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 related to loadable modules from the
kernel. The precise nature of the information and its format depends
on the which sub function. Some functions require name to name a currently
loaded module, some allow name to be NULL indicating the kernel
proper.
VALUES OF WHICH [Toc] [Back]
0 Always returns success. Used to probe for the system call.
QM_MODULES [Toc] [Back]
Returns the names of all loaded modules. The output buffer format
is adjacent null-terminated strings; ret is set to the number
of modules.
QM_DEPS [Toc] [Back]
Returns the names of all modules used by the indicated module.
The output buffer format is adjacent null-terminated strings;
ret is set to the number of modules.
QM_REFS [Toc] [Back]
Returns the names of all modules using the indicated module.
This is the inverse of QM_DEPS. The output buffer format is
adjacent null-terminated strings; ret is set to the number of
modules.
QM_SYMBOLS [Toc] [Back]
Returns the symbols and values exported by the kernel or the
indicated module. The buffer format is an array of:
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_INFO [Toc] [Back]
Returns 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, et al that indicates the current
status of the module. ret is set to the size of the module_info
struct.
On success, zero is returned. On error, -1 is returned and errno is
set appropriately.
ENOENT No module by that name exists.
EINVAL Invalid which, or name indicates the kernel for an inappropriate
sub function.
ENOSPC The buffer size provided was too small. ret is set to the minimum
size needed.
EFAULT At least one of name, buf, or ret was outside the program's
accessible address space.
create_module(2), init_module(2), delete_module(2).
Linux 2.1.17 26 Dec 1996 QUERY_MODULE(2)
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