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SQLInstallDriverManager Function

  • Artikkeli

Conformance
Version Introduced: ODBC 1.0: Deprecated in Windows XP Service Pack 2, Windows Server 2003 Service Pack 1, and later operating systems

Summary
SQLInstallDriverManager returns the path of the target directory for the installation of the ODBC core components. The calling program must actually copy the Driver Manager's files to the target directory.

Syntax

  
BOOL SQLInstallDriverManager(  
     LPSTR    lpszPath,  
     WORD     cbPathMax,  
     WORD *   pcbPathOut);

Arguments

lpszPath
[Output] Path of the target directory of the installation.

cbPathMax
[Input] Length of lpszPath. This must be at least _MAX_PATH bytes.

pcbPathOut
[Output] Total number of bytes (excluding the null-termination byte) returned in lpszPath. If the number of bytes available to return is greater than or equal to cbPathMax, the path in lpszPath is truncated to cbPathMax minus the null-termination character. The pcbPathOut argument can be a null pointer.

Returns

The function returns TRUE if it is successful, FALSE if it fails.

Diagnostics

When SQLInstallDriverManager returns FALSE, an associated *pfErrorCode value can be obtained by calling SQLInstallerError. The following table lists the *pfErrorCode values that can be returned by SQLInstallerError and explains each one in the context of this function.

*pfErrorCode Error Description
ODBC_ERROR_GENERAL_ERR General installer error An error occurred for which there was no specific installer error.
ODBC_ERROR_INVALID_BUFF_LEN Invalid buffer length The lpszPath argument was not large enough to contain the output path. The buffer contains the truncated path.

The cbPathMax argument was less than _MAX_PATH.
ODBC_ERROR_USAGE_UPDATE_FAILED Could not increment or decrement the component usage count The installer failed to increment the ODBC core component usage count.
ODBC_ERROR_OUT_OF_MEM Out of memory The installer could not perform the function because of a lack of memory.

Comments

SQLInstallDriverManager is called to return the path for ODBC core components and increment the component usage count in the system information. If a version of the Driver Manager already exists but the component usage count for the driver does not exist, the new component usage count value is set to 2.

The application setup program is responsible for physically copying the core component files and maintaining the file usage counts. If a core component file has not previously been installed, the application setup program must copy the file, and create the file usage count. If the file has previously been installed, the setup program merely increments the file usage count.

If an older version of the Driver Manager was previously installed by the application setup program, the core components should be uninstalled and then reinstalled, so that the core component usage count is valid. SQLRemoveDriverManager should first be called to decrement the component usage count. SQLInstallDriverManager should then be called to increment the component usage count. The application setup program must replace the old core component files with the new files. The file usage counts will remain the same, and other applications that used the older version core component files will now use the newer version files.

In a fresh install of the ODBC core components, drivers, and translators, the application setup program should call the following functions in sequence: SQLInstallDriverManager, SQLInstallDriverEx, SQLConfigDriver (with an fRequest of ODBC_INSTALL_DRIVER), and then SQLInstallTranslatorEx. In an uninstall of the core components, drivers, and translators, the application setup program should call the following functions in sequence: SQLRemoveTranslator, SQLRemoveDriver, and then SQLRemoveDriverManager. These functions must be called in this sequence. In an upgrade of all components, all the uninstall functions should be called in sequence and then all the install functions should be called in sequence.

For information about See
Adding, modifying, or removing a driver SQLConfigDriver
Installing a driver SQLInstallDriverEx
Installing a translator SQLInstallTranslatorEx
Removing a driver SQLRemoveDriver
Removing the Driver Manager SQLRemoveDriverManager
Removing a translator SQLRemoveTranslator