1
static void tool_ls(const char *path)
2
{
3
    int dir = fs_opendir(path ? path : "/");
4
    if (dir < 0) {
5
        vga_printf("ls: cannot open '%s'\n", path);
6
        return;
7
    }
8

9
    dirent_t *de;
10
    while ((de = fs_readdir(dir)) != NULL) {
11
        vga_printf("%-4s %s\n",
12
                   de->type == FILE_TYPE_DIRECTORY ? "dir" : "file",
13
                   de->name);
14
    }
15
    fs_closedir(dir);
16
}

1
static void tool_cat(const char *path)
2
{
3
    int fd = fs_open(path, FS_OPEN_READ);
4
    if (fd < 0) {
5
        vga_printf("cat: %s: not found\n", path);
6
        return;
7
    }
8

9
    char buf[128];
10
    ssize_t n;
11
    while ((n = fs_read(fd, buf, sizeof(buf) - 1)) > 0) {
12
        buf[n] = '\0';
13
        vga_printf("%s", buf);
14
    }
15
    fs_close(fd);
16
}

1
static void tool_cp(const char *src, const char *dst)
2
{
3
    int sfd = fs_open(src, FS_OPEN_READ);
4
    if (sfd < 0) {
5
        vga_printf("cp: %s: not found\n", src);
6
        return;
7
    }
8
    int dfd = fs_open(dst, FS_OPEN_WRITE | FS_OPEN_CREATE);
9
    if (dfd < 0) {
10
        fs_close(sfd);
11
        vga_printf("cp: cannot create %s\n", dst);
12
        return;
13
    }
14
    char buf[256];
15
    ssize_t n;
16
    while ((n = fs_read(sfd, buf, sizeof(buf))) > 0) {
17
        fs_write(dfd, buf, n);
18
    }
19
    fs_close(sfd);
20
    fs_close(dfd);
21
    vga_printf("cp: %s -> %s\n", src, dst);
22
}

1
static void tool_echo_to_file(const char *text, const char *path)
2
{
3
    int fd = fs_open(path, FS_OPEN_WRITE | FS_OPEN_CREATE);
4
    if (fd < 0) {
5
        vga_printf("echo: cannot open %s\n", path);
6
        return;
7
    }
8
    fs_write(fd, text, strlen(text));
9
    fs_write(fd, "\n", 1);
10
    fs_close(fd);
11
}

1
static void demo_task(void *arg)
2
{
3
    vga_printf("\n--- Userspace Tools Demo ---\n\n");
4

5
    /* 创建目录结构 */
6
    vga_printf("== mkdir ==\n");
7
    fs_mkdir("/home", FS_PERM_READ | FS_PERM_WRITE);
8
    fs_mkdir("/home/user", FS_PERM_READ | FS_PERM_WRITE);
9
    fs_mkdir("/tmp", FS_PERM_READ | FS_PERM_WRITE);
10
    vga_printf("Created /home, /home/user, /tmp\n\n");
11

12
    /* echo > file */
13
    vga_printf("== echo > file ==\n");
14
    tool_echo_to_file("Hello from MyOS", "/home/user/hello.txt");
15
    tool_echo_to_file("System configuration", "/home/user/config.txt");
16
    tool_echo_to_file("Temporary data", "/tmp/temp.txt");
17
    vga_printf("Created 3 files\n\n");
18

19
    /* ls */
20
    vga_printf("== ls / ==\n");
21
    tool_ls("/");
22
    vga_printf("\n== ls /home/user ==\n");
23
    tool_ls("/home/user");
24

25
    /* cat */
26
    vga_printf("\n== cat /home/user/hello.txt ==\n");
27
    tool_cat("/home/user/hello.txt");
28

29
    /* cp */
30
    vga_printf("\n== cp ==\n");
31
    tool_cp("/home/user/hello.txt", "/tmp/hello_copy.txt");
32

33
    /* verify copy */
34
    vga_printf("\n== cat /tmp/hello_copy.txt ==\n");
35
    tool_cat("/tmp/hello_copy.txt");
36

37
    /* ls to verify */
38
    vga_printf("\n== ls /tmp ==\n");
39
    tool_ls("/tmp");
40

41
    vga_printf("\n=== All Userspace Tools Demo Complete ===\n");
42
    while (1) schedule_yield();
43
}