query_module — query the kernel for various bits pertaining to modules
#include <linux/module.h>
int
query_module( |
const char *name, |
| int which, | |
| void *buf, | |
| size_t bufsize, | |
size_t *ret); |
query_module() requests
information from the kernel about loadable modules. The
returned information is placed in the buffer pointed to by
buf. The caller must
specify the size of buf in bufsize. The precise nature and
format of the returned information depend on the operation
specified by which.
Some operations require name to identify a currently
loaded module, some allow name to be NULL, indicating the
kernel proper.
The following values can be specified for which:
0Returns success, if the kernel supports query_module(). Used to probe for
availability of the system call.
QM_MODULESReturns the names of all loaded modules. The
returned buffer consists of a sequence of
null-terminated strings; ret is set to the number
of modules.
QM_DEPSReturns the names of all modules used by the
indicated module. The returned buffer consists of a
sequence of null-terminated strings; ret is set to the number
of modules.
QM_REFSReturns the names of all modules using the indicated
module. This is the inverse of QM_DEPS. The returned buffer consists
of a sequence of null-terminated strings; ret is set to the number
of modules.
QM_SYMBOLSReturns the symbols and values exported by the kernel or the indicated module. The returned buffer is an array of structures of the following form
struct module_symbol { unsigned long value;unsigned long name;};
followed by null-terminated strings. The value of
name is the
character offset of the string relative to the start of
buf; ret is set to the number
of symbols.
QM_INFOReturns miscellaneous information about the indicated module. The output buffer format is:
struct module_info { unsigned long address;unsigned long size;unsigned long flags;};
where address is the kernel
address at which the module resides, size is the size of the
module in bytes, and flags is a mask of
MOD_RUNNING, MOD_AUTOCLEAN, etc. that indicates
the current status of the module (see the kernel source
file include/linux/module.h). ret is set to the size of
the module_info
structure.
At least one of name, buf, or ret was outside the
program's accessible address space.
Invalid which; or name is NULL (indicating
"the kernel"), but this is not permitted with the
specified value of which.
No module by that name exists.
The buffer size provided was too small. ret is set to the minimum
size needed.
query_module() is not
supported in this version of the kernel.
This system call is only present on Linux up until kernel
2.4; it was removed in Linux 2.6. Some of the information
that was available via query_module() can be obtained from
/proc/modules, /proc/kallsyms, and /sys/modules.
This page is part of release 3.33 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at http://man7.org/linux/man-pages/.
|
Copyright (C) 1996 Free Software Foundation, Inc. This file is distributed according to the GNU General Public License. See the file COPYING in the top level source directory for details. 2006-02-09, some reformatting by Luc Van Oostenryck; some reformatting and rewordings by mtk |