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Removing ^@ chanracter fromthe end of Linux file

 
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# 1  
Old 09-14-2009
Removing ^@ chanracter fromthe end of Linux file
Hi,

I have a Linux file which has content as shown below

2,Latest Event in RFP_EVENT match Lastest event in Source PRH_RQ_REQUEST,Failed
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@"1"|"RFP_MASTER

I am not sure what these characters are.. I was in an assumption that these are similar to COntol M characters in UNIX environment and tried using the command


perl -pi -e 's/^V^@/ /g' <file_name>

But this does not work. Could someone please help


Thanks,
Bhuvaneswari, S
# 2  
Old 09-14-2009
Can you please try with dos2unix command?
# 3  
Old 09-14-2009
^@ isn't two separate characters, but the representation of the null byte (ASCII code 0), which is usually used to terminate a string. You can remove it using
Code:
perl -i -pe 's/\0/ /g' <yourfile>

but I'd take a look as to why those are written to the file. For example, it's a common attack vector on web servers embedding a null byte in an URL to fool the parser.
# 4  
Old 09-14-2009
Thanks for the reply, I have tried with perl -i -pe 's/\0/ /g' <file_name>, it removed all the ^@ characters.

Thanks for the quick help.
 
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