sed 将括号放在开头并在第 4 行结束 [英] sed place parentheses at the beginning and close on the 4th line

问题描述

我试图在第一行放置一个左括号并将其关闭作为第四行的结尾.下面是我要查找的数据后跟输出的示例.

Im trying to place a open parenthesis on the first line and close it as the end of the 4th line. Below is a example of the data followed by the output that I am looking for.

tester1
SERVICE_TICKET_CREATED
Thu Mar 19 23:27:57 UTC 2015
192.168.1.3
tester2
SERVICE_TICKET_CREATED
Fri Mar 20 00:31:59 UTC 2015
192.168.1.2

(tester1
SERVICE_TICKET_CREATED
Thu Mar 19 23:27:57 UTC 2015
192.168.1.3)
(tester2
SERVICE_TICKET_CREATED
Fri Mar 20 00:31:59 UTC 2015
192.168.1.2)

推荐答案

使用 awk 你可以这样做

awk 'NR%4==1{print "("$0; next} NR%4==0{print $0")"; next}1'

测试

$ awk 'NR%4==1{print "("$0; next} NR%4==0{print $0")"; next}1' input
(tester1
SERVICE_TICKET_CREATED
Thu Mar 19 23:27:57 UTC 2015
192.168.1.3)
(tester2
SERVICE_TICKET_CREATED
Fri Mar 20 00:31:59 UTC 2015
192.168.1.2)

较短的版本

awk 'NR%4==1{$0="("$0} NR%4==0{$0=$0")"}1'

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