GENDERS_TESTQUERY(3)						    LIBGENDERS						      GENDERS_TESTQUERY(3)

NAME

       genders_testquery - query genders database for a set of nodes

SYNOPSIS

       #include <genders.h>

       int genders_testquery(genders_t handle, const char *node, const char *query);

DESCRIPTION

       genders_testquery() tests if the node pointed to by node meets the conditions specified in the query.  If node is NULL, the current node is
       tested.	Queries are based on the union, intersection, difference, or complement of genders attributes and values.  The query is passed	as
       a  string  through  the	query parameter.  The set operation union is represented by two pipe symbols ('||'), intersection by two ampersand
       symbols ('&&'), difference by two minus symbols ('--'), and complement by a tilde ('~').  Set  operations  are  performed  left	to  right.
       Parentheses  may  be  used to change the order of operations.  A list of query examples are listed below.  A NULL query retrieves all nodes
       from the genders database.

EXAMPLES

       The following are example queries that can be passed to genders_testquery().

       Test if a node contains the mgmt or login attribute:
	       "mgmt||login"

       Test if a node is not a login node:
	       "all--login"

       Test if a node is both a login node and ntp server:
	       "login&&ntpserv"

       Test if a node is not a mgmt or login node:
	       "~(mgmt||login)"

RETURN VALUES

       If the node as met the conditions of the query, 1 is returned.  0 is returned if the node does not meet the conditions of  the  query.	On
       error,  -1 is returned, and an error code is returned in handle.  The error code can be retrieved via genders_errnum(3) , and a description
       of the error code can be retrieved via genders_strerror(3).  Error codes are defined in genders.h.

ERRORS

       GENDERS_ERR_NULLHANDLE
	      The handle parameter is NULL.  The genders handle must be created with genders_handle_create(3).

       GENDERS_ERR_NOTLOADED
	      genders_load_data(3) has not been called to load genders data.

       GENDERS_ERR_PARAMETERS
	      An incorrect parameter has been passed in.

       GENDERS_ERR_SYNTAX
	      There is a syntax error in the query.

       GENDERS_ERR_OUTMEM
	      malloc(3) has failed internally, system is out of memory.

       GENDERS_ERR_MAGIC
	      handle has an incorrect magic number.  handle does not point to a genders handle	or  handle  has  been  destroyed  by  genders_han-
	      dle_destroy(3).

       GENDERS_ERR_INTERNAL
	      An internal system error has occurred.

FILES

       /usr/include/genders.h

SEE ALSO

       libgenders(3), genders_handle_create(3), genders_load_data(3), genders_errnum(3), genders_strerror(3)

LLNL
								     June 2004						      GENDERS_TESTQUERY(3)