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Herman J. Radtke III

Tag: #dtruss

Proving getenv Does Not Make a Syscall

I saw this statement in an accepted answer on Stack Overflow:

Retrieving the value of an environment variable will incur a system call.


This answer surprised me as I did not think this was the case. There is an edit farther down that has links to other Stack Overflow posts saying get getenv does not make a syscall. Let us prove it ourselves.