128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2016 Fujitsu Ltd.
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* Author: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
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* Copyright (c) 2021 Xie Ziyao <xieziyao@huawei.com>
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*/
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/*\
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* [Description]
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*
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* Basic test for epoll_pwait() and epoll_pwait2().
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*
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* - With a sigmask a signal is ignored and the syscall safely waits until
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* either a file descriptor becomes ready or the timeout expires.
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*
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* - Without sigmask if signal arrives a syscall is iterrupted by a signal.
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* The call should return -1 and set errno to EINTR.
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*/
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#include <stdlib.h>
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#include <sys/epoll.h>
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#include "tst_test.h"
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#include "epoll_pwait_var.h"
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static int efd, sfd[2];
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static struct epoll_event e;
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static sigset_t signalset;
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static struct sigaction sa;
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static void sighandler(int sig LTP_ATTRIBUTE_UNUSED) {}
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static void verify_sigmask(void)
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{
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TEST(do_epoll_pwait(efd, &e, 1, -1, &signalset));
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if (TST_RET != 1) {
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tst_res(TFAIL, "do_epoll_pwait() returned %li, expected 1",
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TST_RET);
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return;
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}
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tst_res(TPASS, "do_epoll_pwait() with sigmask blocked signal");
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}
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static void verify_nonsigmask(void)
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{
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TST_EXP_FAIL(do_epoll_pwait(efd, &e, 1, -1, NULL), EINTR,
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"do_epoll_pwait() without sigmask");
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}
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static void (*testcase_list[])(void) = {verify_sigmask, verify_nonsigmask};
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static void run(unsigned int n)
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{
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char b;
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pid_t pid;
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if (!SAFE_FORK()) {
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pid = getppid();
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TST_PROCESS_STATE_WAIT(pid, 'S', 0);
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SAFE_KILL(pid, SIGUSR1);
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usleep(10000);
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SAFE_WRITE(SAFE_WRITE_ALL, sfd[1], "w", 1);
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exit(0);
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}
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testcase_list[n]();
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SAFE_READ(1, sfd[0], &b, 1);
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tst_reap_children();
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}
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static void epoll_pwait_support(void)
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{
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if (tst_variant == 0)
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epoll_pwait_supported();
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else
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epoll_pwait2_supported();
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}
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static void setup(void)
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{
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SAFE_SIGEMPTYSET(&signalset);
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SAFE_SIGADDSET(&signalset, SIGUSR1);
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sa.sa_flags = 0;
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sa.sa_handler = sighandler;
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SAFE_SIGEMPTYSET(&sa.sa_mask);
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SAFE_SIGACTION(SIGUSR1, &sa, NULL);
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epoll_pwait_info();
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epoll_pwait_support();
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SAFE_SOCKETPAIR(AF_UNIX, SOCK_STREAM, 0, sfd);
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efd = epoll_create(1);
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if (efd == -1)
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tst_brk(TBROK | TERRNO, "epoll_create()");
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e.events = EPOLLIN;
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if (epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], &e))
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tst_brk(TBROK | TERRNO, "epoll_clt(..., EPOLL_CTL_ADD, ...)");
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}
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static void cleanup(void)
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{
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if (efd > 0)
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SAFE_CLOSE(efd);
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if (sfd[0] > 0)
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SAFE_CLOSE(sfd[0]);
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if (sfd[1] > 0)
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SAFE_CLOSE(sfd[1]);
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}
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static struct tst_test test = {
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.test = run,
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.setup = setup,
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.cleanup = cleanup,
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.forks_child = 1,
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.test_variants = TEST_VARIANTS,
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.tcnt = ARRAY_SIZE(testcase_list),
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};
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