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sysdep_LINUX.c
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sysdep_LINUX.c
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/*
* Copyright (C) 2011 Tildeslash Ltd. All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
*
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/**
* System dependent filesystem methods.
*
* @author Jan-Henrik Haukeland, <hauk@tildeslash.com>
* @author Martin Pala, <martinp@tildeslash.com>
*
* @file
*/
#include <config.h>
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#ifdef HAVE_SYS_STATVFS_H
# include <sys/statvfs.h>
#endif
#ifdef HAVE_MNTENT_H
#include <mntent.h>
#endif
#include "monitor.h"
#include "device_sysdep.h"
/**
* Linux special block device mountpoint method. Filesystem must be mounted.
* In the case of success, mountpoint is stored in filesystem information
* structure for later use.
*
* @param inf Information structure where resulting data will be stored
* @param blockdev Identifies block special device
* @return NULL in the case of failure otherwise mountpoint
*/
char *device_mountpoint_sysdep(Info_T inf, char *blockdev) {
struct mntent *mnt;
FILE *mntfd;
ASSERT(inf);
ASSERT(blockdev);
if ((mntfd = setmntent("/etc/mtab", "r")) == NULL) {
LogError("%s: Cannot open /etc/mtab file\n", prog);
return NULL;
}
while ((mnt = getmntent(mntfd)) != NULL) {
if (IS(blockdev, mnt->mnt_fsname)) {
endmntent(mntfd);
inf->priv.filesystem.mntpath = xstrdup(mnt->mnt_dir);
return inf->priv.filesystem.mntpath;
}
}
endmntent(mntfd);
LogError("Device %s not found in /etc/mtab\n", blockdev);
return NULL;
}
/**
* Linux filesystem usage statistics. In the case of success result is stored in
* given information structure.
*
* @param inf Information structure where resulting data will be stored
* @return TRUE if informations were succesfully read otherwise FALSE
*/
int filesystem_usage_sysdep(Info_T inf) {
struct statvfs usage;
ASSERT(inf);
if (statvfs(inf->priv.filesystem.mntpath, &usage) != 0) {
LogError("%s: Error getting usage statistics for filesystem '%s' -- %s\n", prog, inf->priv.filesystem.mntpath, STRERROR);
return FALSE;
}
inf->priv.filesystem.f_bsize = usage.f_bsize;
inf->priv.filesystem.f_blocks = usage.f_blocks;
inf->priv.filesystem.f_blocksfree = usage.f_bavail;
inf->priv.filesystem.f_blocksfreetotal = usage.f_bfree;
inf->priv.filesystem.f_files = usage.f_files;
inf->priv.filesystem.f_filesfree = usage.f_ffree;
inf->priv.filesystem.flags = usage.f_flag;
return TRUE;
}