Clean up warnings in common/

Fix consts and function declarations

16 files changed, 110 insertions, 108 deletions

diff --git a/common/collection/collection.c b/common/collection/collection.c
index b0bee08f..d3bc365d 100644
--- a/common/collection/collection.c
+++ b/common/collection/collection.c
@@ -69,7 +69,7 @@ struct update_property {
 };
 
 /* Dummy structure */
-struct collection_item dummy = { NULL, "", 0, COL_TYPE_END, 0, NULL };
+struct collection_item dummy_item = { NULL, "", 0, COL_TYPE_END, 0, NULL };
 
 /******************** FUNCTION DECLARATIONS ****************************/
 
@@ -184,7 +184,7 @@ void col_delete_item(struct collection_item *item)
 
 /* A generic function to allocate a property item */
 static int col_allocate_item(struct collection_item **ci, const char *property,
-                             void *item_data,int length, int type)
+                             const void *item_data, int length, int type)
 {
     struct collection_item *item = NULL;
     int error = 0;
@@ -278,7 +278,7 @@ struct property_search {
 /* Find the parent of the item with given name */
 static int col_find_property(struct collection_item *collection,
                              const char *refprop,
-                             int index,
+                             int idx,
                              int use_type,
                              int type,
                              struct collection_item **parent)
@@ -293,7 +293,7 @@ static int col_find_property(struct collection_item *collection,
     ps.property = refprop;
     ps.hash = FNV1a_base;
     ps.parent = NULL;
-    ps.index = index;
+    ps.index = idx;
     ps.count = 0;
     ps.found = 0;
     ps.use_type = use_type;
@@ -329,7 +329,7 @@ int col_insert_item_into_current(struct collection_item *collection,
                                  struct collection_item *item,
                                  int disposition,
                                  const char *refprop,
-                                 int index,
+                                 int idx,
                                  unsigned flags)
 {
     struct collection_header *header = NULL;
@@ -508,7 +508,7 @@ int col_insert_item_into_current(struct collection_item *collection,
                             }
                             break;
 
-    case COL_DSP_INDEX:     if(index == 0) {
+    case COL_DSP_INDEX:     if(idx == 0) {
                                 /* Same is first */
                                 if (header->count == 1) {
                                     header->last->next = item;
@@ -519,7 +519,7 @@ int col_insert_item_into_current(struct collection_item *collection,
                                     collection->next = item;
                                 }
                             }
-                            else if(index >= header->count - 1) {
+                            else if(idx >= header->count - 1) {
                                 /* In this case add to the end */
                                 if (header->last != NULL) header->last->next = item;
                                 /* Make sure we save a new last element */
@@ -529,8 +529,8 @@ int col_insert_item_into_current(struct collection_item *collection,
                                 /* In the middle */
                                 parent = collection;
                                 /* Move to the right position counting */
-                                while (index > 0) {
-                                    index--;
+                                while (idx > 0) {
+                                    idx--;
                                     parent = parent->next;
                                 }
                                 item->next = parent->next;
@@ -545,7 +545,7 @@ int col_insert_item_into_current(struct collection_item *collection,
 
                             if (disposition == COL_DSP_FIRSTDUP) refindex = 0;
                             else if (disposition == COL_DSP_LASTDUP) refindex = -1;
-                            else refindex = index;
+                            else refindex = idx;
 
                             /* We need to find property based on index */
                             if (col_find_property(collection, item->property, refindex, 0, 0, &parent)) {
@@ -580,7 +580,7 @@ int col_insert_item_into_current(struct collection_item *collection,
 int col_extract_item_from_current(struct collection_item *collection,
                                   int disposition,
                                   const char *refprop,
-                                  int index,
+                                  int idx,
                                   int type,
                                   struct collection_item **ret_ref)
 {
@@ -689,7 +689,7 @@ int col_extract_item_from_current(struct collection_item *collection,
                             }
                             break;
 
-    case COL_DSP_INDEX:     if (index == 0) {
+    case COL_DSP_INDEX:     if (idx == 0) {
                                 *ret_ref = collection->next;
                                 collection->next = (*ret_ref)->next;
                                 /* Special case - one data element */
@@ -698,7 +698,7 @@ int col_extract_item_from_current(struct collection_item *collection,
                             /* Index 0 stands for the first data element.
                              * Count includes header element.
                              */
-                            else if (index >= (header->count - 1)) {
+                            else if (idx >= (header->count - 1)) {
                                 TRACE_ERROR_STRING("Index is out of boundaries", refprop);
                                 return ENOENT;
                             }
@@ -707,7 +707,7 @@ int col_extract_item_from_current(struct collection_item *collection,
                                 refindex = 0;
                                 parent = collection;
                                 current = collection->next;
-                                while (refindex < index) {
+                                while (refindex < idx) {
                                     parent = current;
                                     current = current->next;
                                     refindex++;
@@ -725,7 +725,7 @@ int col_extract_item_from_current(struct collection_item *collection,
 
                             if (disposition == COL_DSP_FIRSTDUP) refindex = 0;
                             else if (disposition == COL_DSP_LASTDUP) refindex = -2;
-                            else refindex = index;
+                            else refindex = idx;
 
                             /* We need to find property based on index */
                             if (col_find_property(collection, refprop, refindex, use_type, type, &parent)) {
@@ -764,7 +764,7 @@ int col_extract_item(struct collection_item *collection,
                      const char *subcollection,
                      int disposition,
                      const char *refprop,
-                     int index,
+                     int idx,
                      int type,
                      struct collection_item **ret_ref)
 {
@@ -806,7 +806,7 @@ int col_extract_item(struct collection_item *collection,
     error = col_extract_item_from_current(col,
                                           disposition,
                                           refprop,
-                                          index,
+                                          idx,
                                           type,
                                           ret_ref);
     if (error) {
@@ -825,7 +825,7 @@ int col_insert_item(struct collection_item *collection,
                     struct collection_item *item,
                     int disposition,
                     const char *refprop,
-                    int index,
+                    int idx,
                     unsigned flags)
 {
     int error;
@@ -873,7 +873,7 @@ int col_insert_item(struct collection_item *collection,
                                          item,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags);
 
     if (error) {
@@ -894,11 +894,11 @@ static int col_insert_property_with_ref_int(struct collection_item *collection,
                                             const char *subcollection,
                                             int disposition,
                                             const char *refprop,
-                                            int index,
+                                            int idx,
                                             unsigned flags,
                                             const char *property,
                                             int type,
-                                            void *data,
+                                            const void *data,
                                             int length,
                                             struct collection_item **ret_ref)
 {
@@ -920,7 +920,7 @@ static int col_insert_property_with_ref_int(struct collection_item *collection,
                             item,
                             disposition,
                             refprop,
-                            index,
+                            idx,
                             flags);
     if (error) {
         TRACE_ERROR_NUMBER("Failed to insert item", error);
@@ -941,11 +941,11 @@ int col_insert_property_with_ref(struct collection_item *collection,
                                  const char *subcollection,
                                  int disposition,
                                  const char *refprop,
-                                 int index,
+                                 int idx,
                                  unsigned flags,
                                  const char *property,
                                  int type,
-                                 void *data,
+                                 const void *data,
                                  int length,
                                  struct collection_item **ret_ref)
 {
@@ -963,7 +963,7 @@ int col_insert_property_with_ref(struct collection_item *collection,
                                              subcollection,
                                              disposition,
                                              refprop,
-                                             index,
+                                             idx,
                                              flags,
                                              property,
                                              type,
@@ -1458,7 +1458,7 @@ static int col_simple_traverse_handler(struct collection_item *head,
 
     TRACE_FLOW_STRING("col_simple_traverse_handler", "Entry.");
 
-    if (current == NULL) current = &dummy;
+    if (current == NULL) current = &dummy_item;
 
     error = user_item_handler(current->property,
                               current->property_len,
@@ -2315,7 +2315,7 @@ int col_update_property(struct collection_item *ci,
 int col_modify_item(struct collection_item *item,
                     const char *property,
                     int type,
-                    void *data,
+                    const void *data,
                     int length)
 {
     TRACE_FLOW_STRING("col_modify_item", "Entry");
@@ -2616,7 +2616,7 @@ int col_iterate_collection(struct collection_iterator *iterator,
             if ((iterator->flags & COL_TRAVERSE_END) != 0) {
                 /* Return dummy entry to indicate the end of the collection */
                 TRACE_INFO_STRING("Finished level", "told to return END");
-                *item = &dummy;
+                *item = &dummy_item;
                 break;
             }
             else {
@@ -2725,7 +2725,7 @@ int col_get_item_length(struct collection_item *ci)
 }
 
 /* Get data */
-const void *col_get_item_data(struct collection_item *ci)
+void *col_get_item_data(struct collection_item *ci)
 {
     return ci->data;
 }
diff --git a/common/collection/collection.h b/common/collection/collection.h
index 8bce3c78..da785b1b 100644
--- a/common/collection/collection.h
+++ b/common/collection/collection.h
@@ -213,7 +213,7 @@ void col_destroy_collection(struct collection_item *ci);
 int col_add_str_property(struct collection_item *ci,
                          const char *subcollection,
                          const char *property,
-                         char *string,
+                         const char *string,
                          int length);
 /* Add a binary property to collection.  */
 int col_add_binary_property(struct collection_item *ci,
@@ -445,7 +445,7 @@ int col_get_item(struct collection_item *ci,       /* Collection to find things
 const char *col_get_item_property(struct collection_item *ci,int *property_len);
 int col_get_item_type(struct collection_item *ci);
 int col_get_item_length(struct collection_item *ci);
-const void *col_get_item_data(struct collection_item *ci);
+void *col_get_item_data(struct collection_item *ci);
 
 /* If you want to modify the item that you got as a result of iterating through collection
  * or by calling col_get_item(). If you want to rename item provide a new name in the property
@@ -456,7 +456,7 @@ const void *col_get_item_data(struct collection_item *ci);
 int col_modify_item(struct collection_item *item,
                     const char *property,
                     int type,
-                    void *data,
+                    const void *data,
                     int length);
 
 /* Rename the item */
@@ -469,7 +469,7 @@ int col_modify_item_property(struct collection_item *item,
  */
 int col_modify_str_item(struct collection_item *item,
                         const char *property,
-                        char *string,
+                        const char *string,
                         int length);
 int col_modify_binary_item(struct collection_item *item,
                            const char *property,
@@ -732,7 +732,7 @@ int col_insert_property_with_ref(struct collection_item *ci,        /* A collect
                                  unsigned flags,                    /* Flags that control naming issues */
                                  const char *property,              /* Name */
                                  int type,                          /* Data type */
-                                 void *data,                        /* Pointer to the data */
+                                 const void *data,                  /* Pointer to the data */
                                  int length,                        /* Length of the data. For
                                                                      * strings it includes the
                                                                      * trailing 0
@@ -747,7 +747,7 @@ int col_insert_str_property(struct collection_item *ci,        /* A collection o
                             int index,                         /* Index of the property to add */
                             unsigned flags,                    /* Flags that control naming issues */
                             const char *property,              /* Name */
-                            char *string,                      /* String */
+                            const char *string,                /* String */
                             int length);                       /* Length */
 
 int col_insert_binary_property(struct collection_item *ci,        /* A collection of items */
diff --git a/common/collection/collection_cnv.c b/common/collection/collection_cnv.c
index 1a70600e..e60935ae 100644
--- a/common/collection/collection_cnv.c
+++ b/common/collection/collection_cnv.c
@@ -39,10 +39,10 @@ int col_insert_str_property(struct collection_item *ci,
                             const char *subcollection,
                             int disposition,
                             const char *refprop,
-                            int index,
+                            int idx,
                             unsigned flags,
                             const char *property,
-                            char *string,
+                            const char *string,
                             int length)
 {
     int error = EOK;
@@ -55,11 +55,11 @@ int col_insert_str_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_STRING,
-                                         (void *)string,
+                                         (const void *)string,
                                          length,
                                          NULL);
 
@@ -72,7 +72,7 @@ int col_insert_binary_property(struct collection_item *ci,
                                const char *subcollection,
                                int disposition,
                                const char *refprop,
-                               int index,
+                               int idx,
                                unsigned flags,
                                const char *property,
                                void *binary_data,
@@ -86,7 +86,7 @@ int col_insert_binary_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_BINARY,
@@ -104,7 +104,7 @@ int col_insert_int_property(struct collection_item *ci,
                             const char *subcollection,
                             int disposition,
                             const char *refprop,
-                            int index,
+                            int idx,
                             unsigned flags,
                             const char *property,
                             int number)
@@ -117,7 +117,7 @@ int col_insert_int_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_INTEGER,
@@ -135,7 +135,7 @@ int col_insert_unsigned_property(struct collection_item *ci,
                                  const char *subcollection,
                                  int disposition,
                                  const char *refprop,
-                                 int index,
+                                 int idx,
                                  unsigned flags,
                                  const char *property,
                                  unsigned number)
@@ -148,7 +148,7 @@ int col_insert_unsigned_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_UNSIGNED,
@@ -166,7 +166,7 @@ int col_insert_long_property(struct collection_item *ci,
                              const char *subcollection,
                              int disposition,
                              const char *refprop,
-                             int index,
+                             int idx,
                              unsigned flags,
                              const char *property,
                              long number)
@@ -179,7 +179,7 @@ int col_insert_long_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_LONG,
@@ -196,7 +196,7 @@ int col_insert_ulong_property(struct collection_item *ci,
                               const char *subcollection,
                               int disposition,
                               const char *refprop,
-                              int index,
+                              int idx,
                               unsigned flags,
                               const char *property,
                               unsigned long number)
@@ -209,7 +209,7 @@ int col_insert_ulong_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_ULONG,
@@ -226,7 +226,7 @@ int col_insert_double_property(struct collection_item *ci,
                                const char *subcollection,
                                int disposition,
                                const char *refprop,
-                               int index,
+                               int idx,
                                unsigned flags,
                                const char *property,
                                double number)
@@ -239,7 +239,7 @@ int col_insert_double_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_DOUBLE,
@@ -256,7 +256,7 @@ int col_insert_bool_property(struct collection_item *ci,
                              const char *subcollection,
                              int disposition,
                              const char *refprop,
-                             int index,
+                             int idx,
                              unsigned flags,
                              const char *property,
                              unsigned char logical)
@@ -269,7 +269,7 @@ int col_insert_bool_property(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_BOOL,
@@ -287,7 +287,7 @@ int col_insert_str_property_with_ref(struct collection_item *ci,
                                      const char *subcollection,
                                      int disposition,
                                      const char *refprop,
-                                     int index,
+                                     int idx,
                                      unsigned flags,
                                      const char *property,
                                      char *string,
@@ -304,7 +304,7 @@ int col_insert_str_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_STRING,
@@ -321,7 +321,7 @@ int col_insert_binary_property_with_ref(struct collection_item *ci,
                                         const char *subcollection,
                                         int disposition,
                                         const char *refprop,
-                                        int index,
+                                        int idx,
                                         unsigned flags,
                                         const char *property,
                                         void *binary_data,
@@ -336,7 +336,7 @@ int col_insert_binary_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_BINARY,
@@ -353,7 +353,7 @@ int col_insert_int_property_with_ref(struct collection_item *ci,
                                      const char *subcollection,
                                      int disposition,
                                      const char *refprop,
-                                     int index,
+                                     int idx,
                                      unsigned flags,
                                      const char *property,
                                      int number,
@@ -367,7 +367,7 @@ int col_insert_int_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_INTEGER,
@@ -385,7 +385,7 @@ int col_insert_unsigned_property_with_ref(struct collection_item *ci,
                                           const char *subcollection,
                                           int disposition,
                                           const char *refprop,
-                                          int index,
+                                          int idx,
                                           unsigned flags,
                                           const char *property,
                                           unsigned number,
@@ -399,7 +399,7 @@ int col_insert_unsigned_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_UNSIGNED,
@@ -416,7 +416,7 @@ int col_insert_long_property_with_ref(struct collection_item *ci,
                                       const char *subcollection,
                                       int disposition,
                                       const char *refprop,
-                                      int index,
+                                      int idx,
                                       unsigned flags,
                                       const char *property,
                                       long number,
@@ -430,7 +430,7 @@ int col_insert_long_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_LONG,
@@ -447,7 +447,7 @@ int col_insert_ulong_property_with_ref(struct collection_item *ci,
                                        const char *subcollection,
                                        int disposition,
                                        const char *refprop,
-                                       int index,
+                                       int idx,
                                        unsigned flags,
                                        const char *property,
                                        unsigned long number,
@@ -461,7 +461,7 @@ int col_insert_ulong_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_ULONG,
@@ -478,7 +478,7 @@ int col_insert_double_property_with_ref(struct collection_item *ci,
                                         const char *subcollection,
                                         int disposition,
                                         const char *refprop,
-                                        int index,
+                                        int idx,
                                         unsigned flags,
                                         const char *property,
                                         double number,
@@ -492,7 +492,7 @@ int col_insert_double_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_DOUBLE,
@@ -509,7 +509,7 @@ int col_insert_bool_property_with_ref(struct collection_item *ci,
                                       const char *subcollection,
                                       int disposition,
                                       const char *refprop,
-                                      int index,
+                                      int idx,
                                       unsigned flags,
                                       const char *property,
                                       unsigned char logical,
@@ -523,7 +523,7 @@ int col_insert_bool_property_with_ref(struct collection_item *ci,
                                          subcollection,
                                          disposition,
                                          refprop,
-                                         index,
+                                         idx,
                                          flags,
                                          property,
                                          COL_TYPE_BOOL,
@@ -540,7 +540,7 @@ int col_insert_bool_property_with_ref(struct collection_item *ci,
 int col_add_str_property(struct collection_item *ci,
                          const char *subcollection,
                          const char *property,
-                         char *string,
+                         const char *string,
                          int length)
 {
     int error = EOK;
@@ -1141,7 +1141,7 @@ int col_modify_item_property(struct collection_item *item,
 /* Modify item data to be str */
 int col_modify_str_item(struct collection_item *item,
                         const char *property,
-                        char *string,
+                        const char *string,
                         int length)
 {
     int len;
@@ -1152,7 +1152,8 @@ int col_modify_str_item(struct collection_item *item,
     if (length != 0) len = length;
     else len = strlen(string) + 1;
 
-    error = col_modify_item(item, property, COL_TYPE_STRING, (void *)string, len);
+    error = col_modify_item(item, property,
+                            COL_TYPE_STRING, (const void *)string, len);
 
     TRACE_FLOW_STRING("col_modify_str_item", "Exit");
     return error;
diff --git a/common/collection/collection_queue.c b/common/collection/collection_queue.c
index 73e532e1..35c59bc4 100644
--- a/common/collection/collection_queue.c
+++ b/common/collection/collection_queue.c
@@ -51,7 +51,7 @@ void col_destroy_queue(struct collection_item *queue)
 /* Put a string property into a queue.  */
 int col_enqueue_str_property(struct collection_item *queue,
                              const char *property,
-                             char *string,
+                             const char *string,
                              int length)
 {
     int error = EOK;
diff --git a/common/collection/collection_queue.h b/common/collection/collection_queue.h
index 24bdd65e..ff150ef6 100644
--- a/common/collection/collection_queue.h
+++ b/common/collection/collection_queue.h
@@ -38,7 +38,7 @@ void col_destroy_queue(struct collection_item *queue);
 /* Put a string property to queue.  */
 int col_enqueue_str_property(struct collection_item *queue,
                              const char *property,
-                             char *string,
+                             const char *string,
                              int length);
 /* Put a binary property to queue.  */
 int col_enqueue_binary_property(struct collection_item *queue,
diff --git a/common/collection/collection_queue_ut.c b/common/collection/collection_queue_ut.c
index 203936ab..81fb6335 100644
--- a/common/collection/collection_queue_ut.c
+++ b/common/collection/collection_queue_ut.c
@@ -29,7 +29,7 @@
 #include "collection_tools.h"
 
 
-int queue_test()
+int queue_test(void)
 {
     struct collection_item *queue = NULL;
     char binary_dump[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
@@ -89,7 +89,7 @@ int queue_test()
 
 /* Main function of the unit test */
 
-int main()
+int main(int argc, char *argv[])
 {
     int error = EOK;
 
diff --git a/common/collection/collection_stack.c b/common/collection/collection_stack.c
index 9290b4e4..674c6c16 100644
--- a/common/collection/collection_stack.c
+++ b/common/collection/collection_stack.c
@@ -50,7 +50,7 @@ void col_destroy_stack(struct collection_item *stack)
 
 
 int col_push_str_property(struct collection_item *stack,
-                          const char *property, char *string, int length)
+                          const char *property, const char *string, int length)
 {
     int error = EOK;
 
diff --git a/common/collection/collection_stack.h b/common/collection/collection_stack.h
index ef52767f..256094c2 100644
--- a/common/collection/collection_stack.h
+++ b/common/collection/collection_stack.h
@@ -38,7 +38,7 @@ void col_destroy_stack(struct collection_item *stack);
 /* Push a string property to stack.  */
 int col_push_str_property(struct collection_item *stack,
                           const char *property,
-                          char *string,
+                          const char *string,
                           int length);
 /* Push a binary property to stack.  */
 int col_push_binary_property(struct collection_item *stack,
diff --git a/common/collection/collection_stack_ut.c b/common/collection/collection_stack_ut.c
index b3337c77..ebf62fc6 100644
--- a/common/collection/collection_stack_ut.c
+++ b/common/collection/collection_stack_ut.c
@@ -29,7 +29,7 @@
 #include "collection_tools.h"
 
 
-int stack_test()
+int stack_test(void)
 {
     struct collection_item *stack = NULL;
     char binary_dump[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
@@ -96,7 +96,7 @@ int stack_test()
 
 /* Main function of the unit test */
 
-int main()
+int main(int argc, char *argv[])
 {
     int error = EOK;
 
diff --git a/common/collection/collection_tools.c b/common/collection/collection_tools.c
index 88ba4f09..43466d7f 100644
--- a/common/collection/collection_tools.c
+++ b/common/collection/collection_tools.c
@@ -263,7 +263,7 @@ int col_get_data_len(int type, int length)
 }
 
 /* Copy data escaping characters */
-static int col_copy_esc(char *dest, char *source, char esc)
+static int col_copy_esc(char *dest, const char *source, char esc)
 {
     int i = 0;
     int j = 0;
@@ -450,14 +450,15 @@ int col_serialize(const char *property_in,
     switch (type) {
     case COL_TYPE_STRING:
         /* Escape double quotes */
-        len = col_copy_esc(&buf_data->buffer[buf_data->length], (char *)(data), '"');
+        len = col_copy_esc(&buf_data->buffer[buf_data->length],
+                           (const char *)(data), '"');
         break;
 
     case COL_TYPE_BINARY:
         buf_data->buffer[buf_data->length] = '\'';
         for (i = 0; i < length; i++)
             sprintf(&buf_data->buffer[buf_data->length + i *2] + 1,
-                    "%02X", (unsigned int)(((unsigned char *)(data))[i]));
+                    "%02X", (unsigned int)(((const unsigned char *)(data))[i]));
         len = length * 2 + 1;
         buf_data->buffer[buf_data->length + len] = '\'';
         len++;
@@ -465,32 +466,32 @@ int col_serialize(const char *property_in,
 
     case COL_TYPE_INTEGER:
         len = sprintf(&buf_data->buffer[buf_data->length],
-                      "%d", *((int *)(data)));
+                      "%d", *((const int *)(data)));
         break;
 
     case COL_TYPE_UNSIGNED:
         len = sprintf(&buf_data->buffer[buf_data->length],
-                      "%u", *((unsigned int *)(data)));
+                      "%u", *((const unsigned int *)(data)));
         break;
 
     case COL_TYPE_LONG:
         len = sprintf(&buf_data->buffer[buf_data->length],
-                      "%ld", *((long *)(data)));
+                      "%ld", *((const long *)(data)));
         break;
 
     case COL_TYPE_ULONG:
         len = sprintf(&buf_data->buffer[buf_data->length],
-                      "%lu", *((unsigned long *)(data)));
+                      "%lu", *((const unsigned long *)(data)));
         break;
 
     case COL_TYPE_DOUBLE:
         len = sprintf(&buf_data->buffer[buf_data->length],
-                      "%.4f", *((double *)(data)));
+                      "%.4f", *((const double *)(data)));
         break;
 
     case COL_TYPE_BOOL:
         len = sprintf(&buf_data->buffer[buf_data->length],
-                      "%s", (*((unsigned char *)(data))) ? "true" : "false");
+                      "%s", (*((const unsigned char *)(data))) ? "true" : "false");
         break;
 
     default:
@@ -607,7 +608,7 @@ int col_print_collection2(struct collection_item *handle)
 }
 
 /* Find and print one item using default serialization */
-int col_print_item(struct collection_item *handle, char *name)
+int col_print_item(struct collection_item *handle, const char *name)
 {
     struct col_serial_data buf_data;
     int error = EOK;
diff --git a/common/collection/collection_tools.h b/common/collection/collection_tools.h
index 74453297..5bcf0859 100644
--- a/common/collection/collection_tools.h
+++ b/common/collection/collection_tools.h
@@ -96,7 +96,7 @@ int col_print_collection2(struct collection_item *handle);
 
 
 /* Find and print one item using default serialization */
-int col_print_item(struct collection_item *handle, char *name);
+int col_print_item(struct collection_item *handle, const char *name);
 
 /* Convert collection to list of properties */
 char **col_collection_to_list(struct collection_item *handle, int *size, int *error);
diff --git a/common/collection/collection_ut.c b/common/collection/collection_ut.c
index f24d46a5..53fc4d70 100644
--- a/common/collection/collection_ut.c
+++ b/common/collection/collection_ut.c
@@ -29,7 +29,7 @@
 #include "collection_tools.h"
 
 
-int ref_collection_test()
+int ref_collection_test(void)
 {
     struct collection_item *peer = NULL;
     struct collection_item *socket = NULL;
@@ -108,7 +108,7 @@ int ref_collection_test()
 }
 
 
-int single_collection_test()
+int single_collection_test(void)
 {
     struct collection_item *handle = NULL;
     int error = EOK;
@@ -164,7 +164,7 @@ int single_collection_test()
     return error;
 }
 
-int add_collection_test()
+int add_collection_test(void)
 {
     struct collection_item *peer = NULL;
     struct collection_item *socket = NULL;
@@ -222,7 +222,7 @@ int add_collection_test()
     return error;
 }
 
-int mixed_collection_test()
+int mixed_collection_test(void)
 {
     struct collection_item *peer;
     struct collection_item *socket1;
@@ -550,7 +550,7 @@ int mixed_collection_test()
 }
 
 
-int iterator_test()
+int iterator_test(void)
 {
     struct collection_item *peer;
     struct collection_item *socket1;
@@ -696,7 +696,7 @@ int iterator_test()
 }
 
 
-int insert_extract_test()
+int insert_extract_test(void)
 {
     struct collection_item *col;
     struct collection_item *col2;
@@ -874,7 +874,7 @@ int insert_extract_test()
     return EOK;
 }
 
-int delete_test()
+int delete_test(void)
 {
 
     struct collection_item *col;
@@ -910,7 +910,7 @@ int delete_test()
 
 /* Main function of the unit test */
 
-int main()
+int main(int argc, char *argv[])
 {
     int error = 0;
 
diff --git a/common/dhash/dhash.h b/common/dhash/dhash.h
index 4f97f69e..2bc5e6e3 100644
--- a/common/dhash/dhash.h
+++ b/common/dhash/dhash.h
@@ -100,7 +100,7 @@ typedef enum
 typedef struct hash_key_t {
     hash_key_enum type;
     union {
-        const char *str;
+        char *str;
         unsigned long ul;
     };
 } hash_key_t;
diff --git a/common/ini/ini_config.c b/common/ini/ini_config.c
index 9b23c94c..4f4ac2f2 100644
--- a/common/ini/ini_config.c
+++ b/common/ini/ini_config.c
@@ -1408,9 +1408,9 @@ void free_bin_config_value(char *value)
 
 /* Arrays of stings and integers */
 char **get_string_config_array(struct collection_item *item,
-                               char *sep, int *size, int *error)
+                               const char *sep, int *size, int *error)
 {
-    char defsep[] = ",";
+    const char *defsep = ",";
     char *copy = NULL;
     char *dest = NULL;
     int lensep;
diff --git a/common/ini/ini_config.h b/common/ini/ini_config.h
index 46e83d1c..05ab27df 100644
--- a/common/ini/ini_config.h
+++ b/common/ini/ini_config.h
@@ -216,7 +216,7 @@ void free_bin_config_value(char *);
 /* Array of stings */
 /* Separator sting includes up to three different separators. If NULL comma is assumed. */
 /* The spaces are trimmed automatically around separators in the string. */
-char **get_string_config_array(struct collection_item *item, char *sep, int *size, int *error);
+char **get_string_config_array(struct collection_item *item, const char *sep, int *size, int *error);
 /* Array of long values - separators are detected automatically. */
 /* The length of the allocated array is returned in "size" */
 long *get_long_config_array(struct collection_item *item, int *size, int *error);
diff --git a/common/ini/ini_config_ut.c b/common/ini/ini_config_ut.c
index 24912738..58a5d762 100644
--- a/common/ini/ini_config_ut.c
+++ b/common/ini/ini_config_ut.c
@@ -28,7 +28,7 @@
 #include "collection_tools.h"
 
 
-int basic_test()
+int basic_test(void)
 {
     int error;
     struct collection_item *ini_config = NULL;
@@ -56,7 +56,7 @@ int basic_test()
     return 0;
 }
 
-int single_file()
+int single_file(void)
 {
     int error;
     struct collection_item *ini_config = NULL;
@@ -118,7 +118,7 @@ int single_file()
     return 0;
 }
 
-int negative_test()
+int negative_test(void)
 {
     int error;
     unsigned int count;
@@ -241,7 +241,7 @@ int real_test(const char *file)
     return 0;
 }
 
-int get_test()
+int get_test(void)
 {
 
     int error;
@@ -797,7 +797,7 @@ int get_test()
     return EOK;
 }
 
-int main()
+int main(int argc, char *argv[])
 {
     int error;