102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022 FUJITSU LIMITED. All rights reserved.
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* Author: Yang Xu <xuyang2018.jy@fujitsu.com>
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*/
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/*\
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* [Description]
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*
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* Basic pidfd_getfd() test:
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*
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* - the close-on-exec flag is set on the file descriptor returned by
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* pidfd_getfd
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* - use kcmp to check whether a file descriptor idx1 in the process pid1
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* refers to the same open file description as file descriptor idx2 in
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* the process pid2
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "tst_test.h"
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#include "lapi/kcmp.h"
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#include "tst_safe_macros.h"
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#include "lapi/pidfd.h"
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#define TESTFILE "testfile"
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static int fds[2] = {-1, -1};
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static int pidfd = -1;
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static void do_child(void)
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{
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int fd;
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SAFE_CLOSE(fds[0]);
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fd = SAFE_CREAT(TESTFILE, 0644);
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SAFE_WRITE(SAFE_WRITE_ALL, fds[1], &fd, sizeof(fd));
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TST_CHECKPOINT_WAIT(0);
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SAFE_CLOSE(fd);
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SAFE_CLOSE(fds[1]);
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exit(0);
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}
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static void run(void)
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{
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int flag, pid, targetfd, remotefd;
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SAFE_PIPE(fds);
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pid = SAFE_FORK();
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if (!pid)
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do_child();
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SAFE_CLOSE(fds[1]);
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TST_PROCESS_STATE_WAIT(pid, 'S', 0);
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pidfd = SAFE_PIDFD_OPEN(pid, 0);
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SAFE_READ(1, fds[0], &targetfd, sizeof(targetfd));
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TST_EXP_FD_SILENT(pidfd_getfd(pidfd, targetfd, 0),
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"pidfd_getfd(%d, %d , 0)", pidfd, targetfd);
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remotefd = TST_RET;
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flag = SAFE_FCNTL(remotefd, F_GETFD);
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if (!(flag & FD_CLOEXEC))
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tst_res(TFAIL, "pidfd_getfd() didn't set close-on-exec flag");
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TST_EXP_VAL_SILENT(kcmp(getpid(), pid, KCMP_FILE, remotefd, targetfd), 0);
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tst_res(TPASS, "pidfd_getfd(%d, %d, 0) passed", pidfd, targetfd);
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TST_CHECKPOINT_WAKE(0);
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SAFE_CLOSE(remotefd);
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SAFE_CLOSE(pidfd);
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SAFE_CLOSE(fds[0]);
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tst_reap_children();
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}
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static void setup(void)
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{
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pidfd_open_supported();
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pidfd_getfd_supported();
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}
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static void cleanup(void)
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{
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if (fds[0] > -1)
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SAFE_CLOSE(fds[0]);
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if (fds[1] > -1)
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SAFE_CLOSE(fds[1]);
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if (pidfd > -1)
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SAFE_CLOSE(pidfd);
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}
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static struct tst_test test = {
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.needs_root = 1,
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.needs_checkpoints = 1,
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.forks_child = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = run,
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};
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