Support binutils 2.20.
[plash-glibc.git] / posix / tst-nice.c
blob2b16ceccac490b5bf71374e9f2dce43419712231
1 /* Copyright (C) 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <stdio.h>
21 #include <unistd.h>
24 /* Test that nice() does not incorrectly return 0. */
25 static int
26 do_test (void)
28 int ret;
29 const int incr = 10;
30 int old;
32 /* Discover current nice value. */
33 errno = 0;
34 old = nice (0);
35 if (old == -1 && errno != 0)
37 printf ("break: nice(%d) return: %d, %m\n", 0, old);
38 return 1;
41 /* Nice ourselves up. */
42 errno = 0;
43 ret = nice (incr);
44 if (ret == -1 && errno != 0)
46 printf ("break: nice(%d) return: %d, %m\n", incr, ret);
47 return 1;
50 /* Check for return value being zero when it shouldn't. Cannot simply
51 check for expected value since nice values are capped at 2^n-1.
52 But we assume that we didn't start at the cap and so should have
53 increased some. */
54 if (ret <= old)
56 printf ("FAIL: retval (%d) of nice(%d) != %d\n", ret, incr, old + incr);
57 return 1;
60 printf ("PASS: nice(%d) from %d return: %d\n", incr, old, ret);
62 return 0;
65 #define TEST_FUNCTION do_test ()
66 #include "../test-skeleton.c"