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电子邮件 Bash 脚本

tag-icon • tag-icon bash shell-script centos email
电子邮件 Bash 脚本

我的脚本有问题

它是一个通知程序，会在特定时间向我发送电子邮件，然后在文件超过 100kb 时包含一条声明

这是我的脚本，我如何配置它以便它向我发送通知？

#!/bin/bash

file="afile"
maxsize=100

while true; do

        actualsize=$(du -k "$file" | cut -f1)

        if [ $actualsize -ge $maxsize ]
        then
                echo size is over $maxsize kilobytes
                subject="size exceed on file $file"
                emailAddr="[email protected]"
                emailCmd="mail -s \"$exceedfile\" \"$emvpacifico\""
        (echo ""; echo "date: $(date)";) | eval mail -s "$exceedfile" \"[email protected]\"
                exit
        else
                echo size is under $maxsize kilobytes
        fi

        sleep 60
done

答案1

快速重写，内嵌注释：

#!/bin/bash

file="afile"
maxsize=100

while true; do
   # Use `stat`, the tool for getting file metadata, rather than `du`
   # and chewing on its output.  It gives size in bytes, so divide by
   # 1024 for kilobytes.
   actualsize=$(($(stat --printf="%s" "$file")/1024))
      if [[ $actualsize -ge $maxsize ]]; then
         echo "size is over $maxsize kilobytes"
         subject="size exceed on file $file"
         emailAddr="[email protected]"
         # In almost all cases, if you are using `eval`, either
         # something has gone very wrong, or you are doing a thing in
         # a _very_ suboptimal way.
         echo "Date: $(date)" | mail -s "$subject" "$emailAddr"
      else
         echo "size is under $maxsize kilobytes"
      fi
   sleep 60
done

另外，我建议不要运行无限循环的脚本，而是将脚本更改为仅运行一次，并安排它使用cron表条目运行。

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