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停止 shell 脚本中的处理但不退出

tag-icon • tag-icon shell shell-script
停止 shell 脚本中的处理但不退出

我有一个不断运行的脚本来监视 vsftpd 日志。这是一个小例子：

#!/bin/sh
tail -n0 -F /var/log/vsftpd.log | while read line; do
    if echo "$line" | grep -q 'OK UPLOAD:'; then
        username=$(echo "$line" | cut -d" " -f9 | sed 's/\[\(.*\)\]/\1/')
        if [ $? -ne 0 ]; then
            echo "ERROR: Failure to get parse username. Line it is trying to parse: $line" >>/var/log/ftpmonitor.log
            # We need to remove the file with any error so it doesn't linger
            rm -rf $home$filenamewithpath
            if [ $? -ne 0 ]; then
                echo "ERROR: Failed to delete video file" >>/var/log/ftpmonitor.log
                exit 1
            fi
            exit 1
        fi
     # lot of other stuff here...
     fi
done

我想捕获任何命令失败的错误并停止。原本我以为我会使用 exit 来停止。通常这是有道理的，但在这种情况下，该脚本需要一直运行以监视 vsftpd 日志。所以我不想退出脚本，我只想在失败后停止任何其他命令。我怎样才能实现这个目标？

答案1

我假设你的意思是你想跳到下一行/var/log/vsftpd.log？
如果是这样，只需使用continue.

#!/bin/sh
tail -n0 -F /var/log/vsftpd.log | while read line; do
    if echo "$line" | grep -q 'OK UPLOAD:'; then
        username=$(echo "$line" | cut -d" " -f9 | sed 's/\[\(.*\)\]/\1/')
        if [ $? -ne 0 ]; then
            echo "ERROR: Failure to get parse username. Line it is trying to parse: $line" >>/var/log/ftpmonitor.log
            # We need to remove the file with any error so it doesn't linger
            rm -rf $home$filenamewithpath
            if [ $? -ne 0 ]; then
                echo "ERROR: Failed to delete video file" >>/var/log/ftpmonitor.log
                continue
            fi
            continue
        fi
     # lot of other stuff here...
     fi
done

continue只是跳到封闭循环的下一次迭代。

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