Annotation of src/usr.bin/printenv/printenv.c, Revision 1.5
1.5 ! deraadt 1: /* $OpenBSD: printenv.c,v 1.4 2003/06/03 02:56:14 millert 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: #ifndef lint
33: char copyright[] =
34: "@(#) Copyright (c) 1987 Regents of the University of California.\n\
35: All rights reserved.\n";
36: #endif /* not lint */
37:
38: #ifndef lint
39: /*static char sccsid[] = "from: @(#)printenv.c 5.4 (Berkeley) 6/1/90";*/
1.5 ! deraadt 40: static char rcsid[] = "$OpenBSD: printenv.c,v 1.4 2003/06/03 02:56:14 millert Exp $";
1.1 deraadt 41: #endif /* not lint */
42:
43: #include <stdio.h>
44: #include <string.h>
45: #include <stdlib.h>
46:
47: /*
48: * printenv
49: *
50: * Bill Joy, UCB
51: * February, 1979
52: */
53: int
1.5 ! deraadt 54: main(int argc, char *argv[])
1.1 deraadt 55: {
56: extern char **environ;
1.3 mpech 57: char *cp, **ep;
58: int len;
1.1 deraadt 59:
60: if (argc < 2) {
61: for (ep = environ; *ep; ep++)
62: puts(*ep);
63: exit(0);
64: }
65: len = strlen(*++argv);
66: for (ep = environ; *ep; ep++)
67: if (!strncmp(*ep, *argv, len)) {
68: cp = *ep + len;
69: if (!*cp || *cp == '=') {
70: puts(*cp ? cp + 1 : cp);
71: exit(0);
72: }
73: }
74: exit(1);
75: }