mdw@git.distorted.org.uk Git - dvdrip/blob - lib.c

   1 #include "lib.h"
   2
   3 const char *prog = "<unset>";
   4
   5 void set_prog(const char *p)
   6   { const char *q = strrchr(p, '/'); prog = q ? q + 1 : p; }
   7
   8 void vmoan(const char *fmt, va_list ap)
   9   { vmoan_syserr(0, fmt, ap); }
  10
  11 void vmoan_syserr(int err, const char *fmt, va_list ap)
  12 {
  13   fprintf(stderr, "%s: ", prog);
  14   vfprintf(stderr, fmt, ap);
  15   if (err) fprintf(stderr, ": %s", strerror(errno));
  16   fputc('\n', stderr);
  17 }
  18
  19 void moan(const char *fmt, ...)
  20   { va_list ap; va_start(ap, fmt); vmoan(fmt, ap); va_end(ap); }
  21
  22 void moan_syserr(int err, const char *fmt, ...)
  23   { va_list ap; va_start(ap, fmt); vmoan_syserr(err, fmt, ap); va_end(ap); }
  24
  25 void bail(const char *fmt, ...)
  26   { va_list ap; va_start(ap, fmt); vmoan(fmt, ap); va_end(ap); exit(2); }
  27
  28 void bail_syserr(int err, const char *fmt, ...)
  29 {
  30   va_list ap;
  31
  32   va_start(ap, fmt); vmoan_syserr(err, fmt, ap); va_end(ap);
  33   exit(2);
  34 }
  35
  36 void sit(double t)
  37 {
  38   struct timeval tv;
  39   double whole = floor(t);
  40
  41   if (t) {
  42     tv.tv_sec = whole; tv.tv_usec = floor((t - whole)*1.0e6) + 1;
  43     if (select(0, 0, 0, 0, &tv) < 0) bail_syserr(errno, "failed to sleep");
  44   }
  45 }
  46
  47 void carefully_write(int fd, const void *buf, size_t sz)
  48 {
  49   const unsigned char *p = buf;
  50   ssize_t n;
  51
  52   if (fd < 0) return;
  53   while (sz) {
  54     n = write(fd, p, sz);
  55     if (n < 0) {
  56       if (errno == EINTR) continue;
  57       bail_syserr(errno, "failed to write to output file");
  58     }
  59     if (!n) bail("unexpected short write to output file");
  60     p += n; sz -= n;
  61   }
  62 }
  63
  64 void open_file_on_demand(const char *file, FILE **fp_inout, const char *what)
  65 {
  66   FILE *fp;
  67
  68   if (!*fp_inout) {
  69     fp = fopen(file, "w");
  70     if (!fp) bail_syserr(errno, "failed to open %s file `%s'", what, file);
  71     fprintf(fp, "## %s\n\n", what);
  72     *fp_inout = fp;
  73   }
  74 }
  75
  76 void check_write(FILE *fp, const char *what)
  77 {
  78   fflush(fp);
  79   if (ferror(fp)) bail_syserr(errno, "error writing %s file", what);
  80 }
  81
  82 void carefully_fclose(FILE *fp, const char *what)
  83 {
  84   if (fp && (ferror(fp) || fclose(fp)))
  85     bail_syserr(errno, "error writing %s file", what);
  86 }
  87
  88 off_t device_size(int fd, const char *file, int *blksz_out)
  89 {
  90   struct stat st;
  91   uint64_t volsz;
  92
  93   if (fstat(fd, &st))
  94     bail_syserr(errno, "failed to obtain status for `%s'", file);
  95   if (S_ISREG(st.st_mode))
  96     volsz = st.st_size;
  97   else if (S_ISBLK(st.st_mode)) {
  98     if (ioctl(fd, BLKGETSIZE64, &volsz))
  99       bail_syserr(errno, "failed to get volume size for `%s'", file);
 100     if (ioctl(fd, BLKSSZGET, blksz_out))
 101       bail_syserr(errno, "failed to get block size for `%s'", file);
 102   } else
 103     bail("can't read size for `%s': expected file or block device", file);
 104   return ((off_t)volsz);
 105 }
 106
 107 void store_filename(char *buf, ident id)
 108 {
 109   switch (id_kind(id)) {
 110     case RAW:
 111       sprintf(buf, "#<raw device>");
 112       break;
 113     case IFO:
 114       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.IFO");
 115       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.IFO", id_title(id));
 116       break;
 117     case BUP:
 118       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.BUP");
 119       else sprintf(buf, "/VIDEO_TS/VTS_%02u_0.BUP", id_title(id));
 120       break;
 121     case VOB:
 122       if (!id_title(id)) sprintf(buf, "/VIDEO_TS/VIDEO_TS.VOB");
 123       else
 124         sprintf(buf, "/VIDEO_TS/VTS_%02u_%u.VOB", id_title(id), id_part(id));
 125       break;
 126     default:
 127       abort();
 128   }
 129 }
 130
 131 static char *copy_string(char *p, const char *q)
 132 {
 133   while (*q) *p++ = *q++;
 134   *p = 0; return (p);
 135 }
 136
 137 static char *copy_hex(char *p, const unsigned char *q, size_t sz)
 138 {
 139   while (sz) {
 140     sprintf(p, "%02x", *q);
 141     p += 2; q++; sz--;
 142   }
 143   return (p);
 144 }
 145
 146 int dvd_id(char *p, dvd_reader_t *dvd, unsigned f, const char *file)
 147 {
 148   char volid[33];
 149   unsigned char volsetid[16], discid[16];
 150   int rc;
 151   size_t n;
 152
 153   rc = DVDUDFVolumeInfo(dvd,
 154                         volid, sizeof(volid),
 155                         volsetid, sizeof(volsetid));
 156   if (!rc) {
 157     p = copy_string(p, volid);
 158     *p++ = '-';
 159     for (n = sizeof(volsetid); n && !volsetid[n - 1]; n--);
 160     p = copy_hex(p, volsetid, n);
 161   } else if (f&DIF_MUSTVOLINF) {
 162     if (file) moan("failed to read volume info for `%s'", file);
 163     else moan("failed to read volume info");
 164     return (-1);
 165   } else
 166     p = copy_string(p, "<error reading volume info>");
 167
 168   *p++ = ':';
 169   rc = DVDDiscID(dvd, discid);
 170   if (!rc)
 171     p = copy_hex(p, discid, sizeof(discid));
 172   else if (f&DIF_MUSTIFOHASH) {
 173     if (file) moan("failed to determine disc id of `%s'", file);
 174     else moan("failed to determine disc id");
 175     return (-1);
 176   } else
 177     p = copy_string(p, "<error reading disc-id>");
 178
 179   return (0);
 180 }
 181
 182 struct progress_state progress = PROGRESS_STATE_INIT;
 183 static struct banner_progress_item banner_progress;
 184
 185 static void render_banner_progress(struct progress_item *item,
 186                             struct progress_render_state *render)
 187 {
 188   struct banner_progress_item *bi = (struct banner_progress_item *)item;
 189
 190   progress_putleft(render, " %s", bi->msg);
 191   progress_shownotice(render, 4, 7);
 192 }
 193
 194 void show_banner(const char *msg)
 195 {
 196   banner_progress._base.render = render_banner_progress;
 197   progress_additem(&progress, &banner_progress._base);
 198   banner_progress.msg = msg;
 199   progress_update(&progress);
 200 }
 201
 202 void hide_banner(void)
 203 {
 204   if (!progress_removeitem(&progress, &banner_progress._base))
 205     progress_update(&progress);
 206 }
 207
 208 #ifdef notdef
 209 static void logfn(void *p, dvd_logger_level_t lev,
 210                   const char *fmt, va_list ap)
 211 {
 212   switch (lev) {
 213     case DVD_LOGGER_LEVEL_ERROR:
 214       fprintf("%s (libdvdread error): ", prog);
 215       break;
 216     case DVD_LOGGER_LEVEL_WARN:
 217       fprintf("%s (libdvdread warning): ", prog);
 218       break;
 219     default:
 220       return;
 221   }
 222   vfprintf(stderr, fmt, ap);
 223   fputc('\n', stderr);
 224 }
 225 static const dvd_logger_cb logger = { logfn };
 226 #endif
 227
 228 void open_dvd(const char *device, int *fd_out, dvd_reader_t **dvd_out)
 229 {
 230   int fd;
 231   dvd_reader_t *dvd;
 232   int bannerp = 0;
 233
 234   for (;;) {
 235     fd = open(device, O_RDONLY);
 236     if (fd >= 0 || errno != ENOMEDIUM) break;
 237     if (!bannerp) {
 238       show_banner("Waiting for disc to be inserted...");
 239       bannerp = 1;
 240     }
 241     sit(0.2);
 242   }
 243   if (bannerp) hide_banner();
 244   if (fd < 0) bail_syserr(errno, "failed to open device `%s'", device);
 245   if (dvd_out) {
 246 #ifdef notdef
 247     dvd = DVDOpen2(0, &logger, device);
 248 #else
 249     dvd = DVDOpen(device);
 250 #endif
 251     if (!dvd) bail("failed to open DVD on `%s'", device);
 252     *dvd_out = dvd;
 253   }
 254   if (fd_out) *fd_out = fd;
 255   else close(fd);
 256 }