UNIX for Advanced & Expert Users

#!/bin/bash --posix
# bash-hexdump

# Open the file $1 to be read with an fd 3.
exec 3<"$1"

saveIFS="$IFS"
IFS=""
char="00"
val="FF"
position=0

while read -s -u 3 -d '' -r -n 1 char
do
    # """If the leading character is a single-quote or double-quote,
    # the value shall be the numeric value in the underlying codeset
    # of the character following the single-quote or double-quote."""
    printf -v val "%02X" "'$char"
    if [ ${#val} -gt 2 ]
    then
        position=$[ ( ${#val} - 2 ) ]
        val="${val:$position:2}"
    fi
    echo -n " $val "
done

echo ""

IFS="$saveIFS"

# Finally ensure fd 3 is closed.
exec 3<&-

Last login: Mon Oct 14 11:27:22 on ttys000
AMIGA:barrywalker~> ./bin_import.sh BinaryFile.dat
 00  01  02  03  04  05  06  07  08  09  0A  0B  0C  0D  0E  0F  10  11  12  13  14  15  16 
 17  18  19  1A  1B  1C  1D  1E  1F  20  21  22  23  24  25  26  27  28  29  2A  2B  2C  2D 
 2E  2F  30  31  32  33  34  35  36  37  38  39  3A  3B  3C  3D  3E  3F  40  41  42  43  44 
 45  46  47  48  49  4A  4B  4C  4D  4E  4F  50  51  52  53  54  55  56  57  58  59  5A  5B 
 5C  5D  5E  5F  60  61  62  63  64  65  66  67  68  69  6A  6B  6C  6D  6E  6F  70  71  72 
 73  74  75  76  77  78  79  7A  7B  7C  7D  7E  7F  80  81  82  83  84  85  86  87  88  89 
 8A  8B  8C  8D  8E  8F  90  91  92  93  94  95  96  97  98  99  9A  9B  9C  9D  9E  9F  A0 
 A1  A2  A3  A4  A5  A6  A7  A8  A9  AA  AB  AC  AD  AE  AF  B0  B1  B2  B3  B4  B5  B6  B7 
 B8  B9  BA  BB  BC  BD  BE  BF  C0  C1  C2  C3  C4  C5  C6  C7  C8  C9  CA  CB  CC  CD  CE 
 CF  D0  D1  D2  D3  D4  D5  D6  D7  D8  D9  DA  DB  DC  DD  DE  DF  E0  E1  E2  E3  E4  E5 
 E6  E7  E8  E9  EA  EB  EC  ED  EE  EF  F0  F1  F2  F3  F4  F5  F6  F7  F8  F9  FA  FB  FC 
 FD  FE  FF 
AMIGA:barrywalker~>