Annotation of src/usr.bin/printenv/printenv.c, Revision 1.7
1.7 ! deraadt 1: /* $OpenBSD: printenv.c,v 1.6 2009/10/27 23:59:41 deraadt Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*
4: * Copyright (c) 1987 Regents of the University of California.
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
1.4 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: #include <stdio.h>
33: #include <string.h>
34: #include <stdlib.h>
1.7 ! deraadt 35: #include <unistd.h>
! 36: #include <err.h>
1.1 deraadt 37:
38: /*
39: * printenv
40: *
41: * Bill Joy, UCB
42: * February, 1979
43: */
44: int
1.5 deraadt 45: main(int argc, char *argv[])
1.1 deraadt 46: {
47: extern char **environ;
1.3 mpech 48: char *cp, **ep;
49: int len;
1.7 ! deraadt 50:
! 51: if (tame("stdio", NULL) == -1)
! 52: err(1, "tame");
1.1 deraadt 53:
54: if (argc < 2) {
55: for (ep = environ; *ep; ep++)
56: puts(*ep);
57: exit(0);
58: }
59: len = strlen(*++argv);
60: for (ep = environ; *ep; ep++)
61: if (!strncmp(*ep, *argv, len)) {
62: cp = *ep + len;
63: if (!*cp || *cp == '=') {
64: puts(*cp ? cp + 1 : cp);
65: exit(0);
66: }
67: }
68: exit(1);
69: }