65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
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/* Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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/* Test that nice() does not incorrectly return 0. */
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static int
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do_test (void)
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{
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int ret, expected;
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const int incr = 10;
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/* Discover current nice value. */
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errno = 0;
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ret = nice (0);
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if (ret == -1 && errno != 0)
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{
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printf ("break: nice(%d) return: %d, errno: %d\n", 0, ret, errno);
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return 1;
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}
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expected = ret + incr;
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/* Nice ourselves up. */
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errno = 0;
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ret = nice (incr);
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if (ret == -1 && errno != 0)
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{
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printf ("break: nice(%d) return: %d, errno: %d\n", incr, ret, errno);
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return 1;
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}
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/* Check for return value being zero when it shouldn't. Cannot simply
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check for expected value since nice values are capped at 2^n-1. */
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if (ret == 0 && ret != expected)
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{
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printf ("fail: retval (%d) of nice(%d) != %d\n", ret, incr, expected);
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return 1;
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}
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printf ("pass: nice(%d) return: %d\n", incr, ret);
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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