75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
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*
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* AUTHOR: Saji Kumar.V.R <saji.kumar@wipro.com>
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*
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* 1) ptrace() returns -1 and sets errno to ESRCH if process with
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* specified pid does not exist.
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* 2) ptrace() returns -1 and sets errno to EPERM if we are trying
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* to trace a process which is already been traced
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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 pid_t unused_pid;
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static pid_t zero_pid;
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static struct tcase {
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int request;
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pid_t *pid;
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int exp_errno;
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char *tname;
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} tcases[] = {
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{PTRACE_ATTACH, &unused_pid, ESRCH,
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"Trace a process which does not exist"},
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{PTRACE_TRACEME, &zero_pid, EPERM,
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"Trace a process which is already been traced"}
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};
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static void verify_ptrace(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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int child_pid;
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tst_res(TINFO, "%s", tc->tname);
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child_pid = SAFE_FORK();
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if (!child_pid) {
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if (tc->exp_errno == EPERM)
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SAFE_PTRACE(PTRACE_TRACEME, 0, NULL, NULL);
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TEST(ptrace(tc->request, *(tc->pid), NULL, NULL));
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if (TST_RET == 0) {
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tst_res(TFAIL, "ptrace() succeeded unexpectedly");
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exit(1);
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}
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if (tc->exp_errno == TST_ERR)
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tst_res(TPASS | TTERRNO, "ptrace() failed as expected");
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else
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tst_res(TFAIL | TTERRNO, "ptrace() failed unexpectedly, expected %s",
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tst_strerrno(tc->exp_errno));
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}
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tst_reap_children();
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}
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static void setup(void)
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{
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unused_pid = tst_get_unused_pid();
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}
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static struct tst_test test = {
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.test = verify_ptrace,
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.forks_child = 1,
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};
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