JPH08185347A - How to save / restore files - Google Patents

Abstract

(57) [Summary] [Purpose] While prohibiting backup of files that require copy protection and write protection of standard function software that is bundled and distributed to hardware, the relation of other files to be backed up Take measures to prevent loss of sex. [Structure] Only the key information that can identify the file is backed up at the time of backup processing for the file with the protection attribute specified, and at the time of backup restoration processing
It is configured to check whether the same file is installed in advance at the restoration destination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to the handling of files to be protected in file saving / restoring processing of programmable devices and information processing equipment, and particularly in control equipment such as programmable controllers. File save / restore method that improves the file management function required to protect the basic functions and software parts on software that is provided as a standard bundled with or provided in advance, and standard functions for specific applications. Regarding

[0002]

2. Description of the Related Art In recent years, from the aspect of emphasizing software productivity, the demand for software componentization and packaging has become extremely strong. However, various conventional file protection methods have been used in the field of information processing equipment. As a general method, the attribute is added to the file to determine whether the OS is write-protected or read-protected (copy prohibited), and the password is set to the file under OS management. There is a method to check access rights. In addition to this, OS [operation syst
Various protection processes for disabling the copy function of [em] (hidden directories, management of execution keys in hidden files, triggers to be executed only on machines with registered serial numbers, etc.) have been devised. In this case, when the file save processing is executed, the protection target file is excluded from the save processing target at all, or even if the protection target file is protected.
Either operation is unconditionally saved by the forced save function of S.

[0003]

However, the above-mentioned conventional techniques are bundled with hardware in a control device such as a programmable controller as a standard or pre-installed software provided as a standard. The following problems occur when trying to protect functions or software components. In using these software components, generally, setting parameters for operating the software components in an optimum environment and related software that realizes individual functions in cooperation with the software components are required. In this way, it is important to manage the data and programs that are closely related to the software component integrally with the software component that is the protection target, and to save them without losing the relationship. , The software component side is not the save target, and only the related data and related program are saved, or both are backed up. In the former case, the restoration process is executed for another software component that has a similar function by mistake when restoring a file due to file destruction, or for a device with a software component that has become incompatible due to a version upgrade. Then, there is a problem that inconsistency occurs between the software component and the related data / related program. In the latter case, although there is no inconvenience in saving / restoring processing, there is a problem in that a large number of software components to be protected are illegally copied using the saved files. Therefore, the present invention does not perform save processing for files with protection specified, but at the time of restore processing, the validity of the protected files already implemented at the restore destination is checked, and the save file and protected file are checked. It is an object to provide a method of backing up / restoring files that can achieve consistency between files.

[0004]

In order to solve the above problems, the present invention provides a file protection management means A for protecting files against duplication, saving, and restoration, and file identification information held in a file storage means B. (F _{21 to} F _2n ) and protection attribute information (F _{31 to} F _3n ) each relating to a programmable control device comprising one or more file bodies (F _{11 to} F _1n ) attached to the file protection management means A. [1] According to the protection attribute information F _{3i (i = 1} to _n) of each file when the file is copied and saved from the file storage unit B to another file storage unit, the file is a file showing the protection attribute. The identification information and the protection attribute information itself, or the key information G _{j (j = 1} to _m) that can identify such information
And the file body does not perform the copy save of the file itself, and [2] when the copy saved in the external file storing means E is restored in the file storing means B of the self-control device. In accordance with the key information to be copied and saved, the file body of the protection attribute file is not copied and saved, so the copy is restored and the file is already held in the self-control-device file storage means B that is the restoration destination. When the file identification information of the file is searched and collated and the existence of a derived file having the same or a corresponding function corresponding to the key information G _{j (j = 1} to _m) cannot be detected, a pre-defined exception processing C is performed. Is a file backup / restoration method that has both of the functions [1] and [2] described above, and a file replication restoration function for activating

[0005]

According to the present invention, since the file having the protection attribute is not copied and saved by the above means, it is possible to prevent the protection attribute file from being copied indefinitely. On the other hand, the file identification information about the protection attribute file and the protection attribute information itself or the key information that can identify them is saved during the copy save processing. It is possible to check the validity of the protection target file that has already been implemented, and it is possible to make a match between the saved file and the protected file.

[0006]

The present invention implements the following means. That is, FIG. 1 is a block diagram showing the constitutional requirements of the present invention, FIG. 2 is a copy saving process flow showing the principle of the present invention, and FIG. 3 is a copy restoring process flow showing the principle of the present invention. The principle is shown, and the solution will be described below based on this. According to the present invention, as shown in FIG. 1, file protection management means A for protecting files against copying, saving and restoring, and file identification information (F ₂₁ to
F _2n ) and protection attribute information (F _{31 to} F _3n ) each relating to a programmable control device consisting of one or more file bodies (F _{11 to} F _1n ) attached, in the file protection management means A,

(1) When a file is copied and saved (backed up) from the file storage means B to another file storage means, as shown in the flowchart of FIG. 2, the protection attribute information F _{3i (i = 1} to _{According to n)} , in the case of the file showing the protection attribute, the file identification information and the protection attribute information itself, or the key information G capable of specifying those information
_{j (j = 1} to _m) ) is saved by copying and the file itself is not saved by copying, and (2) the file saved in the external file storage means E is stored in the self-control device. When a copy is restored in the storage unit B (restore), as shown in the flowchart of FIG. 3, according to the key information to be copied and saved, the file body of the protection attribute file is not copied and saved, and therefore the copy is not restored. Instead, the file identification information of the file already stored in the file storage means B in the self-control device which is the restoration destination is searched and collated, and the same or equivalent function corresponding to the key information G _{j (j = 1} to _m) is obtained. When the existence of the derived file of ## EQU1 ## is not detected, the pre-defined exception processing C is activated and the file duplication restoration function for interrupting the duplication restoration processing is performed (1) and (2). And performs saving and restoring method of the file and features that have a function.

Each embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a system configuration diagram in one embodiment of the present invention, which is a basic principle diagram of the invention described above (FIG. 1).
Is more specifically represented. 5 shows an example of a file management table at the time of copy saving processing according to an embodiment of the present invention, and FIG. 6 shows an example of a file management table of saved data according to an embodiment of the present invention.

The present embodiment is an example of a system for controlling a carousel. In the figure, 1 is a programmable controller, 2 is a microprocessor (μP), and 3 is an R in which basic software is installed.
OM, 5 is non-volatile memory, 8 is RAM, and 9,1
It is composed of 0, 11, and 12 peripheral device interface sections. 9 is a peripheral device I / F ₁ to which a programming tool 13 is connected, and a command for saving / restoring is input using the programming tool 13, and an external file storage means FPD [fl
The copy is saved to the oppy disk] 14. Peripheral device I /
The F section (10, 11, 12) is further connected to external peripheral devices (15, 16, 17) (motor drive, audio equipment, etc.), and finally the stage 19 of the carousel 18 rotates, It is assumed that control such as the vertical movement 20 of the horse, the music performance from the speaker 21, the blinking of the electric decoration 22 attached around the stage, and the like are performed.

In the basic software of the ROM 3, there is a file protection management unit 4 for copying / saving / restoring files. Based on the principle of the present invention, the copy saving flow of FIG. 2 and the copy restoring flow of FIG. 3 are executed. ing. The non-volatile memory 5, which is a file storage unit, is divided into a file management area 6 and a real file area 7. The file management area 6 has a file management table as shown in FIG. Stores the actual data of each file body shown in the file management table (FIG. 5).

FIG. 5 shows the programmable controller 1
It is an example showing the state of the file management table in. Here, in addition to the location information in the actual file area 7 of the file body, file identification information (data type, file name, version number) and attribute information [R (readable attribute), W (variable attribute), P (protected) Attribute)].

FIG. 6 is a file management table in the data of the FPD 14 saved to the outside. Although the data structure is similar to the file management table in the programmable controller 1, it is key information in the attribute column of the file. The only difference is that it has a K attribute indicating that.

FIG. 7 shows an example of a file management table showing another embodiment of the present invention, and FIG. 8 shows a flow of business assumed in another embodiment of the present invention. That is, FIG. 7 shows a typical workflow of these programmable controllers and their programming tasks. According to this, in the 1: programmable controller manufactured in the process of, the standard function is pre-installed and the protection attribute is designated for each function for each application in the process when the device is shipped (Fig. Column P of 5 is 1).

In the present embodiment, as shown in FIG. 5, three items, that is, a rotary control function for a stage, a vertical motion control function for a horse, and an audio device control function for playing music are implemented for a rotary horse system. Suppose In the process for this, it is assumed that the user completes the system by mounting various files and programs with file ID = 4 or later. The file added by the user is an unprotected file, and in this embodiment,
It is closely related to the standard functions with the protection attribute specified, such as performance data referenced when the protection attribute file is executed, setting parameters such as the number of horses, and the main program for using each standard function. Suppose the file is included.

When the system is completed, the user backs up (creates a copy of) the created program in the process of
The contents of the save file obtained as a result are as shown in FIG. 6, and the storage area of the file body is allocated in 14: FPD for each file of the unprotected attribute, and the start address of the file is stored in the file management table of FIG. The data length is set and replication is performed. On the other hand, regarding the three files for which the protection attribute has been specified, the file body is not duplicated, and therefore the area is not allocated in the FPD 14, and only the data (data type, A file name, version number) and attribute data are created as key information for specifying a file, and 1 is set in the K column in the attribute. This is the result according to the processing flow of FIG.

On the other hand, when the device is replaced or the file is replaced (the function is replaced) as in the process due to the device failure or the file destruction, the copy / restoration is performed in the process. At this time, the file protection management unit 4 of the programmable controller 1 operates according to the flow shown in FIG. 3, and normally, the three files (IDs with the protection attributes designated as in the file organization immediately after shipment (ID
= 1, 2, 3), ID = 1, 2,
The replication restoration flow proceeds normally to see the agreement with 3.
Other files (ID = 4 or later) in the saved data are also normally duplicated in the non-volatile memory 5 and can be restored to the same file organization as in FIG.

However, if the controller in which another standard function is mounted is mistakenly arranged like the flow of -p or the version number of the standard function is changed and the compatibility cannot be guaranteed, , ID in the saved data = 1 to 3
Since a file that matches any of the above information cannot be found in the file management table of the restoration destination, FIG.
The sequence of abnormal termination from the exception handling in the flow of No. will cause the copy / restoration to fail.

As another embodiment of the present invention, a case where the data structure of the file management table is arranged as shown in FIG. 7 will be described. In FIG. 7, in addition to the information of the file management table of FIG. 5, a compatibility data pointer for connecting the compatibility determination table is added. In the compatibility determination table pointed to by this pointer, the compatibility level, the determination condition, and the system message data when the condition matches are set.

These pieces of data are used when determining the identity of the file identification information in the duplication restoration processing flow of FIG. 3. Specifically, after comparing the data type and the file name, the identity of the version number is determined. For the determination of, the version number data in the saved data as shown in FIG. 6 is checked not by simply comparing the version number data, but by checking whether any of the conditional expressions in the compatibility determination table described above matches. If there is a match, the file identity and compatibility are judged based on the compatibility specified in the compatibility level column. Figure 7
In the example, the compatibility levels are classified as compatible version A, minor incompatibility B, incompatibility item C, and incompatibility level outside, and the file version relations are A to C. For example, a warning can be sent to those who may be incompatible even though the replication restoration processing continues.

[0020]

As described above, according to the present invention, since the file body having the protection attribute designated is not copied at the time of copying and saving the file, it is possible to prevent unlimited copying of the file. It is possible to exert an effect. Furthermore, when a file is copied and restored, the integrity of the set of saved files and the restoration destination file is checked based on the key information for the files with the protected attribute. There is an effect that it is possible to recognize the consistency in the restoration process between the file and the file with the protection attribute that has not been saved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing configuration requirements of the present invention.

FIG. 2 is a copy saving processing flow showing the principle of the present invention.

FIG. 3 is a copy restoration processing flow showing the principle of the present invention.

FIG. 4 is a system configuration diagram showing an embodiment of the present invention.

FIG. 5 is an example of a file management table during copy save processing according to an embodiment of the present invention.

FIG. 6 is an example of a file management table of saved data showing an embodiment of the present invention.

FIG. 7 is an example of a file management table showing another embodiment of the present invention.

FIG. 8 is a flow of business assumed in another embodiment of the present invention.

[Explanation of symbols]

A file protection management means B file storage means C exception processing D programmable control device E external file storage means F _1i file body (i = 1 to n, n is the total number of files) F _2i file identification information F _3i protection attribute information G _j Key information (j = 1 to m, m is the number of protection attribute files during save processing) 1 Programmable controller 2 Microprocessor 3 ROM 4 File protection management means 5 Nonvolatile memory 6 File management area 7 Real file area 8 RAM 9 Peripheral device I / F ₁ 10 Peripheral device I / F ₂ 11 Peripheral device I / F ₃ 12 Peripheral device I / F ₄ 13 Programming tool 14 FPD 15 Peripheral device ₁ 16 Peripheral device ₂ 17 Peripheral device ₃ 18 Carousel 19 Stage 20 Wooden horse 21 Speaker 22 Illumination 10a Programmable controller hardware 1 b Programmable controller hardware 10h Programmable controller hardware 20a Standard function software for various specific / use a 20b Standard function software for various specific / use b 20h Standard function software for various specific / use h 30a Implemented on programmable controller Standard function 30b Standard function implemented on programmable controller 40a User program and adjustment data 50a implemented on programmable controller 50a Copy save file according to the present invention Manufacturing process of hardware Mounting process of standard function for specific application Shipping process User Program, adjustment process Copy save process Operating status -p Illegal copy Device replacement, function replacement, etc. Copy restoration process -p Prevention of restoration to wrong function Restoration completed

Claims (1)

[Claims] 1. A file protection management means A for protecting a file from being copied, saved and restored, and file identification information (F _{21 to} F _2n ) and protection attribute information (F ₃₁ to F) held in a file storage means B. _3n ) each of which is a programmable control device comprising one or more file bodies (F _{11 to} F _1n ) attached to each other, in the file protection management means A, [1] stores a file from the file storage means B to another file storage When copying and saving to the means, according to the protection attribute information F _{3i (i = 1} to _n) of each file, in the case of a file showing a protection attribute, the file identification information and the protection attribute information itself, or those information can be specified. key information _{G j (j = 1 ~ m} ) replication saved file main body is a replication retraction capabilities of the file is not performed replication retraction is replicated saved to [2] external file storage unit E When a file is duplicated and restored in the file storage means B of the self-control device, the file body of the protection attribute file is not duplicated and saved according to the key information that is duplicated and saved. The file identification information of the file already stored in the file storage means B in the self-control device is searched and collated, and the key information G
_When the existence of a derived file of the same or equivalent function corresponding to _{j (j = 1} to _m) cannot be detected, a pre-defined exception process C is activated and the duplication of the file that suspends the duplication restoration process is started. [1] and [2] with a restoration function
Saving files characterized by having both functions
How to restore.