/etc/system

ssklaude

*ident        "@(#)system        1.18        97/06/27 SMI" /* SVR4 1.5 */
*
* SYSTEM SPECIFICATION FILE
*

* moddir:
*
*        Set the search path for modules.  This has a format similar to the
*        csh path variable. If the module isn't found in the first directory
*        it tries the second and so on. The default is /kernel /usr/kernel
*
*        Example:
*                moddir: /kernel /usr/kernel /other/modules
   通过使用moddir: 搜索模块目录列表，可以修改默认的路经


* root device and root filesystem configuration:
*
*        The following may be used to override the defaults provided by
*        the boot program:
*
*        rootfs:                Set the filesystem type of the root.
*        用来标志根文件系统类型
*        rootdev:        Set the root device.  This should be a fully
*                        expanded physical pathname.  The default is the
*                        physical pathname of the device where the boot
*                        program resides.  The physical pathname is
*                        highly platform and configuration dependent.
*         用来标示根设备和引导程序驻留的设备不同（指定根设备）
*        Example:
*                rootfs:ufs
*                rootdev:/sbus@1,f8000000/esp@0,800000/sd@3,0:a
*
*        (Swap device configuration should be specified in /etc/vfstab.)



* exclude:
*
*        Modules appearing in the moddir path which are NOT to be loaded,
*        even if referenced. Note that `exclude' accepts either a module name,
*        or a filename which includes the directory.
*
*        Examples:
*                exclude: win
*                exclude: sys/shmsys
        不再使用的模块通过exclude: 来排除


* forceload:
*
*        Cause these modules to be loaded at boot time, (just before mounting
*        the root filesystem) rather than at first reference. Note that
*         forceload expects a filename which includes the directory. Also
*        note that loading a module does not necessarily imply that it will
*        be installed.
*
*        Example:
*                forceload: drv/foo
        使用forceload: 需要在初始化时强制加载的模块


* set:
*
*        Set an integer variable in the kernel or a module to a new value.
*        This facility should be used with caution.  See system(4).
*
*        Examples:
*
*        To set variables in 'unix':
*
*                set nautopush=32
*                set maxusers=40
*
*        To set a variable named 'debug' in the module named 'test_module'
*
*                set test_module:debug = 0x13