File delete method, file open method, storage medium storing file delete program, and storage medium storing file open program

A file delete method used by a file processing device performing a process of outputting to a device driver side a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, the file delete method comprising:

• a directory entry obtaining step of obtaining in primary storage from an actual data area in secondary storage one cluster of directory entry information in a directory storing a file to be deleted, the secondary storage being a flash memory on which data is read and written in units of cluster;
• a delete mark adding step of determining whether the file in the obtained directory entry satisfies the predetermined condition specified from the application, not adding a delete mark to the file in the obtained directory entry when the file in the obtained directory entry does not satisfy the predetermined condition, not adding a delete mark to the file in the obtained directory entry in a case where the file in the obtained directory entry has a file attribute of read only or write protect even when the file in the obtained directory entry satisfies the predetermined condition, and adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition and does not have a file attribute of read only nor write protect;
• a freeing step of freeing FAT information stored in a FAT in the secondary storage corresponding to the file to which the delete mark is added;
• and
• a directory entry writing step of writing contents of the directory entry in the primary storage to a corresponding portion in the actual data area in the secondary storage when the delete mark adding step is performed on all files in the obtained directory entry;
• and
• a step of deleting as a target a file in the secondary storage according to a file allocation tables (FAT) file system;
• wherein the directory entry information includes file name and the delete mark is data added to the file name.

A file delete method used by a computer performing a process of outputting to a device driver side a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, the file delete method comprising:

• a directory entry obtaining step of obtaining one cluster of directory entry information in a directory storing a file to be deleted in primary storage from an actual data area in secondary storage, the secondary storage being a flash memory on which data is read and written in units of cluster;
• a delete mark adding step of determining whether the file in the obtained directory entry satisfies the predetermined condition specified from the application, not adding a delete mark to the file in the obtained directory entry when the file in the obtained directory entry does not satisfy the predetermined condition, not adding a delete mark to the file in the obtained directory entry in a case where the file in the obtained directory entry has a file attribute of read only or write protect even when the file in the obtained directory entry satisfies the predetermined condition, and adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition and does not have a file attribute of read only nor write protect;
• a directory entry writing step of writing a process result of the delete mark adding step to a corresponding portion of an actual data area in the secondary storage;
• and
• a freeing step of freeing FAT information stored in a FAT in the secondary storage corresponding to the file to which the delete mark is added;
• and
• a step of deleting as a target a file in the secondary storage according to a file allocation tables (FAT) file system;
• wherein the directory entry information includes file name and the delete mark is data added to the file name.

A file delete method used by a file processing device performing a process of outputting to a device driver side a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, the file delete method comprising:

• a directory entry obtaining step of obtaining one cluster of directory entry information in a directory storing a file to be deleted in primary storage from an actual data area in secondary storage, the secondary storage being a flash memory on which data is read and written in units of cluster;
• a delete mark adding step of determining whether the file in the obtained directory entry satisfies the predetermined condition specified from the application, not adding a delete mark to the file in the obtained directory entry when the file in the obtained directory entry does not satisfy the predetermined condition, not adding a delete mark to the file in the obtained directory entry in a case where the file in the obtained directory entry has a file attribute of read only or write protect even when the file in the obtained directory entry satisfies the predetermined condition, and adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition and does not have a file attribute of read only nor write protect;
• a directory entry writing step of writing a process result of the delete mark adding step to a corresponding portion of an actual data area in the secondary storage;
• and
• a freeing step of freeing FAT information stored in a FAT in the secondary storage corresponding to the file to which the delete mark is added;
• and
• a step of deleting as a target a file in the secondary storage according to a file allocation tables (FAT) file system;
• wherein the directory entry information includes file name and the delete mark is data added to the file name.

A storage medium storing a file delete program used by a computer performing a process of outputting to a device driver side a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, the program comprising:

• a directory entry obtaining step of obtaining in primary storage from an actual data area in secondary storage one cluster of directory entry information in a directory storing a file to be deleted, the secondary storage being a flash memory on which data is read and written in units of cluster;
• a delete mark adding step of determining whether the file in the obtained directory entry satisfies the predetermined condition specified from the application, not adding a delete mark to the file in the obtained directory entry when the file in the obtained directory entry does not satisfy the predetermined condition, not adding a delete mark to the file in the obtained directory entry in a case where the file in the obtained directory entry has a file attribute of read only or write protect even when the file in the obtained directory entry satisfies the predetermined condition, and adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition and does not have a file attribute of read only nor write protect;
• a freeing step of freeing FAT information stored in a FAT in the secondary storage corresponding to the file to which the delete mark is added;
• and
• a directory entry writing step of writing contents of the directory entry in the primary storage to a corresponding portion in the actual data area in the secondary storage when the delete mark adding step is performed on all files in the obtained directory entry;
• and
• a deleting step to delete as a target a file in the secondary storage according to a file allocation tables (FAT) file system;
• wherein the directory entry information includes file name and the delete mark is data added to the file name.

A storage medium storing a file delete program used by a file processing device performing a process of outputting to a device driver side a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, the program comprising:

• a directory entry obtaining step of obtaining in primary storage from an actual data area in secondary storage one cluster of directory entry information in a directory storing a file to be deleted, the secondary storage being a flash memory on which data is read and written in units of cluster;
• a delete mark adding step of determining whether the file in the obtained directory entry satisfies the predetermined condition specified from the application, not adding a delete mark to the file in the obtained directory entry when the file in the obtained directory entry does not satisfy the predetermined condition, not adding a delete mark to the file in the obtained directory entry in a case where the file in the obtained directory entry has a file attribute of read only or write protect even when the file in the obtained directory entry satisfies the predetermined condition, and adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition and does not have a file attribute of read only nor write protect;
• a freeing step of freeing FAT information stored in a FAT in the secondary storage corresponding to the file to which the delete mark is added;
• and
• a directory entry writing step of writing contents of the directory entry in the primary storage to a corresponding portion in the actual data area in the secondary storage when the delete mark adding step is performed on all files in the obtained directory entry;
• and
• a deleting step to delete as a target a file in the secondary storage according to a file allocation tables (FAT) file system;
• wherein the directory entry information includes file name and the delete mark is data added to the file name.

A storage medium storing a file delete program used by a computer performing a process of outputting to a device driver side a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, the program comprising:

• a directory entry obtaining step of obtaining one cluster of directory entry information in a directory storing a file to be deleted in primary storage from an actual data area in secondary storage, the secondary storage being a flash memory on which data is read and written in units of cluster;
• a delete mark adding step of determining whether the file in the obtained directory entry satisfies the predetermined condition specified from the application, not adding a delete mark to the file in the obtained directory entry when the file in the obtained directory entry does not satisfy the predetermined condition, not adding a delete mark to the file in the obtained directory entry in a case where the file in the obtained directory entry has a file attribute of read only or write protect even when the file in the obtained directory entry satisfies the predetermined condition, and adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition and does not have a file attribute of read only nor write protect;
• a directory entry writing step of writing a process result of the delete mark adding step to a corresponding portion of an actual data area in the secondary storage;
• and
• a freeing step of freeing FAT information stored in a FAT in the secondary storage corresponding to the file to which the delete mark is added;
• and
• a deleting step to delete as a target a file in the secondary storage according to a file allocation tables (FAT) file system;
• wherein the directory entry information includes file name and the delete mark is data added to the file name.

A storage medium storing a file delete program used by a file processing device performing a process of outputting to a device driver side a directive corresponding to a directive to delete a file satisfying a predetermined condition from an application, the program comprising:

• a directory entry obtaining step of obtaining one cluster of directory entry information in a directory storing a file to be deleted in primary storage from an actual data area in secondary storage, the secondary storage being a flash memory on which data is read and written in units of cluster;
• a delete mark adding step of determining whether the file in the obtained directory entry satisfies the predetermined condition specified from the application, not adding a delete mark to the file in the obtained directory entry when the file in the obtained directory entry does not satisfy the predetermined condition, not adding a delete mark to the file in the obtained directory entry in a case where the file in the obtained directory entry has a file attribute of read only or write protect even when the file in the obtained directory entry satisfies the predetermined condition, and adding in the primary storage a delete mark to the file in the obtained directory entry when the file in the obtained directory entry satisfies the predetermined condition and does not have a file attribute of read only nor write protect;
• a directory entry writing step of writing a process result of the delete mark adding step to a corresponding portion of an actual data area in the secondary storage;
• and
• a freeing step of freeing FAT information stored in a FAT in the secondary storage corresponding to the file to which the delete mark is added;
• and
• a deleting step to delete as a target a file in the secondary storage according to a file allocation tables (FAT) file system;
• wherein the directory entry information includes file name and the delete mark is data added to the file name.