/* 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; 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"