58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2020 Viresh Kumar <viresh.kumar@linaro.org>
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*
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* Description:
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* This program opens the PID file descriptor of the child process created with
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* fork(). It then uses poll to monitor the file descriptor for process exit, as
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* indicated by an EPOLLIN event.
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*/
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#include <poll.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "tst_test.h"
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#include "lapi/pidfd_open.h"
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static void run(void)
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{
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struct pollfd pollfd;
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int fd, ready;
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pid_t pid;
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pid = SAFE_FORK();
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if (!pid) {
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TST_CHECKPOINT_WAIT(0);
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exit(EXIT_SUCCESS);
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}
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TEST(pidfd_open(pid, 0));
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fd = TST_RET;
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if (fd == -1)
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tst_brk(TFAIL | TTERRNO, "pidfd_open() failed");
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TST_CHECKPOINT_WAKE(0);
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pollfd.fd = fd;
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pollfd.events = POLLIN;
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ready = poll(&pollfd, 1, -1);
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SAFE_CLOSE(fd);
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SAFE_WAITPID(pid, NULL, 0);
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if (ready != 1)
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tst_res(TFAIL, "poll() returned %d", ready);
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else
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tst_res(TPASS, "pidfd_open() passed");
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}
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static struct tst_test test = {
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.min_kver = "5.3",
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.test_all = run,
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.forks_child = 1,
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.needs_checkpoints = 1,
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};
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