feat: implement readlink(2) readlinkat(2)

[lunaix-os.git] / lunaix-os / kernel / demos / iotest.c

diff --git a/lunaix-os/kernel/demos/iotest.c b/lunaix-os/kernel/demos/iotest.c
index 3fc89148e38fd8f996fe29d2027e440aee3034ad..2ddeb1a2f29c0593b54208d7d62785edcf2786ce 100644 (file)
--- a/lunaix-os/kernel/demos/iotest.c
+++ b/lunaix-os/kernel/demos/iotest.c
@@ -11,19 +11,28 @@ _iotest_main()
     char test_sequence[] = "Once upon a time, in a magical land of Equestria. "
                            "There were two regal sisters who ruled together "
                            "and created harmony for all the land.";
-    int fd = open("/dev/block/bd0", 0);
 
-    if (fd < 0) {
+    int fd = open("/dev/sda", 0);  // bd0 设备 - 硬盘
+    int tty = open("/dev/tty", 0); // tty 设备 - 控制台
+
+    if (fd < 0 || tty < 0) {
         kprintf(KERROR "fail to open (%d)\n", geterrno());
         return;
     }
 
+    // 移动指针至第二个逻辑扇区（LBA=1），并写入
     lseek(fd, 1, FSEEK_SET);
     write(fd, test_sequence, sizeof(test_sequence));
 
-    lseek(fd, -1, FSEEK_CUR);
+    // 读出我们写的内容
     char read_out[256];
+    lseek(fd, -1, FSEEK_CUR);
     read(fd, read_out, sizeof(read_out));
 
-    kprintf("%s", read_out);
+    write(tty, read_out, sizeof(read_out));
+
+    close(fd);
+    close(tty);
+
+    kprint_hex(read_out, sizeof(read_out));
 }
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