92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2007
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* 13/11/08 Gowrishankar M <gowrishankar.m@in.ibm.com>
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* Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
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*/
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/*\
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* [Description]
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*
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* Clone a process with CLONE_NEWPID flag, block SIGUSR1 signal before sending
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* it from parent and check if it's received once SIGUSR1 signal is unblocked.
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*/
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#define _GNU_SOURCE 1
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#include <signal.h>
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#include "tst_test.h"
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#include "lapi/sched.h"
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static volatile int signals;
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static volatile int last_signo;
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static void child_signal_handler(LTP_ATTRIBUTE_UNUSED int sig, siginfo_t *si, LTP_ATTRIBUTE_UNUSED void *unused)
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{
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last_signo = si->si_signo;
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signals++;
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}
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static int child_func(LTP_ATTRIBUTE_UNUSED void *arg)
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{
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struct sigaction sa;
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sigset_t newset;
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pid_t cpid, ppid;
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cpid = getpid();
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ppid = getppid();
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if (cpid != 1 || ppid != 0) {
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tst_res(TFAIL, "Got unexpected result of cpid=%d ppid=%d", cpid, ppid);
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return 0;
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}
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SAFE_SIGEMPTYSET(&newset);
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SAFE_SIGADDSET(&newset, SIGUSR1);
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SAFE_SIGPROCMASK(SIG_BLOCK, &newset, 0);
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TST_CHECKPOINT_WAKE_AND_WAIT(0);
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sa.sa_flags = SA_SIGINFO;
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SAFE_SIGFILLSET(&sa.sa_mask);
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sa.sa_sigaction = child_signal_handler;
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SAFE_SIGACTION(SIGUSR1, &sa, NULL);
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SAFE_SIGPROCMASK(SIG_UNBLOCK, &newset, 0);
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if (signals != 1) {
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tst_res(TFAIL, "Received %d signals", signals);
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return 0;
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}
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if (last_signo != SIGUSR1) {
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tst_res(TFAIL, "Received %s signal", tst_strsig(last_signo));
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return 0;
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}
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tst_res(TPASS, "Received SIGUSR1 signal after unblock");
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return 0;
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}
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static void run(void)
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{
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int ret;
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ret = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, child_func, NULL);
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if (ret < 0)
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tst_brk(TBROK | TERRNO, "clone failed");
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TST_CHECKPOINT_WAIT(0);
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SAFE_KILL(ret, SIGUSR1);
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TST_CHECKPOINT_WAKE(0);
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}
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static struct tst_test test = {
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.test_all = run,
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.needs_root = 1,
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.needs_checkpoints = 1,
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};
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