modstat —
display status of loaded kernel modules
  
    | modstat | [ -Aaek] [-nname | name] | 
The modstat utility displays the status of any kernel
  modules present in the kernel.
The options are as follows:
  - -A
- Tells you whether or not modules can be autoloaded at the moment. This
      option does take into consideration the sysctl
      kern.module.autoload.
- -a
- Tells you whether or not modules can be autoloaded at the moment. This
      option does not take into consideration the sysctl
      kern.module.autoload.
- -e
- Tells you whether or not you may load a module at the moment.
- -k
- Display the kernel address of the module's text segment (disabled by
      default).
- -nname
- Display the status of only the module with this name. Please note that
      -nis optional.
In addition to listing the currently loaded modules' name, the
    information reported by modstat includes:
  - CLASS
- Module class, such as "vfs", "driver",
      "exec", "misc" or "secmodel".
- SOURCE
- Where the module was loaded from.
      “builtin” indicates that the module
      was built into the running kernel.
      “boot” indicates that the module was
      loaded during system bootstrap.
      “filesys” indicates that the module
      was loaded from the file system.
- SIZE
- Size of the module's text section, in bytes.
- FLAG
- The module flags:
    
    
      - a
- Module is auto-loaded.
- f
- Requires the modload(8)
          flag -f(force) to be loaded.
 
 
- REFS
- Number of references held on the module. Disabled builtin modules will
      show a count of -1 here.
- ADDRESS
- The kernel address at which the module's text segment is loaded. Builtin
      modules will show 0 here. This field is only displayed if the
      -koption is specified.
- REQUIRES
- Additional modules that must be present.
Themodstat utility exits with a status of 0 on success
  and with a nonzero status if an error occurs.
A modstat utility appeared in NetBSD
  0.9. The modstat command was designed to be
  similar in functionality to the corresponding command in SunOS 4.1.3.
  modstat was switched to the module framework for
  NetBSD 5.0.
The original NetBSD implementation was written by
  Terrence R. Lambert
  <terry@cs.weber.edu>.
  The switch to the module framework was by Andrew Doran
  <ad@NetBSD.org>.