522 lines
14 KiB
C
522 lines
14 KiB
C
/******************************************************************************
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*
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* Program: Swap space plugin for Nagios
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* License: GPL
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*
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* License Information:
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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 Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
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*
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* $Id: check_swap.c,v 1.52 2005/09/15 08:27:58 tonvoon Exp $
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*
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*****************************************************************************/
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const char *progname = "check_swap";
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const char *revision = "$Revision: 1.52 $";
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const char *copyright = "2000-2004";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
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#include "common.h"
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#include "popen.h"
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#include "utils.h"
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int check_swap (int usp, float free_swap);
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int process_arguments (int argc, char **argv);
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int validate_arguments (void);
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void print_usage (void);
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void print_help (void);
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int warn_percent = 0;
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int crit_percent = 0;
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double warn_size = 0;
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double crit_size = 0;
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int verbose;
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int allswaps;
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int
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main (int argc, char **argv)
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{
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int percent_used, percent;
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float total_swap = 0, used_swap = 0, free_swap = 0;
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float dsktotal = 0, dskused = 0, dskfree = 0, tmp = 0;
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int result = STATE_UNKNOWN;
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char input_buffer[MAX_INPUT_BUFFER];
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#ifdef HAVE_PROC_MEMINFO
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FILE *fp;
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#else
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int conv_factor = SWAP_CONVERSION;
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# ifdef HAVE_SWAP
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char *temp_buffer;
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char *swap_command;
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char *swap_format;
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# else
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# ifdef HAVE_DECL_SWAPCTL
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int i=0, nswaps=0, swapctl_res=0;
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# ifdef CHECK_SWAP_SWAPCTL_SVR4
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swaptbl_t *tbl=NULL;
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swapent_t *ent=NULL;
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# else
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# ifdef CHECK_SWAP_SWAPCTL_BSD
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struct swapent *ent;
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# endif /* CHECK_SWAP_SWAPCTL_BSD */
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# endif /* CHECK_SWAP_SWAPCTL_SVR4 */
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# endif /* HAVE_DECL_SWAPCTL */
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# endif
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#endif
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char str[32];
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char *status;
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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status = strdup ("");
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if (process_arguments (argc, argv) == ERROR)
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usage4 (_("Could not parse arguments"));
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#ifdef HAVE_PROC_MEMINFO
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fp = fopen (PROC_MEMINFO, "r");
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while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
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if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%*[:] %f %f %f", &dsktotal, &dskused, &dskfree) == 3) {
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dsktotal = dsktotal / 1048576;
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dskused = dskused / 1048576;
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dskfree = dskfree / 1048576;
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total_swap += dsktotal;
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used_swap += dskused;
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free_swap += dskfree;
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if (allswaps) {
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if (dsktotal == 0)
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percent=100.0;
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else
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percent = 100 * (((double) dskused) / ((double) dsktotal));
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result = max_state (result, check_swap (percent, dskfree));
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if (verbose)
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asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
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}
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}
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else if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%[TotalFre]%*[:] %f %*[k]%*[B]", str, &tmp)) {
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if (strcmp ("Total", str) == 0) {
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dsktotal = tmp / 1024;
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}
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else if (strcmp ("Free", str) == 0) {
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dskfree = tmp / 1024;
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}
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}
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}
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fclose(fp);
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dskused = dsktotal - dskfree;
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total_swap = dsktotal;
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used_swap = dskused;
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free_swap = dskfree;
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#else
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# ifdef HAVE_SWAP
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asprintf(&swap_command, "%s", SWAP_COMMAND);
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asprintf(&swap_format, "%s", SWAP_FORMAT);
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/* These override the command used if a summary (and thus ! allswaps) is required */
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/* The summary flag returns more accurate information about swap usage on these OSes */
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# ifdef _AIX
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if (!allswaps) {
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asprintf(&swap_command, "%s", "/usr/sbin/lsps -s");
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asprintf(&swap_format, "%s", "%f%*s %f");
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conv_factor = 1;
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}
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# endif
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if (verbose >= 2)
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printf (_("Command: %s\n"), swap_command);
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if (verbose >= 3)
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printf (_("Format: %s\n"), swap_format);
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child_process = spopen (swap_command);
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if (child_process == NULL) {
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printf (_("Could not open pipe: %s\n"), swap_command);
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return STATE_UNKNOWN;
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}
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child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
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if (child_stderr == NULL)
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printf (_("Could not open stderr for %s\n"), swap_command);
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sprintf (str, "%s", "");
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/* read 1st line */
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fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
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if (strcmp (swap_format, "") == 0) {
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temp_buffer = strtok (input_buffer, " \n");
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while (temp_buffer) {
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if (strstr (temp_buffer, "blocks"))
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sprintf (str, "%s %s", str, "%f");
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else if (strstr (temp_buffer, "dskfree"))
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sprintf (str, "%s %s", str, "%f");
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else
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sprintf (str, "%s %s", str, "%*s");
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temp_buffer = strtok (NULL, " \n");
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}
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}
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/* If different swap command is used for summary switch, need to read format differently */
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# ifdef _AIX
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if (!allswaps) {
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fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process); /* Ignore first line */
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sscanf (input_buffer, swap_format, &total_swap, &used_swap);
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free_swap = total_swap * (100 - used_swap) /100;
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used_swap = total_swap - free_swap;
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if (verbose >= 3)
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printf (_("total=%.0f, used=%.0f, free=%.0f\n"), total_swap, used_swap, free_swap);
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} else {
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# endif
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while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
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sscanf (input_buffer, swap_format, &dsktotal, &dskfree);
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dsktotal = dsktotal / conv_factor;
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/* AIX lists percent used, so this converts to dskfree in MBs */
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# ifdef _AIX
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dskfree = dsktotal * (100 - dskfree) / 100;
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# else
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dskfree = dskfree / conv_factor;
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# endif
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if (verbose >= 3)
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printf (_("total=%.0f, free=%.0f\n"), dsktotal, dskfree);
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dskused = dsktotal - dskfree;
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total_swap += dsktotal;
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used_swap += dskused;
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free_swap += dskfree;
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if (allswaps) {
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percent = 100 * (((double) dskused) / ((double) dsktotal));
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result = max_state (result, check_swap (percent, dskfree));
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if (verbose)
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asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
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}
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}
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# ifdef _AIX
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}
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# endif
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/* If we get anything on STDERR, at least set warning */
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while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
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result = max_state (result, STATE_WARNING);
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/* close stderr */
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(void) fclose (child_stderr);
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/* close the pipe */
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if (spclose (child_process))
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result = max_state (result, STATE_WARNING);
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# else
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# ifdef CHECK_SWAP_SWAPCTL_SVR4
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/* get the number of active swap devices */
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nswaps=swapctl(SC_GETNSWP, NULL);
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/* initialize swap table + entries */
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tbl=(swaptbl_t*)malloc(sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps));
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memset(tbl, 0, sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps));
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tbl->swt_n=nswaps;
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for(i=0;i<nswaps;i++){
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ent=&tbl->swt_ent[i];
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ent->ste_path=(char*)malloc(sizeof(char)*MAXPATHLEN);
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}
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/* and now, tally 'em up */
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swapctl_res=swapctl(SC_LIST, tbl);
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if(swapctl_res < 0){
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perror(_("swapctl failed: "));
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result = STATE_WARNING;
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}
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for(i=0;i<nswaps;i++){
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dsktotal = (float) tbl->swt_ent[i].ste_pages / SWAP_CONVERSION;
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dskfree = (float) tbl->swt_ent[i].ste_free / SWAP_CONVERSION;
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dskused = ( dsktotal - dskfree );
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if (verbose >= 3)
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printf ("dsktotal=%.0f dskfree=%.0f dskused=%.0f\n", dsktotal, dskfree, dskused);
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if(allswaps && dsktotal > 0){
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percent = 100 * (((double) dskused) / ((double) dsktotal));
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result = max_state (result, check_swap (percent, dskfree));
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if (verbose) {
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asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
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}
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}
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total_swap += dsktotal;
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free_swap += dskfree;
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used_swap += dskused;
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}
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/* and clean up after ourselves */
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for(i=0;i<nswaps;i++){
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free(tbl->swt_ent[i].ste_path);
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}
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free(tbl);
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# else
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# ifdef CHECK_SWAP_SWAPCTL_BSD
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/* get the number of active swap devices */
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nswaps=swapctl(SWAP_NSWAP, NULL, 0);
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/* initialize swap table + entries */
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ent=(struct swapent*)malloc(sizeof(struct swapent)*nswaps);
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/* and now, tally 'em up */
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swapctl_res=swapctl(SWAP_STATS, ent, nswaps);
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if(swapctl_res < 0){
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perror(_("swapctl failed: "));
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result = STATE_WARNING;
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}
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for(i=0;i<nswaps;i++){
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dsktotal = (float) ent->se_nblks / conv_factor;
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dskused = (float) ent->se_inuse / conv_factor;
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dskfree = ( dsktotal - dskused );
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if(allswaps && dsktotal > 0){
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percent = 100 * (((double) dskused) / ((double) dsktotal));
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result = max_state (result, check_swap (percent, dskfree));
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if (verbose) {
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asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
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}
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}
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total_swap += dsktotal;
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free_swap += dskfree;
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used_swap += dskused;
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}
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/* and clean up after ourselves */
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free(ent);
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# endif /* CHECK_SWAP_SWAPCTL_BSD */
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# endif /* CHECK_SWAP_SWAPCTL_SVR4 */
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# endif /* HAVE_SWAP */
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#endif /* HAVE_PROC_MEMINFO */
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/* if total_swap == 0, let's not divide by 0 */
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if(total_swap) {
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percent_used = 100 * ((double) used_swap) / ((double) total_swap);
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} else {
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percent_used = 0;
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}
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result = max_state (result, check_swap (percent_used, free_swap));
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printf (_("SWAP %s - %d%% free (%.0f MB out of %.0f MB) %s|"),
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state_text (result),
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(100 - percent_used), free_swap, total_swap, status);
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puts (perfdata ("swap", (long) free_swap, "MB",
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TRUE, (long) max (warn_size/1024, warn_percent/100.0*total_swap),
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TRUE, (long) max (crit_size/1024, crit_percent/100.0*total_swap),
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TRUE, 0,
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TRUE, (long) total_swap));
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return result;
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}
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int
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check_swap (int usp, float free_swap)
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{
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int result = STATE_UNKNOWN;
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free_swap = free_swap * 1024; /* Convert back to bytes as warn and crit specified in bytes */
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if (usp >= 0 && crit_percent != 0 && usp >= (100.0 - crit_percent))
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result = STATE_CRITICAL;
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else if (crit_size > 0 && free_swap <= crit_size)
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result = STATE_CRITICAL;
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else if (usp >= 0 && warn_percent != 0 && usp >= (100.0 - warn_percent))
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result = STATE_WARNING;
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else if (warn_size > 0 && free_swap <= warn_size)
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result = STATE_WARNING;
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else if (usp >= 0.0)
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result = STATE_OK;
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return result;
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}
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/* process command-line arguments */
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int
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process_arguments (int argc, char **argv)
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{
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int c = 0; /* option character */
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int option = 0;
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static struct option longopts[] = {
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{"warning", required_argument, 0, 'w'},
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{"critical", required_argument, 0, 'c'},
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{"allswaps", no_argument, 0, 'a'},
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{"verbose", no_argument, 0, 'v'},
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{"version", no_argument, 0, 'V'},
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{"help", no_argument, 0, 'h'},
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{0, 0, 0, 0}
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};
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if (argc < 2)
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return ERROR;
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while (1) {
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c = getopt_long (argc, argv, "+?Vvhac:w:", longopts, &option);
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if (c == -1 || c == EOF)
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break;
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switch (c) {
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case 'w': /* warning size threshold */
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if (is_intnonneg (optarg)) {
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warn_size = (double) atoi (optarg);
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break;
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}
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else if (strstr (optarg, ",") &&
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strstr (optarg, "%") &&
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sscanf (optarg, "%g,%d%%", &warn_size, &warn_percent) == 2) {
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warn_size = floor(warn_size);
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break;
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}
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else if (strstr (optarg, "%") &&
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sscanf (optarg, "%d%%", &warn_percent) == 1) {
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break;
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}
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else {
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usage4 (_("Warning threshold must be integer or percentage!"));
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}
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case 'c': /* critical size threshold */
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if (is_intnonneg (optarg)) {
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crit_size = (double) atoi (optarg);
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break;
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}
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else if (strstr (optarg, ",") &&
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strstr (optarg, "%") &&
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sscanf (optarg, "%g,%d%%", &crit_size, &crit_percent) == 2) {
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crit_size = floor(crit_size);
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break;
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}
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else if (strstr (optarg, "%") &&
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sscanf (optarg, "%d%%", &crit_percent) == 1) {
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break;
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}
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else {
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usage4 (_("Critical threshold must be integer or percentage!"));
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}
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case 'a': /* all swap */
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allswaps = TRUE;
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break;
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case 'v': /* verbose */
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verbose++;
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break;
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case 'V': /* version */
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print_revision (progname, revision);
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exit (STATE_OK);
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case 'h': /* help */
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print_help ();
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exit (STATE_OK);
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case '?': /* error */
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usage2 (_("Unknown argument"), optarg);
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}
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}
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c = optind;
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if (c == argc)
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return validate_arguments ();
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if (warn_percent == 0 && is_intnonneg (argv[c]))
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warn_percent = atoi (argv[c++]);
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if (c == argc)
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return validate_arguments ();
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if (crit_percent == 0 && is_intnonneg (argv[c]))
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crit_percent = atoi (argv[c++]);
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if (c == argc)
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return validate_arguments ();
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if (warn_size == 0 && is_intnonneg (argv[c]))
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warn_size = (double) atoi (argv[c++]);
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if (c == argc)
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return validate_arguments ();
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if (crit_size == 0 && is_intnonneg (argv[c]))
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crit_size = (double) atoi (argv[c++]);
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return validate_arguments ();
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}
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int
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validate_arguments (void)
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{
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if (warn_percent == 0 && crit_percent == 0 && warn_size == 0
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&& crit_size == 0) {
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return ERROR;
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}
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else if (warn_percent < crit_percent) {
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usage4
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(_("Warning percentage should be more than critical percentage"));
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}
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else if (warn_size < crit_size) {
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usage4
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(_("Warning free space should be more than critical free space"));
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}
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return OK;
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}
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void
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print_help (void)
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{
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print_revision (progname, revision);
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printf (_(COPYRIGHT), copyright, email);
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printf (_("Check swap space on local machine.\n\n"));
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print_usage ();
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printf (_(UT_HELP_VRSN));
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printf (_("\n\
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-w, --warning=INTEGER\n\
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Exit with WARNING status if less than INTEGER bytes of swap space are free\n\
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-w, --warning=PERCENT%%\n\
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Exit with WARNING status if less than PERCENT of swap space is free\n\
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-c, --critical=INTEGER\n\
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Exit with CRITICAL status if less than INTEGER bytes of swap space are free\n\
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-c, --critical=PERCENT%%\n\
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Exit with CRITCAL status if less than PERCENT of swap space is free\n\
|
|
-a, --allswaps\n\
|
|
Conduct comparisons for all swap partitions, one by one\n\
|
|
-v, --verbose\n\
|
|
Verbose output. Up to 3 levels\n"));
|
|
|
|
printf (_("\n\
|
|
On AIX, if -a is specified, uses lsps -a, otherwise uses lsps -s.\n"));
|
|
|
|
printf (_(UT_SUPPORT));
|
|
}
|
|
|
|
|
|
|
|
void
|
|
print_usage (void)
|
|
{
|
|
printf ("\
|
|
Usage: %s [-av] -w <percent_free>%% -c <percent_free>%%\n\
|
|
%s [-av] -w <bytes_free> -c <bytes_free>\n", progname, progname);
|
|
}
|