46 lines
1.0 KiB
C
46 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2020 FUJITSU LIMITED. All rights reserved.
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* Author: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
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*/
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/*\
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* [Description]
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*
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* Before kernel 2.6.26 we could not trace init(1) process and ptrace() would
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* fail with EPERM. This case just checks whether we can trace init(1) process
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* successfully.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <pwd.h>
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#include <config.h>
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#include <stdlib.h>
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#include "ptrace.h"
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#include "tst_test.h"
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static void verify_ptrace(void)
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{
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TEST(ptrace(PTRACE_ATTACH, 1, NULL, NULL));
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if (TST_RET == 0)
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tst_res(TPASS, "ptrace() traces init process successfully");
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else
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tst_res(TFAIL | TTERRNO,
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"ptrace() returns %ld, failed unexpectedly", TST_RET);
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/*
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* Wait until tracee is stopped by SIGSTOP otherwise detach will fail
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* with ESRCH.
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*/
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SAFE_WAITPID(1, NULL, 0);
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SAFE_PTRACE(PTRACE_DETACH, 1, NULL, NULL);
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}
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static struct tst_test test = {
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.test_all = verify_ptrace,
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.needs_root = 1,
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};
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