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-rw-r--r--plugins/check_swap.c325
1 files changed, 325 insertions, 0 deletions
diff --git a/plugins/check_swap.c b/plugins/check_swap.c
new file mode 100644
index 00000000..d225e1dc
--- /dev/null
+++ b/plugins/check_swap.c
@@ -0,0 +1,325 @@
+/******************************************************************************
+*
+* CHECK_SWAP.C
+*
+* Program: Process plugin for Nagios
+* License: GPL
+* Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
+*
+* $Id$
+*
+******************************************************************************/
+
+#include "common.h"
+#include "popen.h"
+#include "utils.h"
+
+#define PROGNAME "check_swap"
+
+int process_arguments (int argc, char **argv);
+int call_getopt (int argc, char **argv);
+int validate_arguments (void);
+void print_usage (void);
+void print_help (void);
+
+int warn_percent = 200, crit_percent = 200, warn_size = -1, crit_size = -1;
+
+int
+main (int argc, char **argv)
+{
+ int total_swap, used_swap, free_swap, percent_used;
+ int result = STATE_OK;
+ char input_buffer[MAX_INPUT_BUFFER];
+#ifdef HAVE_SWAP
+ char *temp_buffer;
+#endif
+#ifdef HAVE_PROC_MEMINFO
+ FILE *fp;
+#endif
+ char str[32];
+ char *status = NULL;
+
+ if (process_arguments (argc, argv) != OK)
+ usage ("Invalid command arguments supplied\n");
+
+#ifdef HAVE_PROC_MEMINFO
+ fp = fopen (PROC_MEMINFO, "r");
+ status = ssprintf (status, "%s", "Swap used:");
+ while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
+ sscanf (input_buffer, " %s %d %d %d", str, &total_swap, &used_swap,
+ &free_swap);
+ if (strstr (str, "Swap")) {
+ percent_used = 100 * (((float) used_swap) / ((float) total_swap));
+ status = ssprintf
+ (status,
+ "%s %2d%% (%d bytes out of %d)",
+ status, percent_used, used_swap, total_swap);
+ if (percent_used >= crit_percent || free_swap <= crit_size)
+ result = STATE_CRITICAL;
+ else if (percent_used >= warn_percent || free_swap <= warn_size)
+ result = STATE_WARNING;
+ break;
+ }
+ }
+ fclose (fp);
+#else
+#ifdef HAVE_SWAP
+ 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, "free"))
+ sprintf (str, "%s %s", str, "%f");
+ else
+ sprintf (str, "%s %s", str, "%*s");
+ temp_buffer = strtok (NULL, " \n");
+ }
+ }
+
+ status = ssprintf (status, "%s", "Swap used:");
+ while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
+ sscanf (input_buffer, SWAP_FORMAT, &total_swap, &free_swap);
+ used_swap = total_swap - free_swap;
+ percent_used = 100 * ((float) used_swap) / ((float) total_swap);
+ status = ssprintf
+ (status,
+ "%s %2d%% (%d bytes out of %d)",
+ status, percent_used, used_swap, total_swap);
+ if (percent_used >= crit_percent || free_swap <= crit_size)
+ result = STATE_CRITICAL;
+ else if (percent_used >= warn_percent || free_swap <= warn_size)
+ result = STATE_WARNING;
+ }
+
+ /* If we get anything on STDERR, at least set warning */
+ while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
+ result = max (result, STATE_WARNING);
+
+ /* close stderr */
+ (void) fclose (child_stderr);
+
+ /* close the pipe */
+ if (spclose (child_process))
+ result = max (result, STATE_WARNING);
+#endif
+#endif
+
+#ifndef SWAP_COMMAND
+#ifndef SWAP_FILE
+#ifndef HAVE_PROC_MEMINFO
+ return STATE_UNKNOWN;
+#endif
+#endif
+#endif
+
+ if (result == STATE_OK)
+ printf ("Swap ok - %s\n", status);
+ else if (result == STATE_CRITICAL)
+ printf ("CRITICAL - %s\n", status);
+ else if (result == STATE_WARNING)
+ printf ("WARNING - %s\n", status);
+ else if (result == STATE_UNKNOWN)
+ printf ("Unable to read output\n");
+ else {
+ result = STATE_UNKNOWN;
+ printf ("UNKNOWN - %s\n", status);
+ }
+
+ return result;
+}
+
+
+
+
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+ int c;
+
+ if (argc < 2)
+ return ERROR;
+
+ c = 0;
+ while (c += (call_getopt (argc - c, &argv[c]))) {
+ if (argc <= c)
+ break;
+
+ if (warn_percent > 100 && is_intnonneg (argv[c]))
+ warn_percent = atoi (argv[c]);
+ else if (crit_percent > 100 && is_intnonneg (argv[c]))
+ crit_percent = atoi (argv[c]);
+ else if (warn_size < 0 && is_intnonneg (argv[c]))
+ warn_size = atoi (argv[c]);
+ else if (crit_size < 0 && is_intnonneg (argv[c]))
+ crit_size = atoi (argv[c]);
+ }
+
+ return validate_arguments ();
+}
+
+
+
+
+
+int
+call_getopt (int argc, char **argv)
+{
+ int c, i = 0;
+
+#ifdef HAVE_GETOPT_H
+ int option_index = 0;
+ static struct option long_options[] = {
+ {"warning", required_argument, 0, 'w'},
+ {"critical", required_argument, 0, 'c'},
+ {"verbose", no_argument, 0, 'v'},
+ {"version", no_argument, 0, 'V'},
+ {"help", no_argument, 0, 'h'},
+ {0, 0, 0, 0}
+ };
+#endif
+
+ while (1) {
+#ifdef HAVE_GETOPT_H
+ c = getopt_long (argc, argv, "+?Vhc:w:", long_options, &option_index);
+#else
+ c = getopt (argc, argv, "+?Vhc:w:");
+#endif
+
+ i++;
+
+ if (c == -1 || c == EOF)
+ break;
+
+ switch (c) {
+ case 'c':
+ case 'w':
+ i++;
+ }
+
+ switch (c) {
+ case 'w': /* warning time threshold */
+ if (is_intnonneg (optarg)) {
+ warn_size = atoi (optarg);
+ break;
+ }
+ else if (strstr (optarg, ",") &&
+ strstr (optarg, "%") &&
+ sscanf (optarg, "%d,%d%%", &warn_size, &warn_percent) == 2) {
+ break;
+ }
+ else if (strstr (optarg, "%") &&
+ sscanf (optarg, "%d%%", &warn_percent) == 1) {
+ break;
+ }
+ else {
+ usage ("Warning threshold must be integer or percentage!\n");
+ }
+ case 'c': /* critical time threshold */
+ if (is_intnonneg (optarg)) {
+ crit_size = atoi (optarg);
+ break;
+ }
+ else if (strstr (optarg, ",") &&
+ strstr (optarg, "%") &&
+ sscanf (optarg, "%d,%d%%", &crit_size, &crit_percent) == 2) {
+ break;
+ }
+ else if (strstr (optarg, "%") &&
+ sscanf (optarg, "%d%%", &crit_percent) == 1) {
+ break;
+ }
+ else {
+ usage ("Critical threshold must be integer or percentage!\n");
+ }
+ case 'V': /* version */
+ print_revision (my_basename (argv[0]), "$Revision$");
+ exit (STATE_OK);
+ case 'h': /* help */
+ print_help ();
+ exit (STATE_OK);
+ case '?': /* help */
+ usage ("Invalid argument\n");
+ }
+ }
+ return i;
+}
+
+
+
+
+
+int
+validate_arguments (void)
+{
+ if (warn_percent > 100 && crit_percent > 100 && warn_size < 0
+ && crit_size < 0) {
+ return ERROR;
+ }
+ else if (warn_percent > crit_percent) {
+ usage
+ ("Warning percentage should not be less than critical percentage\n");
+ }
+ else if (warn_size < crit_size) {
+ usage
+ ("Warning free space should not be more than critical free space\n");
+ }
+ return OK;
+}
+
+
+
+
+
+void
+print_usage (void)
+{
+ printf
+ ("Usage: check_swap -w <used_percentage>%% -c <used_percentage>%%\n"
+ " check_swap -w <bytes_free> -c <bytes_free>\n"
+ " check_swap (-V|--version)\n" " check_swap (-h|--help)\n");
+}
+
+
+
+
+
+void
+print_help (void)
+{
+ print_revision (PROGNAME, "$Revision$");
+ printf
+ ("Copyright (c) 2000 Karl DeBisschop\n\n"
+ "This plugin will check all of the swap partitions and return an\n"
+ "error if the the avalable swap space is less than specified.\n\n");
+ print_usage ();
+ printf
+ ("\nOptions:\n"
+ " -w, --warning=INTEGER\n"
+ " Exit with WARNING status if less than INTEGER bytes of swap space are free\n"
+ " -w, --warning=PERCENT%%\n"
+ " Exit with WARNING status if more than PERCENT of swap space has been used\n"
+ " -c, --critical=INTEGER\n"
+ " Exit with CRITICAL status if less than INTEGER bytes of swap space are free\n"
+ " -c, --critical=PERCENT%%\n"
+ " Exit with CRITCAL status if more than PERCENT of swap space has been used\n"
+ " -h, --help\n"
+ " Print detailed help screen\n"
+ " -V, --version\n" " Print version information\n\n");
+ support ();
+}
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