refactor check_disk.d code a bit

1 files changed, 70 insertions, 69 deletions

diff --git a/plugins/check_disk.d/utils_disk.c b/plugins/check_disk.d/utils_disk.c
index 2b761f5e..1d806715 100644
--- a/plugins/check_disk.d/utils_disk.c
+++ b/plugins/check_disk.d/utils_disk.c
@@ -63,12 +63,46 @@ int np_add_regex(struct regex_list **list, const char *regex, int cflags) {
                 *list = new_entry;
 
                 return 0;
-        } else {
-                // regcomp failed
-                free(new_entry);
-
-                return regcomp_result;
         }
+        // regcomp failed
+        free(new_entry);
+
+        return regcomp_result;
+}
+
+struct parameter_list parameter_list_init(const char *name) {
+        struct parameter_list result = {
+                .name = strdup(name),
+                .best_match = NULL,
+
+                .name_next = NULL,
+                .name_prev = NULL,
+
+                .freespace_units = NULL,
+                .freespace_percent = NULL,
+                .usedspace_units = NULL,
+                .usedspace_percent = NULL,
+                .usedinodes_percent = NULL,
+                .freeinodes_percent = NULL,
+
+                .group = NULL,
+                .dfree_pct = -1,
+                .dused_pct = -1,
+                .total = 0,
+                .available = 0,
+                .available_to_root = 0,
+                .used = 0,
+                .dused_units = 0,
+                .dfree_units = 0,
+                .dtotal_units = 0,
+                .inodes_total = 0,
+                .inodes_free = 0,
+                .inodes_free_to_root = 0,
+                .inodes_used = 0,
+                .dused_inodes_percent = 0,
+                .dfree_inodes_percent = 0,
+        };
+        return result;
 }
 
 /* Initialises a new parameter at the end of list */
@@ -76,36 +110,8 @@ struct parameter_list *np_add_parameter(struct parameter_list **list, const char
         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);
+
+        *new_path = parameter_list_init(name);
 
         if (current == NULL) {
                 *list = new_path;
@@ -125,18 +131,22 @@ struct parameter_list *np_del_parameter(struct parameter_list *item, struct para
         if (item == NULL) {
                 return NULL;
         }
+
         struct parameter_list *next;
 
-        if (item->name_next)
+        if (item->name_next) {
                 next = item->name_next;
-        else
+        } else {
                 next = NULL;
+        }
 
-        if (next)
+        if (next) {
                 next->name_prev = prev;
+        }
 
-        if (prev)
+        if (prev) {
                 prev->name_next = next;
+        }
 
         if (item->name) {
                 free(item->name);
@@ -148,43 +158,42 @@ struct parameter_list *np_del_parameter(struct parameter_list *item, struct para
 
 /* 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))
+        for (struct parameter_list *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) {
+        for (struct parameter_list *d = desired; d; d = d->name_next) {
                 if (!d->best_match) {
-                        struct mount_entry *me;
+                        struct mount_entry *mount_entry;
                         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;
+                        for (mount_entry = mount_list; mount_entry; mount_entry = mount_entry->me_next) {
+                                if (strcmp(mount_entry->me_devname, d->name) == 0) {
+                                        if (get_fs_usage(mount_entry->me_mountdir, mount_entry->me_devname, &fsp) >= 0) {
+                                                best_match = mount_entry;
                                         }
                                 }
                         }
 
                         /* 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;
+                                for (mount_entry = mount_list; mount_entry; mount_entry = mount_entry->me_next) {
+                                        size_t len = strlen(mount_entry->me_mountdir);
+                                        if ((!exact && (best_match_len <= len && len <= name_len &&
+                                                                        (len == 1 || strncmp(mount_entry->me_mountdir, d->name, len) == 0))) ||
+                                                (exact && strcmp(mount_entry->me_mountdir, d->name) == 0)) {
+                                                if (get_fs_usage(mount_entry->me_mountdir, mount_entry->me_devname, &fsp) >= 0) {
+                                                        best_match = mount_entry;
                                                         best_match_len = len;
                                                 }
                                         }
@@ -202,12 +211,10 @@ void np_set_best_match(struct parameter_list *desired, struct mount_entry *mount
 
 /* 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) {
+        for (struct name_list *n = list; n; n = n->next) {
                 if (!strcmp(name, n->name)) {
                         return true;
                 }
@@ -217,18 +224,16 @@ bool np_find_name(struct name_list *list, const char *name) {
 
 /* 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);
+        int 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 */
+                regmatch_t m;
                 if (!regexec(&list->regex, name, 1, &m, 0) && m.rm_so == 0 && m.rm_eo == len) {
                         return true;
                 }
@@ -238,8 +243,7 @@ bool np_find_regmatch(struct regex_list *list, const char *name) {
 }
 
 bool np_seen_name(struct name_list *list, const char *name) {
-        const struct name_list *s;
-        for (s = list; s; s = s->next) {
+        for (struct name_list *s = list; s; s = s->next) {
                 if (!strcmp(s->name, name)) {
                         return true;
                 }
@@ -248,8 +252,5 @@ bool np_seen_name(struct name_list *list, const char *name) {
 }
 
 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;
+        return ((regexec(re, me->me_devname, (size_t)0, NULL, 0) == 0) || (regexec(re, me->me_mountdir, (size_t)0, NULL, 0) == 0));
 }