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/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char *
getenv (const char *name)
{
if (__environ == NULL || name[0] == '\0')
return NULL;
size_t len = strlen (name);
for (char **ep = __environ; *ep != NULL; ++ep)
{
if (name[0] == (*ep)[0]
&& strncmp (name, *ep, len) == 0 && (*ep)[len] == '=')
return *ep + len + 1;
}
return NULL;
}
libc_hidden_def (getenv)
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