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中国DOS联盟论坛 » DOS批处理 & 脚本技术（批处理室） » How to express special characters in sed? View 1,661　Replies 10
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Original Poster Posted 2006-08-15 14:30　·　 中国 江苏 常州 金坛区 电信
jtyuer
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I want to use sed to modify a passage in the txtsetup.sif file, changing
SetupSourcePath = "\"
to
SetupSourcePath = "\WINXP\ACER\"
I know that \ is an escape character, but I have tried many methods and all prompt errors. The following are what I have tried:
sed -i "s/SetupSourcePath = "\"/SetupSourcePath = "\WINXP\ACER\"/g" txtsetup.sif
sed -i "s/SetupSourcePath = "\\"/SetupSourcePath = "\\WINXP\\ACER\\"/g" txtsetup.sif
sed -i "s/SetupSourcePath = "\\\"/SetupSourcePath = "\\\WINXP\\\ACER\\\"/g" txtsetup.sif
sed -i "s/SetupSourcePath = "\/"/SetupSourcePath = "\/WINXP\/ACER\/"/g" txtsetup.sif
There are others, but each time it is executed, an error is prompted, generally saying that the s parameter is incorrect. If changed to
sed -i "s/SetupSourcePath/SetupSourcePathWINXP/g" txtsetup.sif
In this way, there is no problem, so I am sure that I expressed the \ special character in sed incorrectly. I hope the bosses can take a look and help correct this. Thank you everyone!
Floor 2 Posted 2006-08-16 11:26　·　 中国 江苏 常州 金坛区 电信
jtyuer
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Guys, help out, please. Let's see how to modify the above.
Floor 3 Posted 2006-08-16 20:44　·　 中国 江苏 常州 金坛区 电信
jtyuer
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Regardless of right or wrong, everyone give an opinion, please!!!!!
Floor 4 Posted 2006-08-16 21:29　·　 中国 辽宁 锦州 中移铁通
无奈何
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The problem of double quotes in CMD is quite a headache. A simple way is to use the ASCII code value 22 to represent " , which is converted to the regular expression as \x22. Please refer to the following approach:


1、sed "s/SetupSourcePath = \x22\\\x22/SetupSourcePath = \x22\\WINXP\\ACER\\\x22/" txtsetup.sif

2、sed "s/SetupSourcePath = \x22\\/&WINXP\\ACER\\/" txtsetup.sif
　　☆开始\运行 (WIN+R)☆
%ComSpec% /cset,=何奈无──　。何奈可无是原，事奈无做人奈无&for,/l,%i,in,(22,-1,0)do,@call,set/p= %,:~%i,1%<nul&ping/n 1 127.1>nul

Floor 5 Posted 2006-08-16 22:01　·　 中国 江苏 常州 金坛区 电信
jtyuer
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Originally posted by Helplessness at 2006-8-16 21:29:
The problem of double quotes in CMD is quite frustrating. A simple way is to use the ASCII code value 22 to represent "，which is converted to the regular expression as \x22. Please refer to the following approach:


1、sed "s/SetupSourcePath = ...

Thank you for the moderator's reply! But I tried it, and neither of the two commands worked. Could it be a problem with my version of sed?
Floor 6 Posted 2006-08-16 22:12　·　 中国 辽宁 锦州 中移铁通
无奈何
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It tests well on my side. Post the error message. What version of SED are you using? If you want good support for the -i parameter, it is recommended to use GNU sed 4.14.

C:\TEST>sed "s/SetupSourcePath = \x22\\/&WINXP\\ACER\\/" t.txt
SetupSourcePath = "\WINXP\ACER\"
C:\TEST>sed "s/SetupSourcePath = \x22\\\x22/SetupSourcePath = \x22\\WINXP\\ACER\
\\x22/" t.txt
SetupSourcePath = "\WINXP\ACER\"
C:\TEST>
　　☆开始\运行 (WIN+R)☆
%ComSpec% /cset,=何奈无──　。何奈可无是原，事奈无做人奈无&for,/l,%i,in,(22,-1,0)do,@call,set/p= %,:~%i,1%<nul&ping/n 1 127.1>nul

Floor 7 Posted 2006-08-16 23:44　·　 中国 江苏 常州 金坛区 电信
jtyuer
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The result using GNU Sed 4.1.4 recommended by GM:
Floor 8 Posted 2006-08-17 00:06　·　 中国 江苏 常州 金坛区 电信
jtyuer
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Thanks to the great help of Wu Nai He, the problem has been solved. It turned out to be the problem of the sed version I was using, which was probably too old. Thanks again to the moderator!
Floor 9 Posted 2008-03-29 14:41　·　 中国 上海 奉贤区 电信
flyingphf
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I want to ask, if there is/ how to represent it
Floor 10 Posted 2008-03-29 14:49　·　 中国 湖北 武汉 电信
ThinKing
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Originally posted by flyingphf at 2008-3-29 02:41 PM:
I want to ask, if there is /, how to represent it?

Change a delimiter.

eg : sed "s~http://~ftp://~g" ufile

[ Last edited by ThinKing on 2008-3-29 at 02:51 PM ]
Floor 11 Posted 2008-03-29 15:00　·　 中国 台湾 宜兰县 中华电信
sylovanas
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/也可以 ascii /是2F
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