From 8381112442c165b29ef9bcb5f88c3d0c761e2373 Mon Sep 17 00:00:00 2001
From: Frapples <isfrapples@outlook.com>
Date: Wed, 21 Dec 2016 23:12:34 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=BA=E4=BA=86=E6=96=B9=E4=BE=BF=E6=B5=8B?=
 =?UTF-8?q?=E8=AF=95=EF=BC=8C=E5=AE=9E=E7=8E=B0=E5=87=A0=E4=B8=AA=E5=B0=8F?=
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---
 shell_command.c | 49 ++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 44 insertions(+), 5 deletions(-)

diff --git a/shell_command.c b/shell_command.c
index 14a6693..ba918b8 100644
--- a/shell_command.c
+++ b/shell_command.c
@@ -10,22 +10,61 @@ int cmd_pwd(int argc, char* argv[])
 
 int cmd_cd(int argc, char* argv[])
 {
-    printf("%d\n", argc);
+    if (argc <= 0) {
+        printf("命令有误\n");
+        return -1;
+    }
 
-    for (int i = 0; i < argc; i++) {
-        printf("[%s]\n", argv[i]);
+    if (fs_chdir(argv[0]) == FS_SUCCESS) {
+        return 0;
+    } else {
+        printf("改变失败，可能目录不存在\n");
+        return -1;
     }
-    return 0;
+
 }
 
 int cmd_ls(int argc, char* argv[])
 {
+    const char* path;
+    char wd[FS_MAX_FILE_PATH];
+    if (argc <= 0) {
+        fs_getcwd(wd, FS_MAX_FILE_PATH);
+        path = wd;
+    } else {
+        path = argv[0];
+    }
+
+    FS_DIR* dir = fs_opendir(path);
+    if (dir == NULL) {
+        printf("列出目录信息失败\n");
+    }
+
+    char name[32];
+    do {
+        fs_readdir(dir, name);
+        printf("%s ", name);
+    } while(name[0] != '\0');
+    printf("\n");
+
+    fs_closedir(dir);
+
     return 0;
 }
 
 int cmd_mkdir(int argc, char* argv[])
 {
-    return 0;
+    if (argc <= 0) {
+        printf("命令有误\n");
+        return -1;
+    }
+
+    if (fs_mkdir(argv[0]) == FS_SUCCESS) {
+        return 0;
+    } else {
+        printf("建立失败\n");
+        return -1;
+    }
 }
 
 int cmd_rmdir(int argc, char* argv[])