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Full Discussion: Insert string in binary file at top
Top Forums UNIX for Advanced & Expert Users Insert string in binary file at top Post 302526307 by kumaran_5555 on Tuesday 31st of May 2011 06:15:00 AM
Old 05-31-2011
Code:
How can i append a EBCDIC string of 100 bytes to 0th position of a binary file in UNIX.

If you are attempting to insert 100 bytes at the end , then it isn't appedning at all. As far as I know, it the File system has to rearrange the blocks to accomadate the new 100 bytes.

So if you are inserting 100 bytes at the head of 60GB file, ideally i think the performance would be appending 60GB data onto a 100bytes file. I guess so.
 

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LEARN ABOUT DEBIAN

radiff2

RADIFF2(1)						    BSD General Commands Manual 						RADIFF2(1)

NAME

     radiff2 -- unified binary diffing utility

SYNOPSIS

     radiff2 [-cCOdrspvh] [-t 0-100] [-g sym] file1 file2

DESCRIPTION

     radiff2 implements many binary diffing algorithms for data and code.

     -c 	 Count number of differences.

     -C 	 Graphdiff code instead of data

     -O 	 Do code diffing with all bytes instead of just the fixed opcode bytes

     -t 0-100	 Choose matching threshold for binary code diffing

     -d 	 Use delta diffing (slower).

     -g sym	 Graph diff output of given symbol

     -r 	 Output in radare commands as a binary patch.

     -s 	 Calculate text distance from two files.

     -p 	 Use physical addressing (io.va=0)

     -v 	 Show version information.

     -h 	 Show usage help message.

SEE ALSO

     radare2(1), rafind2(1), rahash2(1), rabin2(1), ranal2(1), rasm2(1), ragg2(1), rarun2(1), rax2(1),

AUTHORS

     pancake <pancake@nopcode.org>, nibble <nibble@develsec.org>

BSD
								   Oct 20, 2011 							       BSD
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