lib/utils_disk.c

   1 /*****************************************************************************
   2 *
   3 * Library for check_disk
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2007 Monitoring Plugins Development Team
   7 *
   8 * Description:
   9 *
  10 * This file contains utilities for check_disk. These are tested by libtap
  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 #include "common.h"
  30 #include "utils_disk.h"
  31
  32 void
  33 np_add_name (struct name_list **list, const char *name)
  34 {
  35   struct name_list *new_entry;
  36   new_entry = (struct name_list *) malloc (sizeof *new_entry);
  37   new_entry->name = (char *) name;
  38   new_entry->next = *list;
  39   *list = new_entry;
  40 }
  41
  42 /* Initialises a new parameter at the end of list */
  43 struct parameter_list *
  44 np_add_parameter(struct parameter_list **list, const char *name)
  45 {
  46   struct parameter_list *current = *list;
  47   struct parameter_list *new_path;
  48   new_path = (struct parameter_list *) malloc (sizeof *new_path);
  49   new_path->name = (char *) name;
  50   new_path->best_match = NULL;
  51   new_path->name_next = NULL;
  52   new_path->freespace_bytes = NULL;
  53   new_path->freespace_units = NULL;
  54   new_path->freespace_percent = NULL;
  55   new_path->usedspace_bytes = NULL;
  56   new_path->usedspace_units = NULL;
  57   new_path->usedspace_percent = NULL;
  58   new_path->usedinodes_percent = NULL;
  59   new_path->freeinodes_percent = NULL;
  60   new_path->group = NULL;
  61   new_path->dfree_pct = -1;
  62   new_path->dused_pct = -1;
  63   new_path->total = 0;
  64   new_path->available = 0;
  65   new_path->available_to_root = 0;
  66   new_path->used = 0;
  67   new_path->dused_units = 0;
  68   new_path->dfree_units = 0;
  69   new_path->dtotal_units = 0;
  70   new_path->inodes_total = 0;
  71   new_path->inodes_free = 0;
  72   new_path->inodes_free_to_root = 0;
  73   new_path->inodes_used = 0;
  74   new_path->dused_inodes_percent = 0;
  75   new_path->dfree_inodes_percent = 0;
  76
  77   if (current == NULL) {
  78     *list = new_path;
  79   } else {
  80     while (current->name_next) {
  81       current = current->name_next;
  82     }
  83     current->name_next = new_path;
  84   }
  85   return new_path;
  86 }
  87
  88 /* Delete a given parameter from list and return pointer to next element*/
  89 struct parameter_list *
  90 np_del_parameter(struct parameter_list *item, struct parameter_list *prev)
  91 {
  92   struct parameter_list *next;
  93
  94   if (item->name_next)
  95     next = item->name_next;
  96   else
  97     next = NULL;
  98
  99   free(item);
 100   if (prev)
 101     prev->name_next = next;
 102
 103   return next;
 104 }
 105
 106
 107 /* returns a pointer to the struct found in the list */
 108 struct parameter_list *
 109 np_find_parameter(struct parameter_list *list, const char *name)
 110 {
 111   struct parameter_list *temp_list;
 112   for (temp_list = list; temp_list; temp_list = temp_list->name_next) {
 113     if (! strcmp(temp_list->name, name))
 114         return temp_list;
 115   }
 116
 117   return NULL;
 118 }
 119
 120 void
 121 np_set_best_match(struct parameter_list *desired, struct mount_entry *mount_list, int exact)
 122 {
 123   struct parameter_list *d;
 124   for (d = desired; d; d= d->name_next) {
 125     if (! d->best_match) {
 126       struct mount_entry *me;
 127       size_t name_len = strlen(d->name);
 128       size_t best_match_len = 0;
 129       struct mount_entry *best_match = NULL;
 130
 131       /* set best match if path name exactly matches a mounted device name */
 132       for (me = mount_list; me; me = me->me_next) {
 133         if (strcmp(me->me_devname, d->name)==0)
 134           best_match = me;
 135       }
 136
 137       /* set best match by directory name if no match was found by devname */
 138       if (! best_match) {
 139         for (me = mount_list; me; me = me->me_next) {
 140           size_t len = strlen (me->me_mountdir);
 141           if ((exact == FALSE && (best_match_len <= len && len <= name_len &&
 142              (len == 1 || strncmp (me->me_mountdir, d->name, len) == 0)))
 143              || (exact == TRUE && strcmp(me->me_mountdir, d->name)==0))
 144           {
 145             best_match = me;
 146             best_match_len = len;
 147           }
 148         }
 149       }
 150
 151       if (best_match) {
 152         d->best_match = best_match;
 153       } else {
 154         d->best_match = NULL;   /* Not sure why this is needed as it should be null on initialisation */
 155       }
 156     }
 157   }
 158 }
 159
 160 /* Returns TRUE if name is in list */
 161 int
 162 np_find_name (struct name_list *list, const char *name)
 163 {
 164   const struct name_list *n;
 165
 166   if (list == NULL || name == NULL) {
 167     return FALSE;
 168   }
 169   for (n = list; n; n = n->next) {
 170     if (!strcmp(name, n->name)) {
 171       return TRUE;
 172     }
 173   }
 174   return FALSE;
 175 }
 176
 177 int
 178 np_seen_name(struct name_list *list, const char *name)
 179 {
 180   const struct name_list *s;
 181   for (s = list; s; s=s->next) {
 182     if (!strcmp(s->name, name)) {
 183       return TRUE;
 184     }
 185   }
 186   return FALSE;
 187 }
 188
 189 int
 190 np_regex_match_mount_entry (struct mount_entry* me, regex_t* re)
 191 {
 192   if (regexec(re, me->me_devname, (size_t) 0, NULL, 0) == 0 ||
 193       regexec(re, me->me_mountdir, (size_t) 0, NULL, 0) == 0 ) {
 194     return TRUE;
 195   } else {
 196     return FALSE;
 197   }
 198 }
 199