1 | /* Basic test for getauxval. |
2 | Copyright (C) 2022-2024 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 <unistd.h> |
20 | #include <stdio.h> |
21 | #include <support/check.h> |
22 | #include <sys/auxv.h> |
23 | |
24 | static int missing; |
25 | static int mismatch; |
26 | |
27 | static void |
28 | check_nonzero (unsigned long t, const char *s) |
29 | { |
30 | unsigned long v = getauxval (type: t); |
31 | printf (format: "%s: %lu (0x%lx)\n" , s, v, v); |
32 | if (v == 0) |
33 | missing++; |
34 | } |
35 | |
36 | static void |
37 | check_eq (unsigned long t, const char *s, unsigned long want) |
38 | { |
39 | unsigned long v = getauxval (type: t); |
40 | printf (format: "%s: %lu want: %lu\n" , s, v, want); |
41 | if (v != want) |
42 | mismatch++; |
43 | } |
44 | |
45 | #define NZ(x) check_nonzero (x, #x) |
46 | #define EQ(x, want) check_eq (x, #x, want) |
47 | |
48 | static int |
49 | do_test (void) |
50 | { |
51 | /* These auxv entries should be non-zero on Linux. */ |
52 | NZ (AT_PHDR); |
53 | NZ (AT_PHENT); |
54 | NZ (AT_PHNUM); |
55 | NZ (AT_PAGESZ); |
56 | NZ (AT_ENTRY); |
57 | NZ (AT_CLKTCK); |
58 | NZ (AT_RANDOM); |
59 | NZ (AT_EXECFN); |
60 | if (missing) |
61 | FAIL_EXIT1 ("Found %d missing auxv entries.\n" , missing); |
62 | |
63 | /* Check against syscalls. */ |
64 | EQ (AT_UID, getuid ()); |
65 | EQ (AT_EUID, geteuid ()); |
66 | EQ (AT_GID, getgid ()); |
67 | EQ (AT_EGID, getegid ()); |
68 | if (mismatch) |
69 | FAIL_EXIT1 ("Found %d mismatching auxv entries.\n" , mismatch); |
70 | |
71 | return 0; |
72 | } |
73 | |
74 | #include <support/test-driver.c> |
75 | |