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如何使用 for 循环创建函数？

tag-icon • tag-icon bash shell-script shell scripting function
如何使用 for 循环创建函数？

我正在尝试使用 for 循环来创建在 Arch 安装脚本中选择密码的函数（基于易拱门）使用以下代码（其中使用这重复提示的答案以及这一个用于添加换行符来读取）：

#!/bin/bash
errEcho() { echo -e "${BOLD}${BRED}[ ${BBLUE}•${BRED} ] $1${RESET}"; }
for type in encrypt user root; do
    pick_${type}pass() {
            read -rsp "Enter $type password: " ${type}pass
            read -rsp $'\nVerify password: ' ${type}pass2
            echo
            if [ "$typepass" != "$typepass2" ]; then
                errEcho "Passwords don't match."
                return 1
            fi
            return 0
    }
done
until pick_userpass; do : ; done

运行时，我收到以下错误（最后一行被垃圾邮件发送，直到脚本终止）：

./looptest.sh: line 3: `pick_${type}pass': not a valid identifier
./looptest.sh: line 3: `pick_${type}pass': not a valid identifier
./looptest.sh: line 3: `pick_${type}pass': not a valid identifier
./looptest.sh: line 15: pick_userpass: command not found

有谁知道如何解决这个问题？

答案1

简短的回答：不。使用一个函数并向其传递参数。使用关联数组：

pick_pass() {
    local type=$1
    local pass pass2
    while true; do
        read -rsp "Enter $type password: " pass
        read -rsp $'\nVerify password: ' pass2
        echo
        [[ "$pass" == "$pass2" ]] && break
        errEcho "Passwords don't match."
    done
    password[$type]=$pass
}

declare -A password

for type in encrypt user root; do
    pick_pass $type
done

declare -p password

不是特别说明，但运行它：

declare -p password
Enter encrypt password:
Verify password:
Enter user password:
Verify password:
Enter root password:
Verify password:
bash: errEcho: command not found
Enter root password:
Verify password:
declare -A password=([encrypt]="foo" [root]="asdf" [user]="bar" )

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