Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "zbxnix.h"

​

#include "zbxcommon.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));

        return -1;

    }

​

    return 0;

}