此脚本是将指定输入格式转换为8字节对齐的文本，供大家参考学习shell
#!/bin/bash
#Extract text in a fixed format, Mainly for input board output
rm -rf $2 #remove file
left="{"
count=1
is_count=0
while read line #read file
do
length=${line:12:6} #get substring
if [ "$length" == "length" ]
then
is_count=1
fi
if [ $is_count == 1 ]
then
let count++
if [ $count == 4 ]
then
count=1
is_count=0
fi
continue
fi
head=${line:24:1}
del_spa=
if [ "$head" == "$left" ]
then
del_spa=$(echo ${line:25:12}${line:40:12}${line:53} | tr -d '[ \t]')
echo ${del_spa:0:16} >> $2
echo ${del_spa:16} >> $2
else
del_spa=$(echo ${line:24} | tr -d '[ \t]')
echo ${del_spa:0:16} >> $2
echo ${del_spa:16} >> $2
fi
done < $1
