1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2008-2020 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#define _GNU_SOURCE
19#include <unistd.h>
20#include <sys/uio.h>
21
22void
23marker1 (void)
24{
25}
26
27void
28marker2 (void)
29{
30}
31
32int fds[2] = { -1, -1 };
33char buf[5];
34const struct iovec v[4] = {
35  { &buf[1], 1 },
36  { &buf[0], 1 },
37  { &buf[3], 1 },
38  { &buf[2], 1 },
39};
40
41int
42main (void)
43{
44  marker1 ();
45  pipe (fds);
46  write (fds[1], "UNIX", 4);
47  readv (fds[0], v, 4);
48  marker2 ();
49  return 0;
50}
51