aboutsummaryrefslogtreecommitdiff
path: root/plugins/check_disk.c
diff options
context:
space:
mode:
Diffstat (limited to 'plugins/check_disk.c')
-rw-r--r--plugins/check_disk.c353
1 files changed, 353 insertions, 0 deletions
diff --git a/plugins/check_disk.c b/plugins/check_disk.c
new file mode 100644
index 00000000..d7aad072
--- /dev/null
+++ b/plugins/check_disk.c
@@ -0,0 +1,353 @@
+/******************************************************************************
+ *
+ * CHECK_DISK.C
+ *
+ * Program: Disk space plugin for Nagios
+ * License: GPL
+ * Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
+ * Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
+ *
+ * $Id$
+ *
+ * Description:
+ *
+ * This plugin will use the /bin/df command to check the free space on
+ * currently mounted filesystems. If the percent used disk space is
+ * above <c_dfp>, a STATE_CRITICAL is returned. If the percent used
+ * disk space is above <w_dfp>, a STATE_WARNING is returned. If the
+ * speicified filesystem cannot be read, a STATE_CRITICAL is returned,
+ * other errors with reading the output result in a STATE_UNKNOWN
+ * error.
+ *
+ * Notes:
+ * - IRIX support added by Charlie Cook 4-16-1999
+ * - Modifications by Karl DeBisschop 1999-11-24
+ * reformat code to 80 char screen width
+ * set STATE_WARNING if stderr is written or spclose status set
+ * set default result to STAT_UNKNOWN
+ * initailize usp to -1, eliminate 'found' variable
+ * accept any filename/filesystem
+ * use sscanf, drop while loop
+ *
+ *****************************************************************************/
+
+#include "common.h"
+#include "popen.h"
+#include "utils.h"
+#include <stdarg.h>
+
+#define PROGNAME "check_disk"
+
+int process_arguments (int, char **);
+int call_getopt (int, char **);
+int validate_arguments (void);
+int check_disk (int usp, int free_disk);
+void print_help (void);
+void print_usage (void);
+
+int w_df = -1;
+int c_df = -1;
+float w_dfp = -1.0;
+float c_dfp = -1.0;
+char *path = NULL;
+int verbose = FALSE;
+
+int
+main (int argc, char **argv)
+{
+ int len;
+ int usp = -1;
+ int total_disk = -1;
+ int used_disk = -1;
+ int free_disk = -1;
+ int result = STATE_UNKNOWN;
+ char *command_line = NULL;
+ char input_buffer[MAX_INPUT_BUFFER] = "";
+ char file_system[MAX_INPUT_BUFFER] = "";
+ char outbuf[MAX_INPUT_BUFFER] = "";
+ char *output = NULL;
+
+ if (process_arguments (argc, argv) != OK)
+ usage ("Could not parse arguments\n");
+
+ command_line = ssprintf (command_line, "%s %s", DF_COMMAND, path);
+
+ if (verbose)
+ printf ("%s ==> ", command_line);
+
+ child_process = spopen (command_line);
+ if (child_process == NULL) {
+ printf ("Could not open pipe: %s\n", command_line);
+ 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", command_line);
+ }
+
+ while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
+
+ if (!index (input_buffer, '/'))
+ continue;
+
+ if (sscanf
+ (input_buffer, "%s %d %d %d %d%%", file_system, &total_disk,
+ &used_disk, &free_disk, &usp) == 5
+ || sscanf (input_buffer, "%s %*s %d %d %d %d%%", file_system,
+ &total_disk, &used_disk, &free_disk, &usp) == 5) {
+ result = max (result, check_disk (usp, free_disk));
+ len =
+ snprintf (outbuf, MAX_INPUT_BUFFER - 1,
+ " [%d kB (%d%%) free on %s]", free_disk, 100 - usp,
+ file_system);
+ outbuf[len] = 0;
+ output = strscat (output, outbuf);
+ }
+ else {
+ printf ("Unable to read output:\n%s\n%s\n", command_line, input_buffer);
+ return result;
+ }
+ }
+
+ /* 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);
+
+ else if (usp < 0)
+ printf ("Disk %s not mounted or nonexistant\n", argv[3]);
+ else if (result == STATE_UNKNOWN)
+ printf ("Unable to read output\n%s\n%s\n", command_line, input_buffer);
+ else
+ printf ("DISK %s -%s\n", state_text (result), output);
+
+ return result;
+}
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+ int c;
+
+ if (argc < 2)
+ return ERROR;
+
+ for (c = 1; c < argc; c++) {
+ if (strcmp ("-to", argv[c]) == 0) {
+ strcpy (argv[c], "-t");
+ }
+ }
+
+ c = 0;
+ while ((c += (call_getopt (argc - c, &argv[c]))) < argc) {
+
+ if (w_dfp == -1 && is_intnonneg (argv[c]))
+ w_dfp = (100.0 - atof (argv[c]));
+ else if (c_dfp == -1 && is_intnonneg (argv[c]))
+ c_dfp = (100.0 - atof (argv[c]));
+ else if (path == NULL || path[0] == 0)
+ path = strscpy (path, argv[c]);
+ }
+
+ if (path == NULL) {
+ path = malloc (1);
+ if (path == NULL)
+ terminate (STATE_UNKNOWN, "Could not malloc empty path\n");
+ path[0] = 0;
+ }
+
+ 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'},
+ {"timeout", required_argument, 0, 't'},
+ {"path", required_argument, 0, 'p'},
+ {"partition", required_argument, 0, 'p'},
+ {"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, "+?Vhvt:c:w:p:", long_options, &option_index);
+#else
+ c = getopt (argc, argv, "+?Vhvt:c:w:p:");
+#endif
+
+ i++;
+
+ if (c == -1 || c == EOF || c == 1)
+ break;
+
+ switch (c) {
+ case 't':
+ case 'c':
+ case 'w':
+ case 'p':
+ i++;
+ }
+
+ switch (c) {
+ case 'w': /* warning time threshold */
+ if (is_intnonneg (optarg)) {
+ w_df = atoi (optarg);
+ break;
+ }
+ else if (strpbrk (optarg, ",:") &&
+ strstr (optarg, "%") &&
+ sscanf (optarg, "%d%*[:,]%f%%", &w_df, &w_dfp) == 2) {
+ break;
+ }
+ else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &w_dfp) == 1) {
+ break;
+ }
+ else {
+ usage ("Warning threshold must be integer or percentage!\n");
+ }
+ case 'c': /* critical time threshold */
+ if (is_intnonneg (optarg)) {
+ c_df = atoi (optarg);
+ break;
+ }
+ else if (strpbrk (optarg, ",:") &&
+ strstr (optarg, "%") &&
+ sscanf (optarg, "%d%*[,:]%f%%", &c_df, &c_dfp) == 2) {
+ break;
+ }
+ else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &c_dfp) == 1) {
+ break;
+ }
+ else {
+ usage ("Critical threshold must be integer or percentage!\n");
+ }
+ case 't': /* timeout period */
+ if (is_integer (optarg)) {
+ timeout_interval = atoi (optarg);
+ break;
+ }
+ else {
+ usage ("Timeout Interval must be an integer!\n");
+ }
+ case 'p': /* path or partition */
+ path = optarg;
+ break;
+ case 'v': /* verbose */
+ verbose = TRUE;
+ break;
+ case 'V': /* version */
+ print_revision (my_basename (argv[0]), "$Revision$");
+ exit (STATE_OK);
+ case 'h': /* help */
+ print_help ();
+ exit (STATE_OK);
+ case '?': /* help */
+ usage ("check_disk: unrecognized option\n");
+ break;
+ }
+ }
+ return i;
+}
+
+int
+validate_arguments ()
+{
+ if (w_df < 0 && c_df < 0 && w_dfp < 0 && c_dfp < 0) {
+ printf ("INPUT ERROR: Unable to parse command line\n");
+ return ERROR;
+ }
+ else if ((w_dfp >= 0 || c_dfp >= 0)
+ && (w_dfp < 0 || c_dfp < 0 || w_dfp > 100 || c_dfp > 100
+ || c_dfp > w_dfp)) {
+ printf
+ ("INPUT ERROR: C_DFP (%f) should be less than W_DFP (%f) and both should be between zero and 100 percent, inclusive\n",
+ c_dfp, w_dfp);
+ return ERROR;
+ }
+ else if ((w_df > 0 || c_df > 0) && (w_df < 0 || c_df < 0 || c_df > w_df)) {
+ printf
+ ("INPUT ERROR: C_DF (%d) should be less than W_DF (%d) and both should be greater than zero\n",
+ c_df, w_df);
+ return ERROR;
+ }
+ else {
+ return OK;
+ }
+}
+
+int
+check_disk (usp, free_disk)
+{
+ int result = STATE_UNKNOWN;
+ /* check the percent used space against thresholds */
+ if (usp >= 0 && usp >= (100.0 - c_dfp))
+ result = STATE_CRITICAL;
+ else if (c_df >= 0 && free_disk <= c_df)
+ result = STATE_CRITICAL;
+ else if (usp >= 0 && usp >= (100.0 - w_dfp))
+ result = STATE_WARNING;
+ else if (w_df >= 0 && free_disk <= w_df)
+ result = STATE_WARNING;
+ else if (usp >= 0.0)
+ result = STATE_OK;
+ return result;
+}
+
+void
+print_help (void)
+{
+ print_revision (PROGNAME, "$Revision$");
+ printf
+ ("Copyright (c) 2000 Ethan Galstad/Karl DeBisschop\n\n"
+ "This plugin will check the percent of used disk space on a mounted\n"
+ "file system and generate an alert if percentage is above one of the\n"
+ "threshold values.\n\n");
+ print_usage ();
+ printf
+ ("\nOptions:\n"
+ " -w, --warning=INTEGER\n"
+ " Exit with WARNING status if less than INTEGER kilobytes of disk are free\n"
+ " -w, --warning=PERCENT%%\n"
+ " Exit with WARNING status if more than PERCENT of disk space is free\n"
+ " -c, --critical=INTEGER\n"
+ " Exit with CRITICAL status if less than INTEGER kilobytes of disk are free\n"
+ " -c, --critical=PERCENT%%\n"
+ " Exit with CRITCAL status if more than PERCENT of disk space is free\n"
+ " -p, --path=PATH, --partition=PARTTION\n"
+ " Path or partition (checks all mounted partitions if unspecified)\n"
+ " -v, --verbose\n"
+ " Show details for command-line debugging (do not use with nagios server)\n"
+ " -h, --help\n"
+ " Print detailed help screen\n"
+ " -V, --version\n" " Print version information\n\n");
+ support ();
+}
+
+void
+print_usage (void)
+{
+ printf
+ ("Usage: %s -w limit -c limit [-p path] [-t timeout] [--verbose]\n"
+ " %s (-h|--help)\n"
+ " %s (-V|--version)\n", PROGNAME, PROGNAME, PROGNAME);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 05:28:08 +0000