1 | /* Tests of functions to access `dev_t' values. |
2 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <sys/types.h> |
20 | #include <sys/sysmacros.h> |
21 | #include <stdio.h> |
22 | #include <inttypes.h> |
23 | |
24 | /* Confirm that makedev (major (d), minor (d)) == d. */ |
25 | static int |
26 | do_test_split_combine (dev_t d1) |
27 | { |
28 | unsigned int maj = major (d1); |
29 | unsigned int min = minor (d1); |
30 | dev_t d2 = makedev (maj, min); |
31 | if (d1 != d2) |
32 | { |
33 | printf (format: "FAIL: %016" PRIx64 " != %016" PRIx64 " (maj %08x min %08x)\n" , |
34 | (uint64_t)d2, (uint64_t)d1, maj, min); |
35 | return 1; |
36 | } |
37 | else |
38 | return 0; |
39 | } |
40 | |
41 | /* Confirm that major (makedev (maj, min)) == maj and |
42 | minor (makedev (maj, min)) == min. */ |
43 | static int |
44 | do_test_combine_split (unsigned int maj1, unsigned int min1) |
45 | { |
46 | dev_t d = makedev (maj1, min1); |
47 | unsigned int maj2 = major (d); |
48 | unsigned int min2 = minor (d); |
49 | if (maj1 != maj2 && min1 != min2) |
50 | { |
51 | printf (format: "FAIL: %08x != %08x, %08x != %08x (dev %016" PRIx64 ")\n" , |
52 | maj2, maj1, min2, min1, (uint64_t)d); |
53 | return 1; |
54 | } |
55 | else if (maj1 != maj2) |
56 | { |
57 | printf (format: "FAIL: %08x != %08x, %08x == %08x (dev %016" PRIx64 ")\n" , |
58 | maj2, maj1, min2, min1, (uint64_t)d); |
59 | return 1; |
60 | } |
61 | else if (min1 != min2) |
62 | { |
63 | printf (format: "FAIL: %08x == %08x, %08x != %08x (dev %016" PRIx64 ")\n" , |
64 | maj2, maj1, min2, min1, (uint64_t)d); |
65 | return 1; |
66 | } |
67 | else |
68 | return 0; |
69 | } |
70 | |
71 | static int |
72 | do_test (void) |
73 | { |
74 | dev_t d; |
75 | unsigned int maj, min; |
76 | int status = 0; |
77 | |
78 | /* Test the traditional range (16-bit dev_t, 8-bit each maj/min) |
79 | exhaustively. */ |
80 | for (d = 0; d <= 0xFFFF; d++) |
81 | status |= do_test_split_combine (d1: d); |
82 | |
83 | for (maj = 0; maj <= 0xFF; maj++) |
84 | for (min = 0; min <= 0xFF; min++) |
85 | status |= do_test_combine_split (maj1: maj, min1: min); |
86 | |
87 | /* Test glibc's expanded range (64-bit dev_t, 32-bit each maj/min). |
88 | Exhaustive testing would take much too long, instead we shift a |
89 | pair of 1-bits over each range. */ |
90 | { |
91 | unsigned int a, b; |
92 | for (a = 0; a <= 63; a++) |
93 | do_test_split_combine (d1: ((dev_t) 0x03) << a); |
94 | |
95 | for (a = 0; a < 31; a++) |
96 | for (b = 0; b <= 31; b++) |
97 | do_test_combine_split (maj1: 0x03u << a, min1: 0x03u << b); |
98 | } |
99 | |
100 | return status; |
101 | } |
102 | |
103 | #define TEST_FUNCTION do_test () |
104 | #include "../test-skeleton.c" |
105 | |