9696 add /etc/system.d support
Portions contributed by: Andy Fiddaman <andy@omniosce.org>
Reviewed by: Hans Rosenfeld <hans.rosenfeld@joyent.com>
Reviewed by: Peter Tribble <peter.tribble@gmail.com>
Reviewed by: C Fraire <cfraire@me.com>
Reviewed by: Toomas Soome <tsoome@me.com>

          --- old/usr/src/cmd/nsadmin/system
          +++ new/usr/src/cmd/nsadmin/system
   1      -*ident  "%Z%%M% %I%     %E% SMI" /* SVR4 1.5 */
   2    1  *
   3    2  * CDDL HEADER START
   4    3  *
   5    4  * The contents of this file are subject to the terms of the
   6    5  * Common Development and Distribution License, Version 1.0 only
   7    6  * (the "License").  You may not use this file except in compliance
   8    7  * with the License.
   9    8  *
  10    9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  11   10  * or http://www.opensolaris.org/os/licensing.

  12   11  * See the License for the specific language governing permissions
  13   12  * and limitations under the License.
  14   13  *
  15   14  * When distributing Covered Code, include this CDDL HEADER in each
  16   15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

  17   16  * If applicable, add the following below this CDDL HEADER, with the
  18   17  * fields enclosed by brackets "[]" replaced with your own identifying
  19   18  * information: Portions Copyright [yyyy] [name of copyright owner]
  20   19  *
  21   20  * CDDL HEADER END
  22   21  *
  23   22  *
  24   23  * SYSTEM SPECIFICATION FILE
  25   24  *
  26   25  
       26 +* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! NOTE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
       27 +*
       28 +* It is not recommended to edit this file directly but rather
       29 +* to deliver configuration fragments into files under /etc/system.d;
       30 +* files in /etc/system.d are combined in alphabetical order and read by
       31 +* the kernel before this file (/etc/system) is processed.
       32 +*
       33 +* Refer to the system(4) manual page for more information and
       34 +* recommendations on naming fragment files.
       35 +*
       36 +* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! NOTE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
       37 +
  27   38  * moddir:
  28   39  *
  29   40  *       Set the search path for modules.  This has a format similar to the
  30   41  *       csh path variable. If the module isn't found in the first directory
  31   42  *       it tries the second and so on. The default is /kernel /usr/kernel
  32   43  *
  33   44  *       Example:
  34   45  *               moddir: /kernel /usr/kernel /other/modules
  35   46  
  36   47  

  37   48  
  38   49  * root device and root filesystem configuration:
  39   50  *
  40   51  *       The following may be used to override the defaults provided by
  41   52  *       the boot program:
  42   53  *
  43   54  *       rootfs:         Set the filesystem type of the root.
  44   55  *
  45   56  *       rootdev:        Set the root device.  This should be a fully
  46   57  *                       expanded physical pathname.  The default is the
  47   58  *                       physical pathname of the device where the boot
  48   59  *                       program resides.  The physical pathname is
  49   60  *                       highly platform and configuration dependent.
  50   61  *
  51   62  *       Example:
  52   63  *               rootfs:ufs
  53   64  *               rootdev:/sbus@1,f8000000/esp@0,800000/sd@3,0:a
  54   65  *
  55   66  *       (Swap device configuration should be specified in /etc/vfstab.)
  56   67  
  57   68  
  58   69  
  59   70  * exclude:
  60   71  *
  61   72  *       Modules appearing in the moddir path which are NOT to be loaded,
  62   73  *       even if referenced. Note that `exclude' accepts either a module name,
  63   74  *       or a filename which includes the directory.
  64   75  *

  65   76  *       Examples:
  66   77  *               exclude: win
  67   78  *               exclude: sys/shmsys
  68   79  
  69   80  
  70   81  
  71   82  * forceload:
  72   83  *
  73   84  *       Cause these modules to be loaded at boot time, (just before mounting
  74   85  *       the root filesystem) rather than at first reference. Note that
  75      -*       forceload expects a filename which includes the directory. Also
       86 +*       forceload expects a filename which includes the directory. Also
  76   87  *       note that loading a module does not necessarily imply that it will
  77   88  *       be installed.
  78   89  *
  79   90  *       Example:
  80   91  *               forceload: drv/foo
  81   92  
  82   93  
  83   94  
  84   95  * set:
  85   96  *

  86   97  *       Set an integer variable in the kernel or a module to a new value.
  87   98  *       This facility should be used with caution.  See system(4).
  88   99  *
  89  100  *       Examples:
  90  101  *
  91  102  *       To set variables in 'unix':
  92  103  *
  93  104  *               set nautopush=32
  94  105  *               set maxusers=40
  95  106  *
  96  107  *       To set a variable named 'debug' in the module named 'test_module'
  97  108  *
  98  109  *               set test_module:debug = 0x13
  99  110  

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