/*
    environment.c
    Jeff Ondich, 4 February 2022

    Accessing environment variables in C.

    Want to see all the environment variables in your current terminal
    session? Try the "env" command. (And, as always, take a look
    at "man env" to learn more.)
*/

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[], char *envp[]) {
    printf("argc=%d\n\n", argc);

    // Use getenv to read the value of an environment variable
    char *home_value = getenv("HOME");
    printf("HOME=%s\n\n", home_value);

    // Iterate through the envp array
    for (char **pointer = envp; *pointer != NULL; ++pointer) {
        printf("%s\n", *pointer);
    }

    return 0;
}