JPS6454556A - File checking system - Google Patents
File checking systemInfo
- Publication number
- JPS6454556A JPS6454556A JP62211201A JP21120187A JPS6454556A JP S6454556 A JPS6454556 A JP S6454556A JP 62211201 A JP62211201 A JP 62211201A JP 21120187 A JP21120187 A JP 21120187A JP S6454556 A JPS6454556 A JP S6454556A
- Authority
- JP
- Japan
- Prior art keywords
- program
- crc
- block
- read
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE:To confirm the normality of a program file at the time of loading a program, and to prevent the generation of a long time processing, etc., by a breakdown program, by comparing a value of a read CRC block with a calculated a CRC value. CONSTITUTION:A program is segmented into (n) blocks of P(1)-P(n), and first of all, a counter of a program block is initialized to '1', and P(1) is read from a disk and written to a memory. Subsequently, whether P(1) has been read normally or not is checked, and when it is read normally, the CRC calculation of the block P(1) is executed, and also, a CRC block C(1) to the block P(1) of a CRC file of a disk is read out. Next, a value of the read CRC block C(1) and a calculated CRC value are compared, and in case of discrepancy, an install request display is executed, and a system is stopped. In such a way, the normality of a program file can be confirmed at the time of loading a program, and the generation of a long time processing, etc., by a breakdown program can be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211201A JPS6454556A (en) | 1987-08-25 | 1987-08-25 | File checking system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62211201A JPS6454556A (en) | 1987-08-25 | 1987-08-25 | File checking system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6454556A true JPS6454556A (en) | 1989-03-02 |
Family
ID=16602036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62211201A Pending JPS6454556A (en) | 1987-08-25 | 1987-08-25 | File checking system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6454556A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07319775A (en) * | 1994-05-23 | 1995-12-08 | Nec Corp | Memory collation system |
-
1987
- 1987-08-25 JP JP62211201A patent/JPS6454556A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07319775A (en) * | 1994-05-23 | 1995-12-08 | Nec Corp | Memory collation system |
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