printenv.c

/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>

#include "util.h"

extern char **environ;

int
main(int argc, char *argv[])
{
	char *var;
	int ret = 0;

	argv0 = argv[0], argc--, argv++;

	if (!argc) {
		for (; *environ; environ++)
			puts(*environ);
	} else {
		for (; *argv; argc--, argv++) {
			if ((var = getenv(*argv)))
				puts(var);
			else
				ret = 1;
		}
	}

	return fshut(stdout, "<stdout>") ? 2 : ret;
}