lib/utils_disk.c

   1 /*****************************************************************************
   2 *
   3 * Library for check_disk
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2007 Nagios 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
  62   if (current == NULL) {
  63     *list = new_path;
  64   } else {
  65     while (current->name_next) {
  66       current = current->name_next;
  67     }
  68     current->name_next = new_path;
  69   }
  70   return new_path;
  71 }
  72
  73 /* Delete a given parameter from list and return pointer to next element*/
  74 struct parameter_list *
  75 np_del_parameter(struct parameter_list *item, struct parameter_list *prev)
  76 {
  77   struct parameter_list *next;
  78
  79   if (item->name_next)
  80     next = item->name_next;
  81   else
  82     next = NULL;
  83
  84   free(item);
  85   if (prev)
  86     prev->name_next = next;
  87
  88   return next;
  89 }
  90
  91
  92 /* returns a pointer to the struct found in the list */
  93 struct parameter_list *
  94 np_find_parameter(struct parameter_list *list, const char *name)
  95 {
  96   struct parameter_list *temp_list;
  97   for (temp_list = list; temp_list; temp_list = temp_list->name_next) {
  98     if (! strcmp(temp_list->name, name))
  99         return temp_list;
 100   }
 101
 102   return NULL;
 103 }
 104
 105 void
 106 np_set_best_match(struct parameter_list *desired, struct mount_entry *mount_list, int exact)
 107 {
 108   struct parameter_list *d;
 109   for (d = desired; d; d= d->name_next) {
 110     if (! d->best_match) {
 111       struct mount_entry *me;
 112       size_t name_len = strlen(d->name);
 113       size_t best_match_len = 0;
 114       struct mount_entry *best_match = NULL;
 115
 116       /* set best match if path name exactly matches a mounted device name */
 117       for (me = mount_list; me; me = me->me_next) {
 118         if (strcmp(me->me_devname, d->name)==0)
 119           best_match = me;
 120       }
 121
 122       /* set best match by directory name if no match was found by devname */
 123       if (! best_match) {
 124         for (me = mount_list; me; me = me->me_next) {
 125           size_t len = strlen (me->me_mountdir);
 126           if ((exact == FALSE && (best_match_len <= len && len <= name_len &&
 127              (len == 1 || strncmp (me->me_mountdir, d->name, len) == 0)))
 128              || (exact == TRUE && strcmp(me->me_mountdir, d->name)==0))
 129           {
 130             best_match = me;
 131             best_match_len = len;
 132           }
 133         }
 134       }
 135
 136       if (best_match) {
 137         d->best_match = best_match;
 138       } else {
 139         d->best_match = NULL;   /* Not sure why this is needed as it should be null on initialisation */
 140       }
 141     }
 142   }
 143 }
 144
 145 /* Returns TRUE if name is in list */
 146 int
 147 np_find_name (struct name_list *list, const char *name)
 148 {
 149   const struct name_list *n;
 150
 151   if (list == NULL || name == NULL) {
 152     return FALSE;
 153   }
 154   for (n = list; n; n = n->next) {
 155     if (!strcmp(name, n->name)) {
 156       return TRUE;
 157     }
 158   }
 159   return FALSE;
 160 }
 161
 162 int
 163 np_seen_name(struct name_list *list, const char *name)
 164 {
 165   const struct name_list *s;
 166   for (s = list; s; s=s->next) {
 167     if (!strcmp(s->name, name)) {
 168       return TRUE;
 169     }
 170   }
 171   return FALSE;
 172 }
 173
 174 int
 175 np_regex_match_mount_entry (struct mount_entry* me, regex_t* re)
 176 {
 177   if (regexec(re, me->me_devname, (size_t) 0, NULL, 0) == 0 ||
 178       regexec(re, me->me_mountdir, (size_t) 0, NULL, 0) == 0 ) {
 179     return TRUE;
 180   } else {
 181     return FALSE;
 182   }
 183 }
 184