#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <errno.h> #include "sysfs_utils.h"#include "usbip_common.h" int write_sysfs_attribute(const char *attr_path, const char *new_value,			  size_t len){	int fd;	int length; 	fd = open(attr_path, O_WRONLY);	if (fd < 0) {		dbg("error opening attribute %s", attr_path);		return -1;	} 	length = write(fd, new_value, len);	if (length < 0) {		dbg("error writing to attribute %s", attr_path);		close(fd);		return -1;	} 	close(fd); 	return 0;}