1 /* $NetBSD: compat_unsetenv.c,v 1.4 2015/01/20 18:31:24 christos Exp $ */
4 * Copyright (c) 1987, 1993
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32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid
[] = "from: @(#)setenv.c 8.1 (Berkeley) 6/4/93";
37 __RCSID("$NetBSD: compat_unsetenv.c,v 1.4 2015/01/20 18:31:24 christos Exp $");
39 #endif /* LIBC_SCCS and not lint */
41 #define __LIBC12_SOURCE__
42 #include "namespace.h"
47 #include <compat/include/stdlib.h>
49 #include <bitstring.h>
53 __weak_alias(unsetenv
,_unsetenv
)
58 __warn_references(unsetenv
,
59 "warning: reference to compatibility unsetenv();"
60 " include <stdlib.h> for correct reference")
64 * Delete environmental variable "name".
67 unsetenv(const char *name
)
71 _DIAGASSERT(name
!= NULL
);
73 l_name
= strlen(name
);
74 if (__writelockenv()) {
77 while ((offset
= __getenvslot(name
, l_name
, false)) != -1) {
79 for (p
= &environ
[offset
]; ; ++p
) {
80 if ((*p
= *(p
+ 1)) == NULL
)