diff options
Diffstat (limited to 'pkgtools/pkg_install/files/lib/unsetenv.c')
-rw-r--r-- | pkgtools/pkg_install/files/lib/unsetenv.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/pkgtools/pkg_install/files/lib/unsetenv.c b/pkgtools/pkg_install/files/lib/unsetenv.c new file mode 100644 index 00000000000..e713732239b --- /dev/null +++ b/pkgtools/pkg_install/files/lib/unsetenv.c @@ -0,0 +1,63 @@ +/* $NetBSD: unsetenv.c,v 1.1.1.1 2002/12/20 18:14:06 schmonz Exp $ */ + +/*- + * Copyright (c) 1998 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <string.h> +#include <stdlib.h> + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +extern char **environ; + +#ifndef HAVE_UNSETENV +void +unsetenv(name) + const char *name; +{ + size_t len = strlen(name); + char **ptr, **p; + + for (ptr = environ; *ptr; ptr++) + if (strncmp(name, *ptr, len) == 0 && (*ptr)[len] == '=') { + for (p = ptr;; ++p) + if (!(*p = *(p + 1))) + break; + } +} +#endif |