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https://github.com/DragonOS-Community/DragonOS.git
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new:支持dev目录下的readdir
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parent
d7423f36be
commit
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@ -157,9 +157,9 @@ struct vfs_dir_entry_t *vfs_path_walk(const char *path, uint64_t flags)
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{
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char bk = *(tmp_path + tmp_path_len);
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*(tmp_path + tmp_path_len) = '\0';
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kdebug("to search:%s", tmp_path);
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// kdebug("to search:%s", tmp_path);
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dentry = vfs_search_dentry_list(parent, tmp_path);
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kdebug("search done, dentry=%#018lx", dentry);
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// kdebug("search done, dentry=%#018lx", dentry);
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*(tmp_path + tmp_path_len) = bk;
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}
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@ -66,7 +66,38 @@ static long devfs_read(struct vfs_file_t *file_ptr, char *buf, int64_t count, lo
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static long devfs_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *position) {}
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static long devfs_lseek(struct vfs_file_t *file_ptr, long offset, long origin) {}
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static long devfs_ioctl(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr, uint64_t cmd, uint64_t arg) { return 0; }
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static long devfs_readdir(struct vfs_file_t *file_ptr, void *dirent, vfs_filldir_t filler) {return 0;}
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static long devfs_readdir(struct vfs_file_t *file_ptr, void *dirent, vfs_filldir_t filler)
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{
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// 循环读取目录下的目录项
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struct vfs_dir_entry_t *dentry = file_ptr->dEntry;
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struct List *list = &dentry->subdirs_list;
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// 先切换到position处
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for (int i = 0; i <= file_ptr->position; ++i)
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{
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list = list_next(list);
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if (list == &dentry->subdirs_list) // 找完了
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goto failed;
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}
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// 存在目录项
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// 增加偏移量
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++file_ptr->position;
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// 获取目标dentry(由于是子目录项,因此是child_node_list)
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struct vfs_dir_entry_t *target_dent = container_of(list, struct vfs_dir_entry_t, child_node_list);
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kdebug("target name=%s, namelen=%d", target_dent->name, target_dent->name_length);
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char *name = (char *)kzalloc(target_dent->name_length + 1, 0);
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strncpy(name, target_dent->name, target_dent->name_length);
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uint32_t dentry_type;
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if (target_dent->dir_inode->attribute & VFS_ATTR_DIR)
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dentry_type = VFS_ATTR_DIR;
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else
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dentry_type = VFS_ATTR_DEVICE;
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return filler(dirent, file_ptr->position - 1, name, target_dent->name_length, dentry_type, file_ptr->position - 1);
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failed:;
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return 0;
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}
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static struct vfs_file_operations_t devfs_file_ops =
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{
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@ -124,6 +155,7 @@ static __always_inline void __devfs_init_root_inode()
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// todo: 增加private inode info
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devfs_root_dentry->dir_inode->private_inode_info = NULL;
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devfs_root_dentry->dir_inode->sb = &devfs_sb;
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devfs_root_dentry->dir_inode->attribute = VFS_ATTR_DIR;
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}
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/**
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* @brief 初始化devfs的根dentry
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@ -140,6 +172,7 @@ static __always_inline void __devfs_init_root_dentry()
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int devfs_register_device()
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{
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// 暂时只支持键盘文件
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char name[] = "keyboard.dev";
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struct vfs_dir_entry_t *dentry = vfs_alloc_dentry(sizeof(name));
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strcpy(dentry->name, name);
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@ -150,6 +183,7 @@ int devfs_register_device()
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dentry->dir_inode->inode_ops = &devfs_inode_ops;
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dentry->dir_inode->private_inode_info = NULL; // todo:
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dentry->dir_inode->sb = &devfs_sb;
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dentry->dir_inode->attribute = VFS_ATTR_DEVICE;
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dentry->parent = devfs_root_dentry;
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list_init(&dentry->child_node_list);
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list_init(&dentry->subdirs_list);
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@ -209,8 +209,9 @@ int shell_cmd_cd(int argc, char **argv)
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if (current_dir_len > 1)
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new_path[current_dir_len] = '/';
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strcat(new_path, argv[1] + dest_offset);
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if (chdir(new_path) == 0) // 成功切换目录
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int x = chdir(new_path);
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printf("chdir: retval=%d\n",x);
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if (x == 0) // 成功切换目录
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{
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free(shell_current_path);
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// printf("new_path=%s, newlen= %d\n", new_path, new_len);
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@ -260,6 +261,8 @@ int shell_cmd_ls(int argc, char **argv)
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color = COLOR_YELLOW;
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else if (buf->d_type & VFS_ATTR_FILE)
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color = COLOR_INDIGO;
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else if(buf->d_type & VFS_ATTR_DEVICE)
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color= COLOR_GREEN;
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char output_buf[256] = {0};
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