1 files changed, 325 insertions, 0 deletions

diff --git a/plugins/check_swap.c b/plugins/check_swap.c
new file mode 100644
index 0000000..d225e1d
--- /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 ();
+}