JPH0675843A - File control system - Google Patents

Abstract

PURPOSE:To utilize a file in split without generating mismatching, in the case plural users refer to and update the same file. CONSTITUTION:An available right registering means 1 registers the available right of resources in a user definition table 6 of a common area. By referring thereto, an available right discriminating means 2 checks with regard to whether a user has the available right of the resources or not, and whether the request is within a range of the available right or not. An available state retaining means 3 retains the available state of request resources. A reference updating means 4 permits the update of a resources management table 7 and the availability of the resources. A deleting/finishing means 5 permits the update of the resources management table 7 and the user definition table 6, and the deletion and finish of the resources. In such a way, the same file can be shared in split by plural users.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file control method for avoiding inconsistency that occurs when a plurality of users divide and use the same file.

[0002]

2. Description of the Related Art In the conventional file control method, when a plurality of users divide and use a file, data inconsistency occurs when the same resource is updated, etc. It was not possible to divide and use the resources of.

[0003]

In the above-mentioned conventional file control method, inconsistency of data occurs when a plurality of users share a file and update resources simultaneously. It has drawbacks.

[0004]

According to the file control method of the present invention, in a file control method of a file management system in which a plurality of users divides and uses the same file, the right to use the resource is given to users in the system common area. A usage right registration means for registering in the definition table, and referring to the user definition table at the time of using the resource, whether the user has the right to use the resource, and the request is for the usage right of the user. A usage right discriminating means for checking whether it is within the range and a resource management table in the system common area are searched, and if the same resource is being used, the contents of the resource management table are stored in the storage stack. A storage unit, a reference updating unit that gives a permission to update the resource management table and use the resource at the time of requesting the process of referring to or updating the resource, It is configured and a deletion end means for providing a permission deletion or termination of updating and resources of the resource management table and the user definition table.

[0005]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the file control system of the present invention.

As shown in FIG. 1, in this embodiment, as an initial process, a file name, a divided file, a user name and a user right that can be used by a user are registered in a user definition table 6 having a tree structure. Usage right registration means 1 for performing processing
When the user uses the divided file, the usage right determination means 2 performs a determination processing to check whether or not the user has the right to access and whether the processing of the request exceeds the range of the usage right.
Then, the usage status storage means 3 that searches the resource management table 7 for whether or not the divided file requested for use is currently in use, and if there is a corresponding file, saves all of them in the save stack. When the request from the user is the process of referencing or updating the divided file, the contents of the save stack are checked to see if the request can be met, and if the request can be met, the resource management table 7 is updated and the resource usage permission is granted. When the request from the user is the processing of deleting or terminating the divided files,
Check the contents of the save area, user definition table 6
Alternatively, it comprises a deletion end means 5 for deleting the record of the resource management table 7 and releasing the area.

FIG. 2 is a diagram showing an example of the user definition table 6. FIG. 3 is a diagram showing an example of the resource management table 7. Further, FIG. 4 is a flow chart showing an example of processing of the usage right registration means 1 which is an initial processing when the divided file is used.

As shown in FIG. 4, the user definition table 6 of FIG. 2 is searched by the file name, the divided file name, and the user name (step 41). It is determined whether there is a matching record (step 42). If there is a matching record, only the usage right is updated and the process ends (step 43). If there is no matching record, since it is a new registration, one record area of the user definition table 6 is secured in the common area (step 44). The address of the newly secured area is set in the address after the last record of the user definition table 6 (step 45).
File name, split file name, user name,
The usage right and the previous address are set and the process ends (step 46).

FIG. 5 is a flow chart showing an example of the processing of the usage right discriminating means 2 for checking whether or not the user has the right to use the divided file when using the divided file.

As shown in FIG. 5, the user definition table 6 shown in FIG. 2 is searched by the file name, the divided file name and the user name (step 51). It is determined whether there is a corresponding record, and if there is no record, the process ends abnormally (step 5).
2). If there is a corresponding record, it is checked whether or not the processing request is within the range of the usage right set in the user definition table 6, and if it is out of the range, the process ends abnormally, and if it is within the range, the process ends (step 53). ).

FIG. 6 is a diagram showing an example of the processing of the usage status storage means 3 for storing the information of the person who is currently using the requested resource in the storage stack.

As shown in FIG. 6, one record is acquired from the resource management table 7 of FIG. 3 (step 61). If nothing is entered in the rear address of the acquired record, the process ends (step 62). If the address is set in the rear address, it is determined whether the file name and the divided file name match, and if they do not match, the process proceeds to step 61 (step 63). If they match, the contents of the matched record are saved in the save stack and the process proceeds to step 61 (step 64).

FIG. 7 shows the processing of the reference updating means 4 which, when the request from the user is in the reference mode or the update mode, checks the save stack and, if there is no problem, updates the resource management table 7 and gives a use permission. It is a flowchart which shows an example.

As shown in FIG. 7, the save stick is checked to see if it is currently using the divided file for which usage has been requested, and if not, the process moves to step 74 (step 71). If there is a user other than the reference mode at present, the process ends abnormally (step 72). If the request is other than the reference mode, the process ends abnormally (step 73). If the request is the reference mode, an area for one record of the resource management table 7 is secured from the common area (step 74). The user ID, the file name, the divided file name, and the usage mode are set in the secured area and added to the tree structure of the resource management table 7 (step 75). The user ID is returned to the user (step 76).

In FIG. 8, when a request from a user is deleted or terminated (division of a divided file), the save stack is checked and if there is no problem, the resource management table 7 or the user definition table 6 is updated. 8 is a flowchart showing an example of processing of the ending unit 5.

As shown in FIG. 8, it is determined whether or not the request is a termination process (step 81). If it is a request for end processing, the resource management table 7 is searched by the user ID, the corresponding record is removed from the tree structure, the area is released, and the processing is ended (step 82). If it is not a request for termination processing, it is a request for deletion processing, so the save stack is checked, and if there is a person who is currently using the resource, it is abnormally terminated (step 83). If there is no user at present, the user definition table 6 is searched by the file name and the split file name,
All the corresponding records are removed from the tree structure, the area is released, and the process ends (step 84).

[0017]

As described above, according to the file control method of the present invention, when a plurality of users refer to or update the same file, the file is divided without causing inconsistency. It has the effect that it can be shared.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a file control system of the present invention.

FIG. 2 is a diagram showing an example of a user definition table 6.

FIG. 3 is a diagram showing an example of a resource management table 7.

FIG. 4 is a flowchart showing an example of processing of the usage right registration means 1.

FIG. 5 is a flowchart showing an example of processing of the usage right discriminating means 2;

FIG. 6 is a flow chart showing an example of processing of a usage status storage unit 3.

FIG. 7 is a flow chart showing an example of processing of a reference updating unit 4.

FIG. 8 is a flow chart showing an example of processing of a deletion end means 5.

[Explanation of symbols]

 1 usage right registration means 2 usage right determination means 3 usage status storage means 4 reference update means 5 deletion end means 6 user definition table 7 resource management table

Claims (1)

[Claims] 1. In a file control method of a file management system in which a plurality of users divides and uses the same file, a user right registration means for registering a resource use right in a user definition table in a system common area, and a resource. Refer to the user definition table when using
A usage right determination means for checking whether the user has the right to use the resource and whether the request is within the usage right of the user, and the resource management table in the system common area are searched, If the same resource is being used, a usage state saving means for saving the contents of the resource management table in a save stack, and updating the resource management table and permitting the use of the resource at the time of requesting a process for referring or updating the resource. A reference updating means for giving, and a deletion ending means for giving permission for updating the resource management table and the user definition table and for deleting or ending the resource when a request for processing for deleting or ending the resource is made. File control method.