问一个shell的写法

闸北陆小洪

输入是这样：

time:0,rate:0.000000,ip:112.4.2.48,id:35716461,SDK:5.0.1

顺序不一定是这样哦，time:0可能在任意的位置

想要的输出是：

time:0,id:3571646

求助一下。。

__lxmxn__

1. grep -oP '(time|id):\d+' a | sed 'N;s/\n/,/'

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闸北陆小洪

回复 2# __lxmxn__


    可以了  谢谢楼上

   再问下  sed是不是不支持非贪婪匹配阿  我用sed就是不行

L_kernel

闸北陆小洪 发表于 2012-05-25 13:42
回复 2# __lxmxn__

确实不支持。不过可以用[^x]之类的过滤掉。

闸北陆小洪

回复 4# L_kernel


    ok  明白了  谢谢各位

ulovko

__lxmxn__ 发表于 2012-05-25 13:30

1. grep -oP '(time|id):\d+'| sed 'N;s/\n/,/'

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\t a tab character
\n a newline character
\r a carriage-r eturn character
\s matches any ™whitespaceš character (space, tab, newline, formfeed, and such)
\S anything not !\s"
\w ![a-zA-Z0-9R]" (useful as in !\w+", ostensibly to match a word)
\W anything not !\w", i.e., ![^a-zA-Z0-9R]"
\d ![0-9]", i.e., a digit
\D anything not !\d", i.e., ![^0-9]"

The "n" command will print out the current pattern space (unless the "-n" flag is used), empty the current pattern space, and read in the next line of input. The "N" command does not print out the current pattern space and does not empty the pattern space. It reads in the next line, but appends a new line character along with the input line itself to the pattern space.

The "d" command deleted the current pattern space, reads in the next line, puts the new line into the pattern space, and aborts the current command, and starts execution at the first sed command. This is called starting a new "cycle." The "D" command deletes the first portion of the pattern space, up to the new line character, leaving the rest of the pattern alone. Like "d," it stops the current command and starts the command cycle over again. However, it will not print the current pattern space. You must print it yourself, a step earlier. If the "D" command is executed with a group of other commands in a curly brace, commands after the "D" command are ignored. The next group of sed commands is executed, unless the pattern space is emptied. If this happens, the cycle is started from the top and a new line is read.

The "p" command prints the entire pattern space. The "P" command only prints the first part of the pattern space, up to the NEWLINE character. Neither the "p" nor the "P" command changes the patterns space.

rdcwayx

by awk

1. awk -F , '{for (i=1;i<=NF;i++) if ($i~/time:/||$i~/id:/) printf $i FS}' infile

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ulovko

rdcwayx 发表于 2012-05-25 14:23
by awk

这个好，我喜欢awk

闸北陆小洪

回复 7# rdcwayx


    thx  awk也不错