usr/src/lib/libast/common/path/pathbin.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  * Glenn Fowler
  25  * AT&T Bell Laboratories
  26  *
  27  * return current PATH
  28  */
  29
  30 #include <ast.h>
  31
  32 char*
  33 pathbin(void)
  34 {
  35         register char*  bin;
  36
  37         static char*    val;
  38
  39         if ((!(bin = getenv("PATH")) || !*bin) && !(bin = val))
  40         {
  41                 if (!*(bin = astconf("PATH", NiL, NiL)) || !(bin = strdup(bin)))
  42                         bin = "/bin:/usr/bin:/usr/local/bin";
  43                 val = bin;
  44         }
  45         return bin;
  46 }