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52 lines
1.4 KiB
52 lines
1.4 KiB
/*
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* Copyright (C) 2001 Alan Robertson <alanr@unix.sh>
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* This software licensed under the GNU LGPL.
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <lha_internal.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define __environ environ
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#ifndef HAVE_ENVIRON_DECL
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extern char **environ;
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#endif
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int
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unsetenv (const char *name)
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{
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const size_t len = strlen (name);
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char **ep;
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for (ep = __environ; *ep; ++ep) {
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if (!strncmp (*ep, name, len) && (*ep)[len] == '=') {
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/* Found it. */
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/* Remove this pointer by moving later ones back. */
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char **dp = ep;
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do
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dp[0] = dp[1];
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while (*dp++);
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/* Continue the loop in case NAME appears again. */
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}
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}
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return 0;
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}
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