cfg_query(9r)															     cfg_query(9r)

NAME

       cfg_query - General: Determines the values of selected subsystem attributes

SYNOPSIS

       #include <sys/sysconfig.h> ); cfg_status_t cfg_query(
	       char *subsys,
	       cfg_attr_t *attributes,
	       uint nattributes );

ARGUMENTS

       Specifies  the  name  of  the  subsystem  to  be queried.  Contains information, such as attribute name, about the list of attributes being
       queried. The array must have (nattributes + 1) cfg_attr_t structures with the attribute name of the last one being set to  a  null  string.
       Specifies the number of attributes in the attributes argument being queried.

DESCRIPTION

       The cfg_query( ) routine obtains information about a list of subsystem attributes. You can obtain information about one or more attributes.
       When your application calls the cfg_query( ) routine, it passes the subsystem name and a list of attribute names to the system. The  system
       reads  this  information, determines the validity of the information about the named attributes, and returns the attribute value and a suc-
       cess status or an error status.

       When your application calls the cfg_query( ) routine, it passes a list of attribute names. The application passes this  information  in	an
       array of structures of type cfg_attr_t. For information about this structure, see the cfg_subsys_query(3) reference page.

RETURN VALUES

       This  routine  returns  32-bit status values composed of subsystem status and framework status segments. The upper 16 bits is the subsystem
       status (CFG_STATUS_SUBSYS) and the lower 16 bits is the frame status (CFG_STATUS_FRAME). The return values are organized as follows:

       [Upper subsystem 16 bits][Lower framework 16 bits]

       The subsystem status is returned by the subsystem's configure routine and can be any error in errno.h. The framework status is returned	by
       the  configuration  framework;  the possible values are defined in <sys/sysconfig.h> as CFG_FRAME_Exxx. A successful operation has ESUCCESS(0) returned in both status segments.

       See the cfg_errno(9r) and errno(2) reference pages for more details about error numbers and status.

EXAMPLE

       A subsystem may be queried using the cfg_query routine as follows:

	      cfg_attr_t	      attributes[2];
	      cfg_status_t	      retval;
	      int		      i;
	      int		      nattributes;

	      /*****************************************************/
	      /*  Initialize attribute names for the request	   */

	      strcpy (attributes[0].name, "maxmounts");
	      attributes[0].type = CFG_ATTR_INTTYPE;
	      attributes[0].attr.num.val = 30;
	      nattributes = 1;
	      attributes[1].name[0] = '';

	      /***************************************************/
	      /*   Call the cfg_query() routine        */

	      retval = cfg_query("lvm", attributes, nattributes);

	      if (retval != CFG_SUCCESS)
		  print_error (retval);

	      else {

		   for (i=0; i<1; i++) {
		      if (attributes[i].status != CFG_ATTR_SUCCESS) {
			  printf("%s:", attributes[i].name);
			  switch (attributes[i].status){
			   case CFG_ATTR_EEXISTS:
			     printf("unknown attribute
");
			     break;
			   case CFG_ATTR_EOP:
			     printf("attribute does not allow this operation
");
			     break;
	      .
	      .
	      .
			   default:
			     printf("unknown error
");
			     break;
			 }
		     }
		  }
	      }

       For extracting attribute values of error status, refer to /usr/examples/cfgmgr/sample_app.c.

SEE ALSO

       Routines: cfg_subsys_query(3), cfg_configure(9r), cfg_errno(9r), cfg_reconfigure(9r), cfg_subsysop(9r), cfg_unconfigure(9r)

       Other: errno(2),

																     cfg_query(9r)