JPH04369055A - Deletion file restoring system - Google Patents

Abstract

PURPOSE:To specify a restoring place within a short time by providing this system with a file information file for storing the complete bus name specifying file name of a file to be deleted and its node information, and at the time of executing restoring request processing, using the stored information. CONSTITUTION:In an operating system including data information indicating the final updating date of an individual file in node information corresponding to the individual file managed by tree structure, a file deleting request processing 3 starts a current data acquiring means 4 when data inputted from a terminal equipment 1 are analyzed by a command analyzing means 2 and judged as deleting processing. A deleting file information output means 7 additionally outputs the complete bus name specifying file name of a file to be deleted which is acquired by a deleting file information acquiring means 6 and information mode information to the file information file 9. At the time of executing restoring request processing, a file updating means 13 judges whether automatic restoration is possible or not, and when automatic restoration is possible, a file to be automatically restored is searched and restored.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a deleted file recovery method, and more particularly to a deleted file recovery method in a file system that is managed in a tree structure and has date and time information when the file was last updated in the node information for each file. .

0002

[Prior Art] Conventionally, file deletion and recovery processing in a file system that is managed using this kind of tree structure and has date and time information when the file was last updated in the node information for each file has been When recovering, a dedicated file system debugger was started and everything was done manually.

0003

[Problems to be Solved by the Invention] In the conventional deleted file recovery method described above, when recovering a file after deletion, a dedicated file system debugger was started and everything was done manually, so the file system required modification. The disadvantage is that it takes time to identify the location of the file, and there is a high risk of destroying other files if the file system structure is not properly understood.

0004

[Means for Solving the Problems] The deleted file recovery method of the present invention has a file system managed in a tree structure, and node information for each file existing in the file system includes information indicating that the file was the last one. In file deletion or recovery processing in an operating system that has date and time information updated in , a file name that specifies the full path name of the file to be deleted or deleted (hereinafter referred to as "full path name specified file name"), Prepare a file information file with node information for the file, and in the case of a deletion processing request, a current date and time acquisition means for acquiring the current date and time, and the date and time acquired by the current date and time acquisition means. a current date and time output means for outputting the information to a file information file; a deletion file information acquisition means for acquiring the complete path name specification file name of the file to be deleted and the node information of the file; and acquisition by the deletion file information acquisition means. A deletion file information output means that additionally outputs the complete path name specification file of the file to be deleted and the node information of the file to the file information file, and in the case of a recovery processing request, the date and time of the deletion processing request. a deletion date and time acquisition means for reading the time and time from the file information file; a last update date and time acquisition means for acquiring the last updated date and time for each of all files existing in the file system; and the deletion date and time. The date and time of deletion obtained by the acquisition method,
Compare the date and time of the last update obtained by the last update date and time acquisition means, and if the date and time of the last update are older than the date and time at the time of deletion, something will happen to other files after deletion. A file update determination means that determines that an update (editing, creation, etc.) process has been performed, and otherwise determines that the update process has not been performed, and when the file update determination means determines that an update has not been performed. , a file information input means for acquiring the complete path name specified file name of the file to be restored and the node information of the file; It sequentially traces the file system to the directory where the file existed, searches for the file element name excluding the path name of the complete path name specified file name from the data part of the directory, and retrieves the node information for the file. , a file recovery means that replaces the node information with the node information read by the file information input means, and when the file update determination means determines that an update has been performed, the data of the deleted file is changed when another file is updated. An unrecoverable message output means outputs a message to the effect that it is unrecoverable, a current date and time output means, and a deleted file information output means, and a deletion date and time acquisition means and file information are written. The information processing apparatus is configured to include an input means and a file information file deletion means for deleting the file information file referenced by the input means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

The deleted file recovery method of this embodiment includes a terminal device 1, a command analysis means 2, a file deletion request input port 3, a current date and time acquisition means 4, a current date and time output means 5, and a deleted file. Information acquisition means 6, deletion file information output means 7, file deletion processing 8, file information file 9, file recovery request input port 10, deletion date and time acquisition means 11, last update date and time acquisition means 12,
File update determination means 13 and file information input means 1
4, file recovery means 15, unrecoverable message output means 16, and file information file deletion means 17.

FIG. 2 shows the information registered by the current date and time output means 5 and the deletion file information output means 7, and the deletion date and time acquisition means 1.
1 and file information input means 14 are shown in detail.

[0009] The file information file 9 contains the date and time when the deletion request was processed in the first record, and the complete path name of the deleted file and the node information of the file in the second and subsequent records. It consists of

Next, the overall operation of this embodiment will be specifically explained. The file deletion request 3 is made when the data input from the terminal device 1 is analyzed by the command analysis means 2 and it is determined that the data is to be deleted. is activated as information, and the current date and time acquisition means 4 is activated in order to acquire the current date and time. The current date and time acquisition means 4 acquires the current date and time, and activates the current date and time output means 5 in order to output the acquired current date and time to the file information file 9.

The current date and time output means 5 outputs the current date and time acquired by the current date and time acquisition means 4 to the file information file 9. Next, the deletion file information acquisition means 6 is activated in order to acquire the complete path name of the file to be deleted, the specified file name, and the node information of the file. The deletion file information acquisition means 6 is the terminal device 1
Recognizes the information given to the command as the file element name of the file to be deleted, obtains the full path name specification file name of those files and the node information of that file, and creates the obtained complete path name specification file. In order to additionally output the file name and node information of the file to the file information file 9, the deleted file information output means 7 is activated.

The deletion file information output means 7 additionally outputs the complete path name specified file name of the file to be deleted obtained by the deletion file information acquisition means 6 and the node information of the file to the file information file 9, and In order to delete the file, file deletion processing 8 is started.

File deletion processing 8 actually deletes the file to be deleted. The file recovery request 10 is activated when the data input from the terminal device 1 is analyzed by the command analysis means 2, and as a result it is determined that it is a recovery process, and obtains the date and time when the deletion process was performed. In order to do so, the deletion date and time acquisition means 11 is activated.

[0014] The deletion date and time acquisition means 11 outputs to the file information file 9 by the current date and time output means 5 of file deletion request processing, and stores the complete path name designation file name of the deleted file and the node information of the file in the file information. Obtained from file 9. Next, in order to obtain the date and time of the last update to the existing file, the last update date and time obtaining means 12 is activated.

[0015] After the deletion process, the last update date and time acquisition means 12 determines the date and time of the last update for existing files in order to determine whether any update process has been performed on other files. time and starts the file update determination means 13. The file update determination means 13 is
Compare the date and time acquired or deleted by the deletion date and time acquisition means 11 with the date and time when each file was last updated, acquired by the last update date and time acquisition means 12,
If the date and time when the last update process was performed for all files is older than the date and time when the deletion process was performed, it is determined that no update process was performed after the deletion process, and the file information input means 14 is activated. Additionally, if there is even one file in which the date and time of the deletion process are older than the date and time of the last update process, it is determined that the update process has been performed, and a message indicating that recovery is impossible is determined. In order to output the message, the unrecoverable message output means 16 is activated.

The file information input means 14 is activated when the file update determination means 13 determines that no update processing has been performed on any file, and the file information output means 7 outputs the file information when processing a deletion request. The complete path name specified file name of the deleted file output to the information file 9 and the node information of the file are acquired, and the file recovery means 15 is activated.

The file recovery means 15 uses the complete path name of the deleted file obtained by the file information input means 14 to restore the file system to the directory where the file existed. The file element name, excluding the path name part of the complete path name specified file name, is found from the data section of the existing directory, and the node information for that file is obtained by the file information input means 14. Replace with the updated node information and recover the file. Next, in order to delete the file information file 9, the file information file deletion means 17 is activated.

Further, when the file update determination means 13 determines that an update process has been performed after a deletion process, an unrecoverable message output means 16 is activated. The unrecoverable message output means 16 assumes that the data of the file deleted during the deletion process may have been changed when another file was updated, and outputs a message indicating that the data is unrecoverable. Next, in order to delete the file information file 9, the file information file deletion means 17 is activated. The file information file deletion means 17 is the file recovery means 15 or the unrecoverable message output means 16.
2, deletes the file information file 9, and returns to the command analysis means.

[0019]

[Effects of the Invention] As explained above, the present invention has a file system managed in a tree structure, and the node information for each file existing in the file system includes information indicating that the file was last updated. In file deletion and recovery processing in an operating system that has date and time information, when processing a deletion request, the file name specified by the full path name of the file to be deleted and the node information of that file are stored in the file information file. , when processing a recovery request, by using that information to recover the deleted file, a dedicated file system debugger is started, and it is determined whether recovery is possible automatically rather than the method that was done entirely manually. However, if it can be recovered, it automatically searches for the file to be recovered and restores it, so it does not take time to identify the recovery location, and there is no risk of destroying other files even if you do not know the file system structure. It has the effect of reducing sexuality.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

[Figure 2] Explanatory diagram showing the structure of the file information file used in this example

[Explanation of symbols]

1 Terminal device 2 Command analysis means 3 File deletion request processing input port 4 Current date and time acquisition means 5 Current date and time output means 6 Deletion file information acquisition means 7 Deletion file information output means 8 File deletion processing 9 File information file 10 File recovery Request processing input port 11
Deletion date and time acquisition means 12 Last update date and time acquisition means 13 File update determination means 14 File information input means 15 File recovery means

Claims (1)

[Claims] [Claim 1] An operating system that has a file system managed in a tree structure, and in which node information for each file existing in the file system includes date and time information when that file was last updated. In file deletion or recovery processing, a file information file is prepared that has a file name that specifies the full path name of the file to be deleted or deleted (hereinafter referred to as the "full path name specified file name") and node information for that file. However, in the case of a deletion processing request, a current date and time acquisition means that acquires the current date and time, and a current date and time output means that outputs the date and time acquired by the current date and time acquisition means to a file information file. a deletion file information acquisition means for acquiring the complete path name specification file name of the file to be deleted and the node information of the file; a complete path name specification file of the file to be deleted obtained by the deletion file information acquisition means; Deletion file information output means for additionally outputting file node information to the file information file, and in the case of a recovery processing request, deletion date and time acquisition means for reading the date and time of the deletion processing request from the file information file. , a last update date and time acquisition means for acquiring the last update date and time of each of all files existing in the file system; and a date and time at the time of deletion acquired by the deletion date and time acquisition means; The date and time of the last update obtained by the last update date and time acquisition means are compared, and the date and time of the last update are determined.
File update determination that determines that some update processing (editing, creation, etc.) was performed on other files after deletion if the date and time are older than the time of deletion; otherwise, it is determined that no update processing was performed. means, file information input means for acquiring a complete path name specification file name of a file to be restored and node information of the file when the file update determination means determines that no update has been performed; Based on the path name of the complete path name specified file read by the input method, the file system is traced in order to the directory where the file existed, and the complete path name specified file is created from the data section of the directory where the file existed. a file recovery means that searches for the file element name excluding the path name, and replaces the node information for the file with the node information read by the file information input means; and the file update determination means determines that an update has been performed. an unrecoverable message output means that assumes that the data in the deleted file may have been changed when another file was updated and outputs a message to the effect that it is unrecoverable, and the current date and time. A deletion file characterized by comprising a file information file deletion means for deleting a file information file written by an output means and a deletion file information output means and referenced by a deletion date and time acquisition means and a file information input means. Recovery method.