Add bacnet_strdup function to replace POSIX strdup and update bacfile to use it (#1251)

CHANGELOG.md

@@ -12,7 +12,7 @@ The git repositories are hosted at the following sites:
 * https://bacnet.sourceforge.net/
 * https://github.com/bacnet-stack/bacnet-stack/
 
-## [Unreleased] - 2026-02-23
+## [Unreleased] - 2026-03-04
 
 ### Security
 
@@ -152,6 +152,8 @@ The git repositories are hosted at the following sites:
 
 ### Changed
 
+* Changed bacfile_strdup to bacnet_strdup function to replace POSIX strdup
+  and update bacfile to use bacnet_strdup. (#1251)
 * Changed PositiveInteger present-value datatype to
   BACNET_UNSIGNED_INTEGER. (#1246)
 * Changed BACFILE define dependencies to reflect bacfile-posix.c dependence

src/bacnet/bacstr.c

@@ -2136,3 +2136,18 @@ int bacnet_snprintf(
 
     return write_length;
 }
+
+/**
+ * @brief duplicate a string (replacement for POSIX strdup)
+ * @param  s - string to duplicate
+ * @return a pointer to a new string on success, or a null pointer
+ */
+char *bacnet_strdup(const char *s)
+{
+    size_t size = strlen(s) + 1;
+    char *p = malloc(size);
+    if (p != NULL) {
+        memcpy(p, s, size);
+    }
+    return p;
+}

src/bacnet/bacstr.h

@@ -238,6 +238,8 @@ char *bacnet_trim(char *str, const char *trimmedchars);
 
 BACNET_STACK_EXPORT
 char *bacnet_stptok(const char *s, char *tok, size_t toklen, const char *brk);
+BACNET_STACK_EXPORT
+char *bacnet_strdup(const char *s);
 
 #ifdef __cplusplus
 }

src/bacnet/basic/object/bacfile.c

@@ -116,21 +116,6 @@ void BACfile_Writable_Property_List(
     }
 }
 
-/**
- * @brief duplicate a string (replacement for POSIX strdup)
- * @param  s - string to duplicate
- * @return a pointer to a new string on success, or a null pointer
- */
-static char *bacfile_strdup(const char *s)
-{
-    size_t size = strlen(s) + 1;
-    char *p = malloc(size);
-    if (p != NULL) {
-        memcpy(p, s, size);
-    }
-    return p;
-}
-
 /**
  * @brief For a given object instance-number, returns the pathname
  * @param  object_instance - object-instance number of the object
@@ -161,7 +146,7 @@ void bacfile_pathname_set(uint32_t object_instance, const char *pathname)
     pObject = Keylist_Data(Object_List, object_instance);
     if (pObject) {
         free(pObject->Pathname);
-        pObject->Pathname = bacfile_strdup(pathname);
+        pObject->Pathname = bacnet_strdup(pathname);
     }
 }
 
@@ -245,7 +230,7 @@ bool bacfile_object_name_set(uint32_t object_instance, const char *new_name)
     if (pObject) {
         status = true;
         free(pObject->Object_Name);
-        pObject->Object_Name = bacfile_strdup(new_name);
+        pObject->Object_Name = bacnet_strdup(new_name);
     }
 
     return status;
@@ -698,7 +683,7 @@ void bacfile_file_type_set(uint32_t object_instance, const char *mime_type)
     pObject = Keylist_Data(Object_List, object_instance);
     if (pObject) {
         free(pObject->File_Type);
-        pObject->File_Type = bacfile_strdup(mime_type);
+        pObject->File_Type = bacnet_strdup(mime_type);
     }
 }
 
@@ -1314,6 +1299,9 @@ bool bacfile_delete(uint32_t object_instance)
 
     pObject = Keylist_Data_Delete(Object_List, object_instance);
     if (pObject) {
+        free(pObject->Pathname);
+        free(pObject->File_Type);
+        free(pObject->Object_Name);
         free(pObject);
         status = true;
     }