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RedHat 9 (Linux i386) - man page for query_module (redhat section 2)

QUERY_MODULE(2) 		       Linux Module Support			  QUERY_MODULE(2)

NAME
       query_module - 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 pre-
       cise 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 indi-
       cating the kernel proper.

   VALUES OF WHICH
       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 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.

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 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.

SEE ALSO
       create_module(2), init_module(2), delete_module(2).

Linux 2.1.17				   26 Dec 1996				  QUERY_MODULE(2)


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