1/* vi: set sw=4 ts=4: */
2/*
3 * printenv implementation for busybox
4 *
5 * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
6 * Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9 */
10
11#include "libbb.h"
12extern char **environ;
13
14int printenv_main(int argc, char **argv);
15int printenv_main(int argc, char **argv)
16{
17	/* no variables specified, show whole env */
18	if (argc == 1) {
19		int e = 0;
20		while (environ[e])
21			puts(environ[e++]);
22	} else {
23		/* search for specified variables and print them out if found */
24		char *arg, *env;
25
26		while ((arg = *++argv) != NULL) {
27			env = getenv(arg);
28			if (env)
29				puts(env);
30		}
31	}
32
33	fflush_stdout_and_exit(0);
34}
35