Question

Which of the following functions is used for handling environment variables of a process?

(a) getenv

(b) setenv

(c) letenv

(d) getenv and setenv

I had been asked this question in quiz.

I need to ask this question from Process Control Basics in portion System Programming II – Process Control & Unix System Performance of Unix

Answer 1

Right answer is (d) getenv and setenv

To explain I would say: Forking mechanism also transmits the parent’s environment to the child since environment variables are constituents of parent’s address space. POSIX specifies two functions getenv and setenv for handlings environment variables.