is there a way to tell if my executable was launched by/attached to
some other process?
You can use ptrace(2) with the PT_DENY_ATTACH request to prevent
anyone from attaching and will kill the process if it is already being
traced.
See http://steike.com/code/debugging-itunes-with-gdb/
This has been worked around using a simple kernel extension, I don't
know what the current state of it is but it may not be that reliable.
file integrity
You can also use codesign(1) which will alert the user if your binary
has been tampered with since the signing. Note that it doesn't prevent
the user from launching your application and the functions for
determining the integrity of your executable aren't public.
Keith
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