SM_IO_BUFSIZ
w = (*fp->f_write)(fp, p, SM_MIN(len, SM_IO_BUFSIZ));
*bufsize = SM_IO_BUFSIZ;
*bufsize = SM_IO_BUFSIZ;
*bufsize = SM_IO_BUFSIZ;
p = sm_malloc_x((size_t) SM_IO_BUFSIZ);
fp->f_ub.smb_size = SM_IO_BUFSIZ;
p += SM_IO_BUFSIZ - sizeof(fp->f_ubuf);
unsigned char buf[SM_IO_BUFSIZ];
SM_IO_NBF, SM_IO_BUFSIZ);
SM_IO_BUFSIZ);