1*ebfedea0SLionel Sambuc /* $NetBSD: unsetenv.c,v 1.1.1.1 2011/04/13 18:15:44 elric Exp $ */
2*ebfedea0SLionel Sambuc
3*ebfedea0SLionel Sambuc /*
4*ebfedea0SLionel Sambuc * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
5*ebfedea0SLionel Sambuc * (Royal Institute of Technology, Stockholm, Sweden).
6*ebfedea0SLionel Sambuc * All rights reserved.
7*ebfedea0SLionel Sambuc *
8*ebfedea0SLionel Sambuc * Redistribution and use in source and binary forms, with or without
9*ebfedea0SLionel Sambuc * modification, are permitted provided that the following conditions
10*ebfedea0SLionel Sambuc * are met:
11*ebfedea0SLionel Sambuc *
12*ebfedea0SLionel Sambuc * 1. Redistributions of source code must retain the above copyright
13*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer.
14*ebfedea0SLionel Sambuc *
15*ebfedea0SLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
16*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer in the
17*ebfedea0SLionel Sambuc * documentation and/or other materials provided with the distribution.
18*ebfedea0SLionel Sambuc *
19*ebfedea0SLionel Sambuc * 3. Neither the name of the Institute nor the names of its contributors
20*ebfedea0SLionel Sambuc * may be used to endorse or promote products derived from this software
21*ebfedea0SLionel Sambuc * without specific prior written permission.
22*ebfedea0SLionel Sambuc *
23*ebfedea0SLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24*ebfedea0SLionel Sambuc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*ebfedea0SLionel Sambuc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*ebfedea0SLionel Sambuc * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27*ebfedea0SLionel Sambuc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*ebfedea0SLionel Sambuc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*ebfedea0SLionel Sambuc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*ebfedea0SLionel Sambuc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*ebfedea0SLionel Sambuc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*ebfedea0SLionel Sambuc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*ebfedea0SLionel Sambuc * SUCH DAMAGE.
34*ebfedea0SLionel Sambuc */
35*ebfedea0SLionel Sambuc
36*ebfedea0SLionel Sambuc #include <config.h>
37*ebfedea0SLionel Sambuc
38*ebfedea0SLionel Sambuc #include <stdlib.h>
39*ebfedea0SLionel Sambuc #include <string.h>
40*ebfedea0SLionel Sambuc
41*ebfedea0SLionel Sambuc #include <krb5/roken.h>
42*ebfedea0SLionel Sambuc
43*ebfedea0SLionel Sambuc #if !HAVE_DECL_ENVIRON
44*ebfedea0SLionel Sambuc extern char **environ;
45*ebfedea0SLionel Sambuc #endif
46*ebfedea0SLionel Sambuc
47*ebfedea0SLionel Sambuc /*
48*ebfedea0SLionel Sambuc * unsetenv --
49*ebfedea0SLionel Sambuc */
50*ebfedea0SLionel Sambuc ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
unsetenv(const char * name)51*ebfedea0SLionel Sambuc unsetenv(const char *name)
52*ebfedea0SLionel Sambuc {
53*ebfedea0SLionel Sambuc int len;
54*ebfedea0SLionel Sambuc const char *np;
55*ebfedea0SLionel Sambuc char **p;
56*ebfedea0SLionel Sambuc
57*ebfedea0SLionel Sambuc if (name == 0 || environ == 0)
58*ebfedea0SLionel Sambuc return;
59*ebfedea0SLionel Sambuc
60*ebfedea0SLionel Sambuc for (np = name; *np && *np != '='; np++)
61*ebfedea0SLionel Sambuc /* nop */;
62*ebfedea0SLionel Sambuc len = np - name;
63*ebfedea0SLionel Sambuc
64*ebfedea0SLionel Sambuc for (p = environ; *p != 0; p++)
65*ebfedea0SLionel Sambuc if (strncmp(*p, name, len) == 0 && (*p)[len] == '=')
66*ebfedea0SLionel Sambuc break;
67*ebfedea0SLionel Sambuc
68*ebfedea0SLionel Sambuc for (; *p != 0; p++)
69*ebfedea0SLionel Sambuc *p = *(p + 1);
70*ebfedea0SLionel Sambuc }
71*ebfedea0SLionel Sambuc
72