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45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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/* Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C 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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifndef HAVE_GNU_LD
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#define __environ environ
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#endif
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/* Return the value of the environment variable NAME. */
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char *
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DEFUN(getenv, (name), register CONST char *name)
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{
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register CONST size_t len = strlen(name);
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register char **ep;
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if (__environ == NULL)
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return NULL;
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for (ep = __environ; *ep != NULL; ++ep)
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if (!strncmp(*ep, name, len) && (*ep)[len] == '=')
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return &(*ep)[len + 1];
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return NULL;
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}
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