对所有程序文件的字符都转换为小写的脚本，有一个问题，请大家帮忙。

灿烂小猪

脚本如下：

1. #!/bin.bash
   
2. 
   
3. find /cygdrive/d/max/ -type f -name *.html > list.txt
   
4. 
   
5. for i in $(cat list.txt)
   
6. do
   
7. cat "$i" | tr '[A-Z]' '[a-z]' > "$i"
   
8. echo $i
   
9. done
   

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list.txt如下:

1. /cygdrive/d/max/basicDo.html
   
2. /cygdrive/d/max/bdzx/app/expepf_return.html
   
3. /cygdrive/d/max/bdzx/applyep - 副本.html
   

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脚本执行到/cygdrive/d/max/bdzx/applyep - 副本.cfm这个文件就过不去了。原因是有空格，for又分出来了-和副本.html。请问大家，在for中怎样把/cygdrive/d/max/bdzx/applyep - 副本.html这一行变成一个变量呢？另外，转换所有程序文件大小写有没有其他办法？不吝赐教，谢谢了。

rdcwayx

1. find /cygdrive/d/max/ -type f -name *.html > list.txt
   
2. 
   
3. while read i
   
4. do
   
5. cat "${i}" | tr '[A-Z]' '[a-z]' > "${i}"
   
6. echo ${i}
   
7. done < list.txt

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灿烂小猪

哇，谢谢了。我试试

dn833

1. echo "ABcdEF"|sed 's/[A-Z]/\l&/g'

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灿烂小猪

你好的，你的sed我没看明白，请指导一下吧。

回复 4# dn833


   

lbseraph

sed的那是正则了~不过挺好用

灿烂小猪

回复 6# lbseraph


是的，sed s/[A-Z]/匹配大写字母\l&这一块没看明白。\l是把&（匹配到的大写字母）转为小写么？   

lbseraph

灿烂小猪 发表于 2013-05-29 13:59
回复 6# lbseraph

对的，而\u是把匹配到的小写转换成大写。

参考链接：
http://www.cnblogs.com/cbscan/articles/2277351.html

灿烂小猪

晓得了，谢谢哈。

dn833

回复 5# 灿烂小猪


    把所有大写字母变成小写。就这一个l=lowercase
用info sed命令，第3.5章节s替换参数里有详细介绍

1. 3.5 The `s' Command
   
2. ===================
   
3. 
   
4. The syntax of the `s' (as in substitute) command is
   
5. `s/REGEXP/REPLACEMENT/FLAGS'.  The `/' characters may be uniformly
   
6. replaced by any other single character within any given `s' command.
   
7. The `/' character (or whatever other character is used in its stead)
   
8. can appear in the REGEXP or REPLACEMENT only if it is preceded by a `\'
   
9. character.
   
10. 
    
11.    The `s' command is probably the most important in `sed' and has a
    
12. lot of different options.  Its basic concept is simple: the `s' command
    
13. attempts to match the pattern space against the supplied REGEXP; if the
    
14. match is successful, then that portion of the pattern space which was
    
15. matched is replaced with REPLACEMENT.
    
16. 
    
17.    The REPLACEMENT can contain `\N' (N being a number from 1 to 9,
    
18. inclusive) references, which refer to the portion of the match which is
    
19. contained between the Nth `\(' and its matching `\)'.  Also, the
    
20. REPLACEMENT can contain unescaped `&' characters which reference the
    
21. whole matched portion of the pattern space.  Finally, as a GNU `sed'
    
22. extension, you can include a special sequence made of a backslash and
    
23. one of the letters `L', `l', `U', `u', or `E'.  The meaning is as
    
24. follows:
    
25. 
    
26. `\L'
    
27.      Turn the replacement to lowercase until a `\U' or `\E' is found,
    
28. 
    
29. `\l'
    
30.      Turn the next character to lowercase,
    
31. 
    
32. `\U'
    
33.      Turn the replacement to uppercase until a `\L' or `\E' is found,
    
34. 
    
35. `\u'
    
36.      Turn the next character to uppercase,
    
37. 
    
38. `\E'
    
39.      Stop case conversion started by `\L' or `\U'.

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