我如何获得"awk"修改文件的某些行，而不是整个文件? [英] How do I get "awk" to modify only certain lines of a file, instead of the whole file?

问题描述

我想重用

I would like to reuse this awk code, to properly capitalice some cue sheet audio files. This code not only capitalice all the words, but follows some capitalization rules, as explained in the linked question.

问题在于如何修改此代码以仅大写"而不是整个文件.例如，使用以下简单的提示表:

The problem is how to modify this code to capitalize only the "TITLE" lines, and not the whole file. For example, with this simple cue sheet:

FILE "Two The Beatles Songs.wav" WAVE
  TRACK 01 AUDIO
    TITLE "dig A pony"
    PERFORMER "The Beatles"
    INDEX 01 00:00:00
  TRACK 02 AUDIO
    TITLE "from me to you"
    PERFORMER "The Beatles"
    INDEX 01 03:58:02

并带有一个简单的for循环和awk代码，例如:

And with a simple for loop plus the awk code, for example something like this:

#!/bin/sh
for cue_file in *.cue
do
  awk 'BEGIN{split("a the to at in on with and but or",w); for(i in w)nocap[w[i]]}function cap(word){return toupper(substr(word,1,1)) tolower(substr(word,2))}{for(i=1;i<=NF;++i){printf "%s%s",(i==1||i==NF||!(tolower($i) in nocap)?cap($i):tolower($i)),(i==NF?"\n":" ")}}' "$cue_file" > ~/temp_cue_file && mv ~/temp_cue_file "$cue_file"
done

运行脚本后的结果必须是:

The result after running the script must be:

FILE "Two The Beatles Songs.wav" WAVE
  TRACK 01 AUDIO
    TITLE "Dig a Pony"
    PERFORMER "The Beatles"
    INDEX 01 00:00:00
  TRACK 02 AUDIO
    TITLE "From Me to You"
    PERFORMER "The Beatles"
    INDEX 01 03:58:02

也就是说，用 TITLE挖小马" 代替 TITLE挖小马" .和 TITLE从我到你" 而不是 TITLE从我到你" .

That is, TITLE "Dig a Pony" instead of TITLE "dig A pony". And TITLE "From Me to You" instead of TITLE "from me to you".

请求是:

1. 如前所述，shell脚本必须