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105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/* Tests of functions to access `dev_t' values.
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Copyright (C) 2016-2023 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, see
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<https://www.gnu.org/licenses/>. */
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#include <sys/types.h>
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#include <sys/sysmacros.h>
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#include <stdio.h>
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#include <inttypes.h>
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/* Confirm that makedev (major (d), minor (d)) == d. */
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static int
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do_test_split_combine (dev_t d1)
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{
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unsigned int maj = major (d1);
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unsigned int min = minor (d1);
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dev_t d2 = makedev (maj, min);
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if (d1 != d2)
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{
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printf ("FAIL: %016" PRIx64 " != %016" PRIx64 " (maj %08x min %08x)\n",
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(uint64_t)d2, (uint64_t)d1, maj, min);
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return 1;
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}
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else
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return 0;
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}
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/* Confirm that major (makedev (maj, min)) == maj and
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minor (makedev (maj, min)) == min. */
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static int
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do_test_combine_split (unsigned int maj1, unsigned int min1)
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{
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dev_t d = makedev (maj1, min1);
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unsigned int maj2 = major (d);
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unsigned int min2 = minor (d);
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if (maj1 != maj2 && min1 != min2)
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{
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printf ("FAIL: %08x != %08x, %08x != %08x (dev %016" PRIx64 ")\n",
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maj2, maj1, min2, min1, (uint64_t)d);
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return 1;
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}
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else if (maj1 != maj2)
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{
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printf ("FAIL: %08x != %08x, %08x == %08x (dev %016" PRIx64 ")\n",
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maj2, maj1, min2, min1, (uint64_t)d);
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return 1;
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}
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else if (min1 != min2)
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{
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printf ("FAIL: %08x == %08x, %08x != %08x (dev %016" PRIx64 ")\n",
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maj2, maj1, min2, min1, (uint64_t)d);
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return 1;
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}
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else
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return 0;
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}
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static int
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do_test (void)
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{
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dev_t d;
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unsigned int maj, min;
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int status = 0;
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/* Test the traditional range (16-bit dev_t, 8-bit each maj/min)
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exhaustively. */
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for (d = 0; d <= 0xFFFF; d++)
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status |= do_test_split_combine (d);
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for (maj = 0; maj <= 0xFF; maj++)
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for (min = 0; min <= 0xFF; min++)
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status |= do_test_combine_split (maj, min);
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/* Test glibc's expanded range (64-bit dev_t, 32-bit each maj/min).
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Exhaustive testing would take much too long, instead we shift a
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pair of 1-bits over each range. */
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{
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unsigned int a, b;
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for (a = 0; a <= 63; a++)
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do_test_split_combine (((dev_t) 0x03) << a);
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for (a = 0; a < 31; a++)
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for (b = 0; b <= 31; b++)
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do_test_combine_split (0x03u << a, 0x03u << b);
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}
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return status;
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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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