1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include "it_test_signal.h"
32 #include "sys/shm.h"
33
Testcase(VOID)34 static UINT32 Testcase(VOID)
35 {
36 int pipeFd[2], ret, spid; // 2, pipe return 2 file descripter
37 char buffer[20]; // 20, target buffer size
38 int *sharedflag = NULL;
39 int shmid;
40
41 ret = pipe(pipeFd);
42 ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT1);
43 shmid = shmget(static_cast<key_t>(IPC_PRIVATE), sizeof(int), 0666 | IPC_CREAT); // 0666 the authority of the shm
44 ICUNIT_ASSERT_NOT_EQUAL(shmid, -1, shmid);
45 sharedflag = (int *)shmat(shmid, NULL, 0);
46 *sharedflag = 0;
47
48 spid = fork();
49 ICUNIT_GOTO_NOT_EQUAL(spid, -1, spid, EXIT1);
50 if (spid == 0) {
51 sharedflag = (int *)shmat(shmid, NULL, 0);
52 close(pipeFd[0]);
53 ret = write(pipeFd[1], "hello world", 12); // 12, "hello world" length and '\0'
54 printf("write first status: %d\n", ret);
55 if (ret != 12) { // 12, "hello world" length and '\0'
56 exit(11); // 11, the value of son process unexpected exit, convenient to debug
57 }
58 *sharedflag = 1;
59 close(pipeFd[1]);
60 exit(RED_FLAG);
61 }
62 close(pipeFd[1]);
63 // waitting for the sub process has written the sentence
64 while (*sharedflag != 1) {
65 usleep(1);
66 }
67 ret = read(pipeFd[0], buffer, 12); // 12, "hello world" length and '\0'
68 ICUNIT_GOTO_EQUAL(ret, 12, ret, EXIT); // 12, "hello world" length and '\0'
69 ret = strcmp(buffer, "hello world");
70 ICUNIT_GOTO_EQUAL(ret, 0, ret, EXIT);
71 printf("read pipe success: %s\n", buffer);
72 wait(&ret);
73 printf("son return status: %d\n", WEXITSTATUS(ret));
74 ICUNIT_GOTO_EQUAL(WEXITSTATUS(ret), RED_FLAG, WEXITSTATUS(ret), EXIT);
75 printf("pipe ok\n");
76 close(pipeFd[0]);
77 return LOS_OK;
78 EXIT:
79 close(pipeFd[0]);
80 EXIT1:
81 return LOS_NOK;
82 }
83
ItIpcPipe002(void)84 VOID ItIpcPipe002(void)
85 {
86 TEST_ADD_CASE(__FUNCTION__, Testcase, TEST_LIB, TEST_LIBC, TEST_LEVEL1, TEST_FUNCTION);
87 }
88