plugins/check_disk.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_disk plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2008 Nagios Plugins Development Team
   7 *
   8 * Description:
   9 *
  10 * This file contains the check_disk plugin
  11 *
  12 *
  13 * This program is free software: you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License as published by
  15 * the Free Software Foundation, either version 3 of the License, or
  16 * (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25 *
  26 *
  27 *****************************************************************************/
  28
  29 const char *progname = "check_disk";
  30 const char *program_name = "check_disk";  /* Required for coreutils libs */
  31 const char *copyright = "1999-2008";
  32 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  33
  34
  35 #include "common.h"
  36 #ifdef HAVE_SYS_STAT_H
  37 # include <sys/stat.h>
  38 #endif
  39 #if HAVE_INTTYPES_H
  40 # include <inttypes.h>
  41 #endif
  42 #include <assert.h>
  43 #include "popen.h"
  44 #include "utils.h"
  45 #include "utils_disk.h"
  46 #include <stdarg.h>
  47 #include "fsusage.h"
  48 #include "mountlist.h"
  49 #include "intprops.h"   /* necessary for TYPE_MAXIMUM */
  50 #if HAVE_LIMITS_H
  51 # include <limits.h>
  52 #endif
  53 #include "regex.h"
  54
  55
  56 /* If nonzero, show inode information. */
  57 static int inode_format = 1;
  58
  59 /* If nonzero, show even filesystems with zero size or
  60    uninteresting types. */
  61 static int show_all_fs = 1;
  62
  63 /* If nonzero, show only local filesystems.  */
  64 static int show_local_fs = 0;
  65
  66 /* If nonzero, show only local filesystems but call stat() on remote ones. */
  67 static int stat_remote_fs = 0;
  68
  69 /* If positive, the units to use when printing sizes;
  70    if negative, the human-readable base.  */
  71 /* static int output_block_size; */
  72
  73 /* If nonzero, invoke the `sync' system call before getting any usage data.
  74    Using this option can make df very slow, especially with many or very
  75    busy disks.  Note that this may make a difference on some systems --
  76    SunOs4.1.3, for one.  It is *not* necessary on Linux.  */
  77 /* static int require_sync = 0; */
  78
  79 /* Linked list of filesystem types to display.
  80    If `fs_select_list' is NULL, list all types.
  81    This table is generated dynamically from command-line options,
  82    rather than hardcoding into the program what it thinks are the
  83    valid filesystem types; let the user specify any filesystem type
  84    they want to, and if there are any filesystems of that type, they
  85    will be shown.
  86
  87    Some filesystem types:
  88    4.2 4.3 ufs nfs swap ignore io vm efs dbg */
  89
  90 /* static struct parameter_list *fs_select_list; */
  91
  92 /* Linked list of filesystem types to omit.
  93    If the list is empty, don't exclude any types.  */
  94
  95 static struct name_list *fs_exclude_list;
  96
  97 static struct name_list *dp_exclude_list;
  98
  99 static struct parameter_list *path_select_list = NULL;
 100
 101 /* Linked list of mounted filesystems. */
 102 static struct mount_entry *mount_list;
 103
 104 /* For long options that have no equivalent short option, use a
 105    non-character as a pseudo short option, starting with CHAR_MAX + 1.  */
 106 enum
 107 {
 108   SYNC_OPTION = CHAR_MAX + 1,
 109   NO_SYNC_OPTION,
 110   BLOCK_SIZE_OPTION
 111 };
 112
 113 #ifdef _AIX
 114  #pragma alloca
 115 #endif
 116
 117 int process_arguments (int, char **);
 118 void print_path (const char *mypath);
 119 void set_all_thresholds (struct parameter_list *path);
 120 int validate_arguments (uintmax_t, uintmax_t, double, double, double, double, char *);
 121 void print_help (void);
 122 void print_usage (void);
 123 double calculate_percent(uintmax_t, uintmax_t);
 124 void stat_path (struct parameter_list *p);
 125
 126 double w_dfp = -1.0;
 127 double c_dfp = -1.0;
 128 char *path;
 129 char *exclude_device;
 130 char *units;
 131 uintmax_t mult = 1024 * 1024;
 132 int verbose = 0;
 133 int erronly = FALSE;
 134 int display_mntp = FALSE;
 135 int exact_match = FALSE;
 136 char *warn_freespace_units = NULL;
 137 char *crit_freespace_units = NULL;
 138 char *warn_freespace_percent = NULL;
 139 char *crit_freespace_percent = NULL;
 140 char *warn_usedspace_units = NULL;
 141 char *crit_usedspace_units = NULL;
 142 char *warn_usedspace_percent = NULL;
 143 char *crit_usedspace_percent = NULL;
 144 char *warn_usedinodes_percent = NULL;
 145 char *crit_usedinodes_percent = NULL;
 146 char *warn_freeinodes_percent = NULL;
 147 char *crit_freeinodes_percent = NULL;
 148 int path_selected = FALSE;
 149 char *group = NULL;
 150 struct stat *stat_buf;
 151
 152
 153 int
 154 main (int argc, char **argv)
 155 {
 156   int result = STATE_UNKNOWN;
 157   int disk_result = STATE_UNKNOWN;
 158   char *output;
 159   char *details;
 160   char *perf;
 161   char *preamble;
 162   double inode_space_pct;
 163   uintmax_t total, available, available_to_root, used;
 164   double dfree_pct = -1, dused_pct = -1;
 165   double dused_units, dfree_units, dtotal_units;
 166   double dused_inodes_percent, dfree_inodes_percent;
 167   double warning_high_tide;
 168   double critical_high_tide;
 169   int temp_result;
 170
 171   struct mount_entry *me;
 172   struct fs_usage fsp, tmpfsp;
 173   struct parameter_list *temp_list, *path;
 174   struct name_list *seen = NULL;
 175
 176   preamble = strdup (" - free space:");
 177   output = strdup ("");
 178   details = strdup ("");
 179   perf = strdup ("");
 180   stat_buf = malloc(sizeof *stat_buf);
 181
 182   setlocale (LC_ALL, "");
 183   bindtextdomain (PACKAGE, LOCALEDIR);
 184   textdomain (PACKAGE);
 185
 186   mount_list = read_file_system_list (0);
 187
 188   /* Parse extra opts if any */
 189   argv = np_extra_opts (&argc, argv, progname);
 190
 191   if (process_arguments (argc, argv) == ERROR)
 192     usage4 (_("Could not parse arguments"));
 193
 194   /* If a list of paths has not been selected, find entire
 195      mount list and create list of paths
 196    */
 197   if (path_selected == FALSE) {
 198     for (me = mount_list; me; me = me->me_next) {
 199       if (! (path = np_find_parameter(path_select_list, me->me_mountdir))) {
 200         path = np_add_parameter(&path_select_list, me->me_mountdir);
 201       }
 202       path->best_match = me;
 203       path->group = group;
 204       set_all_thresholds(path);
 205     }
 206   }
 207   np_set_best_match(path_select_list, mount_list, exact_match);
 208
 209   /* Error if no match found for specified paths */
 210   temp_list = path_select_list;
 211
 212   while (temp_list) {
 213     if (! temp_list->best_match) {
 214       die (STATE_CRITICAL, _("DISK %s: %s not found\n"), _("CRITICAL"), temp_list->name);
 215     }
 216
 217     temp_list = temp_list->name_next;
 218   }
 219
 220   /* Process for every path in list */
 221   for (path = path_select_list; path; path=path->name_next) {
 222
 223     if (verbose >= 3 && path->freespace_percent->warning != NULL && path->freespace_percent->critical != NULL)
 224       printf("Thresholds(pct) for %s warn: %f crit %f\n",path->name, path->freespace_percent->warning->end,
 225                                                          path->freespace_percent->critical->end);
 226
 227     if (verbose >= 3 && path->group != NULL)
 228       printf("Group of %s: %s\n",path->name,path->group);
 229
 230     /* reset disk result */
 231     disk_result = STATE_UNKNOWN;
 232
 233     me = path->best_match;
 234
 235     /* Filters */
 236
 237     /* Remove filesystems already seen */
 238     if (np_seen_name(seen, me->me_mountdir)) {
 239       continue;
 240     } else {
 241       if (path->group != NULL) {
 242         /* find all group members */
 243         fsp.fsu_blocksize = 0;
 244         fsp.fsu_blocks    = 0;
 245         fsp.fsu_bfree     = 0;
 246         fsp.fsu_bavail    = 0;
 247         fsp.fsu_files     = 0;
 248         fsp.fsu_ffree     = 0;
 249
 250
 251         for (temp_list = path_select_list; temp_list; temp_list=temp_list->name_next) {
 252           if (temp_list->group && ! (strcmp(temp_list->group, path->group))) {
 253
 254             stat_path(path);
 255             get_fs_usage (temp_list->best_match->me_mountdir, temp_list->best_match->me_devname, &tmpfsp);
 256
 257             /* possibly differing blocksizes if disks are grouped. Calculating average */
 258             fsp.fsu_blocksize = (fsp.fsu_blocksize * fsp.fsu_blocks + tmpfsp.fsu_blocksize * tmpfsp.fsu_blocks) / \
 259                                 (fsp.fsu_blocks + tmpfsp.fsu_blocks);  /* Size of a block.  */
 260             fsp.fsu_blocks    += tmpfsp.fsu_blocks;     /* Total blocks. */
 261             fsp.fsu_bfree     += tmpfsp.fsu_bfree;      /* Free blocks available to superuser. */
 262             /* Gnulib workaround - see comment about it a few lines below */
 263             fsp.fsu_bavail    += (tmpfsp.fsu_bavail > tmpfsp.fsu_bfree ? 0 : tmpfsp.fsu_bavail); /* Free blocks available to non-superuser. */
 264             fsp.fsu_files     += tmpfsp.fsu_files;      /* Total file nodes. */
 265             fsp.fsu_ffree     += tmpfsp.fsu_ffree;      /* Free file nodes. */
 266
 267             if (verbose >= 3)
 268               printf("Group %s: add %llu blocks (%s) \n", path->group, tmpfsp.fsu_bavail, temp_list->name);
 269              /* printf("Group %s: add %u blocks (%s)\n", temp_list->name); *//* path->group, tmpfsp.fsu_bavail, temp_list->name); */
 270
 271             np_add_name(&seen, temp_list->best_match->me_mountdir);
 272           }
 273         }
 274         /* modify devname and mountdir for output */
 275         me->me_mountdir = me->me_devname = path->group;
 276       } else
 277         np_add_name(&seen, me->me_mountdir);
 278     }
 279
 280     if (path->group == NULL) {
 281       /* Skip remote filesystems if we're not interested in them */
 282       if (me->me_remote && show_local_fs) {
 283         if (stat_remote_fs)
 284           stat_path(path);
 285         continue;
 286       /* Skip pseudo fs's if we haven't asked for all fs's */
 287       } else if (me->me_dummy && !show_all_fs) {
 288         continue;
 289       /* Skip excluded fstypes */
 290       } else if (fs_exclude_list && np_find_name (fs_exclude_list, me->me_type)) {
 291         continue;
 292       /* Skip excluded fs's */
 293       } else if (dp_exclude_list &&
 294                (np_find_name (dp_exclude_list, me->me_devname) ||
 295                 np_find_name (dp_exclude_list, me->me_mountdir))) {
 296         continue;
 297       }
 298
 299       stat_path(path);
 300       get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
 301     }
 302
 303     if (fsp.fsu_blocks && strcmp ("none", me->me_mountdir)) {
 304       total = fsp.fsu_blocks;
 305       /* 2007-12-08 - Workaround for Gnulib reporting insanely high available
 306        * space on BSD (the actual value should be negative but fsp.fsu_bavail
 307        * is unsigned) */
 308       available = fsp.fsu_bavail > fsp.fsu_bfree ? 0 : fsp.fsu_bavail;
 309       available_to_root = fsp.fsu_bfree;
 310       used = total - available_to_root;
 311
 312       if (verbose >= 3)
 313         printf ("For %s, total=%llu, available=%llu, available_to_root=%llu, used=%llu, fsp.fsu_files=%llu, fsp.fsu_ffree=%llu\n",
 314         me->me_mountdir, total, available, available_to_root, used, fsp.fsu_files, fsp.fsu_ffree);
 315
 316       dused_pct = calculate_percent( used, used + available );  /* used + available can never be > uintmax */
 317
 318       dfree_pct = 100 - dused_pct;
 319       dused_units = used*fsp.fsu_blocksize/mult;
 320       dfree_units = available*fsp.fsu_blocksize/mult;
 321       dtotal_units = total*fsp.fsu_blocksize/mult;
 322       dused_inodes_percent = calculate_percent(fsp.fsu_files - fsp.fsu_ffree, fsp.fsu_files);
 323       dfree_inodes_percent = 100 - dused_inodes_percent;
 324
 325       if (verbose >= 3) {
 326         printf ("For %s, used_pct=%g free_pct=%g used_units=%g free_units=%g total_units=%g used_inodes_pct=%g free_inodes_pct=%g fsp.fsu_blocksize=%llu mult=%llu\n",
 327           me->me_mountdir, dused_pct, dfree_pct, dused_units, dfree_units, dtotal_units, dused_inodes_percent, dfree_inodes_percent, fsp.fsu_blocksize, mult);
 328       }
 329
 330       /* Threshold comparisons */
 331
 332       temp_result = get_status(dfree_units, path->freespace_units);
 333       if (verbose >=3) printf("Freespace_units result=%d\n", temp_result);
 334       disk_result = max_state( disk_result, temp_result );
 335
 336       temp_result = get_status(dfree_pct, path->freespace_percent);
 337       if (verbose >=3) printf("Freespace%% result=%d\n", temp_result);
 338       disk_result = max_state( disk_result, temp_result );
 339
 340       temp_result = get_status(dused_units, path->usedspace_units);
 341       if (verbose >=3) printf("Usedspace_units result=%d\n", temp_result);
 342       disk_result = max_state( disk_result, temp_result );
 343
 344       temp_result = get_status(dused_pct, path->usedspace_percent);
 345       if (verbose >=3) printf("Usedspace_percent result=%d\n", temp_result);
 346       disk_result = max_state( disk_result, temp_result );
 347
 348       temp_result = get_status(dused_inodes_percent, path->usedinodes_percent);
 349       if (verbose >=3) printf("Usedinodes_percent result=%d\n", temp_result);
 350       disk_result = max_state( disk_result, temp_result );
 351
 352       temp_result = get_status(dfree_inodes_percent, path->freeinodes_percent);
 353       if (verbose >=3) printf("Freeinodes_percent result=%d\n", temp_result);
 354       disk_result = max_state( disk_result, temp_result );
 355
 356       result = max_state(result, disk_result);
 357
 358       /* What a mess of units. The output shows free space, the perf data shows used space. Yikes!
 359          Hack here. Trying to get warn/crit levels from freespace_(units|percent) for perf
 360          data. Assumption that start=0. Roll on new syntax...
 361       */
 362
 363       /* *_high_tide must be reinitialized at each run */
 364       warning_high_tide = UINT_MAX;
 365       critical_high_tide = UINT_MAX;
 366
 367       if (path->freespace_units->warning != NULL) {
 368         warning_high_tide = dtotal_units - path->freespace_units->warning->end;
 369       }
 370       if (path->freespace_percent->warning != NULL) {
 371         warning_high_tide = abs( min( (double) warning_high_tide, (double) (1.0 - path->freespace_percent->warning->end/100)*dtotal_units ));
 372       }
 373       if (path->freespace_units->critical != NULL) {
 374         critical_high_tide = dtotal_units - path->freespace_units->critical->end;
 375       }
 376       if (path->freespace_percent->critical != NULL) {
 377         critical_high_tide = abs( min( (double) critical_high_tide, (double) (1.0 - path->freespace_percent->critical->end/100)*dtotal_units ));
 378       }
 379
 380       /* Nb: *_high_tide are unset when == UINT_MAX */
 381       asprintf (&perf, "%s %s", perf,
 382                 perfdata ((!strcmp(me->me_mountdir, "none") || display_mntp) ? me->me_devname : me->me_mountdir,
 383                           dused_units, units,
 384                           (warning_high_tide != UINT_MAX ? TRUE : FALSE), warning_high_tide,
 385                           (critical_high_tide != UINT_MAX ? TRUE : FALSE), critical_high_tide,
 386                           TRUE, 0,
 387                           TRUE, dtotal_units));
 388
 389       if (disk_result==STATE_OK && erronly && !verbose)
 390         continue;
 391
 392       asprintf (&output, "%s %s %.0f %s (%.0f%%",
 393                 output,
 394                 (!strcmp(me->me_mountdir, "none") || display_mntp) ? me->me_devname : me->me_mountdir,
 395                 dfree_units,
 396                 units,
 397                 dfree_pct);
 398       if (dused_inodes_percent < 0) {
 399         asprintf(&output, "%s inode=-);", output);
 400       } else {
 401         asprintf(&output, "%s inode=%.0f%%);", output, dfree_inodes_percent );
 402       }
 403
 404       /* TODO: Need to do a similar debug line
 405       asprintf (&details, _("%s\n\
 406 %.0f of %.0f %s (%.0f%% inode=%.0f%%) free on %s (type %s mounted on %s) warn:%lu crit:%lu warn%%:%.0f%% crit%%:%.0f%%"),
 407                 details, dfree_units, dtotal_units, units, dfree_pct, inode_space_pct,
 408                 me->me_devname, me->me_type, me->me_mountdir,
 409                 (unsigned long)w_df, (unsigned long)c_df, w_dfp, c_dfp);
 410       */
 411
 412     }
 413
 414   }
 415
 416   if (verbose >= 2)
 417     asprintf (&output, "%s%s", output, details);
 418
 419
 420   printf ("DISK %s%s%s|%s\n", state_text (result), (erronly && result==STATE_OK) ? "" : preamble, output, perf);
 421   return result;
 422 }
 423
 424
 425 double calculate_percent(uintmax_t value, uintmax_t total) {
 426   double pct = -1;
 427   /* I don't understand the below, but it is taken from coreutils' df */
 428   /* Seems to be calculating pct, in the best possible way */
 429   if (value <= TYPE_MAXIMUM(uintmax_t) / 100
 430     && total != 0) {
 431     uintmax_t u100 = value * 100;
 432     pct = u100 / total + (u100 % total != 0);
 433   } else {
 434     /* Possible rounding errors - see coreutils' df for more explanation */
 435     double u = value;
 436     double t = total;
 437     if (t) {
 438       long int lipct = pct = u * 100 / t;
 439       double ipct = lipct;
 440
 441       /* Like 'pct = ceil (dpct);', but without ceil - from coreutils again */
 442       if (ipct - 1 < pct && pct <= ipct + 1)
 443         pct = ipct + (ipct < pct);
 444     }
 445   }
 446   return pct;
 447 }
 448
 449 /* process command-line arguments */
 450 int
 451 process_arguments (int argc, char **argv)
 452 {
 453   int c, err;
 454   struct parameter_list *se;
 455   struct parameter_list *temp_list = NULL, *previous = NULL;
 456   struct parameter_list *temp_path_select_list = NULL;
 457   struct mount_entry *me, *temp_me;
 458   int result = OK;
 459   regex_t re;
 460   int cflags = REG_NOSUB | REG_EXTENDED;
 461   int default_cflags = cflags;
 462   char errbuf[MAX_INPUT_BUFFER];
 463   int fnd = 0;
 464
 465   int option = 0;
 466   static struct option longopts[] = {
 467     {"timeout", required_argument, 0, 't'},
 468     {"warning", required_argument, 0, 'w'},
 469     {"critical", required_argument, 0, 'c'},
 470     {"iwarning", required_argument, 0, 'W'},
 471     /* Dang, -C is taken. We might want to reshuffle this. */
 472     {"icritical", required_argument, 0, 'K'},
 473     {"kilobytes", no_argument, 0, 'k'},
 474     {"megabytes", no_argument, 0, 'm'},
 475     {"units", required_argument, 0, 'u'},
 476     {"path", required_argument, 0, 'p'},
 477     {"partition", required_argument, 0, 'p'},
 478     {"exclude_device", required_argument, 0, 'x'},
 479     {"exclude-type", required_argument, 0, 'X'},
 480     {"group", required_argument, 0, 'g'},
 481     {"eregi-path", required_argument, 0, 'R'},
 482     {"eregi-partition", required_argument, 0, 'R'},
 483     {"ereg-path", required_argument, 0, 'r'},
 484     {"ereg-partition", required_argument, 0, 'r'},
 485     {"ignore-ereg-path", required_argument, 0, 'i'},
 486     {"ignore-ereg-partition", required_argument, 0, 'i'},
 487     {"ignore-eregi-path", required_argument, 0, 'I'},
 488     {"ignore-eregi-partition", required_argument, 0, 'I'},
 489     {"local", no_argument, 0, 'l'},
 490     {"stat-remote-fs", no_argument, 0, 'L'},
 491     {"mountpoint", no_argument, 0, 'M'},
 492     {"errors-only", no_argument, 0, 'e'},
 493     {"exact-match", no_argument, 0, 'E'},
 494     {"all", no_argument, 0, 'A'},
 495     {"verbose", no_argument, 0, 'v'},
 496     {"quiet", no_argument, 0, 'q'},
 497     {"clear", no_argument, 0, 'C'},
 498     {"version", no_argument, 0, 'V'},
 499     {"help", no_argument, 0, 'h'},
 500     {0, 0, 0, 0}
 501   };
 502
 503   if (argc < 2)
 504     return ERROR;
 505
 506   np_add_name(&fs_exclude_list, "iso9660");
 507
 508   for (c = 1; c < argc; c++)
 509     if (strcmp ("-to", argv[c]) == 0)
 510       strcpy (argv[c], "-t");
 511
 512   while (1) {
 513     c = getopt_long (argc, argv, "+?VqhveCt:c:w:K:W:u:p:x:X:mklLg:R:r:i:I:MEA", longopts, &option);
 514
 515     if (c == -1 || c == EOF)
 516       break;
 517
 518     switch (c) {
 519     case 't':                 /* timeout period */
 520       if (is_integer (optarg)) {
 521         timeout_interval = atoi (optarg);
 522         break;
 523       }
 524       else {
 525         usage2 (_("Timeout interval must be a positive integer"), optarg);
 526       }
 527
 528     /* See comments for 'c' */
 529     case 'w':                 /* warning threshold */
 530       if (strstr(optarg, "%")) {
 531         if (*optarg == '@') {
 532           warn_freespace_percent = optarg;
 533         } else {
 534           asprintf(&warn_freespace_percent, "@%s", optarg);
 535         }
 536       } else {
 537         if (*optarg == '@') {
 538           warn_freespace_units = optarg;
 539         } else {
 540           asprintf(&warn_freespace_units, "@%s", optarg);
 541         }
 542       }
 543       break;
 544
 545     /* Awful mistake where the range values do not make sense. Normally,
 546        you alert if the value is within the range, but since we are using
 547        freespace, we have to alert if outside the range. Thus we artifically
 548        force @ at the beginning of the range, so that it is backwards compatible
 549     */
 550     case 'c':                 /* critical threshold */
 551       if (strstr(optarg, "%")) {
 552         if (*optarg == '@') {
 553           crit_freespace_percent = optarg;
 554         } else {
 555           asprintf(&crit_freespace_percent, "@%s", optarg);
 556         }
 557       } else {
 558         if (*optarg == '@') {
 559           crit_freespace_units = optarg;
 560         } else {
 561           asprintf(&crit_freespace_units, "@%s", optarg);
 562         }
 563       }
 564       break;
 565
 566     case 'W':                   /* warning inode threshold */
 567       if (*optarg == '@') {
 568         warn_freeinodes_percent = optarg;
 569       } else {
 570         asprintf(&warn_freeinodes_percent, "@%s", optarg);
 571       }
 572       break;
 573     case 'K':                   /* critical inode threshold */
 574       if (*optarg == '@') {
 575         crit_freeinodes_percent = optarg;
 576       } else {
 577         asprintf(&crit_freeinodes_percent, "@%s", optarg);
 578       }
 579       break;
 580     case 'u':
 581       if (units)
 582         free(units);
 583       if (! strcmp (optarg, "bytes")) {
 584         mult = (uintmax_t)1;
 585         units = strdup ("B");
 586       } else if (! strcmp (optarg, "kB")) {
 587         mult = (uintmax_t)1024;
 588         units = strdup ("kB");
 589       } else if (! strcmp (optarg, "MB")) {
 590         mult = (uintmax_t)1024 * 1024;
 591         units = strdup ("MB");
 592       } else if (! strcmp (optarg, "GB")) {
 593         mult = (uintmax_t)1024 * 1024 * 1024;
 594         units = strdup ("GB");
 595       } else if (! strcmp (optarg, "TB")) {
 596         mult = (uintmax_t)1024 * 1024 * 1024 * 1024;
 597         units = strdup ("TB");
 598       } else {
 599         die (STATE_UNKNOWN, _("unit type %s not known\n"), optarg);
 600       }
 601       if (units == NULL)
 602         die (STATE_UNKNOWN, _("failed allocating storage for '%s'\n"), "units");
 603       break;
 604     case 'k': /* display mountpoint */
 605       mult = 1024;
 606       if (units)
 607         free(units);
 608       units = strdup ("kB");
 609       break;
 610     case 'm': /* display mountpoint */
 611       mult = 1024 * 1024;
 612       if (units)
 613         free(units);
 614       units = strdup ("MB");
 615       break;
 616     case 'L':
 617       stat_remote_fs = 1;
 618     case 'l':
 619       show_local_fs = 1;
 620       break;
 621     case 'p':                 /* select path */
 622       if (! (warn_freespace_units || crit_freespace_units || warn_freespace_percent ||
 623              crit_freespace_percent || warn_usedspace_units || crit_usedspace_units ||
 624              warn_usedspace_percent || crit_usedspace_percent || warn_usedinodes_percent ||
 625              crit_usedinodes_percent || warn_freeinodes_percent || crit_freeinodes_percent )) {
 626         die (STATE_UNKNOWN, "DISK %s: %s", _("UNKNOWN"), _("Must set a threshold value before using -p\n"));
 627       }
 628
 629       /* add parameter if not found. overwrite thresholds if path has already been added  */
 630       if (! (se = np_find_parameter(path_select_list, optarg))) {
 631           se = np_add_parameter(&path_select_list, optarg);
 632       }
 633       se->group = group;
 634       set_all_thresholds(se);
 635
 636       /* With autofs, it is required to stat() the path before re-populating the mount_list */
 637       stat_path(se);
 638       /* NB: We can't free the old mount_list "just like that": both list pointers and struct
 639        * pointers are copied around. One of the reason it wasn't done yet is that other parts
 640        * of check_disk need the same kind of cleanup so it'd better be done as a whole */
 641       mount_list = read_file_system_list (0);
 642       np_set_best_match(se, mount_list, exact_match);
 643
 644       path_selected = TRUE;
 645       break;
 646     case 'x':                 /* exclude path or partition */
 647       np_add_name(&dp_exclude_list, optarg);
 648       break;
 649     case 'X':                 /* exclude file system type */
 650       np_add_name(&fs_exclude_list, optarg);
 651       break;
 652     case 'v':                 /* verbose */
 653       verbose++;
 654       break;
 655     case 'q':                 /* TODO: this function should eventually go away (removed 2007-09-20) */
 656       /* verbose--; **replaced by line below**. -q was only a broken way of implementing -e */
 657       erronly = TRUE;
 658       break;
 659     case 'e':
 660       erronly = TRUE;
 661       break;
 662     case 'E':
 663       if (path_selected)
 664         die (STATE_UNKNOWN, "DISK %s: %s", _("UNKNOWN"), _("Must set -E before selecting paths\n"));
 665       exact_match = TRUE;
 666       break;
 667     case 'g':
 668       if (path_selected)
 669         die (STATE_UNKNOWN, "DISK %s: %s", _("UNKNOWN"), _("Must set group value before selecting paths\n"));
 670       group = optarg;
 671       break;
 672     case 'I':
 673       cflags |= REG_ICASE;
 674     case 'i':
 675       if (!path_selected)
 676         die (STATE_UNKNOWN, "DISK %s: %s\n", _("UNKNOWN"), _("Paths need to be selected before using -i/-I. Use -A to select all paths explicitly"));
 677       err = regcomp(&re, optarg, cflags);
 678       if (err != 0) {
 679         regerror (err, &re, errbuf, MAX_INPUT_BUFFER);
 680         die (STATE_UNKNOWN, "DISK %s: %s - %s\n",_("UNKNOWN"), _("Could not compile regular expression"), errbuf);
 681       }
 682
 683       temp_list = path_select_list;
 684
 685       previous = NULL;
 686       while (temp_list) {
 687         if (temp_list->best_match) {
 688           if (np_regex_match_mount_entry(temp_list->best_match, &re)) {
 689
 690               if (verbose >=3)
 691                 printf("ignoring %s matching regex\n", temp_list->name);
 692
 693               temp_list = np_del_parameter(temp_list, previous);
 694               /* pointer to first element needs to be updated if first item gets deleted */
 695               if (previous == NULL)
 696                 path_select_list = temp_list;
 697           } else {
 698             previous = temp_list;
 699             temp_list = temp_list->name_next;
 700           }
 701         } else {
 702           previous = temp_list;
 703           temp_list = temp_list->name_next;
 704         }
 705       }
 706
 707
 708       cflags = default_cflags;
 709       break;
 710
 711     case 'A':
 712       optarg = strdup(".*");
 713     case 'R':
 714       cflags |= REG_ICASE;
 715     case 'r':
 716       if (! (warn_freespace_units || crit_freespace_units || warn_freespace_percent ||
 717              crit_freespace_percent || warn_usedspace_units || crit_usedspace_units ||
 718              warn_usedspace_percent || crit_usedspace_percent || warn_usedinodes_percent ||
 719              crit_usedinodes_percent || warn_freeinodes_percent || crit_freeinodes_percent )) {
 720         die (STATE_UNKNOWN, "DISK %s: %s", _("UNKNOWN"), _("Must set a threshold value before using -r/-R\n"));
 721       }
 722
 723       err = regcomp(&re, optarg, cflags);
 724       if (err != 0) {
 725         regerror (err, &re, errbuf, MAX_INPUT_BUFFER);
 726         die (STATE_UNKNOWN, "DISK %s: %s - %s\n",_("UNKNOWN"), _("Could not compile regular expression"), errbuf);
 727       }
 728
 729       for (me = mount_list; me; me = me->me_next) {
 730         if (np_regex_match_mount_entry(me, &re)) {
 731           fnd = TRUE;
 732           if (verbose >= 3)
 733             printf("%s %s matching expression %s\n", me->me_devname, me->me_mountdir, optarg);
 734
 735           /* add parameter if not found. overwrite thresholds if path has already been added  */
 736           if (! (se = np_find_parameter(path_select_list, me->me_mountdir))) {
 737             se = np_add_parameter(&path_select_list, me->me_mountdir);
 738           }
 739           se->group = group;
 740           set_all_thresholds(se);
 741         }
 742       }
 743
 744       if (!fnd)
 745         die (STATE_UNKNOWN, "DISK %s: %s - %s\n",_("UNKNOWN"),
 746             _("Regular expression did not match any path or disk"), optarg);
 747
 748       fnd = FALSE;
 749       path_selected = TRUE;
 750       np_set_best_match(path_select_list, mount_list, exact_match);
 751       cflags = default_cflags;
 752
 753       break;
 754     case 'M': /* display mountpoint */
 755       display_mntp = TRUE;
 756       break;
 757     case 'C':
 758        /* add all mount entries to path_select list if no partitions have been explicitly defined using -p */
 759        if (path_selected == FALSE) {
 760          struct parameter_list *path;
 761          for (me = mount_list; me; me = me->me_next) {
 762            if (! (path = np_find_parameter(path_select_list, me->me_mountdir)))
 763              path = np_add_parameter(&path_select_list, me->me_mountdir);
 764            path->best_match = me;
 765            path->group = group;
 766            set_all_thresholds(path);
 767          }
 768       }
 769       warn_freespace_units = NULL;
 770       crit_freespace_units = NULL;
 771       warn_usedspace_units = NULL;
 772       crit_usedspace_units = NULL;
 773       warn_freespace_percent = NULL;
 774       crit_freespace_percent = NULL;
 775       warn_usedspace_percent = NULL;
 776       crit_usedspace_percent = NULL;
 777       warn_usedinodes_percent = NULL;
 778       crit_usedinodes_percent = NULL;
 779       warn_freeinodes_percent = NULL;
 780       crit_freeinodes_percent = NULL;
 781
 782       path_selected = FALSE;
 783       group = NULL;
 784       break;
 785     case 'V':                 /* version */
 786       print_revision (progname, NP_VERSION);
 787       exit (STATE_OK);
 788     case 'h':                 /* help */
 789       print_help ();
 790       exit (STATE_OK);
 791     case '?':                 /* help */
 792       usage (_("Unknown argument"));
 793     }
 794   }
 795
 796   /* Support for "check_disk warn crit [fs]" with thresholds at used% level */
 797   c = optind;
 798   if (warn_usedspace_percent == NULL && argc > c && is_intnonneg (argv[c]))
 799     warn_usedspace_percent = argv[c++];
 800
 801   if (crit_usedspace_percent == NULL && argc > c && is_intnonneg (argv[c]))
 802     crit_usedspace_percent = argv[c++];
 803
 804   if (argc > c && path == NULL) {
 805     se = np_add_parameter(&path_select_list, strdup(argv[c++]));
 806     path_selected = TRUE;
 807     set_all_thresholds(se);
 808   }
 809
 810   if (units == NULL) {
 811     units = strdup ("MB");
 812     mult = (uintmax_t)1024 * 1024;
 813   }
 814
 815   return TRUE;
 816 }
 817
 818
 819
 820 void
 821 print_path (const char *mypath)
 822 {
 823   if (mypath == NULL)
 824     printf ("\n");
 825   else
 826     printf (_(" for %s\n"), mypath);
 827 }
 828
 829
 830 void
 831 set_all_thresholds (struct parameter_list *path)
 832 {
 833     if (path->freespace_units != NULL) free(path->freespace_units);
 834     set_thresholds(&path->freespace_units, warn_freespace_units, crit_freespace_units);
 835     if (path->freespace_percent != NULL) free (path->freespace_percent);
 836     set_thresholds(&path->freespace_percent, warn_freespace_percent, crit_freespace_percent);
 837     if (path->usedspace_units != NULL) free (path->usedspace_units);
 838     set_thresholds(&path->usedspace_units, warn_usedspace_units, crit_usedspace_units);
 839     if (path->usedspace_percent != NULL) free (path->usedspace_percent);
 840     set_thresholds(&path->usedspace_percent, warn_usedspace_percent, crit_usedspace_percent);
 841     if (path->usedinodes_percent != NULL) free (path->usedinodes_percent);
 842     set_thresholds(&path->usedinodes_percent, warn_usedinodes_percent, crit_usedinodes_percent);
 843     if (path->freeinodes_percent != NULL) free (path->freeinodes_percent);
 844     set_thresholds(&path->freeinodes_percent, warn_freeinodes_percent, crit_freeinodes_percent);
 845 }
 846
 847 /* TODO: Remove?
 848
 849 int
 850 validate_arguments (uintmax_t w, uintmax_t c, double wp, double cp, double iwp, double icp, char *mypath)
 851 {
 852   if (w < 0 && c < 0 && wp < 0.0 && cp < 0.0) {
 853     printf (_("INPUT ERROR: No thresholds specified"));
 854     print_path (mypath);
 855     return ERROR;
 856   }
 857   else if ((wp >= 0.0 || cp >= 0.0) &&
 858            (wp < 0.0 || cp < 0.0 || wp > 100.0 || cp > 100.0 || cp > wp)) {
 859     printf (_("\
 860 INPUT ERROR: C_DFP (%f) should be less than W_DFP (%.1f) and both should be between zero and 100 percent, inclusive"),
 861             cp, wp);
 862     print_path (mypath);
 863     return ERROR;
 864   }
 865   else if ((iwp >= 0.0 || icp >= 0.0) &&
 866            (iwp < 0.0 || icp < 0.0 || iwp > 100.0 || icp > 100.0 || icp > iwp)) {
 867     printf (_("\
 868 INPUT ERROR: C_IDFP (%f) should be less than W_IDFP (%.1f) and both should be between zero and 100 percent, inclusive"),
 869             icp, iwp);
 870     print_path (mypath);
 871     return ERROR;
 872   }
 873   else if ((w > 0 || c > 0) && (w == 0 || c == 0 || c > w)) {
 874     printf (_("\
 875 INPUT ERROR: C_DF (%lu) should be less than W_DF (%lu) and both should be greater than zero"),
 876             (unsigned long)c, (unsigned long)w);
 877     print_path (mypath);
 878     return ERROR;
 879   }
 880
 881   return OK;
 882 }
 883
 884 */
 885
 886
 887
 888
 889
 890
 891
 892 void
 893 print_help (void)
 894 {
 895   print_revision (progname, NP_VERSION);
 896
 897   printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 898   printf (COPYRIGHT, copyright, email);
 899
 900   printf ("%s\n", _("This plugin checks the amount of used disk space on a mounted file system"));
 901   printf ("%s\n", _("and generates an alert if free space is less than one of the threshold values"));
 902
 903   printf ("\n\n");
 904
 905   print_usage ();
 906
 907   printf (_(UT_HELP_VRSN));
 908   printf (_(UT_EXTRA_OPTS));
 909
 910   printf (" %s\n", "-w, --warning=INTEGER");
 911   printf ("    %s\n", _("Exit with WARNING status if less than INTEGER units of disk are free"));
 912   printf (" %s\n", "-w, --warning=PERCENT%");
 913   printf ("    %s\n", _("Exit with WARNING status if less than PERCENT of disk space is free"));
 914   printf (" %s\n", "-c, --critical=INTEGER");
 915   printf ("    %s\n", _("Exit with CRITICAL status if less than INTEGER units of disk are free"));
 916   printf (" %s\n", "-c, --critical=PERCENT%");
 917   printf ("    %s\n", _("Exit with CRITCAL status if less than PERCENT of disk space is free"));
 918   printf (" %s\n", "-W, --iwarning=PERCENT%");
 919   printf ("    %s\n", _("Exit with WARNING status if less than PERCENT of inode space is free"));
 920   printf (" %s\n", "-K, --icritical=PERCENT%");
 921   printf ("    %s\n", _("Exit with CRITICAL status if less than PERCENT of inode space is free"));
 922   printf (" %s\n", "-p, --path=PATH, --partition=PARTITION");
 923   printf ("    %s\n", _("Path or partition (may be repeated)"));
 924   printf (" %s\n", "-x, --exclude_device=PATH <STRING>");
 925   printf ("    %s\n", _("Ignore device (only works if -p unspecified)"));
 926   printf (" %s\n", "-C, --clear");
 927   printf ("    %s\n", _("Clear thresholds"));
 928   printf (" %s\n", "-E, --exact-match");
 929   printf ("    %s\n", _("For paths or partitions specified with -p, only check for exact paths"));
 930   printf (" %s\n", "-e, --errors-only");
 931   printf ("    %s\n", _("Display only devices/mountpoints with errors"));
 932   printf (" %s\n", "-g, --group=NAME");
 933   printf ("    %s\n", _("Group paths. Thresholds apply to (free-)space of all partitions together"));
 934   printf (" %s\n", "-k, --kilobytes");
 935   printf ("    %s\n", _("Same as '--units kB'"));
 936   printf (" %s\n", "-l, --local");
 937   printf ("    %s\n", _("Only check local filesystems"));
 938   printf (" %s\n", "-L, --stat-remote-fs");
 939   printf ("    %s\n", _("Only check local filesystems against thresholds. Yet call stat on remote filesystems"));
 940   printf ("    %s\n", _("to test if they are accessible (e.g. to detect Stale NFS Handles)"));
 941   printf (" %s\n", "-M, --mountpoint");
 942   printf ("    %s\n", _("Display the mountpoint instead of the partition"));
 943   printf (" %s\n", "-m, --megabytes");
 944   printf ("    %s\n", _("Same as '--units MB'"));
 945   printf (" %s\n", "-A, --all");
 946   printf ("    %s\n", _("Explicitly select all paths. This is equivalent to -R '.*'"));
 947   printf (" %s\n", "-R, --eregi-path=PATH, --eregi-partition=PARTITION");
 948   printf ("    %s\n", _("Case insensitive regular expression for path/partition (may be repeated)"));
 949   printf (" %s\n", "-r, --ereg-path=PATH, --ereg-partition=PARTITION");
 950   printf ("    %s\n", _("Regular expression for path or partition (may be repeated)"));
 951   printf (" %s\n", "-I, --ignore-eregi-path=PATH, --ignore-eregi-partition=PARTITION");
 952   printf ("    %s\n", _("Regular expression to ignore selected path/partition (case insensitive) (may be repeated)"));
 953   printf (" %s\n", "-i, --ignore-ereg-path=PATH, --ignore-ereg-partition=PARTITION");
 954   printf ("    %s\n", _("Regular expression to ignore selected path or partition (may be repeated)"));
 955   printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 956   printf (" %s\n", "-u, --units=STRING");
 957   printf ("    %s\n", _("Choose bytes, kB, MB, GB, TB (default: MB)"));
 958   printf (_(UT_VERBOSE));
 959   printf (" %s\n", "-X, --exclude-type=TYPE");
 960   printf ("    %s\n", _("Ignore all filesystems of indicated type (may be repeated)"));
 961
 962 #ifdef NP_EXTRA_OPTS
 963   printf ("\n");
 964   printf ("%s\n", _("Notes:"));
 965   printf (_(UT_EXTRA_OPTS_NOTES));
 966 #endif
 967
 968   printf ("\n");
 969   printf ("%s\n", _("Examples:"));
 970   printf (" %s\n", "check_disk -w 10% -c 5% -p /tmp -p /var -C -w 100000 -c 50000 -p /");
 971   printf ("    %s\n", _("Checks /tmp and /var at 10% and 5%, and / at 100MB and 50MB"));
 972   printf (" %s\n", "check_disk -w 100M -c 50M -C -w 1000M -c 500M -g sidDATA -r '^/oracle/SID/data.*$'");
 973   printf ("    %s\n", _("Checks all filesystems not matching -r at 100M and 50M. The fs matching the -r regex"));
 974   printf ("    %s\n", _("are grouped which means the freespace thresholds are applied to all disks together"));
 975   printf (" %s\n", "check_disk -w 100M -c 50M -C -w 1000M -c 500M -p /foo -C -w 5% -c 3% -p /bar");
 976   printf ("    %s\n", _("Checks /foo for 1000M/500M and /bar for 5/3%. All remaining volumes use 100M/50M"));
 977
 978   printf (_(UT_SUPPORT));
 979 }
 980
 981
 982
 983 void
 984 print_usage (void)
 985 {
 986   printf (_("Usage:"));
 987   printf (" %s -w limit -c limit [-W limit] [-K limit] {-p path | -x device}\n", progname);
 988   printf ("[-C] [-E] [-e] [-g group ] [-k] [-l] [-M] [-m] [-R path ] [-r path ]\n");
 989   printf ("[-t timeout] [-u unit] [-v] [-X type]\n");
 990 }
 991
 992 void
 993 stat_path (struct parameter_list *p)
 994 {
 995   /* Stat entry to check that dir exists and is accessible */
 996   if (verbose >= 3)
 997     printf("calling stat on %s\n", p->name);
 998   if (stat (p->name, &stat_buf[0])) {
 999     if (verbose >= 3)
1000       printf("stat failed on %s\n", p->name);
1001     printf("DISK %s - ", _("CRITICAL"));
1002     die (STATE_CRITICAL, _("%s %s: %s\n"), p->name, _("is not accessible"), strerror(errno));
1003   }
1004 }