KR101591968B1 - Method for auto recovery of symbolic link using integrity check and terminal using the same - Google Patents

Abstract

The method includes generating list information of the symbolic link when integrity check request information for a symbolic link is input from a user; Performing a link integrity check on each symbolic link included in the list information; If an error symbolic link having an error is found as a result of the link integrity check, an original file corresponding to the error symbolic link is searched using matching information stored in the memory, and a source integrity check is performed on the searched original file step; And reconfiguring the error symbolic link based on the original file if the original file does not exist in accordance with the result of the original integrity check. .

Description

METHOD FOR AUTO RECOVERY OF SYMBOLIC LINK USING INTEGRITY CHECK AND TERMINAL USING THE SAME [0002]

The present invention relates to an automatic restoration method through integrity checking of a symbolic link and a terminal using the same.

Generally, an operating system of a terminal is designed to drive a plurality of programs stored in a memory according to a user's input.

In this case, a space in which a program is actually stored may be distinguished from a graphical user interface (GUI) that a user can visually recognize, so that a related program can be operated through selection of an icon displayed on a specific screen.

The basic method for designing such a GUI environment is a link technology linking a program with an icon.

The link is a technique for providing an icon of the GUI environment to the location information of the actual program and driving the actual program by accessing only the icon. It is usually divided into hard links and symbolic links (soft links).

A hard link is a link used as a principle of copying an original file and then making a copy of the original file. When editing is performed through a direct access to a copied link or an original file, . Also, even if the original is deleted, the copied link has the same contents as the original.

A symbolic link is a link that has the same structure as a pointer to an original file. Unlike a hard link, when a source file is modified or deleted, the symbolic link becomes unavailable.

Among the above links, in the case of symbolic links mainly used in operating systems such as Unix and Linux, frequent updating of the operating system causes frequent changes of the original file, causing an error of the related symbolic link. In addition, there are a large number of symbolic links in the operating system, and there is a problem in that a manual manipulation of the user is required to recover the symbolic link in which the error occurred.

An object of the present invention is to provide an automatic restoration method through integrity checking of a symbolic link that can automatically check integrity of a plurality of symbolic links and recover the same, and a terminal using the same.

According to an aspect of the present invention, there is provided a method for automatically recovering symbolic links by performing an integrity check, including the steps of: when integrity check request information for a symbolic link is input from a user, ; Performing a link integrity check on each symbolic link included in the list information; If an error symbolic link having an error is found as a result of the link integrity check, an original file corresponding to the error symbolic link is searched using matching information stored in the memory, and a source integrity check is performed on the searched original file step; And resetting the error symbolic link based on the original file if the original file is not abnormal according to the result of the original integrity check.

The performing the link integrity check on each of the symbolic links included in the list information may include determining whether the symbolic link is integrity based on the link information of the symbolic link.

The performing the link integrity check on each symbolic link included in the list information may further include determining whether the symbolic link is integrity based on the capacity information of the symbolic link.

The step of performing a link integrity check on each symbolic link included in the list information includes determining whether the symbolic link is integrity based on whether the linked original file is executed by driving the symbolic link As shown in FIG.

Here, if an error symbolic link having an error is found as a result of the link integrity check, an original file corresponding to the error symbolic link is searched using matching information stored in the memory, and a source integrity check is performed on the searched original file The executing step may include the step of comparing the original state information of the original file with the original reference value to determine whether the original file exists or not, and the original state information may be at least one of the location information and the capacity information .

The method may further include updating the matching information to correspond to the variation when the symbolic link and the original file corresponding thereto are changed.

The method may further include updating the matching information according to the error symbolic link that is reset when the error symbolic link is reset.

Outputting a link check message according to a result of the link integrity check; Outputting an original inspection message according to a result of the original integrity check; And outputting a reset message according to the resetting of the error symbolic link.

According to another aspect of the present invention, there is provided a terminal for automatically restoring an integrity check of a symbolic link according to another embodiment of the present invention, comprising: a memory for storing matching information of the symbolic link and a corresponding original file; And when the integrity check request information for the symbolic link is received, generates list information of the symbolic link, performs link integrity check on each symbolic link included in the list information, and generates an error symbolic symbol Searching the original file for the link based on the matching information, performing a source integrity check on the original file, and resetting the error symbolic link to correspond to the original file if there is no abnormality .

Here, the controller may determine whether the symbolic link is integrity based on the capacity information of the symbolic link.

Here, the control unit may determine whether the symbolic link is integrity based on whether the linked original file is executed by driving the symbolic link.

Here, the controller may update the matching information based on the variation of the symbolic link and the corresponding original file.

According to the automatic restoration method through the integrity check of the symbolic link according to the present invention and the terminal using the method, the integrity check and restoration of a plurality of symbolic links can be automatically performed.

In addition, the integrity check of the symbolic link and the original file can be performed in various ways to improve the reliability of the inspection.

1 is a block diagram illustrating a configuration of a terminal for automatically recovering a symbolic link according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a method and apparatus for automatically recovering a symbolic link.
FIGS. 3A to 3C are diagrams for explaining a process of an automatic restoration method through an integrity check of a symbolic link according to an embodiment of the present invention; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an automatic restoration method based on integrity checking of a symbolic link according to a preferred embodiment of the present invention and a terminal using the same will be described in detail with reference to the accompanying drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations.

1 is a block diagram illustrating a configuration of a terminal for automatically recovering a symbolic link according to an embodiment of the present invention.

As shown in FIG. 1, a terminal for automatic restoration through integrity checking of a symbolic link may include a user input unit 100, a memory 300, a display unit 500, and a control unit 700.

The user input unit 100 may include a keyboard, a mouse, a touch panel, and the like as means for receiving a predetermined input from a user. Therefore, the integrity check request information of the symbolic link can be input from the user through the user input unit 100. [

The memory 300 is a means for storing predetermined information. Symbolic link list information and symbolic links and matching information of the original files corresponding thereto can be stored. The memory 300 may include a main memory such as a RAM, an external memory such as a USB, and an external server memory such as a DB accessible by wireless communication. Therefore, when the memory 300 is a memory of an external memory or an external server, list information and matching information can be referred to even in the case of a failure of the main memory.

The display unit 500 is a means for visually outputting predetermined information. The display unit 500 includes a link check message relating to the link integrity check result of the symbolic link, an original check message regarding the result of the source integrity check of the original file, A reset message relating to < / RTI >

The control unit 700 generates list information on the symbolic link when the integrity check request information for determining whether the symbolic link is integrity is received, as means for controlling the above-described configurations. The control unit 700 may refer to the stored list information of the memory 300 or may generate new list information by searching all the symbolic links included in the operating system when the list information is generated.

Through the generated list information, the control unit 700 can refer to the capacity information of the symbolic link or drive the symbolic link to determine whether the corresponding symbolic link is integrity based on whether the linked original file is executed . When an error symbolic link in which an error has occurred is found, the control unit 700 searches the original file of the link through the matching information. The matching information is updated by the control unit 700 when the symbolic link and the corresponding original file are changed, so that the matching information can have the position information of the original file corresponding to the always symbolic link.

Thereafter, the control unit 700 performs a source integrity check to determine whether the original file is integrity-related. If there is no abnormality in the inspection result, the control unit 700 resets the error symbolic link so as to correspond to the original file.

Accordingly, when an error occurs in the symbolic link, the terminal searches the original file of the corresponding symbolic link through the matching information stored in the memory 300. [ Thereafter, the terminal can reestablish the symbolic link on the basis of the original file only when the integrity of the original file is proved, so that a reliable automatic restoration can be performed on errors of a plurality of symbolic links.

The configuration of the terminal for automatically recovering the symbolic link has been described above. In FIG. 2, the automatic recovery method through the integrity check of the symbolic link will be described in detail.

FIG. 2 is a flowchart illustrating an automatic restoration method through an integrity check of a symbolic link according to an embodiment of the present invention. Referring to FIG.

As shown in FIG. 2, it is determined whether the integrity check request information of the symbolic link is input from the first user (S11). If the integrity check request information is input, list information about the symbolic link is generated (S13). The list information may be generated by the control unit searching for a symbolic link existing in the operating system or based on a list of symbolic links previously stored in the memory. Thus, the list information may include a list of all symbolic links that exist in the operating system.

Thereafter, referring to the list information, a link integrity check is performed to determine whether integrity of each symbolic link is integrity (S15).

Here, as a method for determining whether or not the symbolic link is integrity,

1) Link information of the symbolic link can be referred to. The link information may include link state information indicating a link connection relationship between the symbolic link and the original file. Therefore, it is possible to determine whether or not the symbolic link is integrity based on the link connection by referring to the link status information.

For example, if the link status information is a True value indicating a normal connection relationship between the symbolic link and the source link, the symbolic link is determined to be normal, and if the link status information is False, the symbolic link can be determined to be an error.

2) The capacity information of the corresponding symbolic link can be referred to. Symbolic links usually take up some capacity (usually 4KB) because they store the location of the original file pointed to by them as data. Therefore, when the capacity of the symbolic link is out of the general reference value or is absent (0 KB), it can be determined by the error symbolic link in which the error occurred.

3) You can actually run the symbolic link. Thus, whether or not the symbolic link is integrity can be determined by whether or not the original file linked with the symbolic link is executed.

Through the link integrity check of the above-described methods, it is determined whether there is an error symbolic link which is a symbolic link having an error (S15). If there is no abnormality in the symbolic link, the test is terminated. If there is an error symbolic link, an original file corresponding to the error symbolic link is searched through the matching information stored in the memory (S19). At this time, a link check message for the result of the link integrity check may be output to the display unit so that the user can recognize the current inspection progress status.

The matching information relates to the symbolic link and the association information of the original file corresponding to the symbolic link. When the first symbolic link is generated, a unique identification number can be assigned to the symbolic link and the original file. Therefore, even if a modification such as a system update occurs, the matching information can be maintained uniquely. In addition, the matching information may include location information, capacity information, update information, etc. between the symbolic link and the original file, and if the symbolic link and the original file are changed, the matching information may be updated accordingly . Further, the matching information can store its own update history. In addition, the matching information may be stored in additional auxiliary memory in preparation for a system failure.

With this matching information, even when an error occurs in the symbolic link and access to the original file is difficult, the original file can be easily searched.

When the original file for the error symbolic link is found, a source integrity check is performed to determine the integrity of the original file (S21). As a method of checking the integrity of the original file, it is possible to determine whether the integrity of the original file is complete by comparing the original state information such as the location information and the capacity information of the original file with the original reference value. In addition, the integrity of the original file can be determined by actually driving the file and determining whether it is driven.

In this way, the presence or absence of an abnormality of the original file is judged through the original integrity check (S23), and an original inspection message for the result can be outputted. If an abnormality of the original file occurs, the corresponding error message is output (S25) and the inspection is terminated.

On the other hand, if there is no abnormality in the original file, an associated message is output and guided, and the error symbolic link is reset to correspond to the original file (S27). In other words, since the original file has no abnormality but only the symbolic link has an error, a reset may be performed in which the current location information of the original file is referenced and reflected in the error symbolic link. In this case, the existing path information of the existing error symbolic link is deleted, and new path information reflecting the current location information of the original file can be generated. Alternatively, the error symbolic link itself may be deleted and a new symbolic link linked to the original file may be created.

When the error symbolic link is reset in this manner, the reset symbolic link and the matching information for the original file are updated (S29) and the examination is terminated. When the inspection is finished, a reset message is displayed to guide the resetting.

Additionally, it is possible to determine the integrity of the symbolic link that has not been described in this figure but has been reset. In other words, if all of the above-mentioned checks are completed and the symbolic link is reset, the corresponding symbolic link is driven to check whether the related original file is executed and to output a message related thereto. Thus, the reliability of the reset symbolic link can be further improved.

According to the integrity check and automatic recovery method of the symbolic link as described above, if an error occurs in the symbol lock link, the original file can be searched through the matching information, and the symbolic link can be reset by referring to the original file without errors.

3A to 3C are views for explaining a process of an automatic restoration method through an integrity check of a symbolic link according to an embodiment of the present invention.

First, as shown in FIG. 3A, when integrity check request information for a symbol lock link is input, list information for a symbolic link is generated. The list information may be list information pre-stored in the memory, or may be list information that is newly generated through searching for an entire symbolic link existing in the operating system.

Here, the integrity check request information may be input through the user input unit, but may be input from an external terminal by the communication unit or automatically input by automatic setting.

The list information can be listed up the entire symbolic link. Thereafter, a link integrity check is performed on the entire symbolic links listed. Since the symbolic link has link information for the corresponding original file, it is possible to determine the error status of the symbolic link by using the link information, the capacity information, and whether the original file is actually executed by driving the symbolic link. Here, for example, a link integrity check is performed on the first symbolic link.

As shown in FIG. 3B, if an error occurs in the first symbolic link and is not linked to the original file, the original file can not be accessed through the first symbolic link. At this time, as shown in FIG. 3C, the original file of the first symbolic link is searched based on the memory where the existing first symbolic link and the matching information about the original file are stored.

Since the matching information is updated every time the symbolic link and the original file are changed, the matching information is updated every time the original file is changed by a modification such as a system update. Therefore, the original file position information at the current time is stored in the matching information, and the original file corresponding to the first symbolic link in which the error occurred can be searched.

When the original file is searched, the integrity check of the original file is performed to determine whether or not an abnormality exists. At this time, if an error does not occur, the first symbolic link can be reset through the current location information of the original file.

According to the above operation method, even if an error occurs in the symbolic link and linkage with the original file is impossible, the original file can be searched through the matching information, and the symbolic link can be reset according to the presence or absence of an error in the original file. In addition, since the above processes are all performed automatically, convenience and reliability can be further improved.

The automatic recovery method through the integrity check of the symbolic link and the terminal using the integrity checking method are not limited to the configuration and the operation method of the embodiments described above. The above embodiments may be configured so that all or some of the embodiments may be selectively combined to make various modifications.

100: user input unit 500: display unit
300: memory 700:

Claims (12)

Generating list information of the symbolic link when the integrity check request information for the symbolic link is input from the user;
Performing a link integrity check on each symbolic link included in the list information;
If an error symbolic link having an error is found as a result of the link integrity check, an original file corresponding to the error symbolic link is searched using matching information stored in the memory, and a source integrity check is performed on the searched original file step; And
And reconfiguring the error symbolic link based on the original file if the original file is not abnormal according to the result of the integrity check.
The method according to claim 1,
Wherein the step of performing a link integrity check on each symbolic link included in the list information comprises:
And determining whether the symbolic link is integrity based on the link information of the symbolic link.
The method according to claim 1,
Wherein the step of performing a link integrity check on each symbolic link included in the list information comprises:
And determining whether the symbolic link is integrity based on the capacity information of the symbolic link.
The method according to claim 1,
Wherein the step of performing a link integrity check on each symbolic link included in the list information comprises:
Further comprising the step of determining whether the symbolic link is integrity based on whether the linked original file is executed by driving the symbolic link.
The method according to claim 1,
If an error symbolic link having an error is found as a result of the link integrity check, an original file corresponding to the error symbolic link is searched using matching information stored in the memory, and a source integrity check is performed on the searched original file In the step,
And comparing the original state information of the original file with an original reference value to determine whether the original file is abnormal, wherein the original state information is at least one of position information and capacity information, Automatic recovery through.
The method according to claim 1,
And updating the matching information to correspond to the variation when the symbolic link and the original file corresponding to the symbolic link change occur.
The method according to claim 1,
And updating the matching information according to the error symbolic link that has been reset when the error symbolic link is reestablished.
The method according to claim 1,
Outputting a link check message according to a result of the link integrity check;
Outputting an original inspection message according to a result of the original integrity check; And
And outputting a reset message upon reestablishment of the error symbolic link.
A memory for storing symbolic links and matching information of original files corresponding to the symbolic links; And
When the integrity check request information for the symbolic link is received, generates list information of the symbolic link, performs link integrity checking for each symbolic link included in the list information, and generates an error symbolic link Searching for an original file for the original file based on the matching information and performing a source integrity check on the original file and resetting the error symbolic link to correspond to the original file if there is no abnormality, A terminal for automatically recovering data.
10. The method of claim 9,
Wherein,
And determines whether the symbolic link is integrity based on the capacity information of the symbolic link.
10. The method of claim 9,
Wherein,
And determines whether the symbolic link is integrity based on whether the linked original file is executed by driving the symbolic link.
10. The method of claim 9,
Wherein,
Wherein the matching information is updated based on a change in the symbolic link and the original file corresponding to the symbolic link.

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