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/*
* Linux Swap Device Cluster
*
* Copyright (c) 2014 Red Hat.
* Copyright (c) 2000,2004 Silicon Graphics, Inc. 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 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.
*/
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include "indom.h"
#include "swapdev.h"
int
refresh_swapdev(pmInDom swapdev_indom)
{
char buf[MAXPATHLEN];
swapdev_t *swap;
FILE *fp;
char *path;
char *size;
char *used;
char *priority;
int sts;
pmdaCacheOp(swapdev_indom, PMDA_CACHE_INACTIVE);
if ((fp = linux_statsfile("/proc/swaps", buf, sizeof(buf))) == NULL)
return -oserror();
while (fgets(buf, sizeof(buf), fp) != NULL) {
if (buf[0] != '/')
continue;
if ((path = strtok(buf, " \t")) == 0)
continue;
if ((/*type: */ strtok(NULL, " \t")) == NULL ||
(size = strtok(NULL, " \t")) == NULL ||
(used = strtok(NULL, " \t")) == NULL ||
(priority = strtok(NULL, " \t")) == NULL)
continue;
sts = pmdaCacheLookupName(swapdev_indom, path, NULL, (void **)&swap);
if (sts == PMDA_CACHE_ACTIVE) /* repeated line in /proc/swaps? */
continue;
if (sts == PMDA_CACHE_INACTIVE) { /* re-activate an old swap device */
pmdaCacheStore(swapdev_indom, PMDA_CACHE_ADD, path, swap);
}
else { /* new swap device */
if ((swap = malloc(sizeof(swapdev_t))) == NULL)
continue;
#if PCP_DEBUG
if (pmDebug & DBG_TRACE_LIBPMDA)
fprintf(stderr, "refresh_swapdev: add \"%s\"\n", path);
#endif
pmdaCacheStore(swapdev_indom, PMDA_CACHE_ADD, path, swap);
}
sscanf(size, "%u", &swap->size);
sscanf(used, "%u", &swap->used);
sscanf(priority, "%d", &swap->priority);
}
fclose(fp);
return 0;
}
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