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)