Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** This program 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.

**

** This program 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.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

#include "zbxnix.h"

​

#include "zbxcommon.h"

#include "log.h"

​

/******************************************************************************

 *                                                                            *

 * Purpose: Create block of shared memory                                     *

 *                                                                            *

 * Parameters:  size - size                                                   *

 *                                                                            *

 * Return value: If the function succeeds, then return SHM ID                 *

 *               -1 on an error                                               *

 *                                                                            *

 ******************************************************************************/

int zbx_shm_create(size_t size)

{

    int shm_id;

​

    if (-1 == (shm_id = shmget(IPC_PRIVATE, size, IPC_CREAT | IPC_EXCL | 0600)))

    {

        zabbix_log(LOG_LEVEL_CRIT, "cannot allocate shared memory of size " ZBX_FS_SIZE_T ": %s",

                (zbx_fs_size_t)size, zbx_strerror(errno));

        return -1;

    }

​

    return shm_id;

}

​

/******************************************************************************

 *                                                                            *

 * Purpose: Destroy block of shared memory                                    *

 *                                                                            *

 * Parameters:  shmid - Shared memory identifier                              *

 *                                                                            *

 * Return value: If the function succeeds, then return 0                      *

 *               -1 on an error                                               *

 *                                                                            *

 ******************************************************************************/

int zbx_shm_destroy(int shmid)

{

    if (-1 == shmctl(shmid, IPC_RMID, 0))

    {

        zbx_error("cannot remove existing shared memory: %s", zbx_strerror(errno));