how to add a string to the beginning of a large binary file?

[could ildg]

I want to add a string such as "I love you" to the beginning of a binary file,
How to? and how to delete the string if I want to get the original file?

thanks.

 

[Patrick Useldinger]

I want to add a string such as "I love you" to the beginning of a binary file,
How to? and how to delete the string if I want to get the original file?

You shouldn't use Python to write a virus

-pu

 

[could ildg]

I'm not going to,
I just want to know how to manipulate a large file and insert or
delete some stuff in it.

 

[Fredrik Lundh]

I just want to know how to manipulate a large file and insert or
delete some stuff in it.

you cannot insert or delete stuff in files in contemporary operating systems;
all you can do is to overwrite parts of the file, or add/remove stuff at the end
of the file.

to change a file in any other way, you have to create a new file (either by
loading the old file into memory, or by copying the contents of the old file
to a new temporary file, and removing/renaming the files when you're done)

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