| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2003-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <errno.h> |
| 19 | #include <stdio.h> |
| 20 | #include <unistd.h> |
| 21 | |
| 22 | |
| 23 | /* Test that nice() does not incorrectly return 0. */ |
| 24 | static int |
| 25 | do_test (void) |
| 26 | { |
| 27 | int ret; |
| 28 | const int incr = 10; |
| 29 | int old; |
| 30 | |
| 31 | /* Discover current nice value. */ |
| 32 | errno = 0; |
| 33 | old = nice (0); |
| 34 | if (old == -1 && errno != 0) |
| 35 | { |
| 36 | printf ("break: nice(%d) return: %d, %m\n", 0, old); |
| 37 | return 1; |
| 38 | } |
| 39 | |
| 40 | /* Nice ourselves up. */ |
| 41 | errno = 0; |
| 42 | ret = nice (incr); |
| 43 | if (ret == -1 && errno != 0) |
| 44 | { |
| 45 | printf ("break: nice(%d) return: %d, %m\n", incr, ret); |
| 46 | return 1; |
| 47 | } |
| 48 | |
| 49 | /* Check for return value being zero when it shouldn't. Cannot simply |
| 50 | check for expected value since nice values are capped at 2^n-1. |
| 51 | But we assume that we didn't start at the cap and so should have |
| 52 | increased some. */ |
| 53 | if (ret <= old) |
| 54 | { |
| 55 | printf ("FAIL: retval (%d) of nice(%d) != %d\n", ret, incr, old + incr); |
| 56 | return 1; |
| 57 | } |
| 58 | |
| 59 | /* BZ #18086. Make sure we don't reset errno. */ |
| 60 | errno = EBADF; |
| 61 | nice (0); |
| 62 | if (errno != EBADF) |
| 63 | { |
| 64 | printf ("FAIL: errno = %i, but wanted EBADF (%i)\n", errno, EBADF); |
| 65 | return 1; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | printf ("PASS: nice(%d) from %d return: %d\n", incr, old, ret); |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | #define TEST_FUNCTION do_test () |
| 74 | #include "../test-skeleton.c" |