Accessing Operating-System Files in Client LIBMI Applications

In a client LIBMI application, the DataBlade API file-access functions perform the same type of task as operating-system file-management functions such as open( ) and close( ). Table 91 shows the basic file operations with the DataBlade API file-access functions that perform them and the analogous operating-system calls for these file operations.

Use of the DataBlade API file-access functions is optional in a client LIBMI application. However, use of the DataBlade API file-access functions to ensure consistency and portability of code between client and server DataBlade API modules is recommended.

For DataBlade API modules that you design to run in both client LIBMI applications and UDRs, use the DataBlade API file-access functions. The behavior of these functions in client LIBMI applications is basically the same as in C UDRs. For a description of these files, see Access to Operating-System Files.

The main difference in behavior of the DataBlade API file-access functions is that the mi_open( ) function opens files on the client computer, not the server computer. The filename that you specify to mi_open( ) is relative to the client computer.