xref: /DragonOS/user/apps/test_ramfs/main.c (revision 1074eb34e784aa2adfc5b9e0d89fa4b7e6ea03ef)
1 // #include <errno.h>
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include <sys/types.h>
5 #include <sys/stat.h>
6 #include <fcntl.h>
7 #include <unistd.h>
8 #include <string.h>
9 #include <sys/mount.h>
10 
11 #define MAX_PATH_LENGTH 100
12 #define MAX_DIR_DEPTH 4
13 
14 
main(int argc,char const * argv[])15 int main(int argc, char const* argv[]) {
16 
17     if (mkdir("/SOME", 0777) == -1) {
18         perror("Failed to create directory under /some");
19         return 1;
20     }
21 
22     // Create a directory under /SOME/RAMFS
23     if (mkdir("/SOME/RAMFS", 0777) == -1) {
24         perror("Failed to create directory under /SOME/RAMFS");
25         return 1;
26     }
27 
28     // Mount the first ramfs at /SOME/RAMFS
29     if (mount("", "/SOME/RAMFS", "ramfs", 0, NULL) == -1) {
30         perror("Failed to mount ramfs at /SOME/RAMFS");
31         return 1;
32     }
33 
34     if (mkdir("/SOME/RAMFS/some", 0777) == -1) {
35         perror("Failed to create directory under /SOME/RAMFS/some");
36         return 1;
37     }
38 
39     puts("Success mkdir /SOME/RAMFS/some");
40 
41     // Create a directory under /SOME/RAMFS/some/another
42     if (mkdir("/SOME/RAMFS/some/another", 0777) == -1) {
43         perror("Failed to create directory under /SOME/RAMFS/some/another");
44         return 1;
45     }
46 
47     puts("Success mkdir /SOME/RAMFS/some/another");
48 
49     if (mount("", "/SOME/RAMFS/some/another", "ramfs", 0, NULL) == -1) {
50         perror("Failed to mount ramfs at /SOME/RAMFS/some/another");
51         return 1;
52     }
53 
54     puts("Success mount on /SOME/RAMFS/some/another");
55 
56     if (mkdir("/SOME/RAMFS/some/another/just_another", 0777) == -1) {
57         perror("Failed to create directory under /SOME/RAMFS/some/another");
58         return 1;
59     }
60 
61     puts("Success mkdir /SOME/RAMFS/some/another/just_another");
62 
63     if (mount("", "/SOME/RAMFS/some/another/just_another", "ramfs", 0, NULL) == -1) {
64         perror("Failed to mount ramfs at /SOME/RAMFS/some/another");
65         return 1;
66     }
67 
68     puts("Success mount on /SOME/RAMFS/some/another/just_another");
69 
70     // Write files under /SOME/RAMFS and /SOME/RAMFS/some/another
71     FILE* file1 = fopen("/SOME/RAMFS/file1.txt", "w");
72     if (file1 == NULL) {
73         perror("Failed to open /SOME/RAMFS/file1.txt");
74         return 1;
75     }
76     fprintf(file1, "This is file1.txt\n");
77     fclose(file1);
78 
79     FILE* file2 = fopen("/SOME/RAMFS/some/another/file2.txt", "w");
80     if (file2 == NULL) {
81         perror("Failed to open /SOME/RAMFS/some/another/file2.txt");
82         return 1;
83     }
84     fprintf(file2, "This is file2.txt\n");
85     fclose(file2);
86 
87     FILE* file3 = fopen("/SOME/RAMFS/some/another/just_another/file3.txt", "w+");
88     if (file3 == NULL) {
89         perror("Failed to open /SOME/RAMFS/some/another/just_another/file3.txt");
90         return 1;
91     }
92     fprintf(file3, "Multi mount behave well.\n");
93     // print file3.txt
94     char buffer[100];
95     fseek(file3, 0, SEEK_SET);
96     fread(buffer, 1, 100, file3);
97     printf("file3.txt content: %s\n", buffer);
98     fclose(file3);
99 
100     // test umount with flags ( use umount2 )
101     if (umount("/SOME/RAMFS/some/another/just_another") == -1) {
102         perror("Failed to umount ramfs at /SOME/RAMFS/some/another/just_another");
103         return 1;
104     }
105 
106     puts("Successful umount /SOME/RAMFS/some/another/just_another");
107 
108     // delete just_another
109     if (rmdir("/SOME/RAMFS/some/another/just_another") == -1) {
110         perror("Failed to delete /SOME/RAMFS/some/another/just_another");
111         return 1;
112     }
113 
114     return 0;
115 }