usr/src/lib/libast/common/preroot/realopen.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  * AT&T Bell Laboratories
  25  * disable preroot and open path relative to the real root
  26  */
  27
  28 #include <ast.h>
  29 #include <preroot.h>
  30
  31 #if FS_PREROOT
  32
  33 int
  34 realopen(const char* path, int mode, int perm)
  35 {
  36         char            buf[PATH_MAX + 8];
  37
  38         if (*path != '/' || !ispreroot(NiL)) return(-1);
  39         strcopy(strcopy(buf, PR_REAL), path);
  40         return(open(buf, mode, perm));
  41 }
  42
  43 #else
  44
  45 NoN(realopen)
  46
  47 #endif