🆕 pwd命令

user/apps/shell/cmd.c

@@ -0,0 +1,166 @@
+#include "cmd.h"
+#include <libc/string.h>
+#include <libc/stdio.h>
+#include <libc/stddef.h>
+
+// 当前工作目录（在main_loop中初始化）
+char *shell_current_path = NULL;
+/**
+ * @brief shell 内建函数的主命令与处理函数的映射表
+ *
+ */
+struct built_in_cmd_t shell_cmds[] =
+    {
+        {"cd", shell_cmd_cd},
+        {"cat", shell_cmd_cat},
+        {"exec", shell_cmd_exec},
+        {"ls", shell_cmd_ls},
+        {"mkdir", shell_cmd_mkdir},
+        {"pwd", shell_cmd_pwd},
+        {"rm", shell_cmd_rm},
+        {"rmdir", shell_cmd_rmdir},
+        {"reboot", shell_cmd_reboot},
+        {"touch", shell_cmd_touch},
+
+};
+// 总共的内建命令数量
+const static int total_built_in_cmd_num = sizeof(shell_cmds) / sizeof(struct built_in_cmd_t);
+
+/**
+ * @brief 寻找对应的主命令编号
+ *
+ * @param main_cmd 主命令
+ * @return int 成功：主命令编号
+ *              失败： -1
+ */
+int shell_find_cmd(char *main_cmd)
+{
+
+    for (int i = 0; i < total_built_in_cmd_num; ++i)
+    {
+        if (strcmp(main_cmd, shell_cmds[i].name) == 0) // 找到对应的命令号
+            return i;
+    }
+    // 找不到该命令
+    return -1;
+}
+
+/**
+ * @brief 运行shell内建的命令
+ *
+ * @param index 主命令编号
+ * @param argc 参数数量
+ * @param argv 参数列表
+ */
+void shell_run_built_in_command(int index, int argc, char **argv)
+{
+    if (index >= total_built_in_cmd_num)
+        return;
+    // printf("run built-in command : %s\n", shell_cmds[index].name);
+
+    shell_cmds[index].func(argc, argv);
+}
+
+/**
+ * @brief cd命令:进入文件夹
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_cd(int argc, char **argv) {}
+
+/**
+ * @brief 查看文件夹下的文件列表
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_ls(int argc, char **argv) {}
+
+/**
+ * @brief 显示当前工作目录的命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+int shell_cmd_pwd(int argc, char **argv)
+{
+    if (shell_current_path)
+        printf("%s\n", shell_current_path);
+}
+
+/**
+ * @brief 查看文件内容的命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_cat(int argc, char **argv) {}
+
+/**
+ * @brief 创建空文件的命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_touch(int argc, char **argv) {}
+
+/**
+ * @brief 删除命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_rm(int argc, char **argv) {}
+
+/**
+ * @brief 创建文件夹的命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_mkdir(int argc, char **argv) {}
+
+/**
+ * @brief 删除文件夹的命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_rmdir(int argc, char **argv) {}
+
+/**
+ * @brief 执行新的程序的命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+
+// todo:
+int shell_cmd_exec(int argc, char **argv) {}
+
+/**
+ * @brief 重启命令
+ *
+ * @param argc
+ * @param argv
+ * @return int
+ */
+// todo:
+int shell_cmd_reboot(int argc, char **argv) {}