NAME

       slurm_hostlist_create,  slurm_hostlist_shift,  slurm_hostlist_destroy  -  Slurm  host list
       support functions

SYNTAX

       #include <slurm/slurm.h>

       hostlist_t slurm_hostlist_create (
            char *node_list
       );

       char * slurm_hostlist_shift (
            hostlist_t host_list
       );

       void slurm_hostlist_destroy (
            hostlist_t host_list
       );

ARGUMENTS

       node_list
              A list of nodes as returned by the slurm_job_step_create  functions.  The  returned
              value may include a simple range format to describe numeric ranges of values and/or
              multiple  numeric  values  (e.g.  "linux[1-3,6]"  represents  "linux1",   "linux2",
              "linux3", and "linux6").

       host_list
              A hostlist created by the slurm_hostlist_create function.

DESCRIPTION

       slurm_hostlist_create creates a database of node names from a range format describing node
       names. Use slurm_hostlist_destroy to release storage associated with the database when  no
       longer required.

       slurm_hostlist_shift  extracts  the first entry from the host list database created by the
       slurm_hostlist_create function.

       slurm_hostlist_destroy  releases  storage  associated   with   a   database   created   by
       slurm_hostlist_create when no longer required.

RETURN VALUE

       slurm_hostlist_create  returns  the  host  list  database  or  NULL  if  memory can not be
       allocated for the database.

       slurm_hostlist_shift returns a character string or  NULL  if  no  entries  remain  in  the
       database.

EXAMPLE

       #include <stdio.h>
       #include <hostlist.h>
       #include <slurm.h>

       int main (int argc, char *argv[])
       {
            hostlist_t my_hostlist;
            char *hostnames, *host;

            /* generate a list of hostnames, possibly using a */
            /*    slurm job step creation function */

            my_hostlist = slurm_hostlist_create (hostnames);
            if (my_hostlist == NULL) {
                 fprintf (stderr, "No memory\n");
                 exit (1);
            }

            while ( (host = slurm_hostlist_shift(my_hostlist)) )
                 printf ("host = %s\n", host);

            slurm_hostlist_destroy (my_hostlist) ;
            exit (0);
       }

NOTE

       These functions are included in the libslurm library, which must be linked to your process
       for use (e.g. "cc -lslurm myprog.c").

COPYING

       Copyright (C) 2002-2006 The Regents of the University of California.  Produced at Lawrence
       Livermore National Laboratory (cf, DISCLAIMER).  CODE-OCEC-09-009. All rights reserved.

       This   file   is  part  of  SLURM,  a  resource  management  program.   For  details,  see
       <http://slurm.schedmd.com/>.

       SLURM is free software; you can redistribute it and/or modify it under the  terms  of  the
       GNU  General Public License as published by the Free Software Foundation; either version 2
       of the License, or (at your option) any later version.

       SLURM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
       even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
       GNU General Public License for more details.

SEE ALSO

       slurm_get_job_steps(3), slurm_load_jobs(3), slurm_load_partitions(3)