preserve_fd_acls
int preserve_fd_acls(int, int);
if (pflag && preserve_fd_acls(from_fd, to_fd) != 0)
if ((ret = preserve_fd_acls(source_fd, dest_fd)) != 0) {
preserve_fd_acls(from_fd, to_fd, from, to);
static void preserve_fd_acls(int, int, const char *, const char *);