Re: Write to executable which has done execve

On Aug 11, 5:30 pm, Bronson <psh...@xxxxxxxxx> wrote:

i am trying to make a program, which will exec another app and this
app will write to the main's program executable. I make execve
(precisely execlp) and try to open old file for writing in new
process. But I returns me ETXTBSY. Why? For example access says, that
i can write to file, but fopen fails with ETXTBSY...
What can i do with that...

You can't do it that way. You cannot modify a program's running image
by modifying the executable file. If you could, self-modifying code
would not work properly.

DS

.

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