子进程中的嵌套while循环

Question

我的 bash 脚本有一个问题，即中断一个嵌套的 while 循环，该循环从带有尾部的日志文件中读取一行。

我需要什么：读取日志文件的嵌套 while 循环应该找到一些正则表达式。如果这是真的，将其保存到一个变量中并打破循环。在循环之外还有另一个 while 循环，用于检查是否该将一些数据发送到 Confluence 页面。如果不是时候什么都不做，直到在 while 循环中找到符合正则表达式的行。

我做了一个 MVCE：

#!/bin/bash    

counterSearch=0    

tail -n0 -f $logfile | {
    while true; do
        currentMinute=$(date +%S)    

        # Checks if $currentSecond is set to 59. If true do something.
        # Else go back to while loop.
        if [[ $currentSecond -eq 59 ]]; then
           echo "Hello. This is 59 seconds outside while read line loop"
        fi

        # This while loop should always check if in the $logfile a specific line if found.
        # If true save it and go back to the outside while loop. When a new line is found
        # execute it again.
        while read line ; do
            if echo "$line" | grep -e "/rest/api/2/search.*PASSED" 1>/dev/null 2>&1 ; then
               echo "$date - Search and passed API action" >> $log
               counterSearch=$((counterSearch+1))
            fi
        done
    done
}    

问题在于内部的 while 循环一直在运行。如果没有突破到外部 while 循环。我已经尝试过使用函数和带有 if/else 调用一个或另一个循环的函数。

Answer 1

while循环在子shell中执行

试试这个代码：

#!/bin/bash    

export counterSearch=0    

tail -n0 -f $logfile | {
    while true; do
        currentMinute=$(date +%M)  
        currentSecond=$(date +%S)   

        # Checks if $currentSecond is set to 59. If true do something.
        # Else go back to while loop.
        if [[ $currentSecond -eq 59 ]]; then
           echo "Hello. This is 59 seconds outside while read line loop"
        fi

        # This while loop should always check if in the $logfile a specific line if found.
        # If true save it and go back to the outside while loop. When a new line is found
        # execute it again.
        while read line ; do
            if echo "$line" | grep -e "/rest/api/2/search.*PASSED" 1>/dev/null 2>&1 ; then
               echo "$date - Search and passed API action" >> $log
               export counterSearch=$((counterSearch+1))
            fi
        done
    done
}