[ SHELL 水平测试 ][ SED 篇 ]

lightspeed

[quote]原帖由 "ZealeS"]哪些东西比较久了吗？哪里有新点的。[/quote 发表：


I forgot the site. You can google it and may find some newer
editions but not latest one.

r2007

sed & awk不错，收藏。
谢谢！

shaoping0330

求证：是否是sed的bug？？？

原帖由 "r2007" 发表：

#!/bin/sed -f
s/$/\naAbBbCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ/
:a
s/\b\([a-z]\)\(.*\n.*\)\1\(.\)/\3\2\1\3/                                       
ta
s/\n.*//

把每个单词的首写字母改为大写。上面这个程序略有错误（把小写的c误写为小写b了）。另外，发现一个sed的bug：
$ echo A|sed 's/[A-z]/9/'
9                                    ＝＝＝？？？
$ echo A|sed 's/[A-Z]/9/'
9                                    ＝＝＝正常
$ echo A|sed 's/[a-z]/9/'
9                                    ＝＝＝不正常
$ echo A|sed 's/[a-Z]/9/'
9                                    ＝＝＝？？？

$ echo a|sed 's/[A-z]/9/'
a                                    ＝＝＝？？？
$ echo a|sed 's/[a-Z]/9/'
9                                    ＝＝＝？？？
$ echo a|sed 's/[a-z]/9/'
9                                    ＝＝＝正常
$ echo a|sed 's/[A-Z]/9/'
a                                    ＝＝＝正常

不知为何[a-z]包括了大写字母A。结果导致，如果直接使用r2004的程式将会把全部单词改写为“Z”开头的词，不知各位的机器上是否也如此？？

如果换成下面的就很正常了：
s/$/\naAbBbCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ/
:a
s/\b\([abcdefghijklmnopqrstuvwxyz]\)\(.*\n.*\)\1\(.\)/\3\2\1\3/                                       
ta
s/\n.*//

GNU sed version 4.0.5
Red Hat Linux release 9 (Shrike)

r2007

手头没有环境测试，建议看一下你的LC_ALL是否设置正确？
我怀疑是它的问题。

欧阳不修

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shaoping0330

# locale  （root用户，bash）
LANG=en_US
LC_CTYPE="en_US"
LC_NUMERIC="en_US"
LC_TIME="en_US"
LC_COLLATE="en_US"
LC_MONETARY="en_US"
LC_MESSAGES="en_US"
LC_PAPER="en_US"
LC_NAME="en_US"
LC_ADDRESS="en_US"
LC_TELEPHONE="en_US"
LC_MEASUREMENT="en_US"
LC_IDENTIFICATION="en_US"
LC_ALL=
安装后的默认设置，都没有修改。
另外一台机用：
$ locale   （普通用户，bash）
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

及
# locale （root用户，tcsh）
LANG=zh_CN.gbk
LC_CTYPE="zh_CN.gbk"
LC_NUMERIC="zh_CN.gbk"
LC_TIME="zh_CN.gbk"
LC_COLLATE="zh_CN.gbk"
LC_MONETARY="zh_CN.gbk"
LC_MESSAGES="zh_CN.gbk"
LC_PAPER="zh_CN.gbk"
LC_NAME="zh_CN.gbk"
LC_ADDRESS="zh_CN.gbk"
LC_TELEPHONE="zh_CN.gbk"
LC_MEASUREMENT="zh_CN.gbk"
LC_IDENTIFICATION="zh_CN.gbk"
LC_ALL=

分布运行那个sed脚本文件，最后全部都把单词的第一个字母替换为Z！其间，分别把LC_ALL设置为同LANG相同的值，也如此！

r2007

Try

1. env LANG=C your sed script
   
2. or
   
3. env LANG=POSIX your sed script
   

复制代码

shaoping0330

多谢r2007兄，小弟又长见识了！

现在知道了，通常我们的区域化资料库，即locale查看时，有：
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE=C
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

多项，其优先顺序为 LC_ALL >LC_*>LANG，其中：
LC_COLLATE=C  代表文字排序规则及正则表达式的比较依据
其他是一些时间、地址、货币、数字等表示方式。
所以，实际上只要修改LC_COLLATE即可。

shaoping0330

欧阳兄：
俺不贪心，想要这两本。shaoping0330@163.com
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欧阳不修

shaoping0330   已经发了，请查收；对书贪心也没关系的：）