compilers/bcc/linux86-0.16.17/bootblocks/fs.c

   1
   2 #include "monitor.h"
   3
   4 #ifndef SINGLEFS
   5
   6 int fs_type = 0;
   7
   8 open_file(fname)
   9 char * fname;
  10 {
  11 #ifdef DEBUG
  12    fprintf(stderr, "Open file %s\n", fname);
  13 #endif
  14    if( fs_type ) close_file();
  15
  16    /* If we can't read the boot sector there is a _real_ problem */
  17    if (read_sector(0) == 0) return -1;
  18
  19    if( tar_open_file(fname) >= 0 ) { fs_type = 1; return 0; }
  20    if( min_open_file(fname) >= 0 ) { fs_type = 2; return 0; }
  21    if( dos_open_file(fname) >= 0 ) { fs_type = 3; return 0; }
  22    return -1;
  23 }
  24
  25 rewind_file()
  26 {
  27 #ifdef DEBUG
  28    fprintf(stderr, "Rewind file (%d)\n", fs_type);
  29 #endif
  30    switch(fs_type)
  31    {
  32    case 1: return tar_rewind_file();
  33    case 2: return min_rewind_file();
  34    case 3: return dos_rewind_file();
  35    }
  36    return -1;
  37 }
  38
  39 close_file()
  40 {
  41    int rv = -1;
  42 #ifdef DEBUG
  43    fprintf(stderr, "Close file (%d)\n", fs_type);
  44 #endif
  45    switch(fs_type)
  46    {
  47    case 1: rv = tar_close_file(); break;
  48    case 2: rv = min_close_file(); break;
  49    case 3: rv = dos_close_file(); break;
  50    }
  51    fs_type = 0;
  52    return rv;
  53 }
  54
  55 long
  56 file_length()
  57 {
  58 #ifdef DEBUG
  59    fprintf(stderr, "File length (%d)\n", fs_type);
  60 #endif
  61    switch(fs_type)
  62    {
  63    case 1: return tar_file_length();
  64    case 2: return min_file_length();
  65    case 3: return dos_file_length();
  66    }
  67    return -1;
  68 }
  69
  70 read_block(buffer)
  71 char * buffer;
  72 {
  73 #ifdef DEBUG
  74    fprintf(stderr, "read block into (%d) (%d)\n", buffer, fs_type);
  75 #endif
  76    switch(fs_type)
  77    {
  78    case 1: return tar_read_block(buffer);
  79    case 2: return min_read_block(buffer);
  80    case 3: return dos_read_block(buffer);
  81    }
  82    return -1;
  83 }
  84
  85 #endif