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Slurm API


slurm_load_reservations, slurm_free_reservation_info_msg, slurm_print_reservation_info, slurm_sprint_reservation_info, slurm_print_reservation_info_msg − Slurm reservation information reporting functions


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

int slurm_load_reservations (

time_t update_time,

reserve_info_msg_t **reservation_info_msg_pptr


void slurm_free_reservation_info_msg (

reserve_info_msg_t *reservation_info_msg_ptr


void slurm_print_reservation_info (

FILE *out_file,

reserve_info_t *reservation_ptr,

int one_liner


char * slurm_sprint_reservation_info (

reserve_info_t *reservation_ptr,

int one_liner


void slurm_print_reservation_info_msg (

FILE *out_file,

reserve_info_msg_t *reservation_info_msg_ptr,

int one_liner




Print one record per line if non−zero.


Specifies the file to print data to.


Specifies the double pointer to the structure to be created and filled with the time of the last reservation update, a record count, and detailed information about each reservation. Detailed reservation information is written to fixed sized records and includes: reservation name, time limits, access restrictions, etc. See slurm.h for full details on the data structure’s contents.


Specifies the pointer to the structure created by slurm_load_reservations.


For all of the following informational calls, if update_time is equal to or greater than the last time changes where made to that information, new information is not returned. Otherwise all the configuration. job, node, or reservation records are returned.


slurm_load_reservations Returns a reserve_info_msg_t that contains an update time, record count, and array of reservation_table records for all reservations.

slurm_free_reservation_info_msg Release the storage generated by the slurm_load_reservations function.

slurm_print_reservation_info Prints the contents of the data structure describing one of the reservation records from the data loaded by the slurm_load_reservations function.

slurm_sprint_reservation_info Prints the sames info as slurm_print_reservation_info, but prints to a string that must be freed by the caller, rather than printing to a file.

slurm_print_reservation_info_msg Prints the contents of the data structure describing all reservation records loaded by the slurm_load_reservations function.


On success, zero is returned. On error, −1 is returned, and Slurm error code is set appropriately.


SLURM_NO_CHANGE_IN_DATA Data has not changed since update_time.

SLURM_PROTOCOL_VERSION_ERROR Protocol version has changed, re−link your code.

SLURM_PROTOCOL_SOCKET_IMPL_TIMEOUT Timeout in communicating with Slurm controller.


#include <stdio.h>
#include <stdlib.h>
#include <slurm/slurm.h>
#include <slurm/slurm_errno.h>

int main (int argc, char *argv[])

int i;

reserve_info_msg_t *res_info_ptr = NULL;

reserve_info_t *res_ptr;

/* get and dump all reservation information */

if (slurm_load_reservations((time_t)NULL,

&res_info_ptr)) {

slurm_perror ("slurm_load_reservations error");

exit (1);


/* The easy way to print... */


res_info_ptr, 0);

/* A harder way.. */

for (i = 0; i < res_info_ptr−>record_count; i++) {

res_ptr = &res_info_ptr−>reservation_array[i];

slurm_print_reservation_info(stdout, res_ptr, 0);


/* The hardest way. */

printf("reservations updated at %lx, records=%d\n",



for (i = 0; i < res_info_ptr−>record_count; i++) {

printf ("reservationName=%s Nodes=%s\n",


res_info_ptr−>reservation_array[i].node_list );


slurm_free_reservation_info_msg (res_info_ptr);

return 0;



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

The slurm_hostlist_ functions can be used to convert Slurm node list expressions into a collection of individual node names.


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 <>.

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.


scontrol(1), sinfo(1), squeue(1), slurm_hostlist_create(3), slurm_hostlist_shift(3), slurm_hostlist_destroy(3), slurm_get_errno(3), slurm_load_node(3), slurm_perror(3), slurm_strerror(3)