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/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
This file based on putenv.c in 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
/*
@deftypefn Supplemental int putenv (const char *@var{string})
Uses @code{setenv} or @code{unsetenv} to put @var{string} into
the environment or remove it. If @var{string} is of the form
@samp{name=value} the string is added; if no @samp{=} is present the
name is unset/removed.
@end deftypefn
*/
#if defined (_AIX) && !defined (__GNUC__)
#pragma alloca
#endif
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include "ansidecl.h"
#define putenv libiberty_putenv
#if HAVE_STDLIB_H
# include <stdlib.h>
#endif
#if HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#else
# ifndef alloca
# ifdef __GNUC__
# define alloca __builtin_alloca
# else
extern char *alloca ();
# endif /* __GNUC__ */
# endif /* alloca */
#endif /* HAVE_ALLOCA_H */
#undef putenv
/* Below this point, it's verbatim code from the glibc-2.0 implementation */
/* Put STRING, which is of the form "NAME=VALUE", in the environment. */
int
putenv (const char *string)
{
const char *const name_end = strchr (string, '=');
if (name_end)
{
char *name = (char *) alloca (name_end - string + 1);
memcpy (name, string, name_end - string);
name[name_end - string] = '\0';
return setenv (name, name_end + 1, 1);
}
unsetenv (string);
return 0;
}
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