In this task, we study how environment variables are affected when a new program is executed via execve$().$

The function execve$()$ calls a system call to load a new command and execute it; this function never returns. No new process is created; instead, the calling process$$s text, data, bss$,$ and stack are overwritten by

that of the program loaded. Essentially, execve$()$ runs the new program inside the calling process. We

are interested in what happens to the environment variables; are they automatically inherited by the new

program?

Step $1.$ Please compile and run the following program, and describe your observation. This program

simply executes a program called $/$usr$/$bin$/$env$,$ which prints out the environment variables of the

current process.