/*
     *   This is an example of using mrd_prevent_allow(3mrd) to
     *   prevent or allow media removal, where allowed.  For
     *   robot name on the command line, the desired version
     *   of the command will be used according lock value.
     *   name.
     *
     *   Usage:
     *
     *      mrd_prevent_allow lock-value robot [ robot... ]
     */
    #ifndef   lint
    static   char   SccsId[] = "@(#)mrd_prevent_allow.c   1.2 3/5/97" ;
    #endif

    #include <stdio.h>
    #include <stdlib.h>
    #include <mrd_common.h>
    #include <mrd_message.h>

    main(int argc, char *argv[])
    {
       int      rc ;      /* Counter */
       int      lock ;      /* Lock value */
       int      status ;   /* return status */
       char      *robot ;   /* Robot to open */
       robot_info_t   robot_info ;   /* Robot data */
       dev_status_t   dev_status ;   /* Device status */
       char      log_info[MRD_MAX_LOG_STRING+1] ;

       /*
        *   Check that there are enough arguments.
        */
       if( argc < 3 ) {
          printf("usage: %s lock-value robot [ robot... ]\n", argv[0]) ;
          exit(1) ;
       }
       else
          lock  = atoi(argv[1]) ;

       /*
        *   Initialize the channel field of the robot_info, so
        *   mrd_startup(3mrd) will actually open the robot.
        */
       robot_info.channel = BAD_CHANNEL ;

       for(rc = 2; rc < argc; rc++) {
          /*
           *   The robot for this command.
           */
          robot = argv[rc] ;

          status = mrd_startup(robot, &robot_info, log_info) ;

          if( status != MRD_STATUS_SUCCESS ) {
             printf("Startup failed on %s: %s.\n", robot,
                mrd_strstatus(status)) ;

             continue ;
          }

          printf("Lock value %d on %s.\n", lock, robot) ;

          status = mrd_prevent_allow(&robot_info, lock, &dev_status) ;

          if( status != MRD_STATUS_SUCCESS )
             printf("Prevent/Allow failed on %s: %s.\n", robot,
                mrd_strstatus(status)) ;

          (void)mrd_shutdown(&robot_info) ;
       }

       return 0 ;
    }