脚本是:

#!/bin/bash

# Dynamic Menu Function
createmenu () {
    select selected_option; do # in "$@" is the default
        if [ 1 -le "$REPLY" ] && [ "$REPLY" -le $(($#)) ]; then
            break;
        else
            echo "Please make a vaild selection (1-$#)."
        fi
    done
}

declare -a drives=();
# Load Menu by Line of Returned Command
mapfile -t drives < <(lsblk --nodeps -o name,serial,size | grep "sd");
# Display Menu and Prompt for Input
echo "Available Drives (Please select one):";
createmenu "${drives[@]}"
# Split Selected Option into Array and Display
drive=($(echo "${selected_option}"));
echo "Drive Id: ${drive[0]}";
echo "Serial Number: ${drive[1]}";

较早的系统没有mapfilereadarray,因此我需要将该行转换为可以将lsblk输出的每一行读入数组的某种替代方式。

有问题的创建数组的行是:
mapfile -t drives < <(lsblk --nodeps -o name,serial,size | grep "sd");

最佳答案

您可以遍历输入并追加到数组:

$ while IFS= read -r line; do arr+=("$line"); done < <(printf '%d\n' {0..5})
$ declare -p arr
declare -a arr='([0]="0" [1]="1" [2]="2" [3]="3" [4]="4" [5]="5")'

或者,对于您的特定情况:
while IFS= read -r line; do
    drives+=("$line")
done < <(lsblk --nodeps -o name,serial,size | grep "sd")

有关IFS= read -r是个好主意的详细说明,请参见BashFAQ/001:它可确保保留空格且不解释反斜杠序列。

关于bash - 需要较早版本的Bash上的readarray/mapfile替代脚本,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/41475261/

10-16 03:47