rc/bin/fstype

   1 #!/bin/rc
   2 rfork e
   3 m=`{dd -if $1 -bs 2048 -skip 16 >[2]/dev/null | xd -c | sed 1q | \
   4         sed 's/.........(....................).*/\1/; s/ //g'}
   5 if(~ $"m 01CD00101){
   6         echo 9660
   7         exit
   8 }
   9 fn fat {
  10         m=`{dd -if $1 -bs 1 -count 3 -skip $2 >[2]/dev/null}
  11         ~ $"m FAT
  12 }
  13 if(fat $1 54 || fat $1 82){
  14         echo dos
  15         exit
  16 }
  17 dd -if $1 -count 1 >[2]/dev/null | \
  18 awk '
  19 /^kfs/{fs["kfs"]++}
  20 /^(blocksize|daddrbits|daddrbits|indirblks|dirblks|namelen)/{p[$1]=$2}
  21 END{
  22         ca["fs", "blocksize"] = 4*1024
  23         ca["fs", "namelen"] = 28
  24         ca["fs", "dirblks"] = 6
  25         ca["fs", "indirblks"] = 2
  26         ca["fs", "daddrbits"] = 32
  27
  28         ca["fs64", "blocksize"] = 8*1024
  29         ca["fs64", "namelen"] = 56
  30         ca["fs64", "dirblks"] = 6
  31         ca["fs64", "indirblks"] = 4
  32         ca["fs64", "daddrbits"] = 64
  33
  34         ca["cwfs", "blocksize"] = 16*1024
  35         ca["cwfs", "namelen"] = 28
  36         ca["cwfs", "dirblks"] = 6
  37         ca["cwfs", "indirblks"] = 2
  38         ca["cwfs", "daddrbits"] = 32
  39
  40         ca["cwfs64", "blocksize"] = 16*1024
  41         ca["cwfs64", "namelen"] = 56
  42         ca["cwfs64", "dirblks"] = 6
  43         ca["cwfs64", "indirblks"] = 4
  44         ca["cwfs64", "daddrbits"] = 64
  45
  46         ca["cwfs64x", "blocksize"] = 16*1024
  47         ca["cwfs64x", "namelen"] = 144
  48         ca["cwfs64x", "dirblks"] = 6
  49         ca["cwfs64x", "indirblks"] = 4
  50         ca["cwfs64x", "daddrbits"] = 64
  51
  52         for(e in ca){
  53                 split(e, k, SUBSEP)
  54                 if(ca[k[1],k[2]] == p[k[2]])
  55                         fs[k[1]]++
  56         }
  57         for(i in fs)
  58                 if(fs[i] > fs[j])
  59                         j=i
  60         if(fs[j]){
  61                 print j
  62                 exit
  63         }
  64         exit 1
  65 }
  66 '