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