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 <errno.h>
17 #include <stdio.h>
18 #include <string.h>
19 #include <unistd.h>
20
21 #include "test.h"
22
23 const int nlen = -1;
24 const int vlen = 5;
25 const char *path = "/data/tests/libc-test/src/file.txt";
26 const char *path_n = "/data/tests/libc-test/src/files.txt";
27 const char *content = "Hello world!";
28
29 #define CONTENT_LENGTH (13)
30
31 /**
32 * @tc.name : truncate_0100
33 * @tc.desc : truncate a file to a specified length
34 * @tc.level : Level 0
35 */
truncate_0100(void)36 void truncate_0100(void)
37 {
38 FILE *f = fopen(path_n, "a");
39 if (f == NULL) {
40 t_error("%s failed: fopen\n", __func__);
41 return;
42 }
43 fputs(content, f);
44 fclose(f);
45 int result = truncate(path_n, 0);
46 if (result != 0) {
47 t_error("%s failed: result = %d\n", __func__, result);
48 return;
49 }
50 remove(path_n);
51 }
52
53 /**
54 * @tc.name : truncate_0200
55 * @tc.desc : truncate a file to a specified length
56 * @tc.level : Level 1
57 */
truncate_0200(void)58 void truncate_0200(void)
59 {
60 FILE *f = fopen(path, "a");
61 if (f == NULL) {
62 t_error("%s failed: fopen\n", __func__);
63 return;
64 }
65
66 fputs(content, f);
67 fclose(f);
68
69 int result = truncate(path, vlen);
70 if (result != 0) {
71 remove(path);
72
73 t_error("%s failed: result = %d\n", __func__, result);
74 return;
75 }
76
77 f = fopen(path, "r");
78 if (f == NULL) {
79 t_error("%s failed: fopen\n", __func__);
80 return;
81 }
82
83 char buf[CONTENT_LENGTH] = {0};
84 fgets(buf, sizeof(buf) / sizeof(char), f);
85 fclose(f);
86
87 if (strlen(buf) != vlen) {
88 remove(path);
89
90 t_error("%s failed: buf = %s\n", __func__, buf);
91 return;
92 }
93 }
94
95 /**
96 * @tc.name : truncate_0300
97 * @tc.desc : truncate a file to a negative length
98 * @tc.level : Level 2
99 */
truncate_0300(void)100 void truncate_0300(void)
101 {
102 int result = truncate(path, nlen);
103 if (result == 0) {
104 t_error("%s failed: result = %d\n", __func__, result);
105 return;
106 }
107
108 if (errno != EINVAL) {
109 t_error("%s failed: errno = %d\n", __func__, errno);
110 return;
111 }
112 }
113
114 /**
115 * @tc.name : truncate_0400
116 * @tc.desc : truncate a directory
117 * @tc.level : Level 2
118 */
truncate_0400(void)119 void truncate_0400(void)
120 {
121 int result = truncate("/", 0);
122 if (result == 0) {
123 t_error("%s failed: result = %d\n", __func__, result);
124 return;
125 }
126
127 if (errno != EISDIR) {
128 t_error("%s failed: errno = %d\n", __func__, errno);
129 return;
130 }
131 }
132
main(int argc,char * argv[])133 int main(int argc, char *argv[])
134 {
135 truncate_0100();
136 truncate_0200();
137 truncate_0300();
138 truncate_0400();
139
140 return t_status;
141 }
142