mirror of git://gcc.gnu.org/git/gcc.git
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
/* Copyright (C) 1991, 1994, 1995, 1996, 2002 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;
|
|
}
|