/* See LICENSE file for copyright and license details. */ #include <stdio.h> #include <stdlib.h> #include "util.h" extern char **environ; static void usage(void) { eprintf("usage: %s [variable...]\n", argv0); } int main(int argc, char *argv[]) { char *var; ARGBEGIN { default: usage(); } ARGEND; if(argc == 1) { while(*environ) printf("%s\n", *environ++); return EXIT_SUCCESS; } while(*++argv) { if((var = getenv(*argv))) printf("%s\n", var); } return EXIT_SUCCESS; }