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_handle_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)