/* 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; }