145 lines
3.8 KiB
C
145 lines
3.8 KiB
C
/***************************************************************************
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* Copyright (C) 06/2006 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <mntent.h>
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#include <sys/vfs.h>
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#include "logging.h"
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#include "plugins.h"
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#include "probe.h"
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#define MAXFSNAME 16
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struct sammler_plugin plugin;
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static const char *ds_def = {
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"DS:block_total:GAUGE:15:0:U "
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"DS:block_free:GAUGE:15:0:U "
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};
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static const char * get_ds(int ds_id)
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{
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return ds_def;
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}
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static char * get_valid_fs(int *xcnt)
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{
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FILE *fp = fopen("/proc/filesystems", "r");
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if (fp == NULL)
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return NULL;
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int cnt = 0;
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char buffer[64];
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while (fgets(buffer, sizeof(buffer), fp) != NULL) {
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if (!strncmp(buffer, "nodev", 5))
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continue;
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cnt++;
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}
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char *valid_arr = malloc(cnt * MAXFSNAME);
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if (valid_arr == NULL)
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return NULL;
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rewind(fp);
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int i = 0;
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while (fgets(buffer, sizeof(buffer), fp) != NULL) {
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if (!strncmp(buffer, "nodev", 5))
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continue;
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char *end = memccpy(valid_arr + (i++ * MAXFSNAME), buffer +1, '\n', MAXFSNAME);
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*(end -1) = '\0';
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}
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fclose(fp);
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*xcnt = cnt;
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return valid_arr;
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}
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static int probe(void)
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{
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FILE *fp = setmntent("/etc/mtab", "r");
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if (fp == NULL) {
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log_print(LOG_WARN, "plugin mount");
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return -1;
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}
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int cnt;
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char *valid_arr = get_valid_fs(&cnt);
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if (valid_arr == NULL) {
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log_print(LOG_WARN, "plugin mount");
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endmntent(fp);
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return -1;
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}
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struct mntent *mnt;
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while ((mnt = getmntent(fp)) != NULL) {
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int i, valid = 0;
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for (i = 0; i < cnt; i++)
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if (strncmp(mnt->mnt_type, valid_arr + (i * MAXFSNAME), MAXFSNAME) == 0)
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valid = 1;
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if (valid == 0)
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continue;
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struct statfs fs;
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if (statfs(mnt->mnt_dir, &fs) == -1) {
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log_print(LOG_WARN, "plugin mount: statfs(%s)", mnt->mnt_dir);
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continue;
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}
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if (fs.f_blocks == 0)
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continue;
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char *slash = mnt->mnt_fsname;
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while (slash && (slash = strchr(slash, '/'))) {
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slash = strchr(slash, '/');
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*slash++ = '_';
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}
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char filename[64];
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int len = snprintf(filename, sizeof(filename), "mount%s.rrd", mnt->mnt_fsname);
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if (len < 0 || len >= sizeof(filename)) {
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log_print(LOG_WARN, "plugin mount: file name too long", mnt->mnt_fsname);
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continue;
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}
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probe_submit(&plugin, filename, 0, "%lu:%lu",
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fs.f_blocks * (fs.f_bsize /1024),
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fs.f_bfree * (fs.f_bsize /1024));
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}
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free(valid_arr);
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endmntent(fp);
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return 0;
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}
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struct sammler_plugin plugin = {
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.name = "mount",
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.interval = 10,
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.probe = &probe,
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.get_ds = &get_ds,
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};
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