十六进制在bash二进制转换(Hex to Binary conversion in bash)

2019-07-30 01:12发布

我试图从十六进制使用bash一系列字节转换成仓。 但我不断收到(看似随机)“(standard_in)1:语法错误”从下面的代码回复:

for j in c4 97 91 8c 85 87 c4 90 8c 8d 9a 83 81
do
        BIN=$(echo "obase=2; ibase=16; $j" | bc )
        echo $BIN
done

我做了类似的事情,与十二月至仓,其工作完全正常:

for i in {0..120}
do
        KEYBIN=$(echo "obase=2; ibase=10; $i" | bc)
        echo $KEYBIN
done

有没有人有一个想法,为什么它有小数点的作品,但不能与十六进制? 在我看来,语法是几乎相同的(除非我失去了一些东西真的很难。)

Answer 1:

BC是案例十六进制值有点敏感,更改为大写,它应该工作

for j in C4 97 91 8C 85 87 C4 90 8C 8D 9A 83 81
do
        BIN=$(echo "obase=2; ibase=16; $j" | bc )
        echo $BIN
done

输出:

11000100
10010111
10010001
10001100
10000101
10000111
11000100
10010000
10001100
10001101
10011010
10000011
10000001


Answer 2:

下面是我使用的脚本:

#!/bin/bash
# SCRIPT:  hex2binary.sh
# USAGE:   hex2binary.sh Hex_Number(s)
# PURPOSE: Hex to Binary Conversion. Takes input as command line
#          arguments.
#####################################################################
#                      Script Starts Here                           #
#####################################################################

if [ $# -eq 0 ]
then
    echo "Argument(s) not supplied "
    echo "Usage: hex2binary.sh hex_number(s)"
else
    echo -e "\033[1mHEX                 \t\t BINARY\033[0m"

    while [ $# -ne 0 ]
    do
        DecNum=`printf "%d" $1`
        Binary=
        Number=$DecNum

        while [ $DecNum -ne 0 ]
        do
            Bit=$(expr $DecNum % 2)
            Binary=$Bit$Binary
            DecNum=$(expr $DecNum / 2)
        done

        echo -e "$Number              \t\t $Binary"
        shift
        # Shifts command line arguments one step.Now $1 holds second argument
        unset Binary
    done

fi


文章来源: Hex to Binary conversion in bash
标签: bash binary hex bc