1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <fcntl.h>
17 #include <stdio.h>
18 #include <string.h>
19 #include <sys/uio.h>
20 #include <unistd.h>
21 #include "test.h"
22
23 /**
24 * @tc.name : writev_0100
25 * @tc.desc : Writes iovcnt buffers of data described by iov to the file associated with fd
26 * @tc.level : Level 0
27 */
writev_0100(void)28 void writev_0100(void)
29 {
30 char *str0 = "test ";
31 char *str1 = "writev\n";
32 struct iovec iov[2];
33
34 iov[0].iov_base = str0;
35 iov[0].iov_len = strlen(str0) + 1;
36 iov[1].iov_base = str1;
37 iov[1].iov_len = strlen(str1) + 1;
38
39 ssize_t result = writev(STDOUT_FILENO, iov, 2);
40 if (result != (iov[0].iov_len + iov[1].iov_len)) {
41 t_error("%s writev falied", __func__);
42 }
43 }
44
45 /**
46 * @tc.name : writev_0200
47 * @tc.desc : When iovlen is equal to 0, the data in the structure iov will not be read
48 * @tc.level : Level 1
49 */
writev_0200(void)50 void writev_0200(void)
51 {
52 char *str0 = "test ";
53 char *str1 = "writev\n";
54 struct iovec iov[2];
55
56 iov[0].iov_base = str0;
57 iov[0].iov_len = 0;
58 iov[1].iov_base = str1;
59 iov[1].iov_len = strlen(str1) + 1;
60
61 ssize_t result = writev(STDOUT_FILENO, iov, 2);
62 if (result != (iov[0].iov_len + iov[1].iov_len)) {
63 t_error("%s writev falied", __func__);
64 }
65 }
66
67 /**
68 * @tc.name : writev_0300
69 * @tc.desc : Invalid parameter input
70 * @tc.level : Level 2
71 */
writev_0300(void)72 void writev_0300(void)
73 {
74 ssize_t result = writev(-1, NULL, -1);
75 if (result != -1) {
76 t_error("%s writev should falied", __func__);
77 }
78 }
79
main(int argc,char * argv[])80 int main(int argc, char *argv[])
81 {
82 writev_0100();
83 writev_0200();
84 writev_0300();
85 return t_status;
86 }