AWK其哈希值替换列 [英] Awk replace a column with its hash value

问题描述

我怎么能与它的散列值（如MD5）在AWK或sed的？

How can I replace a column with its hash value (like MD5) in awk or sed?

原始文件是超级巨大的，所以我需要这是真正有效。

The original file is super huge, so I need this to be really efficient.

推荐答案

我复制粘贴larsks的反应，但我已经添加了近线，以避免在这个岗位指出的问题：<一href=\"http://stackoverflow.com/questions/2391272/gawk-awk-piping-date-to-getline-sometimes-wont-work\">gawk / AWK：管道日期函数getline * *有时会无法正常工作

I copy pasted larsks's response, but I have added the close line, to avoid the problem indicated in this post: gawk / awk: piping date to getline *sometimes* won't work

awk '{
    tmp="echo " $2 " | openssl md5 | cut -f2 -d\" \""
tmp | getline cksum
close(tmp)
$2=cksum
print
}' < sample 

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