write(outfd, buf, n*SECTORSZ); pos += n; }
 536     report_progress(pos); fflush(stdout);
 537   }
 538
 539   if (vob) { DVDCloseFile(vob); vob = 0; }
 540
 541 #undef BUFSECTORS
 542 }
 543
 544 #ifdef notdef
 545 static void logfn(void *p, dvd_logger_level_t lev,
 546                   const char *fmt, va_list ap)
 547 {
 548   switch (lev) {
 549     case DVD_LOGGER_LEVEL_ERROR:
 550       fprintf("%s (libdvdread error): ", prog);
 551       break;
 552     case DVD_LOGGER_LEVEL_WARN:
 553       fprintf("%s (libdvdread warning): ", prog);
 554       break;
 555     default:
 556       return;
 557   }
 558   vfprintf(stderr, fmt, ap);
 559   fputc('\n', stderr);
 560 }
 561 static const dvd_logger_cb logger = { logfn };
 562 #endif
 563
 564 struct buf {
 565   char *p;
 566   size_t n, sz;
 567 };
 568 #define BUF_INIT { 0, 0, 0 }
 569 #define BUF_REWIND(b) do { (b)->n = 0; } while (0)
 570 #define BUF_FREE(b) do {                                                \
 571   buf *_b = (b);                                                        \
 572   free(_b->p); _b->p = 0; _b->n = _b->sz = 0;                           \
 573 } while (0)
 574 #define BUF_PUTC(b, ch) do {                                            \
 575   struct buf *_b = (b);                                                 \
 576   if (_b->n >= _b->sz) {                                                \
 577     _b->sz = _b->sz ? 2*_b->sz : 32;                                    \
 578     _b->p = realloc(_b->p, _b->sz);                                     \
 579     if (!_b->p) bail("out of memory allocating %zu bytes", _b->sz);     \
 580   }                                                                     \
 581   _b->p[_b->n] = (ch);                                                  \
 582 } while (0)
 583
 584 static int read_line(FILE *fp, struct buf *b)
 585 {
 586   int ch;
 587
 588   ch = getc(fp);
 589   if (ch == EOF)
 590     return (-1);
 591   else if (ch != '\n') do {
 592     BUF_PUTC(b, ch); b->n++;
 593     ch = getc(fp);
 594   } while (ch != EOF && ch != '\n');
 595   BUF_PUTC(b, 0);
 596   return (0);
 597 }
 598
 599 #define PRF_HYPHEN 1u
 600 static int parse_range(const char *p, unsigned f,
 601                        secaddr *start_out, secaddr *end_out)
 602 {
 603   char *q;
 604   int err, rc;
 605   unsigned long start, end;
 606
 607   err = errno;
 608
 609   if (ISDIGIT(*p)) {
 610     start = strtoul(p, &q, 0);
 611     if (errno || start >= SECLIMIT) { rc = -1; goto end; }
 612     *start_out = start; p = q;
 613   } else if (!(f&PRF_HYPHEN))
 614     { rc = -1; goto end; }
 615   else
 616     start = 0;
 617
 618   if (f&PRF_HYPHEN) {
 619     if (*p != '-')  { rc = -1; goto end; }
 620     p++;
 621   } else {
 622     if (!ISSPACE(*p)) { rc = -1; goto end; }
 623     do p++; while (ISSPACE(*p));
 624   }
 625
 626   if (ISDIGIT(*p)) {
 627     end = strtoul(p, &q, 0);
 628     if (errno || end > SECLIMIT || end < start) { rc = -1; goto end; }
 629     *end_out = end; p = q;
 630   } else if (!(f&PRF_HYPHEN))
 631     { rc = -1; goto end; }
 632
 633   if (!(f&PRF_HYPHEN)) while (ISSPACE(*p)) p++;
 634   if (*p) { rc = -1; goto end; }
 635
 636   rc = 0;
 637 end:
 638   errno = err;
 639   return (rc);
 640 }
 641
 642 int main(int argc, char *argv[])
 643 {
 644   unsigned f = 0;
 645   char *p;
 646   uint64_t volsz;
 647   secaddr pos;
 648   off_t off;
 649   secaddr start, end;
 650   const struct event *ev;
 651   const char *device = "/dev/dvd", *outfile = 0;
 652   int opt, blksz;
 653   unsigned n;
 654   size_t i;
 655   FILE *fp;
 656   struct buf buf = BUF_INIT;
 657   struct stat st;
 658 #ifdef DEBUG
 659   const struct file *file;
 660   char fn[MAXFNSZ];
 661 #endif
 662
 663 #define f_bogus 1u
 664 #define f_continue 2u
 665 #define f_fixup 4u
 666 #define f_write 256u
 667
 668   p = strrchr(argv[0], '/'); prog = p ? p + 1 : argv[0];
 669   for (;;) {
 670     opt = getopt(argc, argv, "hD:FR:b:co:r:"); if (opt < 0) break;
 671     switch (opt) {
 672       case 'h': usage(stderr); exit(0);
 673       case 'D': device = optarg; break;
 674       case 'F': f |= f_fixup; break;
 675       case 'R':
 676         fp = fopen(optarg, "r");
 677         if (!fp)
 678           bail_syserr(errno, "failed to open ranges file `%s'", optarg);
 679         i = 0;
 680         for (;;) {
 681           BUF_REWIND(&buf); if (read_line(fp, &buf)) break;
 682           p = buf.p; i++;
 683           while (ISSPACE(*p)) p++;
 684           if (!*p || *p == '#') continue;
 685           if (parse_range(p, 0, &start, &end) ||
 686               (last <= SECLIMIT && start < last))
 687             bail("bad range `%s' at `%s' line %zu", buf.p, optarg, i);
 688           if (start < end) {
 689             put_event(EV_WRITE, 0, start);
 690             put_event(EV_STOP, 0, end);
 691           }
 692         }
 693         if (ferror(fp))
 694           bail_syserr(errno, "failed to read ranges file `%s'", optarg);
 695         break;
 696       case 'b':
 697         if (mapfile) bail("can't have multiple map files");
 698         mapfile = optarg;
 699         break;
 700       case 'c': f |= f_continue; break;
 701       case 'o': outfile = optarg; break;
 702       case 'r':
 703         start = 0; end = -1;
 704         if (parse_range(optarg, PRF_HYPHEN, &start, &end))
 705           bail("bad range `%s'", optarg);
 706         if (start < end) {
 707           put_event(EV_WRITE, 0, start);
 708           if (end <= SECLIMIT) put_event(EV_STOP, 0, end);
 709         }
 710         break;
 711       default: f |= f_bogus; break;
 712     }
 713   }
 714   if (optind < argc) f |= f_bogus;
 715   if (f&f_bogus) { usage(stderr); exit(2); }
 716
 717   dvdfd = open(device, O_RDONLY);
 718   if (dvdfd < 0)
 719     bail_syserr(errno, "failed to open device `%s'", device);
 720   if (fstat(dvdfd, &st))
 721     bail_syserr(errno, "failed to stat device `%s'", device);
 722   if (S_ISREG(st.st_mode)) {
 723     blksz = SECTORSZ;
 724     volsz = st.st_size;
 725   } else if (S_ISBLK(st.st_mode)) {
 726     if (ioctl(dvdfd, BLKSSZGET, &blksz))
 727       bail_syserr(errno, "failed to get block size for `%s'", device);
 728     if (ioctl(dvdfd, BLKGETSIZE64, &volsz))
 729       bail_syserr(errno, "failed to get volume size for `%s'", device);
 730   } else
 731     bail("can't use `%s' as source: expected file or block device", device);
 732
 733   if (blksz != SECTORSZ)
 734     bail("device `%s' block size %d /= %d", device, blksz, SECTORSZ);
 735   if (volsz%SECTORSZ)
 736     bail("device `%s' volume size %"PRIu64" not a multiple of %d",
 737          device, volsz, SECTORSZ);
 738
 739   if (outfile) {
 740     outfd = open(outfile, O_WRONLY | O_CREAT, 0666);
 741     if (outfd < 0)
 742       bail_syserr(errno, "failed to create output file `%s'", outfile);
 743   }
 744
 745   if (f&f_continue) {
 746     if (!outfile) bail("can't continue without output file");
 747     off = lseek(outfd, 0, SEEK_END);
 748     if (off < 0)
 749       bail_syserr(errno, "failed to seek to end of output file `%s'",
 750                   outfile);
 751     put_event(EV_WRITE, 0, off/SECTORSZ);
 752   } else if (!eventq.n && !(f&f_fixup))
 753     put_event(EV_WRITE, 0, 0);
 754
 755 #ifdef notdef
 756   dvd = DVDOpen2(0, &logger, device);
 757 #else
 758   dvd = DVDOpen(device);
 759 #endif
 760   if (!dvd) bail("failed to open DVD on `%s'", device);
 761
 762   /* It's fast enough just to check everything. */
 763   put_menu(dvd, 0);
 764   for (i = 1; i < 100; i++) {
 765     put_menu(dvd, i);
 766     put_title(dvd, i);
 767   }
 768   put_file(mkident(RAW, 0, 0), 0, volsz/SECTORSZ);
 769   assert(filetab.n <= MAXFILES);
 770
 771   for (i = 0, limit = 0; i < filetab.n; i++)
 772     if (filetab.v[i].end > limit) limit = filetab.v[i].end;
 773
 774   if (end > limit) end = limit;
 775
 776 #ifdef DEBUG
 777   printf("\n;; files:\n");
 778   for (i = 0; i < filetab.n; i++) {
 779     file = &filetab.v[i];
 780     store_filename(fn, file->id);
 781     printf(";;\t%8"PRIuSEC" %s\n", file->start, fn);
 782   }
 783 #endif
 784
 785   qsort(eventq.v, eventq.n, sizeof(struct event), compare_event);
 786
 787   f &= ~f_write; start = 0; n = 0;
 788   for (i = 0; i < eventq.n; i++) {
 789     ev = &eventq.v[i];
 790     switch (ev->ev) {
 791       case EV_WRITE:
 792         if (f&f_write)
 793           bail("overlapping ranges: range from %"PRIuSEC" still open at %"PRIuSEC"",
 794                start, ev->pos);
 795         n++; f |= f_write; start = ev->pos;
 796         break;
 797       case EV_STOP:
 798         f &= ~f_write;
 799         break;
 800     }
 801   }
 802
 803   f &= ~f_write; start = 0;
 804   for (i = 0; i < eventq.n; i++) {
 805     ev = &eventq.v[i];
 806     switch (ev->ev) {
 807       case EV_WRITE: start = ev->pos; f |= f_write; break;
 808       case EV_STOP: nsectors += ev->pos - start; f &= ~f_write; break;
 809     }
 810     if (ev->pos >= limit) break;
 811     if (f&f_fixup) start = ev->pos;
 812   }
 813   eventq.n = i;
 814   if (f&f_fixup) {
 815     put_event(EV_WRITE, 0, start);
 816     n++; f |= f_write;
 817   }
 818   if (f&f_write) {
 819     nsectors += limit - start;
 820     put_event(EV_STOP, 0, limit);
 821   }
 822   if (n == 1 && (f&f_write)) flags |= F_ALLPROGRESS;
 823   f &= ~f_write;
 824
 825 #ifdef DEBUG
 826   printf("\n;; event sweep:\n");
 827 #endif
 828   for (pos = 0, i = 0; i < eventq.n; i++) {
 829     ev = &eventq.v[i];
 830     if (ev->pos > pos) {
 831       if (f&f_write) emit(pos, ev->pos);
 832       pos = ev->pos;
 833 #ifdef DEBUG
 834       clear_progress();
 835       printf(";;\n");
 836 #endif
 837     }
 838     switch (ev->ev) {
 839       case EV_BEGIN:
 840         set_live(ev->file);
 841 #ifdef DEBUG
 842         store_filename(fn, filetab.v[ev->file].id);
 843         clear_progress();
 844         printf(";; %8"PRIuSEC": begin `%s'\n", pos, fn);
 845 #endif
 846         break;
 847       case EV_WRITE:
 848         gettimeofday(&last_time, 0); last_pos = pos;
 849         if (outfd >= 0 &&
 850             lseek(outfd, (off_t)ev->pos*SECTORSZ, SEEK_SET) < 0)
 851           bail_syserr(errno,
 852                       "failed to seek to resume position "
 853                       "(sector %"PRIuSEC") in output file `%s'",
 854                       ev->pos, outfile);
 855 #ifdef DEBUG
 856         clear_progress();
 857         printf(";; %8"PRIuSEC": begin write\n", pos);
 858 #endif
 859         f |= f_write;
 860         break;
 861       case EV_STOP:
 862         f &= ~f_write;
 863 #ifdef DEBUG
 864         clear_progress();
 865         printf(";; %8"PRIuSEC": end write\n", pos);
 866 #endif
 867         break;
 868       case EV_END:
 869         clear_live(ev->file);
 870 #ifdef DEBUG
 871         store_filename(fn, filetab.v[ev->file].id);
 872         clear_progress();
 873         printf(";; %8"PRIuSEC": end `%s'\n", pos, fn);
 874 #endif
 875         break;
 876       default: abort();
 877     }
 878   }
 879
 880   if (progresslen) putchar('\n');
 881
 882   if (outfd >= 0 && ftruncate(outfd, (off_t)limit*SECTORSZ) < 0)
 883     bail_syserr(errno, "failed to set output file `%s' length", outfile);
 884
 885   if (dvd) DVDClose(dvd);
 886   if (dvdfd >= 0) close(dvdfd);
 887   if (outfd >= 0) close(outfd);
 888   if (mapfp) {
 889     if (ferror(mapfp) || fclose(mapfp))
 890       bail_syserr(errno, "error writing bad-sector map file");
 891   }
 892
 893 #undef f_bogus
 894 #undef f_continue
 895 #undef f_fixup
 896 #undef f_write
 897
 898   return (status);
 899 }