libstuff/unix_standard_mode.c

   1 /*
   2  * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #ifndef RLD
  24 #include <stdlib.h>
  25 #include <strings.h>
  26 #include "stuff/bool.h"
  27 #include "stuff/unix_standard_mode.h"
  28
  29 /*
  30  * get_unix_standard_mode() returns TRUE if we are running in UNIX standard
  31  * command mode (the default).
  32  */
  33 __private_extern__
  34 enum bool
  35 get_unix_standard_mode(
  36 void)
  37 {
  38     static enum bool checked_environment_variable = FALSE;
  39     static enum bool unix_standard_mode = TRUE;
  40     char *p;
  41
  42         if(checked_environment_variable == FALSE){
  43             checked_environment_variable = TRUE;
  44             /*
  45              * Pick up the UNIX standard command mode environment variable.
  46              */
  47             p = getenv("COMMAND_MODE");
  48             if(p != NULL){
  49                 if(strcasecmp("legacy", p) == 0)
  50                     unix_standard_mode = FALSE;
  51             }
  52         }
  53         return(unix_standard_mode);
  54 }
  55 #endif /* !defined(RLD) */