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 "zbxsysinfo.h"

#include "../sysinfo.h"

​

#include "inodes.h"

​

#include "zbxjson.h"

#include "zbxalgo.h"

​

static int  get_fs_size_stat(const char *fs, zbx_uint64_t *total, zbx_uint64_t *free,

        zbx_uint64_t *used, double *pfree, double *pused, char **error)

{

#ifdef HAVE_SYS_STATVFS_H

#   ifdef HAVE_SYS_STATVFS64

#       define ZBX_STATFS   statvfs64

#   else

#       define ZBX_STATFS   statvfs

#   endif

#   define ZBX_BSIZE    f_frsize

#else

#   define ZBX_STATFS   statfs

#   define ZBX_BSIZE    f_bsize

#endif

    struct ZBX_STATFS   s;

​

    if (0 != ZBX_STATFS(fs, &s))

    {

        *error = zbx_dsprintf(NULL, "Cannot obtain filesystem information: %s", zbx_strerror(errno));

        zabbix_log(LOG_LEVEL_DEBUG,"%s failed with error: %s",__func__, *error);

        return SYSINFO_RET_FAIL;

    }

​

    /* Available space could be negative (top bit set) if we hit disk space */

    /* reserved for non-privileged users. Treat it as 0.                    */

    if (0 != ZBX_IS_TOP_BIT_SET(s.f_bavail))

        s.f_bavail = 0;

​

    if (NULL != total)

        *total = (zbx_uint64_t)s.f_blocks * s.ZBX_BSIZE;

​

    if (NULL != free)

        *free = (zbx_uint64_t)s.f_bavail * s.ZBX_BSIZE;

​

    if (NULL != used)

        *used = (zbx_uint64_t)(s.f_blocks - s.f_bfree) * s.ZBX_BSIZE;

​

    if (NULL != pfree)

    {

        if (0 != s.f_blocks - s.f_bfree + s.f_bavail)

            *pfree = (double)(100.0 * s.f_bavail) / (s.f_blocks - s.f_bfree + s.f_bavail);

        else

            *pfree = 0;

    }

​

    if (NULL != pused)

    {

        if (0 != s.f_blocks - s.f_bfree + s.f_bavail)

            *pused = 100.0 - (double)(100.0 * s.f_bavail) / (s.f_blocks - s.f_bfree + s.f_bavail);

        else

            *pused = 0;

    }

​

    return SYSINFO_RET_OK;

#undef ZBX_BSIZE

#undef ZBX_STATFS

}

​

static int  vfs_fs_used(const char *fs, AGENT_RESULT *result)

{

    zbx_uint64_t    value;

    char        *error;

​

    if (SYSINFO_RET_OK != get_fs_size_stat(fs, NULL, NULL, &value, NULL, NULL, &error))

    {

        SET_MSG_RESULT(result, error);

        return SYSINFO_RET_FAIL;

    }

​