busybox/coreutils/printenv.c

/* vi: set sw=4 ts=4: */
/*
 * printenv implementation for busybox
 *
 * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
 * Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "busybox.h"

int printenv_main(int argc, char **argv)
{
	extern char **environ;
	int e = 0;

	/* no variables specified, show whole env */
	if (argc == 1)
		while (environ[e])
			puts(environ[e++]);

	/* search for specified variables and print them out if found */
	else {
		int i;
		size_t l;
		char *arg, *env;

		for (i=1; (arg = argv[i]); ++i)
			for (; (env = environ[e]); ++e) {
				l = strlen(arg);
				if (!strncmp(env, arg, l) && env[l] == '=')
					puts(env + l + 1);
			}
	}

	fflush_stdout_and_exit(0);
}
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 <stdio.h>
12	#include <string.h>
13	#include <stdlib.h>
14	#include "busybox.h"
15
16	int printenv_main(int argc, char **argv)
17	{
18	extern char **environ;
19	int e = 0;
20
21	/* no variables specified, show whole env */
22	if (argc == 1)
23	while (environ[e])
24	puts(environ[e++]);
25
26	/* search for specified variables and print them out if found */
27	else {
28	int i;
29	size_t l;
30	char arg, env;
31
32	for (i=1; (arg = argv[i]); ++i)
33	for (; (env = environ[e]); ++e) {
34	l = strlen(arg);
35	if (!strncmp(env, arg, l) && env[l] == '=')
36	puts(env + l + 1);
37	}
38	}
39
40	fflush_stdout_and_exit(0);
41	}