Abstract: The present disclosure provides a virus signature matching method, including: obtaining an inputted target file; loading a virus signature database, and successively extracting signature function identifiers from the virus signature database, the virus signature database comprising the signature function identifiers and virus signature type identifiers corresponding to the signature function identifiers; obtaining signature functions corresponding to the signature function identifiers, and checking the target file by invoking the signature functions, to obtain corresponding check results; and obtaining a virus signature type identifier corresponding to the target file according to the check results. In addition, a virus signature matching apparatus is further provided. The foregoing virus signature matching method and apparatus can improve virus scanning and removing efficiency.

Abstract: Various embodiments provide a file processing method and system. An exemplary file processing method can include receiving a request for opening a file, applying for a memory area corresponding to the file requested for opening and setting a property of the memory area as non-readable and non-writable. After receiving a request for reading the file, the memory area corresponding to the file requested for reading can be accessed. If the accessing fails for a failure reason that the property of the memory area is non-readable and non-writable, file data requested for reading can be obtained from a disk by calling a memory access exception handler function registered in an operating system. The obtained file data can be stored in the memory area. The property of the memory area can be set as readable and writable and the file data can be read from the memory area.

Abstract: The present disclosure provides a virus signature matching method, including: obtaining an inputted target file; loading a virus signature database, and successively extracting signature function identifiers from the virus signature database, the virus signature database comprising the signature function identifiers and virus signature type identifiers corresponding to the signature function identifiers; obtaining signature functions corresponding to the signature function identifiers, and checking the target file by invoking the signature functions, to obtain corresponding check results; and obtaining a virus signature type identifier corresponding to the target file according to the check results. In addition, a virus signature matching apparatus is further provided. The foregoing virus signature matching method and apparatus can improve virus scanning and removing efficiency.

Abstract: Various embodiments provide a file processing method and system. An exemplary file processing method can include receiving a request for opening a file, applying for a memory area corresponding to the file requested for opening and setting a property of the memory area as non-readable and non-writable. After receiving a request for reading the file, the memory area corresponding to the file requested for reading can be accessed. If the accessing fails for a failure reason that the property of the memory area is non-readable and non-writable, file data requested for reading can be obtained from a disk by calling a memory access exception handler function registered in an operating system. The obtained file data can be stored in the memory area. The property of the memory area can be set as readable and writable and the file data can be read from the memory area.