/usr/include/nih/test_divert.h is in libnih-dev 1.0.3-6ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright © 2009 Scott James Remnant <scott@netsplit.com>.
* Copyright © 2009 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef NIH_TEST_DIVERT_H
#define NIH_TEST_DIVERT_H
#ifndef NIH_IN_TEST_H
# error "This header may only be included by <nih/test.h>"
#endif /* NIH_IN_TEST_H */
#include <stdio.h>
#include <assert.h>
#include <unistd.h>
/**
* TEST_DIVERT_STDOUT_FD:
* @_fd: fd to send standard output to.
*
* This macro diverts standard output to a different file descriptor
* for the duration of a block of code that should follow it.
**/
#define TEST_DIVERT_STDOUT_FD(_fd) \
for (int _test_stdout = 0, _test_oldstdout = dup (STDOUT_FILENO); \
_test_stdout < 3; _test_stdout++) \
if (_test_stdout < 1) { \
fflush (stdout); \
assert (dup2 ((_fd), STDOUT_FILENO) >= 0); \
} else if (_test_stdout > 1) { \
fflush (stdout); \
assert (dup2 (_test_oldstdout, STDOUT_FILENO) >= 0); \
close (_test_oldstdout); \
} else
/**
* TEST_DIVERT_STDOUT:
* @_file: FILE to send standard output to.
*
* This macro diverts standard output to a different file for the duration
* of a block of code that should follow it.
*/
#define TEST_DIVERT_STDOUT(_file) \
TEST_DIVERT_STDOUT_FD (fileno (_file))
/**
* TEST_DIVERT_STDERR_FD:
* @_fd: fd to send standard error to.
*
* This macro diverts standard error to a different file descriptor for the
* duration of a block of code that should follow it.
*/
#define TEST_DIVERT_STDERR_FD(_fd) \
for (int _test_stderr = 0, _test_oldstderr = dup (STDERR_FILENO); \
_test_stderr < 3; _test_stderr++) \
if (_test_stderr < 1) { \
fflush (stderr); \
assert (dup2 ((_fd), STDERR_FILENO) >= 0); \
} else if (_test_stderr > 1) { \
fflush (stderr); \
assert (dup2 (_test_oldstderr, STDERR_FILENO) >= 0); \
close (_test_oldstderr); \
} else
/**
* TEST_DIVERT_STDERR:
* @_file: FILE to send standard error to.
*
* This macro diverts standard error to a different file for the duration
* of a block of code that should follow it.
*/
#define TEST_DIVERT_STDERR(_file) \
TEST_DIVERT_STDERR_FD (fileno (_file))
#endif /* NIH_TEST_DIVERT_H */
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