/****************************************************************************** * * Nagios check_disk plugin * * License: GPL * Copyright (c) 1999-2006 nagios-plugins team * * Last Modified: $Date$ * * Description: * * This file contains the check_disk plugin * * License Information: * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Id$ * *****************************************************************************/ const char *progname = "check_disk"; const char *program_name = "check_disk"; /* Required for coreutils libs */ const char *revision = "$Revision$"; const char *copyright = "1999-2006"; const char *email = "nagiosplug-devel@lists.sourceforge.net"; #include "common.h" #if HAVE_INTTYPES_H # include #endif #include #include "popen.h" #include "utils.h" #include "utils_disk.h" #include #include "fsusage.h" #include "mountlist.h" #if HAVE_LIMITS_H # include #endif /* If nonzero, show inode information. */ static int inode_format; /* If nonzero, show even filesystems with zero size or uninteresting types. */ static int show_all_fs = 1; /* If nonzero, show only local filesystems. */ static int show_local_fs = 0; /* If positive, the units to use when printing sizes; if negative, the human-readable base. */ /* static int output_block_size; */ /* If nonzero, invoke the `sync' system call before getting any usage data. Using this option can make df very slow, especially with many or very busy disks. Note that this may make a difference on some systems -- SunOs4.1.3, for one. It is *not* necessary on Linux. */ /* static int require_sync = 0; */ /* Linked list of filesystem types to display. If `fs_select_list' is NULL, list all types. This table is generated dynamically from command-line options, rather than hardcoding into the program what it thinks are the valid filesystem types; let the user specify any filesystem type they want to, and if there are any filesystems of that type, they will be shown. Some filesystem types: 4.2 4.3 ufs nfs swap ignore io vm efs dbg */ /* static struct parameter_list *fs_select_list; */ /* Linked list of filesystem types to omit. If the list is empty, don't exclude any types. */ static struct name_list *fs_exclude_list; static struct name_list *dp_exclude_list; static struct parameter_list *path_select_list = NULL; /* Linked list of mounted filesystems. */ static struct mount_entry *mount_list; /* For long options that have no equivalent short option, use a non-character as a pseudo short option, starting with CHAR_MAX + 1. */ enum { SYNC_OPTION = CHAR_MAX + 1, NO_SYNC_OPTION, BLOCK_SIZE_OPTION }; #ifdef _AIX #pragma alloca #endif /* Linked list of mounted filesystems. */ static struct mount_entry *mount_list; int process_arguments (int, char **); void print_path (const char *mypath); int validate_arguments (uintmax_t, uintmax_t, double, double, double, double, char *); int check_disk (double usp, uintmax_t free_disk, double uisp); void print_help (void); void print_usage (void); uintmax_t w_df = 0; uintmax_t c_df = 0; double w_dfp = -1.0; double c_dfp = -1.0; double w_idfp = -1.0; double c_idfp = -1.0; char *path; char *exclude_device; char *units; uintmax_t mult = 1024 * 1024; int verbose = 0; int erronly = FALSE; int display_mntp = FALSE; int exact_match = FALSE; int main (int argc, char **argv) { double usp = -1.0, uisp = -1.0; int result = STATE_UNKNOWN; int disk_result = STATE_UNKNOWN; char file_system[MAX_INPUT_BUFFER]; char *output; char *details; char *perf; uintmax_t psize; float free_space, free_space_pct, total_space, inode_space_pct; struct mount_entry *me; struct fs_usage fsp; struct parameter_list *temp_list, *path; struct name_list *seen = NULL; output = strdup (" - free space:"); details = strdup (""); perf = strdup (""); setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); mount_list = read_file_system_list (0); if (process_arguments (argc, argv) == ERROR) usage4 (_("Could not parse arguments")); /* If a list of paths has not been selected, find entire mount list and create list of paths */ if (! path_select_list) { for (me = mount_list; me; me = me->me_next) { path = np_add_parameter(&path_select_list, me->me_mountdir); path->w_df = w_df; path->c_df = c_df; path->w_dfp = w_dfp; path->c_dfp = c_dfp; path->w_idfp = w_idfp; path->c_idfp = c_idfp; path->best_match = me; } } else { np_set_best_match(path_select_list, mount_list, exact_match); /* Error if no match found for specified paths */ temp_list = path_select_list; while (temp_list) { if (! temp_list->best_match) { die (STATE_CRITICAL, _("DISK %s: %s not found\n"), _("CRITICAL"), temp_list->name); } temp_list = temp_list->name_next; } } /* Process for every path in list */ for (path = path_select_list; path; path=path->name_next) { me = path->best_match; w_df = path->w_df; c_df = path->c_df; w_dfp = path->w_dfp; c_dfp = path->c_dfp; w_idfp = path->w_idfp; c_idfp = path->c_idfp; /* Filters */ /* Remove filesystems already seen */ if (np_seen_name(seen, me->me_mountdir)) { continue; } else { np_add_name(&seen, me->me_mountdir); } /* Skip remote filesystems if we're not interested in them */ if (me->me_remote && show_local_fs) { continue; /* Skip pseudo fs's if we haven't asked for all fs's */ } else if (me->me_dummy && !show_all_fs) { continue; /* Skip excluded fstypes */ } else if (fs_exclude_list && np_find_name (fs_exclude_list, me->me_type)) { continue; /* Skip excluded fs's */ } else if (dp_exclude_list && (np_find_name (dp_exclude_list, me->me_devname) || np_find_name (dp_exclude_list, me->me_mountdir))) { continue; } get_fs_usage (me->me_mountdir, me->me_devname, &fsp); if (fsp.fsu_blocks && strcmp ("none", me->me_mountdir)) { usp = (double)(fsp.fsu_blocks - fsp.fsu_bavail) * 100 / fsp.fsu_blocks; uisp = (double)(fsp.fsu_files - fsp.fsu_ffree) * 100 / fsp.fsu_files; disk_result = check_disk (usp, fsp.fsu_bavail, uisp); result = max_state (disk_result, result); psize = fsp.fsu_blocks*fsp.fsu_blocksize/mult; /* Moved this computation up here so we can add it * to perf */ inode_space_pct = (float)fsp.fsu_ffree*100/fsp.fsu_files; asprintf (&perf, "%s %s", perf, perfdata ((!strcmp(file_system, "none") || display_mntp) ? me->me_devname : me->me_mountdir, psize-(fsp.fsu_bavail*fsp.fsu_blocksize/mult), units, TRUE, min ((uintmax_t)psize-(uintmax_t)w_df, (uintmax_t)((1.0-w_dfp/100.0)*psize)), TRUE, min ((uintmax_t)psize-(uintmax_t)c_df, (uintmax_t)((1.0-c_dfp/100.0)*psize)), TRUE, inode_space_pct, TRUE, psize)); if (disk_result==STATE_OK && erronly && !verbose) continue; free_space = (float)fsp.fsu_bavail*fsp.fsu_blocksize/mult; free_space_pct = (float)fsp.fsu_bavail*100/fsp.fsu_blocks; total_space = (float)fsp.fsu_blocks*fsp.fsu_blocksize/mult; if (disk_result!=STATE_OK || verbose>=0) asprintf (&output, ("%s %s %.0f %s (%.0f%% inode=%.0f%%);"), output, (!strcmp(file_system, "none") || display_mntp) ? me->me_devname : me->me_mountdir, free_space, units, free_space_pct, inode_space_pct); asprintf (&details, _("%s\n\ %.0f of %.0f %s (%.0f%% inode=%.0f%%) free on %s (type %s mounted on %s) warn:%lu crit:%lu warn%%:%.0f%% crit%%:%.0f%%"), details, free_space, total_space, units, free_space_pct, inode_space_pct, me->me_devname, me->me_type, me->me_mountdir, (unsigned long)w_df, (unsigned long)c_df, w_dfp, c_dfp); } } if (verbose > 2) asprintf (&output, "%s%s", output, details); printf ("DISK %s%s|%s\n", state_text (result), output, perf); return result; } /* process command-line arguments */ int process_arguments (int argc, char **argv) { int c; struct parameter_list *se; struct parameter_list *temp_list; int result = OK; struct stat *stat_buf; char *warn_freespace = NULL; char *crit_freespace = NULL; char *warn_freespace_percent = NULL; char *crit_freespace_percent = NULL; char temp_string[MAX_INPUT_BUFFER]; unsigned long l; double f; int option = 0; static struct option longopts[] = { {"timeout", required_argument, 0, 't'}, {"warning", required_argument, 0, 'w'}, {"critical", required_argument, 0, 'c'}, {"iwarning", required_argument, 0, 'W'}, /* Dang, -C is taken. We might want to reshuffle this. */ {"icritical", required_argument, 0, 'K'}, {"local", required_argument, 0, 'l'}, {"kilobytes", required_argument, 0, 'k'}, {"megabytes", required_argument, 0, 'm'}, {"units", required_argument, 0, 'u'}, {"path", required_argument, 0, 'p'}, {"partition", required_argument, 0, 'p'}, {"exclude_device", required_argument, 0, 'x'}, {"exclude-type", required_argument, 0, 'X'}, {"mountpoint", no_argument, 0, 'M'}, {"errors-only", no_argument, 0, 'e'}, {"exact-match", no_argument, 0, 'E'}, {"verbose", no_argument, 0, 'v'}, {"quiet", no_argument, 0, 'q'}, {"clear", no_argument, 0, 'C'}, {"version", no_argument, 0, 'V'}, {"help", no_argument, 0, 'h'}, {0, 0, 0, 0} }; if (argc < 2) return ERROR; np_add_name(&fs_exclude_list, "iso9660"); for (c = 1; c < argc; c++) if (strcmp ("-to", argv[c]) == 0) strcpy (argv[c], "-t"); while (1) { c = getopt_long (argc, argv, "+?VqhveCt:c:w:K:W:u:p:x:X:mklME", longopts, &option); if (c == -1 || c == EOF) break; switch (c) { case 't': /* timeout period */ if (is_integer (optarg)) { timeout_interval = atoi (optarg); break; } else { usage2 (_("Timeout interval must be a positive integer"), optarg); } case 'w': /* warning threshold */ /* if (strstr(optarg, "%")) { printf("Got percent with optarg=%s\n", optarg); warn_freespace_percent = optarg; } else { warn_freespace = optarg; } break; */ if (is_intnonneg (optarg)) { w_df = atoi (optarg); break; } else if (strpbrk (optarg, ",:") && strstr (optarg, "%") && sscanf (optarg, "%lu%*[:,]%lf%%", &l, &w_dfp) == 2) { w_df = (uintmax_t)l; break; } else if (strstr (optarg, "%") && sscanf (optarg, "%lf%%", &w_dfp) == 1) { break; } else { usage4 (_("Warning threshold must be integer or percentage!")); } case 'c': /* critical threshold */ if (is_intnonneg (optarg)) { c_df = atoi (optarg); break; } else if (strpbrk (optarg, ",:") && strstr (optarg, "%") && sscanf (optarg, "%lu%*[,:]%lf%%", &l, &c_dfp) == 2) { c_df = (uintmax_t)l; break; } else if (strstr (optarg, "%") && sscanf (optarg, "%lf%%", &c_dfp) == 1) { break; } else { usage4 (_("Critical threshold must be integer or percentage!")); } case 'W': /* warning inode threshold */ if (strstr (optarg, "%") && sscanf (optarg, "%lf%%", &w_idfp) == 1) { break; } else { usage (_("Warning inode threshold must be percentage!\n")); } case 'K': /* kritical inode threshold */ if (strstr (optarg, "%") && sscanf (optarg, "%lf%%", &c_idfp) == 1) { break; } else { usage (_("Critical inode threshold must be percentage!\n")); } case 'u': if (units) free(units); if (! strcmp (optarg, "bytes")) { mult = (uintmax_t)1; units = strdup ("B"); } else if (! strcmp (optarg, "kB")) { mult = (uintmax_t)1024; units = strdup ("kB"); } else if (! strcmp (optarg, "MB")) { mult = (uintmax_t)1024 * 1024; units = strdup ("MB"); } else if (! strcmp (optarg, "GB")) { mult = (uintmax_t)1024 * 1024 * 1024; units = strdup ("GB"); } else if (! strcmp (optarg, "TB")) { mult = (uintmax_t)1024 * 1024 * 1024 * 1024; units = strdup ("TB"); } else { die (STATE_UNKNOWN, _("unit type %s not known\n"), optarg); } if (units == NULL) die (STATE_UNKNOWN, _("failed allocating storage for '%s'\n"), "units"); break; case 'k': /* display mountpoint */ mult = 1024; if (units) free(units); units = strdup ("kB"); break; case 'm': /* display mountpoint */ mult = 1024 * 1024; if (units) free(units); units = strdup ("MB"); break; case 'l': show_local_fs = 1; break; case 'p': /* select path */ se = np_add_parameter(&path_select_list, optarg); se->w_df = w_df; se->c_df = c_df; se->w_dfp = w_dfp; se->c_dfp = c_dfp; se->w_idfp = w_idfp; se->c_idfp = c_idfp; break; case 'x': /* exclude path or partition */ np_add_name(&dp_exclude_list, optarg); break; case 'X': /* exclude file system type */ np_add_name(&fs_exclude_list, optarg); break; case 'v': /* verbose */ verbose++; break; case 'q': /* verbose */ verbose--; break; case 'e': erronly = TRUE; break; case 'E': exact_match = TRUE; break; case 'M': /* display mountpoint */ display_mntp = TRUE; break; case 'C': w_df = 0; c_df = 0; w_dfp = -1.0; c_dfp = -1.0; w_idfp = -1.0; c_idfp = -1.0; break; case 'V': /* version */ print_revision (progname, revision); exit (STATE_OK); case 'h': /* help */ print_help (); exit (STATE_OK); case '?': /* help */ usage (_("Unknown argument")); } } /* Support for "check_disk warn crit [fs]" with thresholds at used level */ c = optind; if (w_dfp < 0 && argc > c && is_intnonneg (argv[c])) w_dfp = (100.0 - atof (argv[c++])); if (c_dfp < 0 && argc > c && is_intnonneg (argv[c])) c_dfp = (100.0 - atof (argv[c++])); if (argc > c && path == NULL) { se = np_add_parameter(&path_select_list, strdup(argv[c++])); se->w_df = w_df; se->c_df = c_df; se->w_dfp = w_dfp; se->c_dfp = c_dfp; se->w_idfp = w_idfp; se->c_idfp = c_idfp; } if (path_select_list) { temp_list = path_select_list; stat_buf = malloc(sizeof *stat_buf); while (temp_list) { /* Stat each entry to check that dir exists */ if (stat (temp_list->name, &stat_buf[0])) { printf("DISK %s - ", _("CRITICAL")); die (STATE_CRITICAL, _("%s does not exist\n"), temp_list->name); } if (validate_arguments (temp_list->w_df, temp_list->c_df, temp_list->w_dfp, temp_list->c_dfp, temp_list->w_idfp, temp_list->c_idfp, temp_list->name) == ERROR) result = ERROR; temp_list = temp_list->name_next; } free(stat_buf); return result; } else { return validate_arguments (w_df, c_df, w_dfp, c_dfp, w_idfp, c_idfp, NULL); } } void print_path (const char *mypath) { if (mypath == NULL) printf ("\n"); else printf (_(" for %s\n"), mypath); return; } int validate_arguments (uintmax_t w, uintmax_t c, double wp, double cp, double iwp, double icp, char *mypath) { if (w < 0 && c < 0 && wp < 0.0 && cp < 0.0) { printf (_("INPUT ERROR: No thresholds specified")); print_path (mypath); return ERROR; } else if ((wp >= 0.0 || cp >= 0.0) && (wp < 0.0 || cp < 0.0 || wp > 100.0 || cp > 100.0 || cp > wp)) { printf (_("\ INPUT ERROR: C_DFP (%f) should be less than W_DFP (%.1f) and both should be between zero and 100 percent, inclusive"), cp, wp); print_path (mypath); return ERROR; } else if ((iwp >= 0.0 || icp >= 0.0) && (iwp < 0.0 || icp < 0.0 || iwp > 100.0 || icp > 100.0 || icp > iwp)) { printf (_("\ INPUT ERROR: C_IDFP (%f) should be less than W_IDFP (%.1f) and both should be between zero and 100 percent, inclusive"), icp, iwp); print_path (mypath); return ERROR; } else if ((w > 0 || c > 0) && (w == 0 || c == 0 || c > w)) { printf (_("\ INPUT ERROR: C_DF (%lu) should be less than W_DF (%lu) and both should be greater than zero"), (unsigned long)c, (unsigned long)w); print_path (mypath); return ERROR; } if (units == NULL) { units = strdup ("MB"); mult = (uintmax_t)1024 * 1024; } return OK; } int check_disk (double usp, uintmax_t free_disk, double uisp) { int result = STATE_UNKNOWN; /* check the percent used space against thresholds */ if (usp >= 0.0 && c_dfp >=0.0 && usp >= (100.0 - c_dfp)) result = STATE_CRITICAL; else if (uisp >= 0.0 && c_idfp >=0.0 && uisp >= (100.0 - c_idfp)) result = STATE_CRITICAL; else if (c_df > 0 && free_disk <= c_df) result = STATE_CRITICAL; else if (usp >= 0.0 && w_dfp >=0.0 && usp >= (100.0 - w_dfp)) result = STATE_WARNING; else if (uisp >= 0.0 && w_idfp >=0.0 && uisp >= (100.0 - w_idfp)) 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) 1999 Ethan Galstad \n"); printf (COPYRIGHT, copyright, email); printf ("%s\n", _("This plugin checks the amount of used disk space on a mounted file system")); printf ("%s\n", _("and generates an alert if free space is less than one of the threshold values")); printf ("\n\n"); print_usage (); printf (_(UT_HELP_VRSN)); printf (" %s\n", "-w, --warning=INTEGER"); printf (" %s\n", _("Exit with WARNING status if less than INTEGER units of disk are free")); printf (" %s\n", "-w, --warning=PERCENT%"); printf (" %s\n", _("Exit with WARNING status if less than PERCENT of disk space is free")); printf (" %s\n", "-W, --iwarning=PERCENT%"); printf (" %s\n", _("Exit with WARNING status if less than PERCENT of inode space is free")); printf (" %s\n", "-K, --icritical=PERCENT%"); printf (" %s\n", _("Exit with CRITICAL status if less than PERCENT of inode space is free")); printf (" %s\n", "-c, --critical=INTEGER"); printf (" %s\n", _("Exit with CRITICAL status if less than INTEGER units of disk are free")); printf (" %s\n", "-c, --critical=PERCENT%"); printf (" %s\n", _("Exit with CRITCAL status if less than PERCENT of disk space is free")); printf (" %s\n", "-C, --clear"); printf (" %s\n", _("Clear thresholds")); printf (" %s\n", "-u, --units=STRING"); printf (" %s\n", _("Choose bytes, kB, MB, GB, TB (default: MB)")); printf (" %s\n", "-k, --kilobytes"); printf (" %s\n", _("Same as '--units kB'")); printf (" %s\n", "-m, --megabytes"); printf (" %s\n", _("Same as '--units MB'")); printf (" %s\n", "-l, --local"); printf (" %s\n", _("Only check local filesystems")); printf (" %s\n", "-p, --path=PATH, --partition=PARTITION"); printf (" %s\n", _("Path or partition (may be repeated)")); printf (" %s\n", "-x, --exclude_device=PATH "); printf (" %s\n", _("Ignore device (only works if -p unspecified)")); printf (" %s\n", _("-X, --exclude-type=TYPE ")); printf (" %s\n", _("Ignore all filesystems of indicated type (may be repeated)")); printf (" %s\n", "-m, --mountpoint"); printf (" %s\n", _("Display the mountpoint instead of the partition")); printf (" %s\n", "-E, --exact-match"); printf (" %s\n", _("For paths or partitions specified with -p, only check for exact paths")); printf (" %s\n", "-e, --errors-only"); printf (" %s\n", _("Display only devices/mountpoints with errors")); printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT); printf (_(UT_VERBOSE)); printf ("\n"); printf ("%s\n", _("Examples:")); printf (" %s\n", "check_disk -w 10% -c 5% -p /tmp -p /var -C -w 100000 -c 50000 -p /"); printf (" %s\n", _("Checks /tmp and /var at 10% and 5%, and / at 100MB and 50MB")); printf (_(UT_SUPPORT)); } void print_usage (void) { printf (_("Usage:")); printf (" %s -w limit -c limit [-p path | -x device] [-t timeout]", progname); printf ("[-m] [-e] [-W limit] [-K limit] [-v] [-q] [-E]\n"); }