NAME

       pvm_config - Returns information about the present virtual machine configuration.

SYNOPSIS

       C    int info = pvm_config( int *nhost, int *narch, struct pvmhostinfo **hostp )
            struct pvmhostinfo {
                 int  hi_tid;
                 char *hi_name;
                 char *hi_arch;
                 int  hi_speed;
            };

       Fortran   call pvmfconfig( nhost, narch, dtid, name, arch, speed, info )

PARAMETERS

       nhost   Integer returning the number of hosts (pvmds) in the virtual machine.

       narch   Integer returning the number of different data formats being used.

       hostp   Returns  pointer  to  an  array of structures which contain information about each
               host including its pvmd task ID, name, architecture, and relative speed.

       dtid    Integer returning pvmd task ID for host

       name    Character string returning name of host

       arch    Character string returning architecture name of host

       speed   Integer returning relative speed of host. Default value is 1000.

       info    Integer status code returned by the routine.  Values less than  zero  indicate  an
               error.

DESCRIPTION

       The  routine  pvm_config  returns  information  about  the  present  virtual  machine. The
       information returned is similar to that available from the console command conf.

       The C function returns information about the entire  virtual  machine  in  one  call.  The
       Fortran  function  returns  information about one host per call and cycles through all the
       hosts.  Thus, if pvmfconfig is called nhost times, the  entire  virtual  machine  will  be
       represented.

       Note  that  in  C  the  hostp array is allocated and owned by libpvm.  It is automatically
       freed or reused on the next call to pvm_config.

       Note that in Fortran the reported value of nhost and the  host configuration do not change
       until the function resets at the end of a complete cycle.  The user can reset pvmfconfig()
       at any time by calling it with nhost = -1.

       If pvm_config is successful, info will be 0.  If some error occurs then info will be < 0.

EXAMPLES

       C:
            struct pvmhostinfo *hostp;
            int i, nhost, narch;

            info = pvm_config( &nhost, &narch, &hostp );
            for (i = 0; i < nhost; i++)
                 printf("%s\n", hostp[i].hi_name);

       Fortran:
            Do i=1, NHOST
              CALL PVMFCONFIG( NHOST,NARCH,DTID(i),HOST(i),ARCH(i),SPEED(i),INFO )
            Enddo

ERRORS

       The following error condition can be returned by pvm_config

       PvmSysErr
              pvmd not responding.

SEE ALSO

       pvm_tasks(3PVM)

                                         31 August, 1994                             CONFIG(3PVM)