| 1 | /* Basic test for getauxval. |
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| 2 | Copyright (C) 2022-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <unistd.h> |
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| 20 | #include <stdio.h> |
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| 21 | #include <support/check.h> |
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| 22 | #include <sys/auxv.h> |
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| 23 | |
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| 24 | static int missing; |
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| 25 | static int mismatch; |
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| 26 | |
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| 27 | static void |
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| 28 | check_nonzero (unsigned long t, const char *s) |
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| 29 | { |
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| 30 | unsigned long v = getauxval (type: t); |
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| 31 | printf (format: "%s: %lu (0x%lx)\n" , s, v, v); |
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| 32 | if (v == 0) |
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| 33 | missing++; |
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| 34 | } |
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| 35 | |
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| 36 | static void |
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| 37 | check_eq (unsigned long t, const char *s, unsigned long want) |
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| 38 | { |
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| 39 | unsigned long v = getauxval (type: t); |
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| 40 | printf (format: "%s: %lu want: %lu\n" , s, v, want); |
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| 41 | if (v != want) |
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| 42 | mismatch++; |
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| 43 | } |
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| 44 | |
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| 45 | #define NZ(x) check_nonzero (x, #x) |
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| 46 | #define EQ(x, want) check_eq (x, #x, want) |
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| 47 | |
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| 48 | static int |
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| 49 | do_test (void) |
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| 50 | { |
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| 51 | /* These auxv entries should be non-zero on Linux. */ |
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| 52 | NZ (AT_PHDR); |
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| 53 | NZ (AT_PHENT); |
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| 54 | NZ (AT_PHNUM); |
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| 55 | NZ (AT_PAGESZ); |
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| 56 | NZ (AT_ENTRY); |
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| 57 | NZ (AT_CLKTCK); |
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| 58 | NZ (AT_RANDOM); |
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| 59 | NZ (AT_EXECFN); |
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| 60 | if (missing) |
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| 61 | FAIL_EXIT1 ("Found %d missing auxv entries.\n" , missing); |
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| 62 | |
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| 63 | /* Check against syscalls. */ |
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| 64 | EQ (AT_UID, getuid ()); |
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| 65 | EQ (AT_EUID, geteuid ()); |
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| 66 | EQ (AT_GID, getgid ()); |
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| 67 | EQ (AT_EGID, getegid ()); |
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| 68 | if (mismatch) |
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| 69 | FAIL_EXIT1 ("Found %d mismatching auxv entries.\n" , mismatch); |
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| 70 | |
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| 71 | return 0; |
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| 72 | } |
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| 73 | |
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| 74 | #include <support/test-driver.c> |
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| 75 | |
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