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/* Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
/* Test that nice() does not incorrectly return 0. */
static int
do_test (void)
{
int ret;
const int incr = 10;
const int expected = 10;
/* Discover current nice value. */
errno = 0;
ret = nice (0);
if (ret == -1 && errno != 0)
{
printf ("break: nice(%d) return: %d, errno: %d\n", 0, ret, errno);
return 1;
}
/* We cannot generally add up the increments since the values are
capped. So we run the test only if we initially run at level
0. */
if (ret != 0)
return 0;
/* Nice ourselves up. */
errno = 0;
ret = nice (incr);
if (ret == -1 && errno != 0)
{
printf ("break: nice(%d) return: %d, errno: %d\n", incr, ret, errno);
return 1;
}
/* Check for return value being zero when it shouldn't. Cannot simply
check for expected value since nice values are capped at 2^n-1. */
if (ret != expected)
{
printf ("fail: retval (%d) of nice(%d) != %d\n", ret, incr, expected);
return 1;
}
printf ("pass: nice(%d) return: %d\n", incr, ret);
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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