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DOS批处理 & 脚本技术（批处理室） » How to express special characters in sed?

Floor1　jtyuer	Posted 2006-08-15 14:30
初级用户　Posts 29　Credits 73
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!

Floor2　jtyuer	Posted 2006-08-16 11:26
初级用户　Posts 29　Credits 73
Guys, help out, please. Let's see how to modify the above.

Floor3　jtyuer	Posted 2006-08-16 20:44
初级用户　Posts 29　Credits 73
Regardless of right or wrong, everyone give an opinion, please!!!!!

Floor4　无奈何	Posted 2006-08-16 21:29
荣誉版主　Posts 356　Credits 1,338
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

Floor5　jtyuer	Posted 2006-08-16 22:01
初级用户　Posts 29　Credits 73
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?

Floor6　无奈何	Posted 2006-08-16 22:12
荣誉版主　Posts 356　Credits 1,338
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>

Floor7　jtyuer	Posted 2006-08-16 23:44
初级用户　Posts 29　Credits 73
The result using GNU Sed 4.1.4 recommended by GM:

Floor8　jtyuer	Posted 2006-08-17 00:06
初级用户　Posts 29　Credits 73
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!

Floor9　flyingphf	Posted 2008-03-29 14:41
中级用户　Posts 142　Credits 392
I want to ask, if there is/ how to represent it

Floor10　ThinKing	Posted 2008-03-29 14:49
中级用户　Posts 207　Credits 471
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 ]