增加touch到绝对路径的功能

kernel/filesystem/VFS/VFS.c

@@ -90,7 +90,7 @@ struct vfs_dir_entry_t *vfs_path_walk(const char *path, uint64_t flags)
         return parent;
 
     struct vfs_dir_entry_t *dentry;
-    kdebug("path before walk:%s", path);
+    // kdebug("path before walk:%s", path);
     while (true)
     {
         // 提取出下一级待搜索的目录名或文件名，并保存在dEntry_name中
@@ -107,13 +107,13 @@ struct vfs_dir_entry_t *vfs_path_walk(const char *path, uint64_t flags)
 
         memcpy(dentry->name, (void *)tmp_path, tmp_path_len);
         dentry->name[tmp_path_len] = '\0';
-        kdebug("tmp_path_len=%d, dentry->name= %s", tmp_path_len, dentry->name);
+        // kdebug("tmp_path_len=%d, dentry->name= %s", tmp_path_len, dentry->name);
         dentry->name_length = tmp_path_len;
 
         if (parent->dir_inode->inode_ops->lookup(parent->dir_inode, dentry) == NULL)
         {
             // 搜索失败
-            kerror("cannot find the file/dir : %s", dentry->name);
+            // kerror("cannot find the file/dir : %s", dentry->name);
             kfree(dentry->name);
             kfree(dentry);
             return NULL;
@@ -179,7 +179,7 @@ int vfs_fill_dentry(void *buf, ino_t d_ino, char *name, int namelen, unsigned ch
 uint64_t sys_mkdir(struct pt_regs *regs)
 {
     const char *path = (const char *)regs->r8;
-    kdebug("path = %s", path);
+    // kdebug("path = %s", path);
     mode_t mode = (mode_t)regs->r9;
     uint32_t pathlen;
     if (regs->cs & USER_CS)
@@ -215,7 +215,7 @@ uint64_t sys_mkdir(struct pt_regs *regs)
     else
         strncpy(buf, path, last_slash);
     buf[last_slash + 1] = '\0';
-    kdebug("to walk: %s", buf);
+    // kdebug("to walk: %s", buf);
     // 查找父目录
     struct vfs_dir_entry_t *parent_dir = vfs_path_walk(buf, 0);
 
@@ -232,7 +232,7 @@ uint64_t sys_mkdir(struct pt_regs *regs)
     {
         // 目录中已有对应的文件夹
         kwarn("Dir '%s' aleardy exists.", path);
-        kdebug("name = %s", vfs_path_walk((const char *)path, 0)->name) return -EEXIST;
+        return -EEXIST;
     }
 
     struct vfs_dir_entry_t *subdir_dentry = (struct vfs_dir_entry_t *)kmalloc(sizeof(struct vfs_dir_entry_t), 0);
@@ -251,12 +251,12 @@ uint64_t sys_mkdir(struct pt_regs *regs)
     }
     ++subdir_dentry->name_length;
 
-    kdebug("last_slash=%d", last_slash);
+    // kdebug("last_slash=%d", last_slash);
-    kdebug("name=%s", path + last_slash + 1);
+    // kdebug("name=%s", path + last_slash + 1);
     subdir_dentry->parent = parent_dir;
-    kdebug("to mkdir, parent name=%s", parent_dir->name);
+    // kdebug("to mkdir, parent name=%s", parent_dir->name);
     int retval = parent_dir->dir_inode->inode_ops->mkdir(parent_dir->dir_inode, subdir_dentry, 0);
     list_add(&parent_dir->subdirs_list, &subdir_dentry->child_node_list);
-    kdebug("retval = %d", retval);
+    // kdebug("retval = %d", retval);
     return 0;
 }

kernel/filesystem/fat32/fat32.c

@@ -139,7 +139,7 @@ struct vfs_dir_entry_t *fat32_lookup(struct vfs_index_node_t *parent_inode, stru
 
                 if (js >= dest_dentry->name_length) // 找到需要的目录项，返回
                 {
-                    kdebug("found target long name.");
+                    // kdebug("found target long name.");
 
                     goto find_lookup_success;
                 }
@@ -151,7 +151,7 @@ struct vfs_dir_entry_t *fat32_lookup(struct vfs_index_node_t *parent_inode, stru
             js = 0;
             for (int x = 0; x < 8; ++x)
             {
-                kdebug("no long name, comparing short name");
+                // kdebug("no long name, comparing short name");
                 // kdebug("value = %#02x", tmp_dEntry->DIR_Name[x]);
                 switch (tmp_dEntry->DIR_Name[x])
                 {
@@ -627,38 +627,7 @@ long fat32_read(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *pos
     return retval;
 }
 
-/**
- * @brief 在磁盘中寻找一个空闲的簇
- *
- * @param fsbi fat32超级块信息结构体
- * @return uint64_t 空闲簇号（找不到则返回0）
- */
-// uint64_t fat32_find_available_cluster(fat32_sb_info_t *fsbi)
-// {
-//     uint64_t sec_per_fat = fsbi->sec_per_FAT;
 
-//     // 申请1扇区的缓冲区
-//     uint32_t *buf = (uint32_t *)kmalloc(fsbi->bytes_per_sec, 0);
-//     int ent_per_sec = (fsbi->bytes_per_sec >> 2);
-//     for (int i = 0; i < sec_per_fat; ++i)
-//     {
-//         memset(buf, 0, fsbi->bytes_per_sec);
-
-//         ahci_operation.transfer(AHCI_CMD_READ_DMA_EXT, fsbi->FAT1_base_sector + i, 1, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
-//         // 依次检查簇是否空闲
-//         for (int j = 0; j < ent_per_sec; ++j)
-//         {
-//             // 找到空闲簇
-//             if ((buf[j] & 0x0fffffff) == 0)
-//             {
-//                 kfree(buf);
-//                 return i * ent_per_sec + j;
-//             }
-//         }
-//     }
-//     kfree(buf);
-//     return 0;
-// }
 
 /**
  * @brief 向fat32文件系统写入数据
@@ -677,8 +646,6 @@ long fat32_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *po
     uint32_t cluster = finode->first_clus;
     int64_t flags = 0;
 
-    // kdebug("fsbi->bytes_per_clus=%d fsbi->sec_per_clus=%d finode->first_clus=%d *position=%d", fsbi->bytes_per_clus, fsbi->sec_per_clus, finode->first_clus, *position);
-    // kdebug("buf=%s", buf);
     // clus offset in file
     uint64_t clus_offset_in_file = (*position) / fsbi->bytes_per_clus;
     // bytes offset in clus
@@ -686,10 +653,6 @@ long fat32_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *po
 
     if (!cluster) // 起始簇号为0，说明是空文件
     {
-        // // 找一个可用的簇
-        // cluster = fat32_find_available_cluster(fsbi);
-        // flags = 1;
-
         // 分配空闲簇
         if (fat32_alloc_clusters(file_ptr->dEntry->dir_inode, &cluster, 1) != 0)
             return -ENOSPC;
@@ -705,14 +668,7 @@ long fat32_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *po
     if (!cluster)
         return -ENOSPC;
 
-    // if (flags) // 空文件
+   
-    // {
-    //     // kdebug("empty file");
-    //     finode->first_clus = cluster;
-    //     // 写入目录项
-    //     file_ptr->dEntry->dir_inode->sb->sb_ops->write_inode(file_ptr->dEntry->dir_inode);
-    //     fat32_write_FAT_entry(fsbi, cluster, 0x0ffffff8); // 写入fat表项
-    // }
 
     int64_t bytes_remain = count;
 
@@ -793,7 +749,7 @@ long fat32_write(struct vfs_file_t *file_ptr, char *buf, int64_t count, long *po
     {
         file_ptr->dEntry->dir_inode->file_size = *position;
         file_ptr->dEntry->dir_inode->sb->sb_ops->write_inode(file_ptr->dEntry->dir_inode);
-        kdebug("new file size=%ld", *position);
+        // kdebug("new file size=%ld", *position);
     }
 
     kfree(tmp_buffer);
@@ -875,10 +831,9 @@ long fat32_create(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_t
 
     int64_t retval = 0;
 
-    kdebug("dest_dEntry->name=%s",dest_dEntry->name);
     // ======== 检验名称的合法性
     retval = fat32_check_name_available(dest_dEntry->name, dest_dEntry->name_length, 0);
-    kdebug("dest_dEntry->name=%s",dest_dEntry->name); 
+
     if (retval != 0)
         return retval;
 
@@ -913,7 +868,7 @@ long fat32_create(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_t
     uint64_t tmp_parent_dentry_clus = 0;
     // 寻找空闲目录项
     struct fat32_Directory_t *empty_fat32_dentry = fat32_find_empty_dentry(parent_inode, cnt_longname + 1, 0, &tmp_dentry_sector, &tmp_parent_dentry_clus, &tmp_dentry_clus_buf_addr);
-    kdebug("found empty dentry, cnt_longname=%ld", cnt_longname);
+    // kdebug("found empty dentry, cnt_longname=%ld", cnt_longname);
 
     finode->first_clus = 0;
     finode->dEntry_location_clus = tmp_parent_dentry_clus;
@@ -927,21 +882,21 @@ long fat32_create(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_t
         goto fail;
     }
 
-    kdebug("new dir clus=%ld", new_dir_clus);
+    // kdebug("new dir clus=%ld", new_dir_clus);
-    kdebug("dest_dEntry->name=%s",dest_dEntry->name);
+    // kdebug("dest_dEntry->name=%s",dest_dEntry->name);
     // ====== 填写短目录项
     fat32_fill_shortname(dest_dEntry, empty_fat32_dentry, new_dir_clus);
-    kdebug("dest_dEntry->name=%s",dest_dEntry->name);
+    // kdebug("dest_dEntry->name=%s",dest_dEntry->name);
 
     // 计算校验和
     uint8_t short_dentry_ChkSum = fat32_ChkSum(empty_fat32_dentry->DIR_Name);
 
-    kdebug("dest_dEntry->name=%s",dest_dEntry->name);
+    // kdebug("dest_dEntry->name=%s",dest_dEntry->name);
     // ======== 填写长目录项
     fat32_fill_longname(dest_dEntry, (struct fat32_LongDirectory_t *)(empty_fat32_dentry - 1), short_dentry_ChkSum, cnt_longname);
 
     // ====== 将目录项写回磁盘
-    kdebug("tmp_dentry_sector=%ld", tmp_dentry_sector);
+    // kdebug("tmp_dentry_sector=%ld", tmp_dentry_sector);
     ahci_operation.transfer(AHCI_CMD_WRITE_DMA_EXT, tmp_dentry_sector, fsbi->sec_per_clus, tmp_dentry_clus_buf_addr, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
 
     // 注意：parent字段需要在调用函数的地方进行设置
@@ -992,7 +947,7 @@ int64_t fat32_mkdir(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_
     uint64_t tmp_parent_dentry_clus = 0;
     // 寻找空闲目录项
     struct fat32_Directory_t *empty_fat32_dentry = fat32_find_empty_dentry(parent_inode, cnt_longname + 1, 0, &tmp_dentry_sector, &tmp_parent_dentry_clus, &tmp_dentry_clus_buf_addr);
-    kdebug("found empty dentry, cnt_longname=%ld", cnt_longname);
+
 
     // ====== 初始化inode =======
     struct vfs_index_node_t *inode = (struct vfs_index_node_t *)kmalloc(sizeof(struct vfs_index_node_t), 0);
@@ -1012,7 +967,7 @@ int64_t fat32_mkdir(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_
     p->first_clus = 0;
     p->dEntry_location_clus = tmp_parent_dentry_clus;
     p->dEntry_location_clus_offset = empty_fat32_dentry - (struct fat32_Directory_t *)tmp_dentry_clus_buf_addr;
-    kdebug(" p->dEntry_location_clus_offset=%d", p->dEntry_location_clus_offset);
+    // kdebug(" p->dEntry_location_clus_offset=%d", p->dEntry_location_clus_offset);
     // todo: 填写完全fat32_inode_info的信息
 
     // 初始化dentry信息
@@ -1029,7 +984,7 @@ int64_t fat32_mkdir(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_
         goto fail;
     }
 
-    kdebug("new dir clus=%ld", new_dir_clus);
+    // kdebug("new dir clus=%ld", new_dir_clus);
 
     // ====== 填写短目录项
     fat32_fill_shortname(dEntry, empty_fat32_dentry, new_dir_clus);
@@ -1041,11 +996,11 @@ int64_t fat32_mkdir(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_
     fat32_fill_longname(dEntry, (struct fat32_LongDirectory_t *)(empty_fat32_dentry - 1), short_dentry_ChkSum, cnt_longname);
 
     // ====== 将目录项写回磁盘
-    kdebug("tmp_dentry_sector=%ld", tmp_dentry_sector);
+    // kdebug("tmp_dentry_sector=%ld", tmp_dentry_sector);
     ahci_operation.transfer(AHCI_CMD_WRITE_DMA_EXT, tmp_dentry_sector, fsbi->sec_per_clus, tmp_dentry_clus_buf_addr, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
     // ====== 初始化新的文件夹的目录项 =====
     {
-        kdebug("to create dot and dot dot.");
+        // kdebug("to create dot and dot dot.");
         void *buf = kmalloc(fsbi->bytes_per_clus, 0);
         struct fat32_Directory_t *new_dir_dentries = (struct fat32_Directory_t *)buf;
         memset((void *)new_dir_dentries, 0, fsbi->bytes_per_clus);
@@ -1074,7 +1029,7 @@ int64_t fat32_mkdir(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_
         // 写入磁盘
 
         uint64_t sector = fsbi->first_data_sector + (new_dir_clus - 2) * fsbi->sec_per_clus;
-        kdebug("add dot and dot dot: sector=%ld", sector);
+        // kdebug("add dot and dot dot: sector=%ld", sector);
         ahci_operation.transfer(AHCI_CMD_WRITE_DMA_EXT, sector, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
     }
 

kernel/filesystem/fat32/fat_ent.c

@@ -42,7 +42,7 @@ int fat32_alloc_clusters(struct vfs_index_node_t *inode, uint32_t *clusters, int
             // 找到空闲簇
             if ((buf[j] & 0x0fffffff) == 0)
             {
-                kdebug("clus[%d] = %d", clus_idx, i * ent_per_sec + j);
+                // kdebug("clus[%d] = %d", clus_idx, i * ent_per_sec + j);
                 clusters[clus_idx] = i * ent_per_sec + j;
                 ++clus_idx;
             }
@@ -84,7 +84,7 @@ done:;
         // 写入fat表
         for (int i = idx; i < num_clusters; ++i)
         {
-            kdebug("write cluster i=%d : cluster=%d, value= %d", i, cluster, clusters[i]);
+            // kdebug("write cluster i=%d : cluster=%d, value= %d", i, cluster, clusters[i]);
             fat32_write_FAT_entry(fsbi, cluster, clusters[i]);
             cluster = clusters[i];
         }
@@ -182,7 +182,7 @@ uint32_t fat32_write_FAT_entry(fat32_sb_info_t *fsbi, uint32_t cluster, uint32_t
  */
 struct fat32_Directory_t *fat32_find_empty_dentry(struct vfs_index_node_t *parent_inode, uint32_t num, uint32_t mode, uint32_t *res_sector, uint64_t *res_cluster, uint64_t *res_data_buf_base)
 {
-    kdebug("find empty_dentry");
+    // kdebug("find empty_dentry");
     struct fat32_inode_info_t *finode = (struct fat32_inode_info_t *)parent_inode->private_inode_info;
     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)parent_inode->sb->private_sb_info;
 

kernel/syscall/syscall.c

@@ -144,7 +144,7 @@ uint64_t sys_open(struct pt_regs *regs)
     //     printk_color(ORANGE, BLACK, "Found %s\nDIR_FstClus:%#018lx\tDIR_FileSize:%#018lx\n", path, ((struct fat32_inode_info_t *)(dentry->dir_inode->private_inode_info))->first_clus, dentry->dir_inode->file_size);
     // else
     //     printk_color(ORANGE, BLACK, "Can`t find file\n");
-    kdebug("flags=%#018lx", flags);
+    // kdebug("flags=%#018lx", flags);
     if (dentry == NULL && flags & O_CREAT)
     {
         // 先找到倒数第二级目录
@@ -159,7 +159,7 @@ uint64_t sys_open(struct pt_regs *regs)
         }
 
         struct vfs_dir_entry_t *parent_dentry = NULL;
-        kdebug("tmp_index=%d", tmp_index);
+        // kdebug("tmp_index=%d", tmp_index);
         if (tmp_index > 0)
         {
             
@@ -183,7 +183,7 @@ uint64_t sys_open(struct pt_regs *regs)
         dentry->name = (char *)kmalloc(dentry->name_length, 0);
         memset(dentry->name, 0, dentry->name_length);
         strncpy(dentry->name, path + tmp_index + 1, dentry->name_length);
-        kdebug("to create new file:%s   namelen=%d", dentry->name, dentry->name_length)
+        // kdebug("to create new file:%s   namelen=%d", dentry->name, dentry->name_length)
         dentry->parent = parent_dentry;
         uint64_t retval = parent_dentry->dir_inode->inode_ops->create(parent_dentry->dir_inode, dentry, 0);
         if (retval != 0)
@@ -197,7 +197,7 @@ uint64_t sys_open(struct pt_regs *regs)
         list_init(&dentry->child_node_list);
         list_init(&dentry->subdirs_list);
         list_add(&parent_dentry->subdirs_list, &dentry->child_node_list);
-        kdebug("created.");
+        // kdebug("created.");
     }
     kfree(path);
     if (dentry == NULL)
@@ -466,12 +466,7 @@ uint64_t sys_brk(struct pt_regs *regs)
     else
         offset = -(int64_t)(current_pcb->mm->brk_end - new_brk);
 
-    /*
+    
-    if (offset < 0)
-    {
-        kdebug("decrease brk, offset = %#010lx", (uint64_t)(-offset));
-    }
-    */
 
     new_brk = mm_do_brk(current_pcb->mm->brk_end, offset); // 扩展堆内存空间
 
@@ -545,7 +540,7 @@ uint64_t sys_reboot(struct pt_regs *regs)
 uint64_t sys_chdir(struct pt_regs *regs)
 {
     char *dest_path = (char *)regs->r8;
-    kdebug("dest_path=%s", dest_path);
+    // kdebug("dest_path=%s", dest_path);
     // 检查目标路径是否为NULL
     if (dest_path == NULL)
         return -EFAULT;
@@ -579,14 +574,14 @@ uint64_t sys_chdir(struct pt_regs *regs)
     }
     else
         strncpy(path, dest_path, dest_path_len + 1);
-    kdebug("chdir: path = %s", path);
+    // kdebug("chdir: path = %s", path);
     struct vfs_dir_entry_t *dentry = vfs_path_walk(path, 0);
 
     kfree(path);
 
     if (dentry == NULL)
         return -ENOENT;
-    kdebug("dentry->name=%s, namelen=%d", dentry->name, dentry->name_length);
+    // kdebug("dentry->name=%s, namelen=%d", dentry->name, dentry->name_length);
     // 目标不是目录
     if (dentry->dir_inode->attribute != VFS_ATTR_DIR)
         return -ENOTDIR;

user/apps/shell/cmd.c

@@ -330,14 +330,26 @@ int shell_cmd_cat(int argc, char **argv)
  * @param argv
  * @return int
  */
-// todo:
 int shell_cmd_touch(int argc, char **argv)
 {
     int path_len = 0;
-    char *file_path = get_target_filepath(argv[1], &path_len);
+    char *file_path;
+    if (argv[1][0] == '/')
+        file_path = argv[1];
+    else
+        file_path = get_target_filepath(argv[1], &path_len);
 
     // 打开文件
     int fd = open(file_path, O_CREAT);
+    switch (fd)
+    {
+    case -ENOENT:
+        put_string("Parent dir not exists.\n", COLOR_RED, COLOR_BLACK);
+        break;
+
+    default:
+        break;
+    }
     close(fd);
     if (argv != NULL)
         free(argv);