如果是简单文件内容（没有引号或分号）：

for f in "$outputfolder"/*.csv; do
    IFS=\; read -a cols <<<$(head -n 1 -- "$f")
    while IFS=\; read ${cols[@]}; do
        # do something here
        declare -p ${cols[@]}
        echo
    done < <(tail -n +2 -- "$f" | sort -t\; -k1,1 -s)
done

将-s传递给支持它的排序，并且只对第一个字段进行排序，应该会保留大部分初始行顺序。
我假设头文件名和bash变量名一样法律的。
使用示例数据，将输出：

declare -- Category="A"
declare -- Name="Bos"
declare -- email="user1@mail.com"
declare -- Functions="Driver"
declare -- Owner_ID="123"
declare -- Backup_ID="321"

declare -- Category="A"
declare -- Name="Bos"
declare -- email="user1@mail.com"
declare -- Functions="Driver"
declare -- Owner_ID="123"
declare -- Backup_ID="321"

declare -- Category="A"
declare -- Name="Bos"
declare -- email="user1@mail.com"
declare -- Functions="Driver"
declare -- Owner_ID="123"
declare -- Backup_ID="321"

declare -- Category="B"
declare -- Name="Nos"
declare -- email="user2@mail.com"
declare -- Functions="Builder"
declare -- Owner_ID="456"
declare -- Backup_ID="654"

declare -- Category="C"
declare -- Name="Kos"
declare -- email="user2@mail.com"
declare -- Functions="Engineer"
declare -- Owner_ID="789"
declare -- Backup_ID="987"

declare -- Category="C"
declare -- Name="Kos"
declare -- email="user2@mail.com"
declare -- Functions="Engineer"
declare -- Owner_ID="789"
declare -- Backup_ID="987"

declare -- Category="D"
declare -- Name="Los"
declare -- email="user3@mail.com"
declare -- Functions="Architect"
declare -- Owner_ID="100"
declare -- Backup_ID="1"

我写了一些代码来分割标题行和数据行。但是由于变量名是未知的，它们必须保存在数组中。
下面是代码：

#!/bin/bash

file="input.csv"
if [[ ! -f "$file" ]]
then
    echo "ERROR: $file does not exist."
    exit 1
fi

# Build an array of the desired variables
firstline=$(head -1 "$file")
IFS=';' firstlinearray=($firstline)
numberofheaders=${#firstlinearray[@]}

# DEBUG
echo "----- HEADERS -----" >&2
echo "number of headers: $numberofheaders" >&2
for header in "${firstlinearray[@]}"
do
    echo "1 $header" >&2
done

while IFS= read -r line
do
    IFS=';' linearray=($line)

    # DEBUG
    echo "----------" >&2
    for item in "${linearray[@]}"
    do
        echo "$item" >&2
    done

    # Assign variables
    echo "----------"
    for (( i=0; i<numberofheaders; i++ ))
    do
        echo "${firstlinearray[$i]} == ${linearray[$i]}"

        # Put your code here to use the variables: ${firstlinearray[$i]}
        # and the values: ${linearray[$i]}

    done

done < <(tail -n +2 "$file" | sort)

• 要正常运行，请将其保存到文件并执行以下操作：$ script.bash 2>/dev/null
• 如果需要调试日志，请执行以下操作：$ script.bash

其输出为：

----------
Category == A
Name == Bos
email == user1@mail.com
Functions == Driver
Owner_ID == 123
Backup_ID == 321
----------
Category == A
Name == Bos
email == user1@mail.com
Functions == Driver
Owner_ID == 123
Backup_ID == 321
----------
Category == A
Name == Bos
email == user1@mail.com
Functions == Driver
Owner_ID == 123
Backup_ID == 321
----------
Category == B
Name == Nos
email == user2@mail.com
Functions == Builder
Owner_ID == 456
Backup_ID == 654
----------
Category == C
Name == Kos
email == user2@mail.com
Functions == Engineer
Owner_ID == 789
Backup_ID == 987
----------
Category == C
Name == Kos
email == user2@mail.com
Functions == Engineer
Owner_ID == 789
Backup_ID == 987
----------
Category == D
Name == Los
email == user3@mail.com
Functions == Architect
Owner_ID == 100
Backup_ID == 1

编辑5月28日

如果您希望只处理唯一的行，从而消除重复的行，请将上面代码的最后一行替换为这一行，这一行添加了uniq命令。

done < <(tail -n +2 "$file" | sort | uniq)