Added backing signatures

src/utils.c

@@ -343,6 +343,60 @@ Result write_file(const char* path, const char* string) {
 	return result;
 }
 
+Result copy_file(const char* src_path, const char* dst_path, mode_t mode) {
+	// Open the source file
+	int src_fd = open(src_path, O_RDONLY);
+	if (src_fd == -1) {
+		log_message(LOG_LEVEL_ERROR, "Failed to open the source file '%s' (%s).", src_path, strerror(errno));
+		return FAILURE;
+	}
+
+	// Open the destination file
+	int dst_fd = open(dst_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
+	if (dst_fd == -1) {
+		log_message(LOG_LEVEL_ERROR, "Failed to open the destination file '%s' (%s).", dst_path, strerror(errno));
+
+		close(src_fd);
+		return FAILURE;
+	}
+
+	// Copy the file
+	char buffer[4096];
+	ssize_t bytes_read;
+
+	while ((bytes_read = read(src_fd, buffer, sizeof(buffer))) > 0) {
+		ssize_t bytes_written = 0;
+
+		while (bytes_written < bytes_read) {
+			ssize_t result = write(dst_fd, buffer + bytes_written, bytes_read - bytes_written);
+			if (result == -1) {
+				log_message(LOG_LEVEL_ERROR, "Failed to write to the destination file '%s' (%s).", dst_path, strerror(errno));
+
+				close(src_fd);
+				close(dst_fd);
+				return FAILURE;
+			}
+
+			bytes_written += result;
+		}
+	}
+
+	// Check if an error occurred
+	if (bytes_read == -1) {
+		log_message(LOG_LEVEL_ERROR, "Failed to read from the source file '%s' (%s).", src_path, strerror(errno));
+
+		close(src_fd);
+		close(dst_fd);
+		return FAILURE;
+	}
+
+	// Close the files
+	close(src_fd);
+	close(dst_fd);
+
+	return SUCCESS;
+}
+
 Result format_size(uint64_t size, char** out_string) {
 	*out_string = NULL;