linux版本号比较脚本

#!/bin/bash

# 函数：将版本号转换为数字
version_to_number() {
    local version=$1
    local sum=0
    local weight=1
    for i in $(echo $version | tr '.' ' '); do
        sum=$((sum + weight * i))
        weight=$((weight * 100))
    done
    echo $sum
}

# 检查参数数量
if [ $# -ne 2 ]; then
    echo "Usage: $0 <version1> <version2>"
    exit 1
fi

version1=$1
version2=$2

num1=$(version_to_number $version1)
num2=$(version_to_number $version2)

if [ $num1 -gt $num2 ]; then
    echo "$version1 is newer than $version2"
elif [ $num1 -lt $num2 ]; then
    echo "$version1 is older than $version2"
else
    echo "$version1 is equal to $version2"
fi

if ! [[ $version =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
    echo "Invalid version format: $version"
    exit 1
fi

version_to_number() {
    local version=$1
    local sum=0
    local weight=1
    for i in $(echo $version | tr -cd '[:digit:]'); do
        sum=$((sum + weight * i))
        weight=$((weight * 100))
    done
    for i in $(echo $version | tr -d '[:digit:]'); do
        case $i in
            a|b|c) sum=$((sum + 10));;
            d|e|f) sum=$((sum + 20));;
            *) echo "Unsupported character: $i"; exit 1;;
        esac
    done
    echo $sum
}