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39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/* Copyright (C) 1991-2024 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 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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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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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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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char *
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getenv (const char *name)
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{
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if (__environ == NULL || name[0] == '\0')
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return NULL;
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size_t len = strlen (name);
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for (char **ep = __environ; *ep != NULL; ++ep)
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{
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if (name[0] == (*ep)[0]
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&& strncmp (name, *ep, len) == 0 && (*ep)[len] == '=')
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return *ep + len + 1;
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}
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return NULL;
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}
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libc_hidden_def (getenv)
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