mirror of
https://github.com/monitoring-plugins/monitoring-plugins.git
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9e009c4b11
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@190 f882894a-f735-0410-b71e-b25c423dba1c
371 lines
10 KiB
C
371 lines
10 KiB
C
/******************************************************************************
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*
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* CHECK_DISK.C
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*
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* Program: Disk space plugin for Nagios
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* License: GPL
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* Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
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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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* Description:
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*
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* This plugin will use the /bin/df command to check the free space on
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* currently mounted filesystems. If the percent used disk space is
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* above <c_dfp>, a STATE_CRITICAL is returned. If the percent used
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* disk space is above <w_dfp>, a STATE_WARNING is returned. If the
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* speicified filesystem cannot be read, a STATE_CRITICAL is returned,
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* other errors with reading the output result in a STATE_UNKNOWN
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* error.
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*
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* Notes:
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* - IRIX support added by Charlie Cook 4-16-1999
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* - Modifications by Karl DeBisschop 1999-11-24
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* reformat code to 80 char screen width
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* set STATE_WARNING if stderr is written or spclose status set
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* set default result to STAT_UNKNOWN
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* initailize usp to -1, eliminate 'found' variable
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* accept any filename/filesystem
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* use sscanf, drop while loop
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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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#include <stdarg.h>
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#define PROGNAME "check_disk"
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#define REVISION "$Revision$"
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#define COPYRIGHT "2000-2002"
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int process_arguments (int, char **);
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int validate_arguments (void);
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int check_disk (int usp, int free_disk);
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void print_help (void);
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void print_usage (void);
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int w_df = -1;
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int c_df = -1;
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float w_dfp = -1.0;
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float c_dfp = -1.0;
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char *path = "";
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int verbose = FALSE;
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int display_mntp = FALSE;
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int
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main (int argc, char **argv)
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{
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int len;
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int usp = -1;
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int total_disk = -1;
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int used_disk = -1;
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int free_disk = -1;
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int result = STATE_UNKNOWN;
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int temp_result = STATE_UNKNOWN;
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char *command_line = NULL;
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char input_buffer[MAX_INPUT_BUFFER] = "";
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char file_system[MAX_INPUT_BUFFER] = "";
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char mntp[MAX_INPUT_BUFFER] = "";
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char outbuf[MAX_INPUT_BUFFER] = "";
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char *output = NULL;
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if (process_arguments (argc, argv) != OK)
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usage ("Could not parse arguments\n");
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asprintf (&command_line, "%s %s", DF_COMMAND, path);
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if (verbose)
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printf ("%s ==> ", command_line);
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child_process = spopen (command_line);
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if (child_process == NULL) {
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printf ("Could not open pipe: %s\n", command_line);
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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", command_line);
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}
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while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
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if (!index (input_buffer, '/'))
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continue;
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if (sscanf
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(input_buffer, "%s %d %d %d %d%% %s", file_system, &total_disk,
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&used_disk, &free_disk, &usp, &mntp) == 6
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|| sscanf (input_buffer, "%s %*s %d %d %d %d%% %s", file_system,
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&total_disk, &used_disk, &free_disk, &usp, &mntp) == 6) {
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/* cannot use max now that STATE_UNKNOWN is greater than STATE_CRITICAL
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result = max (result, check_disk (usp, free_disk)); */
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temp_result = check_disk (usp, free_disk) ;
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if ( temp_result == STATE_CRITICAL ) {
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result = STATE_CRITICAL;
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}
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else if (temp_result == STATE_WARNING) {
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if ( !( result == STATE_CRITICAL) ) {
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result = STATE_WARNING;
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}
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}
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else if (temp_result == STATE_OK) {
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if ( ! ( result == STATE_CRITICAL || result == STATE_WARNING) ){
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result = STATE_OK;
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}
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}
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else if (temp_result == STATE_UNKNOWN) {
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if ( ! ( result == STATE_CRITICAL || result == STATE_WARNING || result == STATE_OK) ){
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result = STATE_UNKNOWN;
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}
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}
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else {
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/* don't have a match with the return value from check_disk() */
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result = STATE_UNKNOWN;
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}
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len =
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snprintf (outbuf, MAX_INPUT_BUFFER - 1,
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" [%d kB (%d%%) free on %s]", free_disk, 100 - usp,
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display_mntp ? mntp : file_system);
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outbuf[len] = 0;
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output = strscat (output, outbuf);
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}
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else {
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printf ("Unable to read output:\n%s\n%s\n", command_line, input_buffer);
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return result;
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}
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}
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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 (result, STATE_WARNING); */
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if( !( result == STATE_CRITICAL) ) {
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result = STATE_WARNING;
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}
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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 (result, STATE_WARNING); */
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if( !( result == STATE_CRITICAL) ) {
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result = STATE_WARNING;
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}
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if (usp < 0)
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printf ("Disk \"%s\" not mounted or nonexistant\n", path);
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else if (result == STATE_UNKNOWN)
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printf ("Unable to read output\n%s\n%s\n", command_line, input_buffer);
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else
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printf ("DISK %s -%s\n", state_text (result), output);
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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;
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#ifdef HAVE_GETOPT_H
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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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{"timeout", required_argument, 0, 't'},
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{"path", required_argument, 0, 'p'},
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{"partition", required_argument, 0, 'p'},
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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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{"mountpoint", no_argument, 0, 'm'},
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{0, 0, 0, 0}
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};
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#endif
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if (argc < 2)
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return ERROR;
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for (c = 1; c < argc; c++)
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if (strcmp ("-to", argv[c]) == 0)
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strcpy (argv[c], "-t");
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while (1) {
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#ifdef HAVE_GETOPT_H
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c =
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getopt_long (argc, argv, "Vhvt:c:w:p:m", long_options, &option_index);
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#else
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c = getopt (argc, argv, "Vhvt:c:w:p:m");
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#endif
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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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w_df = atoi (optarg);
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break;
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}
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else if (strpbrk (optarg, ",:") &&
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strstr (optarg, "%") &&
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sscanf (optarg, "%d%*[:,]%f%%", &w_df, &w_dfp) == 2) {
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break;
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}
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else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &w_dfp) == 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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case 'c': /* critical time threshold */
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if (is_intnonneg (optarg)) {
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c_df = atoi (optarg);
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break;
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}
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else if (strpbrk (optarg, ",:") &&
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strstr (optarg, "%") &&
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sscanf (optarg, "%d%*[,:]%f%%", &c_df, &c_dfp) == 2) {
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break;
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}
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else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &c_dfp) == 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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case 't': /* timeout period */
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if (is_integer (optarg)) {
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timeout_interval = atoi (optarg);
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break;
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}
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else {
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usage ("Timeout Interval must be an integer!\n");
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}
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case 'p': /* path or partition */
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path = optarg;
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break;
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case 'v': /* verbose */
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verbose = TRUE;
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break;
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case 'm': /* display mountpoint */
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display_mntp = TRUE;
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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 ("check_disk: unrecognized option\n");
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break;
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}
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}
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c = optind;
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if (w_dfp == -1 && argc > c && is_intnonneg (argv[c]))
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w_dfp = (100.0 - atof (argv[c++]));
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if (c_dfp == -1 && argc > c && is_intnonneg (argv[c]))
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c_dfp = (100.0 - atof (argv[c++]));
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if (argc > c && strlen (path) == 0)
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path = argv[c++];
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return validate_arguments ();
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}
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int
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validate_arguments ()
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{
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if (w_df < 0 && c_df < 0 && w_dfp < 0 && c_dfp < 0) {
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printf ("INPUT ERROR: Unable to parse command line\n");
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return ERROR;
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}
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else if ((w_dfp >= 0 || c_dfp >= 0)
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&& (w_dfp < 0 || c_dfp < 0 || w_dfp > 100 || c_dfp > 100
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|| c_dfp > w_dfp)) {
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printf
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("INPUT ERROR: C_DFP (%f) should be less than W_DFP (%f) and both should be between zero and 100 percent, inclusive\n",
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c_dfp, w_dfp);
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return ERROR;
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}
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else if ((w_df > 0 || c_df > 0) && (w_df < 0 || c_df < 0 || c_df > w_df)) {
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printf
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("INPUT ERROR: C_DF (%d) should be less than W_DF (%d) and both should be greater than zero\n",
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c_df, w_df);
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return ERROR;
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}
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else {
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return OK;
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}
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}
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int
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check_disk (usp, free_disk)
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{
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int result = STATE_UNKNOWN;
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/* check the percent used space against thresholds */
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if (usp >= 0 && usp >= (100.0 - c_dfp))
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result = STATE_CRITICAL;
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else if (c_df >= 0 && free_disk <= c_df)
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result = STATE_CRITICAL;
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else if (usp >= 0 && usp >= (100.0 - w_dfp))
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result = STATE_WARNING;
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else if (w_df >= 0 && free_disk <= w_df)
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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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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
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("Copyright (c) 2000 Ethan Galstad/Karl DeBisschop\n\n"
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"This plugin will check the percent of used disk space on a mounted\n"
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"file system and generate an alert if percentage is above one of the\n"
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"threshold values.\n\n");
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print_usage ();
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printf
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("\nOptions:\n"
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" -w, --warning=INTEGER\n"
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" Exit with WARNING status if less than INTEGER kilobytes of disk are free\n"
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" -w, --warning=PERCENT%%\n"
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" Exit with WARNING status if more than PERCENT of disk space is free\n"
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" -c, --critical=INTEGER\n"
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" Exit with CRITICAL status if less than INTEGER kilobytes of disk are free\n"
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" -c, --critical=PERCENT%%\n"
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" Exit with CRITCAL status if more than PERCENT of disk space is free\n"
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" -p, --path=PATH, --partition=PARTTION\n"
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" Path or partition (checks all mounted partitions if unspecified)\n"
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" -m, --mountpoint\n"
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" Display the mountpoint instead of the partition\n"
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" -v, --verbose\n"
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" Show details for command-line debugging (do not use with nagios server)\n"
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" -h, --help\n"
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" Print detailed help screen\n"
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" -V, --version\n" " Print version information\n\n");
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support ();
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}
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void
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print_usage (void)
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{
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printf
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("Usage: %s -w limit -c limit [-p path] [-t timeout] [-m] [--verbose]\n"
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" %s (-h|--help)\n"
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" %s (-V|--version)\n", PROGNAME, PROGNAME, PROGNAME);
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}
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