- NetBSD Manual Pages
MODSTAT(8) NetBSD System Manager's Manual MODSTAT(8)
Powered by man-cgi (2021-03-02).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
modstat -- display status of loaded kernel modules
modstat [-Aaek] [-n name | name]
The modstat utility displays the status of any kernel modules present in
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
-a Tells you whether or not modules can be autoloaded at the moment.
This option does not take into consideration the sysctl
-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
Display the status of only the module with this name. Please
note that -n is optional.
In addition to listing the currently loaded modules' name, the informa-
tion reported by modstat includes:
CLASS Module class, such as "vfs", "driver", "exec", "misc" or "sec-
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 mod-
ules 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 -k option is specified.
REQUIRES Additional modules that must be present.
The modstat utility exits with a status of 0 on success and with a
nonzero status if an error occurs.
module(7), sysctl(7), modload(8), modunload(8)
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
The original NetBSD implementation was written by Terrence R. Lambert
<email@example.com>. The switch to the module framework was by Andrew
NetBSD 9.99 February 22, 2020 NetBSD 9.99