__bitmap_parselist(9) [centos man page]

__BITMAP_PARSELIST(9)					  Basic Kernel Library Functions				     __BITMAP_PARSELIST(9)

NAME

       __bitmap_parselist - convert list format ASCII string to bitmap

SYNOPSIS

       int __bitmap_parselist(const char * buf, unsigned int buflen, int is_user, unsigned long * maskp, int nmaskbits);

ARGUMENTS

       buf
	   read nul-terminated user string from this buffer

       buflen
	   buffer size in bytes. If string is smaller than this then it must be terminated with a .

       is_user
	   location of buffer, 0 indicates kernel space

       maskp
	   write resulting mask here

       nmaskbits
	   number of bits in mask to be written

DESCRIPTION

       Input format is a comma-separated list of decimal numbers and ranges. Consecutively set bits are shown as two hyphen-separated decimal
       numbers, the smallest and largest bit numbers set in the range.

       Returns 0 on success, -errno on invalid input strings.

ERROR VALUES

       -EINVAL: second number in range smaller than first -EINVAL: invalid character in string -ERANGE: bit number specified too large for mask

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						     __BITMAP_PARSELIST(9)

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 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
       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)