正则的问题。如何匹配一个单词

addbe

测试文件内容

1. 
   
2. This file tests for book in various places, such as
   
3. book at the beginning of a line or
   
4. at the end of a line book
   
5. as well as the plural books and
   
6. handbooks.  Here are some
   
7. phrases that use the word in different ways:
   
8. "book of the year award"
   
9. to look for a line with the word "book"
   
10. A GREAT book!
    
11. A great book? No.
    
12. told them about (the books) until it
    
13. Here are the books that you requested
    
14. Yes, it is a good book for children
    
15. amazing that it was called a "harmful book" when
    
16. once you get to the end of the book, you can't believe
    
17. A well-written regular expression should
    
18. avoid matching unrelated words,
    
19. such as booky (is that a word?)
    
20. and bookish and
    
21. bookworm and so on.
    

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运行及结果

1. $ egrep "(^| )[\"[{(]*book[]})\"?\!.,;:'s]*( |$)" bookwords
   
2. This file tests for book in various places, such as
   
3. book at the beginning of a line or
   
4. as well as the plural books and
   
5. "book of the year award"
   
6. A great book? No.
   
7. told them about (the books) until it
   
8. Here are the books that you requested
   
9. Yes, it is a good book for children
   
10. amazing that it was called a "harmful book" when
    
11. once you get to the end of the book, you can't believe

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目的，匹配book这个关键词，包含复数形式（books）
sed&awk 第二版显示，如上正则匹配及结果如下

1. $ egrep "(^| )[\"[{(]*book[]})\"?\!.,;:'s]*( |$)" bookwords
   
2. This file tests for book in various places, such as
   
3. book at the beginning of a line or
   
4. at the end of a line book
   
5. as well as the plural books and
   
6. "book of the year award"
   
7. to look for a line with the word "book"
   
8. A GREAT book!
   
9. A great book? No.
   
10. told them about (the books) until it
    
11. Here are the books that you requested
    
12. Yes, it is a good book for children
    
13. amazing that it was called a "harmful book" when
    
14. once you get to the end of the book, you can't believe
    

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不知为啥

A GREAT book!

就是无法匹配到。

谢谢指教

addbe

$ egrep --version
GNU grep 2.5.3

Copyright (C) 1988, 1992-2002, 2004, 2005  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

blackold

没有问题啊。

kwokcn

我这儿也OK……
邪门儿了，刚才那帖也是我这儿没问题，他那儿出错……

addbe

$ egrep --version
egrep (GNU grep) 2.5.1

Copyright 1988, 1992-1999, 2000, 2001 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

貌似成功了
传说中的RPWT？
之前是在cygwin中测试
现在跑了个虚拟机