_IONBF
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdin, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(outf, NULL, _IONBF, 0);
setvbuf(outf, NULL, _IONBF, 0);
setvbuf(outf, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
(void) setvbuf(fp, buf, buf ? _IOFBF : _IONBF, BUFSIZ);
(void)setvbuf(fp, buf, buf ? _IOFBF : _IONBF, size);
if (mode != _IONBF)
if (mode == _IONBF)
errors += dotest(_IONBF, NULL, 0);
case _IONBF:
TEST_UNCHANGED(setvbuf(f, buffer, _IONBF, BUFSIZ));
TEST_UNCHANGED(setvbuf(f, NULL, _IONBF, 0));
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stderr, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
if (setvbuf(fp, NULL, _IONBF, 0)) {
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdout, NULL, _IONBF, 0);
setvbuf(stdin, NULL, _IONBF, 0);
setvbuf(stdin, NULL, _IONBF, 0);
setvbuf(stdin, NULL, _IONBF, 0);
setvbuf(stdin, (char *) NULL, _IONBF, 0);
setvbuf(stdout, (char *)NULL, _IONBF, 0);
setvbuf(f, NULL, _IONBF, 0);
setvbuf(debug, NULL, _IONBF, 0);
setvbuf(fp, NULL, _IONBF, 0);