Oneliner来计算maillog中的所有消息完全大小 [英] Oneliner to calculate complete size of all messages in maillog

问题描述

玉家伙我在一个死胡同我真的在这里，不知道什么尝试...

Ok guys I'm really at a dead end here, don't know what else to try...

我写了一些电子邮件的统计数据的脚本，它需要做的事情之一是计算出的maillog的所有消息的完整大小，这是我写的，到目前为止：

I am writing a script for some e-mail statistics, one of the things it needs to do is calculate the complete size of all messages in the maillog, this is what I wrote so far:

egrep ' HOSTNAME sendmail\[.*.from=.*., size=' maillog | awk '{print $8}' |  
tr "," "+" | tr -cd '[:digit:][=+=]' | sed 's/^/(/;s/+$/)\/1048576/' |  
bc -ql | awk -F "." '{print $1}'

这是从我的maillog一个样本行：

And here is a sample line from my maillog:

Nov 15 09:08:48 HOSTNAME sendmail[3226]: oAF88gWb003226:  
from=<[e-mail]>, size=40992, class=0, nrcpts=24,  
msgid=<[e-mail]>, proto=ESMTP,  
daemon=MTA1, relay=[1.1.1.1]

所以我会尽力解释它一步一步：

So I'll try to explain it step by step:

首先，我通过文件grep来查找包含实际的大小的所有的行，下一个I打印第八场，在这种情况下，大小= 40992，

First I grep through the file to find all the lines containing the actual "size", next i print the 8th field, in this case "size=40992,".

接下来我全部更换一个加号逗号字符。

Next I replace all the comma characters with a plus sign.

然后我删除除位数一切的加号。

Then I delete everything except the digits and the plus sign.

然后我更换行的开头用（和我替换最后额外加上一个标志）后面加上/ 1048576。所以我得到了巨大的前pression看起来像这样：

Then I replace the beginning of the line with a "(", and I replace the last extra plus sign with a ")" followed by "/1048576". So i get a huge expression looking like this:

（1 + 2 + 3 + 4 + 5 ... + n）个/ 1048576

"(1+2+3+4+5...+n)/1048576"

由于我要添加的所有个人信息的大小和分裂，所以我得到的结果以MB为单位。

Because I want to add up all the individual message sizes and divide it so I get the result in MB.

最后一个awk命令是，当我得到一个十进制数，我真的不关心precision所以我只是小数点前打印的部分。

The last awk command is when I get a decimal number I really don't care for precision so i just print the part before the decimal point.

问题是，这并不工作...我可以发誓，它是在一个点的工作，难道是我的前pression太长BC处理？

The problem is, this doesn't work... And I could swear it was working at one point, could it be my expression is too long for bc to handle?

感谢，如果你花时间来通读：）

Thanks if you took the time to read through :)

推荐答案

我觉得一个行 AWK 脚本也可以工作。它匹配您的egrep模式匹配，那么这些行它通过等号（=）分割第八记录，并增加了第二部分（数）的总和变量的任何行。当它看到文件的末尾它打印出的SUM / 1048576值（或Mibibytes的字节数）。

I think a one-line awk script will work too. It matches any line that your egrep pattern matches, then for those lines it splits the eighth record by the = sign and adds the second part (the number) to the SUM variable. When it sees the END of the file it prints out the value of SUM/1048576 (or the byte count in Mibibytes).

awk '/ HOSTNAME sendmail\[.*.from=.*., size=/{ split($8,a,"=") ; SUM += a[2] } END { print SUM/1048576 }' maillog

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