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