c_special
ret = c_special(fd1, file1, skip1, fd2, file2, skip2, limit);
int c_special(int, const char *, off_t, int, const char *, off_t, off_t);
return (c_special(fd1, file1, skip1, fd2, file2, skip2, limit));
return (c_special(fd1, file1, skip1, fd2, file2, skip2, limit));