125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#define _GNU_SOURCE
|
|
#include <errno.h>
|
|
#include <sched.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/types.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include "../kselftest.h"
|
|
#include "clone3_selftests.h"
|
|
|
|
static void nop_handler(int signo)
|
|
{
|
|
}
|
|
|
|
static int wait_for_pid(pid_t pid)
|
|
{
|
|
int status, ret;
|
|
|
|
again:
|
|
ret = waitpid(pid, &status, 0);
|
|
if (ret == -1) {
|
|
if (errno == EINTR)
|
|
goto again;
|
|
|
|
return -1;
|
|
}
|
|
|
|
if (!WIFEXITED(status))
|
|
return -1;
|
|
|
|
return WEXITSTATUS(status);
|
|
}
|
|
|
|
static void test_clone3_clear_sighand(void)
|
|
{
|
|
int ret;
|
|
pid_t pid;
|
|
struct __clone_args args = {};
|
|
struct sigaction act;
|
|
|
|
/*
|
|
* Check that CLONE_CLEAR_SIGHAND and CLONE_SIGHAND are mutually
|
|
* exclusive.
|
|
*/
|
|
args.flags |= CLONE_CLEAR_SIGHAND | CLONE_SIGHAND;
|
|
args.exit_signal = SIGCHLD;
|
|
pid = sys_clone3(&args, sizeof(args));
|
|
if (pid > 0)
|
|
ksft_exit_fail_msg(
|
|
"clone3(CLONE_CLEAR_SIGHAND | CLONE_SIGHAND) succeeded\n");
|
|
|
|
act.sa_handler = nop_handler;
|
|
ret = sigemptyset(&act.sa_mask);
|
|
if (ret < 0)
|
|
ksft_exit_fail_msg("%s - sigemptyset() failed\n",
|
|
strerror(errno));
|
|
|
|
act.sa_flags = 0;
|
|
|
|
/* Register signal handler for SIGUSR1 */
|
|
ret = sigaction(SIGUSR1, &act, NULL);
|
|
if (ret < 0)
|
|
ksft_exit_fail_msg(
|
|
"%s - sigaction(SIGUSR1, &act, NULL) failed\n",
|
|
strerror(errno));
|
|
|
|
/* Register signal handler for SIGUSR2 */
|
|
ret = sigaction(SIGUSR2, &act, NULL);
|
|
if (ret < 0)
|
|
ksft_exit_fail_msg(
|
|
"%s - sigaction(SIGUSR2, &act, NULL) failed\n",
|
|
strerror(errno));
|
|
|
|
/* Check that CLONE_CLEAR_SIGHAND works. */
|
|
args.flags = CLONE_CLEAR_SIGHAND;
|
|
pid = sys_clone3(&args, sizeof(args));
|
|
if (pid < 0)
|
|
ksft_exit_fail_msg("%s - clone3(CLONE_CLEAR_SIGHAND) failed\n",
|
|
strerror(errno));
|
|
|
|
if (pid == 0) {
|
|
ret = sigaction(SIGUSR1, NULL, &act);
|
|
if (ret < 0)
|
|
exit(EXIT_FAILURE);
|
|
|
|
if (act.sa_handler != SIG_DFL)
|
|
exit(EXIT_FAILURE);
|
|
|
|
ret = sigaction(SIGUSR2, NULL, &act);
|
|
if (ret < 0)
|
|
exit(EXIT_FAILURE);
|
|
|
|
if (act.sa_handler != SIG_DFL)
|
|
exit(EXIT_FAILURE);
|
|
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
ret = wait_for_pid(pid);
|
|
if (ret)
|
|
ksft_exit_fail_msg(
|
|
"Failed to clear signal handler for child process\n");
|
|
|
|
ksft_test_result_pass("Cleared signal handlers for child process\n");
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
ksft_print_header();
|
|
ksft_set_plan(1);
|
|
test_clone3_supported();
|
|
|
|
test_clone3_clear_sighand();
|
|
|
|
return ksft_exit_pass();
|
|
}
|