usr/src/lib/libast/common/comp/setenv.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 #define setenv          ______setenv
  25
  26 #include <ast.h>
  27
  28 #undef  setenv
  29 #undef  _lib_setenv     /* procopen() calls setenv() */
  30
  31 #if _lib_setenv
  32
  33 NoN(setenv)
  34
  35 #else
  36
  37 #undef  _def_map_ast
  38 #include <ast_map.h>
  39
  40 #if defined(__EXPORT__)
  41 #define extern  __EXPORT__
  42 #endif
  43
  44 extern int
  45 setenv(const char* name, const char* value, int overwrite)
  46 {
  47         char*   s;
  48
  49         if (overwrite || !getenv(name))
  50         {
  51                 if (!(s = sfprints("%s=%s", name, value)) || !(s = strdup(s)))
  52                         return -1;
  53                 return setenviron(s) ? 0 : -1;
  54         }
  55         return 0;
  56 }
  57
  58 #endif