Move disk specific stuff from lib to plugin specific directory

1 files changed, 255 insertions, 0 deletions

diff --git a/plugins/check_disk.d/utils_disk.c b/plugins/check_disk.d/utils_disk.c
new file mode 100644
index 00000000..2b761f5e
--- /dev/null
+++ b/plugins/check_disk.d/utils_disk.c
@@ -0,0 +1,255 @@
+/*****************************************************************************
+ *
+ * Library for check_disk
+ *
+ * License: GPL
+ * Copyright (c) 1999-2024 Monitoring Plugins Development Team
+ *
+ * Description:
+ *
+ * This file contains utilities for check_disk. These are tested by libtap
+ *
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ *****************************************************************************/
+
+#include "common.h"
+#include "utils_disk.h"
+#include "gl/fsusage.h"
+#include <string.h>
+
+void np_add_name(struct name_list **list, const char *name) {
+        struct name_list *new_entry;
+        new_entry = (struct name_list *)malloc(sizeof *new_entry);
+        new_entry->name = (char *)name;
+        new_entry->next = *list;
+        *list = new_entry;
+}
+
+/* @brief Initialises a new regex at the begin of list via regcomp(3)
+ *
+ * @details if the regex fails to compile the error code of regcomp(3) is returned
+ *                                      and list is not modified, otherwise list is modified to point to the new
+ *                                      element
+ * @param list Pointer to a linked list of regex_list elements
+ * @param regex the string containing the regex which should be inserted into the list
+ * @param clags the cflags parameter for regcomp(3)
+ */
+int np_add_regex(struct regex_list **list, const char *regex, int cflags) {
+        struct regex_list *new_entry = (struct regex_list *)malloc(sizeof *new_entry);
+
+        if (new_entry == NULL) {
+                die(STATE_UNKNOWN, _("Cannot allocate memory: %s"), strerror(errno));
+        }
+
+        int regcomp_result = regcomp(&new_entry->regex, regex, cflags);
+
+        if (!regcomp_result) {
+                // regcomp succeeded
+                new_entry->next = *list;
+                *list = new_entry;
+
+                return 0;
+        } else {
+                // regcomp failed
+                free(new_entry);
+
+                return regcomp_result;
+        }
+}
+
+/* Initialises a new parameter at the end of list */
+struct parameter_list *np_add_parameter(struct parameter_list **list, const char *name) {
+        struct parameter_list *current = *list;
+        struct parameter_list *new_path;
+        new_path = (struct parameter_list *)malloc(sizeof *new_path);
+        new_path->name = (char *)malloc(strlen(name) + 1);
+        new_path->best_match = NULL;
+        new_path->name_next = NULL;
+        new_path->name_prev = NULL;
+        new_path->freespace_bytes = NULL;
+        new_path->freespace_units = NULL;
+        new_path->freespace_percent = NULL;
+        new_path->usedspace_bytes = NULL;
+        new_path->usedspace_units = NULL;
+        new_path->usedspace_percent = NULL;
+        new_path->usedinodes_percent = NULL;
+        new_path->freeinodes_percent = NULL;
+        new_path->group = NULL;
+        new_path->dfree_pct = -1;
+        new_path->dused_pct = -1;
+        new_path->total = 0;
+        new_path->available = 0;
+        new_path->available_to_root = 0;
+        new_path->used = 0;
+        new_path->dused_units = 0;
+        new_path->dfree_units = 0;
+        new_path->dtotal_units = 0;
+        new_path->inodes_total = 0;
+        new_path->inodes_free = 0;
+        new_path->inodes_free_to_root = 0;
+        new_path->inodes_used = 0;
+        new_path->dused_inodes_percent = 0;
+        new_path->dfree_inodes_percent = 0;
+
+        strcpy(new_path->name, name);
+
+        if (current == NULL) {
+                *list = new_path;
+                new_path->name_prev = NULL;
+        } else {
+                while (current->name_next) {
+                        current = current->name_next;
+                }
+                current->name_next = new_path;
+                new_path->name_prev = current;
+        }
+        return new_path;
+}
+
+/* Delete a given parameter from list and return pointer to next element*/
+struct parameter_list *np_del_parameter(struct parameter_list *item, struct parameter_list *prev) {
+        if (item == NULL) {
+                return NULL;
+        }
+        struct parameter_list *next;
+
+        if (item->name_next)
+                next = item->name_next;
+        else
+                next = NULL;
+
+        if (next)
+                next->name_prev = prev;
+
+        if (prev)
+                prev->name_next = next;
+
+        if (item->name) {
+                free(item->name);
+        }
+        free(item);
+
+        return next;
+}
+
+/* returns a pointer to the struct found in the list */
+struct parameter_list *np_find_parameter(struct parameter_list *list, const char *name) {
+        struct parameter_list *temp_list;
+        for (temp_list = list; temp_list; temp_list = temp_list->name_next) {
+                if (!strcmp(temp_list->name, name))
+                        return temp_list;
+        }
+
+        return NULL;
+}
+
+void np_set_best_match(struct parameter_list *desired, struct mount_entry *mount_list, bool exact) {
+        struct parameter_list *d;
+        for (d = desired; d; d = d->name_next) {
+                if (!d->best_match) {
+                        struct mount_entry *me;
+                        size_t name_len = strlen(d->name);
+                        size_t best_match_len = 0;
+                        struct mount_entry *best_match = NULL;
+                        struct fs_usage fsp;
+
+                        /* set best match if path name exactly matches a mounted device name */
+                        for (me = mount_list; me; me = me->me_next) {
+                                if (strcmp(me->me_devname, d->name) == 0) {
+                                        if (get_fs_usage(me->me_mountdir, me->me_devname, &fsp) >= 0) {
+                                                best_match = me;
+                                        }
+                                }
+                        }
+
+                        /* set best match by directory name if no match was found by devname */
+                        if (!best_match) {
+                                for (me = mount_list; me; me = me->me_next) {
+                                        size_t len = strlen(me->me_mountdir);
+                                        if ((!exact &&
+                                                 (best_match_len <= len && len <= name_len && (len == 1 || strncmp(me->me_mountdir, d->name, len) == 0))) ||
+                                                (exact && strcmp(me->me_mountdir, d->name) == 0)) {
+                                                if (get_fs_usage(me->me_mountdir, me->me_devname, &fsp) >= 0) {
+                                                        best_match = me;
+                                                        best_match_len = len;
+                                                }
+                                        }
+                                }
+                        }
+
+                        if (best_match) {
+                                d->best_match = best_match;
+                        } else {
+                                d->best_match = NULL; /* Not sure why this is needed as it should be null on initialisation */
+                        }
+                }
+        }
+}
+
+/* Returns true if name is in list */
+bool np_find_name(struct name_list *list, const char *name) {
+        const struct name_list *n;
+
+        if (list == NULL || name == NULL) {
+                return false;
+        }
+        for (n = list; n; n = n->next) {
+                if (!strcmp(name, n->name)) {
+                        return true;
+                }
+        }
+        return false;
+}
+
+/* Returns true if name is in list */
+bool np_find_regmatch(struct regex_list *list, const char *name) {
+        int len;
+        regmatch_t m;
+
+        if (name == NULL) {
+                return false;
+        }
+
+        len = strlen(name);
+
+        for (; list; list = list->next) {
+                /* Emulate a full match as if surrounded with ^( )$
+                   by checking whether the match spans the whole name */
+                if (!regexec(&list->regex, name, 1, &m, 0) && m.rm_so == 0 && m.rm_eo == len) {
+                        return true;
+                }
+        }
+
+        return false;
+}
+
+bool np_seen_name(struct name_list *list, const char *name) {
+        const struct name_list *s;
+        for (s = list; s; s = s->next) {
+                if (!strcmp(s->name, name)) {
+                        return true;
+                }
+        }
+        return false;
+}
+
+bool np_regex_match_mount_entry(struct mount_entry *me, regex_t *re) {
+        if (regexec(re, me->me_devname, (size_t)0, NULL, 0) == 0 || regexec(re, me->me_mountdir, (size_t)0, NULL, 0) == 0) {
+                return true;
+        }
+        return false;
+}