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pkg-monitoring-plugins/plugins/check_swap.c

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/*****************************************************************************
*
* Nagios check_disk plugin
*
* License: GPL
* Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
* Copyright (c) 2000-2007 Nagios Plugins Development Team
*
* Last Modified: $Date: 2008-05-07 11:02:42 +0100 (Wed, 07 May 2008) $
*
* Description:
*
* This file contains the check_disk plugin
*
*
* 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* $Id: check_swap.c 1991 2008-05-07 10:02:42Z dermoth $
*
*****************************************************************************/
const char *progname = "check_swap";
const char *revision = "$Revision: 1991 $";
const char *copyright = "2000-2007";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
#include "popen.h"
#include "utils.h"
#ifdef HAVE_DECL_SWAPCTL
# ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
# endif
# ifdef HAVE_SYS_SWAP_H
# include <sys/swap.h>
# endif
# ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
# endif
#endif
#ifndef SWAP_CONVERSION
# define SWAP_CONVERSION 1
#endif
int check_swap (int usp, float free_swap_mb);
int process_arguments (int argc, char **argv);
int validate_arguments (void);
void print_usage (void);
void print_help (void);
int warn_percent = 0;
int crit_percent = 0;
float warn_size_bytes = 0;
float crit_size_bytes= 0;
int verbose;
int allswaps;
int
main (int argc, char **argv)
{
int percent_used, percent;
float total_swap_mb = 0, used_swap_mb = 0, free_swap_mb = 0;
float dsktotal_mb = 0, dskused_mb = 0, dskfree_mb = 0, tmp_mb = 0;
int result = STATE_UNKNOWN;
char input_buffer[MAX_INPUT_BUFFER];
#ifdef HAVE_PROC_MEMINFO
FILE *fp;
#else
int conv_factor = SWAP_CONVERSION;
# ifdef HAVE_SWAP
char *temp_buffer;
char *swap_command;
char *swap_format;
# else
# ifdef HAVE_DECL_SWAPCTL
int i=0, nswaps=0, swapctl_res=0;
# ifdef CHECK_SWAP_SWAPCTL_SVR4
swaptbl_t *tbl=NULL;
swapent_t *ent=NULL;
# else
# ifdef CHECK_SWAP_SWAPCTL_BSD
struct swapent *ent;
# endif /* CHECK_SWAP_SWAPCTL_BSD */
# endif /* CHECK_SWAP_SWAPCTL_SVR4 */
# endif /* HAVE_DECL_SWAPCTL */
# endif
#endif
char str[32];
char *status;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
status = strdup ("");
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
#ifdef HAVE_PROC_MEMINFO
if (verbose >= 3) {
printf("Reading PROC_MEMINFO at %s\n", PROC_MEMINFO);
}
fp = fopen (PROC_MEMINFO, "r");
while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%*[:] %f %f %f", &dsktotal_mb, &dskused_mb, &dskfree_mb) == 3) {
dsktotal_mb = dsktotal_mb / 1048576; /* Apply conversion */
dskused_mb = dskused_mb / 1048576;
dskfree_mb = dskfree_mb / 1048576;
total_swap_mb += dsktotal_mb;
used_swap_mb += dskused_mb;
free_swap_mb += dskfree_mb;
if (allswaps) {
if (dsktotal_mb == 0)
percent=100.0;
else
percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb));
result = max_state (result, check_swap (percent, dskfree_mb));
if (verbose)
asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree_mb, 100 - percent);
}
}
else if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%[TotalFre]%*[:] %f %*[k]%*[B]", str, &tmp_mb)) {
if (verbose >= 3) {
printf("Got %s with %f\n", str, tmp_mb);
}
/* I think this part is always in Kb, so convert to mb */
if (strcmp ("Total", str) == 0) {
dsktotal_mb = tmp_mb / 1024;
}
else if (strcmp ("Free", str) == 0) {
dskfree_mb = tmp_mb / 1024;
}
}
}
fclose(fp);
dskused_mb = dsktotal_mb - dskfree_mb;
total_swap_mb = dsktotal_mb;
used_swap_mb = dskused_mb;
free_swap_mb = dskfree_mb;
#else
# ifdef HAVE_SWAP
asprintf(&swap_command, "%s", SWAP_COMMAND);
asprintf(&swap_format, "%s", SWAP_FORMAT);
/* These override the command used if a summary (and thus ! allswaps) is required */
/* The summary flag returns more accurate information about swap usage on these OSes */
# ifdef _AIX
if (!allswaps) {
asprintf(&swap_command, "%s", "/usr/sbin/lsps -s");
asprintf(&swap_format, "%s", "%f%*s %f");
conv_factor = 1;
}
# endif
if (verbose >= 2)
printf (_("Command: %s\n"), swap_command);
if (verbose >= 3)
printf (_("Format: %s\n"), swap_format);
child_process = spopen (swap_command);
if (child_process == NULL) {
printf (_("Could not open pipe: %s\n"), swap_command);
return STATE_UNKNOWN;
}
child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
if (child_stderr == NULL)
printf (_("Could not open stderr for %s\n"), swap_command);
sprintf (str, "%s", "");
/* read 1st line */
fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
if (strcmp (swap_format, "") == 0) {
temp_buffer = strtok (input_buffer, " \n");
while (temp_buffer) {
if (strstr (temp_buffer, "blocks"))
sprintf (str, "%s %s", str, "%f");
else if (strstr (temp_buffer, "dskfree"))
sprintf (str, "%s %s", str, "%f");
else
sprintf (str, "%s %s", str, "%*s");
temp_buffer = strtok (NULL, " \n");
}
}
/* If different swap command is used for summary switch, need to read format differently */
# ifdef _AIX
if (!allswaps) {
fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process); /* Ignore first line */
sscanf (input_buffer, swap_format, &total_swap_mb, &used_swap_mb);
free_swap_mb = total_swap_mb * (100 - used_swap_mb) /100;
used_swap_mb = total_swap_mb - free_swap_mb;
if (verbose >= 3)
printf (_("total=%.0f, used=%.0f, free=%.0f\n"), total_swap_mb, used_swap_mb, free_swap_mb);
} else {
# endif
while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
sscanf (input_buffer, swap_format, &dsktotal_mb, &dskfree_mb);
dsktotal_mb = dsktotal_mb / conv_factor;
/* AIX lists percent used, so this converts to dskfree in MBs */
# ifdef _AIX
dskfree_mb = dsktotal_mb * (100 - dskfree_mb) / 100;
# else
dskfree_mb = dskfree_mb / conv_factor;
# endif
if (verbose >= 3)
printf (_("total=%.0f, free=%.0f\n"), dsktotal_mb, dskfree_mb);
dskused_mb = dsktotal_mb - dskfree_mb;
total_swap_mb += dsktotal_mb;
used_swap_mb += dskused_mb;
free_swap_mb += dskfree_mb;
if (allswaps) {
percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb));
result = max_state (result, check_swap (percent, dskfree_mb));
if (verbose)
asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree_mb, 100 - percent);
}
}
# ifdef _AIX
}
# endif
/* If we get anything on STDERR, at least set warning */
while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
result = max_state (result, STATE_WARNING);
/* close stderr */
(void) fclose (child_stderr);
/* close the pipe */
if (spclose (child_process))
result = max_state (result, STATE_WARNING);
# else
# ifdef CHECK_SWAP_SWAPCTL_SVR4
/* get the number of active swap devices */
if((nswaps=swapctl(SC_GETNSWP, NULL))== -1)
die(STATE_UNKNOWN, _("Error getting swap devices\n") );
if(nswaps == 0)
die(STATE_OK, _("SWAP OK: No swap devices defined\n"));
if(verbose >= 3)
printf("Found %d swap device(s)\n", nswaps);
/* initialize swap table + entries */
tbl=(swaptbl_t*)malloc(sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps));
if(tbl==NULL)
die(STATE_UNKNOWN, _("malloc() failed!\n"));
memset(tbl, 0, sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps));
tbl->swt_n=nswaps;
for(i=0;i<nswaps;i++){
if((tbl->swt_ent[i].ste_path=(char*)malloc(sizeof(char)*MAXPATHLEN)) == NULL)
die(STATE_UNKNOWN, _("malloc() failed!\n"));
}
/* and now, tally 'em up */
swapctl_res=swapctl(SC_LIST, tbl);
if(swapctl_res < 0){
perror(_("swapctl failed: "));
die(STATE_UNKNOWN, _("Error in swapctl call\n"));
}
for(i=0;i<nswaps;i++){
dsktotal_mb = (float) tbl->swt_ent[i].ste_pages / SWAP_CONVERSION;
dskfree_mb = (float) tbl->swt_ent[i].ste_free / SWAP_CONVERSION;
dskused_mb = ( dsktotal_mb - dskfree_mb );
if (verbose >= 3)
printf ("dsktotal_mb=%.0f dskfree_mb=%.0f dskused_mb=%.0f\n", dsktotal_mb, dskfree_mb, dskused_mb);
if(allswaps && dsktotal_mb > 0){
percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb));
result = max_state (result, check_swap (percent, dskfree_mb));
if (verbose) {
asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree_mb, 100 - percent);
}
}
total_swap_mb += dsktotal_mb;
free_swap_mb += dskfree_mb;
used_swap_mb += dskused_mb;
}
/* and clean up after ourselves */
for(i=0;i<nswaps;i++){
free(tbl->swt_ent[i].ste_path);
}
free(tbl);
# else
# ifdef CHECK_SWAP_SWAPCTL_BSD
/* get the number of active swap devices */
nswaps=swapctl(SWAP_NSWAP, NULL, 0);
/* initialize swap table + entries */
ent=(struct swapent*)malloc(sizeof(struct swapent)*nswaps);
/* and now, tally 'em up */
swapctl_res=swapctl(SWAP_STATS, ent, nswaps);
if(swapctl_res < 0){
perror(_("swapctl failed: "));
die(STATE_UNKNOWN, _("Error in swapctl call\n"));
}
for(i=0;i<nswaps;i++){
dsktotal_mb = (float) ent[i].se_nblks / conv_factor;
dskused_mb = (float) ent[i].se_inuse / conv_factor;
dskfree_mb = ( dsktotal_mb - dskused_mb );
if(allswaps && dsktotal_mb > 0){
percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb));
result = max_state (result, check_swap (percent, dskfree_mb));
if (verbose) {
asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree_mb, 100 - percent);
}
}
total_swap_mb += dsktotal_mb;
free_swap_mb += dskfree_mb;
used_swap_mb += dskused_mb;
}
/* and clean up after ourselves */
free(ent);
# endif /* CHECK_SWAP_SWAPCTL_BSD */
# endif /* CHECK_SWAP_SWAPCTL_SVR4 */
# endif /* HAVE_SWAP */
#endif /* HAVE_PROC_MEMINFO */
/* if total_swap_mb == 0, let's not divide by 0 */
if(total_swap_mb) {
percent_used = 100 * ((double) used_swap_mb) / ((double) total_swap_mb);
} else {
percent_used = 0;
}
result = max_state (result, check_swap (percent_used, free_swap_mb));
printf (_("SWAP %s - %d%% free (%d MB out of %d MB) %s|"),
state_text (result),
(100 - percent_used), (int) free_swap_mb, (int) total_swap_mb, status);
puts (perfdata ("swap", (long) free_swap_mb, "MB",
TRUE, (long) max (warn_size_bytes/(1024 * 1024), warn_percent/100.0*total_swap_mb),
TRUE, (long) max (crit_size_bytes/(1024 * 1024), crit_percent/100.0*total_swap_mb),
TRUE, 0,
TRUE, (long) total_swap_mb));
return result;
}
int
check_swap (int usp, float free_swap_mb)
{
int result = STATE_UNKNOWN;
float free_swap = free_swap_mb * (1024 * 1024); /* Convert back to bytes as warn and crit specified in bytes */
if (usp >= 0 && crit_percent != 0 && usp >= (100.0 - crit_percent))
result = STATE_CRITICAL;
else if (crit_size_bytes > 0 && free_swap <= crit_size_bytes)
result = STATE_CRITICAL;
else if (usp >= 0 && warn_percent != 0 && usp >= (100.0 - warn_percent))
result = STATE_WARNING;
else if (warn_size_bytes > 0 && free_swap <= warn_size_bytes)
result = STATE_WARNING;
else if (usp >= 0.0)
result = STATE_OK;
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c = 0; /* option character */
int option = 0;
static struct option longopts[] = {
{"warning", required_argument, 0, 'w'},
{"critical", required_argument, 0, 'c'},
{"allswaps", no_argument, 0, 'a'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
if (argc < 2)
return ERROR;
while (1) {
c = getopt_long (argc, argv, "+?Vvhac:w:", longopts, &option);
if (c == -1 || c == EOF)
break;
switch (c) {
case 'w': /* warning size threshold */
if (is_intnonneg (optarg)) {
warn_size_bytes = (float) atoi (optarg);
break;
}
else if (strstr (optarg, ",") &&
strstr (optarg, "%") &&
sscanf (optarg, "%f,%d%%", &warn_size_bytes, &warn_percent) == 2) {
warn_size_bytes = floorf(warn_size_bytes);
break;
}
else if (strstr (optarg, "%") &&
sscanf (optarg, "%d%%", &warn_percent) == 1) {
break;
}
else {
usage4 (_("Warning threshold must be integer or percentage!"));
}
case 'c': /* critical size threshold */
if (is_intnonneg (optarg)) {
crit_size_bytes = (float) atoi (optarg);
break;
}
else if (strstr (optarg, ",") &&
strstr (optarg, "%") &&
sscanf (optarg, "%f,%d%%", &crit_size_bytes, &crit_percent) == 2) {
crit_size_bytes = floorf(crit_size_bytes);
break;
}
else if (strstr (optarg, "%") &&
sscanf (optarg, "%d%%", &crit_percent) == 1) {
break;
}
else {
usage4 (_("Critical threshold must be integer or percentage!"));
}
case 'a': /* all swap */
allswaps = TRUE;
break;
case 'v': /* verbose */
verbose++;
break;
case 'V': /* version */
print_revision (progname, revision);
exit (STATE_OK);
case 'h': /* help */
print_help ();
exit (STATE_OK);
case '?': /* error */
usage5 ();
}
}
c = optind;
if (c == argc)
return validate_arguments ();
if (warn_percent == 0 && is_intnonneg (argv[c]))
warn_percent = atoi (argv[c++]);
if (c == argc)
return validate_arguments ();
if (crit_percent == 0 && is_intnonneg (argv[c]))
crit_percent = atoi (argv[c++]);
if (c == argc)
return validate_arguments ();
if (warn_size_bytes == 0 && is_intnonneg (argv[c]))
warn_size_bytes = (float) atoi (argv[c++]);
if (c == argc)
return validate_arguments ();
if (crit_size_bytes == 0 && is_intnonneg (argv[c]))
crit_size_bytes = (float) atoi (argv[c++]);
return validate_arguments ();
}
int
validate_arguments (void)
{
if (warn_percent == 0 && crit_percent == 0 && warn_size_bytes == 0
&& crit_size_bytes == 0) {
return ERROR;
}
else if (warn_percent < crit_percent) {
usage4
(_("Warning percentage should be more than critical percentage"));
}
else if (warn_size_bytes < crit_size_bytes) {
usage4
(_("Warning free space should be more than critical free space"));
}
return OK;
}
void
print_help (void)
{
print_revision (progname, revision);
printf (_(COPYRIGHT), copyright, email);
printf ("%s\n", _("Check swap space on local machine."));
printf ("\n\n");
print_usage ();
printf (_(UT_HELP_VRSN));
printf (_(UT_EXTRA_OPTS));
printf (" %s\n", "-w, --warning=INTEGER");
printf (" %s\n", _("Exit with WARNING status if less than INTEGER bytes of swap space are free"));
printf (" %s\n", "-w, --warning=PERCENT%%");
printf (" %s\n", _("Exit with WARNING status if less than PERCENT of swap space is free"));
printf (" %s\n", "-c, --critical=INTEGER");
printf (" %s\n", _("Exit with CRITICAL status if less than INTEGER bytes of swap space are free"));
printf (" %s\n", "-c, --critical=PERCENT%%");
printf (" %s\n", _("Exit with CRITCAL status if less than PERCENT of swap space is free"));
printf (" %s\n", "-a, --allswaps");
printf (" %s\n", _("Conduct comparisons for all swap partitions, one by one"));
printf (_(UT_VERBOSE));
printf ("\n");
printf ("%s\n", _("Notes:"));
printf (" %s\n", _("On AIX, if -a is specified, uses lsps -a, otherwise uses lsps -s."));
#ifdef NP_EXTRA_OPTS
printf ("\n");
printf (_(UT_EXTRA_OPTS_NOTES));
#endif
printf (_(UT_SUPPORT));
}
void
print_usage (void)
{
printf (_("Usage:"));
printf ("%s [-av] -w <percent_free>%% -c <percent_free>%%\n",progname);
printf ("%s [-av] -w <bytes_free> -c <bytes_free>\n", progname);
}
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