1*0bd1216cSderaadt /* $OpenBSD: printenv.c,v 1.8 2015/10/09 01:37:08 deraadt Exp $ */
21258a77dSderaadt
3df930be7Sderaadt /*
4df930be7Sderaadt * Copyright (c) 1987 Regents of the University of California.
5df930be7Sderaadt * All rights reserved.
6df930be7Sderaadt *
7df930be7Sderaadt * Redistribution and use in source and binary forms, with or without
8df930be7Sderaadt * modification, are permitted provided that the following conditions
9df930be7Sderaadt * are met:
10df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright
11df930be7Sderaadt * notice, this list of conditions and the following disclaimer.
12df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright
13df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the
14df930be7Sderaadt * documentation and/or other materials provided with the distribution.
15f75387cbSmillert * 3. Neither the name of the University nor the names of its contributors
16df930be7Sderaadt * may be used to endorse or promote products derived from this software
17df930be7Sderaadt * without specific prior written permission.
18df930be7Sderaadt *
19df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20df930be7Sderaadt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21df930be7Sderaadt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22df930be7Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23df930be7Sderaadt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24df930be7Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25df930be7Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26df930be7Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27df930be7Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28df930be7Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29df930be7Sderaadt * SUCH DAMAGE.
30df930be7Sderaadt */
31df930be7Sderaadt
32df930be7Sderaadt #include <stdio.h>
33df930be7Sderaadt #include <string.h>
34df930be7Sderaadt #include <stdlib.h>
351d9f09f5Sderaadt #include <unistd.h>
361d9f09f5Sderaadt #include <err.h>
37df930be7Sderaadt
38df930be7Sderaadt /*
39df930be7Sderaadt * printenv
40df930be7Sderaadt *
41df930be7Sderaadt * Bill Joy, UCB
42df930be7Sderaadt * February, 1979
43df930be7Sderaadt */
44df930be7Sderaadt int
main(int argc,char * argv[])451837a5caSderaadt main(int argc, char *argv[])
46df930be7Sderaadt {
47df930be7Sderaadt extern char **environ;
48c0932ef1Smpech char *cp, **ep;
49c0932ef1Smpech int len;
50df930be7Sderaadt
51*0bd1216cSderaadt if (pledge("stdio", NULL) == -1)
52*0bd1216cSderaadt err(1, "pledge");
531d9f09f5Sderaadt
54df930be7Sderaadt if (argc < 2) {
55df930be7Sderaadt for (ep = environ; *ep; ep++)
56df930be7Sderaadt puts(*ep);
57df930be7Sderaadt exit(0);
58df930be7Sderaadt }
59df930be7Sderaadt len = strlen(*++argv);
60df930be7Sderaadt for (ep = environ; *ep; ep++)
61df930be7Sderaadt if (!strncmp(*ep, *argv, len)) {
62df930be7Sderaadt cp = *ep + len;
63df930be7Sderaadt if (!*cp || *cp == '=') {
64df930be7Sderaadt puts(*cp ? cp + 1 : cp);
65df930be7Sderaadt exit(0);
66df930be7Sderaadt }
67df930be7Sderaadt }
68df930be7Sderaadt exit(1);
69df930be7Sderaadt }
70