slurm_hostlist_create(3)

1Slurm API(3)               Slurm host list functions              Slurm API(3)
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NAME

6       slurm_hostlist_create,  slurm_hostlist_shift,  slurm_hostlist_destroy -
7       Slurm host list support functions
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SYNTAX

11       #include <slurm/slurm.h>
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13       hostlist_t slurm_hostlist_create (
14            char *node_list
15       );
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17       char * slurm_hostlist_shift (
18            hostlist_t host_list
19       );
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21       void slurm_hostlist_destroy (
22            hostlist_t host_list
23       );
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ARGUMENTS

27       node_list
28              A list of nodes as returned by the  slurm_job_step_create  func‐
29              tions.  The  returned value may include a simple range format to
30              describe numeric ranges of values and/or multiple numeric values
31              (e.g.  "linux[1-3,6]"  represents  "linux1", "linux2", "linux3",
32              and "linux6").
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34       host_list
35              A hostlist created by the slurm_hostlist_create function.
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DESCRIPTION

39       slurm_hostlist_create creates a database of node  names  from  a  range
40       format  describing  node  names.  Use slurm_hostlist_destroy to release
41       storage associated with the database when no longer required.
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43       slurm_hostlist_shift extracts the first entry from the host list  data‐
44       base created by the slurm_hostlist_create function.
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46       slurm_hostlist_destroy releases storage associated with a database cre‐
47       ated by slurm_hostlist_create when no longer required.
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RETURN VALUE

51       slurm_hostlist_create returns the host list database or NULL if  memory
52       can not be allocated for the database.
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55       slurm_hostlist_shift  returns  a character string or NULL if no entries
56       remain in the database.
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EXAMPLE

60       #include <stdio.h>
61       #include <hostlist.h>
62       #include <slurm.h>
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64       int main (int argc, char *argv[])
65       {
66            hostlist_t my_hostlist;
67            char *hostnames, *host;
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69            /* generate a list of hostnames, possibly using a */
70            /*    slurm job step creation function */
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72            my_hostlist = slurm_hostlist_create (hostnames);
73            if (my_hostlist == NULL) {
74                 fprintf (stderr, "No memory\n");
75                 exit (1);
76            }
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78            while ( (host = slurm_hostlist_shift(my_hostlist)) ) {
79                 printf ("host = %s\n", host);
80                 free(host);
81            }
82
83            slurm_hostlist_destroy (my_hostlist) ;
84            exit (0);
85       }
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NOTE

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

94       Copyright  (C)  2002-2006  The Regents of the University of California.
95       Produced at Lawrence Livermore National  Laboratory  (cf,  DISCLAIMER).
96       CODE-OCEC-09-009. All rights reserved.
97
98       This  file  is  part  of  Slurm,  a  resource  management program.  For
99       details, see <https://slurm.schedmd.com/>.
100
101       Slurm is free software; you can redistribute it and/or modify it  under
102       the  terms  of  the GNU General Public License as published by the Free
103       Software Foundation; either version 2  of  the  License,  or  (at  your
104       option) any later version.
105
106       Slurm  is  distributed  in the hope that it will be useful, but WITHOUT
107       ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY  or
108       FITNESS  FOR  A PARTICULAR PURPOSE.  See the GNU General Public License
109       for more details.
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