QUERY_MODULE (2)
query the kernel for various bits pertaining to modules.
SYNOPSIS
#include <linux/module.h>
int query_module(const char *name, int which,
void *buf, size_t bufsize, size_t *ret);
DESCRIPTION
query_module
requests information related to loadable modules from the kernel. The
precise nature of the information and its format depends on the which
subfunction. Some functions require name to name a currently
loaded module, some allow name to be NULL indicating the
kernel proper.
0
Always returns success. Used to probe for the system call.
QM_MODULES
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
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
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
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
Returns miscelaneous 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.
RETURN VALUE
On success, zero is returned. On error, -1 is returned and errno
is set appropriately.
ERRORS
ENOENT
No module by that name exists.
EINVAL
Invalid which, or name indicates the kernel for an
inappropriate subfunction.
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.
SEE ALSO
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