| /* Copyright (C) 2003-2014 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #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; |
| int old; |
| |
| /* Discover current nice value. */ |
| errno = 0; |
| old = nice (0); |
| if (old == -1 && errno != 0) |
| { |
| printf ("break: nice(%d) return: %d, %m\n", 0, old); |
| return 1; |
| } |
| |
| /* Nice ourselves up. */ |
| errno = 0; |
| ret = nice (incr); |
| if (ret == -1 && errno != 0) |
| { |
| printf ("break: nice(%d) return: %d, %m\n", incr, ret); |
| 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. |
| But we assume that we didn't start at the cap and so should have |
| increased some. */ |
| if (ret <= old) |
| { |
| printf ("FAIL: retval (%d) of nice(%d) != %d\n", ret, incr, old + incr); |
| return 1; |
| } |
| |
| printf ("PASS: nice(%d) from %d return: %d\n", incr, old, ret); |
| |
| return 0; |
| } |
| |
| #define TEST_FUNCTION do_test () |
| #include "../test-skeleton.c" |