Bash - 使用来自文件的输入从 while 循环中按顺序运行多个命令

Question

尝试使用单个 while 循环从用户收集变量并运行连续的“at”命令。单数 at 命令有效，尝试合并失败而没有错误。在这种特殊情况下，输出显示作业已创建，但第一个操作从未完成。

#!/bin/bash
PATH=$PATH:/usr/openv/netbackup/bin:/usr/openv/netbackup/bin/admincmd:/usr/openv/volmgr/bin
read -p "Enter the time and date to deactivate the policies (format - 24hr Month Date example 0400 May 09) : " offtime
read -p "Enter the time and date to reactivate the policies (format - 24hr Month Date example 0400 May 09) : " ontime
while read -r i;
        do
                bpplinfo $i -modify -inactive | at $offtime;
                bpplinfo $i -modify -active | at $ontime
done < /tmp/policies.txt

Answer 1

将字符串发送到 at 的 echo 命令，效果很好。

#!/bin/bash
PATH=$PATH:/usr/openv/netbackup/bin:/usr/openv/netbackup/bin/admincmd:/usr/openv/volmgr/bin
read -p "Enter the time and date to deactivate the policies (format - 24hr Month Date example 0400 May 09) : " offtime
read -p "Enter the time and date to reactivate the policies (format - 24hr Month Date example 0400 May 09) : " ontime
while read -r i;
do
    echo "bpplinfo $i -modify -inactive" | at $offtime;
    echo "bpplinfo $i -modify -active" | at $ontime
done < /tmp/policies.txt