7.16.6 fileType

Page 277 of 800

Search internet

A fileType request queries the type of a file. A fileType request is encoded as an lgcio request containing the following bytes:

First comes one byte which identifies the lgcio request as a fileType request. The value of that byte happens to be 10.

Then comes the path name p of the file whose type has to be inspected. The path can be given as a vector tree. The path is not allowed to contain null characters.

Finally comes a terminating null character.

To ease forging a fileType request, the base page defines the following construct:

The value of FileType is a singleton string whose sole byte is 10. The value of EOS (End Of String) is a singleton string whose sole byte is a null byte.

The reply to a fileType request is an lgcio reply which contains one byte. Hence, the reply has form

where r and i are the reference and index, respectively, of the lgcio construct and p is a one element list containing one one-byte string. The byte has one of the following five values:

0

The file does not exist

2

The file is regular

3

The file is a directory

4

The file is a symbolic link

1

The file is something else

The base page defines the following constants to help writing programs which interpret the reply:

Page 277 of 800

Search logiweb.eu