mirror of
https://github.com/monitoring-plugins/monitoring-plugins.git
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b07cec408f
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@631 f882894a-f735-0410-b71e-b25c423dba1c
379 lines
9.9 KiB
C
379 lines
9.9 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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* $Id$
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*
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*****************************************************************************/
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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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const char *progname = "check_swap";
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const char *revision = "$Revision$";
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const char *copyright = "2000-2003";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
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int check_swap (int usp, int 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 = 200;
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int crit_percent = 200;
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long unsigned int warn_size = 0;
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long unsigned int crit_size = 0;
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int verbose;
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int allswaps;
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#if !defined(sun)
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int sun = 0; /* defined by compiler if it is a sun solaris system */
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#endif
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void
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print_usage (void)
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{
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printf (_("Usage:\n\
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%s [-a] -w <used_percentage>%% -c <used_percentage>%%\n\
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%s [-a] -w <bytes_free> -c <bytes_free>\n\
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%s (-h | --help) for detailed help\n\
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%s (-V | --version) for version information\n"),
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progname, progname, progname, progname);
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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 server.\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 has been used\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 has been used\n\
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-a, --allswaps\n\
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Conduct comparisons for all swap partitions, one by one\n"));
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#ifdef sun
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printf (_("\n\
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On Solaris, if -a specified, uses swap -l, otherwise uses swap -s.\n\
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Will be discrepencies because swap -s counts allocated swap and includes\n\
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real memory\n"));
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#endif
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support ();
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}
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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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long unsigned int total_swap = 0, used_swap = 0, free_swap = 0;
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long unsigned int dsktotal, dskused, dskfree;
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int result = STATE_OK;
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char input_buffer[MAX_INPUT_BUFFER];
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#ifdef HAVE_SWAP
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int conv_factor; /* Convert to MBs */
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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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#endif
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#ifdef HAVE_PROC_MEMINFO
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FILE *fp;
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#endif
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char str[32];
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char *status = "";
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if (process_arguments (argc, argv) != OK)
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usage (_("Invalid command arguments supplied\n"));
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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 %lu %lu %lu", str, &dsktotal, &dskused, &dskfree) == 4 &&
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strstr (str, "Swap")) {
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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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#endif
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#ifdef HAVE_SWAP
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if (!allswaps && sun) {
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asprintf(&swap_command, "%s", "/usr/sbin/swap -s");
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asprintf(&swap_format, "%s", "%*s %*dk %*s %*s + %*dk %*s = %dk %*s %dk %*s");
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conv_factor = 2048;
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} else {
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asprintf(&swap_command, "%s", SWAP_COMMAND);
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asprintf(&swap_format, "%s", SWAP_FORMAT);
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conv_factor = SWAP_CONVERSION;
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}
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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 (!allswaps && sun) {
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sscanf (input_buffer, swap_format, &used_swap, &free_swap);
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used_swap = used_swap / 1024;
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free_swap = free_swap / 1024;
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total_swap = used_swap + free_swap;
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} else {
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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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dskfree = dskfree / conv_factor;
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if (verbose >= 3)
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printf (_("total=%d, free=%d\n"), dsktotal, dskfree);
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dskused = dsktotal - dskfree;
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#endif
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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 [%lu (%d%%)]", status, dskfree, 100 - percent);
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}
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}
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}
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percent_used = 100 * ((double) used_swap) / ((double) total_swap);
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result = max_state (result, check_swap (percent_used, free_swap));
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asprintf (&status, _(" %d%% free (%lu MB out of %lu MB)%s"),
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(100 - percent_used), free_swap, total_swap, status);
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#ifdef HAVE_PROC_MEMINFO
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fclose(fp);
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#endif
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#ifdef HAVE_SWAP
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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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#endif
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terminate (result, "SWAP %s:%s\n", state_text (result), status);
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return STATE_UNKNOWN;
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}
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int
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check_swap (int usp, int free_swap)
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{
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int result = STATE_UNKNOWN;
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if (usp >= 0 && usp >= (100.0 - crit_percent))
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result = STATE_CRITICAL;
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else if (crit_size > 0 && (unsigned)free_swap <= crit_size)
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result = STATE_CRITICAL;
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else if (usp >= 0 && usp >= (100.0 - warn_percent))
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result = STATE_WARNING;
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else if (warn_size > 0 && (unsigned)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 wc = 0; /* warning counter */
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int cc = 0; /* critical counter */
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int option_index = 0;
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static struct option long_options[] = {
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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:", long_options, &option_index);
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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 time threshold */
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if (is_intnonneg (optarg)) {
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warn_size = 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, "%lu,%d%%", &warn_size, &warn_percent) == 2) {
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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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usage (_("Warning threshold must be integer or percentage!\n"));
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}
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wc++;
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case 'c': /* critical time threshold */
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if (is_intnonneg (optarg)) {
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crit_size = 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, "%lu,%d%%", &crit_size, &crit_percent) == 2) {
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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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usage (_("Critical threshold must be integer or percentage!\n"));
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}
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cc++;
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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 '?': /* help */
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usage (_("Invalid argument\n"));
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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 > 100 && 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 > 100 && 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 = 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 = 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 > 100 && crit_percent > 100 && 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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usage
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(_("Warning percentage should be more than critical percentage\n"));
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}
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else if (warn_size < crit_size) {
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usage
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(_("Warning free space should be more than critical free space\n"));
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}
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return OK;
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}
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